new file mode 100644
@@ -0,0 +1,2632 @@
+/*
+ * Copyright 2014 Cisco Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/mempool.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/workqueue.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/gfp.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_dbg.h>
+
+#include "snic_io.h"
+#include "snic.h"
+
+#define snic_cmd_tag(sc) (((struct scsi_cmnd *) sc)->request->tag)
+
+const char *snic_state_str[] = {
+ [SNIC_INIT] = "SNIC_INIT",
+ [SNIC_ERROR] = "SNIC_ERROR",
+ [SNIC_ONLINE] = "SNIC_ONLINE",
+ [SNIC_OFFLINE] = "SNIC_OFFLINE",
+ [SNIC_FWRESET] = "SNIC_FWRESET",
+};
+
+static const char * const snic_req_state_str[] = {
+ [SNIC_IOREQ_NOT_INITED] = "SNIC_IOREQ_NOT_INITED",
+ [SNIC_IOREQ_PENDING] = "SNIC_IOREQ_PENDING",
+ [SNIC_IOREQ_ABTS_PENDING] = "SNIC_IOREQ_ABTS_PENDING",
+ [SNIC_IOREQ_ABTS_COMPLETE] = "SNIC_IOREQ_ABTS_COMPELTE",
+ [SNIC_IOREQ_LR_PENDING] = "SNIC_IOREQ_LR_PENDING",
+ [SNIC_IOREQ_LR_COMPLETE] = "SNIC_IOREQ_LR_COMPELTE",
+ [SNIC_IOREQ_COMPLETE] = "SNIC_IOREQ_CMD_COMPELTE",
+};
+
+/* snic cmd status strings */
+static const char * const snic_io_status_str[] = {
+ [SNIC_STAT_IO_SUCCESS] = "SNIC_STAT_IO_SUCCESS", /* 0x0 */
+ [SNIC_STAT_INVALID_HDR] = "SNIC_STAT_INVALID_HDR",
+ [SNIC_STAT_OUT_OF_RES] = "SNIC_STAT_OUT_OF_RES",
+ [SNIC_STAT_INVALID_PARM] = "SNIC_STAT_INVALID_PARM",
+ [SNIC_STAT_REQ_NOT_SUP] = "SNIC_STAT_REQ_NOT_SUP",
+ [SNIC_STAT_IO_NOT_FOUND] = "SNIC_STAT_IO_NOT_FOUND",
+ [SNIC_STAT_ABORTED] = "SNIC_STAT_ABORTED",
+ [SNIC_STAT_TIMEOUT] = "SNIC_STAT_TIMEOUT",
+ [SNIC_STAT_SGL_INVALID] = "SNIC_STAT_SGL_INVALID",
+ [SNIC_STAT_DATA_CNT_MISMATCH] = "SNIC_STAT_DATA_CNT_MISMATCH",
+ [SNIC_STAT_FW_ERR] = "SNIC_STAT_FW_ERR",
+ [SNIC_STAT_ITMF_REJECT] = "SNIC_STAT_ITMF_REJECT",
+ [SNIC_STAT_ITMF_FAIL] = "SNIC_STAT_ITMF_FAIL",
+ [SNIC_STAT_ITMF_INCORRECT_LUN] = "SNIC_STAT_ITMF_INCORRECT_LUN",
+ [SNIC_STAT_CMND_REJECT] = "SNIC_STAT_CMND_REJECT",
+ [SNIC_STAT_DEV_OFFLINE] = "SNIC_STAT_DEV_OFFLINE",
+ [SNIC_STAT_NO_BOOTLUN] = "SNIC_STAT_NO_BOOTLUN",
+ [SNIC_STAT_SCSI_ERR] = "SNIC_STAT_SCSI_ERR",
+ [SNIC_STAT_NOT_READY] = "SNIC_STAT_NOT_READY",
+ [SNIC_STAT_FATAL_ERROR] = "SNIC_STAT_FATAL_ERROR",
+};
+
+static void snic_scsi_cleanup(struct snic *, int);
+
+const char *
+snic_state_to_str(unsigned int state)
+{
+ if (state >= ARRAY_SIZE(snic_state_str) || !snic_state_str[state])
+ return "Unknown";
+
+ return snic_state_str[state];
+}
+
+static const char *
+snic_io_status_to_str(unsigned int state)
+{
+ if ((state >= ARRAY_SIZE(snic_io_status_str)) ||
+ (!snic_io_status_str[state]))
+ return "Unknown";
+
+ return snic_io_status_str[state];
+}
+
+static const char *
+snic_ioreq_state_to_str(unsigned int state)
+{
+ if (state >= ARRAY_SIZE(snic_req_state_str) ||
+ !snic_req_state_str[state])
+ return "Unknown";
+
+ return snic_req_state_str[state];
+}
+
+static inline spinlock_t *
+snic_io_lock_hash(struct snic *snic, struct scsi_cmnd *sc)
+{
+ u32 hash = snic_cmd_tag(sc) & (SNIC_IO_LOCKS - 1);
+
+ return &snic->io_req_lock[hash];
+}
+
+static inline spinlock_t *
+snic_io_lock_tag(struct snic *snic, int tag)
+{
+ return &snic->io_req_lock[tag & (SNIC_IO_LOCKS - 1)];
+}
+
+/* snic_release_req_buf : Releases snic_req_info */
+static void
+snic_release_req_buf(struct snic *snic,
+ struct snic_req_info *rqi,
+ struct scsi_cmnd *sc)
+{
+ struct snic_host_req *req = rqi_to_req(rqi);
+
+ /* Freeing cmd without marking completion, not okay */
+ SNIC_BUG_ON(!((CMD_STATE(sc) == SNIC_IOREQ_COMPLETE) ||
+ (CMD_STATE(sc) == SNIC_IOREQ_ABTS_COMPLETE) ||
+ (CMD_FLAGS(sc) & SNIC_DEV_RST_NOTSUP) ||
+ (CMD_FLAGS(sc) & SNIC_IO_INTERNAL_TERM_ISSUED) ||
+ (CMD_FLAGS(sc) & SNIC_DEV_RST_TERM_ISSUED) ||
+ (CMD_FLAGS(sc) & SNIC_SCSI_CLEANUP) ||
+ (CMD_STATE(sc) == SNIC_IOREQ_LR_COMPLETE)));
+
+ SNIC_SCSI_DBG(snic->shost,
+ "Rel_req:sc %p:tag %x:rqi %p:ioreq %p:abt %p:dr %p: state %s:flags 0x%llx\n",
+ sc, snic_cmd_tag(sc), rqi, rqi->req, rqi->abort_req,
+ rqi->dr_req, snic_ioreq_state_to_str(CMD_STATE(sc)),
+ CMD_FLAGS(sc));
+
+ if (req->u.icmnd.sense_addr)
+ pci_unmap_single(snic->pdev,
+ le64_to_cpu(req->u.icmnd.sense_addr),
+ SCSI_SENSE_BUFFERSIZE,
+ PCI_DMA_FROMDEVICE);
+
+ scsi_dma_unmap(sc);
+
+ snic_req_free(snic, rqi);
+} /* end of snic_release_req_buf */
+
+/*
+ * snic_queue_icmnd_req : Queues snic_icmnd request
+ */
+static int
+snic_queue_icmnd_req(struct snic *snic,
+ struct snic_req_info *rqi,
+ struct scsi_cmnd *sc,
+ int sg_cnt)
+{
+ struct scatterlist *sg;
+ struct snic_sg_desc *sgd;
+ dma_addr_t pa = 0;
+ struct scsi_lun lun;
+ u16 flags = 0;
+ int ret = 0;
+ unsigned int i;
+
+ if (sg_cnt) {
+ flags = SNIC_ICMND_ESGL;
+ sgd = (struct snic_sg_desc *) req_to_sgl(rqi->req);
+
+ for_each_sg(scsi_sglist(sc), sg, sg_cnt, i) {
+ sgd->addr = cpu_to_le64(sg_dma_address(sg));
+ sgd->len = cpu_to_le32(sg_dma_len(sg));
+ sgd->_resvd = 0;
+ sgd++;
+ }
+ }
+
+ pa = pci_map_single(snic->pdev,
+ sc->sense_buffer,
+ SCSI_SENSE_BUFFERSIZE,
+ PCI_DMA_FROMDEVICE);
+
+ if (pci_dma_mapping_error(snic->pdev, pa)) {
+ SNIC_HOST_ERR(snic->shost,
+ "QIcmnd:PCI Map Failed for sns buf %p tag %x\n",
+ sc->sense_buffer, snic_cmd_tag(sc));
+ ret = -ENOMEM;
+
+ return ret;
+ }
+
+ int_to_scsilun(sc->device->lun, &lun);
+ if (sc->sc_data_direction == DMA_FROM_DEVICE)
+ flags |= SNIC_ICMND_RD;
+ if (sc->sc_data_direction == DMA_TO_DEVICE)
+ flags |= SNIC_ICMND_WR;
+
+ /* Initialize icmnd */
+ snic_icmnd_init(rqi->req,
+ snic_cmd_tag(sc),
+ snic->config.hid, /* hid */
+ (ulong) rqi,
+ flags, /* command flags */
+ rqi->tgt_id,
+ lun.scsi_lun,
+ sc->cmnd,
+ sc->cmd_len,
+ scsi_bufflen(sc),
+ sg_cnt,
+ (ulong) req_to_sgl(rqi->req),
+ pa, /* sense buffer pa */
+ SCSI_SENSE_BUFFERSIZE);
+
+ ret = snic_queue_wq_desc(snic, rqi->req, rqi->req_len);
+ if (ret)
+ SNIC_HOST_ERR(snic->shost,
+ "QIcmnd: Queuing Icmnd Failed. ret = %d\n",
+ ret);
+
+ return ret;
+} /* end of snic_queue_icmnd_req */
+
+/*
+ * snic_issue_scsi_req : Prepares IO request and Issues to FW.
+ */
+static int
+snic_issue_scsi_req(struct snic *snic,
+ struct snic_tgt *tgt,
+ struct scsi_cmnd *sc)
+{
+ struct snic_req_info *rqi = NULL;
+ int sg_cnt = 0;
+ int ret = 0;
+ u32 tag = snic_cmd_tag(sc);
+ u64 cmd_trc = 0, cmd_st_flags = 0;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags;
+
+ CMD_STATE(sc) = SNIC_IOREQ_NOT_INITED;
+ CMD_FLAGS(sc) = SNIC_NO_FLAGS;
+ sg_cnt = scsi_dma_map(sc);
+ if (sg_cnt < 0) {
+ SNIC_TRC((u16)snic->shost->host_no, tag, (ulong) sc, 0,
+ sc->cmnd[0], sg_cnt, CMD_STATE(sc));
+
+ SNIC_HOST_ERR(snic->shost, "issue_sc:Failed to map SG List.\n");
+ ret = -ENOMEM;
+
+ goto issue_sc_end;
+ }
+
+ rqi = snic_req_init(snic, sg_cnt);
+ if (!rqi) {
+ scsi_dma_unmap(sc);
+ ret = -ENOMEM;
+
+ goto issue_sc_end;
+ }
+
+ rqi->tgt_id = tgt->id;
+ rqi->sc = sc;
+
+ CMD_STATE(sc) = SNIC_IOREQ_PENDING;
+ CMD_SP(sc) = (char *) rqi;
+ cmd_trc = SNIC_TRC_CMD(sc);
+ CMD_FLAGS(sc) |= (SNIC_IO_INITIALIZED | SNIC_IO_ISSUED);
+ cmd_st_flags = SNIC_TRC_CMD_STATE_FLAGS(sc);
+ io_lock = snic_io_lock_hash(snic, sc);
+
+ /* create wq desc and enqueue it */
+ ret = snic_queue_icmnd_req(snic, rqi, sc, sg_cnt);
+ if (ret) {
+ SNIC_HOST_ERR(snic->shost,
+ "issue_sc: icmnd qing Failed for sc %p, err %d\n",
+ sc, ret);
+
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ CMD_SP(sc) = NULL;
+ CMD_STATE(sc) = SNIC_IOREQ_COMPLETE;
+ CMD_FLAGS(sc) &= ~SNIC_IO_ISSUED; /* turn off the flag */
+ spin_unlock_irqrestore(io_lock, flags);
+
+ if (rqi)
+ snic_release_req_buf(snic, rqi, sc);
+
+ SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, 0, 0, 0,
+ SNIC_TRC_CMD_STATE_FLAGS(sc));
+ } else {
+ u32 io_sz = scsi_bufflen(sc) >> 9;
+ u32 qtime = jiffies - rqi->start_time;
+ struct snic_io_stats *iostats = &snic->s_stats.io;
+
+ if (io_sz > atomic64_read(&iostats->max_io_sz))
+ atomic64_set(&iostats->max_io_sz, io_sz);
+
+ if (qtime > atomic64_read(&iostats->max_qtime))
+ atomic64_set(&iostats->max_qtime, qtime);
+
+ SNIC_SCSI_DBG(snic->shost,
+ "issue_sc:sc %p, tag %d queued to WQ.\n",
+ sc, tag);
+
+ SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, (ulong) rqi,
+ sg_cnt, cmd_trc, cmd_st_flags);
+ }
+
+issue_sc_end:
+
+ return ret;
+} /* end of snic_issue_scsi_req */
+
+
+/*
+ * snic_queuecommand
+ * Routine to send a scsi cdb to LLD
+ * Called with host_lock held and interrupts disabled
+ */
+int
+snic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc)
+{
+ struct snic_tgt *tgt = NULL;
+ struct snic *snic = shost_priv(shost);
+ int ret;
+
+ tgt = starget_to_tgt(scsi_target(sc->device));
+ ret = snic_tgt_chkready(tgt);
+ if (ret) {
+ SNIC_HOST_ERR(shost, "Tgt %p id %d Not Ready.\n", tgt, tgt->id);
+ atomic64_inc(&snic->s_stats.misc.tgt_not_rdy);
+ sc->result = ret;
+ sc->scsi_done(sc);
+
+ return 0;
+ }
+
+ if (snic_get_state(snic) != SNIC_ONLINE) {
+ SNIC_HOST_ERR(shost, "snic state is %s\n",
+ snic_state_str[snic_get_state(snic)]);
+
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
+ atomic_inc(&snic->ios_inflight);
+
+ SNIC_SCSI_DBG(shost, "sc %p Tag %d (sc %0x) lun %lld in snic_qcmd\n",
+ sc, snic_cmd_tag(sc), sc->cmnd[0], sc->device->lun);
+
+ memset(scsi_cmd_priv(sc), 0, sizeof(struct snic_internal_io_state));
+
+ ret = snic_issue_scsi_req(snic, tgt, sc);
+ if (ret) {
+ SNIC_HOST_ERR(shost, "Failed to Q, Scsi Req w/ err %d.\n", ret);
+ ret = SCSI_MLQUEUE_HOST_BUSY;
+ } else
+ snic_stats_update_active_ios(&snic->s_stats);
+
+ atomic_dec(&snic->ios_inflight);
+
+ return ret;
+} /* end of snic_queuecommand */
+
+/*
+ * snic_process_abts_pending_state:
+ * caller should hold IO lock
+ */
+static void
+snic_proc_tmreq_pending_state(struct snic *snic,
+ struct scsi_cmnd *sc,
+ u8 cmpl_status)
+{
+ int state = CMD_STATE(sc);
+
+ if (state == SNIC_IOREQ_ABTS_PENDING)
+ CMD_FLAGS(sc) |= SNIC_IO_ABTS_PENDING;
+ else if (state == SNIC_IOREQ_LR_PENDING)
+ CMD_FLAGS(sc) |= SNIC_DEV_RST_PENDING;
+ else
+ SNIC_BUG_ON(1);
+
+ switch (cmpl_status) {
+ case SNIC_STAT_IO_SUCCESS:
+ CMD_FLAGS(sc) |= SNIC_IO_DONE;
+ break;
+
+ case SNIC_STAT_ABORTED:
+ CMD_FLAGS(sc) |= SNIC_IO_ABORTED;
+ break;
+
+ default:
+ SNIC_BUG_ON(1);
+ }
+}
+
+/*
+ * snic_process_io_failed_state:
+ * Processes IO's error states
+ */
+static void
+snic_process_io_failed_state(struct snic *snic,
+ struct snic_icmnd_cmpl *icmnd_cmpl,
+ struct scsi_cmnd *sc,
+ u8 cmpl_stat)
+{
+ int res = 0;
+
+ switch (cmpl_stat) {
+ case SNIC_STAT_TIMEOUT: /* Req was timedout */
+ atomic64_inc(&snic->s_stats.misc.io_tmo);
+ res = DID_TIME_OUT;
+ break;
+
+ case SNIC_STAT_ABORTED: /* Req was aborted */
+ atomic64_inc(&snic->s_stats.misc.io_aborted);
+ res = DID_ABORT;
+ break;
+
+ case SNIC_STAT_DATA_CNT_MISMATCH:/* Recv/Sent more/less data than exp */
+ atomic64_inc(&snic->s_stats.misc.data_cnt_mismat);
+ scsi_set_resid(sc, le32_to_cpu(icmnd_cmpl->resid));
+ res = DID_ERROR;
+ break;
+
+ case SNIC_STAT_OUT_OF_RES: /* Out of resources to complete request */
+ atomic64_inc(&snic->s_stats.fw.out_of_res);
+ res = DID_REQUEUE;
+ break;
+
+ case SNIC_STAT_IO_NOT_FOUND: /* Requested I/O was not found */
+ atomic64_inc(&snic->s_stats.io.io_not_found);
+ res = DID_ERROR;
+ break;
+
+ case SNIC_STAT_SGL_INVALID: /* Req was aborted to due to sgl error*/
+ atomic64_inc(&snic->s_stats.misc.sgl_inval);
+ res = DID_ERROR;
+ break;
+
+ case SNIC_STAT_FW_ERR: /* Req terminated due to FW Error */
+ atomic64_inc(&snic->s_stats.fw.io_errs);
+ res = DID_ERROR;
+ break;
+
+ case SNIC_STAT_SCSI_ERR: /* FW hits SCSI Error */
+ atomic64_inc(&snic->s_stats.fw.scsi_errs);
+ break;
+
+ case SNIC_STAT_NOT_READY: /* XPT yet to initialize */
+ case SNIC_STAT_DEV_OFFLINE: /* Device offline */
+ res = DID_NO_CONNECT;
+ break;
+
+ case SNIC_STAT_INVALID_HDR: /* Hdr contains invalid data */
+ case SNIC_STAT_INVALID_PARM: /* Some param in req is invalid */
+ case SNIC_STAT_REQ_NOT_SUP: /* Req type is not supported */
+ case SNIC_STAT_CMND_REJECT: /* Req rejected */
+ case SNIC_STAT_FATAL_ERROR: /* XPT Error */
+ default:
+ SNIC_SCSI_DBG(snic->shost,
+ "Invalid Hdr/Param or Req Not Supported or Cmnd Rejected or Device Offline. or Unknown\n");
+ res = DID_ERROR;
+ break;
+ }
+
+ SNIC_HOST_ERR(snic->shost, "fw returns failed status %s flags 0x%llx\n",
+ snic_io_status_to_str(cmpl_stat), CMD_FLAGS(sc));
+
+ /* Set sc->result */
+ sc->result = (res << 16) | icmnd_cmpl->scsi_status;
+} /* end of snic_process_io_failed_state */
+
+/*
+ * snic_tmreq_pending : is task management in progress.
+ */
+static int
+snic_tmreq_pending(struct scsi_cmnd *sc)
+{
+ int state = CMD_STATE(sc);
+
+ return ((state == SNIC_IOREQ_ABTS_PENDING) ||
+ (state == SNIC_IOREQ_LR_PENDING));
+}
+
+/*
+ * snic_process_icmnd_cmpl_status:
+ * Caller should hold io_lock
+ */
+static int
+snic_process_icmnd_cmpl_status(struct snic *snic,
+ struct snic_icmnd_cmpl *icmnd_cmpl,
+ u8 cmpl_stat,
+ struct scsi_cmnd *sc)
+{
+ u8 scsi_stat = icmnd_cmpl->scsi_status;
+ u64 xfer_len = 0;
+ int ret = 0;
+
+ /* Mark the IO as complete */
+ CMD_STATE(sc) = SNIC_IOREQ_COMPLETE;
+
+ if (likely(cmpl_stat == SNIC_STAT_IO_SUCCESS)) {
+ sc->result = (DID_OK << 16) | scsi_stat;
+
+ xfer_len = scsi_bufflen(sc);
+
+ /* Update SCSI Cmd with resid value */
+ scsi_set_resid(sc, le32_to_cpu(icmnd_cmpl->resid));
+
+ if (icmnd_cmpl->flags & SNIC_ICMND_CMPL_UNDR_RUN) {
+ xfer_len -= le32_to_cpu(icmnd_cmpl->resid);
+ atomic64_inc(&snic->s_stats.misc.io_under_run);
+ }
+
+ if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
+ atomic64_inc(&snic->s_stats.misc.qfull);
+
+ ret = 0;
+ } else {
+ snic_process_io_failed_state(snic, icmnd_cmpl, sc, cmpl_stat);
+ atomic64_inc(&snic->s_stats.io.fail);
+ SNIC_HOST_ERR(snic->shost,
+ "icmnd_cmpl: IO Failed : Hdr Status %s flags 0x%llx\n",
+ snic_io_status_to_str(cmpl_stat), CMD_FLAGS(sc));
+ ret = 1;
+ }
+
+ return ret;
+} /* end of snic_process_icmnd_cmpl_status */
+
+
+/*
+ * snic_icmnd_cmpl_handler
+ * Routine to handle icmnd completions
+ */
+static void
+snic_icmnd_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
+{
+ u8 typ, hdr_stat;
+ u32 cmnd_id, hid;
+ ulong ctx;
+ struct scsi_cmnd *sc = NULL;
+ struct snic_icmnd_cmpl *icmnd_cmpl = NULL;
+ struct snic_host_req *req = NULL;
+ struct snic_req_info *rqi = NULL;
+ unsigned long flags, start_time;
+ spinlock_t *io_lock;
+ u8 sc_stat = 0;
+
+ snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
+ icmnd_cmpl = &fwreq->u.icmnd_cmpl;
+ sc_stat = icmnd_cmpl->scsi_status;
+
+ SNIC_SCSI_DBG(snic->shost,
+ "Icmnd_cmpl: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x,i ctx = %lx\n",
+ typ, hdr_stat, cmnd_id, hid, ctx);
+
+ if (cmnd_id >= snic->max_tag_id) {
+ SNIC_HOST_ERR(snic->shost,
+ "Icmnd_cmpl:Tag Error:Out of Range Tag %d, hdr status = %s\n",
+ cmnd_id, snic_io_status_to_str(hdr_stat));
+ return;
+ }
+
+ sc = scsi_host_find_tag(snic->shost, cmnd_id);
+ WARN_ON_ONCE(!sc);
+
+ if (!sc) {
+ atomic64_inc(&snic->s_stats.io.sc_null);
+ SNIC_HOST_ERR(snic->shost,
+ "Icmnd_cmpl: Scsi Cmnd Not found, sc = NULL Hdr Status = %s tag = 0x%x fwreq = 0x%p\n",
+ snic_io_status_to_str(hdr_stat),
+ cmnd_id,
+ fwreq);
+
+ SNIC_TRC(snic->shost->host_no, cmnd_id, 0,
+ ((u64)hdr_stat << 16 |
+ (u64)sc_stat << 8 | (u64)icmnd_cmpl->flags),
+ (ulong) fwreq, le32_to_cpu(icmnd_cmpl->resid), ctx);
+
+ return;
+ }
+
+ io_lock = snic_io_lock_hash(snic, sc);
+
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ SNIC_SCSI_DBG(snic->shost,
+ "Icmnd_cmpl:lun %lld sc %p cmd %xtag %d flags 0x%llx rqi %p\n",
+ sc->device->lun, sc, sc->cmnd[0], snic_cmd_tag(sc),
+ CMD_FLAGS(sc), rqi);
+
+ SNIC_BUG_ON(rqi != (struct snic_req_info *)ctx);
+ WARN_ON_ONCE(req);
+ if (!rqi) {
+ atomic64_inc(&snic->s_stats.io.req_null);
+ CMD_FLAGS(sc) |= SNIC_IO_REQ_NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ SNIC_HOST_ERR(snic->shost,
+ "Icmnd_cmpl:Host Req Not Found(null), Hdr Status %s, Tag 0x%x, sc 0x%p flags 0x%llx\n",
+ snic_io_status_to_str(hdr_stat),
+ cmnd_id, sc, CMD_FLAGS(sc));
+ return;
+ }
+
+ rqi = (struct snic_req_info *) ctx;
+ start_time = rqi->start_time;
+
+ /* firmware completed the io */
+ rqi->io_cmpl = 1;
+
+ /*
+ * if SCSI-ML has already issued abort on this command,
+ * ignore completion of the IO. The abts path will clean it up
+ */
+ if (unlikely(snic_tmreq_pending(sc))) {
+ snic_proc_tmreq_pending_state(snic, sc, hdr_stat);
+ spin_unlock_irqrestore(io_lock, flags);
+
+ snic_stats_update_io_cmpl(&snic->s_stats);
+
+ /* Expected value is SNIC_STAT_ABORTED */
+ if (likely(hdr_stat == SNIC_STAT_ABORTED))
+ return;
+
+ SNIC_SCSI_DBG(snic->shost,
+ "icmnd_cmpl:TM Req Pending(%s), Hdr Status %s sc 0x%p scsi status %x resid %d flags 0x%llx\n",
+ snic_ioreq_state_to_str(CMD_STATE(sc)),
+ snic_io_status_to_str(hdr_stat),
+ sc, sc_stat, le32_to_cpu(icmnd_cmpl->resid),
+ CMD_FLAGS(sc));
+
+ SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
+ jiffies_to_msecs(jiffies - start_time), (ulong) fwreq,
+ SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
+
+ return;
+ }
+
+ if (snic_process_icmnd_cmpl_status(snic, icmnd_cmpl, hdr_stat, sc)) {
+ scsi_print_command(sc);
+ SNIC_HOST_ERR(snic->shost,
+ "icmnd_cmpl:IO Failed, sc 0x%p Tag %d Cmd %x Hdr Status %s flags 0x%llx\n",
+ sc, sc->cmnd[0], cmnd_id,
+ snic_io_status_to_str(hdr_stat), CMD_FLAGS(sc));
+ }
+
+ /* Break link with the SCSI Command */
+ CMD_SP(sc) = NULL;
+ CMD_FLAGS(sc) |= SNIC_IO_DONE;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* For now, consider only successful IO. */
+ snic_calc_io_process_time(snic, rqi);
+
+ snic_release_req_buf(snic, rqi, sc);
+
+ SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
+ jiffies_to_msecs(jiffies - start_time), (ulong) fwreq,
+ SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
+
+
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+
+ snic_stats_update_io_cmpl(&snic->s_stats);
+} /* end of snic_icmnd_cmpl_handler */
+
+static void
+snic_proc_dr_cmpl_locked(struct snic *snic,
+ struct snic_fw_req *fwreq,
+ u8 cmpl_stat,
+ u32 cmnd_id,
+ struct scsi_cmnd *sc)
+{
+ struct snic_req_info *rqi = (struct snic_req_info *) CMD_SP(sc);
+ u32 start_time = rqi->start_time;
+
+ CMD_LR_STATUS(sc) = cmpl_stat;
+
+ SNIC_SCSI_DBG(snic->shost, "itmf_cmpl: Cmd State = %s\n",
+ snic_ioreq_state_to_str(CMD_STATE(sc)));
+
+ if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) {
+ CMD_FLAGS(sc) |= SNIC_DEV_RST_ABTS_PENDING;
+
+ SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
+ jiffies_to_msecs(jiffies - start_time),
+ (ulong) fwreq, 0, SNIC_TRC_CMD_STATE_FLAGS(sc));
+
+ SNIC_SCSI_DBG(snic->shost,
+ "itmf_cmpl: Terminate Pending Dev Reset Cmpl Recvd.id %x, status %s flags 0x%llx\n",
+ (int)(cmnd_id & SNIC_TAG_MASK),
+ snic_io_status_to_str(cmpl_stat),
+ CMD_FLAGS(sc));
+
+ return;
+ }
+
+
+ if (CMD_FLAGS(sc) & SNIC_DEV_RST_TIMEDOUT) {
+ SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
+ jiffies_to_msecs(jiffies - start_time),
+ (ulong) fwreq, 0, SNIC_TRC_CMD_STATE_FLAGS(sc));
+
+ SNIC_SCSI_DBG(snic->shost,
+ "itmf_cmpl:Dev Reset Completion Received after timeout. id %d cmpl status %s flags 0x%llx\n",
+ (int)(cmnd_id & SNIC_TAG_MASK),
+ snic_io_status_to_str(cmpl_stat),
+ CMD_FLAGS(sc));
+
+ return;
+ }
+
+ CMD_STATE(sc) = SNIC_IOREQ_LR_COMPLETE;
+ CMD_FLAGS(sc) |= SNIC_DEV_RST_DONE;
+
+ SNIC_SCSI_DBG(snic->shost,
+ "itmf_cmpl:Dev Reset Cmpl Recvd id %d cmpl status %s flags 0x%llx\n",
+ (int)(cmnd_id & SNIC_TAG_MASK),
+ snic_io_status_to_str(cmpl_stat),
+ CMD_FLAGS(sc));
+
+ if (rqi->dr_done)
+ complete(rqi->dr_done);
+} /* end of snic_proc_dr_cmpl_locked */
+
+/*
+ * snic_update_abort_stats : Updates abort stats based on completion status.
+ */
+static void
+snic_update_abort_stats(struct snic *snic, u8 cmpl_stat)
+{
+ struct snic_abort_stats *abt_stats = &snic->s_stats.abts;
+
+ SNIC_SCSI_DBG(snic->shost, "Updating Abort stats.\n");
+
+ switch (cmpl_stat) {
+ case SNIC_STAT_IO_SUCCESS:
+ break;
+
+ case SNIC_STAT_TIMEOUT:
+ atomic64_inc(&abt_stats->fw_tmo);
+ break;
+
+ case SNIC_STAT_IO_NOT_FOUND:
+ atomic64_inc(&abt_stats->io_not_found);
+ break;
+
+ default:
+ atomic64_inc(&abt_stats->fail);
+ break;
+ }
+}
+
+static int
+snic_process_itmf_cmpl(struct snic *snic,
+ struct snic_fw_req *fwreq,
+ u32 cmnd_id,
+ u8 cmpl_stat,
+ struct scsi_cmnd *sc)
+{
+ struct snic_req_info *rqi = NULL;
+ u32 tm_tags = 0;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags;
+ u32 start_time = 0;
+ int ret = 0;
+
+ io_lock = snic_io_lock_hash(snic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ WARN_ON_ONCE(!rqi);
+
+ if (!rqi) {
+ atomic64_inc(&snic->s_stats.io.req_null);
+ spin_unlock_irqrestore(io_lock, flags);
+ CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
+ SNIC_HOST_ERR(snic->shost,
+ "itmf_cmpl: rqi is null,Hdr stat = %s Tag = 0x%x sc = 0x%p flags 0x%llx\n",
+ snic_io_status_to_str(cmpl_stat), cmnd_id, sc,
+ CMD_FLAGS(sc));
+
+ return ret;
+ }
+
+ /* Extract task management flags */
+ tm_tags = cmnd_id & ~(SNIC_TAG_MASK);
+
+ start_time = rqi->start_time;
+ cmnd_id &= (SNIC_TAG_MASK);
+
+ switch (tm_tags) {
+ case SNIC_TAG_ABORT:
+ /* Abort only issued on cmd */
+ snic_update_abort_stats(snic, cmpl_stat);
+
+ if (CMD_STATE(sc) != SNIC_IOREQ_ABTS_PENDING) {
+ /* This is a late completion. Ignore it. */
+ ret = -1;
+ spin_unlock_irqrestore(io_lock, flags);
+ break;
+ }
+
+ CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE;
+ CMD_ABTS_STATUS(sc) = cmpl_stat;
+ CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_DONE;
+
+ SNIC_SCSI_DBG(snic->shost,
+ "itmf_cmpl:Abort Cmpl Recvd.Tag 0x%x Status %s flags 0x%llx\n",
+ cmnd_id,
+ snic_io_status_to_str(cmpl_stat),
+ CMD_FLAGS(sc));
+
+ /*
+ * If scsi_eh thread is blocked waiting for abts complete,
+ * signal completion to it. IO will be cleaned in the thread,
+ * else clean it in this context.
+ */
+ if (rqi->abts_done) {
+ complete(rqi->abts_done);
+ spin_unlock_irqrestore(io_lock, flags);
+
+ break; /* jump out */
+ }
+
+ CMD_SP(sc) = NULL;
+ sc->result = (DID_ERROR << 16);
+ SNIC_SCSI_DBG(snic->shost,
+ "itmf_cmpl: Completing IO. sc %p flags 0x%llx\n",
+ sc, CMD_FLAGS(sc));
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ snic_release_req_buf(snic, rqi, sc);
+
+ if (sc->scsi_done) {
+ SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
+ jiffies_to_msecs(jiffies - start_time),
+ (ulong) fwreq, SNIC_TRC_CMD(sc),
+ SNIC_TRC_CMD_STATE_FLAGS(sc));
+
+ sc->scsi_done(sc);
+ }
+
+ break;
+
+ case SNIC_TAG_DEV_RST:
+ case SNIC_TAG_DEV_RST | SNIC_TAG_IOCTL_DEV_RST:
+ snic_proc_dr_cmpl_locked(snic, fwreq, cmpl_stat, cmnd_id, sc);
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = 0;
+
+ break;
+
+ case SNIC_TAG_ABORT | SNIC_TAG_DEV_RST:
+ /* Abort and terminate completion of device reset req */
+
+ CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE;
+ CMD_ABTS_STATUS(sc) = cmpl_stat;
+ CMD_FLAGS(sc) |= SNIC_DEV_RST_DONE;
+
+ SNIC_SCSI_DBG(snic->shost,
+ "itmf_cmpl:dev reset abts cmpl recvd. id %d status %s flags 0x%llx\n",
+ cmnd_id, snic_io_status_to_str(cmpl_stat),
+ CMD_FLAGS(sc));
+
+ if (rqi->abts_done)
+ complete(rqi->abts_done);
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ break;
+
+ default:
+ spin_unlock_irqrestore(io_lock, flags);
+ SNIC_HOST_ERR(snic->shost,
+ "itmf_cmpl: Unknown TM tag bit 0x%x\n", tm_tags);
+
+ SNIC_HOST_ERR(snic->shost,
+ "itmf_cmpl:Unexpected itmf io stat %s Tag = 0x%x flags 0x%llx\n",
+ snic_ioreq_state_to_str(CMD_STATE(sc)),
+ cmnd_id,
+ CMD_FLAGS(sc));
+ ret = -1;
+ SNIC_BUG_ON(1);
+
+ break;
+ }
+
+ return ret;
+} /* end of snic_process_itmf_cmpl_status */
+
+/*
+ * snic_itmf_cmpl_handler.
+ * Routine to handle itmf completions.
+ */
+static void
+snic_itmf_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
+{
+ struct scsi_cmnd *sc = NULL;
+ struct snic_req_info *rqi = NULL;
+ struct snic_itmf_cmpl *itmf_cmpl = NULL;
+ ulong ctx;
+ u32 cmnd_id;
+ u32 hid;
+ u8 typ;
+ u8 hdr_stat;
+
+ snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
+ SNIC_SCSI_DBG(snic->shost,
+ "Itmf_cmpl: %s: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x,ctx = %lx\n",
+ __func__, typ, hdr_stat, cmnd_id, hid, ctx);
+
+ itmf_cmpl = &fwreq->u.itmf_cmpl;
+ SNIC_SCSI_DBG(snic->shost,
+ "Itmf_cmpl: nterm %u , flags 0x%x\n",
+ le32_to_cpu(itmf_cmpl->nterminated), itmf_cmpl->flags);
+
+ /* spl case, dev reset issued through ioctl */
+ if (cmnd_id & SNIC_TAG_IOCTL_DEV_RST) {
+ rqi = (struct snic_req_info *) ctx;
+ sc = rqi->sc;
+
+ goto ioctl_dev_rst;
+ }
+
+ if ((cmnd_id & SNIC_TAG_MASK) >= snic->max_tag_id) {
+ SNIC_HOST_ERR(snic->shost,
+ "Itmf_cmpl: Tag 0x%x out of Range,HdrStat %s\n",
+ cmnd_id, snic_io_status_to_str(hdr_stat));
+ SNIC_BUG_ON(1);
+
+ return;
+ }
+
+ sc = scsi_host_find_tag(snic->shost, cmnd_id & SNIC_TAG_MASK);
+ WARN_ON_ONCE(!sc);
+
+ioctl_dev_rst:
+ if (!sc) {
+ atomic64_inc(&snic->s_stats.io.sc_null);
+ SNIC_HOST_ERR(snic->shost,
+ "Itmf_cmpl: sc is NULL - Hdr Stat %s Tag 0x%x\n",
+ snic_io_status_to_str(hdr_stat), cmnd_id);
+
+ return;
+ }
+
+ snic_process_itmf_cmpl(snic, fwreq, cmnd_id, hdr_stat, sc);
+} /* end of snic_itmf_cmpl_handler */
+
+
+
+static void
+snic_hba_reset_scsi_cleanup(struct snic *snic, struct scsi_cmnd *sc)
+{
+ struct snic_stats *st = &snic->s_stats;
+ long act_ios = 0, act_fwreqs = 0;
+
+ SNIC_SCSI_DBG(snic->shost, "HBA Reset scsi cleanup.\n");
+ snic_scsi_cleanup(snic, snic_cmd_tag(sc));
+
+ /* Update stats on pending IOs */
+ act_ios = atomic64_read(&st->io.active);
+ atomic64_add(act_ios, &st->io.compl);
+ atomic64_sub(act_ios, &st->io.active);
+
+ act_fwreqs = atomic64_read(&st->fw.actv_reqs);
+ atomic64_sub(act_fwreqs, &st->fw.actv_reqs);
+}
+
+/*
+ * snic_hba_reset_cmpl_handler :
+ *
+ * Notes :
+ * 1. Cleanup all the scsi cmds, release all snic specific cmds
+ * 2. Issue Report Targets in case of SAN targets
+ */
+static int
+snic_hba_reset_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
+{
+ ulong ctx;
+ u32 cmnd_id;
+ u32 hid;
+ u8 typ;
+ u8 hdr_stat;
+ struct scsi_cmnd *sc = NULL;
+ struct snic_req_info *rqi = NULL;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags, gflags;
+ int ret = 0;
+
+ SNIC_HOST_INFO(snic->shost,
+ "reset_cmpl:HBA Reset Completion received.\n");
+
+ snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
+ SNIC_SCSI_DBG(snic->shost,
+ "reset_cmpl: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x, ctx = %lx\n",
+ typ, hdr_stat, cmnd_id, hid, ctx);
+
+ /* spl case, host reset issued through ioctl */
+ if (cmnd_id == SCSI_NO_TAG) {
+ rqi = (struct snic_req_info *) ctx;
+ sc = rqi->sc;
+
+ goto ioctl_hba_rst;
+ }
+
+ if (cmnd_id >= snic->max_tag_id) {
+ SNIC_HOST_ERR(snic->shost,
+ "reset_cmpl: Tag 0x%x out of Range,HdrStat %s\n",
+ cmnd_id, snic_io_status_to_str(hdr_stat));
+ SNIC_BUG_ON(1);
+
+ return 1;
+ }
+
+ sc = scsi_host_find_tag(snic->shost, cmnd_id);
+ioctl_hba_rst:
+ if (!sc) {
+ atomic64_inc(&snic->s_stats.io.sc_null);
+ SNIC_HOST_ERR(snic->shost,
+ "reset_cmpl: sc is NULL - Hdr Stat %s Tag 0x%x\n",
+ snic_io_status_to_str(hdr_stat), cmnd_id);
+ ret = 1;
+
+ return ret;
+ }
+
+ io_lock = snic_io_lock_hash(snic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ if (!snic->remove_wait) {
+ spin_unlock_irqrestore(io_lock, flags);
+ SNIC_HOST_ERR(snic->shost,
+ "reset_cmpl:host reset completed after timout\n");
+ ret = 1;
+
+ return ret;
+ }
+
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ WARN_ON_ONCE(!rqi);
+
+ if (!rqi) {
+ atomic64_inc(&snic->s_stats.io.req_null);
+ spin_unlock_irqrestore(io_lock, flags);
+ CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
+ SNIC_HOST_ERR(snic->shost,
+ "reset_cmpl: rqi is null,Hdr stat %s Tag 0x%x sc 0x%p flags 0x%llx\n",
+ snic_io_status_to_str(hdr_stat), cmnd_id, sc,
+ CMD_FLAGS(sc));
+
+ ret = 1;
+
+ return ret;
+ }
+ /* stats */
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* scsi cleanup */
+ snic_hba_reset_scsi_cleanup(snic, sc);
+
+ SNIC_BUG_ON(snic_get_state(snic) != SNIC_OFFLINE &&
+ snic_get_state(snic) != SNIC_FWRESET);
+
+ /* Careful locking between snic_lock and io lock */
+ spin_lock_irqsave(io_lock, flags);
+ spin_lock_irqsave(&snic->snic_lock, gflags);
+ if (snic_get_state(snic) == SNIC_FWRESET)
+ snic_set_state(snic, SNIC_ONLINE);
+ spin_unlock_irqrestore(&snic->snic_lock, gflags);
+
+ if (snic->remove_wait)
+ complete(snic->remove_wait);
+
+ spin_unlock_irqrestore(io_lock, flags);
+ atomic64_inc(&snic->s_stats.reset.hba_reset_cmpl);
+
+ ret = 0;
+ /* Rediscovery is for SAN */
+ if (snic->config.xpt_type == SNIC_DAS)
+ return ret;
+
+ SNIC_SCSI_DBG(snic->shost, "reset_cmpl: Queuing discovery work.\n");
+ queue_work(snic_glob->event_q, &snic->disc_work);
+
+ return ret;
+}
+
+static void
+snic_msg_ack_handler(struct snic *snic, struct snic_fw_req *fwreq)
+{
+ SNIC_HOST_INFO(snic->shost, "Message Ack Received.\n");
+
+ SNIC_ASSERT_NOT_IMPL(1);
+}
+
+static void
+snic_aen_handler(struct snic *snic, struct snic_fw_req *fwreq)
+{
+ u8 typ, hdr_stat;
+ u32 cmnd_id, hid;
+ ulong ctx;
+ struct snic_async_evnotify *aen = &fwreq->u.async_ev;
+ u32 event_id = 0;
+
+ snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
+ SNIC_SCSI_DBG(snic->shost,
+ "aen: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x, ctx = %lx\n",
+ typ, hdr_stat, cmnd_id, hid, ctx);
+
+ event_id = le32_to_cpu(aen->ev_id);
+
+ switch (event_id) {
+ case SNIC_EV_TGT_OFFLINE:
+ SNIC_HOST_INFO(snic->shost, "aen:TGT_OFFLINE Event Recvd.\n");
+ break;
+
+ case SNIC_EV_TGT_ONLINE:
+ SNIC_HOST_INFO(snic->shost, "aen:TGT_ONLINE Event Recvd.\n");
+ break;
+
+ case SNIC_EV_LUN_OFFLINE:
+ SNIC_HOST_INFO(snic->shost, "aen:LUN_OFFLINE Event Recvd.\n");
+ break;
+
+ case SNIC_EV_LUN_ONLINE:
+ SNIC_HOST_INFO(snic->shost, "aen:LUN_ONLINE Event Recvd.\n");
+ break;
+
+ case SNIC_EV_CONF_CHG:
+ SNIC_HOST_INFO(snic->shost, "aen:Config Change Event Recvd.\n");
+ break;
+
+ case SNIC_EV_TGT_ADDED:
+ SNIC_HOST_INFO(snic->shost, "aen:TGT_ADD Event Recvd.\n");
+ break;
+
+ case SNIC_EV_TGT_DELTD:
+ SNIC_HOST_INFO(snic->shost, "aen:TGT_DEL Event Recvd.\n");
+ break;
+
+ case SNIC_EV_LUN_ADDED:
+ SNIC_HOST_INFO(snic->shost, "aen:LUN_ADD Event Recvd.\n");
+ break;
+
+ case SNIC_EV_LUN_DELTD:
+ SNIC_HOST_INFO(snic->shost, "aen:LUN_DEL Event Recvd.\n");
+ break;
+
+ case SNIC_EV_DISC_CMPL:
+ SNIC_HOST_INFO(snic->shost, "aen:DISC_CMPL Event Recvd.\n");
+ break;
+
+ default:
+ SNIC_HOST_INFO(snic->shost, "aen:Unknown Event Recvd.\n");
+ SNIC_BUG_ON(1);
+ break;
+ }
+
+ SNIC_ASSERT_NOT_IMPL(1);
+} /* end of snic_aen_handler */
+
+/*
+ * snic_io_cmpl_handler
+ * Routine to process CQ entries(IO Completions) posted by fw.
+ */
+static int
+snic_io_cmpl_handler(struct vnic_dev *vdev,
+ unsigned int cq_idx,
+ struct snic_fw_req *fwreq)
+{
+ struct snic *snic = svnic_dev_priv(vdev);
+ u64 start = jiffies, cmpl_time;
+
+ snic_print_desc(__func__, (char *)fwreq, sizeof(*fwreq));
+
+ /* Update FW Stats */
+ if ((fwreq->hdr.type >= SNIC_RSP_REPORT_TGTS_CMPL) &&
+ (fwreq->hdr.type <= SNIC_RSP_BOOT_LUNS_CMPL))
+ atomic64_dec(&snic->s_stats.fw.actv_reqs);
+
+ SNIC_BUG_ON((fwreq->hdr.type > SNIC_RSP_BOOT_LUNS_CMPL) &&
+ (fwreq->hdr.type < SNIC_MSG_ASYNC_EVNOTIFY));
+
+ /* Check for snic subsys errors */
+ switch (fwreq->hdr.status) {
+ case SNIC_STAT_NOT_READY: /* XPT yet to initialize */
+ SNIC_HOST_ERR(snic->shost,
+ "sNIC SubSystem is NOT Ready.\n");
+ break;
+
+ case SNIC_STAT_FATAL_ERROR: /* XPT Error */
+ SNIC_HOST_ERR(snic->shost,
+ "sNIC SubSystem in Unrecoverable State.\n");
+ break;
+ }
+
+ switch (fwreq->hdr.type) {
+ case SNIC_RSP_EXCH_VER_CMPL:
+ snic_io_exch_ver_cmpl_handler(snic, fwreq);
+ break;
+
+ case SNIC_RSP_REPORT_TGTS_CMPL:
+ snic_report_tgt_cmpl_handler(snic, fwreq);
+ break;
+
+ case SNIC_RSP_ICMND_CMPL:
+ snic_icmnd_cmpl_handler(snic, fwreq);
+ break;
+
+ case SNIC_RSP_ITMF_CMPL:
+ snic_itmf_cmpl_handler(snic, fwreq);
+ break;
+
+ case SNIC_RSP_HBA_RESET_CMPL:
+ snic_hba_reset_cmpl_handler(snic, fwreq);
+ break;
+
+ case SNIC_MSG_ACK:
+ snic_msg_ack_handler(snic, fwreq);
+ break;
+
+ case SNIC_MSG_ASYNC_EVNOTIFY:
+ snic_aen_handler(snic, fwreq);
+ break;
+
+ default:
+ SNIC_BUG_ON(1);
+ SNIC_SCSI_DBG(snic->shost,
+ "Unknown Firmwqre completion request type %d\n",
+ fwreq->hdr.type);
+ break;
+ }
+
+ /* Update Stats */
+ cmpl_time = jiffies - start;
+ if (cmpl_time > atomic64_read(&snic->s_stats.io.max_cmpl_time))
+ atomic64_set(&snic->s_stats.io.max_cmpl_time, cmpl_time);
+
+ return 0;
+} /* end of snic_io_cmpl_handler */
+
+/*
+ * snic_fwcq_cmpl_handler
+ * Routine to process fwCQ
+ * This CQ is independent, and not associated with wq/rq/wq_copy queues
+ */
+int
+snic_fwcq_cmpl_handler(struct snic *snic, int io_cmpl_work)
+{
+ unsigned int num_ent = 0; /* number cq entries processed */
+ unsigned int cq_idx;
+ unsigned int nent_per_cq;
+ struct snic_misc_stats *misc_stats = &snic->s_stats.misc;
+
+ for (cq_idx = snic->wq_count; cq_idx < snic->cq_count; cq_idx++) {
+ nent_per_cq = vnic_cq_fw_service(&snic->cq[cq_idx],
+ snic_io_cmpl_handler,
+ io_cmpl_work);
+ num_ent += nent_per_cq;
+
+ if (nent_per_cq > atomic64_read(&misc_stats->max_cq_ents))
+ atomic64_set(&misc_stats->max_cq_ents, nent_per_cq);
+ }
+
+ return num_ent;
+} /* end of snic_fwcq_cmpl_handler */
+
+/*
+ * snic_queue_itmf_req: Common API to queue Task Management requests.
+ * Use rqi->tm_tag for passing special tags.
+ * @req_id : aborted request's tag, -1 for lun reset.
+ */
+static int
+snic_queue_itmf_req(struct snic *snic,
+ struct snic_host_req *tmreq,
+ struct scsi_cmnd *sc,
+ u32 tmf,
+ u32 req_id)
+{
+ struct snic_req_info *rqi = req_to_rqi(tmreq);
+ struct scsi_lun lun;
+ int tm_tag = snic_cmd_tag(sc) | rqi->tm_tag;
+ int ret = 0;
+
+ SNIC_BUG_ON(!rqi);
+ SNIC_BUG_ON(!rqi->tm_tag);
+
+ /* fill in lun info */
+ int_to_scsilun(sc->device->lun, &lun);
+
+ /* Initialize snic_host_req: itmf */
+ snic_itmf_init(tmreq,
+ tm_tag,
+ snic->config.hid,
+ (ulong) rqi,
+ 0 /* flags */,
+ req_id, /* Command to be aborted. */
+ rqi->tgt_id,
+ lun.scsi_lun,
+ tmf);
+
+ /*
+ * In case of multiple aborts on same cmd,
+ * use try_wait_for_completion and completion_done() to check
+ * whether it queues aborts even after completion of abort issued
+ * prior.SNIC_BUG_ON(completion_done(&rqi->done));
+ */
+
+ ret = snic_queue_wq_desc(snic, tmreq, sizeof(*tmreq));
+ if (ret)
+ SNIC_HOST_ERR(snic->shost,
+ "qitmf:Queuing ITMF(%d) Req sc %p, rqi %p, req_id %d tag %d Failed, ret = %d\n",
+ tmf, sc, rqi, req_id, snic_cmd_tag(sc), ret);
+ else
+ SNIC_SCSI_DBG(snic->shost,
+ "qitmf:Queuing ITMF(%d) Req sc %p, rqi %p, req_id %d, tag %d (req_id)- Success.",
+ tmf, sc, rqi, req_id, snic_cmd_tag(sc));
+
+ return ret;
+} /* end of snic_queue_itmf_req */
+
+static int
+snic_issue_tm_req(struct snic *snic,
+ struct snic_req_info *rqi,
+ struct scsi_cmnd *sc,
+ int tmf)
+{
+ struct snic_host_req *tmreq = NULL;
+ int req_id = 0, tag = snic_cmd_tag(sc);
+ int ret = 0;
+
+ if (snic_get_state(snic) == SNIC_FWRESET)
+ return -EBUSY;
+
+ atomic_inc(&snic->ios_inflight);
+
+ SNIC_SCSI_DBG(snic->shost,
+ "issu_tmreq: Task mgmt req %d. rqi %p w/ tag %x\n",
+ tmf, rqi, tag);
+
+
+ if (tmf == SNIC_ITMF_LUN_RESET) {
+ tmreq = snic_dr_req_init(snic, rqi);
+ req_id = SCSI_NO_TAG;
+ } else {
+ tmreq = snic_abort_req_init(snic, rqi);
+ req_id = tag;
+ }
+
+ if (!tmreq) {
+ ret = -ENOMEM;
+
+ goto tmreq_err;
+ }
+
+ ret = snic_queue_itmf_req(snic, tmreq, sc, tmf, req_id);
+ if (ret)
+ goto tmreq_err;
+
+ ret = 0;
+
+tmreq_err:
+ if (ret) {
+ SNIC_HOST_ERR(snic->shost,
+ "issu_tmreq: Queing ITMF(%d) Req, sc %p rqi %p req_id %d tag %x fails err = %d\n",
+ tmf, sc, rqi, req_id, tag, ret);
+ } else {
+ SNIC_SCSI_DBG(snic->shost,
+ "issu_tmreq: Queuing ITMF(%d) Req, sc %p, rqi %p, req_id %d tag %x - Success.\n",
+ tmf, sc, rqi, req_id, tag);
+ }
+
+ atomic_dec(&snic->ios_inflight);
+
+ return ret;
+}
+
+/*
+ * snic_queue_abort_req : Queues abort req to WQ
+ */
+static int
+snic_queue_abort_req(struct snic *snic,
+ struct snic_req_info *rqi,
+ struct scsi_cmnd *sc,
+ int tmf)
+{
+ SNIC_SCSI_DBG(snic->shost, "q_abtreq: sc %p, rqi %p, tag %x, tmf %d\n",
+ sc, rqi, snic_cmd_tag(sc), tmf);
+
+ /* Add special tag for abort */
+ rqi->tm_tag |= SNIC_TAG_ABORT;
+
+ return snic_issue_tm_req(snic, rqi, sc, tmf);
+}
+
+/*
+ * snic_abort_finish : called by snic_abort_cmd on queuing abort successfully.
+ */
+static int
+snic_abort_finish(struct snic *snic, struct scsi_cmnd *sc)
+{
+ struct snic_req_info *rqi = NULL;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags;
+ int ret = 0, tag = snic_cmd_tag(sc);
+
+ io_lock = snic_io_lock_hash(snic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (!rqi) {
+ atomic64_inc(&snic->s_stats.io.req_null);
+ CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
+
+ SNIC_SCSI_DBG(snic->shost,
+ "abt_fini:req info is null tag 0x%x, sc 0x%p flags 0x%llx\n",
+ tag, sc, CMD_FLAGS(sc));
+ ret = FAILED;
+
+ goto abort_fail;
+ }
+
+ rqi->abts_done = NULL;
+
+ ret = FAILED;
+
+ /* Check the abort status. */
+ switch (CMD_ABTS_STATUS(sc)) {
+ case SNIC_INVALID_CODE:
+ /* Firmware didn't complete abort req, timedout */
+ CMD_FLAGS(sc) |= SNIC_IO_ABTS_TIMEDOUT;
+ atomic64_inc(&snic->s_stats.abts.drv_tmo);
+ SNIC_SCSI_DBG(snic->shost,
+ "abt_fini:sc %p Tag %x Driver Timeout.flags 0x%llx\n",
+ sc, snic_cmd_tag(sc), CMD_FLAGS(sc));
+ /* do not release snic request in timedout case */
+ rqi = NULL;
+
+ goto abort_fail;
+
+ case SNIC_STAT_IO_SUCCESS:
+ case SNIC_STAT_IO_NOT_FOUND:
+ ret = SUCCESS;
+ break;
+
+ default:
+ /* Firmware completed abort with error */
+ ret = FAILED;
+ break;
+ }
+
+ CMD_SP(sc) = NULL;
+ SNIC_HOST_INFO(snic->shost,
+ "abt_fini: Tag %x, Cmpl Status %s flags 0x%llx\n",
+ tag, snic_io_status_to_str(CMD_ABTS_STATUS(sc)),
+ CMD_FLAGS(sc));
+
+abort_fail:
+ spin_unlock_irqrestore(io_lock, flags);
+ if (rqi)
+ snic_release_req_buf(snic, rqi, sc);
+
+ return ret;
+} /* end of snic_abort_finish */
+
+/*
+ * snic_send_abort_and_wait : Issues Abort, and Waits
+ */
+static int
+snic_send_abort_and_wait(struct snic *snic, struct scsi_cmnd *sc)
+{
+ struct snic_req_info *rqi = NULL;
+ enum snic_ioreq_state sv_state;
+ struct snic_tgt *tgt = NULL;
+ spinlock_t *io_lock = NULL;
+ DECLARE_COMPLETION_ONSTACK(tm_done);
+ unsigned long flags;
+ int ret = 0, tmf = 0, tag = snic_cmd_tag(sc);
+
+ tgt = starget_to_tgt(scsi_target(sc->device));
+ if ((snic_tgt_chkready(tgt) != 0) && (tgt->tdata.typ == SNIC_TGT_SAN))
+ tmf = SNIC_ITMF_ABTS_TASK_TERM;
+ else
+ tmf = SNIC_ITMF_ABTS_TASK;
+
+ /* stats */
+
+ io_lock = snic_io_lock_hash(snic, sc);
+
+ /*
+ * Avoid a race between SCSI issuing the abort and the device
+ * completing the command.
+ *
+ * If the command is already completed by fw_cmpl code,
+ * we just return SUCCESS from here. This means that the abort
+ * succeeded. In the SCSI ML, since the timeout for command has
+ * happend, the completion wont actually complete the command
+ * and it will be considered as an aborted command
+ *
+ * The CMD_SP will not be cleared except while holding io_lock
+ */
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (!rqi) {
+ spin_unlock_irqrestore(io_lock, flags);
+
+ SNIC_HOST_ERR(snic->shost,
+ "abt_cmd: rqi is null. Tag %d flags 0x%llx\n",
+ tag, CMD_FLAGS(sc));
+
+ ret = SUCCESS;
+
+ goto send_abts_end;
+ }
+
+ rqi->abts_done = &tm_done;
+ if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+
+ ret = 0;
+ goto abts_pending;
+ }
+ SNIC_BUG_ON(!rqi->abts_done);
+
+ /* Save Command State, should be restored on failed to Queue. */
+ sv_state = CMD_STATE(sc);
+
+ /*
+ * Command is still pending, need to abort it
+ * If the fw completes the command after this point,
+ * the completion won't be done till mid-layer, since abot
+ * has already started.
+ */
+ CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING;
+ CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE;
+
+ SNIC_SCSI_DBG(snic->shost, "send_abt_cmd: TAG 0x%x\n", tag);
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* Now Queue the abort command to firmware */
+ ret = snic_queue_abort_req(snic, rqi, sc, tmf);
+ if (ret) {
+ SNIC_HOST_ERR(snic->shost,
+ "send_abt_cmd: IO w/ Tag 0x%x fail w/ err %d flags 0x%llx\n",
+ tag, ret, CMD_FLAGS(sc));
+
+ spin_lock_irqsave(io_lock, flags);
+ /* Restore Command's previous state */
+ CMD_STATE(sc) = sv_state;
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (rqi)
+ rqi->abts_done = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = FAILED;
+
+ goto send_abts_end;
+ }
+
+ spin_lock_irqsave(io_lock, flags);
+ if (tmf == SNIC_ITMF_ABTS_TASK) {
+ CMD_FLAGS(sc) |= SNIC_IO_ABTS_ISSUED;
+ atomic64_inc(&snic->s_stats.abts.num);
+ } else {
+ /* term stats */
+ CMD_FLAGS(sc) |= SNIC_IO_TERM_ISSUED;
+ }
+ spin_unlock_irqrestore(io_lock, flags);
+
+ SNIC_SCSI_DBG(snic->shost,
+ "send_abt_cmd: sc %p Tag %x flags 0x%llx\n",
+ sc, tag, CMD_FLAGS(sc));
+
+
+ ret = 0;
+
+abts_pending:
+ /*
+ * Queued an abort IO, wait for its completion.
+ * Once the fw completes the abort command, it will
+ * wakeup this thread.
+ */
+ wait_for_completion_timeout(&tm_done, SNIC_ABTS_TIMEOUT);
+
+send_abts_end:
+ return ret;
+} /* end of snic_send_abort_and_wait */
+
+/*
+ * This function is exported to SCSI for sending abort cmnds.
+ * A SCSI IO is represent by snic_ioreq in the driver.
+ * The snic_ioreq is linked to the SCSI Cmd, thus a link with the ULP'S IO
+ */
+int
+snic_abort_cmd(struct scsi_cmnd *sc)
+{
+ struct snic *snic = shost_priv(sc->device->host);
+ int ret = SUCCESS, tag = snic_cmd_tag(sc);
+ u32 start_time = jiffies;
+
+ SNIC_SCSI_DBG(snic->shost, "abt_cmd:sc %p :0x%x :req = %p :tag = %d\n",
+ sc, sc->cmnd[0], sc->request, tag);
+
+ if (unlikely(snic_get_state(snic) != SNIC_ONLINE)) {
+ SNIC_HOST_ERR(snic->shost,
+ "abt_cmd: tag %x Parent Devs are not rdy\n",
+ tag);
+ ret = FAST_IO_FAIL;
+
+ goto abort_end;
+ }
+
+
+ ret = snic_send_abort_and_wait(snic, sc);
+ if (ret)
+ goto abort_end;
+
+ ret = snic_abort_finish(snic, sc);
+
+abort_end:
+ SNIC_TRC(snic->shost->host_no, tag, (ulong) sc,
+ jiffies_to_msecs(jiffies - start_time), 0,
+ SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
+
+ SNIC_SCSI_DBG(snic->shost,
+ "abts: Abort Req Status = %s\n",
+ (ret == SUCCESS) ? "SUCCESS" :
+ ((ret == FAST_IO_FAIL) ? "FAST_IO_FAIL" : "FAILED"));
+
+ return ret;
+}
+
+
+
+static int
+snic_is_abts_pending(struct snic *snic, struct scsi_cmnd *lr_sc)
+{
+ struct snic_req_info *rqi = NULL;
+ struct scsi_cmnd *sc = NULL;
+ struct scsi_device *lr_sdev = NULL;
+ spinlock_t *io_lock = NULL;
+ u32 tag;
+ unsigned long flags;
+
+ if (lr_sc)
+ lr_sdev = lr_sc->device;
+
+ /* walk through the tag map, an dcheck if IOs are still pending in fw*/
+ for (tag = 0; tag < snic->max_tag_id; tag++) {
+ io_lock = snic_io_lock_tag(snic, tag);
+
+ spin_lock_irqsave(io_lock, flags);
+ sc = scsi_host_find_tag(snic->shost, tag);
+
+ if (!sc || (lr_sc && (sc->device != lr_sdev || sc == lr_sc))) {
+ spin_unlock_irqrestore(io_lock, flags);
+
+ continue;
+ }
+
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (!rqi) {
+ spin_unlock_irqrestore(io_lock, flags);
+
+ continue;
+ }
+
+ /*
+ * Found IO that is still pending w/ firmware and belongs to
+ * the LUN that is under reset, if lr_sc != NULL
+ */
+ SNIC_SCSI_DBG(snic->shost, "Found IO in %s on LUN\n",
+ snic_ioreq_state_to_str(CMD_STATE(sc)));
+
+ if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+
+ return 1;
+ }
+
+ spin_unlock_irqrestore(io_lock, flags);
+ }
+
+ return 0;
+} /* end of snic_is_abts_pending */
+
+static int
+snic_dr_clean_single_req(struct snic *snic,
+ u32 tag,
+ struct scsi_device *lr_sdev)
+{
+ struct snic_req_info *rqi = NULL;
+ struct snic_tgt *tgt = NULL;
+ struct scsi_cmnd *sc = NULL;
+ spinlock_t *io_lock = NULL;
+ u32 sv_state = 0, tmf = 0;
+ DECLARE_COMPLETION_ONSTACK(tm_done);
+ unsigned long flags;
+ int ret = 0;
+
+ io_lock = snic_io_lock_tag(snic, tag);
+ spin_lock_irqsave(io_lock, flags);
+ sc = scsi_host_find_tag(snic->shost, tag);
+
+ /* Ignore Cmd that don't belong to Lun Reset device */
+ if (!sc || sc->device != lr_sdev)
+ goto skip_clean;
+
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+
+ if (!rqi)
+ goto skip_clean;
+
+
+ if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
+ goto skip_clean;
+
+
+ if ((CMD_FLAGS(sc) & SNIC_DEVICE_RESET) &&
+ (!(CMD_FLAGS(sc) & SNIC_DEV_RST_ISSUED))) {
+
+ SNIC_SCSI_DBG(snic->shost,
+ "clean_single_req: devrst is not pending sc 0x%p\n",
+ sc);
+
+ goto skip_clean;
+ }
+
+ SNIC_SCSI_DBG(snic->shost,
+ "clean_single_req: Found IO in %s on lun\n",
+ snic_ioreq_state_to_str(CMD_STATE(sc)));
+
+ /* Save Command State */
+ sv_state = CMD_STATE(sc);
+
+ /*
+ * Any pending IO issued prior to reset is expected to be
+ * in abts pending state, if not we need to set SNIC_IOREQ_ABTS_PENDING
+ * to indicate the IO is abort pending.
+ * When IO is completed, the IO will be handed over and handled
+ * in this function.
+ */
+
+ CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING;
+ SNIC_BUG_ON(rqi->abts_done);
+
+ if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) {
+ rqi->tm_tag = SNIC_TAG_DEV_RST;
+
+ SNIC_SCSI_DBG(snic->shost,
+ "clean_single_req:devrst sc 0x%p\n", sc);
+ }
+
+ CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE;
+ rqi->abts_done = &tm_done;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ tgt = starget_to_tgt(scsi_target(sc->device));
+ if ((snic_tgt_chkready(tgt) != 0) && (tgt->tdata.typ == SNIC_TGT_SAN))
+ tmf = SNIC_ITMF_ABTS_TASK_TERM;
+ else
+ tmf = SNIC_ITMF_ABTS_TASK;
+
+ /* Now queue the abort command to firmware */
+ ret = snic_queue_abort_req(snic, rqi, sc, tmf);
+ if (ret) {
+ SNIC_HOST_ERR(snic->shost,
+ "clean_single_req_err:sc %p, tag %d abt failed. tm_tag %d flags 0x%llx\n",
+ sc, tag, rqi->tm_tag, CMD_FLAGS(sc));
+
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (rqi)
+ rqi->abts_done = NULL;
+
+ /* Restore Command State */
+ if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
+ CMD_STATE(sc) = sv_state;
+
+ ret = 1;
+ goto skip_clean;
+ }
+
+ spin_lock_irqsave(io_lock, flags);
+ if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET)
+ CMD_FLAGS(sc) |= SNIC_DEV_RST_TERM_ISSUED;
+
+ CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_ISSUED;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ wait_for_completion_timeout(&tm_done, SNIC_ABTS_TIMEOUT);
+
+ /* Recheck cmd state to check if it now aborted. */
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (!rqi) {
+ CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
+ goto skip_clean;
+ }
+ rqi->abts_done = NULL;
+
+ /* if abort is still pending w/ fw, fail */
+ if (CMD_ABTS_STATUS(sc) == SNIC_INVALID_CODE) {
+ SNIC_HOST_ERR(snic->shost,
+ "clean_single_req_err:sc %p tag %d abt still pending w/ fw, tm_tag %d flags 0x%llx\n",
+ sc, tag, rqi->tm_tag, CMD_FLAGS(sc));
+
+ CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_DONE;
+ ret = 1;
+
+ goto skip_clean;
+ }
+
+ CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE;
+ CMD_SP(sc) = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ snic_release_req_buf(snic, rqi, sc);
+
+ ret = 0;
+
+ return ret;
+
+skip_clean:
+ spin_unlock_irqrestore(io_lock, flags);
+
+ return ret;
+} /* end of snic_dr_clean_single_req */
+
+static int
+snic_dr_clean_pending_req(struct snic *snic, struct scsi_cmnd *lr_sc)
+{
+ struct scsi_device *lr_sdev = lr_sc->device;
+ u32 tag = 0;
+ int ret = FAILED;
+
+ for (tag = 0; tag < snic->max_tag_id; tag++) {
+ if (tag == snic_cmd_tag(lr_sc))
+ continue;
+
+ ret = snic_dr_clean_single_req(snic, tag, lr_sdev);
+ if (ret) {
+ SNIC_HOST_ERR(snic->shost, "clean_err:tag = %d\n", tag);
+
+ goto clean_err;
+ }
+ }
+
+ schedule_timeout(msecs_to_jiffies(100));
+
+ /* Walk through all the cmds and check abts status. */
+ if (snic_is_abts_pending(snic, lr_sc)) {
+ ret = FAILED;
+
+ goto clean_err;
+ }
+
+ ret = 0;
+ SNIC_SCSI_DBG(snic->shost, "clean_pending_req: Success.\n");
+
+ return ret;
+
+clean_err:
+ ret = FAILED;
+ SNIC_HOST_ERR(snic->shost,
+ "Failed to Clean Pending IOs on %s device.\n",
+ dev_name(&lr_sdev->sdev_gendev));
+
+ return ret;
+
+} /* end of snic_dr_clean_pending_req */
+
+/*
+ * snic_dr_finish : Called by snic_device_reset
+ */
+static int
+snic_dr_finish(struct snic *snic, struct scsi_cmnd *sc)
+{
+ struct snic_req_info *rqi = NULL;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags;
+ int lr_res = 0;
+ int ret = FAILED;
+
+ io_lock = snic_io_lock_hash(snic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (!rqi) {
+ spin_unlock_irqrestore(io_lock, flags);
+ SNIC_SCSI_DBG(snic->shost,
+ "dr_fini: rqi is null tag 0x%x sc 0x%p flags 0x%llx\n",
+ snic_cmd_tag(sc), sc, CMD_FLAGS(sc));
+
+ ret = FAILED;
+ goto dr_fini_end;
+ }
+
+ rqi->dr_done = NULL;
+
+ lr_res = CMD_LR_STATUS(sc);
+
+ switch (lr_res) {
+ case SNIC_INVALID_CODE:
+ /* stats */
+ SNIC_SCSI_DBG(snic->shost,
+ "dr_fini: Tag %x Dev Reset Timedout. flags 0x%llx\n",
+ snic_cmd_tag(sc), CMD_FLAGS(sc));
+
+ CMD_FLAGS(sc) |= SNIC_DEV_RST_TIMEDOUT;
+ ret = FAILED;
+
+ goto dr_failed;
+
+ case SNIC_STAT_IO_SUCCESS:
+ SNIC_SCSI_DBG(snic->shost,
+ "dr_fini: Tag %x Dev Reset cmpl\n",
+ snic_cmd_tag(sc));
+ ret = 0;
+ break;
+
+ default:
+ SNIC_HOST_ERR(snic->shost,
+ "dr_fini:Device Reset completed& failed.Tag = %x lr_status %s flags 0x%llx\n",
+ snic_cmd_tag(sc),
+ snic_io_status_to_str(lr_res), CMD_FLAGS(sc));
+ ret = FAILED;
+ goto dr_failed;
+ }
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /*
+ * Cleanup any IOs on this LUN that have still not completed.
+ * If any of these fail, then LUN Reset fails.
+ * Cleanup cleans all commands on this LUN except
+ * the lun reset command. If all cmds get cleaned, the LUN Reset
+ * succeeds.
+ */
+
+ ret = snic_dr_clean_pending_req(snic, sc);
+ if (ret) {
+ spin_lock_irqsave(io_lock, flags);
+ SNIC_SCSI_DBG(snic->shost,
+ "dr_fini: Device Reset Failed since could not abort all IOs. Tag = %x.\n",
+ snic_cmd_tag(sc));
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+
+ goto dr_failed;
+ } else {
+ /* Cleanup LUN Reset Command */
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (rqi)
+ ret = SUCCESS; /* Completed Successfully */
+ else
+ ret = FAILED;
+ }
+
+dr_failed:
+ SNIC_BUG_ON(!spin_is_locked(io_lock));
+ if (rqi)
+ CMD_SP(sc) = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ if (rqi)
+ snic_release_req_buf(snic, rqi, sc);
+
+dr_fini_end:
+ return ret;
+} /* end of snic_dr_finish */
+
+static int
+snic_queue_dr_req(struct snic *snic,
+ struct snic_req_info *rqi,
+ struct scsi_cmnd *sc)
+{
+ /* Add special tag for device reset */
+ rqi->tm_tag |= SNIC_TAG_DEV_RST;
+
+ return snic_issue_tm_req(snic, rqi, sc, SNIC_ITMF_LUN_RESET);
+}
+
+static int
+snic_send_dr_and_wait(struct snic *snic, struct scsi_cmnd *sc)
+{
+ struct snic_req_info *rqi = NULL;
+ enum snic_ioreq_state sv_state;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags;
+ DECLARE_COMPLETION_ONSTACK(tm_done);
+ int ret = FAILED, tag = snic_cmd_tag(sc);
+
+ io_lock = snic_io_lock_hash(snic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ CMD_FLAGS(sc) |= SNIC_DEVICE_RESET;
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (!rqi) {
+ SNIC_HOST_ERR(snic->shost,
+ "send_dr: rqi is null, Tag 0x%x flags 0x%llx\n",
+ tag, CMD_FLAGS(sc));
+ spin_unlock_irqrestore(io_lock, flags);
+
+ ret = FAILED;
+ goto send_dr_end;
+ }
+
+ /* Save Command state to restore in case Queuing failed. */
+ sv_state = CMD_STATE(sc);
+
+ CMD_STATE(sc) = SNIC_IOREQ_LR_PENDING;
+ CMD_LR_STATUS(sc) = SNIC_INVALID_CODE;
+
+ SNIC_SCSI_DBG(snic->shost, "dr: TAG = %x\n", tag);
+
+ rqi->dr_done = &tm_done;
+ SNIC_BUG_ON(!rqi->dr_done);
+
+ spin_unlock_irqrestore(io_lock, flags);
+ /*
+ * The Command state is changed to IOREQ_PENDING,
+ * in this case, if the command is completed, the icmnd_cmpl will
+ * mark the cmd as completed.
+ * This logic still makes LUN Reset is inevitable.
+ */
+
+ ret = snic_queue_dr_req(snic, rqi, sc);
+ if (ret) {
+ SNIC_HOST_ERR(snic->shost,
+ "send_dr: IO w/ Tag 0x%x Failed err = %d. flags 0x%llx\n",
+ tag, ret, CMD_FLAGS(sc));
+
+ spin_lock_irqsave(io_lock, flags);
+ /* Restore State */
+ CMD_STATE(sc) = sv_state;
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (rqi)
+ rqi->dr_done = NULL;
+ /* rqi is freed in caller. */
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = FAILED;
+
+ goto send_dr_end;
+ }
+
+ spin_lock_irqsave(io_lock, flags);
+ CMD_FLAGS(sc) |= SNIC_DEV_RST_ISSUED;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ ret = 0;
+
+ wait_for_completion_timeout(&tm_done, SNIC_LUN_RESET_TIMEOUT);
+
+send_dr_end:
+ return ret;
+}
+
+/*
+ * auxillary funciton to check lun reset op is supported or not
+ * Not supported if returns 0
+ */
+static int
+snic_dev_reset_supported(struct scsi_device *sdev)
+{
+ struct snic_tgt *tgt = starget_to_tgt(scsi_target(sdev));
+
+ if (tgt->tdata.typ == SNIC_TGT_DAS)
+ return 0;
+
+ return 1;
+}
+
+static void
+snic_unlink_and_release_req(struct snic *snic, struct scsi_cmnd *sc, int flag)
+{
+ struct snic_req_info *rqi = NULL;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags;
+ u32 start_time = jiffies;
+
+ io_lock = snic_io_lock_hash(snic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (rqi) {
+ start_time = rqi->start_time;
+ CMD_SP(sc) = NULL;
+ }
+
+ CMD_FLAGS(sc) |= flag;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ if (rqi)
+ snic_release_req_buf(snic, rqi, sc);
+
+ SNIC_TRC(snic->shost->host_no, snic_cmd_tag(sc), (ulong) sc,
+ jiffies_to_msecs(jiffies - start_time), (ulong) rqi,
+ SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
+}
+
+/*
+ * SCSI Eh thread issues a LUN Reset when one or more commands on a LUN
+ * fail to get aborted. It calls driver's eh_device_reset with a SCSI
+ * command on the LUN.
+ */
+int
+snic_device_reset(struct scsi_cmnd *sc)
+{
+ struct Scsi_Host *shost = sc->device->host;
+ struct snic *snic = shost_priv(shost);
+ struct snic_req_info *rqi = NULL;
+ int tag = snic_cmd_tag(sc);
+ int start_time = jiffies;
+ int ret = FAILED;
+ int dr_supp = 0;
+
+ SNIC_SCSI_DBG(shost, "dev_reset:sc %p :0x%x :req = %p :tag = %d\n",
+ sc, sc->cmnd[0], sc->request,
+ snic_cmd_tag(sc));
+ dr_supp = snic_dev_reset_supported(sc->device);
+ if (!dr_supp) {
+ /* device reset op is not supported */
+ SNIC_HOST_INFO(shost, "LUN Reset Op not supported.\n");
+ snic_unlink_and_release_req(snic, sc, SNIC_DEV_RST_NOTSUP);
+
+ goto dev_rst_end;
+ }
+
+ if (unlikely(snic_get_state(snic) != SNIC_ONLINE)) {
+ snic_unlink_and_release_req(snic, sc, 0);
+ SNIC_HOST_ERR(shost, "Devrst: Parent Devs are not online.\n");
+
+ goto dev_rst_end;
+ }
+
+ /* There is no tag when lun reset is issue through ioctl. */
+ if (unlikely(tag <= SNIC_NO_TAG)) {
+ SNIC_HOST_INFO(snic->shost,
+ "Devrst: LUN Reset Recvd thru IOCTL.\n");
+
+ rqi = snic_req_init(snic, 0);
+ if (!rqi)
+ goto dev_rst_end;
+
+ memset(scsi_cmd_priv(sc), 0,
+ sizeof(struct snic_internal_io_state));
+ CMD_SP(sc) = (char *)rqi;
+ CMD_FLAGS(sc) = SNIC_NO_FLAGS;
+
+ /* Add special tag for dr coming from user spc */
+ rqi->tm_tag = SNIC_TAG_IOCTL_DEV_RST;
+ rqi->sc = sc;
+ }
+
+ ret = snic_send_dr_and_wait(snic, sc);
+ if (ret) {
+ SNIC_HOST_ERR(snic->shost,
+ "Devrst: IO w/ Tag %x Failed w/ err = %d\n",
+ tag, ret);
+
+ snic_unlink_and_release_req(snic, sc, 0);
+
+ goto dev_rst_end;
+ }
+
+ ret = snic_dr_finish(snic, sc);
+
+dev_rst_end:
+ SNIC_TRC(snic->shost->host_no, tag, (ulong) sc,
+ jiffies_to_msecs(jiffies - start_time),
+ 0, SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
+
+ SNIC_SCSI_DBG(snic->shost,
+ "Devrst: Returning from Device Reset : %s\n",
+ (ret == SUCCESS) ? "SUCCESS" : "FAILED");
+
+ return ret;
+} /* end of snic_device_reset */
+
+/*
+ * SCSI Error handling calls driver's eh_host_reset if all prior
+ * error handling levels return FAILED.
+ *
+ * Host Reset is the highest level of error recovery. If this fails, then
+ * host is offlined by SCSI.
+ */
+/*
+ * snic_issue_hba_reset : Queues FW Reset Request.
+ */
+static int
+snic_issue_hba_reset(struct snic *snic, struct scsi_cmnd *sc)
+{
+ struct snic_req_info *rqi = NULL;
+ struct snic_host_req *req = NULL;
+ spinlock_t *io_lock = NULL;
+ DECLARE_COMPLETION_ONSTACK(wait);
+ unsigned long flags;
+ int ret = -ENOMEM;
+
+ rqi = snic_req_init(snic, 0);
+ if (!rqi) {
+ ret = -ENOMEM;
+
+ goto hba_rst_end;
+ }
+
+ if (snic_cmd_tag(sc) == SCSI_NO_TAG) {
+ memset(scsi_cmd_priv(sc), 0,
+ sizeof(struct snic_internal_io_state));
+ SNIC_HOST_INFO(snic->shost, "issu_hr:Host reset thru ioctl.\n");
+ rqi->sc = sc;
+ }
+
+ req = rqi_to_req(rqi);
+
+ io_lock = snic_io_lock_hash(snic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ SNIC_BUG_ON(CMD_SP(sc) != NULL);
+ CMD_STATE(sc) = SNIC_IOREQ_PENDING;
+ CMD_SP(sc) = (char *) rqi;
+ CMD_FLAGS(sc) |= SNIC_IO_INITIALIZED;
+ snic->remove_wait = &wait;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* Initialize Request */
+ snic_io_hdr_enc(&req->hdr, SNIC_REQ_HBA_RESET, 0, snic_cmd_tag(sc),
+ snic->config.hid, 0, (ulong) rqi);
+
+ req->u.reset.flags = 0;
+
+ ret = snic_queue_wq_desc(snic, req, sizeof(*req));
+ if (ret) {
+ SNIC_HOST_ERR(snic->shost,
+ "issu_hr:Queuing HBA Reset Failed. w err %d\n",
+ ret);
+
+ goto hba_rst_err;
+ }
+
+ spin_lock_irqsave(io_lock, flags);
+ CMD_FLAGS(sc) |= SNIC_HOST_RESET_ISSUED;
+ spin_unlock_irqrestore(io_lock, flags);
+ atomic64_inc(&snic->s_stats.reset.hba_resets);
+ SNIC_HOST_INFO(snic->shost, "Queued HBA Reset Successfully.\n");
+
+ wait_for_completion_timeout(snic->remove_wait,
+ SNIC_HOST_RESET_TIMEOUT);
+
+ if (snic_get_state(snic) == SNIC_FWRESET) {
+ SNIC_HOST_ERR(snic->shost, "reset_cmpl: Reset Timedout.\n");
+ ret = -ETIMEDOUT;
+
+ goto hba_rst_err;
+ }
+
+ spin_lock_irqsave(io_lock, flags);
+ snic->remove_wait = NULL;
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ CMD_SP(sc) = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ if (rqi)
+ snic_req_free(snic, rqi);
+
+ ret = 0;
+
+ return ret;
+
+hba_rst_err:
+ spin_lock_irqsave(io_lock, flags);
+ snic->remove_wait = NULL;
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ CMD_SP(sc) = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ if (rqi)
+ snic_req_free(snic, rqi);
+
+hba_rst_end:
+ SNIC_HOST_ERR(snic->shost,
+ "reset:HBA Reset Failed w/ err = %d.\n",
+ ret);
+
+ return ret;
+} /* end of snic_issue_hba_reset */
+
+int
+snic_reset(struct Scsi_Host *shost, struct scsi_cmnd *sc)
+{
+ struct snic *snic = shost_priv(shost);
+ enum snic_state sv_state;
+ unsigned long flags;
+ int ret = FAILED;
+
+ /* Set snic state as SNIC_FWRESET*/
+ sv_state = snic_get_state(snic);
+
+ spin_lock_irqsave(&snic->snic_lock, flags);
+ if (snic_get_state(snic) == SNIC_FWRESET) {
+ spin_unlock_irqrestore(&snic->snic_lock, flags);
+ SNIC_HOST_INFO(shost, "reset:prev reset is in progres\n");
+
+ msleep(SNIC_HOST_RESET_TIMEOUT);
+ ret = SUCCESS;
+
+ goto reset_end;
+ }
+
+ snic_set_state(snic, SNIC_FWRESET);
+ spin_unlock_irqrestore(&snic->snic_lock, flags);
+
+
+ /* Wait for all the IOs that are entered in Qcmd */
+ while (atomic_read(&snic->ios_inflight))
+ schedule_timeout(msecs_to_jiffies(1));
+
+ ret = snic_issue_hba_reset(snic, sc);
+ if (ret) {
+ SNIC_HOST_ERR(shost,
+ "reset:Host Reset Failed w/ err %d.\n",
+ ret);
+ spin_lock_irqsave(&snic->snic_lock, flags);
+ snic_set_state(snic, sv_state);
+ spin_unlock_irqrestore(&snic->snic_lock, flags);
+ atomic64_inc(&snic->s_stats.reset.hba_reset_fail);
+ ret = FAILED;
+
+ goto reset_end;
+ }
+
+ ret = SUCCESS;
+
+reset_end:
+ return ret;
+} /* end of snic_reset */
+
+/*
+ * SCSI Error handling calls driver's eh_host_reset if all prior
+ * error handling levels return FAILED.
+ *
+ * Host Reset is the highest level of error recovery. If this fails, then
+ * host is offlined by SCSI.
+ */
+int
+snic_host_reset(struct scsi_cmnd *sc)
+{
+ struct Scsi_Host *shost = sc->device->host;
+ u32 start_time = jiffies;
+ int ret = FAILED;
+
+ SNIC_SCSI_DBG(shost,
+ "host reset:sc %p sc_cmd 0x%x req %p tag %d flags 0x%llx\n",
+ sc, sc->cmnd[0], sc->request,
+ snic_cmd_tag(sc), CMD_FLAGS(sc));
+
+ ret = snic_reset(shost, sc);
+
+ SNIC_TRC(shost->host_no, snic_cmd_tag(sc), (ulong) sc,
+ jiffies_to_msecs(jiffies - start_time),
+ 0, SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
+
+ return ret;
+} /* end of snic_host_reset */
+
+/*
+ * snic_cmpl_pending_tmreq : Caller should hold io_lock
+ */
+static void
+snic_cmpl_pending_tmreq(struct snic *snic, struct scsi_cmnd *sc)
+{
+ struct snic_req_info *rqi = NULL;
+
+ SNIC_SCSI_DBG(snic->shost,
+ "Completing Pending TM Req sc %p, state %s flags 0x%llx\n",
+ sc, snic_io_status_to_str(CMD_STATE(sc)), CMD_FLAGS(sc));
+
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (!rqi)
+ return;
+
+ if (rqi->dr_done)
+ complete(rqi->dr_done);
+ else if (rqi->abts_done)
+ complete(rqi->abts_done);
+}
+
+/*
+ * snic_scsi_cleanup: Walks through tag map and releases the reqs
+ */
+static void
+snic_scsi_cleanup(struct snic *snic, int ex_tag)
+{
+ struct snic_req_info *rqi = NULL;
+ struct scsi_cmnd *sc = NULL;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags;
+ int tag;
+ u64 st_time = 0;
+
+ SNIC_SCSI_DBG(snic->shost, "sc_clean: scsi cleanup.\n");
+
+ for (tag = 0; tag < snic->max_tag_id; tag++) {
+ /* Skip ex_tag */
+ if (tag == ex_tag)
+ continue;
+
+ io_lock = snic_io_lock_tag(snic, tag);
+ spin_lock_irqsave(io_lock, flags);
+ sc = scsi_host_find_tag(snic->shost, tag);
+ if (!sc) {
+ spin_unlock_irqrestore(io_lock, flags);
+
+ continue;
+ }
+
+ if (unlikely(snic_tmreq_pending(sc))) {
+ /*
+ * When FW Completes reset w/o sending completions
+ * for outstanding ios.
+ */
+ snic_cmpl_pending_tmreq(snic, sc);
+ spin_unlock_irqrestore(io_lock, flags);
+
+ continue;
+ }
+
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (!rqi) {
+ spin_unlock_irqrestore(io_lock, flags);
+
+ goto cleanup;
+ }
+
+ SNIC_SCSI_DBG(snic->shost,
+ "sc_clean: sc %p, rqi %p, tag %d flags 0x%llx\n",
+ sc, rqi, tag, CMD_FLAGS(sc));
+
+ CMD_SP(sc) = NULL;
+ CMD_FLAGS(sc) |= SNIC_SCSI_CLEANUP;
+ spin_unlock_irqrestore(io_lock, flags);
+ st_time = rqi->start_time;
+
+ SNIC_HOST_INFO(snic->shost,
+ "sc_clean: Releasing rqi %p : flags 0x%llx\n",
+ rqi, CMD_FLAGS(sc));
+
+ snic_release_req_buf(snic, rqi, sc);
+
+cleanup:
+ sc->result = DID_TRANSPORT_DISRUPTED << 16;
+ SNIC_HOST_INFO(snic->shost,
+ "sc_clean: DID_TRANSPORT_DISRUPTED for sc %p. rqi %p duration %llu msecs\n",
+ sc, rqi, (jiffies - st_time));
+
+ /* Update IO stats */
+ snic_stats_update_io_cmpl(&snic->s_stats);
+
+ if (sc->scsi_done) {
+ SNIC_TRC(snic->shost->host_no, tag, (ulong) sc,
+ jiffies_to_msecs(jiffies - st_time), 0,
+ SNIC_TRC_CMD(sc),
+ SNIC_TRC_CMD_STATE_FLAGS(sc));
+
+ sc->scsi_done(sc);
+ }
+ }
+} /* end of snic_scsi_cleanup */
+
+void
+snic_shutdown_scsi_cleanup(struct snic *snic)
+{
+ SNIC_HOST_INFO(snic->shost, "Shutdown time SCSI Cleanup.\n");
+
+ snic_scsi_cleanup(snic, SCSI_NO_TAG);
+} /* end of snic_shutdown_scsi_cleanup */
+
+/*
+ * snic_internal_abort_io
+ * called by : snic_tgt_scsi_abort_io
+ */
+static int
+snic_internal_abort_io(struct snic *snic, struct scsi_cmnd *sc, int tmf)
+{
+ struct snic_req_info *rqi = NULL;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags;
+ u32 sv_state = 0;
+ int ret = 0;
+
+ io_lock = snic_io_lock_hash(snic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ rqi = (struct snic_req_info *) CMD_SP(sc);
+ if (!rqi)
+ goto skip_internal_abts;
+
+ if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
+ goto skip_internal_abts;
+
+ if ((CMD_FLAGS(sc) & SNIC_DEVICE_RESET) &&
+ (!(CMD_FLAGS(sc) & SNIC_DEV_RST_ISSUED))) {
+
+ SNIC_SCSI_DBG(snic->shost,
+ "internal_abts: dev rst not pending sc 0x%p\n",
+ sc);
+
+ goto skip_internal_abts;
+ }
+
+
+ if (!(CMD_FLAGS(sc) & SNIC_IO_ISSUED)) {
+ SNIC_SCSI_DBG(snic->shost,
+ "internal_abts: IO not yet issued sc 0x%p tag 0x%x flags 0x%llx state %d\n",
+ sc, snic_cmd_tag(sc), CMD_FLAGS(sc), CMD_STATE(sc));
+
+ goto skip_internal_abts;
+ }
+
+ sv_state = CMD_STATE(sc);
+ CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING;
+ CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE;
+ CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_PENDING;
+
+ if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) {
+ /* stats */
+ rqi->tm_tag = SNIC_TAG_DEV_RST;
+ SNIC_SCSI_DBG(snic->shost, "internal_abts:dev rst sc %p\n", sc);
+ }
+
+ SNIC_SCSI_DBG(snic->shost, "internal_abts: Issuing abts tag %x\n",
+ snic_cmd_tag(sc));
+ SNIC_BUG_ON(rqi->abts_done);
+ spin_unlock_irqrestore(io_lock, flags);
+
+ ret = snic_queue_abort_req(snic, rqi, sc, tmf);
+ if (ret) {
+ SNIC_HOST_ERR(snic->shost,
+ "internal_abts: Tag = %x , Failed w/ err = %d\n",
+ snic_cmd_tag(sc), ret);
+
+ spin_lock_irqsave(io_lock, flags);
+
+ if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
+ CMD_STATE(sc) = sv_state;
+
+ goto skip_internal_abts;
+ }
+
+ spin_lock_irqsave(io_lock, flags);
+ if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET)
+ CMD_FLAGS(sc) |= SNIC_DEV_RST_TERM_ISSUED;
+ else
+ CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_ISSUED;
+
+ ret = SUCCESS;
+
+skip_internal_abts:
+ SNIC_BUG_ON(!spin_is_locked(io_lock));
+ spin_unlock_irqrestore(io_lock, flags);
+
+ return ret;
+} /* end of snic_internal_abort_io */
+
+/*
+ * snic_tgt_scsi_abort_io : called by snic_tgt_del
+ */
+int
+snic_tgt_scsi_abort_io(struct snic_tgt *tgt)
+{
+ struct snic *snic = NULL;
+ struct scsi_cmnd *sc = NULL;
+ struct snic_tgt *sc_tgt = NULL;
+ spinlock_t *io_lock = NULL;
+ unsigned long flags;
+ int ret = 0, tag, abt_cnt = 0, tmf = 0;
+
+ if (!tgt)
+ return -1;
+
+ snic = shost_priv(snic_tgt_to_shost(tgt));
+ SNIC_SCSI_DBG(snic->shost, "tgt_abt_io: Cleaning Pending IOs.\n");
+
+ if (tgt->tdata.typ == SNIC_TGT_DAS)
+ tmf = SNIC_ITMF_ABTS_TASK;
+ else
+ tmf = SNIC_ITMF_ABTS_TASK_TERM;
+
+ for (tag = 0; tag < snic->max_tag_id; tag++) {
+ io_lock = snic_io_lock_tag(snic, tag);
+
+ spin_lock_irqsave(io_lock, flags);
+ sc = scsi_host_find_tag(snic->shost, tag);
+ if (!sc) {
+ spin_unlock_irqrestore(io_lock, flags);
+
+ continue;
+ }
+
+ sc_tgt = starget_to_tgt(scsi_target(sc->device));
+ if (sc_tgt != tgt) {
+ spin_unlock_irqrestore(io_lock, flags);
+
+ continue;
+ }
+ spin_unlock_irqrestore(io_lock, flags);
+
+ ret = snic_internal_abort_io(snic, sc, tmf);
+ if (ret < 0) {
+ SNIC_HOST_ERR(snic->shost,
+ "tgt_abt_io: Tag %x, Failed w err = %d\n",
+ tag, ret);
+
+ continue;
+ }
+
+ if (ret == SUCCESS)
+ abt_cnt++;
+ }
+
+ SNIC_SCSI_DBG(snic->shost, "tgt_abt_io: abt_cnt = %d\n", abt_cnt);
+
+ return 0;
+} /* end of snic_tgt_scsi_abort_io */