| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Narsimhulu Musini | 1270 | 99.92% | 2 | 66.67% |
| Jason Yan | 1 | 0.08% | 1 | 33.33% |
| Total | 1271 | 3 |
/* * Copyright 2014 Cisco Systems, Inc. All rights reserved. * * This program is free software; you may redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef _SNIC_H_ #define _SNIC_H_ #include <linux/module.h> #include <linux/netdevice.h> #include <linux/workqueue.h> #include <linux/bitops.h> #include <linux/mempool.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi.h> #include <scsi/scsi_host.h> #include "snic_disc.h" #include "snic_io.h" #include "snic_res.h" #include "snic_trc.h" #include "snic_stats.h" #include "vnic_dev.h" #include "vnic_wq.h" #include "vnic_cq.h" #include "vnic_intr.h" #include "vnic_stats.h" #include "vnic_snic.h" #define SNIC_DRV_NAME "snic" #define SNIC_DRV_DESCRIPTION "Cisco SCSI NIC Driver" #define SNIC_DRV_VERSION "0.0.1.18" #define PFX SNIC_DRV_NAME ":" #define DFX SNIC_DRV_NAME "%d: " #define DESC_CLEAN_LOW_WATERMARK 8 #define SNIC_UCSM_DFLT_THROTTLE_CNT_BLD 16 /* UCSM default throttle count */ #define SNIC_MAX_IO_REQ 50 /* scsi_cmnd tag map entries */ #define SNIC_MIN_IO_REQ 8 /* Min IO throttle count */ #define SNIC_IO_LOCKS 64 /* IO locks: power of 2 */ #define SNIC_DFLT_QUEUE_DEPTH 32 /* Default Queue Depth */ #define SNIC_MAX_QUEUE_DEPTH 64 /* Max Queue Depth */ #define SNIC_DFLT_CMD_TIMEOUT 90 /* Extended tmo for FW */ /* * Tag bits used for special requests. */ #define SNIC_TAG_ABORT BIT(30) /* Tag indicating abort */ #define SNIC_TAG_DEV_RST BIT(29) /* Tag for device reset */ #define SNIC_TAG_IOCTL_DEV_RST BIT(28) /* Tag for User Device Reset */ #define SNIC_TAG_MASK (BIT(24) - 1) /* Mask for lookup */ #define SNIC_NO_TAG -1 /* * Command flags to identify the type of command and for other future use */ #define SNIC_NO_FLAGS 0 #define SNIC_IO_INITIALIZED BIT(0) #define SNIC_IO_ISSUED BIT(1) #define SNIC_IO_DONE BIT(2) #define SNIC_IO_REQ_NULL BIT(3) #define SNIC_IO_ABTS_PENDING BIT(4) #define SNIC_IO_ABORTED BIT(5) #define SNIC_IO_ABTS_ISSUED BIT(6) #define SNIC_IO_TERM_ISSUED BIT(7) #define SNIC_IO_ABTS_TIMEDOUT BIT(8) #define SNIC_IO_ABTS_TERM_DONE BIT(9) #define SNIC_IO_ABTS_TERM_REQ_NULL BIT(10) #define SNIC_IO_ABTS_TERM_TIMEDOUT BIT(11) #define SNIC_IO_INTERNAL_TERM_PENDING BIT(12) #define SNIC_IO_INTERNAL_TERM_ISSUED BIT(13) #define SNIC_DEVICE_RESET BIT(14) #define SNIC_DEV_RST_ISSUED BIT(15) #define SNIC_DEV_RST_TIMEDOUT BIT(16) #define SNIC_DEV_RST_ABTS_ISSUED BIT(17) #define SNIC_DEV_RST_TERM_ISSUED BIT(18) #define SNIC_DEV_RST_DONE BIT(19) #define SNIC_DEV_RST_REQ_NULL BIT(20) #define SNIC_DEV_RST_ABTS_DONE BIT(21) #define SNIC_DEV_RST_TERM_DONE BIT(22) #define SNIC_DEV_RST_ABTS_PENDING BIT(23) #define SNIC_DEV_RST_PENDING BIT(24) #define SNIC_DEV_RST_NOTSUP BIT(25) #define SNIC_SCSI_CLEANUP BIT(26) #define SNIC_HOST_RESET_ISSUED BIT(27) #define SNIC_HOST_RESET_CMD_TERM \ (SNIC_DEV_RST_NOTSUP | SNIC_SCSI_CLEANUP | SNIC_HOST_RESET_ISSUED) #define SNIC_ABTS_TIMEOUT 30000 /* msec */ #define SNIC_LUN_RESET_TIMEOUT 30000 /* msec */ #define SNIC_HOST_RESET_TIMEOUT 30000 /* msec */ /* * These are protected by the hashed req_lock. */ #define CMD_SP(Cmnd) \ (((struct snic_internal_io_state *)scsi_cmd_priv(Cmnd))->rqi) #define CMD_STATE(Cmnd) \ (((struct snic_internal_io_state *)scsi_cmd_priv(Cmnd))->state) #define CMD_ABTS_STATUS(Cmnd) \ (((struct snic_internal_io_state *)scsi_cmd_priv(Cmnd))->abts_status) #define CMD_LR_STATUS(Cmnd) \ (((struct snic_internal_io_state *)scsi_cmd_priv(Cmnd))->lr_status) #define CMD_FLAGS(Cmnd) \ (((struct snic_internal_io_state *)scsi_cmd_priv(Cmnd))->flags) #define SNIC_INVALID_CODE 0x100 /* Hdr Status val unused by firmware */ #define SNIC_MAX_TARGET 256 #define SNIC_FLAGS_NONE (0) /* snic module params */ extern unsigned int snic_max_qdepth; /* snic debugging */ extern unsigned int snic_log_level; #define SNIC_MAIN_LOGGING 0x1 #define SNIC_SCSI_LOGGING 0x2 #define SNIC_ISR_LOGGING 0x8 #define SNIC_DESC_LOGGING 0x10 #define SNIC_CHECK_LOGGING(LEVEL, CMD) \ do { \ if (unlikely(snic_log_level & LEVEL)) \ do { \ CMD; \ } while (0); \ } while (0) #define SNIC_MAIN_DBG(host, fmt, args...) \ SNIC_CHECK_LOGGING(SNIC_MAIN_LOGGING, \ shost_printk(KERN_INFO, host, fmt, ## args);) #define SNIC_SCSI_DBG(host, fmt, args...) \ SNIC_CHECK_LOGGING(SNIC_SCSI_LOGGING, \ shost_printk(KERN_INFO, host, fmt, ##args);) #define SNIC_DISC_DBG(host, fmt, args...) \ SNIC_CHECK_LOGGING(SNIC_SCSI_LOGGING, \ shost_printk(KERN_INFO, host, fmt, ##args);) #define SNIC_ISR_DBG(host, fmt, args...) \ SNIC_CHECK_LOGGING(SNIC_ISR_LOGGING, \ shost_printk(KERN_INFO, host, fmt, ##args);) #define SNIC_HOST_ERR(host, fmt, args...) \ shost_printk(KERN_ERR, host, fmt, ##args) #define SNIC_HOST_INFO(host, fmt, args...) \ shost_printk(KERN_INFO, host, fmt, ##args) #define SNIC_INFO(fmt, args...) \ pr_info(PFX fmt, ## args) #define SNIC_DBG(fmt, args...) \ pr_info(PFX fmt, ## args) #define SNIC_ERR(fmt, args...) \ pr_err(PFX fmt, ## args) #ifdef DEBUG #define SNIC_BUG_ON(EXPR) \ ({ \ if (EXPR) { \ SNIC_ERR("SNIC BUG(%s)\n", #EXPR); \ BUG_ON(EXPR); \ } \ }) #else #define SNIC_BUG_ON(EXPR) \ ({ \ if (EXPR) { \ SNIC_ERR("SNIC BUG(%s) at %s : %d\n", \ #EXPR, __func__, __LINE__); \ WARN_ON_ONCE(EXPR); \ } \ }) #endif /* Soft assert */ #define SNIC_ASSERT_NOT_IMPL(EXPR) \ ({ \ if (EXPR) {\ SNIC_INFO("Functionality not impl'ed at %s:%d\n", \ __func__, __LINE__); \ WARN_ON_ONCE(EXPR); \ } \ }) extern const char *snic_state_str[]; enum snic_intx_intr_index { SNIC_INTX_WQ_RQ_COPYWQ, SNIC_INTX_ERR, SNIC_INTX_NOTIFY, SNIC_INTX_INTR_MAX, }; enum snic_msix_intr_index { SNIC_MSIX_WQ, SNIC_MSIX_IO_CMPL, SNIC_MSIX_ERR_NOTIFY, SNIC_MSIX_INTR_MAX, }; #define SNIC_INTRHDLR_NAMSZ (2 * IFNAMSIZ) struct snic_msix_entry { int requested; char devname[SNIC_INTRHDLR_NAMSZ]; irqreturn_t (*isr)(int, void *); void *devid; }; enum snic_state { SNIC_INIT = 0, SNIC_ERROR, SNIC_ONLINE, SNIC_OFFLINE, SNIC_FWRESET, }; #define SNIC_WQ_MAX 1 #define SNIC_CQ_IO_CMPL_MAX 1 #define SNIC_CQ_MAX (SNIC_WQ_MAX + SNIC_CQ_IO_CMPL_MAX) /* firmware version information */ struct snic_fw_info { u32 fw_ver; u32 hid; /* u16 hid | u16 vnic id */ u32 max_concur_ios; /* max concurrent ios */ u32 max_sgs_per_cmd; /* max sgls per IO */ u32 max_io_sz; /* max io size supported */ u32 hba_cap; /* hba capabilities */ u32 max_tgts; /* max tgts supported */ u16 io_tmo; /* FW Extended timeout */ struct completion *wait; /* protected by snic lock*/ }; /* * snic_work item : defined to process asynchronous events */ struct snic_work { struct work_struct work; u16 ev_id; u64 *ev_data; }; /* * snic structure to represent SCSI vNIC */ struct snic { /* snic specific members */ struct list_head list; char name[IFNAMSIZ]; atomic_t state; spinlock_t snic_lock; struct completion *remove_wait; bool in_remove; bool stop_link_events; /* stop processing link events */ /* discovery related */ struct snic_disc disc; /* Scsi Host info */ struct Scsi_Host *shost; /* vnic related structures */ struct vnic_dev_bar bar0; struct vnic_stats *stats; unsigned long stats_time; unsigned long stats_reset_time; struct vnic_dev *vdev; /* hw resource info */ unsigned int wq_count; unsigned int cq_count; unsigned int intr_count; unsigned int err_intr_offset; int link_status; /* retrieved from svnic_dev_link_status() */ u32 link_down_cnt; /* pci related */ struct pci_dev *pdev; struct snic_msix_entry msix[SNIC_MSIX_INTR_MAX]; /* io related info */ mempool_t *req_pool[SNIC_REQ_MAX_CACHES]; /* (??) */ ____cacheline_aligned spinlock_t io_req_lock[SNIC_IO_LOCKS]; /* Maintain snic specific commands, cmds with no tag in spl_cmd_list */ ____cacheline_aligned spinlock_t spl_cmd_lock; struct list_head spl_cmd_list; unsigned int max_tag_id; atomic_t ios_inflight; /* io in flight counter */ struct vnic_snic_config config; struct work_struct link_work; /* firmware information */ struct snic_fw_info fwinfo; /* Work for processing Target related work */ struct work_struct tgt_work; /* Work for processing Discovery */ struct work_struct disc_work; /* stats related */ unsigned int reset_stats; atomic64_t io_cmpl_skip; struct snic_stats s_stats; /* Per SNIC driver stats */ /* platform specific */ #ifdef CONFIG_SCSI_SNIC_DEBUG_FS struct dentry *stats_host; /* Per snic debugfs root */ struct dentry *stats_file; /* Per snic debugfs file */ struct dentry *reset_stats_file;/* Per snic reset stats file */ #endif /* completion queue cache line section */ ____cacheline_aligned struct vnic_cq cq[SNIC_CQ_MAX]; /* work queue cache line section */ ____cacheline_aligned struct vnic_wq wq[SNIC_WQ_MAX]; spinlock_t wq_lock[SNIC_WQ_MAX]; /* interrupt resource cache line section */ ____cacheline_aligned struct vnic_intr intr[SNIC_MSIX_INTR_MAX]; }; /* end of snic structure */ /* * SNIC Driver's Global Data */ struct snic_global { struct list_head snic_list; spinlock_t snic_list_lock; struct kmem_cache *req_cache[SNIC_REQ_MAX_CACHES]; struct workqueue_struct *event_q; #ifdef CONFIG_SCSI_SNIC_DEBUG_FS /* debugfs related global data */ struct dentry *trc_root; struct dentry *stats_root; struct snic_trc trc ____cacheline_aligned; #endif }; extern struct snic_global *snic_glob; int snic_glob_init(void); void snic_glob_cleanup(void); extern struct workqueue_struct *snic_event_queue; extern struct device_attribute *snic_attrs[]; int snic_queuecommand(struct Scsi_Host *, struct scsi_cmnd *); int snic_abort_cmd(struct scsi_cmnd *); int snic_device_reset(struct scsi_cmnd *); int snic_host_reset(struct scsi_cmnd *); int snic_reset(struct Scsi_Host *, struct scsi_cmnd *); void snic_shutdown_scsi_cleanup(struct snic *); int snic_request_intr(struct snic *); void snic_free_intr(struct snic *); int snic_set_intr_mode(struct snic *); void snic_clear_intr_mode(struct snic *); int snic_fwcq_cmpl_handler(struct snic *, int); int snic_wq_cmpl_handler(struct snic *, int); void snic_free_wq_buf(struct vnic_wq *, struct vnic_wq_buf *); void snic_log_q_error(struct snic *); void snic_handle_link_event(struct snic *); void snic_handle_link(struct work_struct *); int snic_queue_exch_ver_req(struct snic *); void snic_io_exch_ver_cmpl_handler(struct snic *, struct snic_fw_req *); int snic_queue_wq_desc(struct snic *, void *os_buf, u16 len); void snic_handle_untagged_req(struct snic *, struct snic_req_info *); void snic_release_untagged_req(struct snic *, struct snic_req_info *); void snic_free_all_untagged_reqs(struct snic *); int snic_get_conf(struct snic *); void snic_set_state(struct snic *, enum snic_state); int snic_get_state(struct snic *); const char *snic_state_to_str(unsigned int); void snic_hex_dump(char *, char *, int); void snic_print_desc(const char *fn, char *os_buf, int len); const char *show_opcode_name(int val); #endif /* _SNIC_H */
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