spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
}
+/**
+ * __lpfc_nvme_xmt_ls_rsp_cmp - Generic completion handler for the
+ * transmission of an NVME LS response.
+ * @phba: Pointer to HBA context object.
+ * @cmdwqe: Pointer to driver command WQE object.
+ * @wcqe: Pointer to driver response CQE object.
+ *
+ * The function is called from SLI ring event handler with no
+ * lock held. The function frees memory resources used for the command
+ * used to send the NVME LS RSP.
+ **/
+void
+__lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
+ struct lpfc_wcqe_complete *wcqe)
+{
+ struct lpfc_async_xchg_ctx *axchg = cmdwqe->context2;
+ struct nvmefc_ls_rsp *ls_rsp = &axchg->ls_rsp;
+ uint32_t status, result;
+
+ status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
+ result = wcqe->parameter;
+
+ if (axchg->state != LPFC_NVME_STE_LS_RSP || axchg->entry_cnt != 2) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_NVME_DISC | LOG_NVME_IOERR,
+ "6410 NVMEx LS cmpl state mismatch IO x%x: "
+ "%d %d\n",
+ axchg->oxid, axchg->state, axchg->entry_cnt);
+ }
+
+ lpfc_nvmeio_data(phba, "NVMEx LS CMPL: xri x%x stat x%x result x%x\n",
+ axchg->oxid, status, result);
+
+ lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
+ "6038 NVMEx LS rsp cmpl: %d %d oxid x%x\n",
+ status, result, axchg->oxid);
+
+ lpfc_nlp_put(cmdwqe->context1);
+ cmdwqe->context2 = NULL;
+ cmdwqe->context3 = NULL;
+ lpfc_sli_release_iocbq(phba, cmdwqe);
+ ls_rsp->done(ls_rsp);
+ lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
+ "6200 NVMEx LS rsp cmpl done status %d oxid x%x\n",
+ status, axchg->oxid);
+ kfree(axchg);
+}
+
/**
* lpfc_nvmet_xmt_ls_rsp_cmp - Completion handler for LS Response
* @phba: Pointer to HBA context object.
*
* The function is called from SLI ring event handler with no
* lock held. This function is the completion handler for NVME LS commands
- * The function frees memory resources used for the NVME commands.
+ * The function updates any states and statistics, then calls the
+ * generic completion handler to free resources.
**/
static void
lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
struct lpfc_wcqe_complete *wcqe)
{
struct lpfc_nvmet_tgtport *tgtp;
- struct nvmefc_ls_rsp *rsp;
- struct lpfc_async_xchg_ctx *ctxp;
uint32_t status, result;
- status = bf_get(lpfc_wcqe_c_status, wcqe);
- result = wcqe->parameter;
- ctxp = cmdwqe->context2;
-
- if (ctxp->state != LPFC_NVME_STE_LS_RSP || ctxp->entry_cnt != 2) {
- lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
- "6410 NVMET LS cmpl state mismatch IO x%x: "
- "%d %d\n",
- ctxp->oxid, ctxp->state, ctxp->entry_cnt);
- }
-
if (!phba->targetport)
- goto out;
+ goto finish;
- tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+ status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
+ result = wcqe->parameter;
+ tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
if (tgtp) {
if (status) {
atomic_inc(&tgtp->xmt_ls_rsp_error);
}
}
-out:
- rsp = &ctxp->ls_rsp;
-
- lpfc_nvmeio_data(phba, "NVMET LS CMPL: xri x%x stat x%x result x%x\n",
- ctxp->oxid, status, result);
-
- lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
- "6038 NVMET LS rsp cmpl: %d %d oxid x%x\n",
- status, result, ctxp->oxid);
-
- lpfc_nlp_put(cmdwqe->context1);
- cmdwqe->context2 = NULL;
- cmdwqe->context3 = NULL;
- lpfc_sli_release_iocbq(phba, cmdwqe);
- rsp->done(rsp);
- kfree(ctxp);
+finish:
+ __lpfc_nvme_xmt_ls_rsp_cmp(phba, cmdwqe, wcqe);
}
/**
#endif
}
-static int
-lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port *tgtport,
- struct nvmefc_ls_rsp *rsp)
+/**
+ * __lpfc_nvme_xmt_ls_rsp - Generic service routine to issue transmit
+ * an NVME LS rsp for a prior NVME LS request that was received.
+ * @axchg: pointer to exchange context for the NVME LS request the response
+ * is for.
+ * @ls_rsp: pointer to the transport LS RSP that is to be sent
+ * @xmt_ls_rsp_cmp: completion routine to call upon RSP transmit done
+ *
+ * This routine is used to format and send a WQE to transmit a NVME LS
+ * Response. The response is for a prior NVME LS request that was
+ * received and posted to the transport.
+ *
+ * Returns:
+ * 0 : if response successfully transmit
+ * non-zero : if response failed to transmit, of the form -Exxx.
+ **/
+int
+__lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
+ struct nvmefc_ls_rsp *ls_rsp,
+ void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
+ struct lpfc_iocbq *cmdwqe,
+ struct lpfc_wcqe_complete *wcqe))
{
- struct lpfc_async_xchg_ctx *ctxp =
- container_of(rsp, struct lpfc_async_xchg_ctx, ls_rsp);
- struct lpfc_hba *phba = ctxp->phba;
- struct hbq_dmabuf *nvmebuf =
- (struct hbq_dmabuf *)ctxp->rqb_buffer;
+ struct lpfc_hba *phba = axchg->phba;
+ struct hbq_dmabuf *nvmebuf = (struct hbq_dmabuf *)axchg->rqb_buffer;
struct lpfc_iocbq *nvmewqeq;
- struct lpfc_nvmet_tgtport *nvmep = tgtport->private;
struct lpfc_dmabuf dmabuf;
struct ulp_bde64 bpl;
int rc;
- if (phba->pport->load_flag & FC_UNLOADING)
- return -ENODEV;
-
if (phba->pport->load_flag & FC_UNLOADING)
return -ENODEV;
lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
- "6023 NVMET LS rsp oxid x%x\n", ctxp->oxid);
+ "6023 NVMEx LS rsp oxid x%x\n", axchg->oxid);
- if ((ctxp->state != LPFC_NVME_STE_LS_RCV) ||
- (ctxp->entry_cnt != 1)) {
- lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
- "6412 NVMET LS rsp state mismatch "
+ if (axchg->state != LPFC_NVME_STE_LS_RCV || axchg->entry_cnt != 1) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_NVME_DISC | LOG_NVME_IOERR,
+ "6412 NVMEx LS rsp state mismatch "
"oxid x%x: %d %d\n",
- ctxp->oxid, ctxp->state, ctxp->entry_cnt);
+ axchg->oxid, axchg->state, axchg->entry_cnt);
+ return -EALREADY;
}
- ctxp->state = LPFC_NVME_STE_LS_RSP;
- ctxp->entry_cnt++;
+ axchg->state = LPFC_NVME_STE_LS_RSP;
+ axchg->entry_cnt++;
- nvmewqeq = lpfc_nvmet_prep_ls_wqe(phba, ctxp, rsp->rspdma,
- rsp->rsplen);
+ nvmewqeq = lpfc_nvmet_prep_ls_wqe(phba, axchg, ls_rsp->rspdma,
+ ls_rsp->rsplen);
if (nvmewqeq == NULL) {
- atomic_inc(&nvmep->xmt_ls_drop);
- lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
- "6150 LS Drop IO x%x: Prep\n",
- ctxp->oxid);
- lpfc_in_buf_free(phba, &nvmebuf->dbuf);
- atomic_inc(&nvmep->xmt_ls_abort);
- lpfc_nvme_unsol_ls_issue_abort(phba, ctxp,
- ctxp->sid, ctxp->oxid);
- return -ENOMEM;
+ lpfc_printf_log(phba, KERN_ERR,
+ LOG_NVME_DISC | LOG_NVME_IOERR | LOG_NVME_ABTS,
+ "6150 NVMEx LS Drop Rsp x%x: Prep\n",
+ axchg->oxid);
+ rc = -ENOMEM;
+ goto out_free_buf;
}
/* Save numBdes for bpl2sgl */
dmabuf.virt = &bpl;
bpl.addrLow = nvmewqeq->wqe.xmit_sequence.bde.addrLow;
bpl.addrHigh = nvmewqeq->wqe.xmit_sequence.bde.addrHigh;
- bpl.tus.f.bdeSize = rsp->rsplen;
+ bpl.tus.f.bdeSize = ls_rsp->rsplen;
bpl.tus.f.bdeFlags = 0;
bpl.tus.w = le32_to_cpu(bpl.tus.w);
+ /*
+ * Note: although we're using stack space for the dmabuf, the
+ * call to lpfc_sli4_issue_wqe is synchronous, so it will not
+ * be referenced after it returns back to this routine.
+ */
- nvmewqeq->wqe_cmpl = lpfc_nvmet_xmt_ls_rsp_cmp;
+ nvmewqeq->wqe_cmpl = xmt_ls_rsp_cmp;
nvmewqeq->iocb_cmpl = NULL;
- nvmewqeq->context2 = ctxp;
+ nvmewqeq->context2 = axchg;
- lpfc_nvmeio_data(phba, "NVMET LS RESP: xri x%x wqidx x%x len x%x\n",
- ctxp->oxid, nvmewqeq->hba_wqidx, rsp->rsplen);
+ lpfc_nvmeio_data(phba, "NVMEx LS RSP: xri x%x wqidx x%x len x%x\n",
+ axchg->oxid, nvmewqeq->hba_wqidx, ls_rsp->rsplen);
+
+ rc = lpfc_sli4_issue_wqe(phba, axchg->hdwq, nvmewqeq);
+
+ /* clear to be sure there's no reference */
+ nvmewqeq->context3 = NULL;
- rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
if (rc == WQE_SUCCESS) {
/*
* Okay to repost buffer here, but wait till cmpl
* before freeing ctxp and iocbq.
*/
lpfc_in_buf_free(phba, &nvmebuf->dbuf);
- atomic_inc(&nvmep->xmt_ls_rsp);
return 0;
}
- /* Give back resources */
- atomic_inc(&nvmep->xmt_ls_drop);
- lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
- "6151 LS Drop IO x%x: Issue %d\n",
- ctxp->oxid, rc);
+
+ lpfc_printf_log(phba, KERN_ERR,
+ LOG_NVME_DISC | LOG_NVME_IOERR | LOG_NVME_ABTS,
+ "6151 NVMEx LS RSP x%x: failed to transmit %d\n",
+ axchg->oxid, rc);
+
+ rc = -ENXIO;
lpfc_nlp_put(nvmewqeq->context1);
+out_free_buf:
+ /* Give back resources */
lpfc_in_buf_free(phba, &nvmebuf->dbuf);
- atomic_inc(&nvmep->xmt_ls_abort);
- lpfc_nvme_unsol_ls_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
- return -ENXIO;
+
+ /*
+ * As transport doesn't track completions of responses, if the rsp
+ * fails to send, the transport will effectively ignore the rsp
+ * and consider the LS done. However, the driver has an active
+ * exchange open for the LS - so be sure to abort the exchange
+ * if the response isn't sent.
+ */
+ lpfc_nvme_unsol_ls_issue_abort(phba, axchg, axchg->sid, axchg->oxid);
+ return rc;
+}
+
+/**
+ * lpfc_nvmet_xmt_ls_rsp - Transmit NVME LS response
+ * @tgtport: pointer to target port that NVME LS is to be transmit from.
+ * @ls_rsp: pointer to the transport LS RSP that is to be sent
+ *
+ * Driver registers this routine to transmit responses for received NVME
+ * LS requests.
+ *
+ * This routine is used to format and send a WQE to transmit a NVME LS
+ * Response. The ls_rsp is used to reverse-map the LS to the original
+ * NVME LS request sequence, which provides addressing information for
+ * the remote port the LS to be sent to, as well as the exchange id
+ * that is the LS is bound to.
+ *
+ * Returns:
+ * 0 : if response successfully transmit
+ * non-zero : if response failed to transmit, of the form -Exxx.
+ **/
+static int
+lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port *tgtport,
+ struct nvmefc_ls_rsp *ls_rsp)
+{
+ struct lpfc_async_xchg_ctx *axchg =
+ container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
+ struct lpfc_nvmet_tgtport *nvmep = tgtport->private;
+ int rc;
+
+ if (axchg->phba->pport->load_flag & FC_UNLOADING)
+ return -ENODEV;
+
+ rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, lpfc_nvmet_xmt_ls_rsp_cmp);
+
+ if (rc) {
+ atomic_inc(&nvmep->xmt_ls_drop);
+ /*
+ * unless the failure is due to having already sent
+ * the response, an abort will be generated for the
+ * exchange if the rsp can't be sent.
+ */
+ if (rc != -EALREADY)
+ atomic_inc(&nvmep->xmt_ls_abort);
+ return rc;
+ }
+
+ atomic_inc(&nvmep->xmt_ls_rsp);
+ return 0;
}
static int
projects / linux-2.6-microblaze.git / commitdiff