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c4a3e0a5 BS |
1 | /* |
2 | * | |
3 | * Linux MegaRAID driver for SAS based RAID controllers | |
4 | * | |
5 | * Copyright (c) 2003-2005 LSI Logic Corporation. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FILE : megaraid_sas.c | |
13 | * Version : v00.00.02.00-rc4 | |
14 | * | |
15 | * Authors: | |
16 | * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com> | |
17 | * Sumant Patro <Sumant.Patro@lsil.com> | |
18 | * | |
19 | * List of supported controllers | |
20 | * | |
21 | * OEM Product Name VID DID SSVID SSID | |
22 | * --- ------------ --- --- ---- ---- | |
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/list.h> | |
c4a3e0a5 BS |
29 | #include <linux/moduleparam.h> |
30 | #include <linux/module.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/uio.h> | |
35 | #include <asm/uaccess.h> | |
43399236 | 36 | #include <linux/fs.h> |
c4a3e0a5 | 37 | #include <linux/compat.h> |
0b950672 | 38 | #include <linux/mutex.h> |
c4a3e0a5 BS |
39 | |
40 | #include <scsi/scsi.h> | |
41 | #include <scsi/scsi_cmnd.h> | |
42 | #include <scsi/scsi_device.h> | |
43 | #include <scsi/scsi_host.h> | |
44 | #include "megaraid_sas.h" | |
45 | ||
46 | MODULE_LICENSE("GPL"); | |
47 | MODULE_VERSION(MEGASAS_VERSION); | |
48 | MODULE_AUTHOR("sreenivas.bagalkote@lsil.com"); | |
49 | MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver"); | |
50 | ||
51 | /* | |
52 | * PCI ID table for all supported controllers | |
53 | */ | |
54 | static struct pci_device_id megasas_pci_table[] = { | |
55 | ||
56 | { | |
57 | PCI_VENDOR_ID_LSI_LOGIC, | |
58 | PCI_DEVICE_ID_LSI_SAS1064R, | |
59 | PCI_ANY_ID, | |
60 | PCI_ANY_ID, | |
61 | }, | |
62 | { | |
63 | PCI_VENDOR_ID_DELL, | |
64 | PCI_DEVICE_ID_DELL_PERC5, | |
65 | PCI_ANY_ID, | |
66 | PCI_ANY_ID, | |
67 | }, | |
68 | {0} /* Terminating entry */ | |
69 | }; | |
70 | ||
71 | MODULE_DEVICE_TABLE(pci, megasas_pci_table); | |
72 | ||
73 | static int megasas_mgmt_majorno; | |
74 | static struct megasas_mgmt_info megasas_mgmt_info; | |
75 | static struct fasync_struct *megasas_async_queue; | |
0b950672 | 76 | static DEFINE_MUTEX(megasas_async_queue_mutex); |
c4a3e0a5 BS |
77 | |
78 | /** | |
79 | * megasas_get_cmd - Get a command from the free pool | |
80 | * @instance: Adapter soft state | |
81 | * | |
82 | * Returns a free command from the pool | |
83 | */ | |
84 | static inline struct megasas_cmd *megasas_get_cmd(struct megasas_instance | |
85 | *instance) | |
86 | { | |
87 | unsigned long flags; | |
88 | struct megasas_cmd *cmd = NULL; | |
89 | ||
90 | spin_lock_irqsave(&instance->cmd_pool_lock, flags); | |
91 | ||
92 | if (!list_empty(&instance->cmd_pool)) { | |
93 | cmd = list_entry((&instance->cmd_pool)->next, | |
94 | struct megasas_cmd, list); | |
95 | list_del_init(&cmd->list); | |
96 | } else { | |
97 | printk(KERN_ERR "megasas: Command pool empty!\n"); | |
98 | } | |
99 | ||
100 | spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); | |
101 | return cmd; | |
102 | } | |
103 | ||
104 | /** | |
105 | * megasas_return_cmd - Return a cmd to free command pool | |
106 | * @instance: Adapter soft state | |
107 | * @cmd: Command packet to be returned to free command pool | |
108 | */ | |
109 | static inline void | |
110 | megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
111 | { | |
112 | unsigned long flags; | |
113 | ||
114 | spin_lock_irqsave(&instance->cmd_pool_lock, flags); | |
115 | ||
116 | cmd->scmd = NULL; | |
117 | list_add_tail(&cmd->list, &instance->cmd_pool); | |
118 | ||
119 | spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); | |
120 | } | |
121 | ||
122 | /** | |
123 | * megasas_enable_intr - Enables interrupts | |
124 | * @regs: MFI register set | |
125 | */ | |
126 | static inline void | |
127 | megasas_enable_intr(struct megasas_register_set __iomem * regs) | |
128 | { | |
129 | writel(1, &(regs)->outbound_intr_mask); | |
130 | ||
131 | /* Dummy readl to force pci flush */ | |
132 | readl(®s->outbound_intr_mask); | |
133 | } | |
134 | ||
135 | /** | |
136 | * megasas_disable_intr - Disables interrupts | |
137 | * @regs: MFI register set | |
138 | */ | |
139 | static inline void | |
140 | megasas_disable_intr(struct megasas_register_set __iomem * regs) | |
141 | { | |
142 | u32 mask = readl(®s->outbound_intr_mask) & (~0x00000001); | |
143 | writel(mask, ®s->outbound_intr_mask); | |
144 | ||
145 | /* Dummy readl to force pci flush */ | |
146 | readl(®s->outbound_intr_mask); | |
147 | } | |
148 | ||
149 | /** | |
150 | * megasas_issue_polled - Issues a polling command | |
151 | * @instance: Adapter soft state | |
152 | * @cmd: Command packet to be issued | |
153 | * | |
154 | * For polling, MFI requires the cmd_status to be set to 0xFF before posting. | |
155 | */ | |
156 | static int | |
157 | megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
158 | { | |
159 | int i; | |
160 | u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000; | |
161 | ||
162 | struct megasas_header *frame_hdr = &cmd->frame->hdr; | |
163 | ||
164 | frame_hdr->cmd_status = 0xFF; | |
165 | frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE; | |
166 | ||
167 | /* | |
168 | * Issue the frame using inbound queue port | |
169 | */ | |
170 | writel(cmd->frame_phys_addr >> 3, | |
171 | &instance->reg_set->inbound_queue_port); | |
172 | ||
173 | /* | |
174 | * Wait for cmd_status to change | |
175 | */ | |
176 | for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) { | |
177 | rmb(); | |
178 | msleep(1); | |
179 | } | |
180 | ||
181 | if (frame_hdr->cmd_status == 0xff) | |
182 | return -ETIME; | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | /** | |
188 | * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds | |
189 | * @instance: Adapter soft state | |
190 | * @cmd: Command to be issued | |
191 | * | |
192 | * This function waits on an event for the command to be returned from ISR. | |
193 | * Used to issue ioctl commands. | |
194 | */ | |
195 | static int | |
196 | megasas_issue_blocked_cmd(struct megasas_instance *instance, | |
197 | struct megasas_cmd *cmd) | |
198 | { | |
199 | cmd->cmd_status = ENODATA; | |
200 | ||
201 | writel(cmd->frame_phys_addr >> 3, | |
202 | &instance->reg_set->inbound_queue_port); | |
203 | ||
204 | wait_event(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA)); | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | /** | |
210 | * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd | |
211 | * @instance: Adapter soft state | |
212 | * @cmd_to_abort: Previously issued cmd to be aborted | |
213 | * | |
214 | * MFI firmware can abort previously issued AEN comamnd (automatic event | |
215 | * notification). The megasas_issue_blocked_abort_cmd() issues such abort | |
216 | * cmd and blocks till it is completed. | |
217 | */ | |
218 | static int | |
219 | megasas_issue_blocked_abort_cmd(struct megasas_instance *instance, | |
220 | struct megasas_cmd *cmd_to_abort) | |
221 | { | |
222 | struct megasas_cmd *cmd; | |
223 | struct megasas_abort_frame *abort_fr; | |
224 | ||
225 | cmd = megasas_get_cmd(instance); | |
226 | ||
227 | if (!cmd) | |
228 | return -1; | |
229 | ||
230 | abort_fr = &cmd->frame->abort; | |
231 | ||
232 | /* | |
233 | * Prepare and issue the abort frame | |
234 | */ | |
235 | abort_fr->cmd = MFI_CMD_ABORT; | |
236 | abort_fr->cmd_status = 0xFF; | |
237 | abort_fr->flags = 0; | |
238 | abort_fr->abort_context = cmd_to_abort->index; | |
239 | abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr; | |
240 | abort_fr->abort_mfi_phys_addr_hi = 0; | |
241 | ||
242 | cmd->sync_cmd = 1; | |
243 | cmd->cmd_status = 0xFF; | |
244 | ||
245 | writel(cmd->frame_phys_addr >> 3, | |
246 | &instance->reg_set->inbound_queue_port); | |
247 | ||
248 | /* | |
249 | * Wait for this cmd to complete | |
250 | */ | |
251 | wait_event(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF)); | |
252 | ||
253 | megasas_return_cmd(instance, cmd); | |
254 | return 0; | |
255 | } | |
256 | ||
257 | /** | |
258 | * megasas_make_sgl32 - Prepares 32-bit SGL | |
259 | * @instance: Adapter soft state | |
260 | * @scp: SCSI command from the mid-layer | |
261 | * @mfi_sgl: SGL to be filled in | |
262 | * | |
263 | * If successful, this function returns the number of SG elements. Otherwise, | |
264 | * it returnes -1. | |
265 | */ | |
266 | static inline int | |
267 | megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp, | |
268 | union megasas_sgl *mfi_sgl) | |
269 | { | |
270 | int i; | |
271 | int sge_count; | |
272 | struct scatterlist *os_sgl; | |
273 | ||
274 | /* | |
275 | * Return 0 if there is no data transfer | |
276 | */ | |
277 | if (!scp->request_buffer || !scp->request_bufflen) | |
278 | return 0; | |
279 | ||
280 | if (!scp->use_sg) { | |
281 | mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev, | |
282 | scp-> | |
283 | request_buffer, | |
284 | scp-> | |
285 | request_bufflen, | |
286 | scp-> | |
287 | sc_data_direction); | |
288 | mfi_sgl->sge32[0].length = scp->request_bufflen; | |
289 | ||
290 | return 1; | |
291 | } | |
292 | ||
293 | os_sgl = (struct scatterlist *)scp->request_buffer; | |
294 | sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg, | |
295 | scp->sc_data_direction); | |
296 | ||
297 | for (i = 0; i < sge_count; i++, os_sgl++) { | |
298 | mfi_sgl->sge32[i].length = sg_dma_len(os_sgl); | |
299 | mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl); | |
300 | } | |
301 | ||
302 | return sge_count; | |
303 | } | |
304 | ||
305 | /** | |
306 | * megasas_make_sgl64 - Prepares 64-bit SGL | |
307 | * @instance: Adapter soft state | |
308 | * @scp: SCSI command from the mid-layer | |
309 | * @mfi_sgl: SGL to be filled in | |
310 | * | |
311 | * If successful, this function returns the number of SG elements. Otherwise, | |
312 | * it returnes -1. | |
313 | */ | |
314 | static inline int | |
315 | megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp, | |
316 | union megasas_sgl *mfi_sgl) | |
317 | { | |
318 | int i; | |
319 | int sge_count; | |
320 | struct scatterlist *os_sgl; | |
321 | ||
322 | /* | |
323 | * Return 0 if there is no data transfer | |
324 | */ | |
325 | if (!scp->request_buffer || !scp->request_bufflen) | |
326 | return 0; | |
327 | ||
328 | if (!scp->use_sg) { | |
329 | mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev, | |
330 | scp-> | |
331 | request_buffer, | |
332 | scp-> | |
333 | request_bufflen, | |
334 | scp-> | |
335 | sc_data_direction); | |
336 | ||
337 | mfi_sgl->sge64[0].length = scp->request_bufflen; | |
338 | ||
339 | return 1; | |
340 | } | |
341 | ||
342 | os_sgl = (struct scatterlist *)scp->request_buffer; | |
343 | sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg, | |
344 | scp->sc_data_direction); | |
345 | ||
346 | for (i = 0; i < sge_count; i++, os_sgl++) { | |
347 | mfi_sgl->sge64[i].length = sg_dma_len(os_sgl); | |
348 | mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl); | |
349 | } | |
350 | ||
351 | return sge_count; | |
352 | } | |
353 | ||
354 | /** | |
355 | * megasas_build_dcdb - Prepares a direct cdb (DCDB) command | |
356 | * @instance: Adapter soft state | |
357 | * @scp: SCSI command | |
358 | * @cmd: Command to be prepared in | |
359 | * | |
360 | * This function prepares CDB commands. These are typcially pass-through | |
361 | * commands to the devices. | |
362 | */ | |
363 | static inline int | |
364 | megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp, | |
365 | struct megasas_cmd *cmd) | |
366 | { | |
367 | u32 sge_sz; | |
368 | int sge_bytes; | |
369 | u32 is_logical; | |
370 | u32 device_id; | |
371 | u16 flags = 0; | |
372 | struct megasas_pthru_frame *pthru; | |
373 | ||
374 | is_logical = MEGASAS_IS_LOGICAL(scp); | |
375 | device_id = MEGASAS_DEV_INDEX(instance, scp); | |
376 | pthru = (struct megasas_pthru_frame *)cmd->frame; | |
377 | ||
378 | if (scp->sc_data_direction == PCI_DMA_TODEVICE) | |
379 | flags = MFI_FRAME_DIR_WRITE; | |
380 | else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) | |
381 | flags = MFI_FRAME_DIR_READ; | |
382 | else if (scp->sc_data_direction == PCI_DMA_NONE) | |
383 | flags = MFI_FRAME_DIR_NONE; | |
384 | ||
385 | /* | |
386 | * Prepare the DCDB frame | |
387 | */ | |
388 | pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO; | |
389 | pthru->cmd_status = 0x0; | |
390 | pthru->scsi_status = 0x0; | |
391 | pthru->target_id = device_id; | |
392 | pthru->lun = scp->device->lun; | |
393 | pthru->cdb_len = scp->cmd_len; | |
394 | pthru->timeout = 0; | |
395 | pthru->flags = flags; | |
396 | pthru->data_xfer_len = scp->request_bufflen; | |
397 | ||
398 | memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); | |
399 | ||
400 | /* | |
401 | * Construct SGL | |
402 | */ | |
403 | sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : | |
404 | sizeof(struct megasas_sge32); | |
405 | ||
406 | if (IS_DMA64) { | |
407 | pthru->flags |= MFI_FRAME_SGL64; | |
408 | pthru->sge_count = megasas_make_sgl64(instance, scp, | |
409 | &pthru->sgl); | |
410 | } else | |
411 | pthru->sge_count = megasas_make_sgl32(instance, scp, | |
412 | &pthru->sgl); | |
413 | ||
414 | /* | |
415 | * Sense info specific | |
416 | */ | |
417 | pthru->sense_len = SCSI_SENSE_BUFFERSIZE; | |
418 | pthru->sense_buf_phys_addr_hi = 0; | |
419 | pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr; | |
420 | ||
421 | sge_bytes = sge_sz * pthru->sge_count; | |
422 | ||
423 | /* | |
424 | * Compute the total number of frames this command consumes. FW uses | |
425 | * this number to pull sufficient number of frames from host memory. | |
426 | */ | |
427 | cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) + | |
428 | ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1; | |
429 | ||
430 | if (cmd->frame_count > 7) | |
431 | cmd->frame_count = 8; | |
432 | ||
433 | return cmd->frame_count; | |
434 | } | |
435 | ||
436 | /** | |
437 | * megasas_build_ldio - Prepares IOs to logical devices | |
438 | * @instance: Adapter soft state | |
439 | * @scp: SCSI command | |
440 | * @cmd: Command to to be prepared | |
441 | * | |
442 | * Frames (and accompanying SGLs) for regular SCSI IOs use this function. | |
443 | */ | |
444 | static inline int | |
445 | megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp, | |
446 | struct megasas_cmd *cmd) | |
447 | { | |
448 | u32 sge_sz; | |
449 | int sge_bytes; | |
450 | u32 device_id; | |
451 | u8 sc = scp->cmnd[0]; | |
452 | u16 flags = 0; | |
453 | struct megasas_io_frame *ldio; | |
454 | ||
455 | device_id = MEGASAS_DEV_INDEX(instance, scp); | |
456 | ldio = (struct megasas_io_frame *)cmd->frame; | |
457 | ||
458 | if (scp->sc_data_direction == PCI_DMA_TODEVICE) | |
459 | flags = MFI_FRAME_DIR_WRITE; | |
460 | else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) | |
461 | flags = MFI_FRAME_DIR_READ; | |
462 | ||
463 | /* | |
464 | * Preare the Logical IO frame: 2nd bit is zero for all read cmds | |
465 | */ | |
466 | ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ; | |
467 | ldio->cmd_status = 0x0; | |
468 | ldio->scsi_status = 0x0; | |
469 | ldio->target_id = device_id; | |
470 | ldio->timeout = 0; | |
471 | ldio->reserved_0 = 0; | |
472 | ldio->pad_0 = 0; | |
473 | ldio->flags = flags; | |
474 | ldio->start_lba_hi = 0; | |
475 | ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0; | |
476 | ||
477 | /* | |
478 | * 6-byte READ(0x08) or WRITE(0x0A) cdb | |
479 | */ | |
480 | if (scp->cmd_len == 6) { | |
481 | ldio->lba_count = (u32) scp->cmnd[4]; | |
482 | ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) | | |
483 | ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3]; | |
484 | ||
485 | ldio->start_lba_lo &= 0x1FFFFF; | |
486 | } | |
487 | ||
488 | /* | |
489 | * 10-byte READ(0x28) or WRITE(0x2A) cdb | |
490 | */ | |
491 | else if (scp->cmd_len == 10) { | |
492 | ldio->lba_count = (u32) scp->cmnd[8] | | |
493 | ((u32) scp->cmnd[7] << 8); | |
494 | ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) | | |
495 | ((u32) scp->cmnd[3] << 16) | | |
496 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; | |
497 | } | |
498 | ||
499 | /* | |
500 | * 12-byte READ(0xA8) or WRITE(0xAA) cdb | |
501 | */ | |
502 | else if (scp->cmd_len == 12) { | |
503 | ldio->lba_count = ((u32) scp->cmnd[6] << 24) | | |
504 | ((u32) scp->cmnd[7] << 16) | | |
505 | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; | |
506 | ||
507 | ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) | | |
508 | ((u32) scp->cmnd[3] << 16) | | |
509 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; | |
510 | } | |
511 | ||
512 | /* | |
513 | * 16-byte READ(0x88) or WRITE(0x8A) cdb | |
514 | */ | |
515 | else if (scp->cmd_len == 16) { | |
516 | ldio->lba_count = ((u32) scp->cmnd[10] << 24) | | |
517 | ((u32) scp->cmnd[11] << 16) | | |
518 | ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13]; | |
519 | ||
520 | ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) | | |
521 | ((u32) scp->cmnd[7] << 16) | | |
522 | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; | |
523 | ||
524 | ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) | | |
525 | ((u32) scp->cmnd[3] << 16) | | |
526 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; | |
527 | ||
528 | } | |
529 | ||
530 | /* | |
531 | * Construct SGL | |
532 | */ | |
533 | sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : | |
534 | sizeof(struct megasas_sge32); | |
535 | ||
536 | if (IS_DMA64) { | |
537 | ldio->flags |= MFI_FRAME_SGL64; | |
538 | ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl); | |
539 | } else | |
540 | ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl); | |
541 | ||
542 | /* | |
543 | * Sense info specific | |
544 | */ | |
545 | ldio->sense_len = SCSI_SENSE_BUFFERSIZE; | |
546 | ldio->sense_buf_phys_addr_hi = 0; | |
547 | ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr; | |
548 | ||
549 | sge_bytes = sge_sz * ldio->sge_count; | |
550 | ||
551 | cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) + | |
552 | ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1; | |
553 | ||
554 | if (cmd->frame_count > 7) | |
555 | cmd->frame_count = 8; | |
556 | ||
557 | return cmd->frame_count; | |
558 | } | |
559 | ||
560 | /** | |
561 | * megasas_build_cmd - Prepares a command packet | |
562 | * @instance: Adapter soft state | |
563 | * @scp: SCSI command | |
564 | * @frame_count: [OUT] Number of frames used to prepare this command | |
565 | */ | |
566 | static inline struct megasas_cmd *megasas_build_cmd(struct megasas_instance | |
567 | *instance, | |
568 | struct scsi_cmnd *scp, | |
569 | int *frame_count) | |
570 | { | |
571 | u32 logical_cmd; | |
572 | struct megasas_cmd *cmd; | |
573 | ||
574 | /* | |
575 | * Find out if this is logical or physical drive command. | |
576 | */ | |
577 | logical_cmd = MEGASAS_IS_LOGICAL(scp); | |
578 | ||
579 | /* | |
580 | * Logical drive command | |
581 | */ | |
582 | if (logical_cmd) { | |
583 | ||
584 | if (scp->device->id >= MEGASAS_MAX_LD) { | |
585 | scp->result = DID_BAD_TARGET << 16; | |
586 | return NULL; | |
587 | } | |
588 | ||
589 | switch (scp->cmnd[0]) { | |
590 | ||
591 | case READ_10: | |
592 | case WRITE_10: | |
593 | case READ_12: | |
594 | case WRITE_12: | |
595 | case READ_6: | |
596 | case WRITE_6: | |
597 | case READ_16: | |
598 | case WRITE_16: | |
599 | /* | |
600 | * Fail for LUN > 0 | |
601 | */ | |
602 | if (scp->device->lun) { | |
603 | scp->result = DID_BAD_TARGET << 16; | |
604 | return NULL; | |
605 | } | |
606 | ||
607 | cmd = megasas_get_cmd(instance); | |
608 | ||
609 | if (!cmd) { | |
610 | scp->result = DID_IMM_RETRY << 16; | |
611 | return NULL; | |
612 | } | |
613 | ||
614 | *frame_count = megasas_build_ldio(instance, scp, cmd); | |
615 | ||
616 | if (!(*frame_count)) { | |
617 | megasas_return_cmd(instance, cmd); | |
618 | return NULL; | |
619 | } | |
620 | ||
621 | return cmd; | |
622 | ||
623 | default: | |
624 | /* | |
625 | * Fail for LUN > 0 | |
626 | */ | |
627 | if (scp->device->lun) { | |
628 | scp->result = DID_BAD_TARGET << 16; | |
629 | return NULL; | |
630 | } | |
631 | ||
632 | cmd = megasas_get_cmd(instance); | |
633 | ||
634 | if (!cmd) { | |
635 | scp->result = DID_IMM_RETRY << 16; | |
636 | return NULL; | |
637 | } | |
638 | ||
639 | *frame_count = megasas_build_dcdb(instance, scp, cmd); | |
640 | ||
641 | if (!(*frame_count)) { | |
642 | megasas_return_cmd(instance, cmd); | |
643 | return NULL; | |
644 | } | |
645 | ||
646 | return cmd; | |
647 | } | |
648 | } else { | |
649 | cmd = megasas_get_cmd(instance); | |
650 | ||
651 | if (!cmd) { | |
652 | scp->result = DID_IMM_RETRY << 16; | |
653 | return NULL; | |
654 | } | |
655 | ||
656 | *frame_count = megasas_build_dcdb(instance, scp, cmd); | |
657 | ||
658 | if (!(*frame_count)) { | |
659 | megasas_return_cmd(instance, cmd); | |
660 | return NULL; | |
661 | } | |
662 | ||
663 | return cmd; | |
664 | } | |
665 | ||
666 | return NULL; | |
667 | } | |
668 | ||
669 | /** | |
670 | * megasas_queue_command - Queue entry point | |
671 | * @scmd: SCSI command to be queued | |
672 | * @done: Callback entry point | |
673 | */ | |
674 | static int | |
675 | megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *)) | |
676 | { | |
677 | u32 frame_count; | |
678 | unsigned long flags; | |
679 | struct megasas_cmd *cmd; | |
680 | struct megasas_instance *instance; | |
681 | ||
682 | instance = (struct megasas_instance *) | |
683 | scmd->device->host->hostdata; | |
684 | scmd->scsi_done = done; | |
685 | scmd->result = 0; | |
686 | ||
687 | cmd = megasas_build_cmd(instance, scmd, &frame_count); | |
688 | ||
689 | if (!cmd) { | |
690 | done(scmd); | |
691 | return 0; | |
692 | } | |
693 | ||
694 | cmd->scmd = scmd; | |
695 | scmd->SCp.ptr = (char *)cmd; | |
696 | scmd->SCp.sent_command = jiffies; | |
697 | ||
698 | /* | |
699 | * Issue the command to the FW | |
700 | */ | |
701 | spin_lock_irqsave(&instance->instance_lock, flags); | |
702 | instance->fw_outstanding++; | |
703 | spin_unlock_irqrestore(&instance->instance_lock, flags); | |
704 | ||
705 | writel(((cmd->frame_phys_addr >> 3) | (cmd->frame_count - 1)), | |
706 | &instance->reg_set->inbound_queue_port); | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | /** | |
712 | * megasas_wait_for_outstanding - Wait for all outstanding cmds | |
713 | * @instance: Adapter soft state | |
714 | * | |
715 | * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to | |
716 | * complete all its outstanding commands. Returns error if one or more IOs | |
717 | * are pending after this time period. It also marks the controller dead. | |
718 | */ | |
719 | static int megasas_wait_for_outstanding(struct megasas_instance *instance) | |
720 | { | |
721 | int i; | |
722 | u32 wait_time = MEGASAS_RESET_WAIT_TIME; | |
723 | ||
724 | for (i = 0; i < wait_time; i++) { | |
725 | ||
726 | if (!instance->fw_outstanding) | |
727 | break; | |
728 | ||
729 | if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) { | |
730 | printk(KERN_NOTICE "megasas: [%2d]waiting for %d " | |
731 | "commands to complete\n", i, | |
732 | instance->fw_outstanding); | |
733 | } | |
734 | ||
735 | msleep(1000); | |
736 | } | |
737 | ||
738 | if (instance->fw_outstanding) { | |
739 | instance->hw_crit_error = 1; | |
740 | return FAILED; | |
741 | } | |
742 | ||
743 | return SUCCESS; | |
744 | } | |
745 | ||
746 | /** | |
747 | * megasas_generic_reset - Generic reset routine | |
748 | * @scmd: Mid-layer SCSI command | |
749 | * | |
750 | * This routine implements a generic reset handler for device, bus and host | |
751 | * reset requests. Device, bus and host specific reset handlers can use this | |
752 | * function after they do their specific tasks. | |
753 | */ | |
754 | static int megasas_generic_reset(struct scsi_cmnd *scmd) | |
755 | { | |
756 | int ret_val; | |
757 | struct megasas_instance *instance; | |
758 | ||
759 | instance = (struct megasas_instance *)scmd->device->host->hostdata; | |
760 | ||
017560fc JG |
761 | scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n", |
762 | scmd->serial_number, scmd->cmnd[0]); | |
c4a3e0a5 BS |
763 | |
764 | if (instance->hw_crit_error) { | |
765 | printk(KERN_ERR "megasas: cannot recover from previous reset " | |
766 | "failures\n"); | |
767 | return FAILED; | |
768 | } | |
769 | ||
c4a3e0a5 | 770 | ret_val = megasas_wait_for_outstanding(instance); |
c4a3e0a5 BS |
771 | if (ret_val == SUCCESS) |
772 | printk(KERN_NOTICE "megasas: reset successful \n"); | |
773 | else | |
774 | printk(KERN_ERR "megasas: failed to do reset\n"); | |
775 | ||
c4a3e0a5 BS |
776 | return ret_val; |
777 | } | |
778 | ||
779 | static enum scsi_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd) | |
780 | { | |
781 | unsigned long seconds; | |
782 | ||
783 | if (scmd->SCp.ptr) { | |
784 | seconds = (jiffies - scmd->SCp.sent_command) / HZ; | |
785 | ||
786 | if (seconds < 90) { | |
787 | return EH_RESET_TIMER; | |
788 | } else { | |
789 | return EH_NOT_HANDLED; | |
790 | } | |
791 | } | |
792 | ||
793 | return EH_HANDLED; | |
794 | } | |
795 | ||
796 | /** | |
797 | * megasas_reset_device - Device reset handler entry point | |
798 | */ | |
799 | static int megasas_reset_device(struct scsi_cmnd *scmd) | |
800 | { | |
801 | int ret; | |
802 | ||
803 | /* | |
804 | * First wait for all commands to complete | |
805 | */ | |
806 | ret = megasas_generic_reset(scmd); | |
807 | ||
808 | return ret; | |
809 | } | |
810 | ||
811 | /** | |
812 | * megasas_reset_bus_host - Bus & host reset handler entry point | |
813 | */ | |
814 | static int megasas_reset_bus_host(struct scsi_cmnd *scmd) | |
815 | { | |
816 | int ret; | |
817 | ||
818 | /* | |
819 | * Frist wait for all commands to complete | |
820 | */ | |
821 | ret = megasas_generic_reset(scmd); | |
822 | ||
823 | return ret; | |
824 | } | |
825 | ||
826 | /** | |
827 | * megasas_service_aen - Processes an event notification | |
828 | * @instance: Adapter soft state | |
829 | * @cmd: AEN command completed by the ISR | |
830 | * | |
831 | * For AEN, driver sends a command down to FW that is held by the FW till an | |
832 | * event occurs. When an event of interest occurs, FW completes the command | |
833 | * that it was previously holding. | |
834 | * | |
835 | * This routines sends SIGIO signal to processes that have registered with the | |
836 | * driver for AEN. | |
837 | */ | |
838 | static void | |
839 | megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
840 | { | |
841 | /* | |
842 | * Don't signal app if it is just an aborted previously registered aen | |
843 | */ | |
844 | if (!cmd->abort_aen) | |
845 | kill_fasync(&megasas_async_queue, SIGIO, POLL_IN); | |
846 | else | |
847 | cmd->abort_aen = 0; | |
848 | ||
849 | instance->aen_cmd = NULL; | |
850 | megasas_return_cmd(instance, cmd); | |
851 | } | |
852 | ||
853 | /* | |
854 | * Scsi host template for megaraid_sas driver | |
855 | */ | |
856 | static struct scsi_host_template megasas_template = { | |
857 | ||
858 | .module = THIS_MODULE, | |
859 | .name = "LSI Logic SAS based MegaRAID driver", | |
860 | .proc_name = "megaraid_sas", | |
861 | .queuecommand = megasas_queue_command, | |
862 | .eh_device_reset_handler = megasas_reset_device, | |
863 | .eh_bus_reset_handler = megasas_reset_bus_host, | |
864 | .eh_host_reset_handler = megasas_reset_bus_host, | |
865 | .eh_timed_out = megasas_reset_timer, | |
866 | .use_clustering = ENABLE_CLUSTERING, | |
867 | }; | |
868 | ||
869 | /** | |
870 | * megasas_complete_int_cmd - Completes an internal command | |
871 | * @instance: Adapter soft state | |
872 | * @cmd: Command to be completed | |
873 | * | |
874 | * The megasas_issue_blocked_cmd() function waits for a command to complete | |
875 | * after it issues a command. This function wakes up that waiting routine by | |
876 | * calling wake_up() on the wait queue. | |
877 | */ | |
878 | static void | |
879 | megasas_complete_int_cmd(struct megasas_instance *instance, | |
880 | struct megasas_cmd *cmd) | |
881 | { | |
882 | cmd->cmd_status = cmd->frame->io.cmd_status; | |
883 | ||
884 | if (cmd->cmd_status == ENODATA) { | |
885 | cmd->cmd_status = 0; | |
886 | } | |
887 | wake_up(&instance->int_cmd_wait_q); | |
888 | } | |
889 | ||
890 | /** | |
891 | * megasas_complete_abort - Completes aborting a command | |
892 | * @instance: Adapter soft state | |
893 | * @cmd: Cmd that was issued to abort another cmd | |
894 | * | |
895 | * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q | |
896 | * after it issues an abort on a previously issued command. This function | |
897 | * wakes up all functions waiting on the same wait queue. | |
898 | */ | |
899 | static void | |
900 | megasas_complete_abort(struct megasas_instance *instance, | |
901 | struct megasas_cmd *cmd) | |
902 | { | |
903 | if (cmd->sync_cmd) { | |
904 | cmd->sync_cmd = 0; | |
905 | cmd->cmd_status = 0; | |
906 | wake_up(&instance->abort_cmd_wait_q); | |
907 | } | |
908 | ||
909 | return; | |
910 | } | |
911 | ||
912 | /** | |
913 | * megasas_unmap_sgbuf - Unmap SG buffers | |
914 | * @instance: Adapter soft state | |
915 | * @cmd: Completed command | |
916 | */ | |
917 | static inline void | |
918 | megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
919 | { | |
920 | dma_addr_t buf_h; | |
921 | u8 opcode; | |
922 | ||
923 | if (cmd->scmd->use_sg) { | |
924 | pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer, | |
925 | cmd->scmd->use_sg, cmd->scmd->sc_data_direction); | |
926 | return; | |
927 | } | |
928 | ||
929 | if (!cmd->scmd->request_bufflen) | |
930 | return; | |
931 | ||
932 | opcode = cmd->frame->hdr.cmd; | |
933 | ||
934 | if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) { | |
935 | if (IS_DMA64) | |
936 | buf_h = cmd->frame->io.sgl.sge64[0].phys_addr; | |
937 | else | |
938 | buf_h = cmd->frame->io.sgl.sge32[0].phys_addr; | |
939 | } else { | |
940 | if (IS_DMA64) | |
941 | buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr; | |
942 | else | |
943 | buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr; | |
944 | } | |
945 | ||
946 | pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen, | |
947 | cmd->scmd->sc_data_direction); | |
948 | return; | |
949 | } | |
950 | ||
951 | /** | |
952 | * megasas_complete_cmd - Completes a command | |
953 | * @instance: Adapter soft state | |
954 | * @cmd: Command to be completed | |
955 | * @alt_status: If non-zero, use this value as status to | |
956 | * SCSI mid-layer instead of the value returned | |
957 | * by the FW. This should be used if caller wants | |
958 | * an alternate status (as in the case of aborted | |
959 | * commands) | |
960 | */ | |
961 | static inline void | |
962 | megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, | |
963 | u8 alt_status) | |
964 | { | |
965 | int exception = 0; | |
966 | struct megasas_header *hdr = &cmd->frame->hdr; | |
967 | unsigned long flags; | |
968 | ||
969 | if (cmd->scmd) { | |
970 | cmd->scmd->SCp.ptr = (char *)0; | |
971 | } | |
972 | ||
973 | switch (hdr->cmd) { | |
974 | ||
975 | case MFI_CMD_PD_SCSI_IO: | |
976 | case MFI_CMD_LD_SCSI_IO: | |
977 | ||
978 | /* | |
979 | * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been | |
980 | * issued either through an IO path or an IOCTL path. If it | |
981 | * was via IOCTL, we will send it to internal completion. | |
982 | */ | |
983 | if (cmd->sync_cmd) { | |
984 | cmd->sync_cmd = 0; | |
985 | megasas_complete_int_cmd(instance, cmd); | |
986 | break; | |
987 | } | |
988 | ||
989 | /* | |
990 | * Don't export physical disk devices to mid-layer. | |
991 | */ | |
992 | if (!MEGASAS_IS_LOGICAL(cmd->scmd) && | |
993 | (hdr->cmd_status == MFI_STAT_OK) && | |
994 | (cmd->scmd->cmnd[0] == INQUIRY)) { | |
995 | ||
996 | if (((*(u8 *) cmd->scmd->request_buffer) & 0x1F) == | |
997 | TYPE_DISK) { | |
998 | cmd->scmd->result = DID_BAD_TARGET << 16; | |
999 | exception = 1; | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | case MFI_CMD_LD_READ: | |
1004 | case MFI_CMD_LD_WRITE: | |
1005 | ||
1006 | if (alt_status) { | |
1007 | cmd->scmd->result = alt_status << 16; | |
1008 | exception = 1; | |
1009 | } | |
1010 | ||
1011 | if (exception) { | |
1012 | ||
1013 | spin_lock_irqsave(&instance->instance_lock, flags); | |
1014 | instance->fw_outstanding--; | |
1015 | spin_unlock_irqrestore(&instance->instance_lock, flags); | |
1016 | ||
1017 | megasas_unmap_sgbuf(instance, cmd); | |
1018 | cmd->scmd->scsi_done(cmd->scmd); | |
1019 | megasas_return_cmd(instance, cmd); | |
1020 | ||
1021 | break; | |
1022 | } | |
1023 | ||
1024 | switch (hdr->cmd_status) { | |
1025 | ||
1026 | case MFI_STAT_OK: | |
1027 | cmd->scmd->result = DID_OK << 16; | |
1028 | break; | |
1029 | ||
1030 | case MFI_STAT_SCSI_IO_FAILED: | |
1031 | case MFI_STAT_LD_INIT_IN_PROGRESS: | |
1032 | cmd->scmd->result = | |
1033 | (DID_ERROR << 16) | hdr->scsi_status; | |
1034 | break; | |
1035 | ||
1036 | case MFI_STAT_SCSI_DONE_WITH_ERROR: | |
1037 | ||
1038 | cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status; | |
1039 | ||
1040 | if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) { | |
1041 | memset(cmd->scmd->sense_buffer, 0, | |
1042 | SCSI_SENSE_BUFFERSIZE); | |
1043 | memcpy(cmd->scmd->sense_buffer, cmd->sense, | |
1044 | hdr->sense_len); | |
1045 | ||
1046 | cmd->scmd->result |= DRIVER_SENSE << 24; | |
1047 | } | |
1048 | ||
1049 | break; | |
1050 | ||
1051 | case MFI_STAT_LD_OFFLINE: | |
1052 | case MFI_STAT_DEVICE_NOT_FOUND: | |
1053 | cmd->scmd->result = DID_BAD_TARGET << 16; | |
1054 | break; | |
1055 | ||
1056 | default: | |
1057 | printk(KERN_DEBUG "megasas: MFI FW status %#x\n", | |
1058 | hdr->cmd_status); | |
1059 | cmd->scmd->result = DID_ERROR << 16; | |
1060 | break; | |
1061 | } | |
1062 | ||
1063 | spin_lock_irqsave(&instance->instance_lock, flags); | |
1064 | instance->fw_outstanding--; | |
1065 | spin_unlock_irqrestore(&instance->instance_lock, flags); | |
1066 | ||
1067 | megasas_unmap_sgbuf(instance, cmd); | |
1068 | cmd->scmd->scsi_done(cmd->scmd); | |
1069 | megasas_return_cmd(instance, cmd); | |
1070 | ||
1071 | break; | |
1072 | ||
1073 | case MFI_CMD_SMP: | |
1074 | case MFI_CMD_STP: | |
1075 | case MFI_CMD_DCMD: | |
1076 | ||
1077 | /* | |
1078 | * See if got an event notification | |
1079 | */ | |
1080 | if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT) | |
1081 | megasas_service_aen(instance, cmd); | |
1082 | else | |
1083 | megasas_complete_int_cmd(instance, cmd); | |
1084 | ||
1085 | break; | |
1086 | ||
1087 | case MFI_CMD_ABORT: | |
1088 | /* | |
1089 | * Cmd issued to abort another cmd returned | |
1090 | */ | |
1091 | megasas_complete_abort(instance, cmd); | |
1092 | break; | |
1093 | ||
1094 | default: | |
1095 | printk("megasas: Unknown command completed! [0x%X]\n", | |
1096 | hdr->cmd); | |
1097 | break; | |
1098 | } | |
1099 | } | |
1100 | ||
1101 | /** | |
1102 | * megasas_deplete_reply_queue - Processes all completed commands | |
1103 | * @instance: Adapter soft state | |
1104 | * @alt_status: Alternate status to be returned to | |
1105 | * SCSI mid-layer instead of the status | |
1106 | * returned by the FW | |
1107 | */ | |
1108 | static inline int | |
1109 | megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status) | |
1110 | { | |
1111 | u32 status; | |
1112 | u32 producer; | |
1113 | u32 consumer; | |
1114 | u32 context; | |
1115 | struct megasas_cmd *cmd; | |
1116 | ||
1117 | /* | |
1118 | * Check if it is our interrupt | |
1119 | */ | |
1120 | status = readl(&instance->reg_set->outbound_intr_status); | |
1121 | ||
1122 | if (!(status & MFI_OB_INTR_STATUS_MASK)) { | |
1123 | return IRQ_NONE; | |
1124 | } | |
1125 | ||
1126 | /* | |
1127 | * Clear the interrupt by writing back the same value | |
1128 | */ | |
1129 | writel(status, &instance->reg_set->outbound_intr_status); | |
1130 | ||
1131 | producer = *instance->producer; | |
1132 | consumer = *instance->consumer; | |
1133 | ||
1134 | while (consumer != producer) { | |
1135 | context = instance->reply_queue[consumer]; | |
1136 | ||
1137 | cmd = instance->cmd_list[context]; | |
1138 | ||
1139 | megasas_complete_cmd(instance, cmd, alt_status); | |
1140 | ||
1141 | consumer++; | |
1142 | if (consumer == (instance->max_fw_cmds + 1)) { | |
1143 | consumer = 0; | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | *instance->consumer = producer; | |
1148 | ||
1149 | return IRQ_HANDLED; | |
1150 | } | |
1151 | ||
1152 | /** | |
1153 | * megasas_isr - isr entry point | |
1154 | */ | |
1155 | static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs) | |
1156 | { | |
1157 | return megasas_deplete_reply_queue((struct megasas_instance *)devp, | |
1158 | DID_OK); | |
1159 | } | |
1160 | ||
1161 | /** | |
1162 | * megasas_transition_to_ready - Move the FW to READY state | |
1163 | * @reg_set: MFI register set | |
1164 | * | |
1165 | * During the initialization, FW passes can potentially be in any one of | |
1166 | * several possible states. If the FW in operational, waiting-for-handshake | |
1167 | * states, driver must take steps to bring it to ready state. Otherwise, it | |
1168 | * has to wait for the ready state. | |
1169 | */ | |
1170 | static int | |
1171 | megasas_transition_to_ready(struct megasas_register_set __iomem * reg_set) | |
1172 | { | |
1173 | int i; | |
1174 | u8 max_wait; | |
1175 | u32 fw_state; | |
1176 | u32 cur_state; | |
1177 | ||
1178 | fw_state = readl(®_set->outbound_msg_0) & MFI_STATE_MASK; | |
1179 | ||
1180 | while (fw_state != MFI_STATE_READY) { | |
1181 | ||
1182 | printk(KERN_INFO "megasas: Waiting for FW to come to ready" | |
1183 | " state\n"); | |
1184 | switch (fw_state) { | |
1185 | ||
1186 | case MFI_STATE_FAULT: | |
1187 | ||
1188 | printk(KERN_DEBUG "megasas: FW in FAULT state!!\n"); | |
1189 | return -ENODEV; | |
1190 | ||
1191 | case MFI_STATE_WAIT_HANDSHAKE: | |
1192 | /* | |
1193 | * Set the CLR bit in inbound doorbell | |
1194 | */ | |
1195 | writel(MFI_INIT_CLEAR_HANDSHAKE, | |
1196 | ®_set->inbound_doorbell); | |
1197 | ||
1198 | max_wait = 2; | |
1199 | cur_state = MFI_STATE_WAIT_HANDSHAKE; | |
1200 | break; | |
1201 | ||
1202 | case MFI_STATE_OPERATIONAL: | |
1203 | /* | |
1204 | * Bring it to READY state; assuming max wait 2 secs | |
1205 | */ | |
1206 | megasas_disable_intr(reg_set); | |
1207 | writel(MFI_INIT_READY, ®_set->inbound_doorbell); | |
1208 | ||
1209 | max_wait = 10; | |
1210 | cur_state = MFI_STATE_OPERATIONAL; | |
1211 | break; | |
1212 | ||
1213 | case MFI_STATE_UNDEFINED: | |
1214 | /* | |
1215 | * This state should not last for more than 2 seconds | |
1216 | */ | |
1217 | max_wait = 2; | |
1218 | cur_state = MFI_STATE_UNDEFINED; | |
1219 | break; | |
1220 | ||
1221 | case MFI_STATE_BB_INIT: | |
1222 | max_wait = 2; | |
1223 | cur_state = MFI_STATE_BB_INIT; | |
1224 | break; | |
1225 | ||
1226 | case MFI_STATE_FW_INIT: | |
1227 | max_wait = 20; | |
1228 | cur_state = MFI_STATE_FW_INIT; | |
1229 | break; | |
1230 | ||
1231 | case MFI_STATE_FW_INIT_2: | |
1232 | max_wait = 20; | |
1233 | cur_state = MFI_STATE_FW_INIT_2; | |
1234 | break; | |
1235 | ||
1236 | case MFI_STATE_DEVICE_SCAN: | |
1237 | max_wait = 20; | |
1238 | cur_state = MFI_STATE_DEVICE_SCAN; | |
1239 | break; | |
1240 | ||
1241 | case MFI_STATE_FLUSH_CACHE: | |
1242 | max_wait = 20; | |
1243 | cur_state = MFI_STATE_FLUSH_CACHE; | |
1244 | break; | |
1245 | ||
1246 | default: | |
1247 | printk(KERN_DEBUG "megasas: Unknown state 0x%x\n", | |
1248 | fw_state); | |
1249 | return -ENODEV; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * The cur_state should not last for more than max_wait secs | |
1254 | */ | |
1255 | for (i = 0; i < (max_wait * 1000); i++) { | |
1256 | fw_state = MFI_STATE_MASK & | |
1257 | readl(®_set->outbound_msg_0); | |
1258 | ||
1259 | if (fw_state == cur_state) { | |
1260 | msleep(1); | |
1261 | } else | |
1262 | break; | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Return error if fw_state hasn't changed after max_wait | |
1267 | */ | |
1268 | if (fw_state == cur_state) { | |
1269 | printk(KERN_DEBUG "FW state [%d] hasn't changed " | |
1270 | "in %d secs\n", fw_state, max_wait); | |
1271 | return -ENODEV; | |
1272 | } | |
1273 | }; | |
1274 | ||
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | /** | |
1279 | * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool | |
1280 | * @instance: Adapter soft state | |
1281 | */ | |
1282 | static void megasas_teardown_frame_pool(struct megasas_instance *instance) | |
1283 | { | |
1284 | int i; | |
1285 | u32 max_cmd = instance->max_fw_cmds; | |
1286 | struct megasas_cmd *cmd; | |
1287 | ||
1288 | if (!instance->frame_dma_pool) | |
1289 | return; | |
1290 | ||
1291 | /* | |
1292 | * Return all frames to pool | |
1293 | */ | |
1294 | for (i = 0; i < max_cmd; i++) { | |
1295 | ||
1296 | cmd = instance->cmd_list[i]; | |
1297 | ||
1298 | if (cmd->frame) | |
1299 | pci_pool_free(instance->frame_dma_pool, cmd->frame, | |
1300 | cmd->frame_phys_addr); | |
1301 | ||
1302 | if (cmd->sense) | |
1303 | pci_pool_free(instance->sense_dma_pool, cmd->frame, | |
1304 | cmd->sense_phys_addr); | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * Now destroy the pool itself | |
1309 | */ | |
1310 | pci_pool_destroy(instance->frame_dma_pool); | |
1311 | pci_pool_destroy(instance->sense_dma_pool); | |
1312 | ||
1313 | instance->frame_dma_pool = NULL; | |
1314 | instance->sense_dma_pool = NULL; | |
1315 | } | |
1316 | ||
1317 | /** | |
1318 | * megasas_create_frame_pool - Creates DMA pool for cmd frames | |
1319 | * @instance: Adapter soft state | |
1320 | * | |
1321 | * Each command packet has an embedded DMA memory buffer that is used for | |
1322 | * filling MFI frame and the SG list that immediately follows the frame. This | |
1323 | * function creates those DMA memory buffers for each command packet by using | |
1324 | * PCI pool facility. | |
1325 | */ | |
1326 | static int megasas_create_frame_pool(struct megasas_instance *instance) | |
1327 | { | |
1328 | int i; | |
1329 | u32 max_cmd; | |
1330 | u32 sge_sz; | |
1331 | u32 sgl_sz; | |
1332 | u32 total_sz; | |
1333 | u32 frame_count; | |
1334 | struct megasas_cmd *cmd; | |
1335 | ||
1336 | max_cmd = instance->max_fw_cmds; | |
1337 | ||
1338 | /* | |
1339 | * Size of our frame is 64 bytes for MFI frame, followed by max SG | |
1340 | * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer | |
1341 | */ | |
1342 | sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : | |
1343 | sizeof(struct megasas_sge32); | |
1344 | ||
1345 | /* | |
1346 | * Calculated the number of 64byte frames required for SGL | |
1347 | */ | |
1348 | sgl_sz = sge_sz * instance->max_num_sge; | |
1349 | frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE; | |
1350 | ||
1351 | /* | |
1352 | * We need one extra frame for the MFI command | |
1353 | */ | |
1354 | frame_count++; | |
1355 | ||
1356 | total_sz = MEGAMFI_FRAME_SIZE * frame_count; | |
1357 | /* | |
1358 | * Use DMA pool facility provided by PCI layer | |
1359 | */ | |
1360 | instance->frame_dma_pool = pci_pool_create("megasas frame pool", | |
1361 | instance->pdev, total_sz, 64, | |
1362 | 0); | |
1363 | ||
1364 | if (!instance->frame_dma_pool) { | |
1365 | printk(KERN_DEBUG "megasas: failed to setup frame pool\n"); | |
1366 | return -ENOMEM; | |
1367 | } | |
1368 | ||
1369 | instance->sense_dma_pool = pci_pool_create("megasas sense pool", | |
1370 | instance->pdev, 128, 4, 0); | |
1371 | ||
1372 | if (!instance->sense_dma_pool) { | |
1373 | printk(KERN_DEBUG "megasas: failed to setup sense pool\n"); | |
1374 | ||
1375 | pci_pool_destroy(instance->frame_dma_pool); | |
1376 | instance->frame_dma_pool = NULL; | |
1377 | ||
1378 | return -ENOMEM; | |
1379 | } | |
1380 | ||
1381 | /* | |
1382 | * Allocate and attach a frame to each of the commands in cmd_list. | |
1383 | * By making cmd->index as the context instead of the &cmd, we can | |
1384 | * always use 32bit context regardless of the architecture | |
1385 | */ | |
1386 | for (i = 0; i < max_cmd; i++) { | |
1387 | ||
1388 | cmd = instance->cmd_list[i]; | |
1389 | ||
1390 | cmd->frame = pci_pool_alloc(instance->frame_dma_pool, | |
1391 | GFP_KERNEL, &cmd->frame_phys_addr); | |
1392 | ||
1393 | cmd->sense = pci_pool_alloc(instance->sense_dma_pool, | |
1394 | GFP_KERNEL, &cmd->sense_phys_addr); | |
1395 | ||
1396 | /* | |
1397 | * megasas_teardown_frame_pool() takes care of freeing | |
1398 | * whatever has been allocated | |
1399 | */ | |
1400 | if (!cmd->frame || !cmd->sense) { | |
1401 | printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n"); | |
1402 | megasas_teardown_frame_pool(instance); | |
1403 | return -ENOMEM; | |
1404 | } | |
1405 | ||
1406 | cmd->frame->io.context = cmd->index; | |
1407 | } | |
1408 | ||
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | /** | |
1413 | * megasas_free_cmds - Free all the cmds in the free cmd pool | |
1414 | * @instance: Adapter soft state | |
1415 | */ | |
1416 | static void megasas_free_cmds(struct megasas_instance *instance) | |
1417 | { | |
1418 | int i; | |
1419 | /* First free the MFI frame pool */ | |
1420 | megasas_teardown_frame_pool(instance); | |
1421 | ||
1422 | /* Free all the commands in the cmd_list */ | |
1423 | for (i = 0; i < instance->max_fw_cmds; i++) | |
1424 | kfree(instance->cmd_list[i]); | |
1425 | ||
1426 | /* Free the cmd_list buffer itself */ | |
1427 | kfree(instance->cmd_list); | |
1428 | instance->cmd_list = NULL; | |
1429 | ||
1430 | INIT_LIST_HEAD(&instance->cmd_pool); | |
1431 | } | |
1432 | ||
1433 | /** | |
1434 | * megasas_alloc_cmds - Allocates the command packets | |
1435 | * @instance: Adapter soft state | |
1436 | * | |
1437 | * Each command that is issued to the FW, whether IO commands from the OS or | |
1438 | * internal commands like IOCTLs, are wrapped in local data structure called | |
1439 | * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to | |
1440 | * the FW. | |
1441 | * | |
1442 | * Each frame has a 32-bit field called context (tag). This context is used | |
1443 | * to get back the megasas_cmd from the frame when a frame gets completed in | |
1444 | * the ISR. Typically the address of the megasas_cmd itself would be used as | |
1445 | * the context. But we wanted to keep the differences between 32 and 64 bit | |
1446 | * systems to the mininum. We always use 32 bit integers for the context. In | |
1447 | * this driver, the 32 bit values are the indices into an array cmd_list. | |
1448 | * This array is used only to look up the megasas_cmd given the context. The | |
1449 | * free commands themselves are maintained in a linked list called cmd_pool. | |
1450 | */ | |
1451 | static int megasas_alloc_cmds(struct megasas_instance *instance) | |
1452 | { | |
1453 | int i; | |
1454 | int j; | |
1455 | u32 max_cmd; | |
1456 | struct megasas_cmd *cmd; | |
1457 | ||
1458 | max_cmd = instance->max_fw_cmds; | |
1459 | ||
1460 | /* | |
1461 | * instance->cmd_list is an array of struct megasas_cmd pointers. | |
1462 | * Allocate the dynamic array first and then allocate individual | |
1463 | * commands. | |
1464 | */ | |
1465 | instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd, | |
1466 | GFP_KERNEL); | |
1467 | ||
1468 | if (!instance->cmd_list) { | |
1469 | printk(KERN_DEBUG "megasas: out of memory\n"); | |
1470 | return -ENOMEM; | |
1471 | } | |
1472 | ||
1473 | memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd); | |
1474 | ||
1475 | for (i = 0; i < max_cmd; i++) { | |
1476 | instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd), | |
1477 | GFP_KERNEL); | |
1478 | ||
1479 | if (!instance->cmd_list[i]) { | |
1480 | ||
1481 | for (j = 0; j < i; j++) | |
1482 | kfree(instance->cmd_list[j]); | |
1483 | ||
1484 | kfree(instance->cmd_list); | |
1485 | instance->cmd_list = NULL; | |
1486 | ||
1487 | return -ENOMEM; | |
1488 | } | |
1489 | } | |
1490 | ||
1491 | /* | |
1492 | * Add all the commands to command pool (instance->cmd_pool) | |
1493 | */ | |
1494 | for (i = 0; i < max_cmd; i++) { | |
1495 | cmd = instance->cmd_list[i]; | |
1496 | memset(cmd, 0, sizeof(struct megasas_cmd)); | |
1497 | cmd->index = i; | |
1498 | cmd->instance = instance; | |
1499 | ||
1500 | list_add_tail(&cmd->list, &instance->cmd_pool); | |
1501 | } | |
1502 | ||
1503 | /* | |
1504 | * Create a frame pool and assign one frame to each cmd | |
1505 | */ | |
1506 | if (megasas_create_frame_pool(instance)) { | |
1507 | printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n"); | |
1508 | megasas_free_cmds(instance); | |
1509 | } | |
1510 | ||
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | /** | |
1515 | * megasas_get_controller_info - Returns FW's controller structure | |
1516 | * @instance: Adapter soft state | |
1517 | * @ctrl_info: Controller information structure | |
1518 | * | |
1519 | * Issues an internal command (DCMD) to get the FW's controller structure. | |
1520 | * This information is mainly used to find out the maximum IO transfer per | |
1521 | * command supported by the FW. | |
1522 | */ | |
1523 | static int | |
1524 | megasas_get_ctrl_info(struct megasas_instance *instance, | |
1525 | struct megasas_ctrl_info *ctrl_info) | |
1526 | { | |
1527 | int ret = 0; | |
1528 | struct megasas_cmd *cmd; | |
1529 | struct megasas_dcmd_frame *dcmd; | |
1530 | struct megasas_ctrl_info *ci; | |
1531 | dma_addr_t ci_h = 0; | |
1532 | ||
1533 | cmd = megasas_get_cmd(instance); | |
1534 | ||
1535 | if (!cmd) { | |
1536 | printk(KERN_DEBUG "megasas: Failed to get a free cmd\n"); | |
1537 | return -ENOMEM; | |
1538 | } | |
1539 | ||
1540 | dcmd = &cmd->frame->dcmd; | |
1541 | ||
1542 | ci = pci_alloc_consistent(instance->pdev, | |
1543 | sizeof(struct megasas_ctrl_info), &ci_h); | |
1544 | ||
1545 | if (!ci) { | |
1546 | printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n"); | |
1547 | megasas_return_cmd(instance, cmd); | |
1548 | return -ENOMEM; | |
1549 | } | |
1550 | ||
1551 | memset(ci, 0, sizeof(*ci)); | |
1552 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
1553 | ||
1554 | dcmd->cmd = MFI_CMD_DCMD; | |
1555 | dcmd->cmd_status = 0xFF; | |
1556 | dcmd->sge_count = 1; | |
1557 | dcmd->flags = MFI_FRAME_DIR_READ; | |
1558 | dcmd->timeout = 0; | |
1559 | dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info); | |
1560 | dcmd->opcode = MR_DCMD_CTRL_GET_INFO; | |
1561 | dcmd->sgl.sge32[0].phys_addr = ci_h; | |
1562 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info); | |
1563 | ||
1564 | if (!megasas_issue_polled(instance, cmd)) { | |
1565 | ret = 0; | |
1566 | memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info)); | |
1567 | } else { | |
1568 | ret = -1; | |
1569 | } | |
1570 | ||
1571 | pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info), | |
1572 | ci, ci_h); | |
1573 | ||
1574 | megasas_return_cmd(instance, cmd); | |
1575 | return ret; | |
1576 | } | |
1577 | ||
1578 | /** | |
1579 | * megasas_init_mfi - Initializes the FW | |
1580 | * @instance: Adapter soft state | |
1581 | * | |
1582 | * This is the main function for initializing MFI firmware. | |
1583 | */ | |
1584 | static int megasas_init_mfi(struct megasas_instance *instance) | |
1585 | { | |
1586 | u32 context_sz; | |
1587 | u32 reply_q_sz; | |
1588 | u32 max_sectors_1; | |
1589 | u32 max_sectors_2; | |
1590 | struct megasas_register_set __iomem *reg_set; | |
1591 | ||
1592 | struct megasas_cmd *cmd; | |
1593 | struct megasas_ctrl_info *ctrl_info; | |
1594 | ||
1595 | struct megasas_init_frame *init_frame; | |
1596 | struct megasas_init_queue_info *initq_info; | |
1597 | dma_addr_t init_frame_h; | |
1598 | dma_addr_t initq_info_h; | |
1599 | ||
1600 | /* | |
1601 | * Map the message registers | |
1602 | */ | |
1603 | instance->base_addr = pci_resource_start(instance->pdev, 0); | |
1604 | ||
1605 | if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) { | |
1606 | printk(KERN_DEBUG "megasas: IO memory region busy!\n"); | |
1607 | return -EBUSY; | |
1608 | } | |
1609 | ||
1610 | instance->reg_set = ioremap_nocache(instance->base_addr, 8192); | |
1611 | ||
1612 | if (!instance->reg_set) { | |
1613 | printk(KERN_DEBUG "megasas: Failed to map IO mem\n"); | |
1614 | goto fail_ioremap; | |
1615 | } | |
1616 | ||
1617 | reg_set = instance->reg_set; | |
1618 | ||
1619 | /* | |
1620 | * We expect the FW state to be READY | |
1621 | */ | |
1622 | if (megasas_transition_to_ready(instance->reg_set)) | |
1623 | goto fail_ready_state; | |
1624 | ||
1625 | /* | |
1626 | * Get various operational parameters from status register | |
1627 | */ | |
1628 | instance->max_fw_cmds = readl(®_set->outbound_msg_0) & 0x00FFFF; | |
1629 | instance->max_num_sge = (readl(®_set->outbound_msg_0) & 0xFF0000) >> | |
1630 | 0x10; | |
1631 | /* | |
1632 | * Create a pool of commands | |
1633 | */ | |
1634 | if (megasas_alloc_cmds(instance)) | |
1635 | goto fail_alloc_cmds; | |
1636 | ||
1637 | /* | |
1638 | * Allocate memory for reply queue. Length of reply queue should | |
1639 | * be _one_ more than the maximum commands handled by the firmware. | |
1640 | * | |
1641 | * Note: When FW completes commands, it places corresponding contex | |
1642 | * values in this circular reply queue. This circular queue is a fairly | |
1643 | * typical producer-consumer queue. FW is the producer (of completed | |
1644 | * commands) and the driver is the consumer. | |
1645 | */ | |
1646 | context_sz = sizeof(u32); | |
1647 | reply_q_sz = context_sz * (instance->max_fw_cmds + 1); | |
1648 | ||
1649 | instance->reply_queue = pci_alloc_consistent(instance->pdev, | |
1650 | reply_q_sz, | |
1651 | &instance->reply_queue_h); | |
1652 | ||
1653 | if (!instance->reply_queue) { | |
1654 | printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n"); | |
1655 | goto fail_reply_queue; | |
1656 | } | |
1657 | ||
1658 | /* | |
1659 | * Prepare a init frame. Note the init frame points to queue info | |
1660 | * structure. Each frame has SGL allocated after first 64 bytes. For | |
1661 | * this frame - since we don't need any SGL - we use SGL's space as | |
1662 | * queue info structure | |
1663 | * | |
1664 | * We will not get a NULL command below. We just created the pool. | |
1665 | */ | |
1666 | cmd = megasas_get_cmd(instance); | |
1667 | ||
1668 | init_frame = (struct megasas_init_frame *)cmd->frame; | |
1669 | initq_info = (struct megasas_init_queue_info *) | |
1670 | ((unsigned long)init_frame + 64); | |
1671 | ||
1672 | init_frame_h = cmd->frame_phys_addr; | |
1673 | initq_info_h = init_frame_h + 64; | |
1674 | ||
1675 | memset(init_frame, 0, MEGAMFI_FRAME_SIZE); | |
1676 | memset(initq_info, 0, sizeof(struct megasas_init_queue_info)); | |
1677 | ||
1678 | initq_info->reply_queue_entries = instance->max_fw_cmds + 1; | |
1679 | initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h; | |
1680 | ||
1681 | initq_info->producer_index_phys_addr_lo = instance->producer_h; | |
1682 | initq_info->consumer_index_phys_addr_lo = instance->consumer_h; | |
1683 | ||
1684 | init_frame->cmd = MFI_CMD_INIT; | |
1685 | init_frame->cmd_status = 0xFF; | |
1686 | init_frame->queue_info_new_phys_addr_lo = initq_info_h; | |
1687 | ||
1688 | init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info); | |
1689 | ||
1690 | /* | |
1691 | * Issue the init frame in polled mode | |
1692 | */ | |
1693 | if (megasas_issue_polled(instance, cmd)) { | |
1694 | printk(KERN_DEBUG "megasas: Failed to init firmware\n"); | |
1695 | goto fail_fw_init; | |
1696 | } | |
1697 | ||
1698 | megasas_return_cmd(instance, cmd); | |
1699 | ||
1700 | ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL); | |
1701 | ||
1702 | /* | |
1703 | * Compute the max allowed sectors per IO: The controller info has two | |
1704 | * limits on max sectors. Driver should use the minimum of these two. | |
1705 | * | |
1706 | * 1 << stripe_sz_ops.min = max sectors per strip | |
1707 | * | |
1708 | * Note that older firmwares ( < FW ver 30) didn't report information | |
1709 | * to calculate max_sectors_1. So the number ended up as zero always. | |
1710 | */ | |
1711 | if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) { | |
1712 | ||
1713 | max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) * | |
1714 | ctrl_info->max_strips_per_io; | |
1715 | max_sectors_2 = ctrl_info->max_request_size; | |
1716 | ||
1717 | instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2) | |
1718 | ? max_sectors_1 : max_sectors_2; | |
1719 | } else | |
1720 | instance->max_sectors_per_req = instance->max_num_sge * | |
1721 | PAGE_SIZE / 512; | |
1722 | ||
1723 | kfree(ctrl_info); | |
1724 | ||
1725 | return 0; | |
1726 | ||
1727 | fail_fw_init: | |
1728 | megasas_return_cmd(instance, cmd); | |
1729 | ||
1730 | pci_free_consistent(instance->pdev, reply_q_sz, | |
1731 | instance->reply_queue, instance->reply_queue_h); | |
1732 | fail_reply_queue: | |
1733 | megasas_free_cmds(instance); | |
1734 | ||
1735 | fail_alloc_cmds: | |
1736 | fail_ready_state: | |
1737 | iounmap(instance->reg_set); | |
1738 | ||
1739 | fail_ioremap: | |
1740 | pci_release_regions(instance->pdev); | |
1741 | ||
1742 | return -EINVAL; | |
1743 | } | |
1744 | ||
1745 | /** | |
1746 | * megasas_release_mfi - Reverses the FW initialization | |
1747 | * @intance: Adapter soft state | |
1748 | */ | |
1749 | static void megasas_release_mfi(struct megasas_instance *instance) | |
1750 | { | |
1751 | u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1); | |
1752 | ||
1753 | pci_free_consistent(instance->pdev, reply_q_sz, | |
1754 | instance->reply_queue, instance->reply_queue_h); | |
1755 | ||
1756 | megasas_free_cmds(instance); | |
1757 | ||
1758 | iounmap(instance->reg_set); | |
1759 | ||
1760 | pci_release_regions(instance->pdev); | |
1761 | } | |
1762 | ||
1763 | /** | |
1764 | * megasas_get_seq_num - Gets latest event sequence numbers | |
1765 | * @instance: Adapter soft state | |
1766 | * @eli: FW event log sequence numbers information | |
1767 | * | |
1768 | * FW maintains a log of all events in a non-volatile area. Upper layers would | |
1769 | * usually find out the latest sequence number of the events, the seq number at | |
1770 | * the boot etc. They would "read" all the events below the latest seq number | |
1771 | * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq | |
1772 | * number), they would subsribe to AEN (asynchronous event notification) and | |
1773 | * wait for the events to happen. | |
1774 | */ | |
1775 | static int | |
1776 | megasas_get_seq_num(struct megasas_instance *instance, | |
1777 | struct megasas_evt_log_info *eli) | |
1778 | { | |
1779 | struct megasas_cmd *cmd; | |
1780 | struct megasas_dcmd_frame *dcmd; | |
1781 | struct megasas_evt_log_info *el_info; | |
1782 | dma_addr_t el_info_h = 0; | |
1783 | ||
1784 | cmd = megasas_get_cmd(instance); | |
1785 | ||
1786 | if (!cmd) { | |
1787 | return -ENOMEM; | |
1788 | } | |
1789 | ||
1790 | dcmd = &cmd->frame->dcmd; | |
1791 | el_info = pci_alloc_consistent(instance->pdev, | |
1792 | sizeof(struct megasas_evt_log_info), | |
1793 | &el_info_h); | |
1794 | ||
1795 | if (!el_info) { | |
1796 | megasas_return_cmd(instance, cmd); | |
1797 | return -ENOMEM; | |
1798 | } | |
1799 | ||
1800 | memset(el_info, 0, sizeof(*el_info)); | |
1801 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
1802 | ||
1803 | dcmd->cmd = MFI_CMD_DCMD; | |
1804 | dcmd->cmd_status = 0x0; | |
1805 | dcmd->sge_count = 1; | |
1806 | dcmd->flags = MFI_FRAME_DIR_READ; | |
1807 | dcmd->timeout = 0; | |
1808 | dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info); | |
1809 | dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO; | |
1810 | dcmd->sgl.sge32[0].phys_addr = el_info_h; | |
1811 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info); | |
1812 | ||
1813 | megasas_issue_blocked_cmd(instance, cmd); | |
1814 | ||
1815 | /* | |
1816 | * Copy the data back into callers buffer | |
1817 | */ | |
1818 | memcpy(eli, el_info, sizeof(struct megasas_evt_log_info)); | |
1819 | ||
1820 | pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info), | |
1821 | el_info, el_info_h); | |
1822 | ||
1823 | megasas_return_cmd(instance, cmd); | |
1824 | ||
1825 | return 0; | |
1826 | } | |
1827 | ||
1828 | /** | |
1829 | * megasas_register_aen - Registers for asynchronous event notification | |
1830 | * @instance: Adapter soft state | |
1831 | * @seq_num: The starting sequence number | |
1832 | * @class_locale: Class of the event | |
1833 | * | |
1834 | * This function subscribes for AEN for events beyond the @seq_num. It requests | |
1835 | * to be notified if and only if the event is of type @class_locale | |
1836 | */ | |
1837 | static int | |
1838 | megasas_register_aen(struct megasas_instance *instance, u32 seq_num, | |
1839 | u32 class_locale_word) | |
1840 | { | |
1841 | int ret_val; | |
1842 | struct megasas_cmd *cmd; | |
1843 | struct megasas_dcmd_frame *dcmd; | |
1844 | union megasas_evt_class_locale curr_aen; | |
1845 | union megasas_evt_class_locale prev_aen; | |
1846 | ||
1847 | /* | |
1848 | * If there an AEN pending already (aen_cmd), check if the | |
1849 | * class_locale of that pending AEN is inclusive of the new | |
1850 | * AEN request we currently have. If it is, then we don't have | |
1851 | * to do anything. In other words, whichever events the current | |
1852 | * AEN request is subscribing to, have already been subscribed | |
1853 | * to. | |
1854 | * | |
1855 | * If the old_cmd is _not_ inclusive, then we have to abort | |
1856 | * that command, form a class_locale that is superset of both | |
1857 | * old and current and re-issue to the FW | |
1858 | */ | |
1859 | ||
1860 | curr_aen.word = class_locale_word; | |
1861 | ||
1862 | if (instance->aen_cmd) { | |
1863 | ||
1864 | prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1]; | |
1865 | ||
1866 | /* | |
1867 | * A class whose enum value is smaller is inclusive of all | |
1868 | * higher values. If a PROGRESS (= -1) was previously | |
1869 | * registered, then a new registration requests for higher | |
1870 | * classes need not be sent to FW. They are automatically | |
1871 | * included. | |
1872 | * | |
1873 | * Locale numbers don't have such hierarchy. They are bitmap | |
1874 | * values | |
1875 | */ | |
1876 | if ((prev_aen.members.class <= curr_aen.members.class) && | |
1877 | !((prev_aen.members.locale & curr_aen.members.locale) ^ | |
1878 | curr_aen.members.locale)) { | |
1879 | /* | |
1880 | * Previously issued event registration includes | |
1881 | * current request. Nothing to do. | |
1882 | */ | |
1883 | return 0; | |
1884 | } else { | |
1885 | curr_aen.members.locale |= prev_aen.members.locale; | |
1886 | ||
1887 | if (prev_aen.members.class < curr_aen.members.class) | |
1888 | curr_aen.members.class = prev_aen.members.class; | |
1889 | ||
1890 | instance->aen_cmd->abort_aen = 1; | |
1891 | ret_val = megasas_issue_blocked_abort_cmd(instance, | |
1892 | instance-> | |
1893 | aen_cmd); | |
1894 | ||
1895 | if (ret_val) { | |
1896 | printk(KERN_DEBUG "megasas: Failed to abort " | |
1897 | "previous AEN command\n"); | |
1898 | return ret_val; | |
1899 | } | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | cmd = megasas_get_cmd(instance); | |
1904 | ||
1905 | if (!cmd) | |
1906 | return -ENOMEM; | |
1907 | ||
1908 | dcmd = &cmd->frame->dcmd; | |
1909 | ||
1910 | memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail)); | |
1911 | ||
1912 | /* | |
1913 | * Prepare DCMD for aen registration | |
1914 | */ | |
1915 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
1916 | ||
1917 | dcmd->cmd = MFI_CMD_DCMD; | |
1918 | dcmd->cmd_status = 0x0; | |
1919 | dcmd->sge_count = 1; | |
1920 | dcmd->flags = MFI_FRAME_DIR_READ; | |
1921 | dcmd->timeout = 0; | |
1922 | dcmd->data_xfer_len = sizeof(struct megasas_evt_detail); | |
1923 | dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT; | |
1924 | dcmd->mbox.w[0] = seq_num; | |
1925 | dcmd->mbox.w[1] = curr_aen.word; | |
1926 | dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h; | |
1927 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail); | |
1928 | ||
1929 | /* | |
1930 | * Store reference to the cmd used to register for AEN. When an | |
1931 | * application wants us to register for AEN, we have to abort this | |
1932 | * cmd and re-register with a new EVENT LOCALE supplied by that app | |
1933 | */ | |
1934 | instance->aen_cmd = cmd; | |
1935 | ||
1936 | /* | |
1937 | * Issue the aen registration frame | |
1938 | */ | |
1939 | writel(cmd->frame_phys_addr >> 3, | |
1940 | &instance->reg_set->inbound_queue_port); | |
1941 | ||
1942 | return 0; | |
1943 | } | |
1944 | ||
1945 | /** | |
1946 | * megasas_start_aen - Subscribes to AEN during driver load time | |
1947 | * @instance: Adapter soft state | |
1948 | */ | |
1949 | static int megasas_start_aen(struct megasas_instance *instance) | |
1950 | { | |
1951 | struct megasas_evt_log_info eli; | |
1952 | union megasas_evt_class_locale class_locale; | |
1953 | ||
1954 | /* | |
1955 | * Get the latest sequence number from FW | |
1956 | */ | |
1957 | memset(&eli, 0, sizeof(eli)); | |
1958 | ||
1959 | if (megasas_get_seq_num(instance, &eli)) | |
1960 | return -1; | |
1961 | ||
1962 | /* | |
1963 | * Register AEN with FW for latest sequence number plus 1 | |
1964 | */ | |
1965 | class_locale.members.reserved = 0; | |
1966 | class_locale.members.locale = MR_EVT_LOCALE_ALL; | |
1967 | class_locale.members.class = MR_EVT_CLASS_DEBUG; | |
1968 | ||
1969 | return megasas_register_aen(instance, eli.newest_seq_num + 1, | |
1970 | class_locale.word); | |
1971 | } | |
1972 | ||
1973 | /** | |
1974 | * megasas_io_attach - Attaches this driver to SCSI mid-layer | |
1975 | * @instance: Adapter soft state | |
1976 | */ | |
1977 | static int megasas_io_attach(struct megasas_instance *instance) | |
1978 | { | |
1979 | struct Scsi_Host *host = instance->host; | |
1980 | ||
1981 | /* | |
1982 | * Export parameters required by SCSI mid-layer | |
1983 | */ | |
1984 | host->irq = instance->pdev->irq; | |
1985 | host->unique_id = instance->unique_id; | |
1986 | host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS; | |
1987 | host->this_id = instance->init_id; | |
1988 | host->sg_tablesize = instance->max_num_sge; | |
1989 | host->max_sectors = instance->max_sectors_per_req; | |
1990 | host->cmd_per_lun = 128; | |
1991 | host->max_channel = MEGASAS_MAX_CHANNELS - 1; | |
1992 | host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL; | |
1993 | host->max_lun = MEGASAS_MAX_LUN; | |
1994 | ||
1995 | /* | |
1996 | * Notify the mid-layer about the new controller | |
1997 | */ | |
1998 | if (scsi_add_host(host, &instance->pdev->dev)) { | |
1999 | printk(KERN_DEBUG "megasas: scsi_add_host failed\n"); | |
2000 | return -ENODEV; | |
2001 | } | |
2002 | ||
2003 | /* | |
2004 | * Trigger SCSI to scan our drives | |
2005 | */ | |
2006 | scsi_scan_host(host); | |
2007 | return 0; | |
2008 | } | |
2009 | ||
2010 | /** | |
2011 | * megasas_probe_one - PCI hotplug entry point | |
2012 | * @pdev: PCI device structure | |
2013 | * @id: PCI ids of supported hotplugged adapter | |
2014 | */ | |
2015 | static int __devinit | |
2016 | megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) | |
2017 | { | |
2018 | int rval; | |
2019 | struct Scsi_Host *host; | |
2020 | struct megasas_instance *instance; | |
2021 | ||
2022 | /* | |
2023 | * Announce PCI information | |
2024 | */ | |
2025 | printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", | |
2026 | pdev->vendor, pdev->device, pdev->subsystem_vendor, | |
2027 | pdev->subsystem_device); | |
2028 | ||
2029 | printk("bus %d:slot %d:func %d\n", | |
2030 | pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); | |
2031 | ||
2032 | /* | |
2033 | * PCI prepping: enable device set bus mastering and dma mask | |
2034 | */ | |
2035 | rval = pci_enable_device(pdev); | |
2036 | ||
2037 | if (rval) { | |
2038 | return rval; | |
2039 | } | |
2040 | ||
2041 | pci_set_master(pdev); | |
2042 | ||
2043 | /* | |
2044 | * All our contollers are capable of performing 64-bit DMA | |
2045 | */ | |
2046 | if (IS_DMA64) { | |
2047 | if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) { | |
2048 | ||
2049 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) | |
2050 | goto fail_set_dma_mask; | |
2051 | } | |
2052 | } else { | |
2053 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) | |
2054 | goto fail_set_dma_mask; | |
2055 | } | |
2056 | ||
2057 | host = scsi_host_alloc(&megasas_template, | |
2058 | sizeof(struct megasas_instance)); | |
2059 | ||
2060 | if (!host) { | |
2061 | printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n"); | |
2062 | goto fail_alloc_instance; | |
2063 | } | |
2064 | ||
2065 | instance = (struct megasas_instance *)host->hostdata; | |
2066 | memset(instance, 0, sizeof(*instance)); | |
2067 | ||
2068 | instance->producer = pci_alloc_consistent(pdev, sizeof(u32), | |
2069 | &instance->producer_h); | |
2070 | instance->consumer = pci_alloc_consistent(pdev, sizeof(u32), | |
2071 | &instance->consumer_h); | |
2072 | ||
2073 | if (!instance->producer || !instance->consumer) { | |
2074 | printk(KERN_DEBUG "megasas: Failed to allocate memory for " | |
2075 | "producer, consumer\n"); | |
2076 | goto fail_alloc_dma_buf; | |
2077 | } | |
2078 | ||
2079 | *instance->producer = 0; | |
2080 | *instance->consumer = 0; | |
2081 | ||
2082 | instance->evt_detail = pci_alloc_consistent(pdev, | |
2083 | sizeof(struct | |
2084 | megasas_evt_detail), | |
2085 | &instance->evt_detail_h); | |
2086 | ||
2087 | if (!instance->evt_detail) { | |
2088 | printk(KERN_DEBUG "megasas: Failed to allocate memory for " | |
2089 | "event detail structure\n"); | |
2090 | goto fail_alloc_dma_buf; | |
2091 | } | |
2092 | ||
2093 | /* | |
2094 | * Initialize locks and queues | |
2095 | */ | |
2096 | INIT_LIST_HEAD(&instance->cmd_pool); | |
2097 | ||
2098 | init_waitqueue_head(&instance->int_cmd_wait_q); | |
2099 | init_waitqueue_head(&instance->abort_cmd_wait_q); | |
2100 | ||
2101 | spin_lock_init(&instance->cmd_pool_lock); | |
2102 | spin_lock_init(&instance->instance_lock); | |
2103 | ||
2104 | sema_init(&instance->aen_mutex, 1); | |
2105 | sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS); | |
2106 | ||
2107 | /* | |
2108 | * Initialize PCI related and misc parameters | |
2109 | */ | |
2110 | instance->pdev = pdev; | |
2111 | instance->host = host; | |
2112 | instance->unique_id = pdev->bus->number << 8 | pdev->devfn; | |
2113 | instance->init_id = MEGASAS_DEFAULT_INIT_ID; | |
2114 | ||
2115 | /* | |
2116 | * Initialize MFI Firmware | |
2117 | */ | |
2118 | if (megasas_init_mfi(instance)) | |
2119 | goto fail_init_mfi; | |
2120 | ||
2121 | /* | |
2122 | * Register IRQ | |
2123 | */ | |
2124 | if (request_irq(pdev->irq, megasas_isr, SA_SHIRQ, "megasas", instance)) { | |
2125 | printk(KERN_DEBUG "megasas: Failed to register IRQ\n"); | |
2126 | goto fail_irq; | |
2127 | } | |
2128 | ||
2129 | megasas_enable_intr(instance->reg_set); | |
2130 | ||
2131 | /* | |
2132 | * Store instance in PCI softstate | |
2133 | */ | |
2134 | pci_set_drvdata(pdev, instance); | |
2135 | ||
2136 | /* | |
2137 | * Add this controller to megasas_mgmt_info structure so that it | |
2138 | * can be exported to management applications | |
2139 | */ | |
2140 | megasas_mgmt_info.count++; | |
2141 | megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance; | |
2142 | megasas_mgmt_info.max_index++; | |
2143 | ||
2144 | /* | |
2145 | * Initiate AEN (Asynchronous Event Notification) | |
2146 | */ | |
2147 | if (megasas_start_aen(instance)) { | |
2148 | printk(KERN_DEBUG "megasas: start aen failed\n"); | |
2149 | goto fail_start_aen; | |
2150 | } | |
2151 | ||
2152 | /* | |
2153 | * Register with SCSI mid-layer | |
2154 | */ | |
2155 | if (megasas_io_attach(instance)) | |
2156 | goto fail_io_attach; | |
2157 | ||
2158 | return 0; | |
2159 | ||
2160 | fail_start_aen: | |
2161 | fail_io_attach: | |
2162 | megasas_mgmt_info.count--; | |
2163 | megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL; | |
2164 | megasas_mgmt_info.max_index--; | |
2165 | ||
2166 | pci_set_drvdata(pdev, NULL); | |
2167 | megasas_disable_intr(instance->reg_set); | |
2168 | free_irq(instance->pdev->irq, instance); | |
2169 | ||
2170 | megasas_release_mfi(instance); | |
2171 | ||
2172 | fail_irq: | |
2173 | fail_init_mfi: | |
2174 | fail_alloc_dma_buf: | |
2175 | if (instance->evt_detail) | |
2176 | pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), | |
2177 | instance->evt_detail, | |
2178 | instance->evt_detail_h); | |
2179 | ||
2180 | if (instance->producer) | |
2181 | pci_free_consistent(pdev, sizeof(u32), instance->producer, | |
2182 | instance->producer_h); | |
2183 | if (instance->consumer) | |
2184 | pci_free_consistent(pdev, sizeof(u32), instance->consumer, | |
2185 | instance->consumer_h); | |
2186 | scsi_host_put(host); | |
2187 | ||
2188 | fail_alloc_instance: | |
2189 | fail_set_dma_mask: | |
2190 | pci_disable_device(pdev); | |
2191 | ||
2192 | return -ENODEV; | |
2193 | } | |
2194 | ||
2195 | /** | |
2196 | * megasas_flush_cache - Requests FW to flush all its caches | |
2197 | * @instance: Adapter soft state | |
2198 | */ | |
2199 | static void megasas_flush_cache(struct megasas_instance *instance) | |
2200 | { | |
2201 | struct megasas_cmd *cmd; | |
2202 | struct megasas_dcmd_frame *dcmd; | |
2203 | ||
2204 | cmd = megasas_get_cmd(instance); | |
2205 | ||
2206 | if (!cmd) | |
2207 | return; | |
2208 | ||
2209 | dcmd = &cmd->frame->dcmd; | |
2210 | ||
2211 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2212 | ||
2213 | dcmd->cmd = MFI_CMD_DCMD; | |
2214 | dcmd->cmd_status = 0x0; | |
2215 | dcmd->sge_count = 0; | |
2216 | dcmd->flags = MFI_FRAME_DIR_NONE; | |
2217 | dcmd->timeout = 0; | |
2218 | dcmd->data_xfer_len = 0; | |
2219 | dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH; | |
2220 | dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE; | |
2221 | ||
2222 | megasas_issue_blocked_cmd(instance, cmd); | |
2223 | ||
2224 | megasas_return_cmd(instance, cmd); | |
2225 | ||
2226 | return; | |
2227 | } | |
2228 | ||
2229 | /** | |
2230 | * megasas_shutdown_controller - Instructs FW to shutdown the controller | |
2231 | * @instance: Adapter soft state | |
2232 | */ | |
2233 | static void megasas_shutdown_controller(struct megasas_instance *instance) | |
2234 | { | |
2235 | struct megasas_cmd *cmd; | |
2236 | struct megasas_dcmd_frame *dcmd; | |
2237 | ||
2238 | cmd = megasas_get_cmd(instance); | |
2239 | ||
2240 | if (!cmd) | |
2241 | return; | |
2242 | ||
2243 | if (instance->aen_cmd) | |
2244 | megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd); | |
2245 | ||
2246 | dcmd = &cmd->frame->dcmd; | |
2247 | ||
2248 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2249 | ||
2250 | dcmd->cmd = MFI_CMD_DCMD; | |
2251 | dcmd->cmd_status = 0x0; | |
2252 | dcmd->sge_count = 0; | |
2253 | dcmd->flags = MFI_FRAME_DIR_NONE; | |
2254 | dcmd->timeout = 0; | |
2255 | dcmd->data_xfer_len = 0; | |
2256 | dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN; | |
2257 | ||
2258 | megasas_issue_blocked_cmd(instance, cmd); | |
2259 | ||
2260 | megasas_return_cmd(instance, cmd); | |
2261 | ||
2262 | return; | |
2263 | } | |
2264 | ||
2265 | /** | |
2266 | * megasas_detach_one - PCI hot"un"plug entry point | |
2267 | * @pdev: PCI device structure | |
2268 | */ | |
2269 | static void megasas_detach_one(struct pci_dev *pdev) | |
2270 | { | |
2271 | int i; | |
2272 | struct Scsi_Host *host; | |
2273 | struct megasas_instance *instance; | |
2274 | ||
2275 | instance = pci_get_drvdata(pdev); | |
2276 | host = instance->host; | |
2277 | ||
2278 | scsi_remove_host(instance->host); | |
2279 | megasas_flush_cache(instance); | |
2280 | megasas_shutdown_controller(instance); | |
2281 | ||
2282 | /* | |
2283 | * Take the instance off the instance array. Note that we will not | |
2284 | * decrement the max_index. We let this array be sparse array | |
2285 | */ | |
2286 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { | |
2287 | if (megasas_mgmt_info.instance[i] == instance) { | |
2288 | megasas_mgmt_info.count--; | |
2289 | megasas_mgmt_info.instance[i] = NULL; | |
2290 | ||
2291 | break; | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | pci_set_drvdata(instance->pdev, NULL); | |
2296 | ||
2297 | megasas_disable_intr(instance->reg_set); | |
2298 | ||
2299 | free_irq(instance->pdev->irq, instance); | |
2300 | ||
2301 | megasas_release_mfi(instance); | |
2302 | ||
2303 | pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), | |
2304 | instance->evt_detail, instance->evt_detail_h); | |
2305 | ||
2306 | pci_free_consistent(pdev, sizeof(u32), instance->producer, | |
2307 | instance->producer_h); | |
2308 | ||
2309 | pci_free_consistent(pdev, sizeof(u32), instance->consumer, | |
2310 | instance->consumer_h); | |
2311 | ||
2312 | scsi_host_put(host); | |
2313 | ||
2314 | pci_set_drvdata(pdev, NULL); | |
2315 | ||
2316 | pci_disable_device(pdev); | |
2317 | ||
2318 | return; | |
2319 | } | |
2320 | ||
2321 | /** | |
2322 | * megasas_shutdown - Shutdown entry point | |
2323 | * @device: Generic device structure | |
2324 | */ | |
2325 | static void megasas_shutdown(struct pci_dev *pdev) | |
2326 | { | |
2327 | struct megasas_instance *instance = pci_get_drvdata(pdev); | |
2328 | megasas_flush_cache(instance); | |
2329 | } | |
2330 | ||
2331 | /** | |
2332 | * megasas_mgmt_open - char node "open" entry point | |
2333 | */ | |
2334 | static int megasas_mgmt_open(struct inode *inode, struct file *filep) | |
2335 | { | |
2336 | /* | |
2337 | * Allow only those users with admin rights | |
2338 | */ | |
2339 | if (!capable(CAP_SYS_ADMIN)) | |
2340 | return -EACCES; | |
2341 | ||
2342 | return 0; | |
2343 | } | |
2344 | ||
2345 | /** | |
2346 | * megasas_mgmt_release - char node "release" entry point | |
2347 | */ | |
2348 | static int megasas_mgmt_release(struct inode *inode, struct file *filep) | |
2349 | { | |
2350 | filep->private_data = NULL; | |
2351 | fasync_helper(-1, filep, 0, &megasas_async_queue); | |
2352 | ||
2353 | return 0; | |
2354 | } | |
2355 | ||
2356 | /** | |
2357 | * megasas_mgmt_fasync - Async notifier registration from applications | |
2358 | * | |
2359 | * This function adds the calling process to a driver global queue. When an | |
2360 | * event occurs, SIGIO will be sent to all processes in this queue. | |
2361 | */ | |
2362 | static int megasas_mgmt_fasync(int fd, struct file *filep, int mode) | |
2363 | { | |
2364 | int rc; | |
2365 | ||
0b950672 | 2366 | mutex_lock(&megasas_async_queue_mutex); |
c4a3e0a5 BS |
2367 | |
2368 | rc = fasync_helper(fd, filep, mode, &megasas_async_queue); | |
2369 | ||
0b950672 | 2370 | mutex_unlock(&megasas_async_queue_mutex); |
c4a3e0a5 BS |
2371 | |
2372 | if (rc >= 0) { | |
2373 | /* For sanity check when we get ioctl */ | |
2374 | filep->private_data = filep; | |
2375 | return 0; | |
2376 | } | |
2377 | ||
2378 | printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc); | |
2379 | ||
2380 | return rc; | |
2381 | } | |
2382 | ||
2383 | /** | |
2384 | * megasas_mgmt_fw_ioctl - Issues management ioctls to FW | |
2385 | * @instance: Adapter soft state | |
2386 | * @argp: User's ioctl packet | |
2387 | */ | |
2388 | static int | |
2389 | megasas_mgmt_fw_ioctl(struct megasas_instance *instance, | |
2390 | struct megasas_iocpacket __user * user_ioc, | |
2391 | struct megasas_iocpacket *ioc) | |
2392 | { | |
2393 | struct megasas_sge32 *kern_sge32; | |
2394 | struct megasas_cmd *cmd; | |
2395 | void *kbuff_arr[MAX_IOCTL_SGE]; | |
2396 | dma_addr_t buf_handle = 0; | |
2397 | int error = 0, i; | |
2398 | void *sense = NULL; | |
2399 | dma_addr_t sense_handle; | |
2400 | u32 *sense_ptr; | |
2401 | ||
2402 | memset(kbuff_arr, 0, sizeof(kbuff_arr)); | |
2403 | ||
2404 | if (ioc->sge_count > MAX_IOCTL_SGE) { | |
2405 | printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n", | |
2406 | ioc->sge_count, MAX_IOCTL_SGE); | |
2407 | return -EINVAL; | |
2408 | } | |
2409 | ||
2410 | cmd = megasas_get_cmd(instance); | |
2411 | if (!cmd) { | |
2412 | printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n"); | |
2413 | return -ENOMEM; | |
2414 | } | |
2415 | ||
2416 | /* | |
2417 | * User's IOCTL packet has 2 frames (maximum). Copy those two | |
2418 | * frames into our cmd's frames. cmd->frame's context will get | |
2419 | * overwritten when we copy from user's frames. So set that value | |
2420 | * alone separately | |
2421 | */ | |
2422 | memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE); | |
2423 | cmd->frame->hdr.context = cmd->index; | |
2424 | ||
2425 | /* | |
2426 | * The management interface between applications and the fw uses | |
2427 | * MFI frames. E.g, RAID configuration changes, LD property changes | |
2428 | * etc are accomplishes through different kinds of MFI frames. The | |
2429 | * driver needs to care only about substituting user buffers with | |
2430 | * kernel buffers in SGLs. The location of SGL is embedded in the | |
2431 | * struct iocpacket itself. | |
2432 | */ | |
2433 | kern_sge32 = (struct megasas_sge32 *) | |
2434 | ((unsigned long)cmd->frame + ioc->sgl_off); | |
2435 | ||
2436 | /* | |
2437 | * For each user buffer, create a mirror buffer and copy in | |
2438 | */ | |
2439 | for (i = 0; i < ioc->sge_count; i++) { | |
2440 | kbuff_arr[i] = pci_alloc_consistent(instance->pdev, | |
2441 | ioc->sgl[i].iov_len, | |
2442 | &buf_handle); | |
2443 | if (!kbuff_arr[i]) { | |
2444 | printk(KERN_DEBUG "megasas: Failed to alloc " | |
2445 | "kernel SGL buffer for IOCTL \n"); | |
2446 | error = -ENOMEM; | |
2447 | goto out; | |
2448 | } | |
2449 | ||
2450 | /* | |
2451 | * We don't change the dma_coherent_mask, so | |
2452 | * pci_alloc_consistent only returns 32bit addresses | |
2453 | */ | |
2454 | kern_sge32[i].phys_addr = (u32) buf_handle; | |
2455 | kern_sge32[i].length = ioc->sgl[i].iov_len; | |
2456 | ||
2457 | /* | |
2458 | * We created a kernel buffer corresponding to the | |
2459 | * user buffer. Now copy in from the user buffer | |
2460 | */ | |
2461 | if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base, | |
2462 | (u32) (ioc->sgl[i].iov_len))) { | |
2463 | error = -EFAULT; | |
2464 | goto out; | |
2465 | } | |
2466 | } | |
2467 | ||
2468 | if (ioc->sense_len) { | |
2469 | sense = pci_alloc_consistent(instance->pdev, ioc->sense_len, | |
2470 | &sense_handle); | |
2471 | if (!sense) { | |
2472 | error = -ENOMEM; | |
2473 | goto out; | |
2474 | } | |
2475 | ||
2476 | sense_ptr = | |
2477 | (u32 *) ((unsigned long)cmd->frame + ioc->sense_off); | |
2478 | *sense_ptr = sense_handle; | |
2479 | } | |
2480 | ||
2481 | /* | |
2482 | * Set the sync_cmd flag so that the ISR knows not to complete this | |
2483 | * cmd to the SCSI mid-layer | |
2484 | */ | |
2485 | cmd->sync_cmd = 1; | |
2486 | megasas_issue_blocked_cmd(instance, cmd); | |
2487 | cmd->sync_cmd = 0; | |
2488 | ||
2489 | /* | |
2490 | * copy out the kernel buffers to user buffers | |
2491 | */ | |
2492 | for (i = 0; i < ioc->sge_count; i++) { | |
2493 | if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i], | |
2494 | ioc->sgl[i].iov_len)) { | |
2495 | error = -EFAULT; | |
2496 | goto out; | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | /* | |
2501 | * copy out the sense | |
2502 | */ | |
2503 | if (ioc->sense_len) { | |
2504 | /* | |
2505 | * sense_ptr points to the location that has the user | |
2506 | * sense buffer address | |
2507 | */ | |
2508 | sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw + | |
2509 | ioc->sense_off); | |
2510 | ||
2511 | if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)), | |
2512 | sense, ioc->sense_len)) { | |
2513 | error = -EFAULT; | |
2514 | goto out; | |
2515 | } | |
2516 | } | |
2517 | ||
2518 | /* | |
2519 | * copy the status codes returned by the fw | |
2520 | */ | |
2521 | if (copy_to_user(&user_ioc->frame.hdr.cmd_status, | |
2522 | &cmd->frame->hdr.cmd_status, sizeof(u8))) { | |
2523 | printk(KERN_DEBUG "megasas: Error copying out cmd_status\n"); | |
2524 | error = -EFAULT; | |
2525 | } | |
2526 | ||
2527 | out: | |
2528 | if (sense) { | |
2529 | pci_free_consistent(instance->pdev, ioc->sense_len, | |
2530 | sense, sense_handle); | |
2531 | } | |
2532 | ||
2533 | for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) { | |
2534 | pci_free_consistent(instance->pdev, | |
2535 | kern_sge32[i].length, | |
2536 | kbuff_arr[i], kern_sge32[i].phys_addr); | |
2537 | } | |
2538 | ||
2539 | megasas_return_cmd(instance, cmd); | |
2540 | return error; | |
2541 | } | |
2542 | ||
2543 | static struct megasas_instance *megasas_lookup_instance(u16 host_no) | |
2544 | { | |
2545 | int i; | |
2546 | ||
2547 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { | |
2548 | ||
2549 | if ((megasas_mgmt_info.instance[i]) && | |
2550 | (megasas_mgmt_info.instance[i]->host->host_no == host_no)) | |
2551 | return megasas_mgmt_info.instance[i]; | |
2552 | } | |
2553 | ||
2554 | return NULL; | |
2555 | } | |
2556 | ||
2557 | static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg) | |
2558 | { | |
2559 | struct megasas_iocpacket __user *user_ioc = | |
2560 | (struct megasas_iocpacket __user *)arg; | |
2561 | struct megasas_iocpacket *ioc; | |
2562 | struct megasas_instance *instance; | |
2563 | int error; | |
2564 | ||
2565 | ioc = kmalloc(sizeof(*ioc), GFP_KERNEL); | |
2566 | if (!ioc) | |
2567 | return -ENOMEM; | |
2568 | ||
2569 | if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) { | |
2570 | error = -EFAULT; | |
2571 | goto out_kfree_ioc; | |
2572 | } | |
2573 | ||
2574 | instance = megasas_lookup_instance(ioc->host_no); | |
2575 | if (!instance) { | |
2576 | error = -ENODEV; | |
2577 | goto out_kfree_ioc; | |
2578 | } | |
2579 | ||
2580 | /* | |
2581 | * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds | |
2582 | */ | |
2583 | if (down_interruptible(&instance->ioctl_sem)) { | |
2584 | error = -ERESTARTSYS; | |
2585 | goto out_kfree_ioc; | |
2586 | } | |
2587 | error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc); | |
2588 | up(&instance->ioctl_sem); | |
2589 | ||
2590 | out_kfree_ioc: | |
2591 | kfree(ioc); | |
2592 | return error; | |
2593 | } | |
2594 | ||
2595 | static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg) | |
2596 | { | |
2597 | struct megasas_instance *instance; | |
2598 | struct megasas_aen aen; | |
2599 | int error; | |
2600 | ||
2601 | if (file->private_data != file) { | |
2602 | printk(KERN_DEBUG "megasas: fasync_helper was not " | |
2603 | "called first\n"); | |
2604 | return -EINVAL; | |
2605 | } | |
2606 | ||
2607 | if (copy_from_user(&aen, (void __user *)arg, sizeof(aen))) | |
2608 | return -EFAULT; | |
2609 | ||
2610 | instance = megasas_lookup_instance(aen.host_no); | |
2611 | ||
2612 | if (!instance) | |
2613 | return -ENODEV; | |
2614 | ||
2615 | down(&instance->aen_mutex); | |
2616 | error = megasas_register_aen(instance, aen.seq_num, | |
2617 | aen.class_locale_word); | |
2618 | up(&instance->aen_mutex); | |
2619 | return error; | |
2620 | } | |
2621 | ||
2622 | /** | |
2623 | * megasas_mgmt_ioctl - char node ioctl entry point | |
2624 | */ | |
2625 | static long | |
2626 | megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
2627 | { | |
2628 | switch (cmd) { | |
2629 | case MEGASAS_IOC_FIRMWARE: | |
2630 | return megasas_mgmt_ioctl_fw(file, arg); | |
2631 | ||
2632 | case MEGASAS_IOC_GET_AEN: | |
2633 | return megasas_mgmt_ioctl_aen(file, arg); | |
2634 | } | |
2635 | ||
2636 | return -ENOTTY; | |
2637 | } | |
2638 | ||
2639 | #ifdef CONFIG_COMPAT | |
2640 | static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg) | |
2641 | { | |
2642 | struct compat_megasas_iocpacket __user *cioc = | |
2643 | (struct compat_megasas_iocpacket __user *)arg; | |
2644 | struct megasas_iocpacket __user *ioc = | |
2645 | compat_alloc_user_space(sizeof(struct megasas_iocpacket)); | |
2646 | int i; | |
2647 | int error = 0; | |
2648 | ||
2649 | clear_user(ioc, sizeof(*ioc)); | |
2650 | ||
2651 | if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) || | |
2652 | copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) || | |
2653 | copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) || | |
2654 | copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) || | |
2655 | copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) || | |
2656 | copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32))) | |
2657 | return -EFAULT; | |
2658 | ||
2659 | for (i = 0; i < MAX_IOCTL_SGE; i++) { | |
2660 | compat_uptr_t ptr; | |
2661 | ||
2662 | if (get_user(ptr, &cioc->sgl[i].iov_base) || | |
2663 | put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) || | |
2664 | copy_in_user(&ioc->sgl[i].iov_len, | |
2665 | &cioc->sgl[i].iov_len, sizeof(compat_size_t))) | |
2666 | return -EFAULT; | |
2667 | } | |
2668 | ||
2669 | error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc); | |
2670 | ||
2671 | if (copy_in_user(&cioc->frame.hdr.cmd_status, | |
2672 | &ioc->frame.hdr.cmd_status, sizeof(u8))) { | |
2673 | printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n"); | |
2674 | return -EFAULT; | |
2675 | } | |
2676 | return error; | |
2677 | } | |
2678 | ||
2679 | static long | |
2680 | megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd, | |
2681 | unsigned long arg) | |
2682 | { | |
2683 | switch (cmd) { | |
2684 | case MEGASAS_IOC_FIRMWARE:{ | |
2685 | return megasas_mgmt_compat_ioctl_fw(file, arg); | |
2686 | } | |
2687 | case MEGASAS_IOC_GET_AEN: | |
2688 | return megasas_mgmt_ioctl_aen(file, arg); | |
2689 | } | |
2690 | ||
2691 | return -ENOTTY; | |
2692 | } | |
2693 | #endif | |
2694 | ||
2695 | /* | |
2696 | * File operations structure for management interface | |
2697 | */ | |
2698 | static struct file_operations megasas_mgmt_fops = { | |
2699 | .owner = THIS_MODULE, | |
2700 | .open = megasas_mgmt_open, | |
2701 | .release = megasas_mgmt_release, | |
2702 | .fasync = megasas_mgmt_fasync, | |
2703 | .unlocked_ioctl = megasas_mgmt_ioctl, | |
2704 | #ifdef CONFIG_COMPAT | |
2705 | .compat_ioctl = megasas_mgmt_compat_ioctl, | |
2706 | #endif | |
2707 | }; | |
2708 | ||
2709 | /* | |
2710 | * PCI hotplug support registration structure | |
2711 | */ | |
2712 | static struct pci_driver megasas_pci_driver = { | |
2713 | ||
2714 | .name = "megaraid_sas", | |
2715 | .id_table = megasas_pci_table, | |
2716 | .probe = megasas_probe_one, | |
2717 | .remove = __devexit_p(megasas_detach_one), | |
2718 | .shutdown = megasas_shutdown, | |
2719 | }; | |
2720 | ||
2721 | /* | |
2722 | * Sysfs driver attributes | |
2723 | */ | |
2724 | static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf) | |
2725 | { | |
2726 | return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n", | |
2727 | MEGASAS_VERSION); | |
2728 | } | |
2729 | ||
2730 | static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL); | |
2731 | ||
2732 | static ssize_t | |
2733 | megasas_sysfs_show_release_date(struct device_driver *dd, char *buf) | |
2734 | { | |
2735 | return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n", | |
2736 | MEGASAS_RELDATE); | |
2737 | } | |
2738 | ||
2739 | static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date, | |
2740 | NULL); | |
2741 | ||
2742 | /** | |
2743 | * megasas_init - Driver load entry point | |
2744 | */ | |
2745 | static int __init megasas_init(void) | |
2746 | { | |
2747 | int rval; | |
2748 | ||
2749 | /* | |
2750 | * Announce driver version and other information | |
2751 | */ | |
2752 | printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION, | |
2753 | MEGASAS_EXT_VERSION); | |
2754 | ||
2755 | memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info)); | |
2756 | ||
2757 | /* | |
2758 | * Register character device node | |
2759 | */ | |
2760 | rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops); | |
2761 | ||
2762 | if (rval < 0) { | |
2763 | printk(KERN_DEBUG "megasas: failed to open device node\n"); | |
2764 | return rval; | |
2765 | } | |
2766 | ||
2767 | megasas_mgmt_majorno = rval; | |
2768 | ||
2769 | /* | |
2770 | * Register ourselves as PCI hotplug module | |
2771 | */ | |
2772 | rval = pci_module_init(&megasas_pci_driver); | |
2773 | ||
2774 | if (rval) { | |
2775 | printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n"); | |
2776 | unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); | |
2777 | } | |
2778 | ||
2779 | driver_create_file(&megasas_pci_driver.driver, &driver_attr_version); | |
2780 | driver_create_file(&megasas_pci_driver.driver, | |
2781 | &driver_attr_release_date); | |
2782 | ||
2783 | return rval; | |
2784 | } | |
2785 | ||
2786 | /** | |
2787 | * megasas_exit - Driver unload entry point | |
2788 | */ | |
2789 | static void __exit megasas_exit(void) | |
2790 | { | |
2791 | driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version); | |
2792 | driver_remove_file(&megasas_pci_driver.driver, | |
2793 | &driver_attr_release_date); | |
2794 | ||
2795 | pci_unregister_driver(&megasas_pci_driver); | |
2796 | unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); | |
2797 | } | |
2798 | ||
2799 | module_init(megasas_init); | |
2800 | module_exit(megasas_exit); |