--- /dev/null
+/*
+ * QLogic iSCSI HBA Driver
+ * Copyright (c) 2003-2013 QLogic Corporation
+ *
+ * See LICENSE.qla4xxx for copyright and licensing details.
+ */
+
+#include "ql4_def.h"
+#include "ql4_glbl.h"
+#include "ql4_dbg.h"
+#include "ql4_inline.h"
+
+/**
+ * qla4xxx_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_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) {
+ DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld:%d:%d:%llu: %s:"
+ " sense len 0\n", ha->host_no,
+ cmd->device->channel, cmd->device->id,
+ cmd->device->lun, __func__));
+ ha->status_srb = NULL;
+ return;
+ }
+ /* Save total available sense length,
+ * not to exceed cmd's sense buffer size */
+ sense_len = min_t(uint16_t, sense_len, 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_t(uint16_t, sense_len, IOCB_MAX_SENSEDATA_LEN);
+ memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len);
+
+ DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%llu: %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;
+}
+
+/**
+ * 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(KERN_INFO "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_t(uint16_t, srb->req_sense_len,
+ IOCB_MAX_EXT_SENSEDATA_LEN);
+ memcpy(srb->req_sense_ptr, sts_cont->ext_sense_data, 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) {
+ kref_put(&srb->srb_ref, qla4xxx_srb_compl);
+ 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) {
+ ql4_printk(KERN_WARNING, ha, "%s invalid status entry: "
+ "handle=0x%0x, srb=%p\n", __func__,
+ sts_entry->handle, srb);
+ if (is_qla80XX(ha))
+ set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
+ else
+ set_bit(DPC_RESET_HA, &ha->dpc_flags);
+ return;
+ }
+
+ cmd = srb->cmd;
+ if (cmd == NULL) {
+ DEBUG2(printk("scsi%ld: %s: Command already returned back to "
+ "OS pkt->handle=%d srb=%p srb->state:%d\n",
+ ha->host_no, __func__, sts_entry->handle,
+ srb, srb->state));
+ ql4_printk(KERN_WARNING, ha, "Command is NULL:"
+ " already returned to OS (srb=%p)\n", srb);
+ 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) {
+ scsi_set_resid(cmd, residual);
+ if (!scsi_status && ((scsi_bufflen(cmd) - residual) <
+ cmd->underflow)) {
+
+ cmd->result = DID_ERROR << 16;
+
+ DEBUG2(printk("scsi%ld:%d:%d:%llu: %s: "
+ "Mid-layer Data underrun0, "
+ "xferlen = 0x%x, "
+ "residual = 0x%x\n", ha->host_no,
+ cmd->device->channel,
+ cmd->device->id,
+ cmd->device->lun, __func__,
+ scsi_bufflen(cmd), residual));
+ break;
+ }
+ }
+
+ cmd->result = DID_OK << 16 | scsi_status;
+
+ if (scsi_status != SCSI_CHECK_CONDITION)
+ break;
+
+ /* Copy Sense Data into sense buffer. */
+ qla4xxx_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:%llu: %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:%llu: %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:%llu: Timeout\n",
+ ha->host_no, cmd->device->channel,
+ cmd->device->id, cmd->device->lun));
+
+ cmd->result = DID_TRANSPORT_DISRUPTED << 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 (iscsi_is_session_online(ddb_entry->sess))
+ qla4xxx_mark_device_missing(ddb_entry->sess);
+ 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:%llu: %s: " "Data overrun\n",
+ ha->host_no,
+ cmd->device->channel, cmd->device->id,
+ cmd->device->lun, __func__));
+
+ cmd->result = DID_ERROR << 16;
+ break;
+ }
+
+ scsi_set_resid(cmd, residual);
+
+ if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) {
+
+ /* Both the firmware and target reported UNDERRUN:
+ *
+ * MID-LAYER UNDERFLOW case:
+ * Some kernels do not properly detect midlayer
+ * underflow, so we manually check it and return
+ * ERROR if the minimum required data was not
+ * received.
+ *
+ * ALL OTHER cases:
+ * Fall thru to check scsi_status
+ */
+ if (!scsi_status && (scsi_bufflen(cmd) - residual) <
+ cmd->underflow) {
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld:%d:%d:%llu: %s: Mid-layer Data underrun, xferlen = 0x%x,residual = 0x%x\n",
+ ha->host_no,
+ cmd->device->channel,
+ cmd->device->id,
+ cmd->device->lun, __func__,
+ scsi_bufflen(cmd),
+ residual));
+
+ cmd->result = DID_ERROR << 16;
+ break;
+ }
+
+ } else if (scsi_status != SAM_STAT_TASK_SET_FULL &&
+ scsi_status != SAM_STAT_BUSY) {
+
+ /*
+ * The firmware reports UNDERRUN, but the target does
+ * not report it:
+ *
+ * scsi_status | host_byte device_byte
+ * | (19:16) (7:0)
+ * ============= | ========= ===========
+ * TASK_SET_FULL | DID_OK scsi_status
+ * BUSY | DID_OK scsi_status
+ * ALL OTHERS | DID_ERROR scsi_status
+ *
+ * Note: If scsi_status is task set full or busy,
+ * then this else if would fall thru to check the
+ * scsi_status and return DID_OK.
+ */
+
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld:%d:%d:%llu: %s: Dropped frame(s) detected (0x%x of 0x%x bytes).\n",
+ ha->host_no,
+ cmd->device->channel,
+ cmd->device->id,
+ cmd->device->lun, __func__,
+ residual,
+ scsi_bufflen(cmd)));
+
+ cmd->result = DID_ERROR << 16 | scsi_status;
+ goto check_scsi_status;
+ }
+
+ cmd->result = DID_OK << 16 | scsi_status;
+
+check_scsi_status:
+ if (scsi_status == SAM_STAT_CHECK_CONDITION)
+ qla4xxx_copy_sense(ha, sts_entry, srb);
+
+ break;
+
+ case SCS_DEVICE_LOGGED_OUT:
+ case SCS_DEVICE_UNAVAILABLE:
+ DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%llu: SCS_DEVICE "
+ "state: 0x%x\n", ha->host_no,
+ cmd->device->channel, cmd->device->id,
+ cmd->device->lun, sts_entry->completionStatus));
+ /*
+ * 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 (iscsi_is_session_online(ddb_entry->sess))
+ qla4xxx_mark_device_missing(ddb_entry->sess);
+
+ cmd->result = DID_TRANSPORT_DISRUPTED << 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:%llu: %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)
+ kref_put(&srb->srb_ref, qla4xxx_srb_compl);
+}
+
+/**
+ * qla4xxx_passthru_status_entry - processes passthru status IOCBs (0x3C)
+ * @ha: Pointer to host adapter structure.
+ * @sts_entry: Pointer to status entry structure.
+ **/
+static void qla4xxx_passthru_status_entry(struct scsi_qla_host *ha,
+ struct passthru_status *sts_entry)
+{
+ struct iscsi_task *task;
+ struct ddb_entry *ddb_entry;
+ struct ql4_task_data *task_data;
+ struct iscsi_cls_conn *cls_conn;
+ struct iscsi_conn *conn;
+ itt_t itt;
+ uint32_t fw_ddb_index;
+
+ itt = sts_entry->handle;
+ fw_ddb_index = le32_to_cpu(sts_entry->target);
+
+ ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
+
+ if (ddb_entry == NULL) {
+ ql4_printk(KERN_ERR, ha, "%s: Invalid target index = 0x%x\n",
+ __func__, sts_entry->target);
+ return;
+ }
+
+ cls_conn = ddb_entry->conn;
+ conn = cls_conn->dd_data;
+ spin_lock(&conn->session->back_lock);
+ task = iscsi_itt_to_task(conn, itt);
+ spin_unlock(&conn->session->back_lock);
+
+ if (task == NULL) {
+ ql4_printk(KERN_ERR, ha, "%s: Task is NULL\n", __func__);
+ return;
+ }
+
+ task_data = task->dd_data;
+ memcpy(&task_data->sts, sts_entry, sizeof(struct passthru_status));
+ ha->iocb_cnt -= task_data->iocb_req_cnt;
+ queue_work(ha->task_wq, &task_data->task_work);
+}
+
+static struct mrb *qla4xxx_del_mrb_from_active_array(struct scsi_qla_host *ha,
+ uint32_t index)
+{
+ struct mrb *mrb = NULL;
+
+ /* validate handle and remove from active array */
+ if (index >= MAX_MRB)
+ return mrb;
+
+ mrb = ha->active_mrb_array[index];
+ ha->active_mrb_array[index] = NULL;
+ if (!mrb)
+ return mrb;
+
+ /* update counters */
+ ha->iocb_cnt -= mrb->iocb_cnt;
+
+ return mrb;
+}
+
+static void qla4xxx_mbox_status_entry(struct scsi_qla_host *ha,
+ struct mbox_status_iocb *mbox_sts_entry)
+{
+ struct mrb *mrb;
+ uint32_t status;
+ uint32_t data_size;
+
+ mrb = qla4xxx_del_mrb_from_active_array(ha,
+ le32_to_cpu(mbox_sts_entry->handle));
+
+ if (mrb == NULL) {
+ ql4_printk(KERN_WARNING, ha, "%s: mrb[%d] is null\n", __func__,
+ mbox_sts_entry->handle);
+ return;
+ }
+
+ switch (mrb->mbox_cmd) {
+ case MBOX_CMD_PING:
+ DEBUG2(ql4_printk(KERN_INFO, ha, "%s: mbox_cmd = 0x%x, "
+ "mbox_sts[0] = 0x%x, mbox_sts[6] = 0x%x\n",
+ __func__, mrb->mbox_cmd,
+ mbox_sts_entry->out_mbox[0],
+ mbox_sts_entry->out_mbox[6]));
+
+ if (mbox_sts_entry->out_mbox[0] == MBOX_STS_COMMAND_COMPLETE)
+ status = ISCSI_PING_SUCCESS;
+ else
+ status = mbox_sts_entry->out_mbox[6];
+
+ data_size = sizeof(mbox_sts_entry->out_mbox);
+
+ qla4xxx_post_ping_evt_work(ha, status, mrb->pid, data_size,
+ (uint8_t *) mbox_sts_entry->out_mbox);
+ break;
+
+ default:
+ DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: invalid mbox_cmd = "
+ "0x%x\n", __func__, mrb->mbox_cmd));
+ }
+
+ kfree(mrb);
+ return;
+}
+
+/**
+ * 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
+ **/
+void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
+{
+ uint32_t count = 0;
+ struct srb *srb = NULL;
+ struct status_entry *sts_entry;
+
+ /* Process all responses from response queue */
+ while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
+ 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:
+ /* Common status */
+ qla4xxx_status_entry(ha, sts_entry);
+ break;
+
+ case ET_PASSTHRU_STATUS:
+ if (sts_entry->hdr.systemDefined == SD_ISCSI_PDU)
+ qla4xxx_passthru_status_entry(ha,
+ (struct passthru_status *)sts_entry);
+ else
+ ql4_printk(KERN_ERR, ha,
+ "%s: Invalid status received\n",
+ __func__);
+
+ break;
+
+ 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;
+ kref_put(&srb->srb_ref, qla4xxx_srb_compl);
+ break;
+
+ case ET_CONTINUE:
+ /* Just throw away the continuation entries */
+ DEBUG2(printk("scsi%ld: %s: Continuation entry - "
+ "ignoring\n", ha->host_no, __func__));
+ break;
+
+ case ET_MBOX_STATUS:
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "%s: mbox status IOCB\n", __func__));
+ qla4xxx_mbox_status_entry(ha,
+ (struct mbox_status_iocb *)sts_entry);
+ 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));
+ goto exit_prq_error;
+ }
+ ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
+ wmb();
+ }
+
+ /*
+ * Tell ISP we're done with response(s). This also clears the interrupt.
+ */
+ ha->isp_ops->complete_iocb(ha);
+
+ return;
+
+exit_prq_invalid_handle:
+ DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
+ ha->host_no, __func__, srb, sts_entry->hdr.entryType,
+ sts_entry->completionStatus));
+
+exit_prq_error:
+ ha->isp_ops->complete_iocb(ha);
+ set_bit(DPC_RESET_HA, &ha->dpc_flags);
+}
+
+/**
+ * qla4_83xx_loopback_in_progress: Is loopback in progress?
+ * @ha: Pointer to host adapter structure.
+ * @ret: 1 = loopback in progress, 0 = loopback not in progress
+ **/
+static int qla4_83xx_loopback_in_progress(struct scsi_qla_host *ha)
+{
+ int rval = 1;
+
+ if (is_qla8032(ha) || is_qla8042(ha)) {
+ if ((ha->idc_info.info2 & ENABLE_INTERNAL_LOOPBACK) ||
+ (ha->idc_info.info2 & ENABLE_EXTERNAL_LOOPBACK)) {
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "%s: Loopback diagnostics in progress\n",
+ __func__));
+ rval = 1;
+ } else {
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "%s: Loopback diagnostics not in progress\n",
+ __func__));
+ rval = 0;
+ }
+ }
+
+ return rval;
+}
+
+static void qla4xxx_update_ipaddr_state(struct scsi_qla_host *ha,
+ uint32_t ipaddr_idx,
+ uint32_t ipaddr_fw_state)
+{
+ uint8_t ipaddr_state;
+ uint8_t ip_idx;
+
+ ip_idx = ipaddr_idx & 0xF;
+ ipaddr_state = qla4xxx_set_ipaddr_state((uint8_t)ipaddr_fw_state);
+
+ switch (ip_idx) {
+ case 0:
+ ha->ip_config.ipv4_addr_state = ipaddr_state;
+ break;
+ case 1:
+ ha->ip_config.ipv6_link_local_state = ipaddr_state;
+ break;
+ case 2:
+ ha->ip_config.ipv6_addr0_state = ipaddr_state;
+ break;
+ case 3:
+ ha->ip_config.ipv6_addr1_state = ipaddr_state;
+ break;
+ default:
+ ql4_printk(KERN_INFO, ha, "%s: Invalid IPADDR index %d\n",
+ __func__, ip_idx);
+ }
+}
+
+static void qla4xxx_default_router_changed(struct scsi_qla_host *ha,
+ uint32_t *mbox_sts)
+{
+ memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[0],
+ &mbox_sts[2], sizeof(uint32_t));
+ memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[1],
+ &mbox_sts[3], sizeof(uint32_t));
+ memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[2],
+ &mbox_sts[4], sizeof(uint32_t));
+ memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[3],
+ &mbox_sts[5], sizeof(uint32_t));
+}
+
+/**
+ * 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_sts[MBOX_AEN_REG_COUNT];
+ __le32 __iomem *mailbox_out;
+ uint32_t opcode = 0;
+
+ if (is_qla8032(ha) || is_qla8042(ha))
+ mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0];
+ else if (is_qla8022(ha))
+ mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0];
+ else
+ mailbox_out = &ha->reg->mailbox[0];
+
+ 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 = 0; i < ha->mbox_status_count; i++)
+ ha->mbox_status[i] = readl(&mailbox_out[i]);
+
+ set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
+
+ if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
+ complete(&ha->mbx_intr_comp);
+ }
+ } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
+ for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
+ mbox_sts[i] = readl(&mailbox_out[i]);
+
+ /* Immediately process the AENs that don't require much work.
+ * Only queue the database_changed AENs */
+ if (ha->aen_log.count < MAX_AEN_ENTRIES) {
+ for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
+ ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
+ mbox_sts[i];
+ ha->aen_log.count++;
+ }
+ switch (mbox_status) {
+ case MBOX_ASTS_SYSTEM_ERROR:
+ /* Log Mailbox registers */
+ ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
+ qla4xxx_dump_registers(ha);
+
+ if ((is_qla8022(ha) && ql4xdontresethba) ||
+ ((is_qla8032(ha) || is_qla8042(ha)) &&
+ qla4_83xx_idc_dontreset(ha))) {
+ DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
+ ha->host_no, __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));
+ if (is_qla80XX(ha))
+ set_bit(DPC_RESET_HA_FW_CONTEXT,
+ &ha->dpc_flags);
+ else
+ set_bit(DPC_RESET_HA, &ha->dpc_flags);
+ break;
+
+ case MBOX_ASTS_LINK_UP:
+ set_bit(AF_LINK_UP, &ha->flags);
+ if (test_bit(AF_INIT_DONE, &ha->flags))
+ set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
+
+ ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
+ qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP,
+ sizeof(mbox_sts),
+ (uint8_t *) mbox_sts);
+
+ if ((is_qla8032(ha) || is_qla8042(ha)) &&
+ ha->notify_link_up_comp)
+ complete(&ha->link_up_comp);
+
+ break;
+
+ case MBOX_ASTS_LINK_DOWN:
+ clear_bit(AF_LINK_UP, &ha->flags);
+ if (test_bit(AF_INIT_DONE, &ha->flags)) {
+ set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
+ qla4xxx_wake_dpc(ha);
+ }
+
+ ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
+ qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
+ sizeof(mbox_sts),
+ (uint8_t *) mbox_sts);
+ 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:
+ case MBOX_ASTS_DUPLICATE_IP:
+ /* No action */
+ DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
+ mbox_status));
+ break;
+
+ case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
+ printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
+ "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
+ mbox_sts[2], mbox_sts[3]);
+
+ qla4xxx_update_ipaddr_state(ha, mbox_sts[5],
+ mbox_sts[3]);
+ /* mbox_sts[2] = Old ACB state
+ * mbox_sts[3] = new ACB state */
+ if ((mbox_sts[3] == IP_ADDRSTATE_PREFERRED) &&
+ ((mbox_sts[2] == IP_ADDRSTATE_TENTATIVE) ||
+ (mbox_sts[2] == IP_ADDRSTATE_ACQUIRING))) {
+ set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
+ } else if ((mbox_sts[3] == IP_ADDRSTATE_ACQUIRING) &&
+ (mbox_sts[2] == IP_ADDRSTATE_PREFERRED)) {
+ if (is_qla80XX(ha))
+ set_bit(DPC_RESET_HA_FW_CONTEXT,
+ &ha->dpc_flags);
+ else
+ set_bit(DPC_RESET_HA, &ha->dpc_flags);
+ } else if (mbox_sts[3] == IP_ADDRSTATE_DISABLING) {
+ ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB in disabling state\n",
+ ha->host_no, __func__);
+ } else if (mbox_sts[3] == IP_ADDRSTATE_UNCONFIGURED) {
+ complete(&ha->disable_acb_comp);
+ ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB state unconfigured\n",
+ ha->host_no, __func__);
+ }
+ break;
+
+ case MBOX_ASTS_IPV6_LINK_MTU_CHANGE:
+ case MBOX_ASTS_IPV6_AUTO_PREFIX_IGNORED:
+ case MBOX_ASTS_IPV6_ND_LOCAL_PREFIX_IGNORED:
+ /* No action */
+ DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld: AEN %04x\n",
+ ha->host_no, mbox_status));
+ break;
+
+ case MBOX_ASTS_ICMPV6_ERROR_MSG_RCVD:
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x, IPv6 ERROR, "
+ "mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3}=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
+ ha->host_no, mbox_sts[0], mbox_sts[1],
+ mbox_sts[2], mbox_sts[3], mbox_sts[4],
+ mbox_sts[5]));
+ 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_sts[0],
+ mbox_sts[1], mbox_sts[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_sts[0], mbox_sts[1],
+ mbox_sts[2], mbox_sts[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 = 0; i < MBOX_AEN_REG_COUNT; i++)
+ ha->aen_q[ha->aen_in].mbox_sts[i] =
+ mbox_sts[i];
+
+ /* print debug message */
+ DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
+ "mb1:0x%x mb2:0x%x mb3:0x%x "
+ "mb4:0x%x mb5:0x%x\n",
+ ha->host_no, ha->aen_in,
+ mbox_sts[0], mbox_sts[1],
+ mbox_sts[2], mbox_sts[3],
+ mbox_sts[4], mbox_sts[5]));
+
+ /* 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_sts[0]));
+
+ 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, mbox_sts[0],
+ mbox_sts[1], mbox_sts[2],
+ mbox_sts[3]));
+ }
+ }
+ break;
+
+ case MBOX_ASTS_TXSCVR_INSERTED:
+ DEBUG2(printk(KERN_WARNING
+ "scsi%ld: AEN %04x Transceiver"
+ " inserted\n", ha->host_no, mbox_sts[0]));
+ break;
+
+ case MBOX_ASTS_TXSCVR_REMOVED:
+ DEBUG2(printk(KERN_WARNING
+ "scsi%ld: AEN %04x Transceiver"
+ " removed\n", ha->host_no, mbox_sts[0]));
+ break;
+
+ case MBOX_ASTS_IDC_REQUEST_NOTIFICATION:
+ if (is_qla8032(ha) || is_qla8042(ha)) {
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
+ ha->host_no, mbox_sts[0],
+ mbox_sts[1], mbox_sts[2],
+ mbox_sts[3], mbox_sts[4]));
+ opcode = mbox_sts[1] >> 16;
+ if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
+ (opcode == MBOX_CMD_PORT_RESET)) {
+ set_bit(DPC_POST_IDC_ACK,
+ &ha->dpc_flags);
+ ha->idc_info.request_desc = mbox_sts[1];
+ ha->idc_info.info1 = mbox_sts[2];
+ ha->idc_info.info2 = mbox_sts[3];
+ ha->idc_info.info3 = mbox_sts[4];
+ qla4xxx_wake_dpc(ha);
+ }
+ }
+ break;
+
+ case MBOX_ASTS_IDC_COMPLETE:
+ if (is_qla8032(ha) || is_qla8042(ha)) {
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
+ ha->host_no, mbox_sts[0],
+ mbox_sts[1], mbox_sts[2],
+ mbox_sts[3], mbox_sts[4]));
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi:%ld: AEN %04x IDC Complete notification\n",
+ ha->host_no, mbox_sts[0]));
+
+ opcode = mbox_sts[1] >> 16;
+ if (ha->notify_idc_comp)
+ complete(&ha->idc_comp);
+
+ if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
+ (opcode == MBOX_CMD_PORT_RESET))
+ ha->idc_info.info2 = mbox_sts[3];
+
+ if (qla4_83xx_loopback_in_progress(ha)) {
+ set_bit(AF_LOOPBACK, &ha->flags);
+ } else {
+ clear_bit(AF_LOOPBACK, &ha->flags);
+ if (ha->saved_acb)
+ set_bit(DPC_RESTORE_ACB,
+ &ha->dpc_flags);
+ }
+ qla4xxx_wake_dpc(ha);
+ }
+ break;
+
+ case MBOX_ASTS_IPV6_DEFAULT_ROUTER_CHANGED:
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
+ ha->host_no, mbox_sts[0], mbox_sts[1],
+ mbox_sts[2], mbox_sts[3], mbox_sts[4],
+ mbox_sts[5]));
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x Received IPv6 default router changed notification\n",
+ ha->host_no, mbox_sts[0]));
+ qla4xxx_default_router_changed(ha, mbox_sts);
+ break;
+
+ case MBOX_ASTS_IDC_TIME_EXTEND_NOTIFICATION:
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
+ ha->host_no, mbox_sts[0], mbox_sts[1],
+ mbox_sts[2], mbox_sts[3], mbox_sts[4],
+ mbox_sts[5]));
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x Received IDC Extend Timeout notification\n",
+ ha->host_no, mbox_sts[0]));
+ /* new IDC timeout */
+ ha->idc_extend_tmo = mbox_sts[1];
+ break;
+
+ case MBOX_ASTS_INITIALIZATION_FAILED:
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x, mbox_sts[3]=%08x\n",
+ ha->host_no, mbox_sts[0],
+ mbox_sts[3]));
+ break;
+
+ case MBOX_ASTS_SYSTEM_WARNING_EVENT:
+ DEBUG2(ql4_printk(KERN_WARNING, ha,
+ "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
+ ha->host_no, mbox_sts[0], mbox_sts[1],
+ mbox_sts[2], mbox_sts[3], mbox_sts[4],
+ mbox_sts[5]));
+ break;
+
+ case MBOX_ASTS_DCBX_CONF_CHANGE:
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
+ ha->host_no, mbox_sts[0], mbox_sts[1],
+ mbox_sts[2], mbox_sts[3], mbox_sts[4],
+ mbox_sts[5]));
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x Received DCBX configuration changed notification\n",
+ ha->host_no, mbox_sts[0]));
+ break;
+
+ default:
+ DEBUG2(printk(KERN_WARNING
+ "scsi%ld: AEN %04x UNKNOWN\n",
+ ha->host_no, mbox_sts[0]));
+ break;
+ }
+ } else {
+ DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
+ ha->host_no, mbox_status));
+
+ ha->mbox_status[0] = mbox_status;
+ }
+}
+
+void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha,
+ uint32_t intr_status)
+{
+ /* Process mailbox/asynch event interrupt.*/
+ if (intr_status) {
+ qla4xxx_isr_decode_mailbox(ha,
+ readl(&ha->qla4_83xx_reg->mailbox_out[0]));
+ /* clear the interrupt */
+ writel(0, &ha->qla4_83xx_reg->risc_intr);
+ } else {
+ qla4xxx_process_response_queue(ha);
+ }
+
+ /* clear the interrupt */
+ writel(0, &ha->qla4_83xx_reg->mb_int_mask);
+}
+
+/**
+ * qla4_82xx_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 qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha,
+ uint32_t intr_status)
+{
+ /* Process response queue interrupt. */
+ if ((intr_status & HSRX_RISC_IOCB_INT) &&
+ test_bit(AF_INIT_DONE, &ha->flags))
+ qla4xxx_process_response_queue(ha);
+
+ /* Process mailbox/asynch event interrupt.*/
+ if (intr_status & HSRX_RISC_MB_INT)
+ qla4xxx_isr_decode_mailbox(ha,
+ readl(&ha->qla4_82xx_reg->mailbox_out[0]));
+
+ /* clear the interrupt */
+ writel(0, &ha->qla4_82xx_reg->host_int);
+ readl(&ha->qla4_82xx_reg->host_int);
+}
+
+/**
+ * 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);
+ }
+}
+
+/**
+ * qla4_82xx_spurious_interrupt - processes spurious interrupt
+ * @ha: pointer to host adapter structure.
+ * @reqs_count: .
+ *
+ **/
+static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha,
+ uint8_t reqs_count)
+{
+ if (reqs_count)
+ return;
+
+ DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
+ if (is_qla8022(ha)) {
+ writel(0, &ha->qla4_82xx_reg->host_int);
+ if (test_bit(AF_INTx_ENABLED, &ha->flags))
+ qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
+ 0xfbff);
+ }
+ ha->spurious_int_count++;
+}
+
+/**
+ * qla4xxx_intr_handler - hardware interrupt handler.
+ * @irq: Unused
+ * @dev_id: Pointer to host adapter structure
+ **/
+irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
+{
+ 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);
+
+ ha->isr_count++;
+ /*
+ * Repeatedly service interrupts up to a maximum of
+ * MAX_REQS_SERVICED_PER_INTR
+ */
+ while (1) {
+ /*
+ * Read interrupt status
+ */
+ if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
+ 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);
+ __qla4xxx_disable_intrs(ha);
+
+ writel(set_rmask(CSR_SCSI_RESET_INTR),
+ &ha->reg->ctrl_status);
+ readl(&ha->reg->ctrl_status);
+
+ if (!test_bit(AF_HA_REMOVAL, &ha->flags))
+ set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
+
+ break;
+ } else if (intr_status & INTR_PENDING) {
+ ha->isp_ops->interrupt_service_routine(ha, intr_status);
+ ha->total_io_count++;
+ if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * qla4_82xx_intr_handler - hardware interrupt handler.
+ * @irq: Unused
+ * @dev_id: Pointer to host adapter structure
+ **/
+irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id)
+{
+ struct scsi_qla_host *ha = dev_id;
+ uint32_t intr_status;
+ uint32_t status;
+ unsigned long flags = 0;
+ uint8_t reqs_count = 0;
+
+ if (unlikely(pci_channel_offline(ha->pdev)))
+ return IRQ_HANDLED;
+
+ ha->isr_count++;
+ status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
+ if (!(status & ha->nx_legacy_intr.int_vec_bit))
+ return IRQ_NONE;
+
+ status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG);
+ if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
+ DEBUG7(ql4_printk(KERN_INFO, ha,
+ "%s legacy Int not triggered\n", __func__));
+ return IRQ_NONE;
+ }
+
+ /* clear the interrupt */
+ qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
+
+ /* read twice to ensure write is flushed */
+ qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
+ qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
+
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+ while (1) {
+ if (!(readl(&ha->qla4_82xx_reg->host_int) &
+ ISRX_82XX_RISC_INT)) {
+ qla4_82xx_spurious_interrupt(ha, reqs_count);
+ break;
+ }
+ intr_status = readl(&ha->qla4_82xx_reg->host_status);
+ if ((intr_status &
+ (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
+ qla4_82xx_spurious_interrupt(ha, reqs_count);
+ break;
+ }
+
+ ha->isp_ops->interrupt_service_routine(ha, intr_status);
+
+ /* Enable Interrupt */
+ qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
+
+ if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
+ break;
+ }
+
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ return IRQ_HANDLED;
+}
+
+#define LEG_INT_PTR_B31 (1 << 31)
+#define LEG_INT_PTR_B30 (1 << 30)
+#define PF_BITS_MASK (0xF << 16)
+
+/**
+ * qla4_83xx_intr_handler - hardware interrupt handler.
+ * @irq: Unused
+ * @dev_id: Pointer to host adapter structure
+ **/
+irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id)
+{
+ struct scsi_qla_host *ha = dev_id;
+ uint32_t leg_int_ptr = 0;
+ unsigned long flags = 0;
+
+ ha->isr_count++;
+ leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
+
+ /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */
+ if (!(leg_int_ptr & LEG_INT_PTR_B31)) {
+ DEBUG7(ql4_printk(KERN_ERR, ha,
+ "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n",
+ __func__));
+ return IRQ_NONE;
+ }
+
+ /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */
+ if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) {
+ DEBUG7(ql4_printk(KERN_ERR, ha,
+ "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n",
+ __func__, (leg_int_ptr & PF_BITS_MASK),
+ ha->pf_bit));
+ return IRQ_NONE;
+ }
+
+ /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger
+ * Control register and poll till Legacy Interrupt Pointer register
+ * bit30 is 0.
+ */
+ writel(0, &ha->qla4_83xx_reg->leg_int_trig);
+ do {
+ leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
+ if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit)
+ break;
+ } while (leg_int_ptr & LEG_INT_PTR_B30);
+
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+ leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr);
+ ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr);
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+irqreturn_t
+qla4_8xxx_msi_handler(int irq, void *dev_id)
+{
+ struct scsi_qla_host *ha;
+
+ ha = (struct scsi_qla_host *) dev_id;
+ if (!ha) {
+ DEBUG2(printk(KERN_INFO
+ "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
+ return IRQ_NONE;
+ }
+
+ ha->isr_count++;
+ /* clear the interrupt */
+ qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
+
+ /* read twice to ensure write is flushed */
+ qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
+ qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
+
+ return qla4_8xxx_default_intr_handler(irq, dev_id);
+}
+
+static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id)
+{
+ struct scsi_qla_host *ha = dev_id;
+ unsigned long flags;
+ uint32_t ival = 0;
+
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+
+ ival = readl(&ha->qla4_83xx_reg->risc_intr);
+ if (ival == 0) {
+ ql4_printk(KERN_INFO, ha,
+ "%s: It is a spurious mailbox interrupt!\n",
+ __func__);
+ ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
+ ival &= ~INT_MASK_FW_MB;
+ writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
+ goto exit;
+ }
+
+ qla4xxx_isr_decode_mailbox(ha,
+ readl(&ha->qla4_83xx_reg->mailbox_out[0]));
+ writel(0, &ha->qla4_83xx_reg->risc_intr);
+ ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
+ ival &= ~INT_MASK_FW_MB;
+ writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
+ ha->isr_count++;
+exit:
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ return IRQ_HANDLED;
+}
+
+/**
+ * qla4_8xxx_default_intr_handler - hardware interrupt handler.
+ * @irq: Unused
+ * @dev_id: Pointer to host adapter structure
+ *
+ * This interrupt handler is called directly for MSI-X, and
+ * called indirectly for MSI.
+ **/
+irqreturn_t
+qla4_8xxx_default_intr_handler(int irq, void *dev_id)
+{
+ struct scsi_qla_host *ha = dev_id;
+ unsigned long flags;
+ uint32_t intr_status;
+ uint8_t reqs_count = 0;
+
+ if (is_qla8032(ha) || is_qla8042(ha)) {
+ qla4_83xx_mailbox_intr_handler(irq, dev_id);
+ } else {
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+ while (1) {
+ if (!(readl(&ha->qla4_82xx_reg->host_int) &
+ ISRX_82XX_RISC_INT)) {
+ qla4_82xx_spurious_interrupt(ha, reqs_count);
+ break;
+ }
+
+ intr_status = readl(&ha->qla4_82xx_reg->host_status);
+ if ((intr_status &
+ (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
+ qla4_82xx_spurious_interrupt(ha, reqs_count);
+ break;
+ }
+
+ ha->isp_ops->interrupt_service_routine(ha, intr_status);
+
+ if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
+ break;
+ }
+ ha->isr_count++;
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ }
+ return IRQ_HANDLED;
+}
+
+irqreturn_t
+qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
+{
+ struct scsi_qla_host *ha = dev_id;
+ unsigned long flags;
+ int intr_status;
+ uint32_t ival = 0;
+
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+ if (is_qla8032(ha) || is_qla8042(ha)) {
+ ival = readl(&ha->qla4_83xx_reg->iocb_int_mask);
+ if (ival == 0) {
+ ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n",
+ __func__);
+ goto exit_msix_rsp_q;
+ }
+ qla4xxx_process_response_queue(ha);
+ writel(0, &ha->qla4_83xx_reg->iocb_int_mask);
+ } else {
+ intr_status = readl(&ha->qla4_82xx_reg->host_status);
+ if (intr_status & HSRX_RISC_IOCB_INT) {
+ qla4xxx_process_response_queue(ha);
+ writel(0, &ha->qla4_82xx_reg->host_int);
+ } else {
+ ql4_printk(KERN_INFO, ha, "%s: spurious iocb interrupt...\n",
+ __func__);
+ goto exit_msix_rsp_q;
+ }
+ }
+ ha->isr_count++;
+exit_msix_rsp_q:
+ 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
+ **/
+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;
+
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+ 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;
+
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+ DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
+ " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
+ (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
+ mbox_sts[0], mbox_sts[1], mbox_sts[2],
+ mbox_sts[3], mbox_sts[4]));
+
+ switch (mbox_sts[0]) {
+ case MBOX_ASTS_DATABASE_CHANGED:
+ switch (process_aen) {
+ case FLUSH_DDB_CHANGED_AENS:
+ DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
+ "[%d] state=%04x FLUSHED!\n",
+ ha->host_no, ha->aen_out,
+ mbox_sts[0], mbox_sts[2],
+ mbox_sts[3]));
+ break;
+ case PROCESS_ALL_AENS:
+ default:
+ /* Specific device. */
+ if (mbox_sts[1] == 1)
+ qla4xxx_process_ddb_changed(ha,
+ mbox_sts[2], mbox_sts[3],
+ mbox_sts[4]);
+ break;
+ }
+ }
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+ }
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+}
+
+int qla4xxx_request_irqs(struct scsi_qla_host *ha)
+{
+ int ret = 0;
+ int rval = QLA_ERROR;
+
+ if (is_qla40XX(ha))
+ goto try_intx;
+
+ if (ql4xenablemsix == 2) {
+ /* Note: MSI Interrupts not supported for ISP8324 and ISP8042 */
+ if (is_qla8032(ha) || is_qla8042(ha)) {
+ ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP%04x, Falling back-to INTx mode\n",
+ __func__, ha->pdev->device);
+ goto try_intx;
+ }
+ goto try_msi;
+ }
+
+ if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
+ goto try_intx;
+
+ /* Trying MSI-X */
+ ret = qla4_8xxx_enable_msix(ha);
+ if (!ret) {
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "MSI-X: Enabled (0x%X).\n", ha->revision_id));
+ goto irq_attached;
+ } else {
+ if (is_qla8032(ha) || is_qla8042(ha)) {
+ ql4_printk(KERN_INFO, ha, "%s: ISP%04x: MSI-X: Falling back-to INTx mode. ret = %d\n",
+ __func__, ha->pdev->device, ret);
+ goto try_intx;
+ }
+ }
+
+ ql4_printk(KERN_WARNING, ha,
+ "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
+
+try_msi:
+ /* Trying MSI */
+ ret = pci_enable_msi(ha->pdev);
+ if (!ret) {
+ ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
+ 0, DRIVER_NAME, ha);
+ if (!ret) {
+ DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
+ set_bit(AF_MSI_ENABLED, &ha->flags);
+ goto irq_attached;
+ } else {
+ ql4_printk(KERN_WARNING, ha,
+ "MSI: Failed to reserve interrupt %d "
+ "already in use.\n", ha->pdev->irq);
+ pci_disable_msi(ha->pdev);
+ }
+ }
+
+try_intx:
+ if (is_qla8022(ha)) {
+ ql4_printk(KERN_WARNING, ha, "%s: ISP82xx Legacy interrupt not supported\n",
+ __func__);
+ goto irq_not_attached;
+ }
+
+ /* Trying INTx */
+ ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
+ IRQF_SHARED, DRIVER_NAME, ha);
+ if (!ret) {
+ DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
+ set_bit(AF_INTx_ENABLED, &ha->flags);
+ goto irq_attached;
+
+ } else {
+ ql4_printk(KERN_WARNING, ha,
+ "INTx: Failed to reserve interrupt %d already in"
+ " use.\n", ha->pdev->irq);
+ goto irq_not_attached;
+ }
+
+irq_attached:
+ set_bit(AF_IRQ_ATTACHED, &ha->flags);
+ ha->host->irq = ha->pdev->irq;
+ ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
+ __func__, ha->pdev->irq);
+ rval = QLA_SUCCESS;
+irq_not_attached:
+ return rval;
+}
+
+void qla4xxx_free_irqs(struct scsi_qla_host *ha)
+{
+ if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) {
+ if (test_bit(AF_MSIX_ENABLED, &ha->flags)) {
+ qla4_8xxx_disable_msix(ha);
+ } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
+ free_irq(ha->pdev->irq, ha);
+ pci_disable_msi(ha->pdev);
+ } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) {
+ free_irq(ha->pdev->irq, ha);
+ }
+ }
+}
Code Review / kvmfornfv.git / blobdiff