/******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2004-2008 Emulex. All rights reserved. * * EMULEX and SLI are trademarks of Emulex. * * www.emulex.com * * Portions Copyright (C) 2004-2005 Christoph Hellwig * * * * This program is free software; you can redistribute it and/or * * modify it under the terms of version 2 of the GNU General * * Public License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful. * * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * * TO BE LEGALLY INVALID. See the GNU General Public License for * * more details, a copy of which can be found in the file COPYING * * included with this package. * *******************************************************************/ #include #include #include #include #include #include #include #include #include #include "lpfc_hw.h" #include "lpfc_sli.h" #include "lpfc_nl.h" #include "lpfc_disc.h" #include "lpfc_scsi.h" #include "lpfc.h" #include "lpfc_crtn.h" #include "lpfc_logmsg.h" #include "lpfc_compat.h" #include "lpfc_debugfs.h" /* * Define macro to log: Mailbox command x%x cannot issue Data * This allows multiple uses of lpfc_msgBlk0311 * w/o perturbing log msg utility. */ #define LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag) \ lpfc_printf_log(phba, \ KERN_INFO, \ LOG_MBOX | LOG_SLI, \ "(%d):0311 Mailbox command x%x cannot " \ "issue Data: x%x x%x x%x\n", \ pmbox->vport ? pmbox->vport->vpi : 0, \ pmbox->mb.mbxCommand, \ phba->pport->port_state, \ psli->sli_flag, \ flag) /* There are only four IOCB completion types. */ typedef enum _lpfc_iocb_type { LPFC_UNKNOWN_IOCB, LPFC_UNSOL_IOCB, LPFC_SOL_IOCB, LPFC_ABORT_IOCB } lpfc_iocb_type; /** * lpfc_cmd_iocb: Get next command iocb entry in the ring. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * * This function returns pointer to next command iocb entry * in the command ring. The caller must hold hbalock to prevent * other threads consume the next command iocb. * SLI-2/SLI-3 provide different sized iocbs. **/ static inline IOCB_t * lpfc_cmd_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) { return (IOCB_t *) (((char *) pring->cmdringaddr) + pring->cmdidx * phba->iocb_cmd_size); } /** * lpfc_resp_iocb: Get next response iocb entry in the ring. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * * This function returns pointer to next response iocb entry * in the response ring. The caller must hold hbalock to make sure * that no other thread consume the next response iocb. * SLI-2/SLI-3 provide different sized iocbs. **/ static inline IOCB_t * lpfc_resp_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) { return (IOCB_t *) (((char *) pring->rspringaddr) + pring->rspidx * phba->iocb_rsp_size); } /** * __lpfc_sli_get_iocbq: Allocates an iocb object from iocb pool. * @phba: Pointer to HBA context object. * * This function is called with hbalock held. This function * allocates a new driver iocb object from the iocb pool. If the * allocation is successful, it returns pointer to the newly * allocated iocb object else it returns NULL. **/ static struct lpfc_iocbq * __lpfc_sli_get_iocbq(struct lpfc_hba *phba) { struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list; struct lpfc_iocbq * iocbq = NULL; list_remove_head(lpfc_iocb_list, iocbq, struct lpfc_iocbq, list); return iocbq; } /** * lpfc_sli_get_iocbq: Allocates an iocb object from iocb pool. * @phba: Pointer to HBA context object. * * This function is called with no lock held. This function * allocates a new driver iocb object from the iocb pool. If the * allocation is successful, it returns pointer to the newly * allocated iocb object else it returns NULL. **/ struct lpfc_iocbq * lpfc_sli_get_iocbq(struct lpfc_hba *phba) { struct lpfc_iocbq * iocbq = NULL; unsigned long iflags; spin_lock_irqsave(&phba->hbalock, iflags); iocbq = __lpfc_sli_get_iocbq(phba); spin_unlock_irqrestore(&phba->hbalock, iflags); return iocbq; } /** * __lpfc_sli_release_iocbq: Release iocb to the iocb pool. * @phba: Pointer to HBA context object. * @iocbq: Pointer to driver iocb object. * * This function is called with hbalock held to release driver * iocb object to the iocb pool. The iotag in the iocb object * does not change for each use of the iocb object. This function * clears all other fields of the iocb object when it is freed. **/ static void __lpfc_sli_release_iocbq(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq) { size_t start_clean = offsetof(struct lpfc_iocbq, 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); } /** * lpfc_sli_release_iocbq: Release iocb to the iocb pool. * @phba: Pointer to HBA context object. * @iocbq: Pointer to driver iocb object. * * This function is called with no lock held to release the iocb to * iocb pool. **/ void lpfc_sli_release_iocbq(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq) { unsigned long iflags; /* * Clean all volatile data fields, preserve iotag and node struct. */ spin_lock_irqsave(&phba->hbalock, iflags); __lpfc_sli_release_iocbq(phba, iocbq); spin_unlock_irqrestore(&phba->hbalock, iflags); } /** * lpfc_sli_iocb_cmd_type: Get the iocb type. * @iocb_cmnd : iocb command code. * * This function is called by ring event handler function to get the iocb type. * This function translates the iocb command to an iocb command type used to * decide the final disposition of each completed IOCB. * The function returns * LPFC_UNKNOWN_IOCB if it is an unsupported iocb * LPFC_SOL_IOCB if it is a solicited iocb completion * LPFC_ABORT_IOCB if it is an abort iocb * LPFC_UNSOL_IOCB if it is an unsolicited iocb * * The caller is not required to hold any lock. **/ static lpfc_iocb_type lpfc_sli_iocb_cmd_type(uint8_t iocb_cmnd) { lpfc_iocb_type type = LPFC_UNKNOWN_IOCB; if (iocb_cmnd > CMD_MAX_IOCB_CMD) return 0; switch (iocb_cmnd) { case CMD_XMIT_SEQUENCE_CR: case CMD_XMIT_SEQUENCE_CX: case CMD_XMIT_BCAST_CN: case CMD_XMIT_BCAST_CX: case CMD_ELS_REQUEST_CR: case CMD_ELS_REQUEST_CX: case CMD_CREATE_XRI_CR: case CMD_CREATE_XRI_CX: case CMD_GET_RPI_CN: case CMD_XMIT_ELS_RSP_CX: case CMD_GET_RPI_CR: case CMD_FCP_IWRITE_CR: case CMD_FCP_IWRITE_CX: case CMD_FCP_IREAD_CR: case CMD_FCP_IREAD_CX: case CMD_FCP_ICMND_CR: case CMD_FCP_ICMND_CX: case CMD_FCP_TSEND_CX: case CMD_FCP_TRSP_CX: case CMD_FCP_TRECEIVE_CX: case CMD_FCP_AUTO_TRSP_CX: case CMD_ADAPTER_MSG: case CMD_ADAPTER_DUMP: case CMD_XMIT_SEQUENCE64_CR: case CMD_XMIT_SEQUENCE64_CX: case CMD_XMIT_BCAST64_CN: case CMD_XMIT_BCAST64_CX: case CMD_ELS_REQUEST64_CR: case CMD_ELS_REQUEST64_CX: case CMD_FCP_IWRITE64_CR: case CMD_FCP_IWRITE64_CX: case CMD_FCP_IREAD64_CR: case CMD_FCP_IREAD64_CX: case CMD_FCP_ICMND64_CR: case CMD_FCP_ICMND64_CX: case CMD_FCP_TSEND64_CX: case CMD_FCP_TRSP64_CX: case CMD_FCP_TRECEIVE64_CX: case CMD_GEN_REQUEST64_CR: case CMD_GEN_REQUEST64_CX: case CMD_XMIT_ELS_RSP64_CX: type = LPFC_SOL_IOCB; break; case CMD_ABORT_XRI_CN: case CMD_ABORT_XRI_CX: case CMD_CLOSE_XRI_CN: case CMD_CLOSE_XRI_CX: case CMD_XRI_ABORTED_CX: case CMD_ABORT_MXRI64_CN: type = LPFC_ABORT_IOCB; break; case CMD_RCV_SEQUENCE_CX: case CMD_RCV_ELS_REQ_CX: case CMD_RCV_SEQUENCE64_CX: case CMD_RCV_ELS_REQ64_CX: case CMD_ASYNC_STATUS: case CMD_IOCB_RCV_SEQ64_CX: case CMD_IOCB_RCV_ELS64_CX: case CMD_IOCB_RCV_CONT64_CX: case CMD_IOCB_RET_XRI64_CX: type = LPFC_UNSOL_IOCB; break; case CMD_IOCB_XMIT_MSEQ64_CR: case CMD_IOCB_XMIT_MSEQ64_CX: case CMD_IOCB_RCV_SEQ_LIST64_CX: case CMD_IOCB_RCV_ELS_LIST64_CX: case CMD_IOCB_CLOSE_EXTENDED_CN: case CMD_IOCB_ABORT_EXTENDED_CN: case CMD_IOCB_RET_HBQE64_CN: case CMD_IOCB_FCP_IBIDIR64_CR: case CMD_IOCB_FCP_IBIDIR64_CX: case CMD_IOCB_FCP_ITASKMGT64_CX: case CMD_IOCB_LOGENTRY_CN: case CMD_IOCB_LOGENTRY_ASYNC_CN: printk("%s - Unhandled SLI-3 Command x%x\n", __func__, iocb_cmnd); type = LPFC_UNKNOWN_IOCB; break; default: type = LPFC_UNKNOWN_IOCB; break; } return type; } /** * lpfc_sli_ring_map: Issue config_ring mbox for all rings. * @phba: Pointer to HBA context object. * * This function is called from SLI initialization code * to configure every ring of the HBA's SLI interface. The * caller is not required to hold any lock. This function issues * a config_ring mailbox command for each ring. * This function returns zero if successful else returns a negative * error code. **/ static int lpfc_sli_ring_map(struct lpfc_hba *phba) { struct lpfc_sli *psli = &phba->sli; LPFC_MBOXQ_t *pmb; MAILBOX_t *pmbox; int i, rc, ret = 0; pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL); if (!pmb) return -ENOMEM; pmbox = &pmb->mb; phba->link_state = LPFC_INIT_MBX_CMDS; for (i = 0; i < psli->num_rings; i++) { lpfc_config_ring(phba, i, pmb); rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL); if (rc != MBX_SUCCESS) { lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "0446 Adapter failed to init (%d), " "mbxCmd x%x CFG_RING, mbxStatus x%x, " "ring %d\n", rc, pmbox->mbxCommand, pmbox->mbxStatus, i); phba->link_state = LPFC_HBA_ERROR; ret = -ENXIO; break; } } mempool_free(pmb, phba->mbox_mem_pool); return ret; } /** * lpfc_sli_ringtxcmpl_put: Adds new iocb to the txcmplq. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @piocb: Pointer to the driver iocb object. * * This function is called with hbalock held. The function adds the * new iocb to txcmplq of the given ring. This function always returns * 0. If this function is called for ELS ring, this function checks if * there is a vport associated with the ELS command. This function also * starts els_tmofunc timer if this is an ELS command. **/ static int lpfc_sli_ringtxcmpl_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *piocb) { list_add_tail(&piocb->list, &pring->txcmplq); pring->txcmplq_cnt++; if ((unlikely(pring->ringno == LPFC_ELS_RING)) && (piocb->iocb.ulpCommand != CMD_ABORT_XRI_CN) && (piocb->iocb.ulpCommand != CMD_CLOSE_XRI_CN)) { if (!piocb->vport) BUG(); else mod_timer(&piocb->vport->els_tmofunc, jiffies + HZ * (phba->fc_ratov << 1)); } return 0; } /** * lpfc_sli_ringtx_get: Get first element of the txq. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * * This function is called with hbalock held to get next * iocb in txq of the given ring. If there is any iocb in * the txq, the function returns first iocb in the list after * removing the iocb from the list, else it returns NULL. **/ static struct lpfc_iocbq * lpfc_sli_ringtx_get(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) { struct lpfc_iocbq *cmd_iocb; list_remove_head((&pring->txq), cmd_iocb, struct lpfc_iocbq, list); if (cmd_iocb != NULL) pring->txq_cnt--; return cmd_iocb; } /** * lpfc_sli_next_iocb_slot: Get next iocb slot in the ring. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * * This function is called with hbalock held and the caller must post the * iocb without releasing the lock. If the caller releases the lock, * iocb slot returned by the function is not guaranteed to be available. * The function returns pointer to the next available iocb slot if there * is available slot in the ring, else it returns NULL. * If the get index of the ring is ahead of the put index, the function * will post an error attention event to the worker thread to take the * HBA to offline state. **/ static IOCB_t * lpfc_sli_next_iocb_slot (struct lpfc_hba *phba, struct lpfc_sli_ring *pring) { struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno]; uint32_t max_cmd_idx = pring->numCiocb; if ((pring->next_cmdidx == pring->cmdidx) && (++pring->next_cmdidx >= max_cmd_idx)) pring->next_cmdidx = 0; if (unlikely(pring->local_getidx == pring->next_cmdidx)) { pring->local_getidx = le32_to_cpu(pgp->cmdGetInx); if (unlikely(pring->local_getidx >= max_cmd_idx)) { lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0315 Ring %d issue: portCmdGet %d " "is bigger then cmd ring %d\n", pring->ringno, pring->local_getidx, max_cmd_idx); phba->link_state = LPFC_HBA_ERROR; /* * All error attention handlers are posted to * worker thread */ phba->work_ha |= HA_ERATT; phba->work_hs = HS_FFER3; lpfc_worker_wake_up(phba); return NULL; } if (pring->local_getidx == pring->next_cmdidx) return NULL; } return lpfc_cmd_iocb(phba, pring); } /** * lpfc_sli_next_iotag: Get an iotag for the iocb. * @phba: Pointer to HBA context object. * @iocbq: Pointer to driver iocb object. * * This function gets an iotag for the iocb. If there is no unused iotag and * the iocbq_lookup_len < 0xffff, this function allocates a bigger iotag_lookup * array and assigns a new iotag. * The function returns the allocated iotag if successful, else returns zero. * Zero is not a valid iotag. * The caller is not required to hold any lock. **/ uint16_t lpfc_sli_next_iotag(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq) { struct lpfc_iocbq **new_arr; struct lpfc_iocbq **old_arr; size_t new_len; struct lpfc_sli *psli = &phba->sli; uint16_t iotag; spin_lock_irq(&phba->hbalock); iotag = psli->last_iotag; if(++iotag < psli->iocbq_lookup_len) { psli->last_iotag = iotag; psli->iocbq_lookup[iotag] = iocbq; spin_unlock_irq(&phba->hbalock); 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->hbalock); new_arr = kzalloc(new_len * sizeof (struct lpfc_iocbq *), GFP_KERNEL); if (new_arr) { spin_lock_irq(&phba->hbalock); 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->hbalock); iocbq->iotag = iotag; return iotag; } spin_unlock_irq(&phba->hbalock); 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->hbalock); iocbq->iotag = iotag; kfree(old_arr); return iotag; } } else spin_unlock_irq(&phba->hbalock); lpfc_printf_log(phba, KERN_ERR,LOG_SLI, "0318 Failed to allocate IOTAG.last IOTAG is %d\n", psli->last_iotag); return 0; } /** * lpfc_sli_submit_iocb: Submit an iocb to the firmware. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @iocb: Pointer to iocb slot in the ring. * @nextiocb: Pointer to driver iocb object which need to be * posted to firmware. * * This function is called with hbalock held to post a new iocb to * the firmware. This function copies the new iocb to ring iocb slot and * updates the ring pointers. It adds the new iocb to txcmplq if there is * a completion call back for this iocb else the function will free the * iocb object. **/ static void lpfc_sli_submit_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, IOCB_t *iocb, struct lpfc_iocbq *nextiocb) { /* * Set up an iotag */ nextiocb->iocb.ulpIoTag = (nextiocb->iocb_cmpl) ? nextiocb->iotag : 0; if (pring->ringno == LPFC_ELS_RING) { lpfc_debugfs_slow_ring_trc(phba, "IOCB cmd ring: wd4:x%08x wd6:x%08x wd7:x%08x", *(((uint32_t *) &nextiocb->iocb) + 4), *(((uint32_t *) &nextiocb->iocb) + 6), *(((uint32_t *) &nextiocb->iocb) + 7)); } /* * Issue iocb command to adapter */ lpfc_sli_pcimem_bcopy(&nextiocb->iocb, iocb, phba->iocb_cmd_size); wmb(); pring->stats.iocb_cmd++; /* * If there is no completion routine to call, we can release the * IOCB buffer back right now. For IOCBs, like QUE_RING_BUF, * that have no rsp ring completion, iocb_cmpl MUST be NULL. */ if (nextiocb->iocb_cmpl) lpfc_sli_ringtxcmpl_put(phba, pring, nextiocb); else __lpfc_sli_release_iocbq(phba, nextiocb); /* * Let the HBA know what IOCB slot will be the next one the * driver will put a command into. */ pring->cmdidx = pring->next_cmdidx; writel(pring->cmdidx, &phba->host_gp[pring->ringno].cmdPutInx); } /** * lpfc_sli_update_full_ring: Update the chip attention register. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * * The caller is not required to hold any lock for calling this function. * This function updates the chip attention bits for the ring to inform firmware * that there are pending work to be done for this ring and requests an * interrupt when there is space available in the ring. This function is * called when the driver is unable to post more iocbs to the ring due * to unavailability of space in the ring. **/ static void lpfc_sli_update_full_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) { int ringno = pring->ringno; pring->flag |= LPFC_CALL_RING_AVAILABLE; wmb(); /* * Set ring 'ringno' to SET R0CE_REQ in Chip Att register. * The HBA will tell us when an IOCB entry is available. */ writel((CA_R0ATT|CA_R0CE_REQ) << (ringno*4), phba->CAregaddr); readl(phba->CAregaddr); /* flush */ pring->stats.iocb_cmd_full++; } /** * lpfc_sli_update_ring: Update chip attention register. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * * This function updates the chip attention register bit for the * given ring to inform HBA that there is more work to be done * in this ring. The caller is not required to hold any lock. **/ static void lpfc_sli_update_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) { int ringno = pring->ringno; /* * Tell the HBA that there is work to do in this ring. */ if (!(phba->sli3_options & LPFC_SLI3_CRP_ENABLED)) { wmb(); writel(CA_R0ATT << (ringno * 4), phba->CAregaddr); readl(phba->CAregaddr); /* flush */ } } /** * lpfc_sli_resume_iocb: Process iocbs in the txq. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * * This function is called with hbalock held to post pending iocbs * in the txq to the firmware. This function is called when driver * detects space available in the ring. **/ static void lpfc_sli_resume_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) { IOCB_t *iocb; struct lpfc_iocbq *nextiocb; /* * Check to see if: * (a) there is anything on the txq to send * (b) link is up * (c) link attention events can be processed (fcp ring only) * (d) IOCB processing is not blocked by the outstanding mbox command. */ if (pring->txq_cnt && lpfc_is_link_up(phba) && (pring->ringno != phba->sli.fcp_ring || phba->sli.sli_flag & LPFC_PROCESS_LA)) { while ((iocb = lpfc_sli_next_iocb_slot(phba, pring)) && (nextiocb = lpfc_sli_ringtx_get(phba, pring))) lpfc_sli_submit_iocb(phba, pring, iocb, nextiocb); if (iocb) lpfc_sli_update_ring(phba, pring); else lpfc_sli_update_full_ring(phba, pring); } return; } /** * lpfc_sli_next_hbq_slot: Get next hbq entry for the HBQ. * @phba: Pointer to HBA context object. * @hbqno: HBQ number. * * This function is called with hbalock held to get the next * available slot for the given HBQ. If there is free slot * available for the HBQ it will return pointer to the next available * HBQ entry else it will return NULL. **/ static struct lpfc_hbq_entry * lpfc_sli_next_hbq_slot(struct lpfc_hba *phba, uint32_t hbqno) { struct hbq_s *hbqp = &phba->hbqs[hbqno]; if (hbqp->next_hbqPutIdx == hbqp->hbqPutIdx && ++hbqp->next_hbqPutIdx >= hbqp->entry_count) hbqp->next_hbqPutIdx = 0; if (unlikely(hbqp->local_hbqGetIdx == hbqp->next_hbqPutIdx)) { uint32_t raw_index = phba->hbq_get[hbqno]; uint32_t getidx = le32_to_cpu(raw_index); hbqp->local_hbqGetIdx = getidx; if (unlikely(hbqp->local_hbqGetIdx >= hbqp->entry_count)) { lpfc_printf_log(phba, KERN_ERR, LOG_SLI | LOG_VPORT, "1802 HBQ %d: local_hbqGetIdx " "%u is > than hbqp->entry_count %u\n", hbqno, hbqp->local_hbqGetIdx, hbqp->entry_count); phba->link_state = LPFC_HBA_ERROR; return NULL; } if (hbqp->local_hbqGetIdx == hbqp->next_hbqPutIdx) return NULL; } return (struct lpfc_hbq_entry *) phba->hbqs[hbqno].hbq_virt + hbqp->hbqPutIdx; } /** * lpfc_sli_hbqbuf_free_all: Free all the hbq buffers. * @phba: Pointer to HBA context object. * * This function is called with no lock held to free all the * hbq buffers while uninitializing the SLI interface. It also * frees the HBQ buffers returned by the firmware but not yet * processed by the upper layers. **/ void lpfc_sli_hbqbuf_free_all(struct lpfc_hba *phba) { struct lpfc_dmabuf *dmabuf, *next_dmabuf; struct hbq_dmabuf *hbq_buf; unsigned long flags; int i, hbq_count; uint32_t hbqno; hbq_count = lpfc_sli_hbq_count(); /* Return all memory used by all HBQs */ spin_lock_irqsave(&phba->hbalock, flags); for (i = 0; i < hbq_count; ++i) { list_for_each_entry_safe(dmabuf, next_dmabuf, &phba->hbqs[i].hbq_buffer_list, list) { hbq_buf = container_of(dmabuf, struct hbq_dmabuf, dbuf); list_del(&hbq_buf->dbuf.list); (phba->hbqs[i].hbq_free_buffer)(phba, hbq_buf); } phba->hbqs[i].buffer_count = 0; } /* Return all HBQ buffer that are in-fly */ list_for_each_entry_safe(dmabuf, next_dmabuf, &phba->hbqbuf_in_list, list) { hbq_buf = container_of(dmabuf, struct hbq_dmabuf, dbuf); list_del(&hbq_buf->dbuf.list); if (hbq_buf->tag == -1) { (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer) (phba, hbq_buf); } else { hbqno = hbq_buf->tag >> 16; if (hbqno >= LPFC_MAX_HBQS) (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer) (phba, hbq_buf); else (phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buf); } } /* Mark the HBQs not in use */ phba->hbq_in_use = 0; spin_unlock_irqrestore(&phba->hbalock, flags); } /** * lpfc_sli_hbq_to_firmware: Post the hbq buffer to firmware. * @phba: Pointer to HBA context object. * @hbqno: HBQ number. * @hbq_buf: Pointer to HBQ buffer. * * This function is called with the hbalock held to post a * hbq buffer to the firmware. If the function finds an empty * slot in the HBQ, it will post the buffer. The function will return * pointer to the hbq entry if it successfully post the buffer * else it will return NULL. **/ static struct lpfc_hbq_entry * lpfc_sli_hbq_to_firmware(struct lpfc_hba *phba, uint32_t hbqno, struct hbq_dmabuf *hbq_buf) { struct lpfc_hbq_entry *hbqe; dma_addr_t physaddr = hbq_buf->dbuf.phys; /* Get next HBQ entry slot to use */ hbqe = lpfc_sli_next_hbq_slot(phba, hbqno); if (hbqe) { struct hbq_s *hbqp = &phba->hbqs[hbqno]; hbqe->bde.addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); hbqe->bde.addrLow = le32_to_cpu(putPaddrLow(physaddr)); hbqe->bde.tus.f.bdeSize = hbq_buf->size; hbqe->bde.tus.f.bdeFlags = 0; hbqe->bde.tus.w = le32_to_cpu(hbqe->bde.tus.w); hbqe->buffer_tag = le32_to_cpu(hbq_buf->tag); /* Sync SLIM */ hbqp->hbqPutIdx = hbqp->next_hbqPutIdx; writel(hbqp->hbqPutIdx, phba->hbq_put + hbqno); /* flush */ readl(phba->hbq_put + hbqno); list_add_tail(&hbq_buf->dbuf.list, &hbqp->hbq_buffer_list); } return hbqe; } /* HBQ for ELS and CT traffic. */ static struct lpfc_hbq_init lpfc_els_hbq = { .rn = 1, .entry_count = 200, .mask_count = 0, .profile = 0, .ring_mask = (1 << LPFC_ELS_RING), .buffer_count = 0, .init_count = 20, .add_count = 5, }; /* HBQ for the extra ring if needed */ static struct lpfc_hbq_init lpfc_extra_hbq = { .rn = 1, .entry_count = 200, .mask_count = 0, .profile = 0, .ring_mask = (1 << LPFC_EXTRA_RING), .buffer_count = 0, .init_count = 0, .add_count = 5, }; /* Array of HBQs */ struct lpfc_hbq_init *lpfc_hbq_defs[] = { &lpfc_els_hbq, &lpfc_extra_hbq, }; /** * lpfc_sli_hbqbuf_fill_hbqs: Post more hbq buffers to HBQ. * @phba: Pointer to HBA context object. * @hbqno: HBQ number. * @count: Number of HBQ buffers to be posted. * * This function is called with no lock held to post more hbq buffers to the * given HBQ. The function returns the number of HBQ buffers successfully * posted. **/ static int lpfc_sli_hbqbuf_fill_hbqs(struct lpfc_hba *phba, uint32_t hbqno, uint32_t count) { uint32_t i, posted = 0; unsigned long flags; struct hbq_dmabuf *hbq_buffer; LIST_HEAD(hbq_buf_list); if (!phba->hbqs[hbqno].hbq_alloc_buffer) return 0; if ((phba->hbqs[hbqno].buffer_count + count) > lpfc_hbq_defs[hbqno]->entry_count) count = lpfc_hbq_defs[hbqno]->entry_count - phba->hbqs[hbqno].buffer_count; if (!count) return 0; /* Allocate HBQ entries */ for (i = 0; i < count; i++) { hbq_buffer = (phba->hbqs[hbqno].hbq_alloc_buffer)(phba); if (!hbq_buffer) break; list_add_tail(&hbq_buffer->dbuf.list, &hbq_buf_list); } /* Check whether HBQ is still in use */ spin_lock_irqsave(&phba->hbalock, flags); if (!phba->hbq_in_use) goto err; while (!list_empty(&hbq_buf_list)) { list_remove_head(&hbq_buf_list, hbq_buffer, struct hbq_dmabuf, dbuf.list); hbq_buffer->tag = (phba->hbqs[hbqno].buffer_count | (hbqno << 16)); if (lpfc_sli_hbq_to_firmware(phba, hbqno, hbq_buffer)) { phba->hbqs[hbqno].buffer_count++; posted++; } else (phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer); } spin_unlock_irqrestore(&phba->hbalock, flags); return posted; err: spin_unlock_irqrestore(&phba->hbalock, flags); while (!list_empty(&hbq_buf_list)) { list_remove_head(&hbq_buf_list, hbq_buffer, struct hbq_dmabuf, dbuf.list); (phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer); } return 0; } /** * lpfc_sli_hbqbuf_add_hbqs: Post more HBQ buffers to firmware. * @phba: Pointer to HBA context object. * @qno: HBQ number. * * This function posts more buffers to the HBQ. This function * is called with no lock held. The function returns the number of HBQ entries * successfully allocated. **/ int lpfc_sli_hbqbuf_add_hbqs(struct lpfc_hba *phba, uint32_t qno) { return(lpfc_sli_hbqbuf_fill_hbqs(phba, qno, lpfc_hbq_defs[qno]->add_count)); } /** * lpfc_sli_hbqbuf_init_hbqs: Post initial buffers to the HBQ. * @phba: Pointer to HBA context object. * @qno: HBQ queue number. * * This function is called from SLI initialization code path with * no lock held to post initial HBQ buffers to firmware. The * function returns the number of HBQ entries successfully allocated. **/ static int lpfc_sli_hbqbuf_init_hbqs(struct lpfc_hba *phba, uint32_t qno) { return(lpfc_sli_hbqbuf_fill_hbqs(phba, qno, lpfc_hbq_defs[qno]->init_count)); } /** * lpfc_sli_hbqbuf_find: Find the hbq buffer associated with a tag. * @phba: Pointer to HBA context object. * @tag: Tag of the hbq buffer. * * This function is called with hbalock held. This function searches * for the hbq buffer associated with the given tag in the hbq buffer * list. If it finds the hbq buffer, it returns the hbq_buffer other wise * it returns NULL. **/ static struct hbq_dmabuf * lpfc_sli_hbqbuf_find(struct lpfc_hba *phba, uint32_t tag) { struct lpfc_dmabuf *d_buf; struct hbq_dmabuf *hbq_buf; uint32_t hbqno; hbqno = tag >> 16; if (hbqno >= LPFC_MAX_HBQS) return NULL; list_for_each_entry(d_buf, &phba->hbqs[hbqno].hbq_buffer_list, list) { hbq_buf = container_of(d_buf, struct hbq_dmabuf, dbuf); if (hbq_buf->tag == tag) { return hbq_buf; } } lpfc_printf_log(phba, KERN_ERR, LOG_SLI | LOG_VPORT, "1803 Bad hbq tag. Data: x%x x%x\n", tag, phba->hbqs[tag >> 16].buffer_count); return NULL; } /** * lpfc_sli_free_hbq: Give back the hbq buffer to firmware. * @phba: Pointer to HBA context object. * @hbq_buffer: Pointer to HBQ buffer. * * This function is called with hbalock. This function gives back * the hbq buffer to firmware. If the HBQ does not have space to * post the buffer, it will free the buffer. **/ void lpfc_sli_free_hbq(struct lpfc_hba *phba, struct hbq_dmabuf *hbq_buffer) { uint32_t hbqno; if (hbq_buffer) { hbqno = hbq_buffer->tag >> 16; if (!lpfc_sli_hbq_to_firmware(phba, hbqno, hbq_buffer)) { (phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer); } } } /** * lpfc_sli_chk_mbx_command: Check if the mailbox is a legitimate mailbox. * @mbxCommand: mailbox command code. * * This function is called by the mailbox event handler function to verify * that the completed mailbox command is a legitimate mailbox command. If the * completed mailbox is not known to the function, it will return MBX_SHUTDOWN * and the mailbox event handler will take the HBA offline. **/ static int lpfc_sli_chk_mbx_command(uint8_t mbxCommand) { uint8_t ret; switch (mbxCommand) { case MBX_LOAD_SM: case MBX_READ_NV: case MBX_WRITE_NV: case MBX_WRITE_VPARMS: case MBX_RUN_BIU_DIAG: case MBX_INIT_LINK: case MBX_DOWN_LINK: case MBX_CONFIG_LINK: case MBX_CONFIG_RING: case MBX_RESET_RING: case MBX_READ_CONFIG: case MBX_READ_RCONFIG: case MBX_READ_SPARM: case MBX_READ_STATUS: case MBX_READ_RPI: case MBX_READ_XRI: case MBX_READ_REV: case MBX_READ_LNK_STAT: case MBX_REG_LOGIN: case MBX_UNREG_LOGIN: case MBX_READ_LA: case MBX_CLEAR_LA: case MBX_DUMP_MEMORY: case MBX_DUMP_CONTEXT: case MBX_RUN_DIAGS: case MBX_RESTART: case MBX_UPDATE_CFG: case MBX_DOWN_LOAD: case MBX_DEL_LD_ENTRY: case MBX_RUN_PROGRAM: case MBX_SET_MASK: case MBX_SET_VARIABLE: case MBX_UNREG_D_ID: case MBX_KILL_BOARD: case MBX_CONFIG_FARP: case MBX_BEACON: case MBX_LOAD_AREA: case MBX_RUN_BIU_DIAG64: case MBX_CONFIG_PORT: case MBX_READ_SPARM64: case MBX_READ_RPI64: case MBX_REG_LOGIN64: case MBX_READ_LA64: case MBX_WRITE_WWN: case MBX_SET_DEBUG: case MBX_LOAD_EXP_ROM: case MBX_ASYNCEVT_ENABLE: case MBX_REG_VPI: case MBX_UNREG_VPI: case MBX_HEARTBEAT: case MBX_PORT_CAPABILITIES: case MBX_PORT_IOV_CONTROL: ret = mbxCommand; break; default: ret = MBX_SHUTDOWN; break; } return ret; } /** * lpfc_sli_wake_mbox_wait: Completion handler for mbox issued from * lpfc_sli_issue_mbox_wait. * @phba: Pointer to HBA context object. * @pmboxq: Pointer to mailbox command. * * This is completion handler function for mailbox commands issued from * lpfc_sli_issue_mbox_wait function. This function is called by the * mailbox event handler function with no lock held. This function * will wake up thread waiting on the wait queue pointed by context1 * of the mailbox. **/ static void lpfc_sli_wake_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq) { wait_queue_head_t *pdone_q; unsigned long drvr_flag; /* * If pdone_q is empty, the driver thread gave up waiting and * continued running. */ pmboxq->mbox_flag |= LPFC_MBX_WAKE; spin_lock_irqsave(&phba->hbalock, drvr_flag); pdone_q = (wait_queue_head_t *) pmboxq->context1; if (pdone_q) wake_up_interruptible(pdone_q); spin_unlock_irqrestore(&phba->hbalock, drvr_flag); return; } /** * lpfc_sli_def_mbox_cmpl: Default mailbox completion handler. * @phba: Pointer to HBA context object. * @pmb: Pointer to mailbox object. * * This function is the default mailbox completion handler. It * frees the memory resources associated with the completed mailbox * command. If the completed command is a REG_LOGIN mailbox command, * this function will issue a UREG_LOGIN to re-claim the RPI. **/ void lpfc_sli_def_mbox_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) { struct lpfc_dmabuf *mp; uint16_t rpi; int rc; mp = (struct lpfc_dmabuf *) (pmb->context1); if (mp) { lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); } /* * If a REG_LOGIN succeeded after node is destroyed or node * is in re-discovery driver need to cleanup the RPI. */ if (!(phba->pport->load_flag & FC_UNLOADING) && pmb->mb.mbxCommand == MBX_REG_LOGIN64 && !pmb->mb.mbxStatus) { rpi = pmb->mb.un.varWords[0]; lpfc_unreg_login(phba, pmb->mb.un.varRegLogin.vpi, rpi, pmb); pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl; rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT); if (rc != MBX_NOT_FINISHED) return; } mempool_free(pmb, phba->mbox_mem_pool); return; } /** * lpfc_sli_handle_mb_event: Handle mailbox completions from firmware. * @phba: Pointer to HBA context object. * * This function is called with no lock held. This function processes all * the completed mailbox commands and gives it to upper layers. The interrupt * service routine processes mailbox completion interrupt and adds completed * mailbox commands to the mboxq_cmpl queue and signals the worker thread. * Worker thread call lpfc_sli_handle_mb_event, which will return the * completed mailbox commands in mboxq_cmpl queue to the upper layers. This * function returns the mailbox commands to the upper layer by calling the * completion handler function of each mailbox. **/ int lpfc_sli_handle_mb_event(struct lpfc_hba *phba) { MAILBOX_t *pmbox; LPFC_MBOXQ_t *pmb; int rc; LIST_HEAD(cmplq); phba->sli.slistat.mbox_event++; /* Get all completed mailboxe buffers into the cmplq */ spin_lock_irq(&phba->hbalock); list_splice_init(&phba->sli.mboxq_cmpl, &cmplq); spin_unlock_irq(&phba->hbalock); /* Get a Mailbox buffer to setup mailbox commands for callback */ do { list_remove_head(&cmplq, pmb, LPFC_MBOXQ_t, list); if (pmb == NULL) break; pmbox = &pmb->mb; if (pmbox->mbxCommand != MBX_HEARTBEAT) { if (pmb->vport) { lpfc_debugfs_disc_trc(pmb->vport, LPFC_DISC_TRC_MBOX_VPORT, "MBOX cmpl vport: cmd:x%x mb:x%x x%x", (uint32_t)pmbox->mbxCommand, pmbox->un.varWords[0], pmbox->un.varWords[1]); } else { lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_MBOX, "MBOX cmpl: cmd:x%x mb:x%x x%x", (uint32_t)pmbox->mbxCommand, pmbox->un.varWords[0], pmbox->un.varWords[1]); } } /* * It is a fatal error if unknown mbox command completion. */ if (lpfc_sli_chk_mbx_command(pmbox->mbxCommand) == MBX_SHUTDOWN) { /* Unknow mailbox command compl */ lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI, "(%d):0323 Unknown Mailbox command " "%x Cmpl\n", pmb->vport ? pmb->vport->vpi : 0, pmbox->mbxCommand); phba->link_state = LPFC_HBA_ERROR; phba->work_hs = HS_FFER3; lpfc_handle_eratt(phba); continue; } if (pmbox->mbxStatus) { phba->sli.slistat.mbox_stat_err++; if (pmbox->mbxStatus == MBXERR_NO_RESOURCES) { /* Mbox cmd cmpl error - RETRYing */ lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI, "(%d):0305 Mbox cmd cmpl " "error - RETRYing Data: x%x " "x%x x%x x%x\n", pmb->vport ? pmb->vport->vpi :0, pmbox->mbxCommand, pmbox->mbxStatus, pmbox->un.varWords[0], pmb->vport->port_state); pmbox->mbxStatus = 0; pmbox->mbxOwner = OWN_HOST; spin_lock_irq(&phba->hbalock); phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; spin_unlock_irq(&phba->hbalock); rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT); if (rc == MBX_SUCCESS) continue; } } /* Mailbox cmd Cmpl */ lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI, "(%d):0307 Mailbox cmd x%x Cmpl x%p " "Data: x%x x%x x%x x%x x%x x%x x%x x%x x%x\n", pmb->vport ? pmb->vport->vpi : 0, pmbox->mbxCommand, pmb->mbox_cmpl, *((uint32_t *) pmbox), pmbox->un.varWords[0], pmbox->un.varWords[1], pmbox->un.varWords[2], pmbox->un.varWords[3], pmbox->un.varWords[4], pmbox->un.varWords[5], pmbox->un.varWords[6], pmbox->un.varWords[7]); if (pmb->mbox_cmpl) pmb->mbox_cmpl(phba,pmb); } while (1); return 0; } /** * lpfc_sli_replace_hbqbuff: Replace the HBQ buffer with a new buffer. * @phba: Pointer to HBA context object. * @tag: Tag for the HBQ buffer. * * This function is called from unsolicited event handler code path to get the * HBQ buffer associated with an unsolicited iocb. This function is called with * no lock held. It returns the buffer associated with the given tag and posts * another buffer to the firmware. Note that the new buffer must be allocated * before taking the hbalock and that the hba lock must be held until it is * finished with the hbq entry swap. **/ static struct lpfc_dmabuf * lpfc_sli_replace_hbqbuff(struct lpfc_hba *phba, uint32_t tag) { struct hbq_dmabuf *hbq_entry, *new_hbq_entry; uint32_t hbqno; void *virt; /* virtual address ptr */ dma_addr_t phys; /* mapped address */ unsigned long flags; hbqno = tag >> 16; new_hbq_entry = (phba->hbqs[hbqno].hbq_alloc_buffer)(phba); /* Check whether HBQ is still in use */ spin_lock_irqsave(&phba->hbalock, flags); if (!phba->hbq_in_use) { if (new_hbq_entry) (phba->hbqs[hbqno].hbq_free_buffer)(phba, new_hbq_entry); spin_unlock_irqrestore(&phba->hbalock, flags); return NULL; } hbq_entry = lpfc_sli_hbqbuf_find(phba, tag); if (hbq_entry == NULL) { if (new_hbq_entry) (phba->hbqs[hbqno].hbq_free_buffer)(phba, new_hbq_entry); spin_unlock_irqrestore(&phba->hbalock, flags); return NULL; } list_del(&hbq_entry->dbuf.list); if (new_hbq_entry == NULL) { list_add_tail(&hbq_entry->dbuf.list, &phba->hbqbuf_in_list); spin_unlock_irqrestore(&phba->hbalock, flags); return &hbq_entry->dbuf; } new_hbq_entry->tag = -1; phys = new_hbq_entry->dbuf.phys; virt = new_hbq_entry->dbuf.virt; new_hbq_entry->dbuf.phys = hbq_entry->dbuf.phys; new_hbq_entry->dbuf.virt = hbq_entry->dbuf.virt; hbq_entry->dbuf.phys = phys; hbq_entry->dbuf.virt = virt; lpfc_sli_free_hbq(phba, hbq_entry); list_add_tail(&new_hbq_entry->dbuf.list, &phba->hbqbuf_in_list); spin_unlock_irqrestore(&phba->hbalock, flags); return &new_hbq_entry->dbuf; } /** * lpfc_sli_get_buff: Get the buffer associated with the buffer tag. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @tag: buffer tag. * * This function is called with no lock held. When QUE_BUFTAG_BIT bit * is set in the tag the buffer is posted for a particular exchange, * the function will return the buffer without replacing the buffer. * If the buffer is for unsolicited ELS or CT traffic, this function * returns the buffer and also posts another buffer to the firmware. **/ static struct lpfc_dmabuf * lpfc_sli_get_buff(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, uint32_t tag) { if (tag & QUE_BUFTAG_BIT) return lpfc_sli_ring_taggedbuf_get(phba, pring, tag); else return lpfc_sli_replace_hbqbuff(phba, tag); } /** * lpfc_sli_process_unsol_iocb: Unsolicited iocb handler. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @saveq: Pointer to the unsolicited iocb. * * This function is called with no lock held by the ring event handler * when there is an unsolicited iocb posted to the response ring by the * firmware. This function gets the buffer associated with the iocbs * and calls the event handler for the ring. This function handles both * qring buffers and hbq buffers. * When the function returns 1 the caller can free the iocb object otherwise * upper layer functions will free the iocb objects. **/ static int lpfc_sli_process_unsol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *saveq) { IOCB_t * irsp; WORD5 * w5p; uint32_t Rctl, Type; uint32_t match, i; struct lpfc_iocbq *iocbq; struct lpfc_dmabuf *dmzbuf; match = 0; irsp = &(saveq->iocb); if (irsp->ulpStatus == IOSTAT_NEED_BUFFER) return 1; if (irsp->ulpCommand == CMD_ASYNC_STATUS) { if (pring->lpfc_sli_rcv_async_status) pring->lpfc_sli_rcv_async_status(phba, pring, saveq); else lpfc_printf_log(phba, KERN_WARNING, LOG_SLI, "0316 Ring %d handler: unexpected " "ASYNC_STATUS iocb received evt_code " "0x%x\n", pring->ringno, irsp->un.asyncstat.evt_code); return 1; } if ((irsp->ulpCommand == CMD_IOCB_RET_XRI64_CX) && (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)) { if (irsp->ulpBdeCount > 0) { dmzbuf = lpfc_sli_get_buff(phba, pring, irsp->un.ulpWord[3]); lpfc_in_buf_free(phba, dmzbuf); } if (irsp->ulpBdeCount > 1) { dmzbuf = lpfc_sli_get_buff(phba, pring, irsp->unsli3.sli3Words[3]); lpfc_in_buf_free(phba, dmzbuf); } if (irsp->ulpBdeCount > 2) { dmzbuf = lpfc_sli_get_buff(phba, pring, irsp->unsli3.sli3Words[7]); lpfc_in_buf_free(phba, dmzbuf); } return 1; } if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) { if (irsp->ulpBdeCount != 0) { saveq->context2 = lpfc_sli_get_buff(phba, pring, irsp->un.ulpWord[3]); if (!saveq->context2) lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0341 Ring %d Cannot find buffer for " "an unsolicited iocb. tag 0x%x\n", pring->ringno, irsp->un.ulpWord[3]); } if (irsp->ulpBdeCount == 2) { saveq->context3 = lpfc_sli_get_buff(phba, pring, irsp->unsli3.sli3Words[7]); if (!saveq->context3) lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0342 Ring %d Cannot find buffer for an" " unsolicited iocb. tag 0x%x\n", pring->ringno, irsp->unsli3.sli3Words[7]); } list_for_each_entry(iocbq, &saveq->list, list) { irsp = &(iocbq->iocb); if (irsp->ulpBdeCount != 0) { iocbq->context2 = lpfc_sli_get_buff(phba, pring, irsp->un.ulpWord[3]); if (!iocbq->context2) lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0343 Ring %d Cannot find " "buffer for an unsolicited iocb" ". tag 0x%x\n", pring->ringno, irsp->un.ulpWord[3]); } if (irsp->ulpBdeCount == 2) { iocbq->context3 = lpfc_sli_get_buff(phba, pring, irsp->unsli3.sli3Words[7]); if (!iocbq->context3) lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0344 Ring %d Cannot find " "buffer for an unsolicited " "iocb. tag 0x%x\n", pring->ringno, irsp->unsli3.sli3Words[7]); } } } if (irsp->ulpBdeCount != 0 && (irsp->ulpCommand == CMD_IOCB_RCV_CONT64_CX || irsp->ulpStatus == IOSTAT_INTERMED_RSP)) { int found = 0; /* search continue save q for same XRI */ list_for_each_entry(iocbq, &pring->iocb_continue_saveq, clist) { if (iocbq->iocb.ulpContext == saveq->iocb.ulpContext) { list_add_tail(&saveq->list, &iocbq->list); found = 1; break; } } if (!found) list_add_tail(&saveq->clist, &pring->iocb_continue_saveq); if (saveq->iocb.ulpStatus != IOSTAT_INTERMED_RSP) { list_del_init(&iocbq->clist); saveq = iocbq; irsp = &(saveq->iocb); } else return 0; } if ((irsp->ulpCommand == CMD_RCV_ELS_REQ64_CX) || (irsp->ulpCommand == CMD_RCV_ELS_REQ_CX) || (irsp->ulpCommand == CMD_IOCB_RCV_ELS64_CX)) { Rctl = FC_ELS_REQ; Type = FC_ELS_DATA; } else { w5p = (WORD5 *)&(saveq->iocb.un.ulpWord[5]); Rctl = w5p->hcsw.Rctl; Type = w5p->hcsw.Type; /* Firmware Workaround */ if ((Rctl == 0) && (pring->ringno == LPFC_ELS_RING) && (irsp->ulpCommand == CMD_RCV_SEQUENCE64_CX || irsp->ulpCommand == CMD_IOCB_RCV_SEQ64_CX)) { Rctl = FC_ELS_REQ; Type = FC_ELS_DATA; w5p->hcsw.Rctl = Rctl; w5p->hcsw.Type = Type; } } /* unSolicited Responses */ if (pring->prt[0].profile) { if (pring->prt[0].lpfc_sli_rcv_unsol_event) (pring->prt[0].lpfc_sli_rcv_unsol_event) (phba, pring, saveq); match = 1; } else { /* We must search, based on rctl / type for the right routine */ for (i = 0; i < pring->num_mask; i++) { if ((pring->prt[i].rctl == Rctl) && (pring->prt[i].type == Type)) { if (pring->prt[i].lpfc_sli_rcv_unsol_event) (pring->prt[i].lpfc_sli_rcv_unsol_event) (phba, pring, saveq); match = 1; break; } } } if (match == 0) { /* Unexpected Rctl / Type received */ /* Ring handler: unexpected Rctl Type received */ lpfc_printf_log(phba, KERN_WARNING, LOG_SLI, "0313 Ring %d handler: unexpected Rctl x%x " "Type x%x received\n", pring->ringno, Rctl, Type); } return 1; } /** * lpfc_sli_iocbq_lookup: Find command iocb for the given response iocb. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @prspiocb: Pointer to response iocb object. * * This function looks up the iocb_lookup table to get the command iocb * corresponding to the given response iocb using the iotag of the * response iocb. This function is called with the hbalock held. * This function returns the command iocb object if it finds the command * iocb else returns NULL. **/ static struct lpfc_iocbq * lpfc_sli_iocbq_lookup(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *prspiocb) { struct lpfc_iocbq *cmd_iocb = NULL; uint16_t iotag; iotag = prspiocb->iocb.ulpIoTag; if (iotag != 0 && iotag <= phba->sli.last_iotag) { cmd_iocb = phba->sli.iocbq_lookup[iotag]; list_del_init(&cmd_iocb->list); pring->txcmplq_cnt--; return cmd_iocb; } lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0317 iotag x%x is out off " "range: max iotag x%x wd0 x%x\n", iotag, phba->sli.last_iotag, *(((uint32_t *) &prspiocb->iocb) + 7)); return NULL; } /** * lpfc_sli_process_sol_iocb: process solicited iocb completion. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @saveq: Pointer to the response iocb to be processed. * * This function is called by the ring event handler for non-fcp * rings when there is a new response iocb in the response ring. * The caller is not required to hold any locks. This function * gets the command iocb associated with the response iocb and * calls the completion handler for the command iocb. If there * is no completion handler, the function will free the resources * associated with command iocb. If the response iocb is for * an already aborted command iocb, the status of the completion * is changed to IOSTAT_LOCAL_REJECT/IOERR_SLI_ABORTED. * This function always returns 1. **/ static int lpfc_sli_process_sol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *saveq) { struct lpfc_iocbq *cmdiocbp; int rc = 1; unsigned long iflag; /* Based on the iotag field, get the cmd IOCB from the txcmplq */ spin_lock_irqsave(&phba->hbalock, iflag); cmdiocbp = lpfc_sli_iocbq_lookup(phba, pring, saveq); spin_unlock_irqrestore(&phba->hbalock, iflag); if (cmdiocbp) { if (cmdiocbp->iocb_cmpl) { /* * If an ELS command failed send an event to mgmt * application. */ if (saveq->iocb.ulpStatus && (pring->ringno == LPFC_ELS_RING) && (cmdiocbp->iocb.ulpCommand == CMD_ELS_REQUEST64_CR)) lpfc_send_els_failure_event(phba, cmdiocbp, saveq); /* * Post all ELS completions to the worker thread. * All other are passed to the completion callback. */ if (pring->ringno == LPFC_ELS_RING) { if (cmdiocbp->iocb_flag & LPFC_DRIVER_ABORTED) { cmdiocbp->iocb_flag &= ~LPFC_DRIVER_ABORTED; saveq->iocb.ulpStatus = IOSTAT_LOCAL_REJECT; saveq->iocb.un.ulpWord[4] = IOERR_SLI_ABORTED; /* Firmware could still be in progress * of DMAing payload, so don't free data * buffer till after a hbeat. */ saveq->iocb_flag |= LPFC_DELAY_MEM_FREE; } } (cmdiocbp->iocb_cmpl) (phba, cmdiocbp, saveq); } else lpfc_sli_release_iocbq(phba, cmdiocbp); } else { /* * Unknown initiating command based on the response iotag. * This could be the case on the ELS ring because of * lpfc_els_abort(). */ if (pring->ringno != LPFC_ELS_RING) { /* * Ring handler: unexpected completion IoTag * */ lpfc_printf_vlog(cmdiocbp->vport, KERN_WARNING, LOG_SLI, "0322 Ring %d handler: " "unexpected completion IoTag x%x " "Data: x%x x%x x%x x%x\n", pring->ringno, saveq->iocb.ulpIoTag, saveq->iocb.ulpStatus, saveq->iocb.un.ulpWord[4], saveq->iocb.ulpCommand, saveq->iocb.ulpContext); } } return rc; } /** * lpfc_sli_rsp_pointers_error: Response ring pointer error handler. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * * This function is called from the iocb ring event handlers when * put pointer is ahead of the get pointer for a ring. This function signal * an error attention condition to the worker thread and the worker * thread will transition the HBA to offline state. **/ static void lpfc_sli_rsp_pointers_error(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) { struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno]; /* * Ring handler: portRspPut is bigger then * rsp ring */ lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0312 Ring %d handler: portRspPut %d " "is bigger then rsp ring %d\n", pring->ringno, le32_to_cpu(pgp->rspPutInx), pring->numRiocb); phba->link_state = LPFC_HBA_ERROR; /* * All error attention handlers are posted to * worker thread */ phba->work_ha |= HA_ERATT; phba->work_hs = HS_FFER3; lpfc_worker_wake_up(phba); return; } /** * lpfc_poll_eratt: Error attention polling timer timeout handler. * @ptr: Pointer to address of HBA context object. * * This function is invoked by the Error Attention polling timer when the * timer times out. It will check the SLI Error Attention register for * possible attention events. If so, it will post an Error Attention event * and wake up worker thread to process it. Otherwise, it will set up the * Error Attention polling timer for the next poll. **/ void lpfc_poll_eratt(unsigned long ptr) { struct lpfc_hba *phba; uint32_t eratt = 0; phba = (struct lpfc_hba *)ptr; /* Check chip HA register for error event */ eratt = lpfc_sli_check_eratt(phba); if (eratt) /* Tell the worker thread there is work to do */ lpfc_worker_wake_up(phba); else /* Restart the timer for next eratt poll */ mod_timer(&phba->eratt_poll, jiffies + HZ * LPFC_ERATT_POLL_INTERVAL); return; } /** * lpfc_sli_poll_fcp_ring: Handle FCP ring completion in polling mode. * @phba: Pointer to HBA context object. * * This function is called from lpfc_queuecommand, lpfc_poll_timeout, * lpfc_abort_handler and lpfc_slave_configure when FCP_RING_POLLING * is enabled. * * The caller does not hold any lock. * The function processes each response iocb in the response ring until it * finds an iocb with LE bit set and chains all the iocbs upto the iocb with * LE bit set. The function will call the completion handler of the command iocb * if the response iocb indicates a completion for a command iocb or it is * an abort completion. **/ void lpfc_sli_poll_fcp_ring(struct lpfc_hba *phba) { struct lpfc_sli *psli = &phba->sli; struct lpfc_sli_ring *pring = &psli->ring[LPFC_FCP_RING]; IOCB_t *irsp = NULL; IOCB_t *entry = NULL; struct lpfc_iocbq *cmdiocbq = NULL; struct lpfc_iocbq rspiocbq; struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno]; uint32_t status; uint32_t portRspPut, portRspMax; int type; uint32_t rsp_cmpl = 0; uint32_t ha_copy; unsigned long iflags; pring->stats.iocb_event++; /* * The next available response entry should never exceed the maximum * entries. If it does, treat it as an adapter hardware error. */ portRspMax = pring->numRiocb; portRspPut = le32_to_cpu(pgp->rspPutInx); if (unlikely(portRspPut >= portRspMax)) { lpfc_sli_rsp_pointers_error(phba, pring); return; } rmb(); while (pring->rspidx != portRspPut) { entry = lpfc_resp_iocb(phba, pring); if (++pring->rspidx >= portRspMax) pring->rspidx = 0; lpfc_sli_pcimem_bcopy((uint32_t *) entry, (uint32_t *) &rspiocbq.iocb, phba->iocb_rsp_size); irsp = &rspiocbq.iocb; type = lpfc_sli_iocb_cmd_type(irsp->ulpCommand & CMD_IOCB_MASK); pring->stats.iocb_rsp++; rsp_cmpl++; if (unlikely(irsp->ulpStatus)) { /* Rsp ring error: IOCB */ lpfc_printf_log(phba, KERN_WARNING, LOG_SLI, "0326 Rsp Ring %d error: IOCB Data: " "x%x x%x x%x x%x x%x x%x x%x x%x\n", pring->ringno, irsp->un.ulpWord[0], irsp->un.ulpWord[1], irsp->un.ulpWord[2], irsp->un.ulpWord[3], irsp->un.ulpWord[4], irsp->un.ulpWord[5], *(uint32_t *)&irsp->un1, *((uint32_t *)&irsp->un1 + 1)); } switch (type) { case LPFC_ABORT_IOCB: case LPFC_SOL_IOCB: /* * Idle exchange closed via ABTS from port. No iocb * resources need to be recovered. */ if (unlikely(irsp->ulpCommand == CMD_XRI_ABORTED_CX)) { lpfc_printf_log(phba, KERN_INFO, LOG_SLI, "0314 IOCB cmd 0x%x " "processed. Skipping " "completion", irsp->ulpCommand); break; } spin_lock_irqsave(&phba->hbalock, iflags); cmdiocbq = lpfc_sli_iocbq_lookup(phba, pring, &rspiocbq); spin_unlock_irqrestore(&phba->hbalock, iflags); if ((cmdiocbq) && (cmdiocbq->iocb_cmpl)) { (cmdiocbq->iocb_cmpl)(phba, cmdiocbq, &rspiocbq); } break; default: if (irsp->ulpCommand == CMD_ADAPTER_MSG) { char adaptermsg[LPFC_MAX_ADPTMSG]; memset(adaptermsg, 0, LPFC_MAX_ADPTMSG); memcpy(&adaptermsg[0], (uint8_t *) irsp, MAX_MSG_DATA); dev_warn(&((phba->pcidev)->dev), "lpfc%d: %s\n", phba->brd_no, adaptermsg); } else { /* Unknown IOCB command */ lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0321 Unknown IOCB command " "Data: x%x, x%x x%x x%x x%x\n", type, irsp->ulpCommand, irsp->ulpStatus, irsp->ulpIoTag, irsp->ulpContext); } break; } /* * The response IOCB has been processed. Update the ring * pointer in SLIM. If the port response put pointer has not * been updated, sync the pgp->rspPutInx and fetch the new port * response put pointer. */ writel(pring->rspidx, &phba->host_gp[pring->ringno].rspGetInx); if (pring->rspidx == portRspPut) portRspPut = le32_to_cpu(pgp->rspPutInx); } ha_copy = readl(phba->HAregaddr); ha_copy >>= (LPFC_FCP_RING * 4); if ((rsp_cmpl > 0) && (ha_copy & HA_R0RE_REQ)) { spin_lock_irqsave(&phba->hbalock, iflags); pring->stats.iocb_rsp_full++; status = ((CA_R0ATT | CA_R0RE_RSP) << (LPFC_FCP_RING * 4)); writel(status, phba->CAregaddr); readl(phba->CAregaddr); spin_unlock_irqrestore(&phba->hbalock, iflags); } if ((ha_copy & HA_R0CE_RSP) && (pring->flag & LPFC_CALL_RING_AVAILABLE)) { spin_lock_irqsave(&phba->hbalock, iflags); pring->flag &= ~LPFC_CALL_RING_AVAILABLE; pring->stats.iocb_cmd_empty++; /* Force update of the local copy of cmdGetInx */ pring->local_getidx = le32_to_cpu(pgp->cmdGetInx); lpfc_sli_resume_iocb(phba, pring); if ((pring->lpfc_sli_cmd_available)) (pring->lpfc_sli_cmd_available) (phba, pring); spin_unlock_irqrestore(&phba->hbalock, iflags); } return; } /** * lpfc_sli_handle_fast_ring_event: Handle ring events on FCP ring. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @mask: Host attention register mask for this ring. * * This function is called from the interrupt context when there is a ring * event for the fcp ring. The caller does not hold any lock. * The function processes each response iocb in the response ring until it * finds an iocb with LE bit set and chains all the iocbs upto the iocb with * LE bit set. The function will call the completion handler of the command iocb * if the response iocb indicates a completion for a command iocb or it is * an abort completion. The function will call lpfc_sli_process_unsol_iocb * function if this is an unsolicited iocb. * This routine presumes LPFC_FCP_RING handling and doesn't bother * to check it explicitly. This function always returns 1. **/ static int lpfc_sli_handle_fast_ring_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, uint32_t mask) { struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno]; IOCB_t *irsp = NULL; IOCB_t *entry = NULL; struct lpfc_iocbq *cmdiocbq = NULL; struct lpfc_iocbq rspiocbq; uint32_t status; uint32_t portRspPut, portRspMax; int rc = 1; lpfc_iocb_type type; unsigned long iflag; uint32_t rsp_cmpl = 0; spin_lock_irqsave(&phba->hbalock, iflag); pring->stats.iocb_event++; /* * The next available response entry should never exceed the maximum * entries. If it does, treat it as an adapter hardware error. */ portRspMax = pring->numRiocb; portRspPut = le32_to_cpu(pgp->rspPutInx); if (unlikely(portRspPut >= portRspMax)) { lpfc_sli_rsp_pointers_error(phba, pring); spin_unlock_irqrestore(&phba->hbalock, iflag); return 1; } rmb(); while (pring->rspidx != portRspPut) { /* * Fetch an entry off the ring and copy it into a local data * structure. The copy involves a byte-swap since the * network byte order and pci byte orders are different. */ entry = lpfc_resp_iocb(phba, pring); phba->last_completion_time = jiffies; if (++pring->rspidx >= portRspMax) pring->rspidx = 0; lpfc_sli_pcimem_bcopy((uint32_t *) entry, (uint32_t *) &rspiocbq.iocb, phba->iocb_rsp_size); INIT_LIST_HEAD(&(rspiocbq.list)); irsp = &rspiocbq.iocb; type = lpfc_sli_iocb_cmd_type(irsp->ulpCommand & CMD_IOCB_MASK); pring->stats.iocb_rsp++; rsp_cmpl++; if (unlikely(irsp->ulpStatus)) { /* * If resource errors reported from HBA, reduce * queuedepths of the SCSI device. */ if ((irsp->ulpStatus == IOSTAT_LOCAL_REJECT) && (irsp->un.ulpWord[4] == IOERR_NO_RESOURCES)) { spin_unlock_irqrestore(&phba->hbalock, iflag); lpfc_rampdown_queue_depth(phba); spin_lock_irqsave(&phba->hbalock, iflag); } /* Rsp ring error: IOCB */ lpfc_printf_log(phba, KERN_WARNING, LOG_SLI, "0336 Rsp Ring %d error: IOCB Data: " "x%x x%x x%x x%x x%x x%x x%x x%x\n", pring->ringno, irsp->un.ulpWord[0], irsp->un.ulpWord[1], irsp->un.ulpWord[2], irsp->un.ulpWord[3], irsp->un.ulpWord[4], irsp->un.ulpWord[5], *(uint32_t *)&irsp->un1, *((uint32_t *)&irsp->un1 + 1)); } switch (type) { case LPFC_ABORT_IOCB: case LPFC_SOL_IOCB: /* * Idle exchange closed via ABTS from port. No iocb * resources need to be recovered. */ if (unlikely(irsp->ulpCommand == CMD_XRI_ABORTED_CX)) { lpfc_printf_log(phba, KERN_INFO, LOG_SLI, "0333 IOCB cmd 0x%x" " processed. Skipping" " completion\n", irsp->ulpCommand); break; } cmdiocbq = lpfc_sli_iocbq_lookup(phba, pring, &rspiocbq); if ((cmdiocbq) && (cmdiocbq->iocb_cmpl)) { if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { (cmdiocbq->iocb_cmpl)(phba, cmdiocbq, &rspiocbq); } else { spin_unlock_irqrestore(&phba->hbalock, iflag); (cmdiocbq->iocb_cmpl)(phba, cmdiocbq, &rspiocbq); spin_lock_irqsave(&phba->hbalock, iflag); } } break; case LPFC_UNSOL_IOCB: spin_unlock_irqrestore(&phba->hbalock, iflag); lpfc_sli_process_unsol_iocb(phba, pring, &rspiocbq); spin_lock_irqsave(&phba->hbalock, iflag); break; default: if (irsp->ulpCommand == CMD_ADAPTER_MSG) { char adaptermsg[LPFC_MAX_ADPTMSG]; memset(adaptermsg, 0, LPFC_MAX_ADPTMSG); memcpy(&adaptermsg[0], (uint8_t *) irsp, MAX_MSG_DATA); dev_warn(&((phba->pcidev)->dev), "lpfc%d: %s\n", phba->brd_no, adaptermsg); } else { /* Unknown IOCB command */ lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0334 Unknown IOCB command " "Data: x%x, x%x x%x x%x x%x\n", type, irsp->ulpCommand, irsp->ulpStatus, irsp->ulpIoTag, irsp->ulpContext); } break; } /* * The response IOCB has been processed. Update the ring * pointer in SLIM. If the port response put pointer has not * been updated, sync the pgp->rspPutInx and fetch the new port * response put pointer. */ writel(pring->rspidx, &phba->host_gp[pring->ringno].rspGetInx); if (pring->rspidx == portRspPut) portRspPut = le32_to_cpu(pgp->rspPutInx); } if ((rsp_cmpl > 0) && (mask & HA_R0RE_REQ)) { pring->stats.iocb_rsp_full++; status = ((CA_R0ATT | CA_R0RE_RSP) << (pring->ringno * 4)); writel(status, phba->CAregaddr); readl(phba->CAregaddr); } if ((mask & HA_R0CE_RSP) && (pring->flag & LPFC_CALL_RING_AVAILABLE)) { pring->flag &= ~LPFC_CALL_RING_AVAILABLE; pring->stats.iocb_cmd_empty++; /* Force update of the local copy of cmdGetInx */ pring->local_getidx = le32_to_cpu(pgp->cmdGetInx); lpfc_sli_resume_iocb(phba, pring); if ((pring->lpfc_sli_cmd_available)) (pring->lpfc_sli_cmd_available) (phba, pring); } spin_unlock_irqrestore(&phba->hbalock, iflag); return rc; } /** * lpfc_sli_handle_slow_ring_event: Handle ring events for non-FCP rings. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @mask: Host attention register mask for this ring. * * This function is called from the worker thread when there is a ring * event for non-fcp rings. The caller does not hold any lock . * The function processes each response iocb in the response ring until it * finds an iocb with LE bit set and chains all the iocbs upto the iocb with * LE bit set. The function will call lpfc_sli_process_sol_iocb function if the * response iocb indicates a completion of a command iocb. The function * will call lpfc_sli_process_unsol_iocb function if this is an unsolicited * iocb. The function frees the resources or calls the completion handler if * this iocb is an abort completion. The function returns 0 when the allocated * iocbs are not freed, otherwise returns 1. **/ int lpfc_sli_handle_slow_ring_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, uint32_t mask) { struct lpfc_pgp *pgp; IOCB_t *entry; IOCB_t *irsp = NULL; struct lpfc_iocbq *rspiocbp = NULL; struct lpfc_iocbq *next_iocb; struct lpfc_iocbq *cmdiocbp; struct lpfc_iocbq *saveq; uint8_t iocb_cmd_type; lpfc_iocb_type type; uint32_t status, free_saveq; uint32_t portRspPut, portRspMax; int rc = 1; unsigned long iflag; pgp = &phba->port_gp[pring->ringno]; spin_lock_irqsave(&phba->hbalock, iflag); pring->stats.iocb_event++; /* * The next available response entry should never exceed the maximum * entries. If it does, treat it as an adapter hardware error. */ portRspMax = pring->numRiocb; portRspPut = le32_to_cpu(pgp->rspPutInx); if (portRspPut >= portRspMax) { /* * Ring handler: portRspPut is bigger then * rsp ring */ lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0303 Ring %d handler: portRspPut %d " "is bigger then rsp ring %d\n", pring->ringno, portRspPut, portRspMax); phba->link_state = LPFC_HBA_ERROR; spin_unlock_irqrestore(&phba->hbalock, iflag); phba->work_hs = HS_FFER3; lpfc_handle_eratt(phba); return 1; } rmb(); while (pring->rspidx != portRspPut) { /* * Build a completion list and call the appropriate handler. * The process is to get the next available response iocb, get * a free iocb from the list, copy the response data into the * free iocb, insert to the continuation list, and update the * next response index to slim. This process makes response * iocb's in the ring available to DMA as fast as possible but * pays a penalty for a copy operation. Since the iocb is * only 32 bytes, this penalty is considered small relative to * the PCI reads for register values and a slim write. When * the ulpLe field is set, the entire Command has been * received. */ entry = lpfc_resp_iocb(phba, pring); phba->last_completion_time = jiffies; rspiocbp = __lpfc_sli_get_iocbq(phba); if (rspiocbp == NULL) { printk(KERN_ERR "%s: out of buffers! Failing " "completion.\n", __func__); break; } lpfc_sli_pcimem_bcopy(entry, &rspiocbp->iocb, phba->iocb_rsp_size); irsp = &rspiocbp->iocb; if (++pring->rspidx >= portRspMax) pring->rspidx = 0; if (pring->ringno == LPFC_ELS_RING) { lpfc_debugfs_slow_ring_trc(phba, "IOCB rsp ring: wd4:x%08x wd6:x%08x wd7:x%08x", *(((uint32_t *) irsp) + 4), *(((uint32_t *) irsp) + 6), *(((uint32_t *) irsp) + 7)); } writel(pring->rspidx, &phba->host_gp[pring->ringno].rspGetInx); list_add_tail(&rspiocbp->list, &(pring->iocb_continueq)); pring->iocb_continueq_cnt++; if (irsp->ulpLe) { /* * By default, the driver expects to free all resources * associated with this iocb completion. */ free_saveq = 1; saveq = list_get_first(&pring->iocb_continueq, struct lpfc_iocbq, list); irsp = &(saveq->iocb); list_del_init(&pring->iocb_continueq); pring->iocb_continueq_cnt = 0; pring->stats.iocb_rsp++; /* * If resource errors reported from HBA, reduce * queuedepths of the SCSI device. */ if ((irsp->ulpStatus == IOSTAT_LOCAL_REJECT) && (irsp->un.ulpWord[4] == IOERR_NO_RESOURCES)) { spin_unlock_irqrestore(&phba->hbalock, iflag); lpfc_rampdown_queue_depth(phba); spin_lock_irqsave(&phba->hbalock, iflag); } if (irsp->ulpStatus) { /* Rsp ring error: IOCB */ lpfc_printf_log(phba, KERN_WARNING, LOG_SLI, "0328 Rsp Ring %d error: " "IOCB Data: " "x%x x%x x%x x%x " "x%x x%x x%x x%x " "x%x x%x x%x x%x " "x%x x%x x%x x%x\n", pring->ringno, irsp->un.ulpWord[0], irsp->un.ulpWord[1], irsp->un.ulpWord[2], irsp->un.ulpWord[3], irsp->un.ulpWord[4], irsp->un.ulpWord[5], *(((uint32_t *) irsp) + 6), *(((uint32_t *) irsp) + 7), *(((uint32_t *) irsp) + 8), *(((uint32_t *) irsp) + 9), *(((uint32_t *) irsp) + 10), *(((uint32_t *) irsp) + 11), *(((uint32_t *) irsp) + 12), *(((uint32_t *) irsp) + 13), *(((uint32_t *) irsp) + 14), *(((uint32_t *) irsp) + 15)); } /* * Fetch the IOCB command type and call the correct * completion routine. Solicited and Unsolicited * IOCBs on the ELS ring get freed back to the * lpfc_iocb_list by the discovery kernel thread. */ iocb_cmd_type = irsp->ulpCommand & CMD_IOCB_MASK; type = lpfc_sli_iocb_cmd_type(iocb_cmd_type); if (type == LPFC_SOL_IOCB) { spin_unlock_irqrestore(&phba->hbalock, iflag); rc = lpfc_sli_process_sol_iocb(phba, pring, saveq); spin_lock_irqsave(&phba->hbalock, iflag); } else if (type == LPFC_UNSOL_IOCB) { spin_unlock_irqrestore(&phba->hbalock, iflag); rc = lpfc_sli_process_unsol_iocb(phba, pring, saveq); spin_lock_irqsave(&phba->hbalock, iflag); if (!rc) free_saveq = 0; } else if (type == LPFC_ABORT_IOCB) { if ((irsp->ulpCommand != CMD_XRI_ABORTED_CX) && ((cmdiocbp = lpfc_sli_iocbq_lookup(phba, pring, saveq)))) { /* Call the specified completion routine */ if (cmdiocbp->iocb_cmpl) { spin_unlock_irqrestore( &phba->hbalock, iflag); (cmdiocbp->iocb_cmpl) (phba, cmdiocbp, saveq); spin_lock_irqsave( &phba->hbalock, iflag); } else __lpfc_sli_release_iocbq(phba, cmdiocbp); } } else if (type == LPFC_UNKNOWN_IOCB) { if (irsp->ulpCommand == CMD_ADAPTER_MSG) { char adaptermsg[LPFC_MAX_ADPTMSG]; memset(adaptermsg, 0, LPFC_MAX_ADPTMSG); memcpy(&adaptermsg[0], (uint8_t *) irsp, MAX_MSG_DATA); dev_warn(&((phba->pcidev)->dev), "lpfc%d: %s\n", phba->brd_no, adaptermsg); } else { /* Unknown IOCB command */ lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0335 Unknown IOCB " "command Data: x%x " "x%x x%x x%x\n", irsp->ulpCommand, irsp->ulpStatus, irsp->ulpIoTag, irsp->ulpContext); } } if (free_saveq) { list_for_each_entry_safe(rspiocbp, next_iocb, &saveq->list, list) { list_del(&rspiocbp->list); __lpfc_sli_release_iocbq(phba, rspiocbp); } __lpfc_sli_release_iocbq(phba, saveq); } rspiocbp = NULL; } /* * If the port response put pointer has not been updated, sync * the pgp->rspPutInx in the MAILBOX_tand fetch the new port * response put pointer. */ if (pring->rspidx == portRspPut) { portRspPut = le32_to_cpu(pgp->rspPutInx); } } /* while (pring->rspidx != portRspPut) */ if ((rspiocbp != NULL) && (mask & HA_R0RE_REQ)) { /* At least one response entry has been freed */ pring->stats.iocb_rsp_full++; /* SET RxRE_RSP in Chip Att register */ status = ((CA_R0ATT | CA_R0RE_RSP) << (pring->ringno * 4)); writel(status, phba->CAregaddr); readl(phba->CAregaddr); /* flush */ } if ((mask & HA_R0CE_RSP) && (pring->flag & LPFC_CALL_RING_AVAILABLE)) { pring->flag &= ~LPFC_CALL_RING_AVAILABLE; pring->stats.iocb_cmd_empty++; /* Force update of the local copy of cmdGetInx */ pring->local_getidx = le32_to_cpu(pgp->cmdGetInx); lpfc_sli_resume_iocb(phba, pring); if ((pring->lpfc_sli_cmd_available)) (pring->lpfc_sli_cmd_available) (phba, pring); } spin_unlock_irqrestore(&phba->hbalock, iflag); return rc; } /** * lpfc_sli_abort_iocb_ring: Abort all iocbs in the ring. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * * This function aborts all iocbs in the given ring and frees all the iocb * objects in txq. This function issues an abort iocb for all the iocb commands * in txcmplq. The iocbs in the txcmplq is not guaranteed to complete before * the return of this function. The caller is not required to hold any locks. **/ void lpfc_sli_abort_iocb_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) { LIST_HEAD(completions); struct lpfc_iocbq *iocb, *next_iocb; IOCB_t *cmd = NULL; if (pring->ringno == LPFC_ELS_RING) { lpfc_fabric_abort_hba(phba); } /* Error everything on txq and txcmplq * First do the txq. */ spin_lock_irq(&phba->hbalock); list_splice_init(&pring->txq, &completions); pring->txq_cnt = 0; /* Next issue ABTS for everything on the txcmplq */ list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) lpfc_sli_issue_abort_iotag(phba, pring, iocb); spin_unlock_irq(&phba->hbalock); while (!list_empty(&completions)) { iocb = list_get_first(&completions, struct lpfc_iocbq, list); cmd = &iocb->iocb; list_del_init(&iocb->list); if (!iocb->iocb_cmpl) lpfc_sli_release_iocbq(phba, iocb); else { cmd->ulpStatus = IOSTAT_LOCAL_REJECT; cmd->un.ulpWord[4] = IOERR_SLI_ABORTED; (iocb->iocb_cmpl) (phba, iocb, iocb); } } } /** * lpfc_sli_flush_fcp_rings: flush all iocbs in the fcp ring. * @phba: Pointer to HBA context object. * * This function flushes all iocbs in the fcp ring and frees all the iocb * objects in txq and txcmplq. This function will not issue abort iocbs * for all the iocb commands in txcmplq, they will just be returned with * IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI * slot has been permanently disabled. **/ void lpfc_sli_flush_fcp_rings(struct lpfc_hba *phba) { LIST_HEAD(txq); LIST_HEAD(txcmplq); struct lpfc_iocbq *iocb; IOCB_t *cmd = NULL; struct lpfc_sli *psli = &phba->sli; struct lpfc_sli_ring *pring; /* Currently, only one fcp ring */ pring = &psli->ring[psli->fcp_ring]; spin_lock_irq(&phba->hbalock); /* Retrieve everything on txq */ list_splice_init(&pring->txq, &txq); pring->txq_cnt = 0; /* Retrieve everything on the txcmplq */ list_splice_init(&pring->txcmplq, &txcmplq); pring->txcmplq_cnt = 0; spin_unlock_irq(&phba->hbalock); /* Flush the txq */ while (!list_empty(&txq)) { iocb = list_get_first(&txq, struct lpfc_iocbq, list); cmd = &iocb->iocb; list_del_init(&iocb->list); if (!iocb->iocb_cmpl) lpfc_sli_release_iocbq(phba, iocb); else { cmd->ulpStatus = IOSTAT_LOCAL_REJECT; cmd->un.ulpWord[4] = IOERR_SLI_DOWN; (iocb->iocb_cmpl) (phba, iocb, iocb); } } /* Flush the txcmpq */ while (!list_empty(&txcmplq)) { iocb = list_get_first(&txcmplq, struct lpfc_iocbq, list); cmd = &iocb->iocb; list_del_init(&iocb->list); if (!iocb->iocb_cmpl) lpfc_sli_release_iocbq(phba, iocb); else { cmd->ulpStatus = IOSTAT_LOCAL_REJECT; cmd->un.ulpWord[4] = IOERR_SLI_DOWN; (iocb->iocb_cmpl) (phba, iocb, iocb); } } } /** * lpfc_sli_brdready: Check for host status bits. * @phba: Pointer to HBA context object. * @mask: Bit mask to be checked. * * This function reads the host status register and compares * with the provided bit mask to check if HBA completed * the restart. This function will wait in a loop for the * HBA to complete restart. If the HBA does not restart within * 15 iterations, the function will reset the HBA again. The * function returns 1 when HBA fail to restart otherwise returns * zero. **/ int lpfc_sli_brdready(struct lpfc_hba *phba, uint32_t mask) { uint32_t status; int i = 0; int retval = 0; /* Read the HBA Host Status Register */ status = readl(phba->HSregaddr); /* * Check status register every 100ms for 5 retries, then every * 500ms for 5, then every 2.5 sec for 5, then reset board and * every 2.5 sec for 4. * Break our of the loop if errors occurred during init. */ while (((status & mask) != mask) && !(status & HS_FFERM) && i++ < 20) { if (i <= 5) msleep(10); else if (i <= 10) msleep(500); else msleep(2500); if (i == 15) { /* Do post */ phba->pport->port_state = LPFC_VPORT_UNKNOWN; lpfc_sli_brdrestart(phba); } /* Read the HBA Host Status Register */ status = readl(phba->HSregaddr); } /* Check to see if any errors occurred during init */ if ((status & HS_FFERM) || (i >= 20)) { phba->link_state = LPFC_HBA_ERROR; retval = 1; } return retval; } #define BARRIER_TEST_PATTERN (0xdeadbeef) /** * lpfc_reset_barrier: Make HBA ready for HBA reset. * @phba: Pointer to HBA context object. * * This function is called before resetting an HBA. This * function requests HBA to quiesce DMAs before a reset. **/ void lpfc_reset_barrier(struct lpfc_hba *phba) { uint32_t __iomem *resp_buf; uint32_t __iomem *mbox_buf; volatile uint32_t mbox; uint32_t hc_copy; int i; uint8_t hdrtype; pci_read_config_byte(phba->pcidev, PCI_HEADER_TYPE, &hdrtype); if (hdrtype != 0x80 || (FC_JEDEC_ID(phba->vpd.rev.biuRev) != HELIOS_JEDEC_ID && FC_JEDEC_ID(phba->vpd.rev.biuRev) != THOR_JEDEC_ID)) return; /* * Tell the other part of the chip to suspend temporarily all * its DMA activity. */ resp_buf = phba->MBslimaddr; /* Disable the error attention */ hc_copy = readl(phba->HCregaddr); writel((hc_copy & ~HC_ERINT_ENA), phba->HCregaddr); readl(phba->HCregaddr); /* flush */ phba->link_flag |= LS_IGNORE_ERATT; if (readl(phba->HAregaddr) & HA_ERATT) { /* Clear Chip error bit */ writel(HA_ERATT, phba->HAregaddr); phba->pport->stopped = 1; } mbox = 0; ((MAILBOX_t *)&mbox)->mbxCommand = MBX_KILL_BOARD; ((MAILBOX_t *)&mbox)->mbxOwner = OWN_CHIP; writel(BARRIER_TEST_PATTERN, (resp_buf + 1)); mbox_buf = phba->MBslimaddr; writel(mbox, mbox_buf); for (i = 0; readl(resp_buf + 1) != ~(BARRIER_TEST_PATTERN) && i < 50; i++) mdelay(1); if (readl(resp_buf + 1) != ~(BARRIER_TEST_PATTERN)) { if (phba->sli.sli_flag & LPFC_SLI2_ACTIVE || phba->pport->stopped) goto restore_hc; else goto clear_errat; } ((MAILBOX_t *)&mbox)->mbxOwner = OWN_HOST; for (i = 0; readl(resp_buf) != mbox && i < 500; i++) mdelay(1); clear_errat: while (!(readl(phba->HAregaddr) & HA_ERATT) && ++i < 500) mdelay(1); if (readl(phba->HAregaddr) & HA_ERATT) { writel(HA_ERATT, phba->HAregaddr); phba->pport->stopped = 1; } restore_hc: phba->link_flag &= ~LS_IGNORE_ERATT; writel(hc_copy, phba->HCregaddr); readl(phba->HCregaddr); /* flush */ } /** * lpfc_sli_brdkill: Issue a kill_board mailbox command. * @phba: Pointer to HBA context object. * * This function issues a kill_board mailbox command and waits for * the error attention interrupt. This function is called for stopping * the firmware processing. The caller is not required to hold any * locks. This function calls lpfc_hba_down_post function to free * any pending commands after the kill. The function will return 1 when it * fails to kill the board else will return 0. **/ int lpfc_sli_brdkill(struct lpfc_hba *phba) { struct lpfc_sli *psli; LPFC_MBOXQ_t *pmb; uint32_t status; uint32_t ha_copy; int retval; int i = 0; psli = &phba->sli; /* Kill HBA */ lpfc_printf_log(phba, KERN_INFO, LOG_SLI, "0329 Kill HBA Data: x%x x%x\n", phba->pport->port_state, psli->sli_flag); pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL); if (!pmb) return 1; /* Disable the error attention */ spin_lock_irq(&phba->hbalock); status = readl(phba->HCregaddr); status &= ~HC_ERINT_ENA; writel(status, phba->HCregaddr); readl(phba->HCregaddr); /* flush */ phba->link_flag |= LS_IGNORE_ERATT; spin_unlock_irq(&phba->hbalock); lpfc_kill_board(phba, pmb); pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl; retval = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT); if (retval != MBX_SUCCESS) { if (retval != MBX_BUSY) mempool_free(pmb, phba->mbox_mem_pool); spin_lock_irq(&phba->hbalock); phba->link_flag &= ~LS_IGNORE_ERATT; spin_unlock_irq(&phba->hbalock); return 1; } psli->sli_flag &= ~LPFC_SLI2_ACTIVE; mempool_free(pmb, phba->mbox_mem_pool); /* There is no completion for a KILL_BOARD mbox cmd. Check for an error * attention every 100ms for 3 seconds. If we don't get ERATT after * 3 seconds we still set HBA_ERROR state because the status of the * board is now undefined. */ ha_copy = readl(phba->HAregaddr); while ((i++ < 30) && !(ha_copy & HA_ERATT)) { mdelay(100); ha_copy = readl(phba->HAregaddr); } del_timer_sync(&psli->mbox_tmo); if (ha_copy & HA_ERATT) { writel(HA_ERATT, phba->HAregaddr); phba->pport->stopped = 1; } spin_lock_irq(&phba->hbalock); psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; phba->link_flag &= ~LS_IGNORE_ERATT; spin_unlock_irq(&phba->hbalock); psli->mbox_active = NULL; lpfc_hba_down_post(phba); phba->link_state = LPFC_HBA_ERROR; return ha_copy & HA_ERATT ? 0 : 1; } /** * lpfc_sli_brdreset: Reset the HBA. * @phba: Pointer to HBA context object. * * This function resets the HBA by writing HC_INITFF to the control * register. After the HBA resets, this function resets all the iocb ring * indices. This function disables PCI layer parity checking during * the reset. * This function returns 0 always. * The caller is not required to hold any locks. **/ int lpfc_sli_brdreset(struct lpfc_hba *phba) { struct lpfc_sli *psli; struct lpfc_sli_ring *pring; uint16_t cfg_value; int i; psli = &phba->sli; /* Reset HBA */ lpfc_printf_log(phba, KERN_INFO, LOG_SLI, "0325 Reset HBA Data: x%x x%x\n", phba->pport->port_state, psli->sli_flag); /* perform board reset */ phba->fc_eventTag = 0; phba->pport->fc_myDID = 0; phba->pport->fc_prevDID = 0; /* Turn off parity checking and serr during the physical reset */ pci_read_config_word(phba->pcidev, PCI_COMMAND, &cfg_value); pci_write_config_word(phba->pcidev, PCI_COMMAND, (cfg_value & ~(PCI_COMMAND_PARITY | PCI_COMMAND_SERR))); psli->sli_flag &= ~(LPFC_SLI2_ACTIVE | LPFC_PROCESS_LA); /* Now toggle INITFF bit in the Host Control Register */ writel(HC_INITFF, phba->HCregaddr); mdelay(1); readl(phba->HCregaddr); /* flush */ writel(0, phba->HCregaddr); readl(phba->HCregaddr); /* flush */ /* Restore PCI cmd register */ pci_write_config_word(phba->pcidev, PCI_COMMAND, cfg_value); /* Initialize relevant SLI info */ for (i = 0; i < psli->num_rings; i++) { pring = &psli->ring[i]; pring->flag = 0; pring->rspidx = 0; pring->next_cmdidx = 0; pring->local_getidx = 0; pring->cmdidx = 0; pring->missbufcnt = 0; } phba->link_state = LPFC_WARM_START; return 0; } /** * lpfc_sli_brdrestart: Restart the HBA. * @phba: Pointer to HBA context object. * * This function is called in the SLI initialization code path to * restart the HBA. The caller is not required to hold any lock. * This function writes MBX_RESTART mailbox command to the SLIM and * resets the HBA. At the end of the function, it calls lpfc_hba_down_post * function to free any pending commands. The function enables * POST only during the first initialization. The function returns zero. * The function does not guarantee completion of MBX_RESTART mailbox * command before the return of this function. **/ int lpfc_sli_brdrestart(struct lpfc_hba *phba) { MAILBOX_t *mb; struct lpfc_sli *psli; volatile uint32_t word0; void __iomem *to_slim; spin_lock_irq(&phba->hbalock); psli = &phba->sli; /* Restart HBA */ lpfc_printf_log(phba, KERN_INFO, LOG_SLI, "0337 Restart HBA Data: x%x x%x\n", phba->pport->port_state, psli->sli_flag); word0 = 0; mb = (MAILBOX_t *) &word0; mb->mbxCommand = MBX_RESTART; mb->mbxHc = 1; lpfc_reset_barrier(phba); to_slim = phba->MBslimaddr; writel(*(uint32_t *) mb, to_slim); readl(to_slim); /* flush */ /* Only skip post after fc_ffinit is completed */ if (phba->pport->port_state) word0 = 1; /* This is really setting up word1 */ else word0 = 0; /* This is really setting up word1 */ to_slim = phba->MBslimaddr + sizeof (uint32_t); writel(*(uint32_t *) mb, to_slim); readl(to_slim); /* flush */ lpfc_sli_brdreset(phba); phba->pport->stopped = 0; phba->link_state = LPFC_INIT_START; spin_unlock_irq(&phba->hbalock); memset(&psli->lnk_stat_offsets, 0, sizeof(psli->lnk_stat_offsets)); psli->stats_start = get_seconds(); /* Give the INITFF and Post time to settle. */ mdelay(100); lpfc_hba_down_post(phba); return 0; } /** * lpfc_sli_chipset_init: Wait for the restart of the HBA after a restart. * @phba: Pointer to HBA context object. * * This function is called after a HBA restart to wait for successful * restart of the HBA. Successful restart of the HBA is indicated by * HS_FFRDY and HS_MBRDY bits. If the HBA fails to restart even after 15 * iteration, the function will restart the HBA again. The function returns * zero if HBA successfully restarted else returns negative error code. **/ static int lpfc_sli_chipset_init(struct lpfc_hba *phba) { uint32_t status, i = 0; /* Read the HBA Host Status Register */ status = readl(phba->HSregaddr); /* Check status register to see what current state is */ i = 0; while ((status & (HS_FFRDY | HS_MBRDY)) != (HS_FFRDY | HS_MBRDY)) { /* Check every 100ms for 5 retries, then every 500ms for 5, then * every 2.5 sec for 5, then reset board and every 2.5 sec for * 4. */ if (i++ >= 20) { /* Adapter failed to init, timeout, status reg */ lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "0436 Adapter failed to init, " "timeout, status reg x%x, " "FW Data: A8 x%x AC x%x\n", status, readl(phba->MBslimaddr + 0xa8), readl(phba->MBslimaddr + 0xac)); phba->link_state = LPFC_HBA_ERROR; return -ETIMEDOUT; } /* Check to see if any errors occurred during init */ if (status & HS_FFERM) { /* ERROR: During chipset initialization */ /* Adapter failed to init, chipset, status reg */ lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "0437 Adapter failed to init, " "chipset, status reg x%x, " "FW Data: A8 x%x AC x%x\n", status, readl(phba->MBslimaddr + 0xa8), readl(phba->MBslimaddr + 0xac)); phba->link_state = LPFC_HBA_ERROR; return -EIO; } if (i <= 5) { msleep(10); } else if (i <= 10) { msleep(500); } else { msleep(2500); } if (i == 15) { /* Do post */ phba->pport->port_state = LPFC_VPORT_UNKNOWN; lpfc_sli_brdrestart(phba); } /* Read the HBA Host Status Register */ status = readl(phba->HSregaddr); } /* Check to see if any errors occurred during init */ if (status & HS_FFERM) { /* ERROR: During chipset initialization */ /* Adapter failed to init, chipset, status reg */ lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "0438 Adapter failed to init, chipset, " "status reg x%x, " "FW Data: A8 x%x AC x%x\n", status, readl(phba->MBslimaddr + 0xa8), readl(phba->MBslimaddr + 0xac)); phba->link_state = LPFC_HBA_ERROR; return -EIO; } /* Clear all interrupt enable conditions */ writel(0, phba->HCregaddr); readl(phba->HCregaddr); /* flush */ /* setup host attn register */ writel(0xffffffff, phba->HAregaddr); readl(phba->HAregaddr); /* flush */ return 0; } /** * lpfc_sli_hbq_count: Get the number of HBQs to be configured. * * This function calculates and returns the number of HBQs required to be * configured. **/ int lpfc_sli_hbq_count(void) { return ARRAY_SIZE(lpfc_hbq_defs); } /** * lpfc_sli_hbq_entry_count: Calculate total number of hbq entries. * * This function adds the number of hbq entries in every HBQ to get * the total number of hbq entries required for the HBA and returns * the total count. **/ static int lpfc_sli_hbq_entry_count(void) { int hbq_count = lpfc_sli_hbq_count(); int count = 0; int i; for (i = 0; i < hbq_count; ++i) count += lpfc_hbq_defs[i]->entry_count; return count; } /** * lpfc_sli_hbq_size: Calculate memory required for all hbq entries. * * This function calculates amount of memory required for all hbq entries * to be configured and returns the total memory required. **/ int lpfc_sli_hbq_size(void) { return lpfc_sli_hbq_entry_count() * sizeof(struct lpfc_hbq_entry); } /** * lpfc_sli_hbq_setup: configure and initialize HBQs. * @phba: Pointer to HBA context object. * * This function is called during the SLI initialization to configure * all the HBQs and post buffers to the HBQ. The caller is not * required to hold any locks. This function will return zero if successful * else it will return negative error code. **/ static int lpfc_sli_hbq_setup(struct lpfc_hba *phba) { int hbq_count = lpfc_sli_hbq_count(); LPFC_MBOXQ_t *pmb; MAILBOX_t *pmbox; uint32_t hbqno; uint32_t hbq_entry_index; /* Get a Mailbox buffer to setup mailbox * commands for HBA initialization */ pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL); if (!pmb) return -ENOMEM; pmbox = &pmb->mb; /* Initialize the struct lpfc_sli_hbq structure for each hbq */ phba->link_state = LPFC_INIT_MBX_CMDS; phba->hbq_in_use = 1; hbq_entry_index = 0; for (hbqno = 0; hbqno < hbq_count; ++hbqno) { phba->hbqs[hbqno].next_hbqPutIdx = 0; phba->hbqs[hbqno].hbqPutIdx = 0; phba->hbqs[hbqno].local_hbqGetIdx = 0; phba->hbqs[hbqno].entry_count = lpfc_hbq_defs[hbqno]->entry_count; lpfc_config_hbq(phba, hbqno, lpfc_hbq_defs[hbqno], hbq_entry_index, pmb); hbq_entry_index += phba->hbqs[hbqno].entry_count; if (lpfc_sli_issue_mbox(phba, pmb, MBX_POLL) != MBX_SUCCESS) { /* Adapter failed to init, mbxCmd CFG_RING, mbxStatus , ring */ lpfc_printf_log(phba, KERN_ERR, LOG_SLI | LOG_VPORT, "1805 Adapter failed to init. " "Data: x%x x%x x%x\n", pmbox->mbxCommand, pmbox->mbxStatus, hbqno); phba->link_state = LPFC_HBA_ERROR; mempool_free(pmb, phba->mbox_mem_pool); return ENXIO; } } phba->hbq_count = hbq_count; mempool_free(pmb, phba->mbox_mem_pool); /* Initially populate or replenish the HBQs */ for (hbqno = 0; hbqno < hbq_count; ++hbqno) lpfc_sli_hbqbuf_init_hbqs(phba, hbqno); return 0; } /** * lpfc_sli_config_port: Issue config port mailbox command. * @phba: Pointer to HBA context object. * @sli_mode: sli mode - 2/3 * * This function is called by the sli intialization code path * to issue config_port mailbox command. This function restarts the * HBA firmware and issues a config_port mailbox command to configure * the SLI interface in the sli mode specified by sli_mode * variable. The caller is not required to hold any locks. * The function returns 0 if successful, else returns negative error * code. **/ int lpfc_sli_config_port(struct lpfc_hba *phba, int sli_mode) { LPFC_MBOXQ_t *pmb; uint32_t resetcount = 0, rc = 0, done = 0; pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL); if (!pmb) { phba->link_state = LPFC_HBA_ERROR; return -ENOMEM; } phba->sli_rev = sli_mode; while (resetcount < 2 && !done) { spin_lock_irq(&phba->hbalock); phba->sli.sli_flag |= LPFC_SLI_MBOX_ACTIVE; spin_unlock_irq(&phba->hbalock); phba->pport->port_state = LPFC_VPORT_UNKNOWN; lpfc_sli_brdrestart(phba); rc = lpfc_sli_chipset_init(phba); if (rc) break; spin_lock_irq(&phba->hbalock); phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; spin_unlock_irq(&phba->hbalock); resetcount++; /* Call pre CONFIG_PORT mailbox command initialization. A * value of 0 means the call was successful. Any other * nonzero value is a failure, but if ERESTART is returned, * the driver may reset the HBA and try again. */ rc = lpfc_config_port_prep(phba); if (rc == -ERESTART) { phba->link_state = LPFC_LINK_UNKNOWN; continue; } else if (rc) break; phba->link_state = LPFC_INIT_MBX_CMDS; lpfc_config_port(phba, pmb); rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL); phba->sli3_options &= ~(LPFC_SLI3_NPIV_ENABLED | LPFC_SLI3_HBQ_ENABLED | LPFC_SLI3_CRP_ENABLED | LPFC_SLI3_INB_ENABLED); if (rc != MBX_SUCCESS) { lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "0442 Adapter failed to init, mbxCmd x%x " "CONFIG_PORT, mbxStatus x%x Data: x%x\n", pmb->mb.mbxCommand, pmb->mb.mbxStatus, 0); spin_lock_irq(&phba->hbalock); phba->sli.sli_flag &= ~LPFC_SLI2_ACTIVE; spin_unlock_irq(&phba->hbalock); rc = -ENXIO; } else done = 1; } if (!done) { rc = -EINVAL; goto do_prep_failed; } if (pmb->mb.un.varCfgPort.sli_mode == 3) { if (!pmb->mb.un.varCfgPort.cMA) { rc = -ENXIO; goto do_prep_failed; } if (phba->max_vpi && pmb->mb.un.varCfgPort.gmv) { phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED; phba->max_vpi = pmb->mb.un.varCfgPort.max_vpi; } else phba->max_vpi = 0; if (pmb->mb.un.varCfgPort.gerbm) phba->sli3_options |= LPFC_SLI3_HBQ_ENABLED; if (pmb->mb.un.varCfgPort.gcrp) phba->sli3_options |= LPFC_SLI3_CRP_ENABLED; if (pmb->mb.un.varCfgPort.ginb) { phba->sli3_options |= LPFC_SLI3_INB_ENABLED; phba->hbq_get = phba->mbox->us.s3_inb_pgp.hbq_get; phba->port_gp = phba->mbox->us.s3_inb_pgp.port; phba->inb_ha_copy = &phba->mbox->us.s3_inb_pgp.ha_copy; phba->inb_counter = &phba->mbox->us.s3_inb_pgp.counter; phba->inb_last_counter = phba->mbox->us.s3_inb_pgp.counter; } else { phba->hbq_get = phba->mbox->us.s3_pgp.hbq_get; phba->port_gp = phba->mbox->us.s3_pgp.port; phba->inb_ha_copy = NULL; phba->inb_counter = NULL; } } else { phba->hbq_get = NULL; phba->port_gp = phba->mbox->us.s2.port; phba->inb_ha_copy = NULL; phba->inb_counter = NULL; phba->max_vpi = 0; } do_prep_failed: mempool_free(pmb, phba->mbox_mem_pool); return rc; } /** * lpfc_sli_hba_setup: SLI intialization function. * @phba: Pointer to HBA context object. * * This function is the main SLI intialization function. This function * is called by the HBA intialization code, HBA reset code and HBA * error attention handler code. Caller is not required to hold any * locks. This function issues config_port mailbox command to configure * the SLI, setup iocb rings and HBQ rings. In the end the function * calls the config_port_post function to issue init_link mailbox * command and to start the discovery. The function will return zero * if successful, else it will return negative error code. **/ int lpfc_sli_hba_setup(struct lpfc_hba *phba) { uint32_t rc; int mode = 3; switch (lpfc_sli_mode) { case 2: if (phba->cfg_enable_npiv) { lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT, "1824 NPIV enabled: Override lpfc_sli_mode " "parameter (%d) to auto (0).\n", lpfc_sli_mode); break; } mode = 2; break; case 0: case 3: break; default: lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT, "1819 Unrecognized lpfc_sli_mode " "parameter: %d.\n", lpfc_sli_mode); break; } rc = lpfc_sli_config_port(phba, mode); if (rc && lpfc_sli_mode == 3) lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT, "1820 Unable to select SLI-3. " "Not supported by adapter.\n"); if (rc && mode != 2) rc = lpfc_sli_config_port(phba, 2); if (rc) goto lpfc_sli_hba_setup_error; if (phba->sli_rev == 3) { phba->iocb_cmd_size = SLI3_IOCB_CMD_SIZE; phba->iocb_rsp_size = SLI3_IOCB_RSP_SIZE; } else { phba->iocb_cmd_size = SLI2_IOCB_CMD_SIZE; phba->iocb_rsp_size = SLI2_IOCB_RSP_SIZE; phba->sli3_options = 0; } lpfc_printf_log(phba, KERN_INFO, LOG_INIT, "0444 Firmware in SLI %x mode. Max_vpi %d\n", phba->sli_rev, phba->max_vpi); rc = lpfc_sli_ring_map(phba); if (rc) goto lpfc_sli_hba_setup_error; /* Init HBQs */ if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) { rc = lpfc_sli_hbq_setup(phba); if (rc) goto lpfc_sli_hba_setup_error; } phba->sli.sli_flag |= LPFC_PROCESS_LA; rc = lpfc_config_port_post(phba); if (rc) goto lpfc_sli_hba_setup_error; return rc; lpfc_sli_hba_setup_error: phba->link_state = LPFC_HBA_ERROR; lpfc_printf_log(phba, KERN_INFO, LOG_INIT, "0445 Firmware initialization failed\n"); return rc; } /** * lpfc_mbox_timeout: Timeout call back function for mbox timer. * @ptr: context object - pointer to hba structure. * * This is the callback function for mailbox timer. The mailbox * timer is armed when a new mailbox command is issued and the timer * is deleted when the mailbox complete. The function is called by * the kernel timer code when a mailbox does not complete within * expected time. This function wakes up the worker thread to * process the mailbox timeout and returns. All the processing is * done by the worker thread function lpfc_mbox_timeout_handler. **/ void lpfc_mbox_timeout(unsigned long ptr) { struct lpfc_hba *phba = (struct lpfc_hba *) ptr; unsigned long iflag; uint32_t tmo_posted; spin_lock_irqsave(&phba->pport->work_port_lock, iflag); tmo_posted = phba->pport->work_port_events & WORKER_MBOX_TMO; if (!tmo_posted) phba->pport->work_port_events |= WORKER_MBOX_TMO; spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag); if (!tmo_posted) lpfc_worker_wake_up(phba); return; } /** * lpfc_mbox_timeout_handler: Worker thread function to handle mailbox timeout. * @phba: Pointer to HBA context object. * * This function is called from worker thread when a mailbox command times out. * The caller is not required to hold any locks. This function will reset the * HBA and recover all the pending commands. **/ void lpfc_mbox_timeout_handler(struct lpfc_hba *phba) { LPFC_MBOXQ_t *pmbox = phba->sli.mbox_active; MAILBOX_t *mb = &pmbox->mb; struct lpfc_sli *psli = &phba->sli; struct lpfc_sli_ring *pring; /* Mbox cmd timeout */ lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI, "0310 Mailbox command x%x timeout Data: x%x x%x x%p\n", mb->mbxCommand, phba->pport->port_state, phba->sli.sli_flag, phba->sli.mbox_active); /* Setting state unknown so lpfc_sli_abort_iocb_ring * would get IOCB_ERROR from lpfc_sli_issue_iocb, allowing * it to fail all oustanding SCSI IO. */ spin_lock_irq(&phba->pport->work_port_lock); phba->pport->work_port_events &= ~WORKER_MBOX_TMO; spin_unlock_irq(&phba->pport->work_port_lock); spin_lock_irq(&phba->hbalock); phba->link_state = LPFC_LINK_UNKNOWN; psli->sli_flag &= ~LPFC_SLI2_ACTIVE; spin_unlock_irq(&phba->hbalock); pring = &psli->ring[psli->fcp_ring]; lpfc_sli_abort_iocb_ring(phba, pring); lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI, "0345 Resetting board due to mailbox timeout\n"); /* * lpfc_offline calls lpfc_sli_hba_down which will clean up * on oustanding mailbox commands. */ /* If resets are disabled then set error state and return. */ if (!phba->cfg_enable_hba_reset) { phba->link_state = LPFC_HBA_ERROR; return; } lpfc_offline_prep(phba); lpfc_offline(phba); lpfc_sli_brdrestart(phba); lpfc_online(phba); lpfc_unblock_mgmt_io(phba); return; } /** * lpfc_sli_issue_mbox: Issue a mailbox command to firmware. * @phba: Pointer to HBA context object. * @pmbox: Pointer to mailbox object. * @flag: Flag indicating how the mailbox need to be processed. * * This function is called by discovery code and HBA management code * to submit a mailbox command to firmware. This function gets the * hbalock to protect the data structures. * The mailbox command can be submitted in polling mode, in which case * this function will wait in a polling loop for the completion of the * mailbox. * If the mailbox is submitted in no_wait mode (not polling) the * function will submit the command and returns immediately without waiting * for the mailbox completion. The no_wait is supported only when HBA * is in SLI2/SLI3 mode - interrupts are enabled. * The SLI interface allows only one mailbox pending at a time. If the * mailbox is issued in polling mode and there is already a mailbox * pending, then the function will return an error. If the mailbox is issued * in NO_WAIT mode and there is a mailbox pending already, the function * will return MBX_BUSY after queuing the mailbox into mailbox queue. * The sli layer owns the mailbox object until the completion of mailbox * command if this function return MBX_BUSY or MBX_SUCCESS. For all other * return codes the caller owns the mailbox command after the return of * the function. **/ int lpfc_sli_issue_mbox(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmbox, uint32_t flag) { MAILBOX_t *mb; struct lpfc_sli *psli = &phba->sli; uint32_t status, evtctr; uint32_t ha_copy; int i; unsigned long timeout; unsigned long drvr_flag = 0; uint32_t word0, ldata; void __iomem *to_slim; int processing_queue = 0; spin_lock_irqsave(&phba->hbalock, drvr_flag); if (!pmbox) { /* processing mbox queue from intr_handler */ processing_queue = 1; phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; pmbox = lpfc_mbox_get(phba); if (!pmbox) { spin_unlock_irqrestore(&phba->hbalock, drvr_flag); return MBX_SUCCESS; } } if (pmbox->mbox_cmpl && pmbox->mbox_cmpl != lpfc_sli_def_mbox_cmpl && pmbox->mbox_cmpl != lpfc_sli_wake_mbox_wait) { if(!pmbox->vport) { spin_unlock_irqrestore(&phba->hbalock, drvr_flag); lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_VPORT, "1806 Mbox x%x failed. No vport\n", pmbox->mb.mbxCommand); dump_stack(); goto out_not_finished; } } /* If the PCI channel is in offline state, do not post mbox. */ if (unlikely(pci_channel_offline(phba->pcidev))) { spin_unlock_irqrestore(&phba->hbalock, drvr_flag); goto out_not_finished; } psli = &phba->sli; mb = &pmbox->mb; status = MBX_SUCCESS; if (phba->link_state == LPFC_HBA_ERROR) { spin_unlock_irqrestore(&phba->hbalock, drvr_flag); /* Mbox command cannot issue */ LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag); goto out_not_finished; } if (mb->mbxCommand != MBX_KILL_BOARD && flag & MBX_NOWAIT && !(readl(phba->HCregaddr) & HC_MBINT_ENA)) { spin_unlock_irqrestore(&phba->hbalock, drvr_flag); LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag); goto out_not_finished; } if (psli->sli_flag & LPFC_SLI_MBOX_ACTIVE) { /* Polling for a mbox command when another one is already active * is not allowed in SLI. Also, the driver must have established * SLI2 mode to queue and process multiple mbox commands. */ if (flag & MBX_POLL) { spin_unlock_irqrestore(&phba->hbalock, drvr_flag); /* Mbox command cannot issue */ LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag); goto out_not_finished; } if (!(psli->sli_flag & LPFC_SLI2_ACTIVE)) { spin_unlock_irqrestore(&phba->hbalock, drvr_flag); /* Mbox command cannot issue */ LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag); goto out_not_finished; } /* Another mailbox command is still being processed, queue this * command to be processed later. */ lpfc_mbox_put(phba, pmbox); /* Mbox cmd issue - BUSY */ lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI, "(%d):0308 Mbox cmd issue - BUSY Data: " "x%x x%x x%x x%x\n", pmbox->vport ? pmbox->vport->vpi : 0xffffff, mb->mbxCommand, phba->pport->port_state, psli->sli_flag, flag); psli->slistat.mbox_busy++; spin_unlock_irqrestore(&phba->hbalock, drvr_flag); if (pmbox->vport) { lpfc_debugfs_disc_trc(pmbox->vport, LPFC_DISC_TRC_MBOX_VPORT, "MBOX Bsy vport: cmd:x%x mb:x%x x%x", (uint32_t)mb->mbxCommand, mb->un.varWords[0], mb->un.varWords[1]); } else { lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_MBOX, "MBOX Bsy: cmd:x%x mb:x%x x%x", (uint32_t)mb->mbxCommand, mb->un.varWords[0], mb->un.varWords[1]); } return MBX_BUSY; } psli->sli_flag |= LPFC_SLI_MBOX_ACTIVE; /* If we are not polling, we MUST be in SLI2 mode */ if (flag != MBX_POLL) { if (!(psli->sli_flag & LPFC_SLI2_ACTIVE) && (mb->mbxCommand != MBX_KILL_BOARD)) { psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; spin_unlock_irqrestore(&phba->hbalock, drvr_flag); /* Mbox command cannot issue */ LOG_MBOX_CANNOT_ISSUE_DATA(phba, pmbox, psli, flag); goto out_not_finished; } /* timeout active mbox command */ mod_timer(&psli->mbox_tmo, (jiffies + (HZ * lpfc_mbox_tmo_val(phba, mb->mbxCommand)))); } /* Mailbox cmd issue */ lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI, "(%d):0309 Mailbox cmd x%x issue Data: x%x x%x " "x%x\n", pmbox->vport ? pmbox->vport->vpi : 0, mb->mbxCommand, phba->pport->port_state, psli->sli_flag, flag); if (mb->mbxCommand != MBX_HEARTBEAT) { if (pmbox->vport) { lpfc_debugfs_disc_trc(pmbox->vport, LPFC_DISC_TRC_MBOX_VPORT, "MBOX Send vport: cmd:x%x mb:x%x x%x", (uint32_t)mb->mbxCommand, mb->un.varWords[0], mb->un.varWords[1]); } else { lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_MBOX, "MBOX Send: cmd:x%x mb:x%x x%x", (uint32_t)mb->mbxCommand, mb->un.varWords[0], mb->un.varWords[1]); } } psli->slistat.mbox_cmd++; evtctr = psli->slistat.mbox_event; /* next set own bit for the adapter and copy over command word */ mb->mbxOwner = OWN_CHIP; if (psli->sli_flag & LPFC_SLI2_ACTIVE) { /* First copy command data to host SLIM area */ lpfc_sli_pcimem_bcopy(mb, phba->mbox, MAILBOX_CMD_SIZE); } else { if (mb->mbxCommand == MBX_CONFIG_PORT) { /* copy command data into host mbox for cmpl */ lpfc_sli_pcimem_bcopy(mb, phba->mbox, MAILBOX_CMD_SIZE); } /* First copy mbox command data to HBA SLIM, skip past first word */ to_slim = phba->MBslimaddr + sizeof (uint32_t); lpfc_memcpy_to_slim(to_slim, &mb->un.varWords[0], MAILBOX_CMD_SIZE - sizeof (uint32_t)); /* Next copy over first word, with mbxOwner set */ ldata = *((uint32_t *)mb); to_slim = phba->MBslimaddr; writel(ldata, to_slim); readl(to_slim); /* flush */ if (mb->mbxCommand == MBX_CONFIG_PORT) { /* switch over to host mailbox */ psli->sli_flag |= LPFC_SLI2_ACTIVE; } } wmb(); switch (flag) { case MBX_NOWAIT: /* Set up reference to mailbox command */ psli->mbox_active = pmbox; /* Interrupt board to do it */ writel(CA_MBATT, phba->CAregaddr); readl(phba->CAregaddr); /* flush */ /* Don't wait for it to finish, just return */ break; case MBX_POLL: /* Set up null reference to mailbox command */ psli->mbox_active = NULL; /* Interrupt board to do it */ writel(CA_MBATT, phba->CAregaddr); readl(phba->CAregaddr); /* flush */ if (psli->sli_flag & LPFC_SLI2_ACTIVE) { /* First read mbox status word */ word0 = *((uint32_t *)phba->mbox); word0 = le32_to_cpu(word0); } else { /* First read mbox status word */ word0 = readl(phba->MBslimaddr); } /* Read the HBA Host Attention Register */ ha_copy = readl(phba->HAregaddr); timeout = msecs_to_jiffies(lpfc_mbox_tmo_val(phba, mb->mbxCommand) * 1000) + jiffies; i = 0; /* Wait for command to complete */ while (((word0 & OWN_CHIP) == OWN_CHIP) || (!(ha_copy & HA_MBATT) && (phba->link_state > LPFC_WARM_START))) { if (time_after(jiffies, timeout)) { psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; spin_unlock_irqrestore(&phba->hbalock, drvr_flag); goto out_not_finished; } /* Check if we took a mbox interrupt while we were polling */ if (((word0 & OWN_CHIP) != OWN_CHIP) && (evtctr != psli->slistat.mbox_event)) break; if (i++ > 10) { spin_unlock_irqrestore(&phba->hbalock, drvr_flag); msleep(1); spin_lock_irqsave(&phba->hbalock, drvr_flag); } if (psli->sli_flag & LPFC_SLI2_ACTIVE) { /* First copy command data */ word0 = *((uint32_t *)phba->mbox); word0 = le32_to_cpu(word0); if (mb->mbxCommand == MBX_CONFIG_PORT) { MAILBOX_t *slimmb; uint32_t slimword0; /* Check real SLIM for any errors */ slimword0 = readl(phba->MBslimaddr); slimmb = (MAILBOX_t *) & slimword0; if (((slimword0 & OWN_CHIP) != OWN_CHIP) && slimmb->mbxStatus) { psli->sli_flag &= ~LPFC_SLI2_ACTIVE; word0 = slimword0; } } } else { /* First copy command data */ word0 = readl(phba->MBslimaddr); } /* Read the HBA Host Attention Register */ ha_copy = readl(phba->HAregaddr); } if (psli->sli_flag & LPFC_SLI2_ACTIVE) { /* copy results back to user */ lpfc_sli_pcimem_bcopy(phba->mbox, mb, MAILBOX_CMD_SIZE); } else { /* First copy command data */ lpfc_memcpy_from_slim(mb, phba->MBslimaddr, MAILBOX_CMD_SIZE); if ((mb->mbxCommand == MBX_DUMP_MEMORY) && pmbox->context2) { lpfc_memcpy_from_slim((void *)pmbox->context2, phba->MBslimaddr + DMP_RSP_OFFSET, mb->un.varDmp.word_cnt); } } writel(HA_MBATT, phba->HAregaddr); readl(phba->HAregaddr); /* flush */ psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; status = mb->mbxStatus; } spin_unlock_irqrestore(&phba->hbalock, drvr_flag); return status; out_not_finished: if (processing_queue) { pmbox->mb.mbxStatus = MBX_NOT_FINISHED; lpfc_mbox_cmpl_put(phba, pmbox); } return MBX_NOT_FINISHED; } /** * __lpfc_sli_ringtx_put: Add an iocb to the txq. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @piocb: Pointer to address of newly added command iocb. * * This function is called with hbalock held to add a command * iocb to the txq when SLI layer cannot submit the command iocb * to the ring. **/ static void __lpfc_sli_ringtx_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *piocb) { /* Insert the caller's iocb in the txq tail for later processing. */ list_add_tail(&piocb->list, &pring->txq); pring->txq_cnt++; } /** * lpfc_sli_next_iocb: Get the next iocb in the txq. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @piocb: Pointer to address of newly added command iocb. * * This function is called with hbalock held before a new * iocb is submitted to the firmware. This function checks * txq to flush the iocbs in txq to Firmware before * submitting new iocbs to the Firmware. * If there are iocbs in the txq which need to be submitted * to firmware, lpfc_sli_next_iocb returns the first element * of the txq after dequeuing it from txq. * If there is no iocb in the txq then the function will return * *piocb and *piocb is set to NULL. Caller needs to check * *piocb to find if there are more commands in the txq. **/ static struct lpfc_iocbq * lpfc_sli_next_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq **piocb) { struct lpfc_iocbq * nextiocb; nextiocb = lpfc_sli_ringtx_get(phba, pring); if (!nextiocb) { nextiocb = *piocb; *piocb = NULL; } return nextiocb; } /** * __lpfc_sli_issue_iocb: Lockless version of lpfc_sli_issue_iocb. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @piocb: Pointer to command iocb. * @flag: Flag indicating if this command can be put into txq. * * __lpfc_sli_issue_iocb is used by other functions in the driver * to issue an iocb command to the HBA. If the PCI slot is recovering * from error state or if HBA is resetting or if LPFC_STOP_IOCB_EVENT * flag is turned on, the function returns IOCB_ERROR. * When the link is down, this function allows only iocbs for * posting buffers. * This function finds next available slot in the command ring and * posts the command to the available slot and writes the port * attention register to request HBA start processing new iocb. * If there is no slot available in the ring and * flag & SLI_IOCB_RET_IOCB is set, the new iocb is added to the * txq, otherwise the function returns IOCB_BUSY. * * This function is called with hbalock held. * The function will return success after it successfully submit the * iocb to firmware or after adding to the txq. **/ static int __lpfc_sli_issue_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *piocb, uint32_t flag) { struct lpfc_iocbq *nextiocb; IOCB_t *iocb; if (piocb->iocb_cmpl && (!piocb->vport) && (piocb->iocb.ulpCommand != CMD_ABORT_XRI_CN) && (piocb->iocb.ulpCommand != CMD_CLOSE_XRI_CN)) { lpfc_printf_log(phba, KERN_ERR, LOG_SLI | LOG_VPORT, "1807 IOCB x%x failed. No vport\n", piocb->iocb.ulpCommand); dump_stack(); return IOCB_ERROR; } /* If the PCI channel is in offline state, do not post iocbs. */ if (unlikely(pci_channel_offline(phba->pcidev))) return IOCB_ERROR; /* * We should never get an IOCB if we are in a < LINK_DOWN state */ if (unlikely(phba->link_state < LPFC_LINK_DOWN)) return IOCB_ERROR; /* * Check to see if we are blocking IOCB processing because of a * outstanding event. */ if (unlikely(pring->flag & LPFC_STOP_IOCB_EVENT)) goto iocb_busy; if (unlikely(phba->link_state == LPFC_LINK_DOWN)) { /* * Only CREATE_XRI, CLOSE_XRI, and QUE_RING_BUF * can be issued if the link is not up. */ switch (piocb->iocb.ulpCommand) { case CMD_GEN_REQUEST64_CR: case CMD_GEN_REQUEST64_CX: if (!(phba->sli.sli_flag & LPFC_MENLO_MAINT) || (piocb->iocb.un.genreq64.w5.hcsw.Rctl != FC_FCP_CMND) || (piocb->iocb.un.genreq64.w5.hcsw.Type != MENLO_TRANSPORT_TYPE)) goto iocb_busy; break; case CMD_QUE_RING_BUF_CN: case CMD_QUE_RING_BUF64_CN: /* * For IOCBs, like QUE_RING_BUF, that have no rsp ring * completion, iocb_cmpl MUST be 0. */ if (piocb->iocb_cmpl) piocb->iocb_cmpl = NULL; /*FALLTHROUGH*/ case CMD_CREATE_XRI_CR: case CMD_CLOSE_XRI_CN: case CMD_CLOSE_XRI_CX: break; default: goto iocb_busy; } /* * For FCP commands, we must be in a state where we can process link * attention events. */ } else if (unlikely(pring->ringno == phba->sli.fcp_ring && !(phba->sli.sli_flag & LPFC_PROCESS_LA))) { goto iocb_busy; } while ((iocb = lpfc_sli_next_iocb_slot(phba, pring)) && (nextiocb = lpfc_sli_next_iocb(phba, pring, &piocb))) lpfc_sli_submit_iocb(phba, pring, iocb, nextiocb); if (iocb) lpfc_sli_update_ring(phba, pring); else lpfc_sli_update_full_ring(phba, pring); if (!piocb) return IOCB_SUCCESS; goto out_busy; iocb_busy: pring->stats.iocb_cmd_delay++; out_busy: if (!(flag & SLI_IOCB_RET_IOCB)) { __lpfc_sli_ringtx_put(phba, pring, piocb); return IOCB_SUCCESS; } return IOCB_BUSY; } /** * lpfc_sli_issue_iocb: Wrapper function for __lpfc_sli_issue_iocb. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @piocb: Pointer to command iocb. * @flag: Flag indicating if this command can be put into txq. * * lpfc_sli_issue_iocb is a wrapper around __lpfc_sli_issue_iocb * function. This function gets the hbalock and calls * __lpfc_sli_issue_iocb function and will return the error returned * by __lpfc_sli_issue_iocb function. This wrapper is used by * functions which do not hold hbalock. **/ int lpfc_sli_issue_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *piocb, uint32_t flag) { unsigned long iflags; int rc; spin_lock_irqsave(&phba->hbalock, iflags); rc = __lpfc_sli_issue_iocb(phba, pring, piocb, flag); spin_unlock_irqrestore(&phba->hbalock, iflags); return rc; } /** * lpfc_extra_ring_setup: Extra ring setup function. * @phba: Pointer to HBA context object. * * This function is called while driver attaches with the * HBA to setup the extra ring. The extra ring is used * only when driver needs to support target mode functionality * or IP over FC functionalities. * * This function is called with no lock held. **/ static int lpfc_extra_ring_setup( struct lpfc_hba *phba) { struct lpfc_sli *psli; struct lpfc_sli_ring *pring; psli = &phba->sli; /* Adjust cmd/rsp ring iocb entries more evenly */ /* Take some away from the FCP ring */ pring = &psli->ring[psli->fcp_ring]; pring->numCiocb -= SLI2_IOCB_CMD_R1XTRA_ENTRIES; pring->numRiocb -= SLI2_IOCB_RSP_R1XTRA_ENTRIES; pring->numCiocb -= SLI2_IOCB_CMD_R3XTRA_ENTRIES; pring->numRiocb -= SLI2_IOCB_RSP_R3XTRA_ENTRIES; /* and give them to the extra ring */ pring = &psli->ring[psli->extra_ring]; pring->numCiocb += SLI2_IOCB_CMD_R1XTRA_ENTRIES; pring->numRiocb += SLI2_IOCB_RSP_R1XTRA_ENTRIES; pring->numCiocb += SLI2_IOCB_CMD_R3XTRA_ENTRIES; pring->numRiocb += SLI2_IOCB_RSP_R3XTRA_ENTRIES; /* Setup default profile for this ring */ pring->iotag_max = 4096; pring->num_mask = 1; pring->prt[0].profile = 0; /* Mask 0 */ pring->prt[0].rctl = phba->cfg_multi_ring_rctl; pring->prt[0].type = phba->cfg_multi_ring_type; pring->prt[0].lpfc_sli_rcv_unsol_event = NULL; return 0; } /** * lpfc_sli_async_event_handler: ASYNC iocb handler function. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @iocbq: Pointer to iocb object. * * This function is called by the slow ring event handler * function when there is an ASYNC event iocb in the ring. * This function is called with no lock held. * Currently this function handles only temperature related * ASYNC events. The function decodes the temperature sensor * event message and posts events for the management applications. **/ static void lpfc_sli_async_event_handler(struct lpfc_hba * phba, struct lpfc_sli_ring * pring, struct lpfc_iocbq * iocbq) { IOCB_t *icmd; uint16_t evt_code; uint16_t temp; struct temp_event temp_event_data; struct Scsi_Host *shost; icmd = &iocbq->iocb; evt_code = icmd->un.asyncstat.evt_code; temp = icmd->ulpContext; if ((evt_code != ASYNC_TEMP_WARN) && (evt_code != ASYNC_TEMP_SAFE)) { lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0346 Ring %d handler: unexpected ASYNC_STATUS" " evt_code 0x%x\n", pring->ringno, icmd->un.asyncstat.evt_code); return; } temp_event_data.data = (uint32_t)temp; temp_event_data.event_type = FC_REG_TEMPERATURE_EVENT; if (evt_code == ASYNC_TEMP_WARN) { temp_event_data.event_code = LPFC_THRESHOLD_TEMP; lpfc_printf_log(phba, KERN_ERR, LOG_TEMP, "0347 Adapter is very hot, please take " "corrective action. temperature : %d Celsius\n", temp); } if (evt_code == ASYNC_TEMP_SAFE) { temp_event_data.event_code = LPFC_NORMAL_TEMP; lpfc_printf_log(phba, KERN_ERR, LOG_TEMP, "0340 Adapter temperature is OK now. " "temperature : %d Celsius\n", temp); } /* Send temperature change event to applications */ shost = lpfc_shost_from_vport(phba->pport); fc_host_post_vendor_event(shost, fc_get_event_number(), sizeof(temp_event_data), (char *) &temp_event_data, LPFC_NL_VENDOR_ID); } /** * lpfc_sli_setup: SLI ring setup function. * @phba: Pointer to HBA context object. * * lpfc_sli_setup sets up rings of the SLI interface with * number of iocbs per ring and iotags. This function is * called while driver attach to the HBA and before the * interrupts are enabled. So there is no need for locking. * * This function always returns 0. **/ int lpfc_sli_setup(struct lpfc_hba *phba) { int i, totiocbsize = 0; struct lpfc_sli *psli = &phba->sli; struct lpfc_sli_ring *pring; psli->num_rings = MAX_CONFIGURED_RINGS; psli->sli_flag = 0; psli->fcp_ring = LPFC_FCP_RING; psli->next_ring = LPFC_FCP_NEXT_RING; psli->extra_ring = LPFC_EXTRA_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) { case LPFC_FCP_RING: /* ring 0 - FCP */ /* numCiocb and numRiocb are used in config_port */ pring->numCiocb = SLI2_IOCB_CMD_R0_ENTRIES; pring->numRiocb = SLI2_IOCB_RSP_R0_ENTRIES; pring->numCiocb += SLI2_IOCB_CMD_R1XTRA_ENTRIES; pring->numRiocb += SLI2_IOCB_RSP_R1XTRA_ENTRIES; pring->numCiocb += SLI2_IOCB_CMD_R3XTRA_ENTRIES; pring->numRiocb += SLI2_IOCB_RSP_R3XTRA_ENTRIES; pring->sizeCiocb = (phba->sli_rev == 3) ? SLI3_IOCB_CMD_SIZE : SLI2_IOCB_CMD_SIZE; pring->sizeRiocb = (phba->sli_rev == 3) ? SLI3_IOCB_RSP_SIZE : SLI2_IOCB_RSP_SIZE; pring->iotag_ctr = 0; pring->iotag_max = (phba->cfg_hba_queue_depth * 2); pring->fast_iotag = pring->iotag_max; pring->num_mask = 0; break; case LPFC_EXTRA_RING: /* ring 1 - EXTRA */ /* numCiocb and numRiocb are used in config_port */ pring->numCiocb = SLI2_IOCB_CMD_R1_ENTRIES; pring->numRiocb = SLI2_IOCB_RSP_R1_ENTRIES; pring->sizeCiocb = (phba->sli_rev == 3) ? SLI3_IOCB_CMD_SIZE : SLI2_IOCB_CMD_SIZE; pring->sizeRiocb = (phba->sli_rev == 3) ? SLI3_IOCB_RSP_SIZE : SLI2_IOCB_RSP_SIZE; pring->iotag_max = phba->cfg_hba_queue_depth; pring->num_mask = 0; break; case LPFC_ELS_RING: /* ring 2 - ELS / CT */ /* numCiocb and numRiocb are used in config_port */ pring->numCiocb = SLI2_IOCB_CMD_R2_ENTRIES; pring->numRiocb = SLI2_IOCB_RSP_R2_ENTRIES; pring->sizeCiocb = (phba->sli_rev == 3) ? SLI3_IOCB_CMD_SIZE : SLI2_IOCB_CMD_SIZE; pring->sizeRiocb = (phba->sli_rev == 3) ? SLI3_IOCB_RSP_SIZE : SLI2_IOCB_RSP_SIZE; pring->fast_iotag = 0; pring->iotag_ctr = 0; pring->iotag_max = 4096; pring->lpfc_sli_rcv_async_status = lpfc_sli_async_event_handler; pring->num_mask = 4; pring->prt[0].profile = 0; /* Mask 0 */ pring->prt[0].rctl = FC_ELS_REQ; pring->prt[0].type = FC_ELS_DATA; pring->prt[0].lpfc_sli_rcv_unsol_event = lpfc_els_unsol_event; pring->prt[1].profile = 0; /* Mask 1 */ pring->prt[1].rctl = FC_ELS_RSP; pring->prt[1].type = FC_ELS_DATA; pring->prt[1].lpfc_sli_rcv_unsol_event = lpfc_els_unsol_event; pring->prt[2].profile = 0; /* Mask 2 */ /* NameServer Inquiry */ pring->prt[2].rctl = FC_UNSOL_CTL; /* NameServer */ pring->prt[2].type = FC_COMMON_TRANSPORT_ULP; pring->prt[2].lpfc_sli_rcv_unsol_event = lpfc_ct_unsol_event; pring->prt[3].profile = 0; /* Mask 3 */ /* NameServer response */ pring->prt[3].rctl = FC_SOL_CTL; /* NameServer */ pring->prt[3].type = FC_COMMON_TRANSPORT_ULP; pring->prt[3].lpfc_sli_rcv_unsol_event = lpfc_ct_unsol_event; break; } totiocbsize += (pring->numCiocb * pring->sizeCiocb) + (pring->numRiocb * pring->sizeRiocb); } if (totiocbsize > MAX_SLIM_IOCB_SIZE) { /* Too many cmd / rsp ring entries in SLI2 SLIM */ printk(KERN_ERR "%d:0462 Too many cmd / rsp ring entries in " "SLI2 SLIM Data: x%x x%lx\n", phba->brd_no, totiocbsize, (unsigned long) MAX_SLIM_IOCB_SIZE); } if (phba->cfg_multi_ring_support == 2) lpfc_extra_ring_setup(phba); return 0; } /** * lpfc_sli_queue_setup: Queue initialization function. * @phba: Pointer to HBA context object. * * lpfc_sli_queue_setup sets up mailbox queues and iocb queues for each * ring. This function also initializes ring indices of each ring. * This function is called during the initialization of the SLI * interface of an HBA. * This function is called with no lock held and always returns * 1. **/ int lpfc_sli_queue_setup(struct lpfc_hba *phba) { struct lpfc_sli *psli; struct lpfc_sli_ring *pring; int i; psli = &phba->sli; spin_lock_irq(&phba->hbalock); INIT_LIST_HEAD(&psli->mboxq); INIT_LIST_HEAD(&psli->mboxq_cmpl); /* Initialize list headers for txq and txcmplq as double linked lists */ for (i = 0; i < psli->num_rings; i++) { pring = &psli->ring[i]; pring->ringno = i; pring->next_cmdidx = 0; pring->local_getidx = 0; pring->cmdidx = 0; INIT_LIST_HEAD(&pring->txq); INIT_LIST_HEAD(&pring->txcmplq); INIT_LIST_HEAD(&pring->iocb_continueq); INIT_LIST_HEAD(&pring->iocb_continue_saveq); INIT_LIST_HEAD(&pring->postbufq); } spin_unlock_irq(&phba->hbalock); return 1; } /** * lpfc_sli_host_down: Vport cleanup function. * @vport: Pointer to virtual port object. * * lpfc_sli_host_down is called to clean up the resources * associated with a vport before destroying virtual * port data structures. * This function does following operations: * - Free discovery resources associated with this virtual * port. * - Free iocbs associated with this virtual port in * the txq. * - Send abort for all iocb commands associated with this * vport in txcmplq. * * This function is called with no lock held and always returns 1. **/ int lpfc_sli_host_down(struct lpfc_vport *vport) { LIST_HEAD(completions); struct lpfc_hba *phba = vport->phba; struct lpfc_sli *psli = &phba->sli; struct lpfc_sli_ring *pring; struct lpfc_iocbq *iocb, *next_iocb; int i; unsigned long flags = 0; uint16_t prev_pring_flag; lpfc_cleanup_discovery_resources(vport); spin_lock_irqsave(&phba->hbalock, flags); for (i = 0; i < psli->num_rings; i++) { pring = &psli->ring[i]; prev_pring_flag = pring->flag; /* Only slow rings */ if (pring->ringno == LPFC_ELS_RING) { pring->flag |= LPFC_DEFERRED_RING_EVENT; /* Set the lpfc data pending flag */ set_bit(LPFC_DATA_READY, &phba->data_flags); } /* * Error everything on the txq since these iocbs have not been * given to the FW yet. */ list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) { if (iocb->vport != vport) continue; list_move_tail(&iocb->list, &completions); pring->txq_cnt--; } /* Next issue ABTS for everything on the txcmplq */ list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) { if (iocb->vport != vport) continue; lpfc_sli_issue_abort_iotag(phba, pring, iocb); } pring->flag = prev_pring_flag; } spin_unlock_irqrestore(&phba->hbalock, flags); while (!list_empty(&completions)) { list_remove_head(&completions, iocb, struct lpfc_iocbq, list); if (!iocb->iocb_cmpl) lpfc_sli_release_iocbq(phba, iocb); else { iocb->iocb.ulpStatus = IOSTAT_LOCAL_REJECT; iocb->iocb.un.ulpWord[4] = IOERR_SLI_DOWN; (iocb->iocb_cmpl) (phba, iocb, iocb); } } return 1; } /** * lpfc_sli_hba_down: Resource cleanup function for the HBA. * @phba: Pointer to HBA context object. * * This function cleans up all iocb, buffers, mailbox commands * while shutting down the HBA. This function is called with no * lock held and always returns 1. * This function does the following to cleanup driver resources: * - Free discovery resources for each virtual port * - Cleanup any pending fabric iocbs * - Iterate through the iocb txq and free each entry * in the list. * - Free up any buffer posted to the HBA * - Free mailbox commands in the mailbox queue. **/ int lpfc_sli_hba_down(struct lpfc_hba *phba) { LIST_HEAD(completions); struct lpfc_sli *psli = &phba->sli; struct lpfc_sli_ring *pring; struct lpfc_dmabuf *buf_ptr; LPFC_MBOXQ_t *pmb; struct lpfc_iocbq *iocb; IOCB_t *cmd = NULL; int i; unsigned long flags = 0; lpfc_hba_down_prep(phba); lpfc_fabric_abort_hba(phba); spin_lock_irqsave(&phba->hbalock, flags); for (i = 0; i < psli->num_rings; i++) { pring = &psli->ring[i]; /* Only slow rings */ if (pring->ringno == LPFC_ELS_RING) { pring->flag |= LPFC_DEFERRED_RING_EVENT; /* Set the lpfc data pending flag */ set_bit(LPFC_DATA_READY, &phba->data_flags); } /* * Error everything on the txq since these iocbs have not been * given to the FW yet. */ list_splice_init(&pring->txq, &completions); pring->txq_cnt = 0; } spin_unlock_irqrestore(&phba->hbalock, flags); while (!list_empty(&completions)) { list_remove_head(&completions, iocb, struct lpfc_iocbq, list); cmd = &iocb->iocb; if (!iocb->iocb_cmpl) lpfc_sli_release_iocbq(phba, iocb); else { cmd->ulpStatus = IOSTAT_LOCAL_REJECT; cmd->un.ulpWord[4] = IOERR_SLI_DOWN; (iocb->iocb_cmpl) (phba, iocb, iocb); } } spin_lock_irqsave(&phba->hbalock, flags); list_splice_init(&phba->elsbuf, &completions); phba->elsbuf_cnt = 0; phba->elsbuf_prev_cnt = 0; spin_unlock_irqrestore(&phba->hbalock, flags); while (!list_empty(&completions)) { list_remove_head(&completions, buf_ptr, struct lpfc_dmabuf, list); lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys); kfree(buf_ptr); } /* Return any active mbox cmds */ del_timer_sync(&psli->mbox_tmo); spin_lock_irqsave(&phba->hbalock, flags); spin_lock(&phba->pport->work_port_lock); phba->pport->work_port_events &= ~WORKER_MBOX_TMO; spin_unlock(&phba->pport->work_port_lock); /* Return any pending or completed mbox cmds */ list_splice_init(&phba->sli.mboxq, &completions); if (psli->mbox_active) { list_add_tail(&psli->mbox_active->list, &completions); psli->mbox_active = NULL; psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; } list_splice_init(&phba->sli.mboxq_cmpl, &completions); spin_unlock_irqrestore(&phba->hbalock, flags); while (!list_empty(&completions)) { list_remove_head(&completions, pmb, LPFC_MBOXQ_t, list); pmb->mb.mbxStatus = MBX_NOT_FINISHED; if (pmb->mbox_cmpl) pmb->mbox_cmpl(phba,pmb); } return 1; } /** * lpfc_sli_pcimem_bcopy: SLI memory copy function. * @srcp: Source memory pointer. * @destp: Destination memory pointer. * @cnt: Number of words required to be copied. * * This function is used for copying data between driver memory * and the SLI memory. This function also changes the endianness * of each word if native endianness is different from SLI * endianness. This function can be called with or without * lock. **/ void lpfc_sli_pcimem_bcopy(void *srcp, void *destp, uint32_t cnt) { uint32_t *src = srcp; uint32_t *dest = destp; uint32_t ldata; int i; for (i = 0; i < (int)cnt; i += sizeof (uint32_t)) { ldata = *src; ldata = le32_to_cpu(ldata); *dest = ldata; src++; dest++; } } /** * lpfc_sli_ringpostbuf_put: Function to add a buffer to postbufq. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @mp: Pointer to driver buffer object. * * This function is called with no lock held. * It always return zero after adding the buffer to the postbufq * buffer list. **/ int lpfc_sli_ringpostbuf_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_dmabuf *mp) { /* Stick struct lpfc_dmabuf at end of postbufq so driver can look it up later */ spin_lock_irq(&phba->hbalock); list_add_tail(&mp->list, &pring->postbufq); pring->postbufq_cnt++; spin_unlock_irq(&phba->hbalock); return 0; } /** * lpfc_sli_get_buffer_tag: Tag allocation function for a buffer posted * using CMD_QUE_XRI64_CX iocb. * @phba: Pointer to HBA context object. * * When HBQ is enabled, buffers are searched based on tags. This function * allocates a tag for buffer posted using CMD_QUE_XRI64_CX iocb. The * tag is bit wise or-ed with QUE_BUFTAG_BIT to make sure that the tag * does not conflict with tags of buffer posted for unsolicited events. * The function returns the allocated tag. The function is called with * no locks held. **/ uint32_t lpfc_sli_get_buffer_tag(struct lpfc_hba *phba) { spin_lock_irq(&phba->hbalock); phba->buffer_tag_count++; /* * Always set the QUE_BUFTAG_BIT to distiguish between * a tag assigned by HBQ. */ phba->buffer_tag_count |= QUE_BUFTAG_BIT; spin_unlock_irq(&phba->hbalock); return phba->buffer_tag_count; } /** * lpfc_sli_ring_taggedbuf_get: Search HBQ buffer associated with * posted using CMD_QUE_XRI64_CX iocb. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @tag: Buffer tag. * * Buffers posted using CMD_QUE_XRI64_CX iocb are in pring->postbufq * list. After HBA DMA data to these buffers, CMD_IOCB_RET_XRI64_CX * iocb is posted to the response ring with the tag of the buffer. * This function searches the pring->postbufq list using the tag * to find buffer associated with CMD_IOCB_RET_XRI64_CX * iocb. If the buffer is found then lpfc_dmabuf object of the * buffer is returned to the caller else NULL is returned. * This function is called with no lock held. **/ struct lpfc_dmabuf * lpfc_sli_ring_taggedbuf_get(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, uint32_t tag) { struct lpfc_dmabuf *mp, *next_mp; struct list_head *slp = &pring->postbufq; /* Search postbufq, from the begining, looking for a match on tag */ spin_lock_irq(&phba->hbalock); list_for_each_entry_safe(mp, next_mp, &pring->postbufq, list) { if (mp->buffer_tag == tag) { list_del_init(&mp->list); pring->postbufq_cnt--; spin_unlock_irq(&phba->hbalock); return mp; } } spin_unlock_irq(&phba->hbalock); lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "0402 Cannot find virtual addr for buffer tag on " "ring %d Data x%lx x%p x%p x%x\n", pring->ringno, (unsigned long) tag, slp->next, slp->prev, pring->postbufq_cnt); return NULL; } /** * lpfc_sli_ringpostbuf_get: SLI2 buffer search function for * unsolicited ct and els events. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @phys: DMA address of the buffer. * * This function searches the buffer list using the dma_address * of unsolicited event to find the driver's lpfc_dmabuf object * corresponding to the dma_address. The function returns the * lpfc_dmabuf object if a buffer is found else it returns NULL. * This function is called by the ct and els unsolicited event * handlers to get the buffer associated with the unsolicited * event. * * This function is called with no lock held. **/ struct lpfc_dmabuf * lpfc_sli_ringpostbuf_get(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, dma_addr_t phys) { struct lpfc_dmabuf *mp, *next_mp; struct list_head *slp = &pring->postbufq; /* Search postbufq, from the begining, looking for a match on phys */ spin_lock_irq(&phba->hbalock); list_for_each_entry_safe(mp, next_mp, &pring->postbufq, list) { if (mp->phys == phys) { list_del_init(&mp->list); pring->postbufq_cnt--; spin_unlock_irq(&phba->hbalock); return mp; } } spin_unlock_irq(&phba->hbalock); lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "0410 Cannot find virtual addr for mapped buf on " "ring %d Data x%llx x%p x%p x%x\n", pring->ringno, (unsigned long long)phys, slp->next, slp->prev, pring->postbufq_cnt); return NULL; } /** * lpfc_sli_abort_els_cmpl: Completion handler for the els abort iocbs. * @phba: Pointer to HBA context object. * @cmdiocb: Pointer to driver command iocb object. * @rspiocb: Pointer to driver response iocb object. * * This function is the completion handler for the abort iocbs for * ELS commands. This function is called from the ELS ring event * handler with no lock held. This function frees memory resources * associated with the abort iocb. **/ static void lpfc_sli_abort_els_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, struct lpfc_iocbq *rspiocb) { IOCB_t *irsp = &rspiocb->iocb; uint16_t abort_iotag, abort_context; struct lpfc_iocbq *abort_iocb; struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; abort_iocb = NULL; if (irsp->ulpStatus) { abort_context = cmdiocb->iocb.un.acxri.abortContextTag; abort_iotag = cmdiocb->iocb.un.acxri.abortIoTag; spin_lock_irq(&phba->hbalock); if (abort_iotag != 0 && abort_iotag <= phba->sli.last_iotag) abort_iocb = phba->sli.iocbq_lookup[abort_iotag]; lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_SLI, "0327 Cannot abort els iocb %p " "with tag %x context %x, abort status %x, " "abort code %x\n", abort_iocb, abort_iotag, abort_context, irsp->ulpStatus, irsp->un.ulpWord[4]); /* * If the iocb is not found in Firmware queue the iocb * might have completed already. Do not free it again. */ if (irsp->ulpStatus == IOSTAT_LOCAL_REJECT) { spin_unlock_irq(&phba->hbalock); lpfc_sli_release_iocbq(phba, cmdiocb); return; } /* * make sure we have the right iocbq before taking it * off the txcmplq and try to call completion routine. */ if (!abort_iocb || abort_iocb->iocb.ulpContext != abort_context || (abort_iocb->iocb_flag & LPFC_DRIVER_ABORTED) == 0) spin_unlock_irq(&phba->hbalock); else { list_del_init(&abort_iocb->list); pring->txcmplq_cnt--; spin_unlock_irq(&phba->hbalock); /* Firmware could still be in progress of DMAing * payload, so don't free data buffer till after * a hbeat. */ abort_iocb->iocb_flag |= LPFC_DELAY_MEM_FREE; abort_iocb->iocb_flag &= ~LPFC_DRIVER_ABORTED; abort_iocb->iocb.ulpStatus = IOSTAT_LOCAL_REJECT; abort_iocb->iocb.un.ulpWord[4] = IOERR_SLI_ABORTED; (abort_iocb->iocb_cmpl)(phba, abort_iocb, abort_iocb); } } lpfc_sli_release_iocbq(phba, cmdiocb); return; } /** * lpfc_ignore_els_cmpl: Completion handler for aborted ELS command. * @phba: Pointer to HBA context object. * @cmdiocb: Pointer to driver command iocb object. * @rspiocb: Pointer to driver response iocb object. * * The function is called from SLI ring event handler with no * lock held. This function is the completion handler for ELS commands * which are aborted. The function frees memory resources used for * the aborted ELS commands. **/ static void lpfc_ignore_els_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, struct lpfc_iocbq *rspiocb) { IOCB_t *irsp = &rspiocb->iocb; /* ELS cmd tag completes */ lpfc_printf_log(phba, KERN_INFO, LOG_ELS, "0139 Ignoring ELS cmd tag x%x completion Data: " "x%x x%x x%x\n", irsp->ulpIoTag, irsp->ulpStatus, irsp->un.ulpWord[4], irsp->ulpTimeout); if (cmdiocb->iocb.ulpCommand == CMD_GEN_REQUEST64_CR) lpfc_ct_free_iocb(phba, cmdiocb); else lpfc_els_free_iocb(phba, cmdiocb); return; } /** * lpfc_sli_issue_abort_iotag: Abort function for a command iocb. * @phba: Pointer to HBA context object. * @pring: Pointer to driver SLI ring object. * @cmdiocb: Pointer to driver command iocb object. * * This function issues an abort iocb for the provided command * iocb. This function is called with hbalock held. * The function returns 0 when it fails due to memory allocation * failure or when the command iocb is an abort request. **/ int lpfc_sli_issue_abort_iotag(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *cmdiocb) { struct lpfc_vport *vport = cmdiocb->vport; struct lpfc_iocbq *abtsiocbp; IOCB_t *icmd = NULL; IOCB_t *iabt = NULL; int retval = IOCB_ERROR; /* * There are certain command types we don't want to abort. And we * don't want to abort commands that are already in the process of * being aborted. */ icmd = &cmdiocb->iocb; if (icmd->ulpCommand == CMD_ABORT_XRI_CN || icmd->ulpCommand == CMD_CLOSE_XRI_CN || (cmdiocb->iocb_flag & LPFC_DRIVER_ABORTED) != 0) return 0; /* If we're unloading, don't abort iocb on the ELS ring, but change the * callback so that nothing happens when it finishes. */ if ((vport->load_flag & FC_UNLOADING) && (pring->ringno == LPFC_ELS_RING)) { if (cmdiocb->iocb_flag & LPFC_IO_FABRIC) cmdiocb->fabric_iocb_cmpl = lpfc_ignore_els_cmpl; else cmdiocb->iocb_cmpl = lpfc_ignore_els_cmpl; goto abort_iotag_exit; } /* issue ABTS for this IOCB based on iotag */ abtsiocbp = __lpfc_sli_get_iocbq(phba); if (abtsiocbp == NULL) return 0; /* This signals the response to set the correct status * before calling the completion handler. */ cmdiocb->iocb_flag |= LPFC_DRIVER_ABORTED; iabt = &abtsiocbp->iocb; iabt->un.acxri.abortType = ABORT_TYPE_ABTS; iabt->un.acxri.abortContextTag = icmd->ulpContext; iabt->un.acxri.abortIoTag = icmd->ulpIoTag; iabt->ulpLe = 1; iabt->ulpClass = icmd->ulpClass; if (phba->link_state >= LPFC_LINK_UP) iabt->ulpCommand = CMD_ABORT_XRI_CN; else iabt->ulpCommand = CMD_CLOSE_XRI_CN; abtsiocbp->iocb_cmpl = lpfc_sli_abort_els_cmpl; lpfc_printf_vlog(vport, KERN_INFO, LOG_SLI, "0339 Abort xri x%x, original iotag x%x, " "abort cmd iotag x%x\n", iabt->un.acxri.abortContextTag, iabt->un.acxri.abortIoTag, abtsiocbp->iotag); retval = __lpfc_sli_issue_iocb(phba, pring, abtsiocbp, 0); if (retval) __lpfc_sli_release_iocbq(phba, abtsiocbp); abort_iotag_exit: /* * Caller to this routine should check for IOCB_ERROR * and handle it properly. This routine no longer removes * iocb off txcmplq and call compl in case of IOCB_ERROR. */ return retval; } /** * lpfc_sli_validate_fcp_iocb: Filtering function, used to find commands * associated with a vport/SCSI target/lun. * @iocbq: Pointer to driver iocb object. * @vport: Pointer to driver virtual port object. * @tgt_id: SCSI ID of the target. * @lun_id: LUN ID of the scsi device. * @ctx_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST * * This function acts as iocb filter for functions which abort or count * all FCP iocbs pending on a lun/SCSI target/SCSI host. It will return * 0 if the filtering criteria is met for the given iocb and will return * 1 if the filtering criteria is not met. * If ctx_cmd == LPFC_CTX_LUN, the function returns 0 only if the * given iocb is for the SCSI device specified by vport, tgt_id and * lun_id parameter. * If ctx_cmd == LPFC_CTX_TGT, the function returns 0 only if the * given iocb is for the SCSI target specified by vport and tgt_id * parameters. * If ctx_cmd == LPFC_CTX_HOST, the function returns 0 only if the * given iocb is for the SCSI host associated with the given vport. * This function is called with no locks held. **/ static int lpfc_sli_validate_fcp_iocb(struct lpfc_iocbq *iocbq, struct lpfc_vport *vport, uint16_t tgt_id, uint64_t lun_id, lpfc_ctx_cmd ctx_cmd) { struct lpfc_scsi_buf *lpfc_cmd; int rc = 1; if (!(iocbq->iocb_flag & LPFC_IO_FCP)) return rc; if (iocbq->vport != vport) return rc; lpfc_cmd = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); if (lpfc_cmd->pCmd == NULL) return rc; switch (ctx_cmd) { case LPFC_CTX_LUN: if ((lpfc_cmd->rdata->pnode) && (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id) && (scsilun_to_int(&lpfc_cmd->fcp_cmnd->fcp_lun) == lun_id)) rc = 0; break; case LPFC_CTX_TGT: if ((lpfc_cmd->rdata->pnode) && (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id)) rc = 0; break; case LPFC_CTX_HOST: rc = 0; break; default: printk(KERN_ERR "%s: Unknown context cmd type, value %d\n", __func__, ctx_cmd); break; } return rc; } /** * lpfc_sli_sum_iocb: Function to count the number of FCP iocbs pending. * @vport: Pointer to virtual port. * @tgt_id: SCSI ID of the target. * @lun_id: LUN ID of the scsi device. * @ctx_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST. * * This function returns number of FCP commands pending for the vport. * When ctx_cmd == LPFC_CTX_LUN, the function returns number of FCP * commands pending on the vport associated with SCSI device specified * by tgt_id and lun_id parameters. * When ctx_cmd == LPFC_CTX_TGT, the function returns number of FCP * commands pending on the vport associated with SCSI target specified * by tgt_id parameter. * When ctx_cmd == LPFC_CTX_HOST, the function returns number of FCP * commands pending on the vport. * This function returns the number of iocbs which satisfy the filter. * This function is called without any lock held. **/ int lpfc_sli_sum_iocb(struct lpfc_vport *vport, uint16_t tgt_id, uint64_t lun_id, lpfc_ctx_cmd ctx_cmd) { struct lpfc_hba *phba = vport->phba; struct lpfc_iocbq *iocbq; int sum, i; for (i = 1, sum = 0; i <= phba->sli.last_iotag; i++) { iocbq = phba->sli.iocbq_lookup[i]; if (lpfc_sli_validate_fcp_iocb (iocbq, vport, tgt_id, lun_id, ctx_cmd) == 0) sum++; } return sum; } /** * lpfc_sli_abort_fcp_cmpl: Completion handler function for an aborted * FCP iocb. * @phba: Pointer to HBA context object * @cmdiocb: Pointer to command iocb object. * @rspiocb: Pointer to response iocb object. * * This function is called when an aborted FCP iocb completes. This * function is called by the ring event handler with no lock held. * This function frees the iocb. **/ void lpfc_sli_abort_fcp_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, struct lpfc_iocbq *rspiocb) { lpfc_sli_release_iocbq(phba, cmdiocb); return; } /** * lpfc_sli_abort_iocb: This function issue abort for all SCSI commands * pending on a SCSI host(vport)/target/lun. * @vport: Pointer to virtual port. * @pring: Pointer to driver SLI ring object. * @tgt_id: SCSI ID of the target. * @lun_id: LUN ID of the scsi device. * @abort_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST. * * This function sends an abort command for every SCSI command * associated with the given virtual port pending on the ring * filtered by lpfc_sli_validate_fcp_iocb function. * When abort_cmd == LPFC_CTX_LUN, the function sends abort only to the * FCP iocbs associated with lun specified by tgt_id and lun_id * parameters * When abort_cmd == LPFC_CTX_TGT, the function sends abort only to the * FCP iocbs associated with SCSI target specified by tgt_id parameter. * When abort_cmd == LPFC_CTX_HOST, the function sends abort to all * FCP iocbs associated with virtual port. * This function returns number of iocbs it failed to abort. * This function is called with no locks held. **/ int lpfc_sli_abort_iocb(struct lpfc_vport *vport, struct lpfc_sli_ring *pring, uint16_t tgt_id, uint64_t lun_id, lpfc_ctx_cmd abort_cmd) { struct lpfc_hba *phba = vport->phba; struct lpfc_iocbq *iocbq; struct lpfc_iocbq *abtsiocb; IOCB_t *cmd = NULL; int errcnt = 0, ret_val = 0; int i; for (i = 1; i <= phba->sli.last_iotag; i++) { iocbq = phba->sli.iocbq_lookup[i]; if (lpfc_sli_validate_fcp_iocb(iocbq, vport, tgt_id, lun_id, abort_cmd) != 0) continue; /* issue ABTS for this IOCB based on iotag */ abtsiocb = lpfc_sli_get_iocbq(phba); if (abtsiocb == NULL) { errcnt++; continue; } cmd = &iocbq->iocb; abtsiocb->iocb.un.acxri.abortType = ABORT_TYPE_ABTS; abtsiocb->iocb.un.acxri.abortContextTag = cmd->ulpContext; abtsiocb->iocb.un.acxri.abortIoTag = cmd->ulpIoTag; abtsiocb->iocb.ulpLe = 1; abtsiocb->iocb.ulpClass = cmd->ulpClass; abtsiocb->vport = phba->pport; if (lpfc_is_link_up(phba)) abtsiocb->iocb.ulpCommand = CMD_ABORT_XRI_CN; else abtsiocb->iocb.ulpCommand = CMD_CLOSE_XRI_CN; /* Setup callback routine and issue the command. */ abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; ret_val = lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0); if (ret_val == IOCB_ERROR) { lpfc_sli_release_iocbq(phba, abtsiocb); errcnt++; continue; } } return errcnt; } /** * lpfc_sli_wake_iocb_wait: iocb completion handler for iocb issued using * lpfc_sli_issue_iocb_wait. * @phba: Pointer to HBA context object. * @cmdiocbq: Pointer to command iocb. * @rspiocbq: Pointer to response iocb. * * This function is the completion handler for iocbs issued using * lpfc_sli_issue_iocb_wait function. This function is called by the * ring event handler function without any lock held. This function * can be called from both worker thread context and interrupt * context. This function also can be called from other thread which * cleans up the SLI layer objects. * This function copy the contents of the response iocb to the * response iocb memory object provided by the caller of * lpfc_sli_issue_iocb_wait and then wakes up the thread which * sleeps for the iocb completion. **/ static void lpfc_sli_wake_iocb_wait(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocbq, struct lpfc_iocbq *rspiocbq) { wait_queue_head_t *pdone_q; unsigned long iflags; spin_lock_irqsave(&phba->hbalock, iflags); cmdiocbq->iocb_flag |= LPFC_IO_WAKE; if (cmdiocbq->context2 && rspiocbq) memcpy(&((struct lpfc_iocbq *)cmdiocbq->context2)->iocb, &rspiocbq->iocb, sizeof(IOCB_t)); pdone_q = cmdiocbq->context_un.wait_queue; if (pdone_q) wake_up(pdone_q); spin_unlock_irqrestore(&phba->hbalock, iflags); return; } /** * lpfc_sli_issue_iocb_wait: Synchronous function to issue iocb commands. * @phba: Pointer to HBA context object.. * @pring: Pointer to sli ring. * @piocb: Pointer to command iocb. * @prspiocbq: Pointer to response iocb. * @timeout: Timeout in number of seconds. * * This function issues the iocb to firmware and waits for the * iocb to complete. If the iocb command is not * completed within timeout seconds, it returns IOCB_TIMEDOUT. * Caller should not free the iocb resources if this function * returns IOCB_TIMEDOUT. * The function waits for the iocb completion using an * non-interruptible wait. * This function will sleep while waiting for iocb completion. * So, this function should not be called from any context which * does not allow sleeping. Due to the same reason, this function * cannot be called with interrupt disabled. * This function assumes that the iocb completions occur while * this function sleep. So, this function cannot be called from * the thread which process iocb completion for this ring. * This function clears the iocb_flag of the iocb object before * issuing the iocb and the iocb completion handler sets this * flag and wakes this thread when the iocb completes. * The contents of the response iocb will be copied to prspiocbq * by the completion handler when the command completes. * This function returns IOCB_SUCCESS when success. * This function is called with no lock held. **/ int lpfc_sli_issue_iocb_wait(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *piocb, struct lpfc_iocbq *prspiocbq, uint32_t timeout) { DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_q); long timeleft, timeout_req = 0; int retval = IOCB_SUCCESS; uint32_t creg_val; /* * If the caller has provided a response iocbq buffer, then context2 * is NULL or its an error. */ if (prspiocbq) { if (piocb->context2) return IOCB_ERROR; piocb->context2 = prspiocbq; } piocb->iocb_cmpl = lpfc_sli_wake_iocb_wait; piocb->context_un.wait_queue = &done_q; piocb->iocb_flag &= ~LPFC_IO_WAKE; if (phba->cfg_poll & DISABLE_FCP_RING_INT) { creg_val = readl(phba->HCregaddr); creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING); writel(creg_val, phba->HCregaddr); readl(phba->HCregaddr); /* flush */ } retval = lpfc_sli_issue_iocb(phba, pring, piocb, 0); if (retval == IOCB_SUCCESS) { timeout_req = timeout * HZ; timeleft = wait_event_timeout(done_q, piocb->iocb_flag & LPFC_IO_WAKE, timeout_req); if (piocb->iocb_flag & LPFC_IO_WAKE) { lpfc_printf_log(phba, KERN_INFO, LOG_SLI, "0331 IOCB wake signaled\n"); } else if (timeleft == 0) { lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0338 IOCB wait timeout error - no " "wake response Data x%x\n", timeout); retval = IOCB_TIMEDOUT; } else { lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "0330 IOCB wake NOT set, " "Data x%x x%lx\n", timeout, (timeleft / jiffies)); retval = IOCB_TIMEDOUT; } } else { lpfc_printf_log(phba, KERN_INFO, LOG_SLI, "0332 IOCB wait issue failed, Data x%x\n", retval); retval = IOCB_ERROR; } if (phba->cfg_poll & DISABLE_FCP_RING_INT) { creg_val = readl(phba->HCregaddr); creg_val &= ~(HC_R0INT_ENA << LPFC_FCP_RING); writel(creg_val, phba->HCregaddr); readl(phba->HCregaddr); /* flush */ } if (prspiocbq) piocb->context2 = NULL; piocb->context_un.wait_queue = NULL; piocb->iocb_cmpl = NULL; return retval; } /** * lpfc_sli_issue_mbox_wait: Synchronous function to issue mailbox. * @phba: Pointer to HBA context object. * @pmboxq: Pointer to driver mailbox object. * @timeout: Timeout in number of seconds. * * This function issues the mailbox to firmware and waits for the * mailbox command to complete. If the mailbox command is not * completed within timeout seconds, it returns MBX_TIMEOUT. * The function waits for the mailbox completion using an * interruptible wait. If the thread is woken up due to a * signal, MBX_TIMEOUT error is returned to the caller. Caller * should not free the mailbox resources, if this function returns * MBX_TIMEOUT. * This function will sleep while waiting for mailbox completion. * So, this function should not be called from any context which * does not allow sleeping. Due to the same reason, this function * cannot be called with interrupt disabled. * This function assumes that the mailbox completion occurs while * this function sleep. So, this function cannot be called from * the worker thread which processes mailbox completion. * This function is called in the context of HBA management * applications. * This function returns MBX_SUCCESS when successful. * This function is called with no lock held. **/ int lpfc_sli_issue_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq, uint32_t timeout) { DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_q); int retval; unsigned long flag; /* The caller must leave context1 empty. */ if (pmboxq->context1) return MBX_NOT_FINISHED; pmboxq->mbox_flag &= ~LPFC_MBX_WAKE; /* setup wake call as IOCB callback */ pmboxq->mbox_cmpl = lpfc_sli_wake_mbox_wait; /* setup context field to pass wait_queue pointer to wake function */ pmboxq->context1 = &done_q; /* now issue the command */ retval = lpfc_sli_issue_mbox(phba, pmboxq, MBX_NOWAIT); if (retval == MBX_BUSY || retval == MBX_SUCCESS) { wait_event_interruptible_timeout(done_q, pmboxq->mbox_flag & LPFC_MBX_WAKE, timeout * HZ); spin_lock_irqsave(&phba->hbalock, flag); pmboxq->context1 = NULL; /* * if LPFC_MBX_WAKE flag is set the mailbox is completed * else do not free the resources. */ if (pmboxq->mbox_flag & LPFC_MBX_WAKE) retval = MBX_SUCCESS; else { retval = MBX_TIMEOUT; pmboxq->mbox_cmpl = lpfc_sli_def_mbox_cmpl; } spin_unlock_irqrestore(&phba->hbalock, flag); } return retval; } /** * lpfc_sli_flush_mbox_queue: mailbox queue cleanup function. * @phba: Pointer to HBA context. * * This function is called to cleanup any pending mailbox * objects in the driver queue before bringing the HBA offline. * This function is called while resetting the HBA. * The function is called without any lock held. The function * takes hbalock to update SLI data structure. * This function returns 1 when there is an active mailbox * command pending else returns 0. **/ int lpfc_sli_flush_mbox_queue(struct lpfc_hba * phba) { struct lpfc_vport *vport = phba->pport; int i = 0; uint32_t ha_copy; while (phba->sli.sli_flag & LPFC_SLI_MBOX_ACTIVE && !vport->stopped) { if (i++ > LPFC_MBOX_TMO * 1000) return 1; /* * Call lpfc_sli_handle_mb_event only if a mailbox cmd * did finish. This way we won't get the misleading * "Stray Mailbox Interrupt" message. */ spin_lock_irq(&phba->hbalock); ha_copy = phba->work_ha; phba->work_ha &= ~HA_MBATT; spin_unlock_irq(&phba->hbalock); if (ha_copy & HA_MBATT) if (lpfc_sli_handle_mb_event(phba) == 0) i = 0; msleep(1); } return (phba->sli.sli_flag & LPFC_SLI_MBOX_ACTIVE) ? 1 : 0; } /** * lpfc_sli_check_eratt: check error attention events * @phba: Pointer to HBA context. * * This function is called form timer soft interrupt context to check HBA's * error attention register bit for error attention events. * * This fucntion returns 1 when there is Error Attention in the Host Attention * Register and returns 0 otherwise. **/ int lpfc_sli_check_eratt(struct lpfc_hba *phba) { uint32_t ha_copy; /* If PCI channel is offline, don't process it */ if (unlikely(pci_channel_offline(phba->pcidev))) return 0; /* If somebody is waiting to handle an eratt, don't process it * here. The brdkill function will do this. */ if (phba->link_flag & LS_IGNORE_ERATT) return 0; /* Check if interrupt handler handles this ERATT */ spin_lock_irq(&phba->hbalock); if (phba->hba_flag & HBA_ERATT_HANDLED) { /* Interrupt handler has handled ERATT */ spin_unlock_irq(&phba->hbalock); return 0; } /* Read chip Host Attention (HA) register */ ha_copy = readl(phba->HAregaddr); if (ha_copy & HA_ERATT) { /* Read host status register to retrieve error event */ lpfc_sli_read_hs(phba); /* Set the driver HA work bitmap */ phba->work_ha |= HA_ERATT; /* Indicate polling handles this ERATT */ phba->hba_flag |= HBA_ERATT_HANDLED; spin_unlock_irq(&phba->hbalock); return 1; } spin_unlock_irq(&phba->hbalock); return 0; } /** * lpfc_sp_intr_handler: The slow-path interrupt handler of lpfc driver. * @irq: Interrupt number. * @dev_id: The device context pointer. * * This function is directly called from the PCI layer as an interrupt * service routine when the device is enabled with MSI-X multi-message * interrupt mode and there are slow-path events in the HBA. However, * when the device is enabled with either MSI or Pin-IRQ interrupt mode, * this function is called as part of the device-level interrupt handler. * When the PCI slot is in error recovery or the HBA is undergoing * initialization, the interrupt handler will not process the interrupt. * The link attention and ELS ring attention events are handled by the * worker thread. The interrupt handler signals the worker thread and * and returns for these events. This function is called without any * lock held. It gets the hbalock to access and update SLI data * structures. * * This function returns IRQ_HANDLED when interrupt is handled else it * returns IRQ_NONE. **/ irqreturn_t lpfc_sp_intr_handler(int irq, void *dev_id) { struct lpfc_hba *phba; uint32_t ha_copy; uint32_t work_ha_copy; unsigned long status; unsigned long iflag; uint32_t control; MAILBOX_t *mbox, *pmbox; struct lpfc_vport *vport; struct lpfc_nodelist *ndlp; struct lpfc_dmabuf *mp; LPFC_MBOXQ_t *pmb; int rc; /* * Get the driver's phba structure from the dev_id and * assume the HBA is not interrupting. */ phba = (struct lpfc_hba *)dev_id; if (unlikely(!phba)) return IRQ_NONE; /* * Stuff needs to be attented to when this function is invoked as an * individual interrupt handler in MSI-X multi-message interrupt mode */ if (phba->intr_type == MSIX) { /* If the pci channel is offline, ignore all the interrupts */ if (unlikely(pci_channel_offline(phba->pcidev))) return IRQ_NONE; /* Update device-level interrupt statistics */ phba->sli.slistat.sli_intr++; /* Ignore all interrupts during initialization. */ if (unlikely(phba->link_state < LPFC_LINK_DOWN)) return IRQ_NONE; /* Need to read HA REG for slow-path events */ spin_lock_irqsave(&phba->hbalock, iflag); ha_copy = readl(phba->HAregaddr); /* If somebody is waiting to handle an eratt don't process it * here. The brdkill function will do this. */ if (phba->link_flag & LS_IGNORE_ERATT) ha_copy &= ~HA_ERATT; /* Check the need for handling ERATT in interrupt handler */ if (ha_copy & HA_ERATT) { if (phba->hba_flag & HBA_ERATT_HANDLED) /* ERATT polling has handled ERATT */ ha_copy &= ~HA_ERATT; else /* Indicate interrupt handler handles ERATT */ phba->hba_flag |= HBA_ERATT_HANDLED; } /* Clear up only attention source related to slow-path */ writel((ha_copy & (HA_MBATT | HA_R2_CLR_MSK)), phba->HAregaddr); readl(phba->HAregaddr); /* flush */ spin_unlock_irqrestore(&phba->hbalock, iflag); } else ha_copy = phba->ha_copy; work_ha_copy = ha_copy & phba->work_ha_mask; if (work_ha_copy) { if (work_ha_copy & HA_LATT) { if (phba->sli.sli_flag & LPFC_PROCESS_LA) { /* * Turn off Link Attention interrupts * until CLEAR_LA done */ spin_lock_irqsave(&phba->hbalock, iflag); phba->sli.sli_flag &= ~LPFC_PROCESS_LA; control = readl(phba->HCregaddr); control &= ~HC_LAINT_ENA; writel(control, phba->HCregaddr); readl(phba->HCregaddr); /* flush */ spin_unlock_irqrestore(&phba->hbalock, iflag); } else work_ha_copy &= ~HA_LATT; } if (work_ha_copy & ~(HA_ERATT | HA_MBATT | HA_LATT)) { /* * Turn off Slow Rings interrupts, LPFC_ELS_RING is * the only slow ring. */ status = (work_ha_copy & (HA_RXMASK << (4*LPFC_ELS_RING))); status >>= (4*LPFC_ELS_RING); if (status & HA_RXMASK) { spin_lock_irqsave(&phba->hbalock, iflag); control = readl(phba->HCregaddr); lpfc_debugfs_slow_ring_trc(phba, "ISR slow ring: ctl:x%x stat:x%x isrcnt:x%x", control, status, (uint32_t)phba->sli.slistat.sli_intr); if (control & (HC_R0INT_ENA << LPFC_ELS_RING)) { lpfc_debugfs_slow_ring_trc(phba, "ISR Disable ring:" "pwork:x%x hawork:x%x wait:x%x", phba->work_ha, work_ha_copy, (uint32_t)((unsigned long) &phba->work_waitq)); control &= ~(HC_R0INT_ENA << LPFC_ELS_RING); writel(control, phba->HCregaddr); readl(phba->HCregaddr); /* flush */ } else { lpfc_debugfs_slow_ring_trc(phba, "ISR slow ring: pwork:" "x%x hawork:x%x wait:x%x", phba->work_ha, work_ha_copy, (uint32_t)((unsigned long) &phba->work_waitq)); } spin_unlock_irqrestore(&phba->hbalock, iflag); } } spin_lock_irqsave(&phba->hbalock, iflag); if (work_ha_copy & HA_ERATT) lpfc_sli_read_hs(phba); if ((work_ha_copy & HA_MBATT) && (phba->sli.mbox_active)) { pmb = phba->sli.mbox_active; pmbox = &pmb->mb; mbox = phba->mbox; vport = pmb->vport; /* First check out the status word */ lpfc_sli_pcimem_bcopy(mbox, pmbox, sizeof(uint32_t)); if (pmbox->mbxOwner != OWN_HOST) { spin_unlock_irqrestore(&phba->hbalock, iflag); /* * Stray Mailbox Interrupt, mbxCommand * mbxStatus */ lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI, "(%d):0304 Stray Mailbox " "Interrupt mbxCommand x%x " "mbxStatus x%x\n", (vport ? vport->vpi : 0), pmbox->mbxCommand, pmbox->mbxStatus); /* clear mailbox attention bit */ work_ha_copy &= ~HA_MBATT; } else { phba->sli.mbox_active = NULL; spin_unlock_irqrestore(&phba->hbalock, iflag); phba->last_completion_time = jiffies; del_timer(&phba->sli.mbox_tmo); if (pmb->mbox_cmpl) { lpfc_sli_pcimem_bcopy(mbox, pmbox, MAILBOX_CMD_SIZE); } if (pmb->mbox_flag & LPFC_MBX_IMED_UNREG) { pmb->mbox_flag &= ~LPFC_MBX_IMED_UNREG; lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_MBOX_VPORT, "MBOX dflt rpi: : " "status:x%x rpi:x%x", (uint32_t)pmbox->mbxStatus, pmbox->un.varWords[0], 0); if (!pmbox->mbxStatus) { mp = (struct lpfc_dmabuf *) (pmb->context1); ndlp = (struct lpfc_nodelist *) pmb->context2; /* Reg_LOGIN of dflt RPI was * successful. new lets get * rid of the RPI using the * same mbox buffer. */ lpfc_unreg_login(phba, vport->vpi, pmbox->un.varWords[0], pmb); pmb->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi; pmb->context1 = mp; pmb->context2 = ndlp; pmb->vport = vport; rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT); if (rc != MBX_BUSY) lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI, "0350 rc should have" "been MBX_BUSY"); goto send_current_mbox; } } spin_lock_irqsave( &phba->pport->work_port_lock, iflag); phba->pport->work_port_events &= ~WORKER_MBOX_TMO; spin_unlock_irqrestore( &phba->pport->work_port_lock, iflag); lpfc_mbox_cmpl_put(phba, pmb); } } else spin_unlock_irqrestore(&phba->hbalock, iflag); if ((work_ha_copy & HA_MBATT) && (phba->sli.mbox_active == NULL)) { send_current_mbox: /* Process next mailbox command if there is one */ do { rc = lpfc_sli_issue_mbox(phba, NULL, MBX_NOWAIT); } while (rc == MBX_NOT_FINISHED); if (rc != MBX_SUCCESS) lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI, "0349 rc should be " "MBX_SUCCESS"); } spin_lock_irqsave(&phba->hbalock, iflag); phba->work_ha |= work_ha_copy; spin_unlock_irqrestore(&phba->hbalock, iflag); lpfc_worker_wake_up(phba); } return IRQ_HANDLED; } /* lpfc_sp_intr_handler */ /** * lpfc_fp_intr_handler: The fast-path interrupt handler of lpfc driver. * @irq: Interrupt number. * @dev_id: The device context pointer. * * This function is directly called from the PCI layer as an interrupt * service routine when the device is enabled with MSI-X multi-message * interrupt mode and there is a fast-path FCP IOCB ring event in the * HBA. However, when the device is enabled with either MSI or Pin-IRQ * interrupt mode, this function is called as part of the device-level * interrupt handler. When the PCI slot is in error recovery or the HBA * is undergoing initialization, the interrupt handler will not process * the interrupt. The SCSI FCP fast-path ring event are handled in the * intrrupt context. This function is called without any lock held. It * gets the hbalock to access and update SLI data structures. * * This function returns IRQ_HANDLED when interrupt is handled else it * returns IRQ_NONE. **/ irqreturn_t lpfc_fp_intr_handler(int irq, void *dev_id) { struct lpfc_hba *phba; uint32_t ha_copy; unsigned long status; unsigned long iflag; /* Get the driver's phba structure from the dev_id and * assume the HBA is not interrupting. */ phba = (struct lpfc_hba *) dev_id; if (unlikely(!phba)) return IRQ_NONE; /* * Stuff needs to be attented to when this function is invoked as an * individual interrupt handler in MSI-X multi-message interrupt mode */ if (phba->intr_type == MSIX) { /* If pci channel is offline, ignore all the interrupts */ if (unlikely(pci_channel_offline(phba->pcidev))) return IRQ_NONE; /* Update device-level interrupt statistics */ phba->sli.slistat.sli_intr++; /* Ignore all interrupts during initialization. */ if (unlikely(phba->link_state < LPFC_LINK_DOWN)) return IRQ_NONE; /* Need to read HA REG for FCP ring and other ring events */ ha_copy = readl(phba->HAregaddr); /* Clear up only attention source related to fast-path */ spin_lock_irqsave(&phba->hbalock, iflag); writel((ha_copy & (HA_R0_CLR_MSK | HA_R1_CLR_MSK)), phba->HAregaddr); readl(phba->HAregaddr); /* flush */ spin_unlock_irqrestore(&phba->hbalock, iflag); } else ha_copy = phba->ha_copy; /* * Process all events on FCP ring. Take the optimized path for FCP IO. */ ha_copy &= ~(phba->work_ha_mask); status = (ha_copy & (HA_RXMASK << (4*LPFC_FCP_RING))); status >>= (4*LPFC_FCP_RING); if (status & HA_RXMASK) lpfc_sli_handle_fast_ring_event(phba, &phba->sli.ring[LPFC_FCP_RING], status); if (phba->cfg_multi_ring_support == 2) { /* * Process all events on extra ring. Take the optimized path * for extra ring IO. */ status = (ha_copy & (HA_RXMASK << (4*LPFC_EXTRA_RING))); status >>= (4*LPFC_EXTRA_RING); if (status & HA_RXMASK) { lpfc_sli_handle_fast_ring_event(phba, &phba->sli.ring[LPFC_EXTRA_RING], status); } } return IRQ_HANDLED; } /* lpfc_fp_intr_handler */ /** * lpfc_intr_handler: The device-level interrupt handler of lpfc driver. * @irq: Interrupt number. * @dev_id: The device context pointer. * * This function is the device-level interrupt handler called from the PCI * layer when either MSI or Pin-IRQ interrupt mode is enabled and there is * an event in the HBA which requires driver attention. This function * invokes the slow-path interrupt attention handling function and fast-path * interrupt attention handling function in turn to process the relevant * HBA attention events. This function is called without any lock held. It * gets the hbalock to access and update SLI data structures. * * This function returns IRQ_HANDLED when interrupt is handled, else it * returns IRQ_NONE. **/ irqreturn_t lpfc_intr_handler(int irq, void *dev_id) { struct lpfc_hba *phba; irqreturn_t sp_irq_rc, fp_irq_rc; unsigned long status1, status2; /* * Get the driver's phba structure from the dev_id and * assume the HBA is not interrupting. */ phba = (struct lpfc_hba *) dev_id; if (unlikely(!phba)) return IRQ_NONE; /* If the pci channel is offline, ignore all the interrupts. */ if (unlikely(pci_channel_offline(phba->pcidev))) return IRQ_NONE; /* Update device level interrupt statistics */ phba->sli.slistat.sli_intr++; /* Ignore all interrupts during initialization. */ if (unlikely(phba->link_state < LPFC_LINK_DOWN)) return IRQ_NONE; spin_lock(&phba->hbalock); phba->ha_copy = readl(phba->HAregaddr); if (unlikely(!phba->ha_copy)) { spin_unlock(&phba->hbalock); return IRQ_NONE; } else if (phba->ha_copy & HA_ERATT) { if (phba->hba_flag & HBA_ERATT_HANDLED) /* ERATT polling has handled ERATT */ phba->ha_copy &= ~HA_ERATT; else /* Indicate interrupt handler handles ERATT */ phba->hba_flag |= HBA_ERATT_HANDLED; } /* Clear attention sources except link and error attentions */ writel((phba->ha_copy & ~(HA_LATT | HA_ERATT)), phba->HAregaddr); readl(phba->HAregaddr); /* flush */ spin_unlock(&phba->hbalock); /* * Invokes slow-path host attention interrupt handling as appropriate. */ /* status of events with mailbox and link attention */ status1 = phba->ha_copy & (HA_MBATT | HA_LATT | HA_ERATT); /* status of events with ELS ring */ status2 = (phba->ha_copy & (HA_RXMASK << (4*LPFC_ELS_RING))); status2 >>= (4*LPFC_ELS_RING); if (status1 || (status2 & HA_RXMASK)) sp_irq_rc = lpfc_sp_intr_handler(irq, dev_id); else sp_irq_rc = IRQ_NONE; /* * Invoke fast-path host attention interrupt handling as appropriate. */ /* status of events with FCP ring */ status1 = (phba->ha_copy & (HA_RXMASK << (4*LPFC_FCP_RING))); status1 >>= (4*LPFC_FCP_RING); /* status of events with extra ring */ if (phba->cfg_multi_ring_support == 2) { status2 = (phba->ha_copy & (HA_RXMASK << (4*LPFC_EXTRA_RING))); status2 >>= (4*LPFC_EXTRA_RING); } else status2 = 0; if ((status1 & HA_RXMASK) || (status2 & HA_RXMASK)) fp_irq_rc = lpfc_fp_intr_handler(irq, dev_id); else fp_irq_rc = IRQ_NONE; /* Return device-level interrupt handling status */ return (sp_irq_rc == IRQ_HANDLED) ? sp_irq_rc : fp_irq_rc; } /* lpfc_intr_handler */