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-rw-r--r--drivers/scsi/fnic/fnic.h42
-rw-r--r--drivers/scsi/fnic/fnic_main.c3
-rw-r--r--drivers/scsi/fnic/fnic_scsi.c384
3 files changed, 397 insertions, 32 deletions
diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
index 95a5ba29320d..63b35c8e40bd 100644
--- a/drivers/scsi/fnic/fnic.h
+++ b/drivers/scsi/fnic/fnic.h
@@ -56,6 +56,19 @@
#define FNIC_NO_TAG -1
/*
+ * Command flags to identify the type of command and for other future
+ * use.
+ */
+#define FNIC_NO_FLAGS 0
+#define FNIC_CDB_REQ BIT(1) /* All IOs with a valid CDB */
+#define FNIC_BLOCKING_REQ BIT(2) /* All blocking Requests */
+#define FNIC_DEVICE_RESET BIT(3) /* Device reset request */
+#define FNIC_DEV_RST_PENDING BIT(4) /* Device reset pending */
+#define FNIC_DEV_RST_TIMED_OUT BIT(5) /* Device reset timed out */
+#define FNIC_DEV_RST_TERM_ISSUED BIT(6) /* Device reset terminate */
+#define FNIC_DEV_RST_DONE BIT(7) /* Device reset done */
+
+/*
* Usage of the scsi_cmnd scratchpad.
* These fields are locked by the hashed io_req_lock.
*/
@@ -64,6 +77,7 @@
#define CMD_ABTS_STATUS(Cmnd) ((Cmnd)->SCp.Message)
#define CMD_LR_STATUS(Cmnd) ((Cmnd)->SCp.have_data_in)
#define CMD_TAG(Cmnd) ((Cmnd)->SCp.sent_command)
+#define CMD_FLAGS(Cmnd) ((Cmnd)->SCp.Status)
#define FCPIO_INVALID_CODE 0x100 /* hdr_status value unused by firmware */
@@ -71,9 +85,28 @@
#define FNIC_HOST_RESET_TIMEOUT 10000 /* mSec */
#define FNIC_RMDEVICE_TIMEOUT 1000 /* mSec */
#define FNIC_HOST_RESET_SETTLE_TIME 30 /* Sec */
+#define FNIC_ABT_TERM_DELAY_TIMEOUT 500 /* mSec */
#define FNIC_MAX_FCP_TARGET 256
+/**
+ * state_flags to identify host state along along with fnic's state
+ **/
+#define __FNIC_FLAGS_FWRESET BIT(0) /* fwreset in progress */
+#define __FNIC_FLAGS_BLOCK_IO BIT(1) /* IOs are blocked */
+
+#define FNIC_FLAGS_NONE (0)
+#define FNIC_FLAGS_FWRESET (__FNIC_FLAGS_FWRESET | \
+ __FNIC_FLAGS_BLOCK_IO)
+
+#define FNIC_FLAGS_IO_BLOCKED (__FNIC_FLAGS_BLOCK_IO)
+
+#define fnic_set_state_flags(fnicp, st_flags) \
+ __fnic_set_state_flags(fnicp, st_flags, 0)
+
+#define fnic_clear_state_flags(fnicp, st_flags) \
+ __fnic_set_state_flags(fnicp, st_flags, 1)
+
extern unsigned int fnic_log_level;
#define FNIC_MAIN_LOGGING 0x01
@@ -170,6 +203,9 @@ struct fnic {
struct completion *remove_wait; /* device remove thread blocks */
+ atomic_t in_flight; /* io counter */
+ u32 _reserved; /* fill hole */
+ unsigned long state_flags; /* protected by host lock */
enum fnic_state state;
spinlock_t fnic_lock;
@@ -267,4 +303,10 @@ const char *fnic_state_to_str(unsigned int state);
void fnic_log_q_error(struct fnic *fnic);
void fnic_handle_link_event(struct fnic *fnic);
+static inline int
+fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
+{
+ return ((fnic->state_flags & st_flags) == st_flags);
+}
+void __fnic_set_state_flags(struct fnic *, unsigned long, unsigned long);
#endif /* _FNIC_H_ */
diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
index fbf3ac6e0c55..fcecbb7281aa 100644
--- a/drivers/scsi/fnic/fnic_main.c
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -624,6 +624,9 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
}
fnic->state = FNIC_IN_FC_MODE;
+ atomic_set(&fnic->in_flight, 0);
+ fnic->state_flags = FNIC_FLAGS_NONE;
+
/* Enable hardware stripping of vlan header on ingress */
fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index c40ce52ed7c6..2f46509f5b5a 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -165,6 +165,33 @@ static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
}
+/**
+ * __fnic_set_state_flags
+ * Sets/Clears bits in fnic's state_flags
+ **/
+void
+__fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
+ unsigned long clearbits)
+{
+ struct Scsi_Host *host = fnic->lport->host;
+ int sh_locked = spin_is_locked(host->host_lock);
+ unsigned long flags = 0;
+
+ if (!sh_locked)
+ spin_lock_irqsave(host->host_lock, flags);
+
+ if (clearbits)
+ fnic->state_flags &= ~st_flags;
+ else
+ fnic->state_flags |= st_flags;
+
+ if (!sh_locked)
+ spin_unlock_irqrestore(host->host_lock, flags);
+
+ return;
+}
+
+
/*
* fnic_fw_reset_handler
* Routine to send reset msg to fw
@@ -175,9 +202,16 @@ int fnic_fw_reset_handler(struct fnic *fnic)
int ret = 0;
unsigned long flags;
+ /* indicate fwreset to io path */
+ fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
+
skb_queue_purge(&fnic->frame_queue);
skb_queue_purge(&fnic->tx_queue);
+ /* wait for io cmpl */
+ while (atomic_read(&fnic->in_flight))
+ schedule_timeout(msecs_to_jiffies(1));
+
spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
@@ -193,9 +227,12 @@ int fnic_fw_reset_handler(struct fnic *fnic)
if (!ret)
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"Issued fw reset\n");
- else
+ else {
+ fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"Failed to issue fw reset\n");
+ }
+
return ret;
}
@@ -351,16 +388,19 @@ static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
*/
static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
{
- struct fc_lport *lp;
+ struct fc_lport *lp = shost_priv(sc->device->host);
struct fc_rport *rport;
struct fnic_io_req *io_req;
- struct fnic *fnic;
+ struct fnic *fnic = lport_priv(lp);
struct vnic_wq_copy *wq;
int ret;
int sg_count;
unsigned long flags;
unsigned long ptr;
+ if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
+ return SCSI_MLQUEUE_HOST_BUSY;
+
rport = starget_to_rport(scsi_target(sc->device));
ret = fc_remote_port_chkready(rport);
if (ret) {
@@ -369,20 +409,20 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_
return 0;
}
- lp = shost_priv(sc->device->host);
if (lp->state != LPORT_ST_READY || !(lp->link_up))
return SCSI_MLQUEUE_HOST_BUSY;
+ atomic_inc(&fnic->in_flight);
+
/*
* Release host lock, use driver resource specific locks from here.
* Don't re-enable interrupts in case they were disabled prior to the
* caller disabling them.
*/
spin_unlock(lp->host->host_lock);
+ CMD_FLAGS(sc) = FNIC_CDB_REQ;
/* Get a new io_req for this SCSI IO */
- fnic = lport_priv(lp);
-
io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
if (!io_req) {
ret = SCSI_MLQUEUE_HOST_BUSY;
@@ -452,6 +492,7 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_
}
}
out:
+ atomic_dec(&fnic->in_flight);
/* acquire host lock before returning to SCSI */
spin_lock(lp->host->host_lock);
return ret;
@@ -529,6 +570,8 @@ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
fnic_flush_tx(fnic);
reset_cmpl_handler_end:
+ fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
+
return ret;
}
@@ -656,8 +699,12 @@ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
fcpio_tag_id_dec(&tag, &id);
- if (id >= FNIC_MAX_IO_REQ)
+ if (id >= FNIC_MAX_IO_REQ) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Tag out of range tag %x hdr status = %s\n",
+ id, fnic_fcpio_status_to_str(hdr_status));
return;
+ }
sc = scsi_host_find_tag(fnic->lport->host, id);
WARN_ON_ONCE(!sc);
@@ -805,8 +852,12 @@ static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
fcpio_tag_id_dec(&tag, &id);
- if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ)
+ if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "Tag out of range tag %x hdr status = %s\n",
+ id, fnic_fcpio_status_to_str(hdr_status));
return;
+ }
sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
WARN_ON_ONCE(!sc);
@@ -822,7 +873,19 @@ static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
return;
}
- if (id & FNIC_TAG_ABORT) {
+ if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
+ /* Abort and terminate completion of device reset req */
+ /* REVISIT : Add asserts about various flags */
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "dev reset abts cmpl recd. id %x status %s\n",
+ id, fnic_fcpio_status_to_str(hdr_status));
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
+ CMD_ABTS_STATUS(sc) = hdr_status;
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
+ if (io_req->abts_done)
+ complete(io_req->abts_done);
+ spin_unlock_irqrestore(io_lock, flags);
+ } else if (id & FNIC_TAG_ABORT) {
/* Completion of abort cmd */
if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
/* This is a late completion. Ignore it */
@@ -862,7 +925,27 @@ static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
} else if (id & FNIC_TAG_DEV_RST) {
/* Completion of device reset */
CMD_LR_STATUS(sc) = hdr_status;
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Terminate pending "
+ "dev reset cmpl recd. id %d status %s\n",
+ (int)(id & FNIC_TAG_MASK),
+ fnic_fcpio_status_to_str(hdr_status));
+ return;
+ }
+ if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
+ /* Need to wait for terminate completion */
+ spin_unlock_irqrestore(io_lock, flags);
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "dev reset cmpl recd after time out. "
+ "id %d status %s\n",
+ (int)(id & FNIC_TAG_MASK),
+ fnic_fcpio_status_to_str(hdr_status));
+ return;
+ }
CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"dev reset cmpl recd. id %d status %s\n",
(int)(id & FNIC_TAG_MASK),
@@ -889,7 +972,6 @@ static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
struct fcpio_fw_req *desc)
{
struct fnic *fnic = vnic_dev_priv(vdev);
- int ret = 0;
switch (desc->hdr.type) {
case FCPIO_ACK: /* fw copied copy wq desc to its queue */
@@ -906,11 +988,11 @@ static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
- ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
+ fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
break;
case FCPIO_RESET_CMPL: /* fw completed reset */
- ret = fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
+ fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
break;
default:
@@ -920,7 +1002,7 @@ static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
break;
}
- return ret;
+ return 0;
}
/*
@@ -962,6 +1044,23 @@ static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
io_lock = fnic_io_lock_hash(fnic, sc);
spin_lock_irqsave(io_lock, flags);
io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
+ !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
+ /*
+ * We will be here only when FW completes reset
+ * without sending completions for outstanding ios.
+ */
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
+ if (io_req && io_req->dr_done)
+ complete(io_req->dr_done);
+ else if (io_req && io_req->abts_done)
+ complete(io_req->abts_done);
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
if (!io_req) {
spin_unlock_irqrestore(io_lock, flags);
goto cleanup_scsi_cmd;
@@ -1044,8 +1143,18 @@ static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
struct fnic_io_req *io_req)
{
struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ struct Scsi_Host *host = fnic->lport->host;
unsigned long flags;
+ spin_lock_irqsave(host->host_lock, flags);
+ if (unlikely(fnic_chk_state_flags_locked(fnic,
+ FNIC_FLAGS_IO_BLOCKED))) {
+ spin_unlock_irqrestore(host->host_lock, flags);
+ return 1;
+ } else
+ atomic_inc(&fnic->in_flight);
+ spin_unlock_irqrestore(host->host_lock, flags);
+
spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
@@ -1053,6 +1162,9 @@ static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
if (!vnic_wq_copy_desc_avail(wq)) {
spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+ atomic_dec(&fnic->in_flight);
+ shost_printk(KERN_DEBUG, fnic->lport->host,
+ "fnic_queue_abort_io_req: failure: no descriptors\n");
return 1;
}
fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
@@ -1060,12 +1172,15 @@ static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
fnic->config.ra_tov, fnic->config.ed_tov);
spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+ atomic_dec(&fnic->in_flight);
+
return 0;
}
-void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
+static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
{
int tag;
+ int abt_tag;
struct fnic_io_req *io_req;
spinlock_t *io_lock;
unsigned long flags;
@@ -1075,13 +1190,14 @@ void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
FNIC_SCSI_DBG(KERN_DEBUG,
fnic->lport->host,
- "fnic_rport_reset_exch called portid 0x%06x\n",
+ "fnic_rport_exch_reset called portid 0x%06x\n",
port_id);
if (fnic->in_remove)
return;
for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
+ abt_tag = tag;
sc = scsi_host_find_tag(fnic->lport->host, tag);
if (!sc)
continue;
@@ -1096,6 +1212,15 @@ void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
continue;
}
+ if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
+ (!(CMD_FLAGS(sc) & FNIC_DEV_RST_PENDING))) {
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
+ sc);
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+
/*
* Found IO that is still pending with firmware and
* belongs to rport that went away
@@ -1104,9 +1229,22 @@ void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
spin_unlock_irqrestore(io_lock, flags);
continue;
}
+ if (io_req->abts_done) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "fnic_rport_exch_reset: io_req->abts_done is set "
+ "state is %s\n",
+ fnic_ioreq_state_to_str(CMD_STATE(sc)));
+ }
+
old_ioreq_state = CMD_STATE(sc);
CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+ if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
+ abt_tag = (tag | FNIC_TAG_DEV_RST);
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic_rport_exch_reset dev rst sc 0x%p\n",
+ sc);
+ }
BUG_ON(io_req->abts_done);
@@ -1118,7 +1256,7 @@ void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
/* Now queue the abort command to firmware */
int_to_scsilun(sc->device->lun, &fc_lun);
- if (fnic_queue_abort_io_req(fnic, tag,
+ if (fnic_queue_abort_io_req(fnic, abt_tag,
FCPIO_ITMF_ABT_TASK_TERM,
fc_lun.scsi_lun, io_req)) {
/*
@@ -1127,12 +1265,14 @@ void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
* aborted later by scsi_eh, or cleaned up during
* lun reset
*/
- io_lock = fnic_io_lock_hash(fnic, sc);
-
spin_lock_irqsave(io_lock, flags);
if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
CMD_STATE(sc) = old_ioreq_state;
spin_unlock_irqrestore(io_lock, flags);
+ } else {
+ spin_lock_irqsave(io_lock, flags);
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
+ spin_unlock_irqrestore(io_lock, flags);
}
}
@@ -1141,6 +1281,7 @@ void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
void fnic_terminate_rport_io(struct fc_rport *rport)
{
int tag;
+ int abt_tag;
struct fnic_io_req *io_req;
spinlock_t *io_lock;
unsigned long flags;
@@ -1154,14 +1295,15 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
FNIC_SCSI_DBG(KERN_DEBUG,
fnic->lport->host, "fnic_terminate_rport_io called"
- " wwpn 0x%llx, wwnn0x%llx, portid 0x%06x\n",
- rport->port_name, rport->node_name,
+ " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
+ rport->port_name, rport->node_name, rport,
rport->port_id);
if (fnic->in_remove)
return;
for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
+ abt_tag = tag;
sc = scsi_host_find_tag(fnic->lport->host, tag);
if (!sc)
continue;
@@ -1180,6 +1322,14 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
continue;
}
+ if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
+ (!(CMD_FLAGS(sc) & FNIC_DEV_RST_PENDING))) {
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
+ sc);
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
/*
* Found IO that is still pending with firmware and
* belongs to rport that went away
@@ -1188,9 +1338,20 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
spin_unlock_irqrestore(io_lock, flags);
continue;
}
+ if (io_req->abts_done) {
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "fnic_terminate_rport_io: io_req->abts_done is set "
+ "state is %s\n",
+ fnic_ioreq_state_to_str(CMD_STATE(sc)));
+ }
old_ioreq_state = CMD_STATE(sc);
CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+ if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
+ abt_tag = (tag | FNIC_TAG_DEV_RST);
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
+ }
BUG_ON(io_req->abts_done);
@@ -1203,7 +1364,7 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
/* Now queue the abort command to firmware */
int_to_scsilun(sc->device->lun, &fc_lun);
- if (fnic_queue_abort_io_req(fnic, tag,
+ if (fnic_queue_abort_io_req(fnic, abt_tag,
FCPIO_ITMF_ABT_TASK_TERM,
fc_lun.scsi_lun, io_req)) {
/*
@@ -1212,12 +1373,14 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
* aborted later by scsi_eh, or cleaned up during
* lun reset
*/
- io_lock = fnic_io_lock_hash(fnic, sc);
-
spin_lock_irqsave(io_lock, flags);
if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
CMD_STATE(sc) = old_ioreq_state;
spin_unlock_irqrestore(io_lock, flags);
+ } else {
+ spin_lock_irqsave(io_lock, flags);
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
+ spin_unlock_irqrestore(io_lock, flags);
}
}
@@ -1239,6 +1402,7 @@ int fnic_abort_cmd(struct scsi_cmnd *sc)
int ret = SUCCESS;
u32 task_req;
struct scsi_lun fc_lun;
+ int tag;
DECLARE_COMPLETION_ONSTACK(tm_done);
/* Wait for rport to unblock */
@@ -1249,9 +1413,14 @@ int fnic_abort_cmd(struct scsi_cmnd *sc)
fnic = lport_priv(lp);
rport = starget_to_rport(scsi_target(sc->device));
- FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
- "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %d\n",
- rport->port_id, sc->device->lun, sc->request->tag);
+ tag = sc->request->tag;
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ fnic->lport->host,
+ "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %x flags %x\n",
+ rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
+
+ CMD_FLAGS(sc) = FNIC_NO_FLAGS;
+
if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
ret = FAILED;
@@ -1375,10 +1544,20 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic,
struct fnic_io_req *io_req)
{
struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ struct Scsi_Host *host = fnic->lport->host;
struct scsi_lun fc_lun;
int ret = 0;
unsigned long intr_flags;
+ spin_lock_irqsave(host->host_lock, intr_flags);
+ if (unlikely(fnic_chk_state_flags_locked(fnic,
+ FNIC_FLAGS_IO_BLOCKED))) {
+ spin_unlock_irqrestore(host->host_lock, intr_flags);
+ return FAILED;
+ } else
+ atomic_inc(&fnic->in_flight);
+ spin_unlock_irqrestore(host->host_lock, intr_flags);
+
spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
@@ -1399,6 +1578,7 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic,
lr_io_req_end:
spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+ atomic_dec(&fnic->in_flight);
return ret;
}
@@ -1502,6 +1682,65 @@ clean_pending_aborts_end:
return ret;
}
+/**
+ * fnic_scsi_host_start_tag
+ * Allocates tagid from host's tag list
+ **/
+static inline int
+fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
+{
+ struct blk_queue_tag *bqt = fnic->lport->host->bqt;
+ int tag, ret = SCSI_NO_TAG;
+
+ BUG_ON(!bqt);
+ if (!bqt) {
+ pr_err("Tags are not supported\n");
+ goto end;
+ }
+
+ do {
+ tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1);
+ if (tag >= bqt->max_depth) {
+ pr_err("Tag allocation failure\n");
+ goto end;
+ }
+ } while (test_and_set_bit(tag, bqt->tag_map));
+
+ bqt->tag_index[tag] = sc->request;
+ sc->request->tag = tag;
+ sc->tag = tag;
+ if (!sc->request->special)
+ sc->request->special = sc;
+
+ ret = tag;
+
+end:
+ return ret;
+}
+
+/**
+ * fnic_scsi_host_end_tag
+ * frees tag allocated by fnic_scsi_host_start_tag.
+ **/
+static inline void
+fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
+{
+ struct blk_queue_tag *bqt = fnic->lport->host->bqt;
+ int tag = sc->request->tag;
+
+ if (tag == SCSI_NO_TAG)
+ return;
+
+ BUG_ON(!bqt || !bqt->tag_index[tag]);
+ if (!bqt)
+ return;
+
+ bqt->tag_index[tag] = NULL;
+ clear_bit(tag, bqt->tag_map);
+
+ return;
+}
+
/*
* 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
@@ -1517,7 +1756,10 @@ int fnic_device_reset(struct scsi_cmnd *sc)
int ret = FAILED;
spinlock_t *io_lock;
unsigned long flags;
+ struct scsi_lun fc_lun;
+ int tag;
DECLARE_COMPLETION_ONSTACK(tm_done);
+ int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
/* Wait for rport to unblock */
fc_block_scsi_eh(sc);
@@ -1529,8 +1771,8 @@ int fnic_device_reset(struct scsi_cmnd *sc)
rport = starget_to_rport(scsi_target(sc->device));
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
- "Device reset called FCID 0x%x, LUN 0x%x\n",
- rport->port_id, sc->device->lun);
+ "Device reset called FCID 0x%x, LUN 0x%x sc 0x%p\n",
+ rport->port_id, sc->device->lun, sc);
if (lp->state != LPORT_ST_READY || !(lp->link_up))
goto fnic_device_reset_end;
@@ -1539,6 +1781,16 @@ int fnic_device_reset(struct scsi_cmnd *sc)
if (fc_remote_port_chkready(rport))
goto fnic_device_reset_end;
+ CMD_FLAGS(sc) = (FNIC_DEVICE_RESET | FNIC_BLOCKING_REQ);
+ /* Allocate tag if not present */
+
+ tag = sc->request->tag;
+ if (unlikely(tag < 0)) {
+ tag = fnic_scsi_host_start_tag(fnic, sc);
+ if (unlikely(tag == SCSI_NO_TAG))
+ goto fnic_device_reset_end;
+ tag_gen_flag = 1;
+ }
io_lock = fnic_io_lock_hash(fnic, sc);
spin_lock_irqsave(io_lock, flags);
io_req = (struct fnic_io_req *)CMD_SP(sc);
@@ -1562,8 +1814,7 @@ int fnic_device_reset(struct scsi_cmnd *sc)
CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
spin_unlock_irqrestore(io_lock, flags);
- FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %d\n",
- sc->request->tag);
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
/*
* issue the device reset, if enqueue failed, clean up the ioreq
@@ -1576,6 +1827,9 @@ int fnic_device_reset(struct scsi_cmnd *sc)
io_req->dr_done = NULL;
goto fnic_device_reset_clean;
}
+ spin_lock_irqsave(io_lock, flags);
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_PENDING;
+ spin_unlock_irqrestore(io_lock, flags);
/*
* Wait on the local completion for LUN reset. The io_req may be
@@ -1588,12 +1842,13 @@ int fnic_device_reset(struct scsi_cmnd *sc)
io_req = (struct fnic_io_req *)CMD_SP(sc);
if (!io_req) {
spin_unlock_irqrestore(io_lock, flags);
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
goto fnic_device_reset_end;
}
io_req->dr_done = NULL;
status = CMD_LR_STATUS(sc);
- spin_unlock_irqrestore(io_lock, flags);
/*
* If lun reset not completed, bail out with failed. io_req
@@ -1602,7 +1857,53 @@ int fnic_device_reset(struct scsi_cmnd *sc)
if (status == FCPIO_INVALID_CODE) {
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"Device reset timed out\n");
- goto fnic_device_reset_end;
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
+ spin_unlock_irqrestore(io_lock, flags);
+ int_to_scsilun(sc->device->lun, &fc_lun);
+ /*
+ * Issue abort and terminate on the device reset request.
+ * If q'ing of the abort fails, retry issue it after a delay.
+ */
+ while (1) {
+ spin_lock_irqsave(io_lock, flags);
+ if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
+ spin_unlock_irqrestore(io_lock, flags);
+ break;
+ }
+ spin_unlock_irqrestore(io_lock, flags);
+ if (fnic_queue_abort_io_req(fnic,
+ tag | FNIC_TAG_DEV_RST,
+ FCPIO_ITMF_ABT_TASK_TERM,
+ fc_lun.scsi_lun, io_req)) {
+ wait_for_completion_timeout(&tm_done,
+ msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
+ } else {
+ spin_lock_irqsave(io_lock, flags);
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
+ io_req->abts_done = &tm_done;
+ spin_unlock_irqrestore(io_lock, flags);
+ FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+ "Abort and terminate issued on Device reset "
+ "tag 0x%x sc 0x%p\n", tag, sc);
+ break;
+ }
+ }
+ while (1) {
+ spin_lock_irqsave(io_lock, flags);
+ if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
+ spin_unlock_irqrestore(io_lock, flags);
+ wait_for_completion_timeout(&tm_done,
+ msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
+ break;
+ } else {
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ io_req->abts_done = NULL;
+ goto fnic_device_reset_clean;
+ }
+ }
+ } else {
+ spin_unlock_irqrestore(io_lock, flags);
}
/* Completed, but not successful, clean up the io_req, return fail */
@@ -1650,6 +1951,10 @@ fnic_device_reset_clean:
}
fnic_device_reset_end:
+ /* free tag if it is allocated */
+ if (unlikely(tag_gen_flag))
+ fnic_scsi_host_end_tag(fnic, sc);
+
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"Returning from device reset %s\n",
(ret == SUCCESS) ?
@@ -1735,7 +2040,15 @@ void fnic_scsi_abort_io(struct fc_lport *lp)
DECLARE_COMPLETION_ONSTACK(remove_wait);
/* Issue firmware reset for fnic, wait for reset to complete */
+retry_fw_reset:
spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
+ /* fw reset is in progress, poll for its completion */
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ schedule_timeout(msecs_to_jiffies(100));
+ goto retry_fw_reset;
+ }
+
fnic->remove_wait = &remove_wait;
old_state = fnic->state;
fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
@@ -1776,7 +2089,14 @@ void fnic_scsi_cleanup(struct fc_lport *lp)
struct fnic *fnic = lport_priv(lp);
/* issue fw reset */
+retry_fw_reset:
spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
+ /* fw reset is in progress, poll for its completion */
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ schedule_timeout(msecs_to_jiffies(100));
+ goto retry_fw_reset;
+ }
old_state = fnic->state;
fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.