/* * QLogic iSCSI HBA Driver * Copyright (c) 2003-2006 QLogic Corporation * * See LICENSE.qla4xxx for copyright and licensing details. */ #include "ql4_def.h" #include "ql4_version.h" #include "ql4_glbl.h" #include "ql4_dbg.h" #include "ql4_inline.h" #include /** * qla4xxx_check_and_copy_sense - copy sense data into cmd sense buffer * @ha: Pointer to host adapter structure. * @sts_entry: Pointer to status entry structure. * @srb: Pointer to srb structure. **/ static void qla4xxx_check_and_copy_sense(struct scsi_qla_host *ha, struct status_entry *sts_entry, struct srb *srb) { struct scsi_cmnd *cmd = srb->cmd; uint16_t sense_len; memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); sense_len = le16_to_cpu(sts_entry->senseDataByteCnt); if (sense_len == 0) return; /* Save total available sense length, * not to exceed cmd's sense buffer size */ sense_len = min(sense_len, (uint16_t) SCSI_SENSE_BUFFERSIZE); srb->req_sense_ptr = cmd->sense_buffer; srb->req_sense_len = sense_len; /* Copy sense from sts_entry pkt */ sense_len = min(sense_len, (uint16_t) IOCB_MAX_SENSEDATA_LEN); memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len); DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, " "ASL = %02x, ASC/ASCQ = %02x/%02x\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun, __func__, sts_entry->senseData[2] & 0x0f, sts_entry->senseData[7], sts_entry->senseData[12], sts_entry->senseData[13])); DEBUG5(qla4xxx_dump_buffer(cmd->sense_buffer, sense_len)); srb->flags |= SRB_GOT_SENSE; /* Update srb, in case a sts_cont pkt follows */ srb->req_sense_ptr += sense_len; srb->req_sense_len -= sense_len; if (srb->req_sense_len != 0) ha->status_srb = srb; else ha->status_srb = NULL; if ((srb->flags & SRB_SCSI_PASSTHRU)) return; /* check for vaild sense data */ if ((sts_entry->senseData[0] & 0x70) != 0x70) return; switch (sts_entry->senseData[2] & 0x0f) { case UNIT_ATTENTION: if (sts_entry->senseData[12] == 0x3F && sts_entry->senseData[13] == 0x0E) { struct ddb_entry *ddb_entry; ddb_entry = qla4xxx_lookup_ddb_by_os_index(ha, cmd->device->id); if (ddb_entry) { dev_info(&ha->pdev->dev,"%s: ddb[%d] os[%d] " "schedule dynamic lun scan\n", __func__, ddb_entry->fw_ddb_index, ddb_entry->os_target_id); set_bit(DF_DYNAMIC_LUN_SCAN_NEEDED, &ddb_entry->flags); set_bit(DPC_DYNAMIC_LUN_SCAN, &ha->dpc_flags); } } break; } } /** * qla4xxx_status_cont_entry() - Process a Status Continuations entry. * @ha: SCSI driver HA context * @sts_cont: Entry pointer * * Extended sense data. */ static void qla4xxx_status_cont_entry(struct scsi_qla_host *ha, struct status_cont_entry *sts_cont) { struct srb *srb = ha->status_srb; struct scsi_cmnd *cmd; uint16_t sense_len; if (srb == NULL) return; cmd = srb->cmd; if (cmd == NULL) { DEBUG2(printk("scsi%ld: %s: Cmd already returned back to OS " "srb=%p srb->state:%d\n", ha->host_no, __func__, srb, srb->state)); ha->status_srb = NULL; return; } /* Copy sense data. */ sense_len = min(srb->req_sense_len, (uint16_t) IOCB_MAX_EXT_SENSEDATA_LEN); memcpy(srb->req_sense_ptr, sts_cont->extSenseData, sense_len); DEBUG5(qla4xxx_dump_buffer(srb->req_sense_ptr, sense_len)); srb->req_sense_ptr += sense_len; srb->req_sense_len -= sense_len; /* Place command on done queue. */ if (srb->req_sense_len == 0) { sp_put(ha, srb); ha->status_srb = NULL; } } /** * qla4xxx_status_entry - processes status IOCBs * @ha: Pointer to host adapter structure. * @sts_entry: Pointer to status entry structure. **/ static void qla4xxx_status_entry(struct scsi_qla_host *ha, struct status_entry *sts_entry) { uint8_t scsi_status; struct scsi_cmnd *cmd; struct srb *srb; struct ddb_entry *ddb_entry; uint32_t residual; srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle)); if (!srb) { dev_warn(&ha->pdev->dev, "%s invalid status entry:" " handle=0x%0x\n", __func__, sts_entry->handle); set_bit(DPC_RESET_HA, &ha->dpc_flags); return; } cmd = srb->cmd; if (cmd == NULL) { dev_warn(&ha->pdev->dev, "%s Command is NULL: srb=%p" " sts_handle=0x%0x srb_state=0x%0x\n", __func__, srb, sts_entry->handle, srb->state); return; } ddb_entry = srb->ddb; if (ddb_entry == NULL) { cmd->result = DID_NO_CONNECT << 16; goto status_entry_exit; } residual = le32_to_cpu(sts_entry->residualByteCnt); /* Translate ISP error to a Linux SCSI error. */ scsi_status = sts_entry->scsiStatus; switch (sts_entry->completionStatus) { case SCS_COMPLETE: if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) { cmd->result = DID_ERROR << 16; break; } if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) { cmd->resid = residual; if (!scsi_status && ((cmd->request_bufflen - residual) < cmd->underflow)) { cmd->result = DID_ERROR << 16; break; } } cmd->result = DID_OK << 16 | scsi_status; if (scsi_status != SCSI_CHECK_CONDITION) break; qla4xxx_check_and_copy_sense(ha, sts_entry, srb); break; case SCS_INCOMPLETE: /* Always set the status to DID_ERROR, since * all conditions result in that status anyway */ cmd->result = DID_ERROR << 16; break; case SCS_RESET_OCCURRED: DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun, __func__)); cmd->result = DID_RESET << 16; break; case SCS_ABORTED: DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun, __func__)); cmd->result = DID_RESET << 16; break; case SCS_TIMEOUT: DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun)); cmd->result = DID_BUS_BUSY << 16; /* * Mark device missing so that we won't continue to send * I/O to this device. We should get a ddb state change * AEN soon. */ if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE) qla4xxx_mark_device_missing(ha, ddb_entry); break; case SCS_DATA_UNDERRUN: case SCS_DATA_OVERRUN: if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) || (sts_entry->completionStatus == SCS_DATA_OVERRUN)) { DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun, __func__)); cmd->result = DID_ERROR << 16; break; } cmd->resid = residual; /* * If there is scsi_status, it takes precedense over * underflow condition. */ if (scsi_status != 0) { cmd->result = DID_OK << 16 | scsi_status; if (scsi_status != SCSI_CHECK_CONDITION) break; qla4xxx_check_and_copy_sense(ha, sts_entry, srb); } else { /* * If RISC reports underrun and target does not * report it then we must have a lost frame, so * tell upper layer to retry it by reporting a * bus busy. */ if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) == 0) { cmd->result = DID_BUS_BUSY << 16; } else if ((cmd->request_bufflen - residual) < cmd->underflow) { /* * Handle mid-layer underflow??? * * For kernels less than 2.4, the driver must * return an error if an underflow is detected. * For kernels equal-to and above 2.4, the * mid-layer will appearantly handle the * underflow by detecting the residual count -- * unfortunately, we do not see where this is * actually being done. In the interim, we * will return DID_ERROR. */ DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Mid-layer Data underrun len = 0x%x, " "resid = 0x%x, compstat = 0x%x\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun, __func__, cmd->request_bufflen, residual, sts_entry->completionStatus)); cmd->result = DID_ERROR << 16; } else { cmd->result = DID_OK << 16; } } break; case SCS_DEVICE_LOGGED_OUT: case SCS_DEVICE_UNAVAILABLE: /* * Mark device missing so that we won't continue to * send I/O to this device. We should get a ddb * state change AEN soon. */ DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: DEVICE_UNAVAILABLE " "or DEVICE_LOGGED_OUT\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun)); if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE) qla4xxx_mark_device_missing(ha, ddb_entry); cmd->result = DID_BUS_BUSY << 16; break; case SCS_QUEUE_FULL: /* * SCSI Mid-Layer handles device queue full */ cmd->result = DID_OK << 16 | sts_entry->scsiStatus; DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected " "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x," " iResp=%02x\n", ha->host_no, cmd->device->id, cmd->device->lun, __func__, sts_entry->completionStatus, sts_entry->scsiStatus, sts_entry->state_flags, sts_entry->iscsiFlags, sts_entry->iscsiResponse)); break; default: cmd->result = DID_ERROR << 16; break; } status_entry_exit: /* complete the request, if not waiting for status_continuation pkt */ srb->cc_stat = sts_entry->completionStatus; if (ha->status_srb == NULL) sp_put(ha, srb); } /** * qla4xxx_process_response_queue - process response queue completions * @ha: Pointer to host adapter structure. * * This routine process response queue completions in interrupt context. * Hardware_lock locked upon entry **/ static void qla4xxx_process_response_queue(struct scsi_qla_host * ha) { uint32_t count = 0; struct srb *srb = NULL; struct status_entry *sts_entry; #ifndef __VMKLNX__ struct async_pdu_iocb *apdu; struct iscsi_hdr *pdu_hdr; struct async_msg_pdu_iocb *apdu_iocb; #endif /* __VMKLNX__ */ /* Process all responses from response queue */ while ((ha->response_in = (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in)) != ha->response_out) { sts_entry = (struct status_entry *) ha->response_ptr; count++; /* Advance pointers for next entry */ if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) { ha->response_out = 0; ha->response_ptr = ha->response_ring; } else { ha->response_out++; ha->response_ptr++; } /* process entry */ switch (sts_entry->hdr.entryType) { case ET_STATUS: qla4xxx_status_entry(ha, sts_entry); break; case ET_PASSTHRU_STATUS: break; #ifdef __VMKLNX__ case ET_ASYNC_PDU: /* Just throw away the async entries */ DEBUG2(printk("scsi%ld: %s: Async entry - " "ignoring\n", ha->host_no, __func__)); break; #else /* NOT __VMKLNX__ */ case ET_ASYNC_PDU: apdu = (struct async_pdu_iocb *)sts_entry; if (apdu->status != ASYNC_PDU_IOCB_STS_OK) break; pdu_hdr = (struct iscsi_hdr *)apdu->iscsi_pdu_hdr; if (pdu_hdr->hlength || pdu_hdr->dlength[0] || pdu_hdr->dlength[1] || pdu_hdr->dlength[2]) { apdu_iocb = kmalloc(sizeof(struct async_msg_pdu_iocb), GFP_ATOMIC); if (apdu_iocb) { memcpy(apdu_iocb->iocb, apdu, sizeof(struct async_pdu_iocb)); list_add_tail(&apdu_iocb->list, &ha->async_iocb_list); DEBUG2(printk("scsi%ld:" "%s: schedule async msg pdu\n", ha->host_no, __func__)); set_bit(DPC_ASYNC_PDU, &ha->dpc_flags); } else { DEBUG2(printk("scsi%ld:" "%s: unable to alloc ASYNC PDU\n", ha->host_no, __func__)); } } break; #endif /* __VMKLNX __ */ case ET_STATUS_CONTINUATION: qla4xxx_status_cont_entry(ha, (struct status_cont_entry *) sts_entry); break; case ET_COMMAND: /* ISP device queue is full. Command not * accepted by ISP. Queue command for * later */ srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry-> handle)); if (srb == NULL) goto exit_prq_invalid_handle; DEBUG2(printk("scsi%ld: %s: FW device queue full, " "srb %p\n", ha->host_no, __func__, srb)); /* ETRY normally by sending it back with * DID_BUS_BUSY */ srb->cmd->result = DID_BUS_BUSY << 16; sp_put(ha, srb); break; case ET_CONTINUE: /* Just throw away the continuation entries */ DEBUG2(printk("scsi%ld: %s: Continuation entry - " "ignoring\n", ha->host_no, __func__)); break; default: /* * Invalid entry in response queue, reset RISC * firmware. */ DEBUG2(printk("scsi%ld: %s: Invalid entry %x in " "response queue \n", ha->host_no, __func__, sts_entry->hdr.entryType)); break; } } /* * Done with responses, update the ISP For QLA4010, this also clears * the interrupt. */ writel(ha->response_out, &ha->reg->rsp_q_out); readl(&ha->reg->rsp_q_out); return; exit_prq_invalid_handle: printk(KERN_WARNING "scsi%ld: %s: Invalid handle(srb)=%p" " type=%x IOCS=%x\n", ha->host_no, __func__, srb, sts_entry->hdr.entryType, sts_entry->completionStatus); /* * Done with responses, update the ISP For QLA40xx, this also clears * the interrupt. */ writel(ha->response_out, &ha->reg->rsp_q_out); readl(&ha->reg->rsp_q_out); } /** * qla4xxx_isr_decode_mailbox - decodes mailbox status * @ha: Pointer to host adapter structure. * @mailbox_status: Mailbox status. * * This routine decodes the mailbox status during the ISR. * Hardware_lock locked upon entry. runs in interrupt context. **/ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha, uint32_t mbox_status) { int i; uint32_t mbox_stat2, mbox_stat3; if ((mbox_status == MBOX_STS_BUSY) || (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) || (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) { ha->mbox_status[0] = mbox_status; if (test_bit(AF_MBOX_COMMAND, &ha->flags)) { /* * Copy all mailbox registers to a temporary * location and set mailbox command done flag */ for (i = 1; i < ha->mbox_status_count; i++) ha->mbox_status[i] = readl(&ha->reg->mailbox[i]); set_bit(AF_MBOX_COMMAND_DONE, &ha->flags); } } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) { /* Queue all AENs into internal AEN database. The driver will * report AEN information to Application layer when requested.*/ qla4xxx_queue_aen_log(ha, &mbox_status); /* NOTE: Non-DDB_CHANGED AENs are processed immediately, * and DDB_CHANGED AENs are processed in the DPC */ switch (mbox_status) { case MBOX_ASTS_SYSTEM_ERROR: /* Log Mailbox registers */ #ifdef __VMKLNX__ /* * Unrecoverable internal firmware errors. These should * never occur and based on the ISP40XX spec section 10.3 * we need the mbx 0-7 to even report them to qlogic. The * driver will attempt to recover the firmware and continue * IO. */ dev_info(&ha->pdev->dev, "scsi%ld: %s: adapter system error " "(0x%08x:0x%08x:0x%08x:0x%08x:0x%08x:0x%08x:0x%08x:0x%08x)\n", ha->host_no, __func__, readl(&ha->reg->mailbox[0]), readl(&ha->reg->mailbox[1]), readl(&ha->reg->mailbox[2]), readl(&ha->reg->mailbox[3]), readl(&ha->reg->mailbox[4]), readl(&ha->reg->mailbox[5]), readl(&ha->reg->mailbox[6]), readl(&ha->reg->mailbox[7])); #endif if (ql4xdontresethba) { DEBUG2(printk("%s:Dont Reset HBA\n", __func__)); } else { set_bit(AF_GET_CRASH_RECORD, &ha->flags); set_bit(DPC_RESET_HA, &ha->dpc_flags); } break; case MBOX_ASTS_REQUEST_TRANSFER_ERROR: case MBOX_ASTS_RESPONSE_TRANSFER_ERROR: case MBOX_ASTS_NVRAM_INVALID: case MBOX_ASTS_IP_ADDRESS_CHANGED: case MBOX_ASTS_DHCP_LEASE_EXPIRED: DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, " "Reset HA\n", ha->host_no, mbox_status)); set_bit(DPC_RESET_HA, &ha->dpc_flags); break; case MBOX_ASTS_LINK_UP: set_bit(AF_LINK_UP, &ha->flags); #ifdef __VMKLNX__ if test_bit(AF_INIT_DONE, &ha->flags) set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); dev_info(&ha->pdev->dev, "scsi%ld: %s: adapter LINK UP\n", ha->host_no, __func__); #endif break; case MBOX_ASTS_LINK_DOWN: clear_bit(AF_LINK_UP, &ha->flags); #ifdef __VMKLNX__ set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); dev_info(&ha->pdev->dev, "scsi%ld: %s: adapter LINK DOWN\n", ha->host_no, __func__); #endif break; case MBOX_ASTS_HEARTBEAT: ha->seconds_since_last_heartbeat = 0; break; case MBOX_ASTS_DHCP_LEASE_ACQUIRED: DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE " "ACQUIRED\n", ha->host_no, mbox_status)); set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); break; case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM: case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target * mode * only */ case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */ case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR: case MBOX_ASTS_SUBNET_STATE_CHANGE: /* No action */ DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no, mbox_status)); break; case MBOX_ASTS_IP_ADDR_STATE_CHANGED: mbox_stat2 = readl(&ha->reg->mailbox[2]); mbox_stat3 = readl(&ha->reg->mailbox[3]); if ((mbox_stat3 == 5) && (mbox_stat2 == 3)) set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); else if ((mbox_stat3 == 2) && (mbox_stat2 == 5)) set_bit(DPC_RESET_HA, &ha->dpc_flags); break; case MBOX_ASTS_MAC_ADDRESS_CHANGED: case MBOX_ASTS_DNS: /* No action */ DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, " "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n", ha->host_no, mbox_status, readl(&ha->reg->mailbox[1]), readl(&ha->reg->mailbox[2]))); break; case MBOX_ASTS_SELF_TEST_FAILED: case MBOX_ASTS_LOGIN_FAILED: /* No action */ DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, " "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n", ha->host_no, mbox_status, readl(&ha->reg->mailbox[1]), readl(&ha->reg->mailbox[2]), readl(&ha->reg->mailbox[3]))); break; case MBOX_ASTS_DATABASE_CHANGED: /* Queue AEN information and process it in the DPC * routine */ if (ha->aen_q_count > 0) { /* decrement available counter */ ha->aen_q_count--; for (i = 1; i < MBOX_AEN_REG_COUNT; i++) ha->aen_q[ha->aen_in].mbox_sts[i] = readl(&ha->reg->mailbox[i]); ha->aen_q[ha->aen_in].mbox_sts[0] = mbox_status; /* print debug message */ DEBUG2(printk("scsi%ld: AEN[%d] %04x queued" " mb1:0x%x mb2:0x%x mb3:0x%x mb4:0x%x\n", ha->host_no, ha->aen_in, mbox_status, ha->aen_q[ha->aen_in].mbox_sts[1], ha->aen_q[ha->aen_in].mbox_sts[2], ha->aen_q[ha->aen_in].mbox_sts[3], ha->aen_q[ha->aen_in]. mbox_sts[4])); /* advance pointer */ ha->aen_in++; if (ha->aen_in == MAX_AEN_ENTRIES) ha->aen_in = 0; /* The DPC routine will process the aen */ set_bit(DPC_AEN, &ha->dpc_flags); } else { DEBUG2(printk("scsi%ld: %s: aen %04x, queue " "overflowed! AEN LOST!!\n", ha->host_no, __func__, mbox_status)); DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n", ha->host_no)); for (i = 0; i < MAX_AEN_ENTRIES; i++) { DEBUG2(printk("AEN[%d] %04x %04x %04x " "%04x\n", i, ha->aen_q[i].mbox_sts[0], ha->aen_q[i].mbox_sts[1], ha->aen_q[i].mbox_sts[2], ha->aen_q[i].mbox_sts[3])); } } break; default: DEBUG2(printk(KERN_WARNING "scsi%ld: AEN %04x UNKNOWN\n", ha->host_no, mbox_status)); break; } } else { DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n", ha->host_no, mbox_status)); ha->mbox_status[0] = mbox_status; } } /** * qla4xxx_interrupt_service_routine - isr * @ha: pointer to host adapter structure. * * This is the main interrupt service routine. * hardware_lock locked upon entry. runs in interrupt context. **/ void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha, uint32_t intr_status) { /* Process response queue interrupt. */ if (intr_status & CSR_SCSI_COMPLETION_INTR) qla4xxx_process_response_queue(ha); /* Process mailbox/asynch event interrupt.*/ if (intr_status & CSR_SCSI_PROCESSOR_INTR) { qla4xxx_isr_decode_mailbox(ha, readl(&ha->reg->mailbox[0])); /* Clear Mailbox Interrupt */ writel(set_rmask(CSR_SCSI_PROCESSOR_INTR), &ha->reg->ctrl_status); readl(&ha->reg->ctrl_status); } } /** * qla4xxx_intr_handler - hardware interrupt handler. * @irq: Unused * @dev_id: Pointer to host adapter structure * @regs: Unused **/ #if defined(__VMKLNX__) irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id) #else /* !defined(__VMKLNX__) */ irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id, struct pt_regs *regs) #endif /* defined(__VMKLNX__) */ { struct scsi_qla_host *ha; uint32_t intr_status; unsigned long flags = 0; uint8_t reqs_count = 0; ha = (struct scsi_qla_host *) dev_id; if (!ha) { DEBUG2(printk(KERN_INFO "qla4xxx: Interrupt with NULL host ptr\n")); return IRQ_NONE; } spin_lock_irqsave(&ha->hardware_lock, flags); DEBUG2(ha->seconds_since_last_intr = 0); ha->isr_count++; /* * Repeatedly service interrupts up to a maximum of * MAX_REQS_SERVICED_PER_INTR */ while (1) { /* * Read interrupt status */ if (le32_to_cpu(ha->shadow_regs->rsp_q_in) != ha->response_out) intr_status = CSR_SCSI_COMPLETION_INTR; else intr_status = readl(&ha->reg->ctrl_status); if ((intr_status & (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) { if (reqs_count == 0) ha->spurious_int_count++; break; } if (intr_status & CSR_FATAL_ERROR) { DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, " "Status 0x%04x\n", ha->host_no, readl(isp_port_error_status (ha)))); /* Issue Soft Reset to clear this error condition. * This will prevent the RISC from repeatedly * interrupting the driver; thus, allowing the DPC to * get scheduled to continue error recovery. * NOTE: Disabling RISC interrupts does not work in * this case, as CSR_FATAL_ERROR overrides * CSR_SCSI_INTR_ENABLE */ if ((readl(&ha->reg->ctrl_status) & CSR_SCSI_RESET_INTR) == 0) { writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status); readl(&ha->reg->ctrl_status); } writel(set_rmask(CSR_FATAL_ERROR), &ha->reg->ctrl_status); readl(&ha->reg->ctrl_status); __qla4xxx_disable_intrs(ha); set_bit(DPC_RESET_HA, &ha->dpc_flags); break; } else if (intr_status & CSR_SCSI_RESET_INTR) { clear_bit(AF_ONLINE, &ha->flags); #ifdef __VMKLNX__ dev_info(&ha->pdev->dev, "scsi%ld: %s: adapter OFFLINE\n", ha->host_no, __func__); #endif __qla4xxx_disable_intrs(ha); writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); readl(&ha->reg->ctrl_status); if (!ql4_mod_unload) set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); break; } else if (intr_status & INTR_PENDING) { qla4xxx_interrupt_service_routine(ha, intr_status); ha->total_io_count++; if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) break; intr_status = 0; } } spin_unlock_irqrestore(&ha->hardware_lock, flags); return IRQ_HANDLED; } /** * qla4xxx_process_aen - processes AENs generated by firmware * @ha: pointer to host adapter structure. * @process_aen: type of AENs to process * * Processes specific types of Asynchronous Events generated by firmware. * The type of AENs to process is specified by process_aen and can be * PROCESS_ALL_AENS 0 * FLUSH_DDB_CHANGED_AENS 1 * RELOGIN_DDB_CHANGED_AENS 2 * PROCESS_FOR_PROBE 3 * * Only DDB Changed AENs are processed here. All other AENs are processed * in the interrupt context as soon as they arrive. **/ void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen) { uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; struct aen *aen; int i; unsigned long flags; DEBUG6(dev_info(&ha->pdev->dev, "%s proc_aen 0x%x\n", __func__, process_aen)); spin_lock_irqsave(&ha->hardware_lock, flags); if (process_aen == FLUSH_DDB_CHANGED_AENS) { ha->aen_q_count = MAX_AEN_ENTRIES; ha->aen_out = ha->aen_in = 0; spin_unlock_irqrestore(&ha->hardware_lock, flags); return; } while (ha->aen_out != ha->aen_in) { aen = &ha->aen_q[ha->aen_out]; /* copy aen information to local structure */ for (i = 0; i < MBOX_AEN_REG_COUNT; i++) mbox_sts[i] = aen->mbox_sts[i]; ha->aen_q_count++; ha->aen_out++; if (ha->aen_out == MAX_AEN_ENTRIES) ha->aen_out = 0; DEBUG6(dev_info(&ha->pdev->dev, "%s mbx0 0x%x mbx1 0x%x mbx2 " "0x%x mbx3 0x%x ddb 0x%p\n", __func__, mbox_sts[0], mbox_sts[1], mbox_sts[2], mbox_sts[3], qla4xxx_lookup_ddb_by_fw_index(ha, mbox_sts[2]))); spin_unlock_irqrestore(&ha->hardware_lock, flags); if (process_aen == RELOGIN_DDB_CHANGED_AENS) { /* for use during init time, we only want to * relogin non-active ddbs */ struct ddb_entry *ddb_entry; ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, mbox_sts[2]); if (ddb_entry) { DEBUG6(dev_info(&ha->pdev->dev, "%s ddb 0x%p " "sess 0x%p conn 0x%p state 0x%x\n", __func__, ddb_entry, ddb_entry->sess, ddb_entry->conn, ddb_entry->state)); ddb_entry->dev_scan_wait_to_complete_relogin = 0; ddb_entry->dev_scan_wait_to_start_relogin = jiffies + ((ddb_entry->default_time2wait + 4) * HZ); DEBUG2(printk("scsi%ld: ddb index [%d] initate" " RELOGIN after %d seconds\n", ha->host_no, ddb_entry->fw_ddb_index, ddb_entry->default_time2wait + 4)); } } else if (mbox_sts[0] == MBOX_ASTS_DATABASE_CHANGED) { if (mbox_sts[1] == 0) { /* Global DB change. */ qla4xxx_reinitialize_ddb_list(ha); } else if (mbox_sts[1] == 1) { /* Specific device. */ qla4xxx_process_ddb_changed(ha, mbox_sts[2], mbox_sts[3], mbox_sts[4], ((process_aen == PROCESS_FOR_PROBE) ? 1 : 0 )); } } spin_lock_irqsave(&ha->hardware_lock, flags); } spin_unlock_irqrestore(&ha->hardware_lock, flags); }