Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters |
| 3 | * |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 4 | * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com> |
| 5 | * PMC-Sierra Inc |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 6 | * |
| 7 | * Copyright (C) 2008, 2009 PMC Sierra Inc |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, |
| 22 | * USA |
| 23 | * |
| 24 | */ |
| 25 | #include <linux/fs.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/types.h> |
| 28 | #include <linux/errno.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/ioport.h> |
| 31 | #include <linux/delay.h> |
| 32 | #include <linux/pci.h> |
| 33 | #include <linux/wait.h> |
| 34 | #include <linux/spinlock.h> |
| 35 | #include <linux/sched.h> |
| 36 | #include <linux/interrupt.h> |
| 37 | #include <linux/blkdev.h> |
| 38 | #include <linux/firmware.h> |
| 39 | #include <linux/module.h> |
| 40 | #include <linux/moduleparam.h> |
| 41 | #include <linux/hdreg.h> |
| 42 | #include <linux/version.h> |
| 43 | #include <linux/io.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 44 | #include <linux/slab.h> |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 45 | #include <asm/irq.h> |
| 46 | #include <asm/processor.h> |
| 47 | #include <linux/libata.h> |
| 48 | #include <linux/mutex.h> |
| 49 | #include <scsi/scsi.h> |
| 50 | #include <scsi/scsi_host.h> |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 51 | #include <scsi/scsi_device.h> |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 52 | #include <scsi/scsi_tcq.h> |
| 53 | #include <scsi/scsi_eh.h> |
| 54 | #include <scsi/scsi_cmnd.h> |
| 55 | #include <scsi/scsicam.h> |
| 56 | |
| 57 | #include "pmcraid.h" |
| 58 | |
| 59 | /* |
| 60 | * Module configuration parameters |
| 61 | */ |
| 62 | static unsigned int pmcraid_debug_log; |
| 63 | static unsigned int pmcraid_disable_aen; |
| 64 | static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST; |
| 65 | |
| 66 | /* |
| 67 | * Data structures to support multiple adapters by the LLD. |
| 68 | * pmcraid_adapter_count - count of configured adapters |
| 69 | */ |
| 70 | static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0); |
| 71 | |
| 72 | /* |
| 73 | * Supporting user-level control interface through IOCTL commands. |
| 74 | * pmcraid_major - major number to use |
| 75 | * pmcraid_minor - minor number(s) to use |
| 76 | */ |
| 77 | static unsigned int pmcraid_major; |
| 78 | static struct class *pmcraid_class; |
| 79 | DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS); |
| 80 | |
| 81 | /* |
| 82 | * Module parameters |
| 83 | */ |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 84 | MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 85 | MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver"); |
| 86 | MODULE_LICENSE("GPL"); |
| 87 | MODULE_VERSION(PMCRAID_DRIVER_VERSION); |
| 88 | |
| 89 | module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR)); |
| 90 | MODULE_PARM_DESC(log_level, |
| 91 | "Enables firmware error code logging, default :1 high-severity" |
| 92 | " errors, 2: all errors including high-severity errors," |
| 93 | " 0: disables logging"); |
| 94 | |
| 95 | module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR)); |
| 96 | MODULE_PARM_DESC(debug, |
| 97 | "Enable driver verbose message logging. Set 1 to enable." |
| 98 | "(default: 0)"); |
| 99 | |
| 100 | module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR)); |
| 101 | MODULE_PARM_DESC(disable_aen, |
| 102 | "Disable driver aen notifications to apps. Set 1 to disable." |
| 103 | "(default: 0)"); |
| 104 | |
| 105 | /* chip specific constants for PMC MaxRAID controllers (same for |
| 106 | * 0x5220 and 0x8010 |
| 107 | */ |
| 108 | static struct pmcraid_chip_details pmcraid_chip_cfg[] = { |
| 109 | { |
| 110 | .ioastatus = 0x0, |
| 111 | .ioarrin = 0x00040, |
| 112 | .mailbox = 0x7FC30, |
| 113 | .global_intr_mask = 0x00034, |
| 114 | .ioa_host_intr = 0x0009C, |
| 115 | .ioa_host_intr_clr = 0x000A0, |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 116 | .ioa_host_msix_intr = 0x7FC40, |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 117 | .ioa_host_mask = 0x7FC28, |
| 118 | .ioa_host_mask_clr = 0x7FC28, |
| 119 | .host_ioa_intr = 0x00020, |
| 120 | .host_ioa_intr_clr = 0x00020, |
| 121 | .transop_timeout = 300 |
| 122 | } |
| 123 | }; |
| 124 | |
| 125 | /* |
| 126 | * PCI device ids supported by pmcraid driver |
| 127 | */ |
| 128 | static struct pci_device_id pmcraid_pci_table[] __devinitdata = { |
| 129 | { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID), |
| 130 | 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0] |
| 131 | }, |
| 132 | {} |
| 133 | }; |
| 134 | |
| 135 | MODULE_DEVICE_TABLE(pci, pmcraid_pci_table); |
| 136 | |
| 137 | |
| 138 | |
| 139 | /** |
| 140 | * pmcraid_slave_alloc - Prepare for commands to a device |
| 141 | * @scsi_dev: scsi device struct |
| 142 | * |
| 143 | * This function is called by mid-layer prior to sending any command to the new |
| 144 | * device. Stores resource entry details of the device in scsi_device struct. |
| 145 | * Queuecommand uses the resource handle and other details to fill up IOARCB |
| 146 | * while sending commands to the device. |
| 147 | * |
| 148 | * Return value: |
| 149 | * 0 on success / -ENXIO if device does not exist |
| 150 | */ |
| 151 | static int pmcraid_slave_alloc(struct scsi_device *scsi_dev) |
| 152 | { |
| 153 | struct pmcraid_resource_entry *temp, *res = NULL; |
| 154 | struct pmcraid_instance *pinstance; |
| 155 | u8 target, bus, lun; |
| 156 | unsigned long lock_flags; |
| 157 | int rc = -ENXIO; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 158 | u16 fw_version; |
| 159 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 160 | pinstance = shost_priv(scsi_dev->host); |
| 161 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 162 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
| 163 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 164 | /* Driver exposes VSET and GSCSI resources only; all other device types |
| 165 | * are not exposed. Resource list is synchronized using resource lock |
| 166 | * so any traversal or modifications to the list should be done inside |
| 167 | * this lock |
| 168 | */ |
| 169 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
| 170 | list_for_each_entry(temp, &pinstance->used_res_q, queue) { |
| 171 | |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 172 | /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */ |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 173 | if (RES_IS_VSET(temp->cfg_entry)) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 174 | if (fw_version <= PMCRAID_FW_VERSION_1) |
| 175 | target = temp->cfg_entry.unique_flags1; |
| 176 | else |
| 177 | target = temp->cfg_entry.array_id & 0xFF; |
| 178 | |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 179 | if (target > PMCRAID_MAX_VSET_TARGETS) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 180 | continue; |
| 181 | bus = PMCRAID_VSET_BUS_ID; |
| 182 | lun = 0; |
| 183 | } else if (RES_IS_GSCSI(temp->cfg_entry)) { |
| 184 | target = RES_TARGET(temp->cfg_entry.resource_address); |
| 185 | bus = PMCRAID_PHYS_BUS_ID; |
| 186 | lun = RES_LUN(temp->cfg_entry.resource_address); |
| 187 | } else { |
| 188 | continue; |
| 189 | } |
| 190 | |
| 191 | if (bus == scsi_dev->channel && |
| 192 | target == scsi_dev->id && |
| 193 | lun == scsi_dev->lun) { |
| 194 | res = temp; |
| 195 | break; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | if (res) { |
| 200 | res->scsi_dev = scsi_dev; |
| 201 | scsi_dev->hostdata = res; |
| 202 | res->change_detected = 0; |
| 203 | atomic_set(&res->read_failures, 0); |
| 204 | atomic_set(&res->write_failures, 0); |
| 205 | rc = 0; |
| 206 | } |
| 207 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
| 208 | return rc; |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * pmcraid_slave_configure - Configures a SCSI device |
| 213 | * @scsi_dev: scsi device struct |
| 214 | * |
| 215 | * This fucntion is executed by SCSI mid layer just after a device is first |
| 216 | * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the |
| 217 | * timeout value (default 30s) will be over-written to a higher value (60s) |
| 218 | * and max_sectors value will be over-written to 512. It also sets queue depth |
| 219 | * to host->cmd_per_lun value |
| 220 | * |
| 221 | * Return value: |
| 222 | * 0 on success |
| 223 | */ |
| 224 | static int pmcraid_slave_configure(struct scsi_device *scsi_dev) |
| 225 | { |
| 226 | struct pmcraid_resource_entry *res = scsi_dev->hostdata; |
| 227 | |
| 228 | if (!res) |
| 229 | return 0; |
| 230 | |
| 231 | /* LLD exposes VSETs and Enclosure devices only */ |
| 232 | if (RES_IS_GSCSI(res->cfg_entry) && |
| 233 | scsi_dev->type != TYPE_ENCLOSURE) |
| 234 | return -ENXIO; |
| 235 | |
| 236 | pmcraid_info("configuring %x:%x:%x:%x\n", |
| 237 | scsi_dev->host->unique_id, |
| 238 | scsi_dev->channel, |
| 239 | scsi_dev->id, |
| 240 | scsi_dev->lun); |
| 241 | |
| 242 | if (RES_IS_GSCSI(res->cfg_entry)) { |
| 243 | scsi_dev->allow_restart = 1; |
| 244 | } else if (RES_IS_VSET(res->cfg_entry)) { |
| 245 | scsi_dev->allow_restart = 1; |
| 246 | blk_queue_rq_timeout(scsi_dev->request_queue, |
| 247 | PMCRAID_VSET_IO_TIMEOUT); |
Martin K. Petersen | 086fa5f | 2010-02-26 00:20:38 -0500 | [diff] [blame] | 248 | blk_queue_max_hw_sectors(scsi_dev->request_queue, |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 249 | PMCRAID_VSET_MAX_SECTORS); |
| 250 | } |
| 251 | |
| 252 | if (scsi_dev->tagged_supported && |
| 253 | (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { |
| 254 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); |
| 255 | scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG, |
| 256 | scsi_dev->host->cmd_per_lun); |
| 257 | } else { |
| 258 | scsi_adjust_queue_depth(scsi_dev, 0, |
| 259 | scsi_dev->host->cmd_per_lun); |
| 260 | } |
| 261 | |
| 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it |
| 267 | * |
| 268 | * @scsi_dev: scsi device struct |
| 269 | * |
| 270 | * This is called by mid-layer before removing a device. Pointer assignments |
| 271 | * done in pmcraid_slave_alloc will be reset to NULL here. |
| 272 | * |
| 273 | * Return value |
| 274 | * none |
| 275 | */ |
| 276 | static void pmcraid_slave_destroy(struct scsi_device *scsi_dev) |
| 277 | { |
| 278 | struct pmcraid_resource_entry *res; |
| 279 | |
| 280 | res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; |
| 281 | |
| 282 | if (res) |
| 283 | res->scsi_dev = NULL; |
| 284 | |
| 285 | scsi_dev->hostdata = NULL; |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * pmcraid_change_queue_depth - Change the device's queue depth |
| 290 | * @scsi_dev: scsi device struct |
| 291 | * @depth: depth to set |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 292 | * @reason: calling context |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 293 | * |
| 294 | * Return value |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 295 | * actual depth set |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 296 | */ |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 297 | static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth, |
| 298 | int reason) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 299 | { |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 300 | if (reason != SCSI_QDEPTH_DEFAULT) |
| 301 | return -EOPNOTSUPP; |
| 302 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 303 | if (depth > PMCRAID_MAX_CMD_PER_LUN) |
| 304 | depth = PMCRAID_MAX_CMD_PER_LUN; |
| 305 | |
| 306 | scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth); |
| 307 | |
| 308 | return scsi_dev->queue_depth; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * pmcraid_change_queue_type - Change the device's queue type |
| 313 | * @scsi_dev: scsi device struct |
| 314 | * @tag: type of tags to use |
| 315 | * |
| 316 | * Return value: |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 317 | * actual queue type set |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 318 | */ |
| 319 | static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag) |
| 320 | { |
| 321 | struct pmcraid_resource_entry *res; |
| 322 | |
| 323 | res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; |
| 324 | |
| 325 | if ((res) && scsi_dev->tagged_supported && |
| 326 | (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { |
| 327 | scsi_set_tag_type(scsi_dev, tag); |
| 328 | |
| 329 | if (tag) |
| 330 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); |
| 331 | else |
| 332 | scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth); |
| 333 | } else |
| 334 | tag = 0; |
| 335 | |
| 336 | return tag; |
| 337 | } |
| 338 | |
| 339 | |
| 340 | /** |
| 341 | * pmcraid_init_cmdblk - initializes a command block |
| 342 | * |
| 343 | * @cmd: pointer to struct pmcraid_cmd to be initialized |
| 344 | * @index: if >=0 first time initialization; otherwise reinitialization |
| 345 | * |
| 346 | * Return Value |
| 347 | * None |
| 348 | */ |
| 349 | void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index) |
| 350 | { |
| 351 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); |
| 352 | dma_addr_t dma_addr = cmd->ioa_cb_bus_addr; |
| 353 | |
| 354 | if (index >= 0) { |
| 355 | /* first time initialization (called from probe) */ |
| 356 | u32 ioasa_offset = |
| 357 | offsetof(struct pmcraid_control_block, ioasa); |
| 358 | |
| 359 | cmd->index = index; |
| 360 | ioarcb->response_handle = cpu_to_le32(index << 2); |
| 361 | ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr); |
| 362 | ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset); |
| 363 | ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa)); |
| 364 | } else { |
| 365 | /* re-initialization of various lengths, called once command is |
| 366 | * processed by IOA |
| 367 | */ |
| 368 | memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 369 | ioarcb->hrrq_id = 0; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 370 | ioarcb->request_flags0 = 0; |
| 371 | ioarcb->request_flags1 = 0; |
| 372 | ioarcb->cmd_timeout = 0; |
| 373 | ioarcb->ioarcb_bus_addr &= (~0x1FULL); |
| 374 | ioarcb->ioadl_bus_addr = 0; |
| 375 | ioarcb->ioadl_length = 0; |
| 376 | ioarcb->data_transfer_length = 0; |
| 377 | ioarcb->add_cmd_param_length = 0; |
| 378 | ioarcb->add_cmd_param_offset = 0; |
| 379 | cmd->ioa_cb->ioasa.ioasc = 0; |
| 380 | cmd->ioa_cb->ioasa.residual_data_length = 0; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 381 | cmd->time_left = 0; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | cmd->cmd_done = NULL; |
| 385 | cmd->scsi_cmd = NULL; |
| 386 | cmd->release = 0; |
| 387 | cmd->completion_req = 0; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 388 | cmd->sense_buffer = 0; |
| 389 | cmd->sense_buffer_dma = 0; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 390 | cmd->dma_handle = 0; |
| 391 | init_timer(&cmd->timer); |
| 392 | } |
| 393 | |
| 394 | /** |
| 395 | * pmcraid_reinit_cmdblk - reinitialize a command block |
| 396 | * |
| 397 | * @cmd: pointer to struct pmcraid_cmd to be reinitialized |
| 398 | * |
| 399 | * Return Value |
| 400 | * None |
| 401 | */ |
| 402 | static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd) |
| 403 | { |
| 404 | pmcraid_init_cmdblk(cmd, -1); |
| 405 | } |
| 406 | |
| 407 | /** |
| 408 | * pmcraid_get_free_cmd - get a free cmd block from command block pool |
| 409 | * @pinstance: adapter instance structure |
| 410 | * |
| 411 | * Return Value: |
| 412 | * returns pointer to cmd block or NULL if no blocks are available |
| 413 | */ |
| 414 | static struct pmcraid_cmd *pmcraid_get_free_cmd( |
| 415 | struct pmcraid_instance *pinstance |
| 416 | ) |
| 417 | { |
| 418 | struct pmcraid_cmd *cmd = NULL; |
| 419 | unsigned long lock_flags; |
| 420 | |
| 421 | /* free cmd block list is protected by free_pool_lock */ |
| 422 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); |
| 423 | |
| 424 | if (!list_empty(&pinstance->free_cmd_pool)) { |
| 425 | cmd = list_entry(pinstance->free_cmd_pool.next, |
| 426 | struct pmcraid_cmd, free_list); |
| 427 | list_del(&cmd->free_list); |
| 428 | } |
| 429 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); |
| 430 | |
| 431 | /* Initialize the command block before giving it the caller */ |
| 432 | if (cmd != NULL) |
| 433 | pmcraid_reinit_cmdblk(cmd); |
| 434 | return cmd; |
| 435 | } |
| 436 | |
| 437 | /** |
| 438 | * pmcraid_return_cmd - return a completed command block back into free pool |
| 439 | * @cmd: pointer to the command block |
| 440 | * |
| 441 | * Return Value: |
| 442 | * nothing |
| 443 | */ |
| 444 | void pmcraid_return_cmd(struct pmcraid_cmd *cmd) |
| 445 | { |
| 446 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 447 | unsigned long lock_flags; |
| 448 | |
| 449 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); |
| 450 | list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool); |
| 451 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * pmcraid_read_interrupts - reads IOA interrupts |
| 456 | * |
| 457 | * @pinstance: pointer to adapter instance structure |
| 458 | * |
| 459 | * Return value |
| 460 | * interrupts read from IOA |
| 461 | */ |
| 462 | static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance) |
| 463 | { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 464 | return (pinstance->interrupt_mode) ? |
| 465 | ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) : |
| 466 | ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | /** |
| 470 | * pmcraid_disable_interrupts - Masks and clears all specified interrupts |
| 471 | * |
| 472 | * @pinstance: pointer to per adapter instance structure |
| 473 | * @intrs: interrupts to disable |
| 474 | * |
| 475 | * Return Value |
| 476 | * None |
| 477 | */ |
| 478 | static void pmcraid_disable_interrupts( |
| 479 | struct pmcraid_instance *pinstance, |
| 480 | u32 intrs |
| 481 | ) |
| 482 | { |
| 483 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
| 484 | u32 nmask = gmask | GLOBAL_INTERRUPT_MASK; |
| 485 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 486 | iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 487 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); |
| 488 | ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
| 489 | |
| 490 | if (!pinstance->interrupt_mode) { |
| 491 | iowrite32(intrs, |
| 492 | pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| 493 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| 494 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | /** |
| 498 | * pmcraid_enable_interrupts - Enables specified interrupts |
| 499 | * |
| 500 | * @pinstance: pointer to per adapter instance structure |
| 501 | * @intr: interrupts to enable |
| 502 | * |
| 503 | * Return Value |
| 504 | * None |
| 505 | */ |
| 506 | static void pmcraid_enable_interrupts( |
| 507 | struct pmcraid_instance *pinstance, |
| 508 | u32 intrs |
| 509 | ) |
| 510 | { |
| 511 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
| 512 | u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK); |
| 513 | |
| 514 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 515 | |
| 516 | if (!pinstance->interrupt_mode) { |
| 517 | iowrite32(~intrs, |
| 518 | pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| 519 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| 520 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 521 | |
| 522 | pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n", |
| 523 | ioread32(pinstance->int_regs.global_interrupt_mask_reg), |
| 524 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg)); |
| 525 | } |
| 526 | |
| 527 | /** |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 528 | * pmcraid_clr_trans_op - clear trans to op interrupt |
| 529 | * |
| 530 | * @pinstance: pointer to per adapter instance structure |
| 531 | * |
| 532 | * Return Value |
| 533 | * None |
| 534 | */ |
| 535 | static void pmcraid_clr_trans_op( |
| 536 | struct pmcraid_instance *pinstance |
| 537 | ) |
| 538 | { |
| 539 | unsigned long lock_flags; |
| 540 | |
| 541 | if (!pinstance->interrupt_mode) { |
| 542 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
| 543 | pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| 544 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| 545 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
| 546 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
| 547 | ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg); |
| 548 | } |
| 549 | |
| 550 | if (pinstance->reset_cmd != NULL) { |
| 551 | del_timer(&pinstance->reset_cmd->timer); |
| 552 | spin_lock_irqsave( |
| 553 | pinstance->host->host_lock, lock_flags); |
| 554 | pinstance->reset_cmd->cmd_done(pinstance->reset_cmd); |
| 555 | spin_unlock_irqrestore( |
| 556 | pinstance->host->host_lock, lock_flags); |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | /** |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 561 | * pmcraid_reset_type - Determine the required reset type |
| 562 | * @pinstance: pointer to adapter instance structure |
| 563 | * |
| 564 | * IOA requires hard reset if any of the following conditions is true. |
| 565 | * 1. If HRRQ valid interrupt is not masked |
| 566 | * 2. IOA reset alert doorbell is set |
| 567 | * 3. If there are any error interrupts |
| 568 | */ |
| 569 | static void pmcraid_reset_type(struct pmcraid_instance *pinstance) |
| 570 | { |
| 571 | u32 mask; |
| 572 | u32 intrs; |
| 573 | u32 alerts; |
| 574 | |
| 575 | mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| 576 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
| 577 | alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
| 578 | |
| 579 | if ((mask & INTRS_HRRQ_VALID) == 0 || |
| 580 | (alerts & DOORBELL_IOA_RESET_ALERT) || |
| 581 | (intrs & PMCRAID_ERROR_INTERRUPTS)) { |
| 582 | pmcraid_info("IOA requires hard reset\n"); |
| 583 | pinstance->ioa_hard_reset = 1; |
| 584 | } |
| 585 | |
| 586 | /* If unit check is active, trigger the dump */ |
| 587 | if (intrs & INTRS_IOA_UNIT_CHECK) |
| 588 | pinstance->ioa_unit_check = 1; |
| 589 | } |
| 590 | |
| 591 | /** |
| 592 | * pmcraid_bist_done - completion function for PCI BIST |
| 593 | * @cmd: pointer to reset command |
| 594 | * Return Value |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 595 | * none |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 596 | */ |
| 597 | |
| 598 | static void pmcraid_ioa_reset(struct pmcraid_cmd *); |
| 599 | |
| 600 | static void pmcraid_bist_done(struct pmcraid_cmd *cmd) |
| 601 | { |
| 602 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 603 | unsigned long lock_flags; |
| 604 | int rc; |
| 605 | u16 pci_reg; |
| 606 | |
| 607 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); |
| 608 | |
| 609 | /* If PCI config space can't be accessed wait for another two secs */ |
| 610 | if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) && |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 611 | cmd->time_left > 0) { |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 612 | pmcraid_info("BIST not complete, waiting another 2 secs\n"); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 613 | cmd->timer.expires = jiffies + cmd->time_left; |
| 614 | cmd->time_left = 0; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 615 | cmd->timer.data = (unsigned long)cmd; |
| 616 | cmd->timer.function = |
| 617 | (void (*)(unsigned long))pmcraid_bist_done; |
| 618 | add_timer(&cmd->timer); |
| 619 | } else { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 620 | cmd->time_left = 0; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 621 | pmcraid_info("BIST is complete, proceeding with reset\n"); |
| 622 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 623 | pmcraid_ioa_reset(cmd); |
| 624 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | /** |
| 629 | * pmcraid_start_bist - starts BIST |
| 630 | * @cmd: pointer to reset cmd |
| 631 | * Return Value |
| 632 | * none |
| 633 | */ |
| 634 | static void pmcraid_start_bist(struct pmcraid_cmd *cmd) |
| 635 | { |
| 636 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 637 | u32 doorbells, intrs; |
| 638 | |
| 639 | /* proceed with bist and wait for 2 seconds */ |
| 640 | iowrite32(DOORBELL_IOA_START_BIST, |
| 641 | pinstance->int_regs.host_ioa_interrupt_reg); |
| 642 | doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
| 643 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 644 | pmcraid_info("doorbells after start bist: %x intrs: %x\n", |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 645 | doorbells, intrs); |
| 646 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 647 | cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 648 | cmd->timer.data = (unsigned long)cmd; |
| 649 | cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); |
| 650 | cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done; |
| 651 | add_timer(&cmd->timer); |
| 652 | } |
| 653 | |
| 654 | /** |
| 655 | * pmcraid_reset_alert_done - completion routine for reset_alert |
| 656 | * @cmd: pointer to command block used in reset sequence |
| 657 | * Return value |
| 658 | * None |
| 659 | */ |
| 660 | static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd) |
| 661 | { |
| 662 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 663 | u32 status = ioread32(pinstance->ioa_status); |
| 664 | unsigned long lock_flags; |
| 665 | |
| 666 | /* if the critical operation in progress bit is set or the wait times |
| 667 | * out, invoke reset engine to proceed with hard reset. If there is |
| 668 | * some more time to wait, restart the timer |
| 669 | */ |
| 670 | if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) || |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 671 | cmd->time_left <= 0) { |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 672 | pmcraid_info("critical op is reset proceeding with reset\n"); |
| 673 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 674 | pmcraid_ioa_reset(cmd); |
| 675 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 676 | } else { |
| 677 | pmcraid_info("critical op is not yet reset waiting again\n"); |
| 678 | /* restart timer if some more time is available to wait */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 679 | cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 680 | cmd->timer.data = (unsigned long)cmd; |
| 681 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
| 682 | cmd->timer.function = |
| 683 | (void (*)(unsigned long))pmcraid_reset_alert_done; |
| 684 | add_timer(&cmd->timer); |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | /** |
| 689 | * pmcraid_reset_alert - alerts IOA for a possible reset |
| 690 | * @cmd : command block to be used for reset sequence. |
| 691 | * |
| 692 | * Return Value |
| 693 | * returns 0 if pci config-space is accessible and RESET_DOORBELL is |
| 694 | * successfully written to IOA. Returns non-zero in case pci_config_space |
| 695 | * is not accessible |
| 696 | */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 697 | static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 698 | static void pmcraid_reset_alert(struct pmcraid_cmd *cmd) |
| 699 | { |
| 700 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 701 | u32 doorbells; |
| 702 | int rc; |
| 703 | u16 pci_reg; |
| 704 | |
| 705 | /* If we are able to access IOA PCI config space, alert IOA that we are |
| 706 | * going to reset it soon. This enables IOA to preserv persistent error |
| 707 | * data if any. In case memory space is not accessible, proceed with |
| 708 | * BIST or slot_reset |
| 709 | */ |
| 710 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); |
| 711 | if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) { |
| 712 | |
| 713 | /* wait for IOA permission i.e until CRITICAL_OPERATION bit is |
| 714 | * reset IOA doesn't generate any interrupts when CRITICAL |
| 715 | * OPERATION bit is reset. A timer is started to wait for this |
| 716 | * bit to be reset. |
| 717 | */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 718 | cmd->time_left = PMCRAID_RESET_TIMEOUT; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 719 | cmd->timer.data = (unsigned long)cmd; |
| 720 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
| 721 | cmd->timer.function = |
| 722 | (void (*)(unsigned long))pmcraid_reset_alert_done; |
| 723 | add_timer(&cmd->timer); |
| 724 | |
| 725 | iowrite32(DOORBELL_IOA_RESET_ALERT, |
| 726 | pinstance->int_regs.host_ioa_interrupt_reg); |
| 727 | doorbells = |
| 728 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
| 729 | pmcraid_info("doorbells after reset alert: %x\n", doorbells); |
| 730 | } else { |
| 731 | pmcraid_info("PCI config is not accessible starting BIST\n"); |
| 732 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; |
| 733 | pmcraid_start_bist(cmd); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | /** |
| 738 | * pmcraid_timeout_handler - Timeout handler for internally generated ops |
| 739 | * |
| 740 | * @cmd : pointer to command structure, that got timedout |
| 741 | * |
| 742 | * This function blocks host requests and initiates an adapter reset. |
| 743 | * |
| 744 | * Return value: |
| 745 | * None |
| 746 | */ |
| 747 | static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd) |
| 748 | { |
| 749 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 750 | unsigned long lock_flags; |
| 751 | |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 752 | dev_info(&pinstance->pdev->dev, |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 753 | "Adapter being reset due to cmd(CDB[0] = %x) timeout\n", |
| 754 | cmd->ioa_cb->ioarcb.cdb[0]); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 755 | |
| 756 | /* Command timeouts result in hard reset sequence. The command that got |
| 757 | * timed out may be the one used as part of reset sequence. In this |
| 758 | * case restart reset sequence using the same command block even if |
| 759 | * reset is in progress. Otherwise fail this command and get a free |
| 760 | * command block to restart the reset sequence. |
| 761 | */ |
| 762 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 763 | if (!pinstance->ioa_reset_in_progress) { |
| 764 | pinstance->ioa_reset_attempts = 0; |
| 765 | cmd = pmcraid_get_free_cmd(pinstance); |
| 766 | |
| 767 | /* If we are out of command blocks, just return here itself. |
| 768 | * Some other command's timeout handler can do the reset job |
| 769 | */ |
| 770 | if (cmd == NULL) { |
| 771 | spin_unlock_irqrestore(pinstance->host->host_lock, |
| 772 | lock_flags); |
| 773 | pmcraid_err("no free cmnd block for timeout handler\n"); |
| 774 | return; |
| 775 | } |
| 776 | |
| 777 | pinstance->reset_cmd = cmd; |
| 778 | pinstance->ioa_reset_in_progress = 1; |
| 779 | } else { |
| 780 | pmcraid_info("reset is already in progress\n"); |
| 781 | |
| 782 | if (pinstance->reset_cmd != cmd) { |
| 783 | /* This command should have been given to IOA, this |
| 784 | * command will be completed by fail_outstanding_cmds |
| 785 | * anyway |
| 786 | */ |
| 787 | pmcraid_err("cmd is pending but reset in progress\n"); |
| 788 | } |
| 789 | |
| 790 | /* If this command was being used as part of the reset |
| 791 | * sequence, set cmd_done pointer to pmcraid_ioa_reset. This |
| 792 | * causes fail_outstanding_commands not to return the command |
| 793 | * block back to free pool |
| 794 | */ |
| 795 | if (cmd == pinstance->reset_cmd) |
| 796 | cmd->cmd_done = pmcraid_ioa_reset; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 797 | } |
| 798 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 799 | /* Notify apps of important IOA bringup/bringdown sequences */ |
| 800 | if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START && |
| 801 | pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START) |
| 802 | pmcraid_notify_ioastate(pinstance, |
| 803 | PMC_DEVICE_EVENT_RESET_START); |
| 804 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 805 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| 806 | scsi_block_requests(pinstance->host); |
| 807 | pmcraid_reset_alert(cmd); |
| 808 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 809 | } |
| 810 | |
| 811 | /** |
| 812 | * pmcraid_internal_done - completion routine for internally generated cmds |
| 813 | * |
| 814 | * @cmd: command that got response from IOA |
| 815 | * |
| 816 | * Return Value: |
| 817 | * none |
| 818 | */ |
| 819 | static void pmcraid_internal_done(struct pmcraid_cmd *cmd) |
| 820 | { |
| 821 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", |
| 822 | cmd->ioa_cb->ioarcb.cdb[0], |
| 823 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
| 824 | |
| 825 | /* Some of the internal commands are sent with callers blocking for the |
| 826 | * response. Same will be indicated as part of cmd->completion_req |
| 827 | * field. Response path needs to wake up any waiters waiting for cmd |
| 828 | * completion if this flag is set. |
| 829 | */ |
| 830 | if (cmd->completion_req) { |
| 831 | cmd->completion_req = 0; |
| 832 | complete(&cmd->wait_for_completion); |
| 833 | } |
| 834 | |
| 835 | /* most of the internal commands are completed by caller itself, so |
| 836 | * no need to return the command block back to free pool until we are |
| 837 | * required to do so (e.g once done with initialization). |
| 838 | */ |
| 839 | if (cmd->release) { |
| 840 | cmd->release = 0; |
| 841 | pmcraid_return_cmd(cmd); |
| 842 | } |
| 843 | } |
| 844 | |
| 845 | /** |
| 846 | * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization |
| 847 | * |
| 848 | * @cmd: command that got response from IOA |
| 849 | * |
| 850 | * This routine is called after driver re-reads configuration table due to a |
| 851 | * lost CCN. It returns the command block back to free pool and schedules |
| 852 | * worker thread to add/delete devices into the system. |
| 853 | * |
| 854 | * Return Value: |
| 855 | * none |
| 856 | */ |
| 857 | static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd) |
| 858 | { |
| 859 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", |
| 860 | cmd->ioa_cb->ioarcb.cdb[0], |
| 861 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
| 862 | |
| 863 | if (cmd->release) { |
| 864 | cmd->release = 0; |
| 865 | pmcraid_return_cmd(cmd); |
| 866 | } |
| 867 | pmcraid_info("scheduling worker for config table reinitialization\n"); |
| 868 | schedule_work(&cmd->drv_inst->worker_q); |
| 869 | } |
| 870 | |
| 871 | /** |
| 872 | * pmcraid_erp_done - Process completion of SCSI error response from device |
| 873 | * @cmd: pmcraid_command |
| 874 | * |
| 875 | * This function copies the sense buffer into the scsi_cmd struct and completes |
| 876 | * scsi_cmd by calling scsi_done function. |
| 877 | * |
| 878 | * Return value: |
| 879 | * none |
| 880 | */ |
| 881 | static void pmcraid_erp_done(struct pmcraid_cmd *cmd) |
| 882 | { |
| 883 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| 884 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 885 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| 886 | |
| 887 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) { |
| 888 | scsi_cmd->result |= (DID_ERROR << 16); |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 889 | scmd_printk(KERN_INFO, scsi_cmd, |
| 890 | "command CDB[0] = %x failed with IOASC: 0x%08X\n", |
| 891 | cmd->ioa_cb->ioarcb.cdb[0], ioasc); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 892 | } |
| 893 | |
| 894 | /* if we had allocated sense buffers for request sense, copy the sense |
| 895 | * release the buffers |
| 896 | */ |
| 897 | if (cmd->sense_buffer != NULL) { |
| 898 | memcpy(scsi_cmd->sense_buffer, |
| 899 | cmd->sense_buffer, |
| 900 | SCSI_SENSE_BUFFERSIZE); |
| 901 | pci_free_consistent(pinstance->pdev, |
| 902 | SCSI_SENSE_BUFFERSIZE, |
| 903 | cmd->sense_buffer, cmd->sense_buffer_dma); |
| 904 | cmd->sense_buffer = NULL; |
| 905 | cmd->sense_buffer_dma = 0; |
| 906 | } |
| 907 | |
| 908 | scsi_dma_unmap(scsi_cmd); |
| 909 | pmcraid_return_cmd(cmd); |
| 910 | scsi_cmd->scsi_done(scsi_cmd); |
| 911 | } |
| 912 | |
| 913 | /** |
| 914 | * pmcraid_fire_command - sends an IOA command to adapter |
| 915 | * |
| 916 | * This function adds the given block into pending command list |
| 917 | * and returns without waiting |
| 918 | * |
| 919 | * @cmd : command to be sent to the device |
| 920 | * |
| 921 | * Return Value |
| 922 | * None |
| 923 | */ |
| 924 | static void _pmcraid_fire_command(struct pmcraid_cmd *cmd) |
| 925 | { |
| 926 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 927 | unsigned long lock_flags; |
| 928 | |
| 929 | /* Add this command block to pending cmd pool. We do this prior to |
| 930 | * writting IOARCB to ioarrin because IOA might complete the command |
| 931 | * by the time we are about to add it to the list. Response handler |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 932 | * (isr/tasklet) looks for cmd block in the pending pending list. |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 933 | */ |
| 934 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
| 935 | list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool); |
| 936 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); |
| 937 | atomic_inc(&pinstance->outstanding_cmds); |
| 938 | |
| 939 | /* driver writes lower 32-bit value of IOARCB address only */ |
| 940 | mb(); |
| 941 | iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr), |
| 942 | pinstance->ioarrin); |
| 943 | } |
| 944 | |
| 945 | /** |
| 946 | * pmcraid_send_cmd - fires a command to IOA |
| 947 | * |
| 948 | * This function also sets up timeout function, and command completion |
| 949 | * function |
| 950 | * |
| 951 | * @cmd: pointer to the command block to be fired to IOA |
| 952 | * @cmd_done: command completion function, called once IOA responds |
| 953 | * @timeout: timeout to wait for this command completion |
| 954 | * @timeout_func: timeout handler |
| 955 | * |
| 956 | * Return value |
| 957 | * none |
| 958 | */ |
| 959 | static void pmcraid_send_cmd( |
| 960 | struct pmcraid_cmd *cmd, |
| 961 | void (*cmd_done) (struct pmcraid_cmd *), |
| 962 | unsigned long timeout, |
| 963 | void (*timeout_func) (struct pmcraid_cmd *) |
| 964 | ) |
| 965 | { |
| 966 | /* initialize done function */ |
| 967 | cmd->cmd_done = cmd_done; |
| 968 | |
| 969 | if (timeout_func) { |
| 970 | /* setup timeout handler */ |
| 971 | cmd->timer.data = (unsigned long)cmd; |
| 972 | cmd->timer.expires = jiffies + timeout; |
| 973 | cmd->timer.function = (void (*)(unsigned long))timeout_func; |
| 974 | add_timer(&cmd->timer); |
| 975 | } |
| 976 | |
| 977 | /* fire the command to IOA */ |
| 978 | _pmcraid_fire_command(cmd); |
| 979 | } |
| 980 | |
| 981 | /** |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 982 | * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command |
| 983 | * @cmd: pointer to the command block used for sending IOA shutdown command |
| 984 | * |
| 985 | * Return value |
| 986 | * None |
| 987 | */ |
| 988 | static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd) |
| 989 | { |
| 990 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 991 | unsigned long lock_flags; |
| 992 | |
| 993 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 994 | pmcraid_ioa_reset(cmd); |
| 995 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 996 | } |
| 997 | |
| 998 | /** |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 999 | * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa |
| 1000 | * |
| 1001 | * @cmd: pointer to the command block used as part of reset sequence |
| 1002 | * |
| 1003 | * Return Value |
| 1004 | * None |
| 1005 | */ |
| 1006 | static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd) |
| 1007 | { |
| 1008 | pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n", |
| 1009 | cmd->ioa_cb->ioarcb.cdb[0], |
| 1010 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
| 1011 | |
| 1012 | /* Note that commands sent during reset require next command to be sent |
| 1013 | * to IOA. Hence reinit the done function as well as timeout function |
| 1014 | */ |
| 1015 | pmcraid_reinit_cmdblk(cmd); |
| 1016 | cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD; |
| 1017 | cmd->ioa_cb->ioarcb.resource_handle = |
| 1018 | cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
| 1019 | cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN; |
| 1020 | cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL; |
| 1021 | |
| 1022 | /* fire shutdown command to hardware. */ |
| 1023 | pmcraid_info("firing normal shutdown command (%d) to IOA\n", |
| 1024 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle)); |
| 1025 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1026 | pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START); |
| 1027 | |
| 1028 | pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done, |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1029 | PMCRAID_SHUTDOWN_TIMEOUT, |
| 1030 | pmcraid_timeout_handler); |
| 1031 | } |
| 1032 | |
| 1033 | /** |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1034 | * pmcraid_get_fwversion_done - completion function for get_fwversion |
| 1035 | * |
| 1036 | * @cmd: pointer to command block used to send INQUIRY command |
| 1037 | * |
| 1038 | * Return Value |
| 1039 | * none |
| 1040 | */ |
| 1041 | static void pmcraid_querycfg(struct pmcraid_cmd *); |
| 1042 | |
| 1043 | static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd) |
| 1044 | { |
| 1045 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 1046 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| 1047 | unsigned long lock_flags; |
| 1048 | |
| 1049 | /* configuration table entry size depends on firmware version. If fw |
| 1050 | * version is not known, it is not possible to interpret IOA config |
| 1051 | * table |
| 1052 | */ |
| 1053 | if (ioasc) { |
| 1054 | pmcraid_err("IOA Inquiry failed with %x\n", ioasc); |
| 1055 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 1056 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| 1057 | pmcraid_reset_alert(cmd); |
| 1058 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 1059 | } else { |
| 1060 | pmcraid_querycfg(cmd); |
| 1061 | } |
| 1062 | } |
| 1063 | |
| 1064 | /** |
| 1065 | * pmcraid_get_fwversion - reads firmware version information |
| 1066 | * |
| 1067 | * @cmd: pointer to command block used to send INQUIRY command |
| 1068 | * |
| 1069 | * Return Value |
| 1070 | * none |
| 1071 | */ |
| 1072 | static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd) |
| 1073 | { |
| 1074 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| 1075 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
| 1076 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 1077 | u16 data_size = sizeof(struct pmcraid_inquiry_data); |
| 1078 | |
| 1079 | pmcraid_reinit_cmdblk(cmd); |
| 1080 | ioarcb->request_type = REQ_TYPE_SCSI; |
| 1081 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
| 1082 | ioarcb->cdb[0] = INQUIRY; |
| 1083 | ioarcb->cdb[1] = 1; |
| 1084 | ioarcb->cdb[2] = 0xD0; |
| 1085 | ioarcb->cdb[3] = (data_size >> 8) & 0xFF; |
| 1086 | ioarcb->cdb[4] = data_size & 0xFF; |
| 1087 | |
| 1088 | /* Since entire inquiry data it can be part of IOARCB itself |
| 1089 | */ |
| 1090 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| 1091 | offsetof(struct pmcraid_ioarcb, |
| 1092 | add_data.u.ioadl[0])); |
| 1093 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
| 1094 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
| 1095 | |
| 1096 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
| 1097 | ioarcb->data_transfer_length = cpu_to_le32(data_size); |
| 1098 | ioadl = &(ioarcb->add_data.u.ioadl[0]); |
| 1099 | ioadl->flags = IOADL_FLAGS_LAST_DESC; |
| 1100 | ioadl->address = cpu_to_le64(pinstance->inq_data_baddr); |
| 1101 | ioadl->data_len = cpu_to_le32(data_size); |
| 1102 | |
| 1103 | pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done, |
| 1104 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler); |
| 1105 | } |
| 1106 | |
| 1107 | /** |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1108 | * pmcraid_identify_hrrq - registers host rrq buffers with IOA |
| 1109 | * @cmd: pointer to command block to be used for identify hrrq |
| 1110 | * |
| 1111 | * Return Value |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1112 | * none |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1113 | */ |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1114 | static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd) |
| 1115 | { |
| 1116 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 1117 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1118 | int index = cmd->hrrq_index; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1119 | __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]); |
| 1120 | u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1121 | void (*done_function)(struct pmcraid_cmd *); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1122 | |
| 1123 | pmcraid_reinit_cmdblk(cmd); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1124 | cmd->hrrq_index = index + 1; |
| 1125 | |
| 1126 | if (cmd->hrrq_index < pinstance->num_hrrq) { |
| 1127 | done_function = pmcraid_identify_hrrq; |
| 1128 | } else { |
| 1129 | cmd->hrrq_index = 0; |
| 1130 | done_function = pmcraid_get_fwversion; |
| 1131 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1132 | |
| 1133 | /* Initialize ioarcb */ |
| 1134 | ioarcb->request_type = REQ_TYPE_IOACMD; |
| 1135 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
| 1136 | |
| 1137 | /* initialize the hrrq number where IOA will respond to this command */ |
| 1138 | ioarcb->hrrq_id = index; |
| 1139 | ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ; |
| 1140 | ioarcb->cdb[1] = index; |
| 1141 | |
| 1142 | /* IOA expects 64-bit pci address to be written in B.E format |
| 1143 | * (i.e cdb[2]=MSByte..cdb[9]=LSB. |
| 1144 | */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1145 | pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n", |
| 1146 | hrrq_addr, ioarcb->ioarcb_bus_addr, index); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1147 | |
| 1148 | memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr)); |
| 1149 | memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size)); |
| 1150 | |
| 1151 | /* Subsequent commands require HRRQ identification to be successful. |
| 1152 | * Note that this gets called even during reset from SCSI mid-layer |
| 1153 | * or tasklet |
| 1154 | */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1155 | pmcraid_send_cmd(cmd, done_function, |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1156 | PMCRAID_INTERNAL_TIMEOUT, |
| 1157 | pmcraid_timeout_handler); |
| 1158 | } |
| 1159 | |
| 1160 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd); |
| 1161 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd); |
| 1162 | |
| 1163 | /** |
| 1164 | * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA |
| 1165 | * |
| 1166 | * @cmd: initialized command block pointer |
| 1167 | * |
| 1168 | * Return Value |
| 1169 | * none |
| 1170 | */ |
| 1171 | static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd) |
| 1172 | { |
| 1173 | if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE) |
| 1174 | atomic_set(&(cmd->drv_inst->ccn.ignore), 0); |
| 1175 | else |
| 1176 | atomic_set(&(cmd->drv_inst->ldn.ignore), 0); |
| 1177 | |
| 1178 | pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL); |
| 1179 | } |
| 1180 | |
| 1181 | /** |
| 1182 | * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA |
| 1183 | * |
| 1184 | * @pinstance: pointer to adapter instance structure |
| 1185 | * @type: HCAM type |
| 1186 | * |
| 1187 | * Return Value |
| 1188 | * pointer to initialized pmcraid_cmd structure or NULL |
| 1189 | */ |
| 1190 | static struct pmcraid_cmd *pmcraid_init_hcam |
| 1191 | ( |
| 1192 | struct pmcraid_instance *pinstance, |
| 1193 | u8 type |
| 1194 | ) |
| 1195 | { |
| 1196 | struct pmcraid_cmd *cmd; |
| 1197 | struct pmcraid_ioarcb *ioarcb; |
| 1198 | struct pmcraid_ioadl_desc *ioadl; |
| 1199 | struct pmcraid_hostrcb *hcam; |
| 1200 | void (*cmd_done) (struct pmcraid_cmd *); |
| 1201 | dma_addr_t dma; |
| 1202 | int rcb_size; |
| 1203 | |
| 1204 | cmd = pmcraid_get_free_cmd(pinstance); |
| 1205 | |
| 1206 | if (!cmd) { |
| 1207 | pmcraid_err("no free command blocks for hcam\n"); |
| 1208 | return cmd; |
| 1209 | } |
| 1210 | |
| 1211 | if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1212 | rcb_size = sizeof(struct pmcraid_hcam_ccn_ext); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1213 | cmd_done = pmcraid_process_ccn; |
| 1214 | dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE; |
| 1215 | hcam = &pinstance->ccn; |
| 1216 | } else { |
| 1217 | rcb_size = sizeof(struct pmcraid_hcam_ldn); |
| 1218 | cmd_done = pmcraid_process_ldn; |
| 1219 | dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE; |
| 1220 | hcam = &pinstance->ldn; |
| 1221 | } |
| 1222 | |
| 1223 | /* initialize command pointer used for HCAM registration */ |
| 1224 | hcam->cmd = cmd; |
| 1225 | |
| 1226 | ioarcb = &cmd->ioa_cb->ioarcb; |
| 1227 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| 1228 | offsetof(struct pmcraid_ioarcb, |
| 1229 | add_data.u.ioadl[0])); |
| 1230 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
| 1231 | ioadl = ioarcb->add_data.u.ioadl; |
| 1232 | |
| 1233 | /* Initialize ioarcb */ |
| 1234 | ioarcb->request_type = REQ_TYPE_HCAM; |
| 1235 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
| 1236 | ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC; |
| 1237 | ioarcb->cdb[1] = type; |
| 1238 | ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF; |
| 1239 | ioarcb->cdb[8] = (rcb_size) & 0xFF; |
| 1240 | |
| 1241 | ioarcb->data_transfer_length = cpu_to_le32(rcb_size); |
| 1242 | |
Anil Ravindranath | 8819796 | 2009-09-24 16:27:42 -0700 | [diff] [blame] | 1243 | ioadl[0].flags |= IOADL_FLAGS_READ_LAST; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1244 | ioadl[0].data_len = cpu_to_le32(rcb_size); |
| 1245 | ioadl[0].address = cpu_to_le32(dma); |
| 1246 | |
| 1247 | cmd->cmd_done = cmd_done; |
| 1248 | return cmd; |
| 1249 | } |
| 1250 | |
| 1251 | /** |
| 1252 | * pmcraid_send_hcam - Send an HCAM to IOA |
| 1253 | * @pinstance: ioa config struct |
| 1254 | * @type: HCAM type |
| 1255 | * |
| 1256 | * This function will send a Host Controlled Async command to IOA. |
| 1257 | * |
| 1258 | * Return value: |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1259 | * none |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1260 | */ |
| 1261 | static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type) |
| 1262 | { |
| 1263 | struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type); |
| 1264 | pmcraid_send_hcam_cmd(cmd); |
| 1265 | } |
| 1266 | |
| 1267 | |
| 1268 | /** |
| 1269 | * pmcraid_prepare_cancel_cmd - prepares a command block to abort another |
| 1270 | * |
| 1271 | * @cmd: pointer to cmd that is used as cancelling command |
| 1272 | * @cmd_to_cancel: pointer to the command that needs to be cancelled |
| 1273 | */ |
| 1274 | static void pmcraid_prepare_cancel_cmd( |
| 1275 | struct pmcraid_cmd *cmd, |
| 1276 | struct pmcraid_cmd *cmd_to_cancel |
| 1277 | ) |
| 1278 | { |
| 1279 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| 1280 | __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr; |
| 1281 | |
| 1282 | /* Get the resource handle to where the command to be aborted has been |
| 1283 | * sent. |
| 1284 | */ |
| 1285 | ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle; |
| 1286 | ioarcb->request_type = REQ_TYPE_IOACMD; |
| 1287 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
| 1288 | ioarcb->cdb[0] = PMCRAID_ABORT_CMD; |
| 1289 | |
| 1290 | /* IOARCB address of the command to be cancelled is given in |
| 1291 | * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in |
| 1292 | * IOARCB address are not masked. |
| 1293 | */ |
| 1294 | ioarcb_addr = cpu_to_be64(ioarcb_addr); |
| 1295 | memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr)); |
| 1296 | } |
| 1297 | |
| 1298 | /** |
| 1299 | * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM |
| 1300 | * |
| 1301 | * @cmd: command to be used as cancelling command |
| 1302 | * @type: HCAM type |
| 1303 | * @cmd_done: op done function for the cancelling command |
| 1304 | */ |
| 1305 | static void pmcraid_cancel_hcam( |
| 1306 | struct pmcraid_cmd *cmd, |
| 1307 | u8 type, |
| 1308 | void (*cmd_done) (struct pmcraid_cmd *) |
| 1309 | ) |
| 1310 | { |
| 1311 | struct pmcraid_instance *pinstance; |
| 1312 | struct pmcraid_hostrcb *hcam; |
| 1313 | |
| 1314 | pinstance = cmd->drv_inst; |
| 1315 | hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ? |
| 1316 | &pinstance->ldn : &pinstance->ccn; |
| 1317 | |
| 1318 | /* prepare for cancelling previous hcam command. If the HCAM is |
| 1319 | * currently not pending with IOA, we would have hcam->cmd as non-null |
| 1320 | */ |
| 1321 | if (hcam->cmd == NULL) |
| 1322 | return; |
| 1323 | |
| 1324 | pmcraid_prepare_cancel_cmd(cmd, hcam->cmd); |
| 1325 | |
| 1326 | /* writing to IOARRIN must be protected by host_lock, as mid-layer |
| 1327 | * schedule queuecommand while we are doing this |
| 1328 | */ |
| 1329 | pmcraid_send_cmd(cmd, cmd_done, |
| 1330 | PMCRAID_INTERNAL_TIMEOUT, |
| 1331 | pmcraid_timeout_handler); |
| 1332 | } |
| 1333 | |
| 1334 | /** |
| 1335 | * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA |
| 1336 | * |
| 1337 | * @cmd: command block to be used for cancelling the HCAM |
| 1338 | */ |
| 1339 | static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd) |
| 1340 | { |
| 1341 | pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n", |
| 1342 | cmd->ioa_cb->ioarcb.cdb[0], |
| 1343 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
| 1344 | |
| 1345 | pmcraid_reinit_cmdblk(cmd); |
| 1346 | |
| 1347 | pmcraid_cancel_hcam(cmd, |
| 1348 | PMCRAID_HCAM_CODE_CONFIG_CHANGE, |
| 1349 | pmcraid_ioa_shutdown); |
| 1350 | } |
| 1351 | |
| 1352 | /** |
| 1353 | * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA |
| 1354 | * |
| 1355 | * @cmd: command block to be used for cancelling the HCAM |
| 1356 | */ |
| 1357 | static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd) |
| 1358 | { |
| 1359 | pmcraid_cancel_hcam(cmd, |
| 1360 | PMCRAID_HCAM_CODE_LOG_DATA, |
| 1361 | pmcraid_cancel_ccn); |
| 1362 | } |
| 1363 | |
| 1364 | /** |
| 1365 | * pmcraid_expose_resource - check if the resource can be exposed to OS |
| 1366 | * |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1367 | * @fw_version: firmware version code |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1368 | * @cfgte: pointer to configuration table entry of the resource |
| 1369 | * |
| 1370 | * Return value: |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1371 | * true if resource can be added to midlayer, false(0) otherwise |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1372 | */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1373 | static int pmcraid_expose_resource(u16 fw_version, |
| 1374 | struct pmcraid_config_table_entry *cfgte) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1375 | { |
| 1376 | int retval = 0; |
| 1377 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1378 | if (cfgte->resource_type == RES_TYPE_VSET) { |
| 1379 | if (fw_version <= PMCRAID_FW_VERSION_1) |
| 1380 | retval = ((cfgte->unique_flags1 & 0x80) == 0); |
| 1381 | else |
| 1382 | retval = ((cfgte->unique_flags0 & 0x80) == 0 && |
| 1383 | (cfgte->unique_flags1 & 0x80) == 0); |
| 1384 | |
| 1385 | } else if (cfgte->resource_type == RES_TYPE_GSCSI) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1386 | retval = (RES_BUS(cfgte->resource_address) != |
| 1387 | PMCRAID_VIRTUAL_ENCL_BUS_ID); |
| 1388 | return retval; |
| 1389 | } |
| 1390 | |
| 1391 | /* attributes supported by pmcraid_event_family */ |
| 1392 | enum { |
| 1393 | PMCRAID_AEN_ATTR_UNSPEC, |
| 1394 | PMCRAID_AEN_ATTR_EVENT, |
| 1395 | __PMCRAID_AEN_ATTR_MAX, |
| 1396 | }; |
| 1397 | #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1) |
| 1398 | |
| 1399 | /* commands supported by pmcraid_event_family */ |
| 1400 | enum { |
| 1401 | PMCRAID_AEN_CMD_UNSPEC, |
| 1402 | PMCRAID_AEN_CMD_EVENT, |
| 1403 | __PMCRAID_AEN_CMD_MAX, |
| 1404 | }; |
| 1405 | #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1) |
| 1406 | |
| 1407 | static struct genl_family pmcraid_event_family = { |
| 1408 | .id = GENL_ID_GENERATE, |
| 1409 | .name = "pmcraid", |
| 1410 | .version = 1, |
| 1411 | .maxattr = PMCRAID_AEN_ATTR_MAX |
| 1412 | }; |
| 1413 | |
| 1414 | /** |
| 1415 | * pmcraid_netlink_init - registers pmcraid_event_family |
| 1416 | * |
| 1417 | * Return value: |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1418 | * 0 if the pmcraid_event_family is successfully registered |
| 1419 | * with netlink generic, non-zero otherwise |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1420 | */ |
| 1421 | static int pmcraid_netlink_init(void) |
| 1422 | { |
| 1423 | int result; |
| 1424 | |
| 1425 | result = genl_register_family(&pmcraid_event_family); |
| 1426 | |
| 1427 | if (result) |
| 1428 | return result; |
| 1429 | |
| 1430 | pmcraid_info("registered NETLINK GENERIC group: %d\n", |
| 1431 | pmcraid_event_family.id); |
| 1432 | |
| 1433 | return result; |
| 1434 | } |
| 1435 | |
| 1436 | /** |
| 1437 | * pmcraid_netlink_release - unregisters pmcraid_event_family |
| 1438 | * |
| 1439 | * Return value: |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1440 | * none |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1441 | */ |
| 1442 | static void pmcraid_netlink_release(void) |
| 1443 | { |
| 1444 | genl_unregister_family(&pmcraid_event_family); |
| 1445 | } |
| 1446 | |
| 1447 | /** |
| 1448 | * pmcraid_notify_aen - sends event msg to user space application |
| 1449 | * @pinstance: pointer to adapter instance structure |
| 1450 | * @type: HCAM type |
| 1451 | * |
| 1452 | * Return value: |
| 1453 | * 0 if success, error value in case of any failure. |
| 1454 | */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1455 | static int pmcraid_notify_aen( |
| 1456 | struct pmcraid_instance *pinstance, |
| 1457 | struct pmcraid_aen_msg *aen_msg, |
| 1458 | u32 data_size |
| 1459 | ) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1460 | { |
| 1461 | struct sk_buff *skb; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1462 | void *msg_header; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1463 | u32 total_size, nla_genl_hdr_total_size; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1464 | int result; |
| 1465 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1466 | aen_msg->hostno = (pinstance->host->unique_id << 16 | |
| 1467 | MINOR(pinstance->cdev.dev)); |
| 1468 | aen_msg->length = data_size; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1469 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1470 | data_size += sizeof(*aen_msg); |
| 1471 | |
| 1472 | total_size = nla_total_size(data_size); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1473 | /* Add GENL_HDR to total_size */ |
| 1474 | nla_genl_hdr_total_size = |
| 1475 | (total_size + (GENL_HDRLEN + |
| 1476 | ((struct genl_family *)&pmcraid_event_family)->hdrsize) |
| 1477 | + NLMSG_HDRLEN); |
| 1478 | skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1479 | |
| 1480 | |
| 1481 | if (!skb) { |
| 1482 | pmcraid_err("Failed to allocate aen data SKB of size: %x\n", |
| 1483 | total_size); |
| 1484 | return -ENOMEM; |
| 1485 | } |
| 1486 | |
| 1487 | /* add the genetlink message header */ |
| 1488 | msg_header = genlmsg_put(skb, 0, 0, |
| 1489 | &pmcraid_event_family, 0, |
| 1490 | PMCRAID_AEN_CMD_EVENT); |
| 1491 | if (!msg_header) { |
| 1492 | pmcraid_err("failed to copy command details\n"); |
| 1493 | nlmsg_free(skb); |
| 1494 | return -ENOMEM; |
| 1495 | } |
| 1496 | |
| 1497 | result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg); |
| 1498 | |
| 1499 | if (result) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1500 | pmcraid_err("failed to copy AEN attribute data\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1501 | nlmsg_free(skb); |
| 1502 | return -EINVAL; |
| 1503 | } |
| 1504 | |
| 1505 | /* send genetlink multicast message to notify appplications */ |
| 1506 | result = genlmsg_end(skb, msg_header); |
| 1507 | |
| 1508 | if (result < 0) { |
| 1509 | pmcraid_err("genlmsg_end failed\n"); |
| 1510 | nlmsg_free(skb); |
| 1511 | return result; |
| 1512 | } |
| 1513 | |
| 1514 | result = |
| 1515 | genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC); |
| 1516 | |
| 1517 | /* If there are no listeners, genlmsg_multicast may return non-zero |
| 1518 | * value. |
| 1519 | */ |
| 1520 | if (result) |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1521 | pmcraid_info("error (%x) sending aen event message\n", result); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1522 | return result; |
| 1523 | } |
| 1524 | |
| 1525 | /** |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1526 | * pmcraid_notify_ccn - notifies about CCN event msg to user space |
| 1527 | * @pinstance: pointer adapter instance structure |
| 1528 | * |
| 1529 | * Return value: |
| 1530 | * 0 if success, error value in case of any failure |
| 1531 | */ |
| 1532 | static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance) |
| 1533 | { |
| 1534 | return pmcraid_notify_aen(pinstance, |
| 1535 | pinstance->ccn.msg, |
| 1536 | pinstance->ccn.hcam->data_len + |
| 1537 | sizeof(struct pmcraid_hcam_hdr)); |
| 1538 | } |
| 1539 | |
| 1540 | /** |
| 1541 | * pmcraid_notify_ldn - notifies about CCN event msg to user space |
| 1542 | * @pinstance: pointer adapter instance structure |
| 1543 | * |
| 1544 | * Return value: |
| 1545 | * 0 if success, error value in case of any failure |
| 1546 | */ |
| 1547 | static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance) |
| 1548 | { |
| 1549 | return pmcraid_notify_aen(pinstance, |
| 1550 | pinstance->ldn.msg, |
| 1551 | pinstance->ldn.hcam->data_len + |
| 1552 | sizeof(struct pmcraid_hcam_hdr)); |
| 1553 | } |
| 1554 | |
| 1555 | /** |
| 1556 | * pmcraid_notify_ioastate - sends IOA state event msg to user space |
| 1557 | * @pinstance: pointer adapter instance structure |
| 1558 | * @evt: controller state event to be sent |
| 1559 | * |
| 1560 | * Return value: |
| 1561 | * 0 if success, error value in case of any failure |
| 1562 | */ |
| 1563 | static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt) |
| 1564 | { |
| 1565 | pinstance->scn.ioa_state = evt; |
| 1566 | pmcraid_notify_aen(pinstance, |
| 1567 | &pinstance->scn.msg, |
| 1568 | sizeof(u32)); |
| 1569 | } |
| 1570 | |
| 1571 | /** |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1572 | * pmcraid_handle_config_change - Handle a config change from the adapter |
| 1573 | * @pinstance: pointer to per adapter instance structure |
| 1574 | * |
| 1575 | * Return value: |
| 1576 | * none |
| 1577 | */ |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 1578 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1579 | static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance) |
| 1580 | { |
| 1581 | struct pmcraid_config_table_entry *cfg_entry; |
| 1582 | struct pmcraid_hcam_ccn *ccn_hcam; |
| 1583 | struct pmcraid_cmd *cmd; |
| 1584 | struct pmcraid_cmd *cfgcmd; |
| 1585 | struct pmcraid_resource_entry *res = NULL; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1586 | unsigned long lock_flags; |
| 1587 | unsigned long host_lock_flags; |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 1588 | u32 new_entry = 1; |
| 1589 | u32 hidden_entry = 0; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1590 | u16 fw_version; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1591 | int rc; |
| 1592 | |
| 1593 | ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam; |
| 1594 | cfg_entry = &ccn_hcam->cfg_entry; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1595 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1596 | |
| 1597 | pmcraid_info |
| 1598 | ("CCN(%x): %x type: %x lost: %x flags: %x res: %x:%x:%x:%x\n", |
| 1599 | pinstance->ccn.hcam->ilid, |
| 1600 | pinstance->ccn.hcam->op_code, |
| 1601 | pinstance->ccn.hcam->notification_type, |
| 1602 | pinstance->ccn.hcam->notification_lost, |
| 1603 | pinstance->ccn.hcam->flags, |
| 1604 | pinstance->host->unique_id, |
| 1605 | RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID : |
| 1606 | (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID : |
| 1607 | RES_BUS(cfg_entry->resource_address)), |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1608 | RES_IS_VSET(*cfg_entry) ? |
| 1609 | (fw_version <= PMCRAID_FW_VERSION_1 ? |
| 1610 | cfg_entry->unique_flags1 : |
| 1611 | cfg_entry->array_id & 0xFF) : |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1612 | RES_TARGET(cfg_entry->resource_address), |
| 1613 | RES_LUN(cfg_entry->resource_address)); |
| 1614 | |
| 1615 | |
| 1616 | /* If this HCAM indicates a lost notification, read the config table */ |
| 1617 | if (pinstance->ccn.hcam->notification_lost) { |
| 1618 | cfgcmd = pmcraid_get_free_cmd(pinstance); |
| 1619 | if (cfgcmd) { |
| 1620 | pmcraid_info("lost CCN, reading config table\b"); |
| 1621 | pinstance->reinit_cfg_table = 1; |
| 1622 | pmcraid_querycfg(cfgcmd); |
| 1623 | } else { |
| 1624 | pmcraid_err("lost CCN, no free cmd for querycfg\n"); |
| 1625 | } |
| 1626 | goto out_notify_apps; |
| 1627 | } |
| 1628 | |
| 1629 | /* If this resource is not going to be added to mid-layer, just notify |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 1630 | * applications and return. If this notification is about hiding a VSET |
| 1631 | * resource, check if it was exposed already. |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1632 | */ |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 1633 | if (pinstance->ccn.hcam->notification_type == |
| 1634 | NOTIFICATION_TYPE_ENTRY_CHANGED && |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1635 | cfg_entry->resource_type == RES_TYPE_VSET) { |
| 1636 | |
| 1637 | if (fw_version <= PMCRAID_FW_VERSION_1) |
| 1638 | hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0; |
| 1639 | else |
| 1640 | hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0; |
| 1641 | |
| 1642 | } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) { |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1643 | goto out_notify_apps; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1644 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1645 | |
| 1646 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
| 1647 | list_for_each_entry(res, &pinstance->used_res_q, queue) { |
| 1648 | rc = memcmp(&res->cfg_entry.resource_address, |
| 1649 | &cfg_entry->resource_address, |
| 1650 | sizeof(cfg_entry->resource_address)); |
| 1651 | if (!rc) { |
| 1652 | new_entry = 0; |
| 1653 | break; |
| 1654 | } |
| 1655 | } |
| 1656 | |
| 1657 | if (new_entry) { |
| 1658 | |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 1659 | if (hidden_entry) { |
| 1660 | spin_unlock_irqrestore(&pinstance->resource_lock, |
| 1661 | lock_flags); |
| 1662 | goto out_notify_apps; |
| 1663 | } |
| 1664 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1665 | /* If there are more number of resources than what driver can |
| 1666 | * manage, do not notify the applications about the CCN. Just |
| 1667 | * ignore this notifications and re-register the same HCAM |
| 1668 | */ |
| 1669 | if (list_empty(&pinstance->free_res_q)) { |
| 1670 | spin_unlock_irqrestore(&pinstance->resource_lock, |
| 1671 | lock_flags); |
| 1672 | pmcraid_err("too many resources attached\n"); |
| 1673 | spin_lock_irqsave(pinstance->host->host_lock, |
| 1674 | host_lock_flags); |
| 1675 | pmcraid_send_hcam(pinstance, |
| 1676 | PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
| 1677 | spin_unlock_irqrestore(pinstance->host->host_lock, |
| 1678 | host_lock_flags); |
| 1679 | return; |
| 1680 | } |
| 1681 | |
| 1682 | res = list_entry(pinstance->free_res_q.next, |
| 1683 | struct pmcraid_resource_entry, queue); |
| 1684 | |
| 1685 | list_del(&res->queue); |
| 1686 | res->scsi_dev = NULL; |
| 1687 | res->reset_progress = 0; |
| 1688 | list_add_tail(&res->queue, &pinstance->used_res_q); |
| 1689 | } |
| 1690 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1691 | memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1692 | |
| 1693 | if (pinstance->ccn.hcam->notification_type == |
Anil Ravindranath | 729c845 | 2009-11-20 09:39:30 -0800 | [diff] [blame] | 1694 | NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) { |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1695 | if (res->scsi_dev) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1696 | if (fw_version <= PMCRAID_FW_VERSION_1) |
| 1697 | res->cfg_entry.unique_flags1 &= 0x7F; |
| 1698 | else |
| 1699 | res->cfg_entry.array_id &= 0xFF; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1700 | res->change_detected = RES_CHANGE_DEL; |
| 1701 | res->cfg_entry.resource_handle = |
| 1702 | PMCRAID_INVALID_RES_HANDLE; |
| 1703 | schedule_work(&pinstance->worker_q); |
| 1704 | } else { |
| 1705 | /* This may be one of the non-exposed resources */ |
| 1706 | list_move_tail(&res->queue, &pinstance->free_res_q); |
| 1707 | } |
| 1708 | } else if (!res->scsi_dev) { |
| 1709 | res->change_detected = RES_CHANGE_ADD; |
| 1710 | schedule_work(&pinstance->worker_q); |
| 1711 | } |
| 1712 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
| 1713 | |
| 1714 | out_notify_apps: |
| 1715 | |
| 1716 | /* Notify configuration changes to registered applications.*/ |
| 1717 | if (!pmcraid_disable_aen) |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1718 | pmcraid_notify_ccn(pinstance); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1719 | |
| 1720 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
| 1721 | if (cmd) |
| 1722 | pmcraid_send_hcam_cmd(cmd); |
| 1723 | } |
| 1724 | |
| 1725 | /** |
| 1726 | * pmcraid_get_error_info - return error string for an ioasc |
| 1727 | * @ioasc: ioasc code |
| 1728 | * Return Value |
| 1729 | * none |
| 1730 | */ |
| 1731 | static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc) |
| 1732 | { |
| 1733 | int i; |
| 1734 | for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) { |
| 1735 | if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc) |
| 1736 | return &pmcraid_ioasc_error_table[i]; |
| 1737 | } |
| 1738 | return NULL; |
| 1739 | } |
| 1740 | |
| 1741 | /** |
| 1742 | * pmcraid_ioasc_logger - log IOASC information based user-settings |
| 1743 | * @ioasc: ioasc code |
| 1744 | * @cmd: pointer to command that resulted in 'ioasc' |
| 1745 | */ |
| 1746 | void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd) |
| 1747 | { |
| 1748 | struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc); |
| 1749 | |
| 1750 | if (error_info == NULL || |
| 1751 | cmd->drv_inst->current_log_level < error_info->log_level) |
| 1752 | return; |
| 1753 | |
| 1754 | /* log the error string */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1755 | pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n", |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1756 | cmd->ioa_cb->ioarcb.cdb[0], |
| 1757 | cmd->ioa_cb->ioarcb.resource_handle, |
| 1758 | le32_to_cpu(ioasc), error_info->error_string); |
| 1759 | } |
| 1760 | |
| 1761 | /** |
| 1762 | * pmcraid_handle_error_log - Handle a config change (error log) from the IOA |
| 1763 | * |
| 1764 | * @pinstance: pointer to per adapter instance structure |
| 1765 | * |
| 1766 | * Return value: |
| 1767 | * none |
| 1768 | */ |
| 1769 | static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance) |
| 1770 | { |
| 1771 | struct pmcraid_hcam_ldn *hcam_ldn; |
| 1772 | u32 ioasc; |
| 1773 | |
| 1774 | hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; |
| 1775 | |
| 1776 | pmcraid_info |
| 1777 | ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n", |
| 1778 | pinstance->ldn.hcam->ilid, |
| 1779 | pinstance->ldn.hcam->op_code, |
| 1780 | pinstance->ldn.hcam->notification_type, |
| 1781 | pinstance->ldn.hcam->notification_lost, |
| 1782 | pinstance->ldn.hcam->flags, |
| 1783 | pinstance->ldn.hcam->overlay_id); |
| 1784 | |
| 1785 | /* log only the errors, no need to log informational log entries */ |
| 1786 | if (pinstance->ldn.hcam->notification_type != |
| 1787 | NOTIFICATION_TYPE_ERROR_LOG) |
| 1788 | return; |
| 1789 | |
| 1790 | if (pinstance->ldn.hcam->notification_lost == |
| 1791 | HOSTRCB_NOTIFICATIONS_LOST) |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 1792 | dev_info(&pinstance->pdev->dev, "Error notifications lost\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1793 | |
| 1794 | ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc); |
| 1795 | |
| 1796 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || |
| 1797 | ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 1798 | dev_info(&pinstance->pdev->dev, |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1799 | "UnitAttention due to IOA Bus Reset\n"); |
| 1800 | scsi_report_bus_reset( |
| 1801 | pinstance->host, |
| 1802 | RES_BUS(hcam_ldn->error_log.fd_ra)); |
| 1803 | } |
| 1804 | |
| 1805 | return; |
| 1806 | } |
| 1807 | |
| 1808 | /** |
| 1809 | * pmcraid_process_ccn - Op done function for a CCN. |
| 1810 | * @cmd: pointer to command struct |
| 1811 | * |
| 1812 | * This function is the op done function for a configuration |
| 1813 | * change notification |
| 1814 | * |
| 1815 | * Return value: |
| 1816 | * none |
| 1817 | */ |
| 1818 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd) |
| 1819 | { |
| 1820 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 1821 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| 1822 | unsigned long lock_flags; |
| 1823 | |
| 1824 | pinstance->ccn.cmd = NULL; |
| 1825 | pmcraid_return_cmd(cmd); |
| 1826 | |
| 1827 | /* If driver initiated IOA reset happened while this hcam was pending |
| 1828 | * with IOA, or IOA bringdown sequence is in progress, no need to |
| 1829 | * re-register the hcam |
| 1830 | */ |
| 1831 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
| 1832 | atomic_read(&pinstance->ccn.ignore) == 1) { |
| 1833 | return; |
| 1834 | } else if (ioasc) { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 1835 | dev_info(&pinstance->pdev->dev, |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1836 | "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc); |
| 1837 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 1838 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
| 1839 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 1840 | } else { |
| 1841 | pmcraid_handle_config_change(pinstance); |
| 1842 | } |
| 1843 | } |
| 1844 | |
| 1845 | /** |
| 1846 | * pmcraid_process_ldn - op done function for an LDN |
| 1847 | * @cmd: pointer to command block |
| 1848 | * |
| 1849 | * Return value |
| 1850 | * none |
| 1851 | */ |
| 1852 | static void pmcraid_initiate_reset(struct pmcraid_instance *); |
| 1853 | |
| 1854 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd) |
| 1855 | { |
| 1856 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 1857 | struct pmcraid_hcam_ldn *ldn_hcam = |
| 1858 | (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; |
| 1859 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| 1860 | u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc); |
| 1861 | unsigned long lock_flags; |
| 1862 | |
| 1863 | /* return the command block back to freepool */ |
| 1864 | pinstance->ldn.cmd = NULL; |
| 1865 | pmcraid_return_cmd(cmd); |
| 1866 | |
| 1867 | /* If driver initiated IOA reset happened while this hcam was pending |
| 1868 | * with IOA, no need to re-register the hcam as reset engine will do it |
| 1869 | * once reset sequence is complete |
| 1870 | */ |
| 1871 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
| 1872 | atomic_read(&pinstance->ccn.ignore) == 1) { |
| 1873 | return; |
| 1874 | } else if (!ioasc) { |
| 1875 | pmcraid_handle_error_log(pinstance); |
| 1876 | if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) { |
| 1877 | spin_lock_irqsave(pinstance->host->host_lock, |
| 1878 | lock_flags); |
| 1879 | pmcraid_initiate_reset(pinstance); |
| 1880 | spin_unlock_irqrestore(pinstance->host->host_lock, |
| 1881 | lock_flags); |
| 1882 | return; |
| 1883 | } |
| 1884 | } else { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 1885 | dev_info(&pinstance->pdev->dev, |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1886 | "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc); |
| 1887 | } |
| 1888 | /* send netlink message for HCAM notification if enabled */ |
| 1889 | if (!pmcraid_disable_aen) |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1890 | pmcraid_notify_ldn(pinstance); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1891 | |
| 1892 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
| 1893 | if (cmd) |
| 1894 | pmcraid_send_hcam_cmd(cmd); |
| 1895 | } |
| 1896 | |
| 1897 | /** |
| 1898 | * pmcraid_register_hcams - register HCAMs for CCN and LDN |
| 1899 | * |
| 1900 | * @pinstance: pointer per adapter instance structure |
| 1901 | * |
| 1902 | * Return Value |
| 1903 | * none |
| 1904 | */ |
| 1905 | static void pmcraid_register_hcams(struct pmcraid_instance *pinstance) |
| 1906 | { |
| 1907 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
| 1908 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
| 1909 | } |
| 1910 | |
| 1911 | /** |
| 1912 | * pmcraid_unregister_hcams - cancel HCAMs registered already |
| 1913 | * @cmd: pointer to command used as part of reset sequence |
| 1914 | */ |
| 1915 | static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd) |
| 1916 | { |
| 1917 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 1918 | |
| 1919 | /* During IOA bringdown, HCAM gets fired and tasklet proceeds with |
| 1920 | * handling hcam response though it is not necessary. In order to |
| 1921 | * prevent this, set 'ignore', so that bring-down sequence doesn't |
| 1922 | * re-send any more hcams |
| 1923 | */ |
| 1924 | atomic_set(&pinstance->ccn.ignore, 1); |
| 1925 | atomic_set(&pinstance->ldn.ignore, 1); |
| 1926 | |
| 1927 | /* If adapter reset was forced as part of runtime reset sequence, |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1928 | * start the reset sequence. Reset will be triggered even in case |
| 1929 | * IOA unit_check. |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1930 | */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1931 | if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) || |
| 1932 | pinstance->ioa_unit_check) { |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1933 | pinstance->force_ioa_reset = 0; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1934 | pinstance->ioa_unit_check = 0; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1935 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| 1936 | pmcraid_reset_alert(cmd); |
| 1937 | return; |
| 1938 | } |
| 1939 | |
| 1940 | /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM |
| 1941 | * one after the other. So CCN cancellation will be triggered by |
| 1942 | * pmcraid_cancel_ldn itself. |
| 1943 | */ |
| 1944 | pmcraid_cancel_ldn(cmd); |
| 1945 | } |
| 1946 | |
| 1947 | /** |
| 1948 | * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset |
| 1949 | * @pinstance: pointer to adapter instance structure |
| 1950 | * Return Value |
| 1951 | * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0 |
| 1952 | */ |
| 1953 | static void pmcraid_reinit_buffers(struct pmcraid_instance *); |
| 1954 | |
| 1955 | static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance) |
| 1956 | { |
| 1957 | u32 intrs; |
| 1958 | |
| 1959 | pmcraid_reinit_buffers(pinstance); |
| 1960 | intrs = pmcraid_read_interrupts(pinstance); |
| 1961 | |
| 1962 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
| 1963 | |
| 1964 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 1965 | if (!pinstance->interrupt_mode) { |
| 1966 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
| 1967 | pinstance->int_regs. |
| 1968 | ioa_host_interrupt_mask_reg); |
| 1969 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
| 1970 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
| 1971 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 1972 | return 1; |
| 1973 | } else { |
| 1974 | return 0; |
| 1975 | } |
| 1976 | } |
| 1977 | |
| 1978 | /** |
| 1979 | * pmcraid_soft_reset - performs a soft reset and makes IOA become ready |
| 1980 | * @cmd : pointer to reset command block |
| 1981 | * |
| 1982 | * Return Value |
| 1983 | * none |
| 1984 | */ |
| 1985 | static void pmcraid_soft_reset(struct pmcraid_cmd *cmd) |
| 1986 | { |
| 1987 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 1988 | u32 int_reg; |
| 1989 | u32 doorbell; |
| 1990 | |
| 1991 | /* There will be an interrupt when Transition to Operational bit is |
| 1992 | * set so tasklet would execute next reset task. The timeout handler |
| 1993 | * would re-initiate a reset |
| 1994 | */ |
| 1995 | cmd->cmd_done = pmcraid_ioa_reset; |
| 1996 | cmd->timer.data = (unsigned long)cmd; |
| 1997 | cmd->timer.expires = jiffies + |
| 1998 | msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT); |
| 1999 | cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler; |
| 2000 | |
| 2001 | if (!timer_pending(&cmd->timer)) |
| 2002 | add_timer(&cmd->timer); |
| 2003 | |
| 2004 | /* Enable destructive diagnostics on IOA if it is not yet in |
| 2005 | * operational state |
| 2006 | */ |
| 2007 | doorbell = DOORBELL_RUNTIME_RESET | |
| 2008 | DOORBELL_ENABLE_DESTRUCTIVE_DIAGS; |
| 2009 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2010 | /* Since we do RESET_ALERT and Start BIST we have to again write |
| 2011 | * MSIX Doorbell to indicate the interrupt mode |
| 2012 | */ |
| 2013 | if (pinstance->interrupt_mode) { |
| 2014 | iowrite32(DOORBELL_INTR_MODE_MSIX, |
| 2015 | pinstance->int_regs.host_ioa_interrupt_reg); |
| 2016 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
| 2017 | } |
| 2018 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2019 | iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2020 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg), |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2021 | int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2022 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2023 | pmcraid_info("Waiting for IOA to become operational %x:%x\n", |
| 2024 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg), |
| 2025 | int_reg); |
| 2026 | } |
| 2027 | |
| 2028 | /** |
| 2029 | * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt |
| 2030 | * |
| 2031 | * @pinstance: pointer to adapter instance structure |
| 2032 | * |
| 2033 | * Return Value |
| 2034 | * none |
| 2035 | */ |
| 2036 | static void pmcraid_get_dump(struct pmcraid_instance *pinstance) |
| 2037 | { |
| 2038 | pmcraid_info("%s is not yet implemented\n", __func__); |
| 2039 | } |
| 2040 | |
| 2041 | /** |
| 2042 | * pmcraid_fail_outstanding_cmds - Fails all outstanding ops. |
| 2043 | * @pinstance: pointer to adapter instance structure |
| 2044 | * |
| 2045 | * This function fails all outstanding ops. If they are submitted to IOA |
| 2046 | * already, it sends cancel all messages if IOA is still accepting IOARCBs, |
| 2047 | * otherwise just completes the commands and returns the cmd blocks to free |
| 2048 | * pool. |
| 2049 | * |
| 2050 | * Return value: |
| 2051 | * none |
| 2052 | */ |
| 2053 | static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance) |
| 2054 | { |
| 2055 | struct pmcraid_cmd *cmd, *temp; |
| 2056 | unsigned long lock_flags; |
| 2057 | |
| 2058 | /* pending command list is protected by pending_pool_lock. Its |
| 2059 | * traversal must be done as within this lock |
| 2060 | */ |
| 2061 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
| 2062 | list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool, |
| 2063 | free_list) { |
| 2064 | list_del(&cmd->free_list); |
| 2065 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
| 2066 | lock_flags); |
| 2067 | cmd->ioa_cb->ioasa.ioasc = |
| 2068 | cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET); |
| 2069 | cmd->ioa_cb->ioasa.ilid = |
| 2070 | cpu_to_be32(PMCRAID_DRIVER_ILID); |
| 2071 | |
| 2072 | /* In case the command timer is still running */ |
| 2073 | del_timer(&cmd->timer); |
| 2074 | |
| 2075 | /* If this is an IO command, complete it by invoking scsi_done |
| 2076 | * function. If this is one of the internal commands other |
| 2077 | * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to |
| 2078 | * complete it |
| 2079 | */ |
| 2080 | if (cmd->scsi_cmd) { |
| 2081 | |
| 2082 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| 2083 | __le32 resp = cmd->ioa_cb->ioarcb.response_handle; |
| 2084 | |
| 2085 | scsi_cmd->result |= DID_ERROR << 16; |
| 2086 | |
| 2087 | scsi_dma_unmap(scsi_cmd); |
| 2088 | pmcraid_return_cmd(cmd); |
| 2089 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2090 | pmcraid_info("failing(%d) CDB[0] = %x result: %x\n", |
| 2091 | le32_to_cpu(resp) >> 2, |
| 2092 | cmd->ioa_cb->ioarcb.cdb[0], |
| 2093 | scsi_cmd->result); |
| 2094 | scsi_cmd->scsi_done(scsi_cmd); |
| 2095 | } else if (cmd->cmd_done == pmcraid_internal_done || |
| 2096 | cmd->cmd_done == pmcraid_erp_done) { |
| 2097 | cmd->cmd_done(cmd); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2098 | } else if (cmd->cmd_done != pmcraid_ioa_reset && |
| 2099 | cmd->cmd_done != pmcraid_ioa_shutdown_done) { |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2100 | pmcraid_return_cmd(cmd); |
| 2101 | } |
| 2102 | |
| 2103 | atomic_dec(&pinstance->outstanding_cmds); |
| 2104 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
| 2105 | } |
| 2106 | |
| 2107 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); |
| 2108 | } |
| 2109 | |
| 2110 | /** |
| 2111 | * pmcraid_ioa_reset - Implementation of IOA reset logic |
| 2112 | * |
| 2113 | * @cmd: pointer to the cmd block to be used for entire reset process |
| 2114 | * |
| 2115 | * This function executes most of the steps required for IOA reset. This gets |
| 2116 | * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's |
| 2117 | * 'eh_' thread. Access to variables used for controling the reset sequence is |
| 2118 | * synchronized using host lock. Various functions called during reset process |
| 2119 | * would make use of a single command block, pointer to which is also stored in |
| 2120 | * adapter instance structure. |
| 2121 | * |
| 2122 | * Return Value |
| 2123 | * None |
| 2124 | */ |
| 2125 | static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd) |
| 2126 | { |
| 2127 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 2128 | u8 reset_complete = 0; |
| 2129 | |
| 2130 | pinstance->ioa_reset_in_progress = 1; |
| 2131 | |
| 2132 | if (pinstance->reset_cmd != cmd) { |
| 2133 | pmcraid_err("reset is called with different command block\n"); |
| 2134 | pinstance->reset_cmd = cmd; |
| 2135 | } |
| 2136 | |
| 2137 | pmcraid_info("reset_engine: state = %d, command = %p\n", |
| 2138 | pinstance->ioa_state, cmd); |
| 2139 | |
| 2140 | switch (pinstance->ioa_state) { |
| 2141 | |
| 2142 | case IOA_STATE_DEAD: |
| 2143 | /* If IOA is offline, whatever may be the reset reason, just |
| 2144 | * return. callers might be waiting on the reset wait_q, wake |
| 2145 | * up them |
| 2146 | */ |
| 2147 | pmcraid_err("IOA is offline no reset is possible\n"); |
| 2148 | reset_complete = 1; |
| 2149 | break; |
| 2150 | |
| 2151 | case IOA_STATE_IN_BRINGDOWN: |
| 2152 | /* we enter here, once ioa shutdown command is processed by IOA |
| 2153 | * Alert IOA for a possible reset. If reset alert fails, IOA |
| 2154 | * goes through hard-reset |
| 2155 | */ |
| 2156 | pmcraid_disable_interrupts(pinstance, ~0); |
| 2157 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| 2158 | pmcraid_reset_alert(cmd); |
| 2159 | break; |
| 2160 | |
| 2161 | case IOA_STATE_UNKNOWN: |
| 2162 | /* We may be called during probe or resume. Some pre-processing |
| 2163 | * is required for prior to reset |
| 2164 | */ |
| 2165 | scsi_block_requests(pinstance->host); |
| 2166 | |
| 2167 | /* If asked to reset while IOA was processing responses or |
| 2168 | * there are any error responses then IOA may require |
| 2169 | * hard-reset. |
| 2170 | */ |
| 2171 | if (pinstance->ioa_hard_reset == 0) { |
| 2172 | if (ioread32(pinstance->ioa_status) & |
| 2173 | INTRS_TRANSITION_TO_OPERATIONAL) { |
| 2174 | pmcraid_info("sticky bit set, bring-up\n"); |
| 2175 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
| 2176 | pmcraid_reinit_cmdblk(cmd); |
| 2177 | pmcraid_identify_hrrq(cmd); |
| 2178 | } else { |
| 2179 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; |
| 2180 | pmcraid_soft_reset(cmd); |
| 2181 | } |
| 2182 | } else { |
| 2183 | /* Alert IOA of a possible reset and wait for critical |
| 2184 | * operation in progress bit to reset |
| 2185 | */ |
| 2186 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| 2187 | pmcraid_reset_alert(cmd); |
| 2188 | } |
| 2189 | break; |
| 2190 | |
| 2191 | case IOA_STATE_IN_RESET_ALERT: |
| 2192 | /* If critical operation in progress bit is reset or wait gets |
| 2193 | * timed out, reset proceeds with starting BIST on the IOA. |
| 2194 | * pmcraid_ioa_hard_reset keeps a count of reset attempts. If |
| 2195 | * they are 3 or more, reset engine marks IOA dead and returns |
| 2196 | */ |
| 2197 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; |
| 2198 | pmcraid_start_bist(cmd); |
| 2199 | break; |
| 2200 | |
| 2201 | case IOA_STATE_IN_HARD_RESET: |
| 2202 | pinstance->ioa_reset_attempts++; |
| 2203 | |
| 2204 | /* retry reset if we haven't reached maximum allowed limit */ |
| 2205 | if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) { |
| 2206 | pinstance->ioa_reset_attempts = 0; |
| 2207 | pmcraid_err("IOA didn't respond marking it as dead\n"); |
| 2208 | pinstance->ioa_state = IOA_STATE_DEAD; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2209 | |
| 2210 | if (pinstance->ioa_bringdown) |
| 2211 | pmcraid_notify_ioastate(pinstance, |
| 2212 | PMC_DEVICE_EVENT_SHUTDOWN_FAILED); |
| 2213 | else |
| 2214 | pmcraid_notify_ioastate(pinstance, |
| 2215 | PMC_DEVICE_EVENT_RESET_FAILED); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2216 | reset_complete = 1; |
| 2217 | break; |
| 2218 | } |
| 2219 | |
| 2220 | /* Once either bist or pci reset is done, restore PCI config |
| 2221 | * space. If this fails, proceed with hard reset again |
| 2222 | */ |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2223 | if (pci_restore_state(pinstance->pdev)) { |
| 2224 | pmcraid_info("config-space error resetting again\n"); |
| 2225 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| 2226 | pmcraid_reset_alert(cmd); |
| 2227 | break; |
| 2228 | } |
| 2229 | |
| 2230 | /* fail all pending commands */ |
| 2231 | pmcraid_fail_outstanding_cmds(pinstance); |
| 2232 | |
| 2233 | /* check if unit check is active, if so extract dump */ |
| 2234 | if (pinstance->ioa_unit_check) { |
| 2235 | pmcraid_info("unit check is active\n"); |
| 2236 | pinstance->ioa_unit_check = 0; |
| 2237 | pmcraid_get_dump(pinstance); |
| 2238 | pinstance->ioa_reset_attempts--; |
| 2239 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| 2240 | pmcraid_reset_alert(cmd); |
| 2241 | break; |
| 2242 | } |
| 2243 | |
| 2244 | /* if the reset reason is to bring-down the ioa, we might be |
| 2245 | * done with the reset restore pci_config_space and complete |
| 2246 | * the reset |
| 2247 | */ |
| 2248 | if (pinstance->ioa_bringdown) { |
| 2249 | pmcraid_info("bringing down the adapter\n"); |
| 2250 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
| 2251 | pinstance->ioa_bringdown = 0; |
| 2252 | pinstance->ioa_state = IOA_STATE_UNKNOWN; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2253 | pmcraid_notify_ioastate(pinstance, |
| 2254 | PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2255 | reset_complete = 1; |
| 2256 | } else { |
| 2257 | /* bring-up IOA, so proceed with soft reset |
| 2258 | * Reinitialize hrrq_buffers and their indices also |
| 2259 | * enable interrupts after a pci_restore_state |
| 2260 | */ |
| 2261 | if (pmcraid_reset_enable_ioa(pinstance)) { |
| 2262 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
| 2263 | pmcraid_info("bringing up the adapter\n"); |
| 2264 | pmcraid_reinit_cmdblk(cmd); |
| 2265 | pmcraid_identify_hrrq(cmd); |
| 2266 | } else { |
| 2267 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; |
| 2268 | pmcraid_soft_reset(cmd); |
| 2269 | } |
| 2270 | } |
| 2271 | break; |
| 2272 | |
| 2273 | case IOA_STATE_IN_SOFT_RESET: |
| 2274 | /* TRANSITION TO OPERATIONAL is on so start initialization |
| 2275 | * sequence |
| 2276 | */ |
| 2277 | pmcraid_info("In softreset proceeding with bring-up\n"); |
| 2278 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
| 2279 | |
| 2280 | /* Initialization commands start with HRRQ identification. From |
| 2281 | * now on tasklet completes most of the commands as IOA is up |
| 2282 | * and intrs are enabled |
| 2283 | */ |
| 2284 | pmcraid_identify_hrrq(cmd); |
| 2285 | break; |
| 2286 | |
| 2287 | case IOA_STATE_IN_BRINGUP: |
| 2288 | /* we are done with bringing up of IOA, change the ioa_state to |
| 2289 | * operational and wake up any waiters |
| 2290 | */ |
| 2291 | pinstance->ioa_state = IOA_STATE_OPERATIONAL; |
| 2292 | reset_complete = 1; |
| 2293 | break; |
| 2294 | |
| 2295 | case IOA_STATE_OPERATIONAL: |
| 2296 | default: |
| 2297 | /* When IOA is operational and a reset is requested, check for |
| 2298 | * the reset reason. If reset is to bring down IOA, unregister |
| 2299 | * HCAMs and initiate shutdown; if adapter reset is forced then |
| 2300 | * restart reset sequence again |
| 2301 | */ |
| 2302 | if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE && |
| 2303 | pinstance->force_ioa_reset == 0) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2304 | pmcraid_notify_ioastate(pinstance, |
| 2305 | PMC_DEVICE_EVENT_RESET_SUCCESS); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2306 | reset_complete = 1; |
| 2307 | } else { |
| 2308 | if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE) |
| 2309 | pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN; |
| 2310 | pmcraid_reinit_cmdblk(cmd); |
| 2311 | pmcraid_unregister_hcams(cmd); |
| 2312 | } |
| 2313 | break; |
| 2314 | } |
| 2315 | |
| 2316 | /* reset will be completed if ioa_state is either DEAD or UNKNOWN or |
| 2317 | * OPERATIONAL. Reset all control variables used during reset, wake up |
| 2318 | * any waiting threads and let the SCSI mid-layer send commands. Note |
| 2319 | * that host_lock must be held before invoking scsi_report_bus_reset. |
| 2320 | */ |
| 2321 | if (reset_complete) { |
| 2322 | pinstance->ioa_reset_in_progress = 0; |
| 2323 | pinstance->ioa_reset_attempts = 0; |
| 2324 | pinstance->reset_cmd = NULL; |
| 2325 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
| 2326 | pinstance->ioa_bringdown = 0; |
| 2327 | pmcraid_return_cmd(cmd); |
| 2328 | |
| 2329 | /* If target state is to bring up the adapter, proceed with |
| 2330 | * hcam registration and resource exposure to mid-layer. |
| 2331 | */ |
| 2332 | if (pinstance->ioa_state == IOA_STATE_OPERATIONAL) |
| 2333 | pmcraid_register_hcams(pinstance); |
| 2334 | |
| 2335 | wake_up_all(&pinstance->reset_wait_q); |
| 2336 | } |
| 2337 | |
| 2338 | return; |
| 2339 | } |
| 2340 | |
| 2341 | /** |
| 2342 | * pmcraid_initiate_reset - initiates reset sequence. This is called from |
| 2343 | * ISR/tasklet during error interrupts including IOA unit check. If reset |
| 2344 | * is already in progress, it just returns, otherwise initiates IOA reset |
| 2345 | * to bring IOA up to operational state. |
| 2346 | * |
| 2347 | * @pinstance: pointer to adapter instance structure |
| 2348 | * |
| 2349 | * Return value |
| 2350 | * none |
| 2351 | */ |
| 2352 | static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance) |
| 2353 | { |
| 2354 | struct pmcraid_cmd *cmd; |
| 2355 | |
| 2356 | /* If the reset is already in progress, just return, otherwise start |
| 2357 | * reset sequence and return |
| 2358 | */ |
| 2359 | if (!pinstance->ioa_reset_in_progress) { |
| 2360 | scsi_block_requests(pinstance->host); |
| 2361 | cmd = pmcraid_get_free_cmd(pinstance); |
| 2362 | |
| 2363 | if (cmd == NULL) { |
| 2364 | pmcraid_err("no cmnd blocks for initiate_reset\n"); |
| 2365 | return; |
| 2366 | } |
| 2367 | |
| 2368 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
| 2369 | pinstance->reset_cmd = cmd; |
| 2370 | pinstance->force_ioa_reset = 1; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2371 | pmcraid_notify_ioastate(pinstance, |
| 2372 | PMC_DEVICE_EVENT_RESET_START); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2373 | pmcraid_ioa_reset(cmd); |
| 2374 | } |
| 2375 | } |
| 2376 | |
| 2377 | /** |
| 2378 | * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup |
| 2379 | * or bringdown IOA |
| 2380 | * @pinstance: pointer adapter instance structure |
| 2381 | * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV |
| 2382 | * @target_state: expected target state after reset |
| 2383 | * |
| 2384 | * Note: This command initiates reset and waits for its completion. Hence this |
| 2385 | * should not be called from isr/timer/tasklet functions (timeout handlers, |
| 2386 | * error response handlers and interrupt handlers). |
| 2387 | * |
| 2388 | * Return Value |
| 2389 | * 1 in case ioa_state is not target_state, 0 otherwise. |
| 2390 | */ |
| 2391 | static int pmcraid_reset_reload( |
| 2392 | struct pmcraid_instance *pinstance, |
| 2393 | u8 shutdown_type, |
| 2394 | u8 target_state |
| 2395 | ) |
| 2396 | { |
| 2397 | struct pmcraid_cmd *reset_cmd = NULL; |
| 2398 | unsigned long lock_flags; |
| 2399 | int reset = 1; |
| 2400 | |
| 2401 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 2402 | |
| 2403 | if (pinstance->ioa_reset_in_progress) { |
| 2404 | pmcraid_info("reset_reload: reset is already in progress\n"); |
| 2405 | |
| 2406 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 2407 | |
| 2408 | wait_event(pinstance->reset_wait_q, |
| 2409 | !pinstance->ioa_reset_in_progress); |
| 2410 | |
| 2411 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 2412 | |
| 2413 | if (pinstance->ioa_state == IOA_STATE_DEAD) { |
| 2414 | spin_unlock_irqrestore(pinstance->host->host_lock, |
| 2415 | lock_flags); |
| 2416 | pmcraid_info("reset_reload: IOA is dead\n"); |
| 2417 | return reset; |
| 2418 | } else if (pinstance->ioa_state == target_state) { |
| 2419 | reset = 0; |
| 2420 | } |
| 2421 | } |
| 2422 | |
| 2423 | if (reset) { |
| 2424 | pmcraid_info("reset_reload: proceeding with reset\n"); |
| 2425 | scsi_block_requests(pinstance->host); |
| 2426 | reset_cmd = pmcraid_get_free_cmd(pinstance); |
| 2427 | |
| 2428 | if (reset_cmd == NULL) { |
| 2429 | pmcraid_err("no free cmnd for reset_reload\n"); |
| 2430 | spin_unlock_irqrestore(pinstance->host->host_lock, |
| 2431 | lock_flags); |
| 2432 | return reset; |
| 2433 | } |
| 2434 | |
| 2435 | if (shutdown_type == SHUTDOWN_NORMAL) |
| 2436 | pinstance->ioa_bringdown = 1; |
| 2437 | |
| 2438 | pinstance->ioa_shutdown_type = shutdown_type; |
| 2439 | pinstance->reset_cmd = reset_cmd; |
| 2440 | pinstance->force_ioa_reset = reset; |
| 2441 | pmcraid_info("reset_reload: initiating reset\n"); |
| 2442 | pmcraid_ioa_reset(reset_cmd); |
| 2443 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 2444 | pmcraid_info("reset_reload: waiting for reset to complete\n"); |
| 2445 | wait_event(pinstance->reset_wait_q, |
| 2446 | !pinstance->ioa_reset_in_progress); |
| 2447 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2448 | pmcraid_info("reset_reload: reset is complete !!\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2449 | scsi_unblock_requests(pinstance->host); |
| 2450 | if (pinstance->ioa_state == target_state) |
| 2451 | reset = 0; |
| 2452 | } |
| 2453 | |
| 2454 | return reset; |
| 2455 | } |
| 2456 | |
| 2457 | /** |
| 2458 | * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA |
| 2459 | * |
| 2460 | * @pinstance: pointer to adapter instance structure |
| 2461 | * |
| 2462 | * Return Value |
| 2463 | * whatever is returned from pmcraid_reset_reload |
| 2464 | */ |
| 2465 | static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance) |
| 2466 | { |
| 2467 | return pmcraid_reset_reload(pinstance, |
| 2468 | SHUTDOWN_NORMAL, |
| 2469 | IOA_STATE_UNKNOWN); |
| 2470 | } |
| 2471 | |
| 2472 | /** |
| 2473 | * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA |
| 2474 | * |
| 2475 | * @pinstance: pointer to adapter instance structure |
| 2476 | * |
| 2477 | * Return Value |
| 2478 | * whatever is returned from pmcraid_reset_reload |
| 2479 | */ |
| 2480 | static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance) |
| 2481 | { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2482 | pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START); |
| 2483 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2484 | return pmcraid_reset_reload(pinstance, |
| 2485 | SHUTDOWN_NONE, |
| 2486 | IOA_STATE_OPERATIONAL); |
| 2487 | } |
| 2488 | |
| 2489 | /** |
| 2490 | * pmcraid_request_sense - Send request sense to a device |
| 2491 | * @cmd: pmcraid command struct |
| 2492 | * |
| 2493 | * This function sends a request sense to a device as a result of a check |
| 2494 | * condition. This method re-uses the same command block that failed earlier. |
| 2495 | */ |
| 2496 | static void pmcraid_request_sense(struct pmcraid_cmd *cmd) |
| 2497 | { |
| 2498 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| 2499 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
| 2500 | |
| 2501 | /* allocate DMAable memory for sense buffers */ |
| 2502 | cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev, |
| 2503 | SCSI_SENSE_BUFFERSIZE, |
| 2504 | &cmd->sense_buffer_dma); |
| 2505 | |
| 2506 | if (cmd->sense_buffer == NULL) { |
| 2507 | pmcraid_err |
| 2508 | ("couldn't allocate sense buffer for request sense\n"); |
| 2509 | pmcraid_erp_done(cmd); |
| 2510 | return; |
| 2511 | } |
| 2512 | |
| 2513 | /* re-use the command block */ |
| 2514 | memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa)); |
| 2515 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
| 2516 | ioarcb->request_flags0 = (SYNC_COMPLETE | |
| 2517 | NO_LINK_DESCS | |
| 2518 | INHIBIT_UL_CHECK); |
| 2519 | ioarcb->request_type = REQ_TYPE_SCSI; |
| 2520 | ioarcb->cdb[0] = REQUEST_SENSE; |
| 2521 | ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE; |
| 2522 | |
| 2523 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| 2524 | offsetof(struct pmcraid_ioarcb, |
| 2525 | add_data.u.ioadl[0])); |
| 2526 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
| 2527 | |
| 2528 | ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); |
| 2529 | |
| 2530 | ioadl->address = cpu_to_le64(cmd->sense_buffer_dma); |
| 2531 | ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); |
Anil Ravindranath | 8819796 | 2009-09-24 16:27:42 -0700 | [diff] [blame] | 2532 | ioadl->flags = IOADL_FLAGS_LAST_DESC; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2533 | |
| 2534 | /* request sense might be called as part of error response processing |
| 2535 | * which runs in tasklets context. It is possible that mid-layer might |
| 2536 | * schedule queuecommand during this time, hence, writting to IOARRIN |
| 2537 | * must be protect by host_lock |
| 2538 | */ |
| 2539 | pmcraid_send_cmd(cmd, pmcraid_erp_done, |
| 2540 | PMCRAID_REQUEST_SENSE_TIMEOUT, |
| 2541 | pmcraid_timeout_handler); |
| 2542 | } |
| 2543 | |
| 2544 | /** |
| 2545 | * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery |
| 2546 | * @cmd: command that failed |
| 2547 | * @sense: true if request_sense is required after cancel all |
| 2548 | * |
| 2549 | * This function sends a cancel all to a device to clear the queue. |
| 2550 | */ |
| 2551 | static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense) |
| 2552 | { |
| 2553 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| 2554 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| 2555 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; |
| 2556 | void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done |
| 2557 | : pmcraid_request_sense; |
| 2558 | |
| 2559 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
| 2560 | ioarcb->request_flags0 = SYNC_OVERRIDE; |
| 2561 | ioarcb->request_type = REQ_TYPE_IOACMD; |
| 2562 | ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS; |
| 2563 | |
| 2564 | if (RES_IS_GSCSI(res->cfg_entry)) |
| 2565 | ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL; |
| 2566 | |
| 2567 | ioarcb->ioadl_bus_addr = 0; |
| 2568 | ioarcb->ioadl_length = 0; |
| 2569 | ioarcb->data_transfer_length = 0; |
| 2570 | ioarcb->ioarcb_bus_addr &= (~0x1FULL); |
| 2571 | |
| 2572 | /* writing to IOARRIN must be protected by host_lock, as mid-layer |
| 2573 | * schedule queuecommand while we are doing this |
| 2574 | */ |
| 2575 | pmcraid_send_cmd(cmd, cmd_done, |
| 2576 | PMCRAID_REQUEST_SENSE_TIMEOUT, |
| 2577 | pmcraid_timeout_handler); |
| 2578 | } |
| 2579 | |
| 2580 | /** |
| 2581 | * pmcraid_frame_auto_sense: frame fixed format sense information |
| 2582 | * |
| 2583 | * @cmd: pointer to failing command block |
| 2584 | * |
| 2585 | * Return value |
| 2586 | * none |
| 2587 | */ |
| 2588 | static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd) |
| 2589 | { |
| 2590 | u8 *sense_buf = cmd->scsi_cmd->sense_buffer; |
| 2591 | struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata; |
| 2592 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; |
| 2593 | u32 ioasc = le32_to_cpu(ioasa->ioasc); |
| 2594 | u32 failing_lba = 0; |
| 2595 | |
| 2596 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
| 2597 | cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION; |
| 2598 | |
| 2599 | if (RES_IS_VSET(res->cfg_entry) && |
| 2600 | ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC && |
| 2601 | ioasa->u.vset.failing_lba_hi != 0) { |
| 2602 | |
| 2603 | sense_buf[0] = 0x72; |
| 2604 | sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc); |
| 2605 | sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc); |
| 2606 | sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc); |
| 2607 | |
| 2608 | sense_buf[7] = 12; |
| 2609 | sense_buf[8] = 0; |
| 2610 | sense_buf[9] = 0x0A; |
| 2611 | sense_buf[10] = 0x80; |
| 2612 | |
| 2613 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi); |
| 2614 | |
| 2615 | sense_buf[12] = (failing_lba & 0xff000000) >> 24; |
| 2616 | sense_buf[13] = (failing_lba & 0x00ff0000) >> 16; |
| 2617 | sense_buf[14] = (failing_lba & 0x0000ff00) >> 8; |
| 2618 | sense_buf[15] = failing_lba & 0x000000ff; |
| 2619 | |
| 2620 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo); |
| 2621 | |
| 2622 | sense_buf[16] = (failing_lba & 0xff000000) >> 24; |
| 2623 | sense_buf[17] = (failing_lba & 0x00ff0000) >> 16; |
| 2624 | sense_buf[18] = (failing_lba & 0x0000ff00) >> 8; |
| 2625 | sense_buf[19] = failing_lba & 0x000000ff; |
| 2626 | } else { |
| 2627 | sense_buf[0] = 0x70; |
| 2628 | sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc); |
| 2629 | sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc); |
| 2630 | sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc); |
| 2631 | |
| 2632 | if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) { |
| 2633 | if (RES_IS_VSET(res->cfg_entry)) |
| 2634 | failing_lba = |
| 2635 | le32_to_cpu(ioasa->u. |
| 2636 | vset.failing_lba_lo); |
| 2637 | sense_buf[0] |= 0x80; |
| 2638 | sense_buf[3] = (failing_lba >> 24) & 0xff; |
| 2639 | sense_buf[4] = (failing_lba >> 16) & 0xff; |
| 2640 | sense_buf[5] = (failing_lba >> 8) & 0xff; |
| 2641 | sense_buf[6] = failing_lba & 0xff; |
| 2642 | } |
| 2643 | |
| 2644 | sense_buf[7] = 6; /* additional length */ |
| 2645 | } |
| 2646 | } |
| 2647 | |
| 2648 | /** |
| 2649 | * pmcraid_error_handler - Error response handlers for a SCSI op |
| 2650 | * @cmd: pointer to pmcraid_cmd that has failed |
| 2651 | * |
| 2652 | * This function determines whether or not to initiate ERP on the affected |
| 2653 | * device. This is called from a tasklet, which doesn't hold any locks. |
| 2654 | * |
| 2655 | * Return value: |
| 2656 | * 0 it caller can complete the request, otherwise 1 where in error |
| 2657 | * handler itself completes the request and returns the command block |
| 2658 | * back to free-pool |
| 2659 | */ |
| 2660 | static int pmcraid_error_handler(struct pmcraid_cmd *cmd) |
| 2661 | { |
| 2662 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| 2663 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; |
| 2664 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 2665 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; |
| 2666 | u32 ioasc = le32_to_cpu(ioasa->ioasc); |
| 2667 | u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK; |
| 2668 | u32 sense_copied = 0; |
| 2669 | |
| 2670 | if (!res) { |
| 2671 | pmcraid_info("resource pointer is NULL\n"); |
| 2672 | return 0; |
| 2673 | } |
| 2674 | |
| 2675 | /* If this was a SCSI read/write command keep count of errors */ |
| 2676 | if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD) |
| 2677 | atomic_inc(&res->read_failures); |
| 2678 | else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD) |
| 2679 | atomic_inc(&res->write_failures); |
| 2680 | |
| 2681 | if (!RES_IS_GSCSI(res->cfg_entry) && |
| 2682 | masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) { |
| 2683 | pmcraid_frame_auto_sense(cmd); |
| 2684 | } |
| 2685 | |
| 2686 | /* Log IOASC/IOASA information based on user settings */ |
| 2687 | pmcraid_ioasc_logger(ioasc, cmd); |
| 2688 | |
| 2689 | switch (masked_ioasc) { |
| 2690 | |
| 2691 | case PMCRAID_IOASC_AC_TERMINATED_BY_HOST: |
| 2692 | scsi_cmd->result |= (DID_ABORT << 16); |
| 2693 | break; |
| 2694 | |
| 2695 | case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE: |
| 2696 | case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE: |
| 2697 | scsi_cmd->result |= (DID_NO_CONNECT << 16); |
| 2698 | break; |
| 2699 | |
| 2700 | case PMCRAID_IOASC_NR_SYNC_REQUIRED: |
| 2701 | res->sync_reqd = 1; |
| 2702 | scsi_cmd->result |= (DID_IMM_RETRY << 16); |
| 2703 | break; |
| 2704 | |
| 2705 | case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC: |
| 2706 | scsi_cmd->result |= (DID_PASSTHROUGH << 16); |
| 2707 | break; |
| 2708 | |
| 2709 | case PMCRAID_IOASC_UA_BUS_WAS_RESET: |
| 2710 | case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER: |
| 2711 | if (!res->reset_progress) |
| 2712 | scsi_report_bus_reset(pinstance->host, |
| 2713 | scsi_cmd->device->channel); |
| 2714 | scsi_cmd->result |= (DID_ERROR << 16); |
| 2715 | break; |
| 2716 | |
| 2717 | case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR: |
| 2718 | scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc); |
| 2719 | res->sync_reqd = 1; |
| 2720 | |
| 2721 | /* if check_condition is not active return with error otherwise |
| 2722 | * get/frame the sense buffer |
| 2723 | */ |
| 2724 | if (PMCRAID_IOASC_SENSE_STATUS(ioasc) != |
| 2725 | SAM_STAT_CHECK_CONDITION && |
| 2726 | PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE) |
| 2727 | return 0; |
| 2728 | |
| 2729 | /* If we have auto sense data as part of IOASA pass it to |
| 2730 | * mid-layer |
| 2731 | */ |
| 2732 | if (ioasa->auto_sense_length != 0) { |
| 2733 | short sense_len = ioasa->auto_sense_length; |
| 2734 | int data_size = min_t(u16, le16_to_cpu(sense_len), |
| 2735 | SCSI_SENSE_BUFFERSIZE); |
| 2736 | |
| 2737 | memcpy(scsi_cmd->sense_buffer, |
| 2738 | ioasa->sense_data, |
| 2739 | data_size); |
| 2740 | sense_copied = 1; |
| 2741 | } |
| 2742 | |
Anil Ravindranath | a70757b | 2009-12-17 14:51:53 -0800 | [diff] [blame] | 2743 | if (RES_IS_GSCSI(res->cfg_entry)) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2744 | pmcraid_cancel_all(cmd, sense_copied); |
Anil Ravindranath | a70757b | 2009-12-17 14:51:53 -0800 | [diff] [blame] | 2745 | else if (sense_copied) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2746 | pmcraid_erp_done(cmd); |
Anil Ravindranath | a70757b | 2009-12-17 14:51:53 -0800 | [diff] [blame] | 2747 | else |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2748 | pmcraid_request_sense(cmd); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2749 | |
| 2750 | return 1; |
| 2751 | |
| 2752 | case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED: |
| 2753 | break; |
| 2754 | |
| 2755 | default: |
| 2756 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR) |
| 2757 | scsi_cmd->result |= (DID_ERROR << 16); |
| 2758 | break; |
| 2759 | } |
| 2760 | return 0; |
| 2761 | } |
| 2762 | |
| 2763 | /** |
| 2764 | * pmcraid_reset_device - device reset handler functions |
| 2765 | * |
| 2766 | * @scsi_cmd: scsi command struct |
| 2767 | * @modifier: reset modifier indicating the reset sequence to be performed |
| 2768 | * |
| 2769 | * This function issues a device reset to the affected device. |
| 2770 | * A LUN reset will be sent to the device first. If that does |
| 2771 | * not work, a target reset will be sent. |
| 2772 | * |
| 2773 | * Return value: |
| 2774 | * SUCCESS / FAILED |
| 2775 | */ |
| 2776 | static int pmcraid_reset_device( |
| 2777 | struct scsi_cmnd *scsi_cmd, |
| 2778 | unsigned long timeout, |
| 2779 | u8 modifier |
| 2780 | ) |
| 2781 | { |
| 2782 | struct pmcraid_cmd *cmd; |
| 2783 | struct pmcraid_instance *pinstance; |
| 2784 | struct pmcraid_resource_entry *res; |
| 2785 | struct pmcraid_ioarcb *ioarcb; |
| 2786 | unsigned long lock_flags; |
| 2787 | u32 ioasc; |
| 2788 | |
| 2789 | pinstance = |
| 2790 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
| 2791 | res = scsi_cmd->device->hostdata; |
| 2792 | |
| 2793 | if (!res) { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 2794 | sdev_printk(KERN_ERR, scsi_cmd->device, |
| 2795 | "reset_device: NULL resource pointer\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2796 | return FAILED; |
| 2797 | } |
| 2798 | |
| 2799 | /* If adapter is currently going through reset/reload, return failed. |
| 2800 | * This will force the mid-layer to call _eh_bus/host reset, which |
| 2801 | * will then go to sleep and wait for the reset to complete |
| 2802 | */ |
| 2803 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 2804 | if (pinstance->ioa_reset_in_progress || |
| 2805 | pinstance->ioa_state == IOA_STATE_DEAD) { |
| 2806 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 2807 | return FAILED; |
| 2808 | } |
| 2809 | |
| 2810 | res->reset_progress = 1; |
| 2811 | pmcraid_info("Resetting %s resource with addr %x\n", |
| 2812 | ((modifier & RESET_DEVICE_LUN) ? "LUN" : |
| 2813 | ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")), |
| 2814 | le32_to_cpu(res->cfg_entry.resource_address)); |
| 2815 | |
| 2816 | /* get a free cmd block */ |
| 2817 | cmd = pmcraid_get_free_cmd(pinstance); |
| 2818 | |
| 2819 | if (cmd == NULL) { |
| 2820 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 2821 | pmcraid_err("%s: no cmd blocks are available\n", __func__); |
| 2822 | return FAILED; |
| 2823 | } |
| 2824 | |
| 2825 | ioarcb = &cmd->ioa_cb->ioarcb; |
| 2826 | ioarcb->resource_handle = res->cfg_entry.resource_handle; |
| 2827 | ioarcb->request_type = REQ_TYPE_IOACMD; |
| 2828 | ioarcb->cdb[0] = PMCRAID_RESET_DEVICE; |
| 2829 | |
| 2830 | /* Initialize reset modifier bits */ |
| 2831 | if (modifier) |
| 2832 | modifier = ENABLE_RESET_MODIFIER | modifier; |
| 2833 | |
| 2834 | ioarcb->cdb[1] = modifier; |
| 2835 | |
| 2836 | init_completion(&cmd->wait_for_completion); |
| 2837 | cmd->completion_req = 1; |
| 2838 | |
| 2839 | pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n", |
| 2840 | cmd->ioa_cb->ioarcb.cdb[0], |
| 2841 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle), |
| 2842 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2); |
| 2843 | |
| 2844 | pmcraid_send_cmd(cmd, |
| 2845 | pmcraid_internal_done, |
| 2846 | timeout, |
| 2847 | pmcraid_timeout_handler); |
| 2848 | |
| 2849 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 2850 | |
| 2851 | /* RESET_DEVICE command completes after all pending IOARCBs are |
| 2852 | * completed. Once this command is completed, pmcraind_internal_done |
| 2853 | * will wake up the 'completion' queue. |
| 2854 | */ |
| 2855 | wait_for_completion(&cmd->wait_for_completion); |
| 2856 | |
| 2857 | /* complete the command here itself and return the command block |
| 2858 | * to free list |
| 2859 | */ |
| 2860 | pmcraid_return_cmd(cmd); |
| 2861 | res->reset_progress = 0; |
| 2862 | ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| 2863 | |
| 2864 | /* set the return value based on the returned ioasc */ |
| 2865 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; |
| 2866 | } |
| 2867 | |
| 2868 | /** |
| 2869 | * _pmcraid_io_done - helper for pmcraid_io_done function |
| 2870 | * |
| 2871 | * @cmd: pointer to pmcraid command struct |
| 2872 | * @reslen: residual data length to be set in the ioasa |
| 2873 | * @ioasc: ioasc either returned by IOA or set by driver itself. |
| 2874 | * |
| 2875 | * This function is invoked by pmcraid_io_done to complete mid-layer |
| 2876 | * scsi ops. |
| 2877 | * |
| 2878 | * Return value: |
| 2879 | * 0 if caller is required to return it to free_pool. Returns 1 if |
| 2880 | * caller need not worry about freeing command block as error handler |
| 2881 | * will take care of that. |
| 2882 | */ |
| 2883 | |
| 2884 | static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc) |
| 2885 | { |
| 2886 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| 2887 | int rc = 0; |
| 2888 | |
| 2889 | scsi_set_resid(scsi_cmd, reslen); |
| 2890 | |
| 2891 | pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n", |
| 2892 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2, |
| 2893 | cmd->ioa_cb->ioarcb.cdb[0], |
| 2894 | ioasc, scsi_cmd->result); |
| 2895 | |
| 2896 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0) |
| 2897 | rc = pmcraid_error_handler(cmd); |
| 2898 | |
| 2899 | if (rc == 0) { |
| 2900 | scsi_dma_unmap(scsi_cmd); |
| 2901 | scsi_cmd->scsi_done(scsi_cmd); |
| 2902 | } |
| 2903 | |
| 2904 | return rc; |
| 2905 | } |
| 2906 | |
| 2907 | /** |
| 2908 | * pmcraid_io_done - SCSI completion function |
| 2909 | * |
| 2910 | * @cmd: pointer to pmcraid command struct |
| 2911 | * |
| 2912 | * This function is invoked by tasklet/mid-layer error handler to completing |
| 2913 | * the SCSI ops sent from mid-layer. |
| 2914 | * |
| 2915 | * Return value |
| 2916 | * none |
| 2917 | */ |
| 2918 | |
| 2919 | static void pmcraid_io_done(struct pmcraid_cmd *cmd) |
| 2920 | { |
| 2921 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| 2922 | u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length); |
| 2923 | |
| 2924 | if (_pmcraid_io_done(cmd, reslen, ioasc) == 0) |
| 2925 | pmcraid_return_cmd(cmd); |
| 2926 | } |
| 2927 | |
| 2928 | /** |
| 2929 | * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA |
| 2930 | * |
| 2931 | * @cmd: command block of the command to be aborted |
| 2932 | * |
| 2933 | * Return Value: |
| 2934 | * returns pointer to command structure used as cancelling cmd |
| 2935 | */ |
| 2936 | static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd) |
| 2937 | { |
| 2938 | struct pmcraid_cmd *cancel_cmd; |
| 2939 | struct pmcraid_instance *pinstance; |
| 2940 | struct pmcraid_resource_entry *res; |
| 2941 | |
| 2942 | pinstance = (struct pmcraid_instance *)cmd->drv_inst; |
| 2943 | res = cmd->scsi_cmd->device->hostdata; |
| 2944 | |
| 2945 | cancel_cmd = pmcraid_get_free_cmd(pinstance); |
| 2946 | |
| 2947 | if (cancel_cmd == NULL) { |
| 2948 | pmcraid_err("%s: no cmd blocks are available\n", __func__); |
| 2949 | return NULL; |
| 2950 | } |
| 2951 | |
| 2952 | pmcraid_prepare_cancel_cmd(cancel_cmd, cmd); |
| 2953 | |
| 2954 | pmcraid_info("aborting command CDB[0]= %x with index = %d\n", |
| 2955 | cmd->ioa_cb->ioarcb.cdb[0], |
| 2956 | cmd->ioa_cb->ioarcb.response_handle >> 2); |
| 2957 | |
| 2958 | init_completion(&cancel_cmd->wait_for_completion); |
| 2959 | cancel_cmd->completion_req = 1; |
| 2960 | |
| 2961 | pmcraid_info("command (%d) CDB[0] = %x for %x\n", |
| 2962 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2, |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2963 | cancel_cmd->ioa_cb->ioarcb.cdb[0], |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2964 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle)); |
| 2965 | |
| 2966 | pmcraid_send_cmd(cancel_cmd, |
| 2967 | pmcraid_internal_done, |
| 2968 | PMCRAID_INTERNAL_TIMEOUT, |
| 2969 | pmcraid_timeout_handler); |
| 2970 | return cancel_cmd; |
| 2971 | } |
| 2972 | |
| 2973 | /** |
| 2974 | * pmcraid_abort_complete - Waits for ABORT TASK completion |
| 2975 | * |
| 2976 | * @cancel_cmd: command block use as cancelling command |
| 2977 | * |
| 2978 | * Return Value: |
| 2979 | * returns SUCCESS if ABORT TASK has good completion |
| 2980 | * otherwise FAILED |
| 2981 | */ |
| 2982 | static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd) |
| 2983 | { |
| 2984 | struct pmcraid_resource_entry *res; |
| 2985 | u32 ioasc; |
| 2986 | |
| 2987 | wait_for_completion(&cancel_cmd->wait_for_completion); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 2988 | res = cancel_cmd->res; |
| 2989 | cancel_cmd->res = NULL; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 2990 | ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc); |
| 2991 | |
| 2992 | /* If the abort task is not timed out we will get a Good completion |
| 2993 | * as sense_key, otherwise we may get one the following responses |
| 2994 | * due to subsquent bus reset or device reset. In case IOASC is |
| 2995 | * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource |
| 2996 | */ |
| 2997 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || |
| 2998 | ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) { |
| 2999 | if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) |
| 3000 | res->sync_reqd = 1; |
| 3001 | ioasc = 0; |
| 3002 | } |
| 3003 | |
| 3004 | /* complete the command here itself */ |
| 3005 | pmcraid_return_cmd(cancel_cmd); |
| 3006 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; |
| 3007 | } |
| 3008 | |
| 3009 | /** |
| 3010 | * pmcraid_eh_abort_handler - entry point for aborting a single task on errors |
| 3011 | * |
| 3012 | * @scsi_cmd: scsi command struct given by mid-layer. When this is called |
| 3013 | * mid-layer ensures that no other commands are queued. This |
| 3014 | * never gets called under interrupt, but a separate eh thread. |
| 3015 | * |
| 3016 | * Return value: |
| 3017 | * SUCCESS / FAILED |
| 3018 | */ |
| 3019 | static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd) |
| 3020 | { |
| 3021 | struct pmcraid_instance *pinstance; |
| 3022 | struct pmcraid_cmd *cmd; |
| 3023 | struct pmcraid_resource_entry *res; |
| 3024 | unsigned long host_lock_flags; |
| 3025 | unsigned long pending_lock_flags; |
| 3026 | struct pmcraid_cmd *cancel_cmd = NULL; |
| 3027 | int cmd_found = 0; |
| 3028 | int rc = FAILED; |
| 3029 | |
| 3030 | pinstance = |
| 3031 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
| 3032 | |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 3033 | scmd_printk(KERN_INFO, scsi_cmd, |
| 3034 | "I/O command timed out, aborting it.\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3035 | |
| 3036 | res = scsi_cmd->device->hostdata; |
| 3037 | |
| 3038 | if (res == NULL) |
| 3039 | return rc; |
| 3040 | |
| 3041 | /* If we are currently going through reset/reload, return failed. |
| 3042 | * This will force the mid-layer to eventually call |
| 3043 | * pmcraid_eh_host_reset which will then go to sleep and wait for the |
| 3044 | * reset to complete |
| 3045 | */ |
| 3046 | spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags); |
| 3047 | |
| 3048 | if (pinstance->ioa_reset_in_progress || |
| 3049 | pinstance->ioa_state == IOA_STATE_DEAD) { |
| 3050 | spin_unlock_irqrestore(pinstance->host->host_lock, |
| 3051 | host_lock_flags); |
| 3052 | return rc; |
| 3053 | } |
| 3054 | |
| 3055 | /* loop over pending cmd list to find cmd corresponding to this |
| 3056 | * scsi_cmd. Note that this command might not have been completed |
| 3057 | * already. locking: all pending commands are protected with |
| 3058 | * pending_pool_lock. |
| 3059 | */ |
| 3060 | spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags); |
| 3061 | list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) { |
| 3062 | |
| 3063 | if (cmd->scsi_cmd == scsi_cmd) { |
| 3064 | cmd_found = 1; |
| 3065 | break; |
| 3066 | } |
| 3067 | } |
| 3068 | |
| 3069 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
| 3070 | pending_lock_flags); |
| 3071 | |
| 3072 | /* If the command to be aborted was given to IOA and still pending with |
| 3073 | * it, send ABORT_TASK to abort this and wait for its completion |
| 3074 | */ |
| 3075 | if (cmd_found) |
| 3076 | cancel_cmd = pmcraid_abort_cmd(cmd); |
| 3077 | |
| 3078 | spin_unlock_irqrestore(pinstance->host->host_lock, |
| 3079 | host_lock_flags); |
| 3080 | |
| 3081 | if (cancel_cmd) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3082 | cancel_cmd->res = cmd->scsi_cmd->device->hostdata; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3083 | rc = pmcraid_abort_complete(cancel_cmd); |
| 3084 | } |
| 3085 | |
| 3086 | return cmd_found ? rc : SUCCESS; |
| 3087 | } |
| 3088 | |
| 3089 | /** |
| 3090 | * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks |
| 3091 | * |
| 3092 | * @scmd: pointer to scsi_cmd that was sent to the resource to be reset. |
| 3093 | * |
| 3094 | * All these routines invokve pmcraid_reset_device with appropriate parameters. |
| 3095 | * Since these are called from mid-layer EH thread, no other IO will be queued |
| 3096 | * to the resource being reset. However, control path (IOCTL) may be active so |
| 3097 | * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device |
| 3098 | * takes care by locking/unlocking host_lock. |
| 3099 | * |
| 3100 | * Return value |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3101 | * SUCCESS or FAILED |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3102 | */ |
| 3103 | static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd) |
| 3104 | { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 3105 | scmd_printk(KERN_INFO, scmd, |
| 3106 | "resetting device due to an I/O command timeout.\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3107 | return pmcraid_reset_device(scmd, |
| 3108 | PMCRAID_INTERNAL_TIMEOUT, |
| 3109 | RESET_DEVICE_LUN); |
| 3110 | } |
| 3111 | |
| 3112 | static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd) |
| 3113 | { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 3114 | scmd_printk(KERN_INFO, scmd, |
| 3115 | "Doing bus reset due to an I/O command timeout.\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3116 | return pmcraid_reset_device(scmd, |
| 3117 | PMCRAID_RESET_BUS_TIMEOUT, |
| 3118 | RESET_DEVICE_BUS); |
| 3119 | } |
| 3120 | |
| 3121 | static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd) |
| 3122 | { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 3123 | scmd_printk(KERN_INFO, scmd, |
| 3124 | "Doing target reset due to an I/O command timeout.\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3125 | return pmcraid_reset_device(scmd, |
| 3126 | PMCRAID_INTERNAL_TIMEOUT, |
| 3127 | RESET_DEVICE_TARGET); |
| 3128 | } |
| 3129 | |
| 3130 | /** |
| 3131 | * pmcraid_eh_host_reset_handler - adapter reset handler callback |
| 3132 | * |
| 3133 | * @scmd: pointer to scsi_cmd that was sent to a resource of adapter |
| 3134 | * |
| 3135 | * Initiates adapter reset to bring it up to operational state |
| 3136 | * |
| 3137 | * Return value |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3138 | * SUCCESS or FAILED |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3139 | */ |
| 3140 | static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd) |
| 3141 | { |
| 3142 | unsigned long interval = 10000; /* 10 seconds interval */ |
| 3143 | int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval; |
| 3144 | struct pmcraid_instance *pinstance = |
| 3145 | (struct pmcraid_instance *)(scmd->device->host->hostdata); |
| 3146 | |
| 3147 | |
| 3148 | /* wait for an additional 150 seconds just in case firmware could come |
| 3149 | * up and if it could complete all the pending commands excluding the |
| 3150 | * two HCAM (CCN and LDN). |
| 3151 | */ |
| 3152 | while (waits--) { |
| 3153 | if (atomic_read(&pinstance->outstanding_cmds) <= |
| 3154 | PMCRAID_MAX_HCAM_CMD) |
| 3155 | return SUCCESS; |
| 3156 | msleep(interval); |
| 3157 | } |
| 3158 | |
| 3159 | dev_err(&pinstance->pdev->dev, |
| 3160 | "Adapter being reset due to an I/O command timeout.\n"); |
| 3161 | return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED; |
| 3162 | } |
| 3163 | |
| 3164 | /** |
| 3165 | * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes |
| 3166 | * @scsi_cmd: scsi command struct |
| 3167 | * |
| 3168 | * Return value |
| 3169 | * number of tags or 0 if the task is not tagged |
| 3170 | */ |
| 3171 | static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd) |
| 3172 | { |
| 3173 | char tag[2]; |
| 3174 | u8 rc = 0; |
| 3175 | |
| 3176 | if (scsi_populate_tag_msg(scsi_cmd, tag)) { |
| 3177 | switch (tag[0]) { |
| 3178 | case MSG_SIMPLE_TAG: |
| 3179 | rc = TASK_TAG_SIMPLE; |
| 3180 | break; |
| 3181 | case MSG_HEAD_TAG: |
| 3182 | rc = TASK_TAG_QUEUE_HEAD; |
| 3183 | break; |
| 3184 | case MSG_ORDERED_TAG: |
| 3185 | rc = TASK_TAG_ORDERED; |
| 3186 | break; |
| 3187 | }; |
| 3188 | } |
| 3189 | |
| 3190 | return rc; |
| 3191 | } |
| 3192 | |
| 3193 | |
| 3194 | /** |
| 3195 | * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB |
| 3196 | * @cmd: pmcraid command struct |
| 3197 | * @sgcount: count of scatter-gather elements |
| 3198 | * |
| 3199 | * Return value |
| 3200 | * returns pointer pmcraid_ioadl_desc, initialized to point to internal |
| 3201 | * or external IOADLs |
| 3202 | */ |
| 3203 | struct pmcraid_ioadl_desc * |
| 3204 | pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount) |
| 3205 | { |
| 3206 | struct pmcraid_ioadl_desc *ioadl; |
| 3207 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| 3208 | int ioadl_count = 0; |
| 3209 | |
| 3210 | if (ioarcb->add_cmd_param_length) |
| 3211 | ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16); |
| 3212 | ioarcb->ioadl_length = |
| 3213 | sizeof(struct pmcraid_ioadl_desc) * sgcount; |
| 3214 | |
| 3215 | if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) { |
| 3216 | /* external ioadls start at offset 0x80 from control_block |
| 3217 | * structure, re-using 24 out of 27 ioadls part of IOARCB. |
| 3218 | * It is necessary to indicate to firmware that driver is |
| 3219 | * using ioadls to be treated as external to IOARCB. |
| 3220 | */ |
| 3221 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
| 3222 | ioarcb->ioadl_bus_addr = |
| 3223 | cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| 3224 | offsetof(struct pmcraid_ioarcb, |
| 3225 | add_data.u.ioadl[3])); |
| 3226 | ioadl = &ioarcb->add_data.u.ioadl[3]; |
| 3227 | } else { |
| 3228 | ioarcb->ioadl_bus_addr = |
| 3229 | cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| 3230 | offsetof(struct pmcraid_ioarcb, |
| 3231 | add_data.u.ioadl[ioadl_count])); |
| 3232 | |
| 3233 | ioadl = &ioarcb->add_data.u.ioadl[ioadl_count]; |
| 3234 | ioarcb->ioarcb_bus_addr |= |
| 3235 | DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8); |
| 3236 | } |
| 3237 | |
| 3238 | return ioadl; |
| 3239 | } |
| 3240 | |
| 3241 | /** |
| 3242 | * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer |
| 3243 | * @pinstance: pointer to adapter instance structure |
| 3244 | * @cmd: pmcraid command struct |
| 3245 | * |
| 3246 | * This function is invoked by queuecommand entry point while sending a command |
| 3247 | * to firmware. This builds ioadl descriptors and sets up ioarcb fields. |
| 3248 | * |
| 3249 | * Return value: |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3250 | * 0 on success or -1 on failure |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3251 | */ |
| 3252 | static int pmcraid_build_ioadl( |
| 3253 | struct pmcraid_instance *pinstance, |
| 3254 | struct pmcraid_cmd *cmd |
| 3255 | ) |
| 3256 | { |
| 3257 | int i, nseg; |
| 3258 | struct scatterlist *sglist; |
| 3259 | |
| 3260 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| 3261 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); |
| 3262 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
| 3263 | |
| 3264 | u32 length = scsi_bufflen(scsi_cmd); |
| 3265 | |
| 3266 | if (!length) |
| 3267 | return 0; |
| 3268 | |
| 3269 | nseg = scsi_dma_map(scsi_cmd); |
| 3270 | |
| 3271 | if (nseg < 0) { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 3272 | scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3273 | return -1; |
| 3274 | } else if (nseg > PMCRAID_MAX_IOADLS) { |
| 3275 | scsi_dma_unmap(scsi_cmd); |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 3276 | scmd_printk(KERN_ERR, scsi_cmd, |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3277 | "sg count is (%d) more than allowed!\n", nseg); |
| 3278 | return -1; |
| 3279 | } |
| 3280 | |
| 3281 | /* Initialize IOARCB data transfer length fields */ |
| 3282 | if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) |
| 3283 | ioarcb->request_flags0 |= TRANSFER_DIR_WRITE; |
| 3284 | |
| 3285 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
| 3286 | ioarcb->data_transfer_length = cpu_to_le32(length); |
| 3287 | ioadl = pmcraid_init_ioadls(cmd, nseg); |
| 3288 | |
| 3289 | /* Initialize IOADL descriptor addresses */ |
| 3290 | scsi_for_each_sg(scsi_cmd, sglist, nseg, i) { |
| 3291 | ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist)); |
| 3292 | ioadl[i].address = cpu_to_le64(sg_dma_address(sglist)); |
| 3293 | ioadl[i].flags = 0; |
| 3294 | } |
| 3295 | /* setup last descriptor */ |
Anil Ravindranath | 8819796 | 2009-09-24 16:27:42 -0700 | [diff] [blame] | 3296 | ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3297 | |
| 3298 | return 0; |
| 3299 | } |
| 3300 | |
| 3301 | /** |
| 3302 | * pmcraid_free_sglist - Frees an allocated SG buffer list |
| 3303 | * @sglist: scatter/gather list pointer |
| 3304 | * |
| 3305 | * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist |
| 3306 | * |
| 3307 | * Return value: |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3308 | * none |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3309 | */ |
| 3310 | static void pmcraid_free_sglist(struct pmcraid_sglist *sglist) |
| 3311 | { |
| 3312 | int i; |
| 3313 | |
| 3314 | for (i = 0; i < sglist->num_sg; i++) |
| 3315 | __free_pages(sg_page(&(sglist->scatterlist[i])), |
| 3316 | sglist->order); |
| 3317 | |
| 3318 | kfree(sglist); |
| 3319 | } |
| 3320 | |
| 3321 | /** |
| 3322 | * pmcraid_alloc_sglist - Allocates memory for a SG list |
| 3323 | * @buflen: buffer length |
| 3324 | * |
| 3325 | * Allocates a DMA'able buffer in chunks and assembles a scatter/gather |
| 3326 | * list. |
| 3327 | * |
| 3328 | * Return value |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3329 | * pointer to sglist / NULL on failure |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3330 | */ |
| 3331 | static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen) |
| 3332 | { |
| 3333 | struct pmcraid_sglist *sglist; |
| 3334 | struct scatterlist *scatterlist; |
| 3335 | struct page *page; |
| 3336 | int num_elem, i, j; |
| 3337 | int sg_size; |
| 3338 | int order; |
| 3339 | int bsize_elem; |
| 3340 | |
| 3341 | sg_size = buflen / (PMCRAID_MAX_IOADLS - 1); |
| 3342 | order = (sg_size > 0) ? get_order(sg_size) : 0; |
| 3343 | bsize_elem = PAGE_SIZE * (1 << order); |
| 3344 | |
| 3345 | /* Determine the actual number of sg entries needed */ |
| 3346 | if (buflen % bsize_elem) |
| 3347 | num_elem = (buflen / bsize_elem) + 1; |
| 3348 | else |
| 3349 | num_elem = buflen / bsize_elem; |
| 3350 | |
| 3351 | /* Allocate a scatter/gather list for the DMA */ |
| 3352 | sglist = kzalloc(sizeof(struct pmcraid_sglist) + |
| 3353 | (sizeof(struct scatterlist) * (num_elem - 1)), |
| 3354 | GFP_KERNEL); |
| 3355 | |
| 3356 | if (sglist == NULL) |
| 3357 | return NULL; |
| 3358 | |
| 3359 | scatterlist = sglist->scatterlist; |
| 3360 | sg_init_table(scatterlist, num_elem); |
| 3361 | sglist->order = order; |
| 3362 | sglist->num_sg = num_elem; |
| 3363 | sg_size = buflen; |
| 3364 | |
| 3365 | for (i = 0; i < num_elem; i++) { |
| 3366 | page = alloc_pages(GFP_KERNEL|GFP_DMA, order); |
| 3367 | if (!page) { |
| 3368 | for (j = i - 1; j >= 0; j--) |
| 3369 | __free_pages(sg_page(&scatterlist[j]), order); |
| 3370 | kfree(sglist); |
| 3371 | return NULL; |
| 3372 | } |
| 3373 | |
| 3374 | sg_set_page(&scatterlist[i], page, |
| 3375 | sg_size < bsize_elem ? sg_size : bsize_elem, 0); |
| 3376 | sg_size -= bsize_elem; |
| 3377 | } |
| 3378 | |
| 3379 | return sglist; |
| 3380 | } |
| 3381 | |
| 3382 | /** |
| 3383 | * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list |
| 3384 | * @sglist: scatter/gather list pointer |
| 3385 | * @buffer: buffer pointer |
| 3386 | * @len: buffer length |
| 3387 | * @direction: data transfer direction |
| 3388 | * |
| 3389 | * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist |
| 3390 | * |
| 3391 | * Return value: |
| 3392 | * 0 on success / other on failure |
| 3393 | */ |
| 3394 | static int pmcraid_copy_sglist( |
| 3395 | struct pmcraid_sglist *sglist, |
| 3396 | unsigned long buffer, |
| 3397 | u32 len, |
| 3398 | int direction |
| 3399 | ) |
| 3400 | { |
| 3401 | struct scatterlist *scatterlist; |
| 3402 | void *kaddr; |
| 3403 | int bsize_elem; |
| 3404 | int i; |
| 3405 | int rc = 0; |
| 3406 | |
| 3407 | /* Determine the actual number of bytes per element */ |
| 3408 | bsize_elem = PAGE_SIZE * (1 << sglist->order); |
| 3409 | |
| 3410 | scatterlist = sglist->scatterlist; |
| 3411 | |
| 3412 | for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) { |
| 3413 | struct page *page = sg_page(&scatterlist[i]); |
| 3414 | |
| 3415 | kaddr = kmap(page); |
| 3416 | if (direction == DMA_TO_DEVICE) |
| 3417 | rc = __copy_from_user(kaddr, |
| 3418 | (void *)buffer, |
| 3419 | bsize_elem); |
| 3420 | else |
| 3421 | rc = __copy_to_user((void *)buffer, kaddr, bsize_elem); |
| 3422 | |
| 3423 | kunmap(page); |
| 3424 | |
| 3425 | if (rc) { |
| 3426 | pmcraid_err("failed to copy user data into sg list\n"); |
| 3427 | return -EFAULT; |
| 3428 | } |
| 3429 | |
| 3430 | scatterlist[i].length = bsize_elem; |
| 3431 | } |
| 3432 | |
| 3433 | if (len % bsize_elem) { |
| 3434 | struct page *page = sg_page(&scatterlist[i]); |
| 3435 | |
| 3436 | kaddr = kmap(page); |
| 3437 | |
| 3438 | if (direction == DMA_TO_DEVICE) |
| 3439 | rc = __copy_from_user(kaddr, |
| 3440 | (void *)buffer, |
| 3441 | len % bsize_elem); |
| 3442 | else |
| 3443 | rc = __copy_to_user((void *)buffer, |
| 3444 | kaddr, |
| 3445 | len % bsize_elem); |
| 3446 | |
| 3447 | kunmap(page); |
| 3448 | |
| 3449 | scatterlist[i].length = len % bsize_elem; |
| 3450 | } |
| 3451 | |
| 3452 | if (rc) { |
| 3453 | pmcraid_err("failed to copy user data into sg list\n"); |
| 3454 | rc = -EFAULT; |
| 3455 | } |
| 3456 | |
| 3457 | return rc; |
| 3458 | } |
| 3459 | |
| 3460 | /** |
| 3461 | * pmcraid_queuecommand - Queue a mid-layer request |
| 3462 | * @scsi_cmd: scsi command struct |
| 3463 | * @done: done function |
| 3464 | * |
| 3465 | * This function queues a request generated by the mid-layer. Midlayer calls |
| 3466 | * this routine within host->lock. Some of the functions called by queuecommand |
| 3467 | * would use cmd block queue locks (free_pool_lock and pending_pool_lock) |
| 3468 | * |
| 3469 | * Return value: |
| 3470 | * 0 on success |
| 3471 | * SCSI_MLQUEUE_DEVICE_BUSY if device is busy |
| 3472 | * SCSI_MLQUEUE_HOST_BUSY if host is busy |
| 3473 | */ |
| 3474 | static int pmcraid_queuecommand( |
| 3475 | struct scsi_cmnd *scsi_cmd, |
| 3476 | void (*done) (struct scsi_cmnd *) |
| 3477 | ) |
| 3478 | { |
| 3479 | struct pmcraid_instance *pinstance; |
| 3480 | struct pmcraid_resource_entry *res; |
| 3481 | struct pmcraid_ioarcb *ioarcb; |
| 3482 | struct pmcraid_cmd *cmd; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3483 | u32 fw_version; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3484 | int rc = 0; |
| 3485 | |
| 3486 | pinstance = |
| 3487 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3488 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3489 | scsi_cmd->scsi_done = done; |
| 3490 | res = scsi_cmd->device->hostdata; |
| 3491 | scsi_cmd->result = (DID_OK << 16); |
| 3492 | |
| 3493 | /* if adapter is marked as dead, set result to DID_NO_CONNECT complete |
| 3494 | * the command |
| 3495 | */ |
| 3496 | if (pinstance->ioa_state == IOA_STATE_DEAD) { |
| 3497 | pmcraid_info("IOA is dead, but queuecommand is scheduled\n"); |
| 3498 | scsi_cmd->result = (DID_NO_CONNECT << 16); |
| 3499 | scsi_cmd->scsi_done(scsi_cmd); |
| 3500 | return 0; |
| 3501 | } |
| 3502 | |
| 3503 | /* If IOA reset is in progress, can't queue the commands */ |
| 3504 | if (pinstance->ioa_reset_in_progress) |
| 3505 | return SCSI_MLQUEUE_HOST_BUSY; |
| 3506 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3507 | /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete |
| 3508 | * the command here itself with success return |
| 3509 | */ |
| 3510 | if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) { |
| 3511 | pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n"); |
| 3512 | scsi_cmd->scsi_done(scsi_cmd); |
| 3513 | return 0; |
| 3514 | } |
| 3515 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3516 | /* initialize the command and IOARCB to be sent to IOA */ |
| 3517 | cmd = pmcraid_get_free_cmd(pinstance); |
| 3518 | |
| 3519 | if (cmd == NULL) { |
| 3520 | pmcraid_err("free command block is not available\n"); |
| 3521 | return SCSI_MLQUEUE_HOST_BUSY; |
| 3522 | } |
| 3523 | |
| 3524 | cmd->scsi_cmd = scsi_cmd; |
| 3525 | ioarcb = &(cmd->ioa_cb->ioarcb); |
| 3526 | memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len); |
| 3527 | ioarcb->resource_handle = res->cfg_entry.resource_handle; |
| 3528 | ioarcb->request_type = REQ_TYPE_SCSI; |
| 3529 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3530 | /* set hrrq number where the IOA should respond to. Note that all cmds |
| 3531 | * generated internally uses hrrq_id 0, exception to this is the cmd |
| 3532 | * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses |
| 3533 | * hrrq_id assigned here in queuecommand |
| 3534 | */ |
| 3535 | ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) % |
| 3536 | pinstance->num_hrrq; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3537 | cmd->cmd_done = pmcraid_io_done; |
| 3538 | |
| 3539 | if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) { |
| 3540 | if (scsi_cmd->underflow == 0) |
| 3541 | ioarcb->request_flags0 |= INHIBIT_UL_CHECK; |
| 3542 | |
| 3543 | if (res->sync_reqd) { |
| 3544 | ioarcb->request_flags0 |= SYNC_COMPLETE; |
| 3545 | res->sync_reqd = 0; |
| 3546 | } |
| 3547 | |
| 3548 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
| 3549 | ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd); |
| 3550 | |
| 3551 | if (RES_IS_GSCSI(res->cfg_entry)) |
| 3552 | ioarcb->request_flags1 |= DELAY_AFTER_RESET; |
| 3553 | } |
| 3554 | |
| 3555 | rc = pmcraid_build_ioadl(pinstance, cmd); |
| 3556 | |
| 3557 | pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n", |
| 3558 | le32_to_cpu(ioarcb->response_handle) >> 2, |
| 3559 | scsi_cmd->cmnd[0], pinstance->host->unique_id, |
| 3560 | RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID : |
| 3561 | PMCRAID_PHYS_BUS_ID, |
| 3562 | RES_IS_VSET(res->cfg_entry) ? |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3563 | (fw_version <= PMCRAID_FW_VERSION_1 ? |
| 3564 | res->cfg_entry.unique_flags1 : |
| 3565 | res->cfg_entry.array_id & 0xFF) : |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3566 | RES_TARGET(res->cfg_entry.resource_address), |
| 3567 | RES_LUN(res->cfg_entry.resource_address)); |
| 3568 | |
| 3569 | if (likely(rc == 0)) { |
| 3570 | _pmcraid_fire_command(cmd); |
| 3571 | } else { |
| 3572 | pmcraid_err("queuecommand could not build ioadl\n"); |
| 3573 | pmcraid_return_cmd(cmd); |
| 3574 | rc = SCSI_MLQUEUE_HOST_BUSY; |
| 3575 | } |
| 3576 | |
| 3577 | return rc; |
| 3578 | } |
| 3579 | |
| 3580 | /** |
| 3581 | * pmcraid_open -char node "open" entry, allowed only users with admin access |
| 3582 | */ |
| 3583 | static int pmcraid_chr_open(struct inode *inode, struct file *filep) |
| 3584 | { |
| 3585 | struct pmcraid_instance *pinstance; |
| 3586 | |
| 3587 | if (!capable(CAP_SYS_ADMIN)) |
| 3588 | return -EACCES; |
| 3589 | |
| 3590 | /* Populate adapter instance * pointer for use by ioctl */ |
| 3591 | pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev); |
| 3592 | filep->private_data = pinstance; |
| 3593 | |
| 3594 | return 0; |
| 3595 | } |
| 3596 | |
| 3597 | /** |
| 3598 | * pmcraid_release - char node "release" entry point |
| 3599 | */ |
| 3600 | static int pmcraid_chr_release(struct inode *inode, struct file *filep) |
| 3601 | { |
| 3602 | struct pmcraid_instance *pinstance = |
| 3603 | ((struct pmcraid_instance *)filep->private_data); |
| 3604 | |
| 3605 | filep->private_data = NULL; |
| 3606 | fasync_helper(-1, filep, 0, &pinstance->aen_queue); |
| 3607 | |
| 3608 | return 0; |
| 3609 | } |
| 3610 | |
| 3611 | /** |
| 3612 | * pmcraid_fasync - Async notifier registration from applications |
| 3613 | * |
| 3614 | * This function adds the calling process to a driver global queue. When an |
| 3615 | * event occurs, SIGIO will be sent to all processes in this queue. |
| 3616 | */ |
| 3617 | static int pmcraid_chr_fasync(int fd, struct file *filep, int mode) |
| 3618 | { |
| 3619 | struct pmcraid_instance *pinstance; |
| 3620 | int rc; |
| 3621 | |
| 3622 | pinstance = (struct pmcraid_instance *)filep->private_data; |
| 3623 | mutex_lock(&pinstance->aen_queue_lock); |
| 3624 | rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue); |
| 3625 | mutex_unlock(&pinstance->aen_queue_lock); |
| 3626 | |
| 3627 | return rc; |
| 3628 | } |
| 3629 | |
| 3630 | |
| 3631 | /** |
| 3632 | * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough |
| 3633 | * commands sent over IOCTL interface |
| 3634 | * |
| 3635 | * @cmd : pointer to struct pmcraid_cmd |
| 3636 | * @buflen : length of the request buffer |
| 3637 | * @direction : data transfer direction |
| 3638 | * |
| 3639 | * Return value |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 3640 | * 0 on success, non-zero error code on failure |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3641 | */ |
| 3642 | static int pmcraid_build_passthrough_ioadls( |
| 3643 | struct pmcraid_cmd *cmd, |
| 3644 | int buflen, |
| 3645 | int direction |
| 3646 | ) |
| 3647 | { |
| 3648 | struct pmcraid_sglist *sglist = NULL; |
| 3649 | struct scatterlist *sg = NULL; |
| 3650 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| 3651 | struct pmcraid_ioadl_desc *ioadl; |
| 3652 | int i; |
| 3653 | |
| 3654 | sglist = pmcraid_alloc_sglist(buflen); |
| 3655 | |
| 3656 | if (!sglist) { |
| 3657 | pmcraid_err("can't allocate memory for passthrough SGls\n"); |
| 3658 | return -ENOMEM; |
| 3659 | } |
| 3660 | |
| 3661 | sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev, |
| 3662 | sglist->scatterlist, |
| 3663 | sglist->num_sg, direction); |
| 3664 | |
| 3665 | if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) { |
| 3666 | dev_err(&cmd->drv_inst->pdev->dev, |
| 3667 | "Failed to map passthrough buffer!\n"); |
| 3668 | pmcraid_free_sglist(sglist); |
| 3669 | return -EIO; |
| 3670 | } |
| 3671 | |
| 3672 | cmd->sglist = sglist; |
| 3673 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
| 3674 | |
| 3675 | ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg); |
| 3676 | |
| 3677 | /* Initialize IOADL descriptor addresses */ |
| 3678 | for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) { |
| 3679 | ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg)); |
| 3680 | ioadl[i].address = cpu_to_le64(sg_dma_address(sg)); |
| 3681 | ioadl[i].flags = 0; |
| 3682 | } |
| 3683 | |
| 3684 | /* setup the last descriptor */ |
Anil Ravindranath | 8819796 | 2009-09-24 16:27:42 -0700 | [diff] [blame] | 3685 | ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3686 | |
| 3687 | return 0; |
| 3688 | } |
| 3689 | |
| 3690 | |
| 3691 | /** |
| 3692 | * pmcraid_release_passthrough_ioadls - release passthrough ioadls |
| 3693 | * |
| 3694 | * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated |
| 3695 | * @buflen: size of the request buffer |
| 3696 | * @direction: data transfer direction |
| 3697 | * |
| 3698 | * Return value |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 3699 | * 0 on success, non-zero error code on failure |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3700 | */ |
| 3701 | static void pmcraid_release_passthrough_ioadls( |
| 3702 | struct pmcraid_cmd *cmd, |
| 3703 | int buflen, |
| 3704 | int direction |
| 3705 | ) |
| 3706 | { |
| 3707 | struct pmcraid_sglist *sglist = cmd->sglist; |
| 3708 | |
| 3709 | if (buflen > 0) { |
| 3710 | pci_unmap_sg(cmd->drv_inst->pdev, |
| 3711 | sglist->scatterlist, |
| 3712 | sglist->num_sg, |
| 3713 | direction); |
| 3714 | pmcraid_free_sglist(sglist); |
| 3715 | cmd->sglist = NULL; |
| 3716 | } |
| 3717 | } |
| 3718 | |
| 3719 | /** |
| 3720 | * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands |
| 3721 | * |
| 3722 | * @pinstance: pointer to adapter instance structure |
| 3723 | * @cmd: ioctl code |
| 3724 | * @arg: pointer to pmcraid_passthrough_buffer user buffer |
| 3725 | * |
| 3726 | * Return value |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 3727 | * 0 on success, non-zero error code on failure |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3728 | */ |
| 3729 | static long pmcraid_ioctl_passthrough( |
| 3730 | struct pmcraid_instance *pinstance, |
| 3731 | unsigned int ioctl_cmd, |
| 3732 | unsigned int buflen, |
| 3733 | unsigned long arg |
| 3734 | ) |
| 3735 | { |
| 3736 | struct pmcraid_passthrough_ioctl_buffer *buffer; |
| 3737 | struct pmcraid_ioarcb *ioarcb; |
| 3738 | struct pmcraid_cmd *cmd; |
| 3739 | struct pmcraid_cmd *cancel_cmd; |
| 3740 | unsigned long request_buffer; |
| 3741 | unsigned long request_offset; |
| 3742 | unsigned long lock_flags; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3743 | u32 ioasc; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3744 | int request_size; |
| 3745 | int buffer_size; |
| 3746 | u8 access, direction; |
| 3747 | int rc = 0; |
| 3748 | |
| 3749 | /* If IOA reset is in progress, wait 10 secs for reset to complete */ |
| 3750 | if (pinstance->ioa_reset_in_progress) { |
| 3751 | rc = wait_event_interruptible_timeout( |
| 3752 | pinstance->reset_wait_q, |
| 3753 | !pinstance->ioa_reset_in_progress, |
| 3754 | msecs_to_jiffies(10000)); |
| 3755 | |
| 3756 | if (!rc) |
| 3757 | return -ETIMEDOUT; |
| 3758 | else if (rc < 0) |
| 3759 | return -ERESTARTSYS; |
| 3760 | } |
| 3761 | |
| 3762 | /* If adapter is not in operational state, return error */ |
| 3763 | if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) { |
| 3764 | pmcraid_err("IOA is not operational\n"); |
| 3765 | return -ENOTTY; |
| 3766 | } |
| 3767 | |
| 3768 | buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer); |
| 3769 | buffer = kmalloc(buffer_size, GFP_KERNEL); |
| 3770 | |
| 3771 | if (!buffer) { |
| 3772 | pmcraid_err("no memory for passthrough buffer\n"); |
| 3773 | return -ENOMEM; |
| 3774 | } |
| 3775 | |
| 3776 | request_offset = |
| 3777 | offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer); |
| 3778 | |
| 3779 | request_buffer = arg + request_offset; |
| 3780 | |
| 3781 | rc = __copy_from_user(buffer, |
| 3782 | (struct pmcraid_passthrough_ioctl_buffer *) arg, |
| 3783 | sizeof(struct pmcraid_passthrough_ioctl_buffer)); |
| 3784 | if (rc) { |
| 3785 | pmcraid_err("ioctl: can't copy passthrough buffer\n"); |
| 3786 | rc = -EFAULT; |
| 3787 | goto out_free_buffer; |
| 3788 | } |
| 3789 | |
| 3790 | request_size = buffer->ioarcb.data_transfer_length; |
| 3791 | |
| 3792 | if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) { |
| 3793 | access = VERIFY_READ; |
| 3794 | direction = DMA_TO_DEVICE; |
| 3795 | } else { |
| 3796 | access = VERIFY_WRITE; |
| 3797 | direction = DMA_FROM_DEVICE; |
| 3798 | } |
| 3799 | |
| 3800 | if (request_size > 0) { |
| 3801 | rc = access_ok(access, arg, request_offset + request_size); |
| 3802 | |
| 3803 | if (!rc) { |
| 3804 | rc = -EFAULT; |
| 3805 | goto out_free_buffer; |
| 3806 | } |
| 3807 | } |
| 3808 | |
| 3809 | /* check if we have any additional command parameters */ |
| 3810 | if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) { |
| 3811 | rc = -EINVAL; |
| 3812 | goto out_free_buffer; |
| 3813 | } |
| 3814 | |
| 3815 | cmd = pmcraid_get_free_cmd(pinstance); |
| 3816 | |
| 3817 | if (!cmd) { |
| 3818 | pmcraid_err("free command block is not available\n"); |
| 3819 | rc = -ENOMEM; |
| 3820 | goto out_free_buffer; |
| 3821 | } |
| 3822 | |
| 3823 | cmd->scsi_cmd = NULL; |
| 3824 | ioarcb = &(cmd->ioa_cb->ioarcb); |
| 3825 | |
| 3826 | /* Copy the user-provided IOARCB stuff field by field */ |
| 3827 | ioarcb->resource_handle = buffer->ioarcb.resource_handle; |
| 3828 | ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length; |
| 3829 | ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout; |
| 3830 | ioarcb->request_type = buffer->ioarcb.request_type; |
| 3831 | ioarcb->request_flags0 = buffer->ioarcb.request_flags0; |
| 3832 | ioarcb->request_flags1 = buffer->ioarcb.request_flags1; |
| 3833 | memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN); |
| 3834 | |
| 3835 | if (buffer->ioarcb.add_cmd_param_length) { |
| 3836 | ioarcb->add_cmd_param_length = |
| 3837 | buffer->ioarcb.add_cmd_param_length; |
| 3838 | ioarcb->add_cmd_param_offset = |
| 3839 | buffer->ioarcb.add_cmd_param_offset; |
| 3840 | memcpy(ioarcb->add_data.u.add_cmd_params, |
| 3841 | buffer->ioarcb.add_data.u.add_cmd_params, |
| 3842 | buffer->ioarcb.add_cmd_param_length); |
| 3843 | } |
| 3844 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3845 | /* set hrrq number where the IOA should respond to. Note that all cmds |
| 3846 | * generated internally uses hrrq_id 0, exception to this is the cmd |
| 3847 | * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses |
| 3848 | * hrrq_id assigned here in queuecommand |
| 3849 | */ |
| 3850 | ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) % |
| 3851 | pinstance->num_hrrq; |
| 3852 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3853 | if (request_size) { |
| 3854 | rc = pmcraid_build_passthrough_ioadls(cmd, |
| 3855 | request_size, |
| 3856 | direction); |
| 3857 | if (rc) { |
| 3858 | pmcraid_err("couldn't build passthrough ioadls\n"); |
| 3859 | goto out_free_buffer; |
| 3860 | } |
| 3861 | } |
| 3862 | |
| 3863 | /* If data is being written into the device, copy the data from user |
| 3864 | * buffers |
| 3865 | */ |
| 3866 | if (direction == DMA_TO_DEVICE && request_size > 0) { |
| 3867 | rc = pmcraid_copy_sglist(cmd->sglist, |
| 3868 | request_buffer, |
| 3869 | request_size, |
| 3870 | direction); |
| 3871 | if (rc) { |
| 3872 | pmcraid_err("failed to copy user buffer\n"); |
| 3873 | goto out_free_sglist; |
| 3874 | } |
| 3875 | } |
| 3876 | |
| 3877 | /* passthrough ioctl is a blocking command so, put the user to sleep |
| 3878 | * until timeout. Note that a timeout value of 0 means, do timeout. |
| 3879 | */ |
| 3880 | cmd->cmd_done = pmcraid_internal_done; |
| 3881 | init_completion(&cmd->wait_for_completion); |
| 3882 | cmd->completion_req = 1; |
| 3883 | |
| 3884 | pmcraid_info("command(%d) (CDB[0] = %x) for %x\n", |
| 3885 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2, |
| 3886 | cmd->ioa_cb->ioarcb.cdb[0], |
| 3887 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle)); |
| 3888 | |
| 3889 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 3890 | _pmcraid_fire_command(cmd); |
| 3891 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 3892 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3893 | /* NOTE ! Remove the below line once abort_task is implemented |
| 3894 | * in firmware. This line disables ioctl command timeout handling logic |
| 3895 | * similar to IO command timeout handling, making ioctl commands to wait |
| 3896 | * until the command completion regardless of timeout value specified in |
| 3897 | * ioarcb |
| 3898 | */ |
| 3899 | buffer->ioarcb.cmd_timeout = 0; |
| 3900 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3901 | /* If command timeout is specified put caller to wait till that time, |
| 3902 | * otherwise it would be blocking wait. If command gets timed out, it |
| 3903 | * will be aborted. |
| 3904 | */ |
| 3905 | if (buffer->ioarcb.cmd_timeout == 0) { |
| 3906 | wait_for_completion(&cmd->wait_for_completion); |
| 3907 | } else if (!wait_for_completion_timeout( |
| 3908 | &cmd->wait_for_completion, |
| 3909 | msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) { |
| 3910 | |
| 3911 | pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n", |
| 3912 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2), |
| 3913 | cmd->ioa_cb->ioarcb.cdb[0]); |
| 3914 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3915 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| 3916 | cancel_cmd = pmcraid_abort_cmd(cmd); |
| 3917 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| 3918 | |
| 3919 | if (cancel_cmd) { |
| 3920 | wait_for_completion(&cancel_cmd->wait_for_completion); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3921 | ioasc = cancel_cmd->ioa_cb->ioasa.ioasc; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3922 | pmcraid_return_cmd(cancel_cmd); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3923 | |
| 3924 | /* if abort task couldn't find the command i.e it got |
| 3925 | * completed prior to aborting, return good completion. |
| 3926 | * if command got aborted succesfully or there was IOA |
| 3927 | * reset due to abort task itself getting timedout then |
| 3928 | * return -ETIMEDOUT |
| 3929 | */ |
| 3930 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
| 3931 | PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) { |
| 3932 | if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND) |
| 3933 | rc = -ETIMEDOUT; |
| 3934 | goto out_handle_response; |
| 3935 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3936 | } |
| 3937 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3938 | /* no command block for abort task or abort task failed to abort |
| 3939 | * the IOARCB, then wait for 150 more seconds and initiate reset |
| 3940 | * sequence after timeout |
| 3941 | */ |
| 3942 | if (!wait_for_completion_timeout( |
| 3943 | &cmd->wait_for_completion, |
| 3944 | msecs_to_jiffies(150 * 1000))) { |
| 3945 | pmcraid_reset_bringup(cmd->drv_inst); |
| 3946 | rc = -ETIMEDOUT; |
| 3947 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3948 | } |
| 3949 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3950 | out_handle_response: |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3951 | /* If the command failed for any reason, copy entire IOASA buffer and |
| 3952 | * return IOCTL success. If copying IOASA to user-buffer fails, return |
| 3953 | * EFAULT |
| 3954 | */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3955 | if (PMCRAID_IOASC_SENSE_KEY(le32_to_cpu(cmd->ioa_cb->ioasa.ioasc))) { |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3956 | void *ioasa = |
| 3957 | (void *)(arg + |
| 3958 | offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa)); |
| 3959 | |
| 3960 | pmcraid_info("command failed with %x\n", |
| 3961 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
| 3962 | if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa, |
| 3963 | sizeof(struct pmcraid_ioasa))) { |
| 3964 | pmcraid_err("failed to copy ioasa buffer to user\n"); |
| 3965 | rc = -EFAULT; |
| 3966 | } |
| 3967 | } |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 3968 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 3969 | /* If the data transfer was from device, copy the data onto user |
| 3970 | * buffers |
| 3971 | */ |
| 3972 | else if (direction == DMA_FROM_DEVICE && request_size > 0) { |
| 3973 | rc = pmcraid_copy_sglist(cmd->sglist, |
| 3974 | request_buffer, |
| 3975 | request_size, |
| 3976 | direction); |
| 3977 | if (rc) { |
| 3978 | pmcraid_err("failed to copy user buffer\n"); |
| 3979 | rc = -EFAULT; |
| 3980 | } |
| 3981 | } |
| 3982 | |
| 3983 | out_free_sglist: |
| 3984 | pmcraid_release_passthrough_ioadls(cmd, request_size, direction); |
| 3985 | pmcraid_return_cmd(cmd); |
| 3986 | |
| 3987 | out_free_buffer: |
| 3988 | kfree(buffer); |
| 3989 | |
| 3990 | return rc; |
| 3991 | } |
| 3992 | |
| 3993 | |
| 3994 | |
| 3995 | |
| 3996 | /** |
| 3997 | * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself |
| 3998 | * |
| 3999 | * @pinstance: pointer to adapter instance structure |
| 4000 | * @cmd: ioctl command passed in |
| 4001 | * @buflen: length of user_buffer |
| 4002 | * @user_buffer: user buffer pointer |
| 4003 | * |
| 4004 | * Return Value |
| 4005 | * 0 in case of success, otherwise appropriate error code |
| 4006 | */ |
| 4007 | static long pmcraid_ioctl_driver( |
| 4008 | struct pmcraid_instance *pinstance, |
| 4009 | unsigned int cmd, |
| 4010 | unsigned int buflen, |
| 4011 | void __user *user_buffer |
| 4012 | ) |
| 4013 | { |
| 4014 | int rc = -ENOSYS; |
| 4015 | |
| 4016 | if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4017 | pmcraid_err("ioctl_driver: access fault in request buffer\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4018 | return -EFAULT; |
| 4019 | } |
| 4020 | |
| 4021 | switch (cmd) { |
| 4022 | case PMCRAID_IOCTL_RESET_ADAPTER: |
| 4023 | pmcraid_reset_bringup(pinstance); |
| 4024 | rc = 0; |
| 4025 | break; |
| 4026 | |
| 4027 | default: |
| 4028 | break; |
| 4029 | } |
| 4030 | |
| 4031 | return rc; |
| 4032 | } |
| 4033 | |
| 4034 | /** |
| 4035 | * pmcraid_check_ioctl_buffer - check for proper access to user buffer |
| 4036 | * |
| 4037 | * @cmd: ioctl command |
| 4038 | * @arg: user buffer |
| 4039 | * @hdr: pointer to kernel memory for pmcraid_ioctl_header |
| 4040 | * |
| 4041 | * Return Value |
| 4042 | * negetive error code if there are access issues, otherwise zero. |
| 4043 | * Upon success, returns ioctl header copied out of user buffer. |
| 4044 | */ |
| 4045 | |
| 4046 | static int pmcraid_check_ioctl_buffer( |
| 4047 | int cmd, |
| 4048 | void __user *arg, |
| 4049 | struct pmcraid_ioctl_header *hdr |
| 4050 | ) |
| 4051 | { |
| 4052 | int rc = 0; |
| 4053 | int access = VERIFY_READ; |
| 4054 | |
| 4055 | if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) { |
| 4056 | pmcraid_err("couldn't copy ioctl header from user buffer\n"); |
| 4057 | return -EFAULT; |
| 4058 | } |
| 4059 | |
| 4060 | /* check for valid driver signature */ |
| 4061 | rc = memcmp(hdr->signature, |
| 4062 | PMCRAID_IOCTL_SIGNATURE, |
| 4063 | sizeof(hdr->signature)); |
| 4064 | if (rc) { |
| 4065 | pmcraid_err("signature verification failed\n"); |
| 4066 | return -EINVAL; |
| 4067 | } |
| 4068 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4069 | /* check for appropriate buffer access */ |
| 4070 | if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ) |
| 4071 | access = VERIFY_WRITE; |
| 4072 | |
| 4073 | rc = access_ok(access, |
| 4074 | (arg + sizeof(struct pmcraid_ioctl_header)), |
| 4075 | hdr->buffer_length); |
| 4076 | if (!rc) { |
| 4077 | pmcraid_err("access failed for user buffer of size %d\n", |
| 4078 | hdr->buffer_length); |
| 4079 | return -EFAULT; |
| 4080 | } |
| 4081 | |
| 4082 | return 0; |
| 4083 | } |
| 4084 | |
| 4085 | /** |
| 4086 | * pmcraid_ioctl - char node ioctl entry point |
| 4087 | */ |
| 4088 | static long pmcraid_chr_ioctl( |
| 4089 | struct file *filep, |
| 4090 | unsigned int cmd, |
| 4091 | unsigned long arg |
| 4092 | ) |
| 4093 | { |
| 4094 | struct pmcraid_instance *pinstance = NULL; |
| 4095 | struct pmcraid_ioctl_header *hdr = NULL; |
| 4096 | int retval = -ENOTTY; |
| 4097 | |
| 4098 | hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header)); |
| 4099 | |
| 4100 | if (!hdr) { |
| 4101 | pmcraid_err("faile to allocate memory for ioctl header\n"); |
| 4102 | return -ENOMEM; |
| 4103 | } |
| 4104 | |
| 4105 | retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr); |
| 4106 | |
| 4107 | if (retval) { |
| 4108 | pmcraid_info("chr_ioctl: header check failed\n"); |
| 4109 | kfree(hdr); |
| 4110 | return retval; |
| 4111 | } |
| 4112 | |
| 4113 | pinstance = (struct pmcraid_instance *)filep->private_data; |
| 4114 | |
| 4115 | if (!pinstance) { |
| 4116 | pmcraid_info("adapter instance is not found\n"); |
| 4117 | kfree(hdr); |
| 4118 | return -ENOTTY; |
| 4119 | } |
| 4120 | |
| 4121 | switch (_IOC_TYPE(cmd)) { |
| 4122 | |
| 4123 | case PMCRAID_PASSTHROUGH_IOCTL: |
| 4124 | /* If ioctl code is to download microcode, we need to block |
| 4125 | * mid-layer requests. |
| 4126 | */ |
| 4127 | if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE) |
| 4128 | scsi_block_requests(pinstance->host); |
| 4129 | |
| 4130 | retval = pmcraid_ioctl_passthrough(pinstance, |
| 4131 | cmd, |
| 4132 | hdr->buffer_length, |
| 4133 | arg); |
| 4134 | |
| 4135 | if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE) |
| 4136 | scsi_unblock_requests(pinstance->host); |
| 4137 | break; |
| 4138 | |
| 4139 | case PMCRAID_DRIVER_IOCTL: |
| 4140 | arg += sizeof(struct pmcraid_ioctl_header); |
| 4141 | retval = pmcraid_ioctl_driver(pinstance, |
| 4142 | cmd, |
| 4143 | hdr->buffer_length, |
| 4144 | (void __user *)arg); |
| 4145 | break; |
| 4146 | |
| 4147 | default: |
| 4148 | retval = -ENOTTY; |
| 4149 | break; |
| 4150 | } |
| 4151 | |
| 4152 | kfree(hdr); |
| 4153 | |
| 4154 | return retval; |
| 4155 | } |
| 4156 | |
| 4157 | /** |
| 4158 | * File operations structure for management interface |
| 4159 | */ |
| 4160 | static const struct file_operations pmcraid_fops = { |
| 4161 | .owner = THIS_MODULE, |
| 4162 | .open = pmcraid_chr_open, |
| 4163 | .release = pmcraid_chr_release, |
| 4164 | .fasync = pmcraid_chr_fasync, |
| 4165 | .unlocked_ioctl = pmcraid_chr_ioctl, |
| 4166 | #ifdef CONFIG_COMPAT |
| 4167 | .compat_ioctl = pmcraid_chr_ioctl, |
| 4168 | #endif |
| 4169 | }; |
| 4170 | |
| 4171 | |
| 4172 | |
| 4173 | |
| 4174 | /** |
| 4175 | * pmcraid_show_log_level - Display adapter's error logging level |
| 4176 | * @dev: class device struct |
| 4177 | * @buf: buffer |
| 4178 | * |
| 4179 | * Return value: |
| 4180 | * number of bytes printed to buffer |
| 4181 | */ |
| 4182 | static ssize_t pmcraid_show_log_level( |
| 4183 | struct device *dev, |
| 4184 | struct device_attribute *attr, |
| 4185 | char *buf) |
| 4186 | { |
| 4187 | struct Scsi_Host *shost = class_to_shost(dev); |
| 4188 | struct pmcraid_instance *pinstance = |
| 4189 | (struct pmcraid_instance *)shost->hostdata; |
| 4190 | return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level); |
| 4191 | } |
| 4192 | |
| 4193 | /** |
| 4194 | * pmcraid_store_log_level - Change the adapter's error logging level |
| 4195 | * @dev: class device struct |
| 4196 | * @buf: buffer |
| 4197 | * @count: not used |
| 4198 | * |
| 4199 | * Return value: |
| 4200 | * number of bytes printed to buffer |
| 4201 | */ |
| 4202 | static ssize_t pmcraid_store_log_level( |
| 4203 | struct device *dev, |
| 4204 | struct device_attribute *attr, |
| 4205 | const char *buf, |
| 4206 | size_t count |
| 4207 | ) |
| 4208 | { |
| 4209 | struct Scsi_Host *shost; |
| 4210 | struct pmcraid_instance *pinstance; |
| 4211 | unsigned long val; |
| 4212 | |
| 4213 | if (strict_strtoul(buf, 10, &val)) |
| 4214 | return -EINVAL; |
| 4215 | /* log-level should be from 0 to 2 */ |
| 4216 | if (val > 2) |
| 4217 | return -EINVAL; |
| 4218 | |
| 4219 | shost = class_to_shost(dev); |
| 4220 | pinstance = (struct pmcraid_instance *)shost->hostdata; |
| 4221 | pinstance->current_log_level = val; |
| 4222 | |
| 4223 | return strlen(buf); |
| 4224 | } |
| 4225 | |
| 4226 | static struct device_attribute pmcraid_log_level_attr = { |
| 4227 | .attr = { |
| 4228 | .name = "log_level", |
| 4229 | .mode = S_IRUGO | S_IWUSR, |
| 4230 | }, |
| 4231 | .show = pmcraid_show_log_level, |
| 4232 | .store = pmcraid_store_log_level, |
| 4233 | }; |
| 4234 | |
| 4235 | /** |
| 4236 | * pmcraid_show_drv_version - Display driver version |
| 4237 | * @dev: class device struct |
| 4238 | * @buf: buffer |
| 4239 | * |
| 4240 | * Return value: |
| 4241 | * number of bytes printed to buffer |
| 4242 | */ |
| 4243 | static ssize_t pmcraid_show_drv_version( |
| 4244 | struct device *dev, |
| 4245 | struct device_attribute *attr, |
| 4246 | char *buf |
| 4247 | ) |
| 4248 | { |
| 4249 | return snprintf(buf, PAGE_SIZE, "version: %s, build date: %s\n", |
| 4250 | PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE); |
| 4251 | } |
| 4252 | |
| 4253 | static struct device_attribute pmcraid_driver_version_attr = { |
| 4254 | .attr = { |
| 4255 | .name = "drv_version", |
| 4256 | .mode = S_IRUGO, |
| 4257 | }, |
| 4258 | .show = pmcraid_show_drv_version, |
| 4259 | }; |
| 4260 | |
| 4261 | /** |
| 4262 | * pmcraid_show_io_adapter_id - Display driver assigned adapter id |
| 4263 | * @dev: class device struct |
| 4264 | * @buf: buffer |
| 4265 | * |
| 4266 | * Return value: |
| 4267 | * number of bytes printed to buffer |
| 4268 | */ |
| 4269 | static ssize_t pmcraid_show_adapter_id( |
| 4270 | struct device *dev, |
| 4271 | struct device_attribute *attr, |
| 4272 | char *buf |
| 4273 | ) |
| 4274 | { |
| 4275 | struct Scsi_Host *shost = class_to_shost(dev); |
| 4276 | struct pmcraid_instance *pinstance = |
| 4277 | (struct pmcraid_instance *)shost->hostdata; |
| 4278 | u32 adapter_id = (pinstance->pdev->bus->number << 8) | |
| 4279 | pinstance->pdev->devfn; |
| 4280 | u32 aen_group = pmcraid_event_family.id; |
| 4281 | |
| 4282 | return snprintf(buf, PAGE_SIZE, |
| 4283 | "adapter id: %d\nminor: %d\naen group: %d\n", |
| 4284 | adapter_id, MINOR(pinstance->cdev.dev), aen_group); |
| 4285 | } |
| 4286 | |
| 4287 | static struct device_attribute pmcraid_adapter_id_attr = { |
| 4288 | .attr = { |
| 4289 | .name = "adapter_id", |
| 4290 | .mode = S_IRUGO | S_IWUSR, |
| 4291 | }, |
| 4292 | .show = pmcraid_show_adapter_id, |
| 4293 | }; |
| 4294 | |
| 4295 | static struct device_attribute *pmcraid_host_attrs[] = { |
| 4296 | &pmcraid_log_level_attr, |
| 4297 | &pmcraid_driver_version_attr, |
| 4298 | &pmcraid_adapter_id_attr, |
| 4299 | NULL, |
| 4300 | }; |
| 4301 | |
| 4302 | |
| 4303 | /* host template structure for pmcraid driver */ |
| 4304 | static struct scsi_host_template pmcraid_host_template = { |
| 4305 | .module = THIS_MODULE, |
| 4306 | .name = PMCRAID_DRIVER_NAME, |
| 4307 | .queuecommand = pmcraid_queuecommand, |
| 4308 | .eh_abort_handler = pmcraid_eh_abort_handler, |
| 4309 | .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler, |
| 4310 | .eh_target_reset_handler = pmcraid_eh_target_reset_handler, |
| 4311 | .eh_device_reset_handler = pmcraid_eh_device_reset_handler, |
| 4312 | .eh_host_reset_handler = pmcraid_eh_host_reset_handler, |
| 4313 | |
| 4314 | .slave_alloc = pmcraid_slave_alloc, |
| 4315 | .slave_configure = pmcraid_slave_configure, |
| 4316 | .slave_destroy = pmcraid_slave_destroy, |
| 4317 | .change_queue_depth = pmcraid_change_queue_depth, |
| 4318 | .change_queue_type = pmcraid_change_queue_type, |
| 4319 | .can_queue = PMCRAID_MAX_IO_CMD, |
| 4320 | .this_id = -1, |
| 4321 | .sg_tablesize = PMCRAID_MAX_IOADLS, |
| 4322 | .max_sectors = PMCRAID_IOA_MAX_SECTORS, |
| 4323 | .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN, |
| 4324 | .use_clustering = ENABLE_CLUSTERING, |
| 4325 | .shost_attrs = pmcraid_host_attrs, |
| 4326 | .proc_name = PMCRAID_DRIVER_NAME |
| 4327 | }; |
| 4328 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4329 | /* |
| 4330 | * pmcraid_isr_msix - implements MSI-X interrupt handling routine |
| 4331 | * @irq: interrupt vector number |
| 4332 | * @dev_id: pointer hrrq_vector |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4333 | * |
| 4334 | * Return Value |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4335 | * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4336 | */ |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4337 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4338 | static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id) |
| 4339 | { |
| 4340 | struct pmcraid_isr_param *hrrq_vector; |
| 4341 | struct pmcraid_instance *pinstance; |
| 4342 | unsigned long lock_flags; |
| 4343 | u32 intrs_val; |
| 4344 | int hrrq_id; |
| 4345 | |
| 4346 | hrrq_vector = (struct pmcraid_isr_param *)dev_id; |
| 4347 | hrrq_id = hrrq_vector->hrrq_id; |
| 4348 | pinstance = hrrq_vector->drv_inst; |
| 4349 | |
| 4350 | if (!hrrq_id) { |
| 4351 | /* Read the interrupt */ |
| 4352 | intrs_val = pmcraid_read_interrupts(pinstance); |
| 4353 | if (intrs_val && |
| 4354 | ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg) |
| 4355 | & DOORBELL_INTR_MSIX_CLR) == 0)) { |
| 4356 | /* Any error interrupts including unit_check, |
| 4357 | * initiate IOA reset.In case of unit check indicate |
| 4358 | * to reset_sequence that IOA unit checked and prepare |
| 4359 | * for a dump during reset sequence |
| 4360 | */ |
| 4361 | if (intrs_val & PMCRAID_ERROR_INTERRUPTS) { |
| 4362 | if (intrs_val & INTRS_IOA_UNIT_CHECK) |
| 4363 | pinstance->ioa_unit_check = 1; |
| 4364 | |
| 4365 | pmcraid_err("ISR: error interrupts: %x \ |
| 4366 | initiating reset\n", intrs_val); |
| 4367 | spin_lock_irqsave(pinstance->host->host_lock, |
| 4368 | lock_flags); |
| 4369 | pmcraid_initiate_reset(pinstance); |
| 4370 | spin_unlock_irqrestore( |
| 4371 | pinstance->host->host_lock, |
| 4372 | lock_flags); |
| 4373 | } |
| 4374 | /* If interrupt was as part of the ioa initialization, |
| 4375 | * clear it. Delete the timer and wakeup the |
| 4376 | * reset engine to proceed with reset sequence |
| 4377 | */ |
| 4378 | if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL) |
| 4379 | pmcraid_clr_trans_op(pinstance); |
| 4380 | |
| 4381 | /* Clear the interrupt register by writing |
| 4382 | * to host to ioa doorbell. Once done |
| 4383 | * FW will clear the interrupt. |
| 4384 | */ |
| 4385 | iowrite32(DOORBELL_INTR_MSIX_CLR, |
| 4386 | pinstance->int_regs.host_ioa_interrupt_reg); |
| 4387 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
| 4388 | |
| 4389 | |
| 4390 | } |
| 4391 | } |
| 4392 | |
| 4393 | tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id])); |
| 4394 | |
| 4395 | return IRQ_HANDLED; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4396 | } |
| 4397 | |
| 4398 | /** |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4399 | * pmcraid_isr - implements legacy interrupt handling routine |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4400 | * |
| 4401 | * @irq: interrupt vector number |
| 4402 | * @dev_id: pointer hrrq_vector |
| 4403 | * |
| 4404 | * Return Value |
| 4405 | * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored |
| 4406 | */ |
| 4407 | static irqreturn_t pmcraid_isr(int irq, void *dev_id) |
| 4408 | { |
| 4409 | struct pmcraid_isr_param *hrrq_vector; |
| 4410 | struct pmcraid_instance *pinstance; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4411 | u32 intrs; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4412 | unsigned long lock_flags; |
| 4413 | int hrrq_id = 0; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4414 | |
| 4415 | /* In case of legacy interrupt mode where interrupts are shared across |
| 4416 | * isrs, it may be possible that the current interrupt is not from IOA |
| 4417 | */ |
| 4418 | if (!dev_id) { |
| 4419 | printk(KERN_INFO "%s(): NULL host pointer\n", __func__); |
| 4420 | return IRQ_NONE; |
| 4421 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4422 | hrrq_vector = (struct pmcraid_isr_param *)dev_id; |
| 4423 | pinstance = hrrq_vector->drv_inst; |
| 4424 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4425 | intrs = pmcraid_read_interrupts(pinstance); |
| 4426 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4427 | if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0)) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4428 | return IRQ_NONE; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4429 | |
| 4430 | /* Any error interrupts including unit_check, initiate IOA reset. |
| 4431 | * In case of unit check indicate to reset_sequence that IOA unit |
| 4432 | * checked and prepare for a dump during reset sequence |
| 4433 | */ |
| 4434 | if (intrs & PMCRAID_ERROR_INTERRUPTS) { |
| 4435 | |
| 4436 | if (intrs & INTRS_IOA_UNIT_CHECK) |
| 4437 | pinstance->ioa_unit_check = 1; |
| 4438 | |
| 4439 | iowrite32(intrs, |
| 4440 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
| 4441 | pmcraid_err("ISR: error interrupts: %x initiating reset\n", |
| 4442 | intrs); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4443 | intrs = ioread32( |
| 4444 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
| 4445 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4446 | pmcraid_initiate_reset(pinstance); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4447 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4448 | } else { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4449 | /* If interrupt was as part of the ioa initialization, |
| 4450 | * clear. Delete the timer and wakeup the |
| 4451 | * reset engine to proceed with reset sequence |
| 4452 | */ |
| 4453 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) { |
| 4454 | pmcraid_clr_trans_op(pinstance); |
| 4455 | } else { |
| 4456 | iowrite32(intrs, |
| 4457 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
| 4458 | ioread32( |
| 4459 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4460 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4461 | tasklet_schedule( |
| 4462 | &(pinstance->isr_tasklet[hrrq_id])); |
| 4463 | } |
| 4464 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4465 | |
| 4466 | return IRQ_HANDLED; |
| 4467 | } |
| 4468 | |
| 4469 | |
| 4470 | /** |
| 4471 | * pmcraid_worker_function - worker thread function |
| 4472 | * |
| 4473 | * @workp: pointer to struct work queue |
| 4474 | * |
| 4475 | * Return Value |
| 4476 | * None |
| 4477 | */ |
| 4478 | |
| 4479 | static void pmcraid_worker_function(struct work_struct *workp) |
| 4480 | { |
| 4481 | struct pmcraid_instance *pinstance; |
| 4482 | struct pmcraid_resource_entry *res; |
| 4483 | struct pmcraid_resource_entry *temp; |
| 4484 | struct scsi_device *sdev; |
| 4485 | unsigned long lock_flags; |
| 4486 | unsigned long host_lock_flags; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4487 | u16 fw_version; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4488 | u8 bus, target, lun; |
| 4489 | |
| 4490 | pinstance = container_of(workp, struct pmcraid_instance, worker_q); |
| 4491 | /* add resources only after host is added into system */ |
| 4492 | if (!atomic_read(&pinstance->expose_resources)) |
| 4493 | return; |
| 4494 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4495 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
| 4496 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4497 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
| 4498 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) { |
| 4499 | |
| 4500 | if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) { |
| 4501 | sdev = res->scsi_dev; |
| 4502 | |
| 4503 | /* host_lock must be held before calling |
| 4504 | * scsi_device_get |
| 4505 | */ |
| 4506 | spin_lock_irqsave(pinstance->host->host_lock, |
| 4507 | host_lock_flags); |
| 4508 | if (!scsi_device_get(sdev)) { |
| 4509 | spin_unlock_irqrestore( |
| 4510 | pinstance->host->host_lock, |
| 4511 | host_lock_flags); |
| 4512 | pmcraid_info("deleting %x from midlayer\n", |
| 4513 | res->cfg_entry.resource_address); |
| 4514 | list_move_tail(&res->queue, |
| 4515 | &pinstance->free_res_q); |
| 4516 | spin_unlock_irqrestore( |
| 4517 | &pinstance->resource_lock, |
| 4518 | lock_flags); |
| 4519 | scsi_remove_device(sdev); |
| 4520 | scsi_device_put(sdev); |
| 4521 | spin_lock_irqsave(&pinstance->resource_lock, |
| 4522 | lock_flags); |
| 4523 | res->change_detected = 0; |
| 4524 | } else { |
| 4525 | spin_unlock_irqrestore( |
| 4526 | pinstance->host->host_lock, |
| 4527 | host_lock_flags); |
| 4528 | } |
| 4529 | } |
| 4530 | } |
| 4531 | |
| 4532 | list_for_each_entry(res, &pinstance->used_res_q, queue) { |
| 4533 | |
| 4534 | if (res->change_detected == RES_CHANGE_ADD) { |
| 4535 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4536 | if (!pmcraid_expose_resource(fw_version, |
| 4537 | &res->cfg_entry)) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4538 | continue; |
| 4539 | |
| 4540 | if (RES_IS_VSET(res->cfg_entry)) { |
| 4541 | bus = PMCRAID_VSET_BUS_ID; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4542 | if (fw_version <= PMCRAID_FW_VERSION_1) |
| 4543 | target = res->cfg_entry.unique_flags1; |
| 4544 | else |
| 4545 | target = res->cfg_entry.array_id & 0xFF; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4546 | lun = PMCRAID_VSET_LUN_ID; |
| 4547 | } else { |
| 4548 | bus = PMCRAID_PHYS_BUS_ID; |
| 4549 | target = |
| 4550 | RES_TARGET( |
| 4551 | res->cfg_entry.resource_address); |
| 4552 | lun = RES_LUN(res->cfg_entry.resource_address); |
| 4553 | } |
| 4554 | |
| 4555 | res->change_detected = 0; |
| 4556 | spin_unlock_irqrestore(&pinstance->resource_lock, |
| 4557 | lock_flags); |
| 4558 | scsi_add_device(pinstance->host, bus, target, lun); |
| 4559 | spin_lock_irqsave(&pinstance->resource_lock, |
| 4560 | lock_flags); |
| 4561 | } |
| 4562 | } |
| 4563 | |
| 4564 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
| 4565 | } |
| 4566 | |
| 4567 | /** |
| 4568 | * pmcraid_tasklet_function - Tasklet function |
| 4569 | * |
| 4570 | * @instance: pointer to msix param structure |
| 4571 | * |
| 4572 | * Return Value |
| 4573 | * None |
| 4574 | */ |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4575 | static void pmcraid_tasklet_function(unsigned long instance) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4576 | { |
| 4577 | struct pmcraid_isr_param *hrrq_vector; |
| 4578 | struct pmcraid_instance *pinstance; |
| 4579 | unsigned long hrrq_lock_flags; |
| 4580 | unsigned long pending_lock_flags; |
| 4581 | unsigned long host_lock_flags; |
| 4582 | spinlock_t *lockp; /* hrrq buffer lock */ |
| 4583 | int id; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4584 | __le32 resp; |
| 4585 | |
| 4586 | hrrq_vector = (struct pmcraid_isr_param *)instance; |
| 4587 | pinstance = hrrq_vector->drv_inst; |
| 4588 | id = hrrq_vector->hrrq_id; |
| 4589 | lockp = &(pinstance->hrrq_lock[id]); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4590 | |
| 4591 | /* loop through each of the commands responded by IOA. Each HRRQ buf is |
| 4592 | * protected by its own lock. Traversals must be done within this lock |
| 4593 | * as there may be multiple tasklets running on multiple CPUs. Note |
| 4594 | * that the lock is held just for picking up the response handle and |
| 4595 | * manipulating hrrq_curr/toggle_bit values. |
| 4596 | */ |
| 4597 | spin_lock_irqsave(lockp, hrrq_lock_flags); |
| 4598 | |
| 4599 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); |
| 4600 | |
| 4601 | while ((resp & HRRQ_TOGGLE_BIT) == |
| 4602 | pinstance->host_toggle_bit[id]) { |
| 4603 | |
| 4604 | int cmd_index = resp >> 2; |
| 4605 | struct pmcraid_cmd *cmd = NULL; |
| 4606 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4607 | if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) { |
| 4608 | pinstance->hrrq_curr[id]++; |
| 4609 | } else { |
| 4610 | pinstance->hrrq_curr[id] = pinstance->hrrq_start[id]; |
| 4611 | pinstance->host_toggle_bit[id] ^= 1u; |
| 4612 | } |
| 4613 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4614 | if (cmd_index >= PMCRAID_MAX_CMD) { |
| 4615 | /* In case of invalid response handle, log message */ |
| 4616 | pmcraid_err("Invalid response handle %d\n", cmd_index); |
| 4617 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); |
| 4618 | continue; |
| 4619 | } |
| 4620 | |
| 4621 | cmd = pinstance->cmd_list[cmd_index]; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4622 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); |
| 4623 | |
| 4624 | spin_lock_irqsave(&pinstance->pending_pool_lock, |
| 4625 | pending_lock_flags); |
| 4626 | list_del(&cmd->free_list); |
| 4627 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
| 4628 | pending_lock_flags); |
| 4629 | del_timer(&cmd->timer); |
| 4630 | atomic_dec(&pinstance->outstanding_cmds); |
| 4631 | |
| 4632 | if (cmd->cmd_done == pmcraid_ioa_reset) { |
| 4633 | spin_lock_irqsave(pinstance->host->host_lock, |
| 4634 | host_lock_flags); |
| 4635 | cmd->cmd_done(cmd); |
| 4636 | spin_unlock_irqrestore(pinstance->host->host_lock, |
| 4637 | host_lock_flags); |
| 4638 | } else if (cmd->cmd_done != NULL) { |
| 4639 | cmd->cmd_done(cmd); |
| 4640 | } |
| 4641 | /* loop over until we are done with all responses */ |
| 4642 | spin_lock_irqsave(lockp, hrrq_lock_flags); |
| 4643 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); |
| 4644 | } |
| 4645 | |
| 4646 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); |
| 4647 | } |
| 4648 | |
| 4649 | /** |
| 4650 | * pmcraid_unregister_interrupt_handler - de-register interrupts handlers |
| 4651 | * @pinstance: pointer to adapter instance structure |
| 4652 | * |
| 4653 | * This routine un-registers registered interrupt handler and |
| 4654 | * also frees irqs/vectors. |
| 4655 | * |
| 4656 | * Retun Value |
| 4657 | * None |
| 4658 | */ |
| 4659 | static |
| 4660 | void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance) |
| 4661 | { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4662 | int i; |
| 4663 | |
| 4664 | for (i = 0; i < pinstance->num_hrrq; i++) |
| 4665 | free_irq(pinstance->hrrq_vector[i].vector, |
| 4666 | &(pinstance->hrrq_vector[i])); |
| 4667 | |
| 4668 | if (pinstance->interrupt_mode) { |
| 4669 | pci_disable_msix(pinstance->pdev); |
| 4670 | pinstance->interrupt_mode = 0; |
| 4671 | } |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4672 | } |
| 4673 | |
| 4674 | /** |
| 4675 | * pmcraid_register_interrupt_handler - registers interrupt handler |
| 4676 | * @pinstance: pointer to per-adapter instance structure |
| 4677 | * |
| 4678 | * Return Value |
| 4679 | * 0 on success, non-zero error code otherwise. |
| 4680 | */ |
| 4681 | static int |
| 4682 | pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance) |
| 4683 | { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4684 | int rc; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4685 | struct pci_dev *pdev = pinstance->pdev; |
| 4686 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4687 | if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) { |
| 4688 | int num_hrrq = PMCRAID_NUM_MSIX_VECTORS; |
| 4689 | struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS]; |
| 4690 | int i; |
| 4691 | for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++) |
| 4692 | entries[i].entry = i; |
| 4693 | |
| 4694 | rc = pci_enable_msix(pdev, entries, num_hrrq); |
| 4695 | if (rc < 0) |
| 4696 | goto pmcraid_isr_legacy; |
| 4697 | |
| 4698 | /* Check how many MSIX vectors are allocated and register |
| 4699 | * msi-x handlers for each of them giving appropriate buffer |
| 4700 | */ |
| 4701 | if (rc > 0) { |
| 4702 | num_hrrq = rc; |
| 4703 | if (pci_enable_msix(pdev, entries, num_hrrq)) |
| 4704 | goto pmcraid_isr_legacy; |
| 4705 | } |
| 4706 | |
| 4707 | for (i = 0; i < num_hrrq; i++) { |
| 4708 | pinstance->hrrq_vector[i].hrrq_id = i; |
| 4709 | pinstance->hrrq_vector[i].drv_inst = pinstance; |
| 4710 | pinstance->hrrq_vector[i].vector = entries[i].vector; |
| 4711 | rc = request_irq(pinstance->hrrq_vector[i].vector, |
| 4712 | pmcraid_isr_msix, 0, |
| 4713 | PMCRAID_DRIVER_NAME, |
| 4714 | &(pinstance->hrrq_vector[i])); |
| 4715 | |
| 4716 | if (rc) { |
| 4717 | int j; |
| 4718 | for (j = 0; j < i; j++) |
| 4719 | free_irq(entries[j].vector, |
| 4720 | &(pinstance->hrrq_vector[j])); |
| 4721 | pci_disable_msix(pdev); |
| 4722 | goto pmcraid_isr_legacy; |
| 4723 | } |
| 4724 | } |
| 4725 | |
| 4726 | pinstance->num_hrrq = num_hrrq; |
| 4727 | pinstance->interrupt_mode = 1; |
| 4728 | iowrite32(DOORBELL_INTR_MODE_MSIX, |
| 4729 | pinstance->int_regs.host_ioa_interrupt_reg); |
| 4730 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
| 4731 | goto pmcraid_isr_out; |
| 4732 | } |
| 4733 | |
| 4734 | pmcraid_isr_legacy: |
| 4735 | /* If MSI-X registration failed fallback to legacy mode, where |
| 4736 | * only one hrrq entry will be used |
| 4737 | */ |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4738 | pinstance->hrrq_vector[0].hrrq_id = 0; |
| 4739 | pinstance->hrrq_vector[0].drv_inst = pinstance; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4740 | pinstance->hrrq_vector[0].vector = pdev->irq; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4741 | pinstance->num_hrrq = 1; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4742 | rc = 0; |
| 4743 | |
| 4744 | rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED, |
| 4745 | PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]); |
| 4746 | pmcraid_isr_out: |
| 4747 | return rc; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4748 | } |
| 4749 | |
| 4750 | /** |
| 4751 | * pmcraid_release_cmd_blocks - release buufers allocated for command blocks |
| 4752 | * @pinstance: per adapter instance structure pointer |
| 4753 | * @max_index: number of buffer blocks to release |
| 4754 | * |
| 4755 | * Return Value |
| 4756 | * None |
| 4757 | */ |
| 4758 | static void |
| 4759 | pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index) |
| 4760 | { |
| 4761 | int i; |
| 4762 | for (i = 0; i < max_index; i++) { |
| 4763 | kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]); |
| 4764 | pinstance->cmd_list[i] = NULL; |
| 4765 | } |
| 4766 | kmem_cache_destroy(pinstance->cmd_cachep); |
| 4767 | pinstance->cmd_cachep = NULL; |
| 4768 | } |
| 4769 | |
| 4770 | /** |
| 4771 | * pmcraid_release_control_blocks - releases buffers alloced for control blocks |
| 4772 | * @pinstance: pointer to per adapter instance structure |
| 4773 | * @max_index: number of buffers (from 0 onwards) to release |
| 4774 | * |
| 4775 | * This function assumes that the command blocks for which control blocks are |
| 4776 | * linked are not released. |
| 4777 | * |
| 4778 | * Return Value |
| 4779 | * None |
| 4780 | */ |
| 4781 | static void |
| 4782 | pmcraid_release_control_blocks( |
| 4783 | struct pmcraid_instance *pinstance, |
| 4784 | int max_index |
| 4785 | ) |
| 4786 | { |
| 4787 | int i; |
| 4788 | |
| 4789 | if (pinstance->control_pool == NULL) |
| 4790 | return; |
| 4791 | |
| 4792 | for (i = 0; i < max_index; i++) { |
| 4793 | pci_pool_free(pinstance->control_pool, |
| 4794 | pinstance->cmd_list[i]->ioa_cb, |
| 4795 | pinstance->cmd_list[i]->ioa_cb_bus_addr); |
| 4796 | pinstance->cmd_list[i]->ioa_cb = NULL; |
| 4797 | pinstance->cmd_list[i]->ioa_cb_bus_addr = 0; |
| 4798 | } |
| 4799 | pci_pool_destroy(pinstance->control_pool); |
| 4800 | pinstance->control_pool = NULL; |
| 4801 | } |
| 4802 | |
| 4803 | /** |
| 4804 | * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures |
| 4805 | * @pinstance - pointer to per adapter instance structure |
| 4806 | * |
| 4807 | * Allocates memory for command blocks using kernel slab allocator. |
| 4808 | * |
| 4809 | * Return Value |
| 4810 | * 0 in case of success; -ENOMEM in case of failure |
| 4811 | */ |
| 4812 | static int __devinit |
| 4813 | pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance) |
| 4814 | { |
| 4815 | int i; |
| 4816 | |
| 4817 | sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d", |
| 4818 | pinstance->host->unique_id); |
| 4819 | |
| 4820 | |
| 4821 | pinstance->cmd_cachep = kmem_cache_create( |
| 4822 | pinstance->cmd_pool_name, |
| 4823 | sizeof(struct pmcraid_cmd), 0, |
| 4824 | SLAB_HWCACHE_ALIGN, NULL); |
| 4825 | if (!pinstance->cmd_cachep) |
| 4826 | return -ENOMEM; |
| 4827 | |
| 4828 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { |
| 4829 | pinstance->cmd_list[i] = |
| 4830 | kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL); |
| 4831 | if (!pinstance->cmd_list[i]) { |
| 4832 | pmcraid_release_cmd_blocks(pinstance, i); |
| 4833 | return -ENOMEM; |
| 4834 | } |
| 4835 | } |
| 4836 | return 0; |
| 4837 | } |
| 4838 | |
| 4839 | /** |
| 4840 | * pmcraid_allocate_control_blocks - allocates memory control blocks |
| 4841 | * @pinstance : pointer to per adapter instance structure |
| 4842 | * |
| 4843 | * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs |
| 4844 | * and IOASAs. This is called after command blocks are already allocated. |
| 4845 | * |
| 4846 | * Return Value |
| 4847 | * 0 in case it can allocate all control blocks, otherwise -ENOMEM |
| 4848 | */ |
| 4849 | static int __devinit |
| 4850 | pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance) |
| 4851 | { |
| 4852 | int i; |
| 4853 | |
| 4854 | sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d", |
| 4855 | pinstance->host->unique_id); |
| 4856 | |
| 4857 | pinstance->control_pool = |
| 4858 | pci_pool_create(pinstance->ctl_pool_name, |
| 4859 | pinstance->pdev, |
| 4860 | sizeof(struct pmcraid_control_block), |
| 4861 | PMCRAID_IOARCB_ALIGNMENT, 0); |
| 4862 | |
| 4863 | if (!pinstance->control_pool) |
| 4864 | return -ENOMEM; |
| 4865 | |
| 4866 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { |
| 4867 | pinstance->cmd_list[i]->ioa_cb = |
| 4868 | pci_pool_alloc( |
| 4869 | pinstance->control_pool, |
| 4870 | GFP_KERNEL, |
| 4871 | &(pinstance->cmd_list[i]->ioa_cb_bus_addr)); |
| 4872 | |
| 4873 | if (!pinstance->cmd_list[i]->ioa_cb) { |
| 4874 | pmcraid_release_control_blocks(pinstance, i); |
| 4875 | return -ENOMEM; |
| 4876 | } |
| 4877 | memset(pinstance->cmd_list[i]->ioa_cb, 0, |
| 4878 | sizeof(struct pmcraid_control_block)); |
| 4879 | } |
| 4880 | return 0; |
| 4881 | } |
| 4882 | |
| 4883 | /** |
| 4884 | * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s) |
| 4885 | * @pinstance: pointer to per adapter instance structure |
| 4886 | * @maxindex: size of hrrq buffer pointer array |
| 4887 | * |
| 4888 | * Return Value |
| 4889 | * None |
| 4890 | */ |
| 4891 | static void |
| 4892 | pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex) |
| 4893 | { |
| 4894 | int i; |
| 4895 | for (i = 0; i < maxindex; i++) { |
| 4896 | |
| 4897 | pci_free_consistent(pinstance->pdev, |
| 4898 | HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD, |
| 4899 | pinstance->hrrq_start[i], |
| 4900 | pinstance->hrrq_start_bus_addr[i]); |
| 4901 | |
| 4902 | /* reset pointers and toggle bit to zeros */ |
| 4903 | pinstance->hrrq_start[i] = NULL; |
| 4904 | pinstance->hrrq_start_bus_addr[i] = 0; |
| 4905 | pinstance->host_toggle_bit[i] = 0; |
| 4906 | } |
| 4907 | } |
| 4908 | |
| 4909 | /** |
| 4910 | * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers |
| 4911 | * @pinstance: pointer to per adapter instance structure |
| 4912 | * |
| 4913 | * Return value |
| 4914 | * 0 hrrq buffers are allocated, -ENOMEM otherwise. |
| 4915 | */ |
| 4916 | static int __devinit |
| 4917 | pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance) |
| 4918 | { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4919 | int i, buffer_size; |
| 4920 | |
| 4921 | buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4922 | |
| 4923 | for (i = 0; i < pinstance->num_hrrq; i++) { |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4924 | pinstance->hrrq_start[i] = |
| 4925 | pci_alloc_consistent( |
| 4926 | pinstance->pdev, |
| 4927 | buffer_size, |
| 4928 | &(pinstance->hrrq_start_bus_addr[i])); |
| 4929 | |
| 4930 | if (pinstance->hrrq_start[i] == 0) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4931 | pmcraid_err("pci_alloc failed for hrrq vector : %d\n", |
| 4932 | i); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4933 | pmcraid_release_host_rrqs(pinstance, i); |
| 4934 | return -ENOMEM; |
| 4935 | } |
| 4936 | |
| 4937 | memset(pinstance->hrrq_start[i], 0, buffer_size); |
| 4938 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i]; |
| 4939 | pinstance->hrrq_end[i] = |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4940 | pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4941 | pinstance->host_toggle_bit[i] = 1; |
| 4942 | spin_lock_init(&pinstance->hrrq_lock[i]); |
| 4943 | } |
| 4944 | return 0; |
| 4945 | } |
| 4946 | |
| 4947 | /** |
| 4948 | * pmcraid_release_hcams - release HCAM buffers |
| 4949 | * |
| 4950 | * @pinstance: pointer to per adapter instance structure |
| 4951 | * |
| 4952 | * Return value |
| 4953 | * none |
| 4954 | */ |
| 4955 | static void pmcraid_release_hcams(struct pmcraid_instance *pinstance) |
| 4956 | { |
| 4957 | if (pinstance->ccn.msg != NULL) { |
| 4958 | pci_free_consistent(pinstance->pdev, |
| 4959 | PMCRAID_AEN_HDR_SIZE + |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4960 | sizeof(struct pmcraid_hcam_ccn_ext), |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4961 | pinstance->ccn.msg, |
| 4962 | pinstance->ccn.baddr); |
| 4963 | |
| 4964 | pinstance->ccn.msg = NULL; |
| 4965 | pinstance->ccn.hcam = NULL; |
| 4966 | pinstance->ccn.baddr = 0; |
| 4967 | } |
| 4968 | |
| 4969 | if (pinstance->ldn.msg != NULL) { |
| 4970 | pci_free_consistent(pinstance->pdev, |
| 4971 | PMCRAID_AEN_HDR_SIZE + |
| 4972 | sizeof(struct pmcraid_hcam_ldn), |
| 4973 | pinstance->ldn.msg, |
| 4974 | pinstance->ldn.baddr); |
| 4975 | |
| 4976 | pinstance->ldn.msg = NULL; |
| 4977 | pinstance->ldn.hcam = NULL; |
| 4978 | pinstance->ldn.baddr = 0; |
| 4979 | } |
| 4980 | } |
| 4981 | |
| 4982 | /** |
| 4983 | * pmcraid_allocate_hcams - allocates HCAM buffers |
| 4984 | * @pinstance : pointer to per adapter instance structure |
| 4985 | * |
| 4986 | * Return Value: |
| 4987 | * 0 in case of successful allocation, non-zero otherwise |
| 4988 | */ |
| 4989 | static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance) |
| 4990 | { |
| 4991 | pinstance->ccn.msg = pci_alloc_consistent( |
| 4992 | pinstance->pdev, |
| 4993 | PMCRAID_AEN_HDR_SIZE + |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 4994 | sizeof(struct pmcraid_hcam_ccn_ext), |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 4995 | &(pinstance->ccn.baddr)); |
| 4996 | |
| 4997 | pinstance->ldn.msg = pci_alloc_consistent( |
| 4998 | pinstance->pdev, |
| 4999 | PMCRAID_AEN_HDR_SIZE + |
| 5000 | sizeof(struct pmcraid_hcam_ldn), |
| 5001 | &(pinstance->ldn.baddr)); |
| 5002 | |
| 5003 | if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) { |
| 5004 | pmcraid_release_hcams(pinstance); |
| 5005 | } else { |
| 5006 | pinstance->ccn.hcam = |
| 5007 | (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE; |
| 5008 | pinstance->ldn.hcam = |
| 5009 | (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE; |
| 5010 | |
| 5011 | atomic_set(&pinstance->ccn.ignore, 0); |
| 5012 | atomic_set(&pinstance->ldn.ignore, 0); |
| 5013 | } |
| 5014 | |
| 5015 | return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0; |
| 5016 | } |
| 5017 | |
| 5018 | /** |
| 5019 | * pmcraid_release_config_buffers - release config.table buffers |
| 5020 | * @pinstance: pointer to per adapter instance structure |
| 5021 | * |
| 5022 | * Return Value |
| 5023 | * none |
| 5024 | */ |
| 5025 | static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance) |
| 5026 | { |
| 5027 | if (pinstance->cfg_table != NULL && |
| 5028 | pinstance->cfg_table_bus_addr != 0) { |
| 5029 | pci_free_consistent(pinstance->pdev, |
| 5030 | sizeof(struct pmcraid_config_table), |
| 5031 | pinstance->cfg_table, |
| 5032 | pinstance->cfg_table_bus_addr); |
| 5033 | pinstance->cfg_table = NULL; |
| 5034 | pinstance->cfg_table_bus_addr = 0; |
| 5035 | } |
| 5036 | |
| 5037 | if (pinstance->res_entries != NULL) { |
| 5038 | int i; |
| 5039 | |
| 5040 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++) |
| 5041 | list_del(&pinstance->res_entries[i].queue); |
| 5042 | kfree(pinstance->res_entries); |
| 5043 | pinstance->res_entries = NULL; |
| 5044 | } |
| 5045 | |
| 5046 | pmcraid_release_hcams(pinstance); |
| 5047 | } |
| 5048 | |
| 5049 | /** |
| 5050 | * pmcraid_allocate_config_buffers - allocates DMAable memory for config table |
| 5051 | * @pinstance : pointer to per adapter instance structure |
| 5052 | * |
| 5053 | * Return Value |
| 5054 | * 0 for successful allocation, -ENOMEM for any failure |
| 5055 | */ |
| 5056 | static int __devinit |
| 5057 | pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance) |
| 5058 | { |
| 5059 | int i; |
| 5060 | |
| 5061 | pinstance->res_entries = |
| 5062 | kzalloc(sizeof(struct pmcraid_resource_entry) * |
| 5063 | PMCRAID_MAX_RESOURCES, GFP_KERNEL); |
| 5064 | |
| 5065 | if (NULL == pinstance->res_entries) { |
| 5066 | pmcraid_err("failed to allocate memory for resource table\n"); |
| 5067 | return -ENOMEM; |
| 5068 | } |
| 5069 | |
| 5070 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++) |
| 5071 | list_add_tail(&pinstance->res_entries[i].queue, |
| 5072 | &pinstance->free_res_q); |
| 5073 | |
| 5074 | pinstance->cfg_table = |
| 5075 | pci_alloc_consistent(pinstance->pdev, |
| 5076 | sizeof(struct pmcraid_config_table), |
| 5077 | &pinstance->cfg_table_bus_addr); |
| 5078 | |
| 5079 | if (NULL == pinstance->cfg_table) { |
| 5080 | pmcraid_err("couldn't alloc DMA memory for config table\n"); |
| 5081 | pmcraid_release_config_buffers(pinstance); |
| 5082 | return -ENOMEM; |
| 5083 | } |
| 5084 | |
| 5085 | if (pmcraid_allocate_hcams(pinstance)) { |
| 5086 | pmcraid_err("could not alloc DMA memory for HCAMS\n"); |
| 5087 | pmcraid_release_config_buffers(pinstance); |
| 5088 | return -ENOMEM; |
| 5089 | } |
| 5090 | |
| 5091 | return 0; |
| 5092 | } |
| 5093 | |
| 5094 | /** |
| 5095 | * pmcraid_init_tasklets - registers tasklets for response handling |
| 5096 | * |
| 5097 | * @pinstance: pointer adapter instance structure |
| 5098 | * |
| 5099 | * Return value |
| 5100 | * none |
| 5101 | */ |
| 5102 | static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance) |
| 5103 | { |
| 5104 | int i; |
| 5105 | for (i = 0; i < pinstance->num_hrrq; i++) |
| 5106 | tasklet_init(&pinstance->isr_tasklet[i], |
| 5107 | pmcraid_tasklet_function, |
| 5108 | (unsigned long)&pinstance->hrrq_vector[i]); |
| 5109 | } |
| 5110 | |
| 5111 | /** |
| 5112 | * pmcraid_kill_tasklets - destroys tasklets registered for response handling |
| 5113 | * |
| 5114 | * @pinstance: pointer to adapter instance structure |
| 5115 | * |
| 5116 | * Return value |
| 5117 | * none |
| 5118 | */ |
| 5119 | static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance) |
| 5120 | { |
| 5121 | int i; |
| 5122 | for (i = 0; i < pinstance->num_hrrq; i++) |
| 5123 | tasklet_kill(&pinstance->isr_tasklet[i]); |
| 5124 | } |
| 5125 | |
| 5126 | /** |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5127 | * pmcraid_release_buffers - release per-adapter buffers allocated |
| 5128 | * |
| 5129 | * @pinstance: pointer to adapter soft state |
| 5130 | * |
| 5131 | * Return Value |
| 5132 | * none |
| 5133 | */ |
| 5134 | static void pmcraid_release_buffers(struct pmcraid_instance *pinstance) |
| 5135 | { |
| 5136 | pmcraid_release_config_buffers(pinstance); |
| 5137 | pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD); |
| 5138 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD); |
| 5139 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
| 5140 | |
| 5141 | if (pinstance->inq_data != NULL) { |
| 5142 | pci_free_consistent(pinstance->pdev, |
| 5143 | sizeof(struct pmcraid_inquiry_data), |
| 5144 | pinstance->inq_data, |
| 5145 | pinstance->inq_data_baddr); |
| 5146 | |
| 5147 | pinstance->inq_data = NULL; |
| 5148 | pinstance->inq_data_baddr = 0; |
| 5149 | } |
| 5150 | } |
| 5151 | |
| 5152 | /** |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5153 | * pmcraid_init_buffers - allocates memory and initializes various structures |
| 5154 | * @pinstance: pointer to per adapter instance structure |
| 5155 | * |
| 5156 | * This routine pre-allocates memory based on the type of block as below: |
| 5157 | * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator, |
| 5158 | * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator |
| 5159 | * config-table entries : DMAable memory using pci_alloc_consistent |
| 5160 | * HostRRQs : DMAable memory, using pci_alloc_consistent |
| 5161 | * |
| 5162 | * Return Value |
| 5163 | * 0 in case all of the blocks are allocated, -ENOMEM otherwise. |
| 5164 | */ |
| 5165 | static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance) |
| 5166 | { |
| 5167 | int i; |
| 5168 | |
| 5169 | if (pmcraid_allocate_host_rrqs(pinstance)) { |
| 5170 | pmcraid_err("couldn't allocate memory for %d host rrqs\n", |
| 5171 | pinstance->num_hrrq); |
| 5172 | return -ENOMEM; |
| 5173 | } |
| 5174 | |
| 5175 | if (pmcraid_allocate_config_buffers(pinstance)) { |
| 5176 | pmcraid_err("couldn't allocate memory for config buffers\n"); |
| 5177 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
| 5178 | return -ENOMEM; |
| 5179 | } |
| 5180 | |
| 5181 | if (pmcraid_allocate_cmd_blocks(pinstance)) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5182 | pmcraid_err("couldn't allocate memory for cmd blocks\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5183 | pmcraid_release_config_buffers(pinstance); |
| 5184 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
| 5185 | return -ENOMEM; |
| 5186 | } |
| 5187 | |
| 5188 | if (pmcraid_allocate_control_blocks(pinstance)) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5189 | pmcraid_err("couldn't allocate memory control blocks\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5190 | pmcraid_release_config_buffers(pinstance); |
| 5191 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD); |
| 5192 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
| 5193 | return -ENOMEM; |
| 5194 | } |
| 5195 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5196 | /* allocate DMAable memory for page D0 INQUIRY buffer */ |
| 5197 | pinstance->inq_data = pci_alloc_consistent( |
| 5198 | pinstance->pdev, |
| 5199 | sizeof(struct pmcraid_inquiry_data), |
| 5200 | &pinstance->inq_data_baddr); |
| 5201 | |
| 5202 | if (pinstance->inq_data == NULL) { |
| 5203 | pmcraid_err("couldn't allocate DMA memory for INQUIRY\n"); |
| 5204 | pmcraid_release_buffers(pinstance); |
| 5205 | return -ENOMEM; |
| 5206 | } |
| 5207 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5208 | /* Initialize all the command blocks and add them to free pool. No |
| 5209 | * need to lock (free_pool_lock) as this is done in initialization |
| 5210 | * itself |
| 5211 | */ |
| 5212 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { |
| 5213 | struct pmcraid_cmd *cmdp = pinstance->cmd_list[i]; |
| 5214 | pmcraid_init_cmdblk(cmdp, i); |
| 5215 | cmdp->drv_inst = pinstance; |
| 5216 | list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool); |
| 5217 | } |
| 5218 | |
| 5219 | return 0; |
| 5220 | } |
| 5221 | |
| 5222 | /** |
| 5223 | * pmcraid_reinit_buffers - resets various buffer pointers |
| 5224 | * @pinstance: pointer to adapter instance |
| 5225 | * Return value |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5226 | * none |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5227 | */ |
| 5228 | static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance) |
| 5229 | { |
| 5230 | int i; |
| 5231 | int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD; |
| 5232 | |
| 5233 | for (i = 0; i < pinstance->num_hrrq; i++) { |
| 5234 | memset(pinstance->hrrq_start[i], 0, buffer_size); |
| 5235 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i]; |
| 5236 | pinstance->hrrq_end[i] = |
| 5237 | pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1; |
| 5238 | pinstance->host_toggle_bit[i] = 1; |
| 5239 | } |
| 5240 | } |
| 5241 | |
| 5242 | /** |
| 5243 | * pmcraid_init_instance - initialize per instance data structure |
| 5244 | * @pdev: pointer to pci device structure |
| 5245 | * @host: pointer to Scsi_Host structure |
| 5246 | * @mapped_pci_addr: memory mapped IOA configuration registers |
| 5247 | * |
| 5248 | * Return Value |
| 5249 | * 0 on success, non-zero in case of any failure |
| 5250 | */ |
| 5251 | static int __devinit pmcraid_init_instance( |
| 5252 | struct pci_dev *pdev, |
| 5253 | struct Scsi_Host *host, |
| 5254 | void __iomem *mapped_pci_addr |
| 5255 | ) |
| 5256 | { |
| 5257 | struct pmcraid_instance *pinstance = |
| 5258 | (struct pmcraid_instance *)host->hostdata; |
| 5259 | |
| 5260 | pinstance->host = host; |
| 5261 | pinstance->pdev = pdev; |
| 5262 | |
| 5263 | /* Initialize register addresses */ |
| 5264 | pinstance->mapped_dma_addr = mapped_pci_addr; |
| 5265 | |
| 5266 | /* Initialize chip-specific details */ |
| 5267 | { |
| 5268 | struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg; |
| 5269 | struct pmcraid_interrupts *pint_regs = &pinstance->int_regs; |
| 5270 | |
| 5271 | pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin; |
| 5272 | |
| 5273 | pint_regs->ioa_host_interrupt_reg = |
| 5274 | mapped_pci_addr + chip_cfg->ioa_host_intr; |
| 5275 | pint_regs->ioa_host_interrupt_clr_reg = |
| 5276 | mapped_pci_addr + chip_cfg->ioa_host_intr_clr; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5277 | pint_regs->ioa_host_msix_interrupt_reg = |
| 5278 | mapped_pci_addr + chip_cfg->ioa_host_msix_intr; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5279 | pint_regs->host_ioa_interrupt_reg = |
| 5280 | mapped_pci_addr + chip_cfg->host_ioa_intr; |
| 5281 | pint_regs->host_ioa_interrupt_clr_reg = |
| 5282 | mapped_pci_addr + chip_cfg->host_ioa_intr_clr; |
| 5283 | |
| 5284 | /* Current version of firmware exposes interrupt mask set |
| 5285 | * and mask clr registers through memory mapped bar0. |
| 5286 | */ |
| 5287 | pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox; |
| 5288 | pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus; |
| 5289 | pint_regs->ioa_host_interrupt_mask_reg = |
| 5290 | mapped_pci_addr + chip_cfg->ioa_host_mask; |
| 5291 | pint_regs->ioa_host_interrupt_mask_clr_reg = |
| 5292 | mapped_pci_addr + chip_cfg->ioa_host_mask_clr; |
| 5293 | pint_regs->global_interrupt_mask_reg = |
| 5294 | mapped_pci_addr + chip_cfg->global_intr_mask; |
| 5295 | }; |
| 5296 | |
| 5297 | pinstance->ioa_reset_attempts = 0; |
| 5298 | init_waitqueue_head(&pinstance->reset_wait_q); |
| 5299 | |
| 5300 | atomic_set(&pinstance->outstanding_cmds, 0); |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5301 | atomic_set(&pinstance->last_message_id, 0); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5302 | atomic_set(&pinstance->expose_resources, 0); |
| 5303 | |
| 5304 | INIT_LIST_HEAD(&pinstance->free_res_q); |
| 5305 | INIT_LIST_HEAD(&pinstance->used_res_q); |
| 5306 | INIT_LIST_HEAD(&pinstance->free_cmd_pool); |
| 5307 | INIT_LIST_HEAD(&pinstance->pending_cmd_pool); |
| 5308 | |
| 5309 | spin_lock_init(&pinstance->free_pool_lock); |
| 5310 | spin_lock_init(&pinstance->pending_pool_lock); |
| 5311 | spin_lock_init(&pinstance->resource_lock); |
| 5312 | mutex_init(&pinstance->aen_queue_lock); |
| 5313 | |
| 5314 | /* Work-queue (Shared) for deferred processing error handling */ |
| 5315 | INIT_WORK(&pinstance->worker_q, pmcraid_worker_function); |
| 5316 | |
| 5317 | /* Initialize the default log_level */ |
| 5318 | pinstance->current_log_level = pmcraid_log_level; |
| 5319 | |
| 5320 | /* Setup variables required for reset engine */ |
| 5321 | pinstance->ioa_state = IOA_STATE_UNKNOWN; |
| 5322 | pinstance->reset_cmd = NULL; |
| 5323 | return 0; |
| 5324 | } |
| 5325 | |
| 5326 | /** |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5327 | * pmcraid_shutdown - shutdown adapter controller. |
| 5328 | * @pdev: pci device struct |
| 5329 | * |
| 5330 | * Issues an adapter shutdown to the card waits for its completion |
| 5331 | * |
| 5332 | * Return value |
| 5333 | * none |
| 5334 | */ |
| 5335 | static void pmcraid_shutdown(struct pci_dev *pdev) |
| 5336 | { |
| 5337 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
| 5338 | pmcraid_reset_bringdown(pinstance); |
| 5339 | } |
| 5340 | |
| 5341 | |
| 5342 | /** |
| 5343 | * pmcraid_get_minor - returns unused minor number from minor number bitmap |
| 5344 | */ |
| 5345 | static unsigned short pmcraid_get_minor(void) |
| 5346 | { |
| 5347 | int minor; |
| 5348 | |
| 5349 | minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor)); |
| 5350 | __set_bit(minor, pmcraid_minor); |
| 5351 | return minor; |
| 5352 | } |
| 5353 | |
| 5354 | /** |
| 5355 | * pmcraid_release_minor - releases given minor back to minor number bitmap |
| 5356 | */ |
| 5357 | static void pmcraid_release_minor(unsigned short minor) |
| 5358 | { |
| 5359 | __clear_bit(minor, pmcraid_minor); |
| 5360 | } |
| 5361 | |
| 5362 | /** |
| 5363 | * pmcraid_setup_chrdev - allocates a minor number and registers a char device |
| 5364 | * |
| 5365 | * @pinstance: pointer to adapter instance for which to register device |
| 5366 | * |
| 5367 | * Return value |
| 5368 | * 0 in case of success, otherwise non-zero |
| 5369 | */ |
| 5370 | static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance) |
| 5371 | { |
| 5372 | int minor; |
| 5373 | int error; |
| 5374 | |
| 5375 | minor = pmcraid_get_minor(); |
| 5376 | cdev_init(&pinstance->cdev, &pmcraid_fops); |
| 5377 | pinstance->cdev.owner = THIS_MODULE; |
| 5378 | |
| 5379 | error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1); |
| 5380 | |
| 5381 | if (error) |
| 5382 | pmcraid_release_minor(minor); |
| 5383 | else |
| 5384 | device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor), |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5385 | NULL, "%s%u", PMCRAID_DEVFILE, minor); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5386 | return error; |
| 5387 | } |
| 5388 | |
| 5389 | /** |
| 5390 | * pmcraid_release_chrdev - unregisters per-adapter management interface |
| 5391 | * |
| 5392 | * @pinstance: pointer to adapter instance structure |
| 5393 | * |
| 5394 | * Return value |
| 5395 | * none |
| 5396 | */ |
| 5397 | static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance) |
| 5398 | { |
| 5399 | pmcraid_release_minor(MINOR(pinstance->cdev.dev)); |
| 5400 | device_destroy(pmcraid_class, |
| 5401 | MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev))); |
| 5402 | cdev_del(&pinstance->cdev); |
| 5403 | } |
| 5404 | |
| 5405 | /** |
| 5406 | * pmcraid_remove - IOA hot plug remove entry point |
| 5407 | * @pdev: pci device struct |
| 5408 | * |
| 5409 | * Return value |
| 5410 | * none |
| 5411 | */ |
| 5412 | static void __devexit pmcraid_remove(struct pci_dev *pdev) |
| 5413 | { |
| 5414 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
| 5415 | |
| 5416 | /* remove the management interface (/dev file) for this device */ |
| 5417 | pmcraid_release_chrdev(pinstance); |
| 5418 | |
| 5419 | /* remove host template from scsi midlayer */ |
| 5420 | scsi_remove_host(pinstance->host); |
| 5421 | |
| 5422 | /* block requests from mid-layer */ |
| 5423 | scsi_block_requests(pinstance->host); |
| 5424 | |
| 5425 | /* initiate shutdown adapter */ |
| 5426 | pmcraid_shutdown(pdev); |
| 5427 | |
| 5428 | pmcraid_disable_interrupts(pinstance, ~0); |
| 5429 | flush_scheduled_work(); |
| 5430 | |
| 5431 | pmcraid_kill_tasklets(pinstance); |
| 5432 | pmcraid_unregister_interrupt_handler(pinstance); |
| 5433 | pmcraid_release_buffers(pinstance); |
| 5434 | iounmap(pinstance->mapped_dma_addr); |
| 5435 | pci_release_regions(pdev); |
| 5436 | scsi_host_put(pinstance->host); |
| 5437 | pci_disable_device(pdev); |
| 5438 | |
| 5439 | return; |
| 5440 | } |
| 5441 | |
| 5442 | #ifdef CONFIG_PM |
| 5443 | /** |
| 5444 | * pmcraid_suspend - driver suspend entry point for power management |
| 5445 | * @pdev: PCI device structure |
| 5446 | * @state: PCI power state to suspend routine |
| 5447 | * |
| 5448 | * Return Value - 0 always |
| 5449 | */ |
| 5450 | static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state) |
| 5451 | { |
| 5452 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
| 5453 | |
| 5454 | pmcraid_shutdown(pdev); |
| 5455 | pmcraid_disable_interrupts(pinstance, ~0); |
| 5456 | pmcraid_kill_tasklets(pinstance); |
| 5457 | pci_set_drvdata(pinstance->pdev, pinstance); |
| 5458 | pmcraid_unregister_interrupt_handler(pinstance); |
| 5459 | pci_save_state(pdev); |
| 5460 | pci_disable_device(pdev); |
| 5461 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| 5462 | |
| 5463 | return 0; |
| 5464 | } |
| 5465 | |
| 5466 | /** |
| 5467 | * pmcraid_resume - driver resume entry point PCI power management |
| 5468 | * @pdev: PCI device structure |
| 5469 | * |
| 5470 | * Return Value - 0 in case of success. Error code in case of any failure |
| 5471 | */ |
| 5472 | static int pmcraid_resume(struct pci_dev *pdev) |
| 5473 | { |
| 5474 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
| 5475 | struct Scsi_Host *host = pinstance->host; |
| 5476 | int rc; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5477 | |
| 5478 | pci_set_power_state(pdev, PCI_D0); |
| 5479 | pci_enable_wake(pdev, PCI_D0, 0); |
| 5480 | pci_restore_state(pdev); |
| 5481 | |
| 5482 | rc = pci_enable_device(pdev); |
| 5483 | |
| 5484 | if (rc) { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 5485 | dev_err(&pdev->dev, "resume: Enable device failed\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5486 | return rc; |
| 5487 | } |
| 5488 | |
| 5489 | pci_set_master(pdev); |
| 5490 | |
| 5491 | if ((sizeof(dma_addr_t) == 4) || |
| 5492 | pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) |
| 5493 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| 5494 | |
| 5495 | if (rc == 0) |
| 5496 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
| 5497 | |
| 5498 | if (rc != 0) { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 5499 | dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5500 | goto disable_device; |
| 5501 | } |
| 5502 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5503 | pmcraid_disable_interrupts(pinstance, ~0); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5504 | atomic_set(&pinstance->outstanding_cmds, 0); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5505 | rc = pmcraid_register_interrupt_handler(pinstance); |
| 5506 | |
| 5507 | if (rc) { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 5508 | dev_err(&pdev->dev, |
| 5509 | "resume: couldn't register interrupt handlers\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5510 | rc = -ENODEV; |
| 5511 | goto release_host; |
| 5512 | } |
| 5513 | |
| 5514 | pmcraid_init_tasklets(pinstance); |
| 5515 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
| 5516 | |
| 5517 | /* Start with hard reset sequence which brings up IOA to operational |
| 5518 | * state as well as completes the reset sequence. |
| 5519 | */ |
| 5520 | pinstance->ioa_hard_reset = 1; |
| 5521 | |
| 5522 | /* Start IOA firmware initialization and bring card to Operational |
| 5523 | * state. |
| 5524 | */ |
| 5525 | if (pmcraid_reset_bringup(pinstance)) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5526 | dev_err(&pdev->dev, "couldn't initialize IOA\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5527 | rc = -ENODEV; |
| 5528 | goto release_tasklets; |
| 5529 | } |
| 5530 | |
| 5531 | return 0; |
| 5532 | |
| 5533 | release_tasklets: |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5534 | pmcraid_disable_interrupts(pinstance, ~0); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5535 | pmcraid_kill_tasklets(pinstance); |
| 5536 | pmcraid_unregister_interrupt_handler(pinstance); |
| 5537 | |
| 5538 | release_host: |
| 5539 | scsi_host_put(host); |
| 5540 | |
| 5541 | disable_device: |
| 5542 | pci_disable_device(pdev); |
| 5543 | |
| 5544 | return rc; |
| 5545 | } |
| 5546 | |
| 5547 | #else |
| 5548 | |
| 5549 | #define pmcraid_suspend NULL |
| 5550 | #define pmcraid_resume NULL |
| 5551 | |
| 5552 | #endif /* CONFIG_PM */ |
| 5553 | |
| 5554 | /** |
| 5555 | * pmcraid_complete_ioa_reset - Called by either timer or tasklet during |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5556 | * completion of the ioa reset |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5557 | * @cmd: pointer to reset command block |
| 5558 | */ |
| 5559 | static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd) |
| 5560 | { |
| 5561 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 5562 | unsigned long flags; |
| 5563 | |
| 5564 | spin_lock_irqsave(pinstance->host->host_lock, flags); |
| 5565 | pmcraid_ioa_reset(cmd); |
| 5566 | spin_unlock_irqrestore(pinstance->host->host_lock, flags); |
| 5567 | scsi_unblock_requests(pinstance->host); |
| 5568 | schedule_work(&pinstance->worker_q); |
| 5569 | } |
| 5570 | |
| 5571 | /** |
| 5572 | * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP |
| 5573 | * |
| 5574 | * @cmd: pointer to pmcraid_cmd structure |
| 5575 | * |
| 5576 | * Return Value |
| 5577 | * 0 for success or non-zero for failure cases |
| 5578 | */ |
| 5579 | static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd) |
| 5580 | { |
| 5581 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| 5582 | void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset; |
| 5583 | |
| 5584 | pmcraid_reinit_cmdblk(cmd); |
| 5585 | |
| 5586 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
| 5587 | ioarcb->request_type = REQ_TYPE_IOACMD; |
| 5588 | ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES; |
| 5589 | ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED; |
| 5590 | |
| 5591 | /* If this was called as part of resource table reinitialization due to |
| 5592 | * lost CCN, it is enough to return the command block back to free pool |
| 5593 | * as part of set_supported_devs completion function. |
| 5594 | */ |
| 5595 | if (cmd->drv_inst->reinit_cfg_table) { |
| 5596 | cmd->drv_inst->reinit_cfg_table = 0; |
| 5597 | cmd->release = 1; |
| 5598 | cmd_done = pmcraid_reinit_cfgtable_done; |
| 5599 | } |
| 5600 | |
| 5601 | /* we will be done with the reset sequence after set supported devices, |
| 5602 | * setup the done function to return the command block back to free |
| 5603 | * pool |
| 5604 | */ |
| 5605 | pmcraid_send_cmd(cmd, |
| 5606 | cmd_done, |
| 5607 | PMCRAID_SET_SUP_DEV_TIMEOUT, |
| 5608 | pmcraid_timeout_handler); |
| 5609 | return; |
| 5610 | } |
| 5611 | |
| 5612 | /** |
| 5613 | * pmcraid_init_res_table - Initialize the resource table |
| 5614 | * @cmd: pointer to pmcraid command struct |
| 5615 | * |
| 5616 | * This function looks through the existing resource table, comparing |
| 5617 | * it with the config table. This function will take care of old/new |
| 5618 | * devices and schedule adding/removing them from the mid-layer |
| 5619 | * as appropriate. |
| 5620 | * |
| 5621 | * Return value |
| 5622 | * None |
| 5623 | */ |
| 5624 | static void pmcraid_init_res_table(struct pmcraid_cmd *cmd) |
| 5625 | { |
| 5626 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 5627 | struct pmcraid_resource_entry *res, *temp; |
| 5628 | struct pmcraid_config_table_entry *cfgte; |
| 5629 | unsigned long lock_flags; |
| 5630 | int found, rc, i; |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5631 | u16 fw_version; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5632 | LIST_HEAD(old_res); |
| 5633 | |
| 5634 | if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED) |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 5635 | pmcraid_err("IOA requires microcode download\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5636 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5637 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
| 5638 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5639 | /* resource list is protected by pinstance->resource_lock. |
| 5640 | * init_res_table can be called from probe (user-thread) or runtime |
| 5641 | * reset (timer/tasklet) |
| 5642 | */ |
| 5643 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
| 5644 | |
| 5645 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) |
| 5646 | list_move_tail(&res->queue, &old_res); |
| 5647 | |
| 5648 | for (i = 0; i < pinstance->cfg_table->num_entries; i++) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5649 | if (be16_to_cpu(pinstance->inq_data->fw_version) <= |
| 5650 | PMCRAID_FW_VERSION_1) |
| 5651 | cfgte = &pinstance->cfg_table->entries[i]; |
| 5652 | else |
| 5653 | cfgte = (struct pmcraid_config_table_entry *) |
| 5654 | &pinstance->cfg_table->entries_ext[i]; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5655 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5656 | if (!pmcraid_expose_resource(fw_version, cfgte)) |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5657 | continue; |
| 5658 | |
| 5659 | found = 0; |
| 5660 | |
| 5661 | /* If this entry was already detected and initialized */ |
| 5662 | list_for_each_entry_safe(res, temp, &old_res, queue) { |
| 5663 | |
| 5664 | rc = memcmp(&res->cfg_entry.resource_address, |
| 5665 | &cfgte->resource_address, |
| 5666 | sizeof(cfgte->resource_address)); |
| 5667 | if (!rc) { |
| 5668 | list_move_tail(&res->queue, |
| 5669 | &pinstance->used_res_q); |
| 5670 | found = 1; |
| 5671 | break; |
| 5672 | } |
| 5673 | } |
| 5674 | |
| 5675 | /* If this is new entry, initialize it and add it the queue */ |
| 5676 | if (!found) { |
| 5677 | |
| 5678 | if (list_empty(&pinstance->free_res_q)) { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 5679 | pmcraid_err("Too many devices attached\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5680 | break; |
| 5681 | } |
| 5682 | |
| 5683 | found = 1; |
| 5684 | res = list_entry(pinstance->free_res_q.next, |
| 5685 | struct pmcraid_resource_entry, queue); |
| 5686 | |
| 5687 | res->scsi_dev = NULL; |
| 5688 | res->change_detected = RES_CHANGE_ADD; |
| 5689 | res->reset_progress = 0; |
| 5690 | list_move_tail(&res->queue, &pinstance->used_res_q); |
| 5691 | } |
| 5692 | |
| 5693 | /* copy new configuration table entry details into driver |
| 5694 | * maintained resource entry |
| 5695 | */ |
| 5696 | if (found) { |
| 5697 | memcpy(&res->cfg_entry, cfgte, |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5698 | pinstance->config_table_entry_size); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5699 | pmcraid_info("New res type:%x, vset:%x, addr:%x:\n", |
| 5700 | res->cfg_entry.resource_type, |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5701 | (fw_version <= PMCRAID_FW_VERSION_1 ? |
| 5702 | res->cfg_entry.unique_flags1 : |
| 5703 | res->cfg_entry.array_id & 0xFF), |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5704 | le32_to_cpu(res->cfg_entry.resource_address)); |
| 5705 | } |
| 5706 | } |
| 5707 | |
| 5708 | /* Detect any deleted entries, mark them for deletion from mid-layer */ |
| 5709 | list_for_each_entry_safe(res, temp, &old_res, queue) { |
| 5710 | |
| 5711 | if (res->scsi_dev) { |
| 5712 | res->change_detected = RES_CHANGE_DEL; |
| 5713 | res->cfg_entry.resource_handle = |
| 5714 | PMCRAID_INVALID_RES_HANDLE; |
| 5715 | list_move_tail(&res->queue, &pinstance->used_res_q); |
| 5716 | } else { |
| 5717 | list_move_tail(&res->queue, &pinstance->free_res_q); |
| 5718 | } |
| 5719 | } |
| 5720 | |
| 5721 | /* release the resource list lock */ |
| 5722 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
| 5723 | pmcraid_set_supported_devs(cmd); |
| 5724 | } |
| 5725 | |
| 5726 | /** |
| 5727 | * pmcraid_querycfg - Send a Query IOA Config to the adapter. |
| 5728 | * @cmd: pointer pmcraid_cmd struct |
| 5729 | * |
| 5730 | * This function sends a Query IOA Configuration command to the adapter to |
| 5731 | * retrieve the IOA configuration table. |
| 5732 | * |
| 5733 | * Return value: |
| 5734 | * none |
| 5735 | */ |
| 5736 | static void pmcraid_querycfg(struct pmcraid_cmd *cmd) |
| 5737 | { |
| 5738 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| 5739 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
| 5740 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
| 5741 | int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table)); |
| 5742 | |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5743 | if (be16_to_cpu(pinstance->inq_data->fw_version) <= |
| 5744 | PMCRAID_FW_VERSION_1) |
| 5745 | pinstance->config_table_entry_size = |
| 5746 | sizeof(struct pmcraid_config_table_entry); |
| 5747 | else |
| 5748 | pinstance->config_table_entry_size = |
| 5749 | sizeof(struct pmcraid_config_table_entry_ext); |
| 5750 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5751 | ioarcb->request_type = REQ_TYPE_IOACMD; |
| 5752 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
| 5753 | |
| 5754 | ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG; |
| 5755 | |
| 5756 | /* firmware requires 4-byte length field, specified in B.E format */ |
| 5757 | memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size)); |
| 5758 | |
| 5759 | /* Since entire config table can be described by single IOADL, it can |
| 5760 | * be part of IOARCB itself |
| 5761 | */ |
| 5762 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| 5763 | offsetof(struct pmcraid_ioarcb, |
| 5764 | add_data.u.ioadl[0])); |
| 5765 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
| 5766 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
| 5767 | |
| 5768 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
| 5769 | ioarcb->data_transfer_length = |
| 5770 | cpu_to_le32(sizeof(struct pmcraid_config_table)); |
| 5771 | |
| 5772 | ioadl = &(ioarcb->add_data.u.ioadl[0]); |
Anil Ravindranath | 8819796 | 2009-09-24 16:27:42 -0700 | [diff] [blame] | 5773 | ioadl->flags = IOADL_FLAGS_LAST_DESC; |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5774 | ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr); |
| 5775 | ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table)); |
| 5776 | |
| 5777 | pmcraid_send_cmd(cmd, pmcraid_init_res_table, |
| 5778 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler); |
| 5779 | } |
| 5780 | |
| 5781 | |
| 5782 | /** |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5783 | * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5784 | * @pdev: pointer to pci device structure |
| 5785 | * @dev_id: pointer to device ids structure |
| 5786 | * |
| 5787 | * Return Value |
| 5788 | * returns 0 if the device is claimed and successfully configured. |
| 5789 | * returns non-zero error code in case of any failure |
| 5790 | */ |
| 5791 | static int __devinit pmcraid_probe( |
| 5792 | struct pci_dev *pdev, |
| 5793 | const struct pci_device_id *dev_id |
| 5794 | ) |
| 5795 | { |
| 5796 | struct pmcraid_instance *pinstance; |
| 5797 | struct Scsi_Host *host; |
| 5798 | void __iomem *mapped_pci_addr; |
| 5799 | int rc = PCIBIOS_SUCCESSFUL; |
| 5800 | |
| 5801 | if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) { |
| 5802 | pmcraid_err |
| 5803 | ("maximum number(%d) of supported adapters reached\n", |
| 5804 | atomic_read(&pmcraid_adapter_count)); |
| 5805 | return -ENOMEM; |
| 5806 | } |
| 5807 | |
| 5808 | atomic_inc(&pmcraid_adapter_count); |
| 5809 | rc = pci_enable_device(pdev); |
| 5810 | |
| 5811 | if (rc) { |
| 5812 | dev_err(&pdev->dev, "Cannot enable adapter\n"); |
| 5813 | atomic_dec(&pmcraid_adapter_count); |
| 5814 | return rc; |
| 5815 | } |
| 5816 | |
| 5817 | dev_info(&pdev->dev, |
| 5818 | "Found new IOA(%x:%x), Total IOA count: %d\n", |
| 5819 | pdev->vendor, pdev->device, |
| 5820 | atomic_read(&pmcraid_adapter_count)); |
| 5821 | |
| 5822 | rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME); |
| 5823 | |
| 5824 | if (rc < 0) { |
| 5825 | dev_err(&pdev->dev, |
| 5826 | "Couldn't register memory range of registers\n"); |
| 5827 | goto out_disable_device; |
| 5828 | } |
| 5829 | |
| 5830 | mapped_pci_addr = pci_iomap(pdev, 0, 0); |
| 5831 | |
| 5832 | if (!mapped_pci_addr) { |
| 5833 | dev_err(&pdev->dev, "Couldn't map PCI registers memory\n"); |
| 5834 | rc = -ENOMEM; |
| 5835 | goto out_release_regions; |
| 5836 | } |
| 5837 | |
| 5838 | pci_set_master(pdev); |
| 5839 | |
| 5840 | /* Firmware requires the system bus address of IOARCB to be within |
| 5841 | * 32-bit addressable range though it has 64-bit IOARRIN register. |
| 5842 | * However, firmware supports 64-bit streaming DMA buffers, whereas |
| 5843 | * coherent buffers are to be 32-bit. Since pci_alloc_consistent always |
| 5844 | * returns memory within 4GB (if not, change this logic), coherent |
| 5845 | * buffers are within firmware acceptible address ranges. |
| 5846 | */ |
| 5847 | if ((sizeof(dma_addr_t) == 4) || |
| 5848 | pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) |
| 5849 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| 5850 | |
| 5851 | /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32 |
| 5852 | * bit mask for pci_alloc_consistent to return addresses within 4GB |
| 5853 | */ |
| 5854 | if (rc == 0) |
| 5855 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
| 5856 | |
| 5857 | if (rc != 0) { |
| 5858 | dev_err(&pdev->dev, "Failed to set PCI DMA mask\n"); |
| 5859 | goto cleanup_nomem; |
| 5860 | } |
| 5861 | |
| 5862 | host = scsi_host_alloc(&pmcraid_host_template, |
| 5863 | sizeof(struct pmcraid_instance)); |
| 5864 | |
| 5865 | if (!host) { |
| 5866 | dev_err(&pdev->dev, "scsi_host_alloc failed!\n"); |
| 5867 | rc = -ENOMEM; |
| 5868 | goto cleanup_nomem; |
| 5869 | } |
| 5870 | |
| 5871 | host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS; |
| 5872 | host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET; |
| 5873 | host->unique_id = host->host_no; |
| 5874 | host->max_channel = PMCRAID_MAX_BUS_TO_SCAN; |
| 5875 | host->max_cmd_len = PMCRAID_MAX_CDB_LEN; |
| 5876 | |
| 5877 | /* zero out entire instance structure */ |
| 5878 | pinstance = (struct pmcraid_instance *)host->hostdata; |
| 5879 | memset(pinstance, 0, sizeof(*pinstance)); |
| 5880 | |
| 5881 | pinstance->chip_cfg = |
| 5882 | (struct pmcraid_chip_details *)(dev_id->driver_data); |
| 5883 | |
| 5884 | rc = pmcraid_init_instance(pdev, host, mapped_pci_addr); |
| 5885 | |
| 5886 | if (rc < 0) { |
| 5887 | dev_err(&pdev->dev, "failed to initialize adapter instance\n"); |
| 5888 | goto out_scsi_host_put; |
| 5889 | } |
| 5890 | |
| 5891 | pci_set_drvdata(pdev, pinstance); |
| 5892 | |
| 5893 | /* Save PCI config-space for use following the reset */ |
| 5894 | rc = pci_save_state(pinstance->pdev); |
| 5895 | |
| 5896 | if (rc != 0) { |
| 5897 | dev_err(&pdev->dev, "Failed to save PCI config space\n"); |
| 5898 | goto out_scsi_host_put; |
| 5899 | } |
| 5900 | |
| 5901 | pmcraid_disable_interrupts(pinstance, ~0); |
| 5902 | |
| 5903 | rc = pmcraid_register_interrupt_handler(pinstance); |
| 5904 | |
| 5905 | if (rc) { |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 5906 | dev_err(&pdev->dev, "couldn't register interrupt handler\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5907 | goto out_scsi_host_put; |
| 5908 | } |
| 5909 | |
| 5910 | pmcraid_init_tasklets(pinstance); |
| 5911 | |
| 5912 | /* allocate verious buffers used by LLD.*/ |
| 5913 | rc = pmcraid_init_buffers(pinstance); |
| 5914 | |
| 5915 | if (rc) { |
| 5916 | pmcraid_err("couldn't allocate memory blocks\n"); |
| 5917 | goto out_unregister_isr; |
| 5918 | } |
| 5919 | |
| 5920 | /* check the reset type required */ |
| 5921 | pmcraid_reset_type(pinstance); |
| 5922 | |
| 5923 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
| 5924 | |
| 5925 | /* Start IOA firmware initialization and bring card to Operational |
| 5926 | * state. |
| 5927 | */ |
| 5928 | pmcraid_info("starting IOA initialization sequence\n"); |
| 5929 | if (pmcraid_reset_bringup(pinstance)) { |
Anil Ravindranath | c20c426 | 2010-06-08 10:56:34 -0700 | [diff] [blame] | 5930 | dev_err(&pdev->dev, "couldn't initialize IOA\n"); |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5931 | rc = 1; |
| 5932 | goto out_release_bufs; |
| 5933 | } |
| 5934 | |
| 5935 | /* Add adapter instance into mid-layer list */ |
| 5936 | rc = scsi_add_host(pinstance->host, &pdev->dev); |
| 5937 | if (rc != 0) { |
| 5938 | pmcraid_err("couldn't add host into mid-layer: %d\n", rc); |
| 5939 | goto out_release_bufs; |
| 5940 | } |
| 5941 | |
| 5942 | scsi_scan_host(pinstance->host); |
| 5943 | |
| 5944 | rc = pmcraid_setup_chrdev(pinstance); |
| 5945 | |
| 5946 | if (rc != 0) { |
| 5947 | pmcraid_err("couldn't create mgmt interface, error: %x\n", |
| 5948 | rc); |
| 5949 | goto out_remove_host; |
| 5950 | } |
| 5951 | |
| 5952 | /* Schedule worker thread to handle CCN and take care of adding and |
| 5953 | * removing devices to OS |
| 5954 | */ |
| 5955 | atomic_set(&pinstance->expose_resources, 1); |
| 5956 | schedule_work(&pinstance->worker_q); |
| 5957 | return rc; |
| 5958 | |
| 5959 | out_remove_host: |
| 5960 | scsi_remove_host(host); |
| 5961 | |
| 5962 | out_release_bufs: |
| 5963 | pmcraid_release_buffers(pinstance); |
| 5964 | |
| 5965 | out_unregister_isr: |
| 5966 | pmcraid_kill_tasklets(pinstance); |
| 5967 | pmcraid_unregister_interrupt_handler(pinstance); |
| 5968 | |
| 5969 | out_scsi_host_put: |
| 5970 | scsi_host_put(host); |
| 5971 | |
| 5972 | cleanup_nomem: |
| 5973 | iounmap(mapped_pci_addr); |
| 5974 | |
| 5975 | out_release_regions: |
| 5976 | pci_release_regions(pdev); |
| 5977 | |
| 5978 | out_disable_device: |
| 5979 | atomic_dec(&pmcraid_adapter_count); |
| 5980 | pci_set_drvdata(pdev, NULL); |
| 5981 | pci_disable_device(pdev); |
| 5982 | return -ENODEV; |
| 5983 | } |
| 5984 | |
| 5985 | /* |
| 5986 | * PCI driver structure of pcmraid driver |
| 5987 | */ |
| 5988 | static struct pci_driver pmcraid_driver = { |
| 5989 | .name = PMCRAID_DRIVER_NAME, |
| 5990 | .id_table = pmcraid_pci_table, |
| 5991 | .probe = pmcraid_probe, |
| 5992 | .remove = pmcraid_remove, |
| 5993 | .suspend = pmcraid_suspend, |
| 5994 | .resume = pmcraid_resume, |
| 5995 | .shutdown = pmcraid_shutdown |
| 5996 | }; |
| 5997 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 5998 | /** |
| 5999 | * pmcraid_init - module load entry point |
| 6000 | */ |
| 6001 | static int __init pmcraid_init(void) |
| 6002 | { |
| 6003 | dev_t dev; |
| 6004 | int error; |
| 6005 | |
| 6006 | pmcraid_info("%s Device Driver version: %s %s\n", |
| 6007 | PMCRAID_DRIVER_NAME, |
| 6008 | PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE); |
| 6009 | |
| 6010 | error = alloc_chrdev_region(&dev, 0, |
| 6011 | PMCRAID_MAX_ADAPTERS, |
| 6012 | PMCRAID_DEVFILE); |
| 6013 | |
| 6014 | if (error) { |
| 6015 | pmcraid_err("failed to get a major number for adapters\n"); |
| 6016 | goto out_init; |
| 6017 | } |
| 6018 | |
| 6019 | pmcraid_major = MAJOR(dev); |
| 6020 | pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE); |
| 6021 | |
| 6022 | if (IS_ERR(pmcraid_class)) { |
| 6023 | error = PTR_ERR(pmcraid_class); |
| 6024 | pmcraid_err("failed to register with with sysfs, error = %x\n", |
| 6025 | error); |
| 6026 | goto out_unreg_chrdev; |
| 6027 | } |
| 6028 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 6029 | error = pmcraid_netlink_init(); |
| 6030 | |
| 6031 | if (error) |
| 6032 | goto out_unreg_chrdev; |
| 6033 | |
| 6034 | error = pci_register_driver(&pmcraid_driver); |
| 6035 | |
| 6036 | if (error == 0) |
| 6037 | goto out_init; |
| 6038 | |
| 6039 | pmcraid_err("failed to register pmcraid driver, error = %x\n", |
| 6040 | error); |
| 6041 | class_destroy(pmcraid_class); |
| 6042 | pmcraid_netlink_release(); |
| 6043 | |
| 6044 | out_unreg_chrdev: |
| 6045 | unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS); |
Anil Ravindranath | 3487640 | 2009-09-09 15:54:57 -0700 | [diff] [blame] | 6046 | |
Anil Ravindranath | 89a3681 | 2009-08-25 17:35:18 -0700 | [diff] [blame] | 6047 | out_init: |
| 6048 | return error; |
| 6049 | } |
| 6050 | |
| 6051 | /** |
| 6052 | * pmcraid_exit - module unload entry point |
| 6053 | */ |
| 6054 | static void __exit pmcraid_exit(void) |
| 6055 | { |
| 6056 | pmcraid_netlink_release(); |
| 6057 | class_destroy(pmcraid_class); |
| 6058 | unregister_chrdev_region(MKDEV(pmcraid_major, 0), |
| 6059 | PMCRAID_MAX_ADAPTERS); |
| 6060 | pci_unregister_driver(&pmcraid_driver); |
| 6061 | } |
| 6062 | |
| 6063 | module_init(pmcraid_init); |
| 6064 | module_exit(pmcraid_exit); |