1679 lines
45 KiB
C
1679 lines
45 KiB
C
/*
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* QLogic iSCSI HBA Driver
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* Copyright (c) 2003-2006 QLogic Corporation
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*
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* See LICENSE.qla4xxx for copyright and licensing details.
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*/
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#include <linux/moduleparam.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsicam.h>
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#include "ql4_def.h"
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/*
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* Driver version
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*/
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char qla4xxx_version_str[40];
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/*
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* SRB allocation cache
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*/
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static kmem_cache_t *srb_cachep;
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/*
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* Module parameter information and variables
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*/
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int ql4xdiscoverywait = 60;
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module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
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MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
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int ql4xdontresethba = 0;
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module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
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MODULE_PARM_DESC(ql4xdontresethba,
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"Dont reset the HBA when the driver gets 0x8002 AEN "
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" default it will reset hba :0"
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" set to 1 to avoid resetting HBA");
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int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
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module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR);
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MODULE_PARM_DESC(ql4xextended_error_logging,
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"Option to enable extended error logging, "
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"Default is 0 - no logging, 1 - debug logging");
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/*
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* SCSI host template entry points
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*/
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void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
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/*
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* iSCSI template entry points
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*/
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static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
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uint32_t enable, struct sockaddr *dst_addr);
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static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
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enum iscsi_param param, char *buf);
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static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
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enum iscsi_param param, char *buf);
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static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag);
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static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
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static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
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/*
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* SCSI host template entry points
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*/
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static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
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void (*done) (struct scsi_cmnd *));
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static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
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static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
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static int qla4xxx_slave_alloc(struct scsi_device *device);
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static int qla4xxx_slave_configure(struct scsi_device *device);
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static void qla4xxx_slave_destroy(struct scsi_device *sdev);
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static struct scsi_host_template qla4xxx_driver_template = {
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.module = THIS_MODULE,
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.name = DRIVER_NAME,
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.proc_name = DRIVER_NAME,
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.queuecommand = qla4xxx_queuecommand,
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.eh_device_reset_handler = qla4xxx_eh_device_reset,
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.eh_host_reset_handler = qla4xxx_eh_host_reset,
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.slave_configure = qla4xxx_slave_configure,
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.slave_alloc = qla4xxx_slave_alloc,
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.slave_destroy = qla4xxx_slave_destroy,
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.this_id = -1,
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.cmd_per_lun = 3,
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.use_clustering = ENABLE_CLUSTERING,
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.sg_tablesize = SG_ALL,
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.max_sectors = 0xFFFF,
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};
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static struct iscsi_transport qla4xxx_iscsi_transport = {
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.owner = THIS_MODULE,
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.name = DRIVER_NAME,
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.param_mask = ISCSI_CONN_PORT |
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ISCSI_CONN_ADDRESS |
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ISCSI_TARGET_NAME |
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ISCSI_TPGT,
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.sessiondata_size = sizeof(struct ddb_entry),
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.host_template = &qla4xxx_driver_template,
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.tgt_dscvr = qla4xxx_tgt_dscvr,
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.get_conn_param = qla4xxx_conn_get_param,
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.get_session_param = qla4xxx_sess_get_param,
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.start_conn = qla4xxx_conn_start,
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.stop_conn = qla4xxx_conn_stop,
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.session_recovery_timedout = qla4xxx_recovery_timedout,
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};
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static struct scsi_transport_template *qla4xxx_scsi_transport;
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static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
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{
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struct ddb_entry *ddb_entry = session->dd_data;
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struct scsi_qla_host *ha = ddb_entry->ha;
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DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) "
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"secs exhausted, marking device DEAD.\n", ha->host_no,
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__func__, ddb_entry->fw_ddb_index,
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ha->port_down_retry_count));
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atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
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DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = "
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"0x%lx\n", ha->host_no, __func__, ha->dpc_flags));
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queue_work(ha->dpc_thread, &ha->dpc_work);
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}
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static int qla4xxx_conn_start(struct iscsi_cls_conn *conn)
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{
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struct iscsi_cls_session *session;
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struct ddb_entry *ddb_entry;
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session = iscsi_dev_to_session(conn->dev.parent);
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ddb_entry = session->dd_data;
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DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n",
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ddb_entry->ha->host_no, __func__,
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ddb_entry->fw_ddb_index));
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iscsi_unblock_session(session);
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return 0;
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}
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static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag)
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{
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struct iscsi_cls_session *session;
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struct ddb_entry *ddb_entry;
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session = iscsi_dev_to_session(conn->dev.parent);
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ddb_entry = session->dd_data;
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DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n",
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ddb_entry->ha->host_no, __func__,
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ddb_entry->fw_ddb_index));
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if (flag == STOP_CONN_RECOVER)
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iscsi_block_session(session);
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else
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printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag);
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}
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static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
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enum iscsi_param param, char *buf)
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{
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struct ddb_entry *ddb_entry = sess->dd_data;
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int len;
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switch (param) {
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case ISCSI_PARAM_TARGET_NAME:
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len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
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ddb_entry->iscsi_name);
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break;
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case ISCSI_PARAM_TPGT:
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len = sprintf(buf, "%u\n", ddb_entry->tpgt);
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break;
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default:
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return -ENOSYS;
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}
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return len;
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}
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static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
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enum iscsi_param param, char *buf)
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{
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struct iscsi_cls_session *session;
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struct ddb_entry *ddb_entry;
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int len;
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session = iscsi_dev_to_session(conn->dev.parent);
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ddb_entry = session->dd_data;
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switch (param) {
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case ISCSI_PARAM_CONN_PORT:
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len = sprintf(buf, "%hu\n", ddb_entry->port);
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break;
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case ISCSI_PARAM_CONN_ADDRESS:
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/* TODO: what are the ipv6 bits */
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len = sprintf(buf, "%u.%u.%u.%u\n",
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NIPQUAD(ddb_entry->ip_addr));
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break;
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default:
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return -ENOSYS;
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}
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return len;
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}
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static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
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uint32_t enable, struct sockaddr *dst_addr)
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{
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struct scsi_qla_host *ha;
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struct Scsi_Host *shost;
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struct sockaddr_in *addr;
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struct sockaddr_in6 *addr6;
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int ret = 0;
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shost = scsi_host_lookup(host_no);
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if (IS_ERR(shost)) {
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printk(KERN_ERR "Could not find host no %u\n", host_no);
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return -ENODEV;
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}
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ha = (struct scsi_qla_host *) shost->hostdata;
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switch (type) {
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case ISCSI_TGT_DSCVR_SEND_TARGETS:
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if (dst_addr->sa_family == AF_INET) {
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addr = (struct sockaddr_in *)dst_addr;
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if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
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addr->sin_port) != QLA_SUCCESS)
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ret = -EIO;
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} else if (dst_addr->sa_family == AF_INET6) {
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/*
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* TODO: fix qla4xxx_send_tgts
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*/
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addr6 = (struct sockaddr_in6 *)dst_addr;
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if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
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addr6->sin6_port) != QLA_SUCCESS)
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ret = -EIO;
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} else
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ret = -ENOSYS;
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break;
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default:
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ret = -ENOSYS;
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}
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scsi_host_put(shost);
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return ret;
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}
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void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
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{
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if (!ddb_entry->sess)
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return;
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if (ddb_entry->conn) {
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iscsi_if_destroy_session_done(ddb_entry->conn);
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iscsi_destroy_conn(ddb_entry->conn);
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iscsi_remove_session(ddb_entry->sess);
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}
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iscsi_free_session(ddb_entry->sess);
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}
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int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
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{
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int err;
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err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
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if (err) {
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DEBUG2(printk(KERN_ERR "Could not add session.\n"));
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return err;
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}
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ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
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if (!ddb_entry->conn) {
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iscsi_remove_session(ddb_entry->sess);
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DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
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return -ENOMEM;
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}
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ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
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iscsi_if_create_session_done(ddb_entry->conn);
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return 0;
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}
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struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
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{
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struct ddb_entry *ddb_entry;
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struct iscsi_cls_session *sess;
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sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
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if (!sess)
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return NULL;
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ddb_entry = sess->dd_data;
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memset(ddb_entry, 0, sizeof(*ddb_entry));
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ddb_entry->ha = ha;
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ddb_entry->sess = sess;
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return ddb_entry;
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}
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/*
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* Timer routines
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*/
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static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
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unsigned long interval)
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{
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DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
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__func__, ha->host->host_no));
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init_timer(&ha->timer);
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ha->timer.expires = jiffies + interval * HZ;
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ha->timer.data = (unsigned long)ha;
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ha->timer.function = (void (*)(unsigned long))func;
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add_timer(&ha->timer);
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ha->timer_active = 1;
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}
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static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
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{
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del_timer_sync(&ha->timer);
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ha->timer_active = 0;
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}
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/***
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* qla4xxx_mark_device_missing - mark a device as missing.
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* @ha: Pointer to host adapter structure.
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* @ddb_entry: Pointer to device database entry
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*
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* This routine marks a device missing and resets the relogin retry count.
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**/
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void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
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struct ddb_entry *ddb_entry)
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{
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atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
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DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
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ha->host_no, ddb_entry->bus, ddb_entry->target,
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ddb_entry->fw_ddb_index));
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iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
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}
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static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
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struct ddb_entry *ddb_entry,
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struct scsi_cmnd *cmd,
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void (*done)(struct scsi_cmnd *))
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{
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struct srb *srb;
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srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
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if (!srb)
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return srb;
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atomic_set(&srb->ref_count, 1);
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srb->ha = ha;
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srb->ddb = ddb_entry;
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srb->cmd = cmd;
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srb->flags = 0;
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cmd->SCp.ptr = (void *)srb;
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cmd->scsi_done = done;
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return srb;
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}
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static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
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{
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struct scsi_cmnd *cmd = srb->cmd;
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if (srb->flags & SRB_DMA_VALID) {
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if (cmd->use_sg) {
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pci_unmap_sg(ha->pdev, cmd->request_buffer,
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cmd->use_sg, cmd->sc_data_direction);
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} else if (cmd->request_bufflen) {
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pci_unmap_single(ha->pdev, srb->dma_handle,
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cmd->request_bufflen,
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cmd->sc_data_direction);
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}
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srb->flags &= ~SRB_DMA_VALID;
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}
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cmd->SCp.ptr = NULL;
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}
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void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
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{
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struct scsi_cmnd *cmd = srb->cmd;
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qla4xxx_srb_free_dma(ha, srb);
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mempool_free(srb, ha->srb_mempool);
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cmd->scsi_done(cmd);
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}
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/**
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* qla4xxx_queuecommand - scsi layer issues scsi command to driver.
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* @cmd: Pointer to Linux's SCSI command structure
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* @done_fn: Function that the driver calls to notify the SCSI mid-layer
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* that the command has been processed.
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*
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* Remarks:
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* This routine is invoked by Linux to send a SCSI command to the driver.
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* The mid-level driver tries to ensure that queuecommand never gets
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* invoked concurrently with itself or the interrupt handler (although
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* the interrupt handler may call this routine as part of request-
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* completion handling). Unfortunely, it sometimes calls the scheduler
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* in interrupt context which is a big NO! NO!.
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**/
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static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
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void (*done)(struct scsi_cmnd *))
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{
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struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
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struct ddb_entry *ddb_entry = cmd->device->hostdata;
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struct srb *srb;
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int rval;
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if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
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if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
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cmd->result = DID_NO_CONNECT << 16;
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goto qc_fail_command;
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}
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goto qc_host_busy;
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}
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spin_unlock_irq(ha->host->host_lock);
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srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
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if (!srb)
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goto qc_host_busy_lock;
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rval = qla4xxx_send_command_to_isp(ha, srb);
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if (rval != QLA_SUCCESS)
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goto qc_host_busy_free_sp;
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spin_lock_irq(ha->host->host_lock);
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return 0;
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qc_host_busy_free_sp:
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qla4xxx_srb_free_dma(ha, srb);
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mempool_free(srb, ha->srb_mempool);
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|
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qc_host_busy_lock:
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spin_lock_irq(ha->host->host_lock);
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qc_host_busy:
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return SCSI_MLQUEUE_HOST_BUSY;
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qc_fail_command:
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done(cmd);
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|
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return 0;
|
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}
|
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|
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/**
|
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* qla4xxx_mem_free - frees memory allocated to adapter
|
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* @ha: Pointer to host adapter structure.
|
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*
|
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* Frees memory previously allocated by qla4xxx_mem_alloc
|
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**/
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static void qla4xxx_mem_free(struct scsi_qla_host *ha)
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{
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if (ha->queues)
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dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
|
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ha->queues_dma);
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|
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ha->queues_len = 0;
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ha->queues = NULL;
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ha->queues_dma = 0;
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ha->request_ring = NULL;
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ha->request_dma = 0;
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ha->response_ring = NULL;
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ha->response_dma = 0;
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ha->shadow_regs = NULL;
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ha->shadow_regs_dma = 0;
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|
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/* Free srb pool. */
|
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if (ha->srb_mempool)
|
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mempool_destroy(ha->srb_mempool);
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|
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ha->srb_mempool = NULL;
|
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|
|
/* release io space registers */
|
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if (ha->reg)
|
|
iounmap(ha->reg);
|
|
pci_release_regions(ha->pdev);
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_mem_alloc - allocates memory for use by adapter.
|
|
* @ha: Pointer to host adapter structure
|
|
*
|
|
* Allocates DMA memory for request and response queues. Also allocates memory
|
|
* for srbs.
|
|
**/
|
|
static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
|
|
{
|
|
unsigned long align;
|
|
|
|
/* Allocate contiguous block of DMA memory for queues. */
|
|
ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
|
|
(RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
|
|
sizeof(struct shadow_regs) +
|
|
MEM_ALIGN_VALUE +
|
|
(PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
|
|
ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
|
|
&ha->queues_dma, GFP_KERNEL);
|
|
if (ha->queues == NULL) {
|
|
dev_warn(&ha->pdev->dev,
|
|
"Memory Allocation failed - queues.\n");
|
|
|
|
goto mem_alloc_error_exit;
|
|
}
|
|
memset(ha->queues, 0, ha->queues_len);
|
|
|
|
/*
|
|
* As per RISC alignment requirements -- the bus-address must be a
|
|
* multiple of the request-ring size (in bytes).
|
|
*/
|
|
align = 0;
|
|
if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
|
|
align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
|
|
(MEM_ALIGN_VALUE - 1));
|
|
|
|
/* Update request and response queue pointers. */
|
|
ha->request_dma = ha->queues_dma + align;
|
|
ha->request_ring = (struct queue_entry *) (ha->queues + align);
|
|
ha->response_dma = ha->queues_dma + align +
|
|
(REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
|
|
ha->response_ring = (struct queue_entry *) (ha->queues + align +
|
|
(REQUEST_QUEUE_DEPTH *
|
|
QUEUE_SIZE));
|
|
ha->shadow_regs_dma = ha->queues_dma + align +
|
|
(REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
|
|
(RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
|
|
ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
|
|
(REQUEST_QUEUE_DEPTH *
|
|
QUEUE_SIZE) +
|
|
(RESPONSE_QUEUE_DEPTH *
|
|
QUEUE_SIZE));
|
|
|
|
/* Allocate memory for srb pool. */
|
|
ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
|
|
mempool_free_slab, srb_cachep);
|
|
if (ha->srb_mempool == NULL) {
|
|
dev_warn(&ha->pdev->dev,
|
|
"Memory Allocation failed - SRB Pool.\n");
|
|
|
|
goto mem_alloc_error_exit;
|
|
}
|
|
|
|
return QLA_SUCCESS;
|
|
|
|
mem_alloc_error_exit:
|
|
qla4xxx_mem_free(ha);
|
|
return QLA_ERROR;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_timer - checks every second for work to do.
|
|
* @ha: Pointer to host adapter structure.
|
|
**/
|
|
static void qla4xxx_timer(struct scsi_qla_host *ha)
|
|
{
|
|
struct ddb_entry *ddb_entry, *dtemp;
|
|
int start_dpc = 0;
|
|
|
|
/* Search for relogin's to time-out and port down retry. */
|
|
list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
|
|
/* Count down time between sending relogins */
|
|
if (adapter_up(ha) &&
|
|
!test_bit(DF_RELOGIN, &ddb_entry->flags) &&
|
|
atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
|
|
if (atomic_read(&ddb_entry->retry_relogin_timer) !=
|
|
INVALID_ENTRY) {
|
|
if (atomic_read(&ddb_entry->retry_relogin_timer)
|
|
== 0) {
|
|
atomic_set(&ddb_entry->
|
|
retry_relogin_timer,
|
|
INVALID_ENTRY);
|
|
set_bit(DPC_RELOGIN_DEVICE,
|
|
&ha->dpc_flags);
|
|
set_bit(DF_RELOGIN, &ddb_entry->flags);
|
|
DEBUG2(printk("scsi%ld: %s: index [%d]"
|
|
" login device\n",
|
|
ha->host_no, __func__,
|
|
ddb_entry->fw_ddb_index));
|
|
} else
|
|
atomic_dec(&ddb_entry->
|
|
retry_relogin_timer);
|
|
}
|
|
}
|
|
|
|
/* Wait for relogin to timeout */
|
|
if (atomic_read(&ddb_entry->relogin_timer) &&
|
|
(atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
|
|
/*
|
|
* If the relogin times out and the device is
|
|
* still NOT ONLINE then try and relogin again.
|
|
*/
|
|
if (atomic_read(&ddb_entry->state) !=
|
|
DDB_STATE_ONLINE &&
|
|
ddb_entry->fw_ddb_device_state ==
|
|
DDB_DS_SESSION_FAILED) {
|
|
/* Reset retry relogin timer */
|
|
atomic_inc(&ddb_entry->relogin_retry_count);
|
|
DEBUG2(printk("scsi%ld: index[%d] relogin"
|
|
" timed out-retrying"
|
|
" relogin (%d)\n",
|
|
ha->host_no,
|
|
ddb_entry->fw_ddb_index,
|
|
atomic_read(&ddb_entry->
|
|
relogin_retry_count))
|
|
);
|
|
start_dpc++;
|
|
DEBUG(printk("scsi%ld:%d:%d: index [%d] "
|
|
"initate relogin after"
|
|
" %d seconds\n",
|
|
ha->host_no, ddb_entry->bus,
|
|
ddb_entry->target,
|
|
ddb_entry->fw_ddb_index,
|
|
ddb_entry->default_time2wait + 4)
|
|
);
|
|
|
|
atomic_set(&ddb_entry->retry_relogin_timer,
|
|
ddb_entry->default_time2wait + 4);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check for heartbeat interval. */
|
|
if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
|
|
ha->heartbeat_interval != 0) {
|
|
ha->seconds_since_last_heartbeat++;
|
|
if (ha->seconds_since_last_heartbeat >
|
|
ha->heartbeat_interval + 2)
|
|
set_bit(DPC_RESET_HA, &ha->dpc_flags);
|
|
}
|
|
|
|
|
|
/* Wakeup the dpc routine for this adapter, if needed. */
|
|
if ((start_dpc ||
|
|
test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
|
|
test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
|
|
test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
|
|
test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
|
|
test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
|
|
test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
|
|
test_bit(DPC_AEN, &ha->dpc_flags)) &&
|
|
ha->dpc_thread) {
|
|
DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
|
|
" - dpc flags = 0x%lx\n",
|
|
ha->host_no, __func__, ha->dpc_flags));
|
|
queue_work(ha->dpc_thread, &ha->dpc_work);
|
|
}
|
|
|
|
/* Reschedule timer thread to call us back in one second */
|
|
mod_timer(&ha->timer, jiffies + HZ);
|
|
|
|
DEBUG2(ha->seconds_since_last_intr++);
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_cmd_wait - waits for all outstanding commands to complete
|
|
* @ha: Pointer to host adapter structure.
|
|
*
|
|
* This routine stalls the driver until all outstanding commands are returned.
|
|
* Caller must release the Hardware Lock prior to calling this routine.
|
|
**/
|
|
static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
|
|
{
|
|
uint32_t index = 0;
|
|
int stat = QLA_SUCCESS;
|
|
unsigned long flags;
|
|
struct scsi_cmnd *cmd;
|
|
int wait_cnt = WAIT_CMD_TOV; /*
|
|
* Initialized for 30 seconds as we
|
|
* expect all commands to retuned
|
|
* ASAP.
|
|
*/
|
|
|
|
while (wait_cnt) {
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
/* Find a command that hasn't completed. */
|
|
for (index = 0; index < ha->host->can_queue; index++) {
|
|
cmd = scsi_host_find_tag(ha->host, index);
|
|
if (cmd != NULL)
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
/* If No Commands are pending, wait is complete */
|
|
if (index == ha->host->can_queue) {
|
|
break;
|
|
}
|
|
|
|
/* If we timed out on waiting for commands to come back
|
|
* return ERROR.
|
|
*/
|
|
wait_cnt--;
|
|
if (wait_cnt == 0)
|
|
stat = QLA_ERROR;
|
|
else {
|
|
msleep(1000);
|
|
}
|
|
} /* End of While (wait_cnt) */
|
|
|
|
return stat;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_soft_reset - performs soft reset.
|
|
* @ha: Pointer to host adapter structure.
|
|
**/
|
|
int qla4xxx_soft_reset(struct scsi_qla_host *ha)
|
|
{
|
|
uint32_t max_wait_time;
|
|
unsigned long flags = 0;
|
|
int status = QLA_ERROR;
|
|
uint32_t ctrl_status;
|
|
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
|
|
/*
|
|
* If the SCSI Reset Interrupt bit is set, clear it.
|
|
* Otherwise, the Soft Reset won't work.
|
|
*/
|
|
ctrl_status = readw(&ha->reg->ctrl_status);
|
|
if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
|
|
writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
|
|
|
|
/* Issue Soft Reset */
|
|
writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
|
|
readl(&ha->reg->ctrl_status);
|
|
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
/* Wait until the Network Reset Intr bit is cleared */
|
|
max_wait_time = RESET_INTR_TOV;
|
|
do {
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
ctrl_status = readw(&ha->reg->ctrl_status);
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
|
|
break;
|
|
|
|
msleep(1000);
|
|
} while ((--max_wait_time));
|
|
|
|
if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
|
|
DEBUG2(printk(KERN_WARNING
|
|
"scsi%ld: Network Reset Intr not cleared by "
|
|
"Network function, clearing it now!\n",
|
|
ha->host_no));
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
|
|
readl(&ha->reg->ctrl_status);
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
}
|
|
|
|
/* Wait until the firmware tells us the Soft Reset is done */
|
|
max_wait_time = SOFT_RESET_TOV;
|
|
do {
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
ctrl_status = readw(&ha->reg->ctrl_status);
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
if ((ctrl_status & CSR_SOFT_RESET) == 0) {
|
|
status = QLA_SUCCESS;
|
|
break;
|
|
}
|
|
|
|
msleep(1000);
|
|
} while ((--max_wait_time));
|
|
|
|
/*
|
|
* Also, make sure that the SCSI Reset Interrupt bit has been cleared
|
|
* after the soft reset has taken place.
|
|
*/
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
ctrl_status = readw(&ha->reg->ctrl_status);
|
|
if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
|
|
writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
|
|
readl(&ha->reg->ctrl_status);
|
|
}
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
/* If soft reset fails then most probably the bios on other
|
|
* function is also enabled.
|
|
* Since the initialization is sequential the other fn
|
|
* wont be able to acknowledge the soft reset.
|
|
* Issue a force soft reset to workaround this scenario.
|
|
*/
|
|
if (max_wait_time == 0) {
|
|
/* Issue Force Soft Reset */
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
|
|
readl(&ha->reg->ctrl_status);
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
/* Wait until the firmware tells us the Soft Reset is done */
|
|
max_wait_time = SOFT_RESET_TOV;
|
|
do {
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
ctrl_status = readw(&ha->reg->ctrl_status);
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
|
|
status = QLA_SUCCESS;
|
|
break;
|
|
}
|
|
|
|
msleep(1000);
|
|
} while ((--max_wait_time));
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
|
|
* @ha: Pointer to host adapter structure.
|
|
*
|
|
* This routine is called just prior to a HARD RESET to return all
|
|
* outstanding commands back to the Operating System.
|
|
* Caller should make sure that the following locks are released
|
|
* before this calling routine: Hardware lock, and io_request_lock.
|
|
**/
|
|
static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
|
|
{
|
|
struct srb *srb;
|
|
int i;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
for (i = 0; i < ha->host->can_queue; i++) {
|
|
srb = qla4xxx_del_from_active_array(ha, i);
|
|
if (srb != NULL) {
|
|
srb->cmd->result = DID_RESET << 16;
|
|
qla4xxx_srb_compl(ha, srb);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_recover_adapter - recovers adapter after a fatal error
|
|
* @ha: Pointer to host adapter structure.
|
|
* @renew_ddb_list: Indicates what to do with the adapter's ddb list
|
|
* after adapter recovery has completed.
|
|
* 0=preserve ddb list, 1=destroy and rebuild ddb list
|
|
**/
|
|
static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
|
|
uint8_t renew_ddb_list)
|
|
{
|
|
int status;
|
|
|
|
/* Stall incoming I/O until we are done */
|
|
clear_bit(AF_ONLINE, &ha->flags);
|
|
DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
|
|
__func__));
|
|
|
|
/* Wait for outstanding commands to complete.
|
|
* Stalls the driver for max 30 secs
|
|
*/
|
|
status = qla4xxx_cmd_wait(ha);
|
|
|
|
qla4xxx_disable_intrs(ha);
|
|
|
|
/* Flush any pending ddb changed AENs */
|
|
qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
|
|
|
|
/* Reset the firmware. If successful, function
|
|
* returns with ISP interrupts enabled.
|
|
*/
|
|
if (status == QLA_SUCCESS) {
|
|
DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
|
|
ha->host_no, __func__));
|
|
qla4xxx_flush_active_srbs(ha);
|
|
if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
|
|
status = qla4xxx_soft_reset(ha);
|
|
else
|
|
status = QLA_ERROR;
|
|
}
|
|
|
|
/* Flush any pending ddb changed AENs */
|
|
qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
|
|
|
|
/* Re-initialize firmware. If successful, function returns
|
|
* with ISP interrupts enabled */
|
|
if (status == QLA_SUCCESS) {
|
|
DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
|
|
ha->host_no, __func__));
|
|
|
|
/* If successful, AF_ONLINE flag set in
|
|
* qla4xxx_initialize_adapter */
|
|
status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
|
|
}
|
|
|
|
/* Failed adapter initialization?
|
|
* Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
|
|
if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
|
|
(test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
|
|
/* Adapter initialization failed, see if we can retry
|
|
* resetting the ha */
|
|
if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
|
|
ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
|
|
DEBUG2(printk("scsi%ld: recover adapter - retrying "
|
|
"(%d) more times\n", ha->host_no,
|
|
ha->retry_reset_ha_cnt));
|
|
set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
|
|
status = QLA_ERROR;
|
|
} else {
|
|
if (ha->retry_reset_ha_cnt > 0) {
|
|
/* Schedule another Reset HA--DPC will retry */
|
|
ha->retry_reset_ha_cnt--;
|
|
DEBUG2(printk("scsi%ld: recover adapter - "
|
|
"retry remaining %d\n",
|
|
ha->host_no,
|
|
ha->retry_reset_ha_cnt));
|
|
status = QLA_ERROR;
|
|
}
|
|
|
|
if (ha->retry_reset_ha_cnt == 0) {
|
|
/* Recover adapter retries have been exhausted.
|
|
* Adapter DEAD */
|
|
DEBUG2(printk("scsi%ld: recover adapter "
|
|
"failed - board disabled\n",
|
|
ha->host_no));
|
|
qla4xxx_flush_active_srbs(ha);
|
|
clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
|
|
clear_bit(DPC_RESET_HA, &ha->dpc_flags);
|
|
clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
|
|
&ha->dpc_flags);
|
|
status = QLA_ERROR;
|
|
}
|
|
}
|
|
} else {
|
|
clear_bit(DPC_RESET_HA, &ha->dpc_flags);
|
|
clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
|
|
clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
|
|
}
|
|
|
|
ha->adapter_error_count++;
|
|
|
|
if (status == QLA_SUCCESS)
|
|
qla4xxx_enable_intrs(ha);
|
|
|
|
DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_do_dpc - dpc routine
|
|
* @data: in our case pointer to adapter structure
|
|
*
|
|
* This routine is a task that is schedule by the interrupt handler
|
|
* to perform the background processing for interrupts. We put it
|
|
* on a task queue that is consumed whenever the scheduler runs; that's
|
|
* so you can do anything (i.e. put the process to sleep etc). In fact,
|
|
* the mid-level tries to sleep when it reaches the driver threshold
|
|
* "host->can_queue". This can cause a panic if we were in our interrupt code.
|
|
**/
|
|
static void qla4xxx_do_dpc(void *data)
|
|
{
|
|
struct scsi_qla_host *ha = (struct scsi_qla_host *) data;
|
|
struct ddb_entry *ddb_entry, *dtemp;
|
|
|
|
DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
|
|
"flags = 0x%08lx, dpc_flags = 0x%08lx\n",
|
|
ha->host_no, __func__, ha->flags, ha->dpc_flags));
|
|
|
|
/* Initialization not yet finished. Don't do anything yet. */
|
|
if (!test_bit(AF_INIT_DONE, &ha->flags))
|
|
return;
|
|
|
|
if (adapter_up(ha) ||
|
|
test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
|
|
test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
|
|
test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
|
|
if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
|
|
test_bit(DPC_RESET_HA, &ha->dpc_flags))
|
|
qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
|
|
|
|
if (test_and_clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
|
|
uint8_t wait_time = RESET_INTR_TOV;
|
|
unsigned long flags = 0;
|
|
|
|
qla4xxx_flush_active_srbs(ha);
|
|
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
while ((readw(&ha->reg->ctrl_status) &
|
|
(CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
|
|
if (--wait_time == 0)
|
|
break;
|
|
|
|
spin_unlock_irqrestore(&ha->hardware_lock,
|
|
flags);
|
|
|
|
msleep(1000);
|
|
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
}
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
if (wait_time == 0)
|
|
DEBUG2(printk("scsi%ld: %s: SR|FSR "
|
|
"bit not cleared-- resetting\n",
|
|
ha->host_no, __func__));
|
|
}
|
|
}
|
|
|
|
/* ---- process AEN? --- */
|
|
if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
|
|
qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
|
|
|
|
/* ---- Get DHCP IP Address? --- */
|
|
if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
|
|
qla4xxx_get_dhcp_ip_address(ha);
|
|
|
|
/* ---- relogin device? --- */
|
|
if (adapter_up(ha) &&
|
|
test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
|
|
list_for_each_entry_safe(ddb_entry, dtemp,
|
|
&ha->ddb_list, list) {
|
|
if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
|
|
atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
|
|
qla4xxx_relogin_device(ha, ddb_entry);
|
|
|
|
/*
|
|
* If mbx cmd times out there is no point
|
|
* in continuing further.
|
|
* With large no of targets this can hang
|
|
* the system.
|
|
*/
|
|
if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
|
|
printk(KERN_WARNING "scsi%ld: %s: "
|
|
"need to reset hba\n",
|
|
ha->host_no, __func__);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_free_adapter - release the adapter
|
|
* @ha: pointer to adapter structure
|
|
**/
|
|
static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
|
|
{
|
|
|
|
if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
|
|
/* Turn-off interrupts on the card. */
|
|
qla4xxx_disable_intrs(ha);
|
|
}
|
|
|
|
/* Kill the kernel thread for this host */
|
|
if (ha->dpc_thread)
|
|
destroy_workqueue(ha->dpc_thread);
|
|
|
|
/* Issue Soft Reset to put firmware in unknown state */
|
|
if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
|
|
qla4xxx_soft_reset(ha);
|
|
|
|
/* Remove timer thread, if present */
|
|
if (ha->timer_active)
|
|
qla4xxx_stop_timer(ha);
|
|
|
|
/* free extra memory */
|
|
qla4xxx_mem_free(ha);
|
|
|
|
/* Detach interrupts */
|
|
if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
|
|
free_irq(ha->pdev->irq, ha);
|
|
|
|
pci_disable_device(ha->pdev);
|
|
|
|
}
|
|
|
|
/***
|
|
* qla4xxx_iospace_config - maps registers
|
|
* @ha: pointer to adapter structure
|
|
*
|
|
* This routines maps HBA's registers from the pci address space
|
|
* into the kernel virtual address space for memory mapped i/o.
|
|
**/
|
|
static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
|
|
{
|
|
unsigned long pio, pio_len, pio_flags;
|
|
unsigned long mmio, mmio_len, mmio_flags;
|
|
|
|
pio = pci_resource_start(ha->pdev, 0);
|
|
pio_len = pci_resource_len(ha->pdev, 0);
|
|
pio_flags = pci_resource_flags(ha->pdev, 0);
|
|
if (pio_flags & IORESOURCE_IO) {
|
|
if (pio_len < MIN_IOBASE_LEN) {
|
|
dev_warn(&ha->pdev->dev,
|
|
"Invalid PCI I/O region size\n");
|
|
pio = 0;
|
|
}
|
|
} else {
|
|
dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
|
|
pio = 0;
|
|
}
|
|
|
|
/* Use MMIO operations for all accesses. */
|
|
mmio = pci_resource_start(ha->pdev, 1);
|
|
mmio_len = pci_resource_len(ha->pdev, 1);
|
|
mmio_flags = pci_resource_flags(ha->pdev, 1);
|
|
|
|
if (!(mmio_flags & IORESOURCE_MEM)) {
|
|
dev_err(&ha->pdev->dev,
|
|
"region #0 not an MMIO resource, aborting\n");
|
|
|
|
goto iospace_error_exit;
|
|
}
|
|
if (mmio_len < MIN_IOBASE_LEN) {
|
|
dev_err(&ha->pdev->dev,
|
|
"Invalid PCI mem region size, aborting\n");
|
|
goto iospace_error_exit;
|
|
}
|
|
|
|
if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
|
|
dev_warn(&ha->pdev->dev,
|
|
"Failed to reserve PIO/MMIO regions\n");
|
|
|
|
goto iospace_error_exit;
|
|
}
|
|
|
|
ha->pio_address = pio;
|
|
ha->pio_length = pio_len;
|
|
ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
|
|
if (!ha->reg) {
|
|
dev_err(&ha->pdev->dev,
|
|
"cannot remap MMIO, aborting\n");
|
|
|
|
goto iospace_error_exit;
|
|
}
|
|
|
|
return 0;
|
|
|
|
iospace_error_exit:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_probe_adapter - callback function to probe HBA
|
|
* @pdev: pointer to pci_dev structure
|
|
* @pci_device_id: pointer to pci_device entry
|
|
*
|
|
* This routine will probe for Qlogic 4xxx iSCSI host adapters.
|
|
* It returns zero if successful. It also initializes all data necessary for
|
|
* the driver.
|
|
**/
|
|
static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
int ret = -ENODEV, status;
|
|
struct Scsi_Host *host;
|
|
struct scsi_qla_host *ha;
|
|
struct ddb_entry *ddb_entry, *ddbtemp;
|
|
uint8_t init_retry_count = 0;
|
|
char buf[34];
|
|
|
|
if (pci_enable_device(pdev))
|
|
return -1;
|
|
|
|
host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
|
|
if (host == NULL) {
|
|
printk(KERN_WARNING
|
|
"qla4xxx: Couldn't allocate host from scsi layer!\n");
|
|
goto probe_disable_device;
|
|
}
|
|
|
|
/* Clear our data area */
|
|
ha = (struct scsi_qla_host *) host->hostdata;
|
|
memset(ha, 0, sizeof(*ha));
|
|
|
|
/* Save the information from PCI BIOS. */
|
|
ha->pdev = pdev;
|
|
ha->host = host;
|
|
ha->host_no = host->host_no;
|
|
|
|
/* Configure PCI I/O space. */
|
|
ret = qla4xxx_iospace_config(ha);
|
|
if (ret)
|
|
goto probe_failed;
|
|
|
|
dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
|
|
pdev->device, pdev->irq, ha->reg);
|
|
|
|
qla4xxx_config_dma_addressing(ha);
|
|
|
|
/* Initialize lists and spinlocks. */
|
|
INIT_LIST_HEAD(&ha->ddb_list);
|
|
INIT_LIST_HEAD(&ha->free_srb_q);
|
|
|
|
mutex_init(&ha->mbox_sem);
|
|
init_waitqueue_head(&ha->mailbox_wait_queue);
|
|
|
|
spin_lock_init(&ha->hardware_lock);
|
|
|
|
/* Allocate dma buffers */
|
|
if (qla4xxx_mem_alloc(ha)) {
|
|
dev_warn(&ha->pdev->dev,
|
|
"[ERROR] Failed to allocate memory for adapter\n");
|
|
|
|
ret = -ENOMEM;
|
|
goto probe_failed;
|
|
}
|
|
|
|
/*
|
|
* Initialize the Host adapter request/response queues and
|
|
* firmware
|
|
* NOTE: interrupts enabled upon successful completion
|
|
*/
|
|
status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
|
|
while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
|
|
DEBUG2(printk("scsi: %s: retrying adapter initialization "
|
|
"(%d)\n", __func__, init_retry_count));
|
|
qla4xxx_soft_reset(ha);
|
|
status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
|
|
}
|
|
if (status == QLA_ERROR) {
|
|
dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
|
|
|
|
ret = -ENODEV;
|
|
goto probe_failed;
|
|
}
|
|
|
|
host->cmd_per_lun = 3;
|
|
host->max_channel = 0;
|
|
host->max_lun = MAX_LUNS - 1;
|
|
host->max_id = MAX_TARGETS;
|
|
host->max_cmd_len = IOCB_MAX_CDB_LEN;
|
|
host->can_queue = MAX_SRBS ;
|
|
host->transportt = qla4xxx_scsi_transport;
|
|
|
|
ret = scsi_init_shared_tag_map(host, MAX_SRBS);
|
|
if (ret) {
|
|
dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed");
|
|
goto probe_failed;
|
|
}
|
|
|
|
/* Startup the kernel thread for this host adapter. */
|
|
DEBUG2(printk("scsi: %s: Starting kernel thread for "
|
|
"qla4xxx_dpc\n", __func__));
|
|
sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
|
|
ha->dpc_thread = create_singlethread_workqueue(buf);
|
|
if (!ha->dpc_thread) {
|
|
dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
|
|
ret = -ENODEV;
|
|
goto probe_failed;
|
|
}
|
|
INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc, ha);
|
|
|
|
ret = request_irq(pdev->irq, qla4xxx_intr_handler,
|
|
SA_INTERRUPT|SA_SHIRQ, "qla4xxx", ha);
|
|
if (ret) {
|
|
dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
|
|
" already in use.\n", pdev->irq);
|
|
goto probe_failed;
|
|
}
|
|
set_bit(AF_IRQ_ATTACHED, &ha->flags);
|
|
host->irq = pdev->irq;
|
|
DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
|
|
|
|
qla4xxx_enable_intrs(ha);
|
|
|
|
/* Start timer thread. */
|
|
qla4xxx_start_timer(ha, qla4xxx_timer, 1);
|
|
|
|
set_bit(AF_INIT_DONE, &ha->flags);
|
|
|
|
pci_set_drvdata(pdev, ha);
|
|
|
|
ret = scsi_add_host(host, &pdev->dev);
|
|
if (ret)
|
|
goto probe_failed;
|
|
|
|
/* Update transport device information for all devices. */
|
|
list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
|
|
if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
|
|
if (qla4xxx_add_sess(ddb_entry))
|
|
goto remove_host;
|
|
}
|
|
|
|
printk(KERN_INFO
|
|
" QLogic iSCSI HBA Driver version: %s\n"
|
|
" QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
|
|
qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
|
|
ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
|
|
ha->patch_number, ha->build_number);
|
|
|
|
return 0;
|
|
|
|
remove_host:
|
|
qla4xxx_free_ddb_list(ha);
|
|
scsi_remove_host(host);
|
|
|
|
probe_failed:
|
|
qla4xxx_free_adapter(ha);
|
|
scsi_host_put(ha->host);
|
|
|
|
probe_disable_device:
|
|
pci_disable_device(pdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_remove_adapter - calback function to remove adapter.
|
|
* @pci_dev: PCI device pointer
|
|
**/
|
|
static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
|
|
{
|
|
struct scsi_qla_host *ha;
|
|
|
|
ha = pci_get_drvdata(pdev);
|
|
|
|
/* remove devs from iscsi_sessions to scsi_devices */
|
|
qla4xxx_free_ddb_list(ha);
|
|
|
|
scsi_remove_host(ha->host);
|
|
|
|
qla4xxx_free_adapter(ha);
|
|
|
|
scsi_host_put(ha->host);
|
|
|
|
pci_set_drvdata(pdev, NULL);
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
|
|
* @ha: HA context
|
|
*
|
|
* At exit, the @ha's flags.enable_64bit_addressing set to indicated
|
|
* supported addressing method.
|
|
*/
|
|
void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
|
|
{
|
|
int retval;
|
|
|
|
/* Update our PCI device dma_mask for full 64 bit mask */
|
|
if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
|
|
if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
|
|
dev_dbg(&ha->pdev->dev,
|
|
"Failed to set 64 bit PCI consistent mask; "
|
|
"using 32 bit.\n");
|
|
retval = pci_set_consistent_dma_mask(ha->pdev,
|
|
DMA_32BIT_MASK);
|
|
}
|
|
} else
|
|
retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
|
|
}
|
|
|
|
static int qla4xxx_slave_alloc(struct scsi_device *sdev)
|
|
{
|
|
struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
|
|
struct ddb_entry *ddb = sess->dd_data;
|
|
|
|
sdev->hostdata = ddb;
|
|
sdev->tagged_supported = 1;
|
|
scsi_activate_tcq(sdev, sdev->host->can_queue);
|
|
return 0;
|
|
}
|
|
|
|
static int qla4xxx_slave_configure(struct scsi_device *sdev)
|
|
{
|
|
sdev->tagged_supported = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void qla4xxx_slave_destroy(struct scsi_device *sdev)
|
|
{
|
|
scsi_deactivate_tcq(sdev, 1);
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_del_from_active_array - returns an active srb
|
|
* @ha: Pointer to host adapter structure.
|
|
* @index: index into to the active_array
|
|
*
|
|
* This routine removes and returns the srb at the specified index
|
|
**/
|
|
struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
|
|
{
|
|
struct srb *srb = NULL;
|
|
struct scsi_cmnd *cmd;
|
|
|
|
if (!(cmd = scsi_host_find_tag(ha->host, index)))
|
|
return srb;
|
|
|
|
if (!(srb = (struct srb *)cmd->host_scribble))
|
|
return srb;
|
|
|
|
/* update counters */
|
|
if (srb->flags & SRB_DMA_VALID) {
|
|
ha->req_q_count += srb->iocb_cnt;
|
|
ha->iocb_cnt -= srb->iocb_cnt;
|
|
if (srb->cmd)
|
|
srb->cmd->host_scribble = NULL;
|
|
}
|
|
return srb;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
|
|
* @ha: actual ha whose done queue will contain the comd returned by firmware.
|
|
* @cmd: Scsi Command to wait on.
|
|
*
|
|
* This routine waits for the command to be returned by the Firmware
|
|
* for some max time.
|
|
**/
|
|
static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
|
|
struct scsi_cmnd *cmd)
|
|
{
|
|
int done = 0;
|
|
struct srb *rp;
|
|
uint32_t max_wait_time = EH_WAIT_CMD_TOV;
|
|
|
|
do {
|
|
/* Checking to see if its returned to OS */
|
|
rp = (struct srb *) cmd->SCp.ptr;
|
|
if (rp == NULL) {
|
|
done++;
|
|
break;
|
|
}
|
|
|
|
msleep(2000);
|
|
} while (max_wait_time--);
|
|
|
|
return done;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_wait_for_hba_online - waits for HBA to come online
|
|
* @ha: Pointer to host adapter structure
|
|
**/
|
|
static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
|
|
{
|
|
unsigned long wait_online;
|
|
|
|
wait_online = jiffies + (30 * HZ);
|
|
while (time_before(jiffies, wait_online)) {
|
|
|
|
if (adapter_up(ha))
|
|
return QLA_SUCCESS;
|
|
else if (ha->retry_reset_ha_cnt == 0)
|
|
return QLA_ERROR;
|
|
|
|
msleep(2000);
|
|
}
|
|
|
|
return QLA_ERROR;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
|
|
* @ha: pointer to to HBA
|
|
* @t: target id
|
|
* @l: lun id
|
|
*
|
|
* This function waits for all outstanding commands to a lun to complete. It
|
|
* returns 0 if all pending commands are returned and 1 otherwise.
|
|
**/
|
|
static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
|
|
int t, int l)
|
|
{
|
|
int cnt;
|
|
int status = 0;
|
|
struct scsi_cmnd *cmd;
|
|
|
|
/*
|
|
* Waiting for all commands for the designated target in the active
|
|
* array
|
|
*/
|
|
for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
|
|
cmd = scsi_host_find_tag(ha->host, cnt);
|
|
if (cmd && cmd->device->id == t && cmd->device->lun == l) {
|
|
if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
|
|
status++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_eh_device_reset - callback for target reset.
|
|
* @cmd: Pointer to Linux's SCSI command structure
|
|
*
|
|
* This routine is called by the Linux OS to reset all luns on the
|
|
* specified target.
|
|
**/
|
|
static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
|
|
{
|
|
struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
|
|
struct ddb_entry *ddb_entry = cmd->device->hostdata;
|
|
struct srb *sp;
|
|
int ret = FAILED, stat;
|
|
|
|
sp = (struct srb *) cmd->SCp.ptr;
|
|
if (!sp || !ddb_entry)
|
|
return ret;
|
|
|
|
dev_info(&ha->pdev->dev,
|
|
"scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
|
|
cmd->device->channel, cmd->device->id, cmd->device->lun);
|
|
|
|
DEBUG2(printk(KERN_INFO
|
|
"scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
|
|
"dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
|
|
cmd, jiffies, cmd->timeout_per_command / HZ,
|
|
ha->dpc_flags, cmd->result, cmd->allowed));
|
|
|
|
/* FIXME: wait for hba to go online */
|
|
stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
|
|
if (stat != QLA_SUCCESS) {
|
|
dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
|
|
goto eh_dev_reset_done;
|
|
}
|
|
|
|
/* Send marker. */
|
|
ha->marker_needed = 1;
|
|
|
|
/*
|
|
* If we are coming down the EH path, wait for all commands to complete
|
|
* for the device.
|
|
*/
|
|
if (cmd->device->host->shost_state == SHOST_RECOVERY) {
|
|
if (qla4xxx_eh_wait_for_active_target_commands(ha,
|
|
cmd->device->id,
|
|
cmd->device->lun)){
|
|
dev_info(&ha->pdev->dev,
|
|
"DEVICE RESET FAILED - waiting for "
|
|
"commands.\n");
|
|
goto eh_dev_reset_done;
|
|
}
|
|
}
|
|
|
|
dev_info(&ha->pdev->dev,
|
|
"scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
|
|
ha->host_no, cmd->device->channel, cmd->device->id,
|
|
cmd->device->lun);
|
|
|
|
ret = SUCCESS;
|
|
|
|
eh_dev_reset_done:
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qla4xxx_eh_host_reset - kernel callback
|
|
* @cmd: Pointer to Linux's SCSI command structure
|
|
*
|
|
* This routine is invoked by the Linux kernel to perform fatal error
|
|
* recovery on the specified adapter.
|
|
**/
|
|
static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
|
|
{
|
|
int return_status = FAILED;
|
|
struct scsi_qla_host *ha;
|
|
|
|
ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
|
|
|
|
dev_info(&ha->pdev->dev,
|
|
"scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
|
|
cmd->device->channel, cmd->device->id, cmd->device->lun);
|
|
|
|
if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
|
|
DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
|
|
"DEAD.\n", ha->host_no, cmd->device->channel,
|
|
__func__));
|
|
|
|
return FAILED;
|
|
}
|
|
|
|
if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
|
|
return_status = SUCCESS;
|
|
}
|
|
|
|
dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
|
|
return_status == FAILED ? "FAILED" : "SUCCEDED");
|
|
|
|
return return_status;
|
|
}
|
|
|
|
|
|
static struct pci_device_id qla4xxx_pci_tbl[] = {
|
|
{
|
|
.vendor = PCI_VENDOR_ID_QLOGIC,
|
|
.device = PCI_DEVICE_ID_QLOGIC_ISP4010,
|
|
.subvendor = PCI_ANY_ID,
|
|
.subdevice = PCI_ANY_ID,
|
|
},
|
|
{
|
|
.vendor = PCI_VENDOR_ID_QLOGIC,
|
|
.device = PCI_DEVICE_ID_QLOGIC_ISP4022,
|
|
.subvendor = PCI_ANY_ID,
|
|
.subdevice = PCI_ANY_ID,
|
|
},
|
|
{
|
|
.vendor = PCI_VENDOR_ID_QLOGIC,
|
|
.device = PCI_DEVICE_ID_QLOGIC_ISP4032,
|
|
.subvendor = PCI_ANY_ID,
|
|
.subdevice = PCI_ANY_ID,
|
|
},
|
|
{0, 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
|
|
|
|
struct pci_driver qla4xxx_pci_driver = {
|
|
.name = DRIVER_NAME,
|
|
.id_table = qla4xxx_pci_tbl,
|
|
.probe = qla4xxx_probe_adapter,
|
|
.remove = qla4xxx_remove_adapter,
|
|
};
|
|
|
|
static int __init qla4xxx_module_init(void)
|
|
{
|
|
int ret;
|
|
|
|
/* Allocate cache for SRBs. */
|
|
srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
|
|
SLAB_HWCACHE_ALIGN, NULL, NULL);
|
|
if (srb_cachep == NULL) {
|
|
printk(KERN_ERR
|
|
"%s: Unable to allocate SRB cache..."
|
|
"Failing load!\n", DRIVER_NAME);
|
|
ret = -ENOMEM;
|
|
goto no_srp_cache;
|
|
}
|
|
|
|
/* Derive version string. */
|
|
strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
|
|
if (ql4xextended_error_logging)
|
|
strcat(qla4xxx_version_str, "-debug");
|
|
|
|
qla4xxx_scsi_transport =
|
|
iscsi_register_transport(&qla4xxx_iscsi_transport);
|
|
if (!qla4xxx_scsi_transport){
|
|
ret = -ENODEV;
|
|
goto release_srb_cache;
|
|
}
|
|
|
|
ret = pci_register_driver(&qla4xxx_pci_driver);
|
|
if (ret)
|
|
goto unregister_transport;
|
|
|
|
printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
|
|
return 0;
|
|
|
|
unregister_transport:
|
|
iscsi_unregister_transport(&qla4xxx_iscsi_transport);
|
|
release_srb_cache:
|
|
kmem_cache_destroy(srb_cachep);
|
|
no_srp_cache:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit qla4xxx_module_exit(void)
|
|
{
|
|
pci_unregister_driver(&qla4xxx_pci_driver);
|
|
iscsi_unregister_transport(&qla4xxx_iscsi_transport);
|
|
kmem_cache_destroy(srb_cachep);
|
|
}
|
|
|
|
module_init(qla4xxx_module_init);
|
|
module_exit(qla4xxx_module_exit);
|
|
|
|
MODULE_AUTHOR("QLogic Corporation");
|
|
MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
|