| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Wey-Yi Guy | 13623 | 44.87% | 21 | 6.93% |
| Stanislaw Gruszka | 13499 | 44.46% | 89 | 29.37% |
| Johannes Berg | 825 | 2.72% | 53 | 17.49% |
| Tomas Winkler | 646 | 2.13% | 26 | 8.58% |
| Yi Zhu | 578 | 1.90% | 5 | 1.65% |
| Mohamed Abbas | 176 | 0.58% | 7 | 2.31% |
| Daniel C. Halperin | 111 | 0.37% | 2 | 0.66% |
| Reinette Chatre | 110 | 0.36% | 11 | 3.63% |
| Emmanuel Grumbach | 96 | 0.32% | 10 | 3.30% |
| Samuel Ortiz | 92 | 0.30% | 5 | 1.65% |
| Christophe Jaillet | 84 | 0.28% | 1 | 0.33% |
| Jay Sternberg | 73 | 0.24% | 2 | 0.66% |
| Abhijeet Kolekar | 47 | 0.15% | 6 | 1.98% |
| Ron Rindjunsky | 38 | 0.13% | 7 | 2.31% |
| Sara Sharon | 35 | 0.12% | 1 | 0.33% |
| Christian Lamparter | 34 | 0.11% | 1 | 0.33% |
| Joe Perches | 31 | 0.10% | 5 | 1.65% |
| Lee Jones | 25 | 0.08% | 1 | 0.33% |
| Helmut Schaa | 23 | 0.08% | 1 | 0.33% |
| Assaf Krauss | 23 | 0.08% | 4 | 1.32% |
| Kees Cook | 16 | 0.05% | 1 | 0.33% |
| Alexey Dobriyan | 15 | 0.05% | 1 | 0.33% |
| Allen Pais | 13 | 0.04% | 1 | 0.33% |
| Luis R. Rodriguez | 11 | 0.04% | 2 | 0.66% |
| Thomas Huehn | 11 | 0.04% | 1 | 0.33% |
| Andrzej Zaborowski | 11 | 0.04% | 1 | 0.33% |
| Julia Lawall | 10 | 0.03% | 3 | 0.99% |
| Julian Calaby | 10 | 0.03% | 1 | 0.33% |
| Stephen Hemminger | 8 | 0.03% | 1 | 0.33% |
| Stanislaw W. Gruszka | 8 | 0.03% | 1 | 0.33% |
| Benoit Taine | 6 | 0.02% | 1 | 0.33% |
| Eliad Peller | 5 | 0.02% | 1 | 0.33% |
| Alexander Wetzel | 5 | 0.02% | 1 | 0.33% |
| Ester Kummer | 5 | 0.02% | 1 | 0.33% |
| Gustavo A. R. Silva | 5 | 0.02% | 1 | 0.33% |
| Alexey Khoroshilov | 5 | 0.02% | 1 | 0.33% |
| Jia-Ju Bai | 5 | 0.02% | 1 | 0.33% |
| Sergei Shtylyov | 5 | 0.02% | 1 | 0.33% |
| Linus Torvalds (pre-git) | 4 | 0.01% | 2 | 0.66% |
| Phong Tran | 4 | 0.01% | 1 | 0.33% |
| Akinobu Mita | 4 | 0.01% | 1 | 0.33% |
| Christoph Hellwig | 3 | 0.01% | 2 | 0.66% |
| Rick Farrington | 3 | 0.01% | 1 | 0.33% |
| Ben M Cahill | 3 | 0.01% | 2 | 0.66% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.33% |
| Dan Carpenter | 2 | 0.01% | 1 | 0.33% |
| Joonwoo Park | 2 | 0.01% | 1 | 0.33% |
| Jingoo Han | 2 | 0.01% | 1 | 0.33% |
| Flavio Suligoi | 1 | 0.00% | 1 | 0.33% |
| Greg Dietsche | 1 | 0.00% | 1 | 0.33% |
| Arvind Yadav | 1 | 0.00% | 1 | 0.33% |
| Linus Torvalds | 1 | 0.00% | 1 | 0.33% |
| zhong jiang | 1 | 0.00% | 1 | 0.33% |
| Eric Dumazet | 1 | 0.00% | 1 | 0.33% |
| Hans Wennborg | 1 | 0.00% | 1 | 0.33% |
| Jilin Yuan | 1 | 0.00% | 1 | 0.33% |
| Thomas Pedersen | 1 | 0.00% | 1 | 0.33% |
| Colin Ian King | 1 | 0.00% | 1 | 0.33% |
| John W. Linville | 1 | 0.00% | 1 | 0.33% |
| Total | 30363 | 303 |
// SPDX-License-Identifier: GPL-2.0-only /****************************************************************************** * * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. * * Contact Information: * Intel Linux Wireless <ilw@linux.intel.com> * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/dma-mapping.h> #include <linux/delay.h> #include <linux/sched.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/firmware.h> #include <linux/etherdevice.h> #include <linux/if_arp.h> #include <linux/units.h> #include <net/mac80211.h> #include <asm/div64.h> #define DRV_NAME "iwl4965" #include "common.h" #include "4965.h" /****************************************************************************** * * module boiler plate * ******************************************************************************/ /* * module name, copyright, version, etc. */ #define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux" #ifdef CONFIG_IWLEGACY_DEBUG #define VD "d" #else #define VD #endif #define DRV_VERSION IWLWIFI_VERSION VD MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_VERSION(DRV_VERSION); MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); MODULE_LICENSE("GPL"); MODULE_ALIAS("iwl4965"); void il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status) { if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { IL_ERR("Tx flush command to flush out all frames\n"); if (!test_bit(S_EXIT_PENDING, &il->status)) queue_work(il->workqueue, &il->tx_flush); } } /* * EEPROM */ struct il_mod_params il4965_mod_params = { .restart_fw = 1, /* the rest are 0 by default */ }; void il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq) { unsigned long flags; int i; spin_lock_irqsave(&rxq->lock, flags); INIT_LIST_HEAD(&rxq->rx_free); INIT_LIST_HEAD(&rxq->rx_used); /* Fill the rx_used queue with _all_ of the Rx buffers */ for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { /* In the reset function, these buffers may have been allocated * to an SKB, so we need to unmap and free potential storage */ if (rxq->pool[i].page != NULL) { dma_unmap_page(&il->pci_dev->dev, rxq->pool[i].page_dma, PAGE_SIZE << il->hw_params.rx_page_order, DMA_FROM_DEVICE); __il_free_pages(il, rxq->pool[i].page); rxq->pool[i].page = NULL; } list_add_tail(&rxq->pool[i].list, &rxq->rx_used); } for (i = 0; i < RX_QUEUE_SIZE; i++) rxq->queue[i] = NULL; /* Set us so that we have processed and used all buffers, but have * not restocked the Rx queue with fresh buffers */ rxq->read = rxq->write = 0; rxq->write_actual = 0; rxq->free_count = 0; spin_unlock_irqrestore(&rxq->lock, flags); } int il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq) { u32 rb_size; const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ u32 rb_timeout = 0; if (il->cfg->mod_params->amsdu_size_8K) rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; else rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; /* Stop Rx DMA */ il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); /* Reset driver's Rx queue write idx */ il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); /* Tell device where to find RBD circular buffer in DRAM */ il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8)); /* Tell device where in DRAM to update its Rx status */ il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4); /* Enable Rx DMA * Direct rx interrupts to hosts * Rx buffer size 4 or 8k * RB timeout 0x10 * 256 RBDs */ il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | rb_size | (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) | (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); /* Set interrupt coalescing timer to default (2048 usecs) */ il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF); return 0; } static void il4965_set_pwr_vmain(struct il_priv *il) { /* * (for documentation purposes) * to set power to V_AUX, do: if (pci_pme_capable(il->pci_dev, PCI_D3cold)) il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_PWR_SRC_VAUX, ~APMG_PS_CTRL_MSK_PWR_SRC); */ il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, ~APMG_PS_CTRL_MSK_PWR_SRC); } int il4965_hw_nic_init(struct il_priv *il) { unsigned long flags; struct il_rx_queue *rxq = &il->rxq; int ret; spin_lock_irqsave(&il->lock, flags); il_apm_init(il); /* Set interrupt coalescing calibration timer to default (512 usecs) */ il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF); spin_unlock_irqrestore(&il->lock, flags); il4965_set_pwr_vmain(il); il4965_nic_config(il); /* Allocate the RX queue, or reset if it is already allocated */ if (!rxq->bd) { ret = il_rx_queue_alloc(il); if (ret) { IL_ERR("Unable to initialize Rx queue\n"); return -ENOMEM; } } else il4965_rx_queue_reset(il, rxq); il4965_rx_replenish(il); il4965_rx_init(il, rxq); spin_lock_irqsave(&il->lock, flags); rxq->need_update = 1; il_rx_queue_update_write_ptr(il, rxq); spin_unlock_irqrestore(&il->lock, flags); /* Allocate or reset and init all Tx and Command queues */ if (!il->txq) { ret = il4965_txq_ctx_alloc(il); if (ret) return ret; } else il4965_txq_ctx_reset(il); set_bit(S_INIT, &il->status); return 0; } /* * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr */ static inline __le32 il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr) { return cpu_to_le32((u32) (dma_addr >> 8)); } /* * il4965_rx_queue_restock - refill RX queue from pre-allocated pool * * If there are slots in the RX queue that need to be restocked, * and we have free pre-allocated buffers, fill the ranks as much * as we can, pulling from rx_free. * * This moves the 'write' idx forward to catch up with 'processed', and * also updates the memory address in the firmware to reference the new * target buffer. */ void il4965_rx_queue_restock(struct il_priv *il) { struct il_rx_queue *rxq = &il->rxq; struct list_head *element; struct il_rx_buf *rxb; unsigned long flags; spin_lock_irqsave(&rxq->lock, flags); while (il_rx_queue_space(rxq) > 0 && rxq->free_count) { /* The overwritten rxb must be a used one */ rxb = rxq->queue[rxq->write]; BUG_ON(rxb && rxb->page); /* Get next free Rx buffer, remove from free list */ element = rxq->rx_free.next; rxb = list_entry(element, struct il_rx_buf, list); list_del(element); /* Point to Rx buffer via next RBD in circular buffer */ rxq->bd[rxq->write] = il4965_dma_addr2rbd_ptr(il, rxb->page_dma); rxq->queue[rxq->write] = rxb; rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; rxq->free_count--; } spin_unlock_irqrestore(&rxq->lock, flags); /* If the pre-allocated buffer pool is dropping low, schedule to * refill it */ if (rxq->free_count <= RX_LOW_WATERMARK) queue_work(il->workqueue, &il->rx_replenish); /* If we've added more space for the firmware to place data, tell it. * Increment device's write pointer in multiples of 8. */ if (rxq->write_actual != (rxq->write & ~0x7)) { spin_lock_irqsave(&rxq->lock, flags); rxq->need_update = 1; spin_unlock_irqrestore(&rxq->lock, flags); il_rx_queue_update_write_ptr(il, rxq); } } /* * il4965_rx_replenish - Move all used packet from rx_used to rx_free * * When moving to rx_free an SKB is allocated for the slot. * * Also restock the Rx queue via il_rx_queue_restock. * This is called as a scheduled work item (except for during initialization) */ static void il4965_rx_allocate(struct il_priv *il, gfp_t priority) { struct il_rx_queue *rxq = &il->rxq; struct list_head *element; struct il_rx_buf *rxb; struct page *page; dma_addr_t page_dma; unsigned long flags; gfp_t gfp_mask = priority; while (1) { spin_lock_irqsave(&rxq->lock, flags); if (list_empty(&rxq->rx_used)) { spin_unlock_irqrestore(&rxq->lock, flags); return; } spin_unlock_irqrestore(&rxq->lock, flags); if (rxq->free_count > RX_LOW_WATERMARK) gfp_mask |= __GFP_NOWARN; if (il->hw_params.rx_page_order > 0) gfp_mask |= __GFP_COMP; /* Alloc a new receive buffer */ page = alloc_pages(gfp_mask, il->hw_params.rx_page_order); if (!page) { if (net_ratelimit()) D_INFO("alloc_pages failed, " "order: %d\n", il->hw_params.rx_page_order); if (rxq->free_count <= RX_LOW_WATERMARK && net_ratelimit()) IL_ERR("Failed to alloc_pages with %s. " "Only %u free buffers remaining.\n", priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL", rxq->free_count); /* We don't reschedule replenish work here -- we will * call the restock method and if it still needs * more buffers it will schedule replenish */ return; } /* Get physical address of the RB */ page_dma = dma_map_page(&il->pci_dev->dev, page, 0, PAGE_SIZE << il->hw_params.rx_page_order, DMA_FROM_DEVICE); if (unlikely(dma_mapping_error(&il->pci_dev->dev, page_dma))) { __free_pages(page, il->hw_params.rx_page_order); break; } spin_lock_irqsave(&rxq->lock, flags); if (list_empty(&rxq->rx_used)) { spin_unlock_irqrestore(&rxq->lock, flags); dma_unmap_page(&il->pci_dev->dev, page_dma, PAGE_SIZE << il->hw_params.rx_page_order, DMA_FROM_DEVICE); __free_pages(page, il->hw_params.rx_page_order); return; } element = rxq->rx_used.next; rxb = list_entry(element, struct il_rx_buf, list); list_del(element); BUG_ON(rxb->page); rxb->page = page; rxb->page_dma = page_dma; list_add_tail(&rxb->list, &rxq->rx_free); rxq->free_count++; il->alloc_rxb_page++; spin_unlock_irqrestore(&rxq->lock, flags); } } void il4965_rx_replenish(struct il_priv *il) { unsigned long flags; il4965_rx_allocate(il, GFP_KERNEL); spin_lock_irqsave(&il->lock, flags); il4965_rx_queue_restock(il); spin_unlock_irqrestore(&il->lock, flags); } void il4965_rx_replenish_now(struct il_priv *il) { il4965_rx_allocate(il, GFP_ATOMIC); il4965_rx_queue_restock(il); } /* Assumes that the skb field of the buffers in 'pool' is kept accurate. * If an SKB has been detached, the POOL needs to have its SKB set to NULL * This free routine walks the list of POOL entries and if SKB is set to * non NULL it is unmapped and freed */ void il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq) { int i; for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { if (rxq->pool[i].page != NULL) { dma_unmap_page(&il->pci_dev->dev, rxq->pool[i].page_dma, PAGE_SIZE << il->hw_params.rx_page_order, DMA_FROM_DEVICE); __il_free_pages(il, rxq->pool[i].page); rxq->pool[i].page = NULL; } } dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, rxq->bd_dma); dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status), rxq->rb_stts, rxq->rb_stts_dma); rxq->bd = NULL; rxq->rb_stts = NULL; } int il4965_rxq_stop(struct il_priv *il) { int ret; _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG, FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000); if (ret < 0) IL_ERR("Can't stop Rx DMA.\n"); return 0; } int il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band) { int idx = 0; int band_offset = 0; /* HT rate format: mac80211 wants an MCS number, which is just LSB */ if (rate_n_flags & RATE_MCS_HT_MSK) { idx = (rate_n_flags & 0xff); return idx; /* Legacy rate format, search for match in table */ } else { if (band == NL80211_BAND_5GHZ) band_offset = IL_FIRST_OFDM_RATE; for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++) if (il_rates[idx].plcp == (rate_n_flags & 0xFF)) return idx - band_offset; } return -1; } static int il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp) { /* data from PHY/DSP regarding signal strength, etc., * contents are always there, not configurable by host. */ struct il4965_rx_non_cfg_phy *ncphy = (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf; u32 agc = (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >> IL49_AGC_DB_POS; u32 valid_antennae = (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK) >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET; u8 max_rssi = 0; u32 i; /* Find max rssi among 3 possible receivers. * These values are measured by the digital signal processor (DSP). * They should stay fairly constant even as the signal strength varies, * if the radio's automatic gain control (AGC) is working right. * AGC value (see below) will provide the "interesting" info. */ for (i = 0; i < 3; i++) if (valid_antennae & (1 << i)) max_rssi = max(ncphy->rssi_info[i << 1], max_rssi); D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n", ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4], max_rssi, agc); /* dBm = max_rssi dB - agc dB - constant. * Higher AGC (higher radio gain) means lower signal. */ return max_rssi - agc - IL4965_RSSI_OFFSET; } static u32 il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in) { u32 decrypt_out = 0; if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == RX_RES_STATUS_STATION_FOUND) decrypt_out |= (RX_RES_STATUS_STATION_FOUND | RX_RES_STATUS_NO_STATION_INFO_MISMATCH); decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); /* packet was not encrypted */ if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == RX_RES_STATUS_SEC_TYPE_NONE) return decrypt_out; /* packet was encrypted with unknown alg */ if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == RX_RES_STATUS_SEC_TYPE_ERR) return decrypt_out; /* decryption was not done in HW */ if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != RX_MPDU_RES_STATUS_DEC_DONE_MSK) return decrypt_out; switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { case RX_RES_STATUS_SEC_TYPE_CCMP: /* alg is CCM: check MIC only */ if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) /* Bad MIC */ decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; else decrypt_out |= RX_RES_STATUS_DECRYPT_OK; break; case RX_RES_STATUS_SEC_TYPE_TKIP: if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { /* Bad TTAK */ decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; break; } fallthrough; /* if TTAK OK */ default: if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; else decrypt_out |= RX_RES_STATUS_DECRYPT_OK; break; } D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out); return decrypt_out; } #define SMALL_PACKET_SIZE 256 static void il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr, u32 len, u32 ampdu_status, struct il_rx_buf *rxb, struct ieee80211_rx_status *stats) { struct sk_buff *skb; __le16 fc = hdr->frame_control; /* We only process data packets if the interface is open */ if (unlikely(!il->is_open)) { D_DROP("Dropping packet while interface is not open.\n"); return; } if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) { il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE); D_INFO("Woke queues - frame received on passive channel\n"); } /* In case of HW accelerated crypto and bad decryption, drop */ if (!il->cfg->mod_params->sw_crypto && il_set_decrypted_flag(il, hdr, ampdu_status, stats)) return; skb = dev_alloc_skb(SMALL_PACKET_SIZE); if (!skb) { IL_ERR("dev_alloc_skb failed\n"); return; } if (len <= SMALL_PACKET_SIZE) { skb_put_data(skb, hdr, len); } else { skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len, PAGE_SIZE << il->hw_params.rx_page_order); il->alloc_rxb_page--; rxb->page = NULL; } il_update_stats(il, false, fc, len); memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); ieee80211_rx(il->hw, skb); } /* Called for N_RX (legacy ABG frames), or * N_RX_MPDU (HT high-throughput N frames). */ static void il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb) { struct ieee80211_hdr *header; struct ieee80211_rx_status rx_status = {}; struct il_rx_pkt *pkt = rxb_addr(rxb); struct il_rx_phy_res *phy_res; __le32 rx_pkt_status; struct il_rx_mpdu_res_start *amsdu; u32 len; u32 ampdu_status; u32 rate_n_flags; /** * N_RX and N_RX_MPDU are handled differently. * N_RX: physical layer info is in this buffer * N_RX_MPDU: physical layer info was sent in separate * command and cached in il->last_phy_res * * Here we set up local variables depending on which command is * received. */ if (pkt->hdr.cmd == N_RX) { phy_res = (struct il_rx_phy_res *)pkt->u.raw; header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) + phy_res->cfg_phy_cnt); len = le16_to_cpu(phy_res->byte_count); rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*phy_res) + phy_res->cfg_phy_cnt + len); ampdu_status = le32_to_cpu(rx_pkt_status); } else { if (!il->_4965.last_phy_res_valid) { IL_ERR("MPDU frame without cached PHY data\n"); return; } phy_res = &il->_4965.last_phy_res; amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw; header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); len = le16_to_cpu(amsdu->byte_count); rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len); ampdu_status = il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status)); } if ((unlikely(phy_res->cfg_phy_cnt > 20))) { D_DROP("dsp size out of range [0,20]: %d\n", phy_res->cfg_phy_cnt); return; } if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status)); return; } /* This will be used in several places later */ rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); /* rx_status carries information about the packet to mac80211 */ rx_status.mactime = le64_to_cpu(phy_res->timestamp); rx_status.band = (phy_res-> phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; rx_status.freq = ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel), rx_status.band); rx_status.rate_idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); rx_status.flag = 0; /* TSF isn't reliable. In order to allow smooth user experience, * this W/A doesn't propagate it to the mac80211 */ /*rx_status.flag |= RX_FLAG_MACTIME_START; */ il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp); /* Find max signal strength (dBm) among 3 antenna/receiver chains */ rx_status.signal = il4965_calc_rssi(il, phy_res); D_STATS("Rssi %d, TSF %llu\n", rx_status.signal, (unsigned long long)rx_status.mactime); /* * "antenna number" * * It seems that the antenna field in the phy flags value * is actually a bit field. This is undefined by radiotap, * it wants an actual antenna number but I always get "7" * for most legacy frames I receive indicating that the * same frame was received on all three RX chains. * * I think this field should be removed in favor of a * new 802.11n radiotap field "RX chains" that is defined * as a bitmask. */ rx_status.antenna = (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> RX_RES_PHY_FLAGS_ANTENNA_POS; /* set the preamble flag if appropriate */ if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE; /* Set up the HT phy flags */ if (rate_n_flags & RATE_MCS_HT_MSK) rx_status.encoding = RX_ENC_HT; if (rate_n_flags & RATE_MCS_HT40_MSK) rx_status.bw = RATE_INFO_BW_40; else rx_status.bw = RATE_INFO_BW_20; if (rate_n_flags & RATE_MCS_SGI_MSK) rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI; if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) { /* We know which subframes of an A-MPDU belong * together since we get a single PHY response * from the firmware for all of them. */ rx_status.flag |= RX_FLAG_AMPDU_DETAILS; rx_status.ampdu_reference = il->_4965.ampdu_ref; } il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb, &rx_status); } /* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY). * This will be used later in il_hdl_rx() for N_RX_MPDU. */ static void il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); il->_4965.last_phy_res_valid = true; il->_4965.ampdu_ref++; memcpy(&il->_4965.last_phy_res, pkt->u.raw, sizeof(struct il_rx_phy_res)); } static int il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif, enum nl80211_band band, u8 is_active, u8 n_probes, struct il_scan_channel *scan_ch) { struct ieee80211_channel *chan; const struct ieee80211_supported_band *sband; const struct il_channel_info *ch_info; u16 passive_dwell = 0; u16 active_dwell = 0; int added, i; u16 channel; sband = il_get_hw_mode(il, band); if (!sband) return 0; active_dwell = il_get_active_dwell_time(il, band, n_probes); passive_dwell = il_get_passive_dwell_time(il, band, vif); if (passive_dwell <= active_dwell) passive_dwell = active_dwell + 1; for (i = 0, added = 0; i < il->scan_request->n_channels; i++) { chan = il->scan_request->channels[i]; if (chan->band != band) continue; channel = chan->hw_value; scan_ch->channel = cpu_to_le16(channel); ch_info = il_get_channel_info(il, band, channel); if (!il_is_channel_valid(ch_info)) { D_SCAN("Channel %d is INVALID for this band.\n", channel); continue; } if (!is_active || il_is_channel_passive(ch_info) || (chan->flags & IEEE80211_CHAN_NO_IR)) scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; else scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; if (n_probes) scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes); scan_ch->active_dwell = cpu_to_le16(active_dwell); scan_ch->passive_dwell = cpu_to_le16(passive_dwell); /* Set txpower levels to defaults */ scan_ch->dsp_atten = 110; /* NOTE: if we were doing 6Mb OFDM for scans we'd use * power level: * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; */ if (band == NL80211_BAND_5GHZ) scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; else scan_ch->tx_gain = ((1 << 5) | (5 << 3)); D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel, le32_to_cpu(scan_ch->type), (scan_ch-> type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE", (scan_ch-> type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell : passive_dwell); scan_ch++; added++; } D_SCAN("total channels to scan %d\n", added); return added; } static void il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid) { int i; u8 ind = *ant; for (i = 0; i < RATE_ANT_NUM - 1; i++) { ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0; if (valid & BIT(ind)) { *ant = ind; return; } } } int il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif) { struct il_host_cmd cmd = { .id = C_SCAN, .len = sizeof(struct il_scan_cmd), .flags = CMD_SIZE_HUGE, }; struct il_scan_cmd *scan; u32 rate_flags = 0; u16 cmd_len; u16 rx_chain = 0; enum nl80211_band band; u8 n_probes = 0; u8 rx_ant = il->hw_params.valid_rx_ant; u8 rate; bool is_active = false; int chan_mod; u8 active_chains; u8 scan_tx_antennas = il->hw_params.valid_tx_ant; int ret; lockdep_assert_held(&il->mutex); if (!il->scan_cmd) { il->scan_cmd = kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE, GFP_KERNEL); if (!il->scan_cmd) { D_SCAN("fail to allocate memory for scan\n"); return -ENOMEM; } } scan = il->scan_cmd; memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE); scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH; scan->quiet_time = IL_ACTIVE_QUIET_TIME; if (il_is_any_associated(il)) { u16 interval; u32 extra; u32 suspend_time = 100; u32 scan_suspend_time = 100; D_INFO("Scanning while associated...\n"); interval = vif->bss_conf.beacon_int; scan->suspend_time = 0; scan->max_out_time = cpu_to_le32(200 * 1024); if (!interval) interval = suspend_time; extra = (suspend_time / interval) << 22; scan_suspend_time = (extra | ((suspend_time % interval) * 1024)); scan->suspend_time = cpu_to_le32(scan_suspend_time); D_SCAN("suspend_time 0x%X beacon interval %d\n", scan_suspend_time, interval); } if (il->scan_request->n_ssids) { int i, p = 0; D_SCAN("Kicking off active scan\n"); for (i = 0; i < il->scan_request->n_ssids; i++) { /* always does wildcard anyway */ if (!il->scan_request->ssids[i].ssid_len) continue; scan->direct_scan[p].id = WLAN_EID_SSID; scan->direct_scan[p].len = il->scan_request->ssids[i].ssid_len; memcpy(scan->direct_scan[p].ssid, il->scan_request->ssids[i].ssid, il->scan_request->ssids[i].ssid_len); n_probes++; p++; } is_active = true; } else D_SCAN("Start passive scan.\n"); scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; scan->tx_cmd.sta_id = il->hw_params.bcast_id; scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; switch (il->scan_band) { case NL80211_BAND_2GHZ: scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; chan_mod = le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >> RXON_FLG_CHANNEL_MODE_POS; if (chan_mod == CHANNEL_MODE_PURE_40) { rate = RATE_6M_PLCP; } else { rate = RATE_1M_PLCP; rate_flags = RATE_MCS_CCK_MSK; } break; case NL80211_BAND_5GHZ: rate = RATE_6M_PLCP; break; default: IL_WARN("Invalid scan band\n"); return -EIO; } /* * If active scanning is requested but a certain channel is * marked passive, we can do active scanning if we detect * transmissions. * * There is an issue with some firmware versions that triggers * a sysassert on a "good CRC threshold" of zero (== disabled), * on a radar channel even though this means that we should NOT * send probes. * * The "good CRC threshold" is the number of frames that we * need to receive during our dwell time on a channel before * sending out probes -- setting this to a huge value will * mean we never reach it, but at the same time work around * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER * here instead of IL_GOOD_CRC_TH_DISABLED. */ scan->good_CRC_th = is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER; band = il->scan_band; if (il->cfg->scan_rx_antennas[band]) rx_ant = il->cfg->scan_rx_antennas[band]; il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas); rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS; scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags); /* In power save mode use one chain, otherwise use all chains */ if (test_bit(S_POWER_PMI, &il->status)) { /* rx_ant has been set to all valid chains previously */ active_chains = rx_ant & ((u8) (il->chain_noise_data.active_chains)); if (!active_chains) active_chains = rx_ant; D_SCAN("chain_noise_data.active_chains: %u\n", il->chain_noise_data.active_chains); rx_ant = il4965_first_antenna(active_chains); } /* MIMO is not used here, but value is required */ rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; scan->rx_chain = cpu_to_le16(rx_chain); cmd_len = il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data, vif->addr, il->scan_request->ie, il->scan_request->ie_len, IL_MAX_SCAN_SIZE - sizeof(*scan)); scan->tx_cmd.len = cpu_to_le16(cmd_len); scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK); scan->channel_count = il4965_get_channels_for_scan(il, vif, band, is_active, n_probes, (void *)&scan->data[cmd_len]); if (scan->channel_count == 0) { D_SCAN("channel count %d\n", scan->channel_count); return -EIO; } cmd.len += le16_to_cpu(scan->tx_cmd.len) + scan->channel_count * sizeof(struct il_scan_channel); cmd.data = scan; scan->len = cpu_to_le16(cmd.len); set_bit(S_SCAN_HW, &il->status); ret = il_send_cmd_sync(il, &cmd); if (ret) clear_bit(S_SCAN_HW, &il->status); return ret; } int il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif, bool add) { struct il_vif_priv *vif_priv = (void *)vif->drv_priv; if (add) return il4965_add_bssid_station(il, vif->bss_conf.bssid, &vif_priv->ibss_bssid_sta_id); return il_remove_station(il, vif_priv->ibss_bssid_sta_id, vif->bss_conf.bssid); } void il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed) { lockdep_assert_held(&il->sta_lock); if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed) il->stations[sta_id].tid[tid].tfds_in_queue -= freed; else { D_TX("free more than tfds_in_queue (%u:%d)\n", il->stations[sta_id].tid[tid].tfds_in_queue, freed); il->stations[sta_id].tid[tid].tfds_in_queue = 0; } } #define IL_TX_QUEUE_MSK 0xfffff static bool il4965_is_single_rx_stream(struct il_priv *il) { return il->current_ht_config.smps == IEEE80211_SMPS_STATIC || il->current_ht_config.single_chain_sufficient; } #define IL_NUM_RX_CHAINS_MULTIPLE 3 #define IL_NUM_RX_CHAINS_SINGLE 2 #define IL_NUM_IDLE_CHAINS_DUAL 2 #define IL_NUM_IDLE_CHAINS_SINGLE 1 /* * Determine how many receiver/antenna chains to use. * * More provides better reception via diversity. Fewer saves power * at the expense of throughput, but only when not in powersave to * start with. * * MIMO (dual stream) requires at least 2, but works better with 3. * This does not determine *which* chains to use, just how many. */ static int il4965_get_active_rx_chain_count(struct il_priv *il) { /* # of Rx chains to use when expecting MIMO. */ if (il4965_is_single_rx_stream(il)) return IL_NUM_RX_CHAINS_SINGLE; else return IL_NUM_RX_CHAINS_MULTIPLE; } /* * When we are in power saving mode, unless device support spatial * multiplexing power save, use the active count for rx chain count. */ static int il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt) { /* # Rx chains when idling, depending on SMPS mode */ switch (il->current_ht_config.smps) { case IEEE80211_SMPS_STATIC: case IEEE80211_SMPS_DYNAMIC: return IL_NUM_IDLE_CHAINS_SINGLE; case IEEE80211_SMPS_OFF: return active_cnt; default: WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps); return active_cnt; } } /* up to 4 chains */ static u8 il4965_count_chain_bitmap(u32 chain_bitmap) { u8 res; res = (chain_bitmap & BIT(0)) >> 0; res += (chain_bitmap & BIT(1)) >> 1; res += (chain_bitmap & BIT(2)) >> 2; res += (chain_bitmap & BIT(3)) >> 3; return res; } /* * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image * * Selects how many and which Rx receivers/antennas/chains to use. * This should not be used for scan command ... it puts data in wrong place. */ void il4965_set_rxon_chain(struct il_priv *il) { bool is_single = il4965_is_single_rx_stream(il); bool is_cam = !test_bit(S_POWER_PMI, &il->status); u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt; u32 active_chains; u16 rx_chain; /* Tell uCode which antennas are actually connected. * Before first association, we assume all antennas are connected. * Just after first association, il4965_chain_noise_calibration() * checks which antennas actually *are* connected. */ if (il->chain_noise_data.active_chains) active_chains = il->chain_noise_data.active_chains; else active_chains = il->hw_params.valid_rx_ant; rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS; /* How many receivers should we use? */ active_rx_cnt = il4965_get_active_rx_chain_count(il); idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt); /* correct rx chain count according hw settings * and chain noise calibration */ valid_rx_cnt = il4965_count_chain_bitmap(active_chains); if (valid_rx_cnt < active_rx_cnt) active_rx_cnt = valid_rx_cnt; if (valid_rx_cnt < idle_rx_cnt) idle_rx_cnt = valid_rx_cnt; rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS; rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS; il->staging.rx_chain = cpu_to_le16(rx_chain); if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam) il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK; else il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK; D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain, active_rx_cnt, idle_rx_cnt); WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 || active_rx_cnt < idle_rx_cnt); } static const char * il4965_get_fh_string(int cmd) { switch (cmd) { IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG); IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG); IL_CMD(FH49_RSCSR_CHNL0_WPTR); IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG); IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG); IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG); IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); IL_CMD(FH49_TSSR_TX_STATUS_REG); IL_CMD(FH49_TSSR_TX_ERROR_REG); default: return "UNKNOWN"; } } int il4965_dump_fh(struct il_priv *il, char **buf, bool display) { int i; #ifdef CONFIG_IWLEGACY_DEBUG int pos = 0; size_t bufsz = 0; #endif static const u32 fh_tbl[] = { FH49_RSCSR_CHNL0_STTS_WPTR_REG, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, FH49_RSCSR_CHNL0_WPTR, FH49_MEM_RCSR_CHNL0_CONFIG_REG, FH49_MEM_RSSR_SHARED_CTRL_REG, FH49_MEM_RSSR_RX_STATUS_REG, FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, FH49_TSSR_TX_STATUS_REG, FH49_TSSR_TX_ERROR_REG }; #ifdef CONFIG_IWLEGACY_DEBUG if (display) { bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; *buf = kmalloc(bufsz, GFP_KERNEL); if (!*buf) return -ENOMEM; pos += scnprintf(*buf + pos, bufsz - pos, "FH register values:\n"); for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { pos += scnprintf(*buf + pos, bufsz - pos, " %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]), il_rd(il, fh_tbl[i])); } return pos; } #endif IL_ERR("FH register values:\n"); for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]), il_rd(il, fh_tbl[i])); } return 0; } static void il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); struct il_missed_beacon_notif *missed_beacon; missed_beacon = &pkt->u.missed_beacon; if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) > il->missed_beacon_threshold) { D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n", le32_to_cpu(missed_beacon->consecutive_missed_beacons), le32_to_cpu(missed_beacon->total_missed_becons), le32_to_cpu(missed_beacon->num_recvd_beacons), le32_to_cpu(missed_beacon->num_expected_beacons)); if (!test_bit(S_SCANNING, &il->status)) il4965_init_sensitivity(il); } } /* Calculate noise level, based on measurements during network silence just * before arriving beacon. This measurement can be done only if we know * exactly when to expect beacons, therefore only when we're associated. */ static void il4965_rx_calc_noise(struct il_priv *il) { struct stats_rx_non_phy *rx_info; int num_active_rx = 0; int total_silence = 0; int bcn_silence_a, bcn_silence_b, bcn_silence_c; int last_rx_noise; rx_info = &(il->_4965.stats.rx.general); bcn_silence_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; bcn_silence_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; bcn_silence_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; if (bcn_silence_a) { total_silence += bcn_silence_a; num_active_rx++; } if (bcn_silence_b) { total_silence += bcn_silence_b; num_active_rx++; } if (bcn_silence_c) { total_silence += bcn_silence_c; num_active_rx++; } /* Average among active antennas */ if (num_active_rx) last_rx_noise = (total_silence / num_active_rx) - 107; else last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE; D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a, bcn_silence_b, bcn_silence_c, last_rx_noise); } #ifdef CONFIG_IWLEGACY_DEBUGFS /* * based on the assumption of all stats counter are in DWORD * FIXME: This function is for debugging, do not deal with * the case of counters roll-over. */ static void il4965_accumulative_stats(struct il_priv *il, __le32 * stats) { int i, size; __le32 *prev_stats; u32 *accum_stats; u32 *delta, *max_delta; struct stats_general_common *general, *accum_general; prev_stats = (__le32 *) &il->_4965.stats; accum_stats = (u32 *) &il->_4965.accum_stats; size = sizeof(struct il_notif_stats); general = &il->_4965.stats.general.common; accum_general = &il->_4965.accum_stats.general.common; delta = (u32 *) &il->_4965.delta_stats; max_delta = (u32 *) &il->_4965.max_delta; for (i = sizeof(__le32); i < size; i += sizeof(__le32), stats++, prev_stats++, delta++, max_delta++, accum_stats++) { if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) { *delta = (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats)); *accum_stats += *delta; if (*delta > *max_delta) *max_delta = *delta; } } /* reset accumulative stats for "no-counter" type stats */ accum_general->temperature = general->temperature; accum_general->ttl_timestamp = general->ttl_timestamp; } #endif static void il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb) { const int recalib_seconds = 60; bool change; struct il_rx_pkt *pkt = rxb_addr(rxb); D_RX("Statistics notification received (%d vs %d).\n", (int)sizeof(struct il_notif_stats), le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK); change = ((il->_4965.stats.general.common.temperature != pkt->u.stats.general.common.temperature) || ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) != (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK))); #ifdef CONFIG_IWLEGACY_DEBUGFS il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats); #endif /* TODO: reading some of stats is unneeded */ memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats)); set_bit(S_STATS, &il->status); /* * Reschedule the stats timer to occur in recalib_seconds to ensure * we get a thermal update even if the uCode doesn't give us one */ mod_timer(&il->stats_periodic, jiffies + msecs_to_jiffies(recalib_seconds * 1000)); if (unlikely(!test_bit(S_SCANNING, &il->status)) && (pkt->hdr.cmd == N_STATS)) { il4965_rx_calc_noise(il); queue_work(il->workqueue, &il->run_time_calib_work); } if (change) il4965_temperature_calib(il); } static void il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) { #ifdef CONFIG_IWLEGACY_DEBUGFS memset(&il->_4965.accum_stats, 0, sizeof(struct il_notif_stats)); memset(&il->_4965.delta_stats, 0, sizeof(struct il_notif_stats)); memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats)); #endif D_RX("Statistics have been cleared\n"); } il4965_hdl_stats(il, rxb); } /* * mac80211 queues, ACs, hardware queues, FIFOs. * * Cf. https://wireless.wiki.kernel.org/en/developers/Documentation/mac80211/queues * * Mac80211 uses the following numbers, which we get as from it * by way of skb_get_queue_mapping(skb): * * VO 0 * VI 1 * BE 2 * BK 3 * * * Regular (not A-MPDU) frames are put into hardware queues corresponding * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their * own queue per aggregation session (RA/TID combination), such queues are * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In * order to map frames to the right queue, we also need an AC->hw queue * mapping. This is implemented here. * * Due to the way hw queues are set up (by the hw specific modules like * 4965.c), the AC->hw queue mapping is the identity * mapping. */ static const u8 tid_to_ac[] = { IEEE80211_AC_BE, IEEE80211_AC_BK, IEEE80211_AC_BK, IEEE80211_AC_BE, IEEE80211_AC_VI, IEEE80211_AC_VI, IEEE80211_AC_VO, IEEE80211_AC_VO }; static inline int il4965_get_ac_from_tid(u16 tid) { if (likely(tid < ARRAY_SIZE(tid_to_ac))) return tid_to_ac[tid]; /* no support for TIDs 8-15 yet */ return -EINVAL; } static inline int il4965_get_fifo_from_tid(u16 tid) { static const u8 ac_to_fifo[] = { IL_TX_FIFO_VO, IL_TX_FIFO_VI, IL_TX_FIFO_BE, IL_TX_FIFO_BK, }; if (likely(tid < ARRAY_SIZE(tid_to_ac))) return ac_to_fifo[tid_to_ac[tid]]; /* no support for TIDs 8-15 yet */ return -EINVAL; } /* * handle build C_TX command notification. */ static void il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb, struct il_tx_cmd *tx_cmd, struct ieee80211_tx_info *info, struct ieee80211_hdr *hdr, u8 std_id) { __le16 fc = hdr->frame_control; __le32 tx_flags = tx_cmd->tx_flags; tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { tx_flags |= TX_CMD_FLG_ACK_MSK; if (ieee80211_is_mgmt(fc)) tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; if (ieee80211_is_probe_resp(fc) && !(le16_to_cpu(hdr->seq_ctrl) & 0xf)) tx_flags |= TX_CMD_FLG_TSF_MSK; } else { tx_flags &= (~TX_CMD_FLG_ACK_MSK); tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; } if (ieee80211_is_back_req(fc)) tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; tx_cmd->sta_id = std_id; if (ieee80211_has_morefrags(fc)) tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; if (ieee80211_is_data_qos(fc)) { u8 *qc = ieee80211_get_qos_ctl(hdr); tx_cmd->tid_tspec = qc[0] & 0xf; tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; } else { tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; } il_tx_cmd_protection(il, info, fc, &tx_flags); tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); if (ieee80211_is_mgmt(fc)) { if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); else tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); } else { tx_cmd->timeout.pm_frame_timeout = 0; } tx_cmd->driver_txop = 0; tx_cmd->tx_flags = tx_flags; tx_cmd->next_frame_len = 0; } static void il4965_tx_cmd_build_rate(struct il_priv *il, struct il_tx_cmd *tx_cmd, struct ieee80211_tx_info *info, struct ieee80211_sta *sta, __le16 fc) { const u8 rts_retry_limit = 60; u32 rate_flags; int rate_idx; u8 data_retry_limit; u8 rate_plcp; /* Set retry limit on DATA packets and Probe Responses */ if (ieee80211_is_probe_resp(fc)) data_retry_limit = 3; else data_retry_limit = IL4965_DEFAULT_TX_RETRY; tx_cmd->data_retry_limit = data_retry_limit; /* Set retry limit on RTS packets */ tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit); /* DATA packets will use the uCode station table for rate/antenna * selection */ if (ieee80211_is_data(fc)) { tx_cmd->initial_rate_idx = 0; tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; return; } /** * If the current TX rate stored in mac80211 has the MCS bit set, it's * not really a TX rate. Thus, we use the lowest supported rate for * this band. Also use the lowest supported rate if the stored rate * idx is invalid. */ rate_idx = info->control.rates[0].idx; if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0 || rate_idx > RATE_COUNT_LEGACY) rate_idx = rate_lowest_index(&il->bands[info->band], sta); /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ if (info->band == NL80211_BAND_5GHZ) rate_idx += IL_FIRST_OFDM_RATE; /* Get PLCP rate for tx_cmd->rate_n_flags */ rate_plcp = il_rates[rate_idx].plcp; /* Zero out flags for this packet */ rate_flags = 0; /* Set CCK flag as needed */ if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE) rate_flags |= RATE_MCS_CCK_MSK; /* Set up antennas */ il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; /* Set the rate in the TX cmd */ tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags); } static void il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info, struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag, int sta_id) { struct ieee80211_key_conf *keyconf = info->control.hw_key; switch (keyconf->cipher) { case WLAN_CIPHER_SUITE_CCMP: tx_cmd->sec_ctl = TX_CMD_SEC_CCM; memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); if (info->flags & IEEE80211_TX_CTL_AMPDU) tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; D_TX("tx_cmd with AES hwcrypto\n"); break; case WLAN_CIPHER_SUITE_TKIP: tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); D_TX("tx_cmd with tkip hwcrypto\n"); break; case WLAN_CIPHER_SUITE_WEP104: tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; fallthrough; case WLAN_CIPHER_SUITE_WEP40: tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); D_TX("Configuring packet for WEP encryption " "with key %d\n", keyconf->keyidx); break; default: IL_ERR("Unknown encode cipher %x\n", keyconf->cipher); break; } } /* * start C_TX command process */ int il4965_tx_skb(struct il_priv *il, struct ieee80211_sta *sta, struct sk_buff *skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct il_station_priv *sta_priv = NULL; struct il_tx_queue *txq; struct il_queue *q; struct il_device_cmd *out_cmd; struct il_cmd_meta *out_meta; struct il_tx_cmd *tx_cmd; int txq_id; dma_addr_t phys_addr; dma_addr_t txcmd_phys; dma_addr_t scratch_phys; u16 len, firstlen, secondlen; u16 seq_number = 0; __le16 fc; u8 hdr_len; u8 sta_id; u8 wait_write_ptr = 0; u8 tid = 0; u8 *qc = NULL; unsigned long flags; bool is_agg = false; spin_lock_irqsave(&il->lock, flags); if (il_is_rfkill(il)) { D_DROP("Dropping - RF KILL\n"); goto drop_unlock; } fc = hdr->frame_control; #ifdef CONFIG_IWLEGACY_DEBUG if (ieee80211_is_auth(fc)) D_TX("Sending AUTH frame\n"); else if (ieee80211_is_assoc_req(fc)) D_TX("Sending ASSOC frame\n"); else if (ieee80211_is_reassoc_req(fc)) D_TX("Sending REASSOC frame\n"); #endif hdr_len = ieee80211_hdrlen(fc); /* For management frames use broadcast id to do not break aggregation */ if (!ieee80211_is_data(fc)) sta_id = il->hw_params.bcast_id; else { /* Find idx into station table for destination station */ sta_id = il_sta_id_or_broadcast(il, sta); if (sta_id == IL_INVALID_STATION) { D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1); goto drop_unlock; } } D_TX("station Id %d\n", sta_id); if (sta) sta_priv = (void *)sta->drv_priv; if (sta_priv && sta_priv->asleep && (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { /* * This sends an asynchronous command to the device, * but we can rely on it being processed before the * next frame is processed -- and the next frame to * this station is the one that will consume this * counter. * For now set the counter to just 1 since we do not * support uAPSD yet. */ il4965_sta_modify_sleep_tx_count(il, sta_id, 1); } /* FIXME: remove me ? */ WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); /* Access category (AC) is also the queue number */ txq_id = skb_get_queue_mapping(skb); /* irqs already disabled/saved above when locking il->lock */ spin_lock(&il->sta_lock); if (ieee80211_is_data_qos(fc)) { qc = ieee80211_get_qos_ctl(hdr); tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) { spin_unlock(&il->sta_lock); goto drop_unlock; } seq_number = il->stations[sta_id].tid[tid].seq_number; seq_number &= IEEE80211_SCTL_SEQ; hdr->seq_ctrl = hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG); hdr->seq_ctrl |= cpu_to_le16(seq_number); seq_number += 0x10; /* aggregation is on for this <sta,tid> */ if (info->flags & IEEE80211_TX_CTL_AMPDU && il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) { txq_id = il->stations[sta_id].tid[tid].agg.txq_id; is_agg = true; } } txq = &il->txq[txq_id]; q = &txq->q; if (unlikely(il_queue_space(q) < q->high_mark)) { spin_unlock(&il->sta_lock); goto drop_unlock; } if (ieee80211_is_data_qos(fc)) { il->stations[sta_id].tid[tid].tfds_in_queue++; if (!ieee80211_has_morefrags(fc)) il->stations[sta_id].tid[tid].seq_number = seq_number; } spin_unlock(&il->sta_lock); txq->skbs[q->write_ptr] = skb; /* Set up first empty entry in queue's array of Tx/cmd buffers */ out_cmd = txq->cmd[q->write_ptr]; out_meta = &txq->meta[q->write_ptr]; tx_cmd = &out_cmd->cmd.tx; memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); memset(tx_cmd, 0, sizeof(struct il_tx_cmd)); /* * Set up the Tx-command (not MAC!) header. * Store the chosen Tx queue and TFD idx within the sequence field; * after Tx, uCode's Tx response will return this value so driver can * locate the frame within the tx queue and do post-tx processing. */ out_cmd->hdr.cmd = C_TX; out_cmd->hdr.sequence = cpu_to_le16((u16) (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr))); /* Copy MAC header from skb into command buffer */ memcpy(tx_cmd->hdr, hdr, hdr_len); /* Total # bytes to be transmitted */ tx_cmd->len = cpu_to_le16((u16) skb->len); if (info->control.hw_key) il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id); /* TODO need this for burst mode later on */ il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id); il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc); /* * Use the first empty entry in this queue's command buffer array * to contain the Tx command and MAC header concatenated together * (payload data will be in another buffer). * Size of this varies, due to varying MAC header length. * If end is not dword aligned, we'll have 2 extra bytes at the end * of the MAC header (device reads on dword boundaries). * We'll tell device about this padding later. */ len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len; firstlen = (len + 3) & ~3; /* Tell NIC about any 2-byte padding after MAC header */ if (firstlen != len) tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; /* Physical address of this Tx command's header (not MAC header!), * within command buffer array. */ txcmd_phys = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, firstlen, DMA_BIDIRECTIONAL); if (unlikely(dma_mapping_error(&il->pci_dev->dev, txcmd_phys))) goto drop_unlock; /* Set up TFD's 2nd entry to point directly to remainder of skb, * if any (802.11 null frames have no payload). */ secondlen = skb->len - hdr_len; if (secondlen > 0) { phys_addr = dma_map_single(&il->pci_dev->dev, skb->data + hdr_len, secondlen, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr))) goto drop_unlock; } /* Add buffer containing Tx command and MAC(!) header to TFD's * first entry */ il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0); dma_unmap_addr_set(out_meta, mapping, txcmd_phys); dma_unmap_len_set(out_meta, len, firstlen); if (secondlen) il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 0, 0); if (!ieee80211_has_morefrags(hdr->frame_control)) { txq->need_update = 1; } else { wait_write_ptr = 1; txq->need_update = 0; } scratch_phys = txcmd_phys + sizeof(struct il_cmd_header) + offsetof(struct il_tx_cmd, scratch); /* take back ownership of DMA buffer to enable update */ dma_sync_single_for_cpu(&il->pci_dev->dev, txcmd_phys, firstlen, DMA_BIDIRECTIONAL); tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys); il_update_stats(il, true, fc, skb->len); D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence)); D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd)); il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len); /* Set up entry for this TFD in Tx byte-count array */ if (info->flags & IEEE80211_TX_CTL_AMPDU) il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len)); dma_sync_single_for_device(&il->pci_dev->dev, txcmd_phys, firstlen, DMA_BIDIRECTIONAL); /* Tell device the write idx *just past* this latest filled TFD */ q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd); il_txq_update_write_ptr(il, txq); spin_unlock_irqrestore(&il->lock, flags); /* * At this point the frame is "transmitted" successfully * and we will get a TX status notification eventually, * regardless of the value of ret. "ret" only indicates * whether or not we should update the write pointer. */ /* * Avoid atomic ops if it isn't an associated client. * Also, if this is a packet for aggregation, don't * increase the counter because the ucode will stop * aggregation queues when their respective station * goes to sleep. */ if (sta_priv && sta_priv->client && !is_agg) atomic_inc(&sta_priv->pending_frames); if (il_queue_space(q) < q->high_mark && il->mac80211_registered) { if (wait_write_ptr) { spin_lock_irqsave(&il->lock, flags); txq->need_update = 1; il_txq_update_write_ptr(il, txq); spin_unlock_irqrestore(&il->lock, flags); } else { il_stop_queue(il, txq); } } return 0; drop_unlock: spin_unlock_irqrestore(&il->lock, flags); return -1; } static inline int il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size) { ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma, GFP_KERNEL); if (!ptr->addr) return -ENOMEM; ptr->size = size; return 0; } static inline void il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr) { if (unlikely(!ptr->addr)) return; dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma); memset(ptr, 0, sizeof(*ptr)); } /* * il4965_hw_txq_ctx_free - Free TXQ Context * * Destroy all TX DMA queues and structures */ void il4965_hw_txq_ctx_free(struct il_priv *il) { int txq_id; /* Tx queues */ if (il->txq) { for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) if (txq_id == il->cmd_queue) il_cmd_queue_free(il); else il_tx_queue_free(il, txq_id); } il4965_free_dma_ptr(il, &il->kw); il4965_free_dma_ptr(il, &il->scd_bc_tbls); /* free tx queue structure */ il_free_txq_mem(il); } /* * il4965_txq_ctx_alloc - allocate TX queue context * Allocate all Tx DMA structures and initialize them */ int il4965_txq_ctx_alloc(struct il_priv *il) { int ret, txq_id; unsigned long flags; /* Free all tx/cmd queues and keep-warm buffer */ il4965_hw_txq_ctx_free(il); ret = il4965_alloc_dma_ptr(il, &il->scd_bc_tbls, il->hw_params.scd_bc_tbls_size); if (ret) { IL_ERR("Scheduler BC Table allocation failed\n"); goto error_bc_tbls; } /* Alloc keep-warm buffer */ ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE); if (ret) { IL_ERR("Keep Warm allocation failed\n"); goto error_kw; } /* allocate tx queue structure */ ret = il_alloc_txq_mem(il); if (ret) goto error; spin_lock_irqsave(&il->lock, flags); /* Turn off all Tx DMA fifos */ il4965_txq_set_sched(il, 0); /* Tell NIC where to find the "keep warm" buffer */ il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); spin_unlock_irqrestore(&il->lock, flags); /* Alloc and init all Tx queues, including the command queue (#4/#9) */ for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) { ret = il_tx_queue_init(il, txq_id); if (ret) { IL_ERR("Tx %d queue init failed\n", txq_id); goto error; } } return ret; error: il4965_hw_txq_ctx_free(il); il4965_free_dma_ptr(il, &il->kw); error_kw: il4965_free_dma_ptr(il, &il->scd_bc_tbls); error_bc_tbls: return ret; } void il4965_txq_ctx_reset(struct il_priv *il) { int txq_id; unsigned long flags; spin_lock_irqsave(&il->lock, flags); /* Turn off all Tx DMA fifos */ il4965_txq_set_sched(il, 0); /* Tell NIC where to find the "keep warm" buffer */ il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); spin_unlock_irqrestore(&il->lock, flags); /* Alloc and init all Tx queues, including the command queue (#4) */ for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) il_tx_queue_reset(il, txq_id); } static void il4965_txq_ctx_unmap(struct il_priv *il) { int txq_id; if (!il->txq) return; /* Unmap DMA from host system and free skb's */ for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) if (txq_id == il->cmd_queue) il_cmd_queue_unmap(il); else il_tx_queue_unmap(il, txq_id); } /* * il4965_txq_ctx_stop - Stop all Tx DMA channels */ void il4965_txq_ctx_stop(struct il_priv *il) { int ch, ret; _il_wr_prph(il, IL49_SCD_TXFACT, 0); /* Stop each Tx DMA channel, and wait for it to be idle */ for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) { _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); ret = _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG, FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 1000); if (ret < 0) IL_ERR("Timeout stopping DMA channel %d [0x%08x]", ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG)); } } /* * Find first available (lowest unused) Tx Queue, mark it "active". * Called only when finding queue for aggregation. * Should never return anything < 7, because they should already * be in use as EDCA AC (0-3), Command (4), reserved (5, 6) */ static int il4965_txq_ctx_activate_free(struct il_priv *il) { int txq_id; for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk)) return txq_id; return -1; } /* * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration */ static void il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id) { /* Simply stop the queue, but don't change any configuration; * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */ il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); } /* * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue */ static int il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id) { u32 tbl_dw_addr; u32 tbl_dw; u16 scd_q2ratid; scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK; tbl_dw_addr = il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id); tbl_dw = il_read_targ_mem(il, tbl_dw_addr); if (txq_id & 0x1) tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); else tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); il_write_targ_mem(il, tbl_dw_addr, tbl_dw); return 0; } /* * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue * * NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE, * i.e. it must be one of the higher queues used for aggregation */ static int il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id, int tid, u16 ssn_idx) { unsigned long flags; u16 ra_tid; int ret; if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || (IL49_FIRST_AMPDU_QUEUE + il->cfg->num_of_ampdu_queues <= txq_id)) { IL_WARN("queue number out of range: %d, must be %d to %d\n", txq_id, IL49_FIRST_AMPDU_QUEUE, IL49_FIRST_AMPDU_QUEUE + il->cfg->num_of_ampdu_queues - 1); return -EINVAL; } ra_tid = BUILD_RAxTID(sta_id, tid); /* Modify device's station table to Tx this TID */ ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid); if (ret) return ret; spin_lock_irqsave(&il->lock, flags); /* Stop this Tx queue before configuring it */ il4965_tx_queue_stop_scheduler(il, txq_id); /* Map receiver-address / traffic-ID to this queue */ il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id); /* Set this queue as a chain-building queue */ il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); /* Place first TFD at idx corresponding to start sequence number. * Assumes that ssn_idx is valid (!= 0xFFF) */ il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); il4965_set_wr_ptrs(il, txq_id, ssn_idx); /* Set up Tx win size and frame limit for this queue */ il_write_targ_mem(il, il->scd_base_addr + IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id), (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); il_write_targ_mem(il, il->scd_base_addr + IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), (SCD_FRAME_LIMIT << IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */ il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1); spin_unlock_irqrestore(&il->lock, flags); return 0; } int il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif, struct ieee80211_sta *sta, u16 tid, u16 * ssn) { int sta_id; int tx_fifo; int txq_id; int ret; unsigned long flags; struct il_tid_data *tid_data; /* FIXME: warning if tx fifo not found ? */ tx_fifo = il4965_get_fifo_from_tid(tid); if (unlikely(tx_fifo < 0)) return tx_fifo; D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid); sta_id = il_sta_id(sta); if (sta_id == IL_INVALID_STATION) { IL_ERR("Start AGG on invalid station\n"); return -ENXIO; } if (unlikely(tid >= MAX_TID_COUNT)) return -EINVAL; if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) { IL_ERR("Start AGG when state is not IL_AGG_OFF !\n"); return -ENXIO; } txq_id = il4965_txq_ctx_activate_free(il); if (txq_id == -1) { IL_ERR("No free aggregation queue available\n"); return -ENXIO; } spin_lock_irqsave(&il->sta_lock, flags); tid_data = &il->stations[sta_id].tid[tid]; *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); tid_data->agg.txq_id = txq_id; il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id); spin_unlock_irqrestore(&il->sta_lock, flags); ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn); if (ret) return ret; spin_lock_irqsave(&il->sta_lock, flags); tid_data = &il->stations[sta_id].tid[tid]; if (tid_data->tfds_in_queue == 0) { D_HT("HW queue is empty\n"); tid_data->agg.state = IL_AGG_ON; ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; } else { D_HT("HW queue is NOT empty: %d packets in HW queue\n", tid_data->tfds_in_queue); tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA; } spin_unlock_irqrestore(&il->sta_lock, flags); return ret; } /* * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE * il->lock must be held by the caller */ static int il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo) { if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || (IL49_FIRST_AMPDU_QUEUE + il->cfg->num_of_ampdu_queues <= txq_id)) { IL_WARN("queue number out of range: %d, must be %d to %d\n", txq_id, IL49_FIRST_AMPDU_QUEUE, IL49_FIRST_AMPDU_QUEUE + il->cfg->num_of_ampdu_queues - 1); return -EINVAL; } il4965_tx_queue_stop_scheduler(il, txq_id); il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); /* supposes that ssn_idx is valid (!= 0xFFF) */ il4965_set_wr_ptrs(il, txq_id, ssn_idx); il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); il_txq_ctx_deactivate(il, txq_id); il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0); return 0; } int il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif, struct ieee80211_sta *sta, u16 tid) { int tx_fifo_id, txq_id, sta_id, ssn; struct il_tid_data *tid_data; int write_ptr, read_ptr; unsigned long flags; /* FIXME: warning if tx_fifo_id not found ? */ tx_fifo_id = il4965_get_fifo_from_tid(tid); if (unlikely(tx_fifo_id < 0)) return tx_fifo_id; sta_id = il_sta_id(sta); if (sta_id == IL_INVALID_STATION) { IL_ERR("Invalid station for AGG tid %d\n", tid); return -ENXIO; } spin_lock_irqsave(&il->sta_lock, flags); tid_data = &il->stations[sta_id].tid[tid]; ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; txq_id = tid_data->agg.txq_id; switch (il->stations[sta_id].tid[tid].agg.state) { case IL_EMPTYING_HW_QUEUE_ADDBA: /* * This can happen if the peer stops aggregation * again before we've had a chance to drain the * queue we selected previously, i.e. before the * session was really started completely. */ D_HT("AGG stop before setup done\n"); goto turn_off; case IL_AGG_ON: break; default: IL_WARN("Stopping AGG while state not ON or starting\n"); } write_ptr = il->txq[txq_id].q.write_ptr; read_ptr = il->txq[txq_id].q.read_ptr; /* The queue is not empty */ if (write_ptr != read_ptr) { D_HT("Stopping a non empty AGG HW QUEUE\n"); il->stations[sta_id].tid[tid].agg.state = IL_EMPTYING_HW_QUEUE_DELBA; spin_unlock_irqrestore(&il->sta_lock, flags); return 0; } D_HT("HW queue is empty\n"); turn_off: il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF; /* do not restore/save irqs */ spin_unlock(&il->sta_lock); spin_lock(&il->lock); /* * the only reason this call can fail is queue number out of range, * which can happen if uCode is reloaded and all the station * information are lost. if it is outside the range, there is no need * to deactivate the uCode queue, just return "success" to allow * mac80211 to clean up it own data. */ il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id); spin_unlock_irqrestore(&il->lock, flags); ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); return 0; } int il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id) { struct il_queue *q = &il->txq[txq_id].q; u8 *addr = il->stations[sta_id].sta.sta.addr; struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid]; lockdep_assert_held(&il->sta_lock); switch (il->stations[sta_id].tid[tid].agg.state) { case IL_EMPTYING_HW_QUEUE_DELBA: /* We are reclaiming the last packet of the */ /* aggregated HW queue */ if (txq_id == tid_data->agg.txq_id && q->read_ptr == q->write_ptr) { u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); int tx_fifo = il4965_get_fifo_from_tid(tid); D_HT("HW queue empty: continue DELBA flow\n"); il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo); tid_data->agg.state = IL_AGG_OFF; ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid); } break; case IL_EMPTYING_HW_QUEUE_ADDBA: /* We are reclaiming the last packet of the queue */ if (tid_data->tfds_in_queue == 0) { D_HT("HW queue empty: continue ADDBA flow\n"); tid_data->agg.state = IL_AGG_ON; ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid); } break; } return 0; } static void il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1) { struct ieee80211_sta *sta; struct il_station_priv *sta_priv; rcu_read_lock(); sta = ieee80211_find_sta(il->vif, addr1); if (sta) { sta_priv = (void *)sta->drv_priv; /* avoid atomic ops if this isn't a client */ if (sta_priv->client && atomic_dec_return(&sta_priv->pending_frames) == 0) ieee80211_sta_block_awake(il->hw, sta, false); } rcu_read_unlock(); } static void il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; if (!is_agg) il4965_non_agg_tx_status(il, hdr->addr1); ieee80211_tx_status_irqsafe(il->hw, skb); } int il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx) { struct il_tx_queue *txq = &il->txq[txq_id]; struct il_queue *q = &txq->q; int nfreed = 0; struct ieee80211_hdr *hdr; struct sk_buff *skb; if (idx >= q->n_bd || il_queue_used(q, idx) == 0) { IL_ERR("Read idx for DMA queue txq id (%d), idx %d, " "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd, q->write_ptr, q->read_ptr); return 0; } for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx; q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) { skb = txq->skbs[txq->q.read_ptr]; if (WARN_ON_ONCE(skb == NULL)) continue; hdr = (struct ieee80211_hdr *) skb->data; if (ieee80211_is_data_qos(hdr->frame_control)) nfreed++; il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE); txq->skbs[txq->q.read_ptr] = NULL; il->ops->txq_free_tfd(il, txq); } return nfreed; } /* * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack * * Go through block-ack's bitmap of ACK'd frames, update driver's record of * ACK vs. not. This gets sent to mac80211, then to rate scaling algo. */ static int il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg, struct il_compressed_ba_resp *ba_resp) { int i, sh, ack; u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl); u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); int successes = 0; struct ieee80211_tx_info *info; u64 bitmap, sent_bitmap; if (unlikely(!agg->wait_for_ba)) { if (unlikely(ba_resp->bitmap)) IL_ERR("Received BA when not expected\n"); return -EINVAL; } /* Mark that the expected block-ack response arrived */ agg->wait_for_ba = 0; D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl); /* Calculate shift to align block-ack bits with our Tx win bits */ sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4); if (sh < 0) /* tbw something is wrong with indices */ sh += 0x100; if (agg->frame_count > (64 - sh)) { D_TX_REPLY("more frames than bitmap size"); return -1; } /* don't use 64-bit values for now */ bitmap = le64_to_cpu(ba_resp->bitmap) >> sh; /* check for success or failure according to the * transmitted bitmap and block-ack bitmap */ sent_bitmap = bitmap & agg->bitmap; /* For each frame attempted in aggregation, * update driver's record of tx frame's status. */ i = 0; while (sent_bitmap) { ack = sent_bitmap & 1ULL; successes += ack; D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK", i, (agg->start_idx + i) & 0xff, agg->start_idx + i); sent_bitmap >>= 1; ++i; } D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap); info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]); memset(&info->status, 0, sizeof(info->status)); info->flags |= IEEE80211_TX_STAT_ACK; info->flags |= IEEE80211_TX_STAT_AMPDU; info->status.ampdu_ack_len = successes; info->status.ampdu_len = agg->frame_count; il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info); return 0; } static inline bool il4965_is_tx_success(u32 status) { status &= TX_STATUS_MSK; return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE); } static u8 il4965_find_station(struct il_priv *il, const u8 *addr) { int i; int start = 0; int ret = IL_INVALID_STATION; unsigned long flags; if (il->iw_mode == NL80211_IFTYPE_ADHOC) start = IL_STA_ID; if (is_broadcast_ether_addr(addr)) return il->hw_params.bcast_id; spin_lock_irqsave(&il->sta_lock, flags); for (i = start; i < il->hw_params.max_stations; i++) if (il->stations[i].used && ether_addr_equal(il->stations[i].sta.sta.addr, addr)) { ret = i; goto out; } D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations); out: /* * It may be possible that more commands interacting with stations * arrive before we completed processing the adding of * station */ if (ret != IL_INVALID_STATION && (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) || (il->stations[ret].used & IL_STA_UCODE_INPROGRESS))) { IL_ERR("Requested station info for sta %d before ready.\n", ret); ret = IL_INVALID_STATION; } spin_unlock_irqrestore(&il->sta_lock, flags); return ret; } static int il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr) { if (il->iw_mode == NL80211_IFTYPE_STATION) return IL_AP_ID; else { u8 *da = ieee80211_get_DA(hdr); return il4965_find_station(il, da); } } static inline u32 il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp) { return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & IEEE80211_MAX_SN; } static inline u32 il4965_tx_status_to_mac80211(u32 status) { status &= TX_STATUS_MSK; switch (status) { case TX_STATUS_SUCCESS: case TX_STATUS_DIRECT_DONE: return IEEE80211_TX_STAT_ACK; case TX_STATUS_FAIL_DEST_PS: return IEEE80211_TX_STAT_TX_FILTERED; default: return 0; } } /* * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue */ static int il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg, struct il4965_tx_resp *tx_resp, int txq_id, u16 start_idx) { u16 status; struct agg_tx_status *frame_status = tx_resp->u.agg_status; struct ieee80211_tx_info *info = NULL; struct ieee80211_hdr *hdr = NULL; u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); int i, sh, idx; u16 seq; if (agg->wait_for_ba) D_TX_REPLY("got tx response w/o block-ack\n"); agg->frame_count = tx_resp->frame_count; agg->start_idx = start_idx; agg->rate_n_flags = rate_n_flags; agg->bitmap = 0; /* num frames attempted by Tx command */ if (agg->frame_count == 1) { /* Only one frame was attempted; no block-ack will arrive */ status = le16_to_cpu(frame_status[0].status); idx = start_idx; D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n", agg->frame_count, agg->start_idx, idx); info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]); info->status.rates[0].count = tx_resp->failure_frame + 1; info->flags &= ~IEEE80211_TX_CTL_AMPDU; info->flags |= il4965_tx_status_to_mac80211(status); il4965_hwrate_to_tx_control(il, rate_n_flags, info); D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff, tx_resp->failure_frame); D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags); agg->wait_for_ba = 0; } else { /* Two or more frames were attempted; expect block-ack */ u64 bitmap = 0; int start = agg->start_idx; struct sk_buff *skb; /* Construct bit-map of pending frames within Tx win */ for (i = 0; i < agg->frame_count; i++) { u16 sc; status = le16_to_cpu(frame_status[i].status); seq = le16_to_cpu(frame_status[i].sequence); idx = SEQ_TO_IDX(seq); txq_id = SEQ_TO_QUEUE(seq); if (status & (AGG_TX_STATE_FEW_BYTES_MSK | AGG_TX_STATE_ABORT_MSK)) continue; D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n", agg->frame_count, txq_id, idx); skb = il->txq[txq_id].skbs[idx]; if (WARN_ON_ONCE(skb == NULL)) return -1; hdr = (struct ieee80211_hdr *) skb->data; sc = le16_to_cpu(hdr->seq_ctrl); if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) { IL_ERR("BUG_ON idx doesn't match seq control" " idx=%d, seq_idx=%d, seq=%d\n", idx, IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl); return -1; } D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx, IEEE80211_SEQ_TO_SN(sc)); sh = idx - start; if (sh > 64) { sh = (start - idx) + 0xff; bitmap = bitmap << sh; sh = 0; start = idx; } else if (sh < -64) sh = 0xff - (start - idx); else if (sh < 0) { sh = start - idx; start = idx; bitmap = bitmap << sh; sh = 0; } bitmap |= 1ULL << sh; D_TX_REPLY("start=%d bitmap=0x%llx\n", start, (unsigned long long)bitmap); } agg->bitmap = bitmap; agg->start_idx = start; D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n", agg->frame_count, agg->start_idx, (unsigned long long)agg->bitmap); if (bitmap) agg->wait_for_ba = 1; } return 0; } /* * il4965_hdl_tx - Handle standard (non-aggregation) Tx response */ static void il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); u16 sequence = le16_to_cpu(pkt->hdr.sequence); int txq_id = SEQ_TO_QUEUE(sequence); int idx = SEQ_TO_IDX(sequence); struct il_tx_queue *txq = &il->txq[txq_id]; struct sk_buff *skb; struct ieee80211_hdr *hdr; struct ieee80211_tx_info *info; struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; u32 status = le32_to_cpu(tx_resp->u.status); int tid; int sta_id; int freed; u8 *qc = NULL; unsigned long flags; if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) { IL_ERR("Read idx for DMA queue txq_id (%d) idx %d " "is out of range [0-%d] %d %d\n", txq_id, idx, txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr); return; } txq->time_stamp = jiffies; skb = txq->skbs[txq->q.read_ptr]; info = IEEE80211_SKB_CB(skb); memset(&info->status, 0, sizeof(info->status)); hdr = (struct ieee80211_hdr *) skb->data; if (ieee80211_is_data_qos(hdr->frame_control)) { qc = ieee80211_get_qos_ctl(hdr); tid = qc[0] & 0xf; } sta_id = il4965_get_ra_sta_id(il, hdr); if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) { IL_ERR("Station not known\n"); return; } /* * Firmware will not transmit frame on passive channel, if it not yet * received some valid frame on that channel. When this error happen * we have to wait until firmware will unblock itself i.e. when we * note received beacon or other frame. We unblock queues in * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed. */ if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) && il->iw_mode == NL80211_IFTYPE_STATION) { il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE); D_INFO("Stopped queues - RX waiting on passive channel\n"); } spin_lock_irqsave(&il->sta_lock, flags); if (txq->sched_retry) { const u32 scd_ssn = il4965_get_scd_ssn(tx_resp); struct il_ht_agg *agg; if (WARN_ON(!qc)) goto out; agg = &il->stations[sta_id].tid[tid].agg; il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx); /* check if BAR is needed */ if (tx_resp->frame_count == 1 && !il4965_is_tx_success(status)) info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; if (txq->q.read_ptr != (scd_ssn & 0xff)) { idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd); D_TX_REPLY("Retry scheduler reclaim scd_ssn " "%d idx %d\n", scd_ssn, idx); freed = il4965_tx_queue_reclaim(il, txq_id, idx); il4965_free_tfds_in_queue(il, sta_id, tid, freed); if (il->mac80211_registered && il_queue_space(&txq->q) > txq->q.low_mark && agg->state != IL_EMPTYING_HW_QUEUE_DELBA) il_wake_queue(il, txq); } } else { info->status.rates[0].count = tx_resp->failure_frame + 1; info->flags |= il4965_tx_status_to_mac80211(status); il4965_hwrate_to_tx_control(il, le32_to_cpu(tx_resp->rate_n_flags), info); D_TX_REPLY("TXQ %d status %s (0x%08x) " "rate_n_flags 0x%x retries %d\n", txq_id, il4965_get_tx_fail_reason(status), status, le32_to_cpu(tx_resp->rate_n_flags), tx_resp->failure_frame); freed = il4965_tx_queue_reclaim(il, txq_id, idx); if (qc && likely(sta_id != IL_INVALID_STATION)) il4965_free_tfds_in_queue(il, sta_id, tid, freed); else if (sta_id == IL_INVALID_STATION) D_TX_REPLY("Station not known\n"); if (il->mac80211_registered && il_queue_space(&txq->q) > txq->q.low_mark) il_wake_queue(il, txq); } out: if (qc && likely(sta_id != IL_INVALID_STATION)) il4965_txq_check_empty(il, sta_id, tid, txq_id); il4965_check_abort_status(il, tx_resp->frame_count, status); spin_unlock_irqrestore(&il->sta_lock, flags); } /* * translate ucode response to mac80211 tx status control values */ void il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags, struct ieee80211_tx_info *info) { struct ieee80211_tx_rate *r = &info->status.rates[0]; info->status.antenna = ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); if (rate_n_flags & RATE_MCS_HT_MSK) r->flags |= IEEE80211_TX_RC_MCS; if (rate_n_flags & RATE_MCS_GF_MSK) r->flags |= IEEE80211_TX_RC_GREEN_FIELD; if (rate_n_flags & RATE_MCS_HT40_MSK) r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; if (rate_n_flags & RATE_MCS_DUP_MSK) r->flags |= IEEE80211_TX_RC_DUP_DATA; if (rate_n_flags & RATE_MCS_SGI_MSK) r->flags |= IEEE80211_TX_RC_SHORT_GI; r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band); } /* * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA * * Handles block-acknowledge notification from device, which reports success * of frames sent via aggregation. */ static void il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; struct il_tx_queue *txq = NULL; struct il_ht_agg *agg; int idx; int sta_id; int tid; unsigned long flags; /* "flow" corresponds to Tx queue */ u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); /* "ssn" is start of block-ack Tx win, corresponds to idx * (in Tx queue's circular buffer) of first TFD/frame in win */ u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); if (scd_flow >= il->hw_params.max_txq_num) { IL_ERR("BUG_ON scd_flow is bigger than number of queues\n"); return; } txq = &il->txq[scd_flow]; sta_id = ba_resp->sta_id; tid = ba_resp->tid; agg = &il->stations[sta_id].tid[tid].agg; if (unlikely(agg->txq_id != scd_flow)) { /* * FIXME: this is a uCode bug which need to be addressed, * log the information and return for now! * since it is possible happen very often and in order * not to fill the syslog, don't enable the logging by default */ D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n", scd_flow, agg->txq_id); return; } /* Find idx just before block-ack win */ idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); spin_lock_irqsave(&il->sta_lock, flags); D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n", agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32, ba_resp->sta_id); D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = " "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl, (unsigned long long)le64_to_cpu(ba_resp->bitmap), ba_resp->scd_flow, ba_resp->scd_ssn); D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx, (unsigned long long)agg->bitmap); /* Update driver's record of ACK vs. not for each frame in win */ il4965_tx_status_reply_compressed_ba(il, agg, ba_resp); /* Release all TFDs before the SSN, i.e. all TFDs in front of * block-ack win (we assume that they've been successfully * transmitted ... if not, it's too late anyway). */ if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) { /* calculate mac80211 ampdu sw queue to wake */ int freed = il4965_tx_queue_reclaim(il, scd_flow, idx); il4965_free_tfds_in_queue(il, sta_id, tid, freed); if (il_queue_space(&txq->q) > txq->q.low_mark && il->mac80211_registered && agg->state != IL_EMPTYING_HW_QUEUE_DELBA) il_wake_queue(il, txq); il4965_txq_check_empty(il, sta_id, tid, scd_flow); } spin_unlock_irqrestore(&il->sta_lock, flags); } #ifdef CONFIG_IWLEGACY_DEBUG const char * il4965_get_tx_fail_reason(u32 status) { #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x switch (status & TX_STATUS_MSK) { case TX_STATUS_SUCCESS: return "SUCCESS"; TX_STATUS_POSTPONE(DELAY); TX_STATUS_POSTPONE(FEW_BYTES); TX_STATUS_POSTPONE(QUIET_PERIOD); TX_STATUS_POSTPONE(CALC_TTAK); TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); TX_STATUS_FAIL(SHORT_LIMIT); TX_STATUS_FAIL(LONG_LIMIT); TX_STATUS_FAIL(FIFO_UNDERRUN); TX_STATUS_FAIL(DRAIN_FLOW); TX_STATUS_FAIL(RFKILL_FLUSH); TX_STATUS_FAIL(LIFE_EXPIRE); TX_STATUS_FAIL(DEST_PS); TX_STATUS_FAIL(HOST_ABORTED); TX_STATUS_FAIL(BT_RETRY); TX_STATUS_FAIL(STA_INVALID); TX_STATUS_FAIL(FRAG_DROPPED); TX_STATUS_FAIL(TID_DISABLE); TX_STATUS_FAIL(FIFO_FLUSHED); TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); TX_STATUS_FAIL(PASSIVE_NO_RX); TX_STATUS_FAIL(NO_BEACON_ON_RADAR); } return "UNKNOWN"; #undef TX_STATUS_FAIL #undef TX_STATUS_POSTPONE } #endif /* CONFIG_IWLEGACY_DEBUG */ static struct il_link_quality_cmd * il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id) { int i, r; struct il_link_quality_cmd *link_cmd; u32 rate_flags = 0; __le32 rate_n_flags; link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL); if (!link_cmd) { IL_ERR("Unable to allocate memory for LQ cmd.\n"); return NULL; } /* Set up the rate scaling to start at selected rate, fall back * all the way down to 1M in IEEE order, and then spin on 1M */ if (il->band == NL80211_BAND_5GHZ) r = RATE_6M_IDX; else r = RATE_1M_IDX; if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE) rate_flags |= RATE_MCS_CCK_MSK; rate_flags |= il4965_first_antenna(il->hw_params. valid_tx_ant) << RATE_MCS_ANT_POS; rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags); for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) link_cmd->rs_table[i].rate_n_flags = rate_n_flags; link_cmd->general_params.single_stream_ant_msk = il4965_first_antenna(il->hw_params.valid_tx_ant); link_cmd->general_params.dual_stream_ant_msk = il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params. valid_tx_ant); if (!link_cmd->general_params.dual_stream_ant_msk) { link_cmd->general_params.dual_stream_ant_msk = ANT_AB; } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) { link_cmd->general_params.dual_stream_ant_msk = il->hw_params.valid_tx_ant; } link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; link_cmd->agg_params.agg_time_limit = cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); link_cmd->sta_id = sta_id; return link_cmd; } /* * il4965_add_bssid_station - Add the special IBSS BSSID station * * Function sleeps. */ int il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r) { int ret; u8 sta_id; struct il_link_quality_cmd *link_cmd; unsigned long flags; if (sta_id_r) *sta_id_r = IL_INVALID_STATION; ret = il_add_station_common(il, addr, 0, NULL, &sta_id); if (ret) { IL_ERR("Unable to add station %pM\n", addr); return ret; } if (sta_id_r) *sta_id_r = sta_id; spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].used |= IL_STA_LOCAL; spin_unlock_irqrestore(&il->sta_lock, flags); /* Set up default rate scaling table in device's station table */ link_cmd = il4965_sta_alloc_lq(il, sta_id); if (!link_cmd) { IL_ERR("Unable to initialize rate scaling for station %pM.\n", addr); return -ENOMEM; } ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true); if (ret) IL_ERR("Link quality command failed (%d)\n", ret); spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].lq = link_cmd; spin_unlock_irqrestore(&il->sta_lock, flags); return 0; } static int il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty) { int i; u8 buff[sizeof(struct il_wep_cmd) + sizeof(struct il_wep_key) * WEP_KEYS_MAX]; struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff; size_t cmd_size = sizeof(struct il_wep_cmd); struct il_host_cmd cmd = { .id = C_WEPKEY, .data = wep_cmd, .flags = CMD_SYNC, }; bool not_empty = false; might_sleep(); memset(wep_cmd, 0, cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX)); for (i = 0; i < WEP_KEYS_MAX; i++) { u8 key_size = il->_4965.wep_keys[i].key_size; wep_cmd->key[i].key_idx = i; if (key_size) { wep_cmd->key[i].key_offset = i; not_empty = true; } else wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET; wep_cmd->key[i].key_size = key_size; memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size); } wep_cmd->global_key_type = WEP_KEY_WEP_TYPE; wep_cmd->num_keys = WEP_KEYS_MAX; cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX; cmd.len = cmd_size; if (not_empty || send_if_empty) return il_send_cmd(il, &cmd); else return 0; } int il4965_restore_default_wep_keys(struct il_priv *il) { lockdep_assert_held(&il->mutex); return il4965_static_wepkey_cmd(il, false); } int il4965_remove_default_wep_key(struct il_priv *il, struct ieee80211_key_conf *keyconf) { int ret; int idx = keyconf->keyidx; lockdep_assert_held(&il->mutex); D_WEP("Removing default WEP key: idx=%d\n", idx); memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key)); if (il_is_rfkill(il)) { D_WEP("Not sending C_WEPKEY command due to RFKILL.\n"); /* but keys in device are clear anyway so return success */ return 0; } ret = il4965_static_wepkey_cmd(il, 1); D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret); return ret; } int il4965_set_default_wep_key(struct il_priv *il, struct ieee80211_key_conf *keyconf) { int ret; int len = keyconf->keylen; int idx = keyconf->keyidx; lockdep_assert_held(&il->mutex); if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) { D_WEP("Bad WEP key length %d\n", keyconf->keylen); return -EINVAL; } keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; keyconf->hw_key_idx = HW_KEY_DEFAULT; il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher; il->_4965.wep_keys[idx].key_size = len; memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len); ret = il4965_static_wepkey_cmd(il, false); D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret); return ret; } static int il4965_set_wep_dynamic_key_info(struct il_priv *il, struct ieee80211_key_conf *keyconf, u8 sta_id) { unsigned long flags; __le16 key_flags = 0; struct il_addsta_cmd sta_cmd; lockdep_assert_held(&il->mutex); keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK); key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); key_flags &= ~STA_KEY_FLG_INVALID; if (keyconf->keylen == WEP_KEY_LEN_128) key_flags |= STA_KEY_FLG_KEY_SIZE_MSK; if (sta_id == il->hw_params.bcast_id) key_flags |= STA_KEY_MULTICAST_MSK; spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].keyinfo.cipher = keyconf->cipher; il->stations[sta_id].keyinfo.keylen = keyconf->keylen; il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx; memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key, keyconf->keylen); if ((il->stations[sta_id].sta.key. key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) il->stations[sta_id].sta.key.key_offset = il_get_free_ucode_key_idx(il); /* else, we are overriding an existing key => no need to allocated room * in uCode. */ WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, "no space for a new key"); il->stations[sta_id].sta.key.key_flags = key_flags; il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; memcpy(&sta_cmd, &il->stations[sta_id].sta, sizeof(struct il_addsta_cmd)); spin_unlock_irqrestore(&il->sta_lock, flags); return il_send_add_sta(il, &sta_cmd, CMD_SYNC); } static int il4965_set_ccmp_dynamic_key_info(struct il_priv *il, struct ieee80211_key_conf *keyconf, u8 sta_id) { unsigned long flags; __le16 key_flags = 0; struct il_addsta_cmd sta_cmd; lockdep_assert_held(&il->mutex); key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK); key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); key_flags &= ~STA_KEY_FLG_INVALID; if (sta_id == il->hw_params.bcast_id) key_flags |= STA_KEY_MULTICAST_MSK; keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].keyinfo.cipher = keyconf->cipher; il->stations[sta_id].keyinfo.keylen = keyconf->keylen; memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen); if ((il->stations[sta_id].sta.key. key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) il->stations[sta_id].sta.key.key_offset = il_get_free_ucode_key_idx(il); /* else, we are overriding an existing key => no need to allocated room * in uCode. */ WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, "no space for a new key"); il->stations[sta_id].sta.key.key_flags = key_flags; il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; memcpy(&sta_cmd, &il->stations[sta_id].sta, sizeof(struct il_addsta_cmd)); spin_unlock_irqrestore(&il->sta_lock, flags); return il_send_add_sta(il, &sta_cmd, CMD_SYNC); } static int il4965_set_tkip_dynamic_key_info(struct il_priv *il, struct ieee80211_key_conf *keyconf, u8 sta_id) { unsigned long flags; __le16 key_flags = 0; key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK); key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); key_flags &= ~STA_KEY_FLG_INVALID; if (sta_id == il->hw_params.bcast_id) key_flags |= STA_KEY_MULTICAST_MSK; keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].keyinfo.cipher = keyconf->cipher; il->stations[sta_id].keyinfo.keylen = 16; if ((il->stations[sta_id].sta.key. key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) il->stations[sta_id].sta.key.key_offset = il_get_free_ucode_key_idx(il); /* else, we are overriding an existing key => no need to allocated room * in uCode. */ WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, "no space for a new key"); il->stations[sta_id].sta.key.key_flags = key_flags; /* This copy is acutally not needed: we get the key with each TX */ memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16); memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16); spin_unlock_irqrestore(&il->sta_lock, flags); return 0; } void il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) { u8 sta_id; unsigned long flags; int i; if (il_scan_cancel(il)) { /* cancel scan failed, just live w/ bad key and rely briefly on SW decryption */ return; } sta_id = il_sta_id_or_broadcast(il, sta); if (sta_id == IL_INVALID_STATION) return; spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32; for (i = 0; i < 5; i++) il->stations[sta_id].sta.key.tkip_rx_ttak[i] = cpu_to_le16(phase1key[i]); il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); spin_unlock_irqrestore(&il->sta_lock, flags); } int il4965_remove_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, u8 sta_id) { unsigned long flags; u16 key_flags; u8 keyidx; struct il_addsta_cmd sta_cmd; lockdep_assert_held(&il->mutex); il->_4965.key_mapping_keys--; spin_lock_irqsave(&il->sta_lock, flags); key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags); keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3; D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id); if (keyconf->keyidx != keyidx) { /* We need to remove a key with idx different that the one * in the uCode. This means that the key we need to remove has * been replaced by another one with different idx. * Don't do anything and return ok */ spin_unlock_irqrestore(&il->sta_lock, flags); return 0; } if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) { IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx, key_flags); spin_unlock_irqrestore(&il->sta_lock, flags); return 0; } if (!test_and_clear_bit (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table)) IL_ERR("idx %d not used in uCode key table.\n", il->stations[sta_id].sta.key.key_offset); memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key)); memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo)); il->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID; il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx; il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; if (il_is_rfkill(il)) { D_WEP ("Not sending C_ADD_STA command because RFKILL enabled.\n"); spin_unlock_irqrestore(&il->sta_lock, flags); return 0; } memcpy(&sta_cmd, &il->stations[sta_id].sta, sizeof(struct il_addsta_cmd)); spin_unlock_irqrestore(&il->sta_lock, flags); return il_send_add_sta(il, &sta_cmd, CMD_SYNC); } int il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, u8 sta_id) { int ret; lockdep_assert_held(&il->mutex); il->_4965.key_mapping_keys++; keyconf->hw_key_idx = HW_KEY_DYNAMIC; switch (keyconf->cipher) { case WLAN_CIPHER_SUITE_CCMP: ret = il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id); break; case WLAN_CIPHER_SUITE_TKIP: ret = il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id); break; case WLAN_CIPHER_SUITE_WEP40: case WLAN_CIPHER_SUITE_WEP104: ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id); break; default: IL_ERR("Unknown alg: %s cipher = %x\n", __func__, keyconf->cipher); ret = -EINVAL; } D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n", keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret); return ret; } /* * il4965_alloc_bcast_station - add broadcast station into driver's station table. * * This adds the broadcast station into the driver's station table * and marks it driver active, so that it will be restored to the * device at the next best time. */ int il4965_alloc_bcast_station(struct il_priv *il) { struct il_link_quality_cmd *link_cmd; unsigned long flags; u8 sta_id; spin_lock_irqsave(&il->sta_lock, flags); sta_id = il_prep_station(il, il_bcast_addr, false, NULL); if (sta_id == IL_INVALID_STATION) { IL_ERR("Unable to prepare broadcast station\n"); spin_unlock_irqrestore(&il->sta_lock, flags); return -EINVAL; } il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE; il->stations[sta_id].used |= IL_STA_BCAST; spin_unlock_irqrestore(&il->sta_lock, flags); link_cmd = il4965_sta_alloc_lq(il, sta_id); if (!link_cmd) { IL_ERR ("Unable to initialize rate scaling for bcast station.\n"); return -ENOMEM; } spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].lq = link_cmd; spin_unlock_irqrestore(&il->sta_lock, flags); return 0; } /* * il4965_update_bcast_station - update broadcast station's LQ command * * Only used by iwl4965. Placed here to have all bcast station management * code together. */ static int il4965_update_bcast_station(struct il_priv *il) { unsigned long flags; struct il_link_quality_cmd *link_cmd; u8 sta_id = il->hw_params.bcast_id; link_cmd = il4965_sta_alloc_lq(il, sta_id); if (!link_cmd) { IL_ERR("Unable to initialize rate scaling for bcast sta.\n"); return -ENOMEM; } spin_lock_irqsave(&il->sta_lock, flags); if (il->stations[sta_id].lq) kfree(il->stations[sta_id].lq); else D_INFO("Bcast sta rate scaling has not been initialized.\n"); il->stations[sta_id].lq = link_cmd; spin_unlock_irqrestore(&il->sta_lock, flags); return 0; } int il4965_update_bcast_stations(struct il_priv *il) { return il4965_update_bcast_station(il); } /* * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table */ int il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid) { unsigned long flags; struct il_addsta_cmd sta_cmd; lockdep_assert_held(&il->mutex); /* Remove "disable" flag, to enable Tx for this TID */ spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; memcpy(&sta_cmd, &il->stations[sta_id].sta, sizeof(struct il_addsta_cmd)); spin_unlock_irqrestore(&il->sta_lock, flags); return il_send_add_sta(il, &sta_cmd, CMD_SYNC); } int il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid, u16 ssn) { unsigned long flags; int sta_id; struct il_addsta_cmd sta_cmd; lockdep_assert_held(&il->mutex); sta_id = il_sta_id(sta); if (sta_id == IL_INVALID_STATION) return -ENXIO; spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].sta.station_flags_msk = 0; il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid; il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; memcpy(&sta_cmd, &il->stations[sta_id].sta, sizeof(struct il_addsta_cmd)); spin_unlock_irqrestore(&il->sta_lock, flags); return il_send_add_sta(il, &sta_cmd, CMD_SYNC); } int il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid) { unsigned long flags; int sta_id; struct il_addsta_cmd sta_cmd; lockdep_assert_held(&il->mutex); sta_id = il_sta_id(sta); if (sta_id == IL_INVALID_STATION) { IL_ERR("Invalid station for AGG tid %d\n", tid); return -ENXIO; } spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].sta.station_flags_msk = 0; il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid; il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; memcpy(&sta_cmd, &il->stations[sta_id].sta, sizeof(struct il_addsta_cmd)); spin_unlock_irqrestore(&il->sta_lock, flags); return il_send_add_sta(il, &sta_cmd, CMD_SYNC); } void il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt) { unsigned long flags; spin_lock_irqsave(&il->sta_lock, flags); il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK; il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK; il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK; il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt); il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); spin_unlock_irqrestore(&il->sta_lock, flags); } void il4965_update_chain_flags(struct il_priv *il) { if (il->ops->set_rxon_chain) { il->ops->set_rxon_chain(il); if (il->active.rx_chain != il->staging.rx_chain) il_commit_rxon(il); } } static void il4965_clear_free_frames(struct il_priv *il) { struct list_head *element; D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count); while (!list_empty(&il->free_frames)) { element = il->free_frames.next; list_del(element); kfree(list_entry(element, struct il_frame, list)); il->frames_count--; } if (il->frames_count) { IL_WARN("%d frames still in use. Did we lose one?\n", il->frames_count); il->frames_count = 0; } } static struct il_frame * il4965_get_free_frame(struct il_priv *il) { struct il_frame *frame; struct list_head *element; if (list_empty(&il->free_frames)) { frame = kzalloc(sizeof(*frame), GFP_KERNEL); if (!frame) { IL_ERR("Could not allocate frame!\n"); return NULL; } il->frames_count++; return frame; } element = il->free_frames.next; list_del(element); return list_entry(element, struct il_frame, list); } static void il4965_free_frame(struct il_priv *il, struct il_frame *frame) { memset(frame, 0, sizeof(*frame)); list_add(&frame->list, &il->free_frames); } static u32 il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr, int left) { lockdep_assert_held(&il->mutex); if (!il->beacon_skb) return 0; if (il->beacon_skb->len > left) return 0; memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len); return il->beacon_skb->len; } /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */ static void il4965_set_beacon_tim(struct il_priv *il, struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon, u32 frame_size) { u16 tim_idx; struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; /* * The idx is relative to frame start but we start looking at the * variable-length part of the beacon. */ tim_idx = mgmt->u.beacon.variable - beacon; /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ while ((tim_idx < (frame_size - 2)) && (beacon[tim_idx] != WLAN_EID_TIM)) tim_idx += beacon[tim_idx + 1] + 2; /* If TIM field was found, set variables */ if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx); tx_beacon_cmd->tim_size = beacon[tim_idx + 1]; } else IL_WARN("Unable to find TIM Element in beacon\n"); } static unsigned int il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame) { struct il_tx_beacon_cmd *tx_beacon_cmd; u32 frame_size; u32 rate_flags; u32 rate; /* * We have to set up the TX command, the TX Beacon command, and the * beacon contents. */ lockdep_assert_held(&il->mutex); if (!il->beacon_enabled) { IL_ERR("Trying to build beacon without beaconing enabled\n"); return 0; } /* Initialize memory */ tx_beacon_cmd = &frame->u.beacon; memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); /* Set up TX beacon contents */ frame_size = il4965_fill_beacon_frame(il, tx_beacon_cmd->frame, sizeof(frame->u) - sizeof(*tx_beacon_cmd)); if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE)) return 0; if (!frame_size) return 0; /* Set up TX command fields */ tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size); tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id; tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK; /* Set up TX beacon command fields */ il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame, frame_size); /* Set up packet rate and flags */ rate = il_get_lowest_plcp(il); il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE)) rate_flags |= RATE_MCS_CCK_MSK; tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags); return sizeof(*tx_beacon_cmd) + frame_size; } int il4965_send_beacon_cmd(struct il_priv *il) { struct il_frame *frame; unsigned int frame_size; int rc; frame = il4965_get_free_frame(il); if (!frame) { IL_ERR("Could not obtain free frame buffer for beacon " "command.\n"); return -ENOMEM; } frame_size = il4965_hw_get_beacon_cmd(il, frame); if (!frame_size) { IL_ERR("Error configuring the beacon command\n"); il4965_free_frame(il, frame); return -EINVAL; } rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]); il4965_free_frame(il, frame); return rc; } static inline dma_addr_t il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx) { struct il_tfd_tb *tb = &tfd->tbs[idx]; dma_addr_t addr = get_unaligned_le32(&tb->lo); if (sizeof(dma_addr_t) > sizeof(u32)) addr |= ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16; return addr; } static inline u16 il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx) { struct il_tfd_tb *tb = &tfd->tbs[idx]; return le16_to_cpu(tb->hi_n_len) >> 4; } static inline void il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len) { struct il_tfd_tb *tb = &tfd->tbs[idx]; u16 hi_n_len = len << 4; put_unaligned_le32(addr, &tb->lo); if (sizeof(dma_addr_t) > sizeof(u32)) hi_n_len |= ((addr >> 16) >> 16) & 0xF; tb->hi_n_len = cpu_to_le16(hi_n_len); tfd->num_tbs = idx + 1; } static inline u8 il4965_tfd_get_num_tbs(struct il_tfd *tfd) { return tfd->num_tbs & 0x1f; } /* * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] * * Does NOT advance any TFD circular buffer read/write idxes * Does NOT free the TFD itself (which is within circular buffer) */ void il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq) { struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds; struct il_tfd *tfd; struct pci_dev *dev = il->pci_dev; int idx = txq->q.read_ptr; int i; int num_tbs; tfd = &tfd_tmp[idx]; /* Sanity check on number of chunks */ num_tbs = il4965_tfd_get_num_tbs(tfd); if (num_tbs >= IL_NUM_OF_TBS) { IL_ERR("Too many chunks: %i\n", num_tbs); /* @todo issue fatal error, it is quite serious situation */ return; } /* Unmap tx_cmd */ if (num_tbs) dma_unmap_single(&dev->dev, dma_unmap_addr(&txq->meta[idx], mapping), dma_unmap_len(&txq->meta[idx], len), DMA_BIDIRECTIONAL); /* Unmap chunks, if any. */ for (i = 1; i < num_tbs; i++) dma_unmap_single(&dev->dev, il4965_tfd_tb_get_addr(tfd, i), il4965_tfd_tb_get_len(tfd, i), DMA_TO_DEVICE); /* free SKB */ if (txq->skbs) { struct sk_buff *skb = txq->skbs[txq->q.read_ptr]; /* can be called from irqs-disabled context */ if (skb) { dev_kfree_skb_any(skb); txq->skbs[txq->q.read_ptr] = NULL; } } } int il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq, dma_addr_t addr, u16 len, u8 reset, u8 pad) { struct il_queue *q; struct il_tfd *tfd, *tfd_tmp; u32 num_tbs; q = &txq->q; tfd_tmp = (struct il_tfd *)txq->tfds; tfd = &tfd_tmp[q->write_ptr]; if (reset) memset(tfd, 0, sizeof(*tfd)); num_tbs = il4965_tfd_get_num_tbs(tfd); /* Each TFD can point to a maximum 20 Tx buffers */ if (num_tbs >= IL_NUM_OF_TBS) { IL_ERR("Error can not send more than %d chunks\n", IL_NUM_OF_TBS); return -EINVAL; } BUG_ON(addr & ~DMA_BIT_MASK(36)); if (unlikely(addr & ~IL_TX_DMA_MASK)) IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr); il4965_tfd_set_tb(tfd, num_tbs, addr, len); return 0; } /* * Tell nic where to find circular buffer of Tx Frame Descriptors for * given Tx queue, and enable the DMA channel used for that queue. * * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA * channels supported in hardware. */ int il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq) { int txq_id = txq->q.id; /* Circular buffer (TFD queue in DRAM) physical base address */ il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8); return 0; } /****************************************************************************** * * Generic RX handler implementations * ******************************************************************************/ static void il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); struct il_alive_resp *palive; struct delayed_work *pwork; palive = &pkt->u.alive_frame; D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n", palive->is_valid, palive->ver_type, palive->ver_subtype); if (palive->ver_subtype == INITIALIZE_SUBTYPE) { D_INFO("Initialization Alive received.\n"); memcpy(&il->card_alive_init, &pkt->u.alive_frame, sizeof(struct il_init_alive_resp)); pwork = &il->init_alive_start; } else { D_INFO("Runtime Alive received.\n"); memcpy(&il->card_alive, &pkt->u.alive_frame, sizeof(struct il_alive_resp)); pwork = &il->alive_start; } /* We delay the ALIVE response by 5ms to * give the HW RF Kill time to activate... */ if (palive->is_valid == UCODE_VALID_OK) queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5)); else IL_WARN("uCode did not respond OK.\n"); } /* * il4965_bg_stats_periodic - Timer callback to queue stats * * This callback is provided in order to send a stats request. * * This timer function is continually reset to execute within * 60 seconds since the last N_STATS was received. We need to * ensure we receive the stats in order to update the temperature * used for calibrating the TXPOWER. */ static void il4965_bg_stats_periodic(struct timer_list *t) { struct il_priv *il = from_timer(il, t, stats_periodic); if (test_bit(S_EXIT_PENDING, &il->status)) return; /* dont send host command if rf-kill is on */ if (!il_is_ready_rf(il)) return; il_send_stats_request(il, CMD_ASYNC, false); } static void il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); struct il4965_beacon_notif *beacon = (struct il4965_beacon_notif *)pkt->u.raw; #ifdef CONFIG_IWLEGACY_DEBUG u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n", le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK, beacon->beacon_notify_hdr.failure_frame, le32_to_cpu(beacon->ibss_mgr_status), le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate); #endif il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); } static void il4965_perform_ct_kill_task(struct il_priv *il) { unsigned long flags; D_POWER("Stop all queues\n"); if (il->mac80211_registered) ieee80211_stop_queues(il->hw); _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); _il_rd(il, CSR_UCODE_DRV_GP1); spin_lock_irqsave(&il->reg_lock, flags); if (likely(_il_grab_nic_access(il))) _il_release_nic_access(il); spin_unlock_irqrestore(&il->reg_lock, flags); } /* Handle notification from uCode that card's power state is changing * due to software, hardware, or critical temperature RFKILL */ static void il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); unsigned long status = il->status; D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n", (flags & HW_CARD_DISABLED) ? "Kill" : "On", (flags & SW_CARD_DISABLED) ? "Kill" : "On", (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached"); if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) { _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); if (!(flags & RXON_CARD_DISABLED)) { _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); } } if (flags & CT_CARD_DISABLED) il4965_perform_ct_kill_task(il); if (flags & HW_CARD_DISABLED) set_bit(S_RFKILL, &il->status); else clear_bit(S_RFKILL, &il->status); if (!(flags & RXON_CARD_DISABLED)) il_scan_cancel(il); if ((test_bit(S_RFKILL, &status) != test_bit(S_RFKILL, &il->status))) wiphy_rfkill_set_hw_state(il->hw->wiphy, test_bit(S_RFKILL, &il->status)); else wake_up(&il->wait_command_queue); } /* * il4965_setup_handlers - Initialize Rx handler callbacks * * Setup the RX handlers for each of the reply types sent from the uCode * to the host. * * This function chains into the hardware specific files for them to setup * any hardware specific handlers as well. */ static void il4965_setup_handlers(struct il_priv *il) { il->handlers[N_ALIVE] = il4965_hdl_alive; il->handlers[N_ERROR] = il_hdl_error; il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa; il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement; il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep; il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats; il->handlers[N_BEACON] = il4965_hdl_beacon; /* * The same handler is used for both the REPLY to a discrete * stats request from the host as well as for the periodic * stats notifications (after received beacons) from the uCode. */ il->handlers[C_STATS] = il4965_hdl_c_stats; il->handlers[N_STATS] = il4965_hdl_stats; il_setup_rx_scan_handlers(il); /* status change handler */ il->handlers[N_CARD_STATE] = il4965_hdl_card_state; il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon; /* Rx handlers */ il->handlers[N_RX_PHY] = il4965_hdl_rx_phy; il->handlers[N_RX_MPDU] = il4965_hdl_rx; il->handlers[N_RX] = il4965_hdl_rx; /* block ack */ il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba; /* Tx response */ il->handlers[C_TX] = il4965_hdl_tx; } /* * il4965_rx_handle - Main entry function for receiving responses from uCode * * Uses the il->handlers callback function array to invoke * the appropriate handlers, including command responses, * frame-received notifications, and other notifications. */ void il4965_rx_handle(struct il_priv *il) { struct il_rx_buf *rxb; struct il_rx_pkt *pkt; struct il_rx_queue *rxq = &il->rxq; u32 r, i; int reclaim; unsigned long flags; u8 fill_rx = 0; u32 count = 8; int total_empty; /* uCode's read idx (stored in shared DRAM) indicates the last Rx * buffer that the driver may process (last buffer filled by ucode). */ r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; i = rxq->read; /* Rx interrupt, but nothing sent from uCode */ if (i == r) D_RX("r = %d, i = %d\n", r, i); /* calculate total frames need to be restock after handling RX */ total_empty = r - rxq->write_actual; if (total_empty < 0) total_empty += RX_QUEUE_SIZE; if (total_empty > (RX_QUEUE_SIZE / 2)) fill_rx = 1; while (i != r) { int len; rxb = rxq->queue[i]; /* If an RXB doesn't have a Rx queue slot associated with it, * then a bug has been introduced in the queue refilling * routines -- catch it here */ BUG_ON(rxb == NULL); rxq->queue[i] = NULL; dma_unmap_page(&il->pci_dev->dev, rxb->page_dma, PAGE_SIZE << il->hw_params.rx_page_order, DMA_FROM_DEVICE); pkt = rxb_addr(rxb); len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK; len += sizeof(u32); /* account for status word */ reclaim = il_need_reclaim(il, pkt); /* Based on type of command response or notification, * handle those that need handling via function in * handlers table. See il4965_setup_handlers() */ if (il->handlers[pkt->hdr.cmd]) { D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); il->isr_stats.handlers[pkt->hdr.cmd]++; il->handlers[pkt->hdr.cmd] (il, rxb); } else { /* No handling needed */ D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r, i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); } /* * XXX: After here, we should always check rxb->page * against NULL before touching it or its virtual * memory (pkt). Because some handler might have * already taken or freed the pages. */ if (reclaim) { /* Invoke any callbacks, transfer the buffer to caller, * and fire off the (possibly) blocking il_send_cmd() * as we reclaim the driver command queue */ if (rxb->page) il_tx_cmd_complete(il, rxb); else IL_WARN("Claim null rxb?\n"); } /* Reuse the page if possible. For notification packets and * SKBs that fail to Rx correctly, add them back into the * rx_free list for reuse later. */ spin_lock_irqsave(&rxq->lock, flags); if (rxb->page != NULL) { rxb->page_dma = dma_map_page(&il->pci_dev->dev, rxb->page, 0, PAGE_SIZE << il->hw_params.rx_page_order, DMA_FROM_DEVICE); if (unlikely(dma_mapping_error(&il->pci_dev->dev, rxb->page_dma))) { __il_free_pages(il, rxb->page); rxb->page = NULL; list_add_tail(&rxb->list, &rxq->rx_used); } else { list_add_tail(&rxb->list, &rxq->rx_free); rxq->free_count++; } } else list_add_tail(&rxb->list, &rxq->rx_used); spin_unlock_irqrestore(&rxq->lock, flags); i = (i + 1) & RX_QUEUE_MASK; /* If there are a lot of unused frames, * restock the Rx queue so ucode wont assert. */ if (fill_rx) { count++; if (count >= 8) { rxq->read = i; il4965_rx_replenish_now(il); count = 0; } } } /* Backtrack one entry */ rxq->read = i; if (fill_rx) il4965_rx_replenish_now(il); else il4965_rx_queue_restock(il); } /* call this function to flush any scheduled tasklet */ static inline void il4965_synchronize_irq(struct il_priv *il) { /* wait to make sure we flush pending tasklet */ synchronize_irq(il->pci_dev->irq); tasklet_kill(&il->irq_tasklet); } static void il4965_irq_tasklet(struct tasklet_struct *t) { struct il_priv *il = from_tasklet(il, t, irq_tasklet); u32 inta, handled = 0; u32 inta_fh; unsigned long flags; u32 i; #ifdef CONFIG_IWLEGACY_DEBUG u32 inta_mask; #endif spin_lock_irqsave(&il->lock, flags); /* Ack/clear/reset pending uCode interrupts. * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, * and will clear only when CSR_FH_INT_STATUS gets cleared. */ inta = _il_rd(il, CSR_INT); _il_wr(il, CSR_INT, inta); /* Ack/clear/reset pending flow-handler (DMA) interrupts. * Any new interrupts that happen after this, either while we're * in this tasklet, or later, will show up in next ISR/tasklet. */ inta_fh = _il_rd(il, CSR_FH_INT_STATUS); _il_wr(il, CSR_FH_INT_STATUS, inta_fh); #ifdef CONFIG_IWLEGACY_DEBUG if (il_get_debug_level(il) & IL_DL_ISR) { /* just for debug */ inta_mask = _il_rd(il, CSR_INT_MASK); D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask, inta_fh); } #endif spin_unlock_irqrestore(&il->lock, flags); /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not * atomic, make sure that inta covers all the interrupts that * we've discovered, even if FH interrupt came in just after * reading CSR_INT. */ if (inta_fh & CSR49_FH_INT_RX_MASK) inta |= CSR_INT_BIT_FH_RX; if (inta_fh & CSR49_FH_INT_TX_MASK) inta |= CSR_INT_BIT_FH_TX; /* Now service all interrupt bits discovered above. */ if (inta & CSR_INT_BIT_HW_ERR) { IL_ERR("Hardware error detected. Restarting.\n"); /* Tell the device to stop sending interrupts */ il_disable_interrupts(il); il->isr_stats.hw++; il_irq_handle_error(il); handled |= CSR_INT_BIT_HW_ERR; return; } #ifdef CONFIG_IWLEGACY_DEBUG if (il_get_debug_level(il) & (IL_DL_ISR)) { /* NIC fires this, but we don't use it, redundant with WAKEUP */ if (inta & CSR_INT_BIT_SCD) { D_ISR("Scheduler finished to transmit " "the frame/frames.\n"); il->isr_stats.sch++; } /* Alive notification via Rx interrupt will do the real work */ if (inta & CSR_INT_BIT_ALIVE) { D_ISR("Alive interrupt\n"); il->isr_stats.alive++; } } #endif /* Safely ignore these bits for debug checks below */ inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); /* HW RF KILL switch toggled */ if (inta & CSR_INT_BIT_RF_KILL) { int hw_rf_kill = 0; if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) hw_rf_kill = 1; IL_WARN("RF_KILL bit toggled to %s.\n", hw_rf_kill ? "disable radio" : "enable radio"); il->isr_stats.rfkill++; /* driver only loads ucode once setting the interface up. * the driver allows loading the ucode even if the radio * is killed. Hence update the killswitch state here. The * rfkill handler will care about restarting if needed. */ if (hw_rf_kill) { set_bit(S_RFKILL, &il->status); } else { clear_bit(S_RFKILL, &il->status); il_force_reset(il, true); } wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill); handled |= CSR_INT_BIT_RF_KILL; } /* Chip got too hot and stopped itself */ if (inta & CSR_INT_BIT_CT_KILL) { IL_ERR("Microcode CT kill error detected.\n"); il->isr_stats.ctkill++; handled |= CSR_INT_BIT_CT_KILL; } /* Error detected by uCode */ if (inta & CSR_INT_BIT_SW_ERR) { IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n", inta); il->isr_stats.sw++; il_irq_handle_error(il); handled |= CSR_INT_BIT_SW_ERR; } /* * uCode wakes up after power-down sleep. * Tell device about any new tx or host commands enqueued, * and about any Rx buffers made available while asleep. */ if (inta & CSR_INT_BIT_WAKEUP) { D_ISR("Wakeup interrupt\n"); il_rx_queue_update_write_ptr(il, &il->rxq); for (i = 0; i < il->hw_params.max_txq_num; i++) il_txq_update_write_ptr(il, &il->txq[i]); il->isr_stats.wakeup++; handled |= CSR_INT_BIT_WAKEUP; } /* All uCode command responses, including Tx command responses, * Rx "responses" (frame-received notification), and other * notifications from uCode come through here*/ if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { il4965_rx_handle(il); il->isr_stats.rx++; handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); } /* This "Tx" DMA channel is used only for loading uCode */ if (inta & CSR_INT_BIT_FH_TX) { D_ISR("uCode load interrupt\n"); il->isr_stats.tx++; handled |= CSR_INT_BIT_FH_TX; /* Wake up uCode load routine, now that load is complete */ il->ucode_write_complete = 1; wake_up(&il->wait_command_queue); } if (inta & ~handled) { IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled); il->isr_stats.unhandled++; } if (inta & ~(il->inta_mask)) { IL_WARN("Disabled INTA bits 0x%08x were pending\n", inta & ~il->inta_mask); IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh); } /* Re-enable all interrupts */ /* only Re-enable if disabled by irq */ if (test_bit(S_INT_ENABLED, &il->status)) il_enable_interrupts(il); /* Re-enable RF_KILL if it occurred */ else if (handled & CSR_INT_BIT_RF_KILL) il_enable_rfkill_int(il); #ifdef CONFIG_IWLEGACY_DEBUG if (il_get_debug_level(il) & (IL_DL_ISR)) { inta = _il_rd(il, CSR_INT); inta_mask = _il_rd(il, CSR_INT_MASK); inta_fh = _il_rd(il, CSR_FH_INT_STATUS); D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); } #endif } /***************************************************************************** * * sysfs attributes * *****************************************************************************/ #ifdef CONFIG_IWLEGACY_DEBUG /* * The following adds a new attribute to the sysfs representation * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/) * used for controlling the debug level. * * See the level definitions in iwl for details. * * The debug_level being managed using sysfs below is a per device debug * level that is used instead of the global debug level if it (the per * device debug level) is set. */ static ssize_t il4965_show_debug_level(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); return sprintf(buf, "0x%08X\n", il_get_debug_level(il)); } static ssize_t il4965_store_debug_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il = dev_get_drvdata(d); unsigned long val; int ret; ret = kstrtoul(buf, 0, &val); if (ret) IL_ERR("%s is not in hex or decimal form.\n", buf); else il->debug_level = val; return strnlen(buf, count); } static DEVICE_ATTR(debug_level, 0644, il4965_show_debug_level, il4965_store_debug_level); #endif /* CONFIG_IWLEGACY_DEBUG */ static ssize_t il4965_show_temperature(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); if (!il_is_alive(il)) return -EAGAIN; return sprintf(buf, "%d\n", il->temperature); } static DEVICE_ATTR(temperature, 0444, il4965_show_temperature, NULL); static ssize_t il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); if (!il_is_ready_rf(il)) return sprintf(buf, "off\n"); else return sprintf(buf, "%d\n", il->tx_power_user_lmt); } static ssize_t il4965_store_tx_power(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il = dev_get_drvdata(d); unsigned long val; int ret; ret = kstrtoul(buf, 10, &val); if (ret) IL_INFO("%s is not in decimal form.\n", buf); else { ret = il_set_tx_power(il, val, false); if (ret) IL_ERR("failed setting tx power (0x%08x).\n", ret); else ret = count; } return ret; } static DEVICE_ATTR(tx_power, 0644, il4965_show_tx_power, il4965_store_tx_power); static struct attribute *il_sysfs_entries[] = { &dev_attr_temperature.attr, &dev_attr_tx_power.attr, #ifdef CONFIG_IWLEGACY_DEBUG &dev_attr_debug_level.attr, #endif NULL }; static const struct attribute_group il_attribute_group = { .name = NULL, /* put in device directory */ .attrs = il_sysfs_entries, }; /****************************************************************************** * * uCode download functions * ******************************************************************************/ static void il4965_dealloc_ucode_pci(struct il_priv *il) { il_free_fw_desc(il->pci_dev, &il->ucode_code); il_free_fw_desc(il->pci_dev, &il->ucode_data); il_free_fw_desc(il->pci_dev, &il->ucode_data_backup); il_free_fw_desc(il->pci_dev, &il->ucode_init); il_free_fw_desc(il->pci_dev, &il->ucode_init_data); il_free_fw_desc(il->pci_dev, &il->ucode_boot); } static void il4965_nic_start(struct il_priv *il) { /* Remove all resets to allow NIC to operate */ _il_wr(il, CSR_RESET, 0); } static void il4965_ucode_callback(const struct firmware *ucode_raw, void *context); static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length); static int __must_check il4965_request_firmware(struct il_priv *il, bool first) { const char *name_pre = il->cfg->fw_name_pre; char tag[8]; if (first) { il->fw_idx = il->cfg->ucode_api_max; sprintf(tag, "%d", il->fw_idx); } else { il->fw_idx--; sprintf(tag, "%d", il->fw_idx); } if (il->fw_idx < il->cfg->ucode_api_min) { IL_ERR("no suitable firmware found!\n"); return -ENOENT; } sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode"); D_INFO("attempting to load firmware '%s'\n", il->firmware_name); return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name, &il->pci_dev->dev, GFP_KERNEL, il, il4965_ucode_callback); } struct il4965_firmware_pieces { const void *inst, *data, *init, *init_data, *boot; size_t inst_size, data_size, init_size, init_data_size, boot_size; }; static int il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw, struct il4965_firmware_pieces *pieces) { struct il_ucode_header *ucode = (void *)ucode_raw->data; u32 api_ver, hdr_size; const u8 *src; il->ucode_ver = le32_to_cpu(ucode->ver); api_ver = IL_UCODE_API(il->ucode_ver); switch (api_ver) { default: case 0: case 1: case 2: hdr_size = 24; if (ucode_raw->size < hdr_size) { IL_ERR("File size too small!\n"); return -EINVAL; } pieces->inst_size = le32_to_cpu(ucode->v1.inst_size); pieces->data_size = le32_to_cpu(ucode->v1.data_size); pieces->init_size = le32_to_cpu(ucode->v1.init_size); pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size); pieces->boot_size = le32_to_cpu(ucode->v1.boot_size); src = ucode->v1.data; break; } /* Verify size of file vs. image size info in file's header */ if (ucode_raw->size != hdr_size + pieces->inst_size + pieces->data_size + pieces->init_size + pieces->init_data_size + pieces->boot_size) { IL_ERR("uCode file size %d does not match expected size\n", (int)ucode_raw->size); return -EINVAL; } pieces->inst = src; src += pieces->inst_size; pieces->data = src; src += pieces->data_size; pieces->init = src; src += pieces->init_size; pieces->init_data = src; src += pieces->init_data_size; pieces->boot = src; src += pieces->boot_size; return 0; } /* * il4965_ucode_callback - callback when firmware was loaded * * If loaded successfully, copies the firmware into buffers * for the card to fetch (via DMA). */ static void il4965_ucode_callback(const struct firmware *ucode_raw, void *context) { struct il_priv *il = context; int err; struct il4965_firmware_pieces pieces; const unsigned int api_max = il->cfg->ucode_api_max; const unsigned int api_min = il->cfg->ucode_api_min; u32 api_ver; u32 max_probe_length = 200; u32 standard_phy_calibration_size = IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE; memset(&pieces, 0, sizeof(pieces)); if (!ucode_raw) { if (il->fw_idx <= il->cfg->ucode_api_max) IL_ERR("request for firmware file '%s' failed.\n", il->firmware_name); goto try_again; } D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name, ucode_raw->size); /* Make sure that we got at least the API version number */ if (ucode_raw->size < 4) { IL_ERR("File size way too small!\n"); goto try_again; } /* Data from ucode file: header followed by uCode images */ err = il4965_load_firmware(il, ucode_raw, &pieces); if (err) goto try_again; api_ver = IL_UCODE_API(il->ucode_ver); /* * api_ver should match the api version forming part of the * firmware filename ... but we don't check for that and only rely * on the API version read from firmware header from here on forward */ if (api_ver < api_min || api_ver > api_max) { IL_ERR("Driver unable to support your firmware API. " "Driver supports v%u, firmware is v%u.\n", api_max, api_ver); goto try_again; } if (api_ver != api_max) IL_ERR("Firmware has old API version. Expected v%u, " "got v%u. New firmware can be obtained " "from http://www.intellinuxwireless.org.\n", api_max, api_ver); IL_INFO("loaded firmware version %u.%u.%u.%u\n", IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver)); snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version), "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver)); /* * For any of the failures below (before allocating pci memory) * we will try to load a version with a smaller API -- maybe the * user just got a corrupted version of the latest API. */ D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver); D_INFO("f/w package hdr runtime inst size = %zd\n", pieces.inst_size); D_INFO("f/w package hdr runtime data size = %zd\n", pieces.data_size); D_INFO("f/w package hdr init inst size = %zd\n", pieces.init_size); D_INFO("f/w package hdr init data size = %zd\n", pieces.init_data_size); D_INFO("f/w package hdr boot inst size = %zd\n", pieces.boot_size); /* Verify that uCode images will fit in card's SRAM */ if (pieces.inst_size > il->hw_params.max_inst_size) { IL_ERR("uCode instr len %zd too large to fit in\n", pieces.inst_size); goto try_again; } if (pieces.data_size > il->hw_params.max_data_size) { IL_ERR("uCode data len %zd too large to fit in\n", pieces.data_size); goto try_again; } if (pieces.init_size > il->hw_params.max_inst_size) { IL_ERR("uCode init instr len %zd too large to fit in\n", pieces.init_size); goto try_again; } if (pieces.init_data_size > il->hw_params.max_data_size) { IL_ERR("uCode init data len %zd too large to fit in\n", pieces.init_data_size); goto try_again; } if (pieces.boot_size > il->hw_params.max_bsm_size) { IL_ERR("uCode boot instr len %zd too large to fit in\n", pieces.boot_size); goto try_again; } /* Allocate ucode buffers for card's bus-master loading ... */ /* Runtime instructions and 2 copies of data: * 1) unmodified from disk * 2) backup cache for save/restore during power-downs */ il->ucode_code.len = pieces.inst_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_code); il->ucode_data.len = pieces.data_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_data); il->ucode_data_backup.len = pieces.data_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup); if (!il->ucode_code.v_addr || !il->ucode_data.v_addr || !il->ucode_data_backup.v_addr) goto err_pci_alloc; /* Initialization instructions and data */ if (pieces.init_size && pieces.init_data_size) { il->ucode_init.len = pieces.init_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_init); il->ucode_init_data.len = pieces.init_data_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data); if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr) goto err_pci_alloc; } /* Bootstrap (instructions only, no data) */ if (pieces.boot_size) { il->ucode_boot.len = pieces.boot_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_boot); if (!il->ucode_boot.v_addr) goto err_pci_alloc; } /* Now that we can no longer fail, copy information */ il->sta_key_max_num = STA_KEY_MAX_NUM; /* Copy images into buffers for card's bus-master reads ... */ /* Runtime instructions (first block of data in file) */ D_INFO("Copying (but not loading) uCode instr len %zd\n", pieces.inst_size); memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size); D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", il->ucode_code.v_addr, (u32) il->ucode_code.p_addr); /* * Runtime data * NOTE: Copy into backup buffer will be done in il_up() */ D_INFO("Copying (but not loading) uCode data len %zd\n", pieces.data_size); memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size); memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size); /* Initialization instructions */ if (pieces.init_size) { D_INFO("Copying (but not loading) init instr len %zd\n", pieces.init_size); memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size); } /* Initialization data */ if (pieces.init_data_size) { D_INFO("Copying (but not loading) init data len %zd\n", pieces.init_data_size); memcpy(il->ucode_init_data.v_addr, pieces.init_data, pieces.init_data_size); } /* Bootstrap instructions */ D_INFO("Copying (but not loading) boot instr len %zd\n", pieces.boot_size); memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size); /* * figure out the offset of chain noise reset and gain commands * base on the size of standard phy calibration commands table size */ il->_4965.phy_calib_chain_noise_reset_cmd = standard_phy_calibration_size; il->_4965.phy_calib_chain_noise_gain_cmd = standard_phy_calibration_size + 1; /************************************************** * This is still part of probe() in a sense... * * 9. Setup and register with mac80211 and debugfs **************************************************/ err = il4965_mac_setup_register(il, max_probe_length); if (err) goto out_unbind; il_dbgfs_register(il, DRV_NAME); err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group); if (err) { IL_ERR("failed to create sysfs device attributes\n"); goto out_unbind; } /* We have our copies now, allow OS release its copies */ release_firmware(ucode_raw); complete(&il->_4965.firmware_loading_complete); return; try_again: /* try next, if any */ if (il4965_request_firmware(il, false)) goto out_unbind; release_firmware(ucode_raw); return; err_pci_alloc: IL_ERR("failed to allocate pci memory\n"); il4965_dealloc_ucode_pci(il); out_unbind: complete(&il->_4965.firmware_loading_complete); device_release_driver(&il->pci_dev->dev); release_firmware(ucode_raw); } static const char *const desc_lookup_text[] = { "OK", "FAIL", "BAD_PARAM", "BAD_CHECKSUM", "NMI_INTERRUPT_WDG", "SYSASSERT", "FATAL_ERROR", "BAD_COMMAND", "HW_ERROR_TUNE_LOCK", "HW_ERROR_TEMPERATURE", "ILLEGAL_CHAN_FREQ", "VCC_NOT_STBL", "FH49_ERROR", "NMI_INTERRUPT_HOST", "NMI_INTERRUPT_ACTION_PT", "NMI_INTERRUPT_UNKNOWN", "UCODE_VERSION_MISMATCH", "HW_ERROR_ABS_LOCK", "HW_ERROR_CAL_LOCK_FAIL", "NMI_INTERRUPT_INST_ACTION_PT", "NMI_INTERRUPT_DATA_ACTION_PT", "NMI_TRM_HW_ER", "NMI_INTERRUPT_TRM", "NMI_INTERRUPT_BREAK_POINT", "DEBUG_0", "DEBUG_1", "DEBUG_2", "DEBUG_3", }; static struct { char *name; u8 num; } advanced_lookup[] = { { "NMI_INTERRUPT_WDG", 0x34}, { "SYSASSERT", 0x35}, { "UCODE_VERSION_MISMATCH", 0x37}, { "BAD_COMMAND", 0x38}, { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, { "FATAL_ERROR", 0x3D}, { "NMI_TRM_HW_ERR", 0x46}, { "NMI_INTERRUPT_TRM", 0x4C}, { "NMI_INTERRUPT_BREAK_POINT", 0x54}, { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, { "NMI_INTERRUPT_HOST", 0x66}, { "NMI_INTERRUPT_ACTION_PT", 0x7C}, { "NMI_INTERRUPT_UNKNOWN", 0x84}, { "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, { "ADVANCED_SYSASSERT", 0},}; static const char * il4965_desc_lookup(u32 num) { int i; int max = ARRAY_SIZE(desc_lookup_text); if (num < max) return desc_lookup_text[num]; max = ARRAY_SIZE(advanced_lookup) - 1; for (i = 0; i < max; i++) { if (advanced_lookup[i].num == num) break; } return advanced_lookup[i].name; } #define ERROR_START_OFFSET (1 * sizeof(u32)) #define ERROR_ELEM_SIZE (7 * sizeof(u32)) void il4965_dump_nic_error_log(struct il_priv *il) { u32 data2, line; u32 desc, time, count, base, data1; u32 blink1, blink2, ilink1, ilink2; u32 pc, hcmd; if (il->ucode_type == UCODE_INIT) base = le32_to_cpu(il->card_alive_init.error_event_table_ptr); else base = le32_to_cpu(il->card_alive.error_event_table_ptr); if (!il->ops->is_valid_rtc_data_addr(base)) { IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n", base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT"); return; } count = il_read_targ_mem(il, base); if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { IL_ERR("Start IWL Error Log Dump:\n"); IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count); } desc = il_read_targ_mem(il, base + 1 * sizeof(u32)); il->isr_stats.err_code = desc; pc = il_read_targ_mem(il, base + 2 * sizeof(u32)); blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32)); blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32)); ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32)); ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32)); data1 = il_read_targ_mem(il, base + 7 * sizeof(u32)); data2 = il_read_targ_mem(il, base + 8 * sizeof(u32)); line = il_read_targ_mem(il, base + 9 * sizeof(u32)); time = il_read_targ_mem(il, base + 11 * sizeof(u32)); hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32)); IL_ERR("Desc Time " "data1 data2 line\n"); IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n", il4965_desc_lookup(desc), desc, time, data1, data2, line); IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n"); IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1, blink2, ilink1, ilink2, hcmd); } static void il4965_rf_kill_ct_config(struct il_priv *il) { struct il_ct_kill_config cmd; unsigned long flags; int ret = 0; spin_lock_irqsave(&il->lock, flags); _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); spin_unlock_irqrestore(&il->lock, flags); cmd.critical_temperature_R = cpu_to_le32(il->hw_params.ct_kill_threshold); ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd); if (ret) IL_ERR("C_CT_KILL_CONFIG failed\n"); else D_INFO("C_CT_KILL_CONFIG " "succeeded, " "critical temperature is %d\n", il->hw_params.ct_kill_threshold); } static const s8 default_queue_to_tx_fifo[] = { IL_TX_FIFO_VO, IL_TX_FIFO_VI, IL_TX_FIFO_BE, IL_TX_FIFO_BK, IL49_CMD_FIFO_NUM, IL_TX_FIFO_UNUSED, IL_TX_FIFO_UNUSED, }; #define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) static int il4965_alive_notify(struct il_priv *il) { u32 a; unsigned long flags; int i, chan; u32 reg_val; spin_lock_irqsave(&il->lock, flags); /* Clear 4965's internal Tx Scheduler data base */ il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR); a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET; for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4) il_write_targ_mem(il, a, 0); for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4) il_write_targ_mem(il, a, 0); for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num); a += 4) il_write_targ_mem(il, a, 0); /* Tel 4965 where to find Tx byte count tables */ il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10); /* Enable DMA channel */ for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++) il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan), FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); /* Update FH chicken bits */ reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG); il_wr(il, FH49_TX_CHICKEN_BITS_REG, reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); /* Disable chain mode for all queues */ il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0); /* Initialize each Tx queue (including the command queue) */ for (i = 0; i < il->hw_params.max_txq_num; i++) { /* TFD circular buffer read/write idxes */ il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0); il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8)); /* Max Tx Window size for Scheduler-ACK mode */ il_write_targ_mem(il, il->scd_base_addr + IL49_SCD_CONTEXT_QUEUE_OFFSET(i), (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); /* Frame limit */ il_write_targ_mem(il, il->scd_base_addr + IL49_SCD_CONTEXT_QUEUE_OFFSET(i) + sizeof(u32), (SCD_FRAME_LIMIT << IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); } il_wr_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << il->hw_params.max_txq_num) - 1); /* Activate all Tx DMA/FIFO channels */ il4965_txq_set_sched(il, IL_MASK(0, 6)); il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0); /* make sure all queue are not stopped */ memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped)); for (i = 0; i < 4; i++) atomic_set(&il->queue_stop_count[i], 0); /* reset to 0 to enable all the queue first */ il->txq_ctx_active_msk = 0; /* Map each Tx/cmd queue to its corresponding fifo */ BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7); for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) { int ac = default_queue_to_tx_fifo[i]; il_txq_ctx_activate(il, i); if (ac == IL_TX_FIFO_UNUSED) continue; il4965_tx_queue_set_status(il, &il->txq[i], ac, 0); } spin_unlock_irqrestore(&il->lock, flags); return 0; } /* * il4965_alive_start - called after N_ALIVE notification received * from protocol/runtime uCode (initialization uCode's * Alive gets handled by il_init_alive_start()). */ static void il4965_alive_start(struct il_priv *il) { int ret = 0; D_INFO("Runtime Alive received.\n"); if (il->card_alive.is_valid != UCODE_VALID_OK) { /* We had an error bringing up the hardware, so take it * all the way back down so we can try again */ D_INFO("Alive failed.\n"); goto restart; } /* Initialize uCode has loaded Runtime uCode ... verify inst image. * This is a paranoid check, because we would not have gotten the * "runtime" alive if code weren't properly loaded. */ if (il4965_verify_ucode(il)) { /* Runtime instruction load was bad; * take it all the way back down so we can try again */ D_INFO("Bad runtime uCode load.\n"); goto restart; } ret = il4965_alive_notify(il); if (ret) { IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret); goto restart; } /* After the ALIVE response, we can send host commands to the uCode */ set_bit(S_ALIVE, &il->status); /* Enable watchdog to monitor the driver tx queues */ il_setup_watchdog(il); if (il_is_rfkill(il)) return; ieee80211_wake_queues(il->hw); il->active_rate = RATES_MASK; il_power_update_mode(il, true); D_INFO("Updated power mode\n"); if (il_is_associated(il)) { struct il_rxon_cmd *active_rxon = (struct il_rxon_cmd *)&il->active; /* apply any changes in staging */ il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; } else { /* Initialize our rx_config data */ il_connection_init_rx_config(il); if (il->ops->set_rxon_chain) il->ops->set_rxon_chain(il); } /* Configure bluetooth coexistence if enabled */ il_send_bt_config(il); il4965_reset_run_time_calib(il); set_bit(S_READY, &il->status); /* Configure the adapter for unassociated operation */ il_commit_rxon(il); /* At this point, the NIC is initialized and operational */ il4965_rf_kill_ct_config(il); D_INFO("ALIVE processing complete.\n"); wake_up(&il->wait_command_queue); return; restart: queue_work(il->workqueue, &il->restart); } static void il4965_cancel_deferred_work(struct il_priv *il); static void __il4965_down(struct il_priv *il) { unsigned long flags; int exit_pending; D_INFO(DRV_NAME " is going down\n"); il_scan_cancel_timeout(il, 200); exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status); /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set * to prevent rearm timer */ del_timer_sync(&il->watchdog); il_clear_ucode_stations(il); /* FIXME: race conditions ? */ spin_lock_irq(&il->sta_lock); /* * Remove all key information that is not stored as part * of station information since mac80211 may not have had * a chance to remove all the keys. When device is * reconfigured by mac80211 after an error all keys will * be reconfigured. */ memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys)); il->_4965.key_mapping_keys = 0; spin_unlock_irq(&il->sta_lock); il_dealloc_bcast_stations(il); il_clear_driver_stations(il); /* Unblock any waiting calls */ wake_up_all(&il->wait_command_queue); /* Wipe out the EXIT_PENDING status bit if we are not actually * exiting the module */ if (!exit_pending) clear_bit(S_EXIT_PENDING, &il->status); /* stop and reset the on-board processor */ _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); /* tell the device to stop sending interrupts */ spin_lock_irqsave(&il->lock, flags); il_disable_interrupts(il); spin_unlock_irqrestore(&il->lock, flags); il4965_synchronize_irq(il); if (il->mac80211_registered) ieee80211_stop_queues(il->hw); /* If we have not previously called il_init() then * clear all bits but the RF Kill bit and return */ if (!il_is_init(il)) { il->status = test_bit(S_RFKILL, &il->status) << S_RFKILL | test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; goto exit; } /* ...otherwise clear out all the status bits but the RF Kill * bit and continue taking the NIC down. */ il->status &= test_bit(S_RFKILL, &il->status) << S_RFKILL | test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR | test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; /* * We disabled and synchronized interrupt, and priv->mutex is taken, so * here is the only thread which will program device registers, but * still have lockdep assertions, so we are taking reg_lock. */ spin_lock_irq(&il->reg_lock); /* FIXME: il_grab_nic_access if rfkill is off ? */ il4965_txq_ctx_stop(il); il4965_rxq_stop(il); /* Power-down device's busmaster DMA clocks */ _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); udelay(5); /* Make sure (redundant) we've released our request to stay awake */ _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); /* Stop the device, and put it in low power state */ _il_apm_stop(il); spin_unlock_irq(&il->reg_lock); il4965_txq_ctx_unmap(il); exit: memset(&il->card_alive, 0, sizeof(struct il_alive_resp)); dev_kfree_skb(il->beacon_skb); il->beacon_skb = NULL; /* clear out any free frames */ il4965_clear_free_frames(il); } static void il4965_down(struct il_priv *il) { mutex_lock(&il->mutex); __il4965_down(il); mutex_unlock(&il->mutex); il4965_cancel_deferred_work(il); } static void il4965_set_hw_ready(struct il_priv *il) { int ret; il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); /* See if we got it */ ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 100); if (ret >= 0) il->hw_ready = true; D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not"); } static void il4965_prepare_card_hw(struct il_priv *il) { int ret; il->hw_ready = false; il4965_set_hw_ready(il); if (il->hw_ready) return; /* If HW is not ready, prepare the conditions to check again */ il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE); ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000); /* HW should be ready by now, check again. */ if (ret != -ETIMEDOUT) il4965_set_hw_ready(il); } #define MAX_HW_RESTARTS 5 static int __il4965_up(struct il_priv *il) { int i; int ret; if (test_bit(S_EXIT_PENDING, &il->status)) { IL_WARN("Exit pending; will not bring the NIC up\n"); return -EIO; } if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) { IL_ERR("ucode not available for device bringup\n"); return -EIO; } ret = il4965_alloc_bcast_station(il); if (ret) { il_dealloc_bcast_stations(il); return ret; } il4965_prepare_card_hw(il); if (!il->hw_ready) { il_dealloc_bcast_stations(il); IL_ERR("HW not ready\n"); return -EIO; } /* If platform's RF_KILL switch is NOT set to KILL */ if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(S_RFKILL, &il->status); else { set_bit(S_RFKILL, &il->status); wiphy_rfkill_set_hw_state(il->hw->wiphy, true); il_dealloc_bcast_stations(il); il_enable_rfkill_int(il); IL_WARN("Radio disabled by HW RF Kill switch\n"); return 0; } _il_wr(il, CSR_INT, 0xFFFFFFFF); /* must be initialised before il_hw_nic_init */ il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM; ret = il4965_hw_nic_init(il); if (ret) { IL_ERR("Unable to init nic\n"); il_dealloc_bcast_stations(il); return ret; } /* make sure rfkill handshake bits are cleared */ _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); /* clear (again), then enable host interrupts */ _il_wr(il, CSR_INT, 0xFFFFFFFF); il_enable_interrupts(il); /* really make sure rfkill handshake bits are cleared */ _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); /* Copy original ucode data image from disk into backup cache. * This will be used to initialize the on-board processor's * data SRAM for a clean start when the runtime program first loads. */ memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr, il->ucode_data.len); for (i = 0; i < MAX_HW_RESTARTS; i++) { /* load bootstrap state machine, * load bootstrap program into processor's memory, * prepare to load the "initialize" uCode */ ret = il->ops->load_ucode(il); if (ret) { IL_ERR("Unable to set up bootstrap uCode: %d\n", ret); continue; } /* start card; "initialize" will load runtime ucode */ il4965_nic_start(il); D_INFO(DRV_NAME " is coming up\n"); return 0; } set_bit(S_EXIT_PENDING, &il->status); __il4965_down(il); clear_bit(S_EXIT_PENDING, &il->status); /* tried to restart and config the device for as long as our * patience could withstand */ IL_ERR("Unable to initialize device after %d attempts.\n", i); return -EIO; } /***************************************************************************** * * Workqueue callbacks * *****************************************************************************/ static void il4965_bg_init_alive_start(struct work_struct *data) { struct il_priv *il = container_of(data, struct il_priv, init_alive_start.work); mutex_lock(&il->mutex); if (test_bit(S_EXIT_PENDING, &il->status)) goto out; il->ops->init_alive_start(il); out: mutex_unlock(&il->mutex); } static void il4965_bg_alive_start(struct work_struct *data) { struct il_priv *il = container_of(data, struct il_priv, alive_start.work); mutex_lock(&il->mutex); if (test_bit(S_EXIT_PENDING, &il->status)) goto out; il4965_alive_start(il); out: mutex_unlock(&il->mutex); } static void il4965_bg_run_time_calib_work(struct work_struct *work) { struct il_priv *il = container_of(work, struct il_priv, run_time_calib_work); mutex_lock(&il->mutex); if (test_bit(S_EXIT_PENDING, &il->status) || test_bit(S_SCANNING, &il->status)) { mutex_unlock(&il->mutex); return; } if (il->start_calib) { il4965_chain_noise_calibration(il, (void *)&il->_4965.stats); il4965_sensitivity_calibration(il, (void *)&il->_4965.stats); } mutex_unlock(&il->mutex); } static void il4965_bg_restart(struct work_struct *data) { struct il_priv *il = container_of(data, struct il_priv, restart); if (test_bit(S_EXIT_PENDING, &il->status)) return; if (test_and_clear_bit(S_FW_ERROR, &il->status)) { mutex_lock(&il->mutex); il->is_open = 0; __il4965_down(il); mutex_unlock(&il->mutex); il4965_cancel_deferred_work(il); ieee80211_restart_hw(il->hw); } else { il4965_down(il); mutex_lock(&il->mutex); if (test_bit(S_EXIT_PENDING, &il->status)) { mutex_unlock(&il->mutex); return; } __il4965_up(il); mutex_unlock(&il->mutex); } } static void il4965_bg_rx_replenish(struct work_struct *data) { struct il_priv *il = container_of(data, struct il_priv, rx_replenish); if (test_bit(S_EXIT_PENDING, &il->status)) return; mutex_lock(&il->mutex); il4965_rx_replenish(il); mutex_unlock(&il->mutex); } /***************************************************************************** * * mac80211 entry point functions * *****************************************************************************/ #define UCODE_READY_TIMEOUT (4 * HZ) /* * Not a mac80211 entry point function, but it fits in with all the * other mac80211 functions grouped here. */ static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length) { int ret; struct ieee80211_hw *hw = il->hw; hw->rate_control_algorithm = "iwl-4965-rs"; /* Tell mac80211 our characteristics */ ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); ieee80211_hw_set(hw, SUPPORTS_PS); ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); ieee80211_hw_set(hw, SPECTRUM_MGMT); ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); ieee80211_hw_set(hw, SIGNAL_DBM); ieee80211_hw_set(hw, AMPDU_AGGREGATION); if (il->cfg->sku & IL_SKU_N) hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | NL80211_FEATURE_STATIC_SMPS; hw->sta_data_size = sizeof(struct il_station_priv); hw->vif_data_size = sizeof(struct il_vif_priv); hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | REGULATORY_DISABLE_BEACON_HINTS; /* * For now, disable PS by default because it affects * RX performance significantly. */ hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; /* we create the 802.11 header and a zero-length SSID element */ hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2; /* Default value; 4 EDCA QOS priorities */ hw->queues = 4; hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL; if (il->bands[NL80211_BAND_2GHZ].n_channels) il->hw->wiphy->bands[NL80211_BAND_2GHZ] = &il->bands[NL80211_BAND_2GHZ]; if (il->bands[NL80211_BAND_5GHZ].n_channels) il->hw->wiphy->bands[NL80211_BAND_5GHZ] = &il->bands[NL80211_BAND_5GHZ]; il_leds_init(il); wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); ret = ieee80211_register_hw(il->hw); if (ret) { IL_ERR("Failed to register hw (error %d)\n", ret); return ret; } il->mac80211_registered = 1; return 0; } int il4965_mac_start(struct ieee80211_hw *hw) { struct il_priv *il = hw->priv; int ret; D_MAC80211("enter\n"); /* we should be verifying the device is ready to be opened */ mutex_lock(&il->mutex); ret = __il4965_up(il); mutex_unlock(&il->mutex); if (ret) return ret; if (il_is_rfkill(il)) goto out; D_INFO("Start UP work done.\n"); /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from * mac80211 will not be run successfully. */ ret = wait_event_timeout(il->wait_command_queue, test_bit(S_READY, &il->status), UCODE_READY_TIMEOUT); if (!ret) { if (!test_bit(S_READY, &il->status)) { IL_ERR("START_ALIVE timeout after %dms.\n", jiffies_to_msecs(UCODE_READY_TIMEOUT)); return -ETIMEDOUT; } } il4965_led_enable(il); out: il->is_open = 1; D_MAC80211("leave\n"); return 0; } void il4965_mac_stop(struct ieee80211_hw *hw) { struct il_priv *il = hw->priv; D_MAC80211("enter\n"); if (!il->is_open) return; il->is_open = 0; il4965_down(il); flush_workqueue(il->workqueue); /* User space software may expect getting rfkill changes * even if interface is down */ _il_wr(il, CSR_INT, 0xFFFFFFFF); il_enable_rfkill_int(il); D_MAC80211("leave\n"); } void il4965_mac_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control, struct sk_buff *skb) { struct il_priv *il = hw->priv; D_MACDUMP("enter\n"); D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); if (il4965_tx_skb(il, control->sta, skb)) dev_kfree_skb_any(skb); D_MACDUMP("leave\n"); } void il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_key_conf *keyconf, struct ieee80211_sta *sta, u32 iv32, u16 * phase1key) { struct il_priv *il = hw->priv; D_MAC80211("enter\n"); il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key); D_MAC80211("leave\n"); } int il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *key) { struct il_priv *il = hw->priv; int ret; u8 sta_id; bool is_default_wep_key = false; D_MAC80211("enter\n"); if (il->cfg->mod_params->sw_crypto) { D_MAC80211("leave - hwcrypto disabled\n"); return -EOPNOTSUPP; } /* * To support IBSS RSN, don't program group keys in IBSS, the * hardware will then not attempt to decrypt the frames. */ if (vif->type == NL80211_IFTYPE_ADHOC && !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { D_MAC80211("leave - ad-hoc group key\n"); return -EOPNOTSUPP; } sta_id = il_sta_id_or_broadcast(il, sta); if (sta_id == IL_INVALID_STATION) return -EINVAL; mutex_lock(&il->mutex); il_scan_cancel_timeout(il, 100); /* * If we are getting WEP group key and we didn't receive any key mapping * so far, we are in legacy wep mode (group key only), otherwise we are * in 1X mode. * In legacy wep mode, we use another host command to the uCode. */ if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { if (cmd == SET_KEY) is_default_wep_key = !il->_4965.key_mapping_keys; else is_default_wep_key = (key->hw_key_idx == HW_KEY_DEFAULT); } switch (cmd) { case SET_KEY: if (is_default_wep_key) ret = il4965_set_default_wep_key(il, key); else ret = il4965_set_dynamic_key(il, key, sta_id); D_MAC80211("enable hwcrypto key\n"); break; case DISABLE_KEY: if (is_default_wep_key) ret = il4965_remove_default_wep_key(il, key); else ret = il4965_remove_dynamic_key(il, key, sta_id); D_MAC80211("disable hwcrypto key\n"); break; default: ret = -EINVAL; } mutex_unlock(&il->mutex); D_MAC80211("leave\n"); return ret; } int il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_ampdu_params *params) { struct il_priv *il = hw->priv; int ret = -EINVAL; struct ieee80211_sta *sta = params->sta; enum ieee80211_ampdu_mlme_action action = params->action; u16 tid = params->tid; u16 *ssn = ¶ms->ssn; D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid); if (!(il->cfg->sku & IL_SKU_N)) return -EACCES; mutex_lock(&il->mutex); switch (action) { case IEEE80211_AMPDU_RX_START: D_HT("start Rx\n"); ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn); break; case IEEE80211_AMPDU_RX_STOP: D_HT("stop Rx\n"); ret = il4965_sta_rx_agg_stop(il, sta, tid); if (test_bit(S_EXIT_PENDING, &il->status)) ret = 0; break; case IEEE80211_AMPDU_TX_START: D_HT("start Tx\n"); ret = il4965_tx_agg_start(il, vif, sta, tid, ssn); break; case IEEE80211_AMPDU_TX_STOP_CONT: case IEEE80211_AMPDU_TX_STOP_FLUSH: case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: D_HT("stop Tx\n"); ret = il4965_tx_agg_stop(il, vif, sta, tid); if (test_bit(S_EXIT_PENDING, &il->status)) ret = 0; break; case IEEE80211_AMPDU_TX_OPERATIONAL: ret = 0; break; } mutex_unlock(&il->mutex); return ret; } int il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct il_priv *il = hw->priv; struct il_station_priv *sta_priv = (void *)sta->drv_priv; bool is_ap = vif->type == NL80211_IFTYPE_STATION; int ret; u8 sta_id; D_INFO("received request to add station %pM\n", sta->addr); mutex_lock(&il->mutex); D_INFO("proceeding to add station %pM\n", sta->addr); sta_priv->common.sta_id = IL_INVALID_STATION; atomic_set(&sta_priv->pending_frames, 0); ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id); if (ret) { IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret); /* Should we return success if return code is EEXIST ? */ mutex_unlock(&il->mutex); return ret; } sta_priv->common.sta_id = sta_id; /* Initialize rate scaling */ D_INFO("Initializing rate scaling for station %pM\n", sta->addr); il4965_rs_rate_init(il, sta, sta_id); mutex_unlock(&il->mutex); return 0; } void il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_channel_switch *ch_switch) { struct il_priv *il = hw->priv; const struct il_channel_info *ch_info; struct ieee80211_conf *conf = &hw->conf; struct ieee80211_channel *channel = ch_switch->chandef.chan; struct il_ht_config *ht_conf = &il->current_ht_config; u16 ch; D_MAC80211("enter\n"); mutex_lock(&il->mutex); if (il_is_rfkill(il)) goto out; if (test_bit(S_EXIT_PENDING, &il->status) || test_bit(S_SCANNING, &il->status) || test_bit(S_CHANNEL_SWITCH_PENDING, &il->status)) goto out; if (!il_is_associated(il)) goto out; if (!il->ops->set_channel_switch) goto out; ch = channel->hw_value; if (le16_to_cpu(il->active.channel) == ch) goto out; ch_info = il_get_channel_info(il, channel->band, ch); if (!il_is_channel_valid(ch_info)) { D_MAC80211("invalid channel\n"); goto out; } spin_lock_irq(&il->lock); il->current_ht_config.smps = conf->smps_mode; /* Configure HT40 channels */ switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { case NL80211_CHAN_NO_HT: case NL80211_CHAN_HT20: il->ht.is_40mhz = false; il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; break; case NL80211_CHAN_HT40MINUS: il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; il->ht.is_40mhz = true; break; case NL80211_CHAN_HT40PLUS: il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; il->ht.is_40mhz = true; break; } if ((le16_to_cpu(il->staging.channel) != ch)) il->staging.flags = 0; il_set_rxon_channel(il, channel); il_set_rxon_ht(il, ht_conf); il_set_flags_for_band(il, channel->band, il->vif); spin_unlock_irq(&il->lock); il_set_rate(il); /* * at this point, staging_rxon has the * configuration for channel switch */ set_bit(S_CHANNEL_SWITCH_PENDING, &il->status); il->switch_channel = cpu_to_le16(ch); if (il->ops->set_channel_switch(il, ch_switch)) { clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status); il->switch_channel = 0; ieee80211_chswitch_done(il->vif, false); } out: mutex_unlock(&il->mutex); D_MAC80211("leave\n"); } void il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, u64 multicast) { struct il_priv *il = hw->priv; __le32 filter_or = 0, filter_nand = 0; #define CHK(test, flag) do { \ if (*total_flags & (test)) \ filter_or |= (flag); \ else \ filter_nand |= (flag); \ } while (0) D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags, *total_flags); CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); #undef CHK mutex_lock(&il->mutex); il->staging.filter_flags &= ~filter_nand; il->staging.filter_flags |= filter_or; /* * Not committing directly because hardware can perform a scan, * but we'll eventually commit the filter flags change anyway. */ mutex_unlock(&il->mutex); /* * Receiving all multicast frames is always enabled by the * default flags setup in il_connection_init_rx_config() * since we currently do not support programming multicast * filters into the device. */ *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; } /***************************************************************************** * * driver setup and teardown * *****************************************************************************/ static void il4965_bg_txpower_work(struct work_struct *work) { struct il_priv *il = container_of(work, struct il_priv, txpower_work); mutex_lock(&il->mutex); /* If a scan happened to start before we got here * then just return; the stats notification will * kick off another scheduled work to compensate for * any temperature delta we missed here. */ if (test_bit(S_EXIT_PENDING, &il->status) || test_bit(S_SCANNING, &il->status)) goto out; /* Regardless of if we are associated, we must reconfigure the * TX power since frames can be sent on non-radar channels while * not associated */ il->ops->send_tx_power(il); /* Update last_temperature to keep is_calib_needed from running * when it isn't needed... */ il->last_temperature = il->temperature; out: mutex_unlock(&il->mutex); } static void il4965_setup_deferred_work(struct il_priv *il) { il->workqueue = create_singlethread_workqueue(DRV_NAME); init_waitqueue_head(&il->wait_command_queue); INIT_WORK(&il->restart, il4965_bg_restart); INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish); INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work); INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start); INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start); il_setup_scan_deferred_work(il); INIT_WORK(&il->txpower_work, il4965_bg_txpower_work); timer_setup(&il->stats_periodic, il4965_bg_stats_periodic, 0); timer_setup(&il->watchdog, il_bg_watchdog, 0); tasklet_setup(&il->irq_tasklet, il4965_irq_tasklet); } static void il4965_cancel_deferred_work(struct il_priv *il) { cancel_work_sync(&il->txpower_work); cancel_delayed_work_sync(&il->init_alive_start); cancel_delayed_work(&il->alive_start); cancel_work_sync(&il->run_time_calib_work); il_cancel_scan_deferred_work(il); del_timer_sync(&il->stats_periodic); } static void il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates) { int i; for (i = 0; i < RATE_COUNT_LEGACY; i++) { rates[i].bitrate = il_rates[i].ieee * 5; rates[i].hw_value = i; /* Rate scaling will work on idxes */ rates[i].hw_value_short = i; rates[i].flags = 0; if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) { /* * If CCK != 1M then set short preamble rate flag. */ rates[i].flags |= (il_rates[i].plcp == RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; } } } /* * Acquire il->lock before calling this function ! */ void il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx) { il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8)); il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx); } void il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq, int tx_fifo_id, int scd_retry) { int txq_id = txq->q.id; /* Find out whether to activate Tx queue */ int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0; /* Set up and activate */ il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) | (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) | (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) | IL49_SCD_QUEUE_STTS_REG_MSK); txq->sched_retry = scd_retry; D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate", scd_retry ? "BA" : "AC", txq_id, tx_fifo_id); } static const struct ieee80211_ops il4965_mac_ops = { .tx = il4965_mac_tx, .wake_tx_queue = ieee80211_handle_wake_tx_queue, .start = il4965_mac_start, .stop = il4965_mac_stop, .add_interface = il_mac_add_interface, .remove_interface = il_mac_remove_interface, .change_interface = il_mac_change_interface, .config = il_mac_config, .configure_filter = il4965_configure_filter, .set_key = il4965_mac_set_key, .update_tkip_key = il4965_mac_update_tkip_key, .conf_tx = il_mac_conf_tx, .reset_tsf = il_mac_reset_tsf, .bss_info_changed = il_mac_bss_info_changed, .ampdu_action = il4965_mac_ampdu_action, .hw_scan = il_mac_hw_scan, .sta_add = il4965_mac_sta_add, .sta_remove = il_mac_sta_remove, .channel_switch = il4965_mac_channel_switch, .tx_last_beacon = il_mac_tx_last_beacon, .flush = il_mac_flush, }; static int il4965_init_drv(struct il_priv *il) { int ret; spin_lock_init(&il->sta_lock); spin_lock_init(&il->hcmd_lock); INIT_LIST_HEAD(&il->free_frames); mutex_init(&il->mutex); il->ieee_channels = NULL; il->ieee_rates = NULL; il->band = NL80211_BAND_2GHZ; il->iw_mode = NL80211_IFTYPE_STATION; il->current_ht_config.smps = IEEE80211_SMPS_STATIC; il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF; /* initialize force reset */ il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD; /* Choose which receivers/antennas to use */ if (il->ops->set_rxon_chain) il->ops->set_rxon_chain(il); il_init_scan_params(il); ret = il_init_channel_map(il); if (ret) { IL_ERR("initializing regulatory failed: %d\n", ret); goto err; } ret = il_init_geos(il); if (ret) { IL_ERR("initializing geos failed: %d\n", ret); goto err_free_channel_map; } il4965_init_hw_rates(il, il->ieee_rates); return 0; err_free_channel_map: il_free_channel_map(il); err: return ret; } static void il4965_uninit_drv(struct il_priv *il) { il_free_geos(il); il_free_channel_map(il); kfree(il->scan_cmd); } static void il4965_hw_detect(struct il_priv *il) { il->hw_rev = _il_rd(il, CSR_HW_REV); il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG); il->rev_id = il->pci_dev->revision; D_INFO("HW Revision ID = 0x%X\n", il->rev_id); } static const struct il_sensitivity_ranges il4965_sensitivity = { .min_nrg_cck = 97, .max_nrg_cck = 0, /* not used, set to 0 */ .auto_corr_min_ofdm = 85, .auto_corr_min_ofdm_mrc = 170, .auto_corr_min_ofdm_x1 = 105, .auto_corr_min_ofdm_mrc_x1 = 220, .auto_corr_max_ofdm = 120, .auto_corr_max_ofdm_mrc = 210, .auto_corr_max_ofdm_x1 = 140, .auto_corr_max_ofdm_mrc_x1 = 270, .auto_corr_min_cck = 125, .auto_corr_max_cck = 200, .auto_corr_min_cck_mrc = 200, .auto_corr_max_cck_mrc = 400, .nrg_th_cck = 100, .nrg_th_ofdm = 100, .barker_corr_th_min = 190, .barker_corr_th_min_mrc = 390, .nrg_th_cca = 62, }; static void il4965_set_hw_params(struct il_priv *il) { il->hw_params.bcast_id = IL4965_BROADCAST_ID; il->hw_params.max_rxq_size = RX_QUEUE_SIZE; il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG; if (il->cfg->mod_params->amsdu_size_8K) il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K); else il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K); il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL; if (il->cfg->mod_params->disable_11n) il->cfg->sku &= ~IL_SKU_N; if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES && il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES) il->cfg->num_of_queues = il->cfg->mod_params->num_of_queues; il->hw_params.max_txq_num = il->cfg->num_of_queues; il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM; il->hw_params.scd_bc_tbls_size = il->cfg->num_of_queues * sizeof(struct il4965_scd_bc_tbl); il->hw_params.tfd_size = sizeof(struct il_tfd); il->hw_params.max_stations = IL4965_STATION_COUNT; il->hw_params.max_data_size = IL49_RTC_DATA_SIZE; il->hw_params.max_inst_size = IL49_RTC_INST_SIZE; il->hw_params.max_bsm_size = BSM_SRAM_SIZE; il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ); il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR; il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant); il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant); il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant; il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant; il->hw_params.ct_kill_threshold = celsius_to_kelvin(CT_KILL_THRESHOLD_LEGACY); il->hw_params.sens = &il4965_sensitivity; il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS; } static int il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { int err = 0; struct il_priv *il; struct ieee80211_hw *hw; struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data); unsigned long flags; u16 pci_cmd; /************************ * 1. Allocating HW data ************************/ hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops); if (!hw) { err = -ENOMEM; goto out; } il = hw->priv; il->hw = hw; SET_IEEE80211_DEV(hw, &pdev->dev); D_INFO("*** LOAD DRIVER ***\n"); il->cfg = cfg; il->ops = &il4965_ops; #ifdef CONFIG_IWLEGACY_DEBUGFS il->debugfs_ops = &il4965_debugfs_ops; #endif il->pci_dev = pdev; il->inta_mask = CSR_INI_SET_MASK; /************************** * 2. Initializing PCI bus **************************/ pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM); if (pci_enable_device(pdev)) { err = -ENODEV; goto out_ieee80211_free_hw; } pci_set_master(pdev); err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36)); if (err) { err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); /* both attempts failed: */ if (err) { IL_WARN("No suitable DMA available.\n"); goto out_pci_disable_device; } } err = pci_request_regions(pdev, DRV_NAME); if (err) goto out_pci_disable_device; pci_set_drvdata(pdev, il); /*********************** * 3. Read REV register ***********************/ il->hw_base = pci_ioremap_bar(pdev, 0); if (!il->hw_base) { err = -ENODEV; goto out_pci_release_regions; } D_INFO("pci_resource_len = 0x%08llx\n", (unsigned long long)pci_resource_len(pdev, 0)); D_INFO("pci_resource_base = %p\n", il->hw_base); /* these spin locks will be used in apm_ops.init and EEPROM access * we should init now */ spin_lock_init(&il->reg_lock); spin_lock_init(&il->lock); /* * stop and reset the on-board processor just in case it is in a * strange state ... like being left stranded by a primary kernel * and this is now the kdump kernel trying to start up */ _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); il4965_hw_detect(il); IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev); /* We disable the RETRY_TIMEOUT register (0x41) to keep * PCI Tx retries from interfering with C3 CPU state */ pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); il4965_prepare_card_hw(il); if (!il->hw_ready) { IL_WARN("Failed, HW not ready\n"); err = -EIO; goto out_iounmap; } /***************** * 4. Read EEPROM *****************/ /* Read the EEPROM */ err = il_eeprom_init(il); if (err) { IL_ERR("Unable to init EEPROM\n"); goto out_iounmap; } err = il4965_eeprom_check_version(il); if (err) goto out_free_eeprom; /* extract MAC Address */ il4965_eeprom_get_mac(il, il->addresses[0].addr); D_INFO("MAC address: %pM\n", il->addresses[0].addr); il->hw->wiphy->addresses = il->addresses; il->hw->wiphy->n_addresses = 1; /************************ * 5. Setup HW constants ************************/ il4965_set_hw_params(il); /******************* * 6. Setup il *******************/ err = il4965_init_drv(il); if (err) goto out_free_eeprom; /* At this point both hw and il are initialized. */ /******************** * 7. Setup services ********************/ spin_lock_irqsave(&il->lock, flags); il_disable_interrupts(il); spin_unlock_irqrestore(&il->lock, flags); pci_enable_msi(il->pci_dev); err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il); if (err) { IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq); goto out_disable_msi; } il4965_setup_deferred_work(il); il4965_setup_handlers(il); /********************************************* * 8. Enable interrupts and read RFKILL state *********************************************/ /* enable rfkill interrupt: hw bug w/a */ pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd); if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd); } il_enable_rfkill_int(il); /* If platform's RF_KILL switch is NOT set to KILL */ if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(S_RFKILL, &il->status); else set_bit(S_RFKILL, &il->status); wiphy_rfkill_set_hw_state(il->hw->wiphy, test_bit(S_RFKILL, &il->status)); il_power_initialize(il); init_completion(&il->_4965.firmware_loading_complete); err = il4965_request_firmware(il, true); if (err) goto out_destroy_workqueue; return 0; out_destroy_workqueue: destroy_workqueue(il->workqueue); il->workqueue = NULL; free_irq(il->pci_dev->irq, il); out_disable_msi: pci_disable_msi(il->pci_dev); il4965_uninit_drv(il); out_free_eeprom: il_eeprom_free(il); out_iounmap: iounmap(il->hw_base); out_pci_release_regions: pci_release_regions(pdev); out_pci_disable_device: pci_disable_device(pdev); out_ieee80211_free_hw: ieee80211_free_hw(il->hw); out: return err; } static void il4965_pci_remove(struct pci_dev *pdev) { struct il_priv *il = pci_get_drvdata(pdev); unsigned long flags; if (!il) return; wait_for_completion(&il->_4965.firmware_loading_complete); D_INFO("*** UNLOAD DRIVER ***\n"); il_dbgfs_unregister(il); sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group); /* ieee80211_unregister_hw call wil cause il_mac_stop to * be called and il4965_down since we are removing the device * we need to set S_EXIT_PENDING bit. */ set_bit(S_EXIT_PENDING, &il->status); il_leds_exit(il); if (il->mac80211_registered) { ieee80211_unregister_hw(il->hw); il->mac80211_registered = 0; } else { il4965_down(il); } /* * Make sure device is reset to low power before unloading driver. * This may be redundant with il4965_down(), but there are paths to * run il4965_down() without calling apm_ops.stop(), and there are * paths to avoid running il4965_down() at all before leaving driver. * This (inexpensive) call *makes sure* device is reset. */ il_apm_stop(il); /* make sure we flush any pending irq or * tasklet for the driver */ spin_lock_irqsave(&il->lock, flags); il_disable_interrupts(il); spin_unlock_irqrestore(&il->lock, flags); il4965_synchronize_irq(il); il4965_dealloc_ucode_pci(il); if (il->rxq.bd) il4965_rx_queue_free(il, &il->rxq); il4965_hw_txq_ctx_free(il); il_eeprom_free(il); /*netif_stop_queue(dev); */ /* ieee80211_unregister_hw calls il_mac_stop, which flushes * il->workqueue... so we can't take down the workqueue * until now... */ destroy_workqueue(il->workqueue); il->workqueue = NULL; free_irq(il->pci_dev->irq, il); pci_disable_msi(il->pci_dev); iounmap(il->hw_base); pci_release_regions(pdev); pci_disable_device(pdev); il4965_uninit_drv(il); dev_kfree_skb(il->beacon_skb); ieee80211_free_hw(il->hw); } /* * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask * must be called under il->lock and mac access */ void il4965_txq_set_sched(struct il_priv *il, u32 mask) { il_wr_prph(il, IL49_SCD_TXFACT, mask); } /***************************************************************************** * * driver and module entry point * *****************************************************************************/ /* Hardware specific file defines the PCI IDs table for that hardware module */ static const struct pci_device_id il4965_hw_card_ids[] = { {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)}, {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)}, {0} }; MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids); static struct pci_driver il4965_driver = { .name = DRV_NAME, .id_table = il4965_hw_card_ids, .probe = il4965_pci_probe, .remove = il4965_pci_remove, .driver.pm = IL_LEGACY_PM_OPS, }; static int __init il4965_init(void) { int ret; pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n"); pr_info(DRV_COPYRIGHT "\n"); ret = il4965_rate_control_register(); if (ret) { pr_err("Unable to register rate control algorithm: %d\n", ret); return ret; } ret = pci_register_driver(&il4965_driver); if (ret) { pr_err("Unable to initialize PCI module\n"); goto error_register; } return ret; error_register: il4965_rate_control_unregister(); return ret; } static void __exit il4965_exit(void) { pci_unregister_driver(&il4965_driver); il4965_rate_control_unregister(); } module_exit(il4965_exit); module_init(il4965_init); #ifdef CONFIG_IWLEGACY_DEBUG module_param_named(debug, il_debug_level, uint, 0644); MODULE_PARM_DESC(debug, "debug output mask"); #endif module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, 0444); MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])"); module_param_named(queues_num, il4965_mod_params.num_of_queues, int, 0444); MODULE_PARM_DESC(queues_num, "number of hw queues."); module_param_named(11n_disable, il4965_mod_params.disable_11n, int, 0444); MODULE_PARM_DESC(11n_disable, "disable 11n functionality"); module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 0444); MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])"); module_param_named(fw_restart, il4965_mod_params.restart_fw, int, 0444); MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
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