David Somayajulu | afaf5a2 | 2006-09-19 10:28:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * QLogic iSCSI HBA Driver |
| 3 | * Copyright (c) 2003-2006 QLogic Corporation |
| 4 | * |
| 5 | * See LICENSE.qla4xxx for copyright and licensing details. |
| 6 | */ |
| 7 | |
| 8 | #include "ql4_def.h" |
| 9 | |
| 10 | /** |
| 11 | * qla2x00_process_completed_request() - Process a Fast Post response. |
| 12 | * @ha: SCSI driver HA context |
| 13 | * @index: SRB index |
| 14 | **/ |
| 15 | static void qla4xxx_process_completed_request(struct scsi_qla_host *ha, |
| 16 | uint32_t index) |
| 17 | { |
| 18 | struct srb *srb; |
| 19 | |
| 20 | srb = qla4xxx_del_from_active_array(ha, index); |
| 21 | if (srb) { |
| 22 | /* Save ISP completion status */ |
| 23 | srb->cmd->result = DID_OK << 16; |
| 24 | qla4xxx_srb_compl(ha, srb); |
| 25 | } else { |
| 26 | DEBUG2(printk("scsi%ld: Invalid ISP SCSI completion handle = " |
| 27 | "%d\n", ha->host_no, index)); |
| 28 | set_bit(DPC_RESET_HA, &ha->dpc_flags); |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | /** |
| 33 | * qla4xxx_status_entry - processes status IOCBs |
| 34 | * @ha: Pointer to host adapter structure. |
| 35 | * @sts_entry: Pointer to status entry structure. |
| 36 | **/ |
| 37 | static void qla4xxx_status_entry(struct scsi_qla_host *ha, |
| 38 | struct status_entry *sts_entry) |
| 39 | { |
| 40 | uint8_t scsi_status; |
| 41 | struct scsi_cmnd *cmd; |
| 42 | struct srb *srb; |
| 43 | struct ddb_entry *ddb_entry; |
| 44 | uint32_t residual; |
| 45 | uint16_t sensebytecnt; |
| 46 | |
| 47 | if (sts_entry->completionStatus == SCS_COMPLETE && |
| 48 | sts_entry->scsiStatus == 0) { |
| 49 | qla4xxx_process_completed_request(ha, |
| 50 | le32_to_cpu(sts_entry-> |
| 51 | handle)); |
| 52 | return; |
| 53 | } |
| 54 | |
| 55 | srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle)); |
| 56 | if (!srb) { |
| 57 | /* FIXMEdg: Don't we need to reset ISP in this case??? */ |
| 58 | DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid " |
| 59 | "handle 0x%x, sp=%p. This cmd may have already " |
| 60 | "been completed.\n", ha->host_no, __func__, |
| 61 | le32_to_cpu(sts_entry->handle), srb)); |
| 62 | return; |
| 63 | } |
| 64 | |
| 65 | cmd = srb->cmd; |
| 66 | if (cmd == NULL) { |
| 67 | DEBUG2(printk("scsi%ld: %s: Command already returned back to " |
| 68 | "OS pkt->handle=%d srb=%p srb->state:%d\n", |
| 69 | ha->host_no, __func__, sts_entry->handle, |
| 70 | srb, srb->state)); |
| 71 | dev_warn(&ha->pdev->dev, "Command is NULL:" |
| 72 | " already returned to OS (srb=%p)\n", srb); |
| 73 | return; |
| 74 | } |
| 75 | |
| 76 | ddb_entry = srb->ddb; |
| 77 | if (ddb_entry == NULL) { |
| 78 | cmd->result = DID_NO_CONNECT << 16; |
| 79 | goto status_entry_exit; |
| 80 | } |
| 81 | |
| 82 | residual = le32_to_cpu(sts_entry->residualByteCnt); |
| 83 | |
| 84 | /* Translate ISP error to a Linux SCSI error. */ |
| 85 | scsi_status = sts_entry->scsiStatus; |
| 86 | switch (sts_entry->completionStatus) { |
| 87 | case SCS_COMPLETE: |
| 88 | if (scsi_status == 0) { |
| 89 | cmd->result = DID_OK << 16; |
| 90 | break; |
| 91 | } |
| 92 | |
| 93 | if (sts_entry->iscsiFlags & |
| 94 | (ISCSI_FLAG_RESIDUAL_OVER|ISCSI_FLAG_RESIDUAL_UNDER)) |
| 95 | cmd->resid = residual; |
| 96 | |
| 97 | cmd->result = DID_OK << 16 | scsi_status; |
| 98 | |
| 99 | if (scsi_status != SCSI_CHECK_CONDITION) |
| 100 | break; |
| 101 | |
| 102 | /* Copy Sense Data into sense buffer. */ |
| 103 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); |
| 104 | |
| 105 | sensebytecnt = le16_to_cpu(sts_entry->senseDataByteCnt); |
| 106 | if (sensebytecnt == 0) |
| 107 | break; |
| 108 | |
| 109 | memcpy(cmd->sense_buffer, sts_entry->senseData, |
| 110 | min(sensebytecnt, |
| 111 | (uint16_t) sizeof(cmd->sense_buffer))); |
| 112 | |
| 113 | DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, " |
| 114 | "ASC/ASCQ = %02x/%02x\n", ha->host_no, |
| 115 | cmd->device->channel, cmd->device->id, |
| 116 | cmd->device->lun, __func__, |
| 117 | sts_entry->senseData[2] & 0x0f, |
| 118 | sts_entry->senseData[12], |
| 119 | sts_entry->senseData[13])); |
| 120 | |
| 121 | srb->flags |= SRB_GOT_SENSE; |
| 122 | break; |
| 123 | |
| 124 | case SCS_INCOMPLETE: |
| 125 | /* Always set the status to DID_ERROR, since |
| 126 | * all conditions result in that status anyway */ |
| 127 | cmd->result = DID_ERROR << 16; |
| 128 | break; |
| 129 | |
| 130 | case SCS_RESET_OCCURRED: |
| 131 | DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n", |
| 132 | ha->host_no, cmd->device->channel, |
| 133 | cmd->device->id, cmd->device->lun, __func__)); |
| 134 | |
| 135 | cmd->result = DID_RESET << 16; |
| 136 | break; |
| 137 | |
| 138 | case SCS_ABORTED: |
| 139 | DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n", |
| 140 | ha->host_no, cmd->device->channel, |
| 141 | cmd->device->id, cmd->device->lun, __func__)); |
| 142 | |
| 143 | cmd->result = DID_RESET << 16; |
| 144 | break; |
| 145 | |
| 146 | case SCS_TIMEOUT: |
| 147 | DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n", |
| 148 | ha->host_no, cmd->device->channel, |
| 149 | cmd->device->id, cmd->device->lun)); |
| 150 | |
| 151 | cmd->result = DID_BUS_BUSY << 16; |
| 152 | |
| 153 | /* |
| 154 | * Mark device missing so that we won't continue to send |
| 155 | * I/O to this device. We should get a ddb state change |
| 156 | * AEN soon. |
| 157 | */ |
| 158 | if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE) |
| 159 | qla4xxx_mark_device_missing(ha, ddb_entry); |
| 160 | break; |
| 161 | |
| 162 | case SCS_DATA_UNDERRUN: |
| 163 | case SCS_DATA_OVERRUN: |
| 164 | if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) { |
| 165 | DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun, " |
| 166 | "residual = 0x%x\n", ha->host_no, |
| 167 | cmd->device->channel, cmd->device->id, |
| 168 | cmd->device->lun, __func__, residual)); |
| 169 | |
| 170 | cmd->result = DID_ERROR << 16; |
| 171 | break; |
| 172 | } |
| 173 | |
| 174 | if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) == 0) { |
| 175 | /* |
| 176 | * Firmware detected a SCSI transport underrun |
| 177 | * condition |
| 178 | */ |
| 179 | cmd->resid = residual; |
| 180 | DEBUG2(printk("scsi%ld:%d:%d:%d: %s: UNDERRUN status " |
| 181 | "detected, xferlen = 0x%x, residual = " |
| 182 | "0x%x\n", |
| 183 | ha->host_no, cmd->device->channel, |
| 184 | cmd->device->id, |
| 185 | cmd->device->lun, __func__, |
| 186 | cmd->request_bufflen, |
| 187 | residual)); |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * If there is scsi_status, it takes precedense over |
| 192 | * underflow condition. |
| 193 | */ |
| 194 | if (scsi_status != 0) { |
| 195 | cmd->result = DID_OK << 16 | scsi_status; |
| 196 | |
| 197 | if (scsi_status != SCSI_CHECK_CONDITION) |
| 198 | break; |
| 199 | |
| 200 | /* Copy Sense Data into sense buffer. */ |
| 201 | memset(cmd->sense_buffer, 0, |
| 202 | sizeof(cmd->sense_buffer)); |
| 203 | |
| 204 | sensebytecnt = |
| 205 | le16_to_cpu(sts_entry->senseDataByteCnt); |
| 206 | if (sensebytecnt == 0) |
| 207 | break; |
| 208 | |
| 209 | memcpy(cmd->sense_buffer, sts_entry->senseData, |
| 210 | min(sensebytecnt, |
| 211 | (uint16_t) sizeof(cmd->sense_buffer))); |
| 212 | |
| 213 | DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, " |
| 214 | "ASC/ASCQ = %02x/%02x\n", ha->host_no, |
| 215 | cmd->device->channel, cmd->device->id, |
| 216 | cmd->device->lun, __func__, |
| 217 | sts_entry->senseData[2] & 0x0f, |
| 218 | sts_entry->senseData[12], |
| 219 | sts_entry->senseData[13])); |
| 220 | } else { |
| 221 | /* |
| 222 | * If RISC reports underrun and target does not |
| 223 | * report it then we must have a lost frame, so |
| 224 | * tell upper layer to retry it by reporting a |
| 225 | * bus busy. |
| 226 | */ |
| 227 | if ((sts_entry->iscsiFlags & |
| 228 | ISCSI_FLAG_RESIDUAL_UNDER) == 0) { |
| 229 | cmd->result = DID_BUS_BUSY << 16; |
| 230 | } else if ((cmd->request_bufflen - residual) < |
| 231 | cmd->underflow) { |
| 232 | /* |
| 233 | * Handle mid-layer underflow??? |
| 234 | * |
| 235 | * For kernels less than 2.4, the driver must |
| 236 | * return an error if an underflow is detected. |
| 237 | * For kernels equal-to and above 2.4, the |
| 238 | * mid-layer will appearantly handle the |
| 239 | * underflow by detecting the residual count -- |
| 240 | * unfortunately, we do not see where this is |
| 241 | * actually being done. In the interim, we |
| 242 | * will return DID_ERROR. |
| 243 | */ |
| 244 | DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " |
| 245 | "Mid-layer Data underrun, " |
| 246 | "xferlen = 0x%x, " |
| 247 | "residual = 0x%x\n", ha->host_no, |
| 248 | cmd->device->channel, |
| 249 | cmd->device->id, |
| 250 | cmd->device->lun, __func__, |
| 251 | cmd->request_bufflen, residual)); |
| 252 | |
| 253 | cmd->result = DID_ERROR << 16; |
| 254 | } else { |
| 255 | cmd->result = DID_OK << 16; |
| 256 | } |
| 257 | } |
| 258 | break; |
| 259 | |
| 260 | case SCS_DEVICE_LOGGED_OUT: |
| 261 | case SCS_DEVICE_UNAVAILABLE: |
| 262 | /* |
| 263 | * Mark device missing so that we won't continue to |
| 264 | * send I/O to this device. We should get a ddb |
| 265 | * state change AEN soon. |
| 266 | */ |
| 267 | if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE) |
| 268 | qla4xxx_mark_device_missing(ha, ddb_entry); |
| 269 | |
| 270 | cmd->result = DID_BUS_BUSY << 16; |
| 271 | break; |
| 272 | |
| 273 | case SCS_QUEUE_FULL: |
| 274 | /* |
| 275 | * SCSI Mid-Layer handles device queue full |
| 276 | */ |
| 277 | cmd->result = DID_OK << 16 | sts_entry->scsiStatus; |
| 278 | DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected " |
| 279 | "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x," |
| 280 | " iResp=%02x\n", ha->host_no, cmd->device->id, |
| 281 | cmd->device->lun, __func__, |
| 282 | sts_entry->completionStatus, |
| 283 | sts_entry->scsiStatus, sts_entry->state_flags, |
| 284 | sts_entry->iscsiFlags, |
| 285 | sts_entry->iscsiResponse)); |
| 286 | break; |
| 287 | |
| 288 | default: |
| 289 | cmd->result = DID_ERROR << 16; |
| 290 | break; |
| 291 | } |
| 292 | |
| 293 | status_entry_exit: |
| 294 | |
| 295 | /* complete the request */ |
| 296 | srb->cc_stat = sts_entry->completionStatus; |
| 297 | qla4xxx_srb_compl(ha, srb); |
| 298 | } |
| 299 | |
| 300 | /** |
| 301 | * qla4xxx_process_response_queue - process response queue completions |
| 302 | * @ha: Pointer to host adapter structure. |
| 303 | * |
| 304 | * This routine process response queue completions in interrupt context. |
| 305 | * Hardware_lock locked upon entry |
| 306 | **/ |
| 307 | static void qla4xxx_process_response_queue(struct scsi_qla_host * ha) |
| 308 | { |
| 309 | uint32_t count = 0; |
| 310 | struct srb *srb = NULL; |
| 311 | struct status_entry *sts_entry; |
| 312 | |
| 313 | /* Process all responses from response queue */ |
| 314 | while ((ha->response_in = |
| 315 | (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in)) != |
| 316 | ha->response_out) { |
| 317 | sts_entry = (struct status_entry *) ha->response_ptr; |
| 318 | count++; |
| 319 | |
| 320 | /* Advance pointers for next entry */ |
| 321 | if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) { |
| 322 | ha->response_out = 0; |
| 323 | ha->response_ptr = ha->response_ring; |
| 324 | } else { |
| 325 | ha->response_out++; |
| 326 | ha->response_ptr++; |
| 327 | } |
| 328 | |
| 329 | /* process entry */ |
| 330 | switch (sts_entry->hdr.entryType) { |
| 331 | case ET_STATUS: |
| 332 | /* |
| 333 | * Common status - Single completion posted in single |
| 334 | * IOSB. |
| 335 | */ |
| 336 | qla4xxx_status_entry(ha, sts_entry); |
| 337 | break; |
| 338 | |
| 339 | case ET_PASSTHRU_STATUS: |
| 340 | break; |
| 341 | |
| 342 | case ET_STATUS_CONTINUATION: |
| 343 | /* Just throw away the status continuation entries */ |
| 344 | DEBUG2(printk("scsi%ld: %s: Status Continuation entry " |
| 345 | "- ignoring\n", ha->host_no, __func__)); |
| 346 | break; |
| 347 | |
| 348 | case ET_COMMAND: |
| 349 | /* ISP device queue is full. Command not |
| 350 | * accepted by ISP. Queue command for |
| 351 | * later */ |
| 352 | |
| 353 | srb = qla4xxx_del_from_active_array(ha, |
| 354 | le32_to_cpu(sts_entry-> |
| 355 | handle)); |
| 356 | if (srb == NULL) |
| 357 | goto exit_prq_invalid_handle; |
| 358 | |
| 359 | DEBUG2(printk("scsi%ld: %s: FW device queue full, " |
| 360 | "srb %p\n", ha->host_no, __func__, srb)); |
| 361 | |
| 362 | /* ETRY normally by sending it back with |
| 363 | * DID_BUS_BUSY */ |
| 364 | srb->cmd->result = DID_BUS_BUSY << 16; |
| 365 | qla4xxx_srb_compl(ha, srb); |
| 366 | break; |
| 367 | |
| 368 | case ET_CONTINUE: |
| 369 | /* Just throw away the continuation entries */ |
| 370 | DEBUG2(printk("scsi%ld: %s: Continuation entry - " |
| 371 | "ignoring\n", ha->host_no, __func__)); |
| 372 | break; |
| 373 | |
| 374 | default: |
| 375 | /* |
| 376 | * Invalid entry in response queue, reset RISC |
| 377 | * firmware. |
| 378 | */ |
| 379 | DEBUG2(printk("scsi%ld: %s: Invalid entry %x in " |
| 380 | "response queue \n", ha->host_no, |
| 381 | __func__, |
| 382 | sts_entry->hdr.entryType)); |
| 383 | goto exit_prq_error; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | /* |
| 388 | * Done with responses, update the ISP For QLA4010, this also clears |
| 389 | * the interrupt. |
| 390 | */ |
| 391 | writel(ha->response_out, &ha->reg->rsp_q_out); |
| 392 | readl(&ha->reg->rsp_q_out); |
| 393 | |
| 394 | return; |
| 395 | |
| 396 | exit_prq_invalid_handle: |
| 397 | DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n", |
| 398 | ha->host_no, __func__, srb, sts_entry->hdr.entryType, |
| 399 | sts_entry->completionStatus)); |
| 400 | |
| 401 | exit_prq_error: |
| 402 | writel(ha->response_out, &ha->reg->rsp_q_out); |
| 403 | readl(&ha->reg->rsp_q_out); |
| 404 | |
| 405 | set_bit(DPC_RESET_HA, &ha->dpc_flags); |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * qla4xxx_isr_decode_mailbox - decodes mailbox status |
| 410 | * @ha: Pointer to host adapter structure. |
| 411 | * @mailbox_status: Mailbox status. |
| 412 | * |
| 413 | * This routine decodes the mailbox status during the ISR. |
| 414 | * Hardware_lock locked upon entry. runs in interrupt context. |
| 415 | **/ |
| 416 | static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha, |
| 417 | uint32_t mbox_status) |
| 418 | { |
| 419 | int i; |
| 420 | |
| 421 | if ((mbox_status == MBOX_STS_BUSY) || |
| 422 | (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) || |
| 423 | (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) { |
| 424 | ha->mbox_status[0] = mbox_status; |
| 425 | |
| 426 | if (test_bit(AF_MBOX_COMMAND, &ha->flags)) { |
| 427 | /* |
| 428 | * Copy all mailbox registers to a temporary |
| 429 | * location and set mailbox command done flag |
| 430 | */ |
| 431 | for (i = 1; i < ha->mbox_status_count; i++) |
| 432 | ha->mbox_status[i] = |
| 433 | readl(&ha->reg->mailbox[i]); |
| 434 | |
| 435 | set_bit(AF_MBOX_COMMAND_DONE, &ha->flags); |
| 436 | wake_up(&ha->mailbox_wait_queue); |
| 437 | } |
| 438 | } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) { |
| 439 | /* Immediately process the AENs that don't require much work. |
| 440 | * Only queue the database_changed AENs */ |
| 441 | switch (mbox_status) { |
| 442 | case MBOX_ASTS_SYSTEM_ERROR: |
| 443 | /* Log Mailbox registers */ |
| 444 | if (ql4xdontresethba) { |
| 445 | DEBUG2(printk("%s:Dont Reset HBA\n", |
| 446 | __func__)); |
| 447 | } else { |
| 448 | set_bit(AF_GET_CRASH_RECORD, &ha->flags); |
| 449 | set_bit(DPC_RESET_HA, &ha->dpc_flags); |
| 450 | } |
| 451 | break; |
| 452 | |
| 453 | case MBOX_ASTS_REQUEST_TRANSFER_ERROR: |
| 454 | case MBOX_ASTS_RESPONSE_TRANSFER_ERROR: |
| 455 | case MBOX_ASTS_NVRAM_INVALID: |
| 456 | case MBOX_ASTS_IP_ADDRESS_CHANGED: |
| 457 | case MBOX_ASTS_DHCP_LEASE_EXPIRED: |
| 458 | DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, " |
| 459 | "Reset HA\n", ha->host_no, mbox_status)); |
| 460 | set_bit(DPC_RESET_HA, &ha->dpc_flags); |
| 461 | break; |
| 462 | |
| 463 | case MBOX_ASTS_LINK_UP: |
| 464 | DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK UP\n", |
| 465 | ha->host_no, mbox_status)); |
| 466 | set_bit(AF_LINK_UP, &ha->flags); |
| 467 | break; |
| 468 | |
| 469 | case MBOX_ASTS_LINK_DOWN: |
| 470 | DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK DOWN\n", |
| 471 | ha->host_no, mbox_status)); |
| 472 | clear_bit(AF_LINK_UP, &ha->flags); |
| 473 | break; |
| 474 | |
| 475 | case MBOX_ASTS_HEARTBEAT: |
| 476 | ha->seconds_since_last_heartbeat = 0; |
| 477 | break; |
| 478 | |
| 479 | case MBOX_ASTS_DHCP_LEASE_ACQUIRED: |
| 480 | DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE " |
| 481 | "ACQUIRED\n", ha->host_no, mbox_status)); |
| 482 | set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); |
| 483 | break; |
| 484 | |
| 485 | case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM: |
| 486 | case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target |
| 487 | * mode |
| 488 | * only */ |
| 489 | case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */ |
| 490 | case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR: |
| 491 | case MBOX_ASTS_SUBNET_STATE_CHANGE: |
| 492 | /* No action */ |
| 493 | DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no, |
| 494 | mbox_status)); |
| 495 | break; |
| 496 | |
| 497 | case MBOX_ASTS_MAC_ADDRESS_CHANGED: |
| 498 | case MBOX_ASTS_DNS: |
| 499 | /* No action */ |
| 500 | DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, " |
| 501 | "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n", |
| 502 | ha->host_no, mbox_status, |
| 503 | readl(&ha->reg->mailbox[1]), |
| 504 | readl(&ha->reg->mailbox[2]))); |
| 505 | break; |
| 506 | |
| 507 | case MBOX_ASTS_SELF_TEST_FAILED: |
| 508 | case MBOX_ASTS_LOGIN_FAILED: |
| 509 | /* No action */ |
| 510 | DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, " |
| 511 | "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n", |
| 512 | ha->host_no, mbox_status, |
| 513 | readl(&ha->reg->mailbox[1]), |
| 514 | readl(&ha->reg->mailbox[2]), |
| 515 | readl(&ha->reg->mailbox[3]))); |
| 516 | break; |
| 517 | |
| 518 | case MBOX_ASTS_DATABASE_CHANGED: |
| 519 | /* Queue AEN information and process it in the DPC |
| 520 | * routine */ |
| 521 | if (ha->aen_q_count > 0) { |
| 522 | /* advance pointer */ |
| 523 | if (ha->aen_in == (MAX_AEN_ENTRIES - 1)) |
| 524 | ha->aen_in = 0; |
| 525 | else |
| 526 | ha->aen_in++; |
| 527 | |
| 528 | /* decrement available counter */ |
| 529 | ha->aen_q_count--; |
| 530 | |
| 531 | for (i = 1; i < MBOX_AEN_REG_COUNT; i++) |
| 532 | ha->aen_q[ha->aen_in].mbox_sts[i] = |
| 533 | readl(&ha->reg->mailbox[i]); |
| 534 | |
| 535 | ha->aen_q[ha->aen_in].mbox_sts[0] = mbox_status; |
| 536 | |
| 537 | /* print debug message */ |
| 538 | DEBUG2(printk("scsi%ld: AEN[%d] %04x queued" |
| 539 | " mb1:0x%x mb2:0x%x mb3:0x%x mb4:0x%x\n", |
| 540 | ha->host_no, ha->aen_in, |
| 541 | mbox_status, |
| 542 | ha->aen_q[ha->aen_in].mbox_sts[1], |
| 543 | ha->aen_q[ha->aen_in].mbox_sts[2], |
| 544 | ha->aen_q[ha->aen_in].mbox_sts[3], |
| 545 | ha->aen_q[ha->aen_in]. mbox_sts[4])); |
| 546 | |
| 547 | /* The DPC routine will process the aen */ |
| 548 | set_bit(DPC_AEN, &ha->dpc_flags); |
| 549 | } else { |
| 550 | DEBUG2(printk("scsi%ld: %s: aen %04x, queue " |
| 551 | "overflowed! AEN LOST!!\n", |
| 552 | ha->host_no, __func__, |
| 553 | mbox_status)); |
| 554 | |
| 555 | DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n", |
| 556 | ha->host_no)); |
| 557 | |
| 558 | for (i = 0; i < MAX_AEN_ENTRIES; i++) { |
| 559 | DEBUG2(printk("AEN[%d] %04x %04x %04x " |
| 560 | "%04x\n", i, |
| 561 | ha->aen_q[i].mbox_sts[0], |
| 562 | ha->aen_q[i].mbox_sts[1], |
| 563 | ha->aen_q[i].mbox_sts[2], |
| 564 | ha->aen_q[i].mbox_sts[3])); |
| 565 | } |
| 566 | } |
| 567 | break; |
| 568 | |
| 569 | default: |
| 570 | DEBUG2(printk(KERN_WARNING |
| 571 | "scsi%ld: AEN %04x UNKNOWN\n", |
| 572 | ha->host_no, mbox_status)); |
| 573 | break; |
| 574 | } |
| 575 | } else { |
| 576 | DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n", |
| 577 | ha->host_no, mbox_status)); |
| 578 | |
| 579 | ha->mbox_status[0] = mbox_status; |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | /** |
| 584 | * qla4xxx_interrupt_service_routine - isr |
| 585 | * @ha: pointer to host adapter structure. |
| 586 | * |
| 587 | * This is the main interrupt service routine. |
| 588 | * hardware_lock locked upon entry. runs in interrupt context. |
| 589 | **/ |
| 590 | void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha, |
| 591 | uint32_t intr_status) |
| 592 | { |
| 593 | /* Process response queue interrupt. */ |
| 594 | if (intr_status & CSR_SCSI_COMPLETION_INTR) |
| 595 | qla4xxx_process_response_queue(ha); |
| 596 | |
| 597 | /* Process mailbox/asynch event interrupt.*/ |
| 598 | if (intr_status & CSR_SCSI_PROCESSOR_INTR) { |
| 599 | qla4xxx_isr_decode_mailbox(ha, |
| 600 | readl(&ha->reg->mailbox[0])); |
| 601 | |
| 602 | /* Clear Mailbox Interrupt */ |
| 603 | writel(set_rmask(CSR_SCSI_PROCESSOR_INTR), |
| 604 | &ha->reg->ctrl_status); |
| 605 | readl(&ha->reg->ctrl_status); |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * qla4xxx_intr_handler - hardware interrupt handler. |
| 611 | * @irq: Unused |
| 612 | * @dev_id: Pointer to host adapter structure |
David Somayajulu | afaf5a2 | 2006-09-19 10:28:00 -0700 | [diff] [blame] | 613 | **/ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 614 | irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id) |
David Somayajulu | afaf5a2 | 2006-09-19 10:28:00 -0700 | [diff] [blame] | 615 | { |
| 616 | struct scsi_qla_host *ha; |
| 617 | uint32_t intr_status; |
| 618 | unsigned long flags = 0; |
| 619 | uint8_t reqs_count = 0; |
| 620 | |
| 621 | ha = (struct scsi_qla_host *) dev_id; |
| 622 | if (!ha) { |
| 623 | DEBUG2(printk(KERN_INFO |
| 624 | "qla4xxx: Interrupt with NULL host ptr\n")); |
| 625 | return IRQ_NONE; |
| 626 | } |
| 627 | |
| 628 | spin_lock_irqsave(&ha->hardware_lock, flags); |
| 629 | |
David C Somayajulu | d915058 | 2006-11-15 17:38:40 -0800 | [diff] [blame] | 630 | ha->isr_count++; |
David Somayajulu | afaf5a2 | 2006-09-19 10:28:00 -0700 | [diff] [blame] | 631 | /* |
| 632 | * Repeatedly service interrupts up to a maximum of |
| 633 | * MAX_REQS_SERVICED_PER_INTR |
| 634 | */ |
| 635 | while (1) { |
| 636 | /* |
| 637 | * Read interrupt status |
| 638 | */ |
| 639 | if (le32_to_cpu(ha->shadow_regs->rsp_q_in) != |
| 640 | ha->response_out) |
| 641 | intr_status = CSR_SCSI_COMPLETION_INTR; |
| 642 | else |
| 643 | intr_status = readl(&ha->reg->ctrl_status); |
| 644 | |
| 645 | if ((intr_status & |
| 646 | (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == |
| 647 | 0) { |
| 648 | if (reqs_count == 0) |
| 649 | ha->spurious_int_count++; |
| 650 | break; |
| 651 | } |
| 652 | |
| 653 | if (intr_status & CSR_FATAL_ERROR) { |
| 654 | DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, " |
| 655 | "Status 0x%04x\n", ha->host_no, |
| 656 | readl(isp_port_error_status (ha)))); |
| 657 | |
| 658 | /* Issue Soft Reset to clear this error condition. |
| 659 | * This will prevent the RISC from repeatedly |
| 660 | * interrupting the driver; thus, allowing the DPC to |
| 661 | * get scheduled to continue error recovery. |
| 662 | * NOTE: Disabling RISC interrupts does not work in |
| 663 | * this case, as CSR_FATAL_ERROR overrides |
| 664 | * CSR_SCSI_INTR_ENABLE */ |
| 665 | if ((readl(&ha->reg->ctrl_status) & |
| 666 | CSR_SCSI_RESET_INTR) == 0) { |
| 667 | writel(set_rmask(CSR_SOFT_RESET), |
| 668 | &ha->reg->ctrl_status); |
| 669 | readl(&ha->reg->ctrl_status); |
| 670 | } |
| 671 | |
| 672 | writel(set_rmask(CSR_FATAL_ERROR), |
| 673 | &ha->reg->ctrl_status); |
| 674 | readl(&ha->reg->ctrl_status); |
| 675 | |
| 676 | __qla4xxx_disable_intrs(ha); |
| 677 | |
| 678 | set_bit(DPC_RESET_HA, &ha->dpc_flags); |
| 679 | |
| 680 | break; |
| 681 | } else if (intr_status & CSR_SCSI_RESET_INTR) { |
| 682 | clear_bit(AF_ONLINE, &ha->flags); |
| 683 | __qla4xxx_disable_intrs(ha); |
| 684 | |
| 685 | writel(set_rmask(CSR_SCSI_RESET_INTR), |
| 686 | &ha->reg->ctrl_status); |
| 687 | readl(&ha->reg->ctrl_status); |
| 688 | |
| 689 | set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); |
| 690 | |
| 691 | break; |
| 692 | } else if (intr_status & INTR_PENDING) { |
| 693 | qla4xxx_interrupt_service_routine(ha, intr_status); |
| 694 | ha->total_io_count++; |
| 695 | if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) |
| 696 | break; |
| 697 | |
| 698 | intr_status = 0; |
| 699 | } |
| 700 | } |
| 701 | |
| 702 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
| 703 | |
| 704 | return IRQ_HANDLED; |
| 705 | } |
| 706 | |
| 707 | /** |
| 708 | * qla4xxx_process_aen - processes AENs generated by firmware |
| 709 | * @ha: pointer to host adapter structure. |
| 710 | * @process_aen: type of AENs to process |
| 711 | * |
| 712 | * Processes specific types of Asynchronous Events generated by firmware. |
| 713 | * The type of AENs to process is specified by process_aen and can be |
| 714 | * PROCESS_ALL_AENS 0 |
| 715 | * FLUSH_DDB_CHANGED_AENS 1 |
| 716 | * RELOGIN_DDB_CHANGED_AENS 2 |
| 717 | **/ |
| 718 | void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen) |
| 719 | { |
| 720 | uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; |
| 721 | struct aen *aen; |
| 722 | int i; |
| 723 | unsigned long flags; |
| 724 | |
| 725 | spin_lock_irqsave(&ha->hardware_lock, flags); |
| 726 | while (ha->aen_out != ha->aen_in) { |
| 727 | /* Advance pointers for next entry */ |
| 728 | if (ha->aen_out == (MAX_AEN_ENTRIES - 1)) |
| 729 | ha->aen_out = 0; |
| 730 | else |
| 731 | ha->aen_out++; |
| 732 | |
| 733 | ha->aen_q_count++; |
| 734 | aen = &ha->aen_q[ha->aen_out]; |
| 735 | |
| 736 | /* copy aen information to local structure */ |
| 737 | for (i = 0; i < MBOX_AEN_REG_COUNT; i++) |
| 738 | mbox_sts[i] = aen->mbox_sts[i]; |
| 739 | |
| 740 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
| 741 | |
| 742 | DEBUG(printk("scsi%ld: AEN[%d] %04x, index [%d] state=%04x " |
| 743 | "mod=%x conerr=%08x \n", ha->host_no, ha->aen_out, |
| 744 | mbox_sts[0], mbox_sts[2], mbox_sts[3], |
| 745 | mbox_sts[1], mbox_sts[4])); |
| 746 | |
| 747 | switch (mbox_sts[0]) { |
| 748 | case MBOX_ASTS_DATABASE_CHANGED: |
| 749 | if (process_aen == FLUSH_DDB_CHANGED_AENS) { |
| 750 | DEBUG2(printk("scsi%ld: AEN[%d] %04x, index " |
| 751 | "[%d] state=%04x FLUSHED!\n", |
| 752 | ha->host_no, ha->aen_out, |
| 753 | mbox_sts[0], mbox_sts[2], |
| 754 | mbox_sts[3])); |
| 755 | break; |
| 756 | } else if (process_aen == RELOGIN_DDB_CHANGED_AENS) { |
| 757 | /* for use during init time, we only want to |
| 758 | * relogin non-active ddbs */ |
| 759 | struct ddb_entry *ddb_entry; |
| 760 | |
| 761 | ddb_entry = |
| 762 | /* FIXME: name length? */ |
| 763 | qla4xxx_lookup_ddb_by_fw_index(ha, |
| 764 | mbox_sts[2]); |
| 765 | if (!ddb_entry) |
| 766 | break; |
| 767 | |
| 768 | ddb_entry->dev_scan_wait_to_complete_relogin = |
| 769 | 0; |
| 770 | ddb_entry->dev_scan_wait_to_start_relogin = |
| 771 | jiffies + |
| 772 | ((ddb_entry->default_time2wait + |
| 773 | 4) * HZ); |
| 774 | |
| 775 | DEBUG2(printk("scsi%ld: ddb index [%d] initate" |
| 776 | " RELOGIN after %d seconds\n", |
| 777 | ha->host_no, |
| 778 | ddb_entry->fw_ddb_index, |
| 779 | ddb_entry->default_time2wait + |
| 780 | 4)); |
| 781 | break; |
| 782 | } |
| 783 | |
| 784 | if (mbox_sts[1] == 0) { /* Global DB change. */ |
| 785 | qla4xxx_reinitialize_ddb_list(ha); |
| 786 | } else if (mbox_sts[1] == 1) { /* Specific device. */ |
| 787 | qla4xxx_process_ddb_changed(ha, mbox_sts[2], |
| 788 | mbox_sts[3]); |
| 789 | } |
| 790 | break; |
| 791 | } |
| 792 | spin_lock_irqsave(&ha->hardware_lock, flags); |
| 793 | } |
| 794 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
| 795 | |
| 796 | } |
| 797 | |