| 1 | |
| 2 | |
| 3 | * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
|
| 4 | *
|
| 5 | * Written By: Anil Ravindranath<[email protected]>
|
| 6 | * PMC-Sierra Inc
|
| 7 | *
|
| 8 | * Copyright (C) 2008, 2009 PMC Sierra Inc
|
| 9 |
|
| 10 | #include <linux/fs.h>
|
| 11 | #include <linux/init.h>
|
| 12 | #include <linux/types.h>
|
| 13 | #include <linux/errno.h>
|
| 14 | #include <linux/kernel.h>
|
| 15 | #include <linux/ioport.h>
|
| 16 | #include <linux/delay.h>
|
| 17 | #include <linux/pci.h>
|
| 18 | #include <linux/wait.h>
|
| 19 | #include <linux/spinlock.h>
|
| 20 | #include <linux/sched.h>
|
| 21 | #include <linux/interrupt.h>
|
| 22 | #include <linux/blkdev.h>
|
| 23 | #include <linux/firmware.h>
|
| 24 | #include <linux/module.h>
|
| 25 | #include <linux/moduleparam.h>
|
| 26 | #include <linux/hdreg.h>
|
| 27 | #include <linux/io.h>
|
| 28 | #include <linux/slab.h>
|
| 29 | #include <asm/irq.h>
|
| 30 | #include <asm/processor.h>
|
| 31 | #include <linux/libata.h>
|
| 32 | #include <linux/mutex.h>
|
| 33 | #include <linux/ktime.h>
|
| 34 | #include <scsi/scsi.h>
|
| 35 | #include <scsi/scsi_host.h>
|
| 36 | #include <scsi/scsi_device.h>
|
| 37 | #include <scsi/scsi_tcq.h>
|
| 38 | #include <scsi/scsi_eh.h>
|
| 39 | #include <scsi/scsi_cmnd.h>
|
| 40 | #include <scsi/scsicam.h>
|
| 41 |
|
| 42 | #include "pmcraid.h"
|
| 43 |
|
| 44 | |
| 45 | * Module configuration parameters
|
| 46 |
|
| 47 | static unsigned int pmcraid_debug_log;
|
| 48 | static unsigned int pmcraid_disable_aen;
|
| 49 | static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
|
| 50 | static unsigned int pmcraid_enable_msix;
|
| 51 |
|
| 52 | |
| 53 | * Data structures to support multiple adapters by the LLD.
|
| 54 | * pmcraid_adapter_count - count of configured adapters
|
| 55 |
|
| 56 | static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
|
| 57 |
|
| 58 | |
| 59 | * Supporting user-level control interface through IOCTL commands.
|
| 60 | * pmcraid_major - major number to use
|
| 61 | * pmcraid_minor - minor number(s) to use
|
| 62 |
|
| 63 | static unsigned int pmcraid_major;
|
| 64 | static const struct class pmcraid_class = {
|
| 65 | .name = PMCRAID_DEVFILE,
|
| 66 | };
|
| 67 | static DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
|
| 68 |
|
| 69 | |
| 70 | * Module parameters
|
| 71 |
|
| 72 | MODULE_AUTHOR("Anil Ravindranath<[email protected]>");
|
| 73 | MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
|
| 74 | MODULE_LICENSE("GPL");
|
| 75 | MODULE_VERSION(PMCRAID_DRIVER_VERSION);
|
| 76 |
|
| 77 | module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
|
| 78 | MODULE_PARM_DESC(log_level,
|
| 79 | "Enables firmware error code logging, default :1 high-severity"
|
| 80 | " errors, 2: all errors including high-severity errors,"
|
| 81 | " 0: disables logging");
|
| 82 |
|
| 83 | module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
|
| 84 | MODULE_PARM_DESC(debug,
|
| 85 | "Enable driver verbose message logging. Set 1 to enable."
|
| 86 | "(default: 0)");
|
| 87 |
|
| 88 | module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
|
| 89 | MODULE_PARM_DESC(disable_aen,
|
| 90 | "Disable driver aen notifications to apps. Set 1 to disable."
|
| 91 | "(default: 0)");
|
| 92 |
|
| 93 | |
| 94 | * 0x5220 and 0x8010
|
| 95 |
|
| 96 | static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
|
| 97 | {
|
| 98 | .ioastatus = 0x0,
|
| 99 | .ioarrin = 0x00040,
|
| 100 | .mailbox = 0x7FC30,
|
| 101 | .global_intr_mask = 0x00034,
|
| 102 | .ioa_host_intr = 0x0009C,
|
| 103 | .ioa_host_intr_clr = 0x000A0,
|
| 104 | .ioa_host_msix_intr = 0x7FC40,
|
| 105 | .ioa_host_mask = 0x7FC28,
|
| 106 | .ioa_host_mask_clr = 0x7FC28,
|
| 107 | .host_ioa_intr = 0x00020,
|
| 108 | .host_ioa_intr_clr = 0x00020,
|
| 109 | .transop_timeout = 300
|
| 110 | }
|
| 111 | };
|
| 112 |
|
| 113 | |
| 114 | * PCI device ids supported by pmcraid driver
|
| 115 |
|
| 116 | static const struct pci_device_id pmcraid_pci_table[] = {
|
| 117 | { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
|
| 118 | 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
|
| 119 | },
|
| 120 | {}
|
| 121 | };
|
| 122 |
|
| 123 | MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
|
| 124 |
|
| 125 |
|
| 126 |
|
| 127 | |
| 128 | * pmcraid_sdev_init - Prepare for commands to a device
|
| 129 | * @scsi_dev: scsi device struct
|
| 130 | *
|
| 131 | * This function is called by mid-layer prior to sending any command to the new
|
| 132 | * device. Stores resource entry details of the device in scsi_device struct.
|
| 133 | * Queuecommand uses the resource handle and other details to fill up IOARCB
|
| 134 | * while sending commands to the device.
|
| 135 | *
|
| 136 | * Return value:
|
| 137 | * 0 on success / -ENXIO if device does not exist
|
| 138 |
|
| 139 | static int pmcraid_sdev_init(struct scsi_device *scsi_dev)
|
| 140 | {
|
| 141 | struct pmcraid_resource_entry *temp, *res = NULL;
|
| 142 | struct pmcraid_instance *pinstance;
|
| 143 | u8 target, bus, lun;
|
| 144 | unsigned long lock_flags;
|
| 145 | int rc = -ENXIO;
|
| 146 | u16 fw_version;
|
| 147 |
|
| 148 | pinstance = shost_priv(scsi_dev->host);
|
| 149 |
|
| 150 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
|
| 151 |
|
| 152 | |
| 153 | * are not exposed. Resource list is synchronized using resource lock
|
| 154 | * so any traversal or modifications to the list should be done inside
|
| 155 | * this lock
|
| 156 |
|
| 157 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
|
| 158 | list_for_each_entry(temp, &pinstance->used_res_q, queue) {
|
| 159 |
|
| 160 |
|
| 161 | if (RES_IS_VSET(temp->cfg_entry)) {
|
| 162 | if (fw_version <= PMCRAID_FW_VERSION_1)
|
| 163 | target = temp->cfg_entry.unique_flags1;
|
| 164 | else
|
| 165 | target = le16_to_cpu(temp->cfg_entry.array_id) & 0xFF;
|
| 166 |
|
| 167 | if (target > PMCRAID_MAX_VSET_TARGETS)
|
| 168 | continue;
|
| 169 | bus = PMCRAID_VSET_BUS_ID;
|
| 170 | lun = 0;
|
| 171 | } else if (RES_IS_GSCSI(temp->cfg_entry)) {
|
| 172 | target = RES_TARGET(temp->cfg_entry.resource_address);
|
| 173 | bus = PMCRAID_PHYS_BUS_ID;
|
| 174 | lun = RES_LUN(temp->cfg_entry.resource_address);
|
| 175 | } else {
|
| 176 | continue;
|
| 177 | }
|
| 178 |
|
| 179 | if (bus == scsi_dev->channel &&
|
| 180 | target == scsi_dev->id &&
|
| 181 | lun == scsi_dev->lun) {
|
| 182 | res = temp;
|
| 183 | break;
|
| 184 | }
|
| 185 | }
|
| 186 |
|
| 187 | if (res) {
|
| 188 | res->scsi_dev = scsi_dev;
|
| 189 | scsi_dev->hostdata = res;
|
| 190 | res->change_detected = 0;
|
| 191 | atomic_set(&res->read_failures, 0);
|
| 192 | atomic_set(&res->write_failures, 0);
|
| 193 | rc = 0;
|
| 194 | }
|
| 195 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
|
| 196 | return rc;
|
| 197 | }
|
| 198 |
|
| 199 | |
| 200 | * pmcraid_sdev_configure - Configures a SCSI device
|
| 201 | * @scsi_dev: scsi device struct
|
| 202 | * @lim: queue limits
|
| 203 | *
|
| 204 | * This function is executed by SCSI mid layer just after a device is first
|
| 205 | * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
|
| 206 | * timeout value (default 30s) will be over-written to a higher value (60s)
|
| 207 | * and max_sectors value will be over-written to 512. It also sets queue depth
|
| 208 | * to host->cmd_per_lun value
|
| 209 | *
|
| 210 | * Return value:
|
| 211 | * 0 on success
|
| 212 |
|
| 213 | static int pmcraid_sdev_configure(struct scsi_device *scsi_dev,
|
| 214 | struct queue_limits *lim)
|
| 215 | {
|
| 216 | struct pmcraid_resource_entry *res = scsi_dev->hostdata;
|
| 217 |
|
| 218 | if (!res)
|
| 219 | return 0;
|
| 220 |
|
| 221 |
|
| 222 | if (RES_IS_GSCSI(res->cfg_entry) &&
|
| 223 | scsi_dev->type != TYPE_ENCLOSURE)
|
| 224 | return -ENXIO;
|
| 225 |
|
| 226 | pmcraid_info("configuring %x:%x:%x:%x\n",
|
| 227 | scsi_dev->host->unique_id,
|
| 228 | scsi_dev->channel,
|
| 229 | scsi_dev->id,
|
| 230 | (u8)scsi_dev->lun);
|
| 231 |
|
| 232 | if (RES_IS_GSCSI(res->cfg_entry)) {
|
| 233 | scsi_dev->allow_restart = 1;
|
| 234 | } else if (RES_IS_VSET(res->cfg_entry)) {
|
| 235 | scsi_dev->allow_restart = 1;
|
| 236 | blk_queue_rq_timeout(scsi_dev->request_queue,
|
| 237 | PMCRAID_VSET_IO_TIMEOUT);
|
| 238 | lim->max_hw_sectors = PMCRAID_VSET_MAX_SECTORS;
|
| 239 | }
|
| 240 |
|
| 241 | |
| 242 | * We never want to report TCQ support for these types of devices.
|
| 243 |
|
| 244 | if (!RES_IS_GSCSI(res->cfg_entry) && !RES_IS_VSET(res->cfg_entry))
|
| 245 | scsi_dev->tagged_supported = 0;
|
| 246 |
|
| 247 | return 0;
|
| 248 | }
|
| 249 |
|
| 250 | |
| 251 | * pmcraid_sdev_destroy - Unconfigure a SCSI device before removing it
|
| 252 | *
|
| 253 | * @scsi_dev: scsi device struct
|
| 254 | *
|
| 255 | * This is called by mid-layer before removing a device. Pointer assignments
|
| 256 | * done in pmcraid_sdev_init will be reset to NULL here.
|
| 257 | *
|
| 258 | * Return value
|
| 259 | * none
|
| 260 |
|
| 261 | static void pmcraid_sdev_destroy(struct scsi_device *scsi_dev)
|
| 262 | {
|
| 263 | struct pmcraid_resource_entry *res;
|
| 264 |
|
| 265 | res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
|
| 266 |
|
| 267 | if (res)
|
| 268 | res->scsi_dev = NULL;
|
| 269 |
|
| 270 | scsi_dev->hostdata = NULL;
|
| 271 | }
|
| 272 |
|
| 273 | |
| 274 | * pmcraid_change_queue_depth - Change the device's queue depth
|
| 275 | * @scsi_dev: scsi device struct
|
| 276 | * @depth: depth to set
|
| 277 | *
|
| 278 | * Return value
|
| 279 | * actual depth set
|
| 280 |
|
| 281 | static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth)
|
| 282 | {
|
| 283 | if (depth > PMCRAID_MAX_CMD_PER_LUN)
|
| 284 | depth = PMCRAID_MAX_CMD_PER_LUN;
|
| 285 | return scsi_change_queue_depth(scsi_dev, depth);
|
| 286 | }
|
| 287 |
|
| 288 | |
| 289 | * pmcraid_init_cmdblk - initializes a command block
|
| 290 | *
|
| 291 | * @cmd: pointer to struct pmcraid_cmd to be initialized
|
| 292 | * @index: if >=0 first time initialization; otherwise reinitialization
|
| 293 | *
|
| 294 | * Return Value
|
| 295 | * None
|
| 296 |
|
| 297 | static void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
|
| 298 | {
|
| 299 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
|
| 300 | dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
|
| 301 |
|
| 302 | if (index >= 0) {
|
| 303 |
|
| 304 | u32 ioasa_offset =
|
| 305 | offsetof(struct pmcraid_control_block, ioasa);
|
| 306 |
|
| 307 | cmd->index = index;
|
| 308 | ioarcb->response_handle = cpu_to_le32(index << 2);
|
| 309 | ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
|
| 310 | ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
|
| 311 | ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
|
| 312 | } else {
|
| 313 | |
| 314 | * processed by IOA
|
| 315 |
|
| 316 | memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
|
| 317 | ioarcb->hrrq_id = 0;
|
| 318 | ioarcb->request_flags0 = 0;
|
| 319 | ioarcb->request_flags1 = 0;
|
| 320 | ioarcb->cmd_timeout = 0;
|
| 321 | ioarcb->ioarcb_bus_addr &= cpu_to_le64(~0x1FULL);
|
| 322 | ioarcb->ioadl_bus_addr = 0;
|
| 323 | ioarcb->ioadl_length = 0;
|
| 324 | ioarcb->data_transfer_length = 0;
|
| 325 | ioarcb->add_cmd_param_length = 0;
|
| 326 | ioarcb->add_cmd_param_offset = 0;
|
| 327 | cmd->ioa_cb->ioasa.ioasc = 0;
|
| 328 | cmd->ioa_cb->ioasa.residual_data_length = 0;
|
| 329 | cmd->time_left = 0;
|
| 330 | }
|
| 331 |
|
| 332 | cmd->cmd_done = NULL;
|
| 333 | cmd->scsi_cmd = NULL;
|
| 334 | cmd->release = 0;
|
| 335 | cmd->completion_req = 0;
|
| 336 | cmd->sense_buffer = NULL;
|
| 337 | cmd->sense_buffer_dma = 0;
|
| 338 | cmd->dma_handle = 0;
|
| 339 | timer_setup(&cmd->timer, NULL, 0);
|
| 340 | }
|
| 341 |
|
| 342 | |
| 343 | * pmcraid_reinit_cmdblk - reinitialize a command block
|
| 344 | *
|
| 345 | * @cmd: pointer to struct pmcraid_cmd to be reinitialized
|
| 346 | *
|
| 347 | * Return Value
|
| 348 | * None
|
| 349 |
|
| 350 | static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
|
| 351 | {
|
| 352 | pmcraid_init_cmdblk(cmd, -1);
|
| 353 | }
|
| 354 |
|
| 355 | |
| 356 | * pmcraid_get_free_cmd - get a free cmd block from command block pool
|
| 357 | * @pinstance: adapter instance structure
|
| 358 | *
|
| 359 | * Return Value:
|
| 360 | * returns pointer to cmd block or NULL if no blocks are available
|
| 361 |
|
| 362 | static struct pmcraid_cmd *pmcraid_get_free_cmd(
|
| 363 | struct pmcraid_instance *pinstance
|
| 364 | )
|
| 365 | {
|
| 366 | struct pmcraid_cmd *cmd = NULL;
|
| 367 | unsigned long lock_flags;
|
| 368 |
|
| 369 |
|
| 370 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
|
| 371 |
|
| 372 | if (!list_empty(&pinstance->free_cmd_pool)) {
|
| 373 | cmd = list_entry(pinstance->free_cmd_pool.next,
|
| 374 | struct pmcraid_cmd, free_list);
|
| 375 | list_del(&cmd->free_list);
|
| 376 | }
|
| 377 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
|
| 378 |
|
| 379 |
|
| 380 | if (cmd != NULL)
|
| 381 | pmcraid_reinit_cmdblk(cmd);
|
| 382 | return cmd;
|
| 383 | }
|
| 384 |
|
| 385 | |
| 386 | * pmcraid_return_cmd - return a completed command block back into free pool
|
| 387 | * @cmd: pointer to the command block
|
| 388 | *
|
| 389 | * Return Value:
|
| 390 | * nothing
|
| 391 |
|
| 392 | static void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
|
| 393 | {
|
| 394 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 395 | unsigned long lock_flags;
|
| 396 |
|
| 397 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
|
| 398 | list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
|
| 399 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
|
| 400 | }
|
| 401 |
|
| 402 | |
| 403 | * pmcraid_read_interrupts - reads IOA interrupts
|
| 404 | *
|
| 405 | * @pinstance: pointer to adapter instance structure
|
| 406 | *
|
| 407 | * Return value
|
| 408 | * interrupts read from IOA
|
| 409 |
|
| 410 | static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
|
| 411 | {
|
| 412 | return (pinstance->interrupt_mode) ?
|
| 413 | ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
|
| 414 | ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
|
| 415 | }
|
| 416 |
|
| 417 | |
| 418 | * pmcraid_disable_interrupts - Masks and clears all specified interrupts
|
| 419 | *
|
| 420 | * @pinstance: pointer to per adapter instance structure
|
| 421 | * @intrs: interrupts to disable
|
| 422 | *
|
| 423 | * Return Value
|
| 424 | * None
|
| 425 |
|
| 426 | static void pmcraid_disable_interrupts(
|
| 427 | struct pmcraid_instance *pinstance,
|
| 428 | u32 intrs
|
| 429 | )
|
| 430 | {
|
| 431 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
|
| 432 | u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
|
| 433 |
|
| 434 | iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
| 435 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
|
| 436 | ioread32(pinstance->int_regs.global_interrupt_mask_reg);
|
| 437 |
|
| 438 | if (!pinstance->interrupt_mode) {
|
| 439 | iowrite32(intrs,
|
| 440 | pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
| 441 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
| 442 | }
|
| 443 | }
|
| 444 |
|
| 445 | |
| 446 | * pmcraid_enable_interrupts - Enables specified interrupts
|
| 447 | *
|
| 448 | * @pinstance: pointer to per adapter instance structure
|
| 449 | * @intrs: interrupts to enable
|
| 450 | *
|
| 451 | * Return Value
|
| 452 | * None
|
| 453 |
|
| 454 | static void pmcraid_enable_interrupts(
|
| 455 | struct pmcraid_instance *pinstance,
|
| 456 | u32 intrs)
|
| 457 | {
|
| 458 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
|
| 459 | u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
|
| 460 |
|
| 461 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
|
| 462 |
|
| 463 | if (!pinstance->interrupt_mode) {
|
| 464 | iowrite32(~intrs,
|
| 465 | pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
| 466 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
| 467 | }
|
| 468 |
|
| 469 | pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
|
| 470 | ioread32(pinstance->int_regs.global_interrupt_mask_reg),
|
| 471 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
|
| 472 | }
|
| 473 |
|
| 474 | |
| 475 | * pmcraid_clr_trans_op - clear trans to op interrupt
|
| 476 | *
|
| 477 | * @pinstance: pointer to per adapter instance structure
|
| 478 | *
|
| 479 | * Return Value
|
| 480 | * None
|
| 481 |
|
| 482 | static void pmcraid_clr_trans_op(
|
| 483 | struct pmcraid_instance *pinstance
|
| 484 | )
|
| 485 | {
|
| 486 | unsigned long lock_flags;
|
| 487 |
|
| 488 | if (!pinstance->interrupt_mode) {
|
| 489 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
|
| 490 | pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
| 491 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
| 492 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
|
| 493 | pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
| 494 | ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
| 495 | }
|
| 496 |
|
| 497 | if (pinstance->reset_cmd != NULL) {
|
| 498 | timer_delete(&pinstance->reset_cmd->timer);
|
| 499 | spin_lock_irqsave(
|
| 500 | pinstance->host->host_lock, lock_flags);
|
| 501 | pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
|
| 502 | spin_unlock_irqrestore(
|
| 503 | pinstance->host->host_lock, lock_flags);
|
| 504 | }
|
| 505 | }
|
| 506 |
|
| 507 | |
| 508 | * pmcraid_reset_type - Determine the required reset type
|
| 509 | * @pinstance: pointer to adapter instance structure
|
| 510 | *
|
| 511 | * IOA requires hard reset if any of the following conditions is true.
|
| 512 | * 1. If HRRQ valid interrupt is not masked
|
| 513 | * 2. IOA reset alert doorbell is set
|
| 514 | * 3. If there are any error interrupts
|
| 515 |
|
| 516 | static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
|
| 517 | {
|
| 518 | u32 mask;
|
| 519 | u32 intrs;
|
| 520 | u32 alerts;
|
| 521 |
|
| 522 | mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
|
| 523 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
|
| 524 | alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
| 525 |
|
| 526 | if ((mask & INTRS_HRRQ_VALID) == 0 ||
|
| 527 | (alerts & DOORBELL_IOA_RESET_ALERT) ||
|
| 528 | (intrs & PMCRAID_ERROR_INTERRUPTS)) {
|
| 529 | pmcraid_info("IOA requires hard reset\n");
|
| 530 | pinstance->ioa_hard_reset = 1;
|
| 531 | }
|
| 532 |
|
| 533 |
|
| 534 | if (intrs & INTRS_IOA_UNIT_CHECK)
|
| 535 | pinstance->ioa_unit_check = 1;
|
| 536 | }
|
| 537 |
|
| 538 | static void pmcraid_ioa_reset(struct pmcraid_cmd *);
|
| 539 | |
| 540 | * pmcraid_bist_done - completion function for PCI BIST
|
| 541 | * @t: pointer to reset command
|
| 542 | * Return Value
|
| 543 | * none
|
| 544 |
|
| 545 | static void pmcraid_bist_done(struct timer_list *t)
|
| 546 | {
|
| 547 | struct pmcraid_cmd *cmd = timer_container_of(cmd, t, timer);
|
| 548 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 549 | unsigned long lock_flags;
|
| 550 | int rc;
|
| 551 | u16 pci_reg;
|
| 552 |
|
| 553 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
|
| 554 |
|
| 555 |
|
| 556 | if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
|
| 557 | cmd->time_left > 0) {
|
| 558 | pmcraid_info("BIST not complete, waiting another 2 secs\n");
|
| 559 | cmd->timer.expires = jiffies + cmd->time_left;
|
| 560 | cmd->time_left = 0;
|
| 561 | add_timer(&cmd->timer);
|
| 562 | } else {
|
| 563 | cmd->time_left = 0;
|
| 564 | pmcraid_info("BIST is complete, proceeding with reset\n");
|
| 565 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 566 | pmcraid_ioa_reset(cmd);
|
| 567 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 568 | }
|
| 569 | }
|
| 570 |
|
| 571 | |
| 572 | * pmcraid_start_bist - starts BIST
|
| 573 | * @cmd: pointer to reset cmd
|
| 574 | * Return Value
|
| 575 | * none
|
| 576 |
|
| 577 | static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
|
| 578 | {
|
| 579 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 580 | u32 doorbells, intrs;
|
| 581 |
|
| 582 |
|
| 583 | iowrite32(DOORBELL_IOA_START_BIST,
|
| 584 | pinstance->int_regs.host_ioa_interrupt_reg);
|
| 585 | doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
| 586 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
|
| 587 | pmcraid_info("doorbells after start bist: %x intrs: %x\n",
|
| 588 | doorbells, intrs);
|
| 589 |
|
| 590 | cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
|
| 591 | cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
|
| 592 | cmd->timer.function = pmcraid_bist_done;
|
| 593 | add_timer(&cmd->timer);
|
| 594 | }
|
| 595 |
|
| 596 | |
| 597 | * pmcraid_reset_alert_done - completion routine for reset_alert
|
| 598 | * @t: pointer to command block used in reset sequence
|
| 599 | * Return value
|
| 600 | * None
|
| 601 |
|
| 602 | static void pmcraid_reset_alert_done(struct timer_list *t)
|
| 603 | {
|
| 604 | struct pmcraid_cmd *cmd = timer_container_of(cmd, t, timer);
|
| 605 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 606 | u32 status = ioread32(pinstance->ioa_status);
|
| 607 | unsigned long lock_flags;
|
| 608 |
|
| 609 | |
| 610 | * out, invoke reset engine to proceed with hard reset. If there is
|
| 611 | * some more time to wait, restart the timer
|
| 612 |
|
| 613 | if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
|
| 614 | cmd->time_left <= 0) {
|
| 615 | pmcraid_info("critical op is reset proceeding with reset\n");
|
| 616 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 617 | pmcraid_ioa_reset(cmd);
|
| 618 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 619 | } else {
|
| 620 | pmcraid_info("critical op is not yet reset waiting again\n");
|
| 621 |
|
| 622 | cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
|
| 623 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
|
| 624 | cmd->timer.function = pmcraid_reset_alert_done;
|
| 625 | add_timer(&cmd->timer);
|
| 626 | }
|
| 627 | }
|
| 628 |
|
| 629 | static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
|
| 630 | |
| 631 | * pmcraid_reset_alert - alerts IOA for a possible reset
|
| 632 | * @cmd: command block to be used for reset sequence.
|
| 633 | *
|
| 634 | * Return Value
|
| 635 | * returns 0 if pci config-space is accessible and RESET_DOORBELL is
|
| 636 | * successfully written to IOA. Returns non-zero in case pci_config_space
|
| 637 | * is not accessible
|
| 638 |
|
| 639 | static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
|
| 640 | {
|
| 641 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 642 | u32 doorbells;
|
| 643 | int rc;
|
| 644 | u16 pci_reg;
|
| 645 |
|
| 646 | |
| 647 | * going to reset it soon. This enables IOA to preserv persistent error
|
| 648 | * data if any. In case memory space is not accessible, proceed with
|
| 649 | * BIST or slot_reset
|
| 650 |
|
| 651 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
|
| 652 | if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
|
| 653 |
|
| 654 | |
| 655 | * reset IOA doesn't generate any interrupts when CRITICAL
|
| 656 | * OPERATION bit is reset. A timer is started to wait for this
|
| 657 | * bit to be reset.
|
| 658 |
|
| 659 | cmd->time_left = PMCRAID_RESET_TIMEOUT;
|
| 660 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
|
| 661 | cmd->timer.function = pmcraid_reset_alert_done;
|
| 662 | add_timer(&cmd->timer);
|
| 663 |
|
| 664 | iowrite32(DOORBELL_IOA_RESET_ALERT,
|
| 665 | pinstance->int_regs.host_ioa_interrupt_reg);
|
| 666 | doorbells =
|
| 667 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
| 668 | pmcraid_info("doorbells after reset alert: %x\n", doorbells);
|
| 669 | } else {
|
| 670 | pmcraid_info("PCI config is not accessible starting BIST\n");
|
| 671 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
|
| 672 | pmcraid_start_bist(cmd);
|
| 673 | }
|
| 674 | }
|
| 675 |
|
| 676 | |
| 677 | * pmcraid_timeout_handler - Timeout handler for internally generated ops
|
| 678 | *
|
| 679 | * @t: pointer to command structure, that got timedout
|
| 680 | *
|
| 681 | * This function blocks host requests and initiates an adapter reset.
|
| 682 | *
|
| 683 | * Return value:
|
| 684 | * None
|
| 685 |
|
| 686 | static void pmcraid_timeout_handler(struct timer_list *t)
|
| 687 | {
|
| 688 | struct pmcraid_cmd *cmd = timer_container_of(cmd, t, timer);
|
| 689 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 690 | unsigned long lock_flags;
|
| 691 |
|
| 692 | dev_info(&pinstance->pdev->dev,
|
| 693 | "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
|
| 694 | cmd->ioa_cb->ioarcb.cdb[0]);
|
| 695 |
|
| 696 | |
| 697 | * timed out may be the one used as part of reset sequence. In this
|
| 698 | * case restart reset sequence using the same command block even if
|
| 699 | * reset is in progress. Otherwise fail this command and get a free
|
| 700 | * command block to restart the reset sequence.
|
| 701 |
|
| 702 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 703 | if (!pinstance->ioa_reset_in_progress) {
|
| 704 | pinstance->ioa_reset_attempts = 0;
|
| 705 | cmd = pmcraid_get_free_cmd(pinstance);
|
| 706 |
|
| 707 | |
| 708 | * Some other command's timeout handler can do the reset job
|
| 709 |
|
| 710 | if (cmd == NULL) {
|
| 711 | spin_unlock_irqrestore(pinstance->host->host_lock,
|
| 712 | lock_flags);
|
| 713 | pmcraid_err("no free cmnd block for timeout handler\n");
|
| 714 | return;
|
| 715 | }
|
| 716 |
|
| 717 | pinstance->reset_cmd = cmd;
|
| 718 | pinstance->ioa_reset_in_progress = 1;
|
| 719 | } else {
|
| 720 | pmcraid_info("reset is already in progress\n");
|
| 721 |
|
| 722 | if (pinstance->reset_cmd != cmd) {
|
| 723 | |
| 724 | * command will be completed by fail_outstanding_cmds
|
| 725 | * anyway
|
| 726 |
|
| 727 | pmcraid_err("cmd is pending but reset in progress\n");
|
| 728 | }
|
| 729 |
|
| 730 | |
| 731 | * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
|
| 732 | * causes fail_outstanding_commands not to return the command
|
| 733 | * block back to free pool
|
| 734 |
|
| 735 | if (cmd == pinstance->reset_cmd)
|
| 736 | cmd->cmd_done = pmcraid_ioa_reset;
|
| 737 | }
|
| 738 |
|
| 739 |
|
| 740 | if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
|
| 741 | pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
|
| 742 | pmcraid_notify_ioastate(pinstance,
|
| 743 | PMC_DEVICE_EVENT_RESET_START);
|
| 744 |
|
| 745 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
| 746 | scsi_block_requests(pinstance->host);
|
| 747 | pmcraid_reset_alert(cmd);
|
| 748 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 749 | }
|
| 750 |
|
| 751 | |
| 752 | * pmcraid_internal_done - completion routine for internally generated cmds
|
| 753 | *
|
| 754 | * @cmd: command that got response from IOA
|
| 755 | *
|
| 756 | * Return Value:
|
| 757 | * none
|
| 758 |
|
| 759 | static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
|
| 760 | {
|
| 761 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
|
| 762 | cmd->ioa_cb->ioarcb.cdb[0],
|
| 763 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
|
| 764 |
|
| 765 | |
| 766 | * response. Same will be indicated as part of cmd->completion_req
|
| 767 | * field. Response path needs to wake up any waiters waiting for cmd
|
| 768 | * completion if this flag is set.
|
| 769 |
|
| 770 | if (cmd->completion_req) {
|
| 771 | cmd->completion_req = 0;
|
| 772 | complete(&cmd->wait_for_completion);
|
| 773 | }
|
| 774 |
|
| 775 | |
| 776 | * no need to return the command block back to free pool until we are
|
| 777 | * required to do so (e.g once done with initialization).
|
| 778 |
|
| 779 | if (cmd->release) {
|
| 780 | cmd->release = 0;
|
| 781 | pmcraid_return_cmd(cmd);
|
| 782 | }
|
| 783 | }
|
| 784 |
|
| 785 | |
| 786 | * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
|
| 787 | *
|
| 788 | * @cmd: command that got response from IOA
|
| 789 | *
|
| 790 | * This routine is called after driver re-reads configuration table due to a
|
| 791 | * lost CCN. It returns the command block back to free pool and schedules
|
| 792 | * worker thread to add/delete devices into the system.
|
| 793 | *
|
| 794 | * Return Value:
|
| 795 | * none
|
| 796 |
|
| 797 | static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
|
| 798 | {
|
| 799 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
|
| 800 | cmd->ioa_cb->ioarcb.cdb[0],
|
| 801 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
|
| 802 |
|
| 803 | if (cmd->release) {
|
| 804 | cmd->release = 0;
|
| 805 | pmcraid_return_cmd(cmd);
|
| 806 | }
|
| 807 | pmcraid_info("scheduling worker for config table reinitialization\n");
|
| 808 | schedule_work(&cmd->drv_inst->worker_q);
|
| 809 | }
|
| 810 |
|
| 811 | |
| 812 | * pmcraid_erp_done - Process completion of SCSI error response from device
|
| 813 | * @cmd: pmcraid_command
|
| 814 | *
|
| 815 | * This function copies the sense buffer into the scsi_cmd struct and completes
|
| 816 | * scsi_cmd by calling scsi_done function.
|
| 817 | *
|
| 818 | * Return value:
|
| 819 | * none
|
| 820 |
|
| 821 | static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
|
| 822 | {
|
| 823 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
| 824 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 825 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
| 826 |
|
| 827 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
|
| 828 | scsi_cmd->result |= (DID_ERROR << 16);
|
| 829 | scmd_printk(KERN_INFO, scsi_cmd,
|
| 830 | "command CDB[0] = %x failed with IOASC: 0x%08X\n",
|
| 831 | cmd->ioa_cb->ioarcb.cdb[0], ioasc);
|
| 832 | }
|
| 833 |
|
| 834 | if (cmd->sense_buffer) {
|
| 835 | dma_unmap_single(&pinstance->pdev->dev, cmd->sense_buffer_dma,
|
| 836 | SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
|
| 837 | cmd->sense_buffer = NULL;
|
| 838 | cmd->sense_buffer_dma = 0;
|
| 839 | }
|
| 840 |
|
| 841 | scsi_dma_unmap(scsi_cmd);
|
| 842 | pmcraid_return_cmd(cmd);
|
| 843 | scsi_done(scsi_cmd);
|
| 844 | }
|
| 845 |
|
| 846 | |
| 847 | * _pmcraid_fire_command - sends an IOA command to adapter
|
| 848 | *
|
| 849 | * This function adds the given block into pending command list
|
| 850 | * and returns without waiting
|
| 851 | *
|
| 852 | * @cmd : command to be sent to the device
|
| 853 | *
|
| 854 | * Return Value
|
| 855 | * None
|
| 856 |
|
| 857 | static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
|
| 858 | {
|
| 859 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 860 | unsigned long lock_flags;
|
| 861 |
|
| 862 | |
| 863 | * writting IOARCB to ioarrin because IOA might complete the command
|
| 864 | * by the time we are about to add it to the list. Response handler
|
| 865 | * (isr/tasklet) looks for cmd block in the pending pending list.
|
| 866 |
|
| 867 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
|
| 868 | list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
|
| 869 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
|
| 870 | atomic_inc(&pinstance->outstanding_cmds);
|
| 871 |
|
| 872 |
|
| 873 | mb();
|
| 874 | iowrite32(le64_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr), pinstance->ioarrin);
|
| 875 | }
|
| 876 |
|
| 877 | |
| 878 | * pmcraid_send_cmd - fires a command to IOA
|
| 879 | *
|
| 880 | * This function also sets up timeout function, and command completion
|
| 881 | * function
|
| 882 | *
|
| 883 | * @cmd: pointer to the command block to be fired to IOA
|
| 884 | * @cmd_done: command completion function, called once IOA responds
|
| 885 | * @timeout: timeout to wait for this command completion
|
| 886 | * @timeout_func: timeout handler
|
| 887 | *
|
| 888 | * Return value
|
| 889 | * none
|
| 890 |
|
| 891 | static void pmcraid_send_cmd(
|
| 892 | struct pmcraid_cmd *cmd,
|
| 893 | void (*cmd_done) (struct pmcraid_cmd *),
|
| 894 | unsigned long timeout,
|
| 895 | void (*timeout_func) (struct timer_list *)
|
| 896 | )
|
| 897 | {
|
| 898 |
|
| 899 | cmd->cmd_done = cmd_done;
|
| 900 |
|
| 901 | if (timeout_func) {
|
| 902 |
|
| 903 | cmd->timer.expires = jiffies + timeout;
|
| 904 | cmd->timer.function = timeout_func;
|
| 905 | add_timer(&cmd->timer);
|
| 906 | }
|
| 907 |
|
| 908 |
|
| 909 | _pmcraid_fire_command(cmd);
|
| 910 | }
|
| 911 |
|
| 912 | |
| 913 | * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
|
| 914 | * @cmd: pointer to the command block used for sending IOA shutdown command
|
| 915 | *
|
| 916 | * Return value
|
| 917 | * None
|
| 918 |
|
| 919 | static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
|
| 920 | {
|
| 921 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 922 | unsigned long lock_flags;
|
| 923 |
|
| 924 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 925 | pmcraid_ioa_reset(cmd);
|
| 926 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 927 | }
|
| 928 |
|
| 929 | |
| 930 | * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
|
| 931 | *
|
| 932 | * @cmd: pointer to the command block used as part of reset sequence
|
| 933 | *
|
| 934 | * Return Value
|
| 935 | * None
|
| 936 |
|
| 937 | static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
|
| 938 | {
|
| 939 | pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
|
| 940 | cmd->ioa_cb->ioarcb.cdb[0],
|
| 941 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
|
| 942 |
|
| 943 | |
| 944 | * to IOA. Hence reinit the done function as well as timeout function
|
| 945 |
|
| 946 | pmcraid_reinit_cmdblk(cmd);
|
| 947 | cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
|
| 948 | cmd->ioa_cb->ioarcb.resource_handle =
|
| 949 | cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
| 950 | cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
|
| 951 | cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
|
| 952 |
|
| 953 |
|
| 954 | pmcraid_info("firing normal shutdown command (%d) to IOA\n",
|
| 955 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
|
| 956 |
|
| 957 | pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
|
| 958 |
|
| 959 | pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
|
| 960 | PMCRAID_SHUTDOWN_TIMEOUT,
|
| 961 | pmcraid_timeout_handler);
|
| 962 | }
|
| 963 |
|
| 964 | static void pmcraid_querycfg(struct pmcraid_cmd *);
|
| 965 | |
| 966 | * pmcraid_get_fwversion_done - completion function for get_fwversion
|
| 967 | *
|
| 968 | * @cmd: pointer to command block used to send INQUIRY command
|
| 969 | *
|
| 970 | * Return Value
|
| 971 | * none
|
| 972 |
|
| 973 | static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
|
| 974 | {
|
| 975 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 976 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
| 977 | unsigned long lock_flags;
|
| 978 |
|
| 979 | |
| 980 | * version is not known, it is not possible to interpret IOA config
|
| 981 | * table
|
| 982 |
|
| 983 | if (ioasc) {
|
| 984 | pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
|
| 985 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 986 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
| 987 | pmcraid_reset_alert(cmd);
|
| 988 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 989 | } else {
|
| 990 | pmcraid_querycfg(cmd);
|
| 991 | }
|
| 992 | }
|
| 993 |
|
| 994 | |
| 995 | * pmcraid_get_fwversion - reads firmware version information
|
| 996 | *
|
| 997 | * @cmd: pointer to command block used to send INQUIRY command
|
| 998 | *
|
| 999 | * Return Value
|
| 1000 | * none
|
| 1001 |
|
| 1002 | static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
|
| 1003 | {
|
| 1004 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
| 1005 | struct pmcraid_ioadl_desc *ioadl;
|
| 1006 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 1007 | u16 data_size = sizeof(struct pmcraid_inquiry_data);
|
| 1008 |
|
| 1009 | pmcraid_reinit_cmdblk(cmd);
|
| 1010 | ioarcb->request_type = REQ_TYPE_SCSI;
|
| 1011 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
| 1012 | ioarcb->cdb[0] = INQUIRY;
|
| 1013 | ioarcb->cdb[1] = 1;
|
| 1014 | ioarcb->cdb[2] = 0xD0;
|
| 1015 | ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
|
| 1016 | ioarcb->cdb[4] = data_size & 0xFF;
|
| 1017 |
|
| 1018 | |
| 1019 |
|
| 1020 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
| 1021 | offsetof(struct pmcraid_ioarcb,
|
| 1022 | add_data.u.ioadl[0]));
|
| 1023 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
| 1024 | ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
|
| 1025 |
|
| 1026 | ioarcb->request_flags0 |= NO_LINK_DESCS;
|
| 1027 | ioarcb->data_transfer_length = cpu_to_le32(data_size);
|
| 1028 | ioadl = &(ioarcb->add_data.u.ioadl[0]);
|
| 1029 | ioadl->flags = IOADL_FLAGS_LAST_DESC;
|
| 1030 | ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
|
| 1031 | ioadl->data_len = cpu_to_le32(data_size);
|
| 1032 |
|
| 1033 | pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
|
| 1034 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
|
| 1035 | }
|
| 1036 |
|
| 1037 | |
| 1038 | * pmcraid_identify_hrrq - registers host rrq buffers with IOA
|
| 1039 | * @cmd: pointer to command block to be used for identify hrrq
|
| 1040 | *
|
| 1041 | * Return Value
|
| 1042 | * none
|
| 1043 |
|
| 1044 | static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
|
| 1045 | {
|
| 1046 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 1047 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
| 1048 | int index = cmd->hrrq_index;
|
| 1049 | __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
|
| 1050 | __be32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
|
| 1051 | void (*done_function)(struct pmcraid_cmd *);
|
| 1052 |
|
| 1053 | pmcraid_reinit_cmdblk(cmd);
|
| 1054 | cmd->hrrq_index = index + 1;
|
| 1055 |
|
| 1056 | if (cmd->hrrq_index < pinstance->num_hrrq) {
|
| 1057 | done_function = pmcraid_identify_hrrq;
|
| 1058 | } else {
|
| 1059 | cmd->hrrq_index = 0;
|
| 1060 | done_function = pmcraid_get_fwversion;
|
| 1061 | }
|
| 1062 |
|
| 1063 |
|
| 1064 | ioarcb->request_type = REQ_TYPE_IOACMD;
|
| 1065 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
| 1066 |
|
| 1067 |
|
| 1068 | ioarcb->hrrq_id = index;
|
| 1069 | ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
|
| 1070 | ioarcb->cdb[1] = index;
|
| 1071 |
|
| 1072 | |
| 1073 | * (i.e cdb[2]=MSByte..cdb[9]=LSB.
|
| 1074 |
|
| 1075 | pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
|
| 1076 | hrrq_addr, ioarcb->ioarcb_bus_addr, index);
|
| 1077 |
|
| 1078 | memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
|
| 1079 | memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
|
| 1080 |
|
| 1081 | |
| 1082 | * Note that this gets called even during reset from SCSI mid-layer
|
| 1083 | * or tasklet
|
| 1084 |
|
| 1085 | pmcraid_send_cmd(cmd, done_function,
|
| 1086 | PMCRAID_INTERNAL_TIMEOUT,
|
| 1087 | pmcraid_timeout_handler);
|
| 1088 | }
|
| 1089 |
|
| 1090 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
|
| 1091 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
|
| 1092 |
|
| 1093 | |
| 1094 | * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
|
| 1095 | *
|
| 1096 | * @cmd: initialized command block pointer
|
| 1097 | *
|
| 1098 | * Return Value
|
| 1099 | * none
|
| 1100 |
|
| 1101 | static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
|
| 1102 | {
|
| 1103 | if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
|
| 1104 | atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
|
| 1105 | else
|
| 1106 | atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
|
| 1107 |
|
| 1108 | pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
|
| 1109 | }
|
| 1110 |
|
| 1111 | |
| 1112 | * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
|
| 1113 | *
|
| 1114 | * @pinstance: pointer to adapter instance structure
|
| 1115 | * @type: HCAM type
|
| 1116 | *
|
| 1117 | * Return Value
|
| 1118 | * pointer to initialized pmcraid_cmd structure or NULL
|
| 1119 |
|
| 1120 | static struct pmcraid_cmd *pmcraid_init_hcam
|
| 1121 | (
|
| 1122 | struct pmcraid_instance *pinstance,
|
| 1123 | u8 type
|
| 1124 | )
|
| 1125 | {
|
| 1126 | struct pmcraid_cmd *cmd;
|
| 1127 | struct pmcraid_ioarcb *ioarcb;
|
| 1128 | struct pmcraid_ioadl_desc *ioadl;
|
| 1129 | struct pmcraid_hostrcb *hcam;
|
| 1130 | void (*cmd_done) (struct pmcraid_cmd *);
|
| 1131 | dma_addr_t dma;
|
| 1132 | int rcb_size;
|
| 1133 |
|
| 1134 | cmd = pmcraid_get_free_cmd(pinstance);
|
| 1135 |
|
| 1136 | if (!cmd) {
|
| 1137 | pmcraid_err("no free command blocks for hcam\n");
|
| 1138 | return cmd;
|
| 1139 | }
|
| 1140 |
|
| 1141 | if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
|
| 1142 | rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
|
| 1143 | cmd_done = pmcraid_process_ccn;
|
| 1144 | dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
|
| 1145 | hcam = &pinstance->ccn;
|
| 1146 | } else {
|
| 1147 | rcb_size = sizeof(struct pmcraid_hcam_ldn);
|
| 1148 | cmd_done = pmcraid_process_ldn;
|
| 1149 | dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
|
| 1150 | hcam = &pinstance->ldn;
|
| 1151 | }
|
| 1152 |
|
| 1153 |
|
| 1154 | hcam->cmd = cmd;
|
| 1155 |
|
| 1156 | ioarcb = &cmd->ioa_cb->ioarcb;
|
| 1157 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
| 1158 | offsetof(struct pmcraid_ioarcb,
|
| 1159 | add_data.u.ioadl[0]));
|
| 1160 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
| 1161 | ioadl = ioarcb->add_data.u.ioadl;
|
| 1162 |
|
| 1163 |
|
| 1164 | ioarcb->request_type = REQ_TYPE_HCAM;
|
| 1165 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
| 1166 | ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
|
| 1167 | ioarcb->cdb[1] = type;
|
| 1168 | ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
|
| 1169 | ioarcb->cdb[8] = (rcb_size) & 0xFF;
|
| 1170 |
|
| 1171 | ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
|
| 1172 |
|
| 1173 | ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
|
| 1174 | ioadl[0].data_len = cpu_to_le32(rcb_size);
|
| 1175 | ioadl[0].address = cpu_to_le64(dma);
|
| 1176 |
|
| 1177 | cmd->cmd_done = cmd_done;
|
| 1178 | return cmd;
|
| 1179 | }
|
| 1180 |
|
| 1181 | |
| 1182 | * pmcraid_send_hcam - Send an HCAM to IOA
|
| 1183 | * @pinstance: ioa config struct
|
| 1184 | * @type: HCAM type
|
| 1185 | *
|
| 1186 | * This function will send a Host Controlled Async command to IOA.
|
| 1187 | *
|
| 1188 | * Return value:
|
| 1189 | * none
|
| 1190 |
|
| 1191 | static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
|
| 1192 | {
|
| 1193 | struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
|
| 1194 | pmcraid_send_hcam_cmd(cmd);
|
| 1195 | }
|
| 1196 |
|
| 1197 |
|
| 1198 | |
| 1199 | * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
|
| 1200 | *
|
| 1201 | * @cmd: pointer to cmd that is used as cancelling command
|
| 1202 | * @cmd_to_cancel: pointer to the command that needs to be cancelled
|
| 1203 |
|
| 1204 | static void pmcraid_prepare_cancel_cmd(
|
| 1205 | struct pmcraid_cmd *cmd,
|
| 1206 | struct pmcraid_cmd *cmd_to_cancel
|
| 1207 | )
|
| 1208 | {
|
| 1209 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
| 1210 | __be64 ioarcb_addr;
|
| 1211 |
|
| 1212 | |
| 1213 | * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
|
| 1214 | * IOARCB address are not masked.
|
| 1215 |
|
| 1216 | ioarcb_addr = cpu_to_be64(le64_to_cpu(cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr));
|
| 1217 |
|
| 1218 | |
| 1219 | * sent.
|
| 1220 |
|
| 1221 | ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
|
| 1222 | ioarcb->request_type = REQ_TYPE_IOACMD;
|
| 1223 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
|
| 1224 | ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
|
| 1225 |
|
| 1226 | memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
|
| 1227 | }
|
| 1228 |
|
| 1229 | |
| 1230 | * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
|
| 1231 | *
|
| 1232 | * @cmd: command to be used as cancelling command
|
| 1233 | * @type: HCAM type
|
| 1234 | * @cmd_done: op done function for the cancelling command
|
| 1235 |
|
| 1236 | static void pmcraid_cancel_hcam(
|
| 1237 | struct pmcraid_cmd *cmd,
|
| 1238 | u8 type,
|
| 1239 | void (*cmd_done) (struct pmcraid_cmd *)
|
| 1240 | )
|
| 1241 | {
|
| 1242 | struct pmcraid_instance *pinstance;
|
| 1243 | struct pmcraid_hostrcb *hcam;
|
| 1244 |
|
| 1245 | pinstance = cmd->drv_inst;
|
| 1246 | hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
|
| 1247 | &pinstance->ldn : &pinstance->ccn;
|
| 1248 |
|
| 1249 | |
| 1250 | * currently not pending with IOA, we would have hcam->cmd as non-null
|
| 1251 |
|
| 1252 | if (hcam->cmd == NULL)
|
| 1253 | return;
|
| 1254 |
|
| 1255 | pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
|
| 1256 |
|
| 1257 | |
| 1258 | * schedule queuecommand while we are doing this
|
| 1259 |
|
| 1260 | pmcraid_send_cmd(cmd, cmd_done,
|
| 1261 | PMCRAID_INTERNAL_TIMEOUT,
|
| 1262 | pmcraid_timeout_handler);
|
| 1263 | }
|
| 1264 |
|
| 1265 | |
| 1266 | * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
|
| 1267 | *
|
| 1268 | * @cmd: command block to be used for cancelling the HCAM
|
| 1269 |
|
| 1270 | static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
|
| 1271 | {
|
| 1272 | pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
|
| 1273 | cmd->ioa_cb->ioarcb.cdb[0],
|
| 1274 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
|
| 1275 |
|
| 1276 | pmcraid_reinit_cmdblk(cmd);
|
| 1277 |
|
| 1278 | pmcraid_cancel_hcam(cmd,
|
| 1279 | PMCRAID_HCAM_CODE_CONFIG_CHANGE,
|
| 1280 | pmcraid_ioa_shutdown);
|
| 1281 | }
|
| 1282 |
|
| 1283 | |
| 1284 | * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
|
| 1285 | *
|
| 1286 | * @cmd: command block to be used for cancelling the HCAM
|
| 1287 |
|
| 1288 | static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
|
| 1289 | {
|
| 1290 | pmcraid_cancel_hcam(cmd,
|
| 1291 | PMCRAID_HCAM_CODE_LOG_DATA,
|
| 1292 | pmcraid_cancel_ccn);
|
| 1293 | }
|
| 1294 |
|
| 1295 | |
| 1296 | * pmcraid_expose_resource - check if the resource can be exposed to OS
|
| 1297 | *
|
| 1298 | * @fw_version: firmware version code
|
| 1299 | * @cfgte: pointer to configuration table entry of the resource
|
| 1300 | *
|
| 1301 | * Return value:
|
| 1302 | * true if resource can be added to midlayer, false(0) otherwise
|
| 1303 |
|
| 1304 | static int pmcraid_expose_resource(u16 fw_version,
|
| 1305 | struct pmcraid_config_table_entry *cfgte)
|
| 1306 | {
|
| 1307 | int retval = 0;
|
| 1308 |
|
| 1309 | if (cfgte->resource_type == RES_TYPE_VSET) {
|
| 1310 | if (fw_version <= PMCRAID_FW_VERSION_1)
|
| 1311 | retval = ((cfgte->unique_flags1 & 0x80) == 0);
|
| 1312 | else
|
| 1313 | retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
|
| 1314 | (cfgte->unique_flags1 & 0x80) == 0);
|
| 1315 |
|
| 1316 | } else if (cfgte->resource_type == RES_TYPE_GSCSI)
|
| 1317 | retval = (RES_BUS(cfgte->resource_address) !=
|
| 1318 | PMCRAID_VIRTUAL_ENCL_BUS_ID);
|
| 1319 | return retval;
|
| 1320 | }
|
| 1321 |
|
| 1322 |
|
| 1323 | enum {
|
| 1324 | PMCRAID_AEN_ATTR_UNSPEC,
|
| 1325 | PMCRAID_AEN_ATTR_EVENT,
|
| 1326 | __PMCRAID_AEN_ATTR_MAX,
|
| 1327 | };
|
| 1328 | #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
|
| 1329 |
|
| 1330 |
|
| 1331 | enum {
|
| 1332 | PMCRAID_AEN_CMD_UNSPEC,
|
| 1333 | PMCRAID_AEN_CMD_EVENT,
|
| 1334 | __PMCRAID_AEN_CMD_MAX,
|
| 1335 | };
|
| 1336 | #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
|
| 1337 |
|
| 1338 | static struct genl_multicast_group pmcraid_mcgrps[] = {
|
| 1339 | { .name = "events", },
|
| 1340 | };
|
| 1341 |
|
| 1342 | static struct genl_family pmcraid_event_family __ro_after_init = {
|
| 1343 | .module = THIS_MODULE,
|
| 1344 | .name = "pmcraid",
|
| 1345 | .version = 1,
|
| 1346 | .maxattr = PMCRAID_AEN_ATTR_MAX,
|
| 1347 | .mcgrps = pmcraid_mcgrps,
|
| 1348 | .n_mcgrps = ARRAY_SIZE(pmcraid_mcgrps),
|
| 1349 | };
|
| 1350 |
|
| 1351 | |
| 1352 | * pmcraid_netlink_init - registers pmcraid_event_family
|
| 1353 | *
|
| 1354 | * Return value:
|
| 1355 | * 0 if the pmcraid_event_family is successfully registered
|
| 1356 | * with netlink generic, non-zero otherwise
|
| 1357 |
|
| 1358 | static int __init pmcraid_netlink_init(void)
|
| 1359 | {
|
| 1360 | int result;
|
| 1361 |
|
| 1362 | result = genl_register_family(&pmcraid_event_family);
|
| 1363 |
|
| 1364 | if (result)
|
| 1365 | return result;
|
| 1366 |
|
| 1367 | pmcraid_info("registered NETLINK GENERIC group: %d\n",
|
| 1368 | pmcraid_event_family.id);
|
| 1369 |
|
| 1370 | return result;
|
| 1371 | }
|
| 1372 |
|
| 1373 | |
| 1374 | * pmcraid_netlink_release - unregisters pmcraid_event_family
|
| 1375 | *
|
| 1376 | * Return value:
|
| 1377 | * none
|
| 1378 |
|
| 1379 | static void pmcraid_netlink_release(void)
|
| 1380 | {
|
| 1381 | genl_unregister_family(&pmcraid_event_family);
|
| 1382 | }
|
| 1383 |
|
| 1384 | |
| 1385 | * pmcraid_notify_aen - sends event msg to user space application
|
| 1386 | * @pinstance: pointer to adapter instance structure
|
| 1387 | *
|
| 1388 | * Return value:
|
| 1389 | * 0 if success, error value in case of any failure.
|
| 1390 |
|
| 1391 | static int pmcraid_notify_aen(
|
| 1392 | struct pmcraid_instance *pinstance,
|
| 1393 | struct pmcraid_aen_msg *aen_msg,
|
| 1394 | u32 data_size)
|
| 1395 | {
|
| 1396 | struct sk_buff *skb;
|
| 1397 | void *msg_header;
|
| 1398 | u32 total_size, nla_genl_hdr_total_size;
|
| 1399 | int result;
|
| 1400 |
|
| 1401 | aen_msg->hostno = (pinstance->host->unique_id << 16 |
|
| 1402 | MINOR(pinstance->cdev.dev));
|
| 1403 | aen_msg->length = data_size;
|
| 1404 |
|
| 1405 | data_size += sizeof(*aen_msg);
|
| 1406 |
|
| 1407 | total_size = nla_total_size(data_size);
|
| 1408 |
|
| 1409 | nla_genl_hdr_total_size =
|
| 1410 | (total_size + (GENL_HDRLEN +
|
| 1411 | ((struct genl_family *)&pmcraid_event_family)->hdrsize)
|
| 1412 | + NLMSG_HDRLEN);
|
| 1413 | skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
|
| 1414 |
|
| 1415 |
|
| 1416 | if (!skb) {
|
| 1417 | pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
|
| 1418 | total_size);
|
| 1419 | return -ENOMEM;
|
| 1420 | }
|
| 1421 |
|
| 1422 |
|
| 1423 | msg_header = genlmsg_put(skb, 0, 0,
|
| 1424 | &pmcraid_event_family, 0,
|
| 1425 | PMCRAID_AEN_CMD_EVENT);
|
| 1426 | if (!msg_header) {
|
| 1427 | pmcraid_err("failed to copy command details\n");
|
| 1428 | nlmsg_free(skb);
|
| 1429 | return -ENOMEM;
|
| 1430 | }
|
| 1431 |
|
| 1432 | result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
|
| 1433 |
|
| 1434 | if (result) {
|
| 1435 | pmcraid_err("failed to copy AEN attribute data\n");
|
| 1436 | nlmsg_free(skb);
|
| 1437 | return -EINVAL;
|
| 1438 | }
|
| 1439 |
|
| 1440 |
|
| 1441 | genlmsg_end(skb, msg_header);
|
| 1442 |
|
| 1443 | result = genlmsg_multicast(&pmcraid_event_family, skb,
|
| 1444 | 0, 0, GFP_ATOMIC);
|
| 1445 |
|
| 1446 | |
| 1447 | * value.
|
| 1448 |
|
| 1449 | if (result)
|
| 1450 | pmcraid_info("error (%x) sending aen event message\n", result);
|
| 1451 | return result;
|
| 1452 | }
|
| 1453 |
|
| 1454 | |
| 1455 | * pmcraid_notify_ccn - notifies about CCN event msg to user space
|
| 1456 | * @pinstance: pointer adapter instance structure
|
| 1457 | *
|
| 1458 | * Return value:
|
| 1459 | * 0 if success, error value in case of any failure
|
| 1460 |
|
| 1461 | static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
|
| 1462 | {
|
| 1463 | return pmcraid_notify_aen(pinstance,
|
| 1464 | pinstance->ccn.msg,
|
| 1465 | le32_to_cpu(pinstance->ccn.hcam->data_len) +
|
| 1466 | sizeof(struct pmcraid_hcam_hdr));
|
| 1467 | }
|
| 1468 |
|
| 1469 | |
| 1470 | * pmcraid_notify_ldn - notifies about CCN event msg to user space
|
| 1471 | * @pinstance: pointer adapter instance structure
|
| 1472 | *
|
| 1473 | * Return value:
|
| 1474 | * 0 if success, error value in case of any failure
|
| 1475 |
|
| 1476 | static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
|
| 1477 | {
|
| 1478 | return pmcraid_notify_aen(pinstance,
|
| 1479 | pinstance->ldn.msg,
|
| 1480 | le32_to_cpu(pinstance->ldn.hcam->data_len) +
|
| 1481 | sizeof(struct pmcraid_hcam_hdr));
|
| 1482 | }
|
| 1483 |
|
| 1484 | |
| 1485 | * pmcraid_notify_ioastate - sends IOA state event msg to user space
|
| 1486 | * @pinstance: pointer adapter instance structure
|
| 1487 | * @evt: controller state event to be sent
|
| 1488 | *
|
| 1489 | * Return value:
|
| 1490 | * 0 if success, error value in case of any failure
|
| 1491 |
|
| 1492 | static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
|
| 1493 | {
|
| 1494 | pinstance->scn.ioa_state = evt;
|
| 1495 | pmcraid_notify_aen(pinstance,
|
| 1496 | &pinstance->scn.msg,
|
| 1497 | sizeof(u32));
|
| 1498 | }
|
| 1499 |
|
| 1500 | |
| 1501 | * pmcraid_handle_config_change - Handle a config change from the adapter
|
| 1502 | * @pinstance: pointer to per adapter instance structure
|
| 1503 | *
|
| 1504 | * Return value:
|
| 1505 | * none
|
| 1506 |
|
| 1507 |
|
| 1508 | static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
|
| 1509 | {
|
| 1510 | struct pmcraid_config_table_entry *cfg_entry;
|
| 1511 | struct pmcraid_hcam_ccn *ccn_hcam;
|
| 1512 | struct pmcraid_cmd *cmd;
|
| 1513 | struct pmcraid_cmd *cfgcmd;
|
| 1514 | struct pmcraid_resource_entry *res = NULL;
|
| 1515 | unsigned long lock_flags;
|
| 1516 | unsigned long host_lock_flags;
|
| 1517 | u32 new_entry = 1;
|
| 1518 | u32 hidden_entry = 0;
|
| 1519 | u16 fw_version;
|
| 1520 | int rc;
|
| 1521 |
|
| 1522 | ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
|
| 1523 | cfg_entry = &ccn_hcam->cfg_entry;
|
| 1524 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
|
| 1525 |
|
| 1526 | pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
|
| 1527 | res: %x:%x:%x:%x\n",
|
| 1528 | le32_to_cpu(pinstance->ccn.hcam->ilid),
|
| 1529 | pinstance->ccn.hcam->op_code,
|
| 1530 | (le32_to_cpu(pinstance->ccn.hcam->timestamp1) |
|
| 1531 | ((le32_to_cpu(pinstance->ccn.hcam->timestamp2) & 0xffffffffLL) << 32)),
|
| 1532 | pinstance->ccn.hcam->notification_type,
|
| 1533 | pinstance->ccn.hcam->notification_lost,
|
| 1534 | pinstance->ccn.hcam->flags,
|
| 1535 | pinstance->host->unique_id,
|
| 1536 | RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
|
| 1537 | (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
|
| 1538 | RES_BUS(cfg_entry->resource_address)),
|
| 1539 | RES_IS_VSET(*cfg_entry) ?
|
| 1540 | (fw_version <= PMCRAID_FW_VERSION_1 ?
|
| 1541 | cfg_entry->unique_flags1 :
|
| 1542 | le16_to_cpu(cfg_entry->array_id) & 0xFF) :
|
| 1543 | RES_TARGET(cfg_entry->resource_address),
|
| 1544 | RES_LUN(cfg_entry->resource_address));
|
| 1545 |
|
| 1546 |
|
| 1547 |
|
| 1548 | if (pinstance->ccn.hcam->notification_lost) {
|
| 1549 | cfgcmd = pmcraid_get_free_cmd(pinstance);
|
| 1550 | if (cfgcmd) {
|
| 1551 | pmcraid_info("lost CCN, reading config table\b");
|
| 1552 | pinstance->reinit_cfg_table = 1;
|
| 1553 | pmcraid_querycfg(cfgcmd);
|
| 1554 | } else {
|
| 1555 | pmcraid_err("lost CCN, no free cmd for querycfg\n");
|
| 1556 | }
|
| 1557 | goto out_notify_apps;
|
| 1558 | }
|
| 1559 |
|
| 1560 | |
| 1561 | * applications and return. If this notification is about hiding a VSET
|
| 1562 | * resource, check if it was exposed already.
|
| 1563 |
|
| 1564 | if (pinstance->ccn.hcam->notification_type ==
|
| 1565 | NOTIFICATION_TYPE_ENTRY_CHANGED &&
|
| 1566 | cfg_entry->resource_type == RES_TYPE_VSET) {
|
| 1567 | hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
|
| 1568 | } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
|
| 1569 | goto out_notify_apps;
|
| 1570 | }
|
| 1571 |
|
| 1572 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
|
| 1573 | list_for_each_entry(res, &pinstance->used_res_q, queue) {
|
| 1574 | rc = memcmp(&res->cfg_entry.resource_address,
|
| 1575 | &cfg_entry->resource_address,
|
| 1576 | sizeof(cfg_entry->resource_address));
|
| 1577 | if (!rc) {
|
| 1578 | new_entry = 0;
|
| 1579 | break;
|
| 1580 | }
|
| 1581 | }
|
| 1582 |
|
| 1583 | if (new_entry) {
|
| 1584 |
|
| 1585 | if (hidden_entry) {
|
| 1586 | spin_unlock_irqrestore(&pinstance->resource_lock,
|
| 1587 | lock_flags);
|
| 1588 | goto out_notify_apps;
|
| 1589 | }
|
| 1590 |
|
| 1591 | |
| 1592 | * manage, do not notify the applications about the CCN. Just
|
| 1593 | * ignore this notifications and re-register the same HCAM
|
| 1594 |
|
| 1595 | if (list_empty(&pinstance->free_res_q)) {
|
| 1596 | spin_unlock_irqrestore(&pinstance->resource_lock,
|
| 1597 | lock_flags);
|
| 1598 | pmcraid_err("too many resources attached\n");
|
| 1599 | spin_lock_irqsave(pinstance->host->host_lock,
|
| 1600 | host_lock_flags);
|
| 1601 | pmcraid_send_hcam(pinstance,
|
| 1602 | PMCRAID_HCAM_CODE_CONFIG_CHANGE);
|
| 1603 | spin_unlock_irqrestore(pinstance->host->host_lock,
|
| 1604 | host_lock_flags);
|
| 1605 | return;
|
| 1606 | }
|
| 1607 |
|
| 1608 | res = list_entry(pinstance->free_res_q.next,
|
| 1609 | struct pmcraid_resource_entry, queue);
|
| 1610 |
|
| 1611 | list_del(&res->queue);
|
| 1612 | res->scsi_dev = NULL;
|
| 1613 | res->reset_progress = 0;
|
| 1614 | list_add_tail(&res->queue, &pinstance->used_res_q);
|
| 1615 | }
|
| 1616 |
|
| 1617 | memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
|
| 1618 |
|
| 1619 | if (pinstance->ccn.hcam->notification_type ==
|
| 1620 | NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
|
| 1621 | if (res->scsi_dev) {
|
| 1622 | if (fw_version <= PMCRAID_FW_VERSION_1)
|
| 1623 | res->cfg_entry.unique_flags1 &= 0x7F;
|
| 1624 | else
|
| 1625 | res->cfg_entry.array_id &= cpu_to_le16(0xFF);
|
| 1626 | res->change_detected = RES_CHANGE_DEL;
|
| 1627 | res->cfg_entry.resource_handle =
|
| 1628 | PMCRAID_INVALID_RES_HANDLE;
|
| 1629 | schedule_work(&pinstance->worker_q);
|
| 1630 | } else {
|
| 1631 |
|
| 1632 | list_move_tail(&res->queue, &pinstance->free_res_q);
|
| 1633 | }
|
| 1634 | } else if (!res->scsi_dev) {
|
| 1635 | res->change_detected = RES_CHANGE_ADD;
|
| 1636 | schedule_work(&pinstance->worker_q);
|
| 1637 | }
|
| 1638 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
|
| 1639 |
|
| 1640 | out_notify_apps:
|
| 1641 |
|
| 1642 |
|
| 1643 | if (!pmcraid_disable_aen)
|
| 1644 | pmcraid_notify_ccn(pinstance);
|
| 1645 |
|
| 1646 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
|
| 1647 | if (cmd)
|
| 1648 | pmcraid_send_hcam_cmd(cmd);
|
| 1649 | }
|
| 1650 |
|
| 1651 | |
| 1652 | * pmcraid_get_error_info - return error string for an ioasc
|
| 1653 | * @ioasc: ioasc code
|
| 1654 | * Return Value
|
| 1655 | * none
|
| 1656 |
|
| 1657 | static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
|
| 1658 | {
|
| 1659 | int i;
|
| 1660 | for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
|
| 1661 | if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
|
| 1662 | return &pmcraid_ioasc_error_table[i];
|
| 1663 | }
|
| 1664 | return NULL;
|
| 1665 | }
|
| 1666 |
|
| 1667 | |
| 1668 | * pmcraid_ioasc_logger - log IOASC information based user-settings
|
| 1669 | * @ioasc: ioasc code
|
| 1670 | * @cmd: pointer to command that resulted in 'ioasc'
|
| 1671 |
|
| 1672 | static void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
|
| 1673 | {
|
| 1674 | struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
|
| 1675 |
|
| 1676 | if (error_info == NULL ||
|
| 1677 | cmd->drv_inst->current_log_level < error_info->log_level)
|
| 1678 | return;
|
| 1679 |
|
| 1680 |
|
| 1681 | pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
|
| 1682 | cmd->ioa_cb->ioarcb.cdb[0],
|
| 1683 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
|
| 1684 | ioasc, error_info->error_string);
|
| 1685 | }
|
| 1686 |
|
| 1687 | |
| 1688 | * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
|
| 1689 | *
|
| 1690 | * @pinstance: pointer to per adapter instance structure
|
| 1691 | *
|
| 1692 | * Return value:
|
| 1693 | * none
|
| 1694 |
|
| 1695 | static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
|
| 1696 | {
|
| 1697 | struct pmcraid_hcam_ldn *hcam_ldn;
|
| 1698 | u32 ioasc;
|
| 1699 |
|
| 1700 | hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
|
| 1701 |
|
| 1702 | pmcraid_info
|
| 1703 | ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
|
| 1704 | pinstance->ldn.hcam->ilid,
|
| 1705 | pinstance->ldn.hcam->op_code,
|
| 1706 | pinstance->ldn.hcam->notification_type,
|
| 1707 | pinstance->ldn.hcam->notification_lost,
|
| 1708 | pinstance->ldn.hcam->flags,
|
| 1709 | pinstance->ldn.hcam->overlay_id);
|
| 1710 |
|
| 1711 |
|
| 1712 | if (pinstance->ldn.hcam->notification_type !=
|
| 1713 | NOTIFICATION_TYPE_ERROR_LOG)
|
| 1714 | return;
|
| 1715 |
|
| 1716 | if (pinstance->ldn.hcam->notification_lost ==
|
| 1717 | HOSTRCB_NOTIFICATIONS_LOST)
|
| 1718 | dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
|
| 1719 |
|
| 1720 | ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
|
| 1721 |
|
| 1722 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
|
| 1723 | ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
|
| 1724 | dev_info(&pinstance->pdev->dev,
|
| 1725 | "UnitAttention due to IOA Bus Reset\n");
|
| 1726 | scsi_report_bus_reset(
|
| 1727 | pinstance->host,
|
| 1728 | RES_BUS(hcam_ldn->error_log.fd_ra));
|
| 1729 | }
|
| 1730 |
|
| 1731 | return;
|
| 1732 | }
|
| 1733 |
|
| 1734 | |
| 1735 | * pmcraid_process_ccn - Op done function for a CCN.
|
| 1736 | * @cmd: pointer to command struct
|
| 1737 | *
|
| 1738 | * This function is the op done function for a configuration
|
| 1739 | * change notification
|
| 1740 | *
|
| 1741 | * Return value:
|
| 1742 | * none
|
| 1743 |
|
| 1744 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
|
| 1745 | {
|
| 1746 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 1747 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
| 1748 | unsigned long lock_flags;
|
| 1749 |
|
| 1750 | pinstance->ccn.cmd = NULL;
|
| 1751 | pmcraid_return_cmd(cmd);
|
| 1752 |
|
| 1753 | |
| 1754 | * with IOA, or IOA bringdown sequence is in progress, no need to
|
| 1755 | * re-register the hcam
|
| 1756 |
|
| 1757 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
|
| 1758 | atomic_read(&pinstance->ccn.ignore) == 1) {
|
| 1759 | return;
|
| 1760 | } else if (ioasc) {
|
| 1761 | dev_info(&pinstance->pdev->dev,
|
| 1762 | "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
|
| 1763 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 1764 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
|
| 1765 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 1766 | } else {
|
| 1767 | pmcraid_handle_config_change(pinstance);
|
| 1768 | }
|
| 1769 | }
|
| 1770 |
|
| 1771 | static void pmcraid_initiate_reset(struct pmcraid_instance *);
|
| 1772 | static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
|
| 1773 | |
| 1774 | * pmcraid_process_ldn - op done function for an LDN
|
| 1775 | * @cmd: pointer to command block
|
| 1776 | *
|
| 1777 | * Return value
|
| 1778 | * none
|
| 1779 |
|
| 1780 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
|
| 1781 | {
|
| 1782 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 1783 | struct pmcraid_hcam_ldn *ldn_hcam =
|
| 1784 | (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
|
| 1785 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
| 1786 | u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
|
| 1787 | unsigned long lock_flags;
|
| 1788 |
|
| 1789 |
|
| 1790 | pinstance->ldn.cmd = NULL;
|
| 1791 | pmcraid_return_cmd(cmd);
|
| 1792 |
|
| 1793 | |
| 1794 | * with IOA, no need to re-register the hcam as reset engine will do it
|
| 1795 | * once reset sequence is complete
|
| 1796 |
|
| 1797 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
|
| 1798 | atomic_read(&pinstance->ccn.ignore) == 1) {
|
| 1799 | return;
|
| 1800 | } else if (!ioasc) {
|
| 1801 | pmcraid_handle_error_log(pinstance);
|
| 1802 | if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
|
| 1803 | spin_lock_irqsave(pinstance->host->host_lock,
|
| 1804 | lock_flags);
|
| 1805 | pmcraid_initiate_reset(pinstance);
|
| 1806 | spin_unlock_irqrestore(pinstance->host->host_lock,
|
| 1807 | lock_flags);
|
| 1808 | return;
|
| 1809 | }
|
| 1810 | if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
|
| 1811 | pinstance->timestamp_error = 1;
|
| 1812 | pmcraid_set_timestamp(cmd);
|
| 1813 | }
|
| 1814 | } else {
|
| 1815 | dev_info(&pinstance->pdev->dev,
|
| 1816 | "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
|
| 1817 | }
|
| 1818 |
|
| 1819 | if (!pmcraid_disable_aen)
|
| 1820 | pmcraid_notify_ldn(pinstance);
|
| 1821 |
|
| 1822 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
|
| 1823 | if (cmd)
|
| 1824 | pmcraid_send_hcam_cmd(cmd);
|
| 1825 | }
|
| 1826 |
|
| 1827 | |
| 1828 | * pmcraid_register_hcams - register HCAMs for CCN and LDN
|
| 1829 | *
|
| 1830 | * @pinstance: pointer per adapter instance structure
|
| 1831 | *
|
| 1832 | * Return Value
|
| 1833 | * none
|
| 1834 |
|
| 1835 | static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
|
| 1836 | {
|
| 1837 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
|
| 1838 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
|
| 1839 | }
|
| 1840 |
|
| 1841 | |
| 1842 | * pmcraid_unregister_hcams - cancel HCAMs registered already
|
| 1843 | * @cmd: pointer to command used as part of reset sequence
|
| 1844 |
|
| 1845 | static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
|
| 1846 | {
|
| 1847 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 1848 |
|
| 1849 | |
| 1850 | * handling hcam response though it is not necessary. In order to
|
| 1851 | * prevent this, set 'ignore', so that bring-down sequence doesn't
|
| 1852 | * re-send any more hcams
|
| 1853 |
|
| 1854 | atomic_set(&pinstance->ccn.ignore, 1);
|
| 1855 | atomic_set(&pinstance->ldn.ignore, 1);
|
| 1856 |
|
| 1857 | |
| 1858 | * start the reset sequence. Reset will be triggered even in case
|
| 1859 | * IOA unit_check.
|
| 1860 |
|
| 1861 | if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
|
| 1862 | pinstance->ioa_unit_check) {
|
| 1863 | pinstance->force_ioa_reset = 0;
|
| 1864 | pinstance->ioa_unit_check = 0;
|
| 1865 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
| 1866 | pmcraid_reset_alert(cmd);
|
| 1867 | return;
|
| 1868 | }
|
| 1869 |
|
| 1870 | |
| 1871 | * one after the other. So CCN cancellation will be triggered by
|
| 1872 | * pmcraid_cancel_ldn itself.
|
| 1873 |
|
| 1874 | pmcraid_cancel_ldn(cmd);
|
| 1875 | }
|
| 1876 |
|
| 1877 | static void pmcraid_reinit_buffers(struct pmcraid_instance *);
|
| 1878 |
|
| 1879 | |
| 1880 | * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
|
| 1881 | * @pinstance: pointer to adapter instance structure
|
| 1882 | * Return Value
|
| 1883 | * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
|
| 1884 |
|
| 1885 | static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
|
| 1886 | {
|
| 1887 | u32 intrs;
|
| 1888 |
|
| 1889 | pmcraid_reinit_buffers(pinstance);
|
| 1890 | intrs = pmcraid_read_interrupts(pinstance);
|
| 1891 |
|
| 1892 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
|
| 1893 |
|
| 1894 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
|
| 1895 | if (!pinstance->interrupt_mode) {
|
| 1896 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
|
| 1897 | pinstance->int_regs.
|
| 1898 | ioa_host_interrupt_mask_reg);
|
| 1899 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
|
| 1900 | pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
| 1901 | }
|
| 1902 | return 1;
|
| 1903 | } else {
|
| 1904 | return 0;
|
| 1905 | }
|
| 1906 | }
|
| 1907 |
|
| 1908 | |
| 1909 | * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
|
| 1910 | * @cmd : pointer to reset command block
|
| 1911 | *
|
| 1912 | * Return Value
|
| 1913 | * none
|
| 1914 |
|
| 1915 | static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
|
| 1916 | {
|
| 1917 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 1918 | u32 int_reg;
|
| 1919 | u32 doorbell;
|
| 1920 |
|
| 1921 | |
| 1922 | * set so tasklet would execute next reset task. The timeout handler
|
| 1923 | * would re-initiate a reset
|
| 1924 |
|
| 1925 | cmd->cmd_done = pmcraid_ioa_reset;
|
| 1926 | cmd->timer.expires = jiffies +
|
| 1927 | msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
|
| 1928 | cmd->timer.function = pmcraid_timeout_handler;
|
| 1929 |
|
| 1930 | if (!timer_pending(&cmd->timer))
|
| 1931 | add_timer(&cmd->timer);
|
| 1932 |
|
| 1933 | |
| 1934 | * operational state
|
| 1935 |
|
| 1936 | doorbell = DOORBELL_RUNTIME_RESET |
|
| 1937 | DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
|
| 1938 |
|
| 1939 | |
| 1940 | * MSIX Doorbell to indicate the interrupt mode
|
| 1941 |
|
| 1942 | if (pinstance->interrupt_mode) {
|
| 1943 | iowrite32(DOORBELL_INTR_MODE_MSIX,
|
| 1944 | pinstance->int_regs.host_ioa_interrupt_reg);
|
| 1945 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
| 1946 | }
|
| 1947 |
|
| 1948 | iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
|
| 1949 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
| 1950 | int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
|
| 1951 |
|
| 1952 | pmcraid_info("Waiting for IOA to become operational %x:%x\n",
|
| 1953 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
|
| 1954 | int_reg);
|
| 1955 | }
|
| 1956 |
|
| 1957 | |
| 1958 | * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
|
| 1959 | *
|
| 1960 | * @pinstance: pointer to adapter instance structure
|
| 1961 | *
|
| 1962 | * Return Value
|
| 1963 | * none
|
| 1964 |
|
| 1965 | static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
|
| 1966 | {
|
| 1967 | pmcraid_info("%s is not yet implemented\n", __func__);
|
| 1968 | }
|
| 1969 |
|
| 1970 | |
| 1971 | * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
|
| 1972 | * @pinstance: pointer to adapter instance structure
|
| 1973 | *
|
| 1974 | * This function fails all outstanding ops. If they are submitted to IOA
|
| 1975 | * already, it sends cancel all messages if IOA is still accepting IOARCBs,
|
| 1976 | * otherwise just completes the commands and returns the cmd blocks to free
|
| 1977 | * pool.
|
| 1978 | *
|
| 1979 | * Return value:
|
| 1980 | * none
|
| 1981 |
|
| 1982 | static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
|
| 1983 | {
|
| 1984 | struct pmcraid_cmd *cmd, *temp;
|
| 1985 | unsigned long lock_flags;
|
| 1986 |
|
| 1987 | |
| 1988 | * traversal must be done as within this lock
|
| 1989 |
|
| 1990 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
|
| 1991 | list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
|
| 1992 | free_list) {
|
| 1993 | list_del(&cmd->free_list);
|
| 1994 | spin_unlock_irqrestore(&pinstance->pending_pool_lock,
|
| 1995 | lock_flags);
|
| 1996 | cmd->ioa_cb->ioasa.ioasc =
|
| 1997 | cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
|
| 1998 | cmd->ioa_cb->ioasa.ilid =
|
| 1999 | cpu_to_le32(PMCRAID_DRIVER_ILID);
|
| 2000 |
|
| 2001 |
|
| 2002 | timer_delete(&cmd->timer);
|
| 2003 |
|
| 2004 | |
| 2005 | * function. If this is one of the internal commands other
|
| 2006 | * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
|
| 2007 | * complete it
|
| 2008 |
|
| 2009 | if (cmd->scsi_cmd) {
|
| 2010 |
|
| 2011 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
| 2012 | __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
|
| 2013 |
|
| 2014 | scsi_cmd->result |= DID_ERROR << 16;
|
| 2015 |
|
| 2016 | scsi_dma_unmap(scsi_cmd);
|
| 2017 | pmcraid_return_cmd(cmd);
|
| 2018 |
|
| 2019 | pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
|
| 2020 | le32_to_cpu(resp) >> 2,
|
| 2021 | cmd->ioa_cb->ioarcb.cdb[0],
|
| 2022 | scsi_cmd->result);
|
| 2023 | scsi_done(scsi_cmd);
|
| 2024 | } else if (cmd->cmd_done == pmcraid_internal_done ||
|
| 2025 | cmd->cmd_done == pmcraid_erp_done) {
|
| 2026 | cmd->cmd_done(cmd);
|
| 2027 | } else if (cmd->cmd_done != pmcraid_ioa_reset &&
|
| 2028 | cmd->cmd_done != pmcraid_ioa_shutdown_done) {
|
| 2029 | pmcraid_return_cmd(cmd);
|
| 2030 | }
|
| 2031 |
|
| 2032 | atomic_dec(&pinstance->outstanding_cmds);
|
| 2033 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
|
| 2034 | }
|
| 2035 |
|
| 2036 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
|
| 2037 | }
|
| 2038 |
|
| 2039 | |
| 2040 | * pmcraid_ioa_reset - Implementation of IOA reset logic
|
| 2041 | *
|
| 2042 | * @cmd: pointer to the cmd block to be used for entire reset process
|
| 2043 | *
|
| 2044 | * This function executes most of the steps required for IOA reset. This gets
|
| 2045 | * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
|
| 2046 | * 'eh_' thread. Access to variables used for controlling the reset sequence is
|
| 2047 | * synchronized using host lock. Various functions called during reset process
|
| 2048 | * would make use of a single command block, pointer to which is also stored in
|
| 2049 | * adapter instance structure.
|
| 2050 | *
|
| 2051 | * Return Value
|
| 2052 | * None
|
| 2053 |
|
| 2054 | static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
|
| 2055 | {
|
| 2056 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 2057 | u8 reset_complete = 0;
|
| 2058 |
|
| 2059 | pinstance->ioa_reset_in_progress = 1;
|
| 2060 |
|
| 2061 | if (pinstance->reset_cmd != cmd) {
|
| 2062 | pmcraid_err("reset is called with different command block\n");
|
| 2063 | pinstance->reset_cmd = cmd;
|
| 2064 | }
|
| 2065 |
|
| 2066 | pmcraid_info("reset_engine: state = %d, command = %p\n",
|
| 2067 | pinstance->ioa_state, cmd);
|
| 2068 |
|
| 2069 | switch (pinstance->ioa_state) {
|
| 2070 |
|
| 2071 | case IOA_STATE_DEAD:
|
| 2072 | |
| 2073 | * return. callers might be waiting on the reset wait_q, wake
|
| 2074 | * up them
|
| 2075 |
|
| 2076 | pmcraid_err("IOA is offline no reset is possible\n");
|
| 2077 | reset_complete = 1;
|
| 2078 | break;
|
| 2079 |
|
| 2080 | case IOA_STATE_IN_BRINGDOWN:
|
| 2081 | |
| 2082 | * Alert IOA for a possible reset. If reset alert fails, IOA
|
| 2083 | * goes through hard-reset
|
| 2084 |
|
| 2085 | pmcraid_disable_interrupts(pinstance, ~0);
|
| 2086 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
| 2087 | pmcraid_reset_alert(cmd);
|
| 2088 | break;
|
| 2089 |
|
| 2090 | case IOA_STATE_UNKNOWN:
|
| 2091 | |
| 2092 | * is required for prior to reset
|
| 2093 |
|
| 2094 | scsi_block_requests(pinstance->host);
|
| 2095 |
|
| 2096 | |
| 2097 | * there are any error responses then IOA may require
|
| 2098 | * hard-reset.
|
| 2099 |
|
| 2100 | if (pinstance->ioa_hard_reset == 0) {
|
| 2101 | if (ioread32(pinstance->ioa_status) &
|
| 2102 | INTRS_TRANSITION_TO_OPERATIONAL) {
|
| 2103 | pmcraid_info("sticky bit set, bring-up\n");
|
| 2104 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
|
| 2105 | pmcraid_reinit_cmdblk(cmd);
|
| 2106 | pmcraid_identify_hrrq(cmd);
|
| 2107 | } else {
|
| 2108 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
|
| 2109 | pmcraid_soft_reset(cmd);
|
| 2110 | }
|
| 2111 | } else {
|
| 2112 | |
| 2113 | * operation in progress bit to reset
|
| 2114 |
|
| 2115 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
| 2116 | pmcraid_reset_alert(cmd);
|
| 2117 | }
|
| 2118 | break;
|
| 2119 |
|
| 2120 | case IOA_STATE_IN_RESET_ALERT:
|
| 2121 | |
| 2122 | * timed out, reset proceeds with starting BIST on the IOA.
|
| 2123 | * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
|
| 2124 | * they are 3 or more, reset engine marks IOA dead and returns
|
| 2125 |
|
| 2126 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
|
| 2127 | pmcraid_start_bist(cmd);
|
| 2128 | break;
|
| 2129 |
|
| 2130 | case IOA_STATE_IN_HARD_RESET:
|
| 2131 | pinstance->ioa_reset_attempts++;
|
| 2132 |
|
| 2133 |
|
| 2134 | if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
|
| 2135 | pinstance->ioa_reset_attempts = 0;
|
| 2136 | pmcraid_err("IOA didn't respond marking it as dead\n");
|
| 2137 | pinstance->ioa_state = IOA_STATE_DEAD;
|
| 2138 |
|
| 2139 | if (pinstance->ioa_bringdown)
|
| 2140 | pmcraid_notify_ioastate(pinstance,
|
| 2141 | PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
|
| 2142 | else
|
| 2143 | pmcraid_notify_ioastate(pinstance,
|
| 2144 | PMC_DEVICE_EVENT_RESET_FAILED);
|
| 2145 | reset_complete = 1;
|
| 2146 | break;
|
| 2147 | }
|
| 2148 |
|
| 2149 | |
| 2150 | * space. If this fails, proceed with hard reset again
|
| 2151 |
|
| 2152 | pci_restore_state(pinstance->pdev);
|
| 2153 |
|
| 2154 |
|
| 2155 | pmcraid_fail_outstanding_cmds(pinstance);
|
| 2156 |
|
| 2157 |
|
| 2158 | if (pinstance->ioa_unit_check) {
|
| 2159 | pmcraid_info("unit check is active\n");
|
| 2160 | pinstance->ioa_unit_check = 0;
|
| 2161 | pmcraid_get_dump(pinstance);
|
| 2162 | pinstance->ioa_reset_attempts--;
|
| 2163 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
|
| 2164 | pmcraid_reset_alert(cmd);
|
| 2165 | break;
|
| 2166 | }
|
| 2167 |
|
| 2168 | |
| 2169 | * done with the reset restore pci_config_space and complete
|
| 2170 | * the reset
|
| 2171 |
|
| 2172 | if (pinstance->ioa_bringdown) {
|
| 2173 | pmcraid_info("bringing down the adapter\n");
|
| 2174 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
|
| 2175 | pinstance->ioa_bringdown = 0;
|
| 2176 | pinstance->ioa_state = IOA_STATE_UNKNOWN;
|
| 2177 | pmcraid_notify_ioastate(pinstance,
|
| 2178 | PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
|
| 2179 | reset_complete = 1;
|
| 2180 | } else {
|
| 2181 | |
| 2182 | * Reinitialize hrrq_buffers and their indices also
|
| 2183 | * enable interrupts after a pci_restore_state
|
| 2184 |
|
| 2185 | if (pmcraid_reset_enable_ioa(pinstance)) {
|
| 2186 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
|
| 2187 | pmcraid_info("bringing up the adapter\n");
|
| 2188 | pmcraid_reinit_cmdblk(cmd);
|
| 2189 | pmcraid_identify_hrrq(cmd);
|
| 2190 | } else {
|
| 2191 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
|
| 2192 | pmcraid_soft_reset(cmd);
|
| 2193 | }
|
| 2194 | }
|
| 2195 | break;
|
| 2196 |
|
| 2197 | case IOA_STATE_IN_SOFT_RESET:
|
| 2198 | |
| 2199 | * sequence
|
| 2200 |
|
| 2201 | pmcraid_info("In softreset proceeding with bring-up\n");
|
| 2202 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
|
| 2203 |
|
| 2204 | |
| 2205 | * now on tasklet completes most of the commands as IOA is up
|
| 2206 | * and intrs are enabled
|
| 2207 |
|
| 2208 | pmcraid_identify_hrrq(cmd);
|
| 2209 | break;
|
| 2210 |
|
| 2211 | case IOA_STATE_IN_BRINGUP:
|
| 2212 | |
| 2213 | * operational and wake up any waiters
|
| 2214 |
|
| 2215 | pinstance->ioa_state = IOA_STATE_OPERATIONAL;
|
| 2216 | reset_complete = 1;
|
| 2217 | break;
|
| 2218 |
|
| 2219 | case IOA_STATE_OPERATIONAL:
|
| 2220 | default:
|
| 2221 | |
| 2222 | * the reset reason. If reset is to bring down IOA, unregister
|
| 2223 | * HCAMs and initiate shutdown; if adapter reset is forced then
|
| 2224 | * restart reset sequence again
|
| 2225 |
|
| 2226 | if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
|
| 2227 | pinstance->force_ioa_reset == 0) {
|
| 2228 | pmcraid_notify_ioastate(pinstance,
|
| 2229 | PMC_DEVICE_EVENT_RESET_SUCCESS);
|
| 2230 | reset_complete = 1;
|
| 2231 | } else {
|
| 2232 | if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
|
| 2233 | pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
|
| 2234 | pmcraid_reinit_cmdblk(cmd);
|
| 2235 | pmcraid_unregister_hcams(cmd);
|
| 2236 | }
|
| 2237 | break;
|
| 2238 | }
|
| 2239 |
|
| 2240 | |
| 2241 | * OPERATIONAL. Reset all control variables used during reset, wake up
|
| 2242 | * any waiting threads and let the SCSI mid-layer send commands. Note
|
| 2243 | * that host_lock must be held before invoking scsi_report_bus_reset.
|
| 2244 |
|
| 2245 | if (reset_complete) {
|
| 2246 | pinstance->ioa_reset_in_progress = 0;
|
| 2247 | pinstance->ioa_reset_attempts = 0;
|
| 2248 | pinstance->reset_cmd = NULL;
|
| 2249 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
|
| 2250 | pinstance->ioa_bringdown = 0;
|
| 2251 | pmcraid_return_cmd(cmd);
|
| 2252 |
|
| 2253 | |
| 2254 | * hcam registration and resource exposure to mid-layer.
|
| 2255 |
|
| 2256 | if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
|
| 2257 | pmcraid_register_hcams(pinstance);
|
| 2258 |
|
| 2259 | wake_up_all(&pinstance->reset_wait_q);
|
| 2260 | }
|
| 2261 |
|
| 2262 | return;
|
| 2263 | }
|
| 2264 |
|
| 2265 | |
| 2266 | * pmcraid_initiate_reset - initiates reset sequence. This is called from
|
| 2267 | * ISR/tasklet during error interrupts including IOA unit check. If reset
|
| 2268 | * is already in progress, it just returns, otherwise initiates IOA reset
|
| 2269 | * to bring IOA up to operational state.
|
| 2270 | *
|
| 2271 | * @pinstance: pointer to adapter instance structure
|
| 2272 | *
|
| 2273 | * Return value
|
| 2274 | * none
|
| 2275 |
|
| 2276 | static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
|
| 2277 | {
|
| 2278 | struct pmcraid_cmd *cmd;
|
| 2279 |
|
| 2280 | |
| 2281 | * reset sequence and return
|
| 2282 |
|
| 2283 | if (!pinstance->ioa_reset_in_progress) {
|
| 2284 | scsi_block_requests(pinstance->host);
|
| 2285 | cmd = pmcraid_get_free_cmd(pinstance);
|
| 2286 |
|
| 2287 | if (cmd == NULL) {
|
| 2288 | pmcraid_err("no cmnd blocks for initiate_reset\n");
|
| 2289 | return;
|
| 2290 | }
|
| 2291 |
|
| 2292 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
|
| 2293 | pinstance->reset_cmd = cmd;
|
| 2294 | pinstance->force_ioa_reset = 1;
|
| 2295 | pmcraid_notify_ioastate(pinstance,
|
| 2296 | PMC_DEVICE_EVENT_RESET_START);
|
| 2297 | pmcraid_ioa_reset(cmd);
|
| 2298 | }
|
| 2299 | }
|
| 2300 |
|
| 2301 | |
| 2302 | * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
|
| 2303 | * or bringdown IOA
|
| 2304 | * @pinstance: pointer adapter instance structure
|
| 2305 | * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
|
| 2306 | * @target_state: expected target state after reset
|
| 2307 | *
|
| 2308 | * Note: This command initiates reset and waits for its completion. Hence this
|
| 2309 | * should not be called from isr/timer/tasklet functions (timeout handlers,
|
| 2310 | * error response handlers and interrupt handlers).
|
| 2311 | *
|
| 2312 | * Return Value
|
| 2313 | * 1 in case ioa_state is not target_state, 0 otherwise.
|
| 2314 |
|
| 2315 | static int pmcraid_reset_reload(
|
| 2316 | struct pmcraid_instance *pinstance,
|
| 2317 | u8 shutdown_type,
|
| 2318 | u8 target_state
|
| 2319 | )
|
| 2320 | {
|
| 2321 | struct pmcraid_cmd *reset_cmd = NULL;
|
| 2322 | unsigned long lock_flags;
|
| 2323 | int reset = 1;
|
| 2324 |
|
| 2325 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 2326 |
|
| 2327 | if (pinstance->ioa_reset_in_progress) {
|
| 2328 | pmcraid_info("reset_reload: reset is already in progress\n");
|
| 2329 |
|
| 2330 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 2331 |
|
| 2332 | wait_event(pinstance->reset_wait_q,
|
| 2333 | !pinstance->ioa_reset_in_progress);
|
| 2334 |
|
| 2335 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 2336 |
|
| 2337 | if (pinstance->ioa_state == IOA_STATE_DEAD) {
|
| 2338 | pmcraid_info("reset_reload: IOA is dead\n");
|
| 2339 | goto out_unlock;
|
| 2340 | }
|
| 2341 |
|
| 2342 | if (pinstance->ioa_state == target_state) {
|
| 2343 | reset = 0;
|
| 2344 | goto out_unlock;
|
| 2345 | }
|
| 2346 | }
|
| 2347 |
|
| 2348 | pmcraid_info("reset_reload: proceeding with reset\n");
|
| 2349 | scsi_block_requests(pinstance->host);
|
| 2350 | reset_cmd = pmcraid_get_free_cmd(pinstance);
|
| 2351 | if (reset_cmd == NULL) {
|
| 2352 | pmcraid_err("no free cmnd for reset_reload\n");
|
| 2353 | goto out_unlock;
|
| 2354 | }
|
| 2355 |
|
| 2356 | if (shutdown_type == SHUTDOWN_NORMAL)
|
| 2357 | pinstance->ioa_bringdown = 1;
|
| 2358 |
|
| 2359 | pinstance->ioa_shutdown_type = shutdown_type;
|
| 2360 | pinstance->reset_cmd = reset_cmd;
|
| 2361 | pinstance->force_ioa_reset = reset;
|
| 2362 | pmcraid_info("reset_reload: initiating reset\n");
|
| 2363 | pmcraid_ioa_reset(reset_cmd);
|
| 2364 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 2365 | pmcraid_info("reset_reload: waiting for reset to complete\n");
|
| 2366 | wait_event(pinstance->reset_wait_q,
|
| 2367 | !pinstance->ioa_reset_in_progress);
|
| 2368 |
|
| 2369 | pmcraid_info("reset_reload: reset is complete !!\n");
|
| 2370 | scsi_unblock_requests(pinstance->host);
|
| 2371 | return pinstance->ioa_state != target_state;
|
| 2372 |
|
| 2373 | out_unlock:
|
| 2374 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 2375 | return reset;
|
| 2376 | }
|
| 2377 |
|
| 2378 | |
| 2379 | * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
|
| 2380 | *
|
| 2381 | * @pinstance: pointer to adapter instance structure
|
| 2382 | *
|
| 2383 | * Return Value
|
| 2384 | * whatever is returned from pmcraid_reset_reload
|
| 2385 |
|
| 2386 | static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
|
| 2387 | {
|
| 2388 | return pmcraid_reset_reload(pinstance,
|
| 2389 | SHUTDOWN_NORMAL,
|
| 2390 | IOA_STATE_UNKNOWN);
|
| 2391 | }
|
| 2392 |
|
| 2393 | |
| 2394 | * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
|
| 2395 | *
|
| 2396 | * @pinstance: pointer to adapter instance structure
|
| 2397 | *
|
| 2398 | * Return Value
|
| 2399 | * whatever is returned from pmcraid_reset_reload
|
| 2400 |
|
| 2401 | static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
|
| 2402 | {
|
| 2403 | pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
|
| 2404 |
|
| 2405 | return pmcraid_reset_reload(pinstance,
|
| 2406 | SHUTDOWN_NONE,
|
| 2407 | IOA_STATE_OPERATIONAL);
|
| 2408 | }
|
| 2409 |
|
| 2410 | |
| 2411 | * pmcraid_request_sense - Send request sense to a device
|
| 2412 | * @cmd: pmcraid command struct
|
| 2413 | *
|
| 2414 | * This function sends a request sense to a device as a result of a check
|
| 2415 | * condition. This method re-uses the same command block that failed earlier.
|
| 2416 |
|
| 2417 | static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
|
| 2418 | {
|
| 2419 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
| 2420 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
|
| 2421 | struct device *dev = &cmd->drv_inst->pdev->dev;
|
| 2422 |
|
| 2423 | cmd->sense_buffer = cmd->scsi_cmd->sense_buffer;
|
| 2424 | cmd->sense_buffer_dma = dma_map_single(dev, cmd->sense_buffer,
|
| 2425 | SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
|
| 2426 | if (dma_mapping_error(dev, cmd->sense_buffer_dma)) {
|
| 2427 | pmcraid_err
|
| 2428 | ("couldn't allocate sense buffer for request sense\n");
|
| 2429 | pmcraid_erp_done(cmd);
|
| 2430 | return;
|
| 2431 | }
|
| 2432 |
|
| 2433 |
|
| 2434 | memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
|
| 2435 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
|
| 2436 | ioarcb->request_flags0 = (SYNC_COMPLETE |
|
| 2437 | NO_LINK_DESCS |
|
| 2438 | INHIBIT_UL_CHECK);
|
| 2439 | ioarcb->request_type = REQ_TYPE_SCSI;
|
| 2440 | ioarcb->cdb[0] = REQUEST_SENSE;
|
| 2441 | ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
|
| 2442 |
|
| 2443 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
| 2444 | offsetof(struct pmcraid_ioarcb,
|
| 2445 | add_data.u.ioadl[0]));
|
| 2446 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
| 2447 |
|
| 2448 | ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
|
| 2449 |
|
| 2450 | ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
|
| 2451 | ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
|
| 2452 | ioadl->flags = IOADL_FLAGS_LAST_DESC;
|
| 2453 |
|
| 2454 | |
| 2455 | * which runs in tasklets context. It is possible that mid-layer might
|
| 2456 | * schedule queuecommand during this time, hence, writting to IOARRIN
|
| 2457 | * must be protect by host_lock
|
| 2458 |
|
| 2459 | pmcraid_send_cmd(cmd, pmcraid_erp_done,
|
| 2460 | PMCRAID_REQUEST_SENSE_TIMEOUT,
|
| 2461 | pmcraid_timeout_handler);
|
| 2462 | }
|
| 2463 |
|
| 2464 | |
| 2465 | * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
|
| 2466 | * @cmd: command that failed
|
| 2467 | * @need_sense: true if request_sense is required after cancel all
|
| 2468 | *
|
| 2469 | * This function sends a cancel all to a device to clear the queue.
|
| 2470 |
|
| 2471 | static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, bool need_sense)
|
| 2472 | {
|
| 2473 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
| 2474 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
| 2475 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
|
| 2476 |
|
| 2477 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
|
| 2478 | ioarcb->request_flags0 = SYNC_OVERRIDE;
|
| 2479 | ioarcb->request_type = REQ_TYPE_IOACMD;
|
| 2480 | ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
|
| 2481 |
|
| 2482 | if (RES_IS_GSCSI(res->cfg_entry))
|
| 2483 | ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
|
| 2484 |
|
| 2485 | ioarcb->ioadl_bus_addr = 0;
|
| 2486 | ioarcb->ioadl_length = 0;
|
| 2487 | ioarcb->data_transfer_length = 0;
|
| 2488 | ioarcb->ioarcb_bus_addr &= cpu_to_le64((~0x1FULL));
|
| 2489 |
|
| 2490 | |
| 2491 | * schedule queuecommand while we are doing this
|
| 2492 |
|
| 2493 | pmcraid_send_cmd(cmd, need_sense ?
|
| 2494 | pmcraid_erp_done : pmcraid_request_sense,
|
| 2495 | PMCRAID_REQUEST_SENSE_TIMEOUT,
|
| 2496 | pmcraid_timeout_handler);
|
| 2497 | }
|
| 2498 |
|
| 2499 | |
| 2500 | * pmcraid_frame_auto_sense: frame fixed format sense information
|
| 2501 | *
|
| 2502 | * @cmd: pointer to failing command block
|
| 2503 | *
|
| 2504 | * Return value
|
| 2505 | * none
|
| 2506 |
|
| 2507 | static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
|
| 2508 | {
|
| 2509 | u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
|
| 2510 | struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
|
| 2511 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
|
| 2512 | u32 ioasc = le32_to_cpu(ioasa->ioasc);
|
| 2513 | u32 failing_lba = 0;
|
| 2514 |
|
| 2515 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
|
| 2516 | cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
|
| 2517 |
|
| 2518 | if (RES_IS_VSET(res->cfg_entry) &&
|
| 2519 | ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
|
| 2520 | ioasa->u.vset.failing_lba_hi != 0) {
|
| 2521 |
|
| 2522 | sense_buf[0] = 0x72;
|
| 2523 | sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
|
| 2524 | sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
|
| 2525 | sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
|
| 2526 |
|
| 2527 | sense_buf[7] = 12;
|
| 2528 | sense_buf[8] = 0;
|
| 2529 | sense_buf[9] = 0x0A;
|
| 2530 | sense_buf[10] = 0x80;
|
| 2531 |
|
| 2532 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
|
| 2533 |
|
| 2534 | sense_buf[12] = (failing_lba & 0xff000000) >> 24;
|
| 2535 | sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
|
| 2536 | sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
|
| 2537 | sense_buf[15] = failing_lba & 0x000000ff;
|
| 2538 |
|
| 2539 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
|
| 2540 |
|
| 2541 | sense_buf[16] = (failing_lba & 0xff000000) >> 24;
|
| 2542 | sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
|
| 2543 | sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
|
| 2544 | sense_buf[19] = failing_lba & 0x000000ff;
|
| 2545 | } else {
|
| 2546 | sense_buf[0] = 0x70;
|
| 2547 | sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
|
| 2548 | sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
|
| 2549 | sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
|
| 2550 |
|
| 2551 | if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
|
| 2552 | if (RES_IS_VSET(res->cfg_entry))
|
| 2553 | failing_lba =
|
| 2554 | le32_to_cpu(ioasa->u.
|
| 2555 | vset.failing_lba_lo);
|
| 2556 | sense_buf[0] |= 0x80;
|
| 2557 | sense_buf[3] = (failing_lba >> 24) & 0xff;
|
| 2558 | sense_buf[4] = (failing_lba >> 16) & 0xff;
|
| 2559 | sense_buf[5] = (failing_lba >> 8) & 0xff;
|
| 2560 | sense_buf[6] = failing_lba & 0xff;
|
| 2561 | }
|
| 2562 |
|
| 2563 | sense_buf[7] = 6;
|
| 2564 | }
|
| 2565 | }
|
| 2566 |
|
| 2567 | |
| 2568 | * pmcraid_error_handler - Error response handlers for a SCSI op
|
| 2569 | * @cmd: pointer to pmcraid_cmd that has failed
|
| 2570 | *
|
| 2571 | * This function determines whether or not to initiate ERP on the affected
|
| 2572 | * device. This is called from a tasklet, which doesn't hold any locks.
|
| 2573 | *
|
| 2574 | * Return value:
|
| 2575 | * 0 it caller can complete the request, otherwise 1 where in error
|
| 2576 | * handler itself completes the request and returns the command block
|
| 2577 | * back to free-pool
|
| 2578 |
|
| 2579 | static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
|
| 2580 | {
|
| 2581 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
| 2582 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
|
| 2583 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 2584 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
|
| 2585 | u32 ioasc = le32_to_cpu(ioasa->ioasc);
|
| 2586 | u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
|
| 2587 | bool sense_copied = false;
|
| 2588 |
|
| 2589 | if (!res) {
|
| 2590 | pmcraid_info("resource pointer is NULL\n");
|
| 2591 | return 0;
|
| 2592 | }
|
| 2593 |
|
| 2594 |
|
| 2595 | if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
|
| 2596 | atomic_inc(&res->read_failures);
|
| 2597 | else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
|
| 2598 | atomic_inc(&res->write_failures);
|
| 2599 |
|
| 2600 | if (!RES_IS_GSCSI(res->cfg_entry) &&
|
| 2601 | masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
|
| 2602 | pmcraid_frame_auto_sense(cmd);
|
| 2603 | }
|
| 2604 |
|
| 2605 |
|
| 2606 | pmcraid_ioasc_logger(ioasc, cmd);
|
| 2607 |
|
| 2608 | switch (masked_ioasc) {
|
| 2609 |
|
| 2610 | case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
|
| 2611 | scsi_cmd->result |= (DID_ABORT << 16);
|
| 2612 | break;
|
| 2613 |
|
| 2614 | case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
|
| 2615 | case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
|
| 2616 | scsi_cmd->result |= (DID_NO_CONNECT << 16);
|
| 2617 | break;
|
| 2618 |
|
| 2619 | case PMCRAID_IOASC_NR_SYNC_REQUIRED:
|
| 2620 | res->sync_reqd = 1;
|
| 2621 | scsi_cmd->result |= (DID_IMM_RETRY << 16);
|
| 2622 | break;
|
| 2623 |
|
| 2624 | case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
|
| 2625 | scsi_cmd->result |= (DID_PASSTHROUGH << 16);
|
| 2626 | break;
|
| 2627 |
|
| 2628 | case PMCRAID_IOASC_UA_BUS_WAS_RESET:
|
| 2629 | case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
|
| 2630 | if (!res->reset_progress)
|
| 2631 | scsi_report_bus_reset(pinstance->host,
|
| 2632 | scsi_cmd->device->channel);
|
| 2633 | scsi_cmd->result |= (DID_ERROR << 16);
|
| 2634 | break;
|
| 2635 |
|
| 2636 | case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
|
| 2637 | scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
|
| 2638 | res->sync_reqd = 1;
|
| 2639 |
|
| 2640 | |
| 2641 | * get/frame the sense buffer
|
| 2642 |
|
| 2643 | if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
|
| 2644 | SAM_STAT_CHECK_CONDITION &&
|
| 2645 | PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
|
| 2646 | return 0;
|
| 2647 |
|
| 2648 | |
| 2649 | * mid-layer
|
| 2650 |
|
| 2651 | if (ioasa->auto_sense_length != 0) {
|
| 2652 | short sense_len = le16_to_cpu(ioasa->auto_sense_length);
|
| 2653 | int data_size = min_t(u16, sense_len,
|
| 2654 | SCSI_SENSE_BUFFERSIZE);
|
| 2655 |
|
| 2656 | memcpy(scsi_cmd->sense_buffer,
|
| 2657 | ioasa->sense_data,
|
| 2658 | data_size);
|
| 2659 | sense_copied = true;
|
| 2660 | }
|
| 2661 |
|
| 2662 | if (RES_IS_GSCSI(res->cfg_entry))
|
| 2663 | pmcraid_cancel_all(cmd, sense_copied);
|
| 2664 | else if (sense_copied)
|
| 2665 | pmcraid_erp_done(cmd);
|
| 2666 | else
|
| 2667 | pmcraid_request_sense(cmd);
|
| 2668 |
|
| 2669 | return 1;
|
| 2670 |
|
| 2671 | case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
|
| 2672 | break;
|
| 2673 |
|
| 2674 | default:
|
| 2675 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
|
| 2676 | scsi_cmd->result |= (DID_ERROR << 16);
|
| 2677 | break;
|
| 2678 | }
|
| 2679 | return 0;
|
| 2680 | }
|
| 2681 |
|
| 2682 | |
| 2683 | * pmcraid_reset_device - device reset handler functions
|
| 2684 | *
|
| 2685 | * @scsi_dev: scsi device struct
|
| 2686 | * @timeout: command timeout
|
| 2687 | * @modifier: reset modifier indicating the reset sequence to be performed
|
| 2688 | *
|
| 2689 | * This function issues a device reset to the affected device.
|
| 2690 | * A LUN reset will be sent to the device first. If that does
|
| 2691 | * not work, a target reset will be sent.
|
| 2692 | *
|
| 2693 | * Return value:
|
| 2694 | * SUCCESS / FAILED
|
| 2695 |
|
| 2696 | static int pmcraid_reset_device(
|
| 2697 | struct scsi_device *scsi_dev,
|
| 2698 | unsigned long timeout,
|
| 2699 | u8 modifier)
|
| 2700 | {
|
| 2701 | struct pmcraid_cmd *cmd;
|
| 2702 | struct pmcraid_instance *pinstance;
|
| 2703 | struct pmcraid_resource_entry *res;
|
| 2704 | struct pmcraid_ioarcb *ioarcb;
|
| 2705 | unsigned long lock_flags;
|
| 2706 | u32 ioasc;
|
| 2707 |
|
| 2708 | pinstance =
|
| 2709 | (struct pmcraid_instance *)scsi_dev->host->hostdata;
|
| 2710 | res = scsi_dev->hostdata;
|
| 2711 |
|
| 2712 | if (!res) {
|
| 2713 | sdev_printk(KERN_ERR, scsi_dev,
|
| 2714 | "reset_device: NULL resource pointer\n");
|
| 2715 | return FAILED;
|
| 2716 | }
|
| 2717 |
|
| 2718 | |
| 2719 | * This will force the mid-layer to call _eh_bus/host reset, which
|
| 2720 | * will then go to sleep and wait for the reset to complete
|
| 2721 |
|
| 2722 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 2723 | if (pinstance->ioa_reset_in_progress ||
|
| 2724 | pinstance->ioa_state == IOA_STATE_DEAD) {
|
| 2725 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 2726 | return FAILED;
|
| 2727 | }
|
| 2728 |
|
| 2729 | res->reset_progress = 1;
|
| 2730 | pmcraid_info("Resetting %s resource with addr %x\n",
|
| 2731 | ((modifier & RESET_DEVICE_LUN) ? "LUN" :
|
| 2732 | ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
|
| 2733 | le32_to_cpu(res->cfg_entry.resource_address));
|
| 2734 |
|
| 2735 |
|
| 2736 | cmd = pmcraid_get_free_cmd(pinstance);
|
| 2737 |
|
| 2738 | if (cmd == NULL) {
|
| 2739 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 2740 | pmcraid_err("%s: no cmd blocks are available\n", __func__);
|
| 2741 | return FAILED;
|
| 2742 | }
|
| 2743 |
|
| 2744 | ioarcb = &cmd->ioa_cb->ioarcb;
|
| 2745 | ioarcb->resource_handle = res->cfg_entry.resource_handle;
|
| 2746 | ioarcb->request_type = REQ_TYPE_IOACMD;
|
| 2747 | ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
|
| 2748 |
|
| 2749 |
|
| 2750 | if (modifier)
|
| 2751 | modifier = ENABLE_RESET_MODIFIER | modifier;
|
| 2752 |
|
| 2753 | ioarcb->cdb[1] = modifier;
|
| 2754 |
|
| 2755 | init_completion(&cmd->wait_for_completion);
|
| 2756 | cmd->completion_req = 1;
|
| 2757 |
|
| 2758 | pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
|
| 2759 | cmd->ioa_cb->ioarcb.cdb[0],
|
| 2760 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
|
| 2761 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
|
| 2762 |
|
| 2763 | pmcraid_send_cmd(cmd,
|
| 2764 | pmcraid_internal_done,
|
| 2765 | timeout,
|
| 2766 | pmcraid_timeout_handler);
|
| 2767 |
|
| 2768 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 2769 |
|
| 2770 | |
| 2771 | * completed. Once this command is completed, pmcraind_internal_done
|
| 2772 | * will wake up the 'completion' queue.
|
| 2773 |
|
| 2774 | wait_for_completion(&cmd->wait_for_completion);
|
| 2775 |
|
| 2776 | |
| 2777 | * to free list
|
| 2778 |
|
| 2779 | pmcraid_return_cmd(cmd);
|
| 2780 | res->reset_progress = 0;
|
| 2781 | ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
| 2782 |
|
| 2783 |
|
| 2784 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
|
| 2785 | }
|
| 2786 |
|
| 2787 | |
| 2788 | * _pmcraid_io_done - helper for pmcraid_io_done function
|
| 2789 | *
|
| 2790 | * @cmd: pointer to pmcraid command struct
|
| 2791 | * @reslen: residual data length to be set in the ioasa
|
| 2792 | * @ioasc: ioasc either returned by IOA or set by driver itself.
|
| 2793 | *
|
| 2794 | * This function is invoked by pmcraid_io_done to complete mid-layer
|
| 2795 | * scsi ops.
|
| 2796 | *
|
| 2797 | * Return value:
|
| 2798 | * 0 if caller is required to return it to free_pool. Returns 1 if
|
| 2799 | * caller need not worry about freeing command block as error handler
|
| 2800 | * will take care of that.
|
| 2801 |
|
| 2802 |
|
| 2803 | static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
|
| 2804 | {
|
| 2805 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
| 2806 | int rc = 0;
|
| 2807 |
|
| 2808 | scsi_set_resid(scsi_cmd, reslen);
|
| 2809 |
|
| 2810 | pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
|
| 2811 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
|
| 2812 | cmd->ioa_cb->ioarcb.cdb[0],
|
| 2813 | ioasc, scsi_cmd->result);
|
| 2814 |
|
| 2815 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
|
| 2816 | rc = pmcraid_error_handler(cmd);
|
| 2817 |
|
| 2818 | if (rc == 0) {
|
| 2819 | scsi_dma_unmap(scsi_cmd);
|
| 2820 | scsi_done(scsi_cmd);
|
| 2821 | }
|
| 2822 |
|
| 2823 | return rc;
|
| 2824 | }
|
| 2825 |
|
| 2826 | |
| 2827 | * pmcraid_io_done - SCSI completion function
|
| 2828 | *
|
| 2829 | * @cmd: pointer to pmcraid command struct
|
| 2830 | *
|
| 2831 | * This function is invoked by tasklet/mid-layer error handler to completing
|
| 2832 | * the SCSI ops sent from mid-layer.
|
| 2833 | *
|
| 2834 | * Return value
|
| 2835 | * none
|
| 2836 |
|
| 2837 |
|
| 2838 | static void pmcraid_io_done(struct pmcraid_cmd *cmd)
|
| 2839 | {
|
| 2840 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
|
| 2841 | u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
|
| 2842 |
|
| 2843 | if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
|
| 2844 | pmcraid_return_cmd(cmd);
|
| 2845 | }
|
| 2846 |
|
| 2847 | |
| 2848 | * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
|
| 2849 | *
|
| 2850 | * @cmd: command block of the command to be aborted
|
| 2851 | *
|
| 2852 | * Return Value:
|
| 2853 | * returns pointer to command structure used as cancelling cmd
|
| 2854 |
|
| 2855 | static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
|
| 2856 | {
|
| 2857 | struct pmcraid_cmd *cancel_cmd;
|
| 2858 | struct pmcraid_instance *pinstance;
|
| 2859 |
|
| 2860 | pinstance = (struct pmcraid_instance *)cmd->drv_inst;
|
| 2861 |
|
| 2862 | cancel_cmd = pmcraid_get_free_cmd(pinstance);
|
| 2863 |
|
| 2864 | if (cancel_cmd == NULL) {
|
| 2865 | pmcraid_err("%s: no cmd blocks are available\n", __func__);
|
| 2866 | return NULL;
|
| 2867 | }
|
| 2868 |
|
| 2869 | pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
|
| 2870 |
|
| 2871 | pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
|
| 2872 | cmd->ioa_cb->ioarcb.cdb[0],
|
| 2873 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
|
| 2874 |
|
| 2875 | init_completion(&cancel_cmd->wait_for_completion);
|
| 2876 | cancel_cmd->completion_req = 1;
|
| 2877 |
|
| 2878 | pmcraid_info("command (%d) CDB[0] = %x for %x\n",
|
| 2879 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
|
| 2880 | cancel_cmd->ioa_cb->ioarcb.cdb[0],
|
| 2881 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
|
| 2882 |
|
| 2883 | pmcraid_send_cmd(cancel_cmd,
|
| 2884 | pmcraid_internal_done,
|
| 2885 | PMCRAID_INTERNAL_TIMEOUT,
|
| 2886 | pmcraid_timeout_handler);
|
| 2887 | return cancel_cmd;
|
| 2888 | }
|
| 2889 |
|
| 2890 | |
| 2891 | * pmcraid_abort_complete - Waits for ABORT TASK completion
|
| 2892 | *
|
| 2893 | * @cancel_cmd: command block use as cancelling command
|
| 2894 | *
|
| 2895 | * Return Value:
|
| 2896 | * returns SUCCESS if ABORT TASK has good completion
|
| 2897 | * otherwise FAILED
|
| 2898 |
|
| 2899 | static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
|
| 2900 | {
|
| 2901 | struct pmcraid_resource_entry *res;
|
| 2902 | u32 ioasc;
|
| 2903 |
|
| 2904 | wait_for_completion(&cancel_cmd->wait_for_completion);
|
| 2905 | res = cancel_cmd->res;
|
| 2906 | cancel_cmd->res = NULL;
|
| 2907 | ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
|
| 2908 |
|
| 2909 | |
| 2910 | * as sense_key, otherwise we may get one the following responses
|
| 2911 | * due to subsequent bus reset or device reset. In case IOASC is
|
| 2912 | * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
|
| 2913 |
|
| 2914 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
|
| 2915 | ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
|
| 2916 | if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
|
| 2917 | res->sync_reqd = 1;
|
| 2918 | ioasc = 0;
|
| 2919 | }
|
| 2920 |
|
| 2921 |
|
| 2922 | pmcraid_return_cmd(cancel_cmd);
|
| 2923 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
|
| 2924 | }
|
| 2925 |
|
| 2926 | |
| 2927 | * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
|
| 2928 | *
|
| 2929 | * @scsi_cmd: scsi command struct given by mid-layer. When this is called
|
| 2930 | * mid-layer ensures that no other commands are queued. This
|
| 2931 | * never gets called under interrupt, but a separate eh thread.
|
| 2932 | *
|
| 2933 | * Return value:
|
| 2934 | * SUCCESS / FAILED
|
| 2935 |
|
| 2936 | static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
|
| 2937 | {
|
| 2938 | struct pmcraid_instance *pinstance;
|
| 2939 | struct pmcraid_cmd *cmd;
|
| 2940 | struct pmcraid_resource_entry *res;
|
| 2941 | unsigned long host_lock_flags;
|
| 2942 | unsigned long pending_lock_flags;
|
| 2943 | struct pmcraid_cmd *cancel_cmd = NULL;
|
| 2944 | int cmd_found = 0;
|
| 2945 | int rc = FAILED;
|
| 2946 |
|
| 2947 | pinstance =
|
| 2948 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
|
| 2949 |
|
| 2950 | scmd_printk(KERN_INFO, scsi_cmd,
|
| 2951 | "I/O command timed out, aborting it.\n");
|
| 2952 |
|
| 2953 | res = scsi_cmd->device->hostdata;
|
| 2954 |
|
| 2955 | if (res == NULL)
|
| 2956 | return rc;
|
| 2957 |
|
| 2958 | |
| 2959 | * This will force the mid-layer to eventually call
|
| 2960 | * pmcraid_eh_host_reset which will then go to sleep and wait for the
|
| 2961 | * reset to complete
|
| 2962 |
|
| 2963 | spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
|
| 2964 |
|
| 2965 | if (pinstance->ioa_reset_in_progress ||
|
| 2966 | pinstance->ioa_state == IOA_STATE_DEAD) {
|
| 2967 | spin_unlock_irqrestore(pinstance->host->host_lock,
|
| 2968 | host_lock_flags);
|
| 2969 | return rc;
|
| 2970 | }
|
| 2971 |
|
| 2972 | |
| 2973 | * scsi_cmd. Note that this command might not have been completed
|
| 2974 | * already. locking: all pending commands are protected with
|
| 2975 | * pending_pool_lock.
|
| 2976 |
|
| 2977 | spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
|
| 2978 | list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
|
| 2979 |
|
| 2980 | if (cmd->scsi_cmd == scsi_cmd) {
|
| 2981 | cmd_found = 1;
|
| 2982 | break;
|
| 2983 | }
|
| 2984 | }
|
| 2985 |
|
| 2986 | spin_unlock_irqrestore(&pinstance->pending_pool_lock,
|
| 2987 | pending_lock_flags);
|
| 2988 |
|
| 2989 | |
| 2990 | * it, send ABORT_TASK to abort this and wait for its completion
|
| 2991 |
|
| 2992 | if (cmd_found)
|
| 2993 | cancel_cmd = pmcraid_abort_cmd(cmd);
|
| 2994 |
|
| 2995 | spin_unlock_irqrestore(pinstance->host->host_lock,
|
| 2996 | host_lock_flags);
|
| 2997 |
|
| 2998 | if (cancel_cmd) {
|
| 2999 | cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
|
| 3000 | rc = pmcraid_abort_complete(cancel_cmd);
|
| 3001 | }
|
| 3002 |
|
| 3003 | return cmd_found ? rc : SUCCESS;
|
| 3004 | }
|
| 3005 |
|
| 3006 | |
| 3007 | * pmcraid_eh_device_reset_handler - bus/target/device reset handler callbacks
|
| 3008 | *
|
| 3009 | * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
|
| 3010 | *
|
| 3011 | * All these routines invokve pmcraid_reset_device with appropriate parameters.
|
| 3012 | * Since these are called from mid-layer EH thread, no other IO will be queued
|
| 3013 | * to the resource being reset. However, control path (IOCTL) may be active so
|
| 3014 | * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
|
| 3015 | * takes care by locking/unlocking host_lock.
|
| 3016 | *
|
| 3017 | * Return value
|
| 3018 | * SUCCESS or FAILED
|
| 3019 |
|
| 3020 | static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
|
| 3021 | {
|
| 3022 | scmd_printk(KERN_INFO, scmd,
|
| 3023 | "resetting device due to an I/O command timeout.\n");
|
| 3024 | return pmcraid_reset_device(scmd->device,
|
| 3025 | PMCRAID_INTERNAL_TIMEOUT,
|
| 3026 | RESET_DEVICE_LUN);
|
| 3027 | }
|
| 3028 |
|
| 3029 | static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
|
| 3030 | {
|
| 3031 | struct Scsi_Host *host = scmd->device->host;
|
| 3032 | struct pmcraid_instance *pinstance =
|
| 3033 | (struct pmcraid_instance *)host->hostdata;
|
| 3034 | struct pmcraid_resource_entry *res = NULL;
|
| 3035 | struct pmcraid_resource_entry *temp;
|
| 3036 | struct scsi_device *sdev = NULL;
|
| 3037 | unsigned long lock_flags;
|
| 3038 |
|
| 3039 | |
| 3040 | * The reset device code insists on us passing down
|
| 3041 | * a device, so grab the first device on the bus.
|
| 3042 |
|
| 3043 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
|
| 3044 | list_for_each_entry(temp, &pinstance->used_res_q, queue) {
|
| 3045 | if (scmd->device->channel == PMCRAID_VSET_BUS_ID &&
|
| 3046 | RES_IS_VSET(temp->cfg_entry)) {
|
| 3047 | res = temp;
|
| 3048 | break;
|
| 3049 | } else if (scmd->device->channel == PMCRAID_PHYS_BUS_ID &&
|
| 3050 | RES_IS_GSCSI(temp->cfg_entry)) {
|
| 3051 | res = temp;
|
| 3052 | break;
|
| 3053 | }
|
| 3054 | }
|
| 3055 | if (res)
|
| 3056 | sdev = res->scsi_dev;
|
| 3057 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
|
| 3058 | if (!sdev)
|
| 3059 | return FAILED;
|
| 3060 |
|
| 3061 | sdev_printk(KERN_INFO, sdev,
|
| 3062 | "Doing bus reset due to an I/O command timeout.\n");
|
| 3063 | return pmcraid_reset_device(sdev,
|
| 3064 | PMCRAID_RESET_BUS_TIMEOUT,
|
| 3065 | RESET_DEVICE_BUS);
|
| 3066 | }
|
| 3067 |
|
| 3068 | static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
|
| 3069 | {
|
| 3070 | struct Scsi_Host *shost = scmd->device->host;
|
| 3071 | struct scsi_device *scsi_dev = NULL, *tmp;
|
| 3072 | int ret;
|
| 3073 |
|
| 3074 | shost_for_each_device(tmp, shost) {
|
| 3075 | if ((tmp->channel == scmd->device->channel) &&
|
| 3076 | (tmp->id == scmd->device->id)) {
|
| 3077 | scsi_dev = tmp;
|
| 3078 | break;
|
| 3079 | }
|
| 3080 | }
|
| 3081 | if (!scsi_dev)
|
| 3082 | return FAILED;
|
| 3083 | sdev_printk(KERN_INFO, scsi_dev,
|
| 3084 | "Doing target reset due to an I/O command timeout.\n");
|
| 3085 | ret = pmcraid_reset_device(scsi_dev,
|
| 3086 | PMCRAID_INTERNAL_TIMEOUT,
|
| 3087 | RESET_DEVICE_TARGET);
|
| 3088 | scsi_device_put(scsi_dev);
|
| 3089 | return ret;
|
| 3090 | }
|
| 3091 |
|
| 3092 | |
| 3093 | * pmcraid_eh_host_reset_handler - adapter reset handler callback
|
| 3094 | *
|
| 3095 | * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
|
| 3096 | *
|
| 3097 | * Initiates adapter reset to bring it up to operational state
|
| 3098 | *
|
| 3099 | * Return value
|
| 3100 | * SUCCESS or FAILED
|
| 3101 |
|
| 3102 | static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
|
| 3103 | {
|
| 3104 | unsigned long interval = 10000;
|
| 3105 | int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
|
| 3106 | struct pmcraid_instance *pinstance =
|
| 3107 | (struct pmcraid_instance *)(scmd->device->host->hostdata);
|
| 3108 |
|
| 3109 |
|
| 3110 | |
| 3111 | * up and if it could complete all the pending commands excluding the
|
| 3112 | * two HCAM (CCN and LDN).
|
| 3113 |
|
| 3114 | while (waits--) {
|
| 3115 | if (atomic_read(&pinstance->outstanding_cmds) <=
|
| 3116 | PMCRAID_MAX_HCAM_CMD)
|
| 3117 | return SUCCESS;
|
| 3118 | msleep(interval);
|
| 3119 | }
|
| 3120 |
|
| 3121 | dev_err(&pinstance->pdev->dev,
|
| 3122 | "Adapter being reset due to an I/O command timeout.\n");
|
| 3123 | return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
|
| 3124 | }
|
| 3125 |
|
| 3126 | |
| 3127 | * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
|
| 3128 | * @cmd: pmcraid command struct
|
| 3129 | * @sgcount: count of scatter-gather elements
|
| 3130 | *
|
| 3131 | * Return value
|
| 3132 | * returns pointer pmcraid_ioadl_desc, initialized to point to internal
|
| 3133 | * or external IOADLs
|
| 3134 |
|
| 3135 | static struct pmcraid_ioadl_desc *
|
| 3136 | pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
|
| 3137 | {
|
| 3138 | struct pmcraid_ioadl_desc *ioadl;
|
| 3139 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
| 3140 | int ioadl_count = 0;
|
| 3141 |
|
| 3142 | if (ioarcb->add_cmd_param_length)
|
| 3143 | ioadl_count = DIV_ROUND_UP(le16_to_cpu(ioarcb->add_cmd_param_length), 16);
|
| 3144 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc) * sgcount);
|
| 3145 |
|
| 3146 | if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
|
| 3147 | |
| 3148 | * structure, re-using 24 out of 27 ioadls part of IOARCB.
|
| 3149 | * It is necessary to indicate to firmware that driver is
|
| 3150 | * using ioadls to be treated as external to IOARCB.
|
| 3151 |
|
| 3152 | ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
|
| 3153 | ioarcb->ioadl_bus_addr =
|
| 3154 | cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
| 3155 | offsetof(struct pmcraid_ioarcb,
|
| 3156 | add_data.u.ioadl[3]));
|
| 3157 | ioadl = &ioarcb->add_data.u.ioadl[3];
|
| 3158 | } else {
|
| 3159 | ioarcb->ioadl_bus_addr =
|
| 3160 | cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
| 3161 | offsetof(struct pmcraid_ioarcb,
|
| 3162 | add_data.u.ioadl[ioadl_count]));
|
| 3163 |
|
| 3164 | ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
|
| 3165 | ioarcb->ioarcb_bus_addr |=
|
| 3166 | cpu_to_le64(DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8));
|
| 3167 | }
|
| 3168 |
|
| 3169 | return ioadl;
|
| 3170 | }
|
| 3171 |
|
| 3172 | |
| 3173 | * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
|
| 3174 | * @pinstance: pointer to adapter instance structure
|
| 3175 | * @cmd: pmcraid command struct
|
| 3176 | *
|
| 3177 | * This function is invoked by queuecommand entry point while sending a command
|
| 3178 | * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
|
| 3179 | *
|
| 3180 | * Return value:
|
| 3181 | * 0 on success or -1 on failure
|
| 3182 |
|
| 3183 | static int pmcraid_build_ioadl(
|
| 3184 | struct pmcraid_instance *pinstance,
|
| 3185 | struct pmcraid_cmd *cmd
|
| 3186 | )
|
| 3187 | {
|
| 3188 | int i, nseg;
|
| 3189 | struct scatterlist *sglist;
|
| 3190 |
|
| 3191 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
|
| 3192 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
|
| 3193 | struct pmcraid_ioadl_desc *ioadl;
|
| 3194 |
|
| 3195 | u32 length = scsi_bufflen(scsi_cmd);
|
| 3196 |
|
| 3197 | if (!length)
|
| 3198 | return 0;
|
| 3199 |
|
| 3200 | nseg = scsi_dma_map(scsi_cmd);
|
| 3201 |
|
| 3202 | if (nseg < 0) {
|
| 3203 | scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
|
| 3204 | return -1;
|
| 3205 | } else if (nseg > PMCRAID_MAX_IOADLS) {
|
| 3206 | scsi_dma_unmap(scsi_cmd);
|
| 3207 | scmd_printk(KERN_ERR, scsi_cmd,
|
| 3208 | "sg count is (%d) more than allowed!\n", nseg);
|
| 3209 | return -1;
|
| 3210 | }
|
| 3211 |
|
| 3212 |
|
| 3213 | if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
|
| 3214 | ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
|
| 3215 |
|
| 3216 | ioarcb->request_flags0 |= NO_LINK_DESCS;
|
| 3217 | ioarcb->data_transfer_length = cpu_to_le32(length);
|
| 3218 | ioadl = pmcraid_init_ioadls(cmd, nseg);
|
| 3219 |
|
| 3220 |
|
| 3221 | scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
|
| 3222 | ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
|
| 3223 | ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
|
| 3224 | ioadl[i].flags = 0;
|
| 3225 | }
|
| 3226 |
|
| 3227 | ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
|
| 3228 |
|
| 3229 | return 0;
|
| 3230 | }
|
| 3231 |
|
| 3232 | |
| 3233 | * pmcraid_queuecommand_lck - Queue a mid-layer request
|
| 3234 | * @scsi_cmd: scsi command struct
|
| 3235 | *
|
| 3236 | * This function queues a request generated by the mid-layer. Midlayer calls
|
| 3237 | * this routine within host->lock. Some of the functions called by queuecommand
|
| 3238 | * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
|
| 3239 | *
|
| 3240 | * Return value:
|
| 3241 | * 0 on success
|
| 3242 | * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
|
| 3243 | * SCSI_MLQUEUE_HOST_BUSY if host is busy
|
| 3244 |
|
| 3245 | static enum scsi_qc_status pmcraid_queuecommand_lck(struct scsi_cmnd *scsi_cmd)
|
| 3246 | {
|
| 3247 | struct pmcraid_instance *pinstance;
|
| 3248 | struct pmcraid_resource_entry *res;
|
| 3249 | struct pmcraid_ioarcb *ioarcb;
|
| 3250 | enum scsi_qc_status rc = 0;
|
| 3251 | struct pmcraid_cmd *cmd;
|
| 3252 | u32 fw_version;
|
| 3253 |
|
| 3254 | pinstance =
|
| 3255 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
|
| 3256 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
|
| 3257 | res = scsi_cmd->device->hostdata;
|
| 3258 | scsi_cmd->result = (DID_OK << 16);
|
| 3259 |
|
| 3260 | |
| 3261 | * the command
|
| 3262 |
|
| 3263 | if (pinstance->ioa_state == IOA_STATE_DEAD) {
|
| 3264 | pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
|
| 3265 | scsi_cmd->result = (DID_NO_CONNECT << 16);
|
| 3266 | scsi_done(scsi_cmd);
|
| 3267 | return 0;
|
| 3268 | }
|
| 3269 |
|
| 3270 |
|
| 3271 | if (pinstance->ioa_reset_in_progress)
|
| 3272 | return SCSI_MLQUEUE_HOST_BUSY;
|
| 3273 |
|
| 3274 | |
| 3275 | * the command here itself with success return
|
| 3276 |
|
| 3277 | if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
|
| 3278 | pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
|
| 3279 | scsi_done(scsi_cmd);
|
| 3280 | return 0;
|
| 3281 | }
|
| 3282 |
|
| 3283 |
|
| 3284 | cmd = pmcraid_get_free_cmd(pinstance);
|
| 3285 |
|
| 3286 | if (cmd == NULL) {
|
| 3287 | pmcraid_err("free command block is not available\n");
|
| 3288 | return SCSI_MLQUEUE_HOST_BUSY;
|
| 3289 | }
|
| 3290 |
|
| 3291 | cmd->scsi_cmd = scsi_cmd;
|
| 3292 | ioarcb = &(cmd->ioa_cb->ioarcb);
|
| 3293 | memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
|
| 3294 | ioarcb->resource_handle = res->cfg_entry.resource_handle;
|
| 3295 | ioarcb->request_type = REQ_TYPE_SCSI;
|
| 3296 |
|
| 3297 | |
| 3298 | * generated internally uses hrrq_id 0, exception to this is the cmd
|
| 3299 | * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
|
| 3300 | * hrrq_id assigned here in queuecommand
|
| 3301 |
|
| 3302 | ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
|
| 3303 | pinstance->num_hrrq;
|
| 3304 | cmd->cmd_done = pmcraid_io_done;
|
| 3305 |
|
| 3306 | if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
|
| 3307 | if (scsi_cmd->underflow == 0)
|
| 3308 | ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
|
| 3309 |
|
| 3310 | if (res->sync_reqd) {
|
| 3311 | ioarcb->request_flags0 |= SYNC_COMPLETE;
|
| 3312 | res->sync_reqd = 0;
|
| 3313 | }
|
| 3314 |
|
| 3315 | ioarcb->request_flags0 |= NO_LINK_DESCS;
|
| 3316 |
|
| 3317 | if (scsi_cmd->flags & SCMD_TAGGED)
|
| 3318 | ioarcb->request_flags1 |= TASK_TAG_SIMPLE;
|
| 3319 |
|
| 3320 | if (RES_IS_GSCSI(res->cfg_entry))
|
| 3321 | ioarcb->request_flags1 |= DELAY_AFTER_RESET;
|
| 3322 | }
|
| 3323 |
|
| 3324 | rc = pmcraid_build_ioadl(pinstance, cmd);
|
| 3325 |
|
| 3326 | pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
|
| 3327 | le32_to_cpu(ioarcb->response_handle) >> 2,
|
| 3328 | scsi_cmd->cmnd[0], pinstance->host->unique_id,
|
| 3329 | RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
|
| 3330 | PMCRAID_PHYS_BUS_ID,
|
| 3331 | RES_IS_VSET(res->cfg_entry) ?
|
| 3332 | (fw_version <= PMCRAID_FW_VERSION_1 ?
|
| 3333 | res->cfg_entry.unique_flags1 :
|
| 3334 | le16_to_cpu(res->cfg_entry.array_id) & 0xFF) :
|
| 3335 | RES_TARGET(res->cfg_entry.resource_address),
|
| 3336 | RES_LUN(res->cfg_entry.resource_address));
|
| 3337 |
|
| 3338 | if (likely(rc == 0)) {
|
| 3339 | _pmcraid_fire_command(cmd);
|
| 3340 | } else {
|
| 3341 | pmcraid_err("queuecommand could not build ioadl\n");
|
| 3342 | pmcraid_return_cmd(cmd);
|
| 3343 | rc = SCSI_MLQUEUE_HOST_BUSY;
|
| 3344 | }
|
| 3345 |
|
| 3346 | return rc;
|
| 3347 | }
|
| 3348 |
|
| 3349 | static DEF_SCSI_QCMD(pmcraid_queuecommand)
|
| 3350 |
|
| 3351 | |
| 3352 | * pmcraid_open -char node "open" entry, allowed only users with admin access
|
| 3353 |
|
| 3354 | static int pmcraid_chr_open(struct inode *inode, struct file *filep)
|
| 3355 | {
|
| 3356 | struct pmcraid_instance *pinstance;
|
| 3357 |
|
| 3358 | if (!capable(CAP_SYS_ADMIN))
|
| 3359 | return -EACCES;
|
| 3360 |
|
| 3361 |
|
| 3362 | pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
|
| 3363 | filep->private_data = pinstance;
|
| 3364 |
|
| 3365 | return 0;
|
| 3366 | }
|
| 3367 |
|
| 3368 | |
| 3369 | * pmcraid_fasync - Async notifier registration from applications
|
| 3370 | *
|
| 3371 | * This function adds the calling process to a driver global queue. When an
|
| 3372 | * event occurs, SIGIO will be sent to all processes in this queue.
|
| 3373 |
|
| 3374 | static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
|
| 3375 | {
|
| 3376 | struct pmcraid_instance *pinstance;
|
| 3377 | int rc;
|
| 3378 |
|
| 3379 | pinstance = filep->private_data;
|
| 3380 | mutex_lock(&pinstance->aen_queue_lock);
|
| 3381 | rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
|
| 3382 | mutex_unlock(&pinstance->aen_queue_lock);
|
| 3383 |
|
| 3384 | return rc;
|
| 3385 | }
|
| 3386 |
|
| 3387 | |
| 3388 | * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
|
| 3389 | *
|
| 3390 | * @pinstance: pointer to adapter instance structure
|
| 3391 | * @cmd: ioctl command passed in
|
| 3392 | * @buflen: length of user_buffer
|
| 3393 | * @user_buffer: user buffer pointer
|
| 3394 | *
|
| 3395 | * Return Value
|
| 3396 | * 0 in case of success, otherwise appropriate error code
|
| 3397 |
|
| 3398 | static long pmcraid_ioctl_driver(
|
| 3399 | struct pmcraid_instance *pinstance,
|
| 3400 | unsigned int cmd,
|
| 3401 | unsigned int buflen,
|
| 3402 | void __user *user_buffer
|
| 3403 | )
|
| 3404 | {
|
| 3405 | int rc = -ENOSYS;
|
| 3406 |
|
| 3407 | switch (cmd) {
|
| 3408 | case PMCRAID_IOCTL_RESET_ADAPTER:
|
| 3409 | pmcraid_reset_bringup(pinstance);
|
| 3410 | rc = 0;
|
| 3411 | break;
|
| 3412 |
|
| 3413 | default:
|
| 3414 | break;
|
| 3415 | }
|
| 3416 |
|
| 3417 | return rc;
|
| 3418 | }
|
| 3419 |
|
| 3420 | |
| 3421 | * pmcraid_check_ioctl_buffer - check for proper access to user buffer
|
| 3422 | *
|
| 3423 | * @cmd: ioctl command
|
| 3424 | * @arg: user buffer
|
| 3425 | * @hdr: pointer to kernel memory for pmcraid_ioctl_header
|
| 3426 | *
|
| 3427 | * Return Value
|
| 3428 | * negetive error code if there are access issues, otherwise zero.
|
| 3429 | * Upon success, returns ioctl header copied out of user buffer.
|
| 3430 |
|
| 3431 |
|
| 3432 | static int pmcraid_check_ioctl_buffer(
|
| 3433 | int cmd,
|
| 3434 | void __user *arg,
|
| 3435 | struct pmcraid_ioctl_header *hdr
|
| 3436 | )
|
| 3437 | {
|
| 3438 | int rc;
|
| 3439 |
|
| 3440 | if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
|
| 3441 | pmcraid_err("couldn't copy ioctl header from user buffer\n");
|
| 3442 | return -EFAULT;
|
| 3443 | }
|
| 3444 |
|
| 3445 |
|
| 3446 | rc = memcmp(hdr->signature,
|
| 3447 | PMCRAID_IOCTL_SIGNATURE,
|
| 3448 | sizeof(hdr->signature));
|
| 3449 | if (rc) {
|
| 3450 | pmcraid_err("signature verification failed\n");
|
| 3451 | return -EINVAL;
|
| 3452 | }
|
| 3453 |
|
| 3454 | return 0;
|
| 3455 | }
|
| 3456 |
|
| 3457 | |
| 3458 | * pmcraid_ioctl - char node ioctl entry point
|
| 3459 |
|
| 3460 | static long pmcraid_chr_ioctl(
|
| 3461 | struct file *filep,
|
| 3462 | unsigned int cmd,
|
| 3463 | unsigned long arg
|
| 3464 | )
|
| 3465 | {
|
| 3466 | struct pmcraid_instance *pinstance = NULL;
|
| 3467 | struct pmcraid_ioctl_header *hdr = NULL;
|
| 3468 | void __user *argp = (void __user *)arg;
|
| 3469 | int retval = -ENOTTY;
|
| 3470 |
|
| 3471 | hdr = kmalloc_obj(struct pmcraid_ioctl_header);
|
| 3472 |
|
| 3473 | if (!hdr) {
|
| 3474 | pmcraid_err("failed to allocate memory for ioctl header\n");
|
| 3475 | return -ENOMEM;
|
| 3476 | }
|
| 3477 |
|
| 3478 | retval = pmcraid_check_ioctl_buffer(cmd, argp, hdr);
|
| 3479 |
|
| 3480 | if (retval) {
|
| 3481 | pmcraid_info("chr_ioctl: header check failed\n");
|
| 3482 | kfree(hdr);
|
| 3483 | return retval;
|
| 3484 | }
|
| 3485 |
|
| 3486 | pinstance = filep->private_data;
|
| 3487 |
|
| 3488 | if (!pinstance) {
|
| 3489 | pmcraid_info("adapter instance is not found\n");
|
| 3490 | kfree(hdr);
|
| 3491 | return -ENOTTY;
|
| 3492 | }
|
| 3493 |
|
| 3494 | switch (_IOC_TYPE(cmd)) {
|
| 3495 |
|
| 3496 | case PMCRAID_DRIVER_IOCTL:
|
| 3497 | arg += sizeof(struct pmcraid_ioctl_header);
|
| 3498 | retval = pmcraid_ioctl_driver(pinstance, cmd,
|
| 3499 | hdr->buffer_length, argp);
|
| 3500 | break;
|
| 3501 |
|
| 3502 | default:
|
| 3503 | retval = -ENOTTY;
|
| 3504 | break;
|
| 3505 | }
|
| 3506 |
|
| 3507 | kfree(hdr);
|
| 3508 |
|
| 3509 | return retval;
|
| 3510 | }
|
| 3511 |
|
| 3512 | |
| 3513 | * File operations structure for management interface
|
| 3514 |
|
| 3515 | static const struct file_operations pmcraid_fops = {
|
| 3516 | .owner = THIS_MODULE,
|
| 3517 | .open = pmcraid_chr_open,
|
| 3518 | .fasync = pmcraid_chr_fasync,
|
| 3519 | .unlocked_ioctl = pmcraid_chr_ioctl,
|
| 3520 | .compat_ioctl = compat_ptr_ioctl,
|
| 3521 | .llseek = noop_llseek,
|
| 3522 | };
|
| 3523 |
|
| 3524 |
|
| 3525 |
|
| 3526 |
|
| 3527 | |
| 3528 | * pmcraid_show_log_level - Display adapter's error logging level
|
| 3529 | * @dev: class device struct
|
| 3530 | * @attr: unused
|
| 3531 | * @buf: buffer
|
| 3532 | *
|
| 3533 | * Return value:
|
| 3534 | * number of bytes printed to buffer
|
| 3535 |
|
| 3536 | static ssize_t pmcraid_show_log_level(
|
| 3537 | struct device *dev,
|
| 3538 | struct device_attribute *attr,
|
| 3539 | char *buf)
|
| 3540 | {
|
| 3541 | struct Scsi_Host *shost = class_to_shost(dev);
|
| 3542 | struct pmcraid_instance *pinstance =
|
| 3543 | (struct pmcraid_instance *)shost->hostdata;
|
| 3544 | return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
|
| 3545 | }
|
| 3546 |
|
| 3547 | |
| 3548 | * pmcraid_store_log_level - Change the adapter's error logging level
|
| 3549 | * @dev: class device struct
|
| 3550 | * @attr: unused
|
| 3551 | * @buf: buffer
|
| 3552 | * @count: not used
|
| 3553 | *
|
| 3554 | * Return value:
|
| 3555 | * number of bytes printed to buffer
|
| 3556 |
|
| 3557 | static ssize_t pmcraid_store_log_level(
|
| 3558 | struct device *dev,
|
| 3559 | struct device_attribute *attr,
|
| 3560 | const char *buf,
|
| 3561 | size_t count
|
| 3562 | )
|
| 3563 | {
|
| 3564 | struct Scsi_Host *shost;
|
| 3565 | struct pmcraid_instance *pinstance;
|
| 3566 | u8 val;
|
| 3567 |
|
| 3568 | if (kstrtou8(buf, 10, &val))
|
| 3569 | return -EINVAL;
|
| 3570 |
|
| 3571 | if (val > 2)
|
| 3572 | return -EINVAL;
|
| 3573 |
|
| 3574 | shost = class_to_shost(dev);
|
| 3575 | pinstance = (struct pmcraid_instance *)shost->hostdata;
|
| 3576 | pinstance->current_log_level = val;
|
| 3577 |
|
| 3578 | return strlen(buf);
|
| 3579 | }
|
| 3580 |
|
| 3581 | static struct device_attribute pmcraid_log_level_attr = {
|
| 3582 | .attr = {
|
| 3583 | .name = "log_level",
|
| 3584 | .mode = S_IRUGO | S_IWUSR,
|
| 3585 | },
|
| 3586 | .show = pmcraid_show_log_level,
|
| 3587 | .store = pmcraid_store_log_level,
|
| 3588 | };
|
| 3589 |
|
| 3590 | |
| 3591 | * pmcraid_show_drv_version - Display driver version
|
| 3592 | * @dev: class device struct
|
| 3593 | * @attr: unused
|
| 3594 | * @buf: buffer
|
| 3595 | *
|
| 3596 | * Return value:
|
| 3597 | * number of bytes printed to buffer
|
| 3598 |
|
| 3599 | static ssize_t pmcraid_show_drv_version(
|
| 3600 | struct device *dev,
|
| 3601 | struct device_attribute *attr,
|
| 3602 | char *buf
|
| 3603 | )
|
| 3604 | {
|
| 3605 | return snprintf(buf, PAGE_SIZE, "version: %s\n",
|
| 3606 | PMCRAID_DRIVER_VERSION);
|
| 3607 | }
|
| 3608 |
|
| 3609 | static struct device_attribute pmcraid_driver_version_attr = {
|
| 3610 | .attr = {
|
| 3611 | .name = "drv_version",
|
| 3612 | .mode = S_IRUGO,
|
| 3613 | },
|
| 3614 | .show = pmcraid_show_drv_version,
|
| 3615 | };
|
| 3616 |
|
| 3617 | |
| 3618 | * pmcraid_show_adapter_id - Display driver assigned adapter id
|
| 3619 | * @dev: class device struct
|
| 3620 | * @attr: unused
|
| 3621 | * @buf: buffer
|
| 3622 | *
|
| 3623 | * Return value:
|
| 3624 | * number of bytes printed to buffer
|
| 3625 |
|
| 3626 | static ssize_t pmcraid_show_adapter_id(
|
| 3627 | struct device *dev,
|
| 3628 | struct device_attribute *attr,
|
| 3629 | char *buf
|
| 3630 | )
|
| 3631 | {
|
| 3632 | struct Scsi_Host *shost = class_to_shost(dev);
|
| 3633 | struct pmcraid_instance *pinstance =
|
| 3634 | (struct pmcraid_instance *)shost->hostdata;
|
| 3635 | u32 adapter_id = pci_dev_id(pinstance->pdev);
|
| 3636 | u32 aen_group = pmcraid_event_family.id;
|
| 3637 |
|
| 3638 | return snprintf(buf, PAGE_SIZE,
|
| 3639 | "adapter id: %d\nminor: %d\naen group: %d\n",
|
| 3640 | adapter_id, MINOR(pinstance->cdev.dev), aen_group);
|
| 3641 | }
|
| 3642 |
|
| 3643 | static struct device_attribute pmcraid_adapter_id_attr = {
|
| 3644 | .attr = {
|
| 3645 | .name = "adapter_id",
|
| 3646 | .mode = S_IRUGO,
|
| 3647 | },
|
| 3648 | .show = pmcraid_show_adapter_id,
|
| 3649 | };
|
| 3650 |
|
| 3651 | static struct attribute *pmcraid_host_attrs[] = {
|
| 3652 | &pmcraid_log_level_attr.attr,
|
| 3653 | &pmcraid_driver_version_attr.attr,
|
| 3654 | &pmcraid_adapter_id_attr.attr,
|
| 3655 | NULL,
|
| 3656 | };
|
| 3657 |
|
| 3658 | ATTRIBUTE_GROUPS(pmcraid_host);
|
| 3659 |
|
| 3660 |
|
| 3661 | static const struct scsi_host_template pmcraid_host_template = {
|
| 3662 | .module = THIS_MODULE,
|
| 3663 | .name = PMCRAID_DRIVER_NAME,
|
| 3664 | .queuecommand = pmcraid_queuecommand,
|
| 3665 | .eh_abort_handler = pmcraid_eh_abort_handler,
|
| 3666 | .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
|
| 3667 | .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
|
| 3668 | .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
|
| 3669 | .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
|
| 3670 |
|
| 3671 | .sdev_init = pmcraid_sdev_init,
|
| 3672 | .sdev_configure = pmcraid_sdev_configure,
|
| 3673 | .sdev_destroy = pmcraid_sdev_destroy,
|
| 3674 | .change_queue_depth = pmcraid_change_queue_depth,
|
| 3675 | .can_queue = PMCRAID_MAX_IO_CMD,
|
| 3676 | .this_id = -1,
|
| 3677 | .sg_tablesize = PMCRAID_MAX_IOADLS,
|
| 3678 | .max_sectors = PMCRAID_IOA_MAX_SECTORS,
|
| 3679 | .no_write_same = 1,
|
| 3680 | .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
|
| 3681 | .shost_groups = pmcraid_host_groups,
|
| 3682 | .proc_name = PMCRAID_DRIVER_NAME,
|
| 3683 | };
|
| 3684 |
|
| 3685 | |
| 3686 | * pmcraid_isr_msix - implements MSI-X interrupt handling routine
|
| 3687 | * @irq: interrupt vector number
|
| 3688 | * @dev_id: pointer hrrq_vector
|
| 3689 | *
|
| 3690 | * Return Value
|
| 3691 | * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
|
| 3692 |
|
| 3693 |
|
| 3694 | static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
|
| 3695 | {
|
| 3696 | struct pmcraid_isr_param *hrrq_vector;
|
| 3697 | struct pmcraid_instance *pinstance;
|
| 3698 | unsigned long lock_flags;
|
| 3699 | u32 intrs_val;
|
| 3700 | int hrrq_id;
|
| 3701 |
|
| 3702 | hrrq_vector = (struct pmcraid_isr_param *)dev_id;
|
| 3703 | hrrq_id = hrrq_vector->hrrq_id;
|
| 3704 | pinstance = hrrq_vector->drv_inst;
|
| 3705 |
|
| 3706 | if (!hrrq_id) {
|
| 3707 |
|
| 3708 | intrs_val = pmcraid_read_interrupts(pinstance);
|
| 3709 | if (intrs_val &&
|
| 3710 | ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
|
| 3711 | & DOORBELL_INTR_MSIX_CLR) == 0)) {
|
| 3712 | |
| 3713 | * initiate IOA reset.In case of unit check indicate
|
| 3714 | * to reset_sequence that IOA unit checked and prepare
|
| 3715 | * for a dump during reset sequence
|
| 3716 |
|
| 3717 | if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
|
| 3718 | if (intrs_val & INTRS_IOA_UNIT_CHECK)
|
| 3719 | pinstance->ioa_unit_check = 1;
|
| 3720 |
|
| 3721 | pmcraid_err("ISR: error interrupts: %x \
|
| 3722 | initiating reset\n", intrs_val);
|
| 3723 | spin_lock_irqsave(pinstance->host->host_lock,
|
| 3724 | lock_flags);
|
| 3725 | pmcraid_initiate_reset(pinstance);
|
| 3726 | spin_unlock_irqrestore(
|
| 3727 | pinstance->host->host_lock,
|
| 3728 | lock_flags);
|
| 3729 | }
|
| 3730 | |
| 3731 | * clear it. Delete the timer and wakeup the
|
| 3732 | * reset engine to proceed with reset sequence
|
| 3733 |
|
| 3734 | if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
|
| 3735 | pmcraid_clr_trans_op(pinstance);
|
| 3736 |
|
| 3737 | |
| 3738 | * to host to ioa doorbell. Once done
|
| 3739 | * FW will clear the interrupt.
|
| 3740 |
|
| 3741 | iowrite32(DOORBELL_INTR_MSIX_CLR,
|
| 3742 | pinstance->int_regs.host_ioa_interrupt_reg);
|
| 3743 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
| 3744 |
|
| 3745 |
|
| 3746 | }
|
| 3747 | }
|
| 3748 |
|
| 3749 | tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
|
| 3750 |
|
| 3751 | return IRQ_HANDLED;
|
| 3752 | }
|
| 3753 |
|
| 3754 | |
| 3755 | * pmcraid_isr - implements legacy interrupt handling routine
|
| 3756 | *
|
| 3757 | * @irq: interrupt vector number
|
| 3758 | * @dev_id: pointer hrrq_vector
|
| 3759 | *
|
| 3760 | * Return Value
|
| 3761 | * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
|
| 3762 |
|
| 3763 | static irqreturn_t pmcraid_isr(int irq, void *dev_id)
|
| 3764 | {
|
| 3765 | struct pmcraid_isr_param *hrrq_vector;
|
| 3766 | struct pmcraid_instance *pinstance;
|
| 3767 | u32 intrs;
|
| 3768 | unsigned long lock_flags;
|
| 3769 | int hrrq_id = 0;
|
| 3770 |
|
| 3771 | |
| 3772 | * isrs, it may be possible that the current interrupt is not from IOA
|
| 3773 |
|
| 3774 | if (!dev_id) {
|
| 3775 | printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
|
| 3776 | return IRQ_NONE;
|
| 3777 | }
|
| 3778 | hrrq_vector = (struct pmcraid_isr_param *)dev_id;
|
| 3779 | pinstance = hrrq_vector->drv_inst;
|
| 3780 |
|
| 3781 | intrs = pmcraid_read_interrupts(pinstance);
|
| 3782 |
|
| 3783 | if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
|
| 3784 | return IRQ_NONE;
|
| 3785 |
|
| 3786 | |
| 3787 | * In case of unit check indicate to reset_sequence that IOA unit
|
| 3788 | * checked and prepare for a dump during reset sequence
|
| 3789 |
|
| 3790 | if (intrs & PMCRAID_ERROR_INTERRUPTS) {
|
| 3791 |
|
| 3792 | if (intrs & INTRS_IOA_UNIT_CHECK)
|
| 3793 | pinstance->ioa_unit_check = 1;
|
| 3794 |
|
| 3795 | iowrite32(intrs,
|
| 3796 | pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
| 3797 | pmcraid_err("ISR: error interrupts: %x initiating reset\n",
|
| 3798 | intrs);
|
| 3799 | intrs = ioread32(
|
| 3800 | pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
| 3801 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
|
| 3802 | pmcraid_initiate_reset(pinstance);
|
| 3803 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
|
| 3804 | } else {
|
| 3805 | |
| 3806 | * clear. Delete the timer and wakeup the
|
| 3807 | * reset engine to proceed with reset sequence
|
| 3808 |
|
| 3809 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
|
| 3810 | pmcraid_clr_trans_op(pinstance);
|
| 3811 | } else {
|
| 3812 | iowrite32(intrs,
|
| 3813 | pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
| 3814 | ioread32(
|
| 3815 | pinstance->int_regs.ioa_host_interrupt_clr_reg);
|
| 3816 |
|
| 3817 | tasklet_schedule(
|
| 3818 | &(pinstance->isr_tasklet[hrrq_id]));
|
| 3819 | }
|
| 3820 | }
|
| 3821 |
|
| 3822 | return IRQ_HANDLED;
|
| 3823 | }
|
| 3824 |
|
| 3825 |
|
| 3826 | |
| 3827 | * pmcraid_worker_function - worker thread function
|
| 3828 | *
|
| 3829 | * @workp: pointer to struct work queue
|
| 3830 | *
|
| 3831 | * Return Value
|
| 3832 | * None
|
| 3833 |
|
| 3834 |
|
| 3835 | static void pmcraid_worker_function(struct work_struct *workp)
|
| 3836 | {
|
| 3837 | struct pmcraid_instance *pinstance;
|
| 3838 | struct pmcraid_resource_entry *res;
|
| 3839 | struct pmcraid_resource_entry *temp;
|
| 3840 | struct scsi_device *sdev;
|
| 3841 | unsigned long lock_flags;
|
| 3842 | unsigned long host_lock_flags;
|
| 3843 | u16 fw_version;
|
| 3844 | u8 bus, target, lun;
|
| 3845 |
|
| 3846 | pinstance = container_of(workp, struct pmcraid_instance, worker_q);
|
| 3847 |
|
| 3848 | if (!atomic_read(&pinstance->expose_resources))
|
| 3849 | return;
|
| 3850 |
|
| 3851 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
|
| 3852 |
|
| 3853 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
|
| 3854 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
|
| 3855 |
|
| 3856 | if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
|
| 3857 | sdev = res->scsi_dev;
|
| 3858 |
|
| 3859 | |
| 3860 | * scsi_device_get
|
| 3861 |
|
| 3862 | spin_lock_irqsave(pinstance->host->host_lock,
|
| 3863 | host_lock_flags);
|
| 3864 | if (!scsi_device_get(sdev)) {
|
| 3865 | spin_unlock_irqrestore(
|
| 3866 | pinstance->host->host_lock,
|
| 3867 | host_lock_flags);
|
| 3868 | pmcraid_info("deleting %x from midlayer\n",
|
| 3869 | res->cfg_entry.resource_address);
|
| 3870 | list_move_tail(&res->queue,
|
| 3871 | &pinstance->free_res_q);
|
| 3872 | spin_unlock_irqrestore(
|
| 3873 | &pinstance->resource_lock,
|
| 3874 | lock_flags);
|
| 3875 | scsi_remove_device(sdev);
|
| 3876 | scsi_device_put(sdev);
|
| 3877 | spin_lock_irqsave(&pinstance->resource_lock,
|
| 3878 | lock_flags);
|
| 3879 | res->change_detected = 0;
|
| 3880 | } else {
|
| 3881 | spin_unlock_irqrestore(
|
| 3882 | pinstance->host->host_lock,
|
| 3883 | host_lock_flags);
|
| 3884 | }
|
| 3885 | }
|
| 3886 | }
|
| 3887 |
|
| 3888 | list_for_each_entry(res, &pinstance->used_res_q, queue) {
|
| 3889 |
|
| 3890 | if (res->change_detected == RES_CHANGE_ADD) {
|
| 3891 |
|
| 3892 | if (!pmcraid_expose_resource(fw_version,
|
| 3893 | &res->cfg_entry))
|
| 3894 | continue;
|
| 3895 |
|
| 3896 | if (RES_IS_VSET(res->cfg_entry)) {
|
| 3897 | bus = PMCRAID_VSET_BUS_ID;
|
| 3898 | if (fw_version <= PMCRAID_FW_VERSION_1)
|
| 3899 | target = res->cfg_entry.unique_flags1;
|
| 3900 | else
|
| 3901 | target = le16_to_cpu(res->cfg_entry.array_id) & 0xFF;
|
| 3902 | lun = PMCRAID_VSET_LUN_ID;
|
| 3903 | } else {
|
| 3904 | bus = PMCRAID_PHYS_BUS_ID;
|
| 3905 | target =
|
| 3906 | RES_TARGET(
|
| 3907 | res->cfg_entry.resource_address);
|
| 3908 | lun = RES_LUN(res->cfg_entry.resource_address);
|
| 3909 | }
|
| 3910 |
|
| 3911 | res->change_detected = 0;
|
| 3912 | spin_unlock_irqrestore(&pinstance->resource_lock,
|
| 3913 | lock_flags);
|
| 3914 | scsi_add_device(pinstance->host, bus, target, lun);
|
| 3915 | spin_lock_irqsave(&pinstance->resource_lock,
|
| 3916 | lock_flags);
|
| 3917 | }
|
| 3918 | }
|
| 3919 |
|
| 3920 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
|
| 3921 | }
|
| 3922 |
|
| 3923 | |
| 3924 | * pmcraid_tasklet_function - Tasklet function
|
| 3925 | *
|
| 3926 | * @instance: pointer to msix param structure
|
| 3927 | *
|
| 3928 | * Return Value
|
| 3929 | * None
|
| 3930 |
|
| 3931 | static void pmcraid_tasklet_function(unsigned long instance)
|
| 3932 | {
|
| 3933 | struct pmcraid_isr_param *hrrq_vector;
|
| 3934 | struct pmcraid_instance *pinstance;
|
| 3935 | unsigned long hrrq_lock_flags;
|
| 3936 | unsigned long pending_lock_flags;
|
| 3937 | unsigned long host_lock_flags;
|
| 3938 | spinlock_t *lockp;
|
| 3939 | int id;
|
| 3940 | u32 resp;
|
| 3941 |
|
| 3942 | hrrq_vector = (struct pmcraid_isr_param *)instance;
|
| 3943 | pinstance = hrrq_vector->drv_inst;
|
| 3944 | id = hrrq_vector->hrrq_id;
|
| 3945 | lockp = &(pinstance->hrrq_lock[id]);
|
| 3946 |
|
| 3947 | |
| 3948 | * protected by its own lock. Traversals must be done within this lock
|
| 3949 | * as there may be multiple tasklets running on multiple CPUs. Note
|
| 3950 | * that the lock is held just for picking up the response handle and
|
| 3951 | * manipulating hrrq_curr/toggle_bit values.
|
| 3952 |
|
| 3953 | spin_lock_irqsave(lockp, hrrq_lock_flags);
|
| 3954 |
|
| 3955 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
|
| 3956 |
|
| 3957 | while ((resp & HRRQ_TOGGLE_BIT) ==
|
| 3958 | pinstance->host_toggle_bit[id]) {
|
| 3959 |
|
| 3960 | int cmd_index = resp >> 2;
|
| 3961 | struct pmcraid_cmd *cmd = NULL;
|
| 3962 |
|
| 3963 | if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
|
| 3964 | pinstance->hrrq_curr[id]++;
|
| 3965 | } else {
|
| 3966 | pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
|
| 3967 | pinstance->host_toggle_bit[id] ^= 1u;
|
| 3968 | }
|
| 3969 |
|
| 3970 | if (cmd_index >= PMCRAID_MAX_CMD) {
|
| 3971 |
|
| 3972 | pmcraid_err("Invalid response handle %d\n", cmd_index);
|
| 3973 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
|
| 3974 | continue;
|
| 3975 | }
|
| 3976 |
|
| 3977 | cmd = pinstance->cmd_list[cmd_index];
|
| 3978 | spin_unlock_irqrestore(lockp, hrrq_lock_flags);
|
| 3979 |
|
| 3980 | spin_lock_irqsave(&pinstance->pending_pool_lock,
|
| 3981 | pending_lock_flags);
|
| 3982 | list_del(&cmd->free_list);
|
| 3983 | spin_unlock_irqrestore(&pinstance->pending_pool_lock,
|
| 3984 | pending_lock_flags);
|
| 3985 | timer_delete(&cmd->timer);
|
| 3986 | atomic_dec(&pinstance->outstanding_cmds);
|
| 3987 |
|
| 3988 | if (cmd->cmd_done == pmcraid_ioa_reset) {
|
| 3989 | spin_lock_irqsave(pinstance->host->host_lock,
|
| 3990 | host_lock_flags);
|
| 3991 | cmd->cmd_done(cmd);
|
| 3992 | spin_unlock_irqrestore(pinstance->host->host_lock,
|
| 3993 | host_lock_flags);
|
| 3994 | } else if (cmd->cmd_done != NULL) {
|
| 3995 | cmd->cmd_done(cmd);
|
| 3996 | }
|
| 3997 |
|
| 3998 | spin_lock_irqsave(lockp, hrrq_lock_flags);
|
| 3999 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
|
| 4000 | }
|
| 4001 |
|
| 4002 | spin_unlock_irqrestore(lockp, hrrq_lock_flags);
|
| 4003 | }
|
| 4004 |
|
| 4005 | |
| 4006 | * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
|
| 4007 | * @pinstance: pointer to adapter instance structure
|
| 4008 | *
|
| 4009 | * This routine un-registers registered interrupt handler and
|
| 4010 | * also frees irqs/vectors.
|
| 4011 | *
|
| 4012 | * Return Value
|
| 4013 | * None
|
| 4014 |
|
| 4015 | static
|
| 4016 | void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
|
| 4017 | {
|
| 4018 | struct pci_dev *pdev = pinstance->pdev;
|
| 4019 | int i;
|
| 4020 |
|
| 4021 | for (i = 0; i < pinstance->num_hrrq; i++)
|
| 4022 | free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
|
| 4023 |
|
| 4024 | pinstance->interrupt_mode = 0;
|
| 4025 | pci_free_irq_vectors(pdev);
|
| 4026 | }
|
| 4027 |
|
| 4028 | |
| 4029 | * pmcraid_register_interrupt_handler - registers interrupt handler
|
| 4030 | * @pinstance: pointer to per-adapter instance structure
|
| 4031 | *
|
| 4032 | * Return Value
|
| 4033 | * 0 on success, non-zero error code otherwise.
|
| 4034 |
|
| 4035 | static int
|
| 4036 | pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
|
| 4037 | {
|
| 4038 | struct pci_dev *pdev = pinstance->pdev;
|
| 4039 | unsigned int irq_flag = PCI_IRQ_INTX, flag;
|
| 4040 | int num_hrrq, rc, i;
|
| 4041 | irq_handler_t isr;
|
| 4042 |
|
| 4043 | if (pmcraid_enable_msix)
|
| 4044 | irq_flag |= PCI_IRQ_MSIX;
|
| 4045 |
|
| 4046 | num_hrrq = pci_alloc_irq_vectors(pdev, 1, PMCRAID_NUM_MSIX_VECTORS,
|
| 4047 | irq_flag);
|
| 4048 | if (num_hrrq < 0)
|
| 4049 | return num_hrrq;
|
| 4050 |
|
| 4051 | if (pdev->msix_enabled) {
|
| 4052 | flag = 0;
|
| 4053 | isr = pmcraid_isr_msix;
|
| 4054 | } else {
|
| 4055 | flag = IRQF_SHARED;
|
| 4056 | isr = pmcraid_isr;
|
| 4057 | }
|
| 4058 |
|
| 4059 | for (i = 0; i < num_hrrq; i++) {
|
| 4060 | struct pmcraid_isr_param *vec = &pinstance->hrrq_vector[i];
|
| 4061 |
|
| 4062 | vec->hrrq_id = i;
|
| 4063 | vec->drv_inst = pinstance;
|
| 4064 | rc = request_irq(pci_irq_vector(pdev, i), isr, flag,
|
| 4065 | PMCRAID_DRIVER_NAME, vec);
|
| 4066 | if (rc)
|
| 4067 | goto out_unwind;
|
| 4068 | }
|
| 4069 |
|
| 4070 | pinstance->num_hrrq = num_hrrq;
|
| 4071 | if (pdev->msix_enabled) {
|
| 4072 | pinstance->interrupt_mode = 1;
|
| 4073 | iowrite32(DOORBELL_INTR_MODE_MSIX,
|
| 4074 | pinstance->int_regs.host_ioa_interrupt_reg);
|
| 4075 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
|
| 4076 | }
|
| 4077 |
|
| 4078 | return 0;
|
| 4079 |
|
| 4080 | out_unwind:
|
| 4081 | while (--i >= 0)
|
| 4082 | free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
|
| 4083 | pci_free_irq_vectors(pdev);
|
| 4084 | return rc;
|
| 4085 | }
|
| 4086 |
|
| 4087 | |
| 4088 | * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
|
| 4089 | * @pinstance: per adapter instance structure pointer
|
| 4090 | * @max_index: number of buffer blocks to release
|
| 4091 | *
|
| 4092 | * Return Value
|
| 4093 | * None
|
| 4094 |
|
| 4095 | static void
|
| 4096 | pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
|
| 4097 | {
|
| 4098 | int i;
|
| 4099 | for (i = 0; i < max_index; i++) {
|
| 4100 | kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
|
| 4101 | pinstance->cmd_list[i] = NULL;
|
| 4102 | }
|
| 4103 | kmem_cache_destroy(pinstance->cmd_cachep);
|
| 4104 | pinstance->cmd_cachep = NULL;
|
| 4105 | }
|
| 4106 |
|
| 4107 | |
| 4108 | * pmcraid_release_control_blocks - releases buffers alloced for control blocks
|
| 4109 | * @pinstance: pointer to per adapter instance structure
|
| 4110 | * @max_index: number of buffers (from 0 onwards) to release
|
| 4111 | *
|
| 4112 | * This function assumes that the command blocks for which control blocks are
|
| 4113 | * linked are not released.
|
| 4114 | *
|
| 4115 | * Return Value
|
| 4116 | * None
|
| 4117 |
|
| 4118 | static void
|
| 4119 | pmcraid_release_control_blocks(
|
| 4120 | struct pmcraid_instance *pinstance,
|
| 4121 | int max_index
|
| 4122 | )
|
| 4123 | {
|
| 4124 | int i;
|
| 4125 |
|
| 4126 | if (pinstance->control_pool == NULL)
|
| 4127 | return;
|
| 4128 |
|
| 4129 | for (i = 0; i < max_index; i++) {
|
| 4130 | dma_pool_free(pinstance->control_pool,
|
| 4131 | pinstance->cmd_list[i]->ioa_cb,
|
| 4132 | pinstance->cmd_list[i]->ioa_cb_bus_addr);
|
| 4133 | pinstance->cmd_list[i]->ioa_cb = NULL;
|
| 4134 | pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
|
| 4135 | }
|
| 4136 | dma_pool_destroy(pinstance->control_pool);
|
| 4137 | pinstance->control_pool = NULL;
|
| 4138 | }
|
| 4139 |
|
| 4140 | |
| 4141 | * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
|
| 4142 | * @pinstance: pointer to per adapter instance structure
|
| 4143 | *
|
| 4144 | * Allocates memory for command blocks using kernel slab allocator.
|
| 4145 | *
|
| 4146 | * Return Value
|
| 4147 | * 0 in case of success; -ENOMEM in case of failure
|
| 4148 |
|
| 4149 | static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
|
| 4150 | {
|
| 4151 | int i;
|
| 4152 |
|
| 4153 | sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
|
| 4154 | pinstance->host->unique_id);
|
| 4155 |
|
| 4156 |
|
| 4157 | pinstance->cmd_cachep = kmem_cache_create(
|
| 4158 | pinstance->cmd_pool_name,
|
| 4159 | sizeof(struct pmcraid_cmd), 0,
|
| 4160 | SLAB_HWCACHE_ALIGN, NULL);
|
| 4161 | if (!pinstance->cmd_cachep)
|
| 4162 | return -ENOMEM;
|
| 4163 |
|
| 4164 | for (i = 0; i < PMCRAID_MAX_CMD; i++) {
|
| 4165 | pinstance->cmd_list[i] =
|
| 4166 | kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
|
| 4167 | if (!pinstance->cmd_list[i]) {
|
| 4168 | pmcraid_release_cmd_blocks(pinstance, i);
|
| 4169 | return -ENOMEM;
|
| 4170 | }
|
| 4171 | }
|
| 4172 | return 0;
|
| 4173 | }
|
| 4174 |
|
| 4175 | |
| 4176 | * pmcraid_allocate_control_blocks - allocates memory control blocks
|
| 4177 | * @pinstance : pointer to per adapter instance structure
|
| 4178 | *
|
| 4179 | * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
|
| 4180 | * and IOASAs. This is called after command blocks are already allocated.
|
| 4181 | *
|
| 4182 | * Return Value
|
| 4183 | * 0 in case it can allocate all control blocks, otherwise -ENOMEM
|
| 4184 |
|
| 4185 | static int pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
|
| 4186 | {
|
| 4187 | int i;
|
| 4188 |
|
| 4189 | sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
|
| 4190 | pinstance->host->unique_id);
|
| 4191 |
|
| 4192 | pinstance->control_pool =
|
| 4193 | dma_pool_create(pinstance->ctl_pool_name,
|
| 4194 | &pinstance->pdev->dev,
|
| 4195 | sizeof(struct pmcraid_control_block),
|
| 4196 | PMCRAID_IOARCB_ALIGNMENT, 0);
|
| 4197 |
|
| 4198 | if (!pinstance->control_pool)
|
| 4199 | return -ENOMEM;
|
| 4200 |
|
| 4201 | for (i = 0; i < PMCRAID_MAX_CMD; i++) {
|
| 4202 | pinstance->cmd_list[i]->ioa_cb =
|
| 4203 | dma_pool_zalloc(
|
| 4204 | pinstance->control_pool,
|
| 4205 | GFP_KERNEL,
|
| 4206 | &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
|
| 4207 |
|
| 4208 | if (!pinstance->cmd_list[i]->ioa_cb) {
|
| 4209 | pmcraid_release_control_blocks(pinstance, i);
|
| 4210 | return -ENOMEM;
|
| 4211 | }
|
| 4212 | }
|
| 4213 | return 0;
|
| 4214 | }
|
| 4215 |
|
| 4216 | |
| 4217 | * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
|
| 4218 | * @pinstance: pointer to per adapter instance structure
|
| 4219 | * @maxindex: size of hrrq buffer pointer array
|
| 4220 | *
|
| 4221 | * Return Value
|
| 4222 | * None
|
| 4223 |
|
| 4224 | static void
|
| 4225 | pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
|
| 4226 | {
|
| 4227 | int i;
|
| 4228 |
|
| 4229 | for (i = 0; i < maxindex; i++) {
|
| 4230 | dma_free_coherent(&pinstance->pdev->dev,
|
| 4231 | HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
|
| 4232 | pinstance->hrrq_start[i],
|
| 4233 | pinstance->hrrq_start_bus_addr[i]);
|
| 4234 |
|
| 4235 |
|
| 4236 | pinstance->hrrq_start[i] = NULL;
|
| 4237 | pinstance->hrrq_start_bus_addr[i] = 0;
|
| 4238 | pinstance->host_toggle_bit[i] = 0;
|
| 4239 | }
|
| 4240 | }
|
| 4241 |
|
| 4242 | |
| 4243 | * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
|
| 4244 | * @pinstance: pointer to per adapter instance structure
|
| 4245 | *
|
| 4246 | * Return value
|
| 4247 | * 0 hrrq buffers are allocated, -ENOMEM otherwise.
|
| 4248 |
|
| 4249 | static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
|
| 4250 | {
|
| 4251 | int i, buffer_size;
|
| 4252 |
|
| 4253 | buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
|
| 4254 |
|
| 4255 | for (i = 0; i < pinstance->num_hrrq; i++) {
|
| 4256 | pinstance->hrrq_start[i] =
|
| 4257 | dma_alloc_coherent(&pinstance->pdev->dev, buffer_size,
|
| 4258 | &pinstance->hrrq_start_bus_addr[i],
|
| 4259 | GFP_KERNEL);
|
| 4260 | if (!pinstance->hrrq_start[i]) {
|
| 4261 | pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
|
| 4262 | i);
|
| 4263 | pmcraid_release_host_rrqs(pinstance, i);
|
| 4264 | return -ENOMEM;
|
| 4265 | }
|
| 4266 |
|
| 4267 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
|
| 4268 | pinstance->hrrq_end[i] =
|
| 4269 | pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
|
| 4270 | pinstance->host_toggle_bit[i] = 1;
|
| 4271 | spin_lock_init(&pinstance->hrrq_lock[i]);
|
| 4272 | }
|
| 4273 | return 0;
|
| 4274 | }
|
| 4275 |
|
| 4276 | |
| 4277 | * pmcraid_release_hcams - release HCAM buffers
|
| 4278 | *
|
| 4279 | * @pinstance: pointer to per adapter instance structure
|
| 4280 | *
|
| 4281 | * Return value
|
| 4282 | * none
|
| 4283 |
|
| 4284 | static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
|
| 4285 | {
|
| 4286 | if (pinstance->ccn.msg != NULL) {
|
| 4287 | dma_free_coherent(&pinstance->pdev->dev,
|
| 4288 | PMCRAID_AEN_HDR_SIZE +
|
| 4289 | sizeof(struct pmcraid_hcam_ccn_ext),
|
| 4290 | pinstance->ccn.msg,
|
| 4291 | pinstance->ccn.baddr);
|
| 4292 |
|
| 4293 | pinstance->ccn.msg = NULL;
|
| 4294 | pinstance->ccn.hcam = NULL;
|
| 4295 | pinstance->ccn.baddr = 0;
|
| 4296 | }
|
| 4297 |
|
| 4298 | if (pinstance->ldn.msg != NULL) {
|
| 4299 | dma_free_coherent(&pinstance->pdev->dev,
|
| 4300 | PMCRAID_AEN_HDR_SIZE +
|
| 4301 | sizeof(struct pmcraid_hcam_ldn),
|
| 4302 | pinstance->ldn.msg,
|
| 4303 | pinstance->ldn.baddr);
|
| 4304 |
|
| 4305 | pinstance->ldn.msg = NULL;
|
| 4306 | pinstance->ldn.hcam = NULL;
|
| 4307 | pinstance->ldn.baddr = 0;
|
| 4308 | }
|
| 4309 | }
|
| 4310 |
|
| 4311 | |
| 4312 | * pmcraid_allocate_hcams - allocates HCAM buffers
|
| 4313 | * @pinstance : pointer to per adapter instance structure
|
| 4314 | *
|
| 4315 | * Return Value:
|
| 4316 | * 0 in case of successful allocation, non-zero otherwise
|
| 4317 |
|
| 4318 | static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
|
| 4319 | {
|
| 4320 | pinstance->ccn.msg = dma_alloc_coherent(&pinstance->pdev->dev,
|
| 4321 | PMCRAID_AEN_HDR_SIZE +
|
| 4322 | sizeof(struct pmcraid_hcam_ccn_ext),
|
| 4323 | &pinstance->ccn.baddr, GFP_KERNEL);
|
| 4324 |
|
| 4325 | pinstance->ldn.msg = dma_alloc_coherent(&pinstance->pdev->dev,
|
| 4326 | PMCRAID_AEN_HDR_SIZE +
|
| 4327 | sizeof(struct pmcraid_hcam_ldn),
|
| 4328 | &pinstance->ldn.baddr, GFP_KERNEL);
|
| 4329 |
|
| 4330 | if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
|
| 4331 | pmcraid_release_hcams(pinstance);
|
| 4332 | } else {
|
| 4333 | pinstance->ccn.hcam =
|
| 4334 | (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
|
| 4335 | pinstance->ldn.hcam =
|
| 4336 | (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
|
| 4337 |
|
| 4338 | atomic_set(&pinstance->ccn.ignore, 0);
|
| 4339 | atomic_set(&pinstance->ldn.ignore, 0);
|
| 4340 | }
|
| 4341 |
|
| 4342 | return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
|
| 4343 | }
|
| 4344 |
|
| 4345 | |
| 4346 | * pmcraid_release_config_buffers - release config.table buffers
|
| 4347 | * @pinstance: pointer to per adapter instance structure
|
| 4348 | *
|
| 4349 | * Return Value
|
| 4350 | * none
|
| 4351 |
|
| 4352 | static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
|
| 4353 | {
|
| 4354 | if (pinstance->cfg_table != NULL &&
|
| 4355 | pinstance->cfg_table_bus_addr != 0) {
|
| 4356 | dma_free_coherent(&pinstance->pdev->dev,
|
| 4357 | sizeof(struct pmcraid_config_table),
|
| 4358 | pinstance->cfg_table,
|
| 4359 | pinstance->cfg_table_bus_addr);
|
| 4360 | pinstance->cfg_table = NULL;
|
| 4361 | pinstance->cfg_table_bus_addr = 0;
|
| 4362 | }
|
| 4363 |
|
| 4364 | if (pinstance->res_entries != NULL) {
|
| 4365 | int i;
|
| 4366 |
|
| 4367 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
|
| 4368 | list_del(&pinstance->res_entries[i].queue);
|
| 4369 | kfree(pinstance->res_entries);
|
| 4370 | pinstance->res_entries = NULL;
|
| 4371 | }
|
| 4372 |
|
| 4373 | pmcraid_release_hcams(pinstance);
|
| 4374 | }
|
| 4375 |
|
| 4376 | |
| 4377 | * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
|
| 4378 | * @pinstance : pointer to per adapter instance structure
|
| 4379 | *
|
| 4380 | * Return Value
|
| 4381 | * 0 for successful allocation, -ENOMEM for any failure
|
| 4382 |
|
| 4383 | static int pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
|
| 4384 | {
|
| 4385 | int i;
|
| 4386 |
|
| 4387 | pinstance->res_entries =
|
| 4388 | kzalloc_objs(struct pmcraid_resource_entry,
|
| 4389 | PMCRAID_MAX_RESOURCES);
|
| 4390 |
|
| 4391 | if (NULL == pinstance->res_entries) {
|
| 4392 | pmcraid_err("failed to allocate memory for resource table\n");
|
| 4393 | return -ENOMEM;
|
| 4394 | }
|
| 4395 |
|
| 4396 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
|
| 4397 | list_add_tail(&pinstance->res_entries[i].queue,
|
| 4398 | &pinstance->free_res_q);
|
| 4399 |
|
| 4400 | pinstance->cfg_table = dma_alloc_coherent(&pinstance->pdev->dev,
|
| 4401 | sizeof(struct pmcraid_config_table),
|
| 4402 | &pinstance->cfg_table_bus_addr,
|
| 4403 | GFP_KERNEL);
|
| 4404 |
|
| 4405 | if (NULL == pinstance->cfg_table) {
|
| 4406 | pmcraid_err("couldn't alloc DMA memory for config table\n");
|
| 4407 | pmcraid_release_config_buffers(pinstance);
|
| 4408 | return -ENOMEM;
|
| 4409 | }
|
| 4410 |
|
| 4411 | if (pmcraid_allocate_hcams(pinstance)) {
|
| 4412 | pmcraid_err("could not alloc DMA memory for HCAMS\n");
|
| 4413 | pmcraid_release_config_buffers(pinstance);
|
| 4414 | return -ENOMEM;
|
| 4415 | }
|
| 4416 |
|
| 4417 | return 0;
|
| 4418 | }
|
| 4419 |
|
| 4420 | |
| 4421 | * pmcraid_init_tasklets - registers tasklets for response handling
|
| 4422 | *
|
| 4423 | * @pinstance: pointer adapter instance structure
|
| 4424 | *
|
| 4425 | * Return value
|
| 4426 | * none
|
| 4427 |
|
| 4428 | static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
|
| 4429 | {
|
| 4430 | int i;
|
| 4431 | for (i = 0; i < pinstance->num_hrrq; i++)
|
| 4432 | tasklet_init(&pinstance->isr_tasklet[i],
|
| 4433 | pmcraid_tasklet_function,
|
| 4434 | (unsigned long)&pinstance->hrrq_vector[i]);
|
| 4435 | }
|
| 4436 |
|
| 4437 | |
| 4438 | * pmcraid_kill_tasklets - destroys tasklets registered for response handling
|
| 4439 | *
|
| 4440 | * @pinstance: pointer to adapter instance structure
|
| 4441 | *
|
| 4442 | * Return value
|
| 4443 | * none
|
| 4444 |
|
| 4445 | static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
|
| 4446 | {
|
| 4447 | int i;
|
| 4448 | for (i = 0; i < pinstance->num_hrrq; i++)
|
| 4449 | tasklet_kill(&pinstance->isr_tasklet[i]);
|
| 4450 | }
|
| 4451 |
|
| 4452 | |
| 4453 | * pmcraid_release_buffers - release per-adapter buffers allocated
|
| 4454 | *
|
| 4455 | * @pinstance: pointer to adapter soft state
|
| 4456 | *
|
| 4457 | * Return Value
|
| 4458 | * none
|
| 4459 |
|
| 4460 | static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
|
| 4461 | {
|
| 4462 | pmcraid_release_config_buffers(pinstance);
|
| 4463 | pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
|
| 4464 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
|
| 4465 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
|
| 4466 |
|
| 4467 | if (pinstance->inq_data != NULL) {
|
| 4468 | dma_free_coherent(&pinstance->pdev->dev,
|
| 4469 | sizeof(struct pmcraid_inquiry_data),
|
| 4470 | pinstance->inq_data,
|
| 4471 | pinstance->inq_data_baddr);
|
| 4472 |
|
| 4473 | pinstance->inq_data = NULL;
|
| 4474 | pinstance->inq_data_baddr = 0;
|
| 4475 | }
|
| 4476 |
|
| 4477 | if (pinstance->timestamp_data != NULL) {
|
| 4478 | dma_free_coherent(&pinstance->pdev->dev,
|
| 4479 | sizeof(struct pmcraid_timestamp_data),
|
| 4480 | pinstance->timestamp_data,
|
| 4481 | pinstance->timestamp_data_baddr);
|
| 4482 |
|
| 4483 | pinstance->timestamp_data = NULL;
|
| 4484 | pinstance->timestamp_data_baddr = 0;
|
| 4485 | }
|
| 4486 | }
|
| 4487 |
|
| 4488 | |
| 4489 | * pmcraid_init_buffers - allocates memory and initializes various structures
|
| 4490 | * @pinstance: pointer to per adapter instance structure
|
| 4491 | *
|
| 4492 | * This routine pre-allocates memory based on the type of block as below:
|
| 4493 | * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
|
| 4494 | * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
|
| 4495 | * config-table entries : DMAable memory using dma_alloc_coherent
|
| 4496 | * HostRRQs : DMAable memory, using dma_alloc_coherent
|
| 4497 | *
|
| 4498 | * Return Value
|
| 4499 | * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
|
| 4500 |
|
| 4501 | static int pmcraid_init_buffers(struct pmcraid_instance *pinstance)
|
| 4502 | {
|
| 4503 | int i;
|
| 4504 |
|
| 4505 | if (pmcraid_allocate_host_rrqs(pinstance)) {
|
| 4506 | pmcraid_err("couldn't allocate memory for %d host rrqs\n",
|
| 4507 | pinstance->num_hrrq);
|
| 4508 | return -ENOMEM;
|
| 4509 | }
|
| 4510 |
|
| 4511 | if (pmcraid_allocate_config_buffers(pinstance)) {
|
| 4512 | pmcraid_err("couldn't allocate memory for config buffers\n");
|
| 4513 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
|
| 4514 | return -ENOMEM;
|
| 4515 | }
|
| 4516 |
|
| 4517 | if (pmcraid_allocate_cmd_blocks(pinstance)) {
|
| 4518 | pmcraid_err("couldn't allocate memory for cmd blocks\n");
|
| 4519 | pmcraid_release_config_buffers(pinstance);
|
| 4520 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
|
| 4521 | return -ENOMEM;
|
| 4522 | }
|
| 4523 |
|
| 4524 | if (pmcraid_allocate_control_blocks(pinstance)) {
|
| 4525 | pmcraid_err("couldn't allocate memory control blocks\n");
|
| 4526 | pmcraid_release_config_buffers(pinstance);
|
| 4527 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
|
| 4528 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
|
| 4529 | return -ENOMEM;
|
| 4530 | }
|
| 4531 |
|
| 4532 |
|
| 4533 | pinstance->inq_data = dma_alloc_coherent(&pinstance->pdev->dev,
|
| 4534 | sizeof(struct pmcraid_inquiry_data),
|
| 4535 | &pinstance->inq_data_baddr, GFP_KERNEL);
|
| 4536 | if (pinstance->inq_data == NULL) {
|
| 4537 | pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
|
| 4538 | pmcraid_release_buffers(pinstance);
|
| 4539 | return -ENOMEM;
|
| 4540 | }
|
| 4541 |
|
| 4542 |
|
| 4543 | pinstance->timestamp_data = dma_alloc_coherent(&pinstance->pdev->dev,
|
| 4544 | sizeof(struct pmcraid_timestamp_data),
|
| 4545 | &pinstance->timestamp_data_baddr,
|
| 4546 | GFP_KERNEL);
|
| 4547 | if (pinstance->timestamp_data == NULL) {
|
| 4548 | pmcraid_err("couldn't allocate DMA memory for \
|
| 4549 | set time_stamp \n");
|
| 4550 | pmcraid_release_buffers(pinstance);
|
| 4551 | return -ENOMEM;
|
| 4552 | }
|
| 4553 |
|
| 4554 |
|
| 4555 | |
| 4556 | * need to lock (free_pool_lock) as this is done in initialization
|
| 4557 | * itself
|
| 4558 |
|
| 4559 | for (i = 0; i < PMCRAID_MAX_CMD; i++) {
|
| 4560 | struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
|
| 4561 | pmcraid_init_cmdblk(cmdp, i);
|
| 4562 | cmdp->drv_inst = pinstance;
|
| 4563 | list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
|
| 4564 | }
|
| 4565 |
|
| 4566 | return 0;
|
| 4567 | }
|
| 4568 |
|
| 4569 | |
| 4570 | * pmcraid_reinit_buffers - resets various buffer pointers
|
| 4571 | * @pinstance: pointer to adapter instance
|
| 4572 | * Return value
|
| 4573 | * none
|
| 4574 |
|
| 4575 | static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
|
| 4576 | {
|
| 4577 | int i;
|
| 4578 | int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
|
| 4579 |
|
| 4580 | for (i = 0; i < pinstance->num_hrrq; i++) {
|
| 4581 | memset(pinstance->hrrq_start[i], 0, buffer_size);
|
| 4582 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
|
| 4583 | pinstance->hrrq_end[i] =
|
| 4584 | pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
|
| 4585 | pinstance->host_toggle_bit[i] = 1;
|
| 4586 | }
|
| 4587 | }
|
| 4588 |
|
| 4589 | |
| 4590 | * pmcraid_init_instance - initialize per instance data structure
|
| 4591 | * @pdev: pointer to pci device structure
|
| 4592 | * @host: pointer to Scsi_Host structure
|
| 4593 | * @mapped_pci_addr: memory mapped IOA configuration registers
|
| 4594 | *
|
| 4595 | * Return Value
|
| 4596 | * 0 on success, non-zero in case of any failure
|
| 4597 |
|
| 4598 | static int pmcraid_init_instance(struct pci_dev *pdev, struct Scsi_Host *host,
|
| 4599 | void __iomem *mapped_pci_addr)
|
| 4600 | {
|
| 4601 | struct pmcraid_instance *pinstance =
|
| 4602 | (struct pmcraid_instance *)host->hostdata;
|
| 4603 |
|
| 4604 | pinstance->host = host;
|
| 4605 | pinstance->pdev = pdev;
|
| 4606 |
|
| 4607 |
|
| 4608 | pinstance->mapped_dma_addr = mapped_pci_addr;
|
| 4609 |
|
| 4610 |
|
| 4611 | {
|
| 4612 | struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
|
| 4613 | struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
|
| 4614 |
|
| 4615 | pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
|
| 4616 |
|
| 4617 | pint_regs->ioa_host_interrupt_reg =
|
| 4618 | mapped_pci_addr + chip_cfg->ioa_host_intr;
|
| 4619 | pint_regs->ioa_host_interrupt_clr_reg =
|
| 4620 | mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
|
| 4621 | pint_regs->ioa_host_msix_interrupt_reg =
|
| 4622 | mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
|
| 4623 | pint_regs->host_ioa_interrupt_reg =
|
| 4624 | mapped_pci_addr + chip_cfg->host_ioa_intr;
|
| 4625 | pint_regs->host_ioa_interrupt_clr_reg =
|
| 4626 | mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
|
| 4627 |
|
| 4628 | |
| 4629 | * and mask clr registers through memory mapped bar0.
|
| 4630 |
|
| 4631 | pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
|
| 4632 | pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
|
| 4633 | pint_regs->ioa_host_interrupt_mask_reg =
|
| 4634 | mapped_pci_addr + chip_cfg->ioa_host_mask;
|
| 4635 | pint_regs->ioa_host_interrupt_mask_clr_reg =
|
| 4636 | mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
|
| 4637 | pint_regs->global_interrupt_mask_reg =
|
| 4638 | mapped_pci_addr + chip_cfg->global_intr_mask;
|
| 4639 | }
|
| 4640 |
|
| 4641 | pinstance->ioa_reset_attempts = 0;
|
| 4642 | init_waitqueue_head(&pinstance->reset_wait_q);
|
| 4643 |
|
| 4644 | atomic_set(&pinstance->outstanding_cmds, 0);
|
| 4645 | atomic_set(&pinstance->last_message_id, 0);
|
| 4646 | atomic_set(&pinstance->expose_resources, 0);
|
| 4647 |
|
| 4648 | INIT_LIST_HEAD(&pinstance->free_res_q);
|
| 4649 | INIT_LIST_HEAD(&pinstance->used_res_q);
|
| 4650 | INIT_LIST_HEAD(&pinstance->free_cmd_pool);
|
| 4651 | INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
|
| 4652 |
|
| 4653 | spin_lock_init(&pinstance->free_pool_lock);
|
| 4654 | spin_lock_init(&pinstance->pending_pool_lock);
|
| 4655 | spin_lock_init(&pinstance->resource_lock);
|
| 4656 | mutex_init(&pinstance->aen_queue_lock);
|
| 4657 |
|
| 4658 |
|
| 4659 | INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
|
| 4660 |
|
| 4661 |
|
| 4662 | pinstance->current_log_level = pmcraid_log_level;
|
| 4663 |
|
| 4664 |
|
| 4665 | pinstance->ioa_state = IOA_STATE_UNKNOWN;
|
| 4666 | pinstance->reset_cmd = NULL;
|
| 4667 | return 0;
|
| 4668 | }
|
| 4669 |
|
| 4670 | |
| 4671 | * pmcraid_shutdown - shutdown adapter controller.
|
| 4672 | * @pdev: pci device struct
|
| 4673 | *
|
| 4674 | * Issues an adapter shutdown to the card waits for its completion
|
| 4675 | *
|
| 4676 | * Return value
|
| 4677 | * none
|
| 4678 |
|
| 4679 | static void pmcraid_shutdown(struct pci_dev *pdev)
|
| 4680 | {
|
| 4681 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
|
| 4682 | pmcraid_reset_bringdown(pinstance);
|
| 4683 | }
|
| 4684 |
|
| 4685 |
|
| 4686 | |
| 4687 | * pmcraid_get_minor - returns unused minor number from minor number bitmap
|
| 4688 |
|
| 4689 | static unsigned short pmcraid_get_minor(void)
|
| 4690 | {
|
| 4691 | int minor;
|
| 4692 |
|
| 4693 | minor = find_first_zero_bit(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
|
| 4694 | __set_bit(minor, pmcraid_minor);
|
| 4695 | return minor;
|
| 4696 | }
|
| 4697 |
|
| 4698 | |
| 4699 | * pmcraid_release_minor - releases given minor back to minor number bitmap
|
| 4700 |
|
| 4701 | static void pmcraid_release_minor(unsigned short minor)
|
| 4702 | {
|
| 4703 | __clear_bit(minor, pmcraid_minor);
|
| 4704 | }
|
| 4705 |
|
| 4706 | |
| 4707 | * pmcraid_setup_chrdev - allocates a minor number and registers a char device
|
| 4708 | *
|
| 4709 | * @pinstance: pointer to adapter instance for which to register device
|
| 4710 | *
|
| 4711 | * Return value
|
| 4712 | * 0 in case of success, otherwise non-zero
|
| 4713 |
|
| 4714 | static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
|
| 4715 | {
|
| 4716 | int minor;
|
| 4717 | int error;
|
| 4718 |
|
| 4719 | minor = pmcraid_get_minor();
|
| 4720 | cdev_init(&pinstance->cdev, &pmcraid_fops);
|
| 4721 | pinstance->cdev.owner = THIS_MODULE;
|
| 4722 |
|
| 4723 | error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
|
| 4724 |
|
| 4725 | if (error)
|
| 4726 | pmcraid_release_minor(minor);
|
| 4727 | else
|
| 4728 | device_create(&pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
|
| 4729 | NULL, "%s%u", PMCRAID_DEVFILE, minor);
|
| 4730 | return error;
|
| 4731 | }
|
| 4732 |
|
| 4733 | |
| 4734 | * pmcraid_release_chrdev - unregisters per-adapter management interface
|
| 4735 | *
|
| 4736 | * @pinstance: pointer to adapter instance structure
|
| 4737 | *
|
| 4738 | * Return value
|
| 4739 | * none
|
| 4740 |
|
| 4741 | static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
|
| 4742 | {
|
| 4743 | pmcraid_release_minor(MINOR(pinstance->cdev.dev));
|
| 4744 | device_destroy(&pmcraid_class,
|
| 4745 | MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
|
| 4746 | cdev_del(&pinstance->cdev);
|
| 4747 | }
|
| 4748 |
|
| 4749 | |
| 4750 | * pmcraid_remove - IOA hot plug remove entry point
|
| 4751 | * @pdev: pci device struct
|
| 4752 | *
|
| 4753 | * Return value
|
| 4754 | * none
|
| 4755 |
|
| 4756 | static void pmcraid_remove(struct pci_dev *pdev)
|
| 4757 | {
|
| 4758 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
|
| 4759 |
|
| 4760 |
|
| 4761 | pmcraid_release_chrdev(pinstance);
|
| 4762 |
|
| 4763 |
|
| 4764 | scsi_remove_host(pinstance->host);
|
| 4765 |
|
| 4766 |
|
| 4767 | scsi_block_requests(pinstance->host);
|
| 4768 |
|
| 4769 |
|
| 4770 | pmcraid_shutdown(pdev);
|
| 4771 |
|
| 4772 | pmcraid_disable_interrupts(pinstance, ~0);
|
| 4773 | flush_work(&pinstance->worker_q);
|
| 4774 |
|
| 4775 | pmcraid_kill_tasklets(pinstance);
|
| 4776 | pmcraid_unregister_interrupt_handler(pinstance);
|
| 4777 | pmcraid_release_buffers(pinstance);
|
| 4778 | iounmap(pinstance->mapped_dma_addr);
|
| 4779 | pci_release_regions(pdev);
|
| 4780 | scsi_host_put(pinstance->host);
|
| 4781 | pci_disable_device(pdev);
|
| 4782 |
|
| 4783 | return;
|
| 4784 | }
|
| 4785 |
|
| 4786 | |
| 4787 | * pmcraid_suspend - driver suspend entry point for power management
|
| 4788 | * @dev: Device structure
|
| 4789 | *
|
| 4790 | * Return Value - 0 always
|
| 4791 |
|
| 4792 | static int __maybe_unused pmcraid_suspend(struct device *dev)
|
| 4793 | {
|
| 4794 | struct pci_dev *pdev = to_pci_dev(dev);
|
| 4795 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
|
| 4796 |
|
| 4797 | pmcraid_shutdown(pdev);
|
| 4798 | pmcraid_disable_interrupts(pinstance, ~0);
|
| 4799 | pmcraid_kill_tasklets(pinstance);
|
| 4800 | pmcraid_unregister_interrupt_handler(pinstance);
|
| 4801 |
|
| 4802 | return 0;
|
| 4803 | }
|
| 4804 |
|
| 4805 | |
| 4806 | * pmcraid_resume - driver resume entry point PCI power management
|
| 4807 | * @dev: Device structure
|
| 4808 | *
|
| 4809 | * Return Value - 0 in case of success. Error code in case of any failure
|
| 4810 |
|
| 4811 | static int __maybe_unused pmcraid_resume(struct device *dev)
|
| 4812 | {
|
| 4813 | struct pci_dev *pdev = to_pci_dev(dev);
|
| 4814 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
|
| 4815 | struct Scsi_Host *host = pinstance->host;
|
| 4816 | int rc = 0;
|
| 4817 |
|
| 4818 | if (sizeof(dma_addr_t) == 4 ||
|
| 4819 | dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
|
| 4820 | rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
|
| 4821 |
|
| 4822 | if (rc == 0)
|
| 4823 | rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
|
| 4824 |
|
| 4825 | if (rc != 0) {
|
| 4826 | dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
|
| 4827 | goto disable_device;
|
| 4828 | }
|
| 4829 |
|
| 4830 | pmcraid_disable_interrupts(pinstance, ~0);
|
| 4831 | atomic_set(&pinstance->outstanding_cmds, 0);
|
| 4832 | rc = pmcraid_register_interrupt_handler(pinstance);
|
| 4833 |
|
| 4834 | if (rc) {
|
| 4835 | dev_err(&pdev->dev,
|
| 4836 | "resume: couldn't register interrupt handlers\n");
|
| 4837 | rc = -ENODEV;
|
| 4838 | goto release_host;
|
| 4839 | }
|
| 4840 |
|
| 4841 | pmcraid_init_tasklets(pinstance);
|
| 4842 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
|
| 4843 |
|
| 4844 | |
| 4845 | * state as well as completes the reset sequence.
|
| 4846 |
|
| 4847 | pinstance->ioa_hard_reset = 1;
|
| 4848 |
|
| 4849 | |
| 4850 | * state.
|
| 4851 |
|
| 4852 | if (pmcraid_reset_bringup(pinstance)) {
|
| 4853 | dev_err(&pdev->dev, "couldn't initialize IOA\n");
|
| 4854 | rc = -ENODEV;
|
| 4855 | goto release_tasklets;
|
| 4856 | }
|
| 4857 |
|
| 4858 | return 0;
|
| 4859 |
|
| 4860 | release_tasklets:
|
| 4861 | pmcraid_disable_interrupts(pinstance, ~0);
|
| 4862 | pmcraid_kill_tasklets(pinstance);
|
| 4863 | pmcraid_unregister_interrupt_handler(pinstance);
|
| 4864 |
|
| 4865 | release_host:
|
| 4866 | scsi_host_put(host);
|
| 4867 |
|
| 4868 | disable_device:
|
| 4869 |
|
| 4870 | return rc;
|
| 4871 | }
|
| 4872 |
|
| 4873 | |
| 4874 | * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
|
| 4875 | * completion of the ioa reset
|
| 4876 | * @cmd: pointer to reset command block
|
| 4877 |
|
| 4878 | static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
|
| 4879 | {
|
| 4880 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 4881 | unsigned long flags;
|
| 4882 |
|
| 4883 | spin_lock_irqsave(pinstance->host->host_lock, flags);
|
| 4884 | pmcraid_ioa_reset(cmd);
|
| 4885 | spin_unlock_irqrestore(pinstance->host->host_lock, flags);
|
| 4886 | scsi_unblock_requests(pinstance->host);
|
| 4887 | schedule_work(&pinstance->worker_q);
|
| 4888 | }
|
| 4889 |
|
| 4890 | |
| 4891 | * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
|
| 4892 | *
|
| 4893 | * @cmd: pointer to pmcraid_cmd structure
|
| 4894 | *
|
| 4895 | * Return Value
|
| 4896 | * 0 for success or non-zero for failure cases
|
| 4897 |
|
| 4898 | static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
|
| 4899 | {
|
| 4900 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
| 4901 | void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
|
| 4902 |
|
| 4903 | pmcraid_reinit_cmdblk(cmd);
|
| 4904 |
|
| 4905 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
| 4906 | ioarcb->request_type = REQ_TYPE_IOACMD;
|
| 4907 | ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
|
| 4908 | ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
|
| 4909 |
|
| 4910 | |
| 4911 | * lost CCN, it is enough to return the command block back to free pool
|
| 4912 | * as part of set_supported_devs completion function.
|
| 4913 |
|
| 4914 | if (cmd->drv_inst->reinit_cfg_table) {
|
| 4915 | cmd->drv_inst->reinit_cfg_table = 0;
|
| 4916 | cmd->release = 1;
|
| 4917 | cmd_done = pmcraid_reinit_cfgtable_done;
|
| 4918 | }
|
| 4919 |
|
| 4920 | |
| 4921 | * setup the done function to return the command block back to free
|
| 4922 | * pool
|
| 4923 |
|
| 4924 | pmcraid_send_cmd(cmd,
|
| 4925 | cmd_done,
|
| 4926 | PMCRAID_SET_SUP_DEV_TIMEOUT,
|
| 4927 | pmcraid_timeout_handler);
|
| 4928 | return;
|
| 4929 | }
|
| 4930 |
|
| 4931 | |
| 4932 | * pmcraid_set_timestamp - set the timestamp to IOAFP
|
| 4933 | *
|
| 4934 | * @cmd: pointer to pmcraid_cmd structure
|
| 4935 | *
|
| 4936 | * Return Value
|
| 4937 | * 0 for success or non-zero for failure cases
|
| 4938 |
|
| 4939 | static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
|
| 4940 | {
|
| 4941 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 4942 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
| 4943 | __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
|
| 4944 | struct pmcraid_ioadl_desc *ioadl;
|
| 4945 | u64 timestamp;
|
| 4946 |
|
| 4947 | timestamp = ktime_get_real_seconds() * 1000;
|
| 4948 |
|
| 4949 | pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
|
| 4950 | pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
|
| 4951 | pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
|
| 4952 | pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
|
| 4953 | pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
|
| 4954 | pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
|
| 4955 |
|
| 4956 | pmcraid_reinit_cmdblk(cmd);
|
| 4957 | ioarcb->request_type = REQ_TYPE_SCSI;
|
| 4958 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
| 4959 | ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
|
| 4960 | ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
|
| 4961 | memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
|
| 4962 |
|
| 4963 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
| 4964 | offsetof(struct pmcraid_ioarcb,
|
| 4965 | add_data.u.ioadl[0]));
|
| 4966 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
| 4967 | ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
|
| 4968 |
|
| 4969 | ioarcb->request_flags0 |= NO_LINK_DESCS;
|
| 4970 | ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
|
| 4971 | ioarcb->data_transfer_length =
|
| 4972 | cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
|
| 4973 | ioadl = &(ioarcb->add_data.u.ioadl[0]);
|
| 4974 | ioadl->flags = IOADL_FLAGS_LAST_DESC;
|
| 4975 | ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
|
| 4976 | ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
|
| 4977 |
|
| 4978 | if (!pinstance->timestamp_error) {
|
| 4979 | pinstance->timestamp_error = 0;
|
| 4980 | pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
|
| 4981 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
|
| 4982 | } else {
|
| 4983 | pmcraid_send_cmd(cmd, pmcraid_return_cmd,
|
| 4984 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
|
| 4985 | return;
|
| 4986 | }
|
| 4987 | }
|
| 4988 |
|
| 4989 |
|
| 4990 | |
| 4991 | * pmcraid_init_res_table - Initialize the resource table
|
| 4992 | * @cmd: pointer to pmcraid command struct
|
| 4993 | *
|
| 4994 | * This function looks through the existing resource table, comparing
|
| 4995 | * it with the config table. This function will take care of old/new
|
| 4996 | * devices and schedule adding/removing them from the mid-layer
|
| 4997 | * as appropriate.
|
| 4998 | *
|
| 4999 | * Return value
|
| 5000 | * None
|
| 5001 |
|
| 5002 | static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
|
| 5003 | {
|
| 5004 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 5005 | struct pmcraid_resource_entry *res, *temp;
|
| 5006 | struct pmcraid_config_table_entry *cfgte;
|
| 5007 | unsigned long lock_flags;
|
| 5008 | int found, rc, i;
|
| 5009 | u16 fw_version;
|
| 5010 | LIST_HEAD(old_res);
|
| 5011 |
|
| 5012 | if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
|
| 5013 | pmcraid_err("IOA requires microcode download\n");
|
| 5014 |
|
| 5015 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
|
| 5016 |
|
| 5017 | |
| 5018 | * init_res_table can be called from probe (user-thread) or runtime
|
| 5019 | * reset (timer/tasklet)
|
| 5020 |
|
| 5021 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
|
| 5022 |
|
| 5023 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
|
| 5024 | list_move_tail(&res->queue, &old_res);
|
| 5025 |
|
| 5026 | for (i = 0; i < le16_to_cpu(pinstance->cfg_table->num_entries); i++) {
|
| 5027 | if (be16_to_cpu(pinstance->inq_data->fw_version) <=
|
| 5028 | PMCRAID_FW_VERSION_1)
|
| 5029 | cfgte = &pinstance->cfg_table->entries[i];
|
| 5030 | else
|
| 5031 | cfgte = (struct pmcraid_config_table_entry *)
|
| 5032 | &pinstance->cfg_table->entries_ext[i];
|
| 5033 |
|
| 5034 | if (!pmcraid_expose_resource(fw_version, cfgte))
|
| 5035 | continue;
|
| 5036 |
|
| 5037 | found = 0;
|
| 5038 |
|
| 5039 |
|
| 5040 | list_for_each_entry_safe(res, temp, &old_res, queue) {
|
| 5041 |
|
| 5042 | rc = memcmp(&res->cfg_entry.resource_address,
|
| 5043 | &cfgte->resource_address,
|
| 5044 | sizeof(cfgte->resource_address));
|
| 5045 | if (!rc) {
|
| 5046 | list_move_tail(&res->queue,
|
| 5047 | &pinstance->used_res_q);
|
| 5048 | found = 1;
|
| 5049 | break;
|
| 5050 | }
|
| 5051 | }
|
| 5052 |
|
| 5053 |
|
| 5054 | if (!found) {
|
| 5055 |
|
| 5056 | if (list_empty(&pinstance->free_res_q)) {
|
| 5057 | pmcraid_err("Too many devices attached\n");
|
| 5058 | break;
|
| 5059 | }
|
| 5060 |
|
| 5061 | found = 1;
|
| 5062 | res = list_entry(pinstance->free_res_q.next,
|
| 5063 | struct pmcraid_resource_entry, queue);
|
| 5064 |
|
| 5065 | res->scsi_dev = NULL;
|
| 5066 | res->change_detected = RES_CHANGE_ADD;
|
| 5067 | res->reset_progress = 0;
|
| 5068 | list_move_tail(&res->queue, &pinstance->used_res_q);
|
| 5069 | }
|
| 5070 |
|
| 5071 | |
| 5072 | * maintained resource entry
|
| 5073 |
|
| 5074 | if (found) {
|
| 5075 | memcpy(&res->cfg_entry, cfgte,
|
| 5076 | pinstance->config_table_entry_size);
|
| 5077 | pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
|
| 5078 | res->cfg_entry.resource_type,
|
| 5079 | (fw_version <= PMCRAID_FW_VERSION_1 ?
|
| 5080 | res->cfg_entry.unique_flags1 :
|
| 5081 | le16_to_cpu(res->cfg_entry.array_id) & 0xFF),
|
| 5082 | le32_to_cpu(res->cfg_entry.resource_address));
|
| 5083 | }
|
| 5084 | }
|
| 5085 |
|
| 5086 |
|
| 5087 | list_for_each_entry_safe(res, temp, &old_res, queue) {
|
| 5088 |
|
| 5089 | if (res->scsi_dev) {
|
| 5090 | res->change_detected = RES_CHANGE_DEL;
|
| 5091 | res->cfg_entry.resource_handle =
|
| 5092 | PMCRAID_INVALID_RES_HANDLE;
|
| 5093 | list_move_tail(&res->queue, &pinstance->used_res_q);
|
| 5094 | } else {
|
| 5095 | list_move_tail(&res->queue, &pinstance->free_res_q);
|
| 5096 | }
|
| 5097 | }
|
| 5098 |
|
| 5099 |
|
| 5100 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
|
| 5101 | pmcraid_set_timestamp(cmd);
|
| 5102 | }
|
| 5103 |
|
| 5104 | |
| 5105 | * pmcraid_querycfg - Send a Query IOA Config to the adapter.
|
| 5106 | * @cmd: pointer pmcraid_cmd struct
|
| 5107 | *
|
| 5108 | * This function sends a Query IOA Configuration command to the adapter to
|
| 5109 | * retrieve the IOA configuration table.
|
| 5110 | *
|
| 5111 | * Return value:
|
| 5112 | * none
|
| 5113 |
|
| 5114 | static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
|
| 5115 | {
|
| 5116 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
|
| 5117 | struct pmcraid_ioadl_desc *ioadl;
|
| 5118 | struct pmcraid_instance *pinstance = cmd->drv_inst;
|
| 5119 | __be32 cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
|
| 5120 |
|
| 5121 | if (be16_to_cpu(pinstance->inq_data->fw_version) <=
|
| 5122 | PMCRAID_FW_VERSION_1)
|
| 5123 | pinstance->config_table_entry_size =
|
| 5124 | sizeof(struct pmcraid_config_table_entry);
|
| 5125 | else
|
| 5126 | pinstance->config_table_entry_size =
|
| 5127 | sizeof(struct pmcraid_config_table_entry_ext);
|
| 5128 |
|
| 5129 | ioarcb->request_type = REQ_TYPE_IOACMD;
|
| 5130 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
|
| 5131 |
|
| 5132 | ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
|
| 5133 |
|
| 5134 |
|
| 5135 | memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
|
| 5136 |
|
| 5137 | |
| 5138 | * be part of IOARCB itself
|
| 5139 |
|
| 5140 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
|
| 5141 | offsetof(struct pmcraid_ioarcb,
|
| 5142 | add_data.u.ioadl[0]));
|
| 5143 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
|
| 5144 | ioarcb->ioarcb_bus_addr &= cpu_to_le64(~0x1FULL);
|
| 5145 |
|
| 5146 | ioarcb->request_flags0 |= NO_LINK_DESCS;
|
| 5147 | ioarcb->data_transfer_length =
|
| 5148 | cpu_to_le32(sizeof(struct pmcraid_config_table));
|
| 5149 |
|
| 5150 | ioadl = &(ioarcb->add_data.u.ioadl[0]);
|
| 5151 | ioadl->flags = IOADL_FLAGS_LAST_DESC;
|
| 5152 | ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
|
| 5153 | ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
|
| 5154 |
|
| 5155 | pmcraid_send_cmd(cmd, pmcraid_init_res_table,
|
| 5156 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
|
| 5157 | }
|
| 5158 |
|
| 5159 |
|
| 5160 | |
| 5161 | * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
|
| 5162 | * @pdev: pointer to pci device structure
|
| 5163 | * @dev_id: pointer to device ids structure
|
| 5164 | *
|
| 5165 | * Return Value
|
| 5166 | * returns 0 if the device is claimed and successfully configured.
|
| 5167 | * returns non-zero error code in case of any failure
|
| 5168 |
|
| 5169 | static int pmcraid_probe(struct pci_dev *pdev,
|
| 5170 | const struct pci_device_id *dev_id)
|
| 5171 | {
|
| 5172 | struct pmcraid_instance *pinstance;
|
| 5173 | struct Scsi_Host *host;
|
| 5174 | void __iomem *mapped_pci_addr;
|
| 5175 | int rc = PCIBIOS_SUCCESSFUL;
|
| 5176 |
|
| 5177 | if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
|
| 5178 | pmcraid_err
|
| 5179 | ("maximum number(%d) of supported adapters reached\n",
|
| 5180 | atomic_read(&pmcraid_adapter_count));
|
| 5181 | return -ENOMEM;
|
| 5182 | }
|
| 5183 |
|
| 5184 | atomic_inc(&pmcraid_adapter_count);
|
| 5185 | rc = pci_enable_device(pdev);
|
| 5186 |
|
| 5187 | if (rc) {
|
| 5188 | dev_err(&pdev->dev, "Cannot enable adapter\n");
|
| 5189 | atomic_dec(&pmcraid_adapter_count);
|
| 5190 | return rc;
|
| 5191 | }
|
| 5192 |
|
| 5193 | dev_info(&pdev->dev,
|
| 5194 | "Found new IOA(%x:%x), Total IOA count: %d\n",
|
| 5195 | pdev->vendor, pdev->device,
|
| 5196 | atomic_read(&pmcraid_adapter_count));
|
| 5197 |
|
| 5198 | rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
|
| 5199 |
|
| 5200 | if (rc < 0) {
|
| 5201 | dev_err(&pdev->dev,
|
| 5202 | "Couldn't register memory range of registers\n");
|
| 5203 | goto out_disable_device;
|
| 5204 | }
|
| 5205 |
|
| 5206 | mapped_pci_addr = pci_iomap(pdev, 0, 0);
|
| 5207 |
|
| 5208 | if (!mapped_pci_addr) {
|
| 5209 | dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
|
| 5210 | rc = -ENOMEM;
|
| 5211 | goto out_release_regions;
|
| 5212 | }
|
| 5213 |
|
| 5214 | pci_set_master(pdev);
|
| 5215 |
|
| 5216 | |
| 5217 | * 32-bit addressable range though it has 64-bit IOARRIN register.
|
| 5218 | * However, firmware supports 64-bit streaming DMA buffers, whereas
|
| 5219 | * coherent buffers are to be 32-bit. Since dma_alloc_coherent always
|
| 5220 | * returns memory within 4GB (if not, change this logic), coherent
|
| 5221 | * buffers are within firmware acceptable address ranges.
|
| 5222 |
|
| 5223 | if (sizeof(dma_addr_t) == 4 ||
|
| 5224 | dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
|
| 5225 | rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
|
| 5226 |
|
| 5227 | |
| 5228 | * bit mask for dma_alloc_coherent to return addresses within 4GB
|
| 5229 |
|
| 5230 | if (rc == 0)
|
| 5231 | rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
|
| 5232 |
|
| 5233 | if (rc != 0) {
|
| 5234 | dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
|
| 5235 | goto cleanup_nomem;
|
| 5236 | }
|
| 5237 |
|
| 5238 | host = scsi_host_alloc(&pmcraid_host_template,
|
| 5239 | sizeof(struct pmcraid_instance));
|
| 5240 |
|
| 5241 | if (!host) {
|
| 5242 | dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
|
| 5243 | rc = -ENOMEM;
|
| 5244 | goto cleanup_nomem;
|
| 5245 | }
|
| 5246 |
|
| 5247 | host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
|
| 5248 | host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
|
| 5249 | host->unique_id = host->host_no;
|
| 5250 | host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
|
| 5251 | host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
|
| 5252 |
|
| 5253 |
|
| 5254 | pinstance = (struct pmcraid_instance *)host->hostdata;
|
| 5255 | memset(pinstance, 0, sizeof(*pinstance));
|
| 5256 |
|
| 5257 | pinstance->chip_cfg =
|
| 5258 | (struct pmcraid_chip_details *)(dev_id->driver_data);
|
| 5259 |
|
| 5260 | rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
|
| 5261 |
|
| 5262 | if (rc < 0) {
|
| 5263 | dev_err(&pdev->dev, "failed to initialize adapter instance\n");
|
| 5264 | goto out_scsi_host_put;
|
| 5265 | }
|
| 5266 |
|
| 5267 | pci_set_drvdata(pdev, pinstance);
|
| 5268 |
|
| 5269 |
|
| 5270 | rc = pci_save_state(pinstance->pdev);
|
| 5271 |
|
| 5272 | if (rc != 0) {
|
| 5273 | dev_err(&pdev->dev, "Failed to save PCI config space\n");
|
| 5274 | goto out_scsi_host_put;
|
| 5275 | }
|
| 5276 |
|
| 5277 | pmcraid_disable_interrupts(pinstance, ~0);
|
| 5278 |
|
| 5279 | rc = pmcraid_register_interrupt_handler(pinstance);
|
| 5280 |
|
| 5281 | if (rc) {
|
| 5282 | dev_err(&pdev->dev, "couldn't register interrupt handler\n");
|
| 5283 | goto out_scsi_host_put;
|
| 5284 | }
|
| 5285 |
|
| 5286 | pmcraid_init_tasklets(pinstance);
|
| 5287 |
|
| 5288 |
|
| 5289 | rc = pmcraid_init_buffers(pinstance);
|
| 5290 |
|
| 5291 | if (rc) {
|
| 5292 | pmcraid_err("couldn't allocate memory blocks\n");
|
| 5293 | goto out_unregister_isr;
|
| 5294 | }
|
| 5295 |
|
| 5296 |
|
| 5297 | pmcraid_reset_type(pinstance);
|
| 5298 |
|
| 5299 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
|
| 5300 |
|
| 5301 | |
| 5302 | * state.
|
| 5303 |
|
| 5304 | pmcraid_info("starting IOA initialization sequence\n");
|
| 5305 | if (pmcraid_reset_bringup(pinstance)) {
|
| 5306 | dev_err(&pdev->dev, "couldn't initialize IOA\n");
|
| 5307 | rc = 1;
|
| 5308 | goto out_release_bufs;
|
| 5309 | }
|
| 5310 |
|
| 5311 |
|
| 5312 | rc = scsi_add_host(pinstance->host, &pdev->dev);
|
| 5313 | if (rc != 0) {
|
| 5314 | pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
|
| 5315 | goto out_release_bufs;
|
| 5316 | }
|
| 5317 |
|
| 5318 | scsi_scan_host(pinstance->host);
|
| 5319 |
|
| 5320 | rc = pmcraid_setup_chrdev(pinstance);
|
| 5321 |
|
| 5322 | if (rc != 0) {
|
| 5323 | pmcraid_err("couldn't create mgmt interface, error: %x\n",
|
| 5324 | rc);
|
| 5325 | goto out_remove_host;
|
| 5326 | }
|
| 5327 |
|
| 5328 | |
| 5329 | * removing devices to OS
|
| 5330 |
|
| 5331 | atomic_set(&pinstance->expose_resources, 1);
|
| 5332 | schedule_work(&pinstance->worker_q);
|
| 5333 | return rc;
|
| 5334 |
|
| 5335 | out_remove_host:
|
| 5336 | scsi_remove_host(host);
|
| 5337 |
|
| 5338 | out_release_bufs:
|
| 5339 | pmcraid_release_buffers(pinstance);
|
| 5340 |
|
| 5341 | out_unregister_isr:
|
| 5342 | pmcraid_kill_tasklets(pinstance);
|
| 5343 | pmcraid_unregister_interrupt_handler(pinstance);
|
| 5344 |
|
| 5345 | out_scsi_host_put:
|
| 5346 | scsi_host_put(host);
|
| 5347 |
|
| 5348 | cleanup_nomem:
|
| 5349 | iounmap(mapped_pci_addr);
|
| 5350 |
|
| 5351 | out_release_regions:
|
| 5352 | pci_release_regions(pdev);
|
| 5353 |
|
| 5354 | out_disable_device:
|
| 5355 | atomic_dec(&pmcraid_adapter_count);
|
| 5356 | pci_disable_device(pdev);
|
| 5357 | return -ENODEV;
|
| 5358 | }
|
| 5359 |
|
| 5360 | static SIMPLE_DEV_PM_OPS(pmcraid_pm_ops, pmcraid_suspend, pmcraid_resume);
|
| 5361 |
|
| 5362 | |
| 5363 | * PCI driver structure of pmcraid driver
|
| 5364 |
|
| 5365 | static struct pci_driver pmcraid_driver = {
|
| 5366 | .name = PMCRAID_DRIVER_NAME,
|
| 5367 | .id_table = pmcraid_pci_table,
|
| 5368 | .probe = pmcraid_probe,
|
| 5369 | .remove = pmcraid_remove,
|
| 5370 | .driver.pm = &pmcraid_pm_ops,
|
| 5371 | .shutdown = pmcraid_shutdown
|
| 5372 | };
|
| 5373 |
|
| 5374 | |
| 5375 | * pmcraid_init - module load entry point
|
| 5376 |
|
| 5377 | static int __init pmcraid_init(void)
|
| 5378 | {
|
| 5379 | dev_t dev;
|
| 5380 | int error;
|
| 5381 |
|
| 5382 | pmcraid_info("%s Device Driver version: %s\n",
|
| 5383 | PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
|
| 5384 |
|
| 5385 | error = alloc_chrdev_region(&dev, 0,
|
| 5386 | PMCRAID_MAX_ADAPTERS,
|
| 5387 | PMCRAID_DEVFILE);
|
| 5388 |
|
| 5389 | if (error) {
|
| 5390 | pmcraid_err("failed to get a major number for adapters\n");
|
| 5391 | goto out_init;
|
| 5392 | }
|
| 5393 |
|
| 5394 | pmcraid_major = MAJOR(dev);
|
| 5395 |
|
| 5396 | error = class_register(&pmcraid_class);
|
| 5397 |
|
| 5398 | if (error) {
|
| 5399 | pmcraid_err("failed to register with sysfs, error = %x\n",
|
| 5400 | error);
|
| 5401 | goto out_unreg_chrdev;
|
| 5402 | }
|
| 5403 |
|
| 5404 | error = pmcraid_netlink_init();
|
| 5405 |
|
| 5406 | if (error) {
|
| 5407 | class_unregister(&pmcraid_class);
|
| 5408 | goto out_unreg_chrdev;
|
| 5409 | }
|
| 5410 |
|
| 5411 | error = pci_register_driver(&pmcraid_driver);
|
| 5412 |
|
| 5413 | if (error == 0)
|
| 5414 | goto out_init;
|
| 5415 |
|
| 5416 | pmcraid_err("failed to register pmcraid driver, error = %x\n",
|
| 5417 | error);
|
| 5418 | class_unregister(&pmcraid_class);
|
| 5419 | pmcraid_netlink_release();
|
| 5420 |
|
| 5421 | out_unreg_chrdev:
|
| 5422 | unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
|
| 5423 |
|
| 5424 | out_init:
|
| 5425 | return error;
|
| 5426 | }
|
| 5427 |
|
| 5428 | |
| 5429 | * pmcraid_exit - module unload entry point
|
| 5430 |
|
| 5431 | static void __exit pmcraid_exit(void)
|
| 5432 | {
|
| 5433 | pmcraid_netlink_release();
|
| 5434 | unregister_chrdev_region(MKDEV(pmcraid_major, 0),
|
| 5435 | PMCRAID_MAX_ADAPTERS);
|
| 5436 | pci_unregister_driver(&pmcraid_driver);
|
| 5437 | class_unregister(&pmcraid_class);
|
| 5438 | }
|
| 5439 |
|
| 5440 | module_init(pmcraid_init);
|
| 5441 | module_exit(pmcraid_exit);
|