diff options
Diffstat (limited to 'drivers/block/skd_main.c')
| -rw-r--r-- | drivers/block/skd_main.c | 3670 |
1 files changed, 0 insertions, 3670 deletions
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c deleted file mode 100644 index a962b4551bed..000000000000 --- a/drivers/block/skd_main.c +++ /dev/null @@ -1,3670 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * 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. - */ - -#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/err.h> -#include <linux/aer.h> -#include <linux/wait.h> -#include <linux/stringify.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; - int retries; - - 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 bool skd_inc_in_flight(struct request *rq, void *data, bool reserved) -{ - int *count = data; - - count++; - return true; -} - -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; - - if (!(req->rq_flags & RQF_DONTPREP)) { - skreq->retries = 0; - req->rq_flags |= RQF_DONTPREP; - } - - 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 = dma_map_sg(&skdev->pdev->dev, 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=%pad\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)); - dma_unmap_sg(&skdev->pdev->dev, &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(struct timer_list *t) -{ - struct skd_device *skdev = from_timer(skdev, t, timer); - 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; - - timer_setup(&skdev->timer, skd_timer_tick, 0); - - 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 %pad, 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=%pad\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; - if (likely(!blk_should_fake_timeout(req->q))) - blk_mq_complete_request(req); - break; - - case SKD_CHECK_STATUS_BUSY_IMMINENT: - skd_log_skreq(skdev, skreq, "retry(busy)"); - blk_mq_requeue_request(req, true); - 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 (++skreq->retries < SKD_MAX_RETRIES) { - skd_log_skreq(skdev, skreq, "retry"); - blk_mq_requeue_request(req, true); - break; - } - fallthrough; - - case SKD_CHECK_STATUS_REPORT_ERROR: - default: - skreq->status = BLK_STS_IOERR; - if (likely(!blk_should_fake_timeout(req->q))) - 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; - if (likely(!blk_should_fake_timeout(rq->q))) - 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 bool 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 true; - - 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); - return true; -} - -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: - /* hardware interface overflows in y2106 */ - skdev->connect_time_stamp = (u32)ktime_get_real_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, - kmem_cache_size(s), 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, - kmem_cache_size(s), 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 = dma_alloc_coherent(&skdev->pdev->dev, SKD_SKCOMP_SIZE, - &skdev->cq_dma_address, GFP_KERNEL); - - 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 = dma_alloc_coherent(&skdev->pdev->dev, - SKD_N_FITMSG_BYTES, - &skmsg->mb_dma_address, - GFP_KERNEL); - 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 %pad\n", - skmsg->msg_buf, &skmsg->mb_dma_address); - } - -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_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); - - blk_queue_flag_set(QUEUE_FLAG_NONROT, q); - blk_queue_flag_clear(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) - dma_free_coherent(&skdev->pdev->dev, 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) { - dma_free_coherent(&skdev->pdev->dev, 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, NULL); - return 0; -} - -static const struct block_device_operations skd_blockdev_ops = { - .owner = THIS_MODULE, - .getgeo = skd_bdev_getgeo, -}; - -/* - ***************************************************************************** - * PCIe DRIVER GLUE - ***************************************************************************** - */ - -static const struct pci_device_id skd_pci_tbl[] = { - { PCI_VENDOR_ID_STEC, PCI_DEVICE_ID_S1120, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, - { 0 } /* terminate list */ -}; - -MODULE_DEVICE_TABLE(pci, skd_pci_tbl); - -static char *skd_pci_info(struct skd_device *skdev, char *str) -{ - int pcie_reg; - - strcpy(str, "PCIe ("); - pcie_reg = pci_find_capability(skdev->pdev, PCI_CAP_ID_EXP); - - if (pcie_reg) { - - char lwstr[6]; - uint16_t pcie_lstat, lspeed, lwidth; - - pcie_reg += 0x12; - pci_read_config_word(skdev->pdev, pcie_reg, &pcie_lstat); - lspeed = pcie_lstat & (0xF); - lwidth = (pcie_lstat & 0x3F0) >> 4; - - if (lspeed == 1) - strcat(str, "2.5GT/s "); - else if (lspeed == 2) - strcat(str, "5.0GT/s "); - else - strcat(str, "<unknown> "); - snprintf(lwstr, sizeof(lwstr), "%dX)", lwidth); - strcat(str, lwstr); - } - return str; -} - -static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) -{ - int i; - int rc = 0; - char pci_str[32]; - struct skd_device *skdev; - - dev_dbg(&pdev->dev, "vendor=%04X device=%04x\n", pdev->vendor, - pdev->device); - - rc = pci_enable_device(pdev); - if (rc) - return rc; - rc = pci_request_regions(pdev, DRV_NAME); - if (rc) - goto err_out; - rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); - if (rc) - rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); - if (rc) { - dev_err(&pdev->dev, "DMA mask error %d\n", rc); - goto err_out_regions; - } - - if (!skd_major) { - rc = register_blkdev(0, DRV_NAME); - if (rc < 0) - goto err_out_regions; - BUG_ON(!rc); - skd_major = rc; - } - - skdev = skd_construct(pdev); - if (skdev == NULL) { - rc = -ENOMEM; - goto err_out_regions; - } - - skd_pci_info(skdev, pci_str); - dev_info(&pdev->dev, "%s 64bit\n", pci_str); - - pci_set_master(pdev); - rc = pci_enable_pcie_error_reporting(pdev); - if (rc) { - dev_err(&pdev->dev, - "bad enable of PCIe error reporting rc=%d\n", rc); - skdev->pcie_error_reporting_is_enabled = 0; - } else - skdev->pcie_error_reporting_is_enabled = 1; - - pci_set_drvdata(pdev, skdev); - - for (i = 0; i < SKD_MAX_BARS; i++) { - skdev->mem_phys[i] = pci_resource_start(pdev, i); - skdev->mem_size[i] = (u32)pci_resource_len(pdev, i); - skdev->mem_map[i] = ioremap(skdev->mem_phys[i], - skdev->mem_size[i]); - if (!skdev->mem_map[i]) { - dev_err(&pdev->dev, - "Unable to map adapter memory!\n"); - rc = -ENODEV; - goto err_out_iounmap; - } - dev_dbg(&pdev->dev, "mem_map=%p, phyd=%016llx, size=%d\n", - skdev->mem_map[i], (uint64_t)skdev->mem_phys[i], - skdev->mem_size[i]); - } - - rc = skd_acquire_irq(skdev); - if (rc) { - dev_err(&pdev->dev, "interrupt resource error %d\n", rc); - goto err_out_iounmap; - } - - rc = skd_start_timer(skdev); - if (rc) - goto err_out_timer; - - init_waitqueue_head(&skdev->waitq); - - skd_start_device(skdev); - - rc = wait_event_interruptible_timeout(skdev->waitq, - (skdev->gendisk_on), - (SKD_START_WAIT_SECONDS * HZ)); - if (skdev->gendisk_on > 0) { - /* device came on-line after reset */ - skd_bdev_attach(&pdev->dev, skdev); - rc = 0; - } else { - /* we timed out, something is wrong with the device, - don't add the disk structure */ - dev_err(&pdev->dev, "error: waiting for s1120 timed out %d!\n", - rc); - /* in case of no error; we timeout with ENXIO */ - if (!rc) - rc = -ENXIO; - goto err_out_timer; - } - - return rc; - -err_out_timer: - skd_stop_device(skdev); - skd_release_irq(skdev); - -err_out_iounmap: - for (i = 0; i < SKD_MAX_BARS; i++) - if (skdev->mem_map[i]) - iounmap(skdev->mem_map[i]); - - if (skdev->pcie_error_reporting_is_enabled) - pci_disable_pcie_error_reporting(pdev); - - skd_destruct(skdev); - -err_out_regions: - pci_release_regions(pdev); - -err_out: - pci_disable_device(pdev); - pci_set_drvdata(pdev, NULL); - return rc; -} - -static void skd_pci_remove(struct pci_dev *pdev) -{ - int i; - struct skd_device *skdev; - - skdev = pci_get_drvdata(pdev); - if (!skdev) { - dev_err(&pdev->dev, "no device data for PCI\n"); - return; - } - skd_stop_device(skdev); - skd_release_irq(skdev); - - for (i = 0; i < SKD_MAX_BARS; i++) - if (skdev->mem_map[i]) - iounmap(skdev->mem_map[i]); - - if (skdev->pcie_error_reporting_is_enabled) - pci_disable_pcie_error_reporting(pdev); - - skd_destruct(skdev); - - pci_release_regions(pdev); - pci_disable_device(pdev); - pci_set_drvdata(pdev, NULL); - - return; -} - -static int skd_pci_suspend(struct pci_dev *pdev, pm_message_t state) -{ - int i; - struct skd_device *skdev; - - skdev = pci_get_drvdata(pdev); - if (!skdev) { - dev_err(&pdev->dev, "no device data for PCI\n"); - return -EIO; - } - - skd_stop_device(skdev); - - skd_release_irq(skdev); - - for (i = 0; i < SKD_MAX_BARS; i++) - if (skdev->mem_map[i]) - iounmap(skdev->mem_map[i]); - - if (skdev->pcie_error_reporting_is_enabled) - pci_disable_pcie_error_reporting(pdev); - - pci_release_regions(pdev); - pci_save_state(pdev); - pci_disable_device(pdev); - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - return 0; -} - -static int skd_pci_resume(struct pci_dev *pdev) -{ - int i; - int rc = 0; - struct skd_device *skdev; - - skdev = pci_get_drvdata(pdev); - if (!skdev) { - dev_err(&pdev->dev, "no device data for PCI\n"); - return -1; - } - - pci_set_power_state(pdev, PCI_D0); - pci_enable_wake(pdev, PCI_D0, 0); - pci_restore_state(pdev); - - rc = pci_enable_device(pdev); - if (rc) - return rc; - rc = pci_request_regions(pdev, DRV_NAME); - if (rc) - goto err_out; - rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); - if (rc) - rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); - if (rc) { - dev_err(&pdev->dev, "DMA mask error %d\n", rc); - goto err_out_regions; - } - - pci_set_master(pdev); - rc = pci_enable_pcie_error_reporting(pdev); - if (rc) { - dev_err(&pdev->dev, - "bad enable of PCIe error reporting rc=%d\n", rc); - skdev->pcie_error_reporting_is_enabled = 0; - } else - skdev->pcie_error_reporting_is_enabled = 1; - - for (i = 0; i < SKD_MAX_BARS; i++) { - - skdev->mem_phys[i] = pci_resource_start(pdev, i); - skdev->mem_size[i] = (u32)pci_resource_len(pdev, i); - skdev->mem_map[i] = ioremap(skdev->mem_phys[i], - skdev->mem_size[i]); - if (!skdev->mem_map[i]) { - dev_err(&pdev->dev, "Unable to map adapter memory!\n"); - rc = -ENODEV; - goto err_out_iounmap; - } - dev_dbg(&pdev->dev, "mem_map=%p, phyd=%016llx, size=%d\n", - skdev->mem_map[i], (uint64_t)skdev->mem_phys[i], - skdev->mem_size[i]); - } - rc = skd_acquire_irq(skdev); - if (rc) { - dev_err(&pdev->dev, "interrupt resource error %d\n", rc); - goto err_out_iounmap; - } - - rc = skd_start_timer(skdev); - if (rc) - goto err_out_timer; - - init_waitqueue_head(&skdev->waitq); - - skd_start_device(skdev); - - return rc; - -err_out_timer: - skd_stop_device(skdev); - skd_release_irq(skdev); - -err_out_iounmap: - for (i = 0; i < SKD_MAX_BARS; i++) - if (skdev->mem_map[i]) - iounmap(skdev->mem_map[i]); - - if (skdev->pcie_error_reporting_is_enabled) - pci_disable_pcie_error_reporting(pdev); - -err_out_regions: - pci_release_regions(pdev); - -err_out: - pci_disable_device(pdev); - return rc; -} - -static void skd_pci_shutdown(struct pci_dev *pdev) -{ - struct skd_device *skdev; - - dev_err(&pdev->dev, "%s called\n", __func__); - - skdev = pci_get_drvdata(pdev); - if (!skdev) { - dev_err(&pdev->dev, "no device data for PCI\n"); - return; - } - - dev_err(&pdev->dev, "calling stop\n"); - skd_stop_device(skdev); -} - -static struct pci_driver skd_driver = { - .name = DRV_NAME, - .id_table = skd_pci_tbl, - .probe = skd_pci_probe, - .remove = skd_pci_remove, - .suspend = skd_pci_suspend, - .resume = skd_pci_resume, - .shutdown = skd_pci_shutdown, -}; - -/* - ***************************************************************************** - * LOGGING SUPPORT - ***************************************************************************** - */ - -const char *skd_drive_state_to_str(int state) -{ - switch (state) { - case FIT_SR_DRIVE_OFFLINE: - return "OFFLINE"; - case FIT_SR_DRIVE_INIT: - return "INIT"; - case FIT_SR_DRIVE_ONLINE: - return "ONLINE"; - case FIT_SR_DRIVE_BUSY: - return "BUSY"; - case FIT_SR_DRIVE_FAULT: - return "FAULT"; - case FIT_SR_DRIVE_DEGRADED: - return "DEGRADED"; - case FIT_SR_PCIE_LINK_DOWN: - return "INK_DOWN"; - case FIT_SR_DRIVE_SOFT_RESET: - return "SOFT_RESET"; - case FIT_SR_DRIVE_NEED_FW_DOWNLOAD: - return "NEED_FW"; - case FIT_SR_DRIVE_INIT_FAULT: - return "INIT_FAULT"; - case FIT_SR_DRIVE_BUSY_SANITIZE: - return "BUSY_SANITIZE"; - case FIT_SR_DRIVE_BUSY_ERASE: - return "BUSY_ERASE"; - case FIT_SR_DRIVE_FW_BOOTING: - return "FW_BOOTING"; - default: - return "???"; - } -} - -const char *skd_skdev_state_to_str(enum skd_drvr_state state) -{ - switch (state) { - case SKD_DRVR_STATE_LOAD: - return "LOAD"; - case SKD_DRVR_STATE_IDLE: - return "IDLE"; - case SKD_DRVR_STATE_BUSY: - return "BUSY"; - case SKD_DRVR_STATE_STARTING: - return "STARTING"; - case SKD_DRVR_STATE_ONLINE: - return "ONLINE"; - case SKD_DRVR_STATE_PAUSING: - return "PAUSING"; - case SKD_DRVR_STATE_PAUSED: - return "PAUSED"; - case SKD_DRVR_STATE_RESTARTING: - return "RESTARTING"; - case SKD_DRVR_STATE_RESUMING: - return "RESUMING"; - case SKD_DRVR_STATE_STOPPING: - return "STOPPING"; - case SKD_DRVR_STATE_SYNCING: - return "SYNCING"; - case SKD_DRVR_STATE_FAULT: - return "FAULT"; - case SKD_DRVR_STATE_DISAPPEARED: - return "DISAPPEARED"; - case SKD_DRVR_STATE_BUSY_ERASE: - return "BUSY_ERASE"; - case SKD_DRVR_STATE_BUSY_SANITIZE: - return "BUSY_SANITIZE"; - case SKD_DRVR_STATE_BUSY_IMMINENT: - return "BUSY_IMMINENT"; - case SKD_DRVR_STATE_WAIT_BOOT: - return "WAIT_BOOT"; - - default: - return "???"; - } -} - -static const char *skd_skreq_state_to_str(enum skd_req_state state) -{ - switch (state) { - case SKD_REQ_STATE_IDLE: - return "IDLE"; - case SKD_REQ_STATE_SETUP: - return "SETUP"; - case SKD_REQ_STATE_BUSY: - return "BUSY"; - case SKD_REQ_STATE_COMPLETED: - return "COMPLETED"; - case SKD_REQ_STATE_TIMEOUT: - return "TIMEOUT"; - default: - return "???"; - } -} - -static void skd_log_skdev(struct skd_device *skdev, const char *event) -{ - dev_dbg(&skdev->pdev->dev, "skdev=%p event='%s'\n", skdev, event); - dev_dbg(&skdev->pdev->dev, " drive_state=%s(%d) driver_state=%s(%d)\n", - skd_drive_state_to_str(skdev->drive_state), skdev->drive_state, - skd_skdev_state_to_str(skdev->state), skdev->state); - dev_dbg(&skdev->pdev->dev, " busy=%d limit=%d dev=%d lowat=%d\n", - skd_in_flight(skdev), skdev->cur_max_queue_depth, - skdev->dev_max_queue_depth, skdev->queue_low_water_mark); - dev_dbg(&skdev->pdev->dev, " cycle=%d cycle_ix=%d\n", - skdev->skcomp_cycle, skdev->skcomp_ix); -} - -static void skd_log_skreq(struct skd_device *skdev, - struct skd_request_context *skreq, const char *event) -{ - struct request *req = blk_mq_rq_from_pdu(skreq); - u32 lba = blk_rq_pos(req); - u32 count = blk_rq_sectors(req); - - dev_dbg(&skdev->pdev->dev, "skreq=%p event='%s'\n", skreq, event); - dev_dbg(&skdev->pdev->dev, " state=%s(%d) id=0x%04x fitmsg=0x%04x\n", - skd_skreq_state_to_str(skreq->state), skreq->state, skreq->id, - skreq->fitmsg_id); - dev_dbg(&skdev->pdev->dev, " sg_dir=%d n_sg=%d\n", - skreq->data_dir, skreq->n_sg); - - dev_dbg(&skdev->pdev->dev, - "req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n", req, lba, lba, - count, count, (int)rq_data_dir(req)); -} - -/* - ***************************************************************************** - * MODULE GLUE - ***************************************************************************** - */ - -static int __init skd_init(void) -{ - BUILD_BUG_ON(sizeof(struct fit_completion_entry_v1) != 8); - BUILD_BUG_ON(sizeof(struct fit_comp_error_info) != 32); - BUILD_BUG_ON(sizeof(struct skd_command_header) != 16); - BUILD_BUG_ON(sizeof(struct skd_scsi_request) != 32); - BUILD_BUG_ON(sizeof(struct driver_inquiry_data) != 44); - BUILD_BUG_ON(offsetof(struct skd_msg_buf, fmh) != 0); - BUILD_BUG_ON(offsetof(struct skd_msg_buf, scsi) != 64); - BUILD_BUG_ON(sizeof(struct skd_msg_buf) != SKD_N_FITMSG_BYTES); - - switch (skd_isr_type) { - case SKD_IRQ_LEGACY: - case SKD_IRQ_MSI: - case SKD_IRQ_MSIX: - break; - default: - pr_err(PFX "skd_isr_type %d invalid, re-set to %d\n", - skd_isr_type, SKD_IRQ_DEFAULT); - skd_isr_type = SKD_IRQ_DEFAULT; - } - - if (skd_max_queue_depth < 1 || - skd_max_queue_depth > SKD_MAX_QUEUE_DEPTH) { - pr_err(PFX "skd_max_queue_depth %d invalid, re-set to %d\n", - skd_max_queue_depth, SKD_MAX_QUEUE_DEPTH_DEFAULT); - skd_max_queue_depth = SKD_MAX_QUEUE_DEPTH_DEFAULT; - } - - if (skd_max_req_per_msg < 1 || - skd_max_req_per_msg > SKD_MAX_REQ_PER_MSG) { - pr_err(PFX "skd_max_req_per_msg %d invalid, re-set to %d\n", - skd_max_req_per_msg, SKD_MAX_REQ_PER_MSG_DEFAULT); - skd_max_req_per_msg = SKD_MAX_REQ_PER_MSG_DEFAULT; - } - - if (skd_sgs_per_request < 1 || skd_sgs_per_request > 4096) { - pr_err(PFX "skd_sg_per_request %d invalid, re-set to %d\n", - skd_sgs_per_request, SKD_N_SG_PER_REQ_DEFAULT); - skd_sgs_per_request = SKD_N_SG_PER_REQ_DEFAULT; - } - - if (skd_dbg_level < 0 || skd_dbg_level > 2) { - pr_err(PFX "skd_dbg_level %d invalid, re-set to %d\n", - skd_dbg_level, 0); - skd_dbg_level = 0; - } - - if (skd_isr_comp_limit < 0) { - pr_err(PFX "skd_isr_comp_limit %d invalid, set to %d\n", - skd_isr_comp_limit, 0); - skd_isr_comp_limit = 0; - } - - return pci_register_driver(&skd_driver); -} - -static void __exit skd_exit(void) -{ - pci_unregister_driver(&skd_driver); - - if (skd_major) - unregister_blkdev(skd_major, DRV_NAME); -} - -module_init(skd_init); -module_exit(skd_exit); |