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-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.c90
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.h10
2 files changed, 37 insertions, 63 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 1e1e347..29429a1 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -542,6 +542,7 @@ static void srp_unmap_data(struct scsi_cmnd *scmnd,
static void srp_remove_req(struct srp_target_port *target, struct srp_request *req)
{
srp_unmap_data(req->scmnd, target, req);
+ req->scmnd = NULL;
list_move_tail(&req->list, &target->free_reqs);
}
@@ -925,15 +926,13 @@ static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp)
target->req_lim += delta;
- req = &target->req_ring[rsp->tag & ~SRP_TAG_TSK_MGMT];
-
if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) {
- if (be32_to_cpu(rsp->resp_data_len) < 4)
- req->tsk_status = -1;
- else
- req->tsk_status = rsp->data[3];
- complete(&req->done);
+ target->tsk_mgmt_status = -1;
+ if (be32_to_cpu(rsp->resp_data_len) >= 4)
+ target->tsk_mgmt_status = rsp->data[3];
+ complete(&target->tsk_mgmt_done);
} else {
+ req = &target->req_ring[rsp->tag];
scmnd = req->scmnd;
if (!scmnd)
shost_printk(KERN_ERR, target->scsi_host,
@@ -953,13 +952,9 @@ static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp)
else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER))
scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt));
- if (!req->tsk_mgmt) {
- scmnd->host_scribble = (void *) -1L;
- scmnd->scsi_done(scmnd);
-
- srp_remove_req(target, req);
- } else
- req->cmd_done = 1;
+ scmnd->host_scribble = NULL;
+ scmnd->scsi_done(scmnd);
+ srp_remove_req(target, req);
}
spin_unlock_irqrestore(target->scsi_host->host_lock, flags);
@@ -1155,7 +1150,7 @@ static int srp_queuecommand_lck(struct scsi_cmnd *scmnd,
scmnd->scsi_done = done;
scmnd->result = 0;
- scmnd->host_scribble = (void *) (long) req->index;
+ scmnd->host_scribble = (void *) req;
cmd = iu->buf;
memset(cmd, 0, sizeof *cmd);
@@ -1167,8 +1162,6 @@ static int srp_queuecommand_lck(struct scsi_cmnd *scmnd,
req->scmnd = scmnd;
req->cmd = iu;
- req->cmd_done = 0;
- req->tsk_mgmt = NULL;
len = srp_map_data(scmnd, target, req);
if (len < 0) {
@@ -1442,7 +1435,7 @@ static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event)
}
static int srp_send_tsk_mgmt(struct srp_target_port *target,
- struct srp_request *req, u8 func)
+ u64 req_tag, unsigned int lun, u8 func)
{
struct ib_device *dev = target->srp_host->srp_dev->dev;
struct srp_iu *iu;
@@ -1451,12 +1444,10 @@ static int srp_send_tsk_mgmt(struct srp_target_port *target,
spin_lock_irq(target->scsi_host->host_lock);
if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED) {
- req->scmnd->result = DID_BAD_TARGET << 16;
+ target->state == SRP_TARGET_REMOVED)
goto out;
- }
- init_completion(&req->done);
+ init_completion(&target->tsk_mgmt_done);
iu = __srp_get_tx_iu(target, SRP_IU_TSK_MGMT);
if (!iu)
@@ -1468,21 +1459,19 @@ static int srp_send_tsk_mgmt(struct srp_target_port *target,
memset(tsk_mgmt, 0, sizeof *tsk_mgmt);
tsk_mgmt->opcode = SRP_TSK_MGMT;
- tsk_mgmt->lun = cpu_to_be64((u64) req->scmnd->device->lun << 48);
- tsk_mgmt->tag = req->index | SRP_TAG_TSK_MGMT;
+ tsk_mgmt->lun = cpu_to_be64((u64) lun << 48);
+ tsk_mgmt->tag = req_tag | SRP_TAG_TSK_MGMT;
tsk_mgmt->tsk_mgmt_func = func;
- tsk_mgmt->task_tag = req->index;
+ tsk_mgmt->task_tag = req_tag;
ib_dma_sync_single_for_device(dev, iu->dma, sizeof *tsk_mgmt,
DMA_TO_DEVICE);
if (__srp_post_send(target, iu, sizeof *tsk_mgmt))
goto out;
- req->tsk_mgmt = iu;
-
spin_unlock_irq(target->scsi_host->host_lock);
- if (!wait_for_completion_timeout(&req->done,
+ if (!wait_for_completion_timeout(&target->tsk_mgmt_done,
msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS)))
return -1;
@@ -1493,43 +1482,29 @@ out:
return -1;
}
-static int srp_find_req(struct srp_target_port *target,
- struct scsi_cmnd *scmnd,
- struct srp_request **req)
-{
- if (scmnd->host_scribble == (void *) -1L)
- return -1;
-
- *req = &target->req_ring[(long) scmnd->host_scribble];
-
- return 0;
-}
-
static int srp_abort(struct scsi_cmnd *scmnd)
{
struct srp_target_port *target = host_to_target(scmnd->device->host);
- struct srp_request *req;
+ struct srp_request *req = (struct srp_request *) scmnd->host_scribble;
int ret = SUCCESS;
shost_printk(KERN_ERR, target->scsi_host, "SRP abort called\n");
- if (target->qp_in_error)
- return FAILED;
- if (srp_find_req(target, scmnd, &req))
+ if (!req || target->qp_in_error)
return FAILED;
- if (srp_send_tsk_mgmt(target, req, SRP_TSK_ABORT_TASK))
+ if (srp_send_tsk_mgmt(target, req->index, scmnd->device->lun,
+ SRP_TSK_ABORT_TASK))
return FAILED;
spin_lock_irq(target->scsi_host->host_lock);
- if (req->cmd_done) {
- srp_remove_req(target, req);
- scmnd->scsi_done(scmnd);
- } else if (!req->tsk_status) {
- srp_remove_req(target, req);
- scmnd->result = DID_ABORT << 16;
- } else
- ret = FAILED;
+ if (req->scmnd) {
+ if (!target->tsk_mgmt_status) {
+ srp_remove_req(target, req);
+ scmnd->result = DID_ABORT << 16;
+ } else
+ ret = FAILED;
+ }
spin_unlock_irq(target->scsi_host->host_lock);
@@ -1545,17 +1520,16 @@ static int srp_reset_device(struct scsi_cmnd *scmnd)
if (target->qp_in_error)
return FAILED;
- if (srp_find_req(target, scmnd, &req))
- return FAILED;
- if (srp_send_tsk_mgmt(target, req, SRP_TSK_LUN_RESET))
+ if (srp_send_tsk_mgmt(target, SRP_TAG_NO_REQ, scmnd->device->lun,
+ SRP_TSK_LUN_RESET))
return FAILED;
- if (req->tsk_status)
+ if (target->tsk_mgmt_status)
return FAILED;
spin_lock_irq(target->scsi_host->host_lock);
list_for_each_entry_safe(req, tmp, &target->req_queue, list)
- if (req->scmnd->device == scmnd->device)
+ if (req->scmnd && req->scmnd->device == scmnd->device)
srp_reset_req(target, req);
spin_unlock_irq(target->scsi_host->host_lock);
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h
index ed0dce9..f8b689a 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.h
+++ b/drivers/infiniband/ulp/srp/ib_srp.h
@@ -68,7 +68,8 @@ enum {
SRP_TSK_MGMT_SQ_SIZE = 1,
SRP_CMD_SQ_SIZE = SRP_REQ_SQ_SIZE - SRP_TSK_MGMT_SQ_SIZE,
- SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1),
+ SRP_TAG_NO_REQ = ~0U,
+ SRP_TAG_TSK_MGMT = 1U << 31,
SRP_FMR_SIZE = 256,
SRP_FMR_POOL_SIZE = 1024,
@@ -113,12 +114,8 @@ struct srp_request {
struct list_head list;
struct scsi_cmnd *scmnd;
struct srp_iu *cmd;
- struct srp_iu *tsk_mgmt;
struct ib_pool_fmr *fmr;
- struct completion done;
short index;
- u8 cmd_done;
- u8 tsk_status;
};
struct srp_target_port {
@@ -165,6 +162,9 @@ struct srp_target_port {
int status;
enum srp_target_state state;
int qp_in_error;
+
+ struct completion tsk_mgmt_done;
+ u8 tsk_mgmt_status;
};
struct srp_iu {
generated by cgit v1.1 at 2024-12-27 10:47:50 +0000