| /* |
| * Driver for sTec s1120 PCIe SSDs. sTec was acquired in 2013 by HGST and HGST |
| * was acquired by Western Digital in 2012. |
| * |
| * Copyright 2012 sTec, Inc. |
| * Copyright (c) 2017 Western Digital Corporation or its affiliates. |
| * |
| * This file is part of the Linux kernel, and is made available under |
| * the terms of the GNU General Public License version 2. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/pci.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/blkdev.h> |
| #include <linux/blk-mq.h> |
| #include <linux/sched.h> |
| #include <linux/interrupt.h> |
| #include <linux/compiler.h> |
| #include <linux/workqueue.h> |
| #include <linux/delay.h> |
| #include <linux/time.h> |
| #include <linux/hdreg.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/completion.h> |
| #include <linux/scatterlist.h> |
| #include <linux/version.h> |
| #include <linux/err.h> |
| #include <linux/aer.h> |
| #include <linux/wait.h> |
| #include <linux/stringify.h> |
| #include <linux/slab_def.h> |
| #include <scsi/scsi.h> |
| #include <scsi/sg.h> |
| #include <linux/io.h> |
| #include <linux/uaccess.h> |
| #include <asm/unaligned.h> |
| |
| #include "skd_s1120.h" |
| |
| static int skd_dbg_level; |
| static int skd_isr_comp_limit = 4; |
| |
| #define SKD_ASSERT(expr) \ |
| do { \ |
| if (unlikely(!(expr))) { \ |
| pr_err("Assertion failed! %s,%s,%s,line=%d\n", \ |
| # expr, __FILE__, __func__, __LINE__); \ |
| } \ |
| } while (0) |
| |
| #define DRV_NAME "skd" |
| #define PFX DRV_NAME ": " |
| |
| MODULE_LICENSE("GPL"); |
| |
| MODULE_DESCRIPTION("STEC s1120 PCIe SSD block driver"); |
| |
| #define PCI_VENDOR_ID_STEC 0x1B39 |
| #define PCI_DEVICE_ID_S1120 0x0001 |
| |
| #define SKD_FUA_NV (1 << 1) |
| #define SKD_MINORS_PER_DEVICE 16 |
| |
| #define SKD_MAX_QUEUE_DEPTH 200u |
| |
| #define SKD_PAUSE_TIMEOUT (5 * 1000) |
| |
| #define SKD_N_FITMSG_BYTES (512u) |
| #define SKD_MAX_REQ_PER_MSG 14 |
| |
| #define SKD_N_SPECIAL_FITMSG_BYTES (128u) |
| |
| /* SG elements are 32 bytes, so we can make this 4096 and still be under the |
| * 128KB limit. That allows 4096*4K = 16M xfer size |
| */ |
| #define SKD_N_SG_PER_REQ_DEFAULT 256u |
| |
| #define SKD_N_COMPLETION_ENTRY 256u |
| #define SKD_N_READ_CAP_BYTES (8u) |
| |
| #define SKD_N_INTERNAL_BYTES (512u) |
| |
| #define SKD_SKCOMP_SIZE \ |
| ((sizeof(struct fit_completion_entry_v1) + \ |
| sizeof(struct fit_comp_error_info)) * SKD_N_COMPLETION_ENTRY) |
| |
| /* 5 bits of uniqifier, 0xF800 */ |
| #define SKD_ID_TABLE_MASK (3u << 8u) |
| #define SKD_ID_RW_REQUEST (0u << 8u) |
| #define SKD_ID_INTERNAL (1u << 8u) |
| #define SKD_ID_FIT_MSG (3u << 8u) |
| #define SKD_ID_SLOT_MASK 0x00FFu |
| #define SKD_ID_SLOT_AND_TABLE_MASK 0x03FFu |
| |
| #define SKD_N_MAX_SECTORS 2048u |
| |
| #define SKD_MAX_RETRIES 2u |
| |
| #define SKD_TIMER_SECONDS(seconds) (seconds) |
| #define SKD_TIMER_MINUTES(minutes) ((minutes) * (60)) |
| |
| #define INQ_STD_NBYTES 36 |
| |
| enum skd_drvr_state { |
| SKD_DRVR_STATE_LOAD, |
| SKD_DRVR_STATE_IDLE, |
| SKD_DRVR_STATE_BUSY, |
| SKD_DRVR_STATE_STARTING, |
| SKD_DRVR_STATE_ONLINE, |
| SKD_DRVR_STATE_PAUSING, |
| SKD_DRVR_STATE_PAUSED, |
| SKD_DRVR_STATE_RESTARTING, |
| SKD_DRVR_STATE_RESUMING, |
| SKD_DRVR_STATE_STOPPING, |
| SKD_DRVR_STATE_FAULT, |
| SKD_DRVR_STATE_DISAPPEARED, |
| SKD_DRVR_STATE_PROTOCOL_MISMATCH, |
| SKD_DRVR_STATE_BUSY_ERASE, |
| SKD_DRVR_STATE_BUSY_SANITIZE, |
| SKD_DRVR_STATE_BUSY_IMMINENT, |
| SKD_DRVR_STATE_WAIT_BOOT, |
| SKD_DRVR_STATE_SYNCING, |
| }; |
| |
| #define SKD_WAIT_BOOT_TIMO SKD_TIMER_SECONDS(90u) |
| #define SKD_STARTING_TIMO SKD_TIMER_SECONDS(8u) |
| #define SKD_RESTARTING_TIMO SKD_TIMER_MINUTES(4u) |
| #define SKD_BUSY_TIMO SKD_TIMER_MINUTES(20u) |
| #define SKD_STARTED_BUSY_TIMO SKD_TIMER_SECONDS(60u) |
| #define SKD_START_WAIT_SECONDS 90u |
| |
| enum skd_req_state { |
| SKD_REQ_STATE_IDLE, |
| SKD_REQ_STATE_SETUP, |
| SKD_REQ_STATE_BUSY, |
| SKD_REQ_STATE_COMPLETED, |
| SKD_REQ_STATE_TIMEOUT, |
| }; |
| |
| enum skd_check_status_action { |
| SKD_CHECK_STATUS_REPORT_GOOD, |
| SKD_CHECK_STATUS_REPORT_SMART_ALERT, |
| SKD_CHECK_STATUS_REQUEUE_REQUEST, |
| SKD_CHECK_STATUS_REPORT_ERROR, |
| SKD_CHECK_STATUS_BUSY_IMMINENT, |
| }; |
| |
| struct skd_msg_buf { |
| struct fit_msg_hdr fmh; |
| struct skd_scsi_request scsi[SKD_MAX_REQ_PER_MSG]; |
| }; |
| |
| struct skd_fitmsg_context { |
| u32 id; |
| |
| u32 length; |
| |
| struct skd_msg_buf *msg_buf; |
| dma_addr_t mb_dma_address; |
| }; |
| |
| struct skd_request_context { |
| enum skd_req_state state; |
| |
| u16 id; |
| u32 fitmsg_id; |
| |
| u8 flush_cmd; |
| |
| enum dma_data_direction data_dir; |
| struct scatterlist *sg; |
| u32 n_sg; |
| u32 sg_byte_count; |
| |
| struct fit_sg_descriptor *sksg_list; |
| dma_addr_t sksg_dma_address; |
| |
| struct fit_completion_entry_v1 completion; |
| |
| struct fit_comp_error_info err_info; |
| |
| blk_status_t status; |
| }; |
| |
| struct skd_special_context { |
| struct skd_request_context req; |
| |
| void *data_buf; |
| dma_addr_t db_dma_address; |
| |
| struct skd_msg_buf *msg_buf; |
| dma_addr_t mb_dma_address; |
| }; |
| |
| typedef enum skd_irq_type { |
| SKD_IRQ_LEGACY, |
| SKD_IRQ_MSI, |
| SKD_IRQ_MSIX |
| } skd_irq_type_t; |
| |
| #define SKD_MAX_BARS 2 |
| |
| struct skd_device { |
| void __iomem *mem_map[SKD_MAX_BARS]; |
| resource_size_t mem_phys[SKD_MAX_BARS]; |
| u32 mem_size[SKD_MAX_BARS]; |
| |
| struct skd_msix_entry *msix_entries; |
| |
| struct pci_dev *pdev; |
| int pcie_error_reporting_is_enabled; |
| |
| spinlock_t lock; |
| struct gendisk *disk; |
| struct blk_mq_tag_set tag_set; |
| struct request_queue *queue; |
| struct skd_fitmsg_context *skmsg; |
| struct device *class_dev; |
| int gendisk_on; |
| int sync_done; |
| |
| u32 devno; |
| u32 major; |
| char isr_name[30]; |
| |
| enum skd_drvr_state state; |
| u32 drive_state; |
| |
| u32 cur_max_queue_depth; |
| u32 queue_low_water_mark; |
| u32 dev_max_queue_depth; |
| |
| u32 num_fitmsg_context; |
| u32 num_req_context; |
| |
| struct skd_fitmsg_context *skmsg_table; |
| |
| struct skd_special_context internal_skspcl; |
| u32 read_cap_blocksize; |
| u32 read_cap_last_lba; |
| int read_cap_is_valid; |
| int inquiry_is_valid; |
| u8 inq_serial_num[13]; /*12 chars plus null term */ |
| |
| u8 skcomp_cycle; |
| u32 skcomp_ix; |
| struct kmem_cache *msgbuf_cache; |
| struct kmem_cache *sglist_cache; |
| struct kmem_cache *databuf_cache; |
| struct fit_completion_entry_v1 *skcomp_table; |
| struct fit_comp_error_info *skerr_table; |
| dma_addr_t cq_dma_address; |
| |
| wait_queue_head_t waitq; |
| |
| struct timer_list timer; |
| u32 timer_countdown; |
| u32 timer_substate; |
| |
| int sgs_per_request; |
| u32 last_mtd; |
| |
| u32 proto_ver; |
| |
| int dbg_level; |
| u32 connect_time_stamp; |
| int connect_retries; |
| #define SKD_MAX_CONNECT_RETRIES 16 |
| u32 drive_jiffies; |
| |
| u32 timo_slot; |
| |
| struct work_struct start_queue; |
| struct work_struct completion_worker; |
| }; |
| |
| #define SKD_WRITEL(DEV, VAL, OFF) skd_reg_write32(DEV, VAL, OFF) |
| #define SKD_READL(DEV, OFF) skd_reg_read32(DEV, OFF) |
| #define SKD_WRITEQ(DEV, VAL, OFF) skd_reg_write64(DEV, VAL, OFF) |
| |
| static inline u32 skd_reg_read32(struct skd_device *skdev, u32 offset) |
| { |
| u32 val = readl(skdev->mem_map[1] + offset); |
| |
| if (unlikely(skdev->dbg_level >= 2)) |
| dev_dbg(&skdev->pdev->dev, "offset %x = %x\n", offset, val); |
| return val; |
| } |
| |
| static inline void skd_reg_write32(struct skd_device *skdev, u32 val, |
| u32 offset) |
| { |
| writel(val, skdev->mem_map[1] + offset); |
| if (unlikely(skdev->dbg_level >= 2)) |
| dev_dbg(&skdev->pdev->dev, "offset %x = %x\n", offset, val); |
| } |
| |
| static inline void skd_reg_write64(struct skd_device *skdev, u64 val, |
| u32 offset) |
| { |
| writeq(val, skdev->mem_map[1] + offset); |
| if (unlikely(skdev->dbg_level >= 2)) |
| dev_dbg(&skdev->pdev->dev, "offset %x = %016llx\n", offset, |
| val); |
| } |
| |
| |
| #define SKD_IRQ_DEFAULT SKD_IRQ_MSIX |
| static int skd_isr_type = SKD_IRQ_DEFAULT; |
| |
| module_param(skd_isr_type, int, 0444); |
| MODULE_PARM_DESC(skd_isr_type, "Interrupt type capability." |
| " (0==legacy, 1==MSI, 2==MSI-X, default==1)"); |
| |
| #define SKD_MAX_REQ_PER_MSG_DEFAULT 1 |
| static int skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; |
| |
| module_param(skd_max_req_per_msg, int, 0444); |
| MODULE_PARM_DESC(skd_max_req_per_msg, |
| "Maximum SCSI requests packed in a single message." |
| " (1-" __stringify(SKD_MAX_REQ_PER_MSG) ", default==1)"); |
| |
| #define SKD_MAX_QUEUE_DEPTH_DEFAULT 64 |
| #define SKD_MAX_QUEUE_DEPTH_DEFAULT_STR "64" |
| static int skd_max_queue_depth = SKD_MAX_QUEUE_DEPTH_DEFAULT; |
| |
| module_param(skd_max_queue_depth, int, 0444); |
| MODULE_PARM_DESC(skd_max_queue_depth, |
| "Maximum SCSI requests issued to s1120." |
| " (1-200, default==" SKD_MAX_QUEUE_DEPTH_DEFAULT_STR ")"); |
| |
| static int skd_sgs_per_request = SKD_N_SG_PER_REQ_DEFAULT; |
| module_param(skd_sgs_per_request, int, 0444); |
| MODULE_PARM_DESC(skd_sgs_per_request, |
| "Maximum SG elements per block request." |
| " (1-4096, default==256)"); |
| |
| static int skd_max_pass_thru = 1; |
| module_param(skd_max_pass_thru, int, 0444); |
| MODULE_PARM_DESC(skd_max_pass_thru, |
| "Maximum SCSI pass-thru at a time. IGNORED"); |
| |
| module_param(skd_dbg_level, int, 0444); |
| MODULE_PARM_DESC(skd_dbg_level, "s1120 debug level (0,1,2)"); |
| |
| module_param(skd_isr_comp_limit, int, 0444); |
| MODULE_PARM_DESC(skd_isr_comp_limit, "s1120 isr comp limit (0=none) default=4"); |
| |
| /* Major device number dynamically assigned. */ |
| static u32 skd_major; |
| |
| static void skd_destruct(struct skd_device *skdev); |
| static const struct block_device_operations skd_blockdev_ops; |
| static void skd_send_fitmsg(struct skd_device *skdev, |
| struct skd_fitmsg_context *skmsg); |
| static void skd_send_special_fitmsg(struct skd_device *skdev, |
| struct skd_special_context *skspcl); |
| static bool skd_preop_sg_list(struct skd_device *skdev, |
| struct skd_request_context *skreq); |
| static void skd_postop_sg_list(struct skd_device *skdev, |
| struct skd_request_context *skreq); |
| |
| static void skd_restart_device(struct skd_device *skdev); |
| static int skd_quiesce_dev(struct skd_device *skdev); |
| static int skd_unquiesce_dev(struct skd_device *skdev); |
| static void skd_disable_interrupts(struct skd_device *skdev); |
| static void skd_isr_fwstate(struct skd_device *skdev); |
| static void skd_recover_requests(struct skd_device *skdev); |
| static void skd_soft_reset(struct skd_device *skdev); |
| |
| const char *skd_drive_state_to_str(int state); |
| const char *skd_skdev_state_to_str(enum skd_drvr_state state); |
| static void skd_log_skdev(struct skd_device *skdev, const char *event); |
| static void skd_log_skreq(struct skd_device *skdev, |
| struct skd_request_context *skreq, const char *event); |
| |
| /* |
| ***************************************************************************** |
| * READ/WRITE REQUESTS |
| ***************************************************************************** |
| */ |
| static void skd_inc_in_flight(struct request *rq, void *data, bool reserved) |
| { |
| int *count = data; |
| |
| count++; |
| } |
| |
| static int skd_in_flight(struct skd_device *skdev) |
| { |
| int count = 0; |
| |
| blk_mq_tagset_busy_iter(&skdev->tag_set, skd_inc_in_flight, &count); |
| |
| return count; |
| } |
| |
| static void |
| skd_prep_rw_cdb(struct skd_scsi_request *scsi_req, |
| int data_dir, unsigned lba, |
| unsigned count) |
| { |
| if (data_dir == READ) |
| scsi_req->cdb[0] = READ_10; |
| else |
| scsi_req->cdb[0] = WRITE_10; |
| |
| scsi_req->cdb[1] = 0; |
| scsi_req->cdb[2] = (lba & 0xff000000) >> 24; |
| scsi_req->cdb[3] = (lba & 0xff0000) >> 16; |
| scsi_req->cdb[4] = (lba & 0xff00) >> 8; |
| scsi_req->cdb[5] = (lba & 0xff); |
| scsi_req->cdb[6] = 0; |
| scsi_req->cdb[7] = (count & 0xff00) >> 8; |
| scsi_req->cdb[8] = count & 0xff; |
| scsi_req->cdb[9] = 0; |
| } |
| |
| static void |
| skd_prep_zerosize_flush_cdb(struct skd_scsi_request *scsi_req, |
| struct skd_request_context *skreq) |
| { |
| skreq->flush_cmd = 1; |
| |
| scsi_req->cdb[0] = SYNCHRONIZE_CACHE; |
| scsi_req->cdb[1] = 0; |
| scsi_req->cdb[2] = 0; |
| scsi_req->cdb[3] = 0; |
| scsi_req->cdb[4] = 0; |
| scsi_req->cdb[5] = 0; |
| scsi_req->cdb[6] = 0; |
| scsi_req->cdb[7] = 0; |
| scsi_req->cdb[8] = 0; |
| scsi_req->cdb[9] = 0; |
| } |
| |
| /* |
| * Return true if and only if all pending requests should be failed. |
| */ |
| static bool skd_fail_all(struct request_queue *q) |
| { |
| struct skd_device *skdev = q->queuedata; |
| |
| SKD_ASSERT(skdev->state != SKD_DRVR_STATE_ONLINE); |
| |
| skd_log_skdev(skdev, "req_not_online"); |
| switch (skdev->state) { |
| case SKD_DRVR_STATE_PAUSING: |
| case SKD_DRVR_STATE_PAUSED: |
| case SKD_DRVR_STATE_STARTING: |
| case SKD_DRVR_STATE_RESTARTING: |
| case SKD_DRVR_STATE_WAIT_BOOT: |
| /* In case of starting, we haven't started the queue, |
| * so we can't get here... but requests are |
| * possibly hanging out waiting for us because we |
| * reported the dev/skd0 already. They'll wait |
| * forever if connect doesn't complete. |
| * What to do??? delay dev/skd0 ?? |
| */ |
| case SKD_DRVR_STATE_BUSY: |
| case SKD_DRVR_STATE_BUSY_IMMINENT: |
| case SKD_DRVR_STATE_BUSY_ERASE: |
| return false; |
| |
| case SKD_DRVR_STATE_BUSY_SANITIZE: |
| case SKD_DRVR_STATE_STOPPING: |
| case SKD_DRVR_STATE_SYNCING: |
| case SKD_DRVR_STATE_FAULT: |
| case SKD_DRVR_STATE_DISAPPEARED: |
| default: |
| return true; |
| } |
| } |
| |
| static blk_status_t skd_mq_queue_rq(struct blk_mq_hw_ctx *hctx, |
| const struct blk_mq_queue_data *mqd) |
| { |
| struct request *const req = mqd->rq; |
| struct request_queue *const q = req->q; |
| struct skd_device *skdev = q->queuedata; |
| struct skd_fitmsg_context *skmsg; |
| struct fit_msg_hdr *fmh; |
| const u32 tag = blk_mq_unique_tag(req); |
| struct skd_request_context *const skreq = blk_mq_rq_to_pdu(req); |
| struct skd_scsi_request *scsi_req; |
| unsigned long flags = 0; |
| const u32 lba = blk_rq_pos(req); |
| const u32 count = blk_rq_sectors(req); |
| const int data_dir = rq_data_dir(req); |
| |
| if (unlikely(skdev->state != SKD_DRVR_STATE_ONLINE)) |
| return skd_fail_all(q) ? BLK_STS_IOERR : BLK_STS_RESOURCE; |
| |
| blk_mq_start_request(req); |
| |
| WARN_ONCE(tag >= skd_max_queue_depth, "%#x > %#x (nr_requests = %lu)\n", |
| tag, skd_max_queue_depth, q->nr_requests); |
| |
| SKD_ASSERT(skreq->state == SKD_REQ_STATE_IDLE); |
| |
| dev_dbg(&skdev->pdev->dev, |
| "new req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n", req, lba, |
| lba, count, count, data_dir); |
| |
| skreq->id = tag + SKD_ID_RW_REQUEST; |
| skreq->flush_cmd = 0; |
| skreq->n_sg = 0; |
| skreq->sg_byte_count = 0; |
| |
| skreq->fitmsg_id = 0; |
| |
| skreq->data_dir = data_dir == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
| |
| if (req->bio && !skd_preop_sg_list(skdev, skreq)) { |
| dev_dbg(&skdev->pdev->dev, "error Out\n"); |
| skreq->status = BLK_STS_RESOURCE; |
| blk_mq_complete_request(req); |
| return BLK_STS_OK; |
| } |
| |
| dma_sync_single_for_device(&skdev->pdev->dev, skreq->sksg_dma_address, |
| skreq->n_sg * |
| sizeof(struct fit_sg_descriptor), |
| DMA_TO_DEVICE); |
| |
| /* Either a FIT msg is in progress or we have to start one. */ |
| if (skd_max_req_per_msg == 1) { |
| skmsg = NULL; |
| } else { |
| spin_lock_irqsave(&skdev->lock, flags); |
| skmsg = skdev->skmsg; |
| } |
| if (!skmsg) { |
| skmsg = &skdev->skmsg_table[tag]; |
| skdev->skmsg = skmsg; |
| |
| /* Initialize the FIT msg header */ |
| fmh = &skmsg->msg_buf->fmh; |
| memset(fmh, 0, sizeof(*fmh)); |
| fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; |
| skmsg->length = sizeof(*fmh); |
| } else { |
| fmh = &skmsg->msg_buf->fmh; |
| } |
| |
| skreq->fitmsg_id = skmsg->id; |
| |
| scsi_req = &skmsg->msg_buf->scsi[fmh->num_protocol_cmds_coalesced]; |
| memset(scsi_req, 0, sizeof(*scsi_req)); |
| |
| scsi_req->hdr.tag = skreq->id; |
| scsi_req->hdr.sg_list_dma_address = |
| cpu_to_be64(skreq->sksg_dma_address); |
| |
| if (req_op(req) == REQ_OP_FLUSH) { |
| skd_prep_zerosize_flush_cdb(scsi_req, skreq); |
| SKD_ASSERT(skreq->flush_cmd == 1); |
| } else { |
| skd_prep_rw_cdb(scsi_req, data_dir, lba, count); |
| } |
| |
| if (req->cmd_flags & REQ_FUA) |
| scsi_req->cdb[1] |= SKD_FUA_NV; |
| |
| scsi_req->hdr.sg_list_len_bytes = cpu_to_be32(skreq->sg_byte_count); |
| |
| /* Complete resource allocations. */ |
| skreq->state = SKD_REQ_STATE_BUSY; |
| |
| skmsg->length += sizeof(struct skd_scsi_request); |
| fmh->num_protocol_cmds_coalesced++; |
| |
| dev_dbg(&skdev->pdev->dev, "req=0x%x busy=%d\n", skreq->id, |
| skd_in_flight(skdev)); |
| |
| /* |
| * If the FIT msg buffer is full send it. |
| */ |
| if (skd_max_req_per_msg == 1) { |
| skd_send_fitmsg(skdev, skmsg); |
| } else { |
| if (mqd->last || |
| fmh->num_protocol_cmds_coalesced >= skd_max_req_per_msg) { |
| skd_send_fitmsg(skdev, skmsg); |
| skdev->skmsg = NULL; |
| } |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| } |
| |
| return BLK_STS_OK; |
| } |
| |
| static enum blk_eh_timer_return skd_timed_out(struct request *req, |
| bool reserved) |
| { |
| struct skd_device *skdev = req->q->queuedata; |
| |
| dev_err(&skdev->pdev->dev, "request with tag %#x timed out\n", |
| blk_mq_unique_tag(req)); |
| |
| return BLK_EH_RESET_TIMER; |
| } |
| |
| static void skd_complete_rq(struct request *req) |
| { |
| struct skd_request_context *skreq = blk_mq_rq_to_pdu(req); |
| |
| blk_mq_end_request(req, skreq->status); |
| } |
| |
| static bool skd_preop_sg_list(struct skd_device *skdev, |
| struct skd_request_context *skreq) |
| { |
| struct request *req = blk_mq_rq_from_pdu(skreq); |
| struct scatterlist *sgl = &skreq->sg[0], *sg; |
| int n_sg; |
| int i; |
| |
| skreq->sg_byte_count = 0; |
| |
| WARN_ON_ONCE(skreq->data_dir != DMA_TO_DEVICE && |
| skreq->data_dir != DMA_FROM_DEVICE); |
| |
| n_sg = blk_rq_map_sg(skdev->queue, req, sgl); |
| if (n_sg <= 0) |
| return false; |
| |
| /* |
| * Map scatterlist to PCI bus addresses. |
| * Note PCI might change the number of entries. |
| */ |
| n_sg = pci_map_sg(skdev->pdev, sgl, n_sg, skreq->data_dir); |
| if (n_sg <= 0) |
| return false; |
| |
| SKD_ASSERT(n_sg <= skdev->sgs_per_request); |
| |
| skreq->n_sg = n_sg; |
| |
| for_each_sg(sgl, sg, n_sg, i) { |
| struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; |
| u32 cnt = sg_dma_len(sg); |
| uint64_t dma_addr = sg_dma_address(sg); |
| |
| sgd->control = FIT_SGD_CONTROL_NOT_LAST; |
| sgd->byte_count = cnt; |
| skreq->sg_byte_count += cnt; |
| sgd->host_side_addr = dma_addr; |
| sgd->dev_side_addr = 0; |
| } |
| |
| skreq->sksg_list[n_sg - 1].next_desc_ptr = 0LL; |
| skreq->sksg_list[n_sg - 1].control = FIT_SGD_CONTROL_LAST; |
| |
| if (unlikely(skdev->dbg_level > 1)) { |
| dev_dbg(&skdev->pdev->dev, |
| "skreq=%x sksg_list=%p sksg_dma=%llx\n", |
| skreq->id, skreq->sksg_list, skreq->sksg_dma_address); |
| for (i = 0; i < n_sg; i++) { |
| struct fit_sg_descriptor *sgd = &skreq->sksg_list[i]; |
| |
| dev_dbg(&skdev->pdev->dev, |
| " sg[%d] count=%u ctrl=0x%x addr=0x%llx next=0x%llx\n", |
| i, sgd->byte_count, sgd->control, |
| sgd->host_side_addr, sgd->next_desc_ptr); |
| } |
| } |
| |
| return true; |
| } |
| |
| static void skd_postop_sg_list(struct skd_device *skdev, |
| struct skd_request_context *skreq) |
| { |
| /* |
| * restore the next ptr for next IO request so we |
| * don't have to set it every time. |
| */ |
| skreq->sksg_list[skreq->n_sg - 1].next_desc_ptr = |
| skreq->sksg_dma_address + |
| ((skreq->n_sg) * sizeof(struct fit_sg_descriptor)); |
| pci_unmap_sg(skdev->pdev, &skreq->sg[0], skreq->n_sg, skreq->data_dir); |
| } |
| |
| /* |
| ***************************************************************************** |
| * TIMER |
| ***************************************************************************** |
| */ |
| |
| static void skd_timer_tick_not_online(struct skd_device *skdev); |
| |
| static void skd_start_queue(struct work_struct *work) |
| { |
| struct skd_device *skdev = container_of(work, typeof(*skdev), |
| start_queue); |
| |
| /* |
| * Although it is safe to call blk_start_queue() from interrupt |
| * context, blk_mq_start_hw_queues() must not be called from |
| * interrupt context. |
| */ |
| blk_mq_start_hw_queues(skdev->queue); |
| } |
| |
| static void skd_timer_tick(ulong arg) |
| { |
| struct skd_device *skdev = (struct skd_device *)arg; |
| unsigned long reqflags; |
| u32 state; |
| |
| if (skdev->state == SKD_DRVR_STATE_FAULT) |
| /* The driver has declared fault, and we want it to |
| * stay that way until driver is reloaded. |
| */ |
| return; |
| |
| spin_lock_irqsave(&skdev->lock, reqflags); |
| |
| state = SKD_READL(skdev, FIT_STATUS); |
| state &= FIT_SR_DRIVE_STATE_MASK; |
| if (state != skdev->drive_state) |
| skd_isr_fwstate(skdev); |
| |
| if (skdev->state != SKD_DRVR_STATE_ONLINE) |
| skd_timer_tick_not_online(skdev); |
| |
| mod_timer(&skdev->timer, (jiffies + HZ)); |
| |
| spin_unlock_irqrestore(&skdev->lock, reqflags); |
| } |
| |
| static void skd_timer_tick_not_online(struct skd_device *skdev) |
| { |
| switch (skdev->state) { |
| case SKD_DRVR_STATE_IDLE: |
| case SKD_DRVR_STATE_LOAD: |
| break; |
| case SKD_DRVR_STATE_BUSY_SANITIZE: |
| dev_dbg(&skdev->pdev->dev, |
| "drive busy sanitize[%x], driver[%x]\n", |
| skdev->drive_state, skdev->state); |
| /* If we've been in sanitize for 3 seconds, we figure we're not |
| * going to get anymore completions, so recover requests now |
| */ |
| if (skdev->timer_countdown > 0) { |
| skdev->timer_countdown--; |
| return; |
| } |
| skd_recover_requests(skdev); |
| break; |
| |
| case SKD_DRVR_STATE_BUSY: |
| case SKD_DRVR_STATE_BUSY_IMMINENT: |
| case SKD_DRVR_STATE_BUSY_ERASE: |
| dev_dbg(&skdev->pdev->dev, "busy[%x], countdown=%d\n", |
| skdev->state, skdev->timer_countdown); |
| if (skdev->timer_countdown > 0) { |
| skdev->timer_countdown--; |
| return; |
| } |
| dev_dbg(&skdev->pdev->dev, |
| "busy[%x], timedout=%d, restarting device.", |
| skdev->state, skdev->timer_countdown); |
| skd_restart_device(skdev); |
| break; |
| |
| case SKD_DRVR_STATE_WAIT_BOOT: |
| case SKD_DRVR_STATE_STARTING: |
| if (skdev->timer_countdown > 0) { |
| skdev->timer_countdown--; |
| return; |
| } |
| /* For now, we fault the drive. Could attempt resets to |
| * revcover at some point. */ |
| skdev->state = SKD_DRVR_STATE_FAULT; |
| |
| dev_err(&skdev->pdev->dev, "DriveFault Connect Timeout (%x)\n", |
| skdev->drive_state); |
| |
| /*start the queue so we can respond with error to requests */ |
| /* wakeup anyone waiting for startup complete */ |
| schedule_work(&skdev->start_queue); |
| skdev->gendisk_on = -1; |
| wake_up_interruptible(&skdev->waitq); |
| break; |
| |
| case SKD_DRVR_STATE_ONLINE: |
| /* shouldn't get here. */ |
| break; |
| |
| case SKD_DRVR_STATE_PAUSING: |
| case SKD_DRVR_STATE_PAUSED: |
| break; |
| |
| case SKD_DRVR_STATE_RESTARTING: |
| if (skdev->timer_countdown > 0) { |
| skdev->timer_countdown--; |
| return; |
| } |
| /* For now, we fault the drive. Could attempt resets to |
| * revcover at some point. */ |
| skdev->state = SKD_DRVR_STATE_FAULT; |
| dev_err(&skdev->pdev->dev, |
| "DriveFault Reconnect Timeout (%x)\n", |
| skdev->drive_state); |
| |
| /* |
| * Recovering does two things: |
| * 1. completes IO with error |
| * 2. reclaims dma resources |
| * When is it safe to recover requests? |
| * - if the drive state is faulted |
| * - if the state is still soft reset after out timeout |
| * - if the drive registers are dead (state = FF) |
| * If it is "unsafe", we still need to recover, so we will |
| * disable pci bus mastering and disable our interrupts. |
| */ |
| |
| if ((skdev->drive_state == FIT_SR_DRIVE_SOFT_RESET) || |
| (skdev->drive_state == FIT_SR_DRIVE_FAULT) || |
| (skdev->drive_state == FIT_SR_DRIVE_STATE_MASK)) |
| /* It never came out of soft reset. Try to |
| * recover the requests and then let them |
| * fail. This is to mitigate hung processes. */ |
| skd_recover_requests(skdev); |
| else { |
| dev_err(&skdev->pdev->dev, "Disable BusMaster (%x)\n", |
| skdev->drive_state); |
| pci_disable_device(skdev->pdev); |
| skd_disable_interrupts(skdev); |
| skd_recover_requests(skdev); |
| } |
| |
| /*start the queue so we can respond with error to requests */ |
| /* wakeup anyone waiting for startup complete */ |
| schedule_work(&skdev->start_queue); |
| skdev->gendisk_on = -1; |
| wake_up_interruptible(&skdev->waitq); |
| break; |
| |
| case SKD_DRVR_STATE_RESUMING: |
| case SKD_DRVR_STATE_STOPPING: |
| case SKD_DRVR_STATE_SYNCING: |
| case SKD_DRVR_STATE_FAULT: |
| case SKD_DRVR_STATE_DISAPPEARED: |
| default: |
| break; |
| } |
| } |
| |
| static int skd_start_timer(struct skd_device *skdev) |
| { |
| int rc; |
| |
| setup_timer(&skdev->timer, skd_timer_tick, (ulong)skdev); |
| |
| rc = mod_timer(&skdev->timer, (jiffies + HZ)); |
| if (rc) |
| dev_err(&skdev->pdev->dev, "failed to start timer %d\n", rc); |
| return rc; |
| } |
| |
| static void skd_kill_timer(struct skd_device *skdev) |
| { |
| del_timer_sync(&skdev->timer); |
| } |
| |
| /* |
| ***************************************************************************** |
| * INTERNAL REQUESTS -- generated by driver itself |
| ***************************************************************************** |
| */ |
| |
| static int skd_format_internal_skspcl(struct skd_device *skdev) |
| { |
| struct skd_special_context *skspcl = &skdev->internal_skspcl; |
| struct fit_sg_descriptor *sgd = &skspcl->req.sksg_list[0]; |
| struct fit_msg_hdr *fmh; |
| uint64_t dma_address; |
| struct skd_scsi_request *scsi; |
| |
| fmh = &skspcl->msg_buf->fmh; |
| fmh->protocol_id = FIT_PROTOCOL_ID_SOFIT; |
| fmh->num_protocol_cmds_coalesced = 1; |
| |
| scsi = &skspcl->msg_buf->scsi[0]; |
| memset(scsi, 0, sizeof(*scsi)); |
| dma_address = skspcl->req.sksg_dma_address; |
| scsi->hdr.sg_list_dma_address = cpu_to_be64(dma_address); |
| skspcl->req.n_sg = 1; |
| sgd->control = FIT_SGD_CONTROL_LAST; |
| sgd->byte_count = 0; |
| sgd->host_side_addr = skspcl->db_dma_address; |
| sgd->dev_side_addr = 0; |
| sgd->next_desc_ptr = 0LL; |
| |
| return 1; |
| } |
| |
| #define WR_BUF_SIZE SKD_N_INTERNAL_BYTES |
| |
| static void skd_send_internal_skspcl(struct skd_device *skdev, |
| struct skd_special_context *skspcl, |
| u8 opcode) |
| { |
| struct fit_sg_descriptor *sgd = &skspcl->req.sksg_list[0]; |
| struct skd_scsi_request *scsi; |
| unsigned char *buf = skspcl->data_buf; |
| int i; |
| |
| if (skspcl->req.state != SKD_REQ_STATE_IDLE) |
| /* |
| * A refresh is already in progress. |
| * Just wait for it to finish. |
| */ |
| return; |
| |
| skspcl->req.state = SKD_REQ_STATE_BUSY; |
| |
| scsi = &skspcl->msg_buf->scsi[0]; |
| scsi->hdr.tag = skspcl->req.id; |
| |
| memset(scsi->cdb, 0, sizeof(scsi->cdb)); |
| |
| switch (opcode) { |
| case TEST_UNIT_READY: |
| scsi->cdb[0] = TEST_UNIT_READY; |
| sgd->byte_count = 0; |
| scsi->hdr.sg_list_len_bytes = 0; |
| break; |
| |
| case READ_CAPACITY: |
| scsi->cdb[0] = READ_CAPACITY; |
| sgd->byte_count = SKD_N_READ_CAP_BYTES; |
| scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); |
| break; |
| |
| case INQUIRY: |
| scsi->cdb[0] = INQUIRY; |
| scsi->cdb[1] = 0x01; /* evpd */ |
| scsi->cdb[2] = 0x80; /* serial number page */ |
| scsi->cdb[4] = 0x10; |
| sgd->byte_count = 16; |
| scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); |
| break; |
| |
| case SYNCHRONIZE_CACHE: |
| scsi->cdb[0] = SYNCHRONIZE_CACHE; |
| sgd->byte_count = 0; |
| scsi->hdr.sg_list_len_bytes = 0; |
| break; |
| |
| case WRITE_BUFFER: |
| scsi->cdb[0] = WRITE_BUFFER; |
| scsi->cdb[1] = 0x02; |
| scsi->cdb[7] = (WR_BUF_SIZE & 0xFF00) >> 8; |
| scsi->cdb[8] = WR_BUF_SIZE & 0xFF; |
| sgd->byte_count = WR_BUF_SIZE; |
| scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); |
| /* fill incrementing byte pattern */ |
| for (i = 0; i < sgd->byte_count; i++) |
| buf[i] = i & 0xFF; |
| break; |
| |
| case READ_BUFFER: |
| scsi->cdb[0] = READ_BUFFER; |
| scsi->cdb[1] = 0x02; |
| scsi->cdb[7] = (WR_BUF_SIZE & 0xFF00) >> 8; |
| scsi->cdb[8] = WR_BUF_SIZE & 0xFF; |
| sgd->byte_count = WR_BUF_SIZE; |
| scsi->hdr.sg_list_len_bytes = cpu_to_be32(sgd->byte_count); |
| memset(skspcl->data_buf, 0, sgd->byte_count); |
| break; |
| |
| default: |
| SKD_ASSERT("Don't know what to send"); |
| return; |
| |
| } |
| skd_send_special_fitmsg(skdev, skspcl); |
| } |
| |
| static void skd_refresh_device_data(struct skd_device *skdev) |
| { |
| struct skd_special_context *skspcl = &skdev->internal_skspcl; |
| |
| skd_send_internal_skspcl(skdev, skspcl, TEST_UNIT_READY); |
| } |
| |
| static int skd_chk_read_buf(struct skd_device *skdev, |
| struct skd_special_context *skspcl) |
| { |
| unsigned char *buf = skspcl->data_buf; |
| int i; |
| |
| /* check for incrementing byte pattern */ |
| for (i = 0; i < WR_BUF_SIZE; i++) |
| if (buf[i] != (i & 0xFF)) |
| return 1; |
| |
| return 0; |
| } |
| |
| static void skd_log_check_status(struct skd_device *skdev, u8 status, u8 key, |
| u8 code, u8 qual, u8 fruc) |
| { |
| /* If the check condition is of special interest, log a message */ |
| if ((status == SAM_STAT_CHECK_CONDITION) && (key == 0x02) |
| && (code == 0x04) && (qual == 0x06)) { |
| dev_err(&skdev->pdev->dev, |
| "*** LOST_WRITE_DATA ERROR *** key/asc/ascq/fruc %02x/%02x/%02x/%02x\n", |
| key, code, qual, fruc); |
| } |
| } |
| |
| static void skd_complete_internal(struct skd_device *skdev, |
| struct fit_completion_entry_v1 *skcomp, |
| struct fit_comp_error_info *skerr, |
| struct skd_special_context *skspcl) |
| { |
| u8 *buf = skspcl->data_buf; |
| u8 status; |
| int i; |
| struct skd_scsi_request *scsi = &skspcl->msg_buf->scsi[0]; |
| |
| lockdep_assert_held(&skdev->lock); |
| |
| SKD_ASSERT(skspcl == &skdev->internal_skspcl); |
| |
| dev_dbg(&skdev->pdev->dev, "complete internal %x\n", scsi->cdb[0]); |
| |
| dma_sync_single_for_cpu(&skdev->pdev->dev, |
| skspcl->db_dma_address, |
| skspcl->req.sksg_list[0].byte_count, |
| DMA_BIDIRECTIONAL); |
| |
| skspcl->req.completion = *skcomp; |
| skspcl->req.state = SKD_REQ_STATE_IDLE; |
| |
| status = skspcl->req.completion.status; |
| |
| skd_log_check_status(skdev, status, skerr->key, skerr->code, |
| skerr->qual, skerr->fruc); |
| |
| switch (scsi->cdb[0]) { |
| case TEST_UNIT_READY: |
| if (status == SAM_STAT_GOOD) |
| skd_send_internal_skspcl(skdev, skspcl, WRITE_BUFFER); |
| else if ((status == SAM_STAT_CHECK_CONDITION) && |
| (skerr->key == MEDIUM_ERROR)) |
| skd_send_internal_skspcl(skdev, skspcl, WRITE_BUFFER); |
| else { |
| if (skdev->state == SKD_DRVR_STATE_STOPPING) { |
| dev_dbg(&skdev->pdev->dev, |
| "TUR failed, don't send anymore state 0x%x\n", |
| skdev->state); |
| return; |
| } |
| dev_dbg(&skdev->pdev->dev, |
| "**** TUR failed, retry skerr\n"); |
| skd_send_internal_skspcl(skdev, skspcl, |
| TEST_UNIT_READY); |
| } |
| break; |
| |
| case WRITE_BUFFER: |
| if (status == SAM_STAT_GOOD) |
| skd_send_internal_skspcl(skdev, skspcl, READ_BUFFER); |
| else { |
| if (skdev->state == SKD_DRVR_STATE_STOPPING) { |
| dev_dbg(&skdev->pdev->dev, |
| "write buffer failed, don't send anymore state 0x%x\n", |
| skdev->state); |
| return; |
| } |
| dev_dbg(&skdev->pdev->dev, |
| "**** write buffer failed, retry skerr\n"); |
| skd_send_internal_skspcl(skdev, skspcl, |
| TEST_UNIT_READY); |
| } |
| break; |
| |
| case READ_BUFFER: |
| if (status == SAM_STAT_GOOD) { |
| if (skd_chk_read_buf(skdev, skspcl) == 0) |
| skd_send_internal_skspcl(skdev, skspcl, |
| READ_CAPACITY); |
| else { |
| dev_err(&skdev->pdev->dev, |
| "*** W/R Buffer mismatch %d ***\n", |
| skdev->connect_retries); |
| if (skdev->connect_retries < |
| SKD_MAX_CONNECT_RETRIES) { |
| skdev->connect_retries++; |
| skd_soft_reset(skdev); |
| } else { |
| dev_err(&skdev->pdev->dev, |
| "W/R Buffer Connect Error\n"); |
| return; |
| } |
| } |
| |
| } else { |
| if (skdev->state == SKD_DRVR_STATE_STOPPING) { |
| dev_dbg(&skdev->pdev->dev, |
| "read buffer failed, don't send anymore state 0x%x\n", |
| skdev->state); |
| return; |
| } |
| dev_dbg(&skdev->pdev->dev, |
| "**** read buffer failed, retry skerr\n"); |
| skd_send_internal_skspcl(skdev, skspcl, |
| TEST_UNIT_READY); |
| } |
| break; |
| |
| case READ_CAPACITY: |
| skdev->read_cap_is_valid = 0; |
| if (status == SAM_STAT_GOOD) { |
| skdev->read_cap_last_lba = |
| (buf[0] << 24) | (buf[1] << 16) | |
| (buf[2] << 8) | buf[3]; |
| skdev->read_cap_blocksize = |
| (buf[4] << 24) | (buf[5] << 16) | |
| (buf[6] << 8) | buf[7]; |
| |
| dev_dbg(&skdev->pdev->dev, "last lba %d, bs %d\n", |
| skdev->read_cap_last_lba, |
| skdev->read_cap_blocksize); |
| |
| set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); |
| |
| skdev->read_cap_is_valid = 1; |
| |
| skd_send_internal_skspcl(skdev, skspcl, INQUIRY); |
| } else if ((status == SAM_STAT_CHECK_CONDITION) && |
| (skerr->key == MEDIUM_ERROR)) { |
| skdev->read_cap_last_lba = ~0; |
| set_capacity(skdev->disk, skdev->read_cap_last_lba + 1); |
| dev_dbg(&skdev->pdev->dev, "**** MEDIUM ERROR caused READCAP to fail, ignore failure and continue to inquiry\n"); |
| skd_send_internal_skspcl(skdev, skspcl, INQUIRY); |
| } else { |
| dev_dbg(&skdev->pdev->dev, "**** READCAP failed, retry TUR\n"); |
| skd_send_internal_skspcl(skdev, skspcl, |
| TEST_UNIT_READY); |
| } |
| break; |
| |
| case INQUIRY: |
| skdev->inquiry_is_valid = 0; |
| if (status == SAM_STAT_GOOD) { |
| skdev->inquiry_is_valid = 1; |
| |
| for (i = 0; i < 12; i++) |
| skdev->inq_serial_num[i] = buf[i + 4]; |
| skdev->inq_serial_num[12] = 0; |
| } |
| |
| if (skd_unquiesce_dev(skdev) < 0) |
| dev_dbg(&skdev->pdev->dev, "**** failed, to ONLINE device\n"); |
| /* connection is complete */ |
| skdev->connect_retries = 0; |
| break; |
| |
| case SYNCHRONIZE_CACHE: |
| if (status == SAM_STAT_GOOD) |
| skdev->sync_done = 1; |
| else |
| skdev->sync_done = -1; |
| wake_up_interruptible(&skdev->waitq); |
| break; |
| |
| default: |
| SKD_ASSERT("we didn't send this"); |
| } |
| } |
| |
| /* |
| ***************************************************************************** |
| * FIT MESSAGES |
| ***************************************************************************** |
| */ |
| |
| static void skd_send_fitmsg(struct skd_device *skdev, |
| struct skd_fitmsg_context *skmsg) |
| { |
| u64 qcmd; |
| |
| dev_dbg(&skdev->pdev->dev, "dma address 0x%llx, busy=%d\n", |
| skmsg->mb_dma_address, skd_in_flight(skdev)); |
| dev_dbg(&skdev->pdev->dev, "msg_buf %p\n", skmsg->msg_buf); |
| |
| qcmd = skmsg->mb_dma_address; |
| qcmd |= FIT_QCMD_QID_NORMAL; |
| |
| if (unlikely(skdev->dbg_level > 1)) { |
| u8 *bp = (u8 *)skmsg->msg_buf; |
| int i; |
| for (i = 0; i < skmsg->length; i += 8) { |
| dev_dbg(&skdev->pdev->dev, "msg[%2d] %8ph\n", i, |
| &bp[i]); |
| if (i == 0) |
| i = 64 - 8; |
| } |
| } |
| |
| if (skmsg->length > 256) |
| qcmd |= FIT_QCMD_MSGSIZE_512; |
| else if (skmsg->length > 128) |
| qcmd |= FIT_QCMD_MSGSIZE_256; |
| else if (skmsg->length > 64) |
| qcmd |= FIT_QCMD_MSGSIZE_128; |
| else |
| /* |
| * This makes no sense because the FIT msg header is |
| * 64 bytes. If the msg is only 64 bytes long it has |
| * no payload. |
| */ |
| qcmd |= FIT_QCMD_MSGSIZE_64; |
| |
| dma_sync_single_for_device(&skdev->pdev->dev, skmsg->mb_dma_address, |
| skmsg->length, DMA_TO_DEVICE); |
| |
| /* Make sure skd_msg_buf is written before the doorbell is triggered. */ |
| smp_wmb(); |
| |
| SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); |
| } |
| |
| static void skd_send_special_fitmsg(struct skd_device *skdev, |
| struct skd_special_context *skspcl) |
| { |
| u64 qcmd; |
| |
| WARN_ON_ONCE(skspcl->req.n_sg != 1); |
| |
| if (unlikely(skdev->dbg_level > 1)) { |
| u8 *bp = (u8 *)skspcl->msg_buf; |
| int i; |
| |
| for (i = 0; i < SKD_N_SPECIAL_FITMSG_BYTES; i += 8) { |
| dev_dbg(&skdev->pdev->dev, " spcl[%2d] %8ph\n", i, |
| &bp[i]); |
| if (i == 0) |
| i = 64 - 8; |
| } |
| |
| dev_dbg(&skdev->pdev->dev, |
| "skspcl=%p id=%04x sksg_list=%p sksg_dma=%llx\n", |
| skspcl, skspcl->req.id, skspcl->req.sksg_list, |
| skspcl->req.sksg_dma_address); |
| for (i = 0; i < skspcl->req.n_sg; i++) { |
| struct fit_sg_descriptor *sgd = |
| &skspcl->req.sksg_list[i]; |
| |
| dev_dbg(&skdev->pdev->dev, |
| " sg[%d] count=%u ctrl=0x%x addr=0x%llx next=0x%llx\n", |
| i, sgd->byte_count, sgd->control, |
| sgd->host_side_addr, sgd->next_desc_ptr); |
| } |
| } |
| |
| /* |
| * Special FIT msgs are always 128 bytes: a 64-byte FIT hdr |
| * and one 64-byte SSDI command. |
| */ |
| qcmd = skspcl->mb_dma_address; |
| qcmd |= FIT_QCMD_QID_NORMAL + FIT_QCMD_MSGSIZE_128; |
| |
| dma_sync_single_for_device(&skdev->pdev->dev, skspcl->mb_dma_address, |
| SKD_N_SPECIAL_FITMSG_BYTES, DMA_TO_DEVICE); |
| dma_sync_single_for_device(&skdev->pdev->dev, |
| skspcl->req.sksg_dma_address, |
| 1 * sizeof(struct fit_sg_descriptor), |
| DMA_TO_DEVICE); |
| dma_sync_single_for_device(&skdev->pdev->dev, |
| skspcl->db_dma_address, |
| skspcl->req.sksg_list[0].byte_count, |
| DMA_BIDIRECTIONAL); |
| |
| /* Make sure skd_msg_buf is written before the doorbell is triggered. */ |
| smp_wmb(); |
| |
| SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND); |
| } |
| |
| /* |
| ***************************************************************************** |
| * COMPLETION QUEUE |
| ***************************************************************************** |
| */ |
| |
| static void skd_complete_other(struct skd_device *skdev, |
| struct fit_completion_entry_v1 *skcomp, |
| struct fit_comp_error_info *skerr); |
| |
| struct sns_info { |
| u8 type; |
| u8 stat; |
| u8 key; |
| u8 asc; |
| u8 ascq; |
| u8 mask; |
| enum skd_check_status_action action; |
| }; |
| |
| static struct sns_info skd_chkstat_table[] = { |
| /* Good */ |
| { 0x70, 0x02, RECOVERED_ERROR, 0, 0, 0x1c, |
| SKD_CHECK_STATUS_REPORT_GOOD }, |
| |
| /* Smart alerts */ |
| { 0x70, 0x02, NO_SENSE, 0x0B, 0x00, 0x1E, /* warnings */ |
| SKD_CHECK_STATUS_REPORT_SMART_ALERT }, |
| { 0x70, 0x02, NO_SENSE, 0x5D, 0x00, 0x1E, /* thresholds */ |
| SKD_CHECK_STATUS_REPORT_SMART_ALERT }, |
| { 0x70, 0x02, RECOVERED_ERROR, 0x0B, 0x01, 0x1F, /* temperature over trigger */ |
| SKD_CHECK_STATUS_REPORT_SMART_ALERT }, |
| |
| /* Retry (with limits) */ |
| { 0x70, 0x02, 0x0B, 0, 0, 0x1C, /* This one is for DMA ERROR */ |
| SKD_CHECK_STATUS_REQUEUE_REQUEST }, |
| { 0x70, 0x02, 0x06, 0x0B, 0x00, 0x1E, /* warnings */ |
| SKD_CHECK_STATUS_REQUEUE_REQUEST }, |
| { 0x70, 0x02, 0x06, 0x5D, 0x00, 0x1E, /* thresholds */ |
| SKD_CHECK_STATUS_REQUEUE_REQUEST }, |
| { 0x70, 0x02, 0x06, 0x80, 0x30, 0x1F, /* backup power */ |
| SKD_CHECK_STATUS_REQUEUE_REQUEST }, |
| |
| /* Busy (or about to be) */ |
| { 0x70, 0x02, 0x06, 0x3f, 0x01, 0x1F, /* fw changed */ |
| SKD_CHECK_STATUS_BUSY_IMMINENT }, |
| }; |
| |
| /* |
| * Look up status and sense data to decide how to handle the error |
| * from the device. |
| * mask says which fields must match e.g., mask=0x18 means check |
| * type and stat, ignore key, asc, ascq. |
| */ |
| |
| static enum skd_check_status_action |
| skd_check_status(struct skd_device *skdev, |
| u8 cmp_status, struct fit_comp_error_info *skerr) |
| { |
| int i; |
| |
| dev_err(&skdev->pdev->dev, "key/asc/ascq/fruc %02x/%02x/%02x/%02x\n", |
| skerr->key, skerr->code, skerr->qual, skerr->fruc); |
| |
| dev_dbg(&skdev->pdev->dev, |
| "stat: t=%02x stat=%02x k=%02x c=%02x q=%02x fruc=%02x\n", |
| skerr->type, cmp_status, skerr->key, skerr->code, skerr->qual, |
| skerr->fruc); |
| |
| /* Does the info match an entry in the good category? */ |
| for (i = 0; i < ARRAY_SIZE(skd_chkstat_table); i++) { |
| struct sns_info *sns = &skd_chkstat_table[i]; |
| |
| if (sns->mask & 0x10) |
| if (skerr->type != sns->type) |
| continue; |
| |
| if (sns->mask & 0x08) |
| if (cmp_status != sns->stat) |
| continue; |
| |
| if (sns->mask & 0x04) |
| if (skerr->key != sns->key) |
| continue; |
| |
| if (sns->mask & 0x02) |
| if (skerr->code != sns->asc) |
| continue; |
| |
| if (sns->mask & 0x01) |
| if (skerr->qual != sns->ascq) |
| continue; |
| |
| if (sns->action == SKD_CHECK_STATUS_REPORT_SMART_ALERT) { |
| dev_err(&skdev->pdev->dev, |
| "SMART Alert: sense key/asc/ascq %02x/%02x/%02x\n", |
| skerr->key, skerr->code, skerr->qual); |
| } |
| return sns->action; |
| } |
| |
| /* No other match, so nonzero status means error, |
| * zero status means good |
| */ |
| if (cmp_status) { |
| dev_dbg(&skdev->pdev->dev, "status check: error\n"); |
| return SKD_CHECK_STATUS_REPORT_ERROR; |
| } |
| |
| dev_dbg(&skdev->pdev->dev, "status check good default\n"); |
| return SKD_CHECK_STATUS_REPORT_GOOD; |
| } |
| |
| static void skd_resolve_req_exception(struct skd_device *skdev, |
| struct skd_request_context *skreq, |
| struct request *req) |
| { |
| u8 cmp_status = skreq->completion.status; |
| |
| switch (skd_check_status(skdev, cmp_status, &skreq->err_info)) { |
| case SKD_CHECK_STATUS_REPORT_GOOD: |
| case SKD_CHECK_STATUS_REPORT_SMART_ALERT: |
| skreq->status = BLK_STS_OK; |
| blk_mq_complete_request(req); |
| break; |
| |
| case SKD_CHECK_STATUS_BUSY_IMMINENT: |
| skd_log_skreq(skdev, skreq, "retry(busy)"); |
| blk_requeue_request(skdev->queue, req); |
| dev_info(&skdev->pdev->dev, "drive BUSY imminent\n"); |
| skdev->state = SKD_DRVR_STATE_BUSY_IMMINENT; |
| skdev->timer_countdown = SKD_TIMER_MINUTES(20); |
| skd_quiesce_dev(skdev); |
| break; |
| |
| case SKD_CHECK_STATUS_REQUEUE_REQUEST: |
| if ((unsigned long) ++req->special < SKD_MAX_RETRIES) { |
| skd_log_skreq(skdev, skreq, "retry"); |
| blk_requeue_request(skdev->queue, req); |
| break; |
| } |
| /* fall through */ |
| |
| case SKD_CHECK_STATUS_REPORT_ERROR: |
| default: |
| skreq->status = BLK_STS_IOERR; |
| blk_mq_complete_request(req); |
| break; |
| } |
| } |
| |
| static void skd_release_skreq(struct skd_device *skdev, |
| struct skd_request_context *skreq) |
| { |
| /* |
| * Reclaim the skd_request_context |
| */ |
| skreq->state = SKD_REQ_STATE_IDLE; |
| } |
| |
| static int skd_isr_completion_posted(struct skd_device *skdev, |
| int limit, int *enqueued) |
| { |
| struct fit_completion_entry_v1 *skcmp; |
| struct fit_comp_error_info *skerr; |
| u16 req_id; |
| u32 tag; |
| u16 hwq = 0; |
| struct request *rq; |
| struct skd_request_context *skreq; |
| u16 cmp_cntxt; |
| u8 cmp_status; |
| u8 cmp_cycle; |
| u32 cmp_bytes; |
| int rc = 0; |
| int processed = 0; |
| |
| lockdep_assert_held(&skdev->lock); |
| |
| for (;; ) { |
| SKD_ASSERT(skdev->skcomp_ix < SKD_N_COMPLETION_ENTRY); |
| |
| skcmp = &skdev->skcomp_table[skdev->skcomp_ix]; |
| cmp_cycle = skcmp->cycle; |
| cmp_cntxt = skcmp->tag; |
| cmp_status = skcmp->status; |
| cmp_bytes = be32_to_cpu(skcmp->num_returned_bytes); |
| |
| skerr = &skdev->skerr_table[skdev->skcomp_ix]; |
| |
| dev_dbg(&skdev->pdev->dev, |
| "cycle=%d ix=%d got cycle=%d cmdctxt=0x%x stat=%d busy=%d rbytes=0x%x proto=%d\n", |
| skdev->skcomp_cycle, skdev->skcomp_ix, cmp_cycle, |
| cmp_cntxt, cmp_status, skd_in_flight(skdev), |
| cmp_bytes, skdev->proto_ver); |
| |
| if (cmp_cycle != skdev->skcomp_cycle) { |
| dev_dbg(&skdev->pdev->dev, "end of completions\n"); |
| break; |
| } |
| /* |
| * Update the completion queue head index and possibly |
| * the completion cycle count. 8-bit wrap-around. |
| */ |
| skdev->skcomp_ix++; |
| if (skdev->skcomp_ix >= SKD_N_COMPLETION_ENTRY) { |
| skdev->skcomp_ix = 0; |
| skdev->skcomp_cycle++; |
| } |
| |
| /* |
| * The command context is a unique 32-bit ID. The low order |
| * bits help locate the request. The request is usually a |
| * r/w request (see skd_start() above) or a special request. |
| */ |
| req_id = cmp_cntxt; |
| tag = req_id & SKD_ID_SLOT_AND_TABLE_MASK; |
| |
| /* Is this other than a r/w request? */ |
| if (tag >= skdev->num_req_context) { |
| /* |
| * This is not a completion for a r/w request. |
| */ |
| WARN_ON_ONCE(blk_mq_tag_to_rq(skdev->tag_set.tags[hwq], |
| tag)); |
| skd_complete_other(skdev, skcmp, skerr); |
| continue; |
| } |
| |
| rq = blk_mq_tag_to_rq(skdev->tag_set.tags[hwq], tag); |
| if (WARN(!rq, "No request for tag %#x -> %#x\n", cmp_cntxt, |
| tag)) |
| continue; |
| skreq = blk_mq_rq_to_pdu(rq); |
| |
| /* |
| * Make sure the request ID for the slot matches. |
| */ |
| if (skreq->id != req_id) { |
| dev_err(&skdev->pdev->dev, |
| "Completion mismatch comp_id=0x%04x skreq=0x%04x new=0x%04x\n", |
| req_id, skreq->id, cmp_cntxt); |
| |
| continue; |
| } |
| |
| SKD_ASSERT(skreq->state == SKD_REQ_STATE_BUSY); |
| |
| skreq->completion = *skcmp; |
| if (unlikely(cmp_status == SAM_STAT_CHECK_CONDITION)) { |
| skreq->err_info = *skerr; |
| skd_log_check_status(skdev, cmp_status, skerr->key, |
| skerr->code, skerr->qual, |
| skerr->fruc); |
| } |
| /* Release DMA resources for the request. */ |
| if (skreq->n_sg > 0) |
| skd_postop_sg_list(skdev, skreq); |
| |
| skd_release_skreq(skdev, skreq); |
| |
| /* |
| * Capture the outcome and post it back to the native request. |
| */ |
| if (likely(cmp_status == SAM_STAT_GOOD)) { |
| skreq->status = BLK_STS_OK; |
| blk_mq_complete_request(rq); |
| } else { |
| skd_resolve_req_exception(skdev, skreq, rq); |
| } |
| |
| /* skd_isr_comp_limit equal zero means no limit */ |
| if (limit) { |
| if (++processed >= limit) { |
| rc = 1; |
| break; |
| } |
| } |
| } |
| |
| if (skdev->state == SKD_DRVR_STATE_PAUSING && |
| skd_in_flight(skdev) == 0) { |
| skdev->state = SKD_DRVR_STATE_PAUSED; |
| wake_up_interruptible(&skdev->waitq); |
| } |
| |
| return rc; |
| } |
| |
| static void skd_complete_other(struct skd_device *skdev, |
| struct fit_completion_entry_v1 *skcomp, |
| struct fit_comp_error_info *skerr) |
| { |
| u32 req_id = 0; |
| u32 req_table; |
| u32 req_slot; |
| struct skd_special_context *skspcl; |
| |
| lockdep_assert_held(&skdev->lock); |
| |
| req_id = skcomp->tag; |
| req_table = req_id & SKD_ID_TABLE_MASK; |
| req_slot = req_id & SKD_ID_SLOT_MASK; |
| |
| dev_dbg(&skdev->pdev->dev, "table=0x%x id=0x%x slot=%d\n", req_table, |
| req_id, req_slot); |
| |
| /* |
| * Based on the request id, determine how to dispatch this completion. |
| * This swich/case is finding the good cases and forwarding the |
| * completion entry. Errors are reported below the switch. |
| */ |
| switch (req_table) { |
| case SKD_ID_RW_REQUEST: |
| /* |
| * The caller, skd_isr_completion_posted() above, |
| * handles r/w requests. The only way we get here |
| * is if the req_slot is out of bounds. |
| */ |
| break; |
| |
| case SKD_ID_INTERNAL: |
| if (req_slot == 0) { |
| skspcl = &skdev->internal_skspcl; |
| if (skspcl->req.id == req_id && |
| skspcl->req.state == SKD_REQ_STATE_BUSY) { |
| skd_complete_internal(skdev, |
| skcomp, skerr, skspcl); |
| return; |
| } |
| } |
| break; |
| |
| case SKD_ID_FIT_MSG: |
| /* |
| * These id's should never appear in a completion record. |
| */ |
| break; |
| |
| default: |
| /* |
| * These id's should never appear anywhere; |
| */ |
| break; |
| } |
| |
| /* |
| * If we get here it is a bad or stale id. |
| */ |
| } |
| |
| static void skd_reset_skcomp(struct skd_device *skdev) |
| { |
| memset(skdev->skcomp_table, 0, SKD_SKCOMP_SIZE); |
| |
| skdev->skcomp_ix = 0; |
| skdev->skcomp_cycle = 1; |
| } |
| |
| /* |
| ***************************************************************************** |
| * INTERRUPTS |
| ***************************************************************************** |
| */ |
| static void skd_completion_worker(struct work_struct *work) |
| { |
| struct skd_device *skdev = |
| container_of(work, struct skd_device, completion_worker); |
| unsigned long flags; |
| int flush_enqueued = 0; |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| |
| /* |
| * pass in limit=0, which means no limit.. |
| * process everything in compq |
| */ |
| skd_isr_completion_posted(skdev, 0, &flush_enqueued); |
| schedule_work(&skdev->start_queue); |
| |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| } |
| |
| static void skd_isr_msg_from_dev(struct skd_device *skdev); |
| |
| static irqreturn_t |
| skd_isr(int irq, void *ptr) |
| { |
| struct skd_device *skdev = ptr; |
| u32 intstat; |
| u32 ack; |
| int rc = 0; |
| int deferred = 0; |
| int flush_enqueued = 0; |
| |
| spin_lock(&skdev->lock); |
| |
| for (;; ) { |
| intstat = SKD_READL(skdev, FIT_INT_STATUS_HOST); |
| |
| ack = FIT_INT_DEF_MASK; |
| ack &= intstat; |
| |
| dev_dbg(&skdev->pdev->dev, "intstat=0x%x ack=0x%x\n", intstat, |
| ack); |
| |
| /* As long as there is an int pending on device, keep |
| * running loop. When none, get out, but if we've never |
| * done any processing, call completion handler? |
| */ |
| if (ack == 0) { |
| /* No interrupts on device, but run the completion |
| * processor anyway? |
| */ |
| if (rc == 0) |
| if (likely (skdev->state |
| == SKD_DRVR_STATE_ONLINE)) |
| deferred = 1; |
| break; |
| } |
| |
| rc = IRQ_HANDLED; |
| |
| SKD_WRITEL(skdev, ack, FIT_INT_STATUS_HOST); |
| |
| if (likely((skdev->state != SKD_DRVR_STATE_LOAD) && |
| (skdev->state != SKD_DRVR_STATE_STOPPING))) { |
| if (intstat & FIT_ISH_COMPLETION_POSTED) { |
| /* |
| * If we have already deferred completion |
| * processing, don't bother running it again |
| */ |
| if (deferred == 0) |
| deferred = |
| skd_isr_completion_posted(skdev, |
| skd_isr_comp_limit, &flush_enqueued); |
| } |
| |
| if (intstat & FIT_ISH_FW_STATE_CHANGE) { |
| skd_isr_fwstate(skdev); |
| if (skdev->state == SKD_DRVR_STATE_FAULT || |
| skdev->state == |
| SKD_DRVR_STATE_DISAPPEARED) { |
| spin_unlock(&skdev->lock); |
| return rc; |
| } |
| } |
| |
| if (intstat & FIT_ISH_MSG_FROM_DEV) |
| skd_isr_msg_from_dev(skdev); |
| } |
| } |
| |
| if (unlikely(flush_enqueued)) |
| schedule_work(&skdev->start_queue); |
| |
| if (deferred) |
| schedule_work(&skdev->completion_worker); |
| else if (!flush_enqueued) |
| schedule_work(&skdev->start_queue); |
| |
| spin_unlock(&skdev->lock); |
| |
| return rc; |
| } |
| |
| static void skd_drive_fault(struct skd_device *skdev) |
| { |
| skdev->state = SKD_DRVR_STATE_FAULT; |
| dev_err(&skdev->pdev->dev, "Drive FAULT\n"); |
| } |
| |
| static void skd_drive_disappeared(struct skd_device *skdev) |
| { |
| skdev->state = SKD_DRVR_STATE_DISAPPEARED; |
| dev_err(&skdev->pdev->dev, "Drive DISAPPEARED\n"); |
| } |
| |
| static void skd_isr_fwstate(struct skd_device *skdev) |
| { |
| u32 sense; |
| u32 state; |
| u32 mtd; |
| int prev_driver_state = skdev->state; |
| |
| sense = SKD_READL(skdev, FIT_STATUS); |
| state = sense & FIT_SR_DRIVE_STATE_MASK; |
| |
| dev_err(&skdev->pdev->dev, "s1120 state %s(%d)=>%s(%d)\n", |
| skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, |
| skd_drive_state_to_str(state), state); |
| |
| skdev->drive_state = state; |
| |
| switch (skdev->drive_state) { |
| case FIT_SR_DRIVE_INIT: |
| if (skdev->state == SKD_DRVR_STATE_PROTOCOL_MISMATCH) { |
| skd_disable_interrupts(skdev); |
| break; |
| } |
| if (skdev->state == SKD_DRVR_STATE_RESTARTING) |
| skd_recover_requests(skdev); |
| if (skdev->state == SKD_DRVR_STATE_WAIT_BOOT) { |
| skdev->timer_countdown = SKD_STARTING_TIMO; |
| skdev->state = SKD_DRVR_STATE_STARTING; |
| skd_soft_reset(skdev); |
| break; |
| } |
| mtd = FIT_MXD_CONS(FIT_MTD_FITFW_INIT, 0, 0); |
| SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); |
| skdev->last_mtd = mtd; |
| break; |
| |
| case FIT_SR_DRIVE_ONLINE: |
| skdev->cur_max_queue_depth = skd_max_queue_depth; |
| if (skdev->cur_max_queue_depth > skdev->dev_max_queue_depth) |
| skdev->cur_max_queue_depth = skdev->dev_max_queue_depth; |
| |
| skdev->queue_low_water_mark = |
| skdev->cur_max_queue_depth * 2 / 3 + 1; |
| if (skdev->queue_low_water_mark < 1) |
| skdev->queue_low_water_mark = 1; |
| dev_info(&skdev->pdev->dev, |
| "Queue depth limit=%d dev=%d lowat=%d\n", |
| skdev->cur_max_queue_depth, |
| skdev->dev_max_queue_depth, |
| skdev->queue_low_water_mark); |
| |
| skd_refresh_device_data(skdev); |
| break; |
| |
| case FIT_SR_DRIVE_BUSY: |
| skdev->state = SKD_DRVR_STATE_BUSY; |
| skdev->timer_countdown = SKD_BUSY_TIMO; |
| skd_quiesce_dev(skdev); |
| break; |
| case FIT_SR_DRIVE_BUSY_SANITIZE: |
| /* set timer for 3 seconds, we'll abort any unfinished |
| * commands after that expires |
| */ |
| skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; |
| skdev->timer_countdown = SKD_TIMER_SECONDS(3); |
| schedule_work(&skdev->start_queue); |
| break; |
| case FIT_SR_DRIVE_BUSY_ERASE: |
| skdev->state = SKD_DRVR_STATE_BUSY_ERASE; |
| skdev->timer_countdown = SKD_BUSY_TIMO; |
| break; |
| case FIT_SR_DRIVE_OFFLINE: |
| skdev->state = SKD_DRVR_STATE_IDLE; |
| break; |
| case FIT_SR_DRIVE_SOFT_RESET: |
| switch (skdev->state) { |
| case SKD_DRVR_STATE_STARTING: |
| case SKD_DRVR_STATE_RESTARTING: |
| /* Expected by a caller of skd_soft_reset() */ |
| break; |
| default: |
| skdev->state = SKD_DRVR_STATE_RESTARTING; |
| break; |
| } |
| break; |
| case FIT_SR_DRIVE_FW_BOOTING: |
| dev_dbg(&skdev->pdev->dev, "ISR FIT_SR_DRIVE_FW_BOOTING\n"); |
| skdev->state = SKD_DRVR_STATE_WAIT_BOOT; |
| skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; |
| break; |
| |
| case FIT_SR_DRIVE_DEGRADED: |
| case FIT_SR_PCIE_LINK_DOWN: |
| case FIT_SR_DRIVE_NEED_FW_DOWNLOAD: |
| break; |
| |
| case FIT_SR_DRIVE_FAULT: |
| skd_drive_fault(skdev); |
| skd_recover_requests(skdev); |
| schedule_work(&skdev->start_queue); |
| break; |
| |
| /* PCIe bus returned all Fs? */ |
| case 0xFF: |
| dev_info(&skdev->pdev->dev, "state=0x%x sense=0x%x\n", state, |
| sense); |
| skd_drive_disappeared(skdev); |
| skd_recover_requests(skdev); |
| schedule_work(&skdev->start_queue); |
| break; |
| default: |
| /* |
| * Uknown FW State. Wait for a state we recognize. |
| */ |
| break; |
| } |
| dev_err(&skdev->pdev->dev, "Driver state %s(%d)=>%s(%d)\n", |
| skd_skdev_state_to_str(prev_driver_state), prev_driver_state, |
| skd_skdev_state_to_str(skdev->state), skdev->state); |
| } |
| |
| static void skd_recover_request(struct request *req, void *data, bool reserved) |
| { |
| struct skd_device *const skdev = data; |
| struct skd_request_context *skreq = blk_mq_rq_to_pdu(req); |
| |
| if (skreq->state != SKD_REQ_STATE_BUSY) |
| return; |
| |
| skd_log_skreq(skdev, skreq, "recover"); |
| |
| /* Release DMA resources for the request. */ |
| if (skreq->n_sg > 0) |
| skd_postop_sg_list(skdev, skreq); |
| |
| skreq->state = SKD_REQ_STATE_IDLE; |
| skreq->status = BLK_STS_IOERR; |
| blk_mq_complete_request(req); |
| } |
| |
| static void skd_recover_requests(struct skd_device *skdev) |
| { |
| blk_mq_tagset_busy_iter(&skdev->tag_set, skd_recover_request, skdev); |
| } |
| |
| static void skd_isr_msg_from_dev(struct skd_device *skdev) |
| { |
| u32 mfd; |
| u32 mtd; |
| u32 data; |
| |
| mfd = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); |
| |
| dev_dbg(&skdev->pdev->dev, "mfd=0x%x last_mtd=0x%x\n", mfd, |
| skdev->last_mtd); |
| |
| /* ignore any mtd that is an ack for something we didn't send */ |
| if (FIT_MXD_TYPE(mfd) != FIT_MXD_TYPE(skdev->last_mtd)) |
| return; |
| |
| switch (FIT_MXD_TYPE(mfd)) { |
| case FIT_MTD_FITFW_INIT: |
| skdev->proto_ver = FIT_PROTOCOL_MAJOR_VER(mfd); |
| |
| if (skdev->proto_ver != FIT_PROTOCOL_VERSION_1) { |
| dev_err(&skdev->pdev->dev, "protocol mismatch\n"); |
| dev_err(&skdev->pdev->dev, " got=%d support=%d\n", |
| skdev->proto_ver, FIT_PROTOCOL_VERSION_1); |
| dev_err(&skdev->pdev->dev, " please upgrade driver\n"); |
| skdev->state = SKD_DRVR_STATE_PROTOCOL_MISMATCH; |
| skd_soft_reset(skdev); |
| break; |
| } |
| mtd = FIT_MXD_CONS(FIT_MTD_GET_CMDQ_DEPTH, 0, 0); |
| SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); |
| skdev->last_mtd = mtd; |
| break; |
| |
| case FIT_MTD_GET_CMDQ_DEPTH: |
| skdev->dev_max_queue_depth = FIT_MXD_DATA(mfd); |
| mtd = FIT_MXD_CONS(FIT_MTD_SET_COMPQ_DEPTH, 0, |
| SKD_N_COMPLETION_ENTRY); |
| SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); |
| skdev->last_mtd = mtd; |
| break; |
| |
| case FIT_MTD_SET_COMPQ_DEPTH: |
| SKD_WRITEQ(skdev, skdev->cq_dma_address, FIT_MSG_TO_DEVICE_ARG); |
| mtd = FIT_MXD_CONS(FIT_MTD_SET_COMPQ_ADDR, 0, 0); |
| SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); |
| skdev->last_mtd = mtd; |
| break; |
| |
| case FIT_MTD_SET_COMPQ_ADDR: |
| skd_reset_skcomp(skdev); |
| mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_HOST_ID, 0, skdev->devno); |
| SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); |
| skdev->last_mtd = mtd; |
| break; |
| |
| case FIT_MTD_CMD_LOG_HOST_ID: |
| skdev->connect_time_stamp = get_seconds(); |
| data = skdev->connect_time_stamp & 0xFFFF; |
| mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_TIME_STAMP_LO, 0, data); |
| SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); |
| skdev->last_mtd = mtd; |
| break; |
| |
| case FIT_MTD_CMD_LOG_TIME_STAMP_LO: |
| skdev->drive_jiffies = FIT_MXD_DATA(mfd); |
| data = (skdev->connect_time_stamp >> 16) & 0xFFFF; |
| mtd = FIT_MXD_CONS(FIT_MTD_CMD_LOG_TIME_STAMP_HI, 0, data); |
| SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); |
| skdev->last_mtd = mtd; |
| break; |
| |
| case FIT_MTD_CMD_LOG_TIME_STAMP_HI: |
| skdev->drive_jiffies |= (FIT_MXD_DATA(mfd) << 16); |
| mtd = FIT_MXD_CONS(FIT_MTD_ARM_QUEUE, 0, 0); |
| SKD_WRITEL(skdev, mtd, FIT_MSG_TO_DEVICE); |
| skdev->last_mtd = mtd; |
| |
| dev_err(&skdev->pdev->dev, "Time sync driver=0x%x device=0x%x\n", |
| skdev->connect_time_stamp, skdev->drive_jiffies); |
| break; |
| |
| case FIT_MTD_ARM_QUEUE: |
| skdev->last_mtd = 0; |
| /* |
| * State should be, or soon will be, FIT_SR_DRIVE_ONLINE. |
| */ |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| static void skd_disable_interrupts(struct skd_device *skdev) |
| { |
| u32 sense; |
| |
| sense = SKD_READL(skdev, FIT_CONTROL); |
| sense &= ~FIT_CR_ENABLE_INTERRUPTS; |
| SKD_WRITEL(skdev, sense, FIT_CONTROL); |
| dev_dbg(&skdev->pdev->dev, "sense 0x%x\n", sense); |
| |
| /* Note that the 1s is written. A 1-bit means |
| * disable, a 0 means enable. |
| */ |
| SKD_WRITEL(skdev, ~0, FIT_INT_MASK_HOST); |
| } |
| |
| static void skd_enable_interrupts(struct skd_device *skdev) |
| { |
| u32 val; |
| |
| /* unmask interrupts first */ |
| val = FIT_ISH_FW_STATE_CHANGE + |
| FIT_ISH_COMPLETION_POSTED + FIT_ISH_MSG_FROM_DEV; |
| |
| /* Note that the compliment of mask is written. A 1-bit means |
| * disable, a 0 means enable. */ |
| SKD_WRITEL(skdev, ~val, FIT_INT_MASK_HOST); |
| dev_dbg(&skdev->pdev->dev, "interrupt mask=0x%x\n", ~val); |
| |
| val = SKD_READL(skdev, FIT_CONTROL); |
| val |= FIT_CR_ENABLE_INTERRUPTS; |
| dev_dbg(&skdev->pdev->dev, "control=0x%x\n", val); |
| SKD_WRITEL(skdev, val, FIT_CONTROL); |
| } |
| |
| /* |
| ***************************************************************************** |
| * START, STOP, RESTART, QUIESCE, UNQUIESCE |
| ***************************************************************************** |
| */ |
| |
| static void skd_soft_reset(struct skd_device *skdev) |
| { |
| u32 val; |
| |
| val = SKD_READL(skdev, FIT_CONTROL); |
| val |= (FIT_CR_SOFT_RESET); |
| dev_dbg(&skdev->pdev->dev, "control=0x%x\n", val); |
| SKD_WRITEL(skdev, val, FIT_CONTROL); |
| } |
| |
| static void skd_start_device(struct skd_device *skdev) |
| { |
| unsigned long flags; |
| u32 sense; |
| u32 state; |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| |
| /* ack all ghost interrupts */ |
| SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); |
| |
| sense = SKD_READL(skdev, FIT_STATUS); |
| |
| dev_dbg(&skdev->pdev->dev, "initial status=0x%x\n", sense); |
| |
| state = sense & FIT_SR_DRIVE_STATE_MASK; |
| skdev->drive_state = state; |
| skdev->last_mtd = 0; |
| |
| skdev->state = SKD_DRVR_STATE_STARTING; |
| skdev->timer_countdown = SKD_STARTING_TIMO; |
| |
| skd_enable_interrupts(skdev); |
| |
| switch (skdev->drive_state) { |
| case FIT_SR_DRIVE_OFFLINE: |
| dev_err(&skdev->pdev->dev, "Drive offline...\n"); |
| break; |
| |
| case FIT_SR_DRIVE_FW_BOOTING: |
| dev_dbg(&skdev->pdev->dev, "FIT_SR_DRIVE_FW_BOOTING\n"); |
| skdev->state = SKD_DRVR_STATE_WAIT_BOOT; |
| skdev->timer_countdown = SKD_WAIT_BOOT_TIMO; |
| break; |
| |
| case FIT_SR_DRIVE_BUSY_SANITIZE: |
| dev_info(&skdev->pdev->dev, "Start: BUSY_SANITIZE\n"); |
| skdev->state = SKD_DRVR_STATE_BUSY_SANITIZE; |
| skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; |
| break; |
| |
| case FIT_SR_DRIVE_BUSY_ERASE: |
| dev_info(&skdev->pdev->dev, "Start: BUSY_ERASE\n"); |
| skdev->state = SKD_DRVR_STATE_BUSY_ERASE; |
| skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; |
| break; |
| |
| case FIT_SR_DRIVE_INIT: |
| case FIT_SR_DRIVE_ONLINE: |
| skd_soft_reset(skdev); |
| break; |
| |
| case FIT_SR_DRIVE_BUSY: |
| dev_err(&skdev->pdev->dev, "Drive Busy...\n"); |
| skdev->state = SKD_DRVR_STATE_BUSY; |
| skdev->timer_countdown = SKD_STARTED_BUSY_TIMO; |
| break; |
| |
| case FIT_SR_DRIVE_SOFT_RESET: |
| dev_err(&skdev->pdev->dev, "drive soft reset in prog\n"); |
| break; |
| |
| case FIT_SR_DRIVE_FAULT: |
| /* Fault state is bad...soft reset won't do it... |
| * Hard reset, maybe, but does it work on device? |
| * For now, just fault so the system doesn't hang. |
| */ |
| skd_drive_fault(skdev); |
| /*start the queue so we can respond with error to requests */ |
| dev_dbg(&skdev->pdev->dev, "starting queue\n"); |
| schedule_work(&skdev->start_queue); |
| skdev->gendisk_on = -1; |
| wake_up_interruptible(&skdev->waitq); |
| break; |
| |
| case 0xFF: |
| /* Most likely the device isn't there or isn't responding |
| * to the BAR1 addresses. */ |
| skd_drive_disappeared(skdev); |
| /*start the queue so we can respond with error to requests */ |
| dev_dbg(&skdev->pdev->dev, |
| "starting queue to error-out reqs\n"); |
| schedule_work(&skdev->start_queue); |
| skdev->gendisk_on = -1; |
| wake_up_interruptible(&skdev->waitq); |
| break; |
| |
| default: |
| dev_err(&skdev->pdev->dev, "Start: unknown state %x\n", |
| skdev->drive_state); |
| break; |
| } |
| |
| state = SKD_READL(skdev, FIT_CONTROL); |
| dev_dbg(&skdev->pdev->dev, "FIT Control Status=0x%x\n", state); |
| |
| state = SKD_READL(skdev, FIT_INT_STATUS_HOST); |
| dev_dbg(&skdev->pdev->dev, "Intr Status=0x%x\n", state); |
| |
| state = SKD_READL(skdev, FIT_INT_MASK_HOST); |
| dev_dbg(&skdev->pdev->dev, "Intr Mask=0x%x\n", state); |
| |
| state = SKD_READL(skdev, FIT_MSG_FROM_DEVICE); |
| dev_dbg(&skdev->pdev->dev, "Msg from Dev=0x%x\n", state); |
| |
| state = SKD_READL(skdev, FIT_HW_VERSION); |
| dev_dbg(&skdev->pdev->dev, "HW version=0x%x\n", state); |
| |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| } |
| |
| static void skd_stop_device(struct skd_device *skdev) |
| { |
| unsigned long flags; |
| struct skd_special_context *skspcl = &skdev->internal_skspcl; |
| u32 dev_state; |
| int i; |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| |
| if (skdev->state != SKD_DRVR_STATE_ONLINE) { |
| dev_err(&skdev->pdev->dev, "%s not online no sync\n", __func__); |
| goto stop_out; |
| } |
| |
| if (skspcl->req.state != SKD_REQ_STATE_IDLE) { |
| dev_err(&skdev->pdev->dev, "%s no special\n", __func__); |
| goto stop_out; |
| } |
| |
| skdev->state = SKD_DRVR_STATE_SYNCING; |
| skdev->sync_done = 0; |
| |
| skd_send_internal_skspcl(skdev, skspcl, SYNCHRONIZE_CACHE); |
| |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| |
| wait_event_interruptible_timeout(skdev->waitq, |
| (skdev->sync_done), (10 * HZ)); |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| |
| switch (skdev->sync_done) { |
| case 0: |
| dev_err(&skdev->pdev->dev, "%s no sync\n", __func__); |
| break; |
| case 1: |
| dev_err(&skdev->pdev->dev, "%s sync done\n", __func__); |
| break; |
| default: |
| dev_err(&skdev->pdev->dev, "%s sync error\n", __func__); |
| } |
| |
| stop_out: |
| skdev->state = SKD_DRVR_STATE_STOPPING; |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| |
| skd_kill_timer(skdev); |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| skd_disable_interrupts(skdev); |
| |
| /* ensure all ints on device are cleared */ |
| /* soft reset the device to unload with a clean slate */ |
| SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); |
| SKD_WRITEL(skdev, FIT_CR_SOFT_RESET, FIT_CONTROL); |
| |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| |
| /* poll every 100ms, 1 second timeout */ |
| for (i = 0; i < 10; i++) { |
| dev_state = |
| SKD_READL(skdev, FIT_STATUS) & FIT_SR_DRIVE_STATE_MASK; |
| if (dev_state == FIT_SR_DRIVE_INIT) |
| break; |
| set_current_state(TASK_INTERRUPTIBLE); |
| schedule_timeout(msecs_to_jiffies(100)); |
| } |
| |
| if (dev_state != FIT_SR_DRIVE_INIT) |
| dev_err(&skdev->pdev->dev, "%s state error 0x%02x\n", __func__, |
| dev_state); |
| } |
| |
| /* assume spinlock is held */ |
| static void skd_restart_device(struct skd_device *skdev) |
| { |
| u32 state; |
| |
| /* ack all ghost interrupts */ |
| SKD_WRITEL(skdev, FIT_INT_DEF_MASK, FIT_INT_STATUS_HOST); |
| |
| state = SKD_READL(skdev, FIT_STATUS); |
| |
| dev_dbg(&skdev->pdev->dev, "drive status=0x%x\n", state); |
| |
| state &= FIT_SR_DRIVE_STATE_MASK; |
| skdev->drive_state = state; |
| skdev->last_mtd = 0; |
| |
| skdev->state = SKD_DRVR_STATE_RESTARTING; |
| skdev->timer_countdown = SKD_RESTARTING_TIMO; |
| |
| skd_soft_reset(skdev); |
| } |
| |
| /* assume spinlock is held */ |
| static int skd_quiesce_dev(struct skd_device *skdev) |
| { |
| int rc = 0; |
| |
| switch (skdev->state) { |
| case SKD_DRVR_STATE_BUSY: |
| case SKD_DRVR_STATE_BUSY_IMMINENT: |
| dev_dbg(&skdev->pdev->dev, "stopping queue\n"); |
| blk_mq_stop_hw_queues(skdev->queue); |
| break; |
| case SKD_DRVR_STATE_ONLINE: |
| case SKD_DRVR_STATE_STOPPING: |
| case SKD_DRVR_STATE_SYNCING: |
| case SKD_DRVR_STATE_PAUSING: |
| case SKD_DRVR_STATE_PAUSED: |
| case SKD_DRVR_STATE_STARTING: |
| case SKD_DRVR_STATE_RESTARTING: |
| case SKD_DRVR_STATE_RESUMING: |
| default: |
| rc = -EINVAL; |
| dev_dbg(&skdev->pdev->dev, "state [%d] not implemented\n", |
| skdev->state); |
| } |
| return rc; |
| } |
| |
| /* assume spinlock is held */ |
| static int skd_unquiesce_dev(struct skd_device *skdev) |
| { |
| int prev_driver_state = skdev->state; |
| |
| skd_log_skdev(skdev, "unquiesce"); |
| if (skdev->state == SKD_DRVR_STATE_ONLINE) { |
| dev_dbg(&skdev->pdev->dev, "**** device already ONLINE\n"); |
| return 0; |
| } |
| if (skdev->drive_state != FIT_SR_DRIVE_ONLINE) { |
| /* |
| * If there has been an state change to other than |
| * ONLINE, we will rely on controller state change |
| * to come back online and restart the queue. |
| * The BUSY state means that driver is ready to |
| * continue normal processing but waiting for controller |
| * to become available. |
| */ |
| skdev->state = SKD_DRVR_STATE_BUSY; |
| dev_dbg(&skdev->pdev->dev, "drive BUSY state\n"); |
| return 0; |
| } |
| |
| /* |
| * Drive has just come online, driver is either in startup, |
| * paused performing a task, or bust waiting for hardware. |
| */ |
| switch (skdev->state) { |
| case SKD_DRVR_STATE_PAUSED: |
| case SKD_DRVR_STATE_BUSY: |
| case SKD_DRVR_STATE_BUSY_IMMINENT: |
| case SKD_DRVR_STATE_BUSY_ERASE: |
| case SKD_DRVR_STATE_STARTING: |
| case SKD_DRVR_STATE_RESTARTING: |
| case SKD_DRVR_STATE_FAULT: |
| case SKD_DRVR_STATE_IDLE: |
| case SKD_DRVR_STATE_LOAD: |
| skdev->state = SKD_DRVR_STATE_ONLINE; |
| dev_err(&skdev->pdev->dev, "Driver state %s(%d)=>%s(%d)\n", |
| skd_skdev_state_to_str(prev_driver_state), |
| prev_driver_state, skd_skdev_state_to_str(skdev->state), |
| skdev->state); |
| dev_dbg(&skdev->pdev->dev, |
| "**** device ONLINE...starting block queue\n"); |
| dev_dbg(&skdev->pdev->dev, "starting queue\n"); |
| dev_info(&skdev->pdev->dev, "STEC s1120 ONLINE\n"); |
| schedule_work(&skdev->start_queue); |
| skdev->gendisk_on = 1; |
| wake_up_interruptible(&skdev->waitq); |
| break; |
| |
| case SKD_DRVR_STATE_DISAPPEARED: |
| default: |
| dev_dbg(&skdev->pdev->dev, |
| "**** driver state %d, not implemented\n", |
| skdev->state); |
| return -EBUSY; |
| } |
| return 0; |
| } |
| |
| /* |
| ***************************************************************************** |
| * PCIe MSI/MSI-X INTERRUPT HANDLERS |
| ***************************************************************************** |
| */ |
| |
| static irqreturn_t skd_reserved_isr(int irq, void *skd_host_data) |
| { |
| struct skd_device *skdev = skd_host_data; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
| SKD_READL(skdev, FIT_INT_STATUS_HOST)); |
| dev_err(&skdev->pdev->dev, "MSIX reserved irq %d = 0x%x\n", irq, |
| SKD_READL(skdev, FIT_INT_STATUS_HOST)); |
| SKD_WRITEL(skdev, FIT_INT_RESERVED_MASK, FIT_INT_STATUS_HOST); |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t skd_statec_isr(int irq, void *skd_host_data) |
| { |
| struct skd_device *skdev = skd_host_data; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
| SKD_READL(skdev, FIT_INT_STATUS_HOST)); |
| SKD_WRITEL(skdev, FIT_ISH_FW_STATE_CHANGE, FIT_INT_STATUS_HOST); |
| skd_isr_fwstate(skdev); |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t skd_comp_q(int irq, void *skd_host_data) |
| { |
| struct skd_device *skdev = skd_host_data; |
| unsigned long flags; |
| int flush_enqueued = 0; |
| int deferred; |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
| SKD_READL(skdev, FIT_INT_STATUS_HOST)); |
| SKD_WRITEL(skdev, FIT_ISH_COMPLETION_POSTED, FIT_INT_STATUS_HOST); |
| deferred = skd_isr_completion_posted(skdev, skd_isr_comp_limit, |
| &flush_enqueued); |
| if (flush_enqueued) |
| schedule_work(&skdev->start_queue); |
| |
| if (deferred) |
| schedule_work(&skdev->completion_worker); |
| else if (!flush_enqueued) |
| schedule_work(&skdev->start_queue); |
| |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t skd_msg_isr(int irq, void *skd_host_data) |
| { |
| struct skd_device *skdev = skd_host_data; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
| SKD_READL(skdev, FIT_INT_STATUS_HOST)); |
| SKD_WRITEL(skdev, FIT_ISH_MSG_FROM_DEV, FIT_INT_STATUS_HOST); |
| skd_isr_msg_from_dev(skdev); |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data) |
| { |
| struct skd_device *skdev = skd_host_data; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n", |
| SKD_READL(skdev, FIT_INT_STATUS_HOST)); |
| SKD_WRITEL(skdev, FIT_INT_QUEUE_FULL, FIT_INT_STATUS_HOST); |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| ***************************************************************************** |
| * PCIe MSI/MSI-X SETUP |
| ***************************************************************************** |
| */ |
| |
| struct skd_msix_entry { |
| char isr_name[30]; |
| }; |
| |
| struct skd_init_msix_entry { |
| const char *name; |
| irq_handler_t handler; |
| }; |
| |
| #define SKD_MAX_MSIX_COUNT 13 |
| #define SKD_MIN_MSIX_COUNT 7 |
| #define SKD_BASE_MSIX_IRQ 4 |
| |
| static struct skd_init_msix_entry msix_entries[SKD_MAX_MSIX_COUNT] = { |
| { "(DMA 0)", skd_reserved_isr }, |
| { "(DMA 1)", skd_reserved_isr }, |
| { "(DMA 2)", skd_reserved_isr }, |
| { "(DMA 3)", skd_reserved_isr }, |
| { "(State Change)", skd_statec_isr }, |
| { "(COMPL_Q)", skd_comp_q }, |
| { "(MSG)", skd_msg_isr }, |
| { "(Reserved)", skd_reserved_isr }, |
| { "(Reserved)", skd_reserved_isr }, |
| { "(Queue Full 0)", skd_qfull_isr }, |
| { "(Queue Full 1)", skd_qfull_isr }, |
| { "(Queue Full 2)", skd_qfull_isr }, |
| { "(Queue Full 3)", skd_qfull_isr }, |
| }; |
| |
| static int skd_acquire_msix(struct skd_device *skdev) |
| { |
| int i, rc; |
| struct pci_dev *pdev = skdev->pdev; |
| |
| rc = pci_alloc_irq_vectors(pdev, SKD_MAX_MSIX_COUNT, SKD_MAX_MSIX_COUNT, |
| PCI_IRQ_MSIX); |
| if (rc < 0) { |
| dev_err(&skdev->pdev->dev, "failed to enable MSI-X %d\n", rc); |
| goto out; |
| } |
| |
| skdev->msix_entries = kcalloc(SKD_MAX_MSIX_COUNT, |
| sizeof(struct skd_msix_entry), GFP_KERNEL); |
| if (!skdev->msix_entries) { |
| rc = -ENOMEM; |
| dev_err(&skdev->pdev->dev, "msix table allocation error\n"); |
| goto out; |
| } |
| |
| /* Enable MSI-X vectors for the base queue */ |
| for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) { |
| struct skd_msix_entry *qentry = &skdev->msix_entries[i]; |
| |
| snprintf(qentry->isr_name, sizeof(qentry->isr_name), |
| "%s%d-msix %s", DRV_NAME, skdev->devno, |
| msix_entries[i].name); |
| |
| rc = devm_request_irq(&skdev->pdev->dev, |
| pci_irq_vector(skdev->pdev, i), |
| msix_entries[i].handler, 0, |
| qentry->isr_name, skdev); |
| if (rc) { |
| dev_err(&skdev->pdev->dev, |
| "Unable to register(%d) MSI-X handler %d: %s\n", |
| rc, i, qentry->isr_name); |
| goto msix_out; |
| } |
| } |
| |
| dev_dbg(&skdev->pdev->dev, "%d msix irq(s) enabled\n", |
| SKD_MAX_MSIX_COUNT); |
| return 0; |
| |
| msix_out: |
| while (--i >= 0) |
| devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), skdev); |
| out: |
| kfree(skdev->msix_entries); |
| skdev->msix_entries = NULL; |
| return rc; |
| } |
| |
| static int skd_acquire_irq(struct skd_device *skdev) |
| { |
| struct pci_dev *pdev = skdev->pdev; |
| unsigned int irq_flag = PCI_IRQ_LEGACY; |
| int rc; |
| |
| if (skd_isr_type == SKD_IRQ_MSIX) { |
| rc = skd_acquire_msix(skdev); |
| if (!rc) |
| return 0; |
| |
| dev_err(&skdev->pdev->dev, |
| "failed to enable MSI-X, re-trying with MSI %d\n", rc); |
| } |
| |
| snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d", DRV_NAME, |
| skdev->devno); |
| |
| if (skd_isr_type != SKD_IRQ_LEGACY) |
| irq_flag |= PCI_IRQ_MSI; |
| rc = pci_alloc_irq_vectors(pdev, 1, 1, irq_flag); |
| if (rc < 0) { |
| dev_err(&skdev->pdev->dev, |
| "failed to allocate the MSI interrupt %d\n", rc); |
| return rc; |
| } |
| |
| rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, |
| pdev->msi_enabled ? 0 : IRQF_SHARED, |
| skdev->isr_name, skdev); |
| if (rc) { |
| pci_free_irq_vectors(pdev); |
| dev_err(&skdev->pdev->dev, "failed to allocate interrupt %d\n", |
| rc); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| static void skd_release_irq(struct skd_device *skdev) |
| { |
| struct pci_dev *pdev = skdev->pdev; |
| |
| if (skdev->msix_entries) { |
| int i; |
| |
| for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) { |
| devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), |
| skdev); |
| } |
| |
| kfree(skdev->msix_entries); |
| skdev->msix_entries = NULL; |
| } else { |
| devm_free_irq(&pdev->dev, pdev->irq, skdev); |
| } |
| |
| pci_free_irq_vectors(pdev); |
| } |
| |
| /* |
| ***************************************************************************** |
| * CONSTRUCT |
| ***************************************************************************** |
| */ |
| |
| static void *skd_alloc_dma(struct skd_device *skdev, struct kmem_cache *s, |
| dma_addr_t *dma_handle, gfp_t gfp, |
| enum dma_data_direction dir) |
| { |
| struct device *dev = &skdev->pdev->dev; |
| void *buf; |
| |
| buf = kmem_cache_alloc(s, gfp); |
| if (!buf) |
| return NULL; |
| *dma_handle = dma_map_single(dev, buf, s->size, dir); |
| if (dma_mapping_error(dev, *dma_handle)) { |
| kmem_cache_free(s, buf); |
| buf = NULL; |
| } |
| return buf; |
| } |
| |
| static void skd_free_dma(struct skd_device *skdev, struct kmem_cache *s, |
| void *vaddr, dma_addr_t dma_handle, |
| enum dma_data_direction dir) |
| { |
| if (!vaddr) |
| return; |
| |
| dma_unmap_single(&skdev->pdev->dev, dma_handle, s->size, dir); |
| kmem_cache_free(s, vaddr); |
| } |
| |
| static int skd_cons_skcomp(struct skd_device *skdev) |
| { |
| int rc = 0; |
| struct fit_completion_entry_v1 *skcomp; |
| |
| dev_dbg(&skdev->pdev->dev, |
| "comp pci_alloc, total bytes %zd entries %d\n", |
| SKD_SKCOMP_SIZE, SKD_N_COMPLETION_ENTRY); |
| |
| skcomp = pci_zalloc_consistent(skdev->pdev, SKD_SKCOMP_SIZE, |
| &skdev->cq_dma_address); |
| |
| if (skcomp == NULL) { |
| rc = -ENOMEM; |
| goto err_out; |
| } |
| |
| skdev->skcomp_table = skcomp; |
| skdev->skerr_table = (struct fit_comp_error_info *)((char *)skcomp + |
| sizeof(*skcomp) * |
| SKD_N_COMPLETION_ENTRY); |
| |
| err_out: |
| return rc; |
| } |
| |
| static int skd_cons_skmsg(struct skd_device *skdev) |
| { |
| int rc = 0; |
| u32 i; |
| |
| dev_dbg(&skdev->pdev->dev, |
| "skmsg_table kcalloc, struct %lu, count %u total %lu\n", |
| sizeof(struct skd_fitmsg_context), skdev->num_fitmsg_context, |
| sizeof(struct skd_fitmsg_context) * skdev->num_fitmsg_context); |
| |
| skdev->skmsg_table = kcalloc(skdev->num_fitmsg_context, |
| sizeof(struct skd_fitmsg_context), |
| GFP_KERNEL); |
| if (skdev->skmsg_table == NULL) { |
| rc = -ENOMEM; |
| goto err_out; |
| } |
| |
| for (i = 0; i < skdev->num_fitmsg_context; i++) { |
| struct skd_fitmsg_context *skmsg; |
| |
| skmsg = &skdev->skmsg_table[i]; |
| |
| skmsg->id = i + SKD_ID_FIT_MSG; |
| |
| skmsg->msg_buf = pci_alloc_consistent(skdev->pdev, |
| SKD_N_FITMSG_BYTES, |
| &skmsg->mb_dma_address); |
| |
| if (skmsg->msg_buf == NULL) { |
| rc = -ENOMEM; |
| goto err_out; |
| } |
| |
| WARN(((uintptr_t)skmsg->msg_buf | skmsg->mb_dma_address) & |
| (FIT_QCMD_ALIGN - 1), |
| "not aligned: msg_buf %p mb_dma_address %#llx\n", |
| skmsg->msg_buf, skmsg->mb_dma_address); |
| memset(skmsg->msg_buf, 0, SKD_N_FITMSG_BYTES); |
| } |
| |
| err_out: |
| return rc; |
| } |
| |
| static struct fit_sg_descriptor *skd_cons_sg_list(struct skd_device *skdev, |
| u32 n_sg, |
| dma_addr_t *ret_dma_addr) |
| { |
| struct fit_sg_descriptor *sg_list; |
| |
| sg_list = skd_alloc_dma(skdev, skdev->sglist_cache, ret_dma_addr, |
| GFP_DMA | __GFP_ZERO, DMA_TO_DEVICE); |
| |
| if (sg_list != NULL) { |
| uint64_t dma_address = *ret_dma_addr; |
| u32 i; |
| |
| for (i = 0; i < n_sg - 1; i++) { |
| uint64_t ndp_off; |
| ndp_off = (i + 1) * sizeof(struct fit_sg_descriptor); |
| |
| sg_list[i].next_desc_ptr = dma_address + ndp_off; |
| } |
| sg_list[i].next_desc_ptr = 0LL; |
| } |
| |
| return sg_list; |
| } |
| |
| static void skd_free_sg_list(struct skd_device *skdev, |
| struct fit_sg_descriptor *sg_list, |
| dma_addr_t dma_addr) |
| { |
| if (WARN_ON_ONCE(!sg_list)) |
| return; |
| |
| skd_free_dma(skdev, skdev->sglist_cache, sg_list, dma_addr, |
| DMA_TO_DEVICE); |
| } |
| |
| static int skd_init_request(struct blk_mq_tag_set *set, struct request *rq, |
| unsigned int hctx_idx, unsigned int numa_node) |
| { |
| struct skd_device *skdev = set->driver_data; |
| struct skd_request_context *skreq = blk_mq_rq_to_pdu(rq); |
| |
| skreq->state = SKD_REQ_STATE_IDLE; |
| skreq->sg = (void *)(skreq + 1); |
| sg_init_table(skreq->sg, skd_sgs_per_request); |
| skreq->sksg_list = skd_cons_sg_list(skdev, skd_sgs_per_request, |
| &skreq->sksg_dma_address); |
| |
| return skreq->sksg_list ? 0 : -ENOMEM; |
| } |
| |
| static void skd_exit_request(struct blk_mq_tag_set *set, struct request *rq, |
| unsigned int hctx_idx) |
| { |
| struct skd_device *skdev = set->driver_data; |
| struct skd_request_context *skreq = blk_mq_rq_to_pdu(rq); |
| |
| skd_free_sg_list(skdev, skreq->sksg_list, skreq->sksg_dma_address); |
| } |
| |
| static int skd_cons_sksb(struct skd_device *skdev) |
| { |
| int rc = 0; |
| struct skd_special_context *skspcl; |
| |
| skspcl = &skdev->internal_skspcl; |
| |
| skspcl->req.id = 0 + SKD_ID_INTERNAL; |
| skspcl->req.state = SKD_REQ_STATE_IDLE; |
| |
| skspcl->data_buf = skd_alloc_dma(skdev, skdev->databuf_cache, |
| &skspcl->db_dma_address, |
| GFP_DMA | __GFP_ZERO, |
| DMA_BIDIRECTIONAL); |
| if (skspcl->data_buf == NULL) { |
| rc = -ENOMEM; |
| goto err_out; |
| } |
| |
| skspcl->msg_buf = skd_alloc_dma(skdev, skdev->msgbuf_cache, |
| &skspcl->mb_dma_address, |
| GFP_DMA | __GFP_ZERO, DMA_TO_DEVICE); |
| if (skspcl->msg_buf == NULL) { |
| rc = -ENOMEM; |
| goto err_out; |
| } |
| |
| skspcl->req.sksg_list = skd_cons_sg_list(skdev, 1, |
| &skspcl->req.sksg_dma_address); |
| if (skspcl->req.sksg_list == NULL) { |
| rc = -ENOMEM; |
| goto err_out; |
| } |
| |
| if (!skd_format_internal_skspcl(skdev)) { |
| rc = -EINVAL; |
| goto err_out; |
| } |
| |
| err_out: |
| return rc; |
| } |
| |
| static const struct blk_mq_ops skd_mq_ops = { |
| .queue_rq = skd_mq_queue_rq, |
| .complete = skd_complete_rq, |
| .timeout = skd_timed_out, |
| .init_request = skd_init_request, |
| .exit_request = skd_exit_request, |
| }; |
| |
| static int skd_cons_disk(struct skd_device *skdev) |
| { |
| int rc = 0; |
| struct gendisk *disk; |
| struct request_queue *q; |
| unsigned long flags; |
| |
| disk = alloc_disk(SKD_MINORS_PER_DEVICE); |
| if (!disk) { |
| rc = -ENOMEM; |
| goto err_out; |
| } |
| |
| skdev->disk = disk; |
| sprintf(disk->disk_name, DRV_NAME "%u", skdev->devno); |
| |
| disk->major = skdev->major; |
| disk->first_minor = skdev->devno * SKD_MINORS_PER_DEVICE; |
| disk->fops = &skd_blockdev_ops; |
| disk->private_data = skdev; |
| |
| memset(&skdev->tag_set, 0, sizeof(skdev->tag_set)); |
| skdev->tag_set.ops = &skd_mq_ops; |
| skdev->tag_set.nr_hw_queues = 1; |
| skdev->tag_set.queue_depth = skd_max_queue_depth; |
| skdev->tag_set.cmd_size = sizeof(struct skd_request_context) + |
| skdev->sgs_per_request * sizeof(struct scatterlist); |
| skdev->tag_set.numa_node = NUMA_NO_NODE; |
| skdev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | |
| BLK_MQ_F_SG_MERGE | |
| BLK_ALLOC_POLICY_TO_MQ_FLAG(BLK_TAG_ALLOC_FIFO); |
| skdev->tag_set.driver_data = skdev; |
| rc = blk_mq_alloc_tag_set(&skdev->tag_set); |
| if (rc) |
| goto err_out; |
| q = blk_mq_init_queue(&skdev->tag_set); |
| if (IS_ERR(q)) { |
| blk_mq_free_tag_set(&skdev->tag_set); |
| rc = PTR_ERR(q); |
| goto err_out; |
| } |
| q->queuedata = skdev; |
| |
| skdev->queue = q; |
| disk->queue = q; |
| |
| blk_queue_write_cache(q, true, true); |
| blk_queue_max_segments(q, skdev->sgs_per_request); |
| blk_queue_max_hw_sectors(q, SKD_N_MAX_SECTORS); |
| |
| /* set optimal I/O size to 8KB */ |
| blk_queue_io_opt(q, 8192); |
| |
| queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); |
| queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, q); |
| |
| blk_queue_rq_timeout(q, 8 * HZ); |
| |
| spin_lock_irqsave(&skdev->lock, flags); |
| dev_dbg(&skdev->pdev->dev, "stopping queue\n"); |
| blk_mq_stop_hw_queues(skdev->queue); |
| spin_unlock_irqrestore(&skdev->lock, flags); |
| |
| err_out: |
| return rc; |
| } |
| |
| #define SKD_N_DEV_TABLE 16u |
| static u32 skd_next_devno; |
| |
| static struct skd_device *skd_construct(struct pci_dev *pdev) |
| { |
| struct skd_device *skdev; |
| int blk_major = skd_major; |
| size_t size; |
| int rc; |
| |
| skdev = kzalloc(sizeof(*skdev), GFP_KERNEL); |
| |
| if (!skdev) { |
| dev_err(&pdev->dev, "memory alloc failure\n"); |
| return NULL; |
| } |
| |
| skdev->state = SKD_DRVR_STATE_LOAD; |
| skdev->pdev = pdev; |
| skdev->devno = skd_next_devno++; |
| skdev->major = blk_major; |
| skdev->dev_max_queue_depth = 0; |
| |
| skdev->num_req_context = skd_max_queue_depth; |
| skdev->num_fitmsg_context = skd_max_queue_depth; |
| skdev->cur_max_queue_depth = 1; |
| skdev->queue_low_water_mark = 1; |
| skdev->proto_ver = 99; |
| skdev->sgs_per_request = skd_sgs_per_request; |
| skdev->dbg_level = skd_dbg_level; |
| |
| spin_lock_init(&skdev->lock); |
| |
| INIT_WORK(&skdev->start_queue, skd_start_queue); |
| INIT_WORK(&skdev->completion_worker, skd_completion_worker); |
| |
| size = max(SKD_N_FITMSG_BYTES, SKD_N_SPECIAL_FITMSG_BYTES); |
| skdev->msgbuf_cache = kmem_cache_create("skd-msgbuf", size, 0, |
| SLAB_HWCACHE_ALIGN, NULL); |
| if (!skdev->msgbuf_cache) |
| goto err_out; |
| WARN_ONCE(kmem_cache_size(skdev->msgbuf_cache) < size, |
| "skd-msgbuf: %d < %zd\n", |
| kmem_cache_size(skdev->msgbuf_cache), size); |
| size = skd_sgs_per_request * sizeof(struct fit_sg_descriptor); |
| skdev->sglist_cache = kmem_cache_create("skd-sglist", size, 0, |
| SLAB_HWCACHE_ALIGN, NULL); |
| if (!skdev->sglist_cache) |
| goto err_out; |
| WARN_ONCE(kmem_cache_size(skdev->sglist_cache) < size, |
| "skd-sglist: %d < %zd\n", |
| kmem_cache_size(skdev->sglist_cache), size); |
| size = SKD_N_INTERNAL_BYTES; |
| skdev->databuf_cache = kmem_cache_create("skd-databuf", size, 0, |
| SLAB_HWCACHE_ALIGN, NULL); |
| if (!skdev->databuf_cache) |
| goto err_out; |
| WARN_ONCE(kmem_cache_size(skdev->databuf_cache) < size, |
| "skd-databuf: %d < %zd\n", |
| kmem_cache_size(skdev->databuf_cache), size); |
| |
| dev_dbg(&skdev->pdev->dev, "skcomp\n"); |
| rc = skd_cons_skcomp(skdev); |
| if (rc < 0) |
| goto err_out; |
| |
| dev_dbg(&skdev->pdev->dev, "skmsg\n"); |
| rc = skd_cons_skmsg(skdev); |
| if (rc < 0) |
| goto err_out; |
| |
| dev_dbg(&skdev->pdev->dev, "sksb\n"); |
| rc = skd_cons_sksb(skdev); |
| if (rc < 0) |
| goto err_out; |
| |
| dev_dbg(&skdev->pdev->dev, "disk\n"); |
| rc = skd_cons_disk(skdev); |
| if (rc < 0) |
| goto err_out; |
| |
| dev_dbg(&skdev->pdev->dev, "VICTORY\n"); |
| return skdev; |
| |
| err_out: |
| dev_dbg(&skdev->pdev->dev, "construct failed\n"); |
| skd_destruct(skdev); |
| return NULL; |
| } |
| |
| /* |
| ***************************************************************************** |
| * DESTRUCT (FREE) |
| ***************************************************************************** |
| */ |
| |
| static void skd_free_skcomp(struct skd_device *skdev) |
| { |
| if (skdev->skcomp_table) |
| pci_free_consistent(skdev->pdev, SKD_SKCOMP_SIZE, |
| skdev->skcomp_table, skdev->cq_dma_address); |
| |
| skdev->skcomp_table = NULL; |
| skdev->cq_dma_address = 0; |
| } |
| |
| static void skd_free_skmsg(struct skd_device *skdev) |
| { |
| u32 i; |
| |
| if (skdev->skmsg_table == NULL) |
| return; |
| |
| for (i = 0; i < skdev->num_fitmsg_context; i++) { |
| struct skd_fitmsg_context *skmsg; |
| |
| skmsg = &skdev->skmsg_table[i]; |
| |
| if (skmsg->msg_buf != NULL) { |
| pci_free_consistent(skdev->pdev, SKD_N_FITMSG_BYTES, |
| skmsg->msg_buf, |
| skmsg->mb_dma_address); |
| } |
| skmsg->msg_buf = NULL; |
| skmsg->mb_dma_address = 0; |
| } |
| |
| kfree(skdev->skmsg_table); |
| skdev->skmsg_table = NULL; |
| } |
| |
| static void skd_free_sksb(struct skd_device *skdev) |
| { |
| struct skd_special_context *skspcl = &skdev->internal_skspcl; |
| |
| skd_free_dma(skdev, skdev->databuf_cache, skspcl->data_buf, |
| skspcl->db_dma_address, DMA_BIDIRECTIONAL); |
| |
| skspcl->data_buf = NULL; |
| skspcl->db_dma_address = 0; |
| |
| skd_free_dma(skdev, skdev->msgbuf_cache, skspcl->msg_buf, |
| skspcl->mb_dma_address, DMA_TO_DEVICE); |
| |
| skspcl->msg_buf = NULL; |
| skspcl->mb_dma_address = 0; |
| |
| skd_free_sg_list(skdev, skspcl->req.sksg_list, |
| skspcl->req.sksg_dma_address); |
| |
| skspcl->req.sksg_list = NULL; |
| skspcl->req.sksg_dma_address = 0; |
| } |
| |
| static void skd_free_disk(struct skd_device *skdev) |
| { |
| struct gendisk *disk = skdev->disk; |
| |
| if (disk && (disk->flags & GENHD_FL_UP)) |
| del_gendisk(disk); |
| |
| if (skdev->queue) { |
| blk_cleanup_queue(skdev->queue); |
| skdev->queue = NULL; |
| if (disk) |
| disk->queue = NULL; |
| } |
| |
| if (skdev->tag_set.tags) |
| blk_mq_free_tag_set(&skdev->tag_set); |
| |
| put_disk(disk); |
| skdev->disk = NULL; |
| } |
| |
| static void skd_destruct(struct skd_device *skdev) |
| { |
| if (skdev == NULL) |
| return; |
| |
| cancel_work_sync(&skdev->start_queue); |
| |
| dev_dbg(&skdev->pdev->dev, "disk\n"); |
| skd_free_disk(skdev); |
| |
| dev_dbg(&skdev->pdev->dev, "sksb\n"); |
| skd_free_sksb(skdev); |
| |
| dev_dbg(&skdev->pdev->dev, "skmsg\n"); |
| skd_free_skmsg(skdev); |
| |
| dev_dbg(&skdev->pdev->dev, "skcomp\n"); |
| skd_free_skcomp(skdev); |
| |
| kmem_cache_destroy(skdev->databuf_cache); |
| kmem_cache_destroy(skdev->sglist_cache); |
| kmem_cache_destroy(skdev->msgbuf_cache); |
| |
| dev_dbg(&skdev->pdev->dev, "skdev\n"); |
| kfree(skdev); |
| } |
| |
| /* |
| ***************************************************************************** |
| * BLOCK DEVICE (BDEV) GLUE |
| ***************************************************************************** |
| */ |
| |
| static int skd_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| { |
| struct skd_device *skdev; |
| u64 capacity; |
| |
| skdev = bdev->bd_disk->private_data; |
| |
| dev_dbg(&skdev->pdev->dev, "%s: CMD[%s] getgeo device\n", |
| bdev->bd_disk->disk_name, current->comm); |
| |
| if (skdev->read_cap_is_valid) { |
| capacity = get_capacity(skdev->disk); |
| geo->heads = 64; |
| geo->sectors = 255; |
| geo->cylinders = (capacity) / (255 * 64); |
| |
| return 0; |
| } |
| return -EIO; |
| } |
| |
| static int skd_bdev_attach(struct device *parent, struct skd_device *skdev) |
| { |
| dev_dbg(&skdev->pdev->dev, "add_disk\n"); |
| device_add_disk(parent, skdev->disk); |
| return 0; |