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lpfc: nvmet: Add Send LS Request and Abort LS Request support

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Now that common helpers exist, add the ability to Send an NVME LS Request
and to Abort an outstanding LS Request to the nvmet side of the driver.

Signed-off-by: Paul Ely <paul.ely@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
James Smart 2020-03-31 09:50:11 -07:00 committed by Jens Axboe
parent 4c2805aab5
commit 54840bed37
1 changed files with 95 additions and 0 deletions
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95
drivers/scsi/lpfc/lpfc_nvmet.c
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@ -1282,6 +1282,98 @@ lpfc_nvmet_defer_rcv(struct nvmet_fc_target_port *tgtport,
spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
}
/**
* lpfc_nvmet_ls_req_cmp - completion handler for a nvme ls request
* @phba: Pointer to HBA context object
* @cmdwqe: Pointer to driver command WQE object.
* @wcqe: Pointer to driver response CQE object.
*
* This function is the completion handler for NVME LS requests.
* The function updates any states and statistics, then calls the
* generic completion handler to finish completion of the request.
**/
static void
lpfc_nvmet_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
struct lpfc_wcqe_complete *wcqe)
{
__lpfc_nvme_ls_req_cmp(phba, cmdwqe->vport, cmdwqe, wcqe);
}
/**
* lpfc_nvmet_ls_req - Issue an Link Service request
* @targetport - pointer to target instance registered with nvmet transport.
* @hosthandle - hosthandle set by the driver in a prior ls_rqst_rcv.
* Driver sets this value to the ndlp pointer.
* @pnvme_lsreq - the transport nvme_ls_req structure for the LS
*
* Driver registers this routine to handle any link service request
* from the nvme_fc transport to a remote nvme-aware port.
*
* Return value :
* 0 - Success
* non-zero: various error codes, in form of -Exxx
**/
static int
lpfc_nvmet_ls_req(struct nvmet_fc_target_port *targetport,
void *hosthandle,
struct nvmefc_ls_req *pnvme_lsreq)
{
struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
struct lpfc_hba *phba;
struct lpfc_nodelist *ndlp;
int ret;
u32 hstate;
if (!lpfc_nvmet)
return -EINVAL;
phba = lpfc_nvmet->phba;
if (phba->pport->load_flag & FC_UNLOADING)
return -EINVAL;
hstate = atomic_read(&lpfc_nvmet->state);
if (hstate == LPFC_NVMET_INV_HOST_ACTIVE)
return -EACCES;
ndlp = (struct lpfc_nodelist *)hosthandle;
ret = __lpfc_nvme_ls_req(phba->pport, ndlp, pnvme_lsreq,
lpfc_nvmet_ls_req_cmp);
return ret;
}
/**
* lpfc_nvmet_ls_abort - Abort a prior NVME LS request
* @targetport: Transport targetport, that LS was issued from.
* @hosthandle - hosthandle set by the driver in a prior ls_rqst_rcv.
* Driver sets this value to the ndlp pointer.
* @pnvme_lsreq - the transport nvme_ls_req structure for LS to be aborted
*
* Driver registers this routine to abort an NVME LS request that is
* in progress (from the transports perspective).
**/
static void
lpfc_nvmet_ls_abort(struct nvmet_fc_target_port *targetport,
void *hosthandle,
struct nvmefc_ls_req *pnvme_lsreq)
{
struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
struct lpfc_hba *phba;
struct lpfc_nodelist *ndlp;
int ret;
phba = lpfc_nvmet->phba;
if (phba->pport->load_flag & FC_UNLOADING)
return;
ndlp = (struct lpfc_nodelist *)hosthandle;
ret = __lpfc_nvme_ls_abort(phba->pport, ndlp, pnvme_lsreq);
if (!ret)
atomic_inc(&lpfc_nvmet->xmt_ls_abort);
}
static void
lpfc_nvmet_host_release(void *hosthandle)
{
@ -1324,6 +1416,8 @@ static struct nvmet_fc_target_template lpfc_tgttemplate = {
.fcp_req_release = lpfc_nvmet_xmt_fcp_release,
.defer_rcv = lpfc_nvmet_defer_rcv,
.discovery_event = lpfc_nvmet_discovery_event,
.ls_req = lpfc_nvmet_ls_req,
.ls_abort = lpfc_nvmet_ls_abort,
.host_release = lpfc_nvmet_host_release,
.max_hw_queues = 1,
@ -1335,6 +1429,7 @@ static struct nvmet_fc_target_template lpfc_tgttemplate = {
.target_features = 0,
/* sizes of additional private data for data structures */
.target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
.lsrqst_priv_sz = 0,
};
static void