From 604a3e3042eb89ffaa4f735ef9208281aae786c7 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Sat, 29 Oct 2005 10:28:33 -0500 Subject: [SCSI] lpfc: Fix for "command completion for iotax x?? not found" From: James Smart There were scenarios where the error handlers could reuse an iotag value of an active io. Remove all possibility of this by pre-assigning iotag resources to command resources. Signed-off-by: James Smart Rejections fixed up and Signed-off-by: James Bottomley --- drivers/scsi/lpfc/lpfc_sli.c | 281 +++++++++++++++++++------------------------ 1 file changed, 122 insertions(+), 159 deletions(-) (limited to 'drivers/scsi/lpfc/lpfc_sli.c') diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 71ff2b6a642..a8097e6c9dc 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -65,6 +65,18 @@ typedef enum _lpfc_iocb_type { LPFC_ABORT_IOCB } lpfc_iocb_type; +void +lpfc_sli_release_iocbq(struct lpfc_hba * phba, struct lpfc_iocbq * iocbq) +{ + size_t start_clean = (size_t)(&((struct lpfc_iocbq *)NULL)->iocb); + + /* + * Clean all volatile data fields, preserve iotag and node struct. + */ + memset((char*)iocbq + start_clean, 0, sizeof(*iocbq) - start_clean); + list_add_tail(&iocbq->list, &phba->lpfc_iocb_list); +} + /* * Translate the iocb command to an iocb command type used to decide the final * disposition of each completed IOCB. @@ -265,41 +277,69 @@ lpfc_sli_next_iocb_slot (struct lpfc_hba *phba, struct lpfc_sli_ring *pring) return iocb; } -static uint32_t -lpfc_sli_next_iotag(struct lpfc_hba * phba, struct lpfc_sli_ring * pring) +uint16_t +lpfc_sli_next_iotag(struct lpfc_hba * phba, struct lpfc_iocbq * iocbq) { - uint32_t search_start; + struct lpfc_iocbq ** new_arr; + struct lpfc_iocbq ** old_arr; + size_t new_len; + struct lpfc_sli *psli = &phba->sli; + uint16_t iotag; - if (pring->fast_lookup == NULL) { - pring->iotag_ctr++; - if (pring->iotag_ctr >= pring->iotag_max) - pring->iotag_ctr = 1; - return pring->iotag_ctr; + spin_lock_irq(phba->host->host_lock); + iotag = psli->last_iotag; + if(++iotag < psli->iocbq_lookup_len) { + psli->last_iotag = iotag; + psli->iocbq_lookup[iotag] = iocbq; + spin_unlock_irq(phba->host->host_lock); + iocbq->iotag = iotag; + return iotag; + } + else if (psli->iocbq_lookup_len < (0xffff + - LPFC_IOCBQ_LOOKUP_INCREMENT)) { + new_len = psli->iocbq_lookup_len + LPFC_IOCBQ_LOOKUP_INCREMENT; + spin_unlock_irq(phba->host->host_lock); + new_arr = kmalloc(new_len * sizeof (struct lpfc_iocbq *), + GFP_KERNEL); + if (new_arr) { + memset((char *)new_arr, 0, + new_len * sizeof (struct lpfc_iocbq *)); + spin_lock_irq(phba->host->host_lock); + old_arr = psli->iocbq_lookup; + if (new_len <= psli->iocbq_lookup_len) { + /* highly unprobable case */ + kfree(new_arr); + iotag = psli->last_iotag; + if(++iotag < psli->iocbq_lookup_len) { + psli->last_iotag = iotag; + psli->iocbq_lookup[iotag] = iocbq; + spin_unlock_irq(phba->host->host_lock); + iocbq->iotag = iotag; + return iotag; + } + spin_unlock_irq(phba->host->host_lock); + return 0; + } + if (psli->iocbq_lookup) + memcpy(new_arr, old_arr, + ((psli->last_iotag + 1) * + sizeof (struct lpfc_iocbq *))); + psli->iocbq_lookup = new_arr; + psli->iocbq_lookup_len = new_len; + psli->last_iotag = iotag; + psli->iocbq_lookup[iotag] = iocbq; + spin_unlock_irq(phba->host->host_lock); + iocbq->iotag = iotag; + kfree(old_arr); + return iotag; + } } - search_start = pring->iotag_ctr; - - do { - pring->iotag_ctr++; - if (pring->iotag_ctr >= pring->fast_iotag) - pring->iotag_ctr = 1; - - if (*(pring->fast_lookup + pring->iotag_ctr) == NULL) - return pring->iotag_ctr; - - } while (pring->iotag_ctr != search_start); + lpfc_printf_log(phba, KERN_ERR,LOG_SLI, + "%d:0318 Failed to allocate IOTAG.last IOTAG is %d\n", + phba->brd_no, psli->last_iotag); - /* - * Outstanding I/O count for ring is at max - */ - lpfc_printf_log(phba, - KERN_ERR, - LOG_SLI, - "%d:0318 Outstanding I/O count for ring %d is at max x%x\n", - phba->brd_no, - pring->ringno, - pring->fast_iotag); - return (0); + return 0; } static void @@ -307,10 +347,9 @@ lpfc_sli_submit_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, IOCB_t *iocb, struct lpfc_iocbq *nextiocb) { /* - * Allocate and set up an iotag + * Set up an iotag */ - nextiocb->iocb.ulpIoTag = - lpfc_sli_next_iotag(phba, &phba->sli.ring[phba->sli.fcp_ring]); + nextiocb->iocb.ulpIoTag = (nextiocb->iocb_cmpl) ? nextiocb->iotag : 0; /* * Issue iocb command to adapter @@ -326,9 +365,8 @@ lpfc_sli_submit_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, */ if (nextiocb->iocb_cmpl) lpfc_sli_ringtxcmpl_put(phba, pring, nextiocb); - else { - list_add_tail(&nextiocb->list, &phba->lpfc_iocb_list); - } + else + lpfc_sli_release_iocbq(phba, nextiocb); /* * Let the HBA know what IOCB slot will be the next one the @@ -752,80 +790,28 @@ lpfc_sli_process_unsol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, } static struct lpfc_iocbq * -lpfc_sli_txcmpl_ring_search_slow(struct lpfc_sli_ring * pring, - struct lpfc_iocbq * prspiocb) +lpfc_sli_iocbq_lookup(struct lpfc_hba * phba, + struct lpfc_sli_ring * pring, + struct lpfc_iocbq * prspiocb) { - IOCB_t *icmd = NULL; - IOCB_t *irsp = NULL; - struct lpfc_iocbq *cmd_iocb; - struct lpfc_iocbq *iocb, *next_iocb; - uint16_t iotag; - - irsp = &prspiocb->iocb; - iotag = irsp->ulpIoTag; - cmd_iocb = NULL; - - /* Search through txcmpl from the begining */ - list_for_each_entry_safe(iocb, next_iocb, &(pring->txcmplq), list) { - icmd = &iocb->iocb; - if (iotag == icmd->ulpIoTag) { - /* Found a match. */ - cmd_iocb = iocb; - list_del(&iocb->list); - pring->txcmplq_cnt--; - break; - } - } - - return (cmd_iocb); -} - -static struct lpfc_iocbq * -lpfc_sli_txcmpl_ring_iotag_lookup(struct lpfc_hba * phba, - struct lpfc_sli_ring * pring, - struct lpfc_iocbq * prspiocb) -{ - IOCB_t *irsp = NULL; struct lpfc_iocbq *cmd_iocb = NULL; uint16_t iotag; - if (unlikely(pring->fast_lookup == NULL)) - return NULL; - - /* Use fast lookup based on iotag for completion */ - irsp = &prspiocb->iocb; - iotag = irsp->ulpIoTag; - if (iotag < pring->fast_iotag) { - cmd_iocb = *(pring->fast_lookup + iotag); - *(pring->fast_lookup + iotag) = NULL; - if (cmd_iocb) { - list_del(&cmd_iocb->list); - pring->txcmplq_cnt--; - return cmd_iocb; - } else { - /* - * This is clearly an error. A ring that uses iotags - * should never have a interrupt for a completion that - * is not on the ring. Return NULL and log a error. - */ - lpfc_printf_log(phba, KERN_ERR, LOG_SLI, - "%d:0327 Rsp ring %d error - command " - "completion for iotag x%x not found\n", - phba->brd_no, pring->ringno, iotag); - return NULL; - } + iotag = prspiocb->iocb.ulpIoTag; + + if (iotag != 0 && iotag <= phba->sli.last_iotag) { + cmd_iocb = phba->sli.iocbq_lookup[iotag]; + list_del(&cmd_iocb->list); + pring->txcmplq_cnt--; + return cmd_iocb; } - /* - * Rsp ring get: iotag greater then - * configured max wd0 . This is an - * error. Just return NULL. - */ lpfc_printf_log(phba, KERN_ERR, LOG_SLI, - "%d:0317 Rsp ring %d get: iotag x%x greater then " - "configured max x%x wd0 x%x\n", - phba->brd_no, pring->ringno, iotag, pring->fast_iotag, - *(((uint32_t *) irsp) + 7)); + "%d:0317 iotag x%x is out off " + "range: max iotag x%x wd0 x%x\n", + phba->brd_no, iotag, + phba->sli.last_iotag, + *(((uint32_t *) &prspiocb->iocb) + 7)); return NULL; } @@ -839,7 +825,7 @@ lpfc_sli_process_sol_iocb(struct lpfc_hba * phba, struct lpfc_sli_ring * pring, /* Based on the iotag field, get the cmd IOCB from the txcmplq */ spin_lock_irqsave(phba->host->host_lock, iflag); - cmdiocbp = lpfc_sli_txcmpl_ring_search_slow(pring, saveq); + cmdiocbp = lpfc_sli_iocbq_lookup(phba, pring, saveq); if (cmdiocbp) { if (cmdiocbp->iocb_cmpl) { /* @@ -861,9 +847,8 @@ lpfc_sli_process_sol_iocb(struct lpfc_hba * phba, struct lpfc_sli_ring * pring, (cmdiocbp->iocb_cmpl) (phba, cmdiocbp, saveq); spin_lock_irqsave(phba->host->host_lock, iflag); } - } else { - list_add_tail(&cmdiocbp->list, &phba->lpfc_iocb_list); - } + } else + lpfc_sli_release_iocbq(phba, cmdiocbp); } else { /* * Unknown initiating command based on the response iotag. @@ -990,9 +975,8 @@ lpfc_sli_handle_fast_ring_event(struct lpfc_hba * phba, break; } - cmdiocbq = lpfc_sli_txcmpl_ring_iotag_lookup(phba, - pring, - &rspiocbq); + cmdiocbq = lpfc_sli_iocbq_lookup(phba, pring, + &rspiocbq); if ((cmdiocbq) && (cmdiocbq->iocb_cmpl)) { spin_unlock_irqrestore( phba->host->host_lock, iflag); @@ -1213,8 +1197,8 @@ lpfc_sli_handle_slow_ring_event(struct lpfc_hba * phba, } else if (type == LPFC_ABORT_IOCB) { if ((irsp->ulpCommand != CMD_XRI_ABORTED_CX) && ((cmdiocbp = - lpfc_sli_txcmpl_ring_search_slow(pring, - saveq)))) { + lpfc_sli_iocbq_lookup(phba, pring, + saveq)))) { /* Call the specified completion routine */ if (cmdiocbp->iocb_cmpl) { @@ -1226,10 +1210,9 @@ lpfc_sli_handle_slow_ring_event(struct lpfc_hba * phba, spin_lock_irqsave( phba->host->host_lock, iflag); - } else { - list_add_tail(&cmdiocbp->list, - lpfc_iocb_list); - } + } else + lpfc_sli_release_iocbq(phba, + cmdiocbp); } } else if (type == LPFC_UNKNOWN_IOCB) { if (irsp->ulpCommand == CMD_ADAPTER_MSG) { @@ -1264,12 +1247,12 @@ lpfc_sli_handle_slow_ring_event(struct lpfc_hba * phba, next_iocb, &saveq->list, list) { - list_add_tail(&rspiocbp->list, - lpfc_iocb_list); + lpfc_sli_release_iocbq(phba, + rspiocbp); } } - list_add_tail(&saveq->list, lpfc_iocb_list); + lpfc_sli_release_iocbq(phba, saveq); } } @@ -1314,7 +1297,6 @@ lpfc_sli_abort_iocb_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) struct lpfc_iocbq *iocb, *next_iocb; IOCB_t *icmd = NULL, *cmd = NULL; int errcnt; - uint16_t iotag; errcnt = 0; @@ -1331,9 +1313,8 @@ lpfc_sli_abort_iocb_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) spin_unlock_irq(phba->host->host_lock); (iocb->iocb_cmpl) (phba, iocb, iocb); spin_lock_irq(phba->host->host_lock); - } else { - list_add_tail(&iocb->list, &phba->lpfc_iocb_list); - } + } else + lpfc_sli_release_iocbq(phba, iocb); } pring->txq_cnt = 0; INIT_LIST_HEAD(&(pring->txq)); @@ -1343,13 +1324,8 @@ lpfc_sli_abort_iocb_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) cmd = &iocb->iocb; /* - * Imediate abort of IOCB, clear fast_lookup entry, - * if any, deque and call compl + * Imediate abort of IOCB, deque and call compl */ - iotag = cmd->ulpIoTag; - if (iotag && pring->fast_lookup && - (iotag < pring->fast_iotag)) - pring->fast_lookup[iotag] = NULL; list_del_init(&iocb->list); pring->txcmplq_cnt--; @@ -1360,9 +1336,8 @@ lpfc_sli_abort_iocb_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) spin_unlock_irq(phba->host->host_lock); (iocb->iocb_cmpl) (phba, iocb, iocb); spin_lock_irq(phba->host->host_lock); - } else { - list_add_tail(&iocb->list, &phba->lpfc_iocb_list); - } + } else + lpfc_sli_release_iocbq(phba, iocb); } INIT_LIST_HEAD(&pring->txcmplq); @@ -2147,6 +2122,10 @@ lpfc_sli_setup(struct lpfc_hba *phba) psli->next_ring = LPFC_FCP_NEXT_RING; psli->ip_ring = LPFC_IP_RING; + psli->iocbq_lookup = NULL; + psli->iocbq_lookup_len = 0; + psli->last_iotag = 0; + for (i = 0; i < psli->num_rings; i++) { pring = &psli->ring[i]; switch (i) { @@ -2222,7 +2201,7 @@ lpfc_sli_queue_setup(struct lpfc_hba * phba) { struct lpfc_sli *psli; struct lpfc_sli_ring *pring; - int i, cnt; + int i; psli = &phba->sli; spin_lock_irq(phba->host->host_lock); @@ -2238,19 +2217,6 @@ lpfc_sli_queue_setup(struct lpfc_hba * phba) INIT_LIST_HEAD(&pring->txcmplq); INIT_LIST_HEAD(&pring->iocb_continueq); INIT_LIST_HEAD(&pring->postbufq); - cnt = pring->fast_iotag; - spin_unlock_irq(phba->host->host_lock); - if (cnt) { - pring->fast_lookup = - kmalloc(cnt * sizeof (struct lpfc_iocbq *), - GFP_KERNEL); - if (pring->fast_lookup == 0) { - return (0); - } - memset((char *)pring->fast_lookup, 0, - cnt * sizeof (struct lpfc_iocbq *)); - } - spin_lock_irq(phba->host->host_lock); } spin_unlock_irq(phba->host->host_lock); return (1); @@ -2292,10 +2258,8 @@ lpfc_sli_hba_down(struct lpfc_hba * phba) flags); (iocb->iocb_cmpl) (phba, iocb, iocb); spin_lock_irqsave(phba->host->host_lock, flags); - } else { - list_add_tail(&iocb->list, - &phba->lpfc_iocb_list); - } + } else + lpfc_sli_release_iocbq(phba, iocb); } INIT_LIST_HEAD(&(pring->txq)); @@ -2436,7 +2400,7 @@ lpfc_sli_abort_elsreq_cmpl(struct lpfc_hba * phba, struct lpfc_iocbq * cmdiocb, kfree(buf_ptr); } - list_add_tail(&cmdiocb->list, &phba->lpfc_iocb_list); + lpfc_sli_release_iocbq(phba, cmdiocb); return; } @@ -2454,7 +2418,6 @@ lpfc_sli_issue_abort_iotag32(struct lpfc_hba * phba, list_remove_head(lpfc_iocb_list, abtsiocbp, struct lpfc_iocbq, list); if (abtsiocbp == NULL) return 0; - memset(abtsiocbp, 0, sizeof (struct lpfc_iocbq)); iabt = &abtsiocbp->iocb; icmd = &cmdiocb->iocb; @@ -2473,7 +2436,7 @@ lpfc_sli_issue_abort_iotag32(struct lpfc_hba * phba, abtsiocbp->iocb_cmpl = lpfc_sli_abort_elsreq_cmpl; break; default: - list_add_tail(&abtsiocbp->list, lpfc_iocb_list); + lpfc_sli_release_iocbq(phba, abtsiocbp); return 0; } @@ -2485,7 +2448,7 @@ lpfc_sli_issue_abort_iotag32(struct lpfc_hba * phba, iabt->ulpCommand = CMD_ABORT_MXRI64_CN; if (lpfc_sli_issue_iocb(phba, pring, abtsiocbp, 0) == IOCB_ERROR) { - list_add_tail(&abtsiocbp->list, lpfc_iocb_list); + lpfc_sli_release_iocbq(phba, abtsiocbp); return 0; } @@ -2563,7 +2526,7 @@ lpfc_sli_abort_fcp_cmpl(struct lpfc_hba * phba, struct lpfc_iocbq * cmdiocb, struct lpfc_iocbq * rspiocb) { spin_lock_irq(phba->host->host_lock); - list_add_tail(&cmdiocb->list, &phba->lpfc_iocb_list); + lpfc_sli_release_iocbq(phba, cmdiocb); spin_unlock_irq(phba->host->host_lock); return; } @@ -2604,7 +2567,6 @@ lpfc_sli_abort_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, errcnt++; continue; } - memset(abtsiocb, 0, sizeof (struct lpfc_iocbq)); abtsiocb->iocb.un.acxri.abortType = ABORT_TYPE_ABTS; abtsiocb->iocb.un.acxri.abortContextTag = cmd->ulpContext; @@ -2621,7 +2583,7 @@ lpfc_sli_abort_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; ret_val = lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0); if (ret_val == IOCB_ERROR) { - list_add_tail(&abtsiocb->list, lpfc_iocb_list); + lpfc_sli_release_iocbq(phba, abtsiocb); errcnt++; continue; } @@ -2635,8 +2597,9 @@ lpfc_sli_wake_iocb_high_priority(struct lpfc_hba * phba, struct lpfc_iocbq * queue1, struct lpfc_iocbq * queue2) { - if (queue1->context2 && queue2) - memcpy(queue1->context2, queue2, sizeof (struct lpfc_iocbq)); + struct lpfc_iocbq *save_iocbq = queue1->context2; + if (save_iocbq && queue2) + memcpy(&save_iocbq->iocb, &queue2->iocb, sizeof(queue2->iocb)); /* The waiter is looking for LPFC_IO_HIPRI bit to be set as a signal to wake up */ -- cgit v1.2.3