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89a36810 AR |
1 | /* |
2 | * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters | |
3 | * | |
4 | * Written By: PMC Sierra Corporation | |
5 | * | |
6 | * Copyright (C) 2008, 2009 PMC Sierra Inc | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, | |
21 | * USA | |
22 | * | |
23 | */ | |
24 | #include <linux/fs.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/ioport.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/pci.h> | |
32 | #include <linux/wait.h> | |
33 | #include <linux/spinlock.h> | |
34 | #include <linux/sched.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/blkdev.h> | |
37 | #include <linux/firmware.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/moduleparam.h> | |
40 | #include <linux/hdreg.h> | |
41 | #include <linux/version.h> | |
42 | #include <linux/io.h> | |
43 | #include <asm/irq.h> | |
44 | #include <asm/processor.h> | |
45 | #include <linux/libata.h> | |
46 | #include <linux/mutex.h> | |
47 | #include <scsi/scsi.h> | |
48 | #include <scsi/scsi_host.h> | |
49 | #include <scsi/scsi_tcq.h> | |
50 | #include <scsi/scsi_eh.h> | |
51 | #include <scsi/scsi_cmnd.h> | |
52 | #include <scsi/scsicam.h> | |
53 | ||
54 | #include "pmcraid.h" | |
55 | ||
56 | /* | |
57 | * Module configuration parameters | |
58 | */ | |
59 | static unsigned int pmcraid_debug_log; | |
60 | static unsigned int pmcraid_disable_aen; | |
61 | static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST; | |
62 | ||
63 | /* | |
64 | * Data structures to support multiple adapters by the LLD. | |
65 | * pmcraid_adapter_count - count of configured adapters | |
66 | */ | |
67 | static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0); | |
68 | ||
69 | /* | |
70 | * Supporting user-level control interface through IOCTL commands. | |
71 | * pmcraid_major - major number to use | |
72 | * pmcraid_minor - minor number(s) to use | |
73 | */ | |
74 | static unsigned int pmcraid_major; | |
75 | static struct class *pmcraid_class; | |
76 | DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS); | |
77 | ||
78 | /* | |
79 | * Module parameters | |
80 | */ | |
81 | MODULE_AUTHOR("PMC Sierra Corporation, anil_ravindranath@pmc-sierra.com"); | |
82 | MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver"); | |
83 | MODULE_LICENSE("GPL"); | |
84 | MODULE_VERSION(PMCRAID_DRIVER_VERSION); | |
85 | ||
86 | module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR)); | |
87 | MODULE_PARM_DESC(log_level, | |
88 | "Enables firmware error code logging, default :1 high-severity" | |
89 | " errors, 2: all errors including high-severity errors," | |
90 | " 0: disables logging"); | |
91 | ||
92 | module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR)); | |
93 | MODULE_PARM_DESC(debug, | |
94 | "Enable driver verbose message logging. Set 1 to enable." | |
95 | "(default: 0)"); | |
96 | ||
97 | module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR)); | |
98 | MODULE_PARM_DESC(disable_aen, | |
99 | "Disable driver aen notifications to apps. Set 1 to disable." | |
100 | "(default: 0)"); | |
101 | ||
102 | /* chip specific constants for PMC MaxRAID controllers (same for | |
103 | * 0x5220 and 0x8010 | |
104 | */ | |
105 | static struct pmcraid_chip_details pmcraid_chip_cfg[] = { | |
106 | { | |
107 | .ioastatus = 0x0, | |
108 | .ioarrin = 0x00040, | |
109 | .mailbox = 0x7FC30, | |
110 | .global_intr_mask = 0x00034, | |
111 | .ioa_host_intr = 0x0009C, | |
112 | .ioa_host_intr_clr = 0x000A0, | |
113 | .ioa_host_mask = 0x7FC28, | |
114 | .ioa_host_mask_clr = 0x7FC28, | |
115 | .host_ioa_intr = 0x00020, | |
116 | .host_ioa_intr_clr = 0x00020, | |
117 | .transop_timeout = 300 | |
118 | } | |
119 | }; | |
120 | ||
121 | /* | |
122 | * PCI device ids supported by pmcraid driver | |
123 | */ | |
124 | static struct pci_device_id pmcraid_pci_table[] __devinitdata = { | |
125 | { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID), | |
126 | 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0] | |
127 | }, | |
128 | {} | |
129 | }; | |
130 | ||
131 | MODULE_DEVICE_TABLE(pci, pmcraid_pci_table); | |
132 | ||
133 | ||
134 | ||
135 | /** | |
136 | * pmcraid_slave_alloc - Prepare for commands to a device | |
137 | * @scsi_dev: scsi device struct | |
138 | * | |
139 | * This function is called by mid-layer prior to sending any command to the new | |
140 | * device. Stores resource entry details of the device in scsi_device struct. | |
141 | * Queuecommand uses the resource handle and other details to fill up IOARCB | |
142 | * while sending commands to the device. | |
143 | * | |
144 | * Return value: | |
145 | * 0 on success / -ENXIO if device does not exist | |
146 | */ | |
147 | static int pmcraid_slave_alloc(struct scsi_device *scsi_dev) | |
148 | { | |
149 | struct pmcraid_resource_entry *temp, *res = NULL; | |
150 | struct pmcraid_instance *pinstance; | |
151 | u8 target, bus, lun; | |
152 | unsigned long lock_flags; | |
153 | int rc = -ENXIO; | |
154 | pinstance = shost_priv(scsi_dev->host); | |
155 | ||
156 | /* Driver exposes VSET and GSCSI resources only; all other device types | |
157 | * are not exposed. Resource list is synchronized using resource lock | |
158 | * so any traversal or modifications to the list should be done inside | |
159 | * this lock | |
160 | */ | |
161 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); | |
162 | list_for_each_entry(temp, &pinstance->used_res_q, queue) { | |
163 | ||
164 | /* do not expose VSETs with order-ids >= 240 */ | |
165 | if (RES_IS_VSET(temp->cfg_entry)) { | |
166 | target = temp->cfg_entry.unique_flags1; | |
167 | if (target >= PMCRAID_MAX_VSET_TARGETS) | |
168 | continue; | |
169 | bus = PMCRAID_VSET_BUS_ID; | |
170 | lun = 0; | |
171 | } else if (RES_IS_GSCSI(temp->cfg_entry)) { | |
172 | target = RES_TARGET(temp->cfg_entry.resource_address); | |
173 | bus = PMCRAID_PHYS_BUS_ID; | |
174 | lun = RES_LUN(temp->cfg_entry.resource_address); | |
175 | } else { | |
176 | continue; | |
177 | } | |
178 | ||
179 | if (bus == scsi_dev->channel && | |
180 | target == scsi_dev->id && | |
181 | lun == scsi_dev->lun) { | |
182 | res = temp; | |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
187 | if (res) { | |
188 | res->scsi_dev = scsi_dev; | |
189 | scsi_dev->hostdata = res; | |
190 | res->change_detected = 0; | |
191 | atomic_set(&res->read_failures, 0); | |
192 | atomic_set(&res->write_failures, 0); | |
193 | rc = 0; | |
194 | } | |
195 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); | |
196 | return rc; | |
197 | } | |
198 | ||
199 | /** | |
200 | * pmcraid_slave_configure - Configures a SCSI device | |
201 | * @scsi_dev: scsi device struct | |
202 | * | |
203 | * This fucntion is executed by SCSI mid layer just after a device is first | |
204 | * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the | |
205 | * timeout value (default 30s) will be over-written to a higher value (60s) | |
206 | * and max_sectors value will be over-written to 512. It also sets queue depth | |
207 | * to host->cmd_per_lun value | |
208 | * | |
209 | * Return value: | |
210 | * 0 on success | |
211 | */ | |
212 | static int pmcraid_slave_configure(struct scsi_device *scsi_dev) | |
213 | { | |
214 | struct pmcraid_resource_entry *res = scsi_dev->hostdata; | |
215 | ||
216 | if (!res) | |
217 | return 0; | |
218 | ||
219 | /* LLD exposes VSETs and Enclosure devices only */ | |
220 | if (RES_IS_GSCSI(res->cfg_entry) && | |
221 | scsi_dev->type != TYPE_ENCLOSURE) | |
222 | return -ENXIO; | |
223 | ||
224 | pmcraid_info("configuring %x:%x:%x:%x\n", | |
225 | scsi_dev->host->unique_id, | |
226 | scsi_dev->channel, | |
227 | scsi_dev->id, | |
228 | scsi_dev->lun); | |
229 | ||
230 | if (RES_IS_GSCSI(res->cfg_entry)) { | |
231 | scsi_dev->allow_restart = 1; | |
232 | } else if (RES_IS_VSET(res->cfg_entry)) { | |
233 | scsi_dev->allow_restart = 1; | |
234 | blk_queue_rq_timeout(scsi_dev->request_queue, | |
235 | PMCRAID_VSET_IO_TIMEOUT); | |
236 | blk_queue_max_sectors(scsi_dev->request_queue, | |
237 | PMCRAID_VSET_MAX_SECTORS); | |
238 | } | |
239 | ||
240 | if (scsi_dev->tagged_supported && | |
241 | (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { | |
242 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); | |
243 | scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG, | |
244 | scsi_dev->host->cmd_per_lun); | |
245 | } else { | |
246 | scsi_adjust_queue_depth(scsi_dev, 0, | |
247 | scsi_dev->host->cmd_per_lun); | |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | /** | |
254 | * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it | |
255 | * | |
256 | * @scsi_dev: scsi device struct | |
257 | * | |
258 | * This is called by mid-layer before removing a device. Pointer assignments | |
259 | * done in pmcraid_slave_alloc will be reset to NULL here. | |
260 | * | |
261 | * Return value | |
262 | * none | |
263 | */ | |
264 | static void pmcraid_slave_destroy(struct scsi_device *scsi_dev) | |
265 | { | |
266 | struct pmcraid_resource_entry *res; | |
267 | ||
268 | res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; | |
269 | ||
270 | if (res) | |
271 | res->scsi_dev = NULL; | |
272 | ||
273 | scsi_dev->hostdata = NULL; | |
274 | } | |
275 | ||
276 | /** | |
277 | * pmcraid_change_queue_depth - Change the device's queue depth | |
278 | * @scsi_dev: scsi device struct | |
279 | * @depth: depth to set | |
280 | * | |
281 | * Return value | |
282 | * actual depth set | |
283 | */ | |
284 | static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth) | |
285 | { | |
286 | if (depth > PMCRAID_MAX_CMD_PER_LUN) | |
287 | depth = PMCRAID_MAX_CMD_PER_LUN; | |
288 | ||
289 | scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth); | |
290 | ||
291 | return scsi_dev->queue_depth; | |
292 | } | |
293 | ||
294 | /** | |
295 | * pmcraid_change_queue_type - Change the device's queue type | |
296 | * @scsi_dev: scsi device struct | |
297 | * @tag: type of tags to use | |
298 | * | |
299 | * Return value: | |
300 | * actual queue type set | |
301 | */ | |
302 | static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag) | |
303 | { | |
304 | struct pmcraid_resource_entry *res; | |
305 | ||
306 | res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; | |
307 | ||
308 | if ((res) && scsi_dev->tagged_supported && | |
309 | (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { | |
310 | scsi_set_tag_type(scsi_dev, tag); | |
311 | ||
312 | if (tag) | |
313 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); | |
314 | else | |
315 | scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth); | |
316 | } else | |
317 | tag = 0; | |
318 | ||
319 | return tag; | |
320 | } | |
321 | ||
322 | ||
323 | /** | |
324 | * pmcraid_init_cmdblk - initializes a command block | |
325 | * | |
326 | * @cmd: pointer to struct pmcraid_cmd to be initialized | |
327 | * @index: if >=0 first time initialization; otherwise reinitialization | |
328 | * | |
329 | * Return Value | |
330 | * None | |
331 | */ | |
332 | void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index) | |
333 | { | |
334 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); | |
335 | dma_addr_t dma_addr = cmd->ioa_cb_bus_addr; | |
336 | ||
337 | if (index >= 0) { | |
338 | /* first time initialization (called from probe) */ | |
339 | u32 ioasa_offset = | |
340 | offsetof(struct pmcraid_control_block, ioasa); | |
341 | ||
342 | cmd->index = index; | |
343 | ioarcb->response_handle = cpu_to_le32(index << 2); | |
344 | ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr); | |
345 | ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset); | |
346 | ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa)); | |
347 | } else { | |
348 | /* re-initialization of various lengths, called once command is | |
349 | * processed by IOA | |
350 | */ | |
351 | memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN); | |
352 | ioarcb->request_flags0 = 0; | |
353 | ioarcb->request_flags1 = 0; | |
354 | ioarcb->cmd_timeout = 0; | |
355 | ioarcb->ioarcb_bus_addr &= (~0x1FULL); | |
356 | ioarcb->ioadl_bus_addr = 0; | |
357 | ioarcb->ioadl_length = 0; | |
358 | ioarcb->data_transfer_length = 0; | |
359 | ioarcb->add_cmd_param_length = 0; | |
360 | ioarcb->add_cmd_param_offset = 0; | |
361 | cmd->ioa_cb->ioasa.ioasc = 0; | |
362 | cmd->ioa_cb->ioasa.residual_data_length = 0; | |
363 | cmd->u.time_left = 0; | |
364 | } | |
365 | ||
366 | cmd->cmd_done = NULL; | |
367 | cmd->scsi_cmd = NULL; | |
368 | cmd->release = 0; | |
369 | cmd->completion_req = 0; | |
370 | cmd->dma_handle = 0; | |
371 | init_timer(&cmd->timer); | |
372 | } | |
373 | ||
374 | /** | |
375 | * pmcraid_reinit_cmdblk - reinitialize a command block | |
376 | * | |
377 | * @cmd: pointer to struct pmcraid_cmd to be reinitialized | |
378 | * | |
379 | * Return Value | |
380 | * None | |
381 | */ | |
382 | static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd) | |
383 | { | |
384 | pmcraid_init_cmdblk(cmd, -1); | |
385 | } | |
386 | ||
387 | /** | |
388 | * pmcraid_get_free_cmd - get a free cmd block from command block pool | |
389 | * @pinstance: adapter instance structure | |
390 | * | |
391 | * Return Value: | |
392 | * returns pointer to cmd block or NULL if no blocks are available | |
393 | */ | |
394 | static struct pmcraid_cmd *pmcraid_get_free_cmd( | |
395 | struct pmcraid_instance *pinstance | |
396 | ) | |
397 | { | |
398 | struct pmcraid_cmd *cmd = NULL; | |
399 | unsigned long lock_flags; | |
400 | ||
401 | /* free cmd block list is protected by free_pool_lock */ | |
402 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); | |
403 | ||
404 | if (!list_empty(&pinstance->free_cmd_pool)) { | |
405 | cmd = list_entry(pinstance->free_cmd_pool.next, | |
406 | struct pmcraid_cmd, free_list); | |
407 | list_del(&cmd->free_list); | |
408 | } | |
409 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); | |
410 | ||
411 | /* Initialize the command block before giving it the caller */ | |
412 | if (cmd != NULL) | |
413 | pmcraid_reinit_cmdblk(cmd); | |
414 | return cmd; | |
415 | } | |
416 | ||
417 | /** | |
418 | * pmcraid_return_cmd - return a completed command block back into free pool | |
419 | * @cmd: pointer to the command block | |
420 | * | |
421 | * Return Value: | |
422 | * nothing | |
423 | */ | |
424 | void pmcraid_return_cmd(struct pmcraid_cmd *cmd) | |
425 | { | |
426 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
427 | unsigned long lock_flags; | |
428 | ||
429 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); | |
430 | list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool); | |
431 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); | |
432 | } | |
433 | ||
434 | /** | |
435 | * pmcraid_read_interrupts - reads IOA interrupts | |
436 | * | |
437 | * @pinstance: pointer to adapter instance structure | |
438 | * | |
439 | * Return value | |
440 | * interrupts read from IOA | |
441 | */ | |
442 | static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance) | |
443 | { | |
444 | return ioread32(pinstance->int_regs.ioa_host_interrupt_reg); | |
445 | } | |
446 | ||
447 | /** | |
448 | * pmcraid_disable_interrupts - Masks and clears all specified interrupts | |
449 | * | |
450 | * @pinstance: pointer to per adapter instance structure | |
451 | * @intrs: interrupts to disable | |
452 | * | |
453 | * Return Value | |
454 | * None | |
455 | */ | |
456 | static void pmcraid_disable_interrupts( | |
457 | struct pmcraid_instance *pinstance, | |
458 | u32 intrs | |
459 | ) | |
460 | { | |
461 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); | |
462 | u32 nmask = gmask | GLOBAL_INTERRUPT_MASK; | |
463 | ||
464 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); | |
465 | iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg); | |
466 | iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg); | |
467 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); | |
468 | } | |
469 | ||
470 | /** | |
471 | * pmcraid_enable_interrupts - Enables specified interrupts | |
472 | * | |
473 | * @pinstance: pointer to per adapter instance structure | |
474 | * @intr: interrupts to enable | |
475 | * | |
476 | * Return Value | |
477 | * None | |
478 | */ | |
479 | static void pmcraid_enable_interrupts( | |
480 | struct pmcraid_instance *pinstance, | |
481 | u32 intrs | |
482 | ) | |
483 | { | |
484 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); | |
485 | u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK); | |
486 | ||
487 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); | |
488 | iowrite32(~intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg); | |
489 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); | |
490 | ||
491 | pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n", | |
492 | ioread32(pinstance->int_regs.global_interrupt_mask_reg), | |
493 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg)); | |
494 | } | |
495 | ||
496 | /** | |
497 | * pmcraid_reset_type - Determine the required reset type | |
498 | * @pinstance: pointer to adapter instance structure | |
499 | * | |
500 | * IOA requires hard reset if any of the following conditions is true. | |
501 | * 1. If HRRQ valid interrupt is not masked | |
502 | * 2. IOA reset alert doorbell is set | |
503 | * 3. If there are any error interrupts | |
504 | */ | |
505 | static void pmcraid_reset_type(struct pmcraid_instance *pinstance) | |
506 | { | |
507 | u32 mask; | |
508 | u32 intrs; | |
509 | u32 alerts; | |
510 | ||
511 | mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); | |
512 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); | |
513 | alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); | |
514 | ||
515 | if ((mask & INTRS_HRRQ_VALID) == 0 || | |
516 | (alerts & DOORBELL_IOA_RESET_ALERT) || | |
517 | (intrs & PMCRAID_ERROR_INTERRUPTS)) { | |
518 | pmcraid_info("IOA requires hard reset\n"); | |
519 | pinstance->ioa_hard_reset = 1; | |
520 | } | |
521 | ||
522 | /* If unit check is active, trigger the dump */ | |
523 | if (intrs & INTRS_IOA_UNIT_CHECK) | |
524 | pinstance->ioa_unit_check = 1; | |
525 | } | |
526 | ||
527 | /** | |
528 | * pmcraid_bist_done - completion function for PCI BIST | |
529 | * @cmd: pointer to reset command | |
530 | * Return Value | |
531 | * none | |
532 | */ | |
533 | ||
534 | static void pmcraid_ioa_reset(struct pmcraid_cmd *); | |
535 | ||
536 | static void pmcraid_bist_done(struct pmcraid_cmd *cmd) | |
537 | { | |
538 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
539 | unsigned long lock_flags; | |
540 | int rc; | |
541 | u16 pci_reg; | |
542 | ||
543 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); | |
544 | ||
545 | /* If PCI config space can't be accessed wait for another two secs */ | |
546 | if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) && | |
547 | cmd->u.time_left > 0) { | |
548 | pmcraid_info("BIST not complete, waiting another 2 secs\n"); | |
549 | cmd->timer.expires = jiffies + cmd->u.time_left; | |
550 | cmd->u.time_left = 0; | |
551 | cmd->timer.data = (unsigned long)cmd; | |
552 | cmd->timer.function = | |
553 | (void (*)(unsigned long))pmcraid_bist_done; | |
554 | add_timer(&cmd->timer); | |
555 | } else { | |
556 | cmd->u.time_left = 0; | |
557 | pmcraid_info("BIST is complete, proceeding with reset\n"); | |
558 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
559 | pmcraid_ioa_reset(cmd); | |
560 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
561 | } | |
562 | } | |
563 | ||
564 | /** | |
565 | * pmcraid_start_bist - starts BIST | |
566 | * @cmd: pointer to reset cmd | |
567 | * Return Value | |
568 | * none | |
569 | */ | |
570 | static void pmcraid_start_bist(struct pmcraid_cmd *cmd) | |
571 | { | |
572 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
573 | u32 doorbells, intrs; | |
574 | ||
575 | /* proceed with bist and wait for 2 seconds */ | |
576 | iowrite32(DOORBELL_IOA_START_BIST, | |
577 | pinstance->int_regs.host_ioa_interrupt_reg); | |
578 | doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); | |
579 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); | |
580 | pmcraid_info("doorbells after start bist: %x intrs: %x \n", | |
581 | doorbells, intrs); | |
582 | ||
583 | cmd->u.time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); | |
584 | cmd->timer.data = (unsigned long)cmd; | |
585 | cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); | |
586 | cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done; | |
587 | add_timer(&cmd->timer); | |
588 | } | |
589 | ||
590 | /** | |
591 | * pmcraid_reset_alert_done - completion routine for reset_alert | |
592 | * @cmd: pointer to command block used in reset sequence | |
593 | * Return value | |
594 | * None | |
595 | */ | |
596 | static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd) | |
597 | { | |
598 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
599 | u32 status = ioread32(pinstance->ioa_status); | |
600 | unsigned long lock_flags; | |
601 | ||
602 | /* if the critical operation in progress bit is set or the wait times | |
603 | * out, invoke reset engine to proceed with hard reset. If there is | |
604 | * some more time to wait, restart the timer | |
605 | */ | |
606 | if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) || | |
607 | cmd->u.time_left <= 0) { | |
608 | pmcraid_info("critical op is reset proceeding with reset\n"); | |
609 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
610 | pmcraid_ioa_reset(cmd); | |
611 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
612 | } else { | |
613 | pmcraid_info("critical op is not yet reset waiting again\n"); | |
614 | /* restart timer if some more time is available to wait */ | |
615 | cmd->u.time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT; | |
616 | cmd->timer.data = (unsigned long)cmd; | |
617 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; | |
618 | cmd->timer.function = | |
619 | (void (*)(unsigned long))pmcraid_reset_alert_done; | |
620 | add_timer(&cmd->timer); | |
621 | } | |
622 | } | |
623 | ||
624 | /** | |
625 | * pmcraid_reset_alert - alerts IOA for a possible reset | |
626 | * @cmd : command block to be used for reset sequence. | |
627 | * | |
628 | * Return Value | |
629 | * returns 0 if pci config-space is accessible and RESET_DOORBELL is | |
630 | * successfully written to IOA. Returns non-zero in case pci_config_space | |
631 | * is not accessible | |
632 | */ | |
633 | static void pmcraid_reset_alert(struct pmcraid_cmd *cmd) | |
634 | { | |
635 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
636 | u32 doorbells; | |
637 | int rc; | |
638 | u16 pci_reg; | |
639 | ||
640 | /* If we are able to access IOA PCI config space, alert IOA that we are | |
641 | * going to reset it soon. This enables IOA to preserv persistent error | |
642 | * data if any. In case memory space is not accessible, proceed with | |
643 | * BIST or slot_reset | |
644 | */ | |
645 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); | |
646 | if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) { | |
647 | ||
648 | /* wait for IOA permission i.e until CRITICAL_OPERATION bit is | |
649 | * reset IOA doesn't generate any interrupts when CRITICAL | |
650 | * OPERATION bit is reset. A timer is started to wait for this | |
651 | * bit to be reset. | |
652 | */ | |
653 | cmd->u.time_left = PMCRAID_RESET_TIMEOUT; | |
654 | cmd->timer.data = (unsigned long)cmd; | |
655 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; | |
656 | cmd->timer.function = | |
657 | (void (*)(unsigned long))pmcraid_reset_alert_done; | |
658 | add_timer(&cmd->timer); | |
659 | ||
660 | iowrite32(DOORBELL_IOA_RESET_ALERT, | |
661 | pinstance->int_regs.host_ioa_interrupt_reg); | |
662 | doorbells = | |
663 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); | |
664 | pmcraid_info("doorbells after reset alert: %x\n", doorbells); | |
665 | } else { | |
666 | pmcraid_info("PCI config is not accessible starting BIST\n"); | |
667 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; | |
668 | pmcraid_start_bist(cmd); | |
669 | } | |
670 | } | |
671 | ||
672 | /** | |
673 | * pmcraid_timeout_handler - Timeout handler for internally generated ops | |
674 | * | |
675 | * @cmd : pointer to command structure, that got timedout | |
676 | * | |
677 | * This function blocks host requests and initiates an adapter reset. | |
678 | * | |
679 | * Return value: | |
680 | * None | |
681 | */ | |
682 | static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd) | |
683 | { | |
684 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
685 | unsigned long lock_flags; | |
686 | ||
687 | dev_err(&pinstance->pdev->dev, | |
688 | "Adapter being reset due to command timeout.\n"); | |
689 | ||
690 | /* Command timeouts result in hard reset sequence. The command that got | |
691 | * timed out may be the one used as part of reset sequence. In this | |
692 | * case restart reset sequence using the same command block even if | |
693 | * reset is in progress. Otherwise fail this command and get a free | |
694 | * command block to restart the reset sequence. | |
695 | */ | |
696 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
697 | if (!pinstance->ioa_reset_in_progress) { | |
698 | pinstance->ioa_reset_attempts = 0; | |
699 | cmd = pmcraid_get_free_cmd(pinstance); | |
700 | ||
701 | /* If we are out of command blocks, just return here itself. | |
702 | * Some other command's timeout handler can do the reset job | |
703 | */ | |
704 | if (cmd == NULL) { | |
705 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
706 | lock_flags); | |
707 | pmcraid_err("no free cmnd block for timeout handler\n"); | |
708 | return; | |
709 | } | |
710 | ||
711 | pinstance->reset_cmd = cmd; | |
712 | pinstance->ioa_reset_in_progress = 1; | |
713 | } else { | |
714 | pmcraid_info("reset is already in progress\n"); | |
715 | ||
716 | if (pinstance->reset_cmd != cmd) { | |
717 | /* This command should have been given to IOA, this | |
718 | * command will be completed by fail_outstanding_cmds | |
719 | * anyway | |
720 | */ | |
721 | pmcraid_err("cmd is pending but reset in progress\n"); | |
722 | } | |
723 | ||
724 | /* If this command was being used as part of the reset | |
725 | * sequence, set cmd_done pointer to pmcraid_ioa_reset. This | |
726 | * causes fail_outstanding_commands not to return the command | |
727 | * block back to free pool | |
728 | */ | |
729 | if (cmd == pinstance->reset_cmd) | |
730 | cmd->cmd_done = pmcraid_ioa_reset; | |
731 | ||
732 | } | |
733 | ||
734 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; | |
735 | scsi_block_requests(pinstance->host); | |
736 | pmcraid_reset_alert(cmd); | |
737 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
738 | } | |
739 | ||
740 | /** | |
741 | * pmcraid_internal_done - completion routine for internally generated cmds | |
742 | * | |
743 | * @cmd: command that got response from IOA | |
744 | * | |
745 | * Return Value: | |
746 | * none | |
747 | */ | |
748 | static void pmcraid_internal_done(struct pmcraid_cmd *cmd) | |
749 | { | |
750 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", | |
751 | cmd->ioa_cb->ioarcb.cdb[0], | |
752 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); | |
753 | ||
754 | /* Some of the internal commands are sent with callers blocking for the | |
755 | * response. Same will be indicated as part of cmd->completion_req | |
756 | * field. Response path needs to wake up any waiters waiting for cmd | |
757 | * completion if this flag is set. | |
758 | */ | |
759 | if (cmd->completion_req) { | |
760 | cmd->completion_req = 0; | |
761 | complete(&cmd->wait_for_completion); | |
762 | } | |
763 | ||
764 | /* most of the internal commands are completed by caller itself, so | |
765 | * no need to return the command block back to free pool until we are | |
766 | * required to do so (e.g once done with initialization). | |
767 | */ | |
768 | if (cmd->release) { | |
769 | cmd->release = 0; | |
770 | pmcraid_return_cmd(cmd); | |
771 | } | |
772 | } | |
773 | ||
774 | /** | |
775 | * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization | |
776 | * | |
777 | * @cmd: command that got response from IOA | |
778 | * | |
779 | * This routine is called after driver re-reads configuration table due to a | |
780 | * lost CCN. It returns the command block back to free pool and schedules | |
781 | * worker thread to add/delete devices into the system. | |
782 | * | |
783 | * Return Value: | |
784 | * none | |
785 | */ | |
786 | static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd) | |
787 | { | |
788 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", | |
789 | cmd->ioa_cb->ioarcb.cdb[0], | |
790 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); | |
791 | ||
792 | if (cmd->release) { | |
793 | cmd->release = 0; | |
794 | pmcraid_return_cmd(cmd); | |
795 | } | |
796 | pmcraid_info("scheduling worker for config table reinitialization\n"); | |
797 | schedule_work(&cmd->drv_inst->worker_q); | |
798 | } | |
799 | ||
800 | /** | |
801 | * pmcraid_erp_done - Process completion of SCSI error response from device | |
802 | * @cmd: pmcraid_command | |
803 | * | |
804 | * This function copies the sense buffer into the scsi_cmd struct and completes | |
805 | * scsi_cmd by calling scsi_done function. | |
806 | * | |
807 | * Return value: | |
808 | * none | |
809 | */ | |
810 | static void pmcraid_erp_done(struct pmcraid_cmd *cmd) | |
811 | { | |
812 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; | |
813 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
814 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); | |
815 | ||
816 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) { | |
817 | scsi_cmd->result |= (DID_ERROR << 16); | |
818 | pmcraid_err("command CDB[0] = %x failed with IOASC: 0x%08X\n", | |
819 | cmd->ioa_cb->ioarcb.cdb[0], ioasc); | |
820 | } | |
821 | ||
822 | /* if we had allocated sense buffers for request sense, copy the sense | |
823 | * release the buffers | |
824 | */ | |
825 | if (cmd->sense_buffer != NULL) { | |
826 | memcpy(scsi_cmd->sense_buffer, | |
827 | cmd->sense_buffer, | |
828 | SCSI_SENSE_BUFFERSIZE); | |
829 | pci_free_consistent(pinstance->pdev, | |
830 | SCSI_SENSE_BUFFERSIZE, | |
831 | cmd->sense_buffer, cmd->sense_buffer_dma); | |
832 | cmd->sense_buffer = NULL; | |
833 | cmd->sense_buffer_dma = 0; | |
834 | } | |
835 | ||
836 | scsi_dma_unmap(scsi_cmd); | |
837 | pmcraid_return_cmd(cmd); | |
838 | scsi_cmd->scsi_done(scsi_cmd); | |
839 | } | |
840 | ||
841 | /** | |
842 | * pmcraid_fire_command - sends an IOA command to adapter | |
843 | * | |
844 | * This function adds the given block into pending command list | |
845 | * and returns without waiting | |
846 | * | |
847 | * @cmd : command to be sent to the device | |
848 | * | |
849 | * Return Value | |
850 | * None | |
851 | */ | |
852 | static void _pmcraid_fire_command(struct pmcraid_cmd *cmd) | |
853 | { | |
854 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
855 | unsigned long lock_flags; | |
856 | ||
857 | /* Add this command block to pending cmd pool. We do this prior to | |
858 | * writting IOARCB to ioarrin because IOA might complete the command | |
859 | * by the time we are about to add it to the list. Response handler | |
860 | * (isr/tasklet) looks for cmb block in the pending pending list. | |
861 | */ | |
862 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); | |
863 | list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool); | |
864 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); | |
865 | atomic_inc(&pinstance->outstanding_cmds); | |
866 | ||
867 | /* driver writes lower 32-bit value of IOARCB address only */ | |
868 | mb(); | |
869 | iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr), | |
870 | pinstance->ioarrin); | |
871 | } | |
872 | ||
873 | /** | |
874 | * pmcraid_send_cmd - fires a command to IOA | |
875 | * | |
876 | * This function also sets up timeout function, and command completion | |
877 | * function | |
878 | * | |
879 | * @cmd: pointer to the command block to be fired to IOA | |
880 | * @cmd_done: command completion function, called once IOA responds | |
881 | * @timeout: timeout to wait for this command completion | |
882 | * @timeout_func: timeout handler | |
883 | * | |
884 | * Return value | |
885 | * none | |
886 | */ | |
887 | static void pmcraid_send_cmd( | |
888 | struct pmcraid_cmd *cmd, | |
889 | void (*cmd_done) (struct pmcraid_cmd *), | |
890 | unsigned long timeout, | |
891 | void (*timeout_func) (struct pmcraid_cmd *) | |
892 | ) | |
893 | { | |
894 | /* initialize done function */ | |
895 | cmd->cmd_done = cmd_done; | |
896 | ||
897 | if (timeout_func) { | |
898 | /* setup timeout handler */ | |
899 | cmd->timer.data = (unsigned long)cmd; | |
900 | cmd->timer.expires = jiffies + timeout; | |
901 | cmd->timer.function = (void (*)(unsigned long))timeout_func; | |
902 | add_timer(&cmd->timer); | |
903 | } | |
904 | ||
905 | /* fire the command to IOA */ | |
906 | _pmcraid_fire_command(cmd); | |
907 | } | |
908 | ||
909 | /** | |
910 | * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa | |
911 | * | |
912 | * @cmd: pointer to the command block used as part of reset sequence | |
913 | * | |
914 | * Return Value | |
915 | * None | |
916 | */ | |
917 | static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd) | |
918 | { | |
919 | pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n", | |
920 | cmd->ioa_cb->ioarcb.cdb[0], | |
921 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); | |
922 | ||
923 | /* Note that commands sent during reset require next command to be sent | |
924 | * to IOA. Hence reinit the done function as well as timeout function | |
925 | */ | |
926 | pmcraid_reinit_cmdblk(cmd); | |
927 | cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD; | |
928 | cmd->ioa_cb->ioarcb.resource_handle = | |
929 | cpu_to_le32(PMCRAID_IOA_RES_HANDLE); | |
930 | cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN; | |
931 | cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL; | |
932 | ||
933 | /* fire shutdown command to hardware. */ | |
934 | pmcraid_info("firing normal shutdown command (%d) to IOA\n", | |
935 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle)); | |
936 | ||
937 | pmcraid_send_cmd(cmd, pmcraid_ioa_reset, | |
938 | PMCRAID_SHUTDOWN_TIMEOUT, | |
939 | pmcraid_timeout_handler); | |
940 | } | |
941 | ||
942 | /** | |
943 | * pmcraid_identify_hrrq - registers host rrq buffers with IOA | |
944 | * @cmd: pointer to command block to be used for identify hrrq | |
945 | * | |
946 | * Return Value | |
947 | * 0 in case of success, otherwise non-zero failure code | |
948 | */ | |
949 | ||
950 | static void pmcraid_querycfg(struct pmcraid_cmd *); | |
951 | ||
952 | static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd) | |
953 | { | |
954 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
955 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; | |
956 | int index = 0; | |
957 | __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]); | |
958 | u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD); | |
959 | ||
960 | pmcraid_reinit_cmdblk(cmd); | |
961 | ||
962 | /* Initialize ioarcb */ | |
963 | ioarcb->request_type = REQ_TYPE_IOACMD; | |
964 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); | |
965 | ||
966 | /* initialize the hrrq number where IOA will respond to this command */ | |
967 | ioarcb->hrrq_id = index; | |
968 | ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ; | |
969 | ioarcb->cdb[1] = index; | |
970 | ||
971 | /* IOA expects 64-bit pci address to be written in B.E format | |
972 | * (i.e cdb[2]=MSByte..cdb[9]=LSB. | |
973 | */ | |
974 | pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb => %llx:%llx\n", | |
975 | hrrq_addr, ioarcb->ioarcb_bus_addr); | |
976 | ||
977 | memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr)); | |
978 | memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size)); | |
979 | ||
980 | /* Subsequent commands require HRRQ identification to be successful. | |
981 | * Note that this gets called even during reset from SCSI mid-layer | |
982 | * or tasklet | |
983 | */ | |
984 | pmcraid_send_cmd(cmd, pmcraid_querycfg, | |
985 | PMCRAID_INTERNAL_TIMEOUT, | |
986 | pmcraid_timeout_handler); | |
987 | } | |
988 | ||
989 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd); | |
990 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd); | |
991 | ||
992 | /** | |
993 | * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA | |
994 | * | |
995 | * @cmd: initialized command block pointer | |
996 | * | |
997 | * Return Value | |
998 | * none | |
999 | */ | |
1000 | static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd) | |
1001 | { | |
1002 | if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE) | |
1003 | atomic_set(&(cmd->drv_inst->ccn.ignore), 0); | |
1004 | else | |
1005 | atomic_set(&(cmd->drv_inst->ldn.ignore), 0); | |
1006 | ||
1007 | pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL); | |
1008 | } | |
1009 | ||
1010 | /** | |
1011 | * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA | |
1012 | * | |
1013 | * @pinstance: pointer to adapter instance structure | |
1014 | * @type: HCAM type | |
1015 | * | |
1016 | * Return Value | |
1017 | * pointer to initialized pmcraid_cmd structure or NULL | |
1018 | */ | |
1019 | static struct pmcraid_cmd *pmcraid_init_hcam | |
1020 | ( | |
1021 | struct pmcraid_instance *pinstance, | |
1022 | u8 type | |
1023 | ) | |
1024 | { | |
1025 | struct pmcraid_cmd *cmd; | |
1026 | struct pmcraid_ioarcb *ioarcb; | |
1027 | struct pmcraid_ioadl_desc *ioadl; | |
1028 | struct pmcraid_hostrcb *hcam; | |
1029 | void (*cmd_done) (struct pmcraid_cmd *); | |
1030 | dma_addr_t dma; | |
1031 | int rcb_size; | |
1032 | ||
1033 | cmd = pmcraid_get_free_cmd(pinstance); | |
1034 | ||
1035 | if (!cmd) { | |
1036 | pmcraid_err("no free command blocks for hcam\n"); | |
1037 | return cmd; | |
1038 | } | |
1039 | ||
1040 | if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) { | |
1041 | rcb_size = sizeof(struct pmcraid_hcam_ccn); | |
1042 | cmd_done = pmcraid_process_ccn; | |
1043 | dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE; | |
1044 | hcam = &pinstance->ccn; | |
1045 | } else { | |
1046 | rcb_size = sizeof(struct pmcraid_hcam_ldn); | |
1047 | cmd_done = pmcraid_process_ldn; | |
1048 | dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE; | |
1049 | hcam = &pinstance->ldn; | |
1050 | } | |
1051 | ||
1052 | /* initialize command pointer used for HCAM registration */ | |
1053 | hcam->cmd = cmd; | |
1054 | ||
1055 | ioarcb = &cmd->ioa_cb->ioarcb; | |
1056 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + | |
1057 | offsetof(struct pmcraid_ioarcb, | |
1058 | add_data.u.ioadl[0])); | |
1059 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); | |
1060 | ioadl = ioarcb->add_data.u.ioadl; | |
1061 | ||
1062 | /* Initialize ioarcb */ | |
1063 | ioarcb->request_type = REQ_TYPE_HCAM; | |
1064 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); | |
1065 | ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC; | |
1066 | ioarcb->cdb[1] = type; | |
1067 | ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF; | |
1068 | ioarcb->cdb[8] = (rcb_size) & 0xFF; | |
1069 | ||
1070 | ioarcb->data_transfer_length = cpu_to_le32(rcb_size); | |
1071 | ||
1072 | ioadl[0].flags |= cpu_to_le32(IOADL_FLAGS_READ_LAST); | |
1073 | ioadl[0].data_len = cpu_to_le32(rcb_size); | |
1074 | ioadl[0].address = cpu_to_le32(dma); | |
1075 | ||
1076 | cmd->cmd_done = cmd_done; | |
1077 | return cmd; | |
1078 | } | |
1079 | ||
1080 | /** | |
1081 | * pmcraid_send_hcam - Send an HCAM to IOA | |
1082 | * @pinstance: ioa config struct | |
1083 | * @type: HCAM type | |
1084 | * | |
1085 | * This function will send a Host Controlled Async command to IOA. | |
1086 | * | |
1087 | * Return value: | |
1088 | * none | |
1089 | */ | |
1090 | static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type) | |
1091 | { | |
1092 | struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type); | |
1093 | pmcraid_send_hcam_cmd(cmd); | |
1094 | } | |
1095 | ||
1096 | ||
1097 | /** | |
1098 | * pmcraid_prepare_cancel_cmd - prepares a command block to abort another | |
1099 | * | |
1100 | * @cmd: pointer to cmd that is used as cancelling command | |
1101 | * @cmd_to_cancel: pointer to the command that needs to be cancelled | |
1102 | */ | |
1103 | static void pmcraid_prepare_cancel_cmd( | |
1104 | struct pmcraid_cmd *cmd, | |
1105 | struct pmcraid_cmd *cmd_to_cancel | |
1106 | ) | |
1107 | { | |
1108 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; | |
1109 | __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr; | |
1110 | ||
1111 | /* Get the resource handle to where the command to be aborted has been | |
1112 | * sent. | |
1113 | */ | |
1114 | ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle; | |
1115 | ioarcb->request_type = REQ_TYPE_IOACMD; | |
1116 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); | |
1117 | ioarcb->cdb[0] = PMCRAID_ABORT_CMD; | |
1118 | ||
1119 | /* IOARCB address of the command to be cancelled is given in | |
1120 | * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in | |
1121 | * IOARCB address are not masked. | |
1122 | */ | |
1123 | ioarcb_addr = cpu_to_be64(ioarcb_addr); | |
1124 | memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr)); | |
1125 | } | |
1126 | ||
1127 | /** | |
1128 | * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM | |
1129 | * | |
1130 | * @cmd: command to be used as cancelling command | |
1131 | * @type: HCAM type | |
1132 | * @cmd_done: op done function for the cancelling command | |
1133 | */ | |
1134 | static void pmcraid_cancel_hcam( | |
1135 | struct pmcraid_cmd *cmd, | |
1136 | u8 type, | |
1137 | void (*cmd_done) (struct pmcraid_cmd *) | |
1138 | ) | |
1139 | { | |
1140 | struct pmcraid_instance *pinstance; | |
1141 | struct pmcraid_hostrcb *hcam; | |
1142 | ||
1143 | pinstance = cmd->drv_inst; | |
1144 | hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ? | |
1145 | &pinstance->ldn : &pinstance->ccn; | |
1146 | ||
1147 | /* prepare for cancelling previous hcam command. If the HCAM is | |
1148 | * currently not pending with IOA, we would have hcam->cmd as non-null | |
1149 | */ | |
1150 | if (hcam->cmd == NULL) | |
1151 | return; | |
1152 | ||
1153 | pmcraid_prepare_cancel_cmd(cmd, hcam->cmd); | |
1154 | ||
1155 | /* writing to IOARRIN must be protected by host_lock, as mid-layer | |
1156 | * schedule queuecommand while we are doing this | |
1157 | */ | |
1158 | pmcraid_send_cmd(cmd, cmd_done, | |
1159 | PMCRAID_INTERNAL_TIMEOUT, | |
1160 | pmcraid_timeout_handler); | |
1161 | } | |
1162 | ||
1163 | /** | |
1164 | * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA | |
1165 | * | |
1166 | * @cmd: command block to be used for cancelling the HCAM | |
1167 | */ | |
1168 | static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd) | |
1169 | { | |
1170 | pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n", | |
1171 | cmd->ioa_cb->ioarcb.cdb[0], | |
1172 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); | |
1173 | ||
1174 | pmcraid_reinit_cmdblk(cmd); | |
1175 | ||
1176 | pmcraid_cancel_hcam(cmd, | |
1177 | PMCRAID_HCAM_CODE_CONFIG_CHANGE, | |
1178 | pmcraid_ioa_shutdown); | |
1179 | } | |
1180 | ||
1181 | /** | |
1182 | * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA | |
1183 | * | |
1184 | * @cmd: command block to be used for cancelling the HCAM | |
1185 | */ | |
1186 | static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd) | |
1187 | { | |
1188 | pmcraid_cancel_hcam(cmd, | |
1189 | PMCRAID_HCAM_CODE_LOG_DATA, | |
1190 | pmcraid_cancel_ccn); | |
1191 | } | |
1192 | ||
1193 | /** | |
1194 | * pmcraid_expose_resource - check if the resource can be exposed to OS | |
1195 | * | |
1196 | * @cfgte: pointer to configuration table entry of the resource | |
1197 | * | |
1198 | * Return value: | |
1199 | * true if resource can be added to midlayer, false(0) otherwise | |
1200 | */ | |
1201 | static int pmcraid_expose_resource(struct pmcraid_config_table_entry *cfgte) | |
1202 | { | |
1203 | int retval = 0; | |
1204 | ||
1205 | if (cfgte->resource_type == RES_TYPE_VSET) | |
1206 | retval = ((cfgte->unique_flags1 & 0xFF) < 0xFE); | |
1207 | else if (cfgte->resource_type == RES_TYPE_GSCSI) | |
1208 | retval = (RES_BUS(cfgte->resource_address) != | |
1209 | PMCRAID_VIRTUAL_ENCL_BUS_ID); | |
1210 | return retval; | |
1211 | } | |
1212 | ||
1213 | /* attributes supported by pmcraid_event_family */ | |
1214 | enum { | |
1215 | PMCRAID_AEN_ATTR_UNSPEC, | |
1216 | PMCRAID_AEN_ATTR_EVENT, | |
1217 | __PMCRAID_AEN_ATTR_MAX, | |
1218 | }; | |
1219 | #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1) | |
1220 | ||
1221 | /* commands supported by pmcraid_event_family */ | |
1222 | enum { | |
1223 | PMCRAID_AEN_CMD_UNSPEC, | |
1224 | PMCRAID_AEN_CMD_EVENT, | |
1225 | __PMCRAID_AEN_CMD_MAX, | |
1226 | }; | |
1227 | #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1) | |
1228 | ||
1229 | static struct genl_family pmcraid_event_family = { | |
1230 | .id = GENL_ID_GENERATE, | |
1231 | .name = "pmcraid", | |
1232 | .version = 1, | |
1233 | .maxattr = PMCRAID_AEN_ATTR_MAX | |
1234 | }; | |
1235 | ||
1236 | /** | |
1237 | * pmcraid_netlink_init - registers pmcraid_event_family | |
1238 | * | |
1239 | * Return value: | |
1240 | * 0 if the pmcraid_event_family is successfully registered | |
1241 | * with netlink generic, non-zero otherwise | |
1242 | */ | |
1243 | static int pmcraid_netlink_init(void) | |
1244 | { | |
1245 | int result; | |
1246 | ||
1247 | result = genl_register_family(&pmcraid_event_family); | |
1248 | ||
1249 | if (result) | |
1250 | return result; | |
1251 | ||
1252 | pmcraid_info("registered NETLINK GENERIC group: %d\n", | |
1253 | pmcraid_event_family.id); | |
1254 | ||
1255 | return result; | |
1256 | } | |
1257 | ||
1258 | /** | |
1259 | * pmcraid_netlink_release - unregisters pmcraid_event_family | |
1260 | * | |
1261 | * Return value: | |
1262 | * none | |
1263 | */ | |
1264 | static void pmcraid_netlink_release(void) | |
1265 | { | |
1266 | genl_unregister_family(&pmcraid_event_family); | |
1267 | } | |
1268 | ||
1269 | /** | |
1270 | * pmcraid_notify_aen - sends event msg to user space application | |
1271 | * @pinstance: pointer to adapter instance structure | |
1272 | * @type: HCAM type | |
1273 | * | |
1274 | * Return value: | |
1275 | * 0 if success, error value in case of any failure. | |
1276 | */ | |
1277 | static int pmcraid_notify_aen(struct pmcraid_instance *pinstance, u8 type) | |
1278 | { | |
1279 | struct sk_buff *skb; | |
1280 | struct pmcraid_aen_msg *aen_msg; | |
1281 | void *msg_header; | |
1282 | int data_size, total_size; | |
1283 | int result; | |
1284 | ||
1285 | ||
1286 | if (type == PMCRAID_HCAM_CODE_LOG_DATA) { | |
1287 | aen_msg = pinstance->ldn.msg; | |
1288 | data_size = pinstance->ldn.hcam->data_len; | |
1289 | } else { | |
1290 | aen_msg = pinstance->ccn.msg; | |
1291 | data_size = pinstance->ccn.hcam->data_len; | |
1292 | } | |
1293 | ||
1294 | data_size += sizeof(struct pmcraid_hcam_hdr); | |
1295 | aen_msg->hostno = (pinstance->host->unique_id << 16 | | |
1296 | MINOR(pinstance->cdev.dev)); | |
1297 | aen_msg->length = data_size; | |
1298 | data_size += sizeof(*aen_msg); | |
1299 | ||
1300 | total_size = nla_total_size(data_size); | |
1301 | skb = genlmsg_new(total_size, GFP_ATOMIC); | |
1302 | ||
1303 | ||
1304 | if (!skb) { | |
1305 | pmcraid_err("Failed to allocate aen data SKB of size: %x\n", | |
1306 | total_size); | |
1307 | return -ENOMEM; | |
1308 | } | |
1309 | ||
1310 | /* add the genetlink message header */ | |
1311 | msg_header = genlmsg_put(skb, 0, 0, | |
1312 | &pmcraid_event_family, 0, | |
1313 | PMCRAID_AEN_CMD_EVENT); | |
1314 | if (!msg_header) { | |
1315 | pmcraid_err("failed to copy command details\n"); | |
1316 | nlmsg_free(skb); | |
1317 | return -ENOMEM; | |
1318 | } | |
1319 | ||
1320 | result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg); | |
1321 | ||
1322 | if (result) { | |
1323 | pmcraid_err("failed to copy AEN attribute data \n"); | |
1324 | nlmsg_free(skb); | |
1325 | return -EINVAL; | |
1326 | } | |
1327 | ||
1328 | /* send genetlink multicast message to notify appplications */ | |
1329 | result = genlmsg_end(skb, msg_header); | |
1330 | ||
1331 | if (result < 0) { | |
1332 | pmcraid_err("genlmsg_end failed\n"); | |
1333 | nlmsg_free(skb); | |
1334 | return result; | |
1335 | } | |
1336 | ||
1337 | result = | |
1338 | genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC); | |
1339 | ||
1340 | /* If there are no listeners, genlmsg_multicast may return non-zero | |
1341 | * value. | |
1342 | */ | |
1343 | if (result) | |
1344 | pmcraid_info("failed to send %s event message %x!\n", | |
1345 | type == PMCRAID_HCAM_CODE_LOG_DATA ? "LDN" : "CCN", | |
1346 | result); | |
1347 | return result; | |
1348 | } | |
1349 | ||
1350 | /** | |
1351 | * pmcraid_handle_config_change - Handle a config change from the adapter | |
1352 | * @pinstance: pointer to per adapter instance structure | |
1353 | * | |
1354 | * Return value: | |
1355 | * none | |
1356 | */ | |
1357 | static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance) | |
1358 | { | |
1359 | struct pmcraid_config_table_entry *cfg_entry; | |
1360 | struct pmcraid_hcam_ccn *ccn_hcam; | |
1361 | struct pmcraid_cmd *cmd; | |
1362 | struct pmcraid_cmd *cfgcmd; | |
1363 | struct pmcraid_resource_entry *res = NULL; | |
1364 | u32 new_entry = 1; | |
1365 | unsigned long lock_flags; | |
1366 | unsigned long host_lock_flags; | |
1367 | int rc; | |
1368 | ||
1369 | ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam; | |
1370 | cfg_entry = &ccn_hcam->cfg_entry; | |
1371 | ||
1372 | pmcraid_info | |
1373 | ("CCN(%x): %x type: %x lost: %x flags: %x res: %x:%x:%x:%x\n", | |
1374 | pinstance->ccn.hcam->ilid, | |
1375 | pinstance->ccn.hcam->op_code, | |
1376 | pinstance->ccn.hcam->notification_type, | |
1377 | pinstance->ccn.hcam->notification_lost, | |
1378 | pinstance->ccn.hcam->flags, | |
1379 | pinstance->host->unique_id, | |
1380 | RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID : | |
1381 | (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID : | |
1382 | RES_BUS(cfg_entry->resource_address)), | |
1383 | RES_IS_VSET(*cfg_entry) ? cfg_entry->unique_flags1 : | |
1384 | RES_TARGET(cfg_entry->resource_address), | |
1385 | RES_LUN(cfg_entry->resource_address)); | |
1386 | ||
1387 | ||
1388 | /* If this HCAM indicates a lost notification, read the config table */ | |
1389 | if (pinstance->ccn.hcam->notification_lost) { | |
1390 | cfgcmd = pmcraid_get_free_cmd(pinstance); | |
1391 | if (cfgcmd) { | |
1392 | pmcraid_info("lost CCN, reading config table\b"); | |
1393 | pinstance->reinit_cfg_table = 1; | |
1394 | pmcraid_querycfg(cfgcmd); | |
1395 | } else { | |
1396 | pmcraid_err("lost CCN, no free cmd for querycfg\n"); | |
1397 | } | |
1398 | goto out_notify_apps; | |
1399 | } | |
1400 | ||
1401 | /* If this resource is not going to be added to mid-layer, just notify | |
1402 | * applications and return | |
1403 | */ | |
1404 | if (!pmcraid_expose_resource(cfg_entry)) | |
1405 | goto out_notify_apps; | |
1406 | ||
1407 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); | |
1408 | list_for_each_entry(res, &pinstance->used_res_q, queue) { | |
1409 | rc = memcmp(&res->cfg_entry.resource_address, | |
1410 | &cfg_entry->resource_address, | |
1411 | sizeof(cfg_entry->resource_address)); | |
1412 | if (!rc) { | |
1413 | new_entry = 0; | |
1414 | break; | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | if (new_entry) { | |
1419 | ||
1420 | /* If there are more number of resources than what driver can | |
1421 | * manage, do not notify the applications about the CCN. Just | |
1422 | * ignore this notifications and re-register the same HCAM | |
1423 | */ | |
1424 | if (list_empty(&pinstance->free_res_q)) { | |
1425 | spin_unlock_irqrestore(&pinstance->resource_lock, | |
1426 | lock_flags); | |
1427 | pmcraid_err("too many resources attached\n"); | |
1428 | spin_lock_irqsave(pinstance->host->host_lock, | |
1429 | host_lock_flags); | |
1430 | pmcraid_send_hcam(pinstance, | |
1431 | PMCRAID_HCAM_CODE_CONFIG_CHANGE); | |
1432 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
1433 | host_lock_flags); | |
1434 | return; | |
1435 | } | |
1436 | ||
1437 | res = list_entry(pinstance->free_res_q.next, | |
1438 | struct pmcraid_resource_entry, queue); | |
1439 | ||
1440 | list_del(&res->queue); | |
1441 | res->scsi_dev = NULL; | |
1442 | res->reset_progress = 0; | |
1443 | list_add_tail(&res->queue, &pinstance->used_res_q); | |
1444 | } | |
1445 | ||
1446 | memcpy(&res->cfg_entry, cfg_entry, | |
1447 | sizeof(struct pmcraid_config_table_entry)); | |
1448 | ||
1449 | if (pinstance->ccn.hcam->notification_type == | |
1450 | NOTIFICATION_TYPE_ENTRY_DELETED) { | |
1451 | if (res->scsi_dev) { | |
1452 | res->change_detected = RES_CHANGE_DEL; | |
1453 | res->cfg_entry.resource_handle = | |
1454 | PMCRAID_INVALID_RES_HANDLE; | |
1455 | schedule_work(&pinstance->worker_q); | |
1456 | } else { | |
1457 | /* This may be one of the non-exposed resources */ | |
1458 | list_move_tail(&res->queue, &pinstance->free_res_q); | |
1459 | } | |
1460 | } else if (!res->scsi_dev) { | |
1461 | res->change_detected = RES_CHANGE_ADD; | |
1462 | schedule_work(&pinstance->worker_q); | |
1463 | } | |
1464 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); | |
1465 | ||
1466 | out_notify_apps: | |
1467 | ||
1468 | /* Notify configuration changes to registered applications.*/ | |
1469 | if (!pmcraid_disable_aen) | |
1470 | pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); | |
1471 | ||
1472 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); | |
1473 | if (cmd) | |
1474 | pmcraid_send_hcam_cmd(cmd); | |
1475 | } | |
1476 | ||
1477 | /** | |
1478 | * pmcraid_get_error_info - return error string for an ioasc | |
1479 | * @ioasc: ioasc code | |
1480 | * Return Value | |
1481 | * none | |
1482 | */ | |
1483 | static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc) | |
1484 | { | |
1485 | int i; | |
1486 | for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) { | |
1487 | if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc) | |
1488 | return &pmcraid_ioasc_error_table[i]; | |
1489 | } | |
1490 | return NULL; | |
1491 | } | |
1492 | ||
1493 | /** | |
1494 | * pmcraid_ioasc_logger - log IOASC information based user-settings | |
1495 | * @ioasc: ioasc code | |
1496 | * @cmd: pointer to command that resulted in 'ioasc' | |
1497 | */ | |
1498 | void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd) | |
1499 | { | |
1500 | struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc); | |
1501 | ||
1502 | if (error_info == NULL || | |
1503 | cmd->drv_inst->current_log_level < error_info->log_level) | |
1504 | return; | |
1505 | ||
1506 | /* log the error string */ | |
1507 | pmcraid_err("cmd [%d] for resource %x failed with %x(%s)\n", | |
1508 | cmd->ioa_cb->ioarcb.cdb[0], | |
1509 | cmd->ioa_cb->ioarcb.resource_handle, | |
1510 | le32_to_cpu(ioasc), error_info->error_string); | |
1511 | } | |
1512 | ||
1513 | /** | |
1514 | * pmcraid_handle_error_log - Handle a config change (error log) from the IOA | |
1515 | * | |
1516 | * @pinstance: pointer to per adapter instance structure | |
1517 | * | |
1518 | * Return value: | |
1519 | * none | |
1520 | */ | |
1521 | static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance) | |
1522 | { | |
1523 | struct pmcraid_hcam_ldn *hcam_ldn; | |
1524 | u32 ioasc; | |
1525 | ||
1526 | hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; | |
1527 | ||
1528 | pmcraid_info | |
1529 | ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n", | |
1530 | pinstance->ldn.hcam->ilid, | |
1531 | pinstance->ldn.hcam->op_code, | |
1532 | pinstance->ldn.hcam->notification_type, | |
1533 | pinstance->ldn.hcam->notification_lost, | |
1534 | pinstance->ldn.hcam->flags, | |
1535 | pinstance->ldn.hcam->overlay_id); | |
1536 | ||
1537 | /* log only the errors, no need to log informational log entries */ | |
1538 | if (pinstance->ldn.hcam->notification_type != | |
1539 | NOTIFICATION_TYPE_ERROR_LOG) | |
1540 | return; | |
1541 | ||
1542 | if (pinstance->ldn.hcam->notification_lost == | |
1543 | HOSTRCB_NOTIFICATIONS_LOST) | |
1544 | dev_err(&pinstance->pdev->dev, "Error notifications lost\n"); | |
1545 | ||
1546 | ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc); | |
1547 | ||
1548 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || | |
1549 | ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) { | |
1550 | dev_err(&pinstance->pdev->dev, | |
1551 | "UnitAttention due to IOA Bus Reset\n"); | |
1552 | scsi_report_bus_reset( | |
1553 | pinstance->host, | |
1554 | RES_BUS(hcam_ldn->error_log.fd_ra)); | |
1555 | } | |
1556 | ||
1557 | return; | |
1558 | } | |
1559 | ||
1560 | /** | |
1561 | * pmcraid_process_ccn - Op done function for a CCN. | |
1562 | * @cmd: pointer to command struct | |
1563 | * | |
1564 | * This function is the op done function for a configuration | |
1565 | * change notification | |
1566 | * | |
1567 | * Return value: | |
1568 | * none | |
1569 | */ | |
1570 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd) | |
1571 | { | |
1572 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
1573 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); | |
1574 | unsigned long lock_flags; | |
1575 | ||
1576 | pinstance->ccn.cmd = NULL; | |
1577 | pmcraid_return_cmd(cmd); | |
1578 | ||
1579 | /* If driver initiated IOA reset happened while this hcam was pending | |
1580 | * with IOA, or IOA bringdown sequence is in progress, no need to | |
1581 | * re-register the hcam | |
1582 | */ | |
1583 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || | |
1584 | atomic_read(&pinstance->ccn.ignore) == 1) { | |
1585 | return; | |
1586 | } else if (ioasc) { | |
1587 | dev_err(&pinstance->pdev->dev, | |
1588 | "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc); | |
1589 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
1590 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); | |
1591 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
1592 | } else { | |
1593 | pmcraid_handle_config_change(pinstance); | |
1594 | } | |
1595 | } | |
1596 | ||
1597 | /** | |
1598 | * pmcraid_process_ldn - op done function for an LDN | |
1599 | * @cmd: pointer to command block | |
1600 | * | |
1601 | * Return value | |
1602 | * none | |
1603 | */ | |
1604 | static void pmcraid_initiate_reset(struct pmcraid_instance *); | |
1605 | ||
1606 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd) | |
1607 | { | |
1608 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
1609 | struct pmcraid_hcam_ldn *ldn_hcam = | |
1610 | (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; | |
1611 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); | |
1612 | u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc); | |
1613 | unsigned long lock_flags; | |
1614 | ||
1615 | /* return the command block back to freepool */ | |
1616 | pinstance->ldn.cmd = NULL; | |
1617 | pmcraid_return_cmd(cmd); | |
1618 | ||
1619 | /* If driver initiated IOA reset happened while this hcam was pending | |
1620 | * with IOA, no need to re-register the hcam as reset engine will do it | |
1621 | * once reset sequence is complete | |
1622 | */ | |
1623 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || | |
1624 | atomic_read(&pinstance->ccn.ignore) == 1) { | |
1625 | return; | |
1626 | } else if (!ioasc) { | |
1627 | pmcraid_handle_error_log(pinstance); | |
1628 | if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) { | |
1629 | spin_lock_irqsave(pinstance->host->host_lock, | |
1630 | lock_flags); | |
1631 | pmcraid_initiate_reset(pinstance); | |
1632 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
1633 | lock_flags); | |
1634 | return; | |
1635 | } | |
1636 | } else { | |
1637 | dev_err(&pinstance->pdev->dev, | |
1638 | "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc); | |
1639 | } | |
1640 | /* send netlink message for HCAM notification if enabled */ | |
1641 | if (!pmcraid_disable_aen) | |
1642 | pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); | |
1643 | ||
1644 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); | |
1645 | if (cmd) | |
1646 | pmcraid_send_hcam_cmd(cmd); | |
1647 | } | |
1648 | ||
1649 | /** | |
1650 | * pmcraid_register_hcams - register HCAMs for CCN and LDN | |
1651 | * | |
1652 | * @pinstance: pointer per adapter instance structure | |
1653 | * | |
1654 | * Return Value | |
1655 | * none | |
1656 | */ | |
1657 | static void pmcraid_register_hcams(struct pmcraid_instance *pinstance) | |
1658 | { | |
1659 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); | |
1660 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); | |
1661 | } | |
1662 | ||
1663 | /** | |
1664 | * pmcraid_unregister_hcams - cancel HCAMs registered already | |
1665 | * @cmd: pointer to command used as part of reset sequence | |
1666 | */ | |
1667 | static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd) | |
1668 | { | |
1669 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
1670 | ||
1671 | /* During IOA bringdown, HCAM gets fired and tasklet proceeds with | |
1672 | * handling hcam response though it is not necessary. In order to | |
1673 | * prevent this, set 'ignore', so that bring-down sequence doesn't | |
1674 | * re-send any more hcams | |
1675 | */ | |
1676 | atomic_set(&pinstance->ccn.ignore, 1); | |
1677 | atomic_set(&pinstance->ldn.ignore, 1); | |
1678 | ||
1679 | /* If adapter reset was forced as part of runtime reset sequence, | |
1680 | * start the reset sequence. | |
1681 | */ | |
1682 | if (pinstance->force_ioa_reset && !pinstance->ioa_bringdown) { | |
1683 | pinstance->force_ioa_reset = 0; | |
1684 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; | |
1685 | pmcraid_reset_alert(cmd); | |
1686 | return; | |
1687 | } | |
1688 | ||
1689 | /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM | |
1690 | * one after the other. So CCN cancellation will be triggered by | |
1691 | * pmcraid_cancel_ldn itself. | |
1692 | */ | |
1693 | pmcraid_cancel_ldn(cmd); | |
1694 | } | |
1695 | ||
1696 | /** | |
1697 | * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset | |
1698 | * @pinstance: pointer to adapter instance structure | |
1699 | * Return Value | |
1700 | * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0 | |
1701 | */ | |
1702 | static void pmcraid_reinit_buffers(struct pmcraid_instance *); | |
1703 | ||
1704 | static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance) | |
1705 | { | |
1706 | u32 intrs; | |
1707 | ||
1708 | pmcraid_reinit_buffers(pinstance); | |
1709 | intrs = pmcraid_read_interrupts(pinstance); | |
1710 | ||
1711 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); | |
1712 | ||
1713 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) { | |
1714 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, | |
1715 | pinstance->int_regs.ioa_host_interrupt_mask_reg); | |
1716 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, | |
1717 | pinstance->int_regs.ioa_host_interrupt_clr_reg); | |
1718 | return 1; | |
1719 | } else { | |
1720 | return 0; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | /** | |
1725 | * pmcraid_soft_reset - performs a soft reset and makes IOA become ready | |
1726 | * @cmd : pointer to reset command block | |
1727 | * | |
1728 | * Return Value | |
1729 | * none | |
1730 | */ | |
1731 | static void pmcraid_soft_reset(struct pmcraid_cmd *cmd) | |
1732 | { | |
1733 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
1734 | u32 int_reg; | |
1735 | u32 doorbell; | |
1736 | ||
1737 | /* There will be an interrupt when Transition to Operational bit is | |
1738 | * set so tasklet would execute next reset task. The timeout handler | |
1739 | * would re-initiate a reset | |
1740 | */ | |
1741 | cmd->cmd_done = pmcraid_ioa_reset; | |
1742 | cmd->timer.data = (unsigned long)cmd; | |
1743 | cmd->timer.expires = jiffies + | |
1744 | msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT); | |
1745 | cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler; | |
1746 | ||
1747 | if (!timer_pending(&cmd->timer)) | |
1748 | add_timer(&cmd->timer); | |
1749 | ||
1750 | /* Enable destructive diagnostics on IOA if it is not yet in | |
1751 | * operational state | |
1752 | */ | |
1753 | doorbell = DOORBELL_RUNTIME_RESET | | |
1754 | DOORBELL_ENABLE_DESTRUCTIVE_DIAGS; | |
1755 | ||
1756 | iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg); | |
1757 | int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); | |
1758 | pmcraid_info("Waiting for IOA to become operational %x:%x\n", | |
1759 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg), | |
1760 | int_reg); | |
1761 | } | |
1762 | ||
1763 | /** | |
1764 | * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt | |
1765 | * | |
1766 | * @pinstance: pointer to adapter instance structure | |
1767 | * | |
1768 | * Return Value | |
1769 | * none | |
1770 | */ | |
1771 | static void pmcraid_get_dump(struct pmcraid_instance *pinstance) | |
1772 | { | |
1773 | pmcraid_info("%s is not yet implemented\n", __func__); | |
1774 | } | |
1775 | ||
1776 | /** | |
1777 | * pmcraid_fail_outstanding_cmds - Fails all outstanding ops. | |
1778 | * @pinstance: pointer to adapter instance structure | |
1779 | * | |
1780 | * This function fails all outstanding ops. If they are submitted to IOA | |
1781 | * already, it sends cancel all messages if IOA is still accepting IOARCBs, | |
1782 | * otherwise just completes the commands and returns the cmd blocks to free | |
1783 | * pool. | |
1784 | * | |
1785 | * Return value: | |
1786 | * none | |
1787 | */ | |
1788 | static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance) | |
1789 | { | |
1790 | struct pmcraid_cmd *cmd, *temp; | |
1791 | unsigned long lock_flags; | |
1792 | ||
1793 | /* pending command list is protected by pending_pool_lock. Its | |
1794 | * traversal must be done as within this lock | |
1795 | */ | |
1796 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); | |
1797 | list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool, | |
1798 | free_list) { | |
1799 | list_del(&cmd->free_list); | |
1800 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, | |
1801 | lock_flags); | |
1802 | cmd->ioa_cb->ioasa.ioasc = | |
1803 | cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET); | |
1804 | cmd->ioa_cb->ioasa.ilid = | |
1805 | cpu_to_be32(PMCRAID_DRIVER_ILID); | |
1806 | ||
1807 | /* In case the command timer is still running */ | |
1808 | del_timer(&cmd->timer); | |
1809 | ||
1810 | /* If this is an IO command, complete it by invoking scsi_done | |
1811 | * function. If this is one of the internal commands other | |
1812 | * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to | |
1813 | * complete it | |
1814 | */ | |
1815 | if (cmd->scsi_cmd) { | |
1816 | ||
1817 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; | |
1818 | __le32 resp = cmd->ioa_cb->ioarcb.response_handle; | |
1819 | ||
1820 | scsi_cmd->result |= DID_ERROR << 16; | |
1821 | ||
1822 | scsi_dma_unmap(scsi_cmd); | |
1823 | pmcraid_return_cmd(cmd); | |
1824 | ||
1825 | ||
1826 | pmcraid_info("failing(%d) CDB[0] = %x result: %x\n", | |
1827 | le32_to_cpu(resp) >> 2, | |
1828 | cmd->ioa_cb->ioarcb.cdb[0], | |
1829 | scsi_cmd->result); | |
1830 | scsi_cmd->scsi_done(scsi_cmd); | |
1831 | } else if (cmd->cmd_done == pmcraid_internal_done || | |
1832 | cmd->cmd_done == pmcraid_erp_done) { | |
1833 | cmd->cmd_done(cmd); | |
1834 | } else if (cmd->cmd_done != pmcraid_ioa_reset) { | |
1835 | pmcraid_return_cmd(cmd); | |
1836 | } | |
1837 | ||
1838 | atomic_dec(&pinstance->outstanding_cmds); | |
1839 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); | |
1840 | } | |
1841 | ||
1842 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); | |
1843 | } | |
1844 | ||
1845 | /** | |
1846 | * pmcraid_ioa_reset - Implementation of IOA reset logic | |
1847 | * | |
1848 | * @cmd: pointer to the cmd block to be used for entire reset process | |
1849 | * | |
1850 | * This function executes most of the steps required for IOA reset. This gets | |
1851 | * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's | |
1852 | * 'eh_' thread. Access to variables used for controling the reset sequence is | |
1853 | * synchronized using host lock. Various functions called during reset process | |
1854 | * would make use of a single command block, pointer to which is also stored in | |
1855 | * adapter instance structure. | |
1856 | * | |
1857 | * Return Value | |
1858 | * None | |
1859 | */ | |
1860 | static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd) | |
1861 | { | |
1862 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
1863 | u8 reset_complete = 0; | |
1864 | ||
1865 | pinstance->ioa_reset_in_progress = 1; | |
1866 | ||
1867 | if (pinstance->reset_cmd != cmd) { | |
1868 | pmcraid_err("reset is called with different command block\n"); | |
1869 | pinstance->reset_cmd = cmd; | |
1870 | } | |
1871 | ||
1872 | pmcraid_info("reset_engine: state = %d, command = %p\n", | |
1873 | pinstance->ioa_state, cmd); | |
1874 | ||
1875 | switch (pinstance->ioa_state) { | |
1876 | ||
1877 | case IOA_STATE_DEAD: | |
1878 | /* If IOA is offline, whatever may be the reset reason, just | |
1879 | * return. callers might be waiting on the reset wait_q, wake | |
1880 | * up them | |
1881 | */ | |
1882 | pmcraid_err("IOA is offline no reset is possible\n"); | |
1883 | reset_complete = 1; | |
1884 | break; | |
1885 | ||
1886 | case IOA_STATE_IN_BRINGDOWN: | |
1887 | /* we enter here, once ioa shutdown command is processed by IOA | |
1888 | * Alert IOA for a possible reset. If reset alert fails, IOA | |
1889 | * goes through hard-reset | |
1890 | */ | |
1891 | pmcraid_disable_interrupts(pinstance, ~0); | |
1892 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; | |
1893 | pmcraid_reset_alert(cmd); | |
1894 | break; | |
1895 | ||
1896 | case IOA_STATE_UNKNOWN: | |
1897 | /* We may be called during probe or resume. Some pre-processing | |
1898 | * is required for prior to reset | |
1899 | */ | |
1900 | scsi_block_requests(pinstance->host); | |
1901 | ||
1902 | /* If asked to reset while IOA was processing responses or | |
1903 | * there are any error responses then IOA may require | |
1904 | * hard-reset. | |
1905 | */ | |
1906 | if (pinstance->ioa_hard_reset == 0) { | |
1907 | if (ioread32(pinstance->ioa_status) & | |
1908 | INTRS_TRANSITION_TO_OPERATIONAL) { | |
1909 | pmcraid_info("sticky bit set, bring-up\n"); | |
1910 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; | |
1911 | pmcraid_reinit_cmdblk(cmd); | |
1912 | pmcraid_identify_hrrq(cmd); | |
1913 | } else { | |
1914 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; | |
1915 | pmcraid_soft_reset(cmd); | |
1916 | } | |
1917 | } else { | |
1918 | /* Alert IOA of a possible reset and wait for critical | |
1919 | * operation in progress bit to reset | |
1920 | */ | |
1921 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; | |
1922 | pmcraid_reset_alert(cmd); | |
1923 | } | |
1924 | break; | |
1925 | ||
1926 | case IOA_STATE_IN_RESET_ALERT: | |
1927 | /* If critical operation in progress bit is reset or wait gets | |
1928 | * timed out, reset proceeds with starting BIST on the IOA. | |
1929 | * pmcraid_ioa_hard_reset keeps a count of reset attempts. If | |
1930 | * they are 3 or more, reset engine marks IOA dead and returns | |
1931 | */ | |
1932 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; | |
1933 | pmcraid_start_bist(cmd); | |
1934 | break; | |
1935 | ||
1936 | case IOA_STATE_IN_HARD_RESET: | |
1937 | pinstance->ioa_reset_attempts++; | |
1938 | ||
1939 | /* retry reset if we haven't reached maximum allowed limit */ | |
1940 | if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) { | |
1941 | pinstance->ioa_reset_attempts = 0; | |
1942 | pmcraid_err("IOA didn't respond marking it as dead\n"); | |
1943 | pinstance->ioa_state = IOA_STATE_DEAD; | |
1944 | reset_complete = 1; | |
1945 | break; | |
1946 | } | |
1947 | ||
1948 | /* Once either bist or pci reset is done, restore PCI config | |
1949 | * space. If this fails, proceed with hard reset again | |
1950 | */ | |
1951 | ||
1952 | if (pci_restore_state(pinstance->pdev)) { | |
1953 | pmcraid_info("config-space error resetting again\n"); | |
1954 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; | |
1955 | pmcraid_reset_alert(cmd); | |
1956 | break; | |
1957 | } | |
1958 | ||
1959 | /* fail all pending commands */ | |
1960 | pmcraid_fail_outstanding_cmds(pinstance); | |
1961 | ||
1962 | /* check if unit check is active, if so extract dump */ | |
1963 | if (pinstance->ioa_unit_check) { | |
1964 | pmcraid_info("unit check is active\n"); | |
1965 | pinstance->ioa_unit_check = 0; | |
1966 | pmcraid_get_dump(pinstance); | |
1967 | pinstance->ioa_reset_attempts--; | |
1968 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; | |
1969 | pmcraid_reset_alert(cmd); | |
1970 | break; | |
1971 | } | |
1972 | ||
1973 | /* if the reset reason is to bring-down the ioa, we might be | |
1974 | * done with the reset restore pci_config_space and complete | |
1975 | * the reset | |
1976 | */ | |
1977 | if (pinstance->ioa_bringdown) { | |
1978 | pmcraid_info("bringing down the adapter\n"); | |
1979 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; | |
1980 | pinstance->ioa_bringdown = 0; | |
1981 | pinstance->ioa_state = IOA_STATE_UNKNOWN; | |
1982 | reset_complete = 1; | |
1983 | } else { | |
1984 | /* bring-up IOA, so proceed with soft reset | |
1985 | * Reinitialize hrrq_buffers and their indices also | |
1986 | * enable interrupts after a pci_restore_state | |
1987 | */ | |
1988 | if (pmcraid_reset_enable_ioa(pinstance)) { | |
1989 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; | |
1990 | pmcraid_info("bringing up the adapter\n"); | |
1991 | pmcraid_reinit_cmdblk(cmd); | |
1992 | pmcraid_identify_hrrq(cmd); | |
1993 | } else { | |
1994 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; | |
1995 | pmcraid_soft_reset(cmd); | |
1996 | } | |
1997 | } | |
1998 | break; | |
1999 | ||
2000 | case IOA_STATE_IN_SOFT_RESET: | |
2001 | /* TRANSITION TO OPERATIONAL is on so start initialization | |
2002 | * sequence | |
2003 | */ | |
2004 | pmcraid_info("In softreset proceeding with bring-up\n"); | |
2005 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; | |
2006 | ||
2007 | /* Initialization commands start with HRRQ identification. From | |
2008 | * now on tasklet completes most of the commands as IOA is up | |
2009 | * and intrs are enabled | |
2010 | */ | |
2011 | pmcraid_identify_hrrq(cmd); | |
2012 | break; | |
2013 | ||
2014 | case IOA_STATE_IN_BRINGUP: | |
2015 | /* we are done with bringing up of IOA, change the ioa_state to | |
2016 | * operational and wake up any waiters | |
2017 | */ | |
2018 | pinstance->ioa_state = IOA_STATE_OPERATIONAL; | |
2019 | reset_complete = 1; | |
2020 | break; | |
2021 | ||
2022 | case IOA_STATE_OPERATIONAL: | |
2023 | default: | |
2024 | /* When IOA is operational and a reset is requested, check for | |
2025 | * the reset reason. If reset is to bring down IOA, unregister | |
2026 | * HCAMs and initiate shutdown; if adapter reset is forced then | |
2027 | * restart reset sequence again | |
2028 | */ | |
2029 | if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE && | |
2030 | pinstance->force_ioa_reset == 0) { | |
2031 | reset_complete = 1; | |
2032 | } else { | |
2033 | if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE) | |
2034 | pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN; | |
2035 | pmcraid_reinit_cmdblk(cmd); | |
2036 | pmcraid_unregister_hcams(cmd); | |
2037 | } | |
2038 | break; | |
2039 | } | |
2040 | ||
2041 | /* reset will be completed if ioa_state is either DEAD or UNKNOWN or | |
2042 | * OPERATIONAL. Reset all control variables used during reset, wake up | |
2043 | * any waiting threads and let the SCSI mid-layer send commands. Note | |
2044 | * that host_lock must be held before invoking scsi_report_bus_reset. | |
2045 | */ | |
2046 | if (reset_complete) { | |
2047 | pinstance->ioa_reset_in_progress = 0; | |
2048 | pinstance->ioa_reset_attempts = 0; | |
2049 | pinstance->reset_cmd = NULL; | |
2050 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; | |
2051 | pinstance->ioa_bringdown = 0; | |
2052 | pmcraid_return_cmd(cmd); | |
2053 | ||
2054 | /* If target state is to bring up the adapter, proceed with | |
2055 | * hcam registration and resource exposure to mid-layer. | |
2056 | */ | |
2057 | if (pinstance->ioa_state == IOA_STATE_OPERATIONAL) | |
2058 | pmcraid_register_hcams(pinstance); | |
2059 | ||
2060 | wake_up_all(&pinstance->reset_wait_q); | |
2061 | } | |
2062 | ||
2063 | return; | |
2064 | } | |
2065 | ||
2066 | /** | |
2067 | * pmcraid_initiate_reset - initiates reset sequence. This is called from | |
2068 | * ISR/tasklet during error interrupts including IOA unit check. If reset | |
2069 | * is already in progress, it just returns, otherwise initiates IOA reset | |
2070 | * to bring IOA up to operational state. | |
2071 | * | |
2072 | * @pinstance: pointer to adapter instance structure | |
2073 | * | |
2074 | * Return value | |
2075 | * none | |
2076 | */ | |
2077 | static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance) | |
2078 | { | |
2079 | struct pmcraid_cmd *cmd; | |
2080 | ||
2081 | /* If the reset is already in progress, just return, otherwise start | |
2082 | * reset sequence and return | |
2083 | */ | |
2084 | if (!pinstance->ioa_reset_in_progress) { | |
2085 | scsi_block_requests(pinstance->host); | |
2086 | cmd = pmcraid_get_free_cmd(pinstance); | |
2087 | ||
2088 | if (cmd == NULL) { | |
2089 | pmcraid_err("no cmnd blocks for initiate_reset\n"); | |
2090 | return; | |
2091 | } | |
2092 | ||
2093 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; | |
2094 | pinstance->reset_cmd = cmd; | |
2095 | pinstance->force_ioa_reset = 1; | |
2096 | pmcraid_ioa_reset(cmd); | |
2097 | } | |
2098 | } | |
2099 | ||
2100 | /** | |
2101 | * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup | |
2102 | * or bringdown IOA | |
2103 | * @pinstance: pointer adapter instance structure | |
2104 | * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV | |
2105 | * @target_state: expected target state after reset | |
2106 | * | |
2107 | * Note: This command initiates reset and waits for its completion. Hence this | |
2108 | * should not be called from isr/timer/tasklet functions (timeout handlers, | |
2109 | * error response handlers and interrupt handlers). | |
2110 | * | |
2111 | * Return Value | |
2112 | * 1 in case ioa_state is not target_state, 0 otherwise. | |
2113 | */ | |
2114 | static int pmcraid_reset_reload( | |
2115 | struct pmcraid_instance *pinstance, | |
2116 | u8 shutdown_type, | |
2117 | u8 target_state | |
2118 | ) | |
2119 | { | |
2120 | struct pmcraid_cmd *reset_cmd = NULL; | |
2121 | unsigned long lock_flags; | |
2122 | int reset = 1; | |
2123 | ||
2124 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
2125 | ||
2126 | if (pinstance->ioa_reset_in_progress) { | |
2127 | pmcraid_info("reset_reload: reset is already in progress\n"); | |
2128 | ||
2129 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
2130 | ||
2131 | wait_event(pinstance->reset_wait_q, | |
2132 | !pinstance->ioa_reset_in_progress); | |
2133 | ||
2134 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
2135 | ||
2136 | if (pinstance->ioa_state == IOA_STATE_DEAD) { | |
2137 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
2138 | lock_flags); | |
2139 | pmcraid_info("reset_reload: IOA is dead\n"); | |
2140 | return reset; | |
2141 | } else if (pinstance->ioa_state == target_state) { | |
2142 | reset = 0; | |
2143 | } | |
2144 | } | |
2145 | ||
2146 | if (reset) { | |
2147 | pmcraid_info("reset_reload: proceeding with reset\n"); | |
2148 | scsi_block_requests(pinstance->host); | |
2149 | reset_cmd = pmcraid_get_free_cmd(pinstance); | |
2150 | ||
2151 | if (reset_cmd == NULL) { | |
2152 | pmcraid_err("no free cmnd for reset_reload\n"); | |
2153 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
2154 | lock_flags); | |
2155 | return reset; | |
2156 | } | |
2157 | ||
2158 | if (shutdown_type == SHUTDOWN_NORMAL) | |
2159 | pinstance->ioa_bringdown = 1; | |
2160 | ||
2161 | pinstance->ioa_shutdown_type = shutdown_type; | |
2162 | pinstance->reset_cmd = reset_cmd; | |
2163 | pinstance->force_ioa_reset = reset; | |
2164 | pmcraid_info("reset_reload: initiating reset\n"); | |
2165 | pmcraid_ioa_reset(reset_cmd); | |
2166 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
2167 | pmcraid_info("reset_reload: waiting for reset to complete\n"); | |
2168 | wait_event(pinstance->reset_wait_q, | |
2169 | !pinstance->ioa_reset_in_progress); | |
2170 | ||
2171 | pmcraid_info("reset_reload: reset is complete !! \n"); | |
2172 | scsi_unblock_requests(pinstance->host); | |
2173 | if (pinstance->ioa_state == target_state) | |
2174 | reset = 0; | |
2175 | } | |
2176 | ||
2177 | return reset; | |
2178 | } | |
2179 | ||
2180 | /** | |
2181 | * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA | |
2182 | * | |
2183 | * @pinstance: pointer to adapter instance structure | |
2184 | * | |
2185 | * Return Value | |
2186 | * whatever is returned from pmcraid_reset_reload | |
2187 | */ | |
2188 | static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance) | |
2189 | { | |
2190 | return pmcraid_reset_reload(pinstance, | |
2191 | SHUTDOWN_NORMAL, | |
2192 | IOA_STATE_UNKNOWN); | |
2193 | } | |
2194 | ||
2195 | /** | |
2196 | * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA | |
2197 | * | |
2198 | * @pinstance: pointer to adapter instance structure | |
2199 | * | |
2200 | * Return Value | |
2201 | * whatever is returned from pmcraid_reset_reload | |
2202 | */ | |
2203 | static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance) | |
2204 | { | |
2205 | return pmcraid_reset_reload(pinstance, | |
2206 | SHUTDOWN_NONE, | |
2207 | IOA_STATE_OPERATIONAL); | |
2208 | } | |
2209 | ||
2210 | /** | |
2211 | * pmcraid_request_sense - Send request sense to a device | |
2212 | * @cmd: pmcraid command struct | |
2213 | * | |
2214 | * This function sends a request sense to a device as a result of a check | |
2215 | * condition. This method re-uses the same command block that failed earlier. | |
2216 | */ | |
2217 | static void pmcraid_request_sense(struct pmcraid_cmd *cmd) | |
2218 | { | |
2219 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; | |
2220 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; | |
2221 | ||
2222 | /* allocate DMAable memory for sense buffers */ | |
2223 | cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev, | |
2224 | SCSI_SENSE_BUFFERSIZE, | |
2225 | &cmd->sense_buffer_dma); | |
2226 | ||
2227 | if (cmd->sense_buffer == NULL) { | |
2228 | pmcraid_err | |
2229 | ("couldn't allocate sense buffer for request sense\n"); | |
2230 | pmcraid_erp_done(cmd); | |
2231 | return; | |
2232 | } | |
2233 | ||
2234 | /* re-use the command block */ | |
2235 | memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa)); | |
2236 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); | |
2237 | ioarcb->request_flags0 = (SYNC_COMPLETE | | |
2238 | NO_LINK_DESCS | | |
2239 | INHIBIT_UL_CHECK); | |
2240 | ioarcb->request_type = REQ_TYPE_SCSI; | |
2241 | ioarcb->cdb[0] = REQUEST_SENSE; | |
2242 | ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE; | |
2243 | ||
2244 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + | |
2245 | offsetof(struct pmcraid_ioarcb, | |
2246 | add_data.u.ioadl[0])); | |
2247 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); | |
2248 | ||
2249 | ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); | |
2250 | ||
2251 | ioadl->address = cpu_to_le64(cmd->sense_buffer_dma); | |
2252 | ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); | |
2253 | ioadl->flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC); | |
2254 | ||
2255 | /* request sense might be called as part of error response processing | |
2256 | * which runs in tasklets context. It is possible that mid-layer might | |
2257 | * schedule queuecommand during this time, hence, writting to IOARRIN | |
2258 | * must be protect by host_lock | |
2259 | */ | |
2260 | pmcraid_send_cmd(cmd, pmcraid_erp_done, | |
2261 | PMCRAID_REQUEST_SENSE_TIMEOUT, | |
2262 | pmcraid_timeout_handler); | |
2263 | } | |
2264 | ||
2265 | /** | |
2266 | * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery | |
2267 | * @cmd: command that failed | |
2268 | * @sense: true if request_sense is required after cancel all | |
2269 | * | |
2270 | * This function sends a cancel all to a device to clear the queue. | |
2271 | */ | |
2272 | static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense) | |
2273 | { | |
2274 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; | |
2275 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; | |
2276 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; | |
2277 | void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done | |
2278 | : pmcraid_request_sense; | |
2279 | ||
2280 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); | |
2281 | ioarcb->request_flags0 = SYNC_OVERRIDE; | |
2282 | ioarcb->request_type = REQ_TYPE_IOACMD; | |
2283 | ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS; | |
2284 | ||
2285 | if (RES_IS_GSCSI(res->cfg_entry)) | |
2286 | ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL; | |
2287 | ||
2288 | ioarcb->ioadl_bus_addr = 0; | |
2289 | ioarcb->ioadl_length = 0; | |
2290 | ioarcb->data_transfer_length = 0; | |
2291 | ioarcb->ioarcb_bus_addr &= (~0x1FULL); | |
2292 | ||
2293 | /* writing to IOARRIN must be protected by host_lock, as mid-layer | |
2294 | * schedule queuecommand while we are doing this | |
2295 | */ | |
2296 | pmcraid_send_cmd(cmd, cmd_done, | |
2297 | PMCRAID_REQUEST_SENSE_TIMEOUT, | |
2298 | pmcraid_timeout_handler); | |
2299 | } | |
2300 | ||
2301 | /** | |
2302 | * pmcraid_frame_auto_sense: frame fixed format sense information | |
2303 | * | |
2304 | * @cmd: pointer to failing command block | |
2305 | * | |
2306 | * Return value | |
2307 | * none | |
2308 | */ | |
2309 | static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd) | |
2310 | { | |
2311 | u8 *sense_buf = cmd->scsi_cmd->sense_buffer; | |
2312 | struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata; | |
2313 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; | |
2314 | u32 ioasc = le32_to_cpu(ioasa->ioasc); | |
2315 | u32 failing_lba = 0; | |
2316 | ||
2317 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); | |
2318 | cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION; | |
2319 | ||
2320 | if (RES_IS_VSET(res->cfg_entry) && | |
2321 | ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC && | |
2322 | ioasa->u.vset.failing_lba_hi != 0) { | |
2323 | ||
2324 | sense_buf[0] = 0x72; | |
2325 | sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc); | |
2326 | sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc); | |
2327 | sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc); | |
2328 | ||
2329 | sense_buf[7] = 12; | |
2330 | sense_buf[8] = 0; | |
2331 | sense_buf[9] = 0x0A; | |
2332 | sense_buf[10] = 0x80; | |
2333 | ||
2334 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi); | |
2335 | ||
2336 | sense_buf[12] = (failing_lba & 0xff000000) >> 24; | |
2337 | sense_buf[13] = (failing_lba & 0x00ff0000) >> 16; | |
2338 | sense_buf[14] = (failing_lba & 0x0000ff00) >> 8; | |
2339 | sense_buf[15] = failing_lba & 0x000000ff; | |
2340 | ||
2341 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo); | |
2342 | ||
2343 | sense_buf[16] = (failing_lba & 0xff000000) >> 24; | |
2344 | sense_buf[17] = (failing_lba & 0x00ff0000) >> 16; | |
2345 | sense_buf[18] = (failing_lba & 0x0000ff00) >> 8; | |
2346 | sense_buf[19] = failing_lba & 0x000000ff; | |
2347 | } else { | |
2348 | sense_buf[0] = 0x70; | |
2349 | sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc); | |
2350 | sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc); | |
2351 | sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc); | |
2352 | ||
2353 | if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) { | |
2354 | if (RES_IS_VSET(res->cfg_entry)) | |
2355 | failing_lba = | |
2356 | le32_to_cpu(ioasa->u. | |
2357 | vset.failing_lba_lo); | |
2358 | sense_buf[0] |= 0x80; | |
2359 | sense_buf[3] = (failing_lba >> 24) & 0xff; | |
2360 | sense_buf[4] = (failing_lba >> 16) & 0xff; | |
2361 | sense_buf[5] = (failing_lba >> 8) & 0xff; | |
2362 | sense_buf[6] = failing_lba & 0xff; | |
2363 | } | |
2364 | ||
2365 | sense_buf[7] = 6; /* additional length */ | |
2366 | } | |
2367 | } | |
2368 | ||
2369 | /** | |
2370 | * pmcraid_error_handler - Error response handlers for a SCSI op | |
2371 | * @cmd: pointer to pmcraid_cmd that has failed | |
2372 | * | |
2373 | * This function determines whether or not to initiate ERP on the affected | |
2374 | * device. This is called from a tasklet, which doesn't hold any locks. | |
2375 | * | |
2376 | * Return value: | |
2377 | * 0 it caller can complete the request, otherwise 1 where in error | |
2378 | * handler itself completes the request and returns the command block | |
2379 | * back to free-pool | |
2380 | */ | |
2381 | static int pmcraid_error_handler(struct pmcraid_cmd *cmd) | |
2382 | { | |
2383 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; | |
2384 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; | |
2385 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
2386 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; | |
2387 | u32 ioasc = le32_to_cpu(ioasa->ioasc); | |
2388 | u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK; | |
2389 | u32 sense_copied = 0; | |
2390 | ||
2391 | if (!res) { | |
2392 | pmcraid_info("resource pointer is NULL\n"); | |
2393 | return 0; | |
2394 | } | |
2395 | ||
2396 | /* If this was a SCSI read/write command keep count of errors */ | |
2397 | if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD) | |
2398 | atomic_inc(&res->read_failures); | |
2399 | else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD) | |
2400 | atomic_inc(&res->write_failures); | |
2401 | ||
2402 | if (!RES_IS_GSCSI(res->cfg_entry) && | |
2403 | masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) { | |
2404 | pmcraid_frame_auto_sense(cmd); | |
2405 | } | |
2406 | ||
2407 | /* Log IOASC/IOASA information based on user settings */ | |
2408 | pmcraid_ioasc_logger(ioasc, cmd); | |
2409 | ||
2410 | switch (masked_ioasc) { | |
2411 | ||
2412 | case PMCRAID_IOASC_AC_TERMINATED_BY_HOST: | |
2413 | scsi_cmd->result |= (DID_ABORT << 16); | |
2414 | break; | |
2415 | ||
2416 | case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE: | |
2417 | case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE: | |
2418 | scsi_cmd->result |= (DID_NO_CONNECT << 16); | |
2419 | break; | |
2420 | ||
2421 | case PMCRAID_IOASC_NR_SYNC_REQUIRED: | |
2422 | res->sync_reqd = 1; | |
2423 | scsi_cmd->result |= (DID_IMM_RETRY << 16); | |
2424 | break; | |
2425 | ||
2426 | case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC: | |
2427 | scsi_cmd->result |= (DID_PASSTHROUGH << 16); | |
2428 | break; | |
2429 | ||
2430 | case PMCRAID_IOASC_UA_BUS_WAS_RESET: | |
2431 | case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER: | |
2432 | if (!res->reset_progress) | |
2433 | scsi_report_bus_reset(pinstance->host, | |
2434 | scsi_cmd->device->channel); | |
2435 | scsi_cmd->result |= (DID_ERROR << 16); | |
2436 | break; | |
2437 | ||
2438 | case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR: | |
2439 | scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc); | |
2440 | res->sync_reqd = 1; | |
2441 | ||
2442 | /* if check_condition is not active return with error otherwise | |
2443 | * get/frame the sense buffer | |
2444 | */ | |
2445 | if (PMCRAID_IOASC_SENSE_STATUS(ioasc) != | |
2446 | SAM_STAT_CHECK_CONDITION && | |
2447 | PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE) | |
2448 | return 0; | |
2449 | ||
2450 | /* If we have auto sense data as part of IOASA pass it to | |
2451 | * mid-layer | |
2452 | */ | |
2453 | if (ioasa->auto_sense_length != 0) { | |
2454 | short sense_len = ioasa->auto_sense_length; | |
2455 | int data_size = min_t(u16, le16_to_cpu(sense_len), | |
2456 | SCSI_SENSE_BUFFERSIZE); | |
2457 | ||
2458 | memcpy(scsi_cmd->sense_buffer, | |
2459 | ioasa->sense_data, | |
2460 | data_size); | |
2461 | sense_copied = 1; | |
2462 | } | |
2463 | ||
2464 | if (RES_IS_GSCSI(res->cfg_entry)) { | |
2465 | pmcraid_cancel_all(cmd, sense_copied); | |
2466 | } else if (sense_copied) { | |
2467 | pmcraid_erp_done(cmd); | |
2468 | return 0; | |
2469 | } else { | |
2470 | pmcraid_request_sense(cmd); | |
2471 | } | |
2472 | ||
2473 | return 1; | |
2474 | ||
2475 | case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED: | |
2476 | break; | |
2477 | ||
2478 | default: | |
2479 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR) | |
2480 | scsi_cmd->result |= (DID_ERROR << 16); | |
2481 | break; | |
2482 | } | |
2483 | return 0; | |
2484 | } | |
2485 | ||
2486 | /** | |
2487 | * pmcraid_reset_device - device reset handler functions | |
2488 | * | |
2489 | * @scsi_cmd: scsi command struct | |
2490 | * @modifier: reset modifier indicating the reset sequence to be performed | |
2491 | * | |
2492 | * This function issues a device reset to the affected device. | |
2493 | * A LUN reset will be sent to the device first. If that does | |
2494 | * not work, a target reset will be sent. | |
2495 | * | |
2496 | * Return value: | |
2497 | * SUCCESS / FAILED | |
2498 | */ | |
2499 | static int pmcraid_reset_device( | |
2500 | struct scsi_cmnd *scsi_cmd, | |
2501 | unsigned long timeout, | |
2502 | u8 modifier | |
2503 | ) | |
2504 | { | |
2505 | struct pmcraid_cmd *cmd; | |
2506 | struct pmcraid_instance *pinstance; | |
2507 | struct pmcraid_resource_entry *res; | |
2508 | struct pmcraid_ioarcb *ioarcb; | |
2509 | unsigned long lock_flags; | |
2510 | u32 ioasc; | |
2511 | ||
2512 | pinstance = | |
2513 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; | |
2514 | res = scsi_cmd->device->hostdata; | |
2515 | ||
2516 | if (!res) { | |
2517 | pmcraid_err("reset_device: NULL resource pointer\n"); | |
2518 | return FAILED; | |
2519 | } | |
2520 | ||
2521 | /* If adapter is currently going through reset/reload, return failed. | |
2522 | * This will force the mid-layer to call _eh_bus/host reset, which | |
2523 | * will then go to sleep and wait for the reset to complete | |
2524 | */ | |
2525 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
2526 | if (pinstance->ioa_reset_in_progress || | |
2527 | pinstance->ioa_state == IOA_STATE_DEAD) { | |
2528 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
2529 | return FAILED; | |
2530 | } | |
2531 | ||
2532 | res->reset_progress = 1; | |
2533 | pmcraid_info("Resetting %s resource with addr %x\n", | |
2534 | ((modifier & RESET_DEVICE_LUN) ? "LUN" : | |
2535 | ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")), | |
2536 | le32_to_cpu(res->cfg_entry.resource_address)); | |
2537 | ||
2538 | /* get a free cmd block */ | |
2539 | cmd = pmcraid_get_free_cmd(pinstance); | |
2540 | ||
2541 | if (cmd == NULL) { | |
2542 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
2543 | pmcraid_err("%s: no cmd blocks are available\n", __func__); | |
2544 | return FAILED; | |
2545 | } | |
2546 | ||
2547 | ioarcb = &cmd->ioa_cb->ioarcb; | |
2548 | ioarcb->resource_handle = res->cfg_entry.resource_handle; | |
2549 | ioarcb->request_type = REQ_TYPE_IOACMD; | |
2550 | ioarcb->cdb[0] = PMCRAID_RESET_DEVICE; | |
2551 | ||
2552 | /* Initialize reset modifier bits */ | |
2553 | if (modifier) | |
2554 | modifier = ENABLE_RESET_MODIFIER | modifier; | |
2555 | ||
2556 | ioarcb->cdb[1] = modifier; | |
2557 | ||
2558 | init_completion(&cmd->wait_for_completion); | |
2559 | cmd->completion_req = 1; | |
2560 | ||
2561 | pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n", | |
2562 | cmd->ioa_cb->ioarcb.cdb[0], | |
2563 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle), | |
2564 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2); | |
2565 | ||
2566 | pmcraid_send_cmd(cmd, | |
2567 | pmcraid_internal_done, | |
2568 | timeout, | |
2569 | pmcraid_timeout_handler); | |
2570 | ||
2571 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
2572 | ||
2573 | /* RESET_DEVICE command completes after all pending IOARCBs are | |
2574 | * completed. Once this command is completed, pmcraind_internal_done | |
2575 | * will wake up the 'completion' queue. | |
2576 | */ | |
2577 | wait_for_completion(&cmd->wait_for_completion); | |
2578 | ||
2579 | /* complete the command here itself and return the command block | |
2580 | * to free list | |
2581 | */ | |
2582 | pmcraid_return_cmd(cmd); | |
2583 | res->reset_progress = 0; | |
2584 | ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); | |
2585 | ||
2586 | /* set the return value based on the returned ioasc */ | |
2587 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; | |
2588 | } | |
2589 | ||
2590 | /** | |
2591 | * _pmcraid_io_done - helper for pmcraid_io_done function | |
2592 | * | |
2593 | * @cmd: pointer to pmcraid command struct | |
2594 | * @reslen: residual data length to be set in the ioasa | |
2595 | * @ioasc: ioasc either returned by IOA or set by driver itself. | |
2596 | * | |
2597 | * This function is invoked by pmcraid_io_done to complete mid-layer | |
2598 | * scsi ops. | |
2599 | * | |
2600 | * Return value: | |
2601 | * 0 if caller is required to return it to free_pool. Returns 1 if | |
2602 | * caller need not worry about freeing command block as error handler | |
2603 | * will take care of that. | |
2604 | */ | |
2605 | ||
2606 | static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc) | |
2607 | { | |
2608 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; | |
2609 | int rc = 0; | |
2610 | ||
2611 | scsi_set_resid(scsi_cmd, reslen); | |
2612 | ||
2613 | pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n", | |
2614 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2, | |
2615 | cmd->ioa_cb->ioarcb.cdb[0], | |
2616 | ioasc, scsi_cmd->result); | |
2617 | ||
2618 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0) | |
2619 | rc = pmcraid_error_handler(cmd); | |
2620 | ||
2621 | if (rc == 0) { | |
2622 | scsi_dma_unmap(scsi_cmd); | |
2623 | scsi_cmd->scsi_done(scsi_cmd); | |
2624 | } | |
2625 | ||
2626 | return rc; | |
2627 | } | |
2628 | ||
2629 | /** | |
2630 | * pmcraid_io_done - SCSI completion function | |
2631 | * | |
2632 | * @cmd: pointer to pmcraid command struct | |
2633 | * | |
2634 | * This function is invoked by tasklet/mid-layer error handler to completing | |
2635 | * the SCSI ops sent from mid-layer. | |
2636 | * | |
2637 | * Return value | |
2638 | * none | |
2639 | */ | |
2640 | ||
2641 | static void pmcraid_io_done(struct pmcraid_cmd *cmd) | |
2642 | { | |
2643 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); | |
2644 | u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length); | |
2645 | ||
2646 | if (_pmcraid_io_done(cmd, reslen, ioasc) == 0) | |
2647 | pmcraid_return_cmd(cmd); | |
2648 | } | |
2649 | ||
2650 | /** | |
2651 | * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA | |
2652 | * | |
2653 | * @cmd: command block of the command to be aborted | |
2654 | * | |
2655 | * Return Value: | |
2656 | * returns pointer to command structure used as cancelling cmd | |
2657 | */ | |
2658 | static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd) | |
2659 | { | |
2660 | struct pmcraid_cmd *cancel_cmd; | |
2661 | struct pmcraid_instance *pinstance; | |
2662 | struct pmcraid_resource_entry *res; | |
2663 | ||
2664 | pinstance = (struct pmcraid_instance *)cmd->drv_inst; | |
2665 | res = cmd->scsi_cmd->device->hostdata; | |
2666 | ||
2667 | cancel_cmd = pmcraid_get_free_cmd(pinstance); | |
2668 | ||
2669 | if (cancel_cmd == NULL) { | |
2670 | pmcraid_err("%s: no cmd blocks are available\n", __func__); | |
2671 | return NULL; | |
2672 | } | |
2673 | ||
2674 | pmcraid_prepare_cancel_cmd(cancel_cmd, cmd); | |
2675 | ||
2676 | pmcraid_info("aborting command CDB[0]= %x with index = %d\n", | |
2677 | cmd->ioa_cb->ioarcb.cdb[0], | |
2678 | cmd->ioa_cb->ioarcb.response_handle >> 2); | |
2679 | ||
2680 | init_completion(&cancel_cmd->wait_for_completion); | |
2681 | cancel_cmd->completion_req = 1; | |
2682 | ||
2683 | pmcraid_info("command (%d) CDB[0] = %x for %x\n", | |
2684 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2, | |
2685 | cmd->ioa_cb->ioarcb.cdb[0], | |
2686 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle)); | |
2687 | ||
2688 | pmcraid_send_cmd(cancel_cmd, | |
2689 | pmcraid_internal_done, | |
2690 | PMCRAID_INTERNAL_TIMEOUT, | |
2691 | pmcraid_timeout_handler); | |
2692 | return cancel_cmd; | |
2693 | } | |
2694 | ||
2695 | /** | |
2696 | * pmcraid_abort_complete - Waits for ABORT TASK completion | |
2697 | * | |
2698 | * @cancel_cmd: command block use as cancelling command | |
2699 | * | |
2700 | * Return Value: | |
2701 | * returns SUCCESS if ABORT TASK has good completion | |
2702 | * otherwise FAILED | |
2703 | */ | |
2704 | static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd) | |
2705 | { | |
2706 | struct pmcraid_resource_entry *res; | |
2707 | u32 ioasc; | |
2708 | ||
2709 | wait_for_completion(&cancel_cmd->wait_for_completion); | |
2710 | res = cancel_cmd->u.res; | |
2711 | cancel_cmd->u.res = NULL; | |
2712 | ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc); | |
2713 | ||
2714 | /* If the abort task is not timed out we will get a Good completion | |
2715 | * as sense_key, otherwise we may get one the following responses | |
2716 | * due to subsquent bus reset or device reset. In case IOASC is | |
2717 | * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource | |
2718 | */ | |
2719 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || | |
2720 | ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) { | |
2721 | if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) | |
2722 | res->sync_reqd = 1; | |
2723 | ioasc = 0; | |
2724 | } | |
2725 | ||
2726 | /* complete the command here itself */ | |
2727 | pmcraid_return_cmd(cancel_cmd); | |
2728 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; | |
2729 | } | |
2730 | ||
2731 | /** | |
2732 | * pmcraid_eh_abort_handler - entry point for aborting a single task on errors | |
2733 | * | |
2734 | * @scsi_cmd: scsi command struct given by mid-layer. When this is called | |
2735 | * mid-layer ensures that no other commands are queued. This | |
2736 | * never gets called under interrupt, but a separate eh thread. | |
2737 | * | |
2738 | * Return value: | |
2739 | * SUCCESS / FAILED | |
2740 | */ | |
2741 | static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd) | |
2742 | { | |
2743 | struct pmcraid_instance *pinstance; | |
2744 | struct pmcraid_cmd *cmd; | |
2745 | struct pmcraid_resource_entry *res; | |
2746 | unsigned long host_lock_flags; | |
2747 | unsigned long pending_lock_flags; | |
2748 | struct pmcraid_cmd *cancel_cmd = NULL; | |
2749 | int cmd_found = 0; | |
2750 | int rc = FAILED; | |
2751 | ||
2752 | pinstance = | |
2753 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; | |
2754 | ||
2755 | dev_err(&pinstance->pdev->dev, | |
2756 | "I/O command timed out, aborting it.\n"); | |
2757 | ||
2758 | res = scsi_cmd->device->hostdata; | |
2759 | ||
2760 | if (res == NULL) | |
2761 | return rc; | |
2762 | ||
2763 | /* If we are currently going through reset/reload, return failed. | |
2764 | * This will force the mid-layer to eventually call | |
2765 | * pmcraid_eh_host_reset which will then go to sleep and wait for the | |
2766 | * reset to complete | |
2767 | */ | |
2768 | spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags); | |
2769 | ||
2770 | if (pinstance->ioa_reset_in_progress || | |
2771 | pinstance->ioa_state == IOA_STATE_DEAD) { | |
2772 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
2773 | host_lock_flags); | |
2774 | return rc; | |
2775 | } | |
2776 | ||
2777 | /* loop over pending cmd list to find cmd corresponding to this | |
2778 | * scsi_cmd. Note that this command might not have been completed | |
2779 | * already. locking: all pending commands are protected with | |
2780 | * pending_pool_lock. | |
2781 | */ | |
2782 | spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags); | |
2783 | list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) { | |
2784 | ||
2785 | if (cmd->scsi_cmd == scsi_cmd) { | |
2786 | cmd_found = 1; | |
2787 | break; | |
2788 | } | |
2789 | } | |
2790 | ||
2791 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, | |
2792 | pending_lock_flags); | |
2793 | ||
2794 | /* If the command to be aborted was given to IOA and still pending with | |
2795 | * it, send ABORT_TASK to abort this and wait for its completion | |
2796 | */ | |
2797 | if (cmd_found) | |
2798 | cancel_cmd = pmcraid_abort_cmd(cmd); | |
2799 | ||
2800 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
2801 | host_lock_flags); | |
2802 | ||
2803 | if (cancel_cmd) { | |
2804 | cancel_cmd->u.res = cmd->scsi_cmd->device->hostdata; | |
2805 | rc = pmcraid_abort_complete(cancel_cmd); | |
2806 | } | |
2807 | ||
2808 | return cmd_found ? rc : SUCCESS; | |
2809 | } | |
2810 | ||
2811 | /** | |
2812 | * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks | |
2813 | * | |
2814 | * @scmd: pointer to scsi_cmd that was sent to the resource to be reset. | |
2815 | * | |
2816 | * All these routines invokve pmcraid_reset_device with appropriate parameters. | |
2817 | * Since these are called from mid-layer EH thread, no other IO will be queued | |
2818 | * to the resource being reset. However, control path (IOCTL) may be active so | |
2819 | * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device | |
2820 | * takes care by locking/unlocking host_lock. | |
2821 | * | |
2822 | * Return value | |
2823 | * SUCCESS or FAILED | |
2824 | */ | |
2825 | static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd) | |
2826 | { | |
2827 | pmcraid_err("Doing device reset due to an I/O command timeout.\n"); | |
2828 | return pmcraid_reset_device(scmd, | |
2829 | PMCRAID_INTERNAL_TIMEOUT, | |
2830 | RESET_DEVICE_LUN); | |
2831 | } | |
2832 | ||
2833 | static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd) | |
2834 | { | |
2835 | pmcraid_err("Doing bus reset due to an I/O command timeout.\n"); | |
2836 | return pmcraid_reset_device(scmd, | |
2837 | PMCRAID_RESET_BUS_TIMEOUT, | |
2838 | RESET_DEVICE_BUS); | |
2839 | } | |
2840 | ||
2841 | static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd) | |
2842 | { | |
2843 | pmcraid_err("Doing target reset due to an I/O command timeout.\n"); | |
2844 | return pmcraid_reset_device(scmd, | |
2845 | PMCRAID_INTERNAL_TIMEOUT, | |
2846 | RESET_DEVICE_TARGET); | |
2847 | } | |
2848 | ||
2849 | /** | |
2850 | * pmcraid_eh_host_reset_handler - adapter reset handler callback | |
2851 | * | |
2852 | * @scmd: pointer to scsi_cmd that was sent to a resource of adapter | |
2853 | * | |
2854 | * Initiates adapter reset to bring it up to operational state | |
2855 | * | |
2856 | * Return value | |
2857 | * SUCCESS or FAILED | |
2858 | */ | |
2859 | static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd) | |
2860 | { | |
2861 | unsigned long interval = 10000; /* 10 seconds interval */ | |
2862 | int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval; | |
2863 | struct pmcraid_instance *pinstance = | |
2864 | (struct pmcraid_instance *)(scmd->device->host->hostdata); | |
2865 | ||
2866 | ||
2867 | /* wait for an additional 150 seconds just in case firmware could come | |
2868 | * up and if it could complete all the pending commands excluding the | |
2869 | * two HCAM (CCN and LDN). | |
2870 | */ | |
2871 | while (waits--) { | |
2872 | if (atomic_read(&pinstance->outstanding_cmds) <= | |
2873 | PMCRAID_MAX_HCAM_CMD) | |
2874 | return SUCCESS; | |
2875 | msleep(interval); | |
2876 | } | |
2877 | ||
2878 | dev_err(&pinstance->pdev->dev, | |
2879 | "Adapter being reset due to an I/O command timeout.\n"); | |
2880 | return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED; | |
2881 | } | |
2882 | ||
2883 | /** | |
2884 | * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes | |
2885 | * @scsi_cmd: scsi command struct | |
2886 | * | |
2887 | * Return value | |
2888 | * number of tags or 0 if the task is not tagged | |
2889 | */ | |
2890 | static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd) | |
2891 | { | |
2892 | char tag[2]; | |
2893 | u8 rc = 0; | |
2894 | ||
2895 | if (scsi_populate_tag_msg(scsi_cmd, tag)) { | |
2896 | switch (tag[0]) { | |
2897 | case MSG_SIMPLE_TAG: | |
2898 | rc = TASK_TAG_SIMPLE; | |
2899 | break; | |
2900 | case MSG_HEAD_TAG: | |
2901 | rc = TASK_TAG_QUEUE_HEAD; | |
2902 | break; | |
2903 | case MSG_ORDERED_TAG: | |
2904 | rc = TASK_TAG_ORDERED; | |
2905 | break; | |
2906 | }; | |
2907 | } | |
2908 | ||
2909 | return rc; | |
2910 | } | |
2911 | ||
2912 | ||
2913 | /** | |
2914 | * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB | |
2915 | * @cmd: pmcraid command struct | |
2916 | * @sgcount: count of scatter-gather elements | |
2917 | * | |
2918 | * Return value | |
2919 | * returns pointer pmcraid_ioadl_desc, initialized to point to internal | |
2920 | * or external IOADLs | |
2921 | */ | |
2922 | struct pmcraid_ioadl_desc * | |
2923 | pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount) | |
2924 | { | |
2925 | struct pmcraid_ioadl_desc *ioadl; | |
2926 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; | |
2927 | int ioadl_count = 0; | |
2928 | ||
2929 | if (ioarcb->add_cmd_param_length) | |
2930 | ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16); | |
2931 | ioarcb->ioadl_length = | |
2932 | sizeof(struct pmcraid_ioadl_desc) * sgcount; | |
2933 | ||
2934 | if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) { | |
2935 | /* external ioadls start at offset 0x80 from control_block | |
2936 | * structure, re-using 24 out of 27 ioadls part of IOARCB. | |
2937 | * It is necessary to indicate to firmware that driver is | |
2938 | * using ioadls to be treated as external to IOARCB. | |
2939 | */ | |
2940 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); | |
2941 | ioarcb->ioadl_bus_addr = | |
2942 | cpu_to_le64((cmd->ioa_cb_bus_addr) + | |
2943 | offsetof(struct pmcraid_ioarcb, | |
2944 | add_data.u.ioadl[3])); | |
2945 | ioadl = &ioarcb->add_data.u.ioadl[3]; | |
2946 | } else { | |
2947 | ioarcb->ioadl_bus_addr = | |
2948 | cpu_to_le64((cmd->ioa_cb_bus_addr) + | |
2949 | offsetof(struct pmcraid_ioarcb, | |
2950 | add_data.u.ioadl[ioadl_count])); | |
2951 | ||
2952 | ioadl = &ioarcb->add_data.u.ioadl[ioadl_count]; | |
2953 | ioarcb->ioarcb_bus_addr |= | |
2954 | DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8); | |
2955 | } | |
2956 | ||
2957 | return ioadl; | |
2958 | } | |
2959 | ||
2960 | /** | |
2961 | * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer | |
2962 | * @pinstance: pointer to adapter instance structure | |
2963 | * @cmd: pmcraid command struct | |
2964 | * | |
2965 | * This function is invoked by queuecommand entry point while sending a command | |
2966 | * to firmware. This builds ioadl descriptors and sets up ioarcb fields. | |
2967 | * | |
2968 | * Return value: | |
2969 | * 0 on success or -1 on failure | |
2970 | */ | |
2971 | static int pmcraid_build_ioadl( | |
2972 | struct pmcraid_instance *pinstance, | |
2973 | struct pmcraid_cmd *cmd | |
2974 | ) | |
2975 | { | |
2976 | int i, nseg; | |
2977 | struct scatterlist *sglist; | |
2978 | ||
2979 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; | |
2980 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); | |
2981 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; | |
2982 | ||
2983 | u32 length = scsi_bufflen(scsi_cmd); | |
2984 | ||
2985 | if (!length) | |
2986 | return 0; | |
2987 | ||
2988 | nseg = scsi_dma_map(scsi_cmd); | |
2989 | ||
2990 | if (nseg < 0) { | |
2991 | dev_err(&pinstance->pdev->dev, "scsi_map_dma failed!\n"); | |
2992 | return -1; | |
2993 | } else if (nseg > PMCRAID_MAX_IOADLS) { | |
2994 | scsi_dma_unmap(scsi_cmd); | |
2995 | dev_err(&pinstance->pdev->dev, | |
2996 | "sg count is (%d) more than allowed!\n", nseg); | |
2997 | return -1; | |
2998 | } | |
2999 | ||
3000 | /* Initialize IOARCB data transfer length fields */ | |
3001 | if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) | |
3002 | ioarcb->request_flags0 |= TRANSFER_DIR_WRITE; | |
3003 | ||
3004 | ioarcb->request_flags0 |= NO_LINK_DESCS; | |
3005 | ioarcb->data_transfer_length = cpu_to_le32(length); | |
3006 | ioadl = pmcraid_init_ioadls(cmd, nseg); | |
3007 | ||
3008 | /* Initialize IOADL descriptor addresses */ | |
3009 | scsi_for_each_sg(scsi_cmd, sglist, nseg, i) { | |
3010 | ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist)); | |
3011 | ioadl[i].address = cpu_to_le64(sg_dma_address(sglist)); | |
3012 | ioadl[i].flags = 0; | |
3013 | } | |
3014 | /* setup last descriptor */ | |
3015 | ioadl[i - 1].flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC); | |
3016 | ||
3017 | return 0; | |
3018 | } | |
3019 | ||
3020 | /** | |
3021 | * pmcraid_free_sglist - Frees an allocated SG buffer list | |
3022 | * @sglist: scatter/gather list pointer | |
3023 | * | |
3024 | * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist | |
3025 | * | |
3026 | * Return value: | |
3027 | * none | |
3028 | */ | |
3029 | static void pmcraid_free_sglist(struct pmcraid_sglist *sglist) | |
3030 | { | |
3031 | int i; | |
3032 | ||
3033 | for (i = 0; i < sglist->num_sg; i++) | |
3034 | __free_pages(sg_page(&(sglist->scatterlist[i])), | |
3035 | sglist->order); | |
3036 | ||
3037 | kfree(sglist); | |
3038 | } | |
3039 | ||
3040 | /** | |
3041 | * pmcraid_alloc_sglist - Allocates memory for a SG list | |
3042 | * @buflen: buffer length | |
3043 | * | |
3044 | * Allocates a DMA'able buffer in chunks and assembles a scatter/gather | |
3045 | * list. | |
3046 | * | |
3047 | * Return value | |
3048 | * pointer to sglist / NULL on failure | |
3049 | */ | |
3050 | static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen) | |
3051 | { | |
3052 | struct pmcraid_sglist *sglist; | |
3053 | struct scatterlist *scatterlist; | |
3054 | struct page *page; | |
3055 | int num_elem, i, j; | |
3056 | int sg_size; | |
3057 | int order; | |
3058 | int bsize_elem; | |
3059 | ||
3060 | sg_size = buflen / (PMCRAID_MAX_IOADLS - 1); | |
3061 | order = (sg_size > 0) ? get_order(sg_size) : 0; | |
3062 | bsize_elem = PAGE_SIZE * (1 << order); | |
3063 | ||
3064 | /* Determine the actual number of sg entries needed */ | |
3065 | if (buflen % bsize_elem) | |
3066 | num_elem = (buflen / bsize_elem) + 1; | |
3067 | else | |
3068 | num_elem = buflen / bsize_elem; | |
3069 | ||
3070 | /* Allocate a scatter/gather list for the DMA */ | |
3071 | sglist = kzalloc(sizeof(struct pmcraid_sglist) + | |
3072 | (sizeof(struct scatterlist) * (num_elem - 1)), | |
3073 | GFP_KERNEL); | |
3074 | ||
3075 | if (sglist == NULL) | |
3076 | return NULL; | |
3077 | ||
3078 | scatterlist = sglist->scatterlist; | |
3079 | sg_init_table(scatterlist, num_elem); | |
3080 | sglist->order = order; | |
3081 | sglist->num_sg = num_elem; | |
3082 | sg_size = buflen; | |
3083 | ||
3084 | for (i = 0; i < num_elem; i++) { | |
3085 | page = alloc_pages(GFP_KERNEL|GFP_DMA, order); | |
3086 | if (!page) { | |
3087 | for (j = i - 1; j >= 0; j--) | |
3088 | __free_pages(sg_page(&scatterlist[j]), order); | |
3089 | kfree(sglist); | |
3090 | return NULL; | |
3091 | } | |
3092 | ||
3093 | sg_set_page(&scatterlist[i], page, | |
3094 | sg_size < bsize_elem ? sg_size : bsize_elem, 0); | |
3095 | sg_size -= bsize_elem; | |
3096 | } | |
3097 | ||
3098 | return sglist; | |
3099 | } | |
3100 | ||
3101 | /** | |
3102 | * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list | |
3103 | * @sglist: scatter/gather list pointer | |
3104 | * @buffer: buffer pointer | |
3105 | * @len: buffer length | |
3106 | * @direction: data transfer direction | |
3107 | * | |
3108 | * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist | |
3109 | * | |
3110 | * Return value: | |
3111 | * 0 on success / other on failure | |
3112 | */ | |
3113 | static int pmcraid_copy_sglist( | |
3114 | struct pmcraid_sglist *sglist, | |
3115 | unsigned long buffer, | |
3116 | u32 len, | |
3117 | int direction | |
3118 | ) | |
3119 | { | |
3120 | struct scatterlist *scatterlist; | |
3121 | void *kaddr; | |
3122 | int bsize_elem; | |
3123 | int i; | |
3124 | int rc = 0; | |
3125 | ||
3126 | /* Determine the actual number of bytes per element */ | |
3127 | bsize_elem = PAGE_SIZE * (1 << sglist->order); | |
3128 | ||
3129 | scatterlist = sglist->scatterlist; | |
3130 | ||
3131 | for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) { | |
3132 | struct page *page = sg_page(&scatterlist[i]); | |
3133 | ||
3134 | kaddr = kmap(page); | |
3135 | if (direction == DMA_TO_DEVICE) | |
3136 | rc = __copy_from_user(kaddr, | |
3137 | (void *)buffer, | |
3138 | bsize_elem); | |
3139 | else | |
3140 | rc = __copy_to_user((void *)buffer, kaddr, bsize_elem); | |
3141 | ||
3142 | kunmap(page); | |
3143 | ||
3144 | if (rc) { | |
3145 | pmcraid_err("failed to copy user data into sg list\n"); | |
3146 | return -EFAULT; | |
3147 | } | |
3148 | ||
3149 | scatterlist[i].length = bsize_elem; | |
3150 | } | |
3151 | ||
3152 | if (len % bsize_elem) { | |
3153 | struct page *page = sg_page(&scatterlist[i]); | |
3154 | ||
3155 | kaddr = kmap(page); | |
3156 | ||
3157 | if (direction == DMA_TO_DEVICE) | |
3158 | rc = __copy_from_user(kaddr, | |
3159 | (void *)buffer, | |
3160 | len % bsize_elem); | |
3161 | else | |
3162 | rc = __copy_to_user((void *)buffer, | |
3163 | kaddr, | |
3164 | len % bsize_elem); | |
3165 | ||
3166 | kunmap(page); | |
3167 | ||
3168 | scatterlist[i].length = len % bsize_elem; | |
3169 | } | |
3170 | ||
3171 | if (rc) { | |
3172 | pmcraid_err("failed to copy user data into sg list\n"); | |
3173 | rc = -EFAULT; | |
3174 | } | |
3175 | ||
3176 | return rc; | |
3177 | } | |
3178 | ||
3179 | /** | |
3180 | * pmcraid_queuecommand - Queue a mid-layer request | |
3181 | * @scsi_cmd: scsi command struct | |
3182 | * @done: done function | |
3183 | * | |
3184 | * This function queues a request generated by the mid-layer. Midlayer calls | |
3185 | * this routine within host->lock. Some of the functions called by queuecommand | |
3186 | * would use cmd block queue locks (free_pool_lock and pending_pool_lock) | |
3187 | * | |
3188 | * Return value: | |
3189 | * 0 on success | |
3190 | * SCSI_MLQUEUE_DEVICE_BUSY if device is busy | |
3191 | * SCSI_MLQUEUE_HOST_BUSY if host is busy | |
3192 | */ | |
3193 | static int pmcraid_queuecommand( | |
3194 | struct scsi_cmnd *scsi_cmd, | |
3195 | void (*done) (struct scsi_cmnd *) | |
3196 | ) | |
3197 | { | |
3198 | struct pmcraid_instance *pinstance; | |
3199 | struct pmcraid_resource_entry *res; | |
3200 | struct pmcraid_ioarcb *ioarcb; | |
3201 | struct pmcraid_cmd *cmd; | |
3202 | int rc = 0; | |
3203 | ||
3204 | pinstance = | |
3205 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; | |
3206 | ||
3207 | scsi_cmd->scsi_done = done; | |
3208 | res = scsi_cmd->device->hostdata; | |
3209 | scsi_cmd->result = (DID_OK << 16); | |
3210 | ||
3211 | /* if adapter is marked as dead, set result to DID_NO_CONNECT complete | |
3212 | * the command | |
3213 | */ | |
3214 | if (pinstance->ioa_state == IOA_STATE_DEAD) { | |
3215 | pmcraid_info("IOA is dead, but queuecommand is scheduled\n"); | |
3216 | scsi_cmd->result = (DID_NO_CONNECT << 16); | |
3217 | scsi_cmd->scsi_done(scsi_cmd); | |
3218 | return 0; | |
3219 | } | |
3220 | ||
3221 | /* If IOA reset is in progress, can't queue the commands */ | |
3222 | if (pinstance->ioa_reset_in_progress) | |
3223 | return SCSI_MLQUEUE_HOST_BUSY; | |
3224 | ||
3225 | /* initialize the command and IOARCB to be sent to IOA */ | |
3226 | cmd = pmcraid_get_free_cmd(pinstance); | |
3227 | ||
3228 | if (cmd == NULL) { | |
3229 | pmcraid_err("free command block is not available\n"); | |
3230 | return SCSI_MLQUEUE_HOST_BUSY; | |
3231 | } | |
3232 | ||
3233 | cmd->scsi_cmd = scsi_cmd; | |
3234 | ioarcb = &(cmd->ioa_cb->ioarcb); | |
3235 | memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len); | |
3236 | ioarcb->resource_handle = res->cfg_entry.resource_handle; | |
3237 | ioarcb->request_type = REQ_TYPE_SCSI; | |
3238 | ||
3239 | cmd->cmd_done = pmcraid_io_done; | |
3240 | ||
3241 | if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) { | |
3242 | if (scsi_cmd->underflow == 0) | |
3243 | ioarcb->request_flags0 |= INHIBIT_UL_CHECK; | |
3244 | ||
3245 | if (res->sync_reqd) { | |
3246 | ioarcb->request_flags0 |= SYNC_COMPLETE; | |
3247 | res->sync_reqd = 0; | |
3248 | } | |
3249 | ||
3250 | ioarcb->request_flags0 |= NO_LINK_DESCS; | |
3251 | ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd); | |
3252 | ||
3253 | if (RES_IS_GSCSI(res->cfg_entry)) | |
3254 | ioarcb->request_flags1 |= DELAY_AFTER_RESET; | |
3255 | } | |
3256 | ||
3257 | rc = pmcraid_build_ioadl(pinstance, cmd); | |
3258 | ||
3259 | pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n", | |
3260 | le32_to_cpu(ioarcb->response_handle) >> 2, | |
3261 | scsi_cmd->cmnd[0], pinstance->host->unique_id, | |
3262 | RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID : | |
3263 | PMCRAID_PHYS_BUS_ID, | |
3264 | RES_IS_VSET(res->cfg_entry) ? | |
3265 | res->cfg_entry.unique_flags1 : | |
3266 | RES_TARGET(res->cfg_entry.resource_address), | |
3267 | RES_LUN(res->cfg_entry.resource_address)); | |
3268 | ||
3269 | if (likely(rc == 0)) { | |
3270 | _pmcraid_fire_command(cmd); | |
3271 | } else { | |
3272 | pmcraid_err("queuecommand could not build ioadl\n"); | |
3273 | pmcraid_return_cmd(cmd); | |
3274 | rc = SCSI_MLQUEUE_HOST_BUSY; | |
3275 | } | |
3276 | ||
3277 | return rc; | |
3278 | } | |
3279 | ||
3280 | /** | |
3281 | * pmcraid_open -char node "open" entry, allowed only users with admin access | |
3282 | */ | |
3283 | static int pmcraid_chr_open(struct inode *inode, struct file *filep) | |
3284 | { | |
3285 | struct pmcraid_instance *pinstance; | |
3286 | ||
3287 | if (!capable(CAP_SYS_ADMIN)) | |
3288 | return -EACCES; | |
3289 | ||
3290 | /* Populate adapter instance * pointer for use by ioctl */ | |
3291 | pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev); | |
3292 | filep->private_data = pinstance; | |
3293 | ||
3294 | return 0; | |
3295 | } | |
3296 | ||
3297 | /** | |
3298 | * pmcraid_release - char node "release" entry point | |
3299 | */ | |
3300 | static int pmcraid_chr_release(struct inode *inode, struct file *filep) | |
3301 | { | |
3302 | struct pmcraid_instance *pinstance = | |
3303 | ((struct pmcraid_instance *)filep->private_data); | |
3304 | ||
3305 | filep->private_data = NULL; | |
3306 | fasync_helper(-1, filep, 0, &pinstance->aen_queue); | |
3307 | ||
3308 | return 0; | |
3309 | } | |
3310 | ||
3311 | /** | |
3312 | * pmcraid_fasync - Async notifier registration from applications | |
3313 | * | |
3314 | * This function adds the calling process to a driver global queue. When an | |
3315 | * event occurs, SIGIO will be sent to all processes in this queue. | |
3316 | */ | |
3317 | static int pmcraid_chr_fasync(int fd, struct file *filep, int mode) | |
3318 | { | |
3319 | struct pmcraid_instance *pinstance; | |
3320 | int rc; | |
3321 | ||
3322 | pinstance = (struct pmcraid_instance *)filep->private_data; | |
3323 | mutex_lock(&pinstance->aen_queue_lock); | |
3324 | rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue); | |
3325 | mutex_unlock(&pinstance->aen_queue_lock); | |
3326 | ||
3327 | return rc; | |
3328 | } | |
3329 | ||
3330 | ||
3331 | /** | |
3332 | * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough | |
3333 | * commands sent over IOCTL interface | |
3334 | * | |
3335 | * @cmd : pointer to struct pmcraid_cmd | |
3336 | * @buflen : length of the request buffer | |
3337 | * @direction : data transfer direction | |
3338 | * | |
3339 | * Return value | |
3340 | * 0 on sucess, non-zero error code on failure | |
3341 | */ | |
3342 | static int pmcraid_build_passthrough_ioadls( | |
3343 | struct pmcraid_cmd *cmd, | |
3344 | int buflen, | |
3345 | int direction | |
3346 | ) | |
3347 | { | |
3348 | struct pmcraid_sglist *sglist = NULL; | |
3349 | struct scatterlist *sg = NULL; | |
3350 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; | |
3351 | struct pmcraid_ioadl_desc *ioadl; | |
3352 | int i; | |
3353 | ||
3354 | sglist = pmcraid_alloc_sglist(buflen); | |
3355 | ||
3356 | if (!sglist) { | |
3357 | pmcraid_err("can't allocate memory for passthrough SGls\n"); | |
3358 | return -ENOMEM; | |
3359 | } | |
3360 | ||
3361 | sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev, | |
3362 | sglist->scatterlist, | |
3363 | sglist->num_sg, direction); | |
3364 | ||
3365 | if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) { | |
3366 | dev_err(&cmd->drv_inst->pdev->dev, | |
3367 | "Failed to map passthrough buffer!\n"); | |
3368 | pmcraid_free_sglist(sglist); | |
3369 | return -EIO; | |
3370 | } | |
3371 | ||
3372 | cmd->sglist = sglist; | |
3373 | ioarcb->request_flags0 |= NO_LINK_DESCS; | |
3374 | ||
3375 | ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg); | |
3376 | ||
3377 | /* Initialize IOADL descriptor addresses */ | |
3378 | for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) { | |
3379 | ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg)); | |
3380 | ioadl[i].address = cpu_to_le64(sg_dma_address(sg)); | |
3381 | ioadl[i].flags = 0; | |
3382 | } | |
3383 | ||
3384 | /* setup the last descriptor */ | |
3385 | ioadl[i - 1].flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC); | |
3386 | ||
3387 | return 0; | |
3388 | } | |
3389 | ||
3390 | ||
3391 | /** | |
3392 | * pmcraid_release_passthrough_ioadls - release passthrough ioadls | |
3393 | * | |
3394 | * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated | |
3395 | * @buflen: size of the request buffer | |
3396 | * @direction: data transfer direction | |
3397 | * | |
3398 | * Return value | |
3399 | * 0 on sucess, non-zero error code on failure | |
3400 | */ | |
3401 | static void pmcraid_release_passthrough_ioadls( | |
3402 | struct pmcraid_cmd *cmd, | |
3403 | int buflen, | |
3404 | int direction | |
3405 | ) | |
3406 | { | |
3407 | struct pmcraid_sglist *sglist = cmd->sglist; | |
3408 | ||
3409 | if (buflen > 0) { | |
3410 | pci_unmap_sg(cmd->drv_inst->pdev, | |
3411 | sglist->scatterlist, | |
3412 | sglist->num_sg, | |
3413 | direction); | |
3414 | pmcraid_free_sglist(sglist); | |
3415 | cmd->sglist = NULL; | |
3416 | } | |
3417 | } | |
3418 | ||
3419 | /** | |
3420 | * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands | |
3421 | * | |
3422 | * @pinstance: pointer to adapter instance structure | |
3423 | * @cmd: ioctl code | |
3424 | * @arg: pointer to pmcraid_passthrough_buffer user buffer | |
3425 | * | |
3426 | * Return value | |
3427 | * 0 on sucess, non-zero error code on failure | |
3428 | */ | |
3429 | static long pmcraid_ioctl_passthrough( | |
3430 | struct pmcraid_instance *pinstance, | |
3431 | unsigned int ioctl_cmd, | |
3432 | unsigned int buflen, | |
3433 | unsigned long arg | |
3434 | ) | |
3435 | { | |
3436 | struct pmcraid_passthrough_ioctl_buffer *buffer; | |
3437 | struct pmcraid_ioarcb *ioarcb; | |
3438 | struct pmcraid_cmd *cmd; | |
3439 | struct pmcraid_cmd *cancel_cmd; | |
3440 | unsigned long request_buffer; | |
3441 | unsigned long request_offset; | |
3442 | unsigned long lock_flags; | |
3443 | int request_size; | |
3444 | int buffer_size; | |
3445 | u8 access, direction; | |
3446 | int rc = 0; | |
3447 | ||
3448 | /* If IOA reset is in progress, wait 10 secs for reset to complete */ | |
3449 | if (pinstance->ioa_reset_in_progress) { | |
3450 | rc = wait_event_interruptible_timeout( | |
3451 | pinstance->reset_wait_q, | |
3452 | !pinstance->ioa_reset_in_progress, | |
3453 | msecs_to_jiffies(10000)); | |
3454 | ||
3455 | if (!rc) | |
3456 | return -ETIMEDOUT; | |
3457 | else if (rc < 0) | |
3458 | return -ERESTARTSYS; | |
3459 | } | |
3460 | ||
3461 | /* If adapter is not in operational state, return error */ | |
3462 | if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) { | |
3463 | pmcraid_err("IOA is not operational\n"); | |
3464 | return -ENOTTY; | |
3465 | } | |
3466 | ||
3467 | buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer); | |
3468 | buffer = kmalloc(buffer_size, GFP_KERNEL); | |
3469 | ||
3470 | if (!buffer) { | |
3471 | pmcraid_err("no memory for passthrough buffer\n"); | |
3472 | return -ENOMEM; | |
3473 | } | |
3474 | ||
3475 | request_offset = | |
3476 | offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer); | |
3477 | ||
3478 | request_buffer = arg + request_offset; | |
3479 | ||
3480 | rc = __copy_from_user(buffer, | |
3481 | (struct pmcraid_passthrough_ioctl_buffer *) arg, | |
3482 | sizeof(struct pmcraid_passthrough_ioctl_buffer)); | |
3483 | if (rc) { | |
3484 | pmcraid_err("ioctl: can't copy passthrough buffer\n"); | |
3485 | rc = -EFAULT; | |
3486 | goto out_free_buffer; | |
3487 | } | |
3488 | ||
3489 | request_size = buffer->ioarcb.data_transfer_length; | |
3490 | ||
3491 | if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) { | |
3492 | access = VERIFY_READ; | |
3493 | direction = DMA_TO_DEVICE; | |
3494 | } else { | |
3495 | access = VERIFY_WRITE; | |
3496 | direction = DMA_FROM_DEVICE; | |
3497 | } | |
3498 | ||
3499 | if (request_size > 0) { | |
3500 | rc = access_ok(access, arg, request_offset + request_size); | |
3501 | ||
3502 | if (!rc) { | |
3503 | rc = -EFAULT; | |
3504 | goto out_free_buffer; | |
3505 | } | |
3506 | } | |
3507 | ||
3508 | /* check if we have any additional command parameters */ | |
3509 | if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) { | |
3510 | rc = -EINVAL; | |
3511 | goto out_free_buffer; | |
3512 | } | |
3513 | ||
3514 | cmd = pmcraid_get_free_cmd(pinstance); | |
3515 | ||
3516 | if (!cmd) { | |
3517 | pmcraid_err("free command block is not available\n"); | |
3518 | rc = -ENOMEM; | |
3519 | goto out_free_buffer; | |
3520 | } | |
3521 | ||
3522 | cmd->scsi_cmd = NULL; | |
3523 | ioarcb = &(cmd->ioa_cb->ioarcb); | |
3524 | ||
3525 | /* Copy the user-provided IOARCB stuff field by field */ | |
3526 | ioarcb->resource_handle = buffer->ioarcb.resource_handle; | |
3527 | ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length; | |
3528 | ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout; | |
3529 | ioarcb->request_type = buffer->ioarcb.request_type; | |
3530 | ioarcb->request_flags0 = buffer->ioarcb.request_flags0; | |
3531 | ioarcb->request_flags1 = buffer->ioarcb.request_flags1; | |
3532 | memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN); | |
3533 | ||
3534 | if (buffer->ioarcb.add_cmd_param_length) { | |
3535 | ioarcb->add_cmd_param_length = | |
3536 | buffer->ioarcb.add_cmd_param_length; | |
3537 | ioarcb->add_cmd_param_offset = | |
3538 | buffer->ioarcb.add_cmd_param_offset; | |
3539 | memcpy(ioarcb->add_data.u.add_cmd_params, | |
3540 | buffer->ioarcb.add_data.u.add_cmd_params, | |
3541 | buffer->ioarcb.add_cmd_param_length); | |
3542 | } | |
3543 | ||
3544 | if (request_size) { | |
3545 | rc = pmcraid_build_passthrough_ioadls(cmd, | |
3546 | request_size, | |
3547 | direction); | |
3548 | if (rc) { | |
3549 | pmcraid_err("couldn't build passthrough ioadls\n"); | |
3550 | goto out_free_buffer; | |
3551 | } | |
3552 | } | |
3553 | ||
3554 | /* If data is being written into the device, copy the data from user | |
3555 | * buffers | |
3556 | */ | |
3557 | if (direction == DMA_TO_DEVICE && request_size > 0) { | |
3558 | rc = pmcraid_copy_sglist(cmd->sglist, | |
3559 | request_buffer, | |
3560 | request_size, | |
3561 | direction); | |
3562 | if (rc) { | |
3563 | pmcraid_err("failed to copy user buffer\n"); | |
3564 | goto out_free_sglist; | |
3565 | } | |
3566 | } | |
3567 | ||
3568 | /* passthrough ioctl is a blocking command so, put the user to sleep | |
3569 | * until timeout. Note that a timeout value of 0 means, do timeout. | |
3570 | */ | |
3571 | cmd->cmd_done = pmcraid_internal_done; | |
3572 | init_completion(&cmd->wait_for_completion); | |
3573 | cmd->completion_req = 1; | |
3574 | ||
3575 | pmcraid_info("command(%d) (CDB[0] = %x) for %x\n", | |
3576 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2, | |
3577 | cmd->ioa_cb->ioarcb.cdb[0], | |
3578 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle)); | |
3579 | ||
3580 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
3581 | _pmcraid_fire_command(cmd); | |
3582 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
3583 | ||
3584 | /* If command timeout is specified put caller to wait till that time, | |
3585 | * otherwise it would be blocking wait. If command gets timed out, it | |
3586 | * will be aborted. | |
3587 | */ | |
3588 | if (buffer->ioarcb.cmd_timeout == 0) { | |
3589 | wait_for_completion(&cmd->wait_for_completion); | |
3590 | } else if (!wait_for_completion_timeout( | |
3591 | &cmd->wait_for_completion, | |
3592 | msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) { | |
3593 | ||
3594 | pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n", | |
3595 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2), | |
3596 | cmd->ioa_cb->ioarcb.cdb[0]); | |
3597 | ||
3598 | rc = -ETIMEDOUT; | |
3599 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
3600 | cancel_cmd = pmcraid_abort_cmd(cmd); | |
3601 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
3602 | ||
3603 | if (cancel_cmd) { | |
3604 | wait_for_completion(&cancel_cmd->wait_for_completion); | |
3605 | pmcraid_return_cmd(cancel_cmd); | |
3606 | } | |
3607 | ||
3608 | goto out_free_sglist; | |
3609 | } | |
3610 | ||
3611 | /* If the command failed for any reason, copy entire IOASA buffer and | |
3612 | * return IOCTL success. If copying IOASA to user-buffer fails, return | |
3613 | * EFAULT | |
3614 | */ | |
3615 | if (le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)) { | |
3616 | ||
3617 | void *ioasa = | |
3618 | (void *)(arg + | |
3619 | offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa)); | |
3620 | ||
3621 | pmcraid_info("command failed with %x\n", | |
3622 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); | |
3623 | if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa, | |
3624 | sizeof(struct pmcraid_ioasa))) { | |
3625 | pmcraid_err("failed to copy ioasa buffer to user\n"); | |
3626 | rc = -EFAULT; | |
3627 | } | |
3628 | } | |
3629 | /* If the data transfer was from device, copy the data onto user | |
3630 | * buffers | |
3631 | */ | |
3632 | else if (direction == DMA_FROM_DEVICE && request_size > 0) { | |
3633 | rc = pmcraid_copy_sglist(cmd->sglist, | |
3634 | request_buffer, | |
3635 | request_size, | |
3636 | direction); | |
3637 | if (rc) { | |
3638 | pmcraid_err("failed to copy user buffer\n"); | |
3639 | rc = -EFAULT; | |
3640 | } | |
3641 | } | |
3642 | ||
3643 | out_free_sglist: | |
3644 | pmcraid_release_passthrough_ioadls(cmd, request_size, direction); | |
3645 | pmcraid_return_cmd(cmd); | |
3646 | ||
3647 | out_free_buffer: | |
3648 | kfree(buffer); | |
3649 | ||
3650 | return rc; | |
3651 | } | |
3652 | ||
3653 | ||
3654 | ||
3655 | ||
3656 | /** | |
3657 | * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself | |
3658 | * | |
3659 | * @pinstance: pointer to adapter instance structure | |
3660 | * @cmd: ioctl command passed in | |
3661 | * @buflen: length of user_buffer | |
3662 | * @user_buffer: user buffer pointer | |
3663 | * | |
3664 | * Return Value | |
3665 | * 0 in case of success, otherwise appropriate error code | |
3666 | */ | |
3667 | static long pmcraid_ioctl_driver( | |
3668 | struct pmcraid_instance *pinstance, | |
3669 | unsigned int cmd, | |
3670 | unsigned int buflen, | |
3671 | void __user *user_buffer | |
3672 | ) | |
3673 | { | |
3674 | int rc = -ENOSYS; | |
3675 | ||
3676 | if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) { | |
3677 | pmcraid_err("ioctl_driver: access fault in request buffer \n"); | |
3678 | return -EFAULT; | |
3679 | } | |
3680 | ||
3681 | switch (cmd) { | |
3682 | case PMCRAID_IOCTL_RESET_ADAPTER: | |
3683 | pmcraid_reset_bringup(pinstance); | |
3684 | rc = 0; | |
3685 | break; | |
3686 | ||
3687 | default: | |
3688 | break; | |
3689 | } | |
3690 | ||
3691 | return rc; | |
3692 | } | |
3693 | ||
3694 | /** | |
3695 | * pmcraid_check_ioctl_buffer - check for proper access to user buffer | |
3696 | * | |
3697 | * @cmd: ioctl command | |
3698 | * @arg: user buffer | |
3699 | * @hdr: pointer to kernel memory for pmcraid_ioctl_header | |
3700 | * | |
3701 | * Return Value | |
3702 | * negetive error code if there are access issues, otherwise zero. | |
3703 | * Upon success, returns ioctl header copied out of user buffer. | |
3704 | */ | |
3705 | ||
3706 | static int pmcraid_check_ioctl_buffer( | |
3707 | int cmd, | |
3708 | void __user *arg, | |
3709 | struct pmcraid_ioctl_header *hdr | |
3710 | ) | |
3711 | { | |
3712 | int rc = 0; | |
3713 | int access = VERIFY_READ; | |
3714 | ||
3715 | if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) { | |
3716 | pmcraid_err("couldn't copy ioctl header from user buffer\n"); | |
3717 | return -EFAULT; | |
3718 | } | |
3719 | ||
3720 | /* check for valid driver signature */ | |
3721 | rc = memcmp(hdr->signature, | |
3722 | PMCRAID_IOCTL_SIGNATURE, | |
3723 | sizeof(hdr->signature)); | |
3724 | if (rc) { | |
3725 | pmcraid_err("signature verification failed\n"); | |
3726 | return -EINVAL; | |
3727 | } | |
3728 | ||
3729 | /* buffer length can't be negetive */ | |
3730 | if (hdr->buffer_length < 0) { | |
3731 | pmcraid_err("ioctl: invalid buffer length specified\n"); | |
3732 | return -EINVAL; | |
3733 | } | |
3734 | ||
3735 | /* check for appropriate buffer access */ | |
3736 | if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ) | |
3737 | access = VERIFY_WRITE; | |
3738 | ||
3739 | rc = access_ok(access, | |
3740 | (arg + sizeof(struct pmcraid_ioctl_header)), | |
3741 | hdr->buffer_length); | |
3742 | if (!rc) { | |
3743 | pmcraid_err("access failed for user buffer of size %d\n", | |
3744 | hdr->buffer_length); | |
3745 | return -EFAULT; | |
3746 | } | |
3747 | ||
3748 | return 0; | |
3749 | } | |
3750 | ||
3751 | /** | |
3752 | * pmcraid_ioctl - char node ioctl entry point | |
3753 | */ | |
3754 | static long pmcraid_chr_ioctl( | |
3755 | struct file *filep, | |
3756 | unsigned int cmd, | |
3757 | unsigned long arg | |
3758 | ) | |
3759 | { | |
3760 | struct pmcraid_instance *pinstance = NULL; | |
3761 | struct pmcraid_ioctl_header *hdr = NULL; | |
3762 | int retval = -ENOTTY; | |
3763 | ||
3764 | hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header)); | |
3765 | ||
3766 | if (!hdr) { | |
3767 | pmcraid_err("faile to allocate memory for ioctl header\n"); | |
3768 | return -ENOMEM; | |
3769 | } | |
3770 | ||
3771 | retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr); | |
3772 | ||
3773 | if (retval) { | |
3774 | pmcraid_info("chr_ioctl: header check failed\n"); | |
3775 | kfree(hdr); | |
3776 | return retval; | |
3777 | } | |
3778 | ||
3779 | pinstance = (struct pmcraid_instance *)filep->private_data; | |
3780 | ||
3781 | if (!pinstance) { | |
3782 | pmcraid_info("adapter instance is not found\n"); | |
3783 | kfree(hdr); | |
3784 | return -ENOTTY; | |
3785 | } | |
3786 | ||
3787 | switch (_IOC_TYPE(cmd)) { | |
3788 | ||
3789 | case PMCRAID_PASSTHROUGH_IOCTL: | |
3790 | /* If ioctl code is to download microcode, we need to block | |
3791 | * mid-layer requests. | |
3792 | */ | |
3793 | if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE) | |
3794 | scsi_block_requests(pinstance->host); | |
3795 | ||
3796 | retval = pmcraid_ioctl_passthrough(pinstance, | |
3797 | cmd, | |
3798 | hdr->buffer_length, | |
3799 | arg); | |
3800 | ||
3801 | if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE) | |
3802 | scsi_unblock_requests(pinstance->host); | |
3803 | break; | |
3804 | ||
3805 | case PMCRAID_DRIVER_IOCTL: | |
3806 | arg += sizeof(struct pmcraid_ioctl_header); | |
3807 | retval = pmcraid_ioctl_driver(pinstance, | |
3808 | cmd, | |
3809 | hdr->buffer_length, | |
3810 | (void __user *)arg); | |
3811 | break; | |
3812 | ||
3813 | default: | |
3814 | retval = -ENOTTY; | |
3815 | break; | |
3816 | } | |
3817 | ||
3818 | kfree(hdr); | |
3819 | ||
3820 | return retval; | |
3821 | } | |
3822 | ||
3823 | /** | |
3824 | * File operations structure for management interface | |
3825 | */ | |
3826 | static const struct file_operations pmcraid_fops = { | |
3827 | .owner = THIS_MODULE, | |
3828 | .open = pmcraid_chr_open, | |
3829 | .release = pmcraid_chr_release, | |
3830 | .fasync = pmcraid_chr_fasync, | |
3831 | .unlocked_ioctl = pmcraid_chr_ioctl, | |
3832 | #ifdef CONFIG_COMPAT | |
3833 | .compat_ioctl = pmcraid_chr_ioctl, | |
3834 | #endif | |
3835 | }; | |
3836 | ||
3837 | ||
3838 | ||
3839 | ||
3840 | /** | |
3841 | * pmcraid_show_log_level - Display adapter's error logging level | |
3842 | * @dev: class device struct | |
3843 | * @buf: buffer | |
3844 | * | |
3845 | * Return value: | |
3846 | * number of bytes printed to buffer | |
3847 | */ | |
3848 | static ssize_t pmcraid_show_log_level( | |
3849 | struct device *dev, | |
3850 | struct device_attribute *attr, | |
3851 | char *buf) | |
3852 | { | |
3853 | struct Scsi_Host *shost = class_to_shost(dev); | |
3854 | struct pmcraid_instance *pinstance = | |
3855 | (struct pmcraid_instance *)shost->hostdata; | |
3856 | return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level); | |
3857 | } | |
3858 | ||
3859 | /** | |
3860 | * pmcraid_store_log_level - Change the adapter's error logging level | |
3861 | * @dev: class device struct | |
3862 | * @buf: buffer | |
3863 | * @count: not used | |
3864 | * | |
3865 | * Return value: | |
3866 | * number of bytes printed to buffer | |
3867 | */ | |
3868 | static ssize_t pmcraid_store_log_level( | |
3869 | struct device *dev, | |
3870 | struct device_attribute *attr, | |
3871 | const char *buf, | |
3872 | size_t count | |
3873 | ) | |
3874 | { | |
3875 | struct Scsi_Host *shost; | |
3876 | struct pmcraid_instance *pinstance; | |
3877 | unsigned long val; | |
3878 | ||
3879 | if (strict_strtoul(buf, 10, &val)) | |
3880 | return -EINVAL; | |
3881 | /* log-level should be from 0 to 2 */ | |
3882 | if (val > 2) | |
3883 | return -EINVAL; | |
3884 | ||
3885 | shost = class_to_shost(dev); | |
3886 | pinstance = (struct pmcraid_instance *)shost->hostdata; | |
3887 | pinstance->current_log_level = val; | |
3888 | ||
3889 | return strlen(buf); | |
3890 | } | |
3891 | ||
3892 | static struct device_attribute pmcraid_log_level_attr = { | |
3893 | .attr = { | |
3894 | .name = "log_level", | |
3895 | .mode = S_IRUGO | S_IWUSR, | |
3896 | }, | |
3897 | .show = pmcraid_show_log_level, | |
3898 | .store = pmcraid_store_log_level, | |
3899 | }; | |
3900 | ||
3901 | /** | |
3902 | * pmcraid_show_drv_version - Display driver version | |
3903 | * @dev: class device struct | |
3904 | * @buf: buffer | |
3905 | * | |
3906 | * Return value: | |
3907 | * number of bytes printed to buffer | |
3908 | */ | |
3909 | static ssize_t pmcraid_show_drv_version( | |
3910 | struct device *dev, | |
3911 | struct device_attribute *attr, | |
3912 | char *buf | |
3913 | ) | |
3914 | { | |
3915 | return snprintf(buf, PAGE_SIZE, "version: %s, build date: %s\n", | |
3916 | PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE); | |
3917 | } | |
3918 | ||
3919 | static struct device_attribute pmcraid_driver_version_attr = { | |
3920 | .attr = { | |
3921 | .name = "drv_version", | |
3922 | .mode = S_IRUGO, | |
3923 | }, | |
3924 | .show = pmcraid_show_drv_version, | |
3925 | }; | |
3926 | ||
3927 | /** | |
3928 | * pmcraid_show_io_adapter_id - Display driver assigned adapter id | |
3929 | * @dev: class device struct | |
3930 | * @buf: buffer | |
3931 | * | |
3932 | * Return value: | |
3933 | * number of bytes printed to buffer | |
3934 | */ | |
3935 | static ssize_t pmcraid_show_adapter_id( | |
3936 | struct device *dev, | |
3937 | struct device_attribute *attr, | |
3938 | char *buf | |
3939 | ) | |
3940 | { | |
3941 | struct Scsi_Host *shost = class_to_shost(dev); | |
3942 | struct pmcraid_instance *pinstance = | |
3943 | (struct pmcraid_instance *)shost->hostdata; | |
3944 | u32 adapter_id = (pinstance->pdev->bus->number << 8) | | |
3945 | pinstance->pdev->devfn; | |
3946 | u32 aen_group = pmcraid_event_family.id; | |
3947 | ||
3948 | return snprintf(buf, PAGE_SIZE, | |
3949 | "adapter id: %d\nminor: %d\naen group: %d\n", | |
3950 | adapter_id, MINOR(pinstance->cdev.dev), aen_group); | |
3951 | } | |
3952 | ||
3953 | static struct device_attribute pmcraid_adapter_id_attr = { | |
3954 | .attr = { | |
3955 | .name = "adapter_id", | |
3956 | .mode = S_IRUGO | S_IWUSR, | |
3957 | }, | |
3958 | .show = pmcraid_show_adapter_id, | |
3959 | }; | |
3960 | ||
3961 | static struct device_attribute *pmcraid_host_attrs[] = { | |
3962 | &pmcraid_log_level_attr, | |
3963 | &pmcraid_driver_version_attr, | |
3964 | &pmcraid_adapter_id_attr, | |
3965 | NULL, | |
3966 | }; | |
3967 | ||
3968 | ||
3969 | /* host template structure for pmcraid driver */ | |
3970 | static struct scsi_host_template pmcraid_host_template = { | |
3971 | .module = THIS_MODULE, | |
3972 | .name = PMCRAID_DRIVER_NAME, | |
3973 | .queuecommand = pmcraid_queuecommand, | |
3974 | .eh_abort_handler = pmcraid_eh_abort_handler, | |
3975 | .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler, | |
3976 | .eh_target_reset_handler = pmcraid_eh_target_reset_handler, | |
3977 | .eh_device_reset_handler = pmcraid_eh_device_reset_handler, | |
3978 | .eh_host_reset_handler = pmcraid_eh_host_reset_handler, | |
3979 | ||
3980 | .slave_alloc = pmcraid_slave_alloc, | |
3981 | .slave_configure = pmcraid_slave_configure, | |
3982 | .slave_destroy = pmcraid_slave_destroy, | |
3983 | .change_queue_depth = pmcraid_change_queue_depth, | |
3984 | .change_queue_type = pmcraid_change_queue_type, | |
3985 | .can_queue = PMCRAID_MAX_IO_CMD, | |
3986 | .this_id = -1, | |
3987 | .sg_tablesize = PMCRAID_MAX_IOADLS, | |
3988 | .max_sectors = PMCRAID_IOA_MAX_SECTORS, | |
3989 | .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN, | |
3990 | .use_clustering = ENABLE_CLUSTERING, | |
3991 | .shost_attrs = pmcraid_host_attrs, | |
3992 | .proc_name = PMCRAID_DRIVER_NAME | |
3993 | }; | |
3994 | ||
3995 | /** | |
3996 | * pmcraid_isr_common - Common interrupt handler routine | |
3997 | * | |
3998 | * @pinstance: pointer to adapter instance | |
3999 | * @intrs: active interrupts (contents of ioa_host_interrupt register) | |
4000 | * @hrrq_id: Host RRQ index | |
4001 | * | |
4002 | * Return Value | |
4003 | * none | |
4004 | */ | |
4005 | static void pmcraid_isr_common( | |
4006 | struct pmcraid_instance *pinstance, | |
4007 | u32 intrs, | |
4008 | int hrrq_id | |
4009 | ) | |
4010 | { | |
4011 | u32 intrs_clear = | |
4012 | (intrs & INTRS_CRITICAL_OP_IN_PROGRESS) ? intrs | |
4013 | : INTRS_HRRQ_VALID; | |
4014 | iowrite32(intrs_clear, | |
4015 | pinstance->int_regs.ioa_host_interrupt_clr_reg); | |
4016 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); | |
4017 | ||
4018 | /* hrrq valid bit was set, schedule tasklet to handle the response */ | |
4019 | if (intrs_clear == INTRS_HRRQ_VALID) | |
4020 | tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id])); | |
4021 | } | |
4022 | ||
4023 | /** | |
4024 | * pmcraid_isr - implements interrupt handling routine | |
4025 | * | |
4026 | * @irq: interrupt vector number | |
4027 | * @dev_id: pointer hrrq_vector | |
4028 | * | |
4029 | * Return Value | |
4030 | * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored | |
4031 | */ | |
4032 | static irqreturn_t pmcraid_isr(int irq, void *dev_id) | |
4033 | { | |
4034 | struct pmcraid_isr_param *hrrq_vector; | |
4035 | struct pmcraid_instance *pinstance; | |
4036 | unsigned long lock_flags; | |
4037 | u32 intrs; | |
4038 | ||
4039 | /* In case of legacy interrupt mode where interrupts are shared across | |
4040 | * isrs, it may be possible that the current interrupt is not from IOA | |
4041 | */ | |
4042 | if (!dev_id) { | |
4043 | printk(KERN_INFO "%s(): NULL host pointer\n", __func__); | |
4044 | return IRQ_NONE; | |
4045 | } | |
4046 | ||
4047 | hrrq_vector = (struct pmcraid_isr_param *)dev_id; | |
4048 | pinstance = hrrq_vector->drv_inst; | |
4049 | ||
4050 | /* Acquire the lock (currently host_lock) while processing interrupts. | |
4051 | * This interval is small as most of the response processing is done by | |
4052 | * tasklet without the lock. | |
4053 | */ | |
4054 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); | |
4055 | intrs = pmcraid_read_interrupts(pinstance); | |
4056 | ||
4057 | if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0)) { | |
4058 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
4059 | return IRQ_NONE; | |
4060 | } | |
4061 | ||
4062 | /* Any error interrupts including unit_check, initiate IOA reset. | |
4063 | * In case of unit check indicate to reset_sequence that IOA unit | |
4064 | * checked and prepare for a dump during reset sequence | |
4065 | */ | |
4066 | if (intrs & PMCRAID_ERROR_INTERRUPTS) { | |
4067 | ||
4068 | if (intrs & INTRS_IOA_UNIT_CHECK) | |
4069 | pinstance->ioa_unit_check = 1; | |
4070 | ||
4071 | iowrite32(intrs, | |
4072 | pinstance->int_regs.ioa_host_interrupt_clr_reg); | |
4073 | pmcraid_err("ISR: error interrupts: %x initiating reset\n", | |
4074 | intrs); | |
4075 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); | |
4076 | pmcraid_initiate_reset(pinstance); | |
4077 | } else { | |
4078 | pmcraid_isr_common(pinstance, intrs, hrrq_vector->hrrq_id); | |
4079 | } | |
4080 | ||
4081 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); | |
4082 | ||
4083 | return IRQ_HANDLED; | |
4084 | } | |
4085 | ||
4086 | ||
4087 | /** | |
4088 | * pmcraid_worker_function - worker thread function | |
4089 | * | |
4090 | * @workp: pointer to struct work queue | |
4091 | * | |
4092 | * Return Value | |
4093 | * None | |
4094 | */ | |
4095 | ||
4096 | static void pmcraid_worker_function(struct work_struct *workp) | |
4097 | { | |
4098 | struct pmcraid_instance *pinstance; | |
4099 | struct pmcraid_resource_entry *res; | |
4100 | struct pmcraid_resource_entry *temp; | |
4101 | struct scsi_device *sdev; | |
4102 | unsigned long lock_flags; | |
4103 | unsigned long host_lock_flags; | |
4104 | u8 bus, target, lun; | |
4105 | ||
4106 | pinstance = container_of(workp, struct pmcraid_instance, worker_q); | |
4107 | /* add resources only after host is added into system */ | |
4108 | if (!atomic_read(&pinstance->expose_resources)) | |
4109 | return; | |
4110 | ||
4111 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); | |
4112 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) { | |
4113 | ||
4114 | if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) { | |
4115 | sdev = res->scsi_dev; | |
4116 | ||
4117 | /* host_lock must be held before calling | |
4118 | * scsi_device_get | |
4119 | */ | |
4120 | spin_lock_irqsave(pinstance->host->host_lock, | |
4121 | host_lock_flags); | |
4122 | if (!scsi_device_get(sdev)) { | |
4123 | spin_unlock_irqrestore( | |
4124 | pinstance->host->host_lock, | |
4125 | host_lock_flags); | |
4126 | pmcraid_info("deleting %x from midlayer\n", | |
4127 | res->cfg_entry.resource_address); | |
4128 | list_move_tail(&res->queue, | |
4129 | &pinstance->free_res_q); | |
4130 | spin_unlock_irqrestore( | |
4131 | &pinstance->resource_lock, | |
4132 | lock_flags); | |
4133 | scsi_remove_device(sdev); | |
4134 | scsi_device_put(sdev); | |
4135 | spin_lock_irqsave(&pinstance->resource_lock, | |
4136 | lock_flags); | |
4137 | res->change_detected = 0; | |
4138 | } else { | |
4139 | spin_unlock_irqrestore( | |
4140 | pinstance->host->host_lock, | |
4141 | host_lock_flags); | |
4142 | } | |
4143 | } | |
4144 | } | |
4145 | ||
4146 | list_for_each_entry(res, &pinstance->used_res_q, queue) { | |
4147 | ||
4148 | if (res->change_detected == RES_CHANGE_ADD) { | |
4149 | ||
4150 | if (!pmcraid_expose_resource(&res->cfg_entry)) | |
4151 | continue; | |
4152 | ||
4153 | if (RES_IS_VSET(res->cfg_entry)) { | |
4154 | bus = PMCRAID_VSET_BUS_ID; | |
4155 | target = res->cfg_entry.unique_flags1; | |
4156 | lun = PMCRAID_VSET_LUN_ID; | |
4157 | } else { | |
4158 | bus = PMCRAID_PHYS_BUS_ID; | |
4159 | target = | |
4160 | RES_TARGET( | |
4161 | res->cfg_entry.resource_address); | |
4162 | lun = RES_LUN(res->cfg_entry.resource_address); | |
4163 | } | |
4164 | ||
4165 | res->change_detected = 0; | |
4166 | spin_unlock_irqrestore(&pinstance->resource_lock, | |
4167 | lock_flags); | |
4168 | scsi_add_device(pinstance->host, bus, target, lun); | |
4169 | spin_lock_irqsave(&pinstance->resource_lock, | |
4170 | lock_flags); | |
4171 | } | |
4172 | } | |
4173 | ||
4174 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); | |
4175 | } | |
4176 | ||
4177 | /** | |
4178 | * pmcraid_tasklet_function - Tasklet function | |
4179 | * | |
4180 | * @instance: pointer to msix param structure | |
4181 | * | |
4182 | * Return Value | |
4183 | * None | |
4184 | */ | |
4185 | void pmcraid_tasklet_function(unsigned long instance) | |
4186 | { | |
4187 | struct pmcraid_isr_param *hrrq_vector; | |
4188 | struct pmcraid_instance *pinstance; | |
4189 | unsigned long hrrq_lock_flags; | |
4190 | unsigned long pending_lock_flags; | |
4191 | unsigned long host_lock_flags; | |
4192 | spinlock_t *lockp; /* hrrq buffer lock */ | |
4193 | int id; | |
4194 | u32 intrs; | |
4195 | __le32 resp; | |
4196 | ||
4197 | hrrq_vector = (struct pmcraid_isr_param *)instance; | |
4198 | pinstance = hrrq_vector->drv_inst; | |
4199 | id = hrrq_vector->hrrq_id; | |
4200 | lockp = &(pinstance->hrrq_lock[id]); | |
4201 | intrs = pmcraid_read_interrupts(pinstance); | |
4202 | ||
4203 | /* If interrupts was as part of the ioa initialization, clear and mask | |
4204 | * it. Delete the timer and wakeup the reset engine to proceed with | |
4205 | * reset sequence | |
4206 | */ | |
4207 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) { | |
4208 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, | |
4209 | pinstance->int_regs.ioa_host_interrupt_mask_reg); | |
4210 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, | |
4211 | pinstance->int_regs.ioa_host_interrupt_clr_reg); | |
4212 | ||
4213 | if (pinstance->reset_cmd != NULL) { | |
4214 | del_timer(&pinstance->reset_cmd->timer); | |
4215 | spin_lock_irqsave(pinstance->host->host_lock, | |
4216 | host_lock_flags); | |
4217 | pinstance->reset_cmd->cmd_done(pinstance->reset_cmd); | |
4218 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
4219 | host_lock_flags); | |
4220 | } | |
4221 | return; | |
4222 | } | |
4223 | ||
4224 | /* loop through each of the commands responded by IOA. Each HRRQ buf is | |
4225 | * protected by its own lock. Traversals must be done within this lock | |
4226 | * as there may be multiple tasklets running on multiple CPUs. Note | |
4227 | * that the lock is held just for picking up the response handle and | |
4228 | * manipulating hrrq_curr/toggle_bit values. | |
4229 | */ | |
4230 | spin_lock_irqsave(lockp, hrrq_lock_flags); | |
4231 | ||
4232 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); | |
4233 | ||
4234 | while ((resp & HRRQ_TOGGLE_BIT) == | |
4235 | pinstance->host_toggle_bit[id]) { | |
4236 | ||
4237 | int cmd_index = resp >> 2; | |
4238 | struct pmcraid_cmd *cmd = NULL; | |
4239 | ||
4240 | if (cmd_index < PMCRAID_MAX_CMD) { | |
4241 | cmd = pinstance->cmd_list[cmd_index]; | |
4242 | } else { | |
4243 | /* In case of invalid response handle, initiate IOA | |
4244 | * reset sequence. | |
4245 | */ | |
4246 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); | |
4247 | ||
4248 | pmcraid_err("Invalid response %d initiating reset\n", | |
4249 | cmd_index); | |
4250 | ||
4251 | spin_lock_irqsave(pinstance->host->host_lock, | |
4252 | host_lock_flags); | |
4253 | pmcraid_initiate_reset(pinstance); | |
4254 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
4255 | host_lock_flags); | |
4256 | ||
4257 | spin_lock_irqsave(lockp, hrrq_lock_flags); | |
4258 | break; | |
4259 | } | |
4260 | ||
4261 | if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) { | |
4262 | pinstance->hrrq_curr[id]++; | |
4263 | } else { | |
4264 | pinstance->hrrq_curr[id] = pinstance->hrrq_start[id]; | |
4265 | pinstance->host_toggle_bit[id] ^= 1u; | |
4266 | } | |
4267 | ||
4268 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); | |
4269 | ||
4270 | spin_lock_irqsave(&pinstance->pending_pool_lock, | |
4271 | pending_lock_flags); | |
4272 | list_del(&cmd->free_list); | |
4273 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, | |
4274 | pending_lock_flags); | |
4275 | del_timer(&cmd->timer); | |
4276 | atomic_dec(&pinstance->outstanding_cmds); | |
4277 | ||
4278 | if (cmd->cmd_done == pmcraid_ioa_reset) { | |
4279 | spin_lock_irqsave(pinstance->host->host_lock, | |
4280 | host_lock_flags); | |
4281 | cmd->cmd_done(cmd); | |
4282 | spin_unlock_irqrestore(pinstance->host->host_lock, | |
4283 | host_lock_flags); | |
4284 | } else if (cmd->cmd_done != NULL) { | |
4285 | cmd->cmd_done(cmd); | |
4286 | } | |
4287 | /* loop over until we are done with all responses */ | |
4288 | spin_lock_irqsave(lockp, hrrq_lock_flags); | |
4289 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); | |
4290 | } | |
4291 | ||
4292 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); | |
4293 | } | |
4294 | ||
4295 | /** | |
4296 | * pmcraid_unregister_interrupt_handler - de-register interrupts handlers | |
4297 | * @pinstance: pointer to adapter instance structure | |
4298 | * | |
4299 | * This routine un-registers registered interrupt handler and | |
4300 | * also frees irqs/vectors. | |
4301 | * | |
4302 | * Retun Value | |
4303 | * None | |
4304 | */ | |
4305 | static | |
4306 | void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance) | |
4307 | { | |
4308 | free_irq(pinstance->pdev->irq, &(pinstance->hrrq_vector[0])); | |
4309 | } | |
4310 | ||
4311 | /** | |
4312 | * pmcraid_register_interrupt_handler - registers interrupt handler | |
4313 | * @pinstance: pointer to per-adapter instance structure | |
4314 | * | |
4315 | * Return Value | |
4316 | * 0 on success, non-zero error code otherwise. | |
4317 | */ | |
4318 | static int | |
4319 | pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance) | |
4320 | { | |
4321 | struct pci_dev *pdev = pinstance->pdev; | |
4322 | ||
4323 | pinstance->hrrq_vector[0].hrrq_id = 0; | |
4324 | pinstance->hrrq_vector[0].drv_inst = pinstance; | |
4325 | pinstance->hrrq_vector[0].vector = 0; | |
4326 | pinstance->num_hrrq = 1; | |
4327 | return request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED, | |
4328 | PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]); | |
4329 | } | |
4330 | ||
4331 | /** | |
4332 | * pmcraid_release_cmd_blocks - release buufers allocated for command blocks | |
4333 | * @pinstance: per adapter instance structure pointer | |
4334 | * @max_index: number of buffer blocks to release | |
4335 | * | |
4336 | * Return Value | |
4337 | * None | |
4338 | */ | |
4339 | static void | |
4340 | pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index) | |
4341 | { | |
4342 | int i; | |
4343 | for (i = 0; i < max_index; i++) { | |
4344 | kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]); | |
4345 | pinstance->cmd_list[i] = NULL; | |
4346 | } | |
4347 | kmem_cache_destroy(pinstance->cmd_cachep); | |
4348 | pinstance->cmd_cachep = NULL; | |
4349 | } | |
4350 | ||
4351 | /** | |
4352 | * pmcraid_release_control_blocks - releases buffers alloced for control blocks | |
4353 | * @pinstance: pointer to per adapter instance structure | |
4354 | * @max_index: number of buffers (from 0 onwards) to release | |
4355 | * | |
4356 | * This function assumes that the command blocks for which control blocks are | |
4357 | * linked are not released. | |
4358 | * | |
4359 | * Return Value | |
4360 | * None | |
4361 | */ | |
4362 | static void | |
4363 | pmcraid_release_control_blocks( | |
4364 | struct pmcraid_instance *pinstance, | |
4365 | int max_index | |
4366 | ) | |
4367 | { | |
4368 | int i; | |
4369 | ||
4370 | if (pinstance->control_pool == NULL) | |
4371 | return; | |
4372 | ||
4373 | for (i = 0; i < max_index; i++) { | |
4374 | pci_pool_free(pinstance->control_pool, | |
4375 | pinstance->cmd_list[i]->ioa_cb, | |
4376 | pinstance->cmd_list[i]->ioa_cb_bus_addr); | |
4377 | pinstance->cmd_list[i]->ioa_cb = NULL; | |
4378 | pinstance->cmd_list[i]->ioa_cb_bus_addr = 0; | |
4379 | } | |
4380 | pci_pool_destroy(pinstance->control_pool); | |
4381 | pinstance->control_pool = NULL; | |
4382 | } | |
4383 | ||
4384 | /** | |
4385 | * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures | |
4386 | * @pinstance - pointer to per adapter instance structure | |
4387 | * | |
4388 | * Allocates memory for command blocks using kernel slab allocator. | |
4389 | * | |
4390 | * Return Value | |
4391 | * 0 in case of success; -ENOMEM in case of failure | |
4392 | */ | |
4393 | static int __devinit | |
4394 | pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance) | |
4395 | { | |
4396 | int i; | |
4397 | ||
4398 | sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d", | |
4399 | pinstance->host->unique_id); | |
4400 | ||
4401 | ||
4402 | pinstance->cmd_cachep = kmem_cache_create( | |
4403 | pinstance->cmd_pool_name, | |
4404 | sizeof(struct pmcraid_cmd), 0, | |
4405 | SLAB_HWCACHE_ALIGN, NULL); | |
4406 | if (!pinstance->cmd_cachep) | |
4407 | return -ENOMEM; | |
4408 | ||
4409 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { | |
4410 | pinstance->cmd_list[i] = | |
4411 | kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL); | |
4412 | if (!pinstance->cmd_list[i]) { | |
4413 | pmcraid_release_cmd_blocks(pinstance, i); | |
4414 | return -ENOMEM; | |
4415 | } | |
4416 | } | |
4417 | return 0; | |
4418 | } | |
4419 | ||
4420 | /** | |
4421 | * pmcraid_allocate_control_blocks - allocates memory control blocks | |
4422 | * @pinstance : pointer to per adapter instance structure | |
4423 | * | |
4424 | * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs | |
4425 | * and IOASAs. This is called after command blocks are already allocated. | |
4426 | * | |
4427 | * Return Value | |
4428 | * 0 in case it can allocate all control blocks, otherwise -ENOMEM | |
4429 | */ | |
4430 | static int __devinit | |
4431 | pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance) | |
4432 | { | |
4433 | int i; | |
4434 | ||
4435 | sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d", | |
4436 | pinstance->host->unique_id); | |
4437 | ||
4438 | pinstance->control_pool = | |
4439 | pci_pool_create(pinstance->ctl_pool_name, | |
4440 | pinstance->pdev, | |
4441 | sizeof(struct pmcraid_control_block), | |
4442 | PMCRAID_IOARCB_ALIGNMENT, 0); | |
4443 | ||
4444 | if (!pinstance->control_pool) | |
4445 | return -ENOMEM; | |
4446 | ||
4447 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { | |
4448 | pinstance->cmd_list[i]->ioa_cb = | |
4449 | pci_pool_alloc( | |
4450 | pinstance->control_pool, | |
4451 | GFP_KERNEL, | |
4452 | &(pinstance->cmd_list[i]->ioa_cb_bus_addr)); | |
4453 | ||
4454 | if (!pinstance->cmd_list[i]->ioa_cb) { | |
4455 | pmcraid_release_control_blocks(pinstance, i); | |
4456 | return -ENOMEM; | |
4457 | } | |
4458 | memset(pinstance->cmd_list[i]->ioa_cb, 0, | |
4459 | sizeof(struct pmcraid_control_block)); | |
4460 | } | |
4461 | return 0; | |
4462 | } | |
4463 | ||
4464 | /** | |
4465 | * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s) | |
4466 | * @pinstance: pointer to per adapter instance structure | |
4467 | * @maxindex: size of hrrq buffer pointer array | |
4468 | * | |
4469 | * Return Value | |
4470 | * None | |
4471 | */ | |
4472 | static void | |
4473 | pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex) | |
4474 | { | |
4475 | int i; | |
4476 | for (i = 0; i < maxindex; i++) { | |
4477 | ||
4478 | pci_free_consistent(pinstance->pdev, | |
4479 | HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD, | |
4480 | pinstance->hrrq_start[i], | |
4481 | pinstance->hrrq_start_bus_addr[i]); | |
4482 | ||
4483 | /* reset pointers and toggle bit to zeros */ | |
4484 | pinstance->hrrq_start[i] = NULL; | |
4485 | pinstance->hrrq_start_bus_addr[i] = 0; | |
4486 | pinstance->host_toggle_bit[i] = 0; | |
4487 | } | |
4488 | } | |
4489 | ||
4490 | /** | |
4491 | * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers | |
4492 | * @pinstance: pointer to per adapter instance structure | |
4493 | * | |
4494 | * Return value | |
4495 | * 0 hrrq buffers are allocated, -ENOMEM otherwise. | |
4496 | */ | |
4497 | static int __devinit | |
4498 | pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance) | |
4499 | { | |
4500 | int i; | |
4501 | int buf_count = PMCRAID_MAX_CMD / pinstance->num_hrrq; | |
4502 | ||
4503 | for (i = 0; i < pinstance->num_hrrq; i++) { | |
4504 | int buffer_size = HRRQ_ENTRY_SIZE * buf_count; | |
4505 | ||
4506 | pinstance->hrrq_start[i] = | |
4507 | pci_alloc_consistent( | |
4508 | pinstance->pdev, | |
4509 | buffer_size, | |
4510 | &(pinstance->hrrq_start_bus_addr[i])); | |
4511 | ||
4512 | if (pinstance->hrrq_start[i] == 0) { | |
4513 | pmcraid_err("could not allocate host rrq: %d\n", i); | |
4514 | pmcraid_release_host_rrqs(pinstance, i); | |
4515 | return -ENOMEM; | |
4516 | } | |
4517 | ||
4518 | memset(pinstance->hrrq_start[i], 0, buffer_size); | |
4519 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i]; | |
4520 | pinstance->hrrq_end[i] = | |
4521 | pinstance->hrrq_start[i] + buf_count - 1; | |
4522 | pinstance->host_toggle_bit[i] = 1; | |
4523 | spin_lock_init(&pinstance->hrrq_lock[i]); | |
4524 | } | |
4525 | return 0; | |
4526 | } | |
4527 | ||
4528 | /** | |
4529 | * pmcraid_release_hcams - release HCAM buffers | |
4530 | * | |
4531 | * @pinstance: pointer to per adapter instance structure | |
4532 | * | |
4533 | * Return value | |
4534 | * none | |
4535 | */ | |
4536 | static void pmcraid_release_hcams(struct pmcraid_instance *pinstance) | |
4537 | { | |
4538 | if (pinstance->ccn.msg != NULL) { | |
4539 | pci_free_consistent(pinstance->pdev, | |
4540 | PMCRAID_AEN_HDR_SIZE + | |
4541 | sizeof(struct pmcraid_hcam_ccn), | |
4542 | pinstance->ccn.msg, | |
4543 | pinstance->ccn.baddr); | |
4544 | ||
4545 | pinstance->ccn.msg = NULL; | |
4546 | pinstance->ccn.hcam = NULL; | |
4547 | pinstance->ccn.baddr = 0; | |
4548 | } | |
4549 | ||
4550 | if (pinstance->ldn.msg != NULL) { | |
4551 | pci_free_consistent(pinstance->pdev, | |
4552 | PMCRAID_AEN_HDR_SIZE + | |
4553 | sizeof(struct pmcraid_hcam_ldn), | |
4554 | pinstance->ldn.msg, | |
4555 | pinstance->ldn.baddr); | |
4556 | ||
4557 | pinstance->ldn.msg = NULL; | |
4558 | pinstance->ldn.hcam = NULL; | |
4559 | pinstance->ldn.baddr = 0; | |
4560 | } | |
4561 | } | |
4562 | ||
4563 | /** | |
4564 | * pmcraid_allocate_hcams - allocates HCAM buffers | |
4565 | * @pinstance : pointer to per adapter instance structure | |
4566 | * | |
4567 | * Return Value: | |
4568 | * 0 in case of successful allocation, non-zero otherwise | |
4569 | */ | |
4570 | static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance) | |
4571 | { | |
4572 | pinstance->ccn.msg = pci_alloc_consistent( | |
4573 | pinstance->pdev, | |
4574 | PMCRAID_AEN_HDR_SIZE + | |
4575 | sizeof(struct pmcraid_hcam_ccn), | |
4576 | &(pinstance->ccn.baddr)); | |
4577 | ||
4578 | pinstance->ldn.msg = pci_alloc_consistent( | |
4579 | pinstance->pdev, | |
4580 | PMCRAID_AEN_HDR_SIZE + | |
4581 | sizeof(struct pmcraid_hcam_ldn), | |
4582 | &(pinstance->ldn.baddr)); | |
4583 | ||
4584 | if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) { | |
4585 | pmcraid_release_hcams(pinstance); | |
4586 | } else { | |
4587 | pinstance->ccn.hcam = | |
4588 | (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE; | |
4589 | pinstance->ldn.hcam = | |
4590 | (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE; | |
4591 | ||
4592 | atomic_set(&pinstance->ccn.ignore, 0); | |
4593 | atomic_set(&pinstance->ldn.ignore, 0); | |
4594 | } | |
4595 | ||
4596 | return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0; | |
4597 | } | |
4598 | ||
4599 | /** | |
4600 | * pmcraid_release_config_buffers - release config.table buffers | |
4601 | * @pinstance: pointer to per adapter instance structure | |
4602 | * | |
4603 | * Return Value | |
4604 | * none | |
4605 | */ | |
4606 | static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance) | |
4607 | { | |
4608 | if (pinstance->cfg_table != NULL && | |
4609 | pinstance->cfg_table_bus_addr != 0) { | |
4610 | pci_free_consistent(pinstance->pdev, | |
4611 | sizeof(struct pmcraid_config_table), | |
4612 | pinstance->cfg_table, | |
4613 | pinstance->cfg_table_bus_addr); | |
4614 | pinstance->cfg_table = NULL; | |
4615 | pinstance->cfg_table_bus_addr = 0; | |
4616 | } | |
4617 | ||
4618 | if (pinstance->res_entries != NULL) { | |
4619 | int i; | |
4620 | ||
4621 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++) | |
4622 | list_del(&pinstance->res_entries[i].queue); | |
4623 | kfree(pinstance->res_entries); | |
4624 | pinstance->res_entries = NULL; | |
4625 | } | |
4626 | ||
4627 | pmcraid_release_hcams(pinstance); | |
4628 | } | |
4629 | ||
4630 | /** | |
4631 | * pmcraid_allocate_config_buffers - allocates DMAable memory for config table | |
4632 | * @pinstance : pointer to per adapter instance structure | |
4633 | * | |
4634 | * Return Value | |
4635 | * 0 for successful allocation, -ENOMEM for any failure | |
4636 | */ | |
4637 | static int __devinit | |
4638 | pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance) | |
4639 | { | |
4640 | int i; | |
4641 | ||
4642 | pinstance->res_entries = | |
4643 | kzalloc(sizeof(struct pmcraid_resource_entry) * | |
4644 | PMCRAID_MAX_RESOURCES, GFP_KERNEL); | |
4645 | ||
4646 | if (NULL == pinstance->res_entries) { | |
4647 | pmcraid_err("failed to allocate memory for resource table\n"); | |
4648 | return -ENOMEM; | |
4649 | } | |
4650 | ||
4651 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++) | |
4652 | list_add_tail(&pinstance->res_entries[i].queue, | |
4653 | &pinstance->free_res_q); | |
4654 | ||
4655 | pinstance->cfg_table = | |
4656 | pci_alloc_consistent(pinstance->pdev, | |
4657 | sizeof(struct pmcraid_config_table), | |
4658 | &pinstance->cfg_table_bus_addr); | |
4659 | ||
4660 | if (NULL == pinstance->cfg_table) { | |
4661 | pmcraid_err("couldn't alloc DMA memory for config table\n"); | |
4662 | pmcraid_release_config_buffers(pinstance); | |
4663 | return -ENOMEM; | |
4664 | } | |
4665 | ||
4666 | if (pmcraid_allocate_hcams(pinstance)) { | |
4667 | pmcraid_err("could not alloc DMA memory for HCAMS\n"); | |
4668 | pmcraid_release_config_buffers(pinstance); | |
4669 | return -ENOMEM; | |
4670 | } | |
4671 | ||
4672 | return 0; | |
4673 | } | |
4674 | ||
4675 | /** | |
4676 | * pmcraid_init_tasklets - registers tasklets for response handling | |
4677 | * | |
4678 | * @pinstance: pointer adapter instance structure | |
4679 | * | |
4680 | * Return value | |
4681 | * none | |
4682 | */ | |
4683 | static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance) | |
4684 | { | |
4685 | int i; | |
4686 | for (i = 0; i < pinstance->num_hrrq; i++) | |
4687 | tasklet_init(&pinstance->isr_tasklet[i], | |
4688 | pmcraid_tasklet_function, | |
4689 | (unsigned long)&pinstance->hrrq_vector[i]); | |
4690 | } | |
4691 | ||
4692 | /** | |
4693 | * pmcraid_kill_tasklets - destroys tasklets registered for response handling | |
4694 | * | |
4695 | * @pinstance: pointer to adapter instance structure | |
4696 | * | |
4697 | * Return value | |
4698 | * none | |
4699 | */ | |
4700 | static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance) | |
4701 | { | |
4702 | int i; | |
4703 | for (i = 0; i < pinstance->num_hrrq; i++) | |
4704 | tasklet_kill(&pinstance->isr_tasklet[i]); | |
4705 | } | |
4706 | ||
4707 | /** | |
4708 | * pmcraid_init_buffers - allocates memory and initializes various structures | |
4709 | * @pinstance: pointer to per adapter instance structure | |
4710 | * | |
4711 | * This routine pre-allocates memory based on the type of block as below: | |
4712 | * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator, | |
4713 | * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator | |
4714 | * config-table entries : DMAable memory using pci_alloc_consistent | |
4715 | * HostRRQs : DMAable memory, using pci_alloc_consistent | |
4716 | * | |
4717 | * Return Value | |
4718 | * 0 in case all of the blocks are allocated, -ENOMEM otherwise. | |
4719 | */ | |
4720 | static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance) | |
4721 | { | |
4722 | int i; | |
4723 | ||
4724 | if (pmcraid_allocate_host_rrqs(pinstance)) { | |
4725 | pmcraid_err("couldn't allocate memory for %d host rrqs\n", | |
4726 | pinstance->num_hrrq); | |
4727 | return -ENOMEM; | |
4728 | } | |
4729 | ||
4730 | if (pmcraid_allocate_config_buffers(pinstance)) { | |
4731 | pmcraid_err("couldn't allocate memory for config buffers\n"); | |
4732 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); | |
4733 | return -ENOMEM; | |
4734 | } | |
4735 | ||
4736 | if (pmcraid_allocate_cmd_blocks(pinstance)) { | |
4737 | pmcraid_err("couldn't allocate memory for cmd blocks \n"); | |
4738 | pmcraid_release_config_buffers(pinstance); | |
4739 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); | |
4740 | return -ENOMEM; | |
4741 | } | |
4742 | ||
4743 | if (pmcraid_allocate_control_blocks(pinstance)) { | |
4744 | pmcraid_err("couldn't allocate memory control blocks \n"); | |
4745 | pmcraid_release_config_buffers(pinstance); | |
4746 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD); | |
4747 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); | |
4748 | return -ENOMEM; | |
4749 | } | |
4750 | ||
4751 | /* Initialize all the command blocks and add them to free pool. No | |
4752 | * need to lock (free_pool_lock) as this is done in initialization | |
4753 | * itself | |
4754 | */ | |
4755 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { | |
4756 | struct pmcraid_cmd *cmdp = pinstance->cmd_list[i]; | |
4757 | pmcraid_init_cmdblk(cmdp, i); | |
4758 | cmdp->drv_inst = pinstance; | |
4759 | list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool); | |
4760 | } | |
4761 | ||
4762 | return 0; | |
4763 | } | |
4764 | ||
4765 | /** | |
4766 | * pmcraid_reinit_buffers - resets various buffer pointers | |
4767 | * @pinstance: pointer to adapter instance | |
4768 | * Return value | |
4769 | * none | |
4770 | */ | |
4771 | static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance) | |
4772 | { | |
4773 | int i; | |
4774 | int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD; | |
4775 | ||
4776 | for (i = 0; i < pinstance->num_hrrq; i++) { | |
4777 | memset(pinstance->hrrq_start[i], 0, buffer_size); | |
4778 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i]; | |
4779 | pinstance->hrrq_end[i] = | |
4780 | pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1; | |
4781 | pinstance->host_toggle_bit[i] = 1; | |
4782 | } | |
4783 | } | |
4784 | ||
4785 | /** | |
4786 | * pmcraid_init_instance - initialize per instance data structure | |
4787 | * @pdev: pointer to pci device structure | |
4788 | * @host: pointer to Scsi_Host structure | |
4789 | * @mapped_pci_addr: memory mapped IOA configuration registers | |
4790 | * | |
4791 | * Return Value | |
4792 | * 0 on success, non-zero in case of any failure | |
4793 | */ | |
4794 | static int __devinit pmcraid_init_instance( | |
4795 | struct pci_dev *pdev, | |
4796 | struct Scsi_Host *host, | |
4797 | void __iomem *mapped_pci_addr | |
4798 | ) | |
4799 | { | |
4800 | struct pmcraid_instance *pinstance = | |
4801 | (struct pmcraid_instance *)host->hostdata; | |
4802 | ||
4803 | pinstance->host = host; | |
4804 | pinstance->pdev = pdev; | |
4805 | ||
4806 | /* Initialize register addresses */ | |
4807 | pinstance->mapped_dma_addr = mapped_pci_addr; | |
4808 | ||
4809 | /* Initialize chip-specific details */ | |
4810 | { | |
4811 | struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg; | |
4812 | struct pmcraid_interrupts *pint_regs = &pinstance->int_regs; | |
4813 | ||
4814 | pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin; | |
4815 | ||
4816 | pint_regs->ioa_host_interrupt_reg = | |
4817 | mapped_pci_addr + chip_cfg->ioa_host_intr; | |
4818 | pint_regs->ioa_host_interrupt_clr_reg = | |
4819 | mapped_pci_addr + chip_cfg->ioa_host_intr_clr; | |
4820 | pint_regs->host_ioa_interrupt_reg = | |
4821 | mapped_pci_addr + chip_cfg->host_ioa_intr; | |
4822 | pint_regs->host_ioa_interrupt_clr_reg = | |
4823 | mapped_pci_addr + chip_cfg->host_ioa_intr_clr; | |
4824 | ||
4825 | /* Current version of firmware exposes interrupt mask set | |
4826 | * and mask clr registers through memory mapped bar0. | |
4827 | */ | |
4828 | pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox; | |
4829 | pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus; | |
4830 | pint_regs->ioa_host_interrupt_mask_reg = | |
4831 | mapped_pci_addr + chip_cfg->ioa_host_mask; | |
4832 | pint_regs->ioa_host_interrupt_mask_clr_reg = | |
4833 | mapped_pci_addr + chip_cfg->ioa_host_mask_clr; | |
4834 | pint_regs->global_interrupt_mask_reg = | |
4835 | mapped_pci_addr + chip_cfg->global_intr_mask; | |
4836 | }; | |
4837 | ||
4838 | pinstance->ioa_reset_attempts = 0; | |
4839 | init_waitqueue_head(&pinstance->reset_wait_q); | |
4840 | ||
4841 | atomic_set(&pinstance->outstanding_cmds, 0); | |
4842 | atomic_set(&pinstance->expose_resources, 0); | |
4843 | ||
4844 | INIT_LIST_HEAD(&pinstance->free_res_q); | |
4845 | INIT_LIST_HEAD(&pinstance->used_res_q); | |
4846 | INIT_LIST_HEAD(&pinstance->free_cmd_pool); | |
4847 | INIT_LIST_HEAD(&pinstance->pending_cmd_pool); | |
4848 | ||
4849 | spin_lock_init(&pinstance->free_pool_lock); | |
4850 | spin_lock_init(&pinstance->pending_pool_lock); | |
4851 | spin_lock_init(&pinstance->resource_lock); | |
4852 | mutex_init(&pinstance->aen_queue_lock); | |
4853 | ||
4854 | /* Work-queue (Shared) for deferred processing error handling */ | |
4855 | INIT_WORK(&pinstance->worker_q, pmcraid_worker_function); | |
4856 | ||
4857 | /* Initialize the default log_level */ | |
4858 | pinstance->current_log_level = pmcraid_log_level; | |
4859 | ||
4860 | /* Setup variables required for reset engine */ | |
4861 | pinstance->ioa_state = IOA_STATE_UNKNOWN; | |
4862 | pinstance->reset_cmd = NULL; | |
4863 | return 0; | |
4864 | } | |
4865 | ||
4866 | /** | |
4867 | * pmcraid_release_buffers - release per-adapter buffers allocated | |
4868 | * | |
4869 | * @pinstance: pointer to adapter soft state | |
4870 | * | |
4871 | * Return Value | |
4872 | * none | |
4873 | */ | |
4874 | static void pmcraid_release_buffers(struct pmcraid_instance *pinstance) | |
4875 | { | |
4876 | pmcraid_release_config_buffers(pinstance); | |
4877 | pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD); | |
4878 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD); | |
4879 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); | |
4880 | ||
4881 | } | |
4882 | ||
4883 | /** | |
4884 | * pmcraid_shutdown - shutdown adapter controller. | |
4885 | * @pdev: pci device struct | |
4886 | * | |
4887 | * Issues an adapter shutdown to the card waits for its completion | |
4888 | * | |
4889 | * Return value | |
4890 | * none | |
4891 | */ | |
4892 | static void pmcraid_shutdown(struct pci_dev *pdev) | |
4893 | { | |
4894 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); | |
4895 | pmcraid_reset_bringdown(pinstance); | |
4896 | } | |
4897 | ||
4898 | ||
4899 | /** | |
4900 | * pmcraid_get_minor - returns unused minor number from minor number bitmap | |
4901 | */ | |
4902 | static unsigned short pmcraid_get_minor(void) | |
4903 | { | |
4904 | int minor; | |
4905 | ||
4906 | minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor)); | |
4907 | __set_bit(minor, pmcraid_minor); | |
4908 | return minor; | |
4909 | } | |
4910 | ||
4911 | /** | |
4912 | * pmcraid_release_minor - releases given minor back to minor number bitmap | |
4913 | */ | |
4914 | static void pmcraid_release_minor(unsigned short minor) | |
4915 | { | |
4916 | __clear_bit(minor, pmcraid_minor); | |
4917 | } | |
4918 | ||
4919 | /** | |
4920 | * pmcraid_setup_chrdev - allocates a minor number and registers a char device | |
4921 | * | |
4922 | * @pinstance: pointer to adapter instance for which to register device | |
4923 | * | |
4924 | * Return value | |
4925 | * 0 in case of success, otherwise non-zero | |
4926 | */ | |
4927 | static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance) | |
4928 | { | |
4929 | int minor; | |
4930 | int error; | |
4931 | ||
4932 | minor = pmcraid_get_minor(); | |
4933 | cdev_init(&pinstance->cdev, &pmcraid_fops); | |
4934 | pinstance->cdev.owner = THIS_MODULE; | |
4935 | ||
4936 | error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1); | |
4937 | ||
4938 | if (error) | |
4939 | pmcraid_release_minor(minor); | |
4940 | else | |
4941 | device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor), | |
4942 | NULL, "pmcsas%u", minor); | |
4943 | return error; | |
4944 | } | |
4945 | ||
4946 | /** | |
4947 | * pmcraid_release_chrdev - unregisters per-adapter management interface | |
4948 | * | |
4949 | * @pinstance: pointer to adapter instance structure | |
4950 | * | |
4951 | * Return value | |
4952 | * none | |
4953 | */ | |
4954 | static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance) | |
4955 | { | |
4956 | pmcraid_release_minor(MINOR(pinstance->cdev.dev)); | |
4957 | device_destroy(pmcraid_class, | |
4958 | MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev))); | |
4959 | cdev_del(&pinstance->cdev); | |
4960 | } | |
4961 | ||
4962 | /** | |
4963 | * pmcraid_remove - IOA hot plug remove entry point | |
4964 | * @pdev: pci device struct | |
4965 | * | |
4966 | * Return value | |
4967 | * none | |
4968 | */ | |
4969 | static void __devexit pmcraid_remove(struct pci_dev *pdev) | |
4970 | { | |
4971 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); | |
4972 | ||
4973 | /* remove the management interface (/dev file) for this device */ | |
4974 | pmcraid_release_chrdev(pinstance); | |
4975 | ||
4976 | /* remove host template from scsi midlayer */ | |
4977 | scsi_remove_host(pinstance->host); | |
4978 | ||
4979 | /* block requests from mid-layer */ | |
4980 | scsi_block_requests(pinstance->host); | |
4981 | ||
4982 | /* initiate shutdown adapter */ | |
4983 | pmcraid_shutdown(pdev); | |
4984 | ||
4985 | pmcraid_disable_interrupts(pinstance, ~0); | |
4986 | flush_scheduled_work(); | |
4987 | ||
4988 | pmcraid_kill_tasklets(pinstance); | |
4989 | pmcraid_unregister_interrupt_handler(pinstance); | |
4990 | pmcraid_release_buffers(pinstance); | |
4991 | iounmap(pinstance->mapped_dma_addr); | |
4992 | pci_release_regions(pdev); | |
4993 | scsi_host_put(pinstance->host); | |
4994 | pci_disable_device(pdev); | |
4995 | ||
4996 | return; | |
4997 | } | |
4998 | ||
4999 | #ifdef CONFIG_PM | |
5000 | /** | |
5001 | * pmcraid_suspend - driver suspend entry point for power management | |
5002 | * @pdev: PCI device structure | |
5003 | * @state: PCI power state to suspend routine | |
5004 | * | |
5005 | * Return Value - 0 always | |
5006 | */ | |
5007 | static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state) | |
5008 | { | |
5009 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); | |
5010 | ||
5011 | pmcraid_shutdown(pdev); | |
5012 | pmcraid_disable_interrupts(pinstance, ~0); | |
5013 | pmcraid_kill_tasklets(pinstance); | |
5014 | pci_set_drvdata(pinstance->pdev, pinstance); | |
5015 | pmcraid_unregister_interrupt_handler(pinstance); | |
5016 | pci_save_state(pdev); | |
5017 | pci_disable_device(pdev); | |
5018 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
5019 | ||
5020 | return 0; | |
5021 | } | |
5022 | ||
5023 | /** | |
5024 | * pmcraid_resume - driver resume entry point PCI power management | |
5025 | * @pdev: PCI device structure | |
5026 | * | |
5027 | * Return Value - 0 in case of success. Error code in case of any failure | |
5028 | */ | |
5029 | static int pmcraid_resume(struct pci_dev *pdev) | |
5030 | { | |
5031 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); | |
5032 | struct Scsi_Host *host = pinstance->host; | |
5033 | int rc; | |
5034 | int hrrqs; | |
5035 | ||
5036 | pci_set_power_state(pdev, PCI_D0); | |
5037 | pci_enable_wake(pdev, PCI_D0, 0); | |
5038 | pci_restore_state(pdev); | |
5039 | ||
5040 | rc = pci_enable_device(pdev); | |
5041 | ||
5042 | if (rc) { | |
5043 | pmcraid_err("pmcraid: Enable device failed\n"); | |
5044 | return rc; | |
5045 | } | |
5046 | ||
5047 | pci_set_master(pdev); | |
5048 | ||
5049 | if ((sizeof(dma_addr_t) == 4) || | |
5050 | pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) | |
5051 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); | |
5052 | ||
5053 | if (rc == 0) | |
5054 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); | |
5055 | ||
5056 | if (rc != 0) { | |
5057 | dev_err(&pdev->dev, "Failed to set PCI DMA mask\n"); | |
5058 | goto disable_device; | |
5059 | } | |
5060 | ||
5061 | atomic_set(&pinstance->outstanding_cmds, 0); | |
5062 | hrrqs = pinstance->num_hrrq; | |
5063 | rc = pmcraid_register_interrupt_handler(pinstance); | |
5064 | ||
5065 | if (rc) { | |
5066 | pmcraid_err("resume: couldn't register interrupt handlers\n"); | |
5067 | rc = -ENODEV; | |
5068 | goto release_host; | |
5069 | } | |
5070 | ||
5071 | pmcraid_init_tasklets(pinstance); | |
5072 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); | |
5073 | ||
5074 | /* Start with hard reset sequence which brings up IOA to operational | |
5075 | * state as well as completes the reset sequence. | |
5076 | */ | |
5077 | pinstance->ioa_hard_reset = 1; | |
5078 | ||
5079 | /* Start IOA firmware initialization and bring card to Operational | |
5080 | * state. | |
5081 | */ | |
5082 | if (pmcraid_reset_bringup(pinstance)) { | |
5083 | pmcraid_err("couldn't initialize IOA \n"); | |
5084 | rc = -ENODEV; | |
5085 | goto release_tasklets; | |
5086 | } | |
5087 | ||
5088 | return 0; | |
5089 | ||
5090 | release_tasklets: | |
5091 | pmcraid_kill_tasklets(pinstance); | |
5092 | pmcraid_unregister_interrupt_handler(pinstance); | |
5093 | ||
5094 | release_host: | |
5095 | scsi_host_put(host); | |
5096 | ||
5097 | disable_device: | |
5098 | pci_disable_device(pdev); | |
5099 | ||
5100 | return rc; | |
5101 | } | |
5102 | ||
5103 | #else | |
5104 | ||
5105 | #define pmcraid_suspend NULL | |
5106 | #define pmcraid_resume NULL | |
5107 | ||
5108 | #endif /* CONFIG_PM */ | |
5109 | ||
5110 | /** | |
5111 | * pmcraid_complete_ioa_reset - Called by either timer or tasklet during | |
5112 | * completion of the ioa reset | |
5113 | * @cmd: pointer to reset command block | |
5114 | */ | |
5115 | static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd) | |
5116 | { | |
5117 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
5118 | unsigned long flags; | |
5119 | ||
5120 | spin_lock_irqsave(pinstance->host->host_lock, flags); | |
5121 | pmcraid_ioa_reset(cmd); | |
5122 | spin_unlock_irqrestore(pinstance->host->host_lock, flags); | |
5123 | scsi_unblock_requests(pinstance->host); | |
5124 | schedule_work(&pinstance->worker_q); | |
5125 | } | |
5126 | ||
5127 | /** | |
5128 | * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP | |
5129 | * | |
5130 | * @cmd: pointer to pmcraid_cmd structure | |
5131 | * | |
5132 | * Return Value | |
5133 | * 0 for success or non-zero for failure cases | |
5134 | */ | |
5135 | static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd) | |
5136 | { | |
5137 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; | |
5138 | void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset; | |
5139 | ||
5140 | pmcraid_reinit_cmdblk(cmd); | |
5141 | ||
5142 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); | |
5143 | ioarcb->request_type = REQ_TYPE_IOACMD; | |
5144 | ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES; | |
5145 | ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED; | |
5146 | ||
5147 | /* If this was called as part of resource table reinitialization due to | |
5148 | * lost CCN, it is enough to return the command block back to free pool | |
5149 | * as part of set_supported_devs completion function. | |
5150 | */ | |
5151 | if (cmd->drv_inst->reinit_cfg_table) { | |
5152 | cmd->drv_inst->reinit_cfg_table = 0; | |
5153 | cmd->release = 1; | |
5154 | cmd_done = pmcraid_reinit_cfgtable_done; | |
5155 | } | |
5156 | ||
5157 | /* we will be done with the reset sequence after set supported devices, | |
5158 | * setup the done function to return the command block back to free | |
5159 | * pool | |
5160 | */ | |
5161 | pmcraid_send_cmd(cmd, | |
5162 | cmd_done, | |
5163 | PMCRAID_SET_SUP_DEV_TIMEOUT, | |
5164 | pmcraid_timeout_handler); | |
5165 | return; | |
5166 | } | |
5167 | ||
5168 | /** | |
5169 | * pmcraid_init_res_table - Initialize the resource table | |
5170 | * @cmd: pointer to pmcraid command struct | |
5171 | * | |
5172 | * This function looks through the existing resource table, comparing | |
5173 | * it with the config table. This function will take care of old/new | |
5174 | * devices and schedule adding/removing them from the mid-layer | |
5175 | * as appropriate. | |
5176 | * | |
5177 | * Return value | |
5178 | * None | |
5179 | */ | |
5180 | static void pmcraid_init_res_table(struct pmcraid_cmd *cmd) | |
5181 | { | |
5182 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
5183 | struct pmcraid_resource_entry *res, *temp; | |
5184 | struct pmcraid_config_table_entry *cfgte; | |
5185 | unsigned long lock_flags; | |
5186 | int found, rc, i; | |
5187 | LIST_HEAD(old_res); | |
5188 | ||
5189 | if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED) | |
5190 | dev_err(&pinstance->pdev->dev, "Require microcode download\n"); | |
5191 | ||
5192 | /* resource list is protected by pinstance->resource_lock. | |
5193 | * init_res_table can be called from probe (user-thread) or runtime | |
5194 | * reset (timer/tasklet) | |
5195 | */ | |
5196 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); | |
5197 | ||
5198 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) | |
5199 | list_move_tail(&res->queue, &old_res); | |
5200 | ||
5201 | for (i = 0; i < pinstance->cfg_table->num_entries; i++) { | |
5202 | cfgte = &pinstance->cfg_table->entries[i]; | |
5203 | ||
5204 | if (!pmcraid_expose_resource(cfgte)) | |
5205 | continue; | |
5206 | ||
5207 | found = 0; | |
5208 | ||
5209 | /* If this entry was already detected and initialized */ | |
5210 | list_for_each_entry_safe(res, temp, &old_res, queue) { | |
5211 | ||
5212 | rc = memcmp(&res->cfg_entry.resource_address, | |
5213 | &cfgte->resource_address, | |
5214 | sizeof(cfgte->resource_address)); | |
5215 | if (!rc) { | |
5216 | list_move_tail(&res->queue, | |
5217 | &pinstance->used_res_q); | |
5218 | found = 1; | |
5219 | break; | |
5220 | } | |
5221 | } | |
5222 | ||
5223 | /* If this is new entry, initialize it and add it the queue */ | |
5224 | if (!found) { | |
5225 | ||
5226 | if (list_empty(&pinstance->free_res_q)) { | |
5227 | dev_err(&pinstance->pdev->dev, | |
5228 | "Too many devices attached\n"); | |
5229 | break; | |
5230 | } | |
5231 | ||
5232 | found = 1; | |
5233 | res = list_entry(pinstance->free_res_q.next, | |
5234 | struct pmcraid_resource_entry, queue); | |
5235 | ||
5236 | res->scsi_dev = NULL; | |
5237 | res->change_detected = RES_CHANGE_ADD; | |
5238 | res->reset_progress = 0; | |
5239 | list_move_tail(&res->queue, &pinstance->used_res_q); | |
5240 | } | |
5241 | ||
5242 | /* copy new configuration table entry details into driver | |
5243 | * maintained resource entry | |
5244 | */ | |
5245 | if (found) { | |
5246 | memcpy(&res->cfg_entry, cfgte, | |
5247 | sizeof(struct pmcraid_config_table_entry)); | |
5248 | pmcraid_info("New res type:%x, vset:%x, addr:%x:\n", | |
5249 | res->cfg_entry.resource_type, | |
5250 | res->cfg_entry.unique_flags1, | |
5251 | le32_to_cpu(res->cfg_entry.resource_address)); | |
5252 | } | |
5253 | } | |
5254 | ||
5255 | /* Detect any deleted entries, mark them for deletion from mid-layer */ | |
5256 | list_for_each_entry_safe(res, temp, &old_res, queue) { | |
5257 | ||
5258 | if (res->scsi_dev) { | |
5259 | res->change_detected = RES_CHANGE_DEL; | |
5260 | res->cfg_entry.resource_handle = | |
5261 | PMCRAID_INVALID_RES_HANDLE; | |
5262 | list_move_tail(&res->queue, &pinstance->used_res_q); | |
5263 | } else { | |
5264 | list_move_tail(&res->queue, &pinstance->free_res_q); | |
5265 | } | |
5266 | } | |
5267 | ||
5268 | /* release the resource list lock */ | |
5269 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); | |
5270 | pmcraid_set_supported_devs(cmd); | |
5271 | } | |
5272 | ||
5273 | /** | |
5274 | * pmcraid_querycfg - Send a Query IOA Config to the adapter. | |
5275 | * @cmd: pointer pmcraid_cmd struct | |
5276 | * | |
5277 | * This function sends a Query IOA Configuration command to the adapter to | |
5278 | * retrieve the IOA configuration table. | |
5279 | * | |
5280 | * Return value: | |
5281 | * none | |
5282 | */ | |
5283 | static void pmcraid_querycfg(struct pmcraid_cmd *cmd) | |
5284 | { | |
5285 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; | |
5286 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; | |
5287 | struct pmcraid_instance *pinstance = cmd->drv_inst; | |
5288 | int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table)); | |
5289 | ||
5290 | ioarcb->request_type = REQ_TYPE_IOACMD; | |
5291 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); | |
5292 | ||
5293 | ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG; | |
5294 | ||
5295 | /* firmware requires 4-byte length field, specified in B.E format */ | |
5296 | memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size)); | |
5297 | ||
5298 | /* Since entire config table can be described by single IOADL, it can | |
5299 | * be part of IOARCB itself | |
5300 | */ | |
5301 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + | |
5302 | offsetof(struct pmcraid_ioarcb, | |
5303 | add_data.u.ioadl[0])); | |
5304 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); | |
5305 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); | |
5306 | ||
5307 | ioarcb->request_flags0 |= NO_LINK_DESCS; | |
5308 | ioarcb->data_transfer_length = | |
5309 | cpu_to_le32(sizeof(struct pmcraid_config_table)); | |
5310 | ||
5311 | ioadl = &(ioarcb->add_data.u.ioadl[0]); | |
5312 | ioadl->flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC); | |
5313 | ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr); | |
5314 | ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table)); | |
5315 | ||
5316 | pmcraid_send_cmd(cmd, pmcraid_init_res_table, | |
5317 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler); | |
5318 | } | |
5319 | ||
5320 | ||
5321 | /** | |
5322 | * pmcraid_probe - PCI probe entry pointer for PMC MaxRaid controller driver | |
5323 | * @pdev: pointer to pci device structure | |
5324 | * @dev_id: pointer to device ids structure | |
5325 | * | |
5326 | * Return Value | |
5327 | * returns 0 if the device is claimed and successfully configured. | |
5328 | * returns non-zero error code in case of any failure | |
5329 | */ | |
5330 | static int __devinit pmcraid_probe( | |
5331 | struct pci_dev *pdev, | |
5332 | const struct pci_device_id *dev_id | |
5333 | ) | |
5334 | { | |
5335 | struct pmcraid_instance *pinstance; | |
5336 | struct Scsi_Host *host; | |
5337 | void __iomem *mapped_pci_addr; | |
5338 | int rc = PCIBIOS_SUCCESSFUL; | |
5339 | ||
5340 | if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) { | |
5341 | pmcraid_err | |
5342 | ("maximum number(%d) of supported adapters reached\n", | |
5343 | atomic_read(&pmcraid_adapter_count)); | |
5344 | return -ENOMEM; | |
5345 | } | |
5346 | ||
5347 | atomic_inc(&pmcraid_adapter_count); | |
5348 | rc = pci_enable_device(pdev); | |
5349 | ||
5350 | if (rc) { | |
5351 | dev_err(&pdev->dev, "Cannot enable adapter\n"); | |
5352 | atomic_dec(&pmcraid_adapter_count); | |
5353 | return rc; | |
5354 | } | |
5355 | ||
5356 | dev_info(&pdev->dev, | |
5357 | "Found new IOA(%x:%x), Total IOA count: %d\n", | |
5358 | pdev->vendor, pdev->device, | |
5359 | atomic_read(&pmcraid_adapter_count)); | |
5360 | ||
5361 | rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME); | |
5362 | ||
5363 | if (rc < 0) { | |
5364 | dev_err(&pdev->dev, | |
5365 | "Couldn't register memory range of registers\n"); | |
5366 | goto out_disable_device; | |
5367 | } | |
5368 | ||
5369 | mapped_pci_addr = pci_iomap(pdev, 0, 0); | |
5370 | ||
5371 | if (!mapped_pci_addr) { | |
5372 | dev_err(&pdev->dev, "Couldn't map PCI registers memory\n"); | |
5373 | rc = -ENOMEM; | |
5374 | goto out_release_regions; | |
5375 | } | |
5376 | ||
5377 | pci_set_master(pdev); | |
5378 | ||
5379 | /* Firmware requires the system bus address of IOARCB to be within | |
5380 | * 32-bit addressable range though it has 64-bit IOARRIN register. | |
5381 | * However, firmware supports 64-bit streaming DMA buffers, whereas | |
5382 | * coherent buffers are to be 32-bit. Since pci_alloc_consistent always | |
5383 | * returns memory within 4GB (if not, change this logic), coherent | |
5384 | * buffers are within firmware acceptible address ranges. | |
5385 | */ | |
5386 | if ((sizeof(dma_addr_t) == 4) || | |
5387 | pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) | |
5388 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); | |
5389 | ||
5390 | /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32 | |
5391 | * bit mask for pci_alloc_consistent to return addresses within 4GB | |
5392 | */ | |
5393 | if (rc == 0) | |
5394 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); | |
5395 | ||
5396 | if (rc != 0) { | |
5397 | dev_err(&pdev->dev, "Failed to set PCI DMA mask\n"); | |
5398 | goto cleanup_nomem; | |
5399 | } | |
5400 | ||
5401 | host = scsi_host_alloc(&pmcraid_host_template, | |
5402 | sizeof(struct pmcraid_instance)); | |
5403 | ||
5404 | if (!host) { | |
5405 | dev_err(&pdev->dev, "scsi_host_alloc failed!\n"); | |
5406 | rc = -ENOMEM; | |
5407 | goto cleanup_nomem; | |
5408 | } | |
5409 | ||
5410 | host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS; | |
5411 | host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET; | |
5412 | host->unique_id = host->host_no; | |
5413 | host->max_channel = PMCRAID_MAX_BUS_TO_SCAN; | |
5414 | host->max_cmd_len = PMCRAID_MAX_CDB_LEN; | |
5415 | ||
5416 | /* zero out entire instance structure */ | |
5417 | pinstance = (struct pmcraid_instance *)host->hostdata; | |
5418 | memset(pinstance, 0, sizeof(*pinstance)); | |
5419 | ||
5420 | pinstance->chip_cfg = | |
5421 | (struct pmcraid_chip_details *)(dev_id->driver_data); | |
5422 | ||
5423 | rc = pmcraid_init_instance(pdev, host, mapped_pci_addr); | |
5424 | ||
5425 | if (rc < 0) { | |
5426 | dev_err(&pdev->dev, "failed to initialize adapter instance\n"); | |
5427 | goto out_scsi_host_put; | |
5428 | } | |
5429 | ||
5430 | pci_set_drvdata(pdev, pinstance); | |
5431 | ||
5432 | /* Save PCI config-space for use following the reset */ | |
5433 | rc = pci_save_state(pinstance->pdev); | |
5434 | ||
5435 | if (rc != 0) { | |
5436 | dev_err(&pdev->dev, "Failed to save PCI config space\n"); | |
5437 | goto out_scsi_host_put; | |
5438 | } | |
5439 | ||
5440 | pmcraid_disable_interrupts(pinstance, ~0); | |
5441 | ||
5442 | rc = pmcraid_register_interrupt_handler(pinstance); | |
5443 | ||
5444 | if (rc) { | |
5445 | pmcraid_err("couldn't register interrupt handler\n"); | |
5446 | goto out_scsi_host_put; | |
5447 | } | |
5448 | ||
5449 | pmcraid_init_tasklets(pinstance); | |
5450 | ||
5451 | /* allocate verious buffers used by LLD.*/ | |
5452 | rc = pmcraid_init_buffers(pinstance); | |
5453 | ||
5454 | if (rc) { | |
5455 | pmcraid_err("couldn't allocate memory blocks\n"); | |
5456 | goto out_unregister_isr; | |
5457 | } | |
5458 | ||
5459 | /* check the reset type required */ | |
5460 | pmcraid_reset_type(pinstance); | |
5461 | ||
5462 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); | |
5463 | ||
5464 | /* Start IOA firmware initialization and bring card to Operational | |
5465 | * state. | |
5466 | */ | |
5467 | pmcraid_info("starting IOA initialization sequence\n"); | |
5468 | if (pmcraid_reset_bringup(pinstance)) { | |
5469 | pmcraid_err("couldn't initialize IOA \n"); | |
5470 | rc = 1; | |
5471 | goto out_release_bufs; | |
5472 | } | |
5473 | ||
5474 | /* Add adapter instance into mid-layer list */ | |
5475 | rc = scsi_add_host(pinstance->host, &pdev->dev); | |
5476 | if (rc != 0) { | |
5477 | pmcraid_err("couldn't add host into mid-layer: %d\n", rc); | |
5478 | goto out_release_bufs; | |
5479 | } | |
5480 | ||
5481 | scsi_scan_host(pinstance->host); | |
5482 | ||
5483 | rc = pmcraid_setup_chrdev(pinstance); | |
5484 | ||
5485 | if (rc != 0) { | |
5486 | pmcraid_err("couldn't create mgmt interface, error: %x\n", | |
5487 | rc); | |
5488 | goto out_remove_host; | |
5489 | } | |
5490 | ||
5491 | /* Schedule worker thread to handle CCN and take care of adding and | |
5492 | * removing devices to OS | |
5493 | */ | |
5494 | atomic_set(&pinstance->expose_resources, 1); | |
5495 | schedule_work(&pinstance->worker_q); | |
5496 | return rc; | |
5497 | ||
5498 | out_remove_host: | |
5499 | scsi_remove_host(host); | |
5500 | ||
5501 | out_release_bufs: | |
5502 | pmcraid_release_buffers(pinstance); | |
5503 | ||
5504 | out_unregister_isr: | |
5505 | pmcraid_kill_tasklets(pinstance); | |
5506 | pmcraid_unregister_interrupt_handler(pinstance); | |
5507 | ||
5508 | out_scsi_host_put: | |
5509 | scsi_host_put(host); | |
5510 | ||
5511 | cleanup_nomem: | |
5512 | iounmap(mapped_pci_addr); | |
5513 | ||
5514 | out_release_regions: | |
5515 | pci_release_regions(pdev); | |
5516 | ||
5517 | out_disable_device: | |
5518 | atomic_dec(&pmcraid_adapter_count); | |
5519 | pci_set_drvdata(pdev, NULL); | |
5520 | pci_disable_device(pdev); | |
5521 | return -ENODEV; | |
5522 | } | |
5523 | ||
5524 | /* | |
5525 | * PCI driver structure of pcmraid driver | |
5526 | */ | |
5527 | static struct pci_driver pmcraid_driver = { | |
5528 | .name = PMCRAID_DRIVER_NAME, | |
5529 | .id_table = pmcraid_pci_table, | |
5530 | .probe = pmcraid_probe, | |
5531 | .remove = pmcraid_remove, | |
5532 | .suspend = pmcraid_suspend, | |
5533 | .resume = pmcraid_resume, | |
5534 | .shutdown = pmcraid_shutdown | |
5535 | }; | |
5536 | ||
5537 | ||
5538 | /** | |
5539 | * pmcraid_init - module load entry point | |
5540 | */ | |
5541 | static int __init pmcraid_init(void) | |
5542 | { | |
5543 | dev_t dev; | |
5544 | int error; | |
5545 | ||
5546 | pmcraid_info("%s Device Driver version: %s %s\n", | |
5547 | PMCRAID_DRIVER_NAME, | |
5548 | PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE); | |
5549 | ||
5550 | error = alloc_chrdev_region(&dev, 0, | |
5551 | PMCRAID_MAX_ADAPTERS, | |
5552 | PMCRAID_DEVFILE); | |
5553 | ||
5554 | if (error) { | |
5555 | pmcraid_err("failed to get a major number for adapters\n"); | |
5556 | goto out_init; | |
5557 | } | |
5558 | ||
5559 | pmcraid_major = MAJOR(dev); | |
5560 | pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE); | |
5561 | ||
5562 | if (IS_ERR(pmcraid_class)) { | |
5563 | error = PTR_ERR(pmcraid_class); | |
5564 | pmcraid_err("failed to register with with sysfs, error = %x\n", | |
5565 | error); | |
5566 | goto out_unreg_chrdev; | |
5567 | } | |
5568 | ||
5569 | ||
5570 | error = pmcraid_netlink_init(); | |
5571 | ||
5572 | if (error) | |
5573 | goto out_unreg_chrdev; | |
5574 | ||
5575 | error = pci_register_driver(&pmcraid_driver); | |
5576 | ||
5577 | if (error == 0) | |
5578 | goto out_init; | |
5579 | ||
5580 | pmcraid_err("failed to register pmcraid driver, error = %x\n", | |
5581 | error); | |
5582 | class_destroy(pmcraid_class); | |
5583 | pmcraid_netlink_release(); | |
5584 | ||
5585 | out_unreg_chrdev: | |
5586 | unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS); | |
5587 | out_init: | |
5588 | return error; | |
5589 | } | |
5590 | ||
5591 | /** | |
5592 | * pmcraid_exit - module unload entry point | |
5593 | */ | |
5594 | static void __exit pmcraid_exit(void) | |
5595 | { | |
5596 | pmcraid_netlink_release(); | |
5597 | class_destroy(pmcraid_class); | |
5598 | unregister_chrdev_region(MKDEV(pmcraid_major, 0), | |
5599 | PMCRAID_MAX_ADAPTERS); | |
5600 | pci_unregister_driver(&pmcraid_driver); | |
5601 | } | |
5602 | ||
5603 | module_init(pmcraid_init); | |
5604 | module_exit(pmcraid_exit); |