| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Subhash Jadavani | 19183 | 60.12% | 25 | 13.37% |
| Sujit Reddy Thumma | 2541 | 7.96% | 17 | 9.09% |
| Yaniv Gardi | 1567 | 4.91% | 38 | 20.32% |
| Dolev Raviv | 1536 | 4.81% | 12 | 6.42% |
| Sahitya Tummala | 1135 | 3.56% | 4 | 2.14% |
| Santosh Yaraganavi | 1006 | 3.15% | 2 | 1.07% |
| Avri Altman | 668 | 2.09% | 5 | 2.67% |
| MichalX Potomski | 637 | 2.00% | 2 | 1.07% |
| Seungwon Jeon | 619 | 1.94% | 9 | 4.81% |
| Björn Andersson | 305 | 0.96% | 3 | 1.60% |
| Alim Akhtar | 299 | 0.94% | 4 | 2.14% |
| Christoph Hellwig | 286 | 0.90% | 5 | 2.67% |
| Vinayak Holikatti | 284 | 0.89% | 2 | 1.07% |
| Gilad Broner | 258 | 0.81% | 6 | 3.21% |
| Ohad Sharabi | 255 | 0.80% | 2 | 1.07% |
| Lee Susman | 198 | 0.62% | 1 | 0.53% |
| Stanislav Nijnikov | 150 | 0.47% | 4 | 2.14% |
| Vivek Gautam | 141 | 0.44% | 1 | 0.53% |
| Adrian Hunter | 109 | 0.34% | 1 | 0.53% |
| Tomas Winkler | 105 | 0.33% | 4 | 2.14% |
| Akinobu Mita | 90 | 0.28% | 4 | 2.14% |
| Kees Cook | 88 | 0.28% | 2 | 1.07% |
| Venkat Gopalakrishnan | 78 | 0.24% | 4 | 2.14% |
| Vijay Viswanath | 56 | 0.18% | 1 | 0.53% |
| Zang Leigang | 56 | 0.18% | 6 | 3.21% |
| Kiwoong Kim | 46 | 0.14% | 4 | 2.14% |
| Huanlin Ke | 44 | 0.14% | 2 | 1.07% |
| Raviv Shvili | 39 | 0.12% | 1 | 0.53% |
| Bart Van Assche | 26 | 0.08% | 1 | 0.53% |
| Joao Pinto | 21 | 0.07% | 1 | 0.53% |
| Tomohiro Kusumi | 20 | 0.06% | 6 | 3.21% |
| Szymon Mielczarek | 19 | 0.06% | 2 | 1.07% |
| Maya Erez | 14 | 0.04% | 1 | 0.53% |
| Gustavo A. R. Silva | 12 | 0.04% | 1 | 0.53% |
| Li Wei | 10 | 0.03% | 1 | 0.53% |
| Evan Green | 7 | 0.02% | 1 | 0.53% |
| Hannes Reinecke | 1 | 0.00% | 1 | 0.53% |
| Johannes Thumshirn | 1 | 0.00% | 1 | 0.53% |
| Total | 31910 | 187 |
/* * Universal Flash Storage Host controller driver Core * * This code is based on drivers/scsi/ufs/ufshcd.c * Copyright (C) 2011-2013 Samsung India Software Operations * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved. * * Authors: * Santosh Yaraganavi <santosh.sy@samsung.com> * Vinayak Holikatti <h.vinayak@samsung.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * See the COPYING file in the top-level directory or visit * <http://www.gnu.org/licenses/gpl-2.0.html> * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * This program is provided "AS IS" and "WITH ALL FAULTS" and * without warranty of any kind. You are solely responsible for * determining the appropriateness of using and distributing * the program and assume all risks associated with your exercise * of rights with respect to the program, including but not limited * to infringement of third party rights, the risks and costs of * program errors, damage to or loss of data, programs or equipment, * and unavailability or interruption of operations. Under no * circumstances will the contributor of this Program be liable for * any damages of any kind arising from your use or distribution of * this program. * * The Linux Foundation chooses to take subject only to the GPLv2 * license terms, and distributes only under these terms. */ #include <linux/async.h> #include <linux/devfreq.h> #include <linux/nls.h> #include <linux/of.h> #include <linux/bitfield.h> #include "ufshcd.h" #include "ufs_quirks.h" #include "unipro.h" #include "ufs-sysfs.h" #include "ufs_bsg.h" #define CREATE_TRACE_POINTS #include <trace/events/ufs.h> #define UFSHCD_REQ_SENSE_SIZE 18 #define UFSHCD_ENABLE_INTRS (UTP_TRANSFER_REQ_COMPL |\ UTP_TASK_REQ_COMPL |\ UFSHCD_ERROR_MASK) /* UIC command timeout, unit: ms */ #define UIC_CMD_TIMEOUT 500 /* NOP OUT retries waiting for NOP IN response */ #define NOP_OUT_RETRIES 10 /* Timeout after 30 msecs if NOP OUT hangs without response */ #define NOP_OUT_TIMEOUT 30 /* msecs */ /* Query request retries */ #define QUERY_REQ_RETRIES 3 /* Query request timeout */ #define QUERY_REQ_TIMEOUT 1500 /* 1.5 seconds */ /* Task management command timeout */ #define TM_CMD_TIMEOUT 100 /* msecs */ /* maximum number of retries for a general UIC command */ #define UFS_UIC_COMMAND_RETRIES 3 /* maximum number of link-startup retries */ #define DME_LINKSTARTUP_RETRIES 3 /* Maximum retries for Hibern8 enter */ #define UIC_HIBERN8_ENTER_RETRIES 3 /* maximum number of reset retries before giving up */ #define MAX_HOST_RESET_RETRIES 5 /* Expose the flag value from utp_upiu_query.value */ #define MASK_QUERY_UPIU_FLAG_LOC 0xFF /* Interrupt aggregation default timeout, unit: 40us */ #define INT_AGGR_DEF_TO 0x02 #define ufshcd_toggle_vreg(_dev, _vreg, _on) \ ({ \ int _ret; \ if (_on) \ _ret = ufshcd_enable_vreg(_dev, _vreg); \ else \ _ret = ufshcd_disable_vreg(_dev, _vreg); \ _ret; \ }) #define ufshcd_hex_dump(prefix_str, buf, len) do { \ size_t __len = (len); \ print_hex_dump(KERN_ERR, prefix_str, \ __len > 4 ? DUMP_PREFIX_OFFSET : DUMP_PREFIX_NONE,\ 16, 4, buf, __len, false); \ } while (0) int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len, const char *prefix) { u8 *regs; regs = kzalloc(len, GFP_KERNEL); if (!regs) return -ENOMEM; memcpy_fromio(regs, hba->mmio_base + offset, len); ufshcd_hex_dump(prefix, regs, len); kfree(regs); return 0; } EXPORT_SYMBOL_GPL(ufshcd_dump_regs); enum { UFSHCD_MAX_CHANNEL = 0, UFSHCD_MAX_ID = 1, UFSHCD_CMD_PER_LUN = 32, UFSHCD_CAN_QUEUE = 32, }; /* UFSHCD states */ enum { UFSHCD_STATE_RESET, UFSHCD_STATE_ERROR, UFSHCD_STATE_OPERATIONAL, UFSHCD_STATE_EH_SCHEDULED, }; /* UFSHCD error handling flags */ enum { UFSHCD_EH_IN_PROGRESS = (1 << 0), }; /* UFSHCD UIC layer error flags */ enum { UFSHCD_UIC_DL_PA_INIT_ERROR = (1 << 0), /* Data link layer error */ UFSHCD_UIC_DL_NAC_RECEIVED_ERROR = (1 << 1), /* Data link layer error */ UFSHCD_UIC_DL_TCx_REPLAY_ERROR = (1 << 2), /* Data link layer error */ UFSHCD_UIC_NL_ERROR = (1 << 3), /* Network layer error */ UFSHCD_UIC_TL_ERROR = (1 << 4), /* Transport Layer error */ UFSHCD_UIC_DME_ERROR = (1 << 5), /* DME error */ }; #define ufshcd_set_eh_in_progress(h) \ ((h)->eh_flags |= UFSHCD_EH_IN_PROGRESS) #define ufshcd_eh_in_progress(h) \ ((h)->eh_flags & UFSHCD_EH_IN_PROGRESS) #define ufshcd_clear_eh_in_progress(h) \ ((h)->eh_flags &= ~UFSHCD_EH_IN_PROGRESS) #define ufshcd_set_ufs_dev_active(h) \ ((h)->curr_dev_pwr_mode = UFS_ACTIVE_PWR_MODE) #define ufshcd_set_ufs_dev_sleep(h) \ ((h)->curr_dev_pwr_mode = UFS_SLEEP_PWR_MODE) #define ufshcd_set_ufs_dev_poweroff(h) \ ((h)->curr_dev_pwr_mode = UFS_POWERDOWN_PWR_MODE) #define ufshcd_is_ufs_dev_active(h) \ ((h)->curr_dev_pwr_mode == UFS_ACTIVE_PWR_MODE) #define ufshcd_is_ufs_dev_sleep(h) \ ((h)->curr_dev_pwr_mode == UFS_SLEEP_PWR_MODE) #define ufshcd_is_ufs_dev_poweroff(h) \ ((h)->curr_dev_pwr_mode == UFS_POWERDOWN_PWR_MODE) struct ufs_pm_lvl_states ufs_pm_lvl_states[] = { {UFS_ACTIVE_PWR_MODE, UIC_LINK_ACTIVE_STATE}, {UFS_ACTIVE_PWR_MODE, UIC_LINK_HIBERN8_STATE}, {UFS_SLEEP_PWR_MODE, UIC_LINK_ACTIVE_STATE}, {UFS_SLEEP_PWR_MODE, UIC_LINK_HIBERN8_STATE}, {UFS_POWERDOWN_PWR_MODE, UIC_LINK_HIBERN8_STATE}, {UFS_POWERDOWN_PWR_MODE, UIC_LINK_OFF_STATE}, }; static inline enum ufs_dev_pwr_mode ufs_get_pm_lvl_to_dev_pwr_mode(enum ufs_pm_level lvl) { return ufs_pm_lvl_states[lvl].dev_state; } static inline enum uic_link_state ufs_get_pm_lvl_to_link_pwr_state(enum ufs_pm_level lvl) { return ufs_pm_lvl_states[lvl].link_state; } static inline enum ufs_pm_level ufs_get_desired_pm_lvl_for_dev_link_state(enum ufs_dev_pwr_mode dev_state, enum uic_link_state link_state) { enum ufs_pm_level lvl; for (lvl = UFS_PM_LVL_0; lvl < UFS_PM_LVL_MAX; lvl++) { if ((ufs_pm_lvl_states[lvl].dev_state == dev_state) && (ufs_pm_lvl_states[lvl].link_state == link_state)) return lvl; } /* if no match found, return the level 0 */ return UFS_PM_LVL_0; } static struct ufs_dev_fix ufs_fixups[] = { /* UFS cards deviations table */ UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL, UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM), UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL, UFS_DEVICE_NO_VCCQ), UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL, UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS), UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL, UFS_DEVICE_NO_FASTAUTO), UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL, UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE), UFS_FIX(UFS_VENDOR_TOSHIBA, UFS_ANY_MODEL, UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM), UFS_FIX(UFS_VENDOR_TOSHIBA, "THGLF2G9C8KBADG", UFS_DEVICE_QUIRK_PA_TACTIVATE), UFS_FIX(UFS_VENDOR_TOSHIBA, "THGLF2G9D8KBADG", UFS_DEVICE_QUIRK_PA_TACTIVATE), UFS_FIX(UFS_VENDOR_SKHYNIX, UFS_ANY_MODEL, UFS_DEVICE_NO_VCCQ), UFS_FIX(UFS_VENDOR_SKHYNIX, UFS_ANY_MODEL, UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME), UFS_FIX(UFS_VENDOR_SKHYNIX, "hB8aL1" /*H28U62301AMR*/, UFS_DEVICE_QUIRK_HOST_VS_DEBUGSAVECONFIGTIME), END_FIX }; static void ufshcd_tmc_handler(struct ufs_hba *hba); static void ufshcd_async_scan(void *data, async_cookie_t cookie); static int ufshcd_reset_and_restore(struct ufs_hba *hba); static int ufshcd_eh_host_reset_handler(struct scsi_cmnd *cmd); static int ufshcd_clear_tm_cmd(struct ufs_hba *hba, int tag); static void ufshcd_hba_exit(struct ufs_hba *hba); static int ufshcd_probe_hba(struct ufs_hba *hba); static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on, bool skip_ref_clk); static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on); static int ufshcd_set_vccq_rail_unused(struct ufs_hba *hba, bool unused); static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba); static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba); static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba); static int ufshcd_host_reset_and_restore(struct ufs_hba *hba); static void ufshcd_resume_clkscaling(struct ufs_hba *hba); static void ufshcd_suspend_clkscaling(struct ufs_hba *hba); static void __ufshcd_suspend_clkscaling(struct ufs_hba *hba); static int ufshcd_scale_clks(struct ufs_hba *hba, bool scale_up); static irqreturn_t ufshcd_intr(int irq, void *__hba); static int ufshcd_change_power_mode(struct ufs_hba *hba, struct ufs_pa_layer_attr *pwr_mode); static inline bool ufshcd_valid_tag(struct ufs_hba *hba, int tag) { return tag >= 0 && tag < hba->nutrs; } static inline int ufshcd_enable_irq(struct ufs_hba *hba) { int ret = 0; if (!hba->is_irq_enabled) { ret = request_irq(hba->irq, ufshcd_intr, IRQF_SHARED, UFSHCD, hba); if (ret) dev_err(hba->dev, "%s: request_irq failed, ret=%d\n", __func__, ret); hba->is_irq_enabled = true; } return ret; } static inline void ufshcd_disable_irq(struct ufs_hba *hba) { if (hba->is_irq_enabled) { free_irq(hba->irq, hba); hba->is_irq_enabled = false; } } static void ufshcd_scsi_unblock_requests(struct ufs_hba *hba) { if (atomic_dec_and_test(&hba->scsi_block_reqs_cnt)) scsi_unblock_requests(hba->host); } static void ufshcd_scsi_block_requests(struct ufs_hba *hba) { if (atomic_inc_return(&hba->scsi_block_reqs_cnt) == 1) scsi_block_requests(hba->host); } /* replace non-printable or non-ASCII characters with spaces */ static inline void ufshcd_remove_non_printable(char *val) { if (!val) return; if (*val < 0x20 || *val > 0x7e) *val = ' '; } static void ufshcd_add_cmd_upiu_trace(struct ufs_hba *hba, unsigned int tag, const char *str) { struct utp_upiu_req *rq = hba->lrb[tag].ucd_req_ptr; trace_ufshcd_upiu(dev_name(hba->dev), str, &rq->header, &rq->sc.cdb); } static void ufshcd_add_query_upiu_trace(struct ufs_hba *hba, unsigned int tag, const char *str) { struct utp_upiu_req *rq = hba->lrb[tag].ucd_req_ptr; trace_ufshcd_upiu(dev_name(hba->dev), str, &rq->header, &rq->qr); } static void ufshcd_add_tm_upiu_trace(struct ufs_hba *hba, unsigned int tag, const char *str) { int off = (int)tag - hba->nutrs; struct utp_task_req_desc *descp = &hba->utmrdl_base_addr[off]; trace_ufshcd_upiu(dev_name(hba->dev), str, &descp->req_header, &descp->input_param1); } static void ufshcd_add_command_trace(struct ufs_hba *hba, unsigned int tag, const char *str) { sector_t lba = -1; u8 opcode = 0; u32 intr, doorbell; struct ufshcd_lrb *lrbp = &hba->lrb[tag]; int transfer_len = -1; if (!trace_ufshcd_command_enabled()) { /* trace UPIU W/O tracing command */ if (lrbp->cmd) ufshcd_add_cmd_upiu_trace(hba, tag, str); return; } if (lrbp->cmd) { /* data phase exists */ /* trace UPIU also */ ufshcd_add_cmd_upiu_trace(hba, tag, str); opcode = (u8)(*lrbp->cmd->cmnd); if ((opcode == READ_10) || (opcode == WRITE_10)) { /* * Currently we only fully trace read(10) and write(10) * commands */ if (lrbp->cmd->request && lrbp->cmd->request->bio) lba = lrbp->cmd->request->bio->bi_iter.bi_sector; transfer_len = be32_to_cpu( lrbp->ucd_req_ptr->sc.exp_data_transfer_len); } } intr = ufshcd_readl(hba, REG_INTERRUPT_STATUS); doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); trace_ufshcd_command(dev_name(hba->dev), str, tag, doorbell, transfer_len, intr, lba, opcode); } static void ufshcd_print_clk_freqs(struct ufs_hba *hba) { struct ufs_clk_info *clki; struct list_head *head = &hba->clk_list_head; if (list_empty(head)) return; list_for_each_entry(clki, head, list) { if (!IS_ERR_OR_NULL(clki->clk) && clki->min_freq && clki->max_freq) dev_err(hba->dev, "clk: %s, rate: %u\n", clki->name, clki->curr_freq); } } static void ufshcd_print_uic_err_hist(struct ufs_hba *hba, struct ufs_uic_err_reg_hist *err_hist, char *err_name) { int i; for (i = 0; i < UIC_ERR_REG_HIST_LENGTH; i++) { int p = (i + err_hist->pos - 1) % UIC_ERR_REG_HIST_LENGTH; if (err_hist->reg[p] == 0) continue; dev_err(hba->dev, "%s[%d] = 0x%x at %lld us\n", err_name, i, err_hist->reg[p], ktime_to_us(err_hist->tstamp[p])); } } static void ufshcd_print_host_regs(struct ufs_hba *hba) { ufshcd_dump_regs(hba, 0, UFSHCI_REG_SPACE_SIZE, "host_regs: "); dev_err(hba->dev, "hba->ufs_version = 0x%x, hba->capabilities = 0x%x\n", hba->ufs_version, hba->capabilities); dev_err(hba->dev, "hba->outstanding_reqs = 0x%x, hba->outstanding_tasks = 0x%x\n", (u32)hba->outstanding_reqs, (u32)hba->outstanding_tasks); dev_err(hba->dev, "last_hibern8_exit_tstamp at %lld us, hibern8_exit_cnt = %d\n", ktime_to_us(hba->ufs_stats.last_hibern8_exit_tstamp), hba->ufs_stats.hibern8_exit_cnt); ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.pa_err, "pa_err"); ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.dl_err, "dl_err"); ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.nl_err, "nl_err"); ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.tl_err, "tl_err"); ufshcd_print_uic_err_hist(hba, &hba->ufs_stats.dme_err, "dme_err"); ufshcd_print_clk_freqs(hba); if (hba->vops && hba->vops->dbg_register_dump) hba->vops->dbg_register_dump(hba); } static void ufshcd_print_trs(struct ufs_hba *hba, unsigned long bitmap, bool pr_prdt) { struct ufshcd_lrb *lrbp; int prdt_length; int tag; for_each_set_bit(tag, &bitmap, hba->nutrs) { lrbp = &hba->lrb[tag]; dev_err(hba->dev, "UPIU[%d] - issue time %lld us\n", tag, ktime_to_us(lrbp->issue_time_stamp)); dev_err(hba->dev, "UPIU[%d] - complete time %lld us\n", tag, ktime_to_us(lrbp->compl_time_stamp)); dev_err(hba->dev, "UPIU[%d] - Transfer Request Descriptor phys@0x%llx\n", tag, (u64)lrbp->utrd_dma_addr); ufshcd_hex_dump("UPIU TRD: ", lrbp->utr_descriptor_ptr, sizeof(struct utp_transfer_req_desc)); dev_err(hba->dev, "UPIU[%d] - Request UPIU phys@0x%llx\n", tag, (u64)lrbp->ucd_req_dma_addr); ufshcd_hex_dump("UPIU REQ: ", lrbp->ucd_req_ptr, sizeof(struct utp_upiu_req)); dev_err(hba->dev, "UPIU[%d] - Response UPIU phys@0x%llx\n", tag, (u64)lrbp->ucd_rsp_dma_addr); ufshcd_hex_dump("UPIU RSP: ", lrbp->ucd_rsp_ptr, sizeof(struct utp_upiu_rsp)); prdt_length = le16_to_cpu( lrbp->utr_descriptor_ptr->prd_table_length); dev_err(hba->dev, "UPIU[%d] - PRDT - %d entries phys@0x%llx\n", tag, prdt_length, (u64)lrbp->ucd_prdt_dma_addr); if (pr_prdt) ufshcd_hex_dump("UPIU PRDT: ", lrbp->ucd_prdt_ptr, sizeof(struct ufshcd_sg_entry) * prdt_length); } } static void ufshcd_print_tmrs(struct ufs_hba *hba, unsigned long bitmap) { int tag; for_each_set_bit(tag, &bitmap, hba->nutmrs) { struct utp_task_req_desc *tmrdp = &hba->utmrdl_base_addr[tag]; dev_err(hba->dev, "TM[%d] - Task Management Header\n", tag); ufshcd_hex_dump("", tmrdp, sizeof(*tmrdp)); } } static void ufshcd_print_host_state(struct ufs_hba *hba) { dev_err(hba->dev, "UFS Host state=%d\n", hba->ufshcd_state); dev_err(hba->dev, "lrb in use=0x%lx, outstanding reqs=0x%lx tasks=0x%lx\n", hba->lrb_in_use, hba->outstanding_reqs, hba->outstanding_tasks); dev_err(hba->dev, "saved_err=0x%x, saved_uic_err=0x%x\n", hba->saved_err, hba->saved_uic_err); dev_err(hba->dev, "Device power mode=%d, UIC link state=%d\n", hba->curr_dev_pwr_mode, hba->uic_link_state); dev_err(hba->dev, "PM in progress=%d, sys. suspended=%d\n", hba->pm_op_in_progress, hba->is_sys_suspended); dev_err(hba->dev, "Auto BKOPS=%d, Host self-block=%d\n", hba->auto_bkops_enabled, hba->host->host_self_blocked); dev_err(hba->dev, "Clk gate=%d\n", hba->clk_gating.state); dev_err(hba->dev, "error handling flags=0x%x, req. abort count=%d\n", hba->eh_flags, hba->req_abort_count); dev_err(hba->dev, "Host capabilities=0x%x, caps=0x%x\n", hba->capabilities, hba->caps); dev_err(hba->dev, "quirks=0x%x, dev. quirks=0x%x\n", hba->quirks, hba->dev_quirks); } /** * ufshcd_print_pwr_info - print power params as saved in hba * power info * @hba: per-adapter instance */ static void ufshcd_print_pwr_info(struct ufs_hba *hba) { static const char * const names[] = { "INVALID MODE", "FAST MODE", "SLOW_MODE", "INVALID MODE", "FASTAUTO_MODE", "SLOWAUTO_MODE", "INVALID MODE", }; dev_err(hba->dev, "%s:[RX, TX]: gear=[%d, %d], lane[%d, %d], pwr[%s, %s], rate = %d\n", __func__, hba->pwr_info.gear_rx, hba->pwr_info.gear_tx, hba->pwr_info.lane_rx, hba->pwr_info.lane_tx, names[hba->pwr_info.pwr_rx], names[hba->pwr_info.pwr_tx], hba->pwr_info.hs_rate); } /* * ufshcd_wait_for_register - wait for register value to change * @hba - per-adapter interface * @reg - mmio register offset * @mask - mask to apply to read register value * @val - wait condition * @interval_us - polling interval in microsecs * @timeout_ms - timeout in millisecs * @can_sleep - perform sleep or just spin * * Returns -ETIMEDOUT on error, zero on success */ int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask, u32 val, unsigned long interval_us, unsigned long timeout_ms, bool can_sleep) { int err = 0; unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); /* ignore bits that we don't intend to wait on */ val = val & mask; while ((ufshcd_readl(hba, reg) & mask) != val) { if (can_sleep) usleep_range(interval_us, interval_us + 50); else udelay(interval_us); if (time_after(jiffies, timeout)) { if ((ufshcd_readl(hba, reg) & mask) != val) err = -ETIMEDOUT; break; } } return err; } /** * ufshcd_get_intr_mask - Get the interrupt bit mask * @hba: Pointer to adapter instance * * Returns interrupt bit mask per version */ static inline u32 ufshcd_get_intr_mask(struct ufs_hba *hba) { u32 intr_mask = 0; switch (hba->ufs_version) { case UFSHCI_VERSION_10: intr_mask = INTERRUPT_MASK_ALL_VER_10; break; case UFSHCI_VERSION_11: case UFSHCI_VERSION_20: intr_mask = INTERRUPT_MASK_ALL_VER_11; break; case UFSHCI_VERSION_21: default: intr_mask = INTERRUPT_MASK_ALL_VER_21; break; } return intr_mask; } /** * ufshcd_get_ufs_version - Get the UFS version supported by the HBA * @hba: Pointer to adapter instance * * Returns UFSHCI version supported by the controller */ static inline u32 ufshcd_get_ufs_version(struct ufs_hba *hba) { if (hba->quirks & UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION) return ufshcd_vops_get_ufs_hci_version(hba); return ufshcd_readl(hba, REG_UFS_VERSION); } /** * ufshcd_is_device_present - Check if any device connected to * the host controller * @hba: pointer to adapter instance * * Returns true if device present, false if no device detected */ static inline bool ufshcd_is_device_present(struct ufs_hba *hba) { return (ufshcd_readl(hba, REG_CONTROLLER_STATUS) & DEVICE_PRESENT) ? true : false; } /** * ufshcd_get_tr_ocs - Get the UTRD Overall Command Status * @lrbp: pointer to local command reference block * * This function is used to get the OCS field from UTRD * Returns the OCS field in the UTRD */ static inline int ufshcd_get_tr_ocs(struct ufshcd_lrb *lrbp) { return le32_to_cpu(lrbp->utr_descriptor_ptr->header.dword_2) & MASK_OCS; } /** * ufshcd_get_tm_free_slot - get a free slot for task management request * @hba: per adapter instance * @free_slot: pointer to variable with available slot value * * Get a free tag and lock it until ufshcd_put_tm_slot() is called. * Returns 0 if free slot is not available, else return 1 with tag value * in @free_slot. */ static bool ufshcd_get_tm_free_slot(struct ufs_hba *hba, int *free_slot) { int tag; bool ret = false; if (!free_slot) goto out; do { tag = find_first_zero_bit(&hba->tm_slots_in_use, hba->nutmrs); if (tag >= hba->nutmrs) goto out; } while (test_and_set_bit_lock(tag, &hba->tm_slots_in_use)); *free_slot = tag; ret = true; out: return ret; } static inline void ufshcd_put_tm_slot(struct ufs_hba *hba, int slot) { clear_bit_unlock(slot, &hba->tm_slots_in_use); } /** * ufshcd_utrl_clear - Clear a bit in UTRLCLR register * @hba: per adapter instance * @pos: position of the bit to be cleared */ static inline void ufshcd_utrl_clear(struct ufs_hba *hba, u32 pos) { if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR) ufshcd_writel(hba, (1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR); else ufshcd_writel(hba, ~(1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR); } /** * ufshcd_utmrl_clear - Clear a bit in UTRMLCLR register * @hba: per adapter instance * @pos: position of the bit to be cleared */ static inline void ufshcd_utmrl_clear(struct ufs_hba *hba, u32 pos) { if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR) ufshcd_writel(hba, (1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); else ufshcd_writel(hba, ~(1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); } /** * ufshcd_outstanding_req_clear - Clear a bit in outstanding request field * @hba: per adapter instance * @tag: position of the bit to be cleared */ static inline void ufshcd_outstanding_req_clear(struct ufs_hba *hba, int tag) { __clear_bit(tag, &hba->outstanding_reqs); } /** * ufshcd_get_lists_status - Check UCRDY, UTRLRDY and UTMRLRDY * @reg: Register value of host controller status * * Returns integer, 0 on Success and positive value if failed */ static inline int ufshcd_get_lists_status(u32 reg) { return !((reg & UFSHCD_STATUS_READY) == UFSHCD_STATUS_READY); } /** * ufshcd_get_uic_cmd_result - Get the UIC command result * @hba: Pointer to adapter instance * * This function gets the result of UIC command completion * Returns 0 on success, non zero value on error */ static inline int ufshcd_get_uic_cmd_result(struct ufs_hba *hba) { return ufshcd_readl(hba, REG_UIC_COMMAND_ARG_2) & MASK_UIC_COMMAND_RESULT; } /** * ufshcd_get_dme_attr_val - Get the value of attribute returned by UIC command * @hba: Pointer to adapter instance * * This function gets UIC command argument3 * Returns 0 on success, non zero value on error */ static inline u32 ufshcd_get_dme_attr_val(struct ufs_hba *hba) { return ufshcd_readl(hba, REG_UIC_COMMAND_ARG_3); } /** * ufshcd_get_req_rsp - returns the TR response transaction type * @ucd_rsp_ptr: pointer to response UPIU */ static inline int ufshcd_get_req_rsp(struct utp_upiu_rsp *ucd_rsp_ptr) { return be32_to_cpu(ucd_rsp_ptr->header.dword_0) >> 24; } /** * ufshcd_get_rsp_upiu_result - Get the result from response UPIU * @ucd_rsp_ptr: pointer to response UPIU * * This function gets the response status and scsi_status from response UPIU * Returns the response result code. */ static inline int ufshcd_get_rsp_upiu_result(struct utp_upiu_rsp *ucd_rsp_ptr) { return be32_to_cpu(ucd_rsp_ptr->header.dword_1) & MASK_RSP_UPIU_RESULT; } /* * ufshcd_get_rsp_upiu_data_seg_len - Get the data segment length * from response UPIU * @ucd_rsp_ptr: pointer to response UPIU * * Return the data segment length. */ static inline unsigned int ufshcd_get_rsp_upiu_data_seg_len(struct utp_upiu_rsp *ucd_rsp_ptr) { return be32_to_cpu(ucd_rsp_ptr->header.dword_2) & MASK_RSP_UPIU_DATA_SEG_LEN; } /** * ufshcd_is_exception_event - Check if the device raised an exception event * @ucd_rsp_ptr: pointer to response UPIU * * The function checks if the device raised an exception event indicated in * the Device Information field of response UPIU. * * Returns true if exception is raised, false otherwise. */ static inline bool ufshcd_is_exception_event(struct utp_upiu_rsp *ucd_rsp_ptr) { return be32_to_cpu(ucd_rsp_ptr->header.dword_2) & MASK_RSP_EXCEPTION_EVENT ? true : false; } /** * ufshcd_reset_intr_aggr - Reset interrupt aggregation values. * @hba: per adapter instance */ static inline void ufshcd_reset_intr_aggr(struct ufs_hba *hba) { ufshcd_writel(hba, INT_AGGR_ENABLE | INT_AGGR_COUNTER_AND_TIMER_RESET, REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL); } /** * ufshcd_config_intr_aggr - Configure interrupt aggregation values. * @hba: per adapter instance * @cnt: Interrupt aggregation counter threshold * @tmout: Interrupt aggregation timeout value */ static inline void ufshcd_config_intr_aggr(struct ufs_hba *hba, u8 cnt, u8 tmout) { ufshcd_writel(hba, INT_AGGR_ENABLE | INT_AGGR_PARAM_WRITE | INT_AGGR_COUNTER_THLD_VAL(cnt) | INT_AGGR_TIMEOUT_VAL(tmout), REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL); } /** * ufshcd_disable_intr_aggr - Disables interrupt aggregation. * @hba: per adapter instance */ static inline void ufshcd_disable_intr_aggr(struct ufs_hba *hba) { ufshcd_writel(hba, 0, REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL); } /** * ufshcd_enable_run_stop_reg - Enable run-stop registers, * When run-stop registers are set to 1, it indicates the * host controller that it can process the requests * @hba: per adapter instance */ static void ufshcd_enable_run_stop_reg(struct ufs_hba *hba) { ufshcd_writel(hba, UTP_TASK_REQ_LIST_RUN_STOP_BIT, REG_UTP_TASK_REQ_LIST_RUN_STOP); ufshcd_writel(hba, UTP_TRANSFER_REQ_LIST_RUN_STOP_BIT, REG_UTP_TRANSFER_REQ_LIST_RUN_STOP); } /** * ufshcd_hba_start - Start controller initialization sequence * @hba: per adapter instance */ static inline void ufshcd_hba_start(struct ufs_hba *hba) { ufshcd_writel(hba, CONTROLLER_ENABLE, REG_CONTROLLER_ENABLE); } /** * ufshcd_is_hba_active - Get controller state * @hba: per adapter instance * * Returns false if controller is active, true otherwise */ static inline bool ufshcd_is_hba_active(struct ufs_hba *hba) { return (ufshcd_readl(hba, REG_CONTROLLER_ENABLE) & CONTROLLER_ENABLE) ? false : true; } u32 ufshcd_get_local_unipro_ver(struct ufs_hba *hba) { /* HCI version 1.0 and 1.1 supports UniPro 1.41 */ if ((hba->ufs_version == UFSHCI_VERSION_10) || (hba->ufs_version == UFSHCI_VERSION_11)) return UFS_UNIPRO_VER_1_41; else return UFS_UNIPRO_VER_1_6; } EXPORT_SYMBOL(ufshcd_get_local_unipro_ver); static bool ufshcd_is_unipro_pa_params_tuning_req(struct ufs_hba *hba) { /* * If both host and device support UniPro ver1.6 or later, PA layer * parameters tuning happens during link startup itself. * * We can manually tune PA layer parameters if either host or device * doesn't support UniPro ver 1.6 or later. But to keep manual tuning * logic simple, we will only do manual tuning if local unipro version * doesn't support ver1.6 or later. */ if (ufshcd_get_local_unipro_ver(hba) < UFS_UNIPRO_VER_1_6) return true; else return false; } static int ufshcd_scale_clks(struct ufs_hba *hba, bool scale_up) { int ret = 0; struct ufs_clk_info *clki; struct list_head *head = &hba->clk_list_head; ktime_t start = ktime_get(); bool clk_state_changed = false; if (list_empty(head)) goto out; ret = ufshcd_vops_clk_scale_notify(hba, scale_up, PRE_CHANGE); if (ret) return ret; list_for_each_entry(clki, head, list) { if (!IS_ERR_OR_NULL(clki->clk)) { if (scale_up && clki->max_freq) { if (clki->curr_freq == clki->max_freq) continue; clk_state_changed = true; ret = clk_set_rate(clki->clk, clki->max_freq); if (ret) { dev_err(hba->dev, "%s: %s clk set rate(%dHz) failed, %d\n", __func__, clki->name, clki->max_freq, ret); break; } trace_ufshcd_clk_scaling(dev_name(hba->dev), "scaled up", clki->name, clki->curr_freq, clki->max_freq); clki->curr_freq = clki->max_freq; } else if (!scale_up && clki->min_freq) { if (clki->curr_freq == clki->min_freq) continue; clk_state_changed = true; ret = clk_set_rate(clki->clk, clki->min_freq); if (ret) { dev_err(hba->dev, "%s: %s clk set rate(%dHz) failed, %d\n", __func__, clki->name, clki->min_freq, ret); break; } trace_ufshcd_clk_scaling(dev_name(hba->dev), "scaled down", clki->name, clki->curr_freq, clki->min_freq); clki->curr_freq = clki->min_freq; } } dev_dbg(hba->dev, "%s: clk: %s, rate: %lu\n", __func__, clki->name, clk_get_rate(clki->clk)); } ret = ufshcd_vops_clk_scale_notify(hba, scale_up, POST_CHANGE); out: if (clk_state_changed) trace_ufshcd_profile_clk_scaling(dev_name(hba->dev), (scale_up ? "up" : "down"), ktime_to_us(ktime_sub(ktime_get(), start)), ret); return ret; } /** * ufshcd_is_devfreq_scaling_required - check if scaling is required or not * @hba: per adapter instance * @scale_up: True if scaling up and false if scaling down * * Returns true if scaling is required, false otherwise. */ static bool ufshcd_is_devfreq_scaling_required(struct ufs_hba *hba, bool scale_up) { struct ufs_clk_info *clki; struct list_head *head = &hba->clk_list_head; if (list_empty(head)) return false; list_for_each_entry(clki, head, list) { if (!IS_ERR_OR_NULL(clki->clk)) { if (scale_up && clki->max_freq) { if (clki->curr_freq == clki->max_freq) continue; return true; } else if (!scale_up && clki->min_freq) { if (clki->curr_freq == clki->min_freq) continue; return true; } } } return false; } static int ufshcd_wait_for_doorbell_clr(struct ufs_hba *hba, u64 wait_timeout_us) { unsigned long flags; int ret = 0; u32 tm_doorbell; u32 tr_doorbell; bool timeout = false, do_last_check = false; ktime_t start; ufshcd_hold(hba, false); spin_lock_irqsave(hba->host->host_lock, flags); /* * Wait for all the outstanding tasks/transfer requests. * Verify by checking the doorbell registers are clear. */ start = ktime_get(); do { if (hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL) { ret = -EBUSY; goto out; } tm_doorbell = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL); tr_doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); if (!tm_doorbell && !tr_doorbell) { timeout = false; break; } else if (do_last_check) { break; } spin_unlock_irqrestore(hba->host->host_lock, flags); schedule(); if (ktime_to_us(ktime_sub(ktime_get(), start)) > wait_timeout_us) { timeout = true; /* * We might have scheduled out for long time so make * sure to check if doorbells are cleared by this time * or not. */ do_last_check = true; } spin_lock_irqsave(hba->host->host_lock, flags); } while (tm_doorbell || tr_doorbell); if (timeout) { dev_err(hba->dev, "%s: timedout waiting for doorbell to clear (tm=0x%x, tr=0x%x)\n", __func__, tm_doorbell, tr_doorbell); ret = -EBUSY; } out: spin_unlock_irqrestore(hba->host->host_lock, flags); ufshcd_release(hba); return ret; } /** * ufshcd_scale_gear - scale up/down UFS gear * @hba: per adapter instance * @scale_up: True for scaling up gear and false for scaling down * * Returns 0 for success, * Returns -EBUSY if scaling can't happen at this time * Returns non-zero for any other errors */ static int ufshcd_scale_gear(struct ufs_hba *hba, bool scale_up) { #define UFS_MIN_GEAR_TO_SCALE_DOWN UFS_HS_G1 int ret = 0; struct ufs_pa_layer_attr new_pwr_info; if (scale_up) { memcpy(&new_pwr_info, &hba->clk_scaling.saved_pwr_info.info, sizeof(struct ufs_pa_layer_attr)); } else { memcpy(&new_pwr_info, &hba->pwr_info, sizeof(struct ufs_pa_layer_attr)); if (hba->pwr_info.gear_tx > UFS_MIN_GEAR_TO_SCALE_DOWN || hba->pwr_info.gear_rx > UFS_MIN_GEAR_TO_SCALE_DOWN) { /* save the current power mode */ memcpy(&hba->clk_scaling.saved_pwr_info.info, &hba->pwr_info, sizeof(struct ufs_pa_layer_attr)); /* scale down gear */ new_pwr_info.gear_tx = UFS_MIN_GEAR_TO_SCALE_DOWN; new_pwr_info.gear_rx = UFS_MIN_GEAR_TO_SCALE_DOWN; } } /* check if the power mode needs to be changed or not? */ ret = ufshcd_change_power_mode(hba, &new_pwr_info); if (ret) dev_err(hba->dev, "%s: failed err %d, old gear: (tx %d rx %d), new gear: (tx %d rx %d)", __func__, ret, hba->pwr_info.gear_tx, hba->pwr_info.gear_rx, new_pwr_info.gear_tx, new_pwr_info.gear_rx); return ret; } static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba) { #define DOORBELL_CLR_TOUT_US (1000 * 1000) /* 1 sec */ int ret = 0; /* * make sure that there are no outstanding requests when * clock scaling is in progress */ ufshcd_scsi_block_requests(hba); down_write(&hba->clk_scaling_lock); if (ufshcd_wait_for_doorbell_clr(hba, DOORBELL_CLR_TOUT_US)) { ret = -EBUSY; up_write(&hba->clk_scaling_lock); ufshcd_scsi_unblock_requests(hba); } return ret; } static void ufshcd_clock_scaling_unprepare(struct ufs_hba *hba) { up_write(&hba->clk_scaling_lock); ufshcd_scsi_unblock_requests(hba); } /** * ufshcd_devfreq_scale - scale up/down UFS clocks and gear * @hba: per adapter instance * @scale_up: True for scaling up and false for scalin down * * Returns 0 for success, * Returns -EBUSY if scaling can't happen at this time * Returns non-zero for any other errors */ static int ufshcd_devfreq_scale(struct ufs_hba *hba, bool scale_up) { int ret = 0; /* let's not get into low power until clock scaling is completed */ ufshcd_hold(hba, false); ret = ufshcd_clock_scaling_prepare(hba); if (ret) return ret; /* scale down the gear before scaling down clocks */ if (!scale_up) { ret = ufshcd_scale_gear(hba, false); if (ret) goto out; } ret = ufshcd_scale_clks(hba, scale_up); if (ret) { if (!scale_up) ufshcd_scale_gear(hba, true); goto out; } /* scale up the gear after scaling up clocks */ if (scale_up) { ret = ufshcd_scale_gear(hba, true); if (ret) { ufshcd_scale_clks(hba, false); goto out; } } ret = ufshcd_vops_clk_scale_notify(hba, scale_up, POST_CHANGE); out: ufshcd_clock_scaling_unprepare(hba); ufshcd_release(hba); return ret; } static void ufshcd_clk_scaling_suspend_work(struct work_struct *work) { struct ufs_hba *hba = container_of(work, struct ufs_hba, clk_scaling.suspend_work); unsigned long irq_flags; spin_lock_irqsave(hba->host->host_lock, irq_flags); if (hba->clk_scaling.active_reqs || hba->clk_scaling.is_suspended) { spin_unlock_irqrestore(hba->host->host_lock, irq_flags); return; } hba->clk_scaling.is_suspended = true; spin_unlock_irqrestore(hba->host->host_lock, irq_flags); __ufshcd_suspend_clkscaling(hba); } static void ufshcd_clk_scaling_resume_work(struct work_struct *work) { struct ufs_hba *hba = container_of(work, struct ufs_hba, clk_scaling.resume_work); unsigned long irq_flags; spin_lock_irqsave(hba->host->host_lock, irq_flags); if (!hba->clk_scaling.is_suspended) { spin_unlock_irqrestore(hba->host->host_lock, irq_flags); return; } hba->clk_scaling.is_suspended = false; spin_unlock_irqrestore(hba->host->host_lock, irq_flags); devfreq_resume_device(hba->devfreq); } static int ufshcd_devfreq_target(struct device *dev, unsigned long *freq, u32 flags) { int ret = 0; struct ufs_hba *hba = dev_get_drvdata(dev); ktime_t start; bool scale_up, sched_clk_scaling_suspend_work = false; struct list_head *clk_list = &hba->clk_list_head; struct ufs_clk_info *clki; unsigned long irq_flags; if (!ufshcd_is_clkscaling_supported(hba)) return -EINVAL; spin_lock_irqsave(hba->host->host_lock, irq_flags); if (ufshcd_eh_in_progress(hba)) { spin_unlock_irqrestore(hba->host->host_lock, irq_flags); return 0; } if (!hba->clk_scaling.active_reqs) sched_clk_scaling_suspend_work = true; if (list_empty(clk_list)) { spin_unlock_irqrestore(hba->host->host_lock, irq_flags); goto out; } clki = list_first_entry(&hba->clk_list_head, struct ufs_clk_info, list); scale_up = (*freq == clki->max_freq) ? true : false; if (!ufshcd_is_devfreq_scaling_required(hba, scale_up)) { spin_unlock_irqrestore(hba->host->host_lock, irq_flags); ret = 0; goto out; /* no state change required */ } spin_unlock_irqrestore(hba->host->host_lock, irq_flags); start = ktime_get(); ret = ufshcd_devfreq_scale(hba, scale_up); trace_ufshcd_profile_clk_scaling(dev_name(hba->dev), (scale_up ? "up" : "down"), ktime_to_us(ktime_sub(ktime_get(), start)), ret); out: if (sched_clk_scaling_suspend_work) queue_work(hba->clk_scaling.workq, &hba->clk_scaling.suspend_work); return ret; } static int ufshcd_devfreq_get_dev_status(struct device *dev, struct devfreq_dev_status *stat) { struct ufs_hba *hba = dev_get_drvdata(dev); struct ufs_clk_scaling *scaling = &hba->clk_scaling; unsigned long flags; if (!ufshcd_is_clkscaling_supported(hba)) return -EINVAL; memset(stat, 0, sizeof(*stat)); spin_lock_irqsave(hba->host->host_lock, flags); if (!scaling->window_start_t) goto start_window; if (scaling->is_busy_started) scaling->tot_busy_t += ktime_to_us(ktime_sub(ktime_get(), scaling->busy_start_t)); stat->total_time = jiffies_to_usecs((long)jiffies - (long)scaling->window_start_t); stat->busy_time = scaling->tot_busy_t; start_window: scaling->window_start_t = jiffies; scaling->tot_busy_t = 0; if (hba->outstanding_reqs) { scaling->busy_start_t = ktime_get(); scaling->is_busy_started = true; } else { scaling->busy_start_t = 0; scaling->is_busy_started = false; } spin_unlock_irqrestore(hba->host->host_lock, flags); return 0; } static struct devfreq_dev_profile ufs_devfreq_profile = { .polling_ms = 100, .target = ufshcd_devfreq_target, .get_dev_status = ufshcd_devfreq_get_dev_status, }; static int ufshcd_devfreq_init(struct ufs_hba *hba) { struct list_head *clk_list = &hba->clk_list_head; struct ufs_clk_info *clki; struct devfreq *devfreq; int ret; /* Skip devfreq if we don't have any clocks in the list */ if (list_empty(clk_list)) return 0; clki = list_first_entry(clk_list, struct ufs_clk_info, list); dev_pm_opp_add(hba->dev, clki->min_freq, 0); dev_pm_opp_add(hba->dev, clki->max_freq, 0); devfreq = devfreq_add_device(hba->dev, &ufs_devfreq_profile, DEVFREQ_GOV_SIMPLE_ONDEMAND, NULL); if (IS_ERR(devfreq)) { ret = PTR_ERR(devfreq); dev_err(hba->dev, "Unable to register with devfreq %d\n", ret); dev_pm_opp_remove(hba->dev, clki->min_freq); dev_pm_opp_remove(hba->dev, clki->max_freq); return ret; } hba->devfreq = devfreq; return 0; } static void ufshcd_devfreq_remove(struct ufs_hba *hba) { struct list_head *clk_list = &hba->clk_list_head; struct ufs_clk_info *clki; if (!hba->devfreq) return; devfreq_remove_device(hba->devfreq); hba->devfreq = NULL; clki = list_first_entry(clk_list, struct ufs_clk_info, list); dev_pm_opp_remove(hba->dev, clki->min_freq); dev_pm_opp_remove(hba->dev, clki->max_freq); } static void __ufshcd_suspend_clkscaling(struct ufs_hba *hba) { unsigned long flags; devfreq_suspend_device(hba->devfreq); spin_lock_irqsave(hba->host->host_lock, flags); hba->clk_scaling.window_start_t = 0; spin_unlock_irqrestore(hba->host->host_lock, flags); } static void ufshcd_suspend_clkscaling(struct ufs_hba *hba) { unsigned long flags; bool suspend = false; if (!ufshcd_is_clkscaling_supported(hba)) return; spin_lock_irqsave(hba->host->host_lock, flags); if (!hba->clk_scaling.is_suspended) { suspend = true; hba->clk_scaling.is_suspended = true; } spin_unlock_irqrestore(hba->host->host_lock, flags); if (suspend) __ufshcd_suspend_clkscaling(hba); } static void ufshcd_resume_clkscaling(struct ufs_hba *hba) { unsigned long flags; bool resume = false; if (!ufshcd_is_clkscaling_supported(hba)) return; spin_lock_irqsave(hba->host->host_lock, flags); if (hba->clk_scaling.is_suspended) { resume = true; hba->clk_scaling.is_suspended = false; } spin_unlock_irqrestore(hba->host->host_lock, flags); if (resume) devfreq_resume_device(hba->devfreq); } static ssize_t ufshcd_clkscale_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ufs_hba *hba = dev_get_drvdata(dev); return snprintf(buf, PAGE_SIZE, "%d\n", hba->clk_scaling.is_allowed); } static ssize_t ufshcd_clkscale_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ufs_hba *hba = dev_get_drvdata(dev); u32 value; int err; if (kstrtou32(buf, 0, &value)) return -EINVAL; value = !!value; if (value == hba->clk_scaling.is_allowed) goto out; pm_runtime_get_sync(hba->dev); ufshcd_hold(hba, false); cancel_work_sync(&hba->clk_scaling.suspend_work); cancel_work_sync(&hba->clk_scaling.resume_work); hba->clk_scaling.is_allowed = value; if (value) { ufshcd_resume_clkscaling(hba); } else { ufshcd_suspend_clkscaling(hba); err = ufshcd_devfreq_scale(hba, true); if (err) dev_err(hba->dev, "%s: failed to scale clocks up %d\n", __func__, err); } ufshcd_release(hba); pm_runtime_put_sync(hba->dev); out: return count; } static void ufshcd_clkscaling_init_sysfs(struct ufs_hba *hba) { hba->clk_scaling.enable_attr.show = ufshcd_clkscale_enable_show; hba->clk_scaling.enable_attr.store = ufshcd_clkscale_enable_store; sysfs_attr_init(&hba->clk_scaling.enable_attr.attr); hba->clk_scaling.enable_attr.attr.name = "clkscale_enable"; hba->clk_scaling.enable_attr.attr.mode = 0644; if (device_create_file(hba->dev, &hba->clk_scaling.enable_attr)) dev_err(hba->dev, "Failed to create sysfs for clkscale_enable\n"); } static void ufshcd_ungate_work(struct work_struct *work) { int ret; unsigned long flags; struct ufs_hba *hba = container_of(work, struct ufs_hba, clk_gating.ungate_work); cancel_delayed_work_sync(&hba->clk_gating.gate_work); spin_lock_irqsave(hba->host->host_lock, flags); if (hba->clk_gating.state == CLKS_ON) { spin_unlock_irqrestore(hba->host->host_lock, flags); goto unblock_reqs; } spin_unlock_irqrestore(hba->host->host_lock, flags); ufshcd_setup_clocks(hba, true); /* Exit from hibern8 */ if (ufshcd_can_hibern8_during_gating(hba)) { /* Prevent gating in this path */ hba->clk_gating.is_suspended = true; if (ufshcd_is_link_hibern8(hba)) { ret = ufshcd_uic_hibern8_exit(hba); if (ret) dev_err(hba->dev, "%s: hibern8 exit failed %d\n", __func__, ret); else ufshcd_set_link_active(hba); } hba->clk_gating.is_suspended = false; } unblock_reqs: ufshcd_scsi_unblock_requests(hba); } /** * ufshcd_hold - Enable clocks that were gated earlier due to ufshcd_release. * Also, exit from hibern8 mode and set the link as active. * @hba: per adapter instance * @async: This indicates whether caller should ungate clocks asynchronously. */ int ufshcd_hold(struct ufs_hba *hba, bool async) { int rc = 0; unsigned long flags; if (!ufshcd_is_clkgating_allowed(hba)) goto out; spin_lock_irqsave(hba->host->host_lock, flags); hba->clk_gating.active_reqs++; if (ufshcd_eh_in_progress(hba)) { spin_unlock_irqrestore(hba->host->host_lock, flags); return 0; } start: switch (hba->clk_gating.state) { case CLKS_ON: /* * Wait for the ungate work to complete if in progress. * Though the clocks may be in ON state, the link could * still be in hibner8 state if hibern8 is allowed * during clock gating. * Make sure we exit hibern8 state also in addition to * clocks being ON. */ if (ufshcd_can_hibern8_during_gating(hba) && ufshcd_is_link_hibern8(hba)) { spin_unlock_irqrestore(hba->host->host_lock, flags); flush_work(&hba->clk_gating.ungate_work); spin_lock_irqsave(hba->host->host_lock, flags); goto start; } break; case REQ_CLKS_OFF: if (cancel_delayed_work(&hba->clk_gating.gate_work)) { hba->clk_gating.state = CLKS_ON; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); break; } /* * If we are here, it means gating work is either done or * currently running. Hence, fall through to cancel gating * work and to enable clocks. */ case CLKS_OFF: ufshcd_scsi_block_requests(hba); hba->clk_gating.state = REQ_CLKS_ON; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); queue_work(hba->clk_gating.clk_gating_workq, &hba->clk_gating.ungate_work); /* * fall through to check if we should wait for this * work to be done or not. */ case REQ_CLKS_ON: if (async) { rc = -EAGAIN; hba->clk_gating.active_reqs--; break; } spin_unlock_irqrestore(hba->host->host_lock, flags); flush_work(&hba->clk_gating.ungate_work); /* Make sure state is CLKS_ON before returning */ spin_lock_irqsave(hba->host->host_lock, flags); goto start; default: dev_err(hba->dev, "%s: clk gating is in invalid state %d\n", __func__, hba->clk_gating.state); break; } spin_unlock_irqrestore(hba->host->host_lock, flags); out: return rc; } EXPORT_SYMBOL_GPL(ufshcd_hold); static void ufshcd_gate_work(struct work_struct *work) { struct ufs_hba *hba = container_of(work, struct ufs_hba, clk_gating.gate_work.work); unsigned long flags; spin_lock_irqsave(hba->host->host_lock, flags); /* * In case you are here to cancel this work the gating state * would be marked as REQ_CLKS_ON. In this case save time by * skipping the gating work and exit after changing the clock * state to CLKS_ON. */ if (hba->clk_gating.is_suspended || (hba->clk_gating.state == REQ_CLKS_ON)) { hba->clk_gating.state = CLKS_ON; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); goto rel_lock; } if (hba->clk_gating.active_reqs || hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL || hba->lrb_in_use || hba->outstanding_tasks || hba->active_uic_cmd || hba->uic_async_done) goto rel_lock; spin_unlock_irqrestore(hba->host->host_lock, flags); /* put the link into hibern8 mode before turning off clocks */ if (ufshcd_can_hibern8_during_gating(hba)) { if (ufshcd_uic_hibern8_enter(hba)) { hba->clk_gating.state = CLKS_ON; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); goto out; } ufshcd_set_link_hibern8(hba); } if (!ufshcd_is_link_active(hba)) ufshcd_setup_clocks(hba, false); else /* If link is active, device ref_clk can't be switched off */ __ufshcd_setup_clocks(hba, false, true); /* * In case you are here to cancel this work the gating state * would be marked as REQ_CLKS_ON. In this case keep the state * as REQ_CLKS_ON which would anyway imply that clocks are off * and a request to turn them on is pending. By doing this way, * we keep the state machine in tact and this would ultimately * prevent from doing cancel work multiple times when there are * new requests arriving before the current cancel work is done. */ spin_lock_irqsave(hba->host->host_lock, flags); if (hba->clk_gating.state == REQ_CLKS_OFF) { hba->clk_gating.state = CLKS_OFF; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); } rel_lock: spin_unlock_irqrestore(hba->host->host_lock, flags); out: return; } /* host lock must be held before calling this variant */ static void __ufshcd_release(struct ufs_hba *hba) { if (!ufshcd_is_clkgating_allowed(hba)) return; hba->clk_gating.active_reqs--; if (hba->clk_gating.active_reqs || hba->clk_gating.is_suspended || hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL || hba->lrb_in_use || hba->outstanding_tasks || hba->active_uic_cmd || hba->uic_async_done || ufshcd_eh_in_progress(hba)) return; hba->clk_gating.state = REQ_CLKS_OFF; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); queue_delayed_work(hba->clk_gating.clk_gating_workq, &hba->clk_gating.gate_work, msecs_to_jiffies(hba->clk_gating.delay_ms)); } void ufshcd_release(struct ufs_hba *hba) { unsigned long flags; spin_lock_irqsave(hba->host->host_lock, flags); __ufshcd_release(hba); spin_unlock_irqrestore(hba->host->host_lock, flags); } EXPORT_SYMBOL_GPL(ufshcd_release); static ssize_t ufshcd_clkgate_delay_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ufs_hba *hba = dev_get_drvdata(dev); return snprintf(buf, PAGE_SIZE, "%lu\n", hba->clk_gating.delay_ms); } static ssize_t ufshcd_clkgate_delay_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ufs_hba *hba = dev_get_drvdata(dev); unsigned long flags, value; if (kstrtoul(buf, 0, &value)) return -EINVAL; spin_lock_irqsave(hba->host->host_lock, flags); hba->clk_gating.delay_ms = value; spin_unlock_irqrestore(hba->host->host_lock, flags); return count; } static ssize_t ufshcd_clkgate_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ufs_hba *hba = dev_get_drvdata(dev); return snprintf(buf, PAGE_SIZE, "%d\n", hba->clk_gating.is_enabled); } static ssize_t ufshcd_clkgate_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ufs_hba *hba = dev_get_drvdata(dev); unsigned long flags; u32 value; if (kstrtou32(buf, 0, &value)) return -EINVAL; value = !!value; if (value == hba->clk_gating.is_enabled) goto out; if (value) { ufshcd_release(hba); } else { spin_lock_irqsave(hba->host->host_lock, flags); hba->clk_gating.active_reqs++; spin_unlock_irqrestore(hba->host->host_lock, flags); } hba->clk_gating.is_enabled = value; out: return count; } static void ufshcd_init_clk_scaling(struct ufs_hba *hba) { char wq_name[sizeof("ufs_clkscaling_00")]; if (!ufshcd_is_clkscaling_supported(hba)) return; INIT_WORK(&hba->clk_scaling.suspend_work, ufshcd_clk_scaling_suspend_work); INIT_WORK(&hba->clk_scaling.resume_work, ufshcd_clk_scaling_resume_work); snprintf(wq_name, sizeof(wq_name), "ufs_clkscaling_%d", hba->host->host_no); hba->clk_scaling.workq = create_singlethread_workqueue(wq_name); ufshcd_clkscaling_init_sysfs(hba); } static void ufshcd_exit_clk_scaling(struct ufs_hba *hba) { if (!ufshcd_is_clkscaling_supported(hba)) return; destroy_workqueue(hba->clk_scaling.workq); ufshcd_devfreq_remove(hba); } static void ufshcd_init_clk_gating(struct ufs_hba *hba) { char wq_name[sizeof("ufs_clk_gating_00")]; if (!ufshcd_is_clkgating_allowed(hba)) return; hba->clk_gating.delay_ms = 150; INIT_DELAYED_WORK(&hba->clk_gating.gate_work, ufshcd_gate_work); INIT_WORK(&hba->clk_gating.ungate_work, ufshcd_ungate_work); snprintf(wq_name, ARRAY_SIZE(wq_name), "ufs_clk_gating_%d", hba->host->host_no); hba->clk_gating.clk_gating_workq = alloc_ordered_workqueue(wq_name, WQ_MEM_RECLAIM); hba->clk_gating.is_enabled = true; hba->clk_gating.delay_attr.show = ufshcd_clkgate_delay_show; hba->clk_gating.delay_attr.store = ufshcd_clkgate_delay_store; sysfs_attr_init(&hba->clk_gating.delay_attr.attr); hba->clk_gating.delay_attr.attr.name = "clkgate_delay_ms"; hba->clk_gating.delay_attr.attr.mode = 0644; if (device_create_file(hba->dev, &hba->clk_gating.delay_attr)) dev_err(hba->dev, "Failed to create sysfs for clkgate_delay\n"); hba->clk_gating.enable_attr.show = ufshcd_clkgate_enable_show; hba->clk_gating.enable_attr.store = ufshcd_clkgate_enable_store; sysfs_attr_init(&hba->clk_gating.enable_attr.attr); hba->clk_gating.enable_attr.attr.name = "clkgate_enable"; hba->clk_gating.enable_attr.attr.mode = 0644; if (device_create_file(hba->dev, &hba->clk_gating.enable_attr)) dev_err(hba->dev, "Failed to create sysfs for clkgate_enable\n"); } static void ufshcd_exit_clk_gating(struct ufs_hba *hba) { if (!ufshcd_is_clkgating_allowed(hba)) return; device_remove_file(hba->dev, &hba->clk_gating.delay_attr); device_remove_file(hba->dev, &hba->clk_gating.enable_attr); cancel_work_sync(&hba->clk_gating.ungate_work); cancel_delayed_work_sync(&hba->clk_gating.gate_work); destroy_workqueue(hba->clk_gating.clk_gating_workq); } /* Must be called with host lock acquired */ static void ufshcd_clk_scaling_start_busy(struct ufs_hba *hba) { bool queue_resume_work = false; if (!ufshcd_is_clkscaling_supported(hba)) return; if (!hba->clk_scaling.active_reqs++) queue_resume_work = true; if (!hba->clk_scaling.is_allowed || hba->pm_op_in_progress) return; if (queue_resume_work) queue_work(hba->clk_scaling.workq, &hba->clk_scaling.resume_work); if (!hba->clk_scaling.window_start_t) { hba->clk_scaling.window_start_t = jiffies; hba->clk_scaling.tot_busy_t = 0; hba->clk_scaling.is_busy_started = false; } if (!hba->clk_scaling.is_busy_started) { hba->clk_scaling.busy_start_t = ktime_get(); hba->clk_scaling.is_busy_started = true; } } static void ufshcd_clk_scaling_update_busy(struct ufs_hba *hba) { struct ufs_clk_scaling *scaling = &hba->clk_scaling; if (!ufshcd_is_clkscaling_supported(hba)) return; if (!hba->outstanding_reqs && scaling->is_busy_started) { scaling->tot_busy_t += ktime_to_us(ktime_sub(ktime_get(), scaling->busy_start_t)); scaling->busy_start_t = 0; scaling->is_busy_started = false; } } /** * ufshcd_send_command - Send SCSI or device management commands * @hba: per adapter instance * @task_tag: Task tag of the command */ static inline void ufshcd_send_command(struct ufs_hba *hba, unsigned int task_tag) { hba->lrb[task_tag].issue_time_stamp = ktime_get(); hba->lrb[task_tag].compl_time_stamp = ktime_set(0, 0); ufshcd_clk_scaling_start_busy(hba); __set_bit(task_tag, &hba->outstanding_reqs); ufshcd_writel(hba, 1 << task_tag, REG_UTP_TRANSFER_REQ_DOOR_BELL); /* Make sure that doorbell is committed immediately */ wmb(); ufshcd_add_command_trace(hba, task_tag, "send"); } /** * ufshcd_copy_sense_data - Copy sense data in case of check condition * @lrbp: pointer to local reference block */ static inline void ufshcd_copy_sense_data(struct ufshcd_lrb *lrbp) { int len; if (lrbp->sense_buffer && ufshcd_get_rsp_upiu_data_seg_len(lrbp->ucd_rsp_ptr)) { int len_to_copy; len = be16_to_cpu(lrbp->ucd_rsp_ptr->sr.sense_data_len); len_to_copy = min_t(int, RESPONSE_UPIU_SENSE_DATA_LENGTH, len); memcpy(lrbp->sense_buffer, lrbp->ucd_rsp_ptr->sr.sense_data, min_t(int, len_to_copy, UFSHCD_REQ_SENSE_SIZE)); } } /** * ufshcd_copy_query_response() - Copy the Query Response and the data * descriptor * @hba: per adapter instance * @lrbp: pointer to local reference block */ static int ufshcd_copy_query_response(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) { struct ufs_query_res *query_res = &hba->dev_cmd.query.response; memcpy(&query_res->upiu_res, &lrbp->ucd_rsp_ptr->qr, QUERY_OSF_SIZE); /* Get the descriptor */ if (lrbp->ucd_rsp_ptr->qr.opcode == UPIU_QUERY_OPCODE_READ_DESC) { u8 *descp = (u8 *)lrbp->ucd_rsp_ptr + GENERAL_UPIU_REQUEST_SIZE; u16 resp_len; u16 buf_len; /* data segment length */ resp_len = be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_2) & MASK_QUERY_DATA_SEG_LEN; buf_len = be16_to_cpu( hba->dev_cmd.query.request.upiu_req.length); if (likely(buf_len >= resp_len)) { memcpy(hba->dev_cmd.query.descriptor, descp, resp_len); } else { dev_warn(hba->dev, "%s: Response size is bigger than buffer", __func__); return -EINVAL; } } return 0; } /** * ufshcd_hba_capabilities - Read controller capabilities * @hba: per adapter instance */ static inline void ufshcd_hba_capabilities(struct ufs_hba *hba) { hba->capabilities = ufshcd_readl(hba, REG_CONTROLLER_CAPABILITIES); /* nutrs and nutmrs are 0 based values */ hba->nutrs = (hba->capabilities & MASK_TRANSFER_REQUESTS_SLOTS) + 1; hba->nutmrs = ((hba->capabilities & MASK_TASK_MANAGEMENT_REQUEST_SLOTS) >> 16) + 1; } /** * ufshcd_ready_for_uic_cmd - Check if controller is ready * to accept UIC commands * @hba: per adapter instance * Return true on success, else false */ static inline bool ufshcd_ready_for_uic_cmd(struct ufs_hba *hba) { if (ufshcd_readl(hba, REG_CONTROLLER_STATUS) & UIC_COMMAND_READY) return true; else return false; } /** * ufshcd_get_upmcrs - Get the power mode change request status * @hba: Pointer to adapter instance * * This function gets the UPMCRS field of HCS register * Returns value of UPMCRS field */ static inline u8 ufshcd_get_upmcrs(struct ufs_hba *hba) { return (ufshcd_readl(hba, REG_CONTROLLER_STATUS) >> 8) & 0x7; } /** * ufshcd_dispatch_uic_cmd - Dispatch UIC commands to unipro layers * @hba: per adapter instance * @uic_cmd: UIC command * * Mutex must be held. */ static inline void ufshcd_dispatch_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) { WARN_ON(hba->active_uic_cmd); hba->active_uic_cmd = uic_cmd; /* Write Args */ ufshcd_writel(hba, uic_cmd->argument1, REG_UIC_COMMAND_ARG_1); ufshcd_writel(hba, uic_cmd->argument2, REG_UIC_COMMAND_ARG_2); ufshcd_writel(hba, uic_cmd->argument3, REG_UIC_COMMAND_ARG_3); /* Write UIC Cmd */ ufshcd_writel(hba, uic_cmd->command & COMMAND_OPCODE_MASK, REG_UIC_COMMAND); } /** * ufshcd_wait_for_uic_cmd - Wait complectioin of UIC command * @hba: per adapter instance * @uic_cmd: UIC command * * Must be called with mutex held. * Returns 0 only if success. */ static int ufshcd_wait_for_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) { int ret; unsigned long flags; if (wait_for_completion_timeout(&uic_cmd->done, msecs_to_jiffies(UIC_CMD_TIMEOUT))) ret = uic_cmd->argument2 & MASK_UIC_COMMAND_RESULT; else ret = -ETIMEDOUT; spin_lock_irqsave(hba->host->host_lock, flags); hba->active_uic_cmd = NULL; spin_unlock_irqrestore(hba->host->host_lock, flags); return ret; } /** * __ufshcd_send_uic_cmd - Send UIC commands and retrieve the result * @hba: per adapter instance * @uic_cmd: UIC command * @completion: initialize the completion only if this is set to true * * Identical to ufshcd_send_uic_cmd() expect mutex. Must be called * with mutex held and host_lock locked. * Returns 0 only if success. */ static int __ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd, bool completion) { if (!ufshcd_ready_for_uic_cmd(hba)) { dev_err(hba->dev, "Controller not ready to accept UIC commands\n"); return -EIO; } if (completion) init_completion(&uic_cmd->done); ufshcd_dispatch_uic_cmd(hba, uic_cmd); return 0; } /** * ufshcd_send_uic_cmd - Send UIC commands and retrieve the result * @hba: per adapter instance * @uic_cmd: UIC command * * Returns 0 only if success. */ int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) { int ret; unsigned long flags; ufshcd_hold(hba, false); mutex_lock(&hba->uic_cmd_mutex); ufshcd_add_delay_before_dme_cmd(hba); spin_lock_irqsave(hba->host->host_lock, flags); ret = __ufshcd_send_uic_cmd(hba, uic_cmd, true); spin_unlock_irqrestore(hba->host->host_lock, flags); if (!ret) ret = ufshcd_wait_for_uic_cmd(hba, uic_cmd); mutex_unlock(&hba->uic_cmd_mutex); ufshcd_release(hba); return ret; } /** * ufshcd_map_sg - Map scatter-gather list to prdt * @hba: per adapter instance * @lrbp: pointer to local reference block * * Returns 0 in case of success, non-zero value in case of failure */ static int ufshcd_map_sg(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) { struct ufshcd_sg_entry *prd_table; struct scatterlist *sg; struct scsi_cmnd *cmd; int sg_segments; int i; cmd = lrbp->cmd; sg_segments = scsi_dma_map(cmd); if (sg_segments < 0) return sg_segments; if (sg_segments) { if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN) lrbp->utr_descriptor_ptr->prd_table_length = cpu_to_le16((u16)(sg_segments * sizeof(struct ufshcd_sg_entry))); else lrbp->utr_descriptor_ptr->prd_table_length = cpu_to_le16((u16) (sg_segments)); prd_table = (struct ufshcd_sg_entry *)lrbp->ucd_prdt_ptr; scsi_for_each_sg(cmd, sg, sg_segments, i) { prd_table[i].size = cpu_to_le32(((u32) sg_dma_len(sg))-1); prd_table[i].base_addr = cpu_to_le32(lower_32_bits(sg->dma_address)); prd_table[i].upper_addr = cpu_to_le32(upper_32_bits(sg->dma_address)); prd_table[i].reserved = 0; } } else { lrbp->utr_descriptor_ptr->prd_table_length = 0; } return 0; } /** * ufshcd_enable_intr - enable interrupts * @hba: per adapter instance * @intrs: interrupt bits */ static void ufshcd_enable_intr(struct ufs_hba *hba, u32 intrs) { u32 set = ufshcd_readl(hba, REG_INTERRUPT_ENABLE); if (hba->ufs_version == UFSHCI_VERSION_10) { u32 rw; rw = set & INTERRUPT_MASK_RW_VER_10; set = rw | ((set ^ intrs) & intrs); } else { set |= intrs; } ufshcd_writel(hba, set, REG_INTERRUPT_ENABLE); } /** * ufshcd_disable_intr - disable interrupts * @hba: per adapter instance * @intrs: interrupt bits */ static void ufshcd_disable_intr(struct ufs_hba *hba, u32 intrs) { u32 set = ufshcd_readl(hba, REG_INTERRUPT_ENABLE); if (hba->ufs_version == UFSHCI_VERSION_10) { u32 rw; rw = (set & INTERRUPT_MASK_RW_VER_10) & ~(intrs & INTERRUPT_MASK_RW_VER_10); set = rw | ((set & intrs) & ~INTERRUPT_MASK_RW_VER_10); } else { set &= ~intrs; } ufshcd_writel(hba, set, REG_INTERRUPT_ENABLE); } /** * ufshcd_prepare_req_desc_hdr() - Fills the requests header * descriptor according to request * @lrbp: pointer to local reference block * @upiu_flags: flags required in the header * @cmd_dir: requests data direction */ static void ufshcd_prepare_req_desc_hdr(struct ufshcd_lrb *lrbp, u32 *upiu_flags, enum dma_data_direction cmd_dir) { struct utp_transfer_req_desc *req_desc = lrbp->utr_descriptor_ptr; u32 data_direction; u32 dword_0; if (cmd_dir == DMA_FROM_DEVICE) { data_direction = UTP_DEVICE_TO_HOST; *upiu_flags = UPIU_CMD_FLAGS_READ; } else if (cmd_dir == DMA_TO_DEVICE) { data_direction = UTP_HOST_TO_DEVICE; *upiu_flags = UPIU_CMD_FLAGS_WRITE; } else { data_direction = UTP_NO_DATA_TRANSFER; *upiu_flags = UPIU_CMD_FLAGS_NONE; } dword_0 = data_direction | (lrbp->command_type << UPIU_COMMAND_TYPE_OFFSET); if (lrbp->intr_cmd) dword_0 |= UTP_REQ_DESC_INT_CMD; /* Transfer request descriptor header fields */ req_desc->header.dword_0 = cpu_to_le32(dword_0); /* dword_1 is reserved, hence it is set to 0 */ req_desc->header.dword_1 = 0; /* * assigning invalid value for command status. Controller * updates OCS on command completion, with the command * status */ req_desc->header.dword_2 = cpu_to_le32(OCS_INVALID_COMMAND_STATUS); /* dword_3 is reserved, hence it is set to 0 */ req_desc->header.dword_3 = 0; req_desc->prd_table_length = 0; } /** * ufshcd_prepare_utp_scsi_cmd_upiu() - fills the utp_transfer_req_desc, * for scsi commands * @lrbp: local reference block pointer * @upiu_flags: flags */ static void ufshcd_prepare_utp_scsi_cmd_upiu(struct ufshcd_lrb *lrbp, u32 upiu_flags) { struct utp_upiu_req *ucd_req_ptr = lrbp->ucd_req_ptr; unsigned short cdb_len; /* command descriptor fields */ ucd_req_ptr->header.dword_0 = UPIU_HEADER_DWORD( UPIU_TRANSACTION_COMMAND, upiu_flags, lrbp->lun, lrbp->task_tag); ucd_req_ptr->header.dword_1 = UPIU_HEADER_DWORD( UPIU_COMMAND_SET_TYPE_SCSI, 0, 0, 0); /* Total EHS length and Data segment length will be zero */ ucd_req_ptr->header.dword_2 = 0; ucd_req_ptr->sc.exp_data_transfer_len = cpu_to_be32(lrbp->cmd->sdb.length); cdb_len = min_t(unsigned short, lrbp->cmd->cmd_len, UFS_CDB_SIZE); memset(ucd_req_ptr->sc.cdb, 0, UFS_CDB_SIZE); memcpy(ucd_req_ptr->sc.cdb, lrbp->cmd->cmnd, cdb_len); memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); } /** * ufshcd_prepare_utp_query_req_upiu() - fills the utp_transfer_req_desc, * for query requsts * @hba: UFS hba * @lrbp: local reference block pointer * @upiu_flags: flags */ static void ufshcd_prepare_utp_query_req_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp, u32 upiu_flags) { struct utp_upiu_req *ucd_req_ptr = lrbp->ucd_req_ptr; struct ufs_query *query = &hba->dev_cmd.query; u16 len = be16_to_cpu(query->request.upiu_req.length); /* Query request header */ ucd_req_ptr->header.dword_0 = UPIU_HEADER_DWORD( UPIU_TRANSACTION_QUERY_REQ, upiu_flags, lrbp->lun, lrbp->task_tag); ucd_req_ptr->header.dword_1 = UPIU_HEADER_DWORD( 0, query->request.query_func, 0, 0); /* Data segment length only need for WRITE_DESC */ if (query->request.upiu_req.opcode == UPIU_QUERY_OPCODE_WRITE_DESC) ucd_req_ptr->header.dword_2 = UPIU_HEADER_DWORD(0, 0, (len >> 8), (u8)len); else ucd_req_ptr->header.dword_2 = 0; /* Copy the Query Request buffer as is */ memcpy(&ucd_req_ptr->qr, &query->request.upiu_req, QUERY_OSF_SIZE); /* Copy the Descriptor */ if (query->request.upiu_req.opcode == UPIU_QUERY_OPCODE_WRITE_DESC) memcpy(ucd_req_ptr + 1, query->descriptor, len); memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); } static inline void ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb *lrbp) { struct utp_upiu_req *ucd_req_ptr = lrbp->ucd_req_ptr; memset(ucd_req_ptr, 0, sizeof(struct utp_upiu_req)); /* command descriptor fields */ ucd_req_ptr->header.dword_0 = UPIU_HEADER_DWORD( UPIU_TRANSACTION_NOP_OUT, 0, 0, lrbp->task_tag); /* clear rest of the fields of basic header */ ucd_req_ptr->header.dword_1 = 0; ucd_req_ptr->header.dword_2 = 0; memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); } /** * ufshcd_comp_devman_upiu - UFS Protocol Information Unit(UPIU) * for Device Management Purposes * @hba: per adapter instance * @lrbp: pointer to local reference block */ static int ufshcd_comp_devman_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) { u32 upiu_flags; int ret = 0; if ((hba->ufs_version == UFSHCI_VERSION_10) || (hba->ufs_version == UFSHCI_VERSION_11)) lrbp->command_type = UTP_CMD_TYPE_DEV_MANAGE; else lrbp->command_type = UTP_CMD_TYPE_UFS_STORAGE; ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags, DMA_NONE); if (hba->dev_cmd.type == DEV_CMD_TYPE_QUERY) ufshcd_prepare_utp_query_req_upiu(hba, lrbp, upiu_flags); else if (hba->dev_cmd.type == DEV_CMD_TYPE_NOP) ufshcd_prepare_utp_nop_upiu(lrbp); else ret = -EINVAL; return ret; } /** * ufshcd_comp_scsi_upiu - UFS Protocol Information Unit(UPIU) * for SCSI Purposes * @hba: per adapter instance * @lrbp: pointer to local reference block */ static int ufshcd_comp_scsi_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) { u32 upiu_flags; int ret = 0; if ((hba->ufs_version == UFSHCI_VERSION_10) || (hba->ufs_version == UFSHCI_VERSION_11)) lrbp->command_type = UTP_CMD_TYPE_SCSI; else lrbp->command_type = UTP_CMD_TYPE_UFS_STORAGE; if (likely(lrbp->cmd)) { ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags, lrbp->cmd->sc_data_direction); ufshcd_prepare_utp_scsi_cmd_upiu(lrbp, upiu_flags); } else { ret = -EINVAL; } return ret; } /** * ufshcd_upiu_wlun_to_scsi_wlun - maps UPIU W-LUN id to SCSI W-LUN ID * @upiu_wlun_id: UPIU W-LUN id * * Returns SCSI W-LUN id */ static inline u16 ufshcd_upiu_wlun_to_scsi_wlun(u8 upiu_wlun_id) { return (upiu_wlun_id & ~UFS_UPIU_WLUN_ID) | SCSI_W_LUN_BASE; } /** * ufshcd_queuecommand - main entry point for SCSI requests * @host: SCSI host pointer * @cmd: command from SCSI Midlayer * * Returns 0 for success, non-zero in case of failure */ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) { struct ufshcd_lrb *lrbp; struct ufs_hba *hba; unsigned long flags; int tag; int err = 0; hba = shost_priv(host); tag = cmd->request->tag; if (!ufshcd_valid_tag(hba, tag)) { dev_err(hba->dev, "%s: invalid command tag %d: cmd=0x%p, cmd->request=0x%p", __func__, tag, cmd, cmd->request); BUG(); } if (!down_read_trylock(&hba->clk_scaling_lock)) return SCSI_MLQUEUE_HOST_BUSY; spin_lock_irqsave(hba->host->host_lock, flags); switch (hba->ufshcd_state) { case UFSHCD_STATE_OPERATIONAL: break; case UFSHCD_STATE_EH_SCHEDULED: case UFSHCD_STATE_RESET: err = SCSI_MLQUEUE_HOST_BUSY; goto out_unlock; case UFSHCD_STATE_ERROR: set_host_byte(cmd, DID_ERROR); cmd->scsi_done(cmd); goto out_unlock; default: dev_WARN_ONCE(hba->dev, 1, "%s: invalid state %d\n", __func__, hba->ufshcd_state); set_host_byte(cmd, DID_BAD_TARGET); cmd->scsi_done(cmd); goto out_unlock; } /* if error handling is in progress, don't issue commands */ if (ufshcd_eh_in_progress(hba)) { set_host_byte(cmd, DID_ERROR); cmd->scsi_done(cmd); goto out_unlock; } spin_unlock_irqrestore(hba->host->host_lock, flags); hba->req_abort_count = 0; /* acquire the tag to make sure device cmds don't use it */ if (test_and_set_bit_lock(tag, &hba->lrb_in_use)) { /* * Dev manage command in progress, requeue the command. * Requeuing the command helps in cases where the request *may* * find different tag instead of waiting for dev manage command * completion. */ err = SCSI_MLQUEUE_HOST_BUSY; goto out; } err = ufshcd_hold(hba, true); if (err) { err = SCSI_MLQUEUE_HOST_BUSY; clear_bit_unlock(tag, &hba->lrb_in_use); goto out; } WARN_ON(hba->clk_gating.state != CLKS_ON); lrbp = &hba->lrb[tag]; WARN_ON(lrbp->cmd); lrbp->cmd = cmd; lrbp->sense_bufflen = UFSHCD_REQ_SENSE_SIZE; lrbp->sense_buffer = cmd->sense_buffer; lrbp->task_tag = tag; lrbp->lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun); lrbp->intr_cmd = !ufshcd_is_intr_aggr_allowed(hba) ? true : false; lrbp->req_abort_skip = false; ufshcd_comp_scsi_upiu(hba, lrbp); err = ufshcd_map_sg(hba, lrbp); if (err) { lrbp->cmd = NULL; clear_bit_unlock(tag, &hba->lrb_in_use); goto out; } /* Make sure descriptors are ready before ringing the doorbell */ wmb(); /* issue command to the controller */ spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_vops_setup_xfer_req(hba, tag, (lrbp->cmd ? true : false)); ufshcd_send_command(hba, tag); out_unlock: spin_unlock_irqrestore(hba->host->host_lock, flags); out: up_read(&hba->clk_scaling_lock); return err; } static int ufshcd_compose_dev_cmd(struct ufs_hba *hba, struct ufshcd_lrb *lrbp, enum dev_cmd_type cmd_type, int tag) { lrbp->cmd = NULL; lrbp->sense_bufflen = 0; lrbp->sense_buffer = NULL; lrbp->task_tag = tag; lrbp->lun = 0; /* device management cmd is not specific to any LUN */ lrbp->intr_cmd = true; /* No interrupt aggregation */ hba->dev_cmd.type = cmd_type; return ufshcd_comp_devman_upiu(hba, lrbp); } static int ufshcd_clear_cmd(struct ufs_hba *hba, int tag) { int err = 0; unsigned long flags; u32 mask = 1 << tag; /* clear outstanding transaction before retry */ spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_utrl_clear(hba, tag); spin_unlock_irqrestore(hba->host->host_lock, flags); /* * wait for for h/w to clear corresponding bit in door-bell. * max. wait is 1 sec. */ err = ufshcd_wait_for_register(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL, mask, ~mask, 1000, 1000, true); return err; } static int ufshcd_check_query_response(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) { struct ufs_query_res *query_res = &hba->dev_cmd.query.response; /* Get the UPIU response */ query_res->response = ufshcd_get_rsp_upiu_result(lrbp->ucd_rsp_ptr) >> UPIU_RSP_CODE_OFFSET; return query_res->response; } /** * ufshcd_dev_cmd_completion() - handles device management command responses * @hba: per adapter instance * @lrbp: pointer to local reference block */ static int ufshcd_dev_cmd_completion(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) { int resp; int err = 0; hba->ufs_stats.last_hibern8_exit_tstamp = ktime_set(0, 0); resp = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr); switch (resp) { case UPIU_TRANSACTION_NOP_IN: if (hba->dev_cmd.type != DEV_CMD_TYPE_NOP) { err = -EINVAL; dev_err(hba->dev, "%s: unexpected response %x\n", __func__, resp); } break; case UPIU_TRANSACTION_QUERY_RSP: err = ufshcd_check_query_response(hba, lrbp); if (!err) err = ufshcd_copy_query_response(hba, lrbp); break; case UPIU_TRANSACTION_REJECT_UPIU: /* TODO: handle Reject UPIU Response */ err = -EPERM; dev_err(hba->dev, "%s: Reject UPIU not fully implemented\n", __func__); break; default: err = -EINVAL; dev_err(hba->dev, "%s: Invalid device management cmd response: %x\n", __func__, resp); break; } return err; } static int ufshcd_wait_for_dev_cmd(struct ufs_hba *hba, struct ufshcd_lrb *lrbp, int max_timeout) { int err = 0; unsigned long time_left; unsigned long flags; time_left = wait_for_completion_timeout(hba->dev_cmd.complete, msecs_to_jiffies(max_timeout)); /* Make sure descriptors are ready before ringing the doorbell */ wmb(); spin_lock_irqsave(hba->host->host_lock, flags); hba->dev_cmd.complete = NULL; if (likely(time_left)) { err = ufshcd_get_tr_ocs(lrbp); if (!err) err = ufshcd_dev_cmd_completion(hba, lrbp); } spin_unlock_irqrestore(hba->host->host_lock, flags); if (!time_left) { err = -ETIMEDOUT; dev_dbg(hba->dev, "%s: dev_cmd request timedout, tag %d\n", __func__, lrbp->task_tag); if (!ufshcd_clear_cmd(hba, lrbp->task_tag)) /* successfully cleared the command, retry if needed */ err = -EAGAIN; /* * in case of an error, after clearing the doorbell, * we also need to clear the outstanding_request * field in hba */ ufshcd_outstanding_req_clear(hba, lrbp->task_tag); } return err; } /** * ufshcd_get_dev_cmd_tag - Get device management command tag * @hba: per-adapter instance * @tag_out: pointer to variable with available slot value * * Get a free slot and lock it until device management command * completes. * * Returns false if free slot is unavailable for locking, else * return true with tag value in @tag. */ static bool ufshcd_get_dev_cmd_tag(struct ufs_hba *hba, int *tag_out) { int tag; bool ret = false; unsigned long tmp; if (!tag_out) goto out; do { tmp = ~hba->lrb_in_use; tag = find_last_bit(&tmp, hba->nutrs); if (tag >= hba->nutrs) goto out; } while (test_and_set_bit_lock(tag, &hba->lrb_in_use)); *tag_out = tag; ret = true; out: return ret; } static inline void ufshcd_put_dev_cmd_tag(struct ufs_hba *hba, int tag) { clear_bit_unlock(tag, &hba->lrb_in_use); } /** * ufshcd_exec_dev_cmd - API for sending device management requests * @hba: UFS hba * @cmd_type: specifies the type (NOP, Query...) * @timeout: time in seconds * * NOTE: Since there is only one available tag for device management commands, * it is expected you hold the hba->dev_cmd.lock mutex. */ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba, enum dev_cmd_type cmd_type, int timeout) { struct ufshcd_lrb *lrbp; int err; int tag; struct completion wait; unsigned long flags; down_read(&hba->clk_scaling_lock); /* * Get free slot, sleep if slots are unavailable. * Even though we use wait_event() which sleeps indefinitely, * the maximum wait time is bounded by SCSI request timeout. */ wait_event(hba->dev_cmd.tag_wq, ufshcd_get_dev_cmd_tag(hba, &tag)); init_completion(&wait); lrbp = &hba->lrb[tag]; WARN_ON(lrbp->cmd); err = ufshcd_compose_dev_cmd(hba, lrbp, cmd_type, tag); if (unlikely(err)) goto out_put_tag; hba->dev_cmd.complete = &wait; ufshcd_add_query_upiu_trace(hba, tag, "query_send"); /* Make sure descriptors are ready before ringing the doorbell */ wmb(); spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_vops_setup_xfer_req(hba, tag, (lrbp->cmd ? true : false)); ufshcd_send_command(hba, tag); spin_unlock_irqrestore(hba->host->host_lock, flags); err = ufshcd_wait_for_dev_cmd(hba, lrbp, timeout); ufshcd_add_query_upiu_trace(hba, tag, err ? "query_complete_err" : "query_complete"); out_put_tag: ufshcd_put_dev_cmd_tag(hba, tag); wake_up(&hba->dev_cmd.tag_wq); up_read(&hba->clk_scaling_lock); return err; } /** * ufshcd_init_query() - init the query response and request parameters * @hba: per-adapter instance * @request: address of the request pointer to be initialized * @response: address of the response pointer to be initialized * @opcode: operation to perform * @idn: flag idn to access * @index: LU number to access * @selector: query/flag/descriptor further identification */ static inline void ufshcd_init_query(struct ufs_hba *hba, struct ufs_query_req **request, struct ufs_query_res **response, enum query_opcode opcode, u8 idn, u8 index, u8 selector) { *request = &hba->dev_cmd.query.request; *response = &hba->dev_cmd.query.response; memset(*request, 0, sizeof(struct ufs_query_req)); memset(*response, 0, sizeof(struct ufs_query_res)); (*request)->upiu_req.opcode = opcode; (*request)->upiu_req.idn = idn; (*request)->upiu_req.index = index; (*request)->upiu_req.selector = selector; } static int ufshcd_query_flag_retry(struct ufs_hba *hba, enum query_opcode opcode, enum flag_idn idn, bool *flag_res) { int ret; int retries; for (retries = 0; retries < QUERY_REQ_RETRIES; retries++) { ret = ufshcd_query_flag(hba, opcode, idn, flag_res); if (ret) dev_dbg(hba->dev, "%s: failed with error %d, retries %d\n", __func__, ret, retries); else break; } if (ret) dev_err(hba->dev, "%s: query attribute, opcode %d, idn %d, failed with error %d after %d retires\n", __func__, opcode, idn, ret, retries); return ret; } /** * ufshcd_query_flag() - API function for sending flag query requests * @hba: per-adapter instance * @opcode: flag query to perform * @idn: flag idn to access * @flag_res: the flag value after the query request completes * * Returns 0 for success, non-zero in case of failure */ int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode, enum flag_idn idn, bool *flag_res) { struct ufs_query_req *request = NULL; struct ufs_query_res *response = NULL; int err, index = 0, selector = 0; int timeout = QUERY_REQ_TIMEOUT; BUG_ON(!hba); ufshcd_hold(hba, false); mutex_lock(&hba->dev_cmd.lock); ufshcd_init_query(hba, &request, &response, opcode, idn, index, selector); switch (opcode) { case UPIU_QUERY_OPCODE_SET_FLAG: case UPIU_QUERY_OPCODE_CLEAR_FLAG: case UPIU_QUERY_OPCODE_TOGGLE_FLAG: request->query_func = UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST; break; case UPIU_QUERY_OPCODE_READ_FLAG: request->query_func = UPIU_QUERY_FUNC_STANDARD_READ_REQUEST; if (!flag_res) { /* No dummy reads */ dev_err(hba->dev, "%s: Invalid argument for read request\n", __func__); err = -EINVAL; goto out_unlock; } break; default: dev_err(hba->dev, "%s: Expected query flag opcode but got = %d\n", __func__, opcode); err = -EINVAL; goto out_unlock; } err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY, timeout); if (err) { dev_err(hba->dev, "%s: Sending flag query for idn %d failed, err = %d\n", __func__, idn, err); goto out_unlock; } if (flag_res) *flag_res = (be32_to_cpu(response->upiu_res.value) & MASK_QUERY_UPIU_FLAG_LOC) & 0x1; out_unlock: mutex_unlock(&hba->dev_cmd.lock); ufshcd_release(hba); return err; } /** * ufshcd_query_attr - API function for sending attribute requests * @hba: per-adapter instance * @opcode: attribute opcode * @idn: attribute idn to access * @index: index field * @selector: selector field * @attr_val: the attribute value after the query request completes * * Returns 0 for success, non-zero in case of failure */ int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode, enum attr_idn idn, u8 index, u8 selector, u32 *attr_val) { struct ufs_query_req *request = NULL; struct ufs_query_res *response = NULL; int err; BUG_ON(!hba); ufshcd_hold(hba, false); if (!attr_val) { dev_err(hba->dev, "%s: attribute value required for opcode 0x%x\n", __func__, opcode); err = -EINVAL; goto out; } mutex_lock(&hba->dev_cmd.lock); ufshcd_init_query(hba, &request, &response, opcode, idn, index, selector); switch (opcode) { case UPIU_QUERY_OPCODE_WRITE_ATTR: request->query_func = UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST; request->upiu_req.value = cpu_to_be32(*attr_val); break; case UPIU_QUERY_OPCODE_READ_ATTR: request->query_func = UPIU_QUERY_FUNC_STANDARD_READ_REQUEST; break; default: dev_err(hba->dev, "%s: Expected query attr opcode but got = 0x%.2x\n", __func__, opcode); err = -EINVAL; goto out_unlock; } err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY, QUERY_REQ_TIMEOUT); if (err) { dev_err(hba->dev, "%s: opcode 0x%.2x for idn %d failed, index %d, err = %d\n", __func__, opcode, idn, index, err); goto out_unlock; } *attr_val = be32_to_cpu(response->upiu_res.value); out_unlock: mutex_unlock(&hba->dev_cmd.lock); out: ufshcd_release(hba); return err; } /** * ufshcd_query_attr_retry() - API function for sending query * attribute with retries * @hba: per-adapter instance * @opcode: attribute opcode * @idn: attribute idn to access * @index: index field * @selector: selector field * @attr_val: the attribute value after the query request * completes * * Returns 0 for success, non-zero in case of failure */ static int ufshcd_query_attr_retry(struct ufs_hba *hba, enum query_opcode opcode, enum attr_idn idn, u8 index, u8 selector, u32 *attr_val) { int ret = 0; u32 retries; for (retries = QUERY_REQ_RETRIES; retries > 0; retries--) { ret = ufshcd_query_attr(hba, opcode, idn, index, selector, attr_val); if (ret) dev_dbg(hba->dev, "%s: failed with error %d, retries %d\n", __func__, ret, retries); else break; } if (ret) dev_err(hba->dev, "%s: query attribute, idn %d, failed with error %d after %d retires\n", __func__, idn, ret, QUERY_REQ_RETRIES); return ret; } static int __ufshcd_query_descriptor(struct ufs_hba *hba, enum query_opcode opcode, enum desc_idn idn, u8 index, u8 selector, u8 *desc_buf, int *buf_len) { struct ufs_query_req *request = NULL; struct ufs_query_res *response = NULL; int err; BUG_ON(!hba); ufshcd_hold(hba, false); if (!desc_buf) { dev_err(hba->dev, "%s: descriptor buffer required for opcode 0x%x\n", __func__, opcode); err = -EINVAL; goto out; } if (*buf_len < QUERY_DESC_MIN_SIZE || *buf_len > QUERY_DESC_MAX_SIZE) { dev_err(hba->dev, "%s: descriptor buffer size (%d) is out of range\n", __func__, *buf_len); err = -EINVAL; goto out; } mutex_lock(&hba->dev_cmd.lock); ufshcd_init_query(hba, &request, &response, opcode, idn, index, selector); hba->dev_cmd.query.descriptor = desc_buf; request->upiu_req.length = cpu_to_be16(*buf_len); switch (opcode) { case UPIU_QUERY_OPCODE_WRITE_DESC: request->query_func = UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST; break; case UPIU_QUERY_OPCODE_READ_DESC: request->query_func = UPIU_QUERY_FUNC_STANDARD_READ_REQUEST; break; default: dev_err(hba->dev, "%s: Expected query descriptor opcode but got = 0x%.2x\n", __func__, opcode); err = -EINVAL; goto out_unlock; } err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY, QUERY_REQ_TIMEOUT); if (err) { dev_err(hba->dev, "%s: opcode 0x%.2x for idn %d failed, index %d, err = %d\n", __func__, opcode, idn, index, err); goto out_unlock; } hba->dev_cmd.query.descriptor = NULL; *buf_len = be16_to_cpu(response->upiu_res.length); out_unlock: mutex_unlock(&hba->dev_cmd.lock); out: ufshcd_release(hba); return err; } /** * ufshcd_query_descriptor_retry - API function for sending descriptor requests * @hba: per-adapter instance * @opcode: attribute opcode * @idn: attribute idn to access * @index: index field * @selector: selector field * @desc_buf: the buffer that contains the descriptor * @buf_len: length parameter passed to the device * * Returns 0 for success, non-zero in case of failure. * The buf_len parameter will contain, on return, the length parameter * received on the response. */ int ufshcd_query_descriptor_retry(struct ufs_hba *hba, enum query_opcode opcode, enum desc_idn idn, u8 index, u8 selector, u8 *desc_buf, int *buf_len) { int err; int retries; for (retries = QUERY_REQ_RETRIES; retries > 0; retries--) { err = __ufshcd_query_descriptor(hba, opcode, idn, index, selector, desc_buf, buf_len); if (!err || err == -EINVAL) break; } return err; } /** * ufshcd_read_desc_length - read the specified descriptor length from header * @hba: Pointer to adapter instance * @desc_id: descriptor idn value * @desc_index: descriptor index * @desc_length: pointer to variable to read the length of descriptor * * Return 0 in case of success, non-zero otherwise */ static int ufshcd_read_desc_length(struct ufs_hba *hba, enum desc_idn desc_id, int desc_index, int *desc_length) { int ret; u8 header[QUERY_DESC_HDR_SIZE]; int header_len = QUERY_DESC_HDR_SIZE; if (desc_id >= QUERY_DESC_IDN_MAX) return -EINVAL; ret = ufshcd_query_descriptor_retry(hba, UPIU_QUERY_OPCODE_READ_DESC, desc_id, desc_index, 0, header, &header_len); if (ret) { dev_err(hba->dev, "%s: Failed to get descriptor header id %d", __func__, desc_id); return ret; } else if (desc_id != header[QUERY_DESC_DESC_TYPE_OFFSET]) { dev_warn(hba->dev, "%s: descriptor header id %d and desc_id %d mismatch", __func__, header[QUERY_DESC_DESC_TYPE_OFFSET], desc_id); ret = -EINVAL; } *desc_length = header[QUERY_DESC_LENGTH_OFFSET]; return ret; } /** * ufshcd_map_desc_id_to_length - map descriptor IDN to its length * @hba: Pointer to adapter instance * @desc_id: descriptor idn value * @desc_len: mapped desc length (out) * * Return 0 in case of success, non-zero otherwise */ int ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id, int *desc_len) { switch (desc_id) { case QUERY_DESC_IDN_DEVICE: *desc_len = hba->desc_size.dev_desc; break; case QUERY_DESC_IDN_POWER: *desc_len = hba->desc_size.pwr_desc; break; case QUERY_DESC_IDN_GEOMETRY: *desc_len = hba->desc_size.geom_desc; break; case QUERY_DESC_IDN_CONFIGURATION: *desc_len = hba->desc_size.conf_desc; break; case QUERY_DESC_IDN_UNIT: *desc_len = hba->desc_size.unit_desc; break; case QUERY_DESC_IDN_INTERCONNECT: *desc_len = hba->desc_size.interc_desc; break; case QUERY_DESC_IDN_STRING: *desc_len = QUERY_DESC_MAX_SIZE; break; case QUERY_DESC_IDN_HEALTH: *desc_len = hba->desc_size.hlth_desc; break; case QUERY_DESC_IDN_RFU_0: case QUERY_DESC_IDN_RFU_1: *desc_len = 0; break; default: *desc_len = 0; return -EINVAL; } return 0; } EXPORT_SYMBOL(ufshcd_map_desc_id_to_length); /** * ufshcd_read_desc_param - read the specified descriptor parameter * @hba: Pointer to adapter instance * @desc_id: descriptor idn value * @desc_index: descriptor index * @param_offset: offset of the parameter to read * @param_read_buf: pointer to buffer where parameter would be read * @param_size: sizeof(param_read_buf) * * Return 0 in case of success, non-zero otherwise */ int ufshcd_read_desc_param(struct ufs_hba *hba, enum desc_idn desc_id, int desc_index, u8 param_offset, u8 *param_read_buf, u8 param_size) { int ret; u8 *desc_buf; int buff_len; bool is_kmalloc = true; /* Safety check */ if (desc_id >= QUERY_DESC_IDN_MAX || !param_size) return -EINVAL; /* Get the max length of descriptor from structure filled up at probe * time. */ ret = ufshcd_map_desc_id_to_length(hba, desc_id, &buff_len); /* Sanity checks */ if (ret || !buff_len) { dev_err(hba->dev, "%s: Failed to get full descriptor length", __func__); return ret; } /* Check whether we need temp memory */ if (param_offset != 0 || param_size < buff_len) { desc_buf = kmalloc(buff_len, GFP_KERNEL); if (!desc_buf) return -ENOMEM; } else { desc_buf = param_read_buf; is_kmalloc = false; } /* Request for full descriptor */ ret = ufshcd_query_descriptor_retry(hba, UPIU_QUERY_OPCODE_READ_DESC, desc_id, desc_index, 0, desc_buf, &buff_len); if (ret) { dev_err(hba->dev, "%s: Failed reading descriptor. desc_id %d, desc_index %d, param_offset %d, ret %d", __func__, desc_id, desc_index, param_offset, ret); goto out; } /* Sanity check */ if (desc_buf[QUERY_DESC_DESC_TYPE_OFFSET] != desc_id) { dev_err(hba->dev, "%s: invalid desc_id %d in descriptor header", __func__, desc_buf[QUERY_DESC_DESC_TYPE_OFFSET]); ret = -EINVAL; goto out; } /* Check wherher we will not copy more data, than available */ if (is_kmalloc && param_size > buff_len) param_size = buff_len; if (is_kmalloc) memcpy(param_read_buf, &desc_buf[param_offset], param_size); out: if (is_kmalloc) kfree(desc_buf); return ret; } static inline int ufshcd_read_desc(struct ufs_hba *hba, enum desc_idn desc_id, int desc_index, u8 *buf, u32 size) { return ufshcd_read_desc_param(hba, desc_id, desc_index, 0, buf, size); } static inline int ufshcd_read_power_desc(struct ufs_hba *hba, u8 *buf, u32 size) { return ufshcd_read_desc(hba, QUERY_DESC_IDN_POWER, 0, buf, size); } static int ufshcd_read_device_desc(struct ufs_hba *hba, u8 *buf, u32 size) { return ufshcd_read_desc(hba, QUERY_DESC_IDN_DEVICE, 0, buf, size); } /** * ufshcd_read_string_desc - read string descriptor * @hba: pointer to adapter instance * @desc_index: descriptor index * @buf: pointer to buffer where descriptor would be read * @size: size of buf * @ascii: if true convert from unicode to ascii characters * * Return 0 in case of success, non-zero otherwise */ int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index, u8 *buf, u32 size, bool ascii) { int err = 0; err = ufshcd_read_desc(hba, QUERY_DESC_IDN_STRING, desc_index, buf, size); if (err) { dev_err(hba->dev, "%s: reading String Desc failed after %d retries. err = %d\n", __func__, QUERY_REQ_RETRIES, err); goto out; } if (ascii) { int desc_len; int ascii_len; int i; char *buff_ascii; desc_len = buf[0]; /* remove header and divide by 2 to move from UTF16 to UTF8 */ ascii_len = (desc_len - QUERY_DESC_HDR_SIZE) / 2 + 1; if (size < ascii_len + QUERY_DESC_HDR_SIZE) { dev_err(hba->dev, "%s: buffer allocated size is too small\n", __func__); err = -ENOMEM; goto out; } buff_ascii = kmalloc(ascii_len, GFP_KERNEL); if (!buff_ascii) { err = -ENOMEM; goto out; } /* * the descriptor contains string in UTF16 format * we need to convert to utf-8 so it can be displayed */ utf16s_to_utf8s((wchar_t *)&buf[QUERY_DESC_HDR_SIZE], desc_len - QUERY_DESC_HDR_SIZE, UTF16_BIG_ENDIAN, buff_ascii, ascii_len); /* replace non-printable or non-ASCII characters with spaces */ for (i = 0; i < ascii_len; i++) ufshcd_remove_non_printable(&buff_ascii[i]); memset(buf + QUERY_DESC_HDR_SIZE, 0, size - QUERY_DESC_HDR_SIZE); memcpy(buf + QUERY_DESC_HDR_SIZE, buff_ascii, ascii_len); buf[QUERY_DESC_LENGTH_OFFSET] = ascii_len + QUERY_DESC_HDR_SIZE; kfree(buff_ascii); } out: return err; } /** * ufshcd_read_unit_desc_param - read the specified unit descriptor parameter * @hba: Pointer to adapter instance * @lun: lun id * @param_offset: offset of the parameter to read * @param_read_buf: pointer to buffer where parameter would be read * @param_size: sizeof(param_read_buf) * * Return 0 in case of success, non-zero otherwise */ static inline int ufshcd_read_unit_desc_param(struct ufs_hba *hba, int lun, enum unit_desc_param param_offset, u8 *param_read_buf, u32 param_size) { /* * Unit descriptors are only available for general purpose LUs (LUN id * from 0 to 7) and RPMB Well known LU. */ if (!ufs_is_valid_unit_desc_lun(lun)) return -EOPNOTSUPP; return ufshcd_read_desc_param(hba, QUERY_DESC_IDN_UNIT, lun, param_offset, param_read_buf, param_size); } /** * ufshcd_memory_alloc - allocate memory for host memory space data structures * @hba: per adapter instance * * 1. Allocate DMA memory for Command Descriptor array * Each command descriptor consist of Command UPIU, Response UPIU and PRDT * 2. Allocate DMA memory for UTP Transfer Request Descriptor List (UTRDL). * 3. Allocate DMA memory for UTP Task Management Request Descriptor List * (UTMRDL) * 4. Allocate memory for local reference block(lrb). * * Returns 0 for success, non-zero in case of failure */ static int ufshcd_memory_alloc(struct ufs_hba *hba) { size_t utmrdl_size, utrdl_size, ucdl_size; /* Allocate memory for UTP command descriptors */ ucdl_size = (sizeof(struct utp_transfer_cmd_desc) * hba->nutrs); hba->ucdl_base_addr = dmam_alloc_coherent(hba->dev, ucdl_size, &hba->ucdl_dma_addr, GFP_KERNEL); /* * UFSHCI requires UTP command descriptor to be 128 byte aligned. * make sure hba->ucdl_dma_addr is aligned to PAGE_SIZE * if hba->ucdl_dma_addr is aligned to PAGE_SIZE, then it will * be aligned to 128 bytes as well */ if (!hba->ucdl_base_addr || WARN_ON(hba->ucdl_dma_addr & (PAGE_SIZE - 1))) { dev_err(hba->dev, "Command Descriptor Memory allocation failed\n"); goto out; } /* * Allocate memory for UTP Transfer descriptors * UFSHCI requires 1024 byte alignment of UTRD */ utrdl_size = (sizeof(struct utp_transfer_req_desc) * hba->nutrs); hba->utrdl_base_addr = dmam_alloc_coherent(hba->dev, utrdl_size, &hba->utrdl_dma_addr, GFP_KERNEL); if (!hba->utrdl_base_addr || WARN_ON(hba->utrdl_dma_addr & (PAGE_SIZE - 1))) { dev_err(hba->dev, "Transfer Descriptor Memory allocation failed\n"); goto out; } /* * Allocate memory for UTP Task Management descriptors * UFSHCI requires 1024 byte alignment of UTMRD */ utmrdl_size = sizeof(struct utp_task_req_desc) * hba->nutmrs; hba->utmrdl_base_addr = dmam_alloc_coherent(hba->dev, utmrdl_size, &hba->utmrdl_dma_addr, GFP_KERNEL); if (!hba->utmrdl_base_addr || WARN_ON(hba->utmrdl_dma_addr & (PAGE_SIZE - 1))) { dev_err(hba->dev, "Task Management Descriptor Memory allocation failed\n"); goto out; } /* Allocate memory for local reference block */ hba->lrb = devm_kcalloc(hba->dev, hba->nutrs, sizeof(struct ufshcd_lrb), GFP_KERNEL); if (!hba->lrb) { dev_err(hba->dev, "LRB Memory allocation failed\n"); goto out; } return 0; out: return -ENOMEM; } /** * ufshcd_host_memory_configure - configure local reference block with * memory offsets * @hba: per adapter instance * * Configure Host memory space * 1. Update Corresponding UTRD.UCDBA and UTRD.UCDBAU with UCD DMA * address. * 2. Update each UTRD with Response UPIU offset, Response UPIU length * and PRDT offset. * 3. Save the corresponding addresses of UTRD, UCD.CMD, UCD.RSP and UCD.PRDT * into local reference block. */ static void ufshcd_host_memory_configure(struct ufs_hba *hba) { struct utp_transfer_cmd_desc *cmd_descp; struct utp_transfer_req_desc *utrdlp; dma_addr_t cmd_desc_dma_addr; dma_addr_t cmd_desc_element_addr; u16 response_offset; u16 prdt_offset; int cmd_desc_size; int i; utrdlp = hba->utrdl_base_addr; cmd_descp = hba->ucdl_base_addr; response_offset = offsetof(struct utp_transfer_cmd_desc, response_upiu); prdt_offset = offsetof(struct utp_transfer_cmd_desc, prd_table); cmd_desc_size = sizeof(struct utp_transfer_cmd_desc); cmd_desc_dma_addr = hba->ucdl_dma_addr; for (i = 0; i < hba->nutrs; i++) { /* Configure UTRD with command descriptor base address */ cmd_desc_element_addr = (cmd_desc_dma_addr + (cmd_desc_size * i)); utrdlp[i].command_desc_base_addr_lo = cpu_to_le32(lower_32_bits(cmd_desc_element_addr)); utrdlp[i].command_desc_base_addr_hi = cpu_to_le32(upper_32_bits(cmd_desc_element_addr)); /* Response upiu and prdt offset should be in double words */ if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN) { utrdlp[i].response_upiu_offset = cpu_to_le16(response_offset); utrdlp[i].prd_table_offset = cpu_to_le16(prdt_offset); utrdlp[i].response_upiu_length = cpu_to_le16(ALIGNED_UPIU_SIZE); } else { utrdlp[i].response_upiu_offset = cpu_to_le16((response_offset >> 2)); utrdlp[i].prd_table_offset = cpu_to_le16((prdt_offset >> 2)); utrdlp[i].response_upiu_length = cpu_to_le16(ALIGNED_UPIU_SIZE >> 2); } hba->lrb[i].utr_descriptor_ptr = (utrdlp + i); hba->lrb[i].utrd_dma_addr = hba->utrdl_dma_addr + (i * sizeof(struct utp_transfer_req_desc)); hba->lrb[i].ucd_req_ptr = (struct utp_upiu_req *)(cmd_descp + i); hba->lrb[i].ucd_req_dma_addr = cmd_desc_element_addr; hba->lrb[i].ucd_rsp_ptr = (struct utp_upiu_rsp *)cmd_descp[i].response_upiu; hba->lrb[i].ucd_rsp_dma_addr = cmd_desc_element_addr + response_offset; hba->lrb[i].ucd_prdt_ptr = (struct ufshcd_sg_entry *)cmd_descp[i].prd_table; hba->lrb[i].ucd_prdt_dma_addr = cmd_desc_element_addr + prdt_offset; } } /** * ufshcd_dme_link_startup - Notify Unipro to perform link startup * @hba: per adapter instance * * UIC_CMD_DME_LINK_STARTUP command must be issued to Unipro layer, * in order to initialize the Unipro link startup procedure. * Once the Unipro links are up, the device connected to the controller * is detected. * * Returns 0 on success, non-zero value on failure */ static int ufshcd_dme_link_startup(struct ufs_hba *hba) { struct uic_command uic_cmd = {0}; int ret; uic_cmd.command = UIC_CMD_DME_LINK_STARTUP; ret = ufshcd_send_uic_cmd(hba, &uic_cmd); if (ret) dev_dbg(hba->dev, "dme-link-startup: error code %d\n", ret); return ret; } /** * ufshcd_dme_reset - UIC command for DME_RESET * @hba: per adapter instance * * DME_RESET command is issued in order to reset UniPro stack. * This function now deal with cold reset. * * Returns 0 on success, non-zero value on failure */ static int ufshcd_dme_reset(struct ufs_hba *hba) { struct uic_command uic_cmd = {0}; int ret; uic_cmd.command = UIC_CMD_DME_RESET; ret = ufshcd_send_uic_cmd(hba, &uic_cmd); if (ret) dev_err(hba->dev, "dme-reset: error code %d\n", ret); return ret; } /** * ufshcd_dme_enable - UIC command for DME_ENABLE * @hba: per adapter instance * * DME_ENABLE command is issued in order to enable UniPro stack. * * Returns 0 on success, non-zero value on failure */ static int ufshcd_dme_enable(struct ufs_hba *hba) { struct uic_command uic_cmd = {0}; int ret; uic_cmd.command = UIC_CMD_DME_ENABLE; ret = ufshcd_send_uic_cmd(hba, &uic_cmd); if (ret) dev_err(hba->dev, "dme-reset: error code %d\n", ret); return ret; } static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba) { #define MIN_DELAY_BEFORE_DME_CMDS_US 1000 unsigned long min_sleep_time_us; if (!(hba->quirks & UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS)) return; /* * last_dme_cmd_tstamp will be 0 only for 1st call to * this function */ if (unlikely(!ktime_to_us(hba->last_dme_cmd_tstamp))) { min_sleep_time_us = MIN_DELAY_BEFORE_DME_CMDS_US; } else { unsigned long delta = (unsigned long) ktime_to_us( ktime_sub(ktime_get(), hba->last_dme_cmd_tstamp)); if (delta < MIN_DELAY_BEFORE_DME_CMDS_US) min_sleep_time_us = MIN_DELAY_BEFORE_DME_CMDS_US - delta; else return; /* no more delay required */ } /* allow sleep for extra 50us if needed */ usleep_range(min_sleep_time_us, min_sleep_time_us + 50); } /** * ufshcd_dme_set_attr - UIC command for DME_SET, DME_PEER_SET * @hba: per adapter instance * @attr_sel: uic command argument1 * @attr_set: attribute set type as uic command argument2 * @mib_val: setting value as uic command argument3 * @peer: indicate whether peer or local * * Returns 0 on success, non-zero value on failure */ int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel, u8 attr_set, u32 mib_val, u8 peer) { struct uic_command uic_cmd = {0}; static const char *const action[] = { "dme-set", "dme-peer-set" }; const char *set = action[!!peer]; int ret; int retries = UFS_UIC_COMMAND_RETRIES; uic_cmd.command = peer ? UIC_CMD_DME_PEER_SET : UIC_CMD_DME_SET; uic_cmd.argument1 = attr_sel; uic_cmd.argument2 = UIC_ARG_ATTR_TYPE(attr_set); uic_cmd.argument3 = mib_val; do { /* for peer attributes we retry upon failure */ ret = ufshcd_send_uic_cmd(hba, &uic_cmd); if (ret) dev_dbg(hba->dev, "%s: attr-id 0x%x val 0x%x error code %d\n", set, UIC_GET_ATTR_ID(attr_sel), mib_val, ret); } while (ret && peer && --retries); if (ret) dev_err(hba->dev, "%s: attr-id 0x%x val 0x%x failed %d retries\n", set, UIC_GET_ATTR_ID(attr_sel), mib_val, UFS_UIC_COMMAND_RETRIES - retries); return ret; } EXPORT_SYMBOL_GPL(ufshcd_dme_set_attr); /** * ufshcd_dme_get_attr - UIC command for DME_GET, DME_PEER_GET * @hba: per adapter instance * @attr_sel: uic command argument1 * @mib_val: the value of the attribute as returned by the UIC command * @peer: indicate whether peer or local * * Returns 0 on success, non-zero value on failure */ int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel, u32 *mib_val, u8 peer) { struct uic_command uic_cmd = {0}; static const char *const action[] = { "dme-get", "dme-peer-get" }; const char *get = action[!!peer]; int ret; int retries = UFS_UIC_COMMAND_RETRIES; struct ufs_pa_layer_attr orig_pwr_info; struct ufs_pa_layer_attr temp_pwr_info; bool pwr_mode_change = false; if (peer && (hba->quirks & UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE)) { orig_pwr_info = hba->pwr_info; temp_pwr_info = orig_pwr_info; if (orig_pwr_info.pwr_tx == FAST_MODE || orig_pwr_info.pwr_rx == FAST_MODE) { temp_pwr_info.pwr_tx = FASTAUTO_MODE; temp_pwr_info.pwr_rx = FASTAUTO_MODE; pwr_mode_change = true; } else if (orig_pwr_info.pwr_tx == SLOW_MODE || orig_pwr_info.pwr_rx == SLOW_MODE) { temp_pwr_info.pwr_tx = SLOWAUTO_MODE; temp_pwr_info.pwr_rx = SLOWAUTO_MODE; pwr_mode_change = true; } if (pwr_mode_change) { ret = ufshcd_change_power_mode(hba, &temp_pwr_info); if (ret) goto out; } } uic_cmd.command = peer ? UIC_CMD_DME_PEER_GET : UIC_CMD_DME_GET; uic_cmd.argument1 = attr_sel; do { /* for peer attributes we retry upon failure */ ret = ufshcd_send_uic_cmd(hba, &uic_cmd); if (ret) dev_dbg(hba->dev, "%s: attr-id 0x%x error code %d\n", get, UIC_GET_ATTR_ID(attr_sel), ret); } while (ret && peer && --retries); if (ret) dev_err(hba->dev, "%s: attr-id 0x%x failed %d retries\n", get, UIC_GET_ATTR_ID(attr_sel), UFS_UIC_COMMAND_RETRIES - retries); if (mib_val && !ret) *mib_val = uic_cmd.argument3; if (peer && (hba->quirks & UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE) && pwr_mode_change) ufshcd_change_power_mode(hba, &orig_pwr_info); out: return ret; } EXPORT_SYMBOL_GPL(ufshcd_dme_get_attr); /** * ufshcd_uic_pwr_ctrl - executes UIC commands (which affects the link power * state) and waits for it to take effect. * * @hba: per adapter instance * @cmd: UIC command to execute * * DME operations like DME_SET(PA_PWRMODE), DME_HIBERNATE_ENTER & * DME_HIBERNATE_EXIT commands take some time to take its effect on both host * and device UniPro link and hence it's final completion would be indicated by * dedicated status bits in Interrupt Status register (UPMS, UHES, UHXS) in * addition to normal UIC command completion Status (UCCS). This function only * returns after the relevant status bits indicate the completion. * * Returns 0 on success, non-zero value on failure */ static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd) { struct completion uic_async_done; unsigned long flags; u8 status; int ret; bool reenable_intr = false; mutex_lock(&hba->uic_cmd_mutex); init_completion(&uic_async_done); ufshcd_add_delay_before_dme_cmd(hba); spin_lock_irqsave(hba->host->host_lock, flags); hba->uic_async_done = &uic_async_done; if (ufshcd_readl(hba, REG_INTERRUPT_ENABLE) & UIC_COMMAND_COMPL) { ufshcd_disable_intr(hba, UIC_COMMAND_COMPL); /* * Make sure UIC command completion interrupt is disabled before * issuing UIC command. */ wmb(); reenable_intr = true; } ret = __ufshcd_send_uic_cmd(hba, cmd, false); spin_unlock_irqrestore(hba->host->host_lock, flags); if (ret) { dev_err(hba->dev, "pwr ctrl cmd 0x%x with mode 0x%x uic error %d\n", cmd->command, cmd->argument3, ret); goto out; } if (!wait_for_completion_timeout(hba->uic_async_done, msecs_to_jiffies(UIC_CMD_TIMEOUT))) { dev_err(hba->dev, "pwr ctrl cmd 0x%x with mode 0x%x completion timeout\n", cmd->command, cmd->argument3); ret = -ETIMEDOUT; goto out; } status = ufshcd_get_upmcrs(hba); if (status != PWR_LOCAL) { dev_err(hba->dev, "pwr ctrl cmd 0x%x failed, host upmcrs:0x%x\n", cmd->command, status); ret = (status != PWR_OK) ? status : -1; } out: if (ret) { ufshcd_print_host_state(hba); ufshcd_print_pwr_info(hba); ufshcd_print_host_regs(hba); } spin_lock_irqsave(hba->host->host_lock, flags); hba->active_uic_cmd = NULL; hba->uic_async_done = NULL; if (reenable_intr) ufshcd_enable_intr(hba, UIC_COMMAND_COMPL); spin_unlock_irqrestore(hba->host->host_lock, flags); mutex_unlock(&hba->uic_cmd_mutex); return ret; } /** * ufshcd_uic_change_pwr_mode - Perform the UIC power mode chage * using DME_SET primitives. * @hba: per adapter instance * @mode: powr mode value * * Returns 0 on success, non-zero value on failure */ static int ufshcd_uic_change_pwr_mode(struct ufs_hba *hba, u8 mode) { struct uic_command uic_cmd = {0}; int ret; if (hba->quirks & UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP) { ret = ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(PA_RXHSUNTERMCAP, 0), 1); if (ret) { dev_err(hba->dev, "%s: failed to enable PA_RXHSUNTERMCAP ret %d\n", __func__, ret); goto out; } } uic_cmd.command = UIC_CMD_DME_SET; uic_cmd.argument1 = UIC_ARG_MIB(PA_PWRMODE); uic_cmd.argument3 = mode; ufshcd_hold(hba, false); ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd); ufshcd_release(hba); out: return ret; } static int ufshcd_link_recovery(struct ufs_hba *hba) { int ret; unsigned long flags; spin_lock_irqsave(hba->host->host_lock, flags); hba->ufshcd_state = UFSHCD_STATE_RESET; ufshcd_set_eh_in_progress(hba); spin_unlock_irqrestore(hba->host->host_lock, flags); ret = ufshcd_host_reset_and_restore(hba); spin_lock_irqsave(hba->host->host_lock, flags); if (ret) hba->ufshcd_state = UFSHCD_STATE_ERROR; ufshcd_clear_eh_in_progress(hba); spin_unlock_irqrestore(hba->host->host_lock, flags); if (ret) dev_err(hba->dev, "%s: link recovery failed, err %d", __func__, ret); return ret; } static int __ufshcd_uic_hibern8_enter(struct ufs_hba *hba) { int ret; struct uic_command uic_cmd = {0}; ktime_t start = ktime_get(); ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_ENTER, PRE_CHANGE); uic_cmd.command = UIC_CMD_DME_HIBER_ENTER; ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd); trace_ufshcd_profile_hibern8(dev_name(hba->dev), "enter", ktime_to_us(ktime_sub(ktime_get(), start)), ret); if (ret) { dev_err(hba->dev, "%s: hibern8 enter failed. ret = %d\n", __func__, ret); /* * If link recovery fails then return error so that caller * don't retry the hibern8 enter again. */ if (ufshcd_link_recovery(hba)) ret = -ENOLINK; } else ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_ENTER, POST_CHANGE); return ret; } static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba) { int ret = 0, retries; for (retries = UIC_HIBERN8_ENTER_RETRIES; retries > 0; retries--) { ret = __ufshcd_uic_hibern8_enter(hba); if (!ret || ret == -ENOLINK) goto out; } out: return ret; } static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba) { struct uic_command uic_cmd = {0}; int ret; ktime_t start = ktime_get(); ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_EXIT, PRE_CHANGE); uic_cmd.command = UIC_CMD_DME_HIBER_EXIT; ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd); trace_ufshcd_profile_hibern8(dev_name(hba->dev), "exit", ktime_to_us(ktime_sub(ktime_get(), start)), ret); if (ret) { dev_err(hba->dev, "%s: hibern8 exit failed. ret = %d\n", __func__, ret); ret = ufshcd_link_recovery(hba); } else { ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_EXIT, POST_CHANGE); hba->ufs_stats.last_hibern8_exit_tstamp = ktime_get(); hba->ufs_stats.hibern8_exit_cnt++; } return ret; } static void ufshcd_auto_hibern8_enable(struct ufs_hba *hba) { unsigned long flags; if (!(hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT) || !hba->ahit) return; spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_writel(hba, hba->ahit, REG_AUTO_HIBERNATE_IDLE_TIMER); spin_unlock_irqrestore(hba->host->host_lock, flags); } /** * ufshcd_init_pwr_info - setting the POR (power on reset) * values in hba power info * @hba: per-adapter instance */ static void ufshcd_init_pwr_info(struct ufs_hba *hba) { hba->pwr_info.gear_rx = UFS_PWM_G1; hba->pwr_info.gear_tx = UFS_PWM_G1; hba->pwr_info.lane_rx = 1; hba->pwr_info.lane_tx = 1; hba->pwr_info.pwr_rx = SLOWAUTO_MODE; hba->pwr_info.pwr_tx = SLOWAUTO_MODE; hba->pwr_info.hs_rate = 0; } /** * ufshcd_get_max_pwr_mode - reads the max power mode negotiated with device * @hba: per-adapter instance */ static int ufshcd_get_max_pwr_mode(struct ufs_hba *hba) { struct ufs_pa_layer_attr *pwr_info = &hba->max_pwr_info.info; if (hba->max_pwr_info.is_valid) return 0; pwr_info->pwr_tx = FAST_MODE; pwr_info->pwr_rx = FAST_MODE; pwr_info->hs_rate = PA_HS_MODE_B; /* Get the connected lane count */ ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDRXDATALANES), &pwr_info->lane_rx); ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), &pwr_info->lane_tx); if (!pwr_info->lane_rx || !pwr_info->lane_tx) { dev_err(hba->dev, "%s: invalid connected lanes value. rx=%d, tx=%d\n", __func__, pwr_info->lane_rx, pwr_info->lane_tx); return -EINVAL; } /* * First, get the maximum gears of HS speed. * If a zero value, it means there is no HSGEAR capability. * Then, get the maximum gears of PWM speed. */ ufshcd_dme_get(hba, UIC_ARG_MIB(PA_MAXRXHSGEAR), &pwr_info->gear_rx); if (!pwr_info->gear_rx) { ufshcd_dme_get(hba, UIC_ARG_MIB(PA_MAXRXPWMGEAR), &pwr_info->gear_rx); if (!pwr_info->gear_rx) { dev_err(hba->dev, "%s: invalid max pwm rx gear read = %d\n", __func__, pwr_info->gear_rx); return -EINVAL; } pwr_info->pwr_rx = SLOW_MODE; } ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_MAXRXHSGEAR), &pwr_info->gear_tx); if (!pwr_info->gear_tx) { ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_MAXRXPWMGEAR), &pwr_info->gear_tx); if (!pwr_info->gear_tx) { dev_err(hba->dev, "%s: invalid max pwm tx gear read = %d\n", __func__, pwr_info->gear_tx); return -EINVAL; } pwr_info->pwr_tx = SLOW_MODE; } hba->max_pwr_info.is_valid = true; return 0; } static int ufshcd_change_power_mode(struct ufs_hba *hba, struct ufs_pa_layer_attr *pwr_mode) { int ret; /* if already configured to the requested pwr_mode */ if (pwr_mode->gear_rx == hba->pwr_info.gear_rx && pwr_mode->gear_tx == hba->pwr_info.gear_tx && pwr_mode->lane_rx == hba->pwr_info.lane_rx && pwr_mode->lane_tx == hba->pwr_info.lane_tx && pwr_mode->pwr_rx == hba->pwr_info.pwr_rx && pwr_mode->pwr_tx == hba->pwr_info.pwr_tx && pwr_mode->hs_rate == hba->pwr_info.hs_rate) { dev_dbg(hba->dev, "%s: power already configured\n", __func__); return 0; } /* * Configure attributes for power mode change with below. * - PA_RXGEAR, PA_ACTIVERXDATALANES, PA_RXTERMINATION, * - PA_TXGEAR, PA_ACTIVETXDATALANES, PA_TXTERMINATION, * - PA_HSSERIES */ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXGEAR), pwr_mode->gear_rx); ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVERXDATALANES), pwr_mode->lane_rx); if (pwr_mode->pwr_rx == FASTAUTO_MODE || pwr_mode->pwr_rx == FAST_MODE) ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXTERMINATION), TRUE); else ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXTERMINATION), FALSE); ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXGEAR), pwr_mode->gear_tx); ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVETXDATALANES), pwr_mode->lane_tx); if (pwr_mode->pwr_tx == FASTAUTO_MODE || pwr_mode->pwr_tx == FAST_MODE) ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXTERMINATION), TRUE); else ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXTERMINATION), FALSE); if (pwr_mode->pwr_rx == FASTAUTO_MODE || pwr_mode->pwr_tx == FASTAUTO_MODE || pwr_mode->pwr_rx == FAST_MODE || pwr_mode->pwr_tx == FAST_MODE) ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HSSERIES), pwr_mode->hs_rate); ret = ufshcd_uic_change_pwr_mode(hba, pwr_mode->pwr_rx << 4 | pwr_mode->pwr_tx); if (ret) { dev_err(hba->dev, "%s: power mode change failed %d\n", __func__, ret); } else { ufshcd_vops_pwr_change_notify(hba, POST_CHANGE, NULL, pwr_mode); memcpy(&hba->pwr_info, pwr_mode, sizeof(struct ufs_pa_layer_attr)); } return ret; } /** * ufshcd_config_pwr_mode - configure a new power mode * @hba: per-adapter instance * @desired_pwr_mode: desired power configuration */ int ufshcd_config_pwr_mode(struct ufs_hba *hba, struct ufs_pa_layer_attr *desired_pwr_mode) { struct ufs_pa_layer_attr final_params = { 0 }; int ret; ret = ufshcd_vops_pwr_change_notify(hba, PRE_CHANGE, desired_pwr_mode, &final_params); if (ret) memcpy(&final_params, desired_pwr_mode, sizeof(final_params)); ret = ufshcd_change_power_mode(hba, &final_params); if (!ret) ufshcd_print_pwr_info(hba); return ret; } EXPORT_SYMBOL_GPL(ufshcd_config_pwr_mode); /** * ufshcd_complete_dev_init() - checks device readiness * @hba: per-adapter instance * * Set fDeviceInit flag and poll until device toggles it. */ static int ufshcd_complete_dev_init(struct ufs_hba *hba) { int i; int err; bool flag_res = 1; err = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_SET_FLAG, QUERY_FLAG_IDN_FDEVICEINIT, NULL); if (err) { dev_err(hba->dev, "%s setting fDeviceInit flag failed with error %d\n", __func__, err); goto out; } /* poll for max. 1000 iterations for fDeviceInit flag to clear */ for (i = 0; i < 1000 && !err && flag_res; i++) err = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_READ_FLAG, QUERY_FLAG_IDN_FDEVICEINIT, &flag_res); if (err) dev_err(hba->dev, "%s reading fDeviceInit flag failed with error %d\n", __func__, err); else if (flag_res) dev_err(hba->dev, "%s fDeviceInit was not cleared by the device\n", __func__); out: return err; } /** * ufshcd_make_hba_operational - Make UFS controller operational * @hba: per adapter instance * * To bring UFS host controller to operational state, * 1. Enable required interrupts * 2. Configure interrupt aggregation * 3. Program UTRL and UTMRL base address * 4. Configure run-stop-registers * * Returns 0 on success, non-zero value on failure */ static int ufshcd_make_hba_operational(struct ufs_hba *hba) { int err = 0; u32 reg; /* Enable required interrupts */ ufshcd_enable_intr(hba, UFSHCD_ENABLE_INTRS); /* Configure interrupt aggregation */ if (ufshcd_is_intr_aggr_allowed(hba)) ufshcd_config_intr_aggr(hba, hba->nutrs - 1, INT_AGGR_DEF_TO); else ufshcd_disable_intr_aggr(hba); /* Configure UTRL and UTMRL base address registers */ ufshcd_writel(hba, lower_32_bits(hba->utrdl_dma_addr), REG_UTP_TRANSFER_REQ_LIST_BASE_L); ufshcd_writel(hba, upper_32_bits(hba->utrdl_dma_addr), REG_UTP_TRANSFER_REQ_LIST_BASE_H); ufshcd_writel(hba, lower_32_bits(hba->utmrdl_dma_addr), REG_UTP_TASK_REQ_LIST_BASE_L); ufshcd_writel(hba, upper_32_bits(hba->utmrdl_dma_addr), REG_UTP_TASK_REQ_LIST_BASE_H); /* * Make sure base address and interrupt setup are updated before * enabling the run/stop registers below. */ wmb(); /* * UCRDY, UTMRLDY and UTRLRDY bits must be 1 */ reg = ufshcd_readl(hba, REG_CONTROLLER_STATUS); if (!(ufshcd_get_lists_status(reg))) { ufshcd_enable_run_stop_reg(hba); } else { dev_err(hba->dev, "Host controller not ready to process requests"); err = -EIO; goto out; } out: return err; } /** * ufshcd_hba_stop - Send controller to reset state * @hba: per adapter instance * @can_sleep: perform sleep or just spin */ static inline void ufshcd_hba_stop(struct ufs_hba *hba, bool can_sleep) { int err; ufshcd_writel(hba, CONTROLLER_DISABLE, REG_CONTROLLER_ENABLE); err = ufshcd_wait_for_register(hba, REG_CONTROLLER_ENABLE, CONTROLLER_ENABLE, CONTROLLER_DISABLE, 10, 1, can_sleep); if (err) dev_err(hba->dev, "%s: Controller disable failed\n", __func__); } /** * ufshcd_hba_execute_hce - initialize the controller * @hba: per adapter instance * * The controller resets itself and controller firmware initialization * sequence kicks off. When controller is ready it will set * the Host Controller Enable bit to 1. * * Returns 0 on success, non-zero value on failure */ static int ufshcd_hba_execute_hce(struct ufs_hba *hba) { int retry; /* * msleep of 1 and 5 used in this function might result in msleep(20), * but it was necessary to send the UFS FPGA to reset mode during * development and testing of this driver. msleep can be changed to * mdelay and retry count can be reduced based on the controller. */ if (!ufshcd_is_hba_active(hba)) /* change controller state to "reset state" */ ufshcd_hba_stop(hba, true); /* UniPro link is disabled at this point */ ufshcd_set_link_off(hba); ufshcd_vops_hce_enable_notify(hba, PRE_CHANGE); /* start controller initialization sequence */ ufshcd_hba_start(hba); /* * To initialize a UFS host controller HCE bit must be set to 1. * During initialization the HCE bit value changes from 1->0->1. * When the host controller completes initialization sequence * it sets the value of HCE bit to 1. The same HCE bit is read back * to check if the controller has completed initialization sequence. * So without this delay the value HCE = 1, set in the previous * instruction might be read back. * This delay can be changed based on the controller. */ msleep(1); /* wait for the host controller to complete initialization */ retry = 10; while (ufshcd_is_hba_active(hba)) { if (retry) { retry--; } else { dev_err(hba->dev, "Controller enable failed\n"); return -EIO; } msleep(5); } /* enable UIC related interrupts */ ufshcd_enable_intr(hba, UFSHCD_UIC_MASK); ufshcd_vops_hce_enable_notify(hba, POST_CHANGE); return 0; } static int ufshcd_hba_enable(struct ufs_hba *hba) { int ret; if (hba->quirks & UFSHCI_QUIRK_BROKEN_HCE) { ufshcd_set_link_off(hba); ufshcd_vops_hce_enable_notify(hba, PRE_CHANGE); /* enable UIC related interrupts */ ufshcd_enable_intr(hba, UFSHCD_UIC_MASK); ret = ufshcd_dme_reset(hba); if (!ret) { ret = ufshcd_dme_enable(hba); if (!ret) ufshcd_vops_hce_enable_notify(hba, POST_CHANGE); if (ret) dev_err(hba->dev, "Host controller enable failed with non-hce\n"); } } else { ret = ufshcd_hba_execute_hce(hba); } return ret; } static int ufshcd_disable_tx_lcc(struct ufs_hba *hba, bool peer) { int tx_lanes, i, err = 0; if (!peer) ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), &tx_lanes); else ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), &tx_lanes); for (i = 0; i < tx_lanes; i++) { if (!peer) err = ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_LCC_ENABLE, UIC_ARG_MPHY_TX_GEN_SEL_INDEX(i)), 0); else err = ufshcd_dme_peer_set(hba, UIC_ARG_MIB_SEL(TX_LCC_ENABLE, UIC_ARG_MPHY_TX_GEN_SEL_INDEX(i)), 0); if (err) { dev_err(hba->dev, "%s: TX LCC Disable failed, peer = %d, lane = %d, err = %d", __func__, peer, i, err); break; } } return err; } static inline int ufshcd_disable_device_tx_lcc(struct ufs_hba *hba) { return ufshcd_disable_tx_lcc(hba, true); } /** * ufshcd_link_startup - Initialize unipro link startup * @hba: per adapter instance * * Returns 0 for success, non-zero in case of failure */ static int ufshcd_link_startup(struct ufs_hba *hba) { int ret; int retries = DME_LINKSTARTUP_RETRIES; bool link_startup_again = false; /* * If UFS device isn't active then we will have to issue link startup * 2 times to make sure the device state move to active. */ if (!ufshcd_is_ufs_dev_active(hba)) link_startup_again = true; link_startup: do { ufshcd_vops_link_startup_notify(hba, PRE_CHANGE); ret = ufshcd_dme_link_startup(hba); /* check if device is detected by inter-connect layer */ if (!ret && !ufshcd_is_device_present(hba)) { dev_err(hba->dev, "%s: Device not present\n", __func__); ret = -ENXIO; goto out; } /* * DME link lost indication is only received when link is up, * but we can't be sure if the link is up until link startup * succeeds. So reset the local Uni-Pro and try again. */ if (ret && ufshcd_hba_enable(hba)) goto out; } while (ret && retries--); if (ret) /* failed to get the link up... retire */ goto out; if (link_startup_again) { link_startup_again = false; retries = DME_LINKSTARTUP_RETRIES; goto link_startup; } /* Mark that link is up in PWM-G1, 1-lane, SLOW-AUTO mode */ ufshcd_init_pwr_info(hba); ufshcd_print_pwr_info(hba); if (hba->quirks & UFSHCD_QUIRK_BROKEN_LCC) { ret = ufshcd_disable_device_tx_lcc(hba); if (ret) goto out; } /* Include any host controller configuration via UIC commands */ ret = ufshcd_vops_link_startup_notify(hba, POST_CHANGE); if (ret) goto out; ret = ufshcd_make_hba_operational(hba); out: if (ret) { dev_err(hba->dev, "link startup failed %d\n", ret); ufshcd_print_host_state(hba); ufshcd_print_pwr_info(hba); ufshcd_print_host_regs(hba); } return ret; } /** * ufshcd_verify_dev_init() - Verify device initialization * @hba: per-adapter instance * * Send NOP OUT UPIU and wait for NOP IN response to check whether the * device Transport Protocol (UTP) layer is ready after a reset. * If the UTP layer at the device side is not initialized, it may * not respond with NOP IN UPIU within timeout of %NOP_OUT_TIMEOUT * and we retry sending NOP OUT for %NOP_OUT_RETRIES iterations. */ static int ufshcd_verify_dev_init(struct ufs_hba *hba) { int err = 0; int retries; ufshcd_hold(hba, false); mutex_lock(&hba->dev_cmd.lock); for (retries = NOP_OUT_RETRIES; retries > 0; retries--) { err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_NOP, NOP_OUT_TIMEOUT); if (!err || err == -ETIMEDOUT) break; dev_dbg(hba->dev, "%s: error %d retrying\n", __func__, err); } mutex_unlock(&hba->dev_cmd.lock); ufshcd_release(hba); if (err) dev_err(hba->dev, "%s: NOP OUT failed %d\n", __func__, err); return err; } /** * ufshcd_set_queue_depth - set lun queue depth * @sdev: pointer to SCSI device * * Read bLUQueueDepth value and activate scsi tagged command * queueing. For WLUN, queue depth is set to 1. For best-effort * cases (bLUQueueDepth = 0) the queue depth is set to a maximum * value that host can queue. */ static void ufshcd_set_queue_depth(struct scsi_device *sdev) { int ret = 0; u8 lun_qdepth; struct ufs_hba *hba; hba = shost_priv(sdev->host); lun_qdepth = hba->nutrs; ret = ufshcd_read_unit_desc_param(hba, ufshcd_scsi_to_upiu_lun(sdev->lun), UNIT_DESC_PARAM_LU_Q_DEPTH, &lun_qdepth, sizeof(lun_qdepth)); /* Some WLUN doesn't support unit descriptor */ if (ret == -EOPNOTSUPP) lun_qdepth = 1; else if (!lun_qdepth) /* eventually, we can figure out the real queue depth */ lun_qdepth = hba->nutrs; else lun_qdepth = min_t(int, lun_qdepth, hba->nutrs); dev_dbg(hba->dev, "%s: activate tcq with queue depth %d\n", __func__, lun_qdepth); scsi_change_queue_depth(sdev, lun_qdepth); } /* * ufshcd_get_lu_wp - returns the "b_lu_write_protect" from UNIT DESCRIPTOR * @hba: per-adapter instance * @lun: UFS device lun id * @b_lu_write_protect: pointer to buffer to hold the LU's write protect info * * Returns 0 in case of success and b_lu_write_protect status would be returned * @b_lu_write_protect parameter. * Returns -ENOTSUPP if reading b_lu_write_protect is not supported. * Returns -EINVAL in case of invalid parameters passed to this function. */ static int ufshcd_get_lu_wp(struct ufs_hba *hba, u8 lun, u8 *b_lu_write_protect) { int ret; if (!b_lu_write_protect) ret = -EINVAL; /* * According to UFS device spec, RPMB LU can't be write * protected so skip reading bLUWriteProtect parameter for * it. For other W-LUs, UNIT DESCRIPTOR is not available. */ else if (lun >= UFS_UPIU_MAX_GENERAL_LUN) ret = -ENOTSUPP; else ret = ufshcd_read_unit_desc_param(hba, lun, UNIT_DESC_PARAM_LU_WR_PROTECT, b_lu_write_protect, sizeof(*b_lu_write_protect)); return ret; } /** * ufshcd_get_lu_power_on_wp_status - get LU's power on write protect * status * @hba: per-adapter instance * @sdev: pointer to SCSI device * */ static inline void ufshcd_get_lu_power_on_wp_status(struct ufs_hba *hba, struct scsi_device *sdev) { if (hba->dev_info.f_power_on_wp_en && !hba->dev_info.is_lu_power_on_wp) { u8 b_lu_write_protect; if (!ufshcd_get_lu_wp(hba, ufshcd_scsi_to_upiu_lun(sdev->lun), &b_lu_write_protect) && (b_lu_write_protect == UFS_LU_POWER_ON_WP)) hba->dev_info.is_lu_power_on_wp = true; } } /** * ufshcd_slave_alloc - handle initial SCSI device configurations * @sdev: pointer to SCSI device * * Returns success */ static int ufshcd_slave_alloc(struct scsi_device *sdev) { struct ufs_hba *hba; hba = shost_priv(sdev->host); /* Mode sense(6) is not supported by UFS, so use Mode sense(10) */ sdev->use_10_for_ms = 1; /* allow SCSI layer to restart the device in case of errors */ sdev->allow_restart = 1; /* REPORT SUPPORTED OPERATION CODES is not supported */ sdev->no_report_opcodes = 1; /* WRITE_SAME command is not supported */ sdev->no_write_same = 1; ufshcd_set_queue_depth(sdev); ufshcd_get_lu_power_on_wp_status(hba, sdev); return 0; } /** * ufshcd_change_queue_depth - change queue depth * @sdev: pointer to SCSI device * @depth: required depth to set * * Change queue depth and make sure the max. limits are not crossed. */ static int ufshcd_change_queue_depth(struct scsi_device *sdev, int depth) { struct ufs_hba *hba = shost_priv(sdev->host); if (depth > hba->nutrs) depth = hba->nutrs; return scsi_change_queue_depth(sdev, depth); } /** * ufshcd_slave_configure - adjust SCSI device configurations * @sdev: pointer to SCSI device */ static int ufshcd_slave_configure(struct scsi_device *sdev) { struct request_queue *q = sdev->request_queue; blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1); blk_queue_max_segment_size(q, PRDT_DATA_BYTE_COUNT_MAX); return 0; } /** * ufshcd_slave_destroy - remove SCSI device configurations * @sdev: pointer to SCSI device */ static void ufshcd_slave_destroy(struct scsi_device *sdev) { struct ufs_hba *hba; hba = shost_priv(sdev->host); /* Drop the reference as it won't be needed anymore */ if (ufshcd_scsi_to_upiu_lun(sdev->lun) == UFS_UPIU_UFS_DEVICE_WLUN) { unsigned long flags; spin_lock_irqsave(hba->host->host_lock, flags); hba->sdev_ufs_device = NULL; spin_unlock_irqrestore(hba->host->host_lock, flags); } } /** * ufshcd_scsi_cmd_status - Update SCSI command result based on SCSI status * @lrbp: pointer to local reference block of completed command * @scsi_status: SCSI command status * * Returns value base on SCSI command status */ static inline int ufshcd_scsi_cmd_status(struct ufshcd_lrb *lrbp, int scsi_status) { int result = 0; switch (scsi_status) { case SAM_STAT_CHECK_CONDITION: ufshcd_copy_sense_data(lrbp); case SAM_STAT_GOOD: result |= DID_OK << 16 | COMMAND_COMPLETE << 8 | scsi_status; break; case SAM_STAT_TASK_SET_FULL: case SAM_STAT_BUSY: case SAM_STAT_TASK_ABORTED: ufshcd_copy_sense_data(lrbp); result |= scsi_status; break; default: result |= DID_ERROR << 16; break; } /* end of switch */ return result; } /** * ufshcd_transfer_rsp_status - Get overall status of the response * @hba: per adapter instance * @lrbp: pointer to local reference block of completed command * * Returns result of the command to notify SCSI midlayer */ static inline int ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) { int result = 0; int scsi_status; int ocs; /* overall command status of utrd */ ocs = ufshcd_get_tr_ocs(lrbp); switch (ocs) { case OCS_SUCCESS: result = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr); hba->ufs_stats.last_hibern8_exit_tstamp = ktime_set(0, 0); switch (result) { case UPIU_TRANSACTION_RESPONSE: /* * get the response UPIU result to extract * the SCSI command status */ result = ufshcd_get_rsp_upiu_result(lrbp->ucd_rsp_ptr); /* * get the result based on SCSI status response * to notify the SCSI midlayer of the command status */ scsi_status = result & MASK_SCSI_STATUS; result = ufshcd_scsi_cmd_status(lrbp, scsi_status); /* * Currently we are only supporting BKOPs exception * events hence we can ignore BKOPs exception event * during power management callbacks. BKOPs exception * event is not expected to be raised in runtime suspend * callback as it allows the urgent bkops. * During system suspend, we are anyway forcefully * disabling the bkops and if urgent bkops is needed * it will be enabled on system resume. Long term * solution could be to abort the system suspend if * UFS device needs urgent BKOPs. */ if (!hba->pm_op_in_progress && ufshcd_is_exception_event(lrbp->ucd_rsp_ptr)) schedule_work(&hba->eeh_work); break; case UPIU_TRANSACTION_REJECT_UPIU: /* TODO: handle Reject UPIU Response */ result = DID_ERROR << 16; dev_err(hba->dev, "Reject UPIU not fully implemented\n"); break; default: result = DID_ERROR << 16; dev_err(hba->dev, "Unexpected request response code = %x\n", result); break; } break; case OCS_ABORTED: result |= DID_ABORT << 16; break; case OCS_INVALID_COMMAND_STATUS: result |= DID_REQUEUE << 16; break; case OCS_INVALID_CMD_TABLE_ATTR: case OCS_INVALID_PRDT_ATTR: case OCS_MISMATCH_DATA_BUF_SIZE: case OCS_MISMATCH_RESP_UPIU_SIZE: case OCS_PEER_COMM_FAILURE: case OCS_FATAL_ERROR: default: result |= DID_ERROR << 16; dev_err(hba->dev, "OCS error from controller = %x for tag %d\n", ocs, lrbp->task_tag); ufshcd_print_host_regs(hba); ufshcd_print_host_state(hba); break; } /* end of switch */ if (host_byte(result) != DID_OK) ufshcd_print_trs(hba, 1 << lrbp->task_tag, true); return result; } /** * ufshcd_uic_cmd_compl - handle completion of uic command * @hba: per adapter instance * @intr_status: interrupt status generated by the controller */ static void ufshcd_uic_cmd_compl(struct ufs_hba *hba, u32 intr_status) { if ((intr_status & UIC_COMMAND_COMPL) && hba->active_uic_cmd) { hba->active_uic_cmd->argument2 |= ufshcd_get_uic_cmd_result(hba); hba->active_uic_cmd->argument3 = ufshcd_get_dme_attr_val(hba); complete(&hba->active_uic_cmd->done); } if ((intr_status & UFSHCD_UIC_PWR_MASK) && hba->uic_async_done) complete(hba->uic_async_done); } /** * __ufshcd_transfer_req_compl - handle SCSI and query command completion * @hba: per adapter instance * @completed_reqs: requests to complete */ static void __ufshcd_transfer_req_compl(struct ufs_hba *hba, unsigned long completed_reqs) { struct ufshcd_lrb *lrbp; struct scsi_cmnd *cmd; int result; int index; for_each_set_bit(index, &completed_reqs, hba->nutrs) { lrbp = &hba->lrb[index]; cmd = lrbp->cmd; if (cmd) { ufshcd_add_command_trace(hba, index, "complete"); result = ufshcd_transfer_rsp_status(hba, lrbp); scsi_dma_unmap(cmd); cmd->result = result; /* Mark completed command as NULL in LRB */ lrbp->cmd = NULL; clear_bit_unlock(index, &hba->lrb_in_use); /* Do not touch lrbp after scsi done */ cmd->scsi_done(cmd); __ufshcd_release(hba); } else if (lrbp->command_type == UTP_CMD_TYPE_DEV_MANAGE || lrbp->command_type == UTP_CMD_TYPE_UFS_STORAGE) { if (hba->dev_cmd.complete) { ufshcd_add_command_trace(hba, index, "dev_complete"); complete(hba->dev_cmd.complete); } } if (ufshcd_is_clkscaling_supported(hba)) hba->clk_scaling.active_reqs--; lrbp->compl_time_stamp = ktime_get(); } /* clear corresponding bits of completed commands */ hba->outstanding_reqs ^= completed_reqs; ufshcd_clk_scaling_update_busy(hba); /* we might have free'd some tags above */ wake_up(&hba->dev_cmd.tag_wq); } /** * ufshcd_transfer_req_compl - handle SCSI and query command completion * @hba: per adapter instance */ static void ufshcd_transfer_req_compl(struct ufs_hba *hba) { unsigned long completed_reqs; u32 tr_doorbell; /* Resetting interrupt aggregation counters first and reading the * DOOR_BELL afterward allows us to handle all the completed requests. * In order to prevent other interrupts starvation the DB is read once * after reset. The down side of this solution is the possibility of * false interrupt if device completes another request after resetting * aggregation and before reading the DB. */ if (ufshcd_is_intr_aggr_allowed(hba) && !(hba->quirks & UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR)) ufshcd_reset_intr_aggr(hba); tr_doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); completed_reqs = tr_doorbell ^ hba->outstanding_reqs; __ufshcd_transfer_req_compl(hba, completed_reqs); } /** * ufshcd_disable_ee - disable exception event * @hba: per-adapter instance * @mask: exception event to disable * * Disables exception event in the device so that the EVENT_ALERT * bit is not set. * * Returns zero on success, non-zero error value on failure. */ static int ufshcd_disable_ee(struct ufs_hba *hba, u16 mask) { int err = 0; u32 val; if (!(hba->ee_ctrl_mask & mask)) goto out; val = hba->ee_ctrl_mask & ~mask; val &= MASK_EE_STATUS; err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR, QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val); if (!err) hba->ee_ctrl_mask &= ~mask; out: return err; } /** * ufshcd_enable_ee - enable exception event * @hba: per-adapter instance * @mask: exception event to enable * * Enable corresponding exception event in the device to allow * device to alert host in critical scenarios. * * Returns zero on success, non-zero error value on failure. */ static int ufshcd_enable_ee(struct ufs_hba *hba, u16 mask) { int err = 0; u32 val; if (hba->ee_ctrl_mask & mask) goto out; val = hba->ee_ctrl_mask | mask; val &= MASK_EE_STATUS; err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR, QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val); if (!err) hba->ee_ctrl_mask |= mask; out: return err; } /** * ufshcd_enable_auto_bkops - Allow device managed BKOPS * @hba: per-adapter instance * * Allow device to manage background operations on its own. Enabling * this might lead to inconsistent latencies during normal data transfers * as the device is allowed to manage its own way of handling background * operations. * * Returns zero on success, non-zero on failure. */ static int ufshcd_enable_auto_bkops(struct ufs_hba *hba) { int err = 0; if (hba->auto_bkops_enabled) goto out; err = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_SET_FLAG, QUERY_FLAG_IDN_BKOPS_EN, NULL); if (err) { dev_err(hba->dev, "%s: failed to enable bkops %d\n", __func__, err); goto out; } hba->auto_bkops_enabled = true; trace_ufshcd_auto_bkops_state(dev_name(hba->dev), "Enabled"); /* No need of URGENT_BKOPS exception from the device */ err = ufshcd_disable_ee(hba, MASK_EE_URGENT_BKOPS); if (err) dev_err(hba->dev, "%s: failed to disable exception event %d\n", __func__, err); out: return err; } /** * ufshcd_disable_auto_bkops - block device in doing background operations * @hba: per-adapter instance * * Disabling background operations improves command response latency but * has drawback of device moving into critical state where the device is * not-operable. Make sure to call ufshcd_enable_auto_bkops() whenever the * host is idle so that BKOPS are managed effectively without any negative * impacts. * * Returns zero on success, non-zero on failure. */ static int ufshcd_disable_auto_bkops(struct ufs_hba *hba) { int err = 0; if (!hba->auto_bkops_enabled) goto out; /* * If host assisted BKOPs is to be enabled, make sure * urgent bkops exception is allowed. */ err = ufshcd_enable_ee(hba, MASK_EE_URGENT_BKOPS); if (err) { dev_err(hba->dev, "%s: failed to enable exception event %d\n", __func__, err); goto out; } err = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_CLEAR_FLAG, QUERY_FLAG_IDN_BKOPS_EN, NULL); if (err) { dev_err(hba->dev, "%s: failed to disable bkops %d\n", __func__, err); ufshcd_disable_ee(hba, MASK_EE_URGENT_BKOPS); goto out; } hba->auto_bkops_enabled = false; trace_ufshcd_auto_bkops_state(dev_name(hba->dev), "Disabled"); out: return err; } /** * ufshcd_force_reset_auto_bkops - force reset auto bkops state * @hba: per adapter instance * * After a device reset the device may toggle the BKOPS_EN flag * to default value. The s/w tracking variables should be updated * as well. This function would change the auto-bkops state based on * UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND. */ static void ufshcd_force_reset_auto_bkops(struct ufs_hba *hba) { if (ufshcd_keep_autobkops_enabled_except_suspend(hba)) { hba->auto_bkops_enabled = false; hba->ee_ctrl_mask |= MASK_EE_URGENT_BKOPS; ufshcd_enable_auto_bkops(hba); } else { hba->auto_bkops_enabled = true; hba->ee_ctrl_mask &= ~MASK_EE_URGENT_BKOPS; ufshcd_disable_auto_bkops(hba); } } static inline int ufshcd_get_bkops_status(struct ufs_hba *hba, u32 *status) { return ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR, QUERY_ATTR_IDN_BKOPS_STATUS, 0, 0, status); } /** * ufshcd_bkops_ctrl - control the auto bkops based on current bkops status * @hba: per-adapter instance * @status: bkops_status value * * Read the bkops_status from the UFS device and Enable fBackgroundOpsEn * flag in the device to permit background operations if the device * bkops_status is greater than or equal to "status" argument passed to * this function, disable otherwise. * * Returns 0 for success, non-zero in case of failure. * * NOTE: Caller of this function can check the "hba->auto_bkops_enabled" flag * to know whether auto bkops is enabled or disabled after this function * returns control to it. */ static int ufshcd_bkops_ctrl(struct ufs_hba *hba, enum bkops_status status) { int err; u32 curr_status = 0; err = ufshcd_get_bkops_status(hba, &curr_status); if (err) { dev_err(hba->dev, "%s: failed to get BKOPS status %d\n", __func__, err); goto out; } else if (curr_status > BKOPS_STATUS_MAX) { dev_err(hba->dev, "%s: invalid BKOPS status %d\n", __func__, curr_status); err = -EINVAL; goto out; } if (curr_status >= status) err = ufshcd_enable_auto_bkops(hba); else err = ufshcd_disable_auto_bkops(hba); out: return err; } /** * ufshcd_urgent_bkops - handle urgent bkops exception event * @hba: per-adapter instance * * Enable fBackgroundOpsEn flag in the device to permit background * operations. * * If BKOPs is enabled, this function returns 0, 1 if the bkops in not enabled * and negative error value for any other failure. */ static int ufshcd_urgent_bkops(struct ufs_hba *hba) { return ufshcd_bkops_ctrl(hba, hba->urgent_bkops_lvl); } static inline int ufshcd_get_ee_status(struct ufs_hba *hba, u32 *status) { return ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR, QUERY_ATTR_IDN_EE_STATUS, 0, 0, status); } static void ufshcd_bkops_exception_event_handler(struct ufs_hba *hba) { int err; u32 curr_status = 0; if (hba->is_urgent_bkops_lvl_checked) goto enable_auto_bkops; err = ufshcd_get_bkops_status(hba, &curr_status); if (err) { dev_err(hba->dev, "%s: failed to get BKOPS status %d\n", __func__, err); goto out; } /* * We are seeing that some devices are raising the urgent bkops * exception events even when BKOPS status doesn't indicate performace * impacted or critical. Handle these device by determining their urgent * bkops status at runtime. */ if (curr_status < BKOPS_STATUS_PERF_IMPACT) { dev_err(hba->dev, "%s: device raised urgent BKOPS exception for bkops status %d\n", __func__, curr_status); /* update the current status as the urgent bkops level */ hba->urgent_bkops_lvl = curr_status; hba->is_urgent_bkops_lvl_checked = true; } enable_auto_bkops: err = ufshcd_enable_auto_bkops(hba); out: if (err < 0) dev_err(hba->dev, "%s: failed to handle urgent bkops %d\n", __func__, err); } /** * ufshcd_exception_event_handler - handle exceptions raised by device * @work: pointer to work data * * Read bExceptionEventStatus attribute from the device and handle the * exception event accordingly. */ static void ufshcd_exception_event_handler(struct work_struct *work) { struct ufs_hba *hba; int err; u32 status = 0; hba = container_of(work, struct ufs_hba, eeh_work); pm_runtime_get_sync(hba->dev); scsi_block_requests(hba->host); err = ufshcd_get_ee_status(hba, &status); if (err) { dev_err(hba->dev, "%s: failed to get exception status %d\n", __func__, err); goto out; } status &= hba->ee_ctrl_mask; if (status & MASK_EE_URGENT_BKOPS) ufshcd_bkops_exception_event_handler(hba); out: scsi_unblock_requests(hba->host); pm_runtime_put_sync(hba->dev); return; } /* Complete requests that have door-bell cleared */ static void ufshcd_complete_requests(struct ufs_hba *hba) { ufshcd_transfer_req_compl(hba); ufshcd_tmc_handler(hba); } /** * ufshcd_quirk_dl_nac_errors - This function checks if error handling is * to recover from the DL NAC errors or not. * @hba: per-adapter instance * * Returns true if error handling is required, false otherwise */ static bool ufshcd_quirk_dl_nac_errors(struct ufs_hba *hba) { unsigned long flags; bool err_handling = true; spin_lock_irqsave(hba->host->host_lock, flags); /* * UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS only workaround the * device fatal error and/or DL NAC & REPLAY timeout errors. */ if (hba->saved_err & (CONTROLLER_FATAL_ERROR | SYSTEM_BUS_FATAL_ERROR)) goto out; if ((hba->saved_err & DEVICE_FATAL_ERROR) || ((hba->saved_err & UIC_ERROR) && (hba->saved_uic_err & UFSHCD_UIC_DL_TCx_REPLAY_ERROR))) goto out; if ((hba->saved_err & UIC_ERROR) && (hba->saved_uic_err & UFSHCD_UIC_DL_NAC_RECEIVED_ERROR)) { int err; /* * wait for 50ms to see if we can get any other errors or not. */ spin_unlock_irqrestore(hba->host->host_lock, flags); msleep(50); spin_lock_irqsave(hba->host->host_lock, flags); /* * now check if we have got any other severe errors other than * DL NAC error? */ if ((hba->saved_err & INT_FATAL_ERRORS) || ((hba->saved_err & UIC_ERROR) && (hba->saved_uic_err & ~UFSHCD_UIC_DL_NAC_RECEIVED_ERROR))) goto out; /* * As DL NAC is the only error received so far, send out NOP * command to confirm if link is still active or not. * - If we don't get any response then do error recovery. * - If we get response then clear the DL NAC error bit. */ spin_unlock_irqrestore(hba->host->host_lock, flags); err = ufshcd_verify_dev_init(hba); spin_lock_irqsave(hba->host->host_lock, flags); if (err) goto out; /* Link seems to be alive hence ignore the DL NAC errors */ if (hba->saved_uic_err == UFSHCD_UIC_DL_NAC_RECEIVED_ERROR) hba->saved_err &= ~UIC_ERROR; /* clear NAC error */ hba->saved_uic_err &= ~UFSHCD_UIC_DL_NAC_RECEIVED_ERROR; if (!hba->saved_uic_err) { err_handling = false; goto out; } } out: spin_unlock_irqrestore(hba->host->host_lock, flags); return err_handling; } /** * ufshcd_err_handler - handle UFS errors that require s/w attention * @work: pointer to work structure */ static void ufshcd_err_handler(struct work_struct *work) { struct ufs_hba *hba; unsigned long flags; u32 err_xfer = 0; u32 err_tm = 0; int err = 0; int tag; bool needs_reset = false; hba = container_of(work, struct ufs_hba, eh_work); pm_runtime_get_sync(hba->dev); ufshcd_hold(hba, false); spin_lock_irqsave(hba->host->host_lock, flags); if (hba->ufshcd_state == UFSHCD_STATE_RESET) goto out; hba->ufshcd_state = UFSHCD_STATE_RESET; ufshcd_set_eh_in_progress(hba); /* Complete requests that have door-bell cleared by h/w */ ufshcd_complete_requests(hba); if (hba->dev_quirks & UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS) { bool ret; spin_unlock_irqrestore(hba->host->host_lock, flags); /* release the lock as ufshcd_quirk_dl_nac_errors() may sleep */ ret = ufshcd_quirk_dl_nac_errors(hba); spin_lock_irqsave(hba->host->host_lock, flags); if (!ret) goto skip_err_handling; } if ((hba->saved_err & INT_FATAL_ERRORS) || ((hba->saved_err & UIC_ERROR) && (hba->saved_uic_err & (UFSHCD_UIC_DL_PA_INIT_ERROR | UFSHCD_UIC_DL_NAC_RECEIVED_ERROR | UFSHCD_UIC_DL_TCx_REPLAY_ERROR)))) needs_reset = true; /* * if host reset is required then skip clearing the pending * transfers forcefully because they will automatically get * cleared after link startup. */ if (needs_reset) goto skip_pending_xfer_clear; /* release lock as clear command might sleep */ spin_unlock_irqrestore(hba->host->host_lock, flags); /* Clear pending transfer requests */ for_each_set_bit(tag, &hba->outstanding_reqs, hba->nutrs) { if (ufshcd_clear_cmd(hba, tag)) { err_xfer = true; goto lock_skip_pending_xfer_clear; } } /* Clear pending task management requests */ for_each_set_bit(tag, &hba->outstanding_tasks, hba->nutmrs) { if (ufshcd_clear_tm_cmd(hba, tag)) { err_tm = true; goto lock_skip_pending_xfer_clear; } } lock_skip_pending_xfer_clear: spin_lock_irqsave(hba->host->host_lock, flags); /* Complete the requests that are cleared by s/w */ ufshcd_complete_requests(hba); if (err_xfer || err_tm) needs_reset = true; skip_pending_xfer_clear: /* Fatal errors need reset */ if (needs_reset) { unsigned long max_doorbells = (1UL << hba->nutrs) - 1; /* * ufshcd_reset_and_restore() does the link reinitialization * which will need atleast one empty doorbell slot to send the * device management commands (NOP and query commands). * If there is no slot empty at this moment then free up last * slot forcefully. */ if (hba->outstanding_reqs == max_doorbells) __ufshcd_transfer_req_compl(hba, (1UL << (hba->nutrs - 1))); spin_unlock_irqrestore(hba->host->host_lock, flags); err = ufshcd_reset_and_restore(hba); spin_lock_irqsave(hba->host->host_lock, flags); if (err) { dev_err(hba->dev, "%s: reset and restore failed\n", __func__); hba->ufshcd_state = UFSHCD_STATE_ERROR; } /* * Inform scsi mid-layer that we did reset and allow to handle * Unit Attention properly. */ scsi_report_bus_reset(hba->host, 0); hba->saved_err = 0; hba->saved_uic_err = 0; } skip_err_handling: if (!needs_reset) { hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL; if (hba->saved_err || hba->saved_uic_err) dev_err_ratelimited(hba->dev, "%s: exit: saved_err 0x%x saved_uic_err 0x%x", __func__, hba->saved_err, hba->saved_uic_err); } ufshcd_clear_eh_in_progress(hba); out: spin_unlock_irqrestore(hba->host->host_lock, flags); ufshcd_scsi_unblock_requests(hba); ufshcd_release(hba); pm_runtime_put_sync(hba->dev); } static void ufshcd_update_uic_reg_hist(struct ufs_uic_err_reg_hist *reg_hist, u32 reg) { reg_hist->reg[reg_hist->pos] = reg; reg_hist->tstamp[reg_hist->pos] = ktime_get(); reg_hist->pos = (reg_hist->pos + 1) % UIC_ERR_REG_HIST_LENGTH; } /** * ufshcd_update_uic_error - check and set fatal UIC error flags. * @hba: per-adapter instance */ static void ufshcd_update_uic_error(struct ufs_hba *hba) { u32 reg; /* PHY layer lane error */ reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER); /* Ignore LINERESET indication, as this is not an error */ if ((reg & UIC_PHY_ADAPTER_LAYER_ERROR) && (reg & UIC_PHY_ADAPTER_LAYER_LANE_ERR_MASK)) { /* * To know whether this error is fatal or not, DB timeout * must be checked but this error is handled separately. */ dev_dbg(hba->dev, "%s: UIC Lane error reported\n", __func__); ufshcd_update_uic_reg_hist(&hba->ufs_stats.pa_err, reg); } /* PA_INIT_ERROR is fatal and needs UIC reset */ reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DATA_LINK_LAYER); if (reg) ufshcd_update_uic_reg_hist(&hba->ufs_stats.dl_err, reg); if (reg & UIC_DATA_LINK_LAYER_ERROR_PA_INIT) hba->uic_error |= UFSHCD_UIC_DL_PA_INIT_ERROR; else if (hba->dev_quirks & UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS) { if (reg & UIC_DATA_LINK_LAYER_ERROR_NAC_RECEIVED) hba->uic_error |= UFSHCD_UIC_DL_NAC_RECEIVED_ERROR; else if (reg & UIC_DATA_LINK_LAYER_ERROR_TCx_REPLAY_TIMEOUT) hba->uic_error |= UFSHCD_UIC_DL_TCx_REPLAY_ERROR; } /* UIC NL/TL/DME errors needs software retry */ reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_NETWORK_LAYER); if (reg) { ufshcd_update_uic_reg_hist(&hba->ufs_stats.nl_err, reg); hba->uic_error |= UFSHCD_UIC_NL_ERROR; } reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_TRANSPORT_LAYER); if (reg) { ufshcd_update_uic_reg_hist(&hba->ufs_stats.tl_err, reg); hba->uic_error |= UFSHCD_UIC_TL_ERROR; } reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DME); if (reg) { ufshcd_update_uic_reg_hist(&hba->ufs_stats.dme_err, reg); hba->uic_error |= UFSHCD_UIC_DME_ERROR; } dev_dbg(hba->dev, "%s: UIC error flags = 0x%08x\n", __func__, hba->uic_error); } /** * ufshcd_check_errors - Check for errors that need s/w attention * @hba: per-adapter instance */ static void ufshcd_check_errors(struct ufs_hba *hba) { bool queue_eh_work = false; if (hba->errors & INT_FATAL_ERRORS) queue_eh_work = true; if (hba->errors & UIC_ERROR) { hba->uic_error = 0; ufshcd_update_uic_error(hba); if (hba->uic_error) queue_eh_work = true; } if (queue_eh_work) { /* * update the transfer error masks to sticky bits, let's do this * irrespective of current ufshcd_state. */ hba->saved_err |= hba->errors; hba->saved_uic_err |= hba->uic_error; /* handle fatal errors only when link is functional */ if (hba->ufshcd_state == UFSHCD_STATE_OPERATIONAL) { /* block commands from scsi mid-layer */ ufshcd_scsi_block_requests(hba); hba->ufshcd_state = UFSHCD_STATE_EH_SCHEDULED; /* dump controller state before resetting */ if (hba->saved_err & (INT_FATAL_ERRORS | UIC_ERROR)) { bool pr_prdt = !!(hba->saved_err & SYSTEM_BUS_FATAL_ERROR); dev_err(hba->dev, "%s: saved_err 0x%x saved_uic_err 0x%x\n", __func__, hba->saved_err, hba->saved_uic_err); ufshcd_print_host_regs(hba); ufshcd_print_pwr_info(hba); ufshcd_print_tmrs(hba, hba->outstanding_tasks); ufshcd_print_trs(hba, hba->outstanding_reqs, pr_prdt); } schedule_work(&hba->eh_work); } } /* * if (!queue_eh_work) - * Other errors are either non-fatal where host recovers * itself without s/w intervention or errors that will be * handled by the SCSI core layer. */ } /** * ufshcd_tmc_handler - handle task management function completion * @hba: per adapter instance */ static void ufshcd_tmc_handler(struct ufs_hba *hba) { u32 tm_doorbell; tm_doorbell = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL); hba->tm_condition = tm_doorbell ^ hba->outstanding_tasks; wake_up(&hba->tm_wq); } /** * ufshcd_sl_intr - Interrupt service routine * @hba: per adapter instance * @intr_status: contains interrupts generated by the controller */ static void ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status) { hba->errors = UFSHCD_ERROR_MASK & intr_status; if (hba->errors) ufshcd_check_errors(hba); if (intr_status & UFSHCD_UIC_MASK) ufshcd_uic_cmd_compl(hba, intr_status); if (intr_status & UTP_TASK_REQ_COMPL) ufshcd_tmc_handler(hba); if (intr_status & UTP_TRANSFER_REQ_COMPL) ufshcd_transfer_req_compl(hba); } /** * ufshcd_intr - Main interrupt service routine * @irq: irq number * @__hba: pointer to adapter instance * * Returns IRQ_HANDLED - If interrupt is valid * IRQ_NONE - If invalid interrupt */ static irqreturn_t ufshcd_intr(int irq, void *__hba) { u32 intr_status, enabled_intr_status; irqreturn_t retval = IRQ_NONE; struct ufs_hba *hba = __hba; int retries = hba->nutrs; spin_lock(hba->host->host_lock); intr_status = ufshcd_readl(hba, REG_INTERRUPT_STATUS); /* * There could be max of hba->nutrs reqs in flight and in worst case * if the reqs get finished 1 by 1 after the interrupt status is * read, make sure we handle them by checking the interrupt status * again in a loop until we process all of the reqs before returning. */ do { enabled_intr_status = intr_status & ufshcd_readl(hba, REG_INTERRUPT_ENABLE); if (intr_status) ufshcd_writel(hba, intr_status, REG_INTERRUPT_STATUS); if (enabled_intr_status) { ufshcd_sl_intr(hba, enabled_intr_status); retval = IRQ_HANDLED; } intr_status = ufshcd_readl(hba, REG_INTERRUPT_STATUS); } while (intr_status && --retries); spin_unlock(hba->host->host_lock); return retval; } static int ufshcd_clear_tm_cmd(struct ufs_hba *hba, int tag) { int err = 0; u32 mask = 1 << tag; unsigned long flags; if (!test_bit(tag, &hba->outstanding_tasks)) goto out; spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_utmrl_clear(hba, tag); spin_unlock_irqrestore(hba->host->host_lock, flags); /* poll for max. 1 sec to clear door bell register by h/w */ err = ufshcd_wait_for_register(hba, REG_UTP_TASK_REQ_DOOR_BELL, mask, 0, 1000, 1000, true); out: return err; } static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba, struct utp_task_req_desc *treq, u8 tm_function) { struct Scsi_Host *host = hba->host; unsigned long flags; int free_slot, task_tag, err; /* * Get free slot, sleep if slots are unavailable. * Even though we use wait_event() which sleeps indefinitely, * the maximum wait time is bounded by %TM_CMD_TIMEOUT. */ wait_event(hba->tm_tag_wq, ufshcd_get_tm_free_slot(hba, &free_slot)); ufshcd_hold(hba, false); spin_lock_irqsave(host->host_lock, flags); task_tag = hba->nutrs + free_slot; treq->req_header.dword_0 |= cpu_to_be32(task_tag); memcpy(hba->utmrdl_base_addr + free_slot, treq, sizeof(*treq)); ufshcd_vops_setup_task_mgmt(hba, free_slot, tm_function); /* send command to the controller */ __set_bit(free_slot, &hba->outstanding_tasks); /* Make sure descriptors are ready before ringing the task doorbell */ wmb(); ufshcd_writel(hba, 1 << free_slot, REG_UTP_TASK_REQ_DOOR_BELL); /* Make sure that doorbell is committed immediately */ wmb(); spin_unlock_irqrestore(host->host_lock, flags); ufshcd_add_tm_upiu_trace(hba, task_tag, "tm_send"); /* wait until the task management command is completed */ err = wait_event_timeout(hba->tm_wq, test_bit(free_slot, &hba->tm_condition), msecs_to_jiffies(TM_CMD_TIMEOUT)); if (!err) { ufshcd_add_tm_upiu_trace(hba, task_tag, "tm_complete_err"); dev_err(hba->dev, "%s: task management cmd 0x%.2x timed-out\n", __func__, tm_function); if (ufshcd_clear_tm_cmd(hba, free_slot)) dev_WARN(hba->dev, "%s: unable clear tm cmd (slot %d) after timeout\n", __func__, free_slot); err = -ETIMEDOUT; } else { err = 0; memcpy(treq, hba->utmrdl_base_addr + free_slot, sizeof(*treq)); ufshcd_add_tm_upiu_trace(hba, task_tag, "tm_complete"); spin_lock_irqsave(hba->host->host_lock, flags); __clear_bit(free_slot, &hba->outstanding_tasks); spin_unlock_irqrestore(hba->host->host_lock, flags); } clear_bit(free_slot, &hba->tm_condition); ufshcd_put_tm_slot(hba, free_slot); wake_up(&hba->tm_tag_wq); ufshcd_release(hba); return err; } /** * ufshcd_issue_tm_cmd - issues task management commands to controller * @hba: per adapter instance * @lun_id: LUN ID to which TM command is sent * @task_id: task ID to which the TM command is applicable * @tm_function: task management function opcode * @tm_response: task management service response return value * * Returns non-zero value on error, zero on success. */ static int ufshcd_issue_tm_cmd(struct ufs_hba *hba, int lun_id, int task_id, u8 tm_function, u8 *tm_response) { struct utp_task_req_desc treq = { { 0 }, }; int ocs_value, err; /* Configure task request descriptor */ treq.header.dword_0 = cpu_to_le32(UTP_REQ_DESC_INT_CMD); treq.header.dword_2 = cpu_to_le32(OCS_INVALID_COMMAND_STATUS); /* Configure task request UPIU */ treq.req_header.dword_0 = cpu_to_be32(lun_id << 8) | cpu_to_be32(UPIU_TRANSACTION_TASK_REQ << 24); treq.req_header.dword_1 = cpu_to_be32(tm_function << 16); /* * The host shall provide the same value for LUN field in the basic * header and for Input Parameter. */ treq.input_param1 = cpu_to_be32(lun_id); treq.input_param2 = cpu_to_be32(task_id); err = __ufshcd_issue_tm_cmd(hba, &treq, tm_function); if (err == -ETIMEDOUT) return err; ocs_value = le32_to_cpu(treq.header.dword_2) & MASK_OCS; if (ocs_value != OCS_SUCCESS) dev_err(hba->dev, "%s: failed, ocs = 0x%x\n", __func__, ocs_value); else if (tm_response) *tm_response = be32_to_cpu(treq.output_param1) & MASK_TM_SERVICE_RESP; return err; } /** * ufshcd_issue_devman_upiu_cmd - API for sending "utrd" type requests * @hba: per-adapter instance * @req_upiu: upiu request * @rsp_upiu: upiu reply * @msgcode: message code, one of UPIU Transaction Codes Initiator to Target * @desc_buff: pointer to descriptor buffer, NULL if NA * @buff_len: descriptor size, 0 if NA * @desc_op: descriptor operation * * Those type of requests uses UTP Transfer Request Descriptor - utrd. * Therefore, it "rides" the device management infrastructure: uses its tag and * tasks work queues. * * Since there is only one available tag for device management commands, * the caller is expected to hold the hba->dev_cmd.lock mutex. */ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba, struct utp_upiu_req *req_upiu, struct utp_upiu_req *rsp_upiu, u8 *desc_buff, int *buff_len, int cmd_type, enum query_opcode desc_op) { struct ufshcd_lrb *lrbp; int err = 0; int tag; struct completion wait; unsigned long flags; u32 upiu_flags; down_read(&hba->clk_scaling_lock); wait_event(hba->dev_cmd.tag_wq, ufshcd_get_dev_cmd_tag(hba, &tag)); init_completion(&wait); lrbp = &hba->lrb[tag]; WARN_ON(lrbp->cmd); lrbp->cmd = NULL; lrbp->sense_bufflen = 0; lrbp->sense_buffer = NULL; lrbp->task_tag = tag; lrbp->lun = 0; lrbp->intr_cmd = true; hba->dev_cmd.type = cmd_type; switch (hba->ufs_version) { case UFSHCI_VERSION_10: case UFSHCI_VERSION_11: lrbp->command_type = UTP_CMD_TYPE_DEV_MANAGE; break; default: lrbp->command_type = UTP_CMD_TYPE_UFS_STORAGE; break; } /* update the task tag in the request upiu */ req_upiu->header.dword_0 |= cpu_to_be32(tag); ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags, DMA_NONE); /* just copy the upiu request as it is */ memcpy(lrbp->ucd_req_ptr, req_upiu, sizeof(*lrbp->ucd_req_ptr)); if (desc_buff && desc_op == UPIU_QUERY_OPCODE_WRITE_DESC) { /* The Data Segment Area is optional depending upon the query * function value. for WRITE DESCRIPTOR, the data segment * follows right after the tsf. */ memcpy(lrbp->ucd_req_ptr + 1, desc_buff, *buff_len); *buff_len = 0; } memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); hba->dev_cmd.complete = &wait; /* Make sure descriptors are ready before ringing the doorbell */ wmb(); spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_send_command(hba, tag); spin_unlock_irqrestore(hba->host->host_lock, flags); /* * ignore the returning value here - ufshcd_check_query_response is * bound to fail since dev_cmd.query and dev_cmd.type were left empty. * read the response directly ignoring all errors. */ ufshcd_wait_for_dev_cmd(hba, lrbp, QUERY_REQ_TIMEOUT); /* just copy the upiu response as it is */ memcpy(rsp_upiu, lrbp->ucd_rsp_ptr, sizeof(*rsp_upiu)); ufshcd_put_dev_cmd_tag(hba, tag); wake_up(&hba->dev_cmd.tag_wq); up_read(&hba->clk_scaling_lock); return err; } /** * ufshcd_exec_raw_upiu_cmd - API function for sending raw upiu commands * @hba: per-adapter instance * @req_upiu: upiu request * @rsp_upiu: upiu reply - only 8 DW as we do not support scsi commands * @msgcode: message code, one of UPIU Transaction Codes Initiator to Target * @desc_buff: pointer to descriptor buffer, NULL if NA * @buff_len: descriptor size, 0 if NA * @desc_op: descriptor operation * * Supports UTP Transfer requests (nop and query), and UTP Task * Management requests. * It is up to the caller to fill the upiu conent properly, as it will * be copied without any further input validations. */ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, struct utp_upiu_req *req_upiu, struct utp_upiu_req *rsp_upiu, int msgcode, u8 *desc_buff, int *buff_len, enum query_opcode desc_op) { int err; int cmd_type = DEV_CMD_TYPE_QUERY; struct utp_task_req_desc treq = { { 0 }, }; int ocs_value; u8 tm_f = be32_to_cpu(req_upiu->header.dword_1) >> 16 & MASK_TM_FUNC; if (desc_buff && desc_op != UPIU_QUERY_OPCODE_WRITE_DESC) { err = -ENOTSUPP; goto out; } switch (msgcode) { case UPIU_TRANSACTION_NOP_OUT: cmd_type = DEV_CMD_TYPE_NOP; /* fall through */ case UPIU_TRANSACTION_QUERY_REQ: ufshcd_hold(hba, false); mutex_lock(&hba->dev_cmd.lock); err = ufshcd_issue_devman_upiu_cmd(hba, req_upiu, rsp_upiu, desc_buff, buff_len, cmd_type, desc_op); mutex_unlock(&hba->dev_cmd.lock); ufshcd_release(hba); break; case UPIU_TRANSACTION_TASK_REQ: treq.header.dword_0 = cpu_to_le32(UTP_REQ_DESC_INT_CMD); treq.header.dword_2 = cpu_to_le32(OCS_INVALID_COMMAND_STATUS); memcpy(&treq.req_header, req_upiu, sizeof(*req_upiu)); err = __ufshcd_issue_tm_cmd(hba, &treq, tm_f); if (err == -ETIMEDOUT) break; ocs_value = le32_to_cpu(treq.header.dword_2) & MASK_OCS; if (ocs_value != OCS_SUCCESS) { dev_err(hba->dev, "%s: failed, ocs = 0x%x\n", __func__, ocs_value); break; } memcpy(rsp_upiu, &treq.rsp_header, sizeof(*rsp_upiu)); break; default: err = -EINVAL; break; } out: return err; } /** * ufshcd_eh_device_reset_handler - device reset handler registered to * scsi layer. * @cmd: SCSI command pointer * * Returns SUCCESS/FAILED */ static int ufshcd_eh_device_reset_handler(struct scsi_cmnd *cmd) { struct Scsi_Host *host; struct ufs_hba *hba; unsigned int tag; u32 pos; int err; u8 resp = 0xF; struct ufshcd_lrb *lrbp; unsigned long flags; host = cmd->device->host; hba = shost_priv(host); tag = cmd->request->tag; lrbp = &hba->lrb[tag]; err = ufshcd_issue_tm_cmd(hba, lrbp->lun, 0, UFS_LOGICAL_RESET, &resp); if (err || resp != UPIU_TASK_MANAGEMENT_FUNC_COMPL) { if (!err) err = resp; goto out; } /* clear the commands that were pending for corresponding LUN */ for_each_set_bit(pos, &hba->outstanding_reqs, hba->nutrs) { if (hba->lrb[pos].lun == lrbp->lun) { err = ufshcd_clear_cmd(hba, pos); if (err) break; } } spin_lock_irqsave(host->host_lock, flags); ufshcd_transfer_req_compl(hba); spin_unlock_irqrestore(host->host_lock, flags); out: hba->req_abort_count = 0; if (!err) { err = SUCCESS; } else { dev_err(hba->dev, "%s: failed with err %d\n", __func__, err); err = FAILED; } return err; } static void ufshcd_set_req_abort_skip(struct ufs_hba *hba, unsigned long bitmap) { struct ufshcd_lrb *lrbp; int tag; for_each_set_bit(tag, &bitmap, hba->nutrs) { lrbp = &hba->lrb[tag]; lrbp->req_abort_skip = true; } } /** * ufshcd_abort - abort a specific command * @cmd: SCSI command pointer * * Abort the pending command in device by sending UFS_ABORT_TASK task management * command, and in host controller by clearing the door-bell register. There can * be race between controller sending the command to the device while abort is * issued. To avoid that, first issue UFS_QUERY_TASK to check if the command is * really issued and then try to abort it. * * Returns SUCCESS/FAILED */ static int ufshcd_abort(struct scsi_cmnd *cmd) { struct Scsi_Host *host; struct ufs_hba *hba; unsigned long flags; unsigned int tag; int err = 0; int poll_cnt; u8 resp = 0xF; struct ufshcd_lrb *lrbp; u32 reg; host = cmd->device->host; hba = shost_priv(host); tag = cmd->request->tag; lrbp = &hba->lrb[tag]; if (!ufshcd_valid_tag(hba, tag)) { dev_err(hba->dev, "%s: invalid command tag %d: cmd=0x%p, cmd->request=0x%p", __func__, tag, cmd, cmd->request); BUG(); } /* * Task abort to the device W-LUN is illegal. When this command * will fail, due to spec violation, scsi err handling next step * will be to send LU reset which, again, is a spec violation. * To avoid these unnecessary/illegal step we skip to the last error * handling stage: reset and restore. */ if (lrbp->lun == UFS_UPIU_UFS_DEVICE_WLUN) return ufshcd_eh_host_reset_handler(cmd); ufshcd_hold(hba, false); reg = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); /* If command is already aborted/completed, return SUCCESS */ if (!(test_bit(tag, &hba->outstanding_reqs))) { dev_err(hba->dev, "%s: cmd at tag %d already completed, outstanding=0x%lx, doorbell=0x%x\n", __func__, tag, hba->outstanding_reqs, reg); goto out; } if (!(reg & (1 << tag))) { dev_err(hba->dev, "%s: cmd was completed, but without a notifying intr, tag = %d", __func__, tag); } /* Print Transfer Request of aborted task */ dev_err(hba->dev, "%s: Device abort task at tag %d\n", __func__, tag); /* * Print detailed info about aborted request. * As more than one request might get aborted at the same time, * print full information only for the first aborted request in order * to reduce repeated printouts. For other aborted requests only print * basic details. */ scsi_print_command(hba->lrb[tag].cmd); if (!hba->req_abort_count) { ufshcd_print_host_regs(hba); ufshcd_print_host_state(hba); ufshcd_print_pwr_info(hba); ufshcd_print_trs(hba, 1 << tag, true); } else { ufshcd_print_trs(hba, 1 << tag, false); } hba->req_abort_count++; /* Skip task abort in case previous aborts failed and report failure */ if (lrbp->req_abort_skip) { err = -EIO; goto out; } for (poll_cnt = 100; poll_cnt; poll_cnt--) { err = ufshcd_issue_tm_cmd(hba, lrbp->lun, lrbp->task_tag, UFS_QUERY_TASK, &resp); if (!err && resp == UPIU_TASK_MANAGEMENT_FUNC_SUCCEEDED) { /* cmd pending in the device */ dev_err(hba->dev, "%s: cmd pending in the device. tag = %d\n", __func__, tag); break; } else if (!err && resp == UPIU_TASK_MANAGEMENT_FUNC_COMPL) { /* * cmd not pending in the device, check if it is * in transition. */ dev_err(hba->dev, "%s: cmd at tag %d not pending in the device.\n", __func__, tag); reg = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); if (reg & (1 << tag)) { /* sleep for max. 200us to stabilize */ usleep_range(100, 200); continue; } /* command completed already */ dev_err(hba->dev, "%s: cmd at tag %d successfully cleared from DB.\n", __func__, tag); goto out; } else { dev_err(hba->dev, "%s: no response from device. tag = %d, err %d\n", __func__, tag, err); if (!err) err = resp; /* service response error */ goto out; } } if (!poll_cnt) { err = -EBUSY; goto out; } err = ufshcd_issue_tm_cmd(hba, lrbp->lun, lrbp->task_tag, UFS_ABORT_TASK, &resp); if (err || resp != UPIU_TASK_MANAGEMENT_FUNC_COMPL) { if (!err) { err = resp; /* service response error */ dev_err(hba->dev, "%s: issued. tag = %d, err %d\n", __func__, tag, err); } goto out; } err = ufshcd_clear_cmd(hba, tag); if (err) { dev_err(hba->dev, "%s: Failed clearing cmd at tag %d, err %d\n", __func__, tag, err); goto out; } scsi_dma_unmap(cmd); spin_lock_irqsave(host->host_lock, flags); ufshcd_outstanding_req_clear(hba, tag); hba->lrb[tag].cmd = NULL; spin_unlock_irqrestore(host->host_lock, flags); clear_bit_unlock(tag, &hba->lrb_in_use); wake_up(&hba->dev_cmd.tag_wq); out: if (!err) { err = SUCCESS; } else { dev_err(hba->dev, "%s: failed with err %d\n", __func__, err); ufshcd_set_req_abort_skip(hba, hba->outstanding_reqs); err = FAILED; } /* * This ufshcd_release() corresponds to the original scsi cmd that got * aborted here (as we won't get any IRQ for it). */ ufshcd_release(hba); return err; } /** * ufshcd_host_reset_and_restore - reset and restore host controller * @hba: per-adapter instance * * Note that host controller reset may issue DME_RESET to * local and remote (device) Uni-Pro stack and the attributes * are reset to default state. * * Returns zero on success, non-zero on failure */ static int ufshcd_host_reset_and_restore(struct ufs_hba *hba) { int err; unsigned long flags; /* Reset the host controller */ spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_hba_stop(hba, false); spin_unlock_irqrestore(hba->host->host_lock, flags); /* scale up clocks to max frequency before full reinitialization */ ufshcd_scale_clks(hba, true); err = ufshcd_hba_enable(hba); if (err) goto out; /* Establish the link again and restore the device */ err = ufshcd_probe_hba(hba); if (!err && (hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL)) err = -EIO; out: if (err) dev_err(hba->dev, "%s: Host init failed %d\n", __func__, err); return err; } /** * ufshcd_reset_and_restore - reset and re-initialize host/device * @hba: per-adapter instance * * Reset and recover device, host and re-establish link. This * is helpful to recover the communication in fatal error conditions. * * Returns zero on success, non-zero on failure */ static int ufshcd_reset_and_restore(struct ufs_hba *hba) { int err = 0; unsigned long flags; int retries = MAX_HOST_RESET_RETRIES; do { err = ufshcd_host_reset_and_restore(hba); } while (err && --retries); /* * After reset the door-bell might be cleared, complete * outstanding requests in s/w here. */ spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_transfer_req_compl(hba); ufshcd_tmc_handler(hba); spin_unlock_irqrestore(hba->host->host_lock, flags); return err; } /** * ufshcd_eh_host_reset_handler - host reset handler registered to scsi layer * @cmd: SCSI command pointer * * Returns SUCCESS/FAILED */ static int ufshcd_eh_host_reset_handler(struct scsi_cmnd *cmd) { int err; unsigned long flags; struct ufs_hba *hba; hba = shost_priv(cmd->device->host); ufshcd_hold(hba, false); /* * Check if there is any race with fatal error handling. * If so, wait for it to complete. Even though fatal error * handling does reset and restore in some cases, don't assume * anything out of it. We are just avoiding race here. */ do { spin_lock_irqsave(hba->host->host_lock, flags); if (!(work_pending(&hba->eh_work) || hba->ufshcd_state == UFSHCD_STATE_RESET || hba->ufshcd_state == UFSHCD_STATE_EH_SCHEDULED)) break; spin_unlock_irqrestore(hba->host->host_lock, flags); dev_dbg(hba->dev, "%s: reset in progress\n", __func__); flush_work(&hba->eh_work); } while (1); hba->ufshcd_state = UFSHCD_STATE_RESET; ufshcd_set_eh_in_progress(hba); spin_unlock_irqrestore(hba->host->host_lock, flags); err = ufshcd_reset_and_restore(hba); spin_lock_irqsave(hba->host->host_lock, flags); if (!err) { err = SUCCESS; hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL; } else { err = FAILED; hba->ufshcd_state = UFSHCD_STATE_ERROR; } ufshcd_clear_eh_in_progress(hba); spin_unlock_irqrestore(hba->host->host_lock, flags); ufshcd_release(hba); return err; } /** * ufshcd_get_max_icc_level - calculate the ICC level * @sup_curr_uA: max. current supported by the regulator * @start_scan: row at the desc table to start scan from * @buff: power descriptor buffer * * Returns calculated max ICC level for specific regulator */ static u32 ufshcd_get_max_icc_level(int sup_curr_uA, u32 start_scan, char *buff) { int i; int curr_uA; u16 data; u16 unit; for (i = start_scan; i >= 0; i--) { data = be16_to_cpup((__be16 *)&buff[2 * i]); unit = (data & ATTR_ICC_LVL_UNIT_MASK) >> ATTR_ICC_LVL_UNIT_OFFSET; curr_uA = data & ATTR_ICC_LVL_VALUE_MASK; switch (unit) { case UFSHCD_NANO_AMP: curr_uA = curr_uA / 1000; break; case UFSHCD_MILI_AMP: curr_uA = curr_uA * 1000; break; case UFSHCD_AMP: curr_uA = curr_uA * 1000 * 1000; break; case UFSHCD_MICRO_AMP: default: break; } if (sup_curr_uA >= curr_uA) break; } if (i < 0) { i = 0; pr_err("%s: Couldn't find valid icc_level = %d", __func__, i); } return (u32)i; } /** * ufshcd_calc_icc_level - calculate the max ICC level * In case regulators are not initialized we'll return 0 * @hba: per-adapter instance * @desc_buf: power descriptor buffer to extract ICC levels from. * @len: length of desc_buff * * Returns calculated ICC level */ static u32 ufshcd_find_max_sup_active_icc_level(struct ufs_hba *hba, u8 *desc_buf, int len) { u32 icc_level = 0; if (!hba->vreg_info.vcc || !hba->vreg_info.vccq || !hba->vreg_info.vccq2) { dev_err(hba->dev, "%s: Regulator capability was not set, actvIccLevel=%d", __func__, icc_level); goto out; } if (hba->vreg_info.vcc) icc_level = ufshcd_get_max_icc_level( hba->vreg_info.vcc->max_uA, POWER_DESC_MAX_ACTV_ICC_LVLS - 1, &desc_buf[PWR_DESC_ACTIVE_LVLS_VCC_0]); if (hba->vreg_info.vccq) icc_level = ufshcd_get_max_icc_level( hba->vreg_info.vccq->max_uA, icc_level, &desc_buf[PWR_DESC_ACTIVE_LVLS_VCCQ_0]); if (hba->vreg_info.vccq2) icc_level = ufshcd_get_max_icc_level( hba->vreg_info.vccq2->max_uA, icc_level, &desc_buf[PWR_DESC_ACTIVE_LVLS_VCCQ2_0]); out: return icc_level; } static void ufshcd_init_icc_levels(struct ufs_hba *hba) { int ret; int buff_len = hba->desc_size.pwr_desc; u8 *desc_buf; desc_buf = kmalloc(buff_len, GFP_KERNEL); if (!desc_buf) return; ret = ufshcd_read_power_desc(hba, desc_buf, buff_len); if (ret) { dev_err(hba->dev, "%s: Failed reading power descriptor.len = %d ret = %d", __func__, buff_len, ret); goto out; } hba->init_prefetch_data.icc_level = ufshcd_find_max_sup_active_icc_level(hba, desc_buf, buff_len); dev_dbg(hba->dev, "%s: setting icc_level 0x%x", __func__, hba->init_prefetch_data.icc_level); ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR, QUERY_ATTR_IDN_ACTIVE_ICC_LVL, 0, 0, &hba->init_prefetch_data.icc_level); if (ret) dev_err(hba->dev, "%s: Failed configuring bActiveICCLevel = %d ret = %d", __func__, hba->init_prefetch_data.icc_level , ret); out: kfree(desc_buf); } /** * ufshcd_scsi_add_wlus - Adds required W-LUs * @hba: per-adapter instance * * UFS device specification requires the UFS devices to support 4 well known * logical units: * "REPORT_LUNS" (address: 01h) * "UFS Device" (address: 50h) * "RPMB" (address: 44h) * "BOOT" (address: 30h) * UFS device's power management needs to be controlled by "POWER CONDITION" * field of SSU (START STOP UNIT) command. But this "power condition" field * will take effect only when its sent to "UFS device" well known logical unit * hence we require the scsi_device instance to represent this logical unit in * order for the UFS host driver to send the SSU command for power management. * * We also require the scsi_device instance for "RPMB" (Replay Protected Memory * Block) LU so user space process can control this LU. User space may also * want to have access to BOOT LU. * * This function adds scsi device instances for each of all well known LUs * (except "REPORT LUNS" LU). * * Returns zero on success (all required W-LUs are added successfully), * non-zero error value on failure (if failed to add any of the required W-LU). */ static int ufshcd_scsi_add_wlus(struct ufs_hba *hba) { int ret = 0; struct scsi_device *sdev_rpmb; struct scsi_device *sdev_boot; hba->sdev_ufs_device = __scsi_add_device(hba->host, 0, 0, ufshcd_upiu_wlun_to_scsi_wlun(UFS_UPIU_UFS_DEVICE_WLUN), NULL); if (IS_ERR(hba->sdev_ufs_device)) { ret = PTR_ERR(hba->sdev_ufs_device); hba->sdev_ufs_device = NULL; goto out; } scsi_device_put(hba->sdev_ufs_device); sdev_rpmb = __scsi_add_device(hba->host, 0, 0, ufshcd_upiu_wlun_to_scsi_wlun(UFS_UPIU_RPMB_WLUN), NULL); if (IS_ERR(sdev_rpmb)) { ret = PTR_ERR(sdev_rpmb); goto remove_sdev_ufs_device; } scsi_device_put(sdev_rpmb); sdev_boot = __scsi_add_device(hba->host, 0, 0, ufshcd_upiu_wlun_to_scsi_wlun(UFS_UPIU_BOOT_WLUN), NULL); if (IS_ERR(sdev_boot)) dev_err(hba->dev, "%s: BOOT WLUN not found\n", __func__); else scsi_device_put(sdev_boot); goto out; remove_sdev_ufs_device: scsi_remove_device(hba->sdev_ufs_device); out: return ret; } static int ufs_get_device_desc(struct ufs_hba *hba, struct ufs_dev_desc *dev_desc) { int err; size_t buff_len; u8 model_index; u8 *desc_buf; buff_len = max_t(size_t, hba->desc_size.dev_desc, QUERY_DESC_MAX_SIZE + 1); desc_buf = kmalloc(buff_len, GFP_KERNEL); if (!desc_buf) { err = -ENOMEM; goto out; } err = ufshcd_read_device_desc(hba, desc_buf, hba->desc_size.dev_desc); if (err) { dev_err(hba->dev, "%s: Failed reading Device Desc. err = %d\n", __func__, err); goto out; } /* * getting vendor (manufacturerID) and Bank Index in big endian * format */ dev_desc->wmanufacturerid = desc_buf[DEVICE_DESC_PARAM_MANF_ID] << 8 | desc_buf[DEVICE_DESC_PARAM_MANF_ID + 1]; model_index = desc_buf[DEVICE_DESC_PARAM_PRDCT_NAME]; /* Zero-pad entire buffer for string termination. */ memset(desc_buf, 0, buff_len); err = ufshcd_read_string_desc(hba, model_index, desc_buf, QUERY_DESC_MAX_SIZE, true/*ASCII*/); if (err) { dev_err(hba->dev, "%s: Failed reading Product Name. err = %d\n", __func__, err); goto out; } desc_buf[QUERY_DESC_MAX_SIZE] = '\0'; strlcpy(dev_desc->model, (desc_buf + QUERY_DESC_HDR_SIZE), min_t(u8, desc_buf[QUERY_DESC_LENGTH_OFFSET], MAX_MODEL_LEN)); /* Null terminate the model string */ dev_desc->model[MAX_MODEL_LEN] = '\0'; out: kfree(desc_buf); return err; } static void ufs_fixup_device_setup(struct ufs_hba *hba, struct ufs_dev_desc *dev_desc) { struct ufs_dev_fix *f; for (f = ufs_fixups; f->quirk; f++) { if ((f->card.wmanufacturerid == dev_desc->wmanufacturerid || f->card.wmanufacturerid == UFS_ANY_VENDOR) && (STR_PRFX_EQUAL(f->card.model, dev_desc->model) || !strcmp(f->card.model, UFS_ANY_MODEL))) hba->dev_quirks |= f->quirk; } } /** * ufshcd_tune_pa_tactivate - Tunes PA_TActivate of local UniPro * @hba: per-adapter instance * * PA_TActivate parameter can be tuned manually if UniPro version is less than * 1.61. PA_TActivate needs to be greater than or equal to peerM-PHY's * RX_MIN_ACTIVATETIME_CAPABILITY attribute. This optimal value can help reduce * the hibern8 exit latency. * * Returns zero on success, non-zero error value on failure. */ static int ufshcd_tune_pa_tactivate(struct ufs_hba *hba) { int ret = 0; u32 peer_rx_min_activatetime = 0, tuned_pa_tactivate; ret = ufshcd_dme_peer_get(hba, UIC_ARG_MIB_SEL( RX_MIN_ACTIVATETIME_CAPABILITY, UIC_ARG_MPHY_RX_GEN_SEL_INDEX(0)), &peer_rx_min_activatetime); if (ret) goto out; /* make sure proper unit conversion is applied */ tuned_pa_tactivate = ((peer_rx_min_activatetime * RX_MIN_ACTIVATETIME_UNIT_US) / PA_TACTIVATE_TIME_UNIT_US); ret = ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TACTIVATE), tuned_pa_tactivate); out: return ret; } /** * ufshcd_tune_pa_hibern8time - Tunes PA_Hibern8Time of local UniPro * @hba: per-adapter instance * * PA_Hibern8Time parameter can be tuned manually if UniPro version is less than * 1.61. PA_Hibern8Time needs to be maximum of local M-PHY's * TX_HIBERN8TIME_CAPABILITY & peer M-PHY's RX_HIBERN8TIME_CAPABILITY. * This optimal value can help reduce the hibern8 exit latency. * * Returns zero on success, non-zero error value on failure. */ static int ufshcd_tune_pa_hibern8time(struct ufs_hba *hba) { int ret = 0; u32 local_tx_hibern8_time_cap = 0, peer_rx_hibern8_time_cap = 0; u32 max_hibern8_time, tuned_pa_hibern8time; ret = ufshcd_dme_get(hba, UIC_ARG_MIB_SEL(TX_HIBERN8TIME_CAPABILITY, UIC_ARG_MPHY_TX_GEN_SEL_INDEX(0)), &local_tx_hibern8_time_cap); if (ret) goto out; ret = ufshcd_dme_peer_get(hba, UIC_ARG_MIB_SEL(RX_HIBERN8TIME_CAPABILITY, UIC_ARG_MPHY_RX_GEN_SEL_INDEX(0)), &peer_rx_hibern8_time_cap); if (ret) goto out; max_hibern8_time = max(local_tx_hibern8_time_cap, peer_rx_hibern8_time_cap); /* make sure proper unit conversion is applied */ tuned_pa_hibern8time = ((max_hibern8_time * HIBERN8TIME_UNIT_US) / PA_HIBERN8_TIME_UNIT_US); ret = ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HIBERN8TIME), tuned_pa_hibern8time); out: return ret; } /** * ufshcd_quirk_tune_host_pa_tactivate - Ensures that host PA_TACTIVATE is * less than device PA_TACTIVATE time. * @hba: per-adapter instance * * Some UFS devices require host PA_TACTIVATE to be lower than device * PA_TACTIVATE, we need to enable UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE quirk * for such devices. * * Returns zero on success, non-zero error value on failure. */ static int ufshcd_quirk_tune_host_pa_tactivate(struct ufs_hba *hba) { int ret = 0; u32 granularity, peer_granularity; u32 pa_tactivate, peer_pa_tactivate; u32 pa_tactivate_us, peer_pa_tactivate_us; u8 gran_to_us_table[] = {1, 4, 8, 16, 32, 100}; ret = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_GRANULARITY), &granularity); if (ret) goto out; ret = ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_GRANULARITY), &peer_granularity); if (ret) goto out; if ((granularity < PA_GRANULARITY_MIN_VAL) || (granularity > PA_GRANULARITY_MAX_VAL)) { dev_err(hba->dev, "%s: invalid host PA_GRANULARITY %d", __func__, granularity); return -EINVAL; } if ((peer_granularity < PA_GRANULARITY_MIN_VAL) || (peer_granularity > PA_GRANULARITY_MAX_VAL)) { dev_err(hba->dev, "%s: invalid device PA_GRANULARITY %d", __func__, peer_granularity); return -EINVAL; } ret = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_TACTIVATE), &pa_tactivate); if (ret) goto out; ret = ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_TACTIVATE), &peer_pa_tactivate); if (ret) goto out; pa_tactivate_us = pa_tactivate * gran_to_us_table[granularity - 1]; peer_pa_tactivate_us = peer_pa_tactivate * gran_to_us_table[peer_granularity - 1]; if (pa_tactivate_us > peer_pa_tactivate_us) { u32 new_peer_pa_tactivate; new_peer_pa_tactivate = pa_tactivate_us / gran_to_us_table[peer_granularity - 1]; new_peer_pa_tactivate++; ret = ufshcd_dme_peer_set(hba, UIC_ARG_MIB(PA_TACTIVATE), new_peer_pa_tactivate); } out: return ret; } static void ufshcd_tune_unipro_params(struct ufs_hba *hba) { if (ufshcd_is_unipro_pa_params_tuning_req(hba)) { ufshcd_tune_pa_tactivate(hba); ufshcd_tune_pa_hibern8time(hba); } if (hba->dev_quirks & UFS_DEVICE_QUIRK_PA_TACTIVATE) /* set 1ms timeout for PA_TACTIVATE */ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TACTIVATE), 10); if (hba->dev_quirks & UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE) ufshcd_quirk_tune_host_pa_tactivate(hba); ufshcd_vops_apply_dev_quirks(hba); } static void ufshcd_clear_dbg_ufs_stats(struct ufs_hba *hba) { int err_reg_hist_size = sizeof(struct ufs_uic_err_reg_hist); hba->ufs_stats.hibern8_exit_cnt = 0; hba->ufs_stats.last_hibern8_exit_tstamp = ktime_set(0, 0); memset(&hba->ufs_stats.pa_err, 0, err_reg_hist_size); memset(&hba->ufs_stats.dl_err, 0, err_reg_hist_size); memset(&hba->ufs_stats.nl_err, 0, err_reg_hist_size); memset(&hba->ufs_stats.tl_err, 0, err_reg_hist_size); memset(&hba->ufs_stats.dme_err, 0, err_reg_hist_size); hba->req_abort_count = 0; } static void ufshcd_init_desc_sizes(struct ufs_hba *hba) { int err; err = ufshcd_read_desc_length(hba, QUERY_DESC_IDN_DEVICE, 0, &hba->desc_size.dev_desc); if (err) hba->desc_size.dev_desc = QUERY_DESC_DEVICE_DEF_SIZE; err = ufshcd_read_desc_length(hba, QUERY_DESC_IDN_POWER, 0, &hba->desc_size.pwr_desc); if (err) hba->desc_size.pwr_desc = QUERY_DESC_POWER_DEF_SIZE; err = ufshcd_read_desc_length(hba, QUERY_DESC_IDN_INTERCONNECT, 0, &hba->desc_size.interc_desc); if (err) hba->desc_size.interc_desc = QUERY_DESC_INTERCONNECT_DEF_SIZE; err = ufshcd_read_desc_length(hba, QUERY_DESC_IDN_CONFIGURATION, 0, &hba->desc_size.conf_desc); if (err) hba->desc_size.conf_desc = QUERY_DESC_CONFIGURATION_DEF_SIZE; err = ufshcd_read_desc_length(hba, QUERY_DESC_IDN_UNIT, 0, &hba->desc_size.unit_desc); if (err) hba->desc_size.unit_desc = QUERY_DESC_UNIT_DEF_SIZE; err = ufshcd_read_desc_length(hba, QUERY_DESC_IDN_GEOMETRY, 0, &hba->desc_size.geom_desc); if (err) hba->desc_size.geom_desc = QUERY_DESC_GEOMETRY_DEF_SIZE; err = ufshcd_read_desc_length(hba, QUERY_DESC_IDN_HEALTH, 0, &hba->desc_size.hlth_desc); if (err) hba->desc_size.hlth_desc = QUERY_DESC_HEALTH_DEF_SIZE; } static void ufshcd_def_desc_sizes(struct ufs_hba *hba) { hba->desc_size.dev_desc = QUERY_DESC_DEVICE_DEF_SIZE; hba->desc_size.pwr_desc = QUERY_DESC_POWER_DEF_SIZE; hba->desc_size.interc_desc = QUERY_DESC_INTERCONNECT_DEF_SIZE; hba->desc_size.conf_desc = QUERY_DESC_CONFIGURATION_DEF_SIZE; hba->desc_size.unit_desc = QUERY_DESC_UNIT_DEF_SIZE; hba->desc_size.geom_desc = QUERY_DESC_GEOMETRY_DEF_SIZE; hba->desc_size.hlth_desc = QUERY_DESC_HEALTH_DEF_SIZE; } /** * ufshcd_probe_hba - probe hba to detect device and initialize * @hba: per-adapter instance * * Execute link-startup and verify device initialization */ static int ufshcd_probe_hba(struct ufs_hba *hba) { struct ufs_dev_desc card = {0}; int ret; ktime_t start = ktime_get(); ret = ufshcd_link_startup(hba); if (ret) goto out; /* set the default level for urgent bkops */ hba->urgent_bkops_lvl = BKOPS_STATUS_PERF_IMPACT; hba->is_urgent_bkops_lvl_checked = false; /* Debug counters initialization */ ufshcd_clear_dbg_ufs_stats(hba); /* UniPro link is active now */ ufshcd_set_link_active(hba); /* Enable Auto-Hibernate if configured */ ufshcd_auto_hibern8_enable(hba); ret = ufshcd_verify_dev_init(hba); if (ret) goto out; ret = ufshcd_complete_dev_init(hba); if (ret) goto out; /* Init check for device descriptor sizes */ ufshcd_init_desc_sizes(hba); ret = ufs_get_device_desc(hba, &card); if (ret) { dev_err(hba->dev, "%s: Failed getting device info. err = %d\n", __func__, ret); goto out; } ufs_fixup_device_setup(hba, &card); ufshcd_tune_unipro_params(hba); ret = ufshcd_set_vccq_rail_unused(hba, (hba->dev_quirks & UFS_DEVICE_NO_VCCQ) ? true : false); if (ret) goto out; /* UFS device is also active now */ ufshcd_set_ufs_dev_active(hba); ufshcd_force_reset_auto_bkops(hba); hba->wlun_dev_clr_ua = true; if (ufshcd_get_max_pwr_mode(hba)) { dev_err(hba->dev, "%s: Failed getting max supported power mode\n", __func__); } else { ret = ufshcd_config_pwr_mode(hba, &hba->max_pwr_info.info); if (ret) { dev_err(hba->dev, "%s: Failed setting power mode, err = %d\n", __func__, ret); goto out; } } /* set the state as operational after switching to desired gear */ hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL; /* * If we are in error handling context or in power management callbacks * context, no need to scan the host */ if (!ufshcd_eh_in_progress(hba) && !hba->pm_op_in_progress) { bool flag; /* clear any previous UFS device information */ memset(&hba->dev_info, 0, sizeof(hba->dev_info)); if (!ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_READ_FLAG, QUERY_FLAG_IDN_PWR_ON_WPE, &flag)) hba->dev_info.f_power_on_wp_en = flag; if (!hba->is_init_prefetch) ufshcd_init_icc_levels(hba); /* Add required well known logical units to scsi mid layer */ if (ufshcd_scsi_add_wlus(hba)) goto out; /* Initialize devfreq after UFS device is detected */ if (ufshcd_is_clkscaling_supported(hba)) { memcpy(&hba->clk_scaling.saved_pwr_info.info, &hba->pwr_info, sizeof(struct ufs_pa_layer_attr)); hba->clk_scaling.saved_pwr_info.is_valid = true; if (!hba->devfreq) { ret = ufshcd_devfreq_init(hba); if (ret) goto out; } hba->clk_scaling.is_allowed = true; } ufs_bsg_probe(hba); scsi_scan_host(hba->host); pm_runtime_put_sync(hba->dev); } if (!hba->is_init_prefetch) hba->is_init_prefetch = true; out: /* * If we failed to initialize the device or the device is not * present, turn off the power/clocks etc. */ if (ret && !ufshcd_eh_in_progress(hba) && !hba->pm_op_in_progress) { pm_runtime_put_sync(hba->dev); ufshcd_exit_clk_scaling(hba); ufshcd_hba_exit(hba); } trace_ufshcd_init(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); return ret; } /** * ufshcd_async_scan - asynchronous execution for probing hba * @data: data pointer to pass to this function * @cookie: cookie data */ static void ufshcd_async_scan(void *data, async_cookie_t cookie) { struct ufs_hba *hba = (struct ufs_hba *)data; ufshcd_probe_hba(hba); } static enum blk_eh_timer_return ufshcd_eh_timed_out(struct scsi_cmnd *scmd) { unsigned long flags; struct Scsi_Host *host; struct ufs_hba *hba; int index; bool found = false; if (!scmd || !scmd->device || !scmd->device->host) return BLK_EH_DONE; host = scmd->device->host; hba = shost_priv(host); if (!hba) return BLK_EH_DONE; spin_lock_irqsave(host->host_lock, flags); for_each_set_bit(index, &hba->outstanding_reqs, hba->nutrs) { if (hba->lrb[index].cmd == scmd) { found = true; break; } } spin_unlock_irqrestore(host->host_lock, flags); /* * Bypass SCSI error handling and reset the block layer timer if this * SCSI command was not actually dispatched to UFS driver, otherwise * let SCSI layer handle the error as usual. */ return found ? BLK_EH_DONE : BLK_EH_RESET_TIMER; } static const struct attribute_group *ufshcd_driver_groups[] = { &ufs_sysfs_unit_descriptor_group, &ufs_sysfs_lun_attributes_group, NULL, }; static struct scsi_host_template ufshcd_driver_template = { .module = THIS_MODULE, .name = UFSHCD, .proc_name = UFSHCD, .queuecommand = ufshcd_queuecommand, .slave_alloc = ufshcd_slave_alloc, .slave_configure = ufshcd_slave_configure, .slave_destroy = ufshcd_slave_destroy, .change_queue_depth = ufshcd_change_queue_depth, .eh_abort_handler = ufshcd_abort, .eh_device_reset_handler = ufshcd_eh_device_reset_handler, .eh_host_reset_handler = ufshcd_eh_host_reset_handler, .eh_timed_out = ufshcd_eh_timed_out, .this_id = -1, .sg_tablesize = SG_ALL, .cmd_per_lun = UFSHCD_CMD_PER_LUN, .can_queue = UFSHCD_CAN_QUEUE, .max_host_blocked = 1, .track_queue_depth = 1, .sdev_groups = ufshcd_driver_groups, }; static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg, int ua) { int ret; if (!vreg) return 0; ret = regulator_set_load(vreg->reg, ua); if (ret < 0) { dev_err(dev, "%s: %s set load (ua=%d) failed, err=%d\n", __func__, vreg->name, ua, ret); } return ret; } static inline int ufshcd_config_vreg_lpm(struct ufs_hba *hba, struct ufs_vreg *vreg) { if (!vreg) return 0; else if (vreg->unused) return 0; else return ufshcd_config_vreg_load(hba->dev, vreg, UFS_VREG_LPM_LOAD_UA); } static inline int ufshcd_config_vreg_hpm(struct ufs_hba *hba, struct ufs_vreg *vreg) { if (!vreg) return 0; else if (vreg->unused) return 0; else return ufshcd_config_vreg_load(hba->dev, vreg, vreg->max_uA); } static int ufshcd_config_vreg(struct device *dev, struct ufs_vreg *vreg, bool on) { int ret = 0; struct regulator *reg; const char *name; int min_uV, uA_load; BUG_ON(!vreg); reg = vreg->reg; name = vreg->name; if (regulator_count_voltages(reg) > 0) { min_uV = on ? vreg->min_uV : 0; ret = regulator_set_voltage(reg, min_uV, vreg->max_uV); if (ret) { dev_err(dev, "%s: %s set voltage failed, err=%d\n", __func__, name, ret); goto out; } uA_load = on ? vreg->max_uA : 0; ret = ufshcd_config_vreg_load(dev, vreg, uA_load); if (ret) goto out; } out: return ret; } static int ufshcd_enable_vreg(struct device *dev, struct ufs_vreg *vreg) { int ret = 0; if (!vreg) goto out; else if (vreg->enabled || vreg->unused) goto out; ret = ufshcd_config_vreg(dev, vreg, true); if (!ret) ret = regulator_enable(vreg->reg); if (!ret) vreg->enabled = true; else dev_err(dev, "%s: %s enable failed, err=%d\n", __func__, vreg->name, ret); out: return ret; } static int ufshcd_disable_vreg(struct device *dev, struct ufs_vreg *vreg) { int ret = 0; if (!vreg) goto out; else if (!vreg->enabled || vreg->unused) goto out; ret = regulator_disable(vreg->reg); if (!ret) { /* ignore errors on applying disable config */ ufshcd_config_vreg(dev, vreg, false); vreg->enabled = false; } else { dev_err(dev, "%s: %s disable failed, err=%d\n", __func__, vreg->name, ret); } out: return ret; } static int ufshcd_setup_vreg(struct ufs_hba *hba, bool on) { int ret = 0; struct device *dev = hba->dev; struct ufs_vreg_info *info = &hba->vreg_info; if (!info) goto out; ret = ufshcd_toggle_vreg(dev, info->vcc, on); if (ret) goto out; ret = ufshcd_toggle_vreg(dev, info->vccq, on); if (ret) goto out; ret = ufshcd_toggle_vreg(dev, info->vccq2, on); if (ret) goto out; out: if (ret) { ufshcd_toggle_vreg(dev, info->vccq2, false); ufshcd_toggle_vreg(dev, info->vccq, false); ufshcd_toggle_vreg(dev, info->vcc, false); } return ret; } static int ufshcd_setup_hba_vreg(struct ufs_hba *hba, bool on) { struct ufs_vreg_info *info = &hba->vreg_info; if (info) return ufshcd_toggle_vreg(hba->dev, info->vdd_hba, on); return 0; } static int ufshcd_get_vreg(struct device *dev, struct ufs_vreg *vreg) { int ret = 0; if (!vreg) goto out; vreg->reg = devm_regulator_get(dev, vreg->name); if (IS_ERR(vreg->reg)) { ret = PTR_ERR(vreg->reg); dev_err(dev, "%s: %s get failed, err=%d\n", __func__, vreg->name, ret); } out: return ret; } static int ufshcd_init_vreg(struct ufs_hba *hba) { int ret = 0; struct device *dev = hba->dev; struct ufs_vreg_info *info = &hba->vreg_info; if (!info) goto out; ret = ufshcd_get_vreg(dev, info->vcc); if (ret) goto out; ret = ufshcd_get_vreg(dev, info->vccq); if (ret) goto out; ret = ufshcd_get_vreg(dev, info->vccq2); out: return ret; } static int ufshcd_init_hba_vreg(struct ufs_hba *hba) { struct ufs_vreg_info *info = &hba->vreg_info; if (info) return ufshcd_get_vreg(hba->dev, info->vdd_hba); return 0; } static int ufshcd_set_vccq_rail_unused(struct ufs_hba *hba, bool unused) { int ret = 0; struct ufs_vreg_info *info = &hba->vreg_info; if (!info) goto out; else if (!info->vccq) goto out; if (unused) { /* shut off the rail here */ ret = ufshcd_toggle_vreg(hba->dev, info->vccq, false); /* * Mark this rail as no longer used, so it doesn't get enabled * later by mistake */ if (!ret) info->vccq->unused = true; } else { /* * rail should have been already enabled hence just make sure * that unused flag is cleared. */ info->vccq->unused = false; } out: return ret; } static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on, bool skip_ref_clk) { int ret = 0; struct ufs_clk_info *clki; struct list_head *head = &hba->clk_list_head; unsigned long flags; ktime_t start = ktime_get(); bool clk_state_changed = false; if (list_empty(head)) goto out; /* * vendor specific setup_clocks ops may depend on clocks managed by * this standard driver hence call the vendor specific setup_clocks * before disabling the clocks managed here. */ if (!on) { ret = ufshcd_vops_setup_clocks(hba, on, PRE_CHANGE); if (ret) return ret; } list_for_each_entry(clki, head, list) { if (!IS_ERR_OR_NULL(clki->clk)) { if (skip_ref_clk && !strcmp(clki->name, "ref_clk")) continue; clk_state_changed = on ^ clki->enabled; if (on && !clki->enabled) { ret = clk_prepare_enable(clki->clk); if (ret) { dev_err(hba->dev, "%s: %s prepare enable failed, %d\n", __func__, clki->name, ret); goto out; } } else if (!on && clki->enabled) { clk_disable_unprepare(clki->clk); } clki->enabled = on; dev_dbg(hba->dev, "%s: clk: %s %sabled\n", __func__, clki->name, on ? "en" : "dis"); } } /* * vendor specific setup_clocks ops may depend on clocks managed by * this standard driver hence call the vendor specific setup_clocks * after enabling the clocks managed here. */ if (on) { ret = ufshcd_vops_setup_clocks(hba, on, POST_CHANGE); if (ret) return ret; } out: if (ret) { list_for_each_entry(clki, head, list) { if (!IS_ERR_OR_NULL(clki->clk) && clki->enabled) clk_disable_unprepare(clki->clk); } } else if (!ret && on) { spin_lock_irqsave(hba->host->host_lock, flags); hba->clk_gating.state = CLKS_ON; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); spin_unlock_irqrestore(hba->host->host_lock, flags); } if (clk_state_changed) trace_ufshcd_profile_clk_gating(dev_name(hba->dev), (on ? "on" : "off"), ktime_to_us(ktime_sub(ktime_get(), start)), ret); return ret; } static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on) { return __ufshcd_setup_clocks(hba, on, false); } static int ufshcd_init_clocks(struct ufs_hba *hba) { int ret = 0; struct ufs_clk_info *clki; struct device *dev = hba->dev; struct list_head *head = &hba->clk_list_head; if (list_empty(head)) goto out; list_for_each_entry(clki, head, list) { if (!clki->name) continue; clki->clk = devm_clk_get(dev, clki->name); if (IS_ERR(clki->clk)) { ret = PTR_ERR(clki->clk); dev_err(dev, "%s: %s clk get failed, %d\n", __func__, clki->name, ret); goto out; } if (clki->max_freq) { ret = clk_set_rate(clki->clk, clki->max_freq); if (ret) { dev_err(hba->dev, "%s: %s clk set rate(%dHz) failed, %d\n", __func__, clki->name, clki->max_freq, ret); goto out; } clki->curr_freq = clki->max_freq; } dev_dbg(dev, "%s: clk: %s, rate: %lu\n", __func__, clki->name, clk_get_rate(clki->clk)); } out: return ret; } static int ufshcd_variant_hba_init(struct ufs_hba *hba) { int err = 0; if (!hba->vops) goto out; err = ufshcd_vops_init(hba); if (err) goto out; err = ufshcd_vops_setup_regulators(hba, true); if (err) goto out_exit; goto out; out_exit: ufshcd_vops_exit(hba); out: if (err) dev_err(hba->dev, "%s: variant %s init failed err %d\n", __func__, ufshcd_get_var_name(hba), err); return err; } static void ufshcd_variant_hba_exit(struct ufs_hba *hba) { if (!hba->vops) return; ufshcd_vops_setup_regulators(hba, false); ufshcd_vops_exit(hba); } static int ufshcd_hba_init(struct ufs_hba *hba) { int err; /* * Handle host controller power separately from the UFS device power * rails as it will help controlling the UFS host controller power * collapse easily which is different than UFS device power collapse. * Also, enable the host controller power before we go ahead with rest * of the initialization here. */ err = ufshcd_init_hba_vreg(hba); if (err) goto out; err = ufshcd_setup_hba_vreg(hba, true); if (err) goto out; err = ufshcd_init_clocks(hba); if (err) goto out_disable_hba_vreg; err = ufshcd_setup_clocks(hba, true); if (err) goto out_disable_hba_vreg; err = ufshcd_init_vreg(hba); if (err) goto out_disable_clks; err = ufshcd_setup_vreg(hba, true); if (err) goto out_disable_clks; err = ufshcd_variant_hba_init(hba); if (err) goto out_disable_vreg; hba->is_powered = true; goto out; out_disable_vreg: ufshcd_setup_vreg(hba, false); out_disable_clks: ufshcd_setup_clocks(hba, false); out_disable_hba_vreg: ufshcd_setup_hba_vreg(hba, false); out: return err; } static void ufshcd_hba_exit(struct ufs_hba *hba) { if (hba->is_powered) { ufshcd_variant_hba_exit(hba); ufshcd_setup_vreg(hba, false); ufshcd_suspend_clkscaling(hba); if (ufshcd_is_clkscaling_supported(hba)) if (hba->devfreq) ufshcd_suspend_clkscaling(hba); ufshcd_setup_clocks(hba, false); ufshcd_setup_hba_vreg(hba, false); hba->is_powered = false; } } static int ufshcd_send_request_sense(struct ufs_hba *hba, struct scsi_device *sdp) { unsigned char cmd[6] = {REQUEST_SENSE, 0, 0, 0, UFSHCD_REQ_SENSE_SIZE, 0}; char *buffer; int ret; buffer = kzalloc(UFSHCD_REQ_SENSE_SIZE, GFP_KERNEL); if (!buffer) { ret = -ENOMEM; goto out; } ret = scsi_execute(sdp, cmd, DMA_FROM_DEVICE, buffer, UFSHCD_REQ_SENSE_SIZE, NULL, NULL, msecs_to_jiffies(1000), 3, 0, RQF_PM, NULL); if (ret) pr_err("%s: failed with err %d\n", __func__, ret); kfree(buffer); out: return ret; } /** * ufshcd_set_dev_pwr_mode - sends START STOP UNIT command to set device * power mode * @hba: per adapter instance * @pwr_mode: device power mode to set * * Returns 0 if requested power mode is set successfully * Returns non-zero if failed to set the requested power mode */ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba, enum ufs_dev_pwr_mode pwr_mode) { unsigned char cmd[6] = { START_STOP }; struct scsi_sense_hdr sshdr; struct scsi_device *sdp; unsigned long flags; int ret; spin_lock_irqsave(hba->host->host_lock, flags); sdp = hba->sdev_ufs_device; if (sdp) { ret = scsi_device_get(sdp); if (!ret && !scsi_device_online(sdp)) { ret = -ENODEV; scsi_device_put(sdp); } } else { ret = -ENODEV; } spin_unlock_irqrestore(hba->host->host_lock, flags); if (ret) return ret; /* * If scsi commands fail, the scsi mid-layer schedules scsi error- * handling, which would wait for host to be resumed. Since we know * we are functional while we are here, skip host resume in error * handling context. */ hba->host->eh_noresume = 1; if (hba->wlun_dev_clr_ua) { ret = ufshcd_send_request_sense(hba, sdp); if (ret) goto out; /* Unit attention condition is cleared now */ hba->wlun_dev_clr_ua = false; } cmd[4] = pwr_mode << 4; /* * Current function would be generally called from the power management * callbacks hence set the RQF_PM flag so that it doesn't resume the * already suspended childs. */ ret = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr, START_STOP_TIMEOUT, 0, 0, RQF_PM, NULL); if (ret) { sdev_printk(KERN_WARNING, sdp, "START_STOP failed for power mode: %d, result %x\n", pwr_mode, ret); if (driver_byte(ret) == DRIVER_SENSE) scsi_print_sense_hdr(sdp, NULL, &sshdr); } if (!ret) hba->curr_dev_pwr_mode = pwr_mode; out: scsi_device_put(sdp); hba->host->eh_noresume = 0; return ret; } static int ufshcd_link_state_transition(struct ufs_hba *hba, enum uic_link_state req_link_state, int check_for_bkops) { int ret = 0; if (req_link_state == hba->uic_link_state) return 0; if (req_link_state == UIC_LINK_HIBERN8_STATE) { ret = ufshcd_uic_hibern8_enter(hba); if (!ret) ufshcd_set_link_hibern8(hba); else goto out; } /* * If autobkops is enabled, link can't be turned off because * turning off the link would also turn off the device. */ else if ((req_link_state == UIC_LINK_OFF_STATE) && (!check_for_bkops || (check_for_bkops && !hba->auto_bkops_enabled))) { /* * Let's make sure that link is in low power mode, we are doing * this currently by putting the link in Hibern8. Otherway to * put the link in low power mode is to send the DME end point * to device and then send the DME reset command to local * unipro. But putting the link in hibern8 is much faster. */ ret = ufshcd_uic_hibern8_enter(hba); if (ret) goto out; /* * Change controller state to "reset state" which * should also put the link in off/reset state */ ufshcd_hba_stop(hba, true); /* * TODO: Check if we need any delay to make sure that * controller is reset */ ufshcd_set_link_off(hba); } out: return ret; } static void ufshcd_vreg_set_lpm(struct ufs_hba *hba) { /* * It seems some UFS devices may keep drawing more than sleep current * (atleast for 500us) from UFS rails (especially from VCCQ rail). * To avoid this situation, add 2ms delay before putting these UFS * rails in LPM mode. */ if (!ufshcd_is_link_active(hba) && hba->dev_quirks & UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM) usleep_range(2000, 2100); /* * If UFS device is either in UFS_Sleep turn off VCC rail to save some * power. * * If UFS device and link is in OFF state, all power supplies (VCC, * VCCQ, VCCQ2) can be turned off if power on write protect is not * required. If UFS link is inactive (Hibern8 or OFF state) and device * is in sleep state, put VCCQ & VCCQ2 rails in LPM mode. * * Ignore the error returned by ufshcd_toggle_vreg() as device is anyway * in low power state which would save some power. */ if (ufshcd_is_ufs_dev_poweroff(hba) && ufshcd_is_link_off(hba) && !hba->dev_info.is_lu_power_on_wp) { ufshcd_setup_vreg(hba, false); } else if (!ufshcd_is_ufs_dev_active(hba)) { ufshcd_toggle_vreg(hba->dev, hba->vreg_info.vcc, false); if (!ufshcd_is_link_active(hba)) { ufshcd_config_vreg_lpm(hba, hba->vreg_info.vccq); ufshcd_config_vreg_lpm(hba, hba->vreg_info.vccq2); } } } static int ufshcd_vreg_set_hpm(struct ufs_hba *hba) { int ret = 0; if (ufshcd_is_ufs_dev_poweroff(hba) && ufshcd_is_link_off(hba) && !hba->dev_info.is_lu_power_on_wp) { ret = ufshcd_setup_vreg(hba, true); } else if (!ufshcd_is_ufs_dev_active(hba)) { if (!ret && !ufshcd_is_link_active(hba)) { ret = ufshcd_config_vreg_hpm(hba, hba->vreg_info.vccq); if (ret) goto vcc_disable; ret = ufshcd_config_vreg_hpm(hba, hba->vreg_info.vccq2); if (ret) goto vccq_lpm; } ret = ufshcd_toggle_vreg(hba->dev, hba->vreg_info.vcc, true); } goto out; vccq_lpm: ufshcd_config_vreg_lpm(hba, hba->vreg_info.vccq); vcc_disable: ufshcd_toggle_vreg(hba->dev, hba->vreg_info.vcc, false); out: return ret; } static void ufshcd_hba_vreg_set_lpm(struct ufs_hba *hba) { if (ufshcd_is_link_off(hba)) ufshcd_setup_hba_vreg(hba, false); } static void ufshcd_hba_vreg_set_hpm(struct ufs_hba *hba) { if (ufshcd_is_link_off(hba)) ufshcd_setup_hba_vreg(hba, true); } /** * ufshcd_suspend - helper function for suspend operations * @hba: per adapter instance * @pm_op: desired low power operation type * * This function will try to put the UFS device and link into low power * mode based on the "rpm_lvl" (Runtime PM level) or "spm_lvl" * (System PM level). * * If this function is called during shutdown, it will make sure that * both UFS device and UFS link is powered off. * * NOTE: UFS device & link must be active before we enter in this function. * * Returns 0 for success and non-zero for failure */ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) { int ret = 0; enum ufs_pm_level pm_lvl; enum ufs_dev_pwr_mode req_dev_pwr_mode; enum uic_link_state req_link_state; hba->pm_op_in_progress = 1; if (!ufshcd_is_shutdown_pm(pm_op)) { pm_lvl = ufshcd_is_runtime_pm(pm_op) ? hba->rpm_lvl : hba->spm_lvl; req_dev_pwr_mode = ufs_get_pm_lvl_to_dev_pwr_mode(pm_lvl); req_link_state = ufs_get_pm_lvl_to_link_pwr_state(pm_lvl); } else { req_dev_pwr_mode = UFS_POWERDOWN_PWR_MODE; req_link_state = UIC_LINK_OFF_STATE; } /* * If we can't transition into any of the low power modes * just gate the clocks. */ ufshcd_hold(hba, false); hba->clk_gating.is_suspended = true; if (hba->clk_scaling.is_allowed) { cancel_work_sync(&hba->clk_scaling.suspend_work); cancel_work_sync(&hba->clk_scaling.resume_work); ufshcd_suspend_clkscaling(hba); } if (req_dev_pwr_mode == UFS_ACTIVE_PWR_MODE && req_link_state == UIC_LINK_ACTIVE_STATE) { goto disable_clks; } if ((req_dev_pwr_mode == hba->curr_dev_pwr_mode) && (req_link_state == hba->uic_link_state)) goto enable_gating; /* UFS device & link must be active before we enter in this function */ if (!ufshcd_is_ufs_dev_active(hba) || !ufshcd_is_link_active(hba)) { ret = -EINVAL; goto enable_gating; } if (ufshcd_is_runtime_pm(pm_op)) { if (ufshcd_can_autobkops_during_suspend(hba)) { /* * The device is idle with no requests in the queue, * allow background operations if bkops status shows * that performance might be impacted. */ ret = ufshcd_urgent_bkops(hba); if (ret) goto enable_gating; } else { /* make sure that auto bkops is disabled */ ufshcd_disable_auto_bkops(hba); } } if ((req_dev_pwr_mode != hba->curr_dev_pwr_mode) && ((ufshcd_is_runtime_pm(pm_op) && !hba->auto_bkops_enabled) || !ufshcd_is_runtime_pm(pm_op))) { /* ensure that bkops is disabled */ ufshcd_disable_auto_bkops(hba); ret = ufshcd_set_dev_pwr_mode(hba, req_dev_pwr_mode); if (ret) goto enable_gating; } ret = ufshcd_link_state_transition(hba, req_link_state, 1); if (ret) goto set_dev_active; ufshcd_vreg_set_lpm(hba); disable_clks: /* * Call vendor specific suspend callback. As these callbacks may access * vendor specific host controller register space call them before the * host clocks are ON. */ ret = ufshcd_vops_suspend(hba, pm_op); if (ret) goto set_link_active; if (!ufshcd_is_link_active(hba)) ufshcd_setup_clocks(hba, false); else /* If link is active, device ref_clk can't be switched off */ __ufshcd_setup_clocks(hba, false, true); hba->clk_gating.state = CLKS_OFF; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); /* * Disable the host irq as host controller as there won't be any * host controller transaction expected till resume. */ ufshcd_disable_irq(hba); /* Put the host controller in low power mode if possible */ ufshcd_hba_vreg_set_lpm(hba); goto out; set_link_active: if (hba->clk_scaling.is_allowed) ufshcd_resume_clkscaling(hba); ufshcd_vreg_set_hpm(hba); if (ufshcd_is_link_hibern8(hba) && !ufshcd_uic_hibern8_exit(hba)) ufshcd_set_link_active(hba); else if (ufshcd_is_link_off(hba)) ufshcd_host_reset_and_restore(hba); set_dev_active: if (!ufshcd_set_dev_pwr_mode(hba, UFS_ACTIVE_PWR_MODE)) ufshcd_disable_auto_bkops(hba); enable_gating: if (hba->clk_scaling.is_allowed) ufshcd_resume_clkscaling(hba); hba->clk_gating.is_suspended = false; ufshcd_release(hba); out: hba->pm_op_in_progress = 0; return ret; } /** * ufshcd_resume - helper function for resume operations * @hba: per adapter instance * @pm_op: runtime PM or system PM * * This function basically brings the UFS device, UniPro link and controller * to active state. * * Returns 0 for success and non-zero for failure */ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) { int ret; enum uic_link_state old_link_state; hba->pm_op_in_progress = 1; old_link_state = hba->uic_link_state; ufshcd_hba_vreg_set_hpm(hba); /* Make sure clocks are enabled before accessing controller */ ret = ufshcd_setup_clocks(hba, true); if (ret) goto out; /* enable the host irq as host controller would be active soon */ ret = ufshcd_enable_irq(hba); if (ret) goto disable_irq_and_vops_clks; ret = ufshcd_vreg_set_hpm(hba); if (ret) goto disable_irq_and_vops_clks; /* * Call vendor specific resume callback. As these callbacks may access * vendor specific host controller register space call them when the * host clocks are ON. */ ret = ufshcd_vops_resume(hba, pm_op); if (ret) goto disable_vreg; if (ufshcd_is_link_hibern8(hba)) { ret = ufshcd_uic_hibern8_exit(hba); if (!ret) ufshcd_set_link_active(hba); else goto vendor_suspend; } else if (ufshcd_is_link_off(hba)) { ret = ufshcd_host_reset_and_restore(hba); /* * ufshcd_host_reset_and_restore() should have already * set the link state as active */ if (ret || !ufshcd_is_link_active(hba)) goto vendor_suspend; } if (!ufshcd_is_ufs_dev_active(hba)) { ret = ufshcd_set_dev_pwr_mode(hba, UFS_ACTIVE_PWR_MODE); if (ret) goto set_old_link_state; } if (ufshcd_keep_autobkops_enabled_except_suspend(hba)) ufshcd_enable_auto_bkops(hba); else /* * If BKOPs operations are urgently needed at this moment then * keep auto-bkops enabled or else disable it. */ ufshcd_urgent_bkops(hba); hba->clk_gating.is_suspended = false; if (hba->clk_scaling.is_allowed) ufshcd_resume_clkscaling(hba); /* Schedule clock gating in case of no access to UFS device yet */ ufshcd_release(hba); /* Enable Auto-Hibernate if configured */ ufshcd_auto_hibern8_enable(hba); goto out; set_old_link_state: ufshcd_link_state_transition(hba, old_link_state, 0); vendor_suspend: ufshcd_vops_suspend(hba, pm_op); disable_vreg: ufshcd_vreg_set_lpm(hba); disable_irq_and_vops_clks: ufshcd_disable_irq(hba); if (hba->clk_scaling.is_allowed) ufshcd_suspend_clkscaling(hba); ufshcd_setup_clocks(hba, false); out: hba->pm_op_in_progress = 0; return ret; } /** * ufshcd_system_suspend - system suspend routine * @hba: per adapter instance * * Check the description of ufshcd_suspend() function for more details. * * Returns 0 for success and non-zero for failure */ int ufshcd_system_suspend(struct ufs_hba *hba) { int ret = 0; ktime_t start = ktime_get(); if (!hba || !hba->is_powered) return 0; if ((ufs_get_pm_lvl_to_dev_pwr_mode(hba->spm_lvl) == hba->curr_dev_pwr_mode) && (ufs_get_pm_lvl_to_link_pwr_state(hba->spm_lvl) == hba->uic_link_state)) goto out; if (pm_runtime_suspended(hba->dev)) { /* * UFS device and/or UFS link low power states during runtime * suspend seems to be different than what is expected during * system suspend. Hence runtime resume the devic & link and * let the system suspend low power states to take effect. * TODO: If resume takes longer time, we might have optimize * it in future by not resuming everything if possible. */ ret = ufshcd_runtime_resume(hba); if (ret) goto out; } ret = ufshcd_suspend(hba, UFS_SYSTEM_PM); out: trace_ufshcd_system_suspend(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); if (!ret) hba->is_sys_suspended = true; return ret; } EXPORT_SYMBOL(ufshcd_system_suspend); /** * ufshcd_system_resume - system resume routine * @hba: per adapter instance * * Returns 0 for success and non-zero for failure */ int ufshcd_system_resume(struct ufs_hba *hba) { int ret = 0; ktime_t start = ktime_get(); if (!hba) return -EINVAL; if (!hba->is_powered || pm_runtime_suspended(hba->dev)) /* * Let the runtime resume take care of resuming * if runtime suspended. */ goto out; else ret = ufshcd_resume(hba, UFS_SYSTEM_PM); out: trace_ufshcd_system_resume(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); return ret; } EXPORT_SYMBOL(ufshcd_system_resume); /** * ufshcd_runtime_suspend - runtime suspend routine * @hba: per adapter instance * * Check the description of ufshcd_suspend() function for more details. * * Returns 0 for success and non-zero for failure */ int ufshcd_runtime_suspend(struct ufs_hba *hba) { int ret = 0; ktime_t start = ktime_get(); if (!hba) return -EINVAL; if (!hba->is_powered) goto out; else ret = ufshcd_suspend(hba, UFS_RUNTIME_PM); out: trace_ufshcd_runtime_suspend(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); return ret; } EXPORT_SYMBOL(ufshcd_runtime_suspend); /** * ufshcd_runtime_resume - runtime resume routine * @hba: per adapter instance * * This function basically brings the UFS device, UniPro link and controller * to active state. Following operations are done in this function: * * 1. Turn on all the controller related clocks * 2. Bring the UniPro link out of Hibernate state * 3. If UFS device is in sleep state, turn ON VCC rail and bring the UFS device * to active state. * 4. If auto-bkops is enabled on the device, disable it. * * So following would be the possible power state after this function return * successfully: * S1: UFS device in Active state with VCC rail ON * UniPro link in Active state * All the UFS/UniPro controller clocks are ON * * Returns 0 for success and non-zero for failure */ int ufshcd_runtime_resume(struct ufs_hba *hba) { int ret = 0; ktime_t start = ktime_get(); if (!hba) return -EINVAL; if (!hba->is_powered) goto out; else ret = ufshcd_resume(hba, UFS_RUNTIME_PM); out: trace_ufshcd_runtime_resume(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); return ret; } EXPORT_SYMBOL(ufshcd_runtime_resume); int ufshcd_runtime_idle(struct ufs_hba *hba) { return 0; } EXPORT_SYMBOL(ufshcd_runtime_idle); /** * ufshcd_shutdown - shutdown routine * @hba: per adapter instance * * This function would power off both UFS device and UFS link. * * Returns 0 always to allow force shutdown even in case of errors. */ int ufshcd_shutdown(struct ufs_hba *hba) { int ret = 0; if (ufshcd_is_ufs_dev_poweroff(hba) && ufshcd_is_link_off(hba)) goto out; if (pm_runtime_suspended(hba->dev)) { ret = ufshcd_runtime_resume(hba); if (ret) goto out; } ret = ufshcd_suspend(hba, UFS_SHUTDOWN_PM); out: if (ret) dev_err(hba->dev, "%s failed, err %d\n", __func__, ret); /* allow force shutdown even in case of errors */ return 0; } EXPORT_SYMBOL(ufshcd_shutdown); /** * ufshcd_remove - de-allocate SCSI host and host memory space * data structure memory * @hba: per adapter instance */ void ufshcd_remove(struct ufs_hba *hba) { ufs_bsg_remove(hba); ufs_sysfs_remove_nodes(hba->dev); scsi_remove_host(hba->host); /* disable interrupts */ ufshcd_disable_intr(hba, hba->intr_mask); ufshcd_hba_stop(hba, true); ufshcd_exit_clk_scaling(hba); ufshcd_exit_clk_gating(hba); if (ufshcd_is_clkscaling_supported(hba)) device_remove_file(hba->dev, &hba->clk_scaling.enable_attr); ufshcd_hba_exit(hba); } EXPORT_SYMBOL_GPL(ufshcd_remove); /** * ufshcd_dealloc_host - deallocate Host Bus Adapter (HBA) * @hba: pointer to Host Bus Adapter (HBA) */ void ufshcd_dealloc_host(struct ufs_hba *hba) { scsi_host_put(hba->host); } EXPORT_SYMBOL_GPL(ufshcd_dealloc_host); /** * ufshcd_set_dma_mask - Set dma mask based on the controller * addressing capability * @hba: per adapter instance * * Returns 0 for success, non-zero for failure */ static int ufshcd_set_dma_mask(struct ufs_hba *hba) { if (hba->capabilities & MASK_64_ADDRESSING_SUPPORT) { if (!dma_set_mask_and_coherent(hba->dev, DMA_BIT_MASK(64))) return 0; } return dma_set_mask_and_coherent(hba->dev, DMA_BIT_MASK(32)); } /** * ufshcd_alloc_host - allocate Host Bus Adapter (HBA) * @dev: pointer to device handle * @hba_handle: driver private handle * Returns 0 on success, non-zero value on failure */ int ufshcd_alloc_host(struct device *dev, struct ufs_hba **hba_handle) { struct Scsi_Host *host; struct ufs_hba *hba; int err = 0; if (!dev) { dev_err(dev, "Invalid memory reference for dev is NULL\n"); err = -ENODEV; goto out_error; } host = scsi_host_alloc(&ufshcd_driver_template, sizeof(struct ufs_hba)); if (!host) { dev_err(dev, "scsi_host_alloc failed\n"); err = -ENOMEM; goto out_error; } hba = shost_priv(host); hba->host = host; hba->dev = dev; *hba_handle = hba; INIT_LIST_HEAD(&hba->clk_list_head); out_error: return err; } EXPORT_SYMBOL(ufshcd_alloc_host); /** * ufshcd_init - Driver initialization routine * @hba: per-adapter instance * @mmio_base: base register address * @irq: Interrupt line of device * Returns 0 on success, non-zero value on failure */ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) { int err; struct Scsi_Host *host = hba->host; struct device *dev = hba->dev; if (!mmio_base) { dev_err(hba->dev, "Invalid memory reference for mmio_base is NULL\n"); err = -ENODEV; goto out_error; } hba->mmio_base = mmio_base; hba->irq = irq; /* Set descriptor lengths to specification defaults */ ufshcd_def_desc_sizes(hba); err = ufshcd_hba_init(hba); if (err) goto out_error; /* Read capabilities registers */ ufshcd_hba_capabilities(hba); /* Get UFS version supported by the controller */ hba->ufs_version = ufshcd_get_ufs_version(hba); if ((hba->ufs_version != UFSHCI_VERSION_10) && (hba->ufs_version != UFSHCI_VERSION_11) && (hba->ufs_version != UFSHCI_VERSION_20) && (hba->ufs_version != UFSHCI_VERSION_21)) dev_err(hba->dev, "invalid UFS version 0x%x\n", hba->ufs_version); /* Get Interrupt bit mask per version */ hba->intr_mask = ufshcd_get_intr_mask(hba); err = ufshcd_set_dma_mask(hba); if (err) { dev_err(hba->dev, "set dma mask failed\n"); goto out_disable; } /* Allocate memory for host memory space */ err = ufshcd_memory_alloc(hba); if (err) { dev_err(hba->dev, "Memory allocation failed\n"); goto out_disable; } /* Configure LRB */ ufshcd_host_memory_configure(hba); host->can_queue = hba->nutrs; host->cmd_per_lun = hba->nutrs; host->max_id = UFSHCD_MAX_ID; host->max_lun = UFS_MAX_LUNS; host->max_channel = UFSHCD_MAX_CHANNEL; host->unique_id = host->host_no; host->max_cmd_len = UFS_CDB_SIZE; hba->max_pwr_info.is_valid = false; /* Initailize wait queue for task management */ init_waitqueue_head(&hba->tm_wq); init_waitqueue_head(&hba->tm_tag_wq); /* Initialize work queues */ INIT_WORK(&hba->eh_work, ufshcd_err_handler); INIT_WORK(&hba->eeh_work, ufshcd_exception_event_handler); /* Initialize UIC command mutex */ mutex_init(&hba->uic_cmd_mutex); /* Initialize mutex for device management commands */ mutex_init(&hba->dev_cmd.lock); init_rwsem(&hba->clk_scaling_lock); /* Initialize device management tag acquire wait queue */ init_waitqueue_head(&hba->dev_cmd.tag_wq); ufshcd_init_clk_gating(hba); ufshcd_init_clk_scaling(hba); /* * In order to avoid any spurious interrupt immediately after * registering UFS controller interrupt handler, clear any pending UFS * interrupt status and disable all the UFS interrupts. */ ufshcd_writel(hba, ufshcd_readl(hba, REG_INTERRUPT_STATUS), REG_INTERRUPT_STATUS); ufshcd_writel(hba, 0, REG_INTERRUPT_ENABLE); /* * Make sure that UFS interrupts are disabled and any pending interrupt * status is cleared before registering UFS interrupt handler. */ mb(); /* IRQ registration */ err = devm_request_irq(dev, irq, ufshcd_intr, IRQF_SHARED, UFSHCD, hba); if (err) { dev_err(hba->dev, "request irq failed\n"); goto exit_gating; } else { hba->is_irq_enabled = true; } err = scsi_add_host(host, hba->dev); if (err) { dev_err(hba->dev, "scsi_add_host failed\n"); goto exit_gating; } /* Host controller enable */ err = ufshcd_hba_enable(hba); if (err) { dev_err(hba->dev, "Host controller enable failed\n"); ufshcd_print_host_regs(hba); ufshcd_print_host_state(hba); goto out_remove_scsi_host; } /* * Set the default power management level for runtime and system PM. * Default power saving mode is to keep UFS link in Hibern8 state * and UFS device in sleep state. */ hba->rpm_lvl = ufs_get_desired_pm_lvl_for_dev_link_state( UFS_SLEEP_PWR_MODE, UIC_LINK_HIBERN8_STATE); hba->spm_lvl = ufs_get_desired_pm_lvl_for_dev_link_state( UFS_SLEEP_PWR_MODE, UIC_LINK_HIBERN8_STATE); /* Set the default auto-hiberate idle timer value to 150 ms */ if (hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT) { hba->ahit = FIELD_PREP(UFSHCI_AHIBERN8_TIMER_MASK, 150) | FIELD_PREP(UFSHCI_AHIBERN8_SCALE_MASK, 3); } /* Hold auto suspend until async scan completes */ pm_runtime_get_sync(dev); atomic_set(&hba->scsi_block_reqs_cnt, 0); /* * We are assuming that device wasn't put in sleep/power-down * state exclusively during the boot stage before kernel. * This assumption helps avoid doing link startup twice during * ufshcd_probe_hba(). */ ufshcd_set_ufs_dev_active(hba); async_schedule(ufshcd_async_scan, hba); ufs_sysfs_add_nodes(hba->dev); return 0; out_remove_scsi_host: scsi_remove_host(hba->host); exit_gating: ufshcd_exit_clk_scaling(hba); ufshcd_exit_clk_gating(hba); out_disable: hba->is_irq_enabled = false; ufshcd_hba_exit(hba); out_error: return err; } EXPORT_SYMBOL_GPL(ufshcd_init); MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>"); MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>"); MODULE_DESCRIPTION("Generic UFS host controller driver Core"); MODULE_LICENSE("GPL"); MODULE_VERSION(UFSHCD_DRIVER_VERSION);
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