+++ /dev/null
-// 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);
projects / linux-2.6-microblaze.git / commitdiff