1afaf5a2dSDavid Somayajulu /* 2afaf5a2dSDavid Somayajulu * QLogic iSCSI HBA Driver 3afaf5a2dSDavid Somayajulu * Copyright (c) 2003-2006 QLogic Corporation 4afaf5a2dSDavid Somayajulu * 5afaf5a2dSDavid Somayajulu * See LICENSE.qla4xxx for copyright and licensing details. 6afaf5a2dSDavid Somayajulu */ 7afaf5a2dSDavid Somayajulu #include <linux/moduleparam.h> 8afaf5a2dSDavid Somayajulu 9afaf5a2dSDavid Somayajulu #include <scsi/scsi_tcq.h> 10afaf5a2dSDavid Somayajulu #include <scsi/scsicam.h> 11afaf5a2dSDavid Somayajulu 12afaf5a2dSDavid Somayajulu #include "ql4_def.h" 13bee4fe8eSDavid C Somayajulu #include "ql4_version.h" 14bee4fe8eSDavid C Somayajulu #include "ql4_glbl.h" 15bee4fe8eSDavid C Somayajulu #include "ql4_dbg.h" 16bee4fe8eSDavid C Somayajulu #include "ql4_inline.h" 17afaf5a2dSDavid Somayajulu 18afaf5a2dSDavid Somayajulu /* 19afaf5a2dSDavid Somayajulu * Driver version 20afaf5a2dSDavid Somayajulu */ 2147975477SAdrian Bunk static char qla4xxx_version_str[40]; 22afaf5a2dSDavid Somayajulu 23afaf5a2dSDavid Somayajulu /* 24afaf5a2dSDavid Somayajulu * SRB allocation cache 25afaf5a2dSDavid Somayajulu */ 26e18b890bSChristoph Lameter static struct kmem_cache *srb_cachep; 27afaf5a2dSDavid Somayajulu 28afaf5a2dSDavid Somayajulu /* 29afaf5a2dSDavid Somayajulu * Module parameter information and variables 30afaf5a2dSDavid Somayajulu */ 31afaf5a2dSDavid Somayajulu int ql4xdiscoverywait = 60; 32afaf5a2dSDavid Somayajulu module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR); 33afaf5a2dSDavid Somayajulu MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time"); 34afaf5a2dSDavid Somayajulu int ql4xdontresethba = 0; 35afaf5a2dSDavid Somayajulu module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR); 36afaf5a2dSDavid Somayajulu MODULE_PARM_DESC(ql4xdontresethba, 37afaf5a2dSDavid Somayajulu "Dont reset the HBA when the driver gets 0x8002 AEN " 38afaf5a2dSDavid Somayajulu " default it will reset hba :0" 39afaf5a2dSDavid Somayajulu " set to 1 to avoid resetting HBA"); 40afaf5a2dSDavid Somayajulu 4111010fecSAndrew Vasquez int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */ 4211010fecSAndrew Vasquez module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR); 4311010fecSAndrew Vasquez MODULE_PARM_DESC(ql4xextended_error_logging, 44afaf5a2dSDavid Somayajulu "Option to enable extended error logging, " 45afaf5a2dSDavid Somayajulu "Default is 0 - no logging, 1 - debug logging"); 46afaf5a2dSDavid Somayajulu 47477ffb9dSDavid C Somayajulu int ql4_mod_unload = 0; 48477ffb9dSDavid C Somayajulu 49d510d965SMike Christie #define QL4_DEF_QDEPTH 32 50d510d965SMike Christie 51afaf5a2dSDavid Somayajulu /* 52afaf5a2dSDavid Somayajulu * SCSI host template entry points 53afaf5a2dSDavid Somayajulu */ 5447975477SAdrian Bunk static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha); 55afaf5a2dSDavid Somayajulu 56afaf5a2dSDavid Somayajulu /* 57afaf5a2dSDavid Somayajulu * iSCSI template entry points 58afaf5a2dSDavid Somayajulu */ 592174a04eSMike Christie static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost, 602174a04eSMike Christie enum iscsi_tgt_dscvr type, uint32_t enable, 612174a04eSMike Christie struct sockaddr *dst_addr); 62afaf5a2dSDavid Somayajulu static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, 63afaf5a2dSDavid Somayajulu enum iscsi_param param, char *buf); 64afaf5a2dSDavid Somayajulu static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, 65afaf5a2dSDavid Somayajulu enum iscsi_param param, char *buf); 66aa1e93a2SMike Christie static int qla4xxx_host_get_param(struct Scsi_Host *shost, 67aa1e93a2SMike Christie enum iscsi_host_param param, char *buf); 68afaf5a2dSDavid Somayajulu static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session); 695c656af7SMike Christie static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc); 70afaf5a2dSDavid Somayajulu 71afaf5a2dSDavid Somayajulu /* 72afaf5a2dSDavid Somayajulu * SCSI host template entry points 73afaf5a2dSDavid Somayajulu */ 74afaf5a2dSDavid Somayajulu static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, 75afaf5a2dSDavid Somayajulu void (*done) (struct scsi_cmnd *)); 76afaf5a2dSDavid Somayajulu static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd); 77ce545039SMike Christie static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd); 78afaf5a2dSDavid Somayajulu static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd); 79afaf5a2dSDavid Somayajulu static int qla4xxx_slave_alloc(struct scsi_device *device); 80afaf5a2dSDavid Somayajulu static int qla4xxx_slave_configure(struct scsi_device *device); 81afaf5a2dSDavid Somayajulu static void qla4xxx_slave_destroy(struct scsi_device *sdev); 82024f801fSMike Christie static void qla4xxx_scan_start(struct Scsi_Host *shost); 83afaf5a2dSDavid Somayajulu 84afaf5a2dSDavid Somayajulu static struct scsi_host_template qla4xxx_driver_template = { 85afaf5a2dSDavid Somayajulu .module = THIS_MODULE, 86afaf5a2dSDavid Somayajulu .name = DRIVER_NAME, 87afaf5a2dSDavid Somayajulu .proc_name = DRIVER_NAME, 88afaf5a2dSDavid Somayajulu .queuecommand = qla4xxx_queuecommand, 89afaf5a2dSDavid Somayajulu 90afaf5a2dSDavid Somayajulu .eh_device_reset_handler = qla4xxx_eh_device_reset, 91ce545039SMike Christie .eh_target_reset_handler = qla4xxx_eh_target_reset, 92afaf5a2dSDavid Somayajulu .eh_host_reset_handler = qla4xxx_eh_host_reset, 935c656af7SMike Christie .eh_timed_out = qla4xxx_eh_cmd_timed_out, 94afaf5a2dSDavid Somayajulu 95afaf5a2dSDavid Somayajulu .slave_configure = qla4xxx_slave_configure, 96afaf5a2dSDavid Somayajulu .slave_alloc = qla4xxx_slave_alloc, 97afaf5a2dSDavid Somayajulu .slave_destroy = qla4xxx_slave_destroy, 98afaf5a2dSDavid Somayajulu 99921601b7SMike Christie .scan_finished = iscsi_scan_finished, 100024f801fSMike Christie .scan_start = qla4xxx_scan_start, 101921601b7SMike Christie 102afaf5a2dSDavid Somayajulu .this_id = -1, 103afaf5a2dSDavid Somayajulu .cmd_per_lun = 3, 104afaf5a2dSDavid Somayajulu .use_clustering = ENABLE_CLUSTERING, 105afaf5a2dSDavid Somayajulu .sg_tablesize = SG_ALL, 106afaf5a2dSDavid Somayajulu 107afaf5a2dSDavid Somayajulu .max_sectors = 0xFFFF, 108afaf5a2dSDavid Somayajulu }; 109afaf5a2dSDavid Somayajulu 110afaf5a2dSDavid Somayajulu static struct iscsi_transport qla4xxx_iscsi_transport = { 111afaf5a2dSDavid Somayajulu .owner = THIS_MODULE, 112afaf5a2dSDavid Somayajulu .name = DRIVER_NAME, 113d8196ed2SMike Christie .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD | 114d8196ed2SMike Christie CAP_DATA_PATH_OFFLOAD, 115aa1e93a2SMike Christie .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS | 116aa1e93a2SMike Christie ISCSI_TARGET_NAME | ISCSI_TPGT, 1178ad5781aSMike Christie .host_param_mask = ISCSI_HOST_HWADDRESS | 11822236961SMike Christie ISCSI_HOST_IPADDRESS | 1198ad5781aSMike Christie ISCSI_HOST_INITIATOR_NAME, 120afaf5a2dSDavid Somayajulu .tgt_dscvr = qla4xxx_tgt_dscvr, 121afaf5a2dSDavid Somayajulu .get_conn_param = qla4xxx_conn_get_param, 122afaf5a2dSDavid Somayajulu .get_session_param = qla4xxx_sess_get_param, 123aa1e93a2SMike Christie .get_host_param = qla4xxx_host_get_param, 124afaf5a2dSDavid Somayajulu .session_recovery_timedout = qla4xxx_recovery_timedout, 125afaf5a2dSDavid Somayajulu }; 126afaf5a2dSDavid Somayajulu 127afaf5a2dSDavid Somayajulu static struct scsi_transport_template *qla4xxx_scsi_transport; 128afaf5a2dSDavid Somayajulu 1295c656af7SMike Christie static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc) 1305c656af7SMike Christie { 1315c656af7SMike Christie struct iscsi_cls_session *session; 1325c656af7SMike Christie struct ddb_entry *ddb_entry; 1335c656af7SMike Christie 1345c656af7SMike Christie session = starget_to_session(scsi_target(sc->device)); 1355c656af7SMike Christie ddb_entry = session->dd_data; 1365c656af7SMike Christie 1375c656af7SMike Christie /* if we are not logged in then the LLD is going to clean up the cmd */ 1385c656af7SMike Christie if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) 1395c656af7SMike Christie return BLK_EH_RESET_TIMER; 1405c656af7SMike Christie else 1415c656af7SMike Christie return BLK_EH_NOT_HANDLED; 1425c656af7SMike Christie } 1435c656af7SMike Christie 144afaf5a2dSDavid Somayajulu static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session) 145afaf5a2dSDavid Somayajulu { 146afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry = session->dd_data; 147afaf5a2dSDavid Somayajulu struct scsi_qla_host *ha = ddb_entry->ha; 148afaf5a2dSDavid Somayajulu 149568d303bSMike Christie if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { 150afaf5a2dSDavid Somayajulu atomic_set(&ddb_entry->state, DDB_STATE_DEAD); 151afaf5a2dSDavid Somayajulu 152568d303bSMike Christie DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count " 153568d303bSMike Christie "of (%d) secs exhausted, marking device DEAD.\n", 154568d303bSMike Christie ha->host_no, __func__, ddb_entry->fw_ddb_index, 155568d303bSMike Christie ha->port_down_retry_count)); 156568d303bSMike Christie 157568d303bSMike Christie DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc " 158568d303bSMike Christie "flags = 0x%lx\n", 159568d303bSMike Christie ha->host_no, __func__, ha->dpc_flags)); 160afaf5a2dSDavid Somayajulu queue_work(ha->dpc_thread, &ha->dpc_work); 161afaf5a2dSDavid Somayajulu } 162568d303bSMike Christie } 163afaf5a2dSDavid Somayajulu 164aa1e93a2SMike Christie static int qla4xxx_host_get_param(struct Scsi_Host *shost, 165aa1e93a2SMike Christie enum iscsi_host_param param, char *buf) 166aa1e93a2SMike Christie { 167aa1e93a2SMike Christie struct scsi_qla_host *ha = to_qla_host(shost); 168aa1e93a2SMike Christie int len; 169aa1e93a2SMike Christie 170aa1e93a2SMike Christie switch (param) { 171aa1e93a2SMike Christie case ISCSI_HOST_PARAM_HWADDRESS: 1727ffc49a6SMichael Chan len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN); 173aa1e93a2SMike Christie break; 17422236961SMike Christie case ISCSI_HOST_PARAM_IPADDRESS: 17522236961SMike Christie len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0], 17622236961SMike Christie ha->ip_address[1], ha->ip_address[2], 17722236961SMike Christie ha->ip_address[3]); 17822236961SMike Christie break; 1798ad5781aSMike Christie case ISCSI_HOST_PARAM_INITIATOR_NAME: 18022236961SMike Christie len = sprintf(buf, "%s\n", ha->name_string); 1818ad5781aSMike Christie break; 182aa1e93a2SMike Christie default: 183aa1e93a2SMike Christie return -ENOSYS; 184aa1e93a2SMike Christie } 185aa1e93a2SMike Christie 186aa1e93a2SMike Christie return len; 187aa1e93a2SMike Christie } 188aa1e93a2SMike Christie 189afaf5a2dSDavid Somayajulu static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, 190afaf5a2dSDavid Somayajulu enum iscsi_param param, char *buf) 191afaf5a2dSDavid Somayajulu { 192afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry = sess->dd_data; 193afaf5a2dSDavid Somayajulu int len; 194afaf5a2dSDavid Somayajulu 195afaf5a2dSDavid Somayajulu switch (param) { 196afaf5a2dSDavid Somayajulu case ISCSI_PARAM_TARGET_NAME: 197afaf5a2dSDavid Somayajulu len = snprintf(buf, PAGE_SIZE - 1, "%s\n", 198afaf5a2dSDavid Somayajulu ddb_entry->iscsi_name); 199afaf5a2dSDavid Somayajulu break; 200afaf5a2dSDavid Somayajulu case ISCSI_PARAM_TPGT: 201afaf5a2dSDavid Somayajulu len = sprintf(buf, "%u\n", ddb_entry->tpgt); 202afaf5a2dSDavid Somayajulu break; 203afaf5a2dSDavid Somayajulu default: 204afaf5a2dSDavid Somayajulu return -ENOSYS; 205afaf5a2dSDavid Somayajulu } 206afaf5a2dSDavid Somayajulu 207afaf5a2dSDavid Somayajulu return len; 208afaf5a2dSDavid Somayajulu } 209afaf5a2dSDavid Somayajulu 210afaf5a2dSDavid Somayajulu static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, 211afaf5a2dSDavid Somayajulu enum iscsi_param param, char *buf) 212afaf5a2dSDavid Somayajulu { 213afaf5a2dSDavid Somayajulu struct iscsi_cls_session *session; 214afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry; 215afaf5a2dSDavid Somayajulu int len; 216afaf5a2dSDavid Somayajulu 217afaf5a2dSDavid Somayajulu session = iscsi_dev_to_session(conn->dev.parent); 218afaf5a2dSDavid Somayajulu ddb_entry = session->dd_data; 219afaf5a2dSDavid Somayajulu 220afaf5a2dSDavid Somayajulu switch (param) { 221afaf5a2dSDavid Somayajulu case ISCSI_PARAM_CONN_PORT: 222afaf5a2dSDavid Somayajulu len = sprintf(buf, "%hu\n", ddb_entry->port); 223afaf5a2dSDavid Somayajulu break; 224afaf5a2dSDavid Somayajulu case ISCSI_PARAM_CONN_ADDRESS: 225afaf5a2dSDavid Somayajulu /* TODO: what are the ipv6 bits */ 22663779436SHarvey Harrison len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr); 227afaf5a2dSDavid Somayajulu break; 228afaf5a2dSDavid Somayajulu default: 229afaf5a2dSDavid Somayajulu return -ENOSYS; 230afaf5a2dSDavid Somayajulu } 231afaf5a2dSDavid Somayajulu 232afaf5a2dSDavid Somayajulu return len; 233afaf5a2dSDavid Somayajulu } 234afaf5a2dSDavid Somayajulu 2352174a04eSMike Christie static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost, 2362174a04eSMike Christie enum iscsi_tgt_dscvr type, uint32_t enable, 2372174a04eSMike Christie struct sockaddr *dst_addr) 238afaf5a2dSDavid Somayajulu { 239afaf5a2dSDavid Somayajulu struct scsi_qla_host *ha; 240afaf5a2dSDavid Somayajulu struct sockaddr_in *addr; 241afaf5a2dSDavid Somayajulu struct sockaddr_in6 *addr6; 242afaf5a2dSDavid Somayajulu int ret = 0; 243afaf5a2dSDavid Somayajulu 244afaf5a2dSDavid Somayajulu ha = (struct scsi_qla_host *) shost->hostdata; 245afaf5a2dSDavid Somayajulu 246afaf5a2dSDavid Somayajulu switch (type) { 247afaf5a2dSDavid Somayajulu case ISCSI_TGT_DSCVR_SEND_TARGETS: 248afaf5a2dSDavid Somayajulu if (dst_addr->sa_family == AF_INET) { 249afaf5a2dSDavid Somayajulu addr = (struct sockaddr_in *)dst_addr; 250afaf5a2dSDavid Somayajulu if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr, 251afaf5a2dSDavid Somayajulu addr->sin_port) != QLA_SUCCESS) 252afaf5a2dSDavid Somayajulu ret = -EIO; 253afaf5a2dSDavid Somayajulu } else if (dst_addr->sa_family == AF_INET6) { 254afaf5a2dSDavid Somayajulu /* 255afaf5a2dSDavid Somayajulu * TODO: fix qla4xxx_send_tgts 256afaf5a2dSDavid Somayajulu */ 257afaf5a2dSDavid Somayajulu addr6 = (struct sockaddr_in6 *)dst_addr; 258afaf5a2dSDavid Somayajulu if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr, 259afaf5a2dSDavid Somayajulu addr6->sin6_port) != QLA_SUCCESS) 260afaf5a2dSDavid Somayajulu ret = -EIO; 261afaf5a2dSDavid Somayajulu } else 262afaf5a2dSDavid Somayajulu ret = -ENOSYS; 263afaf5a2dSDavid Somayajulu break; 264afaf5a2dSDavid Somayajulu default: 265afaf5a2dSDavid Somayajulu ret = -ENOSYS; 266afaf5a2dSDavid Somayajulu } 267afaf5a2dSDavid Somayajulu return ret; 268afaf5a2dSDavid Somayajulu } 269afaf5a2dSDavid Somayajulu 270afaf5a2dSDavid Somayajulu void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry) 271afaf5a2dSDavid Somayajulu { 272afaf5a2dSDavid Somayajulu if (!ddb_entry->sess) 273afaf5a2dSDavid Somayajulu return; 274afaf5a2dSDavid Somayajulu 275afaf5a2dSDavid Somayajulu if (ddb_entry->conn) { 27626974789SMike Christie atomic_set(&ddb_entry->state, DDB_STATE_DEAD); 277afaf5a2dSDavid Somayajulu iscsi_remove_session(ddb_entry->sess); 278afaf5a2dSDavid Somayajulu } 279afaf5a2dSDavid Somayajulu iscsi_free_session(ddb_entry->sess); 280afaf5a2dSDavid Somayajulu } 281afaf5a2dSDavid Somayajulu 282afaf5a2dSDavid Somayajulu int qla4xxx_add_sess(struct ddb_entry *ddb_entry) 283afaf5a2dSDavid Somayajulu { 284afaf5a2dSDavid Somayajulu int err; 285afaf5a2dSDavid Somayajulu 28626974789SMike Christie ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count; 287afaf5a2dSDavid Somayajulu err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index); 288afaf5a2dSDavid Somayajulu if (err) { 289afaf5a2dSDavid Somayajulu DEBUG2(printk(KERN_ERR "Could not add session.\n")); 290afaf5a2dSDavid Somayajulu return err; 291afaf5a2dSDavid Somayajulu } 292afaf5a2dSDavid Somayajulu 2935d91e209SMike Christie ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0); 294afaf5a2dSDavid Somayajulu if (!ddb_entry->conn) { 295afaf5a2dSDavid Somayajulu iscsi_remove_session(ddb_entry->sess); 296afaf5a2dSDavid Somayajulu DEBUG2(printk(KERN_ERR "Could not add connection.\n")); 297afaf5a2dSDavid Somayajulu return -ENOMEM; 298afaf5a2dSDavid Somayajulu } 299b635930dSMike Christie 300b635930dSMike Christie /* finally ready to go */ 301b635930dSMike Christie iscsi_unblock_session(ddb_entry->sess); 302afaf5a2dSDavid Somayajulu return 0; 303afaf5a2dSDavid Somayajulu } 304afaf5a2dSDavid Somayajulu 305afaf5a2dSDavid Somayajulu struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha) 306afaf5a2dSDavid Somayajulu { 307afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry; 308afaf5a2dSDavid Somayajulu struct iscsi_cls_session *sess; 309afaf5a2dSDavid Somayajulu 3105d91e209SMike Christie sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport, 3115d91e209SMike Christie sizeof(struct ddb_entry)); 312afaf5a2dSDavid Somayajulu if (!sess) 313afaf5a2dSDavid Somayajulu return NULL; 314afaf5a2dSDavid Somayajulu 315afaf5a2dSDavid Somayajulu ddb_entry = sess->dd_data; 316afaf5a2dSDavid Somayajulu memset(ddb_entry, 0, sizeof(*ddb_entry)); 317afaf5a2dSDavid Somayajulu ddb_entry->ha = ha; 318afaf5a2dSDavid Somayajulu ddb_entry->sess = sess; 319afaf5a2dSDavid Somayajulu return ddb_entry; 320afaf5a2dSDavid Somayajulu } 321afaf5a2dSDavid Somayajulu 322024f801fSMike Christie static void qla4xxx_scan_start(struct Scsi_Host *shost) 323024f801fSMike Christie { 324024f801fSMike Christie struct scsi_qla_host *ha = shost_priv(shost); 325024f801fSMike Christie struct ddb_entry *ddb_entry, *ddbtemp; 326024f801fSMike Christie 327024f801fSMike Christie /* finish setup of sessions that were already setup in firmware */ 328024f801fSMike Christie list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) { 329024f801fSMike Christie if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) 330024f801fSMike Christie qla4xxx_add_sess(ddb_entry); 331024f801fSMike Christie } 332024f801fSMike Christie } 333024f801fSMike Christie 334afaf5a2dSDavid Somayajulu /* 335afaf5a2dSDavid Somayajulu * Timer routines 336afaf5a2dSDavid Somayajulu */ 337afaf5a2dSDavid Somayajulu 338afaf5a2dSDavid Somayajulu static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func, 339afaf5a2dSDavid Somayajulu unsigned long interval) 340afaf5a2dSDavid Somayajulu { 341afaf5a2dSDavid Somayajulu DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n", 342afaf5a2dSDavid Somayajulu __func__, ha->host->host_no)); 343afaf5a2dSDavid Somayajulu init_timer(&ha->timer); 344afaf5a2dSDavid Somayajulu ha->timer.expires = jiffies + interval * HZ; 345afaf5a2dSDavid Somayajulu ha->timer.data = (unsigned long)ha; 346afaf5a2dSDavid Somayajulu ha->timer.function = (void (*)(unsigned long))func; 347afaf5a2dSDavid Somayajulu add_timer(&ha->timer); 348afaf5a2dSDavid Somayajulu ha->timer_active = 1; 349afaf5a2dSDavid Somayajulu } 350afaf5a2dSDavid Somayajulu 351afaf5a2dSDavid Somayajulu static void qla4xxx_stop_timer(struct scsi_qla_host *ha) 352afaf5a2dSDavid Somayajulu { 353afaf5a2dSDavid Somayajulu del_timer_sync(&ha->timer); 354afaf5a2dSDavid Somayajulu ha->timer_active = 0; 355afaf5a2dSDavid Somayajulu } 356afaf5a2dSDavid Somayajulu 357afaf5a2dSDavid Somayajulu /*** 358afaf5a2dSDavid Somayajulu * qla4xxx_mark_device_missing - mark a device as missing. 359afaf5a2dSDavid Somayajulu * @ha: Pointer to host adapter structure. 360afaf5a2dSDavid Somayajulu * @ddb_entry: Pointer to device database entry 361afaf5a2dSDavid Somayajulu * 362afaf5a2dSDavid Somayajulu * This routine marks a device missing and resets the relogin retry count. 363afaf5a2dSDavid Somayajulu **/ 364afaf5a2dSDavid Somayajulu void qla4xxx_mark_device_missing(struct scsi_qla_host *ha, 365afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry) 366afaf5a2dSDavid Somayajulu { 367afaf5a2dSDavid Somayajulu atomic_set(&ddb_entry->state, DDB_STATE_MISSING); 368afaf5a2dSDavid Somayajulu DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n", 369afaf5a2dSDavid Somayajulu ha->host_no, ddb_entry->bus, ddb_entry->target, 370afaf5a2dSDavid Somayajulu ddb_entry->fw_ddb_index)); 371b635930dSMike Christie iscsi_block_session(ddb_entry->sess); 372e5bd7b54SMike Christie iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED); 373afaf5a2dSDavid Somayajulu } 374afaf5a2dSDavid Somayajulu 375afaf5a2dSDavid Somayajulu static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha, 376afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry, 377afaf5a2dSDavid Somayajulu struct scsi_cmnd *cmd, 378afaf5a2dSDavid Somayajulu void (*done)(struct scsi_cmnd *)) 379afaf5a2dSDavid Somayajulu { 380afaf5a2dSDavid Somayajulu struct srb *srb; 381afaf5a2dSDavid Somayajulu 382afaf5a2dSDavid Somayajulu srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC); 383afaf5a2dSDavid Somayajulu if (!srb) 384afaf5a2dSDavid Somayajulu return srb; 385afaf5a2dSDavid Somayajulu 386afaf5a2dSDavid Somayajulu atomic_set(&srb->ref_count, 1); 387afaf5a2dSDavid Somayajulu srb->ha = ha; 388afaf5a2dSDavid Somayajulu srb->ddb = ddb_entry; 389afaf5a2dSDavid Somayajulu srb->cmd = cmd; 390afaf5a2dSDavid Somayajulu srb->flags = 0; 391afaf5a2dSDavid Somayajulu cmd->SCp.ptr = (void *)srb; 392afaf5a2dSDavid Somayajulu cmd->scsi_done = done; 393afaf5a2dSDavid Somayajulu 394afaf5a2dSDavid Somayajulu return srb; 395afaf5a2dSDavid Somayajulu } 396afaf5a2dSDavid Somayajulu 397afaf5a2dSDavid Somayajulu static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb) 398afaf5a2dSDavid Somayajulu { 399afaf5a2dSDavid Somayajulu struct scsi_cmnd *cmd = srb->cmd; 400afaf5a2dSDavid Somayajulu 401afaf5a2dSDavid Somayajulu if (srb->flags & SRB_DMA_VALID) { 4025f7186c8SFUJITA Tomonori scsi_dma_unmap(cmd); 403afaf5a2dSDavid Somayajulu srb->flags &= ~SRB_DMA_VALID; 404afaf5a2dSDavid Somayajulu } 405afaf5a2dSDavid Somayajulu cmd->SCp.ptr = NULL; 406afaf5a2dSDavid Somayajulu } 407afaf5a2dSDavid Somayajulu 408afaf5a2dSDavid Somayajulu void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb) 409afaf5a2dSDavid Somayajulu { 410afaf5a2dSDavid Somayajulu struct scsi_cmnd *cmd = srb->cmd; 411afaf5a2dSDavid Somayajulu 412afaf5a2dSDavid Somayajulu qla4xxx_srb_free_dma(ha, srb); 413afaf5a2dSDavid Somayajulu 414afaf5a2dSDavid Somayajulu mempool_free(srb, ha->srb_mempool); 415afaf5a2dSDavid Somayajulu 416afaf5a2dSDavid Somayajulu cmd->scsi_done(cmd); 417afaf5a2dSDavid Somayajulu } 418afaf5a2dSDavid Somayajulu 419afaf5a2dSDavid Somayajulu /** 420afaf5a2dSDavid Somayajulu * qla4xxx_queuecommand - scsi layer issues scsi command to driver. 421afaf5a2dSDavid Somayajulu * @cmd: Pointer to Linux's SCSI command structure 422afaf5a2dSDavid Somayajulu * @done_fn: Function that the driver calls to notify the SCSI mid-layer 423afaf5a2dSDavid Somayajulu * that the command has been processed. 424afaf5a2dSDavid Somayajulu * 425afaf5a2dSDavid Somayajulu * Remarks: 426afaf5a2dSDavid Somayajulu * This routine is invoked by Linux to send a SCSI command to the driver. 427afaf5a2dSDavid Somayajulu * The mid-level driver tries to ensure that queuecommand never gets 428afaf5a2dSDavid Somayajulu * invoked concurrently with itself or the interrupt handler (although 429afaf5a2dSDavid Somayajulu * the interrupt handler may call this routine as part of request- 430afaf5a2dSDavid Somayajulu * completion handling). Unfortunely, it sometimes calls the scheduler 431afaf5a2dSDavid Somayajulu * in interrupt context which is a big NO! NO!. 432afaf5a2dSDavid Somayajulu **/ 433afaf5a2dSDavid Somayajulu static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, 434afaf5a2dSDavid Somayajulu void (*done)(struct scsi_cmnd *)) 435afaf5a2dSDavid Somayajulu { 436afaf5a2dSDavid Somayajulu struct scsi_qla_host *ha = to_qla_host(cmd->device->host); 437afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry = cmd->device->hostdata; 4387fb1921bSMike Christie struct iscsi_cls_session *sess = ddb_entry->sess; 439afaf5a2dSDavid Somayajulu struct srb *srb; 440afaf5a2dSDavid Somayajulu int rval; 441afaf5a2dSDavid Somayajulu 4427fb1921bSMike Christie if (!sess) { 4437fb1921bSMike Christie cmd->result = DID_IMM_RETRY << 16; 4447fb1921bSMike Christie goto qc_fail_command; 4457fb1921bSMike Christie } 4467fb1921bSMike Christie 4477fb1921bSMike Christie rval = iscsi_session_chkready(sess); 4487fb1921bSMike Christie if (rval) { 4497fb1921bSMike Christie cmd->result = rval; 4507fb1921bSMike Christie goto qc_fail_command; 4517fb1921bSMike Christie } 4527fb1921bSMike Christie 453afaf5a2dSDavid Somayajulu if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { 454afaf5a2dSDavid Somayajulu if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) { 455afaf5a2dSDavid Somayajulu cmd->result = DID_NO_CONNECT << 16; 456afaf5a2dSDavid Somayajulu goto qc_fail_command; 457afaf5a2dSDavid Somayajulu } 458c5e98e91SMike Christie return SCSI_MLQUEUE_TARGET_BUSY; 459afaf5a2dSDavid Somayajulu } 460afaf5a2dSDavid Somayajulu 461477ffb9dSDavid C Somayajulu if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) 462477ffb9dSDavid C Somayajulu goto qc_host_busy; 463477ffb9dSDavid C Somayajulu 464afaf5a2dSDavid Somayajulu spin_unlock_irq(ha->host->host_lock); 465afaf5a2dSDavid Somayajulu 466afaf5a2dSDavid Somayajulu srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done); 467afaf5a2dSDavid Somayajulu if (!srb) 468afaf5a2dSDavid Somayajulu goto qc_host_busy_lock; 469afaf5a2dSDavid Somayajulu 470afaf5a2dSDavid Somayajulu rval = qla4xxx_send_command_to_isp(ha, srb); 471afaf5a2dSDavid Somayajulu if (rval != QLA_SUCCESS) 472afaf5a2dSDavid Somayajulu goto qc_host_busy_free_sp; 473afaf5a2dSDavid Somayajulu 474afaf5a2dSDavid Somayajulu spin_lock_irq(ha->host->host_lock); 475afaf5a2dSDavid Somayajulu return 0; 476afaf5a2dSDavid Somayajulu 477afaf5a2dSDavid Somayajulu qc_host_busy_free_sp: 478afaf5a2dSDavid Somayajulu qla4xxx_srb_free_dma(ha, srb); 479afaf5a2dSDavid Somayajulu mempool_free(srb, ha->srb_mempool); 480afaf5a2dSDavid Somayajulu 481afaf5a2dSDavid Somayajulu qc_host_busy_lock: 482afaf5a2dSDavid Somayajulu spin_lock_irq(ha->host->host_lock); 483afaf5a2dSDavid Somayajulu 484afaf5a2dSDavid Somayajulu qc_host_busy: 485afaf5a2dSDavid Somayajulu return SCSI_MLQUEUE_HOST_BUSY; 486afaf5a2dSDavid Somayajulu 487afaf5a2dSDavid Somayajulu qc_fail_command: 488afaf5a2dSDavid Somayajulu done(cmd); 489afaf5a2dSDavid Somayajulu 490afaf5a2dSDavid Somayajulu return 0; 491afaf5a2dSDavid Somayajulu } 492afaf5a2dSDavid Somayajulu 493afaf5a2dSDavid Somayajulu /** 494afaf5a2dSDavid Somayajulu * qla4xxx_mem_free - frees memory allocated to adapter 495afaf5a2dSDavid Somayajulu * @ha: Pointer to host adapter structure. 496afaf5a2dSDavid Somayajulu * 497afaf5a2dSDavid Somayajulu * Frees memory previously allocated by qla4xxx_mem_alloc 498afaf5a2dSDavid Somayajulu **/ 499afaf5a2dSDavid Somayajulu static void qla4xxx_mem_free(struct scsi_qla_host *ha) 500afaf5a2dSDavid Somayajulu { 501afaf5a2dSDavid Somayajulu if (ha->queues) 502afaf5a2dSDavid Somayajulu dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues, 503afaf5a2dSDavid Somayajulu ha->queues_dma); 504afaf5a2dSDavid Somayajulu 505afaf5a2dSDavid Somayajulu ha->queues_len = 0; 506afaf5a2dSDavid Somayajulu ha->queues = NULL; 507afaf5a2dSDavid Somayajulu ha->queues_dma = 0; 508afaf5a2dSDavid Somayajulu ha->request_ring = NULL; 509afaf5a2dSDavid Somayajulu ha->request_dma = 0; 510afaf5a2dSDavid Somayajulu ha->response_ring = NULL; 511afaf5a2dSDavid Somayajulu ha->response_dma = 0; 512afaf5a2dSDavid Somayajulu ha->shadow_regs = NULL; 513afaf5a2dSDavid Somayajulu ha->shadow_regs_dma = 0; 514afaf5a2dSDavid Somayajulu 515afaf5a2dSDavid Somayajulu /* Free srb pool. */ 516afaf5a2dSDavid Somayajulu if (ha->srb_mempool) 517afaf5a2dSDavid Somayajulu mempool_destroy(ha->srb_mempool); 518afaf5a2dSDavid Somayajulu 519afaf5a2dSDavid Somayajulu ha->srb_mempool = NULL; 520afaf5a2dSDavid Somayajulu 521afaf5a2dSDavid Somayajulu /* release io space registers */ 522afaf5a2dSDavid Somayajulu if (ha->reg) 523afaf5a2dSDavid Somayajulu iounmap(ha->reg); 524afaf5a2dSDavid Somayajulu pci_release_regions(ha->pdev); 525afaf5a2dSDavid Somayajulu } 526afaf5a2dSDavid Somayajulu 527afaf5a2dSDavid Somayajulu /** 528afaf5a2dSDavid Somayajulu * qla4xxx_mem_alloc - allocates memory for use by adapter. 529afaf5a2dSDavid Somayajulu * @ha: Pointer to host adapter structure 530afaf5a2dSDavid Somayajulu * 531afaf5a2dSDavid Somayajulu * Allocates DMA memory for request and response queues. Also allocates memory 532afaf5a2dSDavid Somayajulu * for srbs. 533afaf5a2dSDavid Somayajulu **/ 534afaf5a2dSDavid Somayajulu static int qla4xxx_mem_alloc(struct scsi_qla_host *ha) 535afaf5a2dSDavid Somayajulu { 536afaf5a2dSDavid Somayajulu unsigned long align; 537afaf5a2dSDavid Somayajulu 538afaf5a2dSDavid Somayajulu /* Allocate contiguous block of DMA memory for queues. */ 539afaf5a2dSDavid Somayajulu ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + 540afaf5a2dSDavid Somayajulu (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) + 541afaf5a2dSDavid Somayajulu sizeof(struct shadow_regs) + 542afaf5a2dSDavid Somayajulu MEM_ALIGN_VALUE + 543afaf5a2dSDavid Somayajulu (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); 544afaf5a2dSDavid Somayajulu ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len, 545afaf5a2dSDavid Somayajulu &ha->queues_dma, GFP_KERNEL); 546afaf5a2dSDavid Somayajulu if (ha->queues == NULL) { 547afaf5a2dSDavid Somayajulu dev_warn(&ha->pdev->dev, 548afaf5a2dSDavid Somayajulu "Memory Allocation failed - queues.\n"); 549afaf5a2dSDavid Somayajulu 550afaf5a2dSDavid Somayajulu goto mem_alloc_error_exit; 551afaf5a2dSDavid Somayajulu } 552afaf5a2dSDavid Somayajulu memset(ha->queues, 0, ha->queues_len); 553afaf5a2dSDavid Somayajulu 554afaf5a2dSDavid Somayajulu /* 555afaf5a2dSDavid Somayajulu * As per RISC alignment requirements -- the bus-address must be a 556afaf5a2dSDavid Somayajulu * multiple of the request-ring size (in bytes). 557afaf5a2dSDavid Somayajulu */ 558afaf5a2dSDavid Somayajulu align = 0; 559afaf5a2dSDavid Somayajulu if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1)) 560afaf5a2dSDavid Somayajulu align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma & 561afaf5a2dSDavid Somayajulu (MEM_ALIGN_VALUE - 1)); 562afaf5a2dSDavid Somayajulu 563afaf5a2dSDavid Somayajulu /* Update request and response queue pointers. */ 564afaf5a2dSDavid Somayajulu ha->request_dma = ha->queues_dma + align; 565afaf5a2dSDavid Somayajulu ha->request_ring = (struct queue_entry *) (ha->queues + align); 566afaf5a2dSDavid Somayajulu ha->response_dma = ha->queues_dma + align + 567afaf5a2dSDavid Somayajulu (REQUEST_QUEUE_DEPTH * QUEUE_SIZE); 568afaf5a2dSDavid Somayajulu ha->response_ring = (struct queue_entry *) (ha->queues + align + 569afaf5a2dSDavid Somayajulu (REQUEST_QUEUE_DEPTH * 570afaf5a2dSDavid Somayajulu QUEUE_SIZE)); 571afaf5a2dSDavid Somayajulu ha->shadow_regs_dma = ha->queues_dma + align + 572afaf5a2dSDavid Somayajulu (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + 573afaf5a2dSDavid Somayajulu (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE); 574afaf5a2dSDavid Somayajulu ha->shadow_regs = (struct shadow_regs *) (ha->queues + align + 575afaf5a2dSDavid Somayajulu (REQUEST_QUEUE_DEPTH * 576afaf5a2dSDavid Somayajulu QUEUE_SIZE) + 577afaf5a2dSDavid Somayajulu (RESPONSE_QUEUE_DEPTH * 578afaf5a2dSDavid Somayajulu QUEUE_SIZE)); 579afaf5a2dSDavid Somayajulu 580afaf5a2dSDavid Somayajulu /* Allocate memory for srb pool. */ 581afaf5a2dSDavid Somayajulu ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab, 582afaf5a2dSDavid Somayajulu mempool_free_slab, srb_cachep); 583afaf5a2dSDavid Somayajulu if (ha->srb_mempool == NULL) { 584afaf5a2dSDavid Somayajulu dev_warn(&ha->pdev->dev, 585afaf5a2dSDavid Somayajulu "Memory Allocation failed - SRB Pool.\n"); 586afaf5a2dSDavid Somayajulu 587afaf5a2dSDavid Somayajulu goto mem_alloc_error_exit; 588afaf5a2dSDavid Somayajulu } 589afaf5a2dSDavid Somayajulu 590afaf5a2dSDavid Somayajulu return QLA_SUCCESS; 591afaf5a2dSDavid Somayajulu 592afaf5a2dSDavid Somayajulu mem_alloc_error_exit: 593afaf5a2dSDavid Somayajulu qla4xxx_mem_free(ha); 594afaf5a2dSDavid Somayajulu return QLA_ERROR; 595afaf5a2dSDavid Somayajulu } 596afaf5a2dSDavid Somayajulu 597afaf5a2dSDavid Somayajulu /** 598afaf5a2dSDavid Somayajulu * qla4xxx_timer - checks every second for work to do. 599afaf5a2dSDavid Somayajulu * @ha: Pointer to host adapter structure. 600afaf5a2dSDavid Somayajulu **/ 601afaf5a2dSDavid Somayajulu static void qla4xxx_timer(struct scsi_qla_host *ha) 602afaf5a2dSDavid Somayajulu { 603afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry, *dtemp; 604afaf5a2dSDavid Somayajulu int start_dpc = 0; 605afaf5a2dSDavid Somayajulu 606afaf5a2dSDavid Somayajulu /* Search for relogin's to time-out and port down retry. */ 607afaf5a2dSDavid Somayajulu list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) { 608afaf5a2dSDavid Somayajulu /* Count down time between sending relogins */ 609afaf5a2dSDavid Somayajulu if (adapter_up(ha) && 610afaf5a2dSDavid Somayajulu !test_bit(DF_RELOGIN, &ddb_entry->flags) && 611afaf5a2dSDavid Somayajulu atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { 612afaf5a2dSDavid Somayajulu if (atomic_read(&ddb_entry->retry_relogin_timer) != 613afaf5a2dSDavid Somayajulu INVALID_ENTRY) { 614afaf5a2dSDavid Somayajulu if (atomic_read(&ddb_entry->retry_relogin_timer) 615afaf5a2dSDavid Somayajulu == 0) { 616afaf5a2dSDavid Somayajulu atomic_set(&ddb_entry-> 617afaf5a2dSDavid Somayajulu retry_relogin_timer, 618afaf5a2dSDavid Somayajulu INVALID_ENTRY); 619afaf5a2dSDavid Somayajulu set_bit(DPC_RELOGIN_DEVICE, 620afaf5a2dSDavid Somayajulu &ha->dpc_flags); 621afaf5a2dSDavid Somayajulu set_bit(DF_RELOGIN, &ddb_entry->flags); 622afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: %s: index [%d]" 623afaf5a2dSDavid Somayajulu " login device\n", 624afaf5a2dSDavid Somayajulu ha->host_no, __func__, 625afaf5a2dSDavid Somayajulu ddb_entry->fw_ddb_index)); 626afaf5a2dSDavid Somayajulu } else 627afaf5a2dSDavid Somayajulu atomic_dec(&ddb_entry-> 628afaf5a2dSDavid Somayajulu retry_relogin_timer); 629afaf5a2dSDavid Somayajulu } 630afaf5a2dSDavid Somayajulu } 631afaf5a2dSDavid Somayajulu 632afaf5a2dSDavid Somayajulu /* Wait for relogin to timeout */ 633afaf5a2dSDavid Somayajulu if (atomic_read(&ddb_entry->relogin_timer) && 634afaf5a2dSDavid Somayajulu (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) { 635afaf5a2dSDavid Somayajulu /* 636afaf5a2dSDavid Somayajulu * If the relogin times out and the device is 637afaf5a2dSDavid Somayajulu * still NOT ONLINE then try and relogin again. 638afaf5a2dSDavid Somayajulu */ 639afaf5a2dSDavid Somayajulu if (atomic_read(&ddb_entry->state) != 640afaf5a2dSDavid Somayajulu DDB_STATE_ONLINE && 641afaf5a2dSDavid Somayajulu ddb_entry->fw_ddb_device_state == 642afaf5a2dSDavid Somayajulu DDB_DS_SESSION_FAILED) { 643afaf5a2dSDavid Somayajulu /* Reset retry relogin timer */ 644afaf5a2dSDavid Somayajulu atomic_inc(&ddb_entry->relogin_retry_count); 645afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: index[%d] relogin" 646afaf5a2dSDavid Somayajulu " timed out-retrying" 647afaf5a2dSDavid Somayajulu " relogin (%d)\n", 648afaf5a2dSDavid Somayajulu ha->host_no, 649afaf5a2dSDavid Somayajulu ddb_entry->fw_ddb_index, 650afaf5a2dSDavid Somayajulu atomic_read(&ddb_entry-> 651afaf5a2dSDavid Somayajulu relogin_retry_count)) 652afaf5a2dSDavid Somayajulu ); 653afaf5a2dSDavid Somayajulu start_dpc++; 654afaf5a2dSDavid Somayajulu DEBUG(printk("scsi%ld:%d:%d: index [%d] " 655afaf5a2dSDavid Somayajulu "initate relogin after" 656afaf5a2dSDavid Somayajulu " %d seconds\n", 657afaf5a2dSDavid Somayajulu ha->host_no, ddb_entry->bus, 658afaf5a2dSDavid Somayajulu ddb_entry->target, 659afaf5a2dSDavid Somayajulu ddb_entry->fw_ddb_index, 660afaf5a2dSDavid Somayajulu ddb_entry->default_time2wait + 4) 661afaf5a2dSDavid Somayajulu ); 662afaf5a2dSDavid Somayajulu 663afaf5a2dSDavid Somayajulu atomic_set(&ddb_entry->retry_relogin_timer, 664afaf5a2dSDavid Somayajulu ddb_entry->default_time2wait + 4); 665afaf5a2dSDavid Somayajulu } 666afaf5a2dSDavid Somayajulu } 667afaf5a2dSDavid Somayajulu } 668afaf5a2dSDavid Somayajulu 669afaf5a2dSDavid Somayajulu /* Check for heartbeat interval. */ 670afaf5a2dSDavid Somayajulu if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE && 671afaf5a2dSDavid Somayajulu ha->heartbeat_interval != 0) { 672afaf5a2dSDavid Somayajulu ha->seconds_since_last_heartbeat++; 673afaf5a2dSDavid Somayajulu if (ha->seconds_since_last_heartbeat > 674afaf5a2dSDavid Somayajulu ha->heartbeat_interval + 2) 675afaf5a2dSDavid Somayajulu set_bit(DPC_RESET_HA, &ha->dpc_flags); 676afaf5a2dSDavid Somayajulu } 677afaf5a2dSDavid Somayajulu 678afaf5a2dSDavid Somayajulu 679afaf5a2dSDavid Somayajulu /* Wakeup the dpc routine for this adapter, if needed. */ 680afaf5a2dSDavid Somayajulu if ((start_dpc || 681afaf5a2dSDavid Somayajulu test_bit(DPC_RESET_HA, &ha->dpc_flags) || 682afaf5a2dSDavid Somayajulu test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) || 683afaf5a2dSDavid Somayajulu test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) || 684afaf5a2dSDavid Somayajulu test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || 685afaf5a2dSDavid Somayajulu test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || 686afaf5a2dSDavid Somayajulu test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) || 687afaf5a2dSDavid Somayajulu test_bit(DPC_AEN, &ha->dpc_flags)) && 688afaf5a2dSDavid Somayajulu ha->dpc_thread) { 689afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: %s: scheduling dpc routine" 690afaf5a2dSDavid Somayajulu " - dpc flags = 0x%lx\n", 691afaf5a2dSDavid Somayajulu ha->host_no, __func__, ha->dpc_flags)); 692afaf5a2dSDavid Somayajulu queue_work(ha->dpc_thread, &ha->dpc_work); 693afaf5a2dSDavid Somayajulu } 694afaf5a2dSDavid Somayajulu 695afaf5a2dSDavid Somayajulu /* Reschedule timer thread to call us back in one second */ 696afaf5a2dSDavid Somayajulu mod_timer(&ha->timer, jiffies + HZ); 697afaf5a2dSDavid Somayajulu 698afaf5a2dSDavid Somayajulu DEBUG2(ha->seconds_since_last_intr++); 699afaf5a2dSDavid Somayajulu } 700afaf5a2dSDavid Somayajulu 701afaf5a2dSDavid Somayajulu /** 702afaf5a2dSDavid Somayajulu * qla4xxx_cmd_wait - waits for all outstanding commands to complete 703afaf5a2dSDavid Somayajulu * @ha: Pointer to host adapter structure. 704afaf5a2dSDavid Somayajulu * 705afaf5a2dSDavid Somayajulu * This routine stalls the driver until all outstanding commands are returned. 706afaf5a2dSDavid Somayajulu * Caller must release the Hardware Lock prior to calling this routine. 707afaf5a2dSDavid Somayajulu **/ 708afaf5a2dSDavid Somayajulu static int qla4xxx_cmd_wait(struct scsi_qla_host *ha) 709afaf5a2dSDavid Somayajulu { 710afaf5a2dSDavid Somayajulu uint32_t index = 0; 711afaf5a2dSDavid Somayajulu int stat = QLA_SUCCESS; 712afaf5a2dSDavid Somayajulu unsigned long flags; 713afaf5a2dSDavid Somayajulu struct scsi_cmnd *cmd; 714afaf5a2dSDavid Somayajulu int wait_cnt = WAIT_CMD_TOV; /* 715afaf5a2dSDavid Somayajulu * Initialized for 30 seconds as we 716afaf5a2dSDavid Somayajulu * expect all commands to retuned 717afaf5a2dSDavid Somayajulu * ASAP. 718afaf5a2dSDavid Somayajulu */ 719afaf5a2dSDavid Somayajulu 720afaf5a2dSDavid Somayajulu while (wait_cnt) { 721afaf5a2dSDavid Somayajulu spin_lock_irqsave(&ha->hardware_lock, flags); 722afaf5a2dSDavid Somayajulu /* Find a command that hasn't completed. */ 723afaf5a2dSDavid Somayajulu for (index = 0; index < ha->host->can_queue; index++) { 724afaf5a2dSDavid Somayajulu cmd = scsi_host_find_tag(ha->host, index); 725afaf5a2dSDavid Somayajulu if (cmd != NULL) 726afaf5a2dSDavid Somayajulu break; 727afaf5a2dSDavid Somayajulu } 728afaf5a2dSDavid Somayajulu spin_unlock_irqrestore(&ha->hardware_lock, flags); 729afaf5a2dSDavid Somayajulu 730afaf5a2dSDavid Somayajulu /* If No Commands are pending, wait is complete */ 731afaf5a2dSDavid Somayajulu if (index == ha->host->can_queue) { 732afaf5a2dSDavid Somayajulu break; 733afaf5a2dSDavid Somayajulu } 734afaf5a2dSDavid Somayajulu 735afaf5a2dSDavid Somayajulu /* If we timed out on waiting for commands to come back 736afaf5a2dSDavid Somayajulu * return ERROR. 737afaf5a2dSDavid Somayajulu */ 738afaf5a2dSDavid Somayajulu wait_cnt--; 739afaf5a2dSDavid Somayajulu if (wait_cnt == 0) 740afaf5a2dSDavid Somayajulu stat = QLA_ERROR; 741afaf5a2dSDavid Somayajulu else { 742afaf5a2dSDavid Somayajulu msleep(1000); 743afaf5a2dSDavid Somayajulu } 744afaf5a2dSDavid Somayajulu } /* End of While (wait_cnt) */ 745afaf5a2dSDavid Somayajulu 746afaf5a2dSDavid Somayajulu return stat; 747afaf5a2dSDavid Somayajulu } 748afaf5a2dSDavid Somayajulu 749bee4fe8eSDavid C Somayajulu void qla4xxx_hw_reset(struct scsi_qla_host *ha) 750afaf5a2dSDavid Somayajulu { 751afaf5a2dSDavid Somayajulu uint32_t ctrl_status; 752477ffb9dSDavid C Somayajulu unsigned long flags = 0; 753477ffb9dSDavid C Somayajulu 754477ffb9dSDavid C Somayajulu DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__)); 755afaf5a2dSDavid Somayajulu 756afaf5a2dSDavid Somayajulu spin_lock_irqsave(&ha->hardware_lock, flags); 757afaf5a2dSDavid Somayajulu 758afaf5a2dSDavid Somayajulu /* 759afaf5a2dSDavid Somayajulu * If the SCSI Reset Interrupt bit is set, clear it. 760afaf5a2dSDavid Somayajulu * Otherwise, the Soft Reset won't work. 761afaf5a2dSDavid Somayajulu */ 762afaf5a2dSDavid Somayajulu ctrl_status = readw(&ha->reg->ctrl_status); 763afaf5a2dSDavid Somayajulu if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) 764afaf5a2dSDavid Somayajulu writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); 765afaf5a2dSDavid Somayajulu 766afaf5a2dSDavid Somayajulu /* Issue Soft Reset */ 767afaf5a2dSDavid Somayajulu writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status); 768afaf5a2dSDavid Somayajulu readl(&ha->reg->ctrl_status); 769afaf5a2dSDavid Somayajulu 770afaf5a2dSDavid Somayajulu spin_unlock_irqrestore(&ha->hardware_lock, flags); 771477ffb9dSDavid C Somayajulu } 772477ffb9dSDavid C Somayajulu 773477ffb9dSDavid C Somayajulu /** 774477ffb9dSDavid C Somayajulu * qla4xxx_soft_reset - performs soft reset. 775477ffb9dSDavid C Somayajulu * @ha: Pointer to host adapter structure. 776477ffb9dSDavid C Somayajulu **/ 777477ffb9dSDavid C Somayajulu int qla4xxx_soft_reset(struct scsi_qla_host *ha) 778477ffb9dSDavid C Somayajulu { 779477ffb9dSDavid C Somayajulu uint32_t max_wait_time; 780477ffb9dSDavid C Somayajulu unsigned long flags = 0; 781477ffb9dSDavid C Somayajulu int status = QLA_ERROR; 782477ffb9dSDavid C Somayajulu uint32_t ctrl_status; 783477ffb9dSDavid C Somayajulu 784477ffb9dSDavid C Somayajulu qla4xxx_hw_reset(ha); 785afaf5a2dSDavid Somayajulu 786afaf5a2dSDavid Somayajulu /* Wait until the Network Reset Intr bit is cleared */ 787afaf5a2dSDavid Somayajulu max_wait_time = RESET_INTR_TOV; 788afaf5a2dSDavid Somayajulu do { 789afaf5a2dSDavid Somayajulu spin_lock_irqsave(&ha->hardware_lock, flags); 790afaf5a2dSDavid Somayajulu ctrl_status = readw(&ha->reg->ctrl_status); 791afaf5a2dSDavid Somayajulu spin_unlock_irqrestore(&ha->hardware_lock, flags); 792afaf5a2dSDavid Somayajulu 793afaf5a2dSDavid Somayajulu if ((ctrl_status & CSR_NET_RESET_INTR) == 0) 794afaf5a2dSDavid Somayajulu break; 795afaf5a2dSDavid Somayajulu 796afaf5a2dSDavid Somayajulu msleep(1000); 797afaf5a2dSDavid Somayajulu } while ((--max_wait_time)); 798afaf5a2dSDavid Somayajulu 799afaf5a2dSDavid Somayajulu if ((ctrl_status & CSR_NET_RESET_INTR) != 0) { 800afaf5a2dSDavid Somayajulu DEBUG2(printk(KERN_WARNING 801afaf5a2dSDavid Somayajulu "scsi%ld: Network Reset Intr not cleared by " 802afaf5a2dSDavid Somayajulu "Network function, clearing it now!\n", 803afaf5a2dSDavid Somayajulu ha->host_no)); 804afaf5a2dSDavid Somayajulu spin_lock_irqsave(&ha->hardware_lock, flags); 805afaf5a2dSDavid Somayajulu writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status); 806afaf5a2dSDavid Somayajulu readl(&ha->reg->ctrl_status); 807afaf5a2dSDavid Somayajulu spin_unlock_irqrestore(&ha->hardware_lock, flags); 808afaf5a2dSDavid Somayajulu } 809afaf5a2dSDavid Somayajulu 810afaf5a2dSDavid Somayajulu /* Wait until the firmware tells us the Soft Reset is done */ 811afaf5a2dSDavid Somayajulu max_wait_time = SOFT_RESET_TOV; 812afaf5a2dSDavid Somayajulu do { 813afaf5a2dSDavid Somayajulu spin_lock_irqsave(&ha->hardware_lock, flags); 814afaf5a2dSDavid Somayajulu ctrl_status = readw(&ha->reg->ctrl_status); 815afaf5a2dSDavid Somayajulu spin_unlock_irqrestore(&ha->hardware_lock, flags); 816afaf5a2dSDavid Somayajulu 817afaf5a2dSDavid Somayajulu if ((ctrl_status & CSR_SOFT_RESET) == 0) { 818afaf5a2dSDavid Somayajulu status = QLA_SUCCESS; 819afaf5a2dSDavid Somayajulu break; 820afaf5a2dSDavid Somayajulu } 821afaf5a2dSDavid Somayajulu 822afaf5a2dSDavid Somayajulu msleep(1000); 823afaf5a2dSDavid Somayajulu } while ((--max_wait_time)); 824afaf5a2dSDavid Somayajulu 825afaf5a2dSDavid Somayajulu /* 826afaf5a2dSDavid Somayajulu * Also, make sure that the SCSI Reset Interrupt bit has been cleared 827afaf5a2dSDavid Somayajulu * after the soft reset has taken place. 828afaf5a2dSDavid Somayajulu */ 829afaf5a2dSDavid Somayajulu spin_lock_irqsave(&ha->hardware_lock, flags); 830afaf5a2dSDavid Somayajulu ctrl_status = readw(&ha->reg->ctrl_status); 831afaf5a2dSDavid Somayajulu if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) { 832afaf5a2dSDavid Somayajulu writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); 833afaf5a2dSDavid Somayajulu readl(&ha->reg->ctrl_status); 834afaf5a2dSDavid Somayajulu } 835afaf5a2dSDavid Somayajulu spin_unlock_irqrestore(&ha->hardware_lock, flags); 836afaf5a2dSDavid Somayajulu 837afaf5a2dSDavid Somayajulu /* If soft reset fails then most probably the bios on other 838afaf5a2dSDavid Somayajulu * function is also enabled. 839afaf5a2dSDavid Somayajulu * Since the initialization is sequential the other fn 840afaf5a2dSDavid Somayajulu * wont be able to acknowledge the soft reset. 841afaf5a2dSDavid Somayajulu * Issue a force soft reset to workaround this scenario. 842afaf5a2dSDavid Somayajulu */ 843afaf5a2dSDavid Somayajulu if (max_wait_time == 0) { 844afaf5a2dSDavid Somayajulu /* Issue Force Soft Reset */ 845afaf5a2dSDavid Somayajulu spin_lock_irqsave(&ha->hardware_lock, flags); 846afaf5a2dSDavid Somayajulu writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status); 847afaf5a2dSDavid Somayajulu readl(&ha->reg->ctrl_status); 848afaf5a2dSDavid Somayajulu spin_unlock_irqrestore(&ha->hardware_lock, flags); 849afaf5a2dSDavid Somayajulu /* Wait until the firmware tells us the Soft Reset is done */ 850afaf5a2dSDavid Somayajulu max_wait_time = SOFT_RESET_TOV; 851afaf5a2dSDavid Somayajulu do { 852afaf5a2dSDavid Somayajulu spin_lock_irqsave(&ha->hardware_lock, flags); 853afaf5a2dSDavid Somayajulu ctrl_status = readw(&ha->reg->ctrl_status); 854afaf5a2dSDavid Somayajulu spin_unlock_irqrestore(&ha->hardware_lock, flags); 855afaf5a2dSDavid Somayajulu 856afaf5a2dSDavid Somayajulu if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) { 857afaf5a2dSDavid Somayajulu status = QLA_SUCCESS; 858afaf5a2dSDavid Somayajulu break; 859afaf5a2dSDavid Somayajulu } 860afaf5a2dSDavid Somayajulu 861afaf5a2dSDavid Somayajulu msleep(1000); 862afaf5a2dSDavid Somayajulu } while ((--max_wait_time)); 863afaf5a2dSDavid Somayajulu } 864afaf5a2dSDavid Somayajulu 865afaf5a2dSDavid Somayajulu return status; 866afaf5a2dSDavid Somayajulu } 867afaf5a2dSDavid Somayajulu 868afaf5a2dSDavid Somayajulu /** 869afaf5a2dSDavid Somayajulu * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S. 870afaf5a2dSDavid Somayajulu * @ha: Pointer to host adapter structure. 871afaf5a2dSDavid Somayajulu * 872afaf5a2dSDavid Somayajulu * This routine is called just prior to a HARD RESET to return all 873afaf5a2dSDavid Somayajulu * outstanding commands back to the Operating System. 874afaf5a2dSDavid Somayajulu * Caller should make sure that the following locks are released 875afaf5a2dSDavid Somayajulu * before this calling routine: Hardware lock, and io_request_lock. 876afaf5a2dSDavid Somayajulu **/ 877afaf5a2dSDavid Somayajulu static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha) 878afaf5a2dSDavid Somayajulu { 879afaf5a2dSDavid Somayajulu struct srb *srb; 880afaf5a2dSDavid Somayajulu int i; 881afaf5a2dSDavid Somayajulu unsigned long flags; 882afaf5a2dSDavid Somayajulu 883afaf5a2dSDavid Somayajulu spin_lock_irqsave(&ha->hardware_lock, flags); 884afaf5a2dSDavid Somayajulu for (i = 0; i < ha->host->can_queue; i++) { 885afaf5a2dSDavid Somayajulu srb = qla4xxx_del_from_active_array(ha, i); 886afaf5a2dSDavid Somayajulu if (srb != NULL) { 887afaf5a2dSDavid Somayajulu srb->cmd->result = DID_RESET << 16; 888afaf5a2dSDavid Somayajulu qla4xxx_srb_compl(ha, srb); 889afaf5a2dSDavid Somayajulu } 890afaf5a2dSDavid Somayajulu } 891afaf5a2dSDavid Somayajulu spin_unlock_irqrestore(&ha->hardware_lock, flags); 892afaf5a2dSDavid Somayajulu 893afaf5a2dSDavid Somayajulu } 894afaf5a2dSDavid Somayajulu 895afaf5a2dSDavid Somayajulu /** 896afaf5a2dSDavid Somayajulu * qla4xxx_recover_adapter - recovers adapter after a fatal error 897afaf5a2dSDavid Somayajulu * @ha: Pointer to host adapter structure. 898afaf5a2dSDavid Somayajulu * @renew_ddb_list: Indicates what to do with the adapter's ddb list 89950a29aecSMike Christie * 90050a29aecSMike Christie * renew_ddb_list value can be 0=preserve ddb list, 1=destroy and rebuild 90150a29aecSMike Christie * ddb list. 902afaf5a2dSDavid Somayajulu **/ 903afaf5a2dSDavid Somayajulu static int qla4xxx_recover_adapter(struct scsi_qla_host *ha, 904afaf5a2dSDavid Somayajulu uint8_t renew_ddb_list) 905afaf5a2dSDavid Somayajulu { 906afaf5a2dSDavid Somayajulu int status; 907afaf5a2dSDavid Somayajulu 908afaf5a2dSDavid Somayajulu /* Stall incoming I/O until we are done */ 909afaf5a2dSDavid Somayajulu clear_bit(AF_ONLINE, &ha->flags); 91050a29aecSMike Christie 911afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no, 912afaf5a2dSDavid Somayajulu __func__)); 913afaf5a2dSDavid Somayajulu 914afaf5a2dSDavid Somayajulu /* Wait for outstanding commands to complete. 915afaf5a2dSDavid Somayajulu * Stalls the driver for max 30 secs 916afaf5a2dSDavid Somayajulu */ 917afaf5a2dSDavid Somayajulu status = qla4xxx_cmd_wait(ha); 918afaf5a2dSDavid Somayajulu 919afaf5a2dSDavid Somayajulu qla4xxx_disable_intrs(ha); 920afaf5a2dSDavid Somayajulu 921afaf5a2dSDavid Somayajulu /* Flush any pending ddb changed AENs */ 922afaf5a2dSDavid Somayajulu qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 923afaf5a2dSDavid Somayajulu 924dca05c4cSKaren Higgins qla4xxx_flush_active_srbs(ha); 925dca05c4cSKaren Higgins 926afaf5a2dSDavid Somayajulu /* Reset the firmware. If successful, function 927afaf5a2dSDavid Somayajulu * returns with ISP interrupts enabled. 928afaf5a2dSDavid Somayajulu */ 929afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n", 930afaf5a2dSDavid Somayajulu ha->host_no, __func__)); 931f26b9044SDavid C Somayajulu if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) 932afaf5a2dSDavid Somayajulu status = qla4xxx_soft_reset(ha); 933f26b9044SDavid C Somayajulu else 934f26b9044SDavid C Somayajulu status = QLA_ERROR; 935afaf5a2dSDavid Somayajulu 936afaf5a2dSDavid Somayajulu /* Flush any pending ddb changed AENs */ 937afaf5a2dSDavid Somayajulu qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 938afaf5a2dSDavid Somayajulu 939afaf5a2dSDavid Somayajulu /* Re-initialize firmware. If successful, function returns 940afaf5a2dSDavid Somayajulu * with ISP interrupts enabled */ 941afaf5a2dSDavid Somayajulu if (status == QLA_SUCCESS) { 942afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n", 943afaf5a2dSDavid Somayajulu ha->host_no, __func__)); 944afaf5a2dSDavid Somayajulu 945afaf5a2dSDavid Somayajulu /* If successful, AF_ONLINE flag set in 946afaf5a2dSDavid Somayajulu * qla4xxx_initialize_adapter */ 947afaf5a2dSDavid Somayajulu status = qla4xxx_initialize_adapter(ha, renew_ddb_list); 948afaf5a2dSDavid Somayajulu } 949afaf5a2dSDavid Somayajulu 950afaf5a2dSDavid Somayajulu /* Failed adapter initialization? 951afaf5a2dSDavid Somayajulu * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */ 952afaf5a2dSDavid Somayajulu if ((test_bit(AF_ONLINE, &ha->flags) == 0) && 953afaf5a2dSDavid Somayajulu (test_bit(DPC_RESET_HA, &ha->dpc_flags))) { 954afaf5a2dSDavid Somayajulu /* Adapter initialization failed, see if we can retry 955afaf5a2dSDavid Somayajulu * resetting the ha */ 956afaf5a2dSDavid Somayajulu if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) { 957afaf5a2dSDavid Somayajulu ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES; 958afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: recover adapter - retrying " 959afaf5a2dSDavid Somayajulu "(%d) more times\n", ha->host_no, 960afaf5a2dSDavid Somayajulu ha->retry_reset_ha_cnt)); 961afaf5a2dSDavid Somayajulu set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); 962afaf5a2dSDavid Somayajulu status = QLA_ERROR; 963afaf5a2dSDavid Somayajulu } else { 964afaf5a2dSDavid Somayajulu if (ha->retry_reset_ha_cnt > 0) { 965afaf5a2dSDavid Somayajulu /* Schedule another Reset HA--DPC will retry */ 966afaf5a2dSDavid Somayajulu ha->retry_reset_ha_cnt--; 967afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: recover adapter - " 968afaf5a2dSDavid Somayajulu "retry remaining %d\n", 969afaf5a2dSDavid Somayajulu ha->host_no, 970afaf5a2dSDavid Somayajulu ha->retry_reset_ha_cnt)); 971afaf5a2dSDavid Somayajulu status = QLA_ERROR; 972afaf5a2dSDavid Somayajulu } 973afaf5a2dSDavid Somayajulu 974afaf5a2dSDavid Somayajulu if (ha->retry_reset_ha_cnt == 0) { 975afaf5a2dSDavid Somayajulu /* Recover adapter retries have been exhausted. 976afaf5a2dSDavid Somayajulu * Adapter DEAD */ 977afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: recover adapter " 978afaf5a2dSDavid Somayajulu "failed - board disabled\n", 979afaf5a2dSDavid Somayajulu ha->host_no)); 980afaf5a2dSDavid Somayajulu qla4xxx_flush_active_srbs(ha); 981afaf5a2dSDavid Somayajulu clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); 982afaf5a2dSDavid Somayajulu clear_bit(DPC_RESET_HA, &ha->dpc_flags); 983afaf5a2dSDavid Somayajulu clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, 984afaf5a2dSDavid Somayajulu &ha->dpc_flags); 985afaf5a2dSDavid Somayajulu status = QLA_ERROR; 986afaf5a2dSDavid Somayajulu } 987afaf5a2dSDavid Somayajulu } 988afaf5a2dSDavid Somayajulu } else { 989afaf5a2dSDavid Somayajulu clear_bit(DPC_RESET_HA, &ha->dpc_flags); 990afaf5a2dSDavid Somayajulu clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags); 991afaf5a2dSDavid Somayajulu clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); 992afaf5a2dSDavid Somayajulu } 993afaf5a2dSDavid Somayajulu 994afaf5a2dSDavid Somayajulu ha->adapter_error_count++; 995afaf5a2dSDavid Somayajulu 996afaf5a2dSDavid Somayajulu if (status == QLA_SUCCESS) 997afaf5a2dSDavid Somayajulu qla4xxx_enable_intrs(ha); 998afaf5a2dSDavid Somayajulu 999afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no)); 1000afaf5a2dSDavid Somayajulu return status; 1001afaf5a2dSDavid Somayajulu } 1002afaf5a2dSDavid Somayajulu 1003afaf5a2dSDavid Somayajulu /** 1004afaf5a2dSDavid Somayajulu * qla4xxx_do_dpc - dpc routine 1005afaf5a2dSDavid Somayajulu * @data: in our case pointer to adapter structure 1006afaf5a2dSDavid Somayajulu * 1007afaf5a2dSDavid Somayajulu * This routine is a task that is schedule by the interrupt handler 1008afaf5a2dSDavid Somayajulu * to perform the background processing for interrupts. We put it 1009afaf5a2dSDavid Somayajulu * on a task queue that is consumed whenever the scheduler runs; that's 1010afaf5a2dSDavid Somayajulu * so you can do anything (i.e. put the process to sleep etc). In fact, 1011afaf5a2dSDavid Somayajulu * the mid-level tries to sleep when it reaches the driver threshold 1012afaf5a2dSDavid Somayajulu * "host->can_queue". This can cause a panic if we were in our interrupt code. 1013afaf5a2dSDavid Somayajulu **/ 1014c4028958SDavid Howells static void qla4xxx_do_dpc(struct work_struct *work) 1015afaf5a2dSDavid Somayajulu { 1016c4028958SDavid Howells struct scsi_qla_host *ha = 1017c4028958SDavid Howells container_of(work, struct scsi_qla_host, dpc_work); 1018afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry, *dtemp; 1019477ffb9dSDavid C Somayajulu int status = QLA_ERROR; 1020afaf5a2dSDavid Somayajulu 1021f26b9044SDavid C Somayajulu DEBUG2(printk("scsi%ld: %s: DPC handler waking up." 1022477ffb9dSDavid C Somayajulu "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n", 1023477ffb9dSDavid C Somayajulu ha->host_no, __func__, ha->flags, ha->dpc_flags, 1024477ffb9dSDavid C Somayajulu readw(&ha->reg->ctrl_status))); 1025afaf5a2dSDavid Somayajulu 1026afaf5a2dSDavid Somayajulu /* Initialization not yet finished. Don't do anything yet. */ 1027afaf5a2dSDavid Somayajulu if (!test_bit(AF_INIT_DONE, &ha->flags)) 1028afaf5a2dSDavid Somayajulu return; 1029afaf5a2dSDavid Somayajulu 1030afaf5a2dSDavid Somayajulu if (adapter_up(ha) || 1031afaf5a2dSDavid Somayajulu test_bit(DPC_RESET_HA, &ha->dpc_flags) || 1032afaf5a2dSDavid Somayajulu test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || 1033afaf5a2dSDavid Somayajulu test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) { 1034f26b9044SDavid C Somayajulu if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || 1035f26b9044SDavid C Somayajulu test_bit(DPC_RESET_HA, &ha->dpc_flags)) 1036afaf5a2dSDavid Somayajulu qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST); 1037afaf5a2dSDavid Somayajulu 1038477ffb9dSDavid C Somayajulu if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) { 1039afaf5a2dSDavid Somayajulu uint8_t wait_time = RESET_INTR_TOV; 1040afaf5a2dSDavid Somayajulu 1041afaf5a2dSDavid Somayajulu while ((readw(&ha->reg->ctrl_status) & 1042afaf5a2dSDavid Somayajulu (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) { 1043afaf5a2dSDavid Somayajulu if (--wait_time == 0) 1044afaf5a2dSDavid Somayajulu break; 1045afaf5a2dSDavid Somayajulu msleep(1000); 1046afaf5a2dSDavid Somayajulu } 1047afaf5a2dSDavid Somayajulu if (wait_time == 0) 1048afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld: %s: SR|FSR " 1049afaf5a2dSDavid Somayajulu "bit not cleared-- resetting\n", 1050afaf5a2dSDavid Somayajulu ha->host_no, __func__)); 1051477ffb9dSDavid C Somayajulu qla4xxx_flush_active_srbs(ha); 1052477ffb9dSDavid C Somayajulu if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) { 1053477ffb9dSDavid C Somayajulu qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 1054477ffb9dSDavid C Somayajulu status = qla4xxx_initialize_adapter(ha, 1055477ffb9dSDavid C Somayajulu PRESERVE_DDB_LIST); 1056477ffb9dSDavid C Somayajulu } 1057477ffb9dSDavid C Somayajulu clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 1058477ffb9dSDavid C Somayajulu if (status == QLA_SUCCESS) 1059477ffb9dSDavid C Somayajulu qla4xxx_enable_intrs(ha); 1060afaf5a2dSDavid Somayajulu } 1061afaf5a2dSDavid Somayajulu } 1062afaf5a2dSDavid Somayajulu 1063afaf5a2dSDavid Somayajulu /* ---- process AEN? --- */ 1064afaf5a2dSDavid Somayajulu if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) 1065afaf5a2dSDavid Somayajulu qla4xxx_process_aen(ha, PROCESS_ALL_AENS); 1066afaf5a2dSDavid Somayajulu 1067afaf5a2dSDavid Somayajulu /* ---- Get DHCP IP Address? --- */ 1068afaf5a2dSDavid Somayajulu if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags)) 1069afaf5a2dSDavid Somayajulu qla4xxx_get_dhcp_ip_address(ha); 1070afaf5a2dSDavid Somayajulu 1071afaf5a2dSDavid Somayajulu /* ---- relogin device? --- */ 1072afaf5a2dSDavid Somayajulu if (adapter_up(ha) && 1073afaf5a2dSDavid Somayajulu test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) { 1074afaf5a2dSDavid Somayajulu list_for_each_entry_safe(ddb_entry, dtemp, 1075afaf5a2dSDavid Somayajulu &ha->ddb_list, list) { 1076afaf5a2dSDavid Somayajulu if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) && 1077afaf5a2dSDavid Somayajulu atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) 1078afaf5a2dSDavid Somayajulu qla4xxx_relogin_device(ha, ddb_entry); 1079afaf5a2dSDavid Somayajulu 1080afaf5a2dSDavid Somayajulu /* 1081afaf5a2dSDavid Somayajulu * If mbx cmd times out there is no point 1082afaf5a2dSDavid Somayajulu * in continuing further. 1083afaf5a2dSDavid Somayajulu * With large no of targets this can hang 1084afaf5a2dSDavid Somayajulu * the system. 1085afaf5a2dSDavid Somayajulu */ 1086afaf5a2dSDavid Somayajulu if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) { 1087afaf5a2dSDavid Somayajulu printk(KERN_WARNING "scsi%ld: %s: " 1088afaf5a2dSDavid Somayajulu "need to reset hba\n", 1089afaf5a2dSDavid Somayajulu ha->host_no, __func__); 1090afaf5a2dSDavid Somayajulu break; 1091afaf5a2dSDavid Somayajulu } 1092afaf5a2dSDavid Somayajulu } 1093afaf5a2dSDavid Somayajulu } 1094afaf5a2dSDavid Somayajulu } 1095afaf5a2dSDavid Somayajulu 1096afaf5a2dSDavid Somayajulu /** 1097afaf5a2dSDavid Somayajulu * qla4xxx_free_adapter - release the adapter 1098afaf5a2dSDavid Somayajulu * @ha: pointer to adapter structure 1099afaf5a2dSDavid Somayajulu **/ 1100afaf5a2dSDavid Somayajulu static void qla4xxx_free_adapter(struct scsi_qla_host *ha) 1101afaf5a2dSDavid Somayajulu { 1102afaf5a2dSDavid Somayajulu 1103afaf5a2dSDavid Somayajulu if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) { 1104afaf5a2dSDavid Somayajulu /* Turn-off interrupts on the card. */ 1105afaf5a2dSDavid Somayajulu qla4xxx_disable_intrs(ha); 1106afaf5a2dSDavid Somayajulu } 1107afaf5a2dSDavid Somayajulu 1108afaf5a2dSDavid Somayajulu /* Kill the kernel thread for this host */ 1109afaf5a2dSDavid Somayajulu if (ha->dpc_thread) 1110afaf5a2dSDavid Somayajulu destroy_workqueue(ha->dpc_thread); 1111afaf5a2dSDavid Somayajulu 1112afaf5a2dSDavid Somayajulu /* Issue Soft Reset to put firmware in unknown state */ 1113f26b9044SDavid C Somayajulu if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) 1114477ffb9dSDavid C Somayajulu qla4xxx_hw_reset(ha); 1115afaf5a2dSDavid Somayajulu 1116afaf5a2dSDavid Somayajulu /* Remove timer thread, if present */ 1117afaf5a2dSDavid Somayajulu if (ha->timer_active) 1118afaf5a2dSDavid Somayajulu qla4xxx_stop_timer(ha); 1119afaf5a2dSDavid Somayajulu 1120afaf5a2dSDavid Somayajulu /* Detach interrupts */ 1121afaf5a2dSDavid Somayajulu if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) 1122afaf5a2dSDavid Somayajulu free_irq(ha->pdev->irq, ha); 1123afaf5a2dSDavid Somayajulu 1124bee4fe8eSDavid C Somayajulu /* free extra memory */ 1125bee4fe8eSDavid C Somayajulu qla4xxx_mem_free(ha); 1126bee4fe8eSDavid C Somayajulu 1127afaf5a2dSDavid Somayajulu pci_disable_device(ha->pdev); 1128afaf5a2dSDavid Somayajulu 1129afaf5a2dSDavid Somayajulu } 1130afaf5a2dSDavid Somayajulu 1131afaf5a2dSDavid Somayajulu /*** 1132afaf5a2dSDavid Somayajulu * qla4xxx_iospace_config - maps registers 1133afaf5a2dSDavid Somayajulu * @ha: pointer to adapter structure 1134afaf5a2dSDavid Somayajulu * 1135afaf5a2dSDavid Somayajulu * This routines maps HBA's registers from the pci address space 1136afaf5a2dSDavid Somayajulu * into the kernel virtual address space for memory mapped i/o. 1137afaf5a2dSDavid Somayajulu **/ 1138afaf5a2dSDavid Somayajulu static int qla4xxx_iospace_config(struct scsi_qla_host *ha) 1139afaf5a2dSDavid Somayajulu { 1140afaf5a2dSDavid Somayajulu unsigned long pio, pio_len, pio_flags; 1141afaf5a2dSDavid Somayajulu unsigned long mmio, mmio_len, mmio_flags; 1142afaf5a2dSDavid Somayajulu 1143afaf5a2dSDavid Somayajulu pio = pci_resource_start(ha->pdev, 0); 1144afaf5a2dSDavid Somayajulu pio_len = pci_resource_len(ha->pdev, 0); 1145afaf5a2dSDavid Somayajulu pio_flags = pci_resource_flags(ha->pdev, 0); 1146afaf5a2dSDavid Somayajulu if (pio_flags & IORESOURCE_IO) { 1147afaf5a2dSDavid Somayajulu if (pio_len < MIN_IOBASE_LEN) { 1148afaf5a2dSDavid Somayajulu dev_warn(&ha->pdev->dev, 1149afaf5a2dSDavid Somayajulu "Invalid PCI I/O region size\n"); 1150afaf5a2dSDavid Somayajulu pio = 0; 1151afaf5a2dSDavid Somayajulu } 1152afaf5a2dSDavid Somayajulu } else { 1153afaf5a2dSDavid Somayajulu dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n"); 1154afaf5a2dSDavid Somayajulu pio = 0; 1155afaf5a2dSDavid Somayajulu } 1156afaf5a2dSDavid Somayajulu 1157afaf5a2dSDavid Somayajulu /* Use MMIO operations for all accesses. */ 1158afaf5a2dSDavid Somayajulu mmio = pci_resource_start(ha->pdev, 1); 1159afaf5a2dSDavid Somayajulu mmio_len = pci_resource_len(ha->pdev, 1); 1160afaf5a2dSDavid Somayajulu mmio_flags = pci_resource_flags(ha->pdev, 1); 1161afaf5a2dSDavid Somayajulu 1162afaf5a2dSDavid Somayajulu if (!(mmio_flags & IORESOURCE_MEM)) { 1163afaf5a2dSDavid Somayajulu dev_err(&ha->pdev->dev, 1164afaf5a2dSDavid Somayajulu "region #0 not an MMIO resource, aborting\n"); 1165afaf5a2dSDavid Somayajulu 1166afaf5a2dSDavid Somayajulu goto iospace_error_exit; 1167afaf5a2dSDavid Somayajulu } 1168afaf5a2dSDavid Somayajulu if (mmio_len < MIN_IOBASE_LEN) { 1169afaf5a2dSDavid Somayajulu dev_err(&ha->pdev->dev, 1170afaf5a2dSDavid Somayajulu "Invalid PCI mem region size, aborting\n"); 1171afaf5a2dSDavid Somayajulu goto iospace_error_exit; 1172afaf5a2dSDavid Somayajulu } 1173afaf5a2dSDavid Somayajulu 1174afaf5a2dSDavid Somayajulu if (pci_request_regions(ha->pdev, DRIVER_NAME)) { 1175afaf5a2dSDavid Somayajulu dev_warn(&ha->pdev->dev, 1176afaf5a2dSDavid Somayajulu "Failed to reserve PIO/MMIO regions\n"); 1177afaf5a2dSDavid Somayajulu 1178afaf5a2dSDavid Somayajulu goto iospace_error_exit; 1179afaf5a2dSDavid Somayajulu } 1180afaf5a2dSDavid Somayajulu 1181afaf5a2dSDavid Somayajulu ha->pio_address = pio; 1182afaf5a2dSDavid Somayajulu ha->pio_length = pio_len; 1183afaf5a2dSDavid Somayajulu ha->reg = ioremap(mmio, MIN_IOBASE_LEN); 1184afaf5a2dSDavid Somayajulu if (!ha->reg) { 1185afaf5a2dSDavid Somayajulu dev_err(&ha->pdev->dev, 1186afaf5a2dSDavid Somayajulu "cannot remap MMIO, aborting\n"); 1187afaf5a2dSDavid Somayajulu 1188afaf5a2dSDavid Somayajulu goto iospace_error_exit; 1189afaf5a2dSDavid Somayajulu } 1190afaf5a2dSDavid Somayajulu 1191afaf5a2dSDavid Somayajulu return 0; 1192afaf5a2dSDavid Somayajulu 1193afaf5a2dSDavid Somayajulu iospace_error_exit: 1194afaf5a2dSDavid Somayajulu return -ENOMEM; 1195afaf5a2dSDavid Somayajulu } 1196afaf5a2dSDavid Somayajulu 1197afaf5a2dSDavid Somayajulu /** 1198afaf5a2dSDavid Somayajulu * qla4xxx_probe_adapter - callback function to probe HBA 1199afaf5a2dSDavid Somayajulu * @pdev: pointer to pci_dev structure 1200afaf5a2dSDavid Somayajulu * @pci_device_id: pointer to pci_device entry 1201afaf5a2dSDavid Somayajulu * 1202afaf5a2dSDavid Somayajulu * This routine will probe for Qlogic 4xxx iSCSI host adapters. 1203afaf5a2dSDavid Somayajulu * It returns zero if successful. It also initializes all data necessary for 1204afaf5a2dSDavid Somayajulu * the driver. 1205afaf5a2dSDavid Somayajulu **/ 1206afaf5a2dSDavid Somayajulu static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev, 1207afaf5a2dSDavid Somayajulu const struct pci_device_id *ent) 1208afaf5a2dSDavid Somayajulu { 1209afaf5a2dSDavid Somayajulu int ret = -ENODEV, status; 1210afaf5a2dSDavid Somayajulu struct Scsi_Host *host; 1211afaf5a2dSDavid Somayajulu struct scsi_qla_host *ha; 1212afaf5a2dSDavid Somayajulu uint8_t init_retry_count = 0; 1213afaf5a2dSDavid Somayajulu char buf[34]; 1214afaf5a2dSDavid Somayajulu 1215afaf5a2dSDavid Somayajulu if (pci_enable_device(pdev)) 1216afaf5a2dSDavid Somayajulu return -1; 1217afaf5a2dSDavid Somayajulu 1218afaf5a2dSDavid Somayajulu host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha)); 1219afaf5a2dSDavid Somayajulu if (host == NULL) { 1220afaf5a2dSDavid Somayajulu printk(KERN_WARNING 1221afaf5a2dSDavid Somayajulu "qla4xxx: Couldn't allocate host from scsi layer!\n"); 1222afaf5a2dSDavid Somayajulu goto probe_disable_device; 1223afaf5a2dSDavid Somayajulu } 1224afaf5a2dSDavid Somayajulu 1225afaf5a2dSDavid Somayajulu /* Clear our data area */ 1226afaf5a2dSDavid Somayajulu ha = (struct scsi_qla_host *) host->hostdata; 1227afaf5a2dSDavid Somayajulu memset(ha, 0, sizeof(*ha)); 1228afaf5a2dSDavid Somayajulu 1229afaf5a2dSDavid Somayajulu /* Save the information from PCI BIOS. */ 1230afaf5a2dSDavid Somayajulu ha->pdev = pdev; 1231afaf5a2dSDavid Somayajulu ha->host = host; 1232afaf5a2dSDavid Somayajulu ha->host_no = host->host_no; 1233afaf5a2dSDavid Somayajulu 1234afaf5a2dSDavid Somayajulu /* Configure PCI I/O space. */ 1235afaf5a2dSDavid Somayajulu ret = qla4xxx_iospace_config(ha); 1236afaf5a2dSDavid Somayajulu if (ret) 1237afaf5a2dSDavid Somayajulu goto probe_failed; 1238afaf5a2dSDavid Somayajulu 1239afaf5a2dSDavid Somayajulu dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n", 1240afaf5a2dSDavid Somayajulu pdev->device, pdev->irq, ha->reg); 1241afaf5a2dSDavid Somayajulu 1242afaf5a2dSDavid Somayajulu qla4xxx_config_dma_addressing(ha); 1243afaf5a2dSDavid Somayajulu 1244afaf5a2dSDavid Somayajulu /* Initialize lists and spinlocks. */ 1245afaf5a2dSDavid Somayajulu INIT_LIST_HEAD(&ha->ddb_list); 1246afaf5a2dSDavid Somayajulu INIT_LIST_HEAD(&ha->free_srb_q); 1247afaf5a2dSDavid Somayajulu 1248afaf5a2dSDavid Somayajulu mutex_init(&ha->mbox_sem); 1249afaf5a2dSDavid Somayajulu 1250afaf5a2dSDavid Somayajulu spin_lock_init(&ha->hardware_lock); 1251afaf5a2dSDavid Somayajulu 1252afaf5a2dSDavid Somayajulu /* Allocate dma buffers */ 1253afaf5a2dSDavid Somayajulu if (qla4xxx_mem_alloc(ha)) { 1254afaf5a2dSDavid Somayajulu dev_warn(&ha->pdev->dev, 1255afaf5a2dSDavid Somayajulu "[ERROR] Failed to allocate memory for adapter\n"); 1256afaf5a2dSDavid Somayajulu 1257afaf5a2dSDavid Somayajulu ret = -ENOMEM; 1258afaf5a2dSDavid Somayajulu goto probe_failed; 1259afaf5a2dSDavid Somayajulu } 1260afaf5a2dSDavid Somayajulu 1261afaf5a2dSDavid Somayajulu /* 1262afaf5a2dSDavid Somayajulu * Initialize the Host adapter request/response queues and 1263afaf5a2dSDavid Somayajulu * firmware 1264afaf5a2dSDavid Somayajulu * NOTE: interrupts enabled upon successful completion 1265afaf5a2dSDavid Somayajulu */ 1266afaf5a2dSDavid Somayajulu status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); 1267afaf5a2dSDavid Somayajulu while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) { 1268afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi: %s: retrying adapter initialization " 1269afaf5a2dSDavid Somayajulu "(%d)\n", __func__, init_retry_count)); 1270afaf5a2dSDavid Somayajulu qla4xxx_soft_reset(ha); 1271afaf5a2dSDavid Somayajulu status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); 1272afaf5a2dSDavid Somayajulu } 1273afaf5a2dSDavid Somayajulu if (status == QLA_ERROR) { 1274afaf5a2dSDavid Somayajulu dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n"); 1275afaf5a2dSDavid Somayajulu 1276afaf5a2dSDavid Somayajulu ret = -ENODEV; 1277afaf5a2dSDavid Somayajulu goto probe_failed; 1278afaf5a2dSDavid Somayajulu } 1279afaf5a2dSDavid Somayajulu 1280afaf5a2dSDavid Somayajulu host->cmd_per_lun = 3; 1281afaf5a2dSDavid Somayajulu host->max_channel = 0; 1282afaf5a2dSDavid Somayajulu host->max_lun = MAX_LUNS - 1; 1283afaf5a2dSDavid Somayajulu host->max_id = MAX_TARGETS; 1284afaf5a2dSDavid Somayajulu host->max_cmd_len = IOCB_MAX_CDB_LEN; 1285afaf5a2dSDavid Somayajulu host->can_queue = MAX_SRBS ; 1286afaf5a2dSDavid Somayajulu host->transportt = qla4xxx_scsi_transport; 1287afaf5a2dSDavid Somayajulu 1288afaf5a2dSDavid Somayajulu ret = scsi_init_shared_tag_map(host, MAX_SRBS); 1289afaf5a2dSDavid Somayajulu if (ret) { 1290898eb71cSJoe Perches dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed\n"); 1291afaf5a2dSDavid Somayajulu goto probe_failed; 1292afaf5a2dSDavid Somayajulu } 1293afaf5a2dSDavid Somayajulu 1294afaf5a2dSDavid Somayajulu /* Startup the kernel thread for this host adapter. */ 1295afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi: %s: Starting kernel thread for " 1296afaf5a2dSDavid Somayajulu "qla4xxx_dpc\n", __func__)); 1297afaf5a2dSDavid Somayajulu sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no); 1298afaf5a2dSDavid Somayajulu ha->dpc_thread = create_singlethread_workqueue(buf); 1299afaf5a2dSDavid Somayajulu if (!ha->dpc_thread) { 1300afaf5a2dSDavid Somayajulu dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n"); 1301afaf5a2dSDavid Somayajulu ret = -ENODEV; 1302afaf5a2dSDavid Somayajulu goto probe_failed; 1303afaf5a2dSDavid Somayajulu } 1304c4028958SDavid Howells INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc); 1305afaf5a2dSDavid Somayajulu 1306afaf5a2dSDavid Somayajulu ret = request_irq(pdev->irq, qla4xxx_intr_handler, 130738515e90SThomas Gleixner IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha); 1308afaf5a2dSDavid Somayajulu if (ret) { 1309afaf5a2dSDavid Somayajulu dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d" 1310afaf5a2dSDavid Somayajulu " already in use.\n", pdev->irq); 1311afaf5a2dSDavid Somayajulu goto probe_failed; 1312afaf5a2dSDavid Somayajulu } 1313afaf5a2dSDavid Somayajulu set_bit(AF_IRQ_ATTACHED, &ha->flags); 1314afaf5a2dSDavid Somayajulu host->irq = pdev->irq; 1315afaf5a2dSDavid Somayajulu DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq)); 1316afaf5a2dSDavid Somayajulu 1317afaf5a2dSDavid Somayajulu qla4xxx_enable_intrs(ha); 1318afaf5a2dSDavid Somayajulu 1319afaf5a2dSDavid Somayajulu /* Start timer thread. */ 1320afaf5a2dSDavid Somayajulu qla4xxx_start_timer(ha, qla4xxx_timer, 1); 1321afaf5a2dSDavid Somayajulu 1322afaf5a2dSDavid Somayajulu set_bit(AF_INIT_DONE, &ha->flags); 1323afaf5a2dSDavid Somayajulu 1324afaf5a2dSDavid Somayajulu pci_set_drvdata(pdev, ha); 1325afaf5a2dSDavid Somayajulu 1326afaf5a2dSDavid Somayajulu ret = scsi_add_host(host, &pdev->dev); 1327afaf5a2dSDavid Somayajulu if (ret) 1328afaf5a2dSDavid Somayajulu goto probe_failed; 1329afaf5a2dSDavid Somayajulu 1330afaf5a2dSDavid Somayajulu printk(KERN_INFO 1331afaf5a2dSDavid Somayajulu " QLogic iSCSI HBA Driver version: %s\n" 1332afaf5a2dSDavid Somayajulu " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n", 1333afaf5a2dSDavid Somayajulu qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev), 1334afaf5a2dSDavid Somayajulu ha->host_no, ha->firmware_version[0], ha->firmware_version[1], 1335afaf5a2dSDavid Somayajulu ha->patch_number, ha->build_number); 1336921601b7SMike Christie scsi_scan_host(host); 1337afaf5a2dSDavid Somayajulu return 0; 1338afaf5a2dSDavid Somayajulu 1339afaf5a2dSDavid Somayajulu probe_failed: 1340afaf5a2dSDavid Somayajulu qla4xxx_free_adapter(ha); 1341afaf5a2dSDavid Somayajulu scsi_host_put(ha->host); 1342afaf5a2dSDavid Somayajulu 1343afaf5a2dSDavid Somayajulu probe_disable_device: 1344afaf5a2dSDavid Somayajulu pci_disable_device(pdev); 1345afaf5a2dSDavid Somayajulu 1346afaf5a2dSDavid Somayajulu return ret; 1347afaf5a2dSDavid Somayajulu } 1348afaf5a2dSDavid Somayajulu 1349afaf5a2dSDavid Somayajulu /** 1350afaf5a2dSDavid Somayajulu * qla4xxx_remove_adapter - calback function to remove adapter. 1351afaf5a2dSDavid Somayajulu * @pci_dev: PCI device pointer 1352afaf5a2dSDavid Somayajulu **/ 1353afaf5a2dSDavid Somayajulu static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev) 1354afaf5a2dSDavid Somayajulu { 1355afaf5a2dSDavid Somayajulu struct scsi_qla_host *ha; 1356afaf5a2dSDavid Somayajulu 1357afaf5a2dSDavid Somayajulu ha = pci_get_drvdata(pdev); 1358afaf5a2dSDavid Somayajulu 1359bee4fe8eSDavid C Somayajulu qla4xxx_disable_intrs(ha); 1360bee4fe8eSDavid C Somayajulu 1361bee4fe8eSDavid C Somayajulu while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) 1362bee4fe8eSDavid C Somayajulu ssleep(1); 1363bee4fe8eSDavid C Somayajulu 1364afaf5a2dSDavid Somayajulu /* remove devs from iscsi_sessions to scsi_devices */ 1365afaf5a2dSDavid Somayajulu qla4xxx_free_ddb_list(ha); 1366afaf5a2dSDavid Somayajulu 1367afaf5a2dSDavid Somayajulu scsi_remove_host(ha->host); 1368afaf5a2dSDavid Somayajulu 1369afaf5a2dSDavid Somayajulu qla4xxx_free_adapter(ha); 1370afaf5a2dSDavid Somayajulu 1371afaf5a2dSDavid Somayajulu scsi_host_put(ha->host); 1372afaf5a2dSDavid Somayajulu 1373afaf5a2dSDavid Somayajulu pci_set_drvdata(pdev, NULL); 1374afaf5a2dSDavid Somayajulu } 1375afaf5a2dSDavid Somayajulu 1376afaf5a2dSDavid Somayajulu /** 1377afaf5a2dSDavid Somayajulu * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method. 1378afaf5a2dSDavid Somayajulu * @ha: HA context 1379afaf5a2dSDavid Somayajulu * 1380afaf5a2dSDavid Somayajulu * At exit, the @ha's flags.enable_64bit_addressing set to indicated 1381afaf5a2dSDavid Somayajulu * supported addressing method. 1382afaf5a2dSDavid Somayajulu */ 138347975477SAdrian Bunk static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha) 1384afaf5a2dSDavid Somayajulu { 1385afaf5a2dSDavid Somayajulu int retval; 1386afaf5a2dSDavid Somayajulu 1387afaf5a2dSDavid Somayajulu /* Update our PCI device dma_mask for full 64 bit mask */ 13886a35528aSYang Hongyang if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) { 13896a35528aSYang Hongyang if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) { 1390afaf5a2dSDavid Somayajulu dev_dbg(&ha->pdev->dev, 1391afaf5a2dSDavid Somayajulu "Failed to set 64 bit PCI consistent mask; " 1392afaf5a2dSDavid Somayajulu "using 32 bit.\n"); 1393afaf5a2dSDavid Somayajulu retval = pci_set_consistent_dma_mask(ha->pdev, 1394284901a9SYang Hongyang DMA_BIT_MASK(32)); 1395afaf5a2dSDavid Somayajulu } 1396afaf5a2dSDavid Somayajulu } else 1397284901a9SYang Hongyang retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32)); 1398afaf5a2dSDavid Somayajulu } 1399afaf5a2dSDavid Somayajulu 1400afaf5a2dSDavid Somayajulu static int qla4xxx_slave_alloc(struct scsi_device *sdev) 1401afaf5a2dSDavid Somayajulu { 1402afaf5a2dSDavid Somayajulu struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target); 1403afaf5a2dSDavid Somayajulu struct ddb_entry *ddb = sess->dd_data; 1404afaf5a2dSDavid Somayajulu 1405afaf5a2dSDavid Somayajulu sdev->hostdata = ddb; 1406afaf5a2dSDavid Somayajulu sdev->tagged_supported = 1; 1407d510d965SMike Christie scsi_activate_tcq(sdev, QL4_DEF_QDEPTH); 1408afaf5a2dSDavid Somayajulu return 0; 1409afaf5a2dSDavid Somayajulu } 1410afaf5a2dSDavid Somayajulu 1411afaf5a2dSDavid Somayajulu static int qla4xxx_slave_configure(struct scsi_device *sdev) 1412afaf5a2dSDavid Somayajulu { 1413afaf5a2dSDavid Somayajulu sdev->tagged_supported = 1; 1414afaf5a2dSDavid Somayajulu return 0; 1415afaf5a2dSDavid Somayajulu } 1416afaf5a2dSDavid Somayajulu 1417afaf5a2dSDavid Somayajulu static void qla4xxx_slave_destroy(struct scsi_device *sdev) 1418afaf5a2dSDavid Somayajulu { 1419afaf5a2dSDavid Somayajulu scsi_deactivate_tcq(sdev, 1); 1420afaf5a2dSDavid Somayajulu } 1421afaf5a2dSDavid Somayajulu 1422afaf5a2dSDavid Somayajulu /** 1423afaf5a2dSDavid Somayajulu * qla4xxx_del_from_active_array - returns an active srb 1424afaf5a2dSDavid Somayajulu * @ha: Pointer to host adapter structure. 1425afaf5a2dSDavid Somayajulu * @index: index into to the active_array 1426afaf5a2dSDavid Somayajulu * 1427afaf5a2dSDavid Somayajulu * This routine removes and returns the srb at the specified index 1428afaf5a2dSDavid Somayajulu **/ 1429afaf5a2dSDavid Somayajulu struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index) 1430afaf5a2dSDavid Somayajulu { 1431afaf5a2dSDavid Somayajulu struct srb *srb = NULL; 1432afaf5a2dSDavid Somayajulu struct scsi_cmnd *cmd; 1433afaf5a2dSDavid Somayajulu 1434afaf5a2dSDavid Somayajulu if (!(cmd = scsi_host_find_tag(ha->host, index))) 1435afaf5a2dSDavid Somayajulu return srb; 1436afaf5a2dSDavid Somayajulu 1437afaf5a2dSDavid Somayajulu if (!(srb = (struct srb *)cmd->host_scribble)) 1438afaf5a2dSDavid Somayajulu return srb; 1439afaf5a2dSDavid Somayajulu 1440afaf5a2dSDavid Somayajulu /* update counters */ 1441afaf5a2dSDavid Somayajulu if (srb->flags & SRB_DMA_VALID) { 1442afaf5a2dSDavid Somayajulu ha->req_q_count += srb->iocb_cnt; 1443afaf5a2dSDavid Somayajulu ha->iocb_cnt -= srb->iocb_cnt; 1444afaf5a2dSDavid Somayajulu if (srb->cmd) 1445afaf5a2dSDavid Somayajulu srb->cmd->host_scribble = NULL; 1446afaf5a2dSDavid Somayajulu } 1447afaf5a2dSDavid Somayajulu return srb; 1448afaf5a2dSDavid Somayajulu } 1449afaf5a2dSDavid Somayajulu 1450afaf5a2dSDavid Somayajulu /** 1451afaf5a2dSDavid Somayajulu * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware 1452afaf5a2dSDavid Somayajulu * @ha: actual ha whose done queue will contain the comd returned by firmware. 1453afaf5a2dSDavid Somayajulu * @cmd: Scsi Command to wait on. 1454afaf5a2dSDavid Somayajulu * 1455afaf5a2dSDavid Somayajulu * This routine waits for the command to be returned by the Firmware 1456afaf5a2dSDavid Somayajulu * for some max time. 1457afaf5a2dSDavid Somayajulu **/ 1458afaf5a2dSDavid Somayajulu static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha, 1459afaf5a2dSDavid Somayajulu struct scsi_cmnd *cmd) 1460afaf5a2dSDavid Somayajulu { 1461afaf5a2dSDavid Somayajulu int done = 0; 1462afaf5a2dSDavid Somayajulu struct srb *rp; 1463afaf5a2dSDavid Somayajulu uint32_t max_wait_time = EH_WAIT_CMD_TOV; 1464afaf5a2dSDavid Somayajulu 1465afaf5a2dSDavid Somayajulu do { 1466afaf5a2dSDavid Somayajulu /* Checking to see if its returned to OS */ 1467afaf5a2dSDavid Somayajulu rp = (struct srb *) cmd->SCp.ptr; 1468afaf5a2dSDavid Somayajulu if (rp == NULL) { 1469afaf5a2dSDavid Somayajulu done++; 1470afaf5a2dSDavid Somayajulu break; 1471afaf5a2dSDavid Somayajulu } 1472afaf5a2dSDavid Somayajulu 1473afaf5a2dSDavid Somayajulu msleep(2000); 1474afaf5a2dSDavid Somayajulu } while (max_wait_time--); 1475afaf5a2dSDavid Somayajulu 1476afaf5a2dSDavid Somayajulu return done; 1477afaf5a2dSDavid Somayajulu } 1478afaf5a2dSDavid Somayajulu 1479afaf5a2dSDavid Somayajulu /** 1480afaf5a2dSDavid Somayajulu * qla4xxx_wait_for_hba_online - waits for HBA to come online 1481afaf5a2dSDavid Somayajulu * @ha: Pointer to host adapter structure 1482afaf5a2dSDavid Somayajulu **/ 1483afaf5a2dSDavid Somayajulu static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha) 1484afaf5a2dSDavid Somayajulu { 1485afaf5a2dSDavid Somayajulu unsigned long wait_online; 1486afaf5a2dSDavid Somayajulu 1487afaf5a2dSDavid Somayajulu wait_online = jiffies + (30 * HZ); 1488afaf5a2dSDavid Somayajulu while (time_before(jiffies, wait_online)) { 1489afaf5a2dSDavid Somayajulu 1490afaf5a2dSDavid Somayajulu if (adapter_up(ha)) 1491afaf5a2dSDavid Somayajulu return QLA_SUCCESS; 1492afaf5a2dSDavid Somayajulu else if (ha->retry_reset_ha_cnt == 0) 1493afaf5a2dSDavid Somayajulu return QLA_ERROR; 1494afaf5a2dSDavid Somayajulu 1495afaf5a2dSDavid Somayajulu msleep(2000); 1496afaf5a2dSDavid Somayajulu } 1497afaf5a2dSDavid Somayajulu 1498afaf5a2dSDavid Somayajulu return QLA_ERROR; 1499afaf5a2dSDavid Somayajulu } 1500afaf5a2dSDavid Somayajulu 1501afaf5a2dSDavid Somayajulu /** 1502ce545039SMike Christie * qla4xxx_eh_wait_for_commands - wait for active cmds to finish. 1503afaf5a2dSDavid Somayajulu * @ha: pointer to to HBA 1504afaf5a2dSDavid Somayajulu * @t: target id 1505afaf5a2dSDavid Somayajulu * @l: lun id 1506afaf5a2dSDavid Somayajulu * 1507afaf5a2dSDavid Somayajulu * This function waits for all outstanding commands to a lun to complete. It 1508afaf5a2dSDavid Somayajulu * returns 0 if all pending commands are returned and 1 otherwise. 1509afaf5a2dSDavid Somayajulu **/ 1510ce545039SMike Christie static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha, 1511ce545039SMike Christie struct scsi_target *stgt, 1512ce545039SMike Christie struct scsi_device *sdev) 1513afaf5a2dSDavid Somayajulu { 1514afaf5a2dSDavid Somayajulu int cnt; 1515afaf5a2dSDavid Somayajulu int status = 0; 1516afaf5a2dSDavid Somayajulu struct scsi_cmnd *cmd; 1517afaf5a2dSDavid Somayajulu 1518afaf5a2dSDavid Somayajulu /* 1519ce545039SMike Christie * Waiting for all commands for the designated target or dev 1520ce545039SMike Christie * in the active array 1521afaf5a2dSDavid Somayajulu */ 1522afaf5a2dSDavid Somayajulu for (cnt = 0; cnt < ha->host->can_queue; cnt++) { 1523afaf5a2dSDavid Somayajulu cmd = scsi_host_find_tag(ha->host, cnt); 1524ce545039SMike Christie if (cmd && stgt == scsi_target(cmd->device) && 1525ce545039SMike Christie (!sdev || sdev == cmd->device)) { 1526afaf5a2dSDavid Somayajulu if (!qla4xxx_eh_wait_on_command(ha, cmd)) { 1527afaf5a2dSDavid Somayajulu status++; 1528afaf5a2dSDavid Somayajulu break; 1529afaf5a2dSDavid Somayajulu } 1530afaf5a2dSDavid Somayajulu } 1531afaf5a2dSDavid Somayajulu } 1532afaf5a2dSDavid Somayajulu return status; 1533afaf5a2dSDavid Somayajulu } 1534afaf5a2dSDavid Somayajulu 1535afaf5a2dSDavid Somayajulu /** 1536afaf5a2dSDavid Somayajulu * qla4xxx_eh_device_reset - callback for target reset. 1537afaf5a2dSDavid Somayajulu * @cmd: Pointer to Linux's SCSI command structure 1538afaf5a2dSDavid Somayajulu * 1539afaf5a2dSDavid Somayajulu * This routine is called by the Linux OS to reset all luns on the 1540afaf5a2dSDavid Somayajulu * specified target. 1541afaf5a2dSDavid Somayajulu **/ 1542afaf5a2dSDavid Somayajulu static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd) 1543afaf5a2dSDavid Somayajulu { 1544afaf5a2dSDavid Somayajulu struct scsi_qla_host *ha = to_qla_host(cmd->device->host); 1545afaf5a2dSDavid Somayajulu struct ddb_entry *ddb_entry = cmd->device->hostdata; 1546afaf5a2dSDavid Somayajulu int ret = FAILED, stat; 1547afaf5a2dSDavid Somayajulu 1548612f7348SKaren Higgins if (!ddb_entry) 1549afaf5a2dSDavid Somayajulu return ret; 1550afaf5a2dSDavid Somayajulu 1551afaf5a2dSDavid Somayajulu dev_info(&ha->pdev->dev, 1552afaf5a2dSDavid Somayajulu "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no, 1553afaf5a2dSDavid Somayajulu cmd->device->channel, cmd->device->id, cmd->device->lun); 1554afaf5a2dSDavid Somayajulu 1555afaf5a2dSDavid Somayajulu DEBUG2(printk(KERN_INFO 1556afaf5a2dSDavid Somayajulu "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x," 1557afaf5a2dSDavid Somayajulu "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no, 1558242f9dcbSJens Axboe cmd, jiffies, cmd->request->timeout / HZ, 1559afaf5a2dSDavid Somayajulu ha->dpc_flags, cmd->result, cmd->allowed)); 1560afaf5a2dSDavid Somayajulu 1561afaf5a2dSDavid Somayajulu /* FIXME: wait for hba to go online */ 1562afaf5a2dSDavid Somayajulu stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun); 1563afaf5a2dSDavid Somayajulu if (stat != QLA_SUCCESS) { 1564afaf5a2dSDavid Somayajulu dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat); 1565afaf5a2dSDavid Somayajulu goto eh_dev_reset_done; 1566afaf5a2dSDavid Somayajulu } 1567afaf5a2dSDavid Somayajulu 1568ce545039SMike Christie if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device), 1569ce545039SMike Christie cmd->device)) { 1570afaf5a2dSDavid Somayajulu dev_info(&ha->pdev->dev, 1571afaf5a2dSDavid Somayajulu "DEVICE RESET FAILED - waiting for " 1572afaf5a2dSDavid Somayajulu "commands.\n"); 1573afaf5a2dSDavid Somayajulu goto eh_dev_reset_done; 1574afaf5a2dSDavid Somayajulu } 1575afaf5a2dSDavid Somayajulu 15769d562913SDavid C Somayajulu /* Send marker. */ 15779d562913SDavid C Somayajulu if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun, 15789d562913SDavid C Somayajulu MM_LUN_RESET) != QLA_SUCCESS) 15799d562913SDavid C Somayajulu goto eh_dev_reset_done; 15809d562913SDavid C Somayajulu 1581afaf5a2dSDavid Somayajulu dev_info(&ha->pdev->dev, 1582afaf5a2dSDavid Somayajulu "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n", 1583afaf5a2dSDavid Somayajulu ha->host_no, cmd->device->channel, cmd->device->id, 1584afaf5a2dSDavid Somayajulu cmd->device->lun); 1585afaf5a2dSDavid Somayajulu 1586afaf5a2dSDavid Somayajulu ret = SUCCESS; 1587afaf5a2dSDavid Somayajulu 1588afaf5a2dSDavid Somayajulu eh_dev_reset_done: 1589afaf5a2dSDavid Somayajulu 1590afaf5a2dSDavid Somayajulu return ret; 1591afaf5a2dSDavid Somayajulu } 1592afaf5a2dSDavid Somayajulu 1593afaf5a2dSDavid Somayajulu /** 1594ce545039SMike Christie * qla4xxx_eh_target_reset - callback for target reset. 1595ce545039SMike Christie * @cmd: Pointer to Linux's SCSI command structure 1596ce545039SMike Christie * 1597ce545039SMike Christie * This routine is called by the Linux OS to reset the target. 1598ce545039SMike Christie **/ 1599ce545039SMike Christie static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd) 1600ce545039SMike Christie { 1601ce545039SMike Christie struct scsi_qla_host *ha = to_qla_host(cmd->device->host); 1602ce545039SMike Christie struct ddb_entry *ddb_entry = cmd->device->hostdata; 1603ce545039SMike Christie int stat; 1604ce545039SMike Christie 1605ce545039SMike Christie if (!ddb_entry) 1606ce545039SMike Christie return FAILED; 1607ce545039SMike Christie 1608ce545039SMike Christie starget_printk(KERN_INFO, scsi_target(cmd->device), 1609ce545039SMike Christie "WARM TARGET RESET ISSUED.\n"); 1610ce545039SMike Christie 1611ce545039SMike Christie DEBUG2(printk(KERN_INFO 1612ce545039SMike Christie "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, " 1613ce545039SMike Christie "to=%x,dpc_flags=%lx, status=%x allowed=%d\n", 1614242f9dcbSJens Axboe ha->host_no, cmd, jiffies, cmd->request->timeout / HZ, 1615ce545039SMike Christie ha->dpc_flags, cmd->result, cmd->allowed)); 1616ce545039SMike Christie 1617ce545039SMike Christie stat = qla4xxx_reset_target(ha, ddb_entry); 1618ce545039SMike Christie if (stat != QLA_SUCCESS) { 1619ce545039SMike Christie starget_printk(KERN_INFO, scsi_target(cmd->device), 1620ce545039SMike Christie "WARM TARGET RESET FAILED.\n"); 1621ce545039SMike Christie return FAILED; 1622ce545039SMike Christie } 1623ce545039SMike Christie 1624ce545039SMike Christie if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device), 1625ce545039SMike Christie NULL)) { 1626ce545039SMike Christie starget_printk(KERN_INFO, scsi_target(cmd->device), 1627ce545039SMike Christie "WARM TARGET DEVICE RESET FAILED - " 1628ce545039SMike Christie "waiting for commands.\n"); 1629ce545039SMike Christie return FAILED; 1630ce545039SMike Christie } 1631ce545039SMike Christie 16329d562913SDavid C Somayajulu /* Send marker. */ 16339d562913SDavid C Somayajulu if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun, 16349d562913SDavid C Somayajulu MM_TGT_WARM_RESET) != QLA_SUCCESS) { 16359d562913SDavid C Somayajulu starget_printk(KERN_INFO, scsi_target(cmd->device), 16369d562913SDavid C Somayajulu "WARM TARGET DEVICE RESET FAILED - " 16379d562913SDavid C Somayajulu "marker iocb failed.\n"); 16389d562913SDavid C Somayajulu return FAILED; 16399d562913SDavid C Somayajulu } 16409d562913SDavid C Somayajulu 1641ce545039SMike Christie starget_printk(KERN_INFO, scsi_target(cmd->device), 1642ce545039SMike Christie "WARM TARGET RESET SUCCEEDED.\n"); 1643ce545039SMike Christie return SUCCESS; 1644ce545039SMike Christie } 1645ce545039SMike Christie 1646ce545039SMike Christie /** 1647afaf5a2dSDavid Somayajulu * qla4xxx_eh_host_reset - kernel callback 1648afaf5a2dSDavid Somayajulu * @cmd: Pointer to Linux's SCSI command structure 1649afaf5a2dSDavid Somayajulu * 1650afaf5a2dSDavid Somayajulu * This routine is invoked by the Linux kernel to perform fatal error 1651afaf5a2dSDavid Somayajulu * recovery on the specified adapter. 1652afaf5a2dSDavid Somayajulu **/ 1653afaf5a2dSDavid Somayajulu static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd) 1654afaf5a2dSDavid Somayajulu { 1655afaf5a2dSDavid Somayajulu int return_status = FAILED; 1656afaf5a2dSDavid Somayajulu struct scsi_qla_host *ha; 1657afaf5a2dSDavid Somayajulu 1658afaf5a2dSDavid Somayajulu ha = (struct scsi_qla_host *) cmd->device->host->hostdata; 1659afaf5a2dSDavid Somayajulu 1660afaf5a2dSDavid Somayajulu dev_info(&ha->pdev->dev, 1661dca05c4cSKaren Higgins "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no, 1662afaf5a2dSDavid Somayajulu cmd->device->channel, cmd->device->id, cmd->device->lun); 1663afaf5a2dSDavid Somayajulu 1664afaf5a2dSDavid Somayajulu if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) { 1665afaf5a2dSDavid Somayajulu DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter " 1666afaf5a2dSDavid Somayajulu "DEAD.\n", ha->host_no, cmd->device->channel, 1667afaf5a2dSDavid Somayajulu __func__)); 1668afaf5a2dSDavid Somayajulu 1669afaf5a2dSDavid Somayajulu return FAILED; 1670afaf5a2dSDavid Somayajulu } 1671afaf5a2dSDavid Somayajulu 167250a29aecSMike Christie /* make sure the dpc thread is stopped while we reset the hba */ 167350a29aecSMike Christie clear_bit(AF_ONLINE, &ha->flags); 167450a29aecSMike Christie flush_workqueue(ha->dpc_thread); 167550a29aecSMike Christie 167650a29aecSMike Christie if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) 1677afaf5a2dSDavid Somayajulu return_status = SUCCESS; 1678afaf5a2dSDavid Somayajulu 1679afaf5a2dSDavid Somayajulu dev_info(&ha->pdev->dev, "HOST RESET %s.\n", 1680afaf5a2dSDavid Somayajulu return_status == FAILED ? "FAILED" : "SUCCEDED"); 1681afaf5a2dSDavid Somayajulu 1682afaf5a2dSDavid Somayajulu return return_status; 1683afaf5a2dSDavid Somayajulu } 1684afaf5a2dSDavid Somayajulu 1685afaf5a2dSDavid Somayajulu 1686afaf5a2dSDavid Somayajulu static struct pci_device_id qla4xxx_pci_tbl[] = { 1687afaf5a2dSDavid Somayajulu { 1688afaf5a2dSDavid Somayajulu .vendor = PCI_VENDOR_ID_QLOGIC, 1689afaf5a2dSDavid Somayajulu .device = PCI_DEVICE_ID_QLOGIC_ISP4010, 1690afaf5a2dSDavid Somayajulu .subvendor = PCI_ANY_ID, 1691afaf5a2dSDavid Somayajulu .subdevice = PCI_ANY_ID, 1692afaf5a2dSDavid Somayajulu }, 1693afaf5a2dSDavid Somayajulu { 1694afaf5a2dSDavid Somayajulu .vendor = PCI_VENDOR_ID_QLOGIC, 1695afaf5a2dSDavid Somayajulu .device = PCI_DEVICE_ID_QLOGIC_ISP4022, 1696afaf5a2dSDavid Somayajulu .subvendor = PCI_ANY_ID, 1697afaf5a2dSDavid Somayajulu .subdevice = PCI_ANY_ID, 1698afaf5a2dSDavid Somayajulu }, 1699d915058fSDavid C Somayajulu { 1700d915058fSDavid C Somayajulu .vendor = PCI_VENDOR_ID_QLOGIC, 1701d915058fSDavid C Somayajulu .device = PCI_DEVICE_ID_QLOGIC_ISP4032, 1702d915058fSDavid C Somayajulu .subvendor = PCI_ANY_ID, 1703d915058fSDavid C Somayajulu .subdevice = PCI_ANY_ID, 1704d915058fSDavid C Somayajulu }, 1705afaf5a2dSDavid Somayajulu {0, 0}, 1706afaf5a2dSDavid Somayajulu }; 1707afaf5a2dSDavid Somayajulu MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl); 1708afaf5a2dSDavid Somayajulu 170947975477SAdrian Bunk static struct pci_driver qla4xxx_pci_driver = { 1710afaf5a2dSDavid Somayajulu .name = DRIVER_NAME, 1711afaf5a2dSDavid Somayajulu .id_table = qla4xxx_pci_tbl, 1712afaf5a2dSDavid Somayajulu .probe = qla4xxx_probe_adapter, 1713afaf5a2dSDavid Somayajulu .remove = qla4xxx_remove_adapter, 1714afaf5a2dSDavid Somayajulu }; 1715afaf5a2dSDavid Somayajulu 1716afaf5a2dSDavid Somayajulu static int __init qla4xxx_module_init(void) 1717afaf5a2dSDavid Somayajulu { 1718afaf5a2dSDavid Somayajulu int ret; 1719afaf5a2dSDavid Somayajulu 1720afaf5a2dSDavid Somayajulu /* Allocate cache for SRBs. */ 1721afaf5a2dSDavid Somayajulu srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0, 172220c2df83SPaul Mundt SLAB_HWCACHE_ALIGN, NULL); 1723afaf5a2dSDavid Somayajulu if (srb_cachep == NULL) { 1724afaf5a2dSDavid Somayajulu printk(KERN_ERR 1725afaf5a2dSDavid Somayajulu "%s: Unable to allocate SRB cache..." 1726afaf5a2dSDavid Somayajulu "Failing load!\n", DRIVER_NAME); 1727afaf5a2dSDavid Somayajulu ret = -ENOMEM; 1728afaf5a2dSDavid Somayajulu goto no_srp_cache; 1729afaf5a2dSDavid Somayajulu } 1730afaf5a2dSDavid Somayajulu 1731afaf5a2dSDavid Somayajulu /* Derive version string. */ 1732afaf5a2dSDavid Somayajulu strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION); 173311010fecSAndrew Vasquez if (ql4xextended_error_logging) 1734afaf5a2dSDavid Somayajulu strcat(qla4xxx_version_str, "-debug"); 1735afaf5a2dSDavid Somayajulu 1736afaf5a2dSDavid Somayajulu qla4xxx_scsi_transport = 1737afaf5a2dSDavid Somayajulu iscsi_register_transport(&qla4xxx_iscsi_transport); 1738afaf5a2dSDavid Somayajulu if (!qla4xxx_scsi_transport){ 1739afaf5a2dSDavid Somayajulu ret = -ENODEV; 1740afaf5a2dSDavid Somayajulu goto release_srb_cache; 1741afaf5a2dSDavid Somayajulu } 1742afaf5a2dSDavid Somayajulu 1743afaf5a2dSDavid Somayajulu ret = pci_register_driver(&qla4xxx_pci_driver); 1744afaf5a2dSDavid Somayajulu if (ret) 1745afaf5a2dSDavid Somayajulu goto unregister_transport; 1746afaf5a2dSDavid Somayajulu 1747afaf5a2dSDavid Somayajulu printk(KERN_INFO "QLogic iSCSI HBA Driver\n"); 1748afaf5a2dSDavid Somayajulu return 0; 17495ae16db3SDoug Maxey 1750afaf5a2dSDavid Somayajulu unregister_transport: 1751afaf5a2dSDavid Somayajulu iscsi_unregister_transport(&qla4xxx_iscsi_transport); 1752afaf5a2dSDavid Somayajulu release_srb_cache: 1753afaf5a2dSDavid Somayajulu kmem_cache_destroy(srb_cachep); 1754afaf5a2dSDavid Somayajulu no_srp_cache: 1755afaf5a2dSDavid Somayajulu return ret; 1756afaf5a2dSDavid Somayajulu } 1757afaf5a2dSDavid Somayajulu 1758afaf5a2dSDavid Somayajulu static void __exit qla4xxx_module_exit(void) 1759afaf5a2dSDavid Somayajulu { 1760477ffb9dSDavid C Somayajulu ql4_mod_unload = 1; 1761afaf5a2dSDavid Somayajulu pci_unregister_driver(&qla4xxx_pci_driver); 1762afaf5a2dSDavid Somayajulu iscsi_unregister_transport(&qla4xxx_iscsi_transport); 1763afaf5a2dSDavid Somayajulu kmem_cache_destroy(srb_cachep); 1764afaf5a2dSDavid Somayajulu } 1765afaf5a2dSDavid Somayajulu 1766afaf5a2dSDavid Somayajulu module_init(qla4xxx_module_init); 1767afaf5a2dSDavid Somayajulu module_exit(qla4xxx_module_exit); 1768afaf5a2dSDavid Somayajulu 1769afaf5a2dSDavid Somayajulu MODULE_AUTHOR("QLogic Corporation"); 1770afaf5a2dSDavid Somayajulu MODULE_DESCRIPTION("QLogic iSCSI HBA Driver"); 1771afaf5a2dSDavid Somayajulu MODULE_LICENSE("GPL"); 1772afaf5a2dSDavid Somayajulu MODULE_VERSION(QLA4XXX_DRIVER_VERSION); 1773