static int fnic_slave_alloc(struct scsi_device *sdev)
{
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
scsi_change_queue_depth(sdev, fnic_max_qdepth);
return 0;
}
static int fnic_slave_alloc(struct scsi_device *sdev)
{
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
sdev->tagged_supported = 1;
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
scsi_activate_tcq(sdev, FNIC_DFLT_QUEUE_DEPTH);
return 0;
}
static
int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
{
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
int status, scsi_result, ret;
/* reset the status for this request */
scpnt->result = 0;
scpnt->host_scribble = NULL;
scsi_result = fc_remote_port_chkready(rport);
if (unlikely(scsi_result)) {
scpnt->result = scsi_result;
zfcp_dbf_scsi_fail_send(scpnt);
scpnt->scsi_done(scpnt);
return 0;
}
status = atomic_read(&zfcp_sdev->status);
if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
!(atomic_read(&zfcp_sdev->port->status) &
ZFCP_STATUS_COMMON_ERP_FAILED)) {
/* only LUN access denied, but port is good
* not covered by FC transport, have to fail here */
zfcp_scsi_command_fail(scpnt, DID_ERROR);
return 0;
}
if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
/* This could be either
* open LUN pending: this is temporary, will result in
* open LUN or ERP_FAILED, so retry command
* call to rport_delete pending: mimic retry from
* fc_remote_port_chkready until rport is BLOCKED
*/
zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
return 0;
}
ret = zfcp_fsf_fcp_cmnd(scpnt);
if (unlikely(ret == -EBUSY))
return SCSI_MLQUEUE_DEVICE_BUSY;
else if (unlikely(ret < 0))
return SCSI_MLQUEUE_HOST_BUSY;
return ret;
}
static int fnic_slave_alloc(struct scsi_device *sdev)
{
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
struct fc_lport *lp = shost_priv(sdev->host);
struct fnic *fnic = lport_priv(lp);
sdev->tagged_supported = 1;
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
if (sdev->tagged_supported)
scsi_activate_tcq(sdev, fnic_max_qdepth);
rport->dev_loss_tmo = fnic->config.port_down_timeout / 1000;
return 0;
}
static
int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
{
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
int status, scsi_result, ret;
scpnt->result = 0;
scpnt->host_scribble = NULL;
scsi_result = fc_remote_port_chkready(rport);
if (unlikely(scsi_result)) {
scpnt->result = scsi_result;
zfcp_dbf_scsi_fail_send(scpnt);
scpnt->scsi_done(scpnt);
return 0;
}
status = atomic_read(&zfcp_sdev->status);
if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
!(atomic_read(&zfcp_sdev->port->status) &
ZFCP_STATUS_COMMON_ERP_FAILED)) {
zfcp_scsi_command_fail(scpnt, DID_ERROR);
return 0;
}
if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
return 0;
}
ret = zfcp_fsf_fcp_cmnd(scpnt);
if (unlikely(ret == -EBUSY))
return SCSI_MLQUEUE_DEVICE_BUSY;
else if (unlikely(ret < 0))
return SCSI_MLQUEUE_HOST_BUSY;
return ret;
}
static int bnx2fc_initiate_els(struct bnx2fc_rport *tgt, unsigned int op,
void *data, u32 data_len,
void (*cb_func)(struct bnx2fc_els_cb_arg *cb_arg),
struct bnx2fc_els_cb_arg *cb_arg, u32 timer_msec)
{
struct fcoe_port *port = tgt->port;
struct bnx2fc_interface *interface = port->priv;
struct fc_rport *rport = tgt->rport;
struct fc_lport *lport = port->lport;
struct bnx2fc_cmd *els_req;
struct bnx2fc_mp_req *mp_req;
struct fc_frame_header *fc_hdr;
struct fcoe_task_ctx_entry *task;
struct fcoe_task_ctx_entry *task_page;
int rc = 0;
int task_idx, index;
u32 did, sid;
u16 xid;
rc = fc_remote_port_chkready(rport);
if (rc) {
printk(KERN_ERR PFX "els 0x%x: rport not ready\n", op);
rc = -EINVAL;
goto els_err;
}
if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
printk(KERN_ERR PFX "els 0x%x: link is not ready\n", op);
rc = -EINVAL;
goto els_err;
}
if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) ||
(test_bit(BNX2FC_FLAG_EXPL_LOGO, &tgt->flags))) {
printk(KERN_ERR PFX "els 0x%x: tgt not ready\n", op);
rc = -EINVAL;
goto els_err;
}
els_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ELS);
if (!els_req) {
rc = -ENOMEM;
goto els_err;
}
els_req->sc_cmd = NULL;
els_req->port = port;
els_req->tgt = tgt;
els_req->cb_func = cb_func;
cb_arg->io_req = els_req;
els_req->cb_arg = cb_arg;
mp_req = (struct bnx2fc_mp_req *)&(els_req->mp_req);
rc = bnx2fc_init_mp_req(els_req);
if (rc == FAILED) {
printk(KERN_ERR PFX "ELS MP request init failed\n");
spin_lock_bh(&tgt->tgt_lock);
kref_put(&els_req->refcount, bnx2fc_cmd_release);
spin_unlock_bh(&tgt->tgt_lock);
rc = -ENOMEM;
goto els_err;
} else {
/* rc SUCCESS */
rc = 0;
}
/* Set the data_xfer_len to the size of ELS payload */
mp_req->req_len = data_len;
els_req->data_xfer_len = mp_req->req_len;
/* Fill ELS Payload */
if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS)) {
memcpy(mp_req->req_buf, data, data_len);
} else {
printk(KERN_ERR PFX "Invalid ELS op 0x%x\n", op);
els_req->cb_func = NULL;
els_req->cb_arg = NULL;
spin_lock_bh(&tgt->tgt_lock);
kref_put(&els_req->refcount, bnx2fc_cmd_release);
spin_unlock_bh(&tgt->tgt_lock);
rc = -EINVAL;
}
if (rc)
goto els_err;
/* Fill FC header */
fc_hdr = &(mp_req->req_fc_hdr);
did = tgt->rport->port_id;
sid = tgt->sid;
if (op == ELS_SRR)
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS4_REQ, did, sid,
FC_TYPE_FCP, FC_FC_FIRST_SEQ |
FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
else
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS_REQ, did, sid,
FC_TYPE_ELS, FC_FC_FIRST_SEQ |
FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
/* Obtain exchange id */
xid = els_req->xid;
task_idx = xid/BNX2FC_TASKS_PER_PAGE;
index = xid % BNX2FC_TASKS_PER_PAGE;
/* Initialize task context for this IO request */
task_page = (struct fcoe_task_ctx_entry *)
interface->hba->task_ctx[task_idx];
task = &(task_page[index]);
bnx2fc_init_mp_task(els_req, task);
spin_lock_bh(&tgt->tgt_lock);
if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
printk(KERN_ERR PFX "initiate_els.. session not ready\n");
els_req->cb_func = NULL;
els_req->cb_arg = NULL;
kref_put(&els_req->refcount, bnx2fc_cmd_release);
spin_unlock_bh(&tgt->tgt_lock);
return -EINVAL;
}
if (timer_msec)
bnx2fc_cmd_timer_set(els_req, timer_msec);
bnx2fc_add_2_sq(tgt, xid);
els_req->on_active_queue = 1;
list_add_tail(&els_req->link, &tgt->els_queue);
/* Ring doorbell */
bnx2fc_ring_doorbell(tgt);
spin_unlock_bh(&tgt->tgt_lock);
els_err:
return rc;
}
/* It's assumed that the lock is held when calling this function. */
static int qedf_initiate_els(struct qedf_rport *fcport, unsigned int op,
void *data, uint32_t data_len,
void (*cb_func)(struct qedf_els_cb_arg *cb_arg),
struct qedf_els_cb_arg *cb_arg, uint32_t timer_msec)
{
struct qedf_ctx *qedf = fcport->qedf;
struct fc_lport *lport = qedf->lport;
struct qedf_ioreq *els_req;
struct qedf_mp_req *mp_req;
struct fc_frame_header *fc_hdr;
struct e4_fcoe_task_context *task;
int rc = 0;
uint32_t did, sid;
uint16_t xid;
uint32_t start_time = jiffies / HZ;
uint32_t current_time;
struct fcoe_wqe *sqe;
unsigned long flags;
u16 sqe_idx;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending ELS\n");
rc = fc_remote_port_chkready(fcport->rport);
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: rport not ready\n", op);
rc = -EAGAIN;
goto els_err;
}
if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: link is not ready\n",
op);
rc = -EAGAIN;
goto els_err;
}
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: fcport not ready\n", op);
rc = -EINVAL;
goto els_err;
}
retry_els:
els_req = qedf_alloc_cmd(fcport, QEDF_ELS);
if (!els_req) {
current_time = jiffies / HZ;
if ((current_time - start_time) > 10) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"els: Failed els 0x%x\n", op);
rc = -ENOMEM;
goto els_err;
}
mdelay(20 * USEC_PER_MSEC);
goto retry_els;
}
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "initiate_els els_req = "
"0x%p cb_arg = %p xid = %x\n", els_req, cb_arg,
els_req->xid);
els_req->sc_cmd = NULL;
els_req->cmd_type = QEDF_ELS;
els_req->fcport = fcport;
els_req->cb_func = cb_func;
cb_arg->io_req = els_req;
cb_arg->op = op;
els_req->cb_arg = cb_arg;
els_req->data_xfer_len = data_len;
/* Record which cpu this request is associated with */
els_req->cpu = smp_processor_id();
mp_req = (struct qedf_mp_req *)&(els_req->mp_req);
rc = qedf_init_mp_req(els_req);
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "ELS MP request init failed\n");
kref_put(&els_req->refcount, qedf_release_cmd);
goto els_err;
} else {
rc = 0;
}
/* Fill ELS Payload */
if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS)) {
memcpy(mp_req->req_buf, data, data_len);
} else {
QEDF_ERR(&(qedf->dbg_ctx), "Invalid ELS op 0x%x\n", op);
els_req->cb_func = NULL;
els_req->cb_arg = NULL;
kref_put(&els_req->refcount, qedf_release_cmd);
rc = -EINVAL;
}
if (rc)
goto els_err;
/* Fill FC header */
fc_hdr = &(mp_req->req_fc_hdr);
did = fcport->rdata->ids.port_id;
sid = fcport->sid;
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS_REQ, did, sid,
FC_TYPE_ELS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
FC_FC_SEQ_INIT, 0);
/* Obtain exchange id */
xid = els_req->xid;
spin_lock_irqsave(&fcport->rport_lock, flags);
sqe_idx = qedf_get_sqe_idx(fcport);
sqe = &fcport->sq[sqe_idx];
memset(sqe, 0, sizeof(struct fcoe_wqe));
/* Initialize task context for this IO request */
task = qedf_get_task_mem(&qedf->tasks, xid);
qedf_init_mp_task(els_req, task, sqe);
/* Put timer on original I/O request */
if (timer_msec)
qedf_cmd_timer_set(qedf, els_req, timer_msec);
/* Ring doorbell */
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Ringing doorbell for ELS "
"req\n");
qedf_ring_doorbell(fcport);
spin_unlock_irqrestore(&fcport->rport_lock, flags);
els_err:
return rc;
}
