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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 | |
2a3681e5 | 13 | * Version : v00.00.03.05 |
c4a3e0a5 BS |
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 | ||
f3d7271c HK |
56 | {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)}, |
57 | /* xscale IOP */ | |
58 | {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)}, | |
59 | /* ppc IOP */ | |
60 | {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)}, | |
61 | /* xscale IOP, vega */ | |
62 | {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)}, | |
63 | /* xscale IOP */ | |
64 | {} | |
c4a3e0a5 BS |
65 | }; |
66 | ||
67 | MODULE_DEVICE_TABLE(pci, megasas_pci_table); | |
68 | ||
69 | static int megasas_mgmt_majorno; | |
70 | static struct megasas_mgmt_info megasas_mgmt_info; | |
71 | static struct fasync_struct *megasas_async_queue; | |
0b950672 | 72 | static DEFINE_MUTEX(megasas_async_queue_mutex); |
c4a3e0a5 | 73 | |
658dcedb SP |
74 | static u32 megasas_dbg_lvl; |
75 | ||
c4a3e0a5 BS |
76 | /** |
77 | * megasas_get_cmd - Get a command from the free pool | |
78 | * @instance: Adapter soft state | |
79 | * | |
80 | * Returns a free command from the pool | |
81 | */ | |
858119e1 | 82 | static struct megasas_cmd *megasas_get_cmd(struct megasas_instance |
c4a3e0a5 BS |
83 | *instance) |
84 | { | |
85 | unsigned long flags; | |
86 | struct megasas_cmd *cmd = NULL; | |
87 | ||
88 | spin_lock_irqsave(&instance->cmd_pool_lock, flags); | |
89 | ||
90 | if (!list_empty(&instance->cmd_pool)) { | |
91 | cmd = list_entry((&instance->cmd_pool)->next, | |
92 | struct megasas_cmd, list); | |
93 | list_del_init(&cmd->list); | |
94 | } else { | |
95 | printk(KERN_ERR "megasas: Command pool empty!\n"); | |
96 | } | |
97 | ||
98 | spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); | |
99 | return cmd; | |
100 | } | |
101 | ||
102 | /** | |
103 | * megasas_return_cmd - Return a cmd to free command pool | |
104 | * @instance: Adapter soft state | |
105 | * @cmd: Command packet to be returned to free command pool | |
106 | */ | |
107 | static inline void | |
108 | megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
109 | { | |
110 | unsigned long flags; | |
111 | ||
112 | spin_lock_irqsave(&instance->cmd_pool_lock, flags); | |
113 | ||
114 | cmd->scmd = NULL; | |
115 | list_add_tail(&cmd->list, &instance->cmd_pool); | |
116 | ||
117 | spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); | |
118 | } | |
119 | ||
1341c939 SP |
120 | |
121 | /** | |
122 | * The following functions are defined for xscale | |
123 | * (deviceid : 1064R, PERC5) controllers | |
124 | */ | |
125 | ||
c4a3e0a5 | 126 | /** |
1341c939 | 127 | * megasas_enable_intr_xscale - Enables interrupts |
c4a3e0a5 BS |
128 | * @regs: MFI register set |
129 | */ | |
130 | static inline void | |
1341c939 | 131 | megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs) |
c4a3e0a5 BS |
132 | { |
133 | writel(1, &(regs)->outbound_intr_mask); | |
134 | ||
135 | /* Dummy readl to force pci flush */ | |
136 | readl(®s->outbound_intr_mask); | |
137 | } | |
138 | ||
b274cab7 SP |
139 | /** |
140 | * megasas_disable_intr_xscale -Disables interrupt | |
141 | * @regs: MFI register set | |
142 | */ | |
143 | static inline void | |
144 | megasas_disable_intr_xscale(struct megasas_register_set __iomem * regs) | |
145 | { | |
146 | u32 mask = 0x1f; | |
147 | writel(mask, ®s->outbound_intr_mask); | |
148 | /* Dummy readl to force pci flush */ | |
149 | readl(®s->outbound_intr_mask); | |
150 | } | |
151 | ||
1341c939 SP |
152 | /** |
153 | * megasas_read_fw_status_reg_xscale - returns the current FW status value | |
154 | * @regs: MFI register set | |
155 | */ | |
156 | static u32 | |
157 | megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs) | |
158 | { | |
159 | return readl(&(regs)->outbound_msg_0); | |
160 | } | |
161 | /** | |
162 | * megasas_clear_interrupt_xscale - Check & clear interrupt | |
163 | * @regs: MFI register set | |
164 | */ | |
165 | static int | |
166 | megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs) | |
167 | { | |
168 | u32 status; | |
169 | /* | |
170 | * Check if it is our interrupt | |
171 | */ | |
172 | status = readl(®s->outbound_intr_status); | |
173 | ||
174 | if (!(status & MFI_OB_INTR_STATUS_MASK)) { | |
175 | return 1; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Clear the interrupt by writing back the same value | |
180 | */ | |
181 | writel(status, ®s->outbound_intr_status); | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | /** | |
187 | * megasas_fire_cmd_xscale - Sends command to the FW | |
188 | * @frame_phys_addr : Physical address of cmd | |
189 | * @frame_count : Number of frames for the command | |
190 | * @regs : MFI register set | |
191 | */ | |
192 | static inline void | |
193 | megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs) | |
194 | { | |
195 | writel((frame_phys_addr >> 3)|(frame_count), | |
196 | &(regs)->inbound_queue_port); | |
197 | } | |
198 | ||
199 | static struct megasas_instance_template megasas_instance_template_xscale = { | |
200 | ||
201 | .fire_cmd = megasas_fire_cmd_xscale, | |
202 | .enable_intr = megasas_enable_intr_xscale, | |
b274cab7 | 203 | .disable_intr = megasas_disable_intr_xscale, |
1341c939 SP |
204 | .clear_intr = megasas_clear_intr_xscale, |
205 | .read_fw_status_reg = megasas_read_fw_status_reg_xscale, | |
206 | }; | |
207 | ||
208 | /** | |
209 | * This is the end of set of functions & definitions specific | |
210 | * to xscale (deviceid : 1064R, PERC5) controllers | |
211 | */ | |
212 | ||
f9876f0b SP |
213 | /** |
214 | * The following functions are defined for ppc (deviceid : 0x60) | |
215 | * controllers | |
216 | */ | |
217 | ||
218 | /** | |
219 | * megasas_enable_intr_ppc - Enables interrupts | |
220 | * @regs: MFI register set | |
221 | */ | |
222 | static inline void | |
223 | megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs) | |
224 | { | |
225 | writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear); | |
226 | ||
227 | writel(~0x80000004, &(regs)->outbound_intr_mask); | |
228 | ||
229 | /* Dummy readl to force pci flush */ | |
230 | readl(®s->outbound_intr_mask); | |
231 | } | |
232 | ||
b274cab7 SP |
233 | /** |
234 | * megasas_disable_intr_ppc - Disable interrupt | |
235 | * @regs: MFI register set | |
236 | */ | |
237 | static inline void | |
238 | megasas_disable_intr_ppc(struct megasas_register_set __iomem * regs) | |
239 | { | |
240 | u32 mask = 0xFFFFFFFF; | |
241 | writel(mask, ®s->outbound_intr_mask); | |
242 | /* Dummy readl to force pci flush */ | |
243 | readl(®s->outbound_intr_mask); | |
244 | } | |
245 | ||
f9876f0b SP |
246 | /** |
247 | * megasas_read_fw_status_reg_ppc - returns the current FW status value | |
248 | * @regs: MFI register set | |
249 | */ | |
250 | static u32 | |
251 | megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs) | |
252 | { | |
253 | return readl(&(regs)->outbound_scratch_pad); | |
254 | } | |
255 | ||
256 | /** | |
257 | * megasas_clear_interrupt_ppc - Check & clear interrupt | |
258 | * @regs: MFI register set | |
259 | */ | |
260 | static int | |
261 | megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs) | |
262 | { | |
263 | u32 status; | |
264 | /* | |
265 | * Check if it is our interrupt | |
266 | */ | |
267 | status = readl(®s->outbound_intr_status); | |
268 | ||
269 | if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) { | |
270 | return 1; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Clear the interrupt by writing back the same value | |
275 | */ | |
276 | writel(status, ®s->outbound_doorbell_clear); | |
277 | ||
278 | return 0; | |
279 | } | |
280 | /** | |
281 | * megasas_fire_cmd_ppc - Sends command to the FW | |
282 | * @frame_phys_addr : Physical address of cmd | |
283 | * @frame_count : Number of frames for the command | |
284 | * @regs : MFI register set | |
285 | */ | |
286 | static inline void | |
287 | megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs) | |
288 | { | |
289 | writel((frame_phys_addr | (frame_count<<1))|1, | |
290 | &(regs)->inbound_queue_port); | |
291 | } | |
292 | ||
293 | static struct megasas_instance_template megasas_instance_template_ppc = { | |
294 | ||
295 | .fire_cmd = megasas_fire_cmd_ppc, | |
296 | .enable_intr = megasas_enable_intr_ppc, | |
b274cab7 | 297 | .disable_intr = megasas_disable_intr_ppc, |
f9876f0b SP |
298 | .clear_intr = megasas_clear_intr_ppc, |
299 | .read_fw_status_reg = megasas_read_fw_status_reg_ppc, | |
300 | }; | |
301 | ||
302 | /** | |
303 | * This is the end of set of functions & definitions | |
304 | * specific to ppc (deviceid : 0x60) controllers | |
305 | */ | |
306 | ||
c4a3e0a5 BS |
307 | /** |
308 | * megasas_issue_polled - Issues a polling command | |
309 | * @instance: Adapter soft state | |
310 | * @cmd: Command packet to be issued | |
311 | * | |
312 | * For polling, MFI requires the cmd_status to be set to 0xFF before posting. | |
313 | */ | |
314 | static int | |
315 | megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
316 | { | |
317 | int i; | |
318 | u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000; | |
319 | ||
320 | struct megasas_header *frame_hdr = &cmd->frame->hdr; | |
321 | ||
322 | frame_hdr->cmd_status = 0xFF; | |
323 | frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE; | |
324 | ||
325 | /* | |
326 | * Issue the frame using inbound queue port | |
327 | */ | |
1341c939 | 328 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
c4a3e0a5 BS |
329 | |
330 | /* | |
331 | * Wait for cmd_status to change | |
332 | */ | |
333 | for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) { | |
334 | rmb(); | |
335 | msleep(1); | |
336 | } | |
337 | ||
338 | if (frame_hdr->cmd_status == 0xff) | |
339 | return -ETIME; | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
344 | /** | |
345 | * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds | |
346 | * @instance: Adapter soft state | |
347 | * @cmd: Command to be issued | |
348 | * | |
349 | * This function waits on an event for the command to be returned from ISR. | |
2a3681e5 | 350 | * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs |
c4a3e0a5 BS |
351 | * Used to issue ioctl commands. |
352 | */ | |
353 | static int | |
354 | megasas_issue_blocked_cmd(struct megasas_instance *instance, | |
355 | struct megasas_cmd *cmd) | |
356 | { | |
357 | cmd->cmd_status = ENODATA; | |
358 | ||
1341c939 | 359 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
c4a3e0a5 | 360 | |
2a3681e5 SP |
361 | wait_event_timeout(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA), |
362 | MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ); | |
c4a3e0a5 BS |
363 | |
364 | return 0; | |
365 | } | |
366 | ||
367 | /** | |
368 | * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd | |
369 | * @instance: Adapter soft state | |
370 | * @cmd_to_abort: Previously issued cmd to be aborted | |
371 | * | |
372 | * MFI firmware can abort previously issued AEN comamnd (automatic event | |
373 | * notification). The megasas_issue_blocked_abort_cmd() issues such abort | |
2a3681e5 SP |
374 | * cmd and waits for return status. |
375 | * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs | |
c4a3e0a5 BS |
376 | */ |
377 | static int | |
378 | megasas_issue_blocked_abort_cmd(struct megasas_instance *instance, | |
379 | struct megasas_cmd *cmd_to_abort) | |
380 | { | |
381 | struct megasas_cmd *cmd; | |
382 | struct megasas_abort_frame *abort_fr; | |
383 | ||
384 | cmd = megasas_get_cmd(instance); | |
385 | ||
386 | if (!cmd) | |
387 | return -1; | |
388 | ||
389 | abort_fr = &cmd->frame->abort; | |
390 | ||
391 | /* | |
392 | * Prepare and issue the abort frame | |
393 | */ | |
394 | abort_fr->cmd = MFI_CMD_ABORT; | |
395 | abort_fr->cmd_status = 0xFF; | |
396 | abort_fr->flags = 0; | |
397 | abort_fr->abort_context = cmd_to_abort->index; | |
398 | abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr; | |
399 | abort_fr->abort_mfi_phys_addr_hi = 0; | |
400 | ||
401 | cmd->sync_cmd = 1; | |
402 | cmd->cmd_status = 0xFF; | |
403 | ||
1341c939 | 404 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
c4a3e0a5 BS |
405 | |
406 | /* | |
407 | * Wait for this cmd to complete | |
408 | */ | |
2a3681e5 SP |
409 | wait_event_timeout(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF), |
410 | MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ); | |
c4a3e0a5 BS |
411 | |
412 | megasas_return_cmd(instance, cmd); | |
413 | return 0; | |
414 | } | |
415 | ||
416 | /** | |
417 | * megasas_make_sgl32 - Prepares 32-bit SGL | |
418 | * @instance: Adapter soft state | |
419 | * @scp: SCSI command from the mid-layer | |
420 | * @mfi_sgl: SGL to be filled in | |
421 | * | |
422 | * If successful, this function returns the number of SG elements. Otherwise, | |
423 | * it returnes -1. | |
424 | */ | |
858119e1 | 425 | static int |
c4a3e0a5 BS |
426 | megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp, |
427 | union megasas_sgl *mfi_sgl) | |
428 | { | |
429 | int i; | |
430 | int sge_count; | |
431 | struct scatterlist *os_sgl; | |
432 | ||
433 | /* | |
434 | * Return 0 if there is no data transfer | |
435 | */ | |
436 | if (!scp->request_buffer || !scp->request_bufflen) | |
437 | return 0; | |
438 | ||
439 | if (!scp->use_sg) { | |
440 | mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev, | |
441 | scp-> | |
442 | request_buffer, | |
443 | scp-> | |
444 | request_bufflen, | |
445 | scp-> | |
446 | sc_data_direction); | |
447 | mfi_sgl->sge32[0].length = scp->request_bufflen; | |
448 | ||
449 | return 1; | |
450 | } | |
451 | ||
452 | os_sgl = (struct scatterlist *)scp->request_buffer; | |
453 | sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg, | |
454 | scp->sc_data_direction); | |
455 | ||
456 | for (i = 0; i < sge_count; i++, os_sgl++) { | |
457 | mfi_sgl->sge32[i].length = sg_dma_len(os_sgl); | |
458 | mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl); | |
459 | } | |
460 | ||
461 | return sge_count; | |
462 | } | |
463 | ||
464 | /** | |
465 | * megasas_make_sgl64 - Prepares 64-bit SGL | |
466 | * @instance: Adapter soft state | |
467 | * @scp: SCSI command from the mid-layer | |
468 | * @mfi_sgl: SGL to be filled in | |
469 | * | |
470 | * If successful, this function returns the number of SG elements. Otherwise, | |
471 | * it returnes -1. | |
472 | */ | |
858119e1 | 473 | static int |
c4a3e0a5 BS |
474 | megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp, |
475 | union megasas_sgl *mfi_sgl) | |
476 | { | |
477 | int i; | |
478 | int sge_count; | |
479 | struct scatterlist *os_sgl; | |
480 | ||
481 | /* | |
482 | * Return 0 if there is no data transfer | |
483 | */ | |
484 | if (!scp->request_buffer || !scp->request_bufflen) | |
485 | return 0; | |
486 | ||
487 | if (!scp->use_sg) { | |
488 | mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev, | |
489 | scp-> | |
490 | request_buffer, | |
491 | scp-> | |
492 | request_bufflen, | |
493 | scp-> | |
494 | sc_data_direction); | |
495 | ||
496 | mfi_sgl->sge64[0].length = scp->request_bufflen; | |
497 | ||
498 | return 1; | |
499 | } | |
500 | ||
501 | os_sgl = (struct scatterlist *)scp->request_buffer; | |
502 | sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg, | |
503 | scp->sc_data_direction); | |
504 | ||
505 | for (i = 0; i < sge_count; i++, os_sgl++) { | |
506 | mfi_sgl->sge64[i].length = sg_dma_len(os_sgl); | |
507 | mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl); | |
508 | } | |
509 | ||
510 | return sge_count; | |
511 | } | |
512 | ||
b1df99d9 SP |
513 | /** |
514 | * megasas_get_frame_count - Computes the number of frames | |
515 | * @sge_count : number of sg elements | |
516 | * | |
517 | * Returns the number of frames required for numnber of sge's (sge_count) | |
518 | */ | |
519 | ||
520 | u32 megasas_get_frame_count(u8 sge_count) | |
521 | { | |
522 | int num_cnt; | |
523 | int sge_bytes; | |
524 | u32 sge_sz; | |
525 | u32 frame_count=0; | |
526 | ||
527 | sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : | |
528 | sizeof(struct megasas_sge32); | |
529 | ||
530 | /* | |
531 | * Main frame can contain 2 SGEs for 64-bit SGLs and | |
532 | * 3 SGEs for 32-bit SGLs | |
533 | */ | |
534 | if (IS_DMA64) | |
535 | num_cnt = sge_count - 2; | |
536 | else | |
537 | num_cnt = sge_count - 3; | |
538 | ||
539 | if(num_cnt>0){ | |
540 | sge_bytes = sge_sz * num_cnt; | |
541 | ||
542 | frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) + | |
543 | ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ; | |
544 | } | |
545 | /* Main frame */ | |
546 | frame_count +=1; | |
547 | ||
548 | if (frame_count > 7) | |
549 | frame_count = 8; | |
550 | return frame_count; | |
551 | } | |
552 | ||
c4a3e0a5 BS |
553 | /** |
554 | * megasas_build_dcdb - Prepares a direct cdb (DCDB) command | |
555 | * @instance: Adapter soft state | |
556 | * @scp: SCSI command | |
557 | * @cmd: Command to be prepared in | |
558 | * | |
559 | * This function prepares CDB commands. These are typcially pass-through | |
560 | * commands to the devices. | |
561 | */ | |
858119e1 | 562 | static int |
c4a3e0a5 BS |
563 | megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp, |
564 | struct megasas_cmd *cmd) | |
565 | { | |
c4a3e0a5 BS |
566 | u32 is_logical; |
567 | u32 device_id; | |
568 | u16 flags = 0; | |
569 | struct megasas_pthru_frame *pthru; | |
570 | ||
571 | is_logical = MEGASAS_IS_LOGICAL(scp); | |
572 | device_id = MEGASAS_DEV_INDEX(instance, scp); | |
573 | pthru = (struct megasas_pthru_frame *)cmd->frame; | |
574 | ||
575 | if (scp->sc_data_direction == PCI_DMA_TODEVICE) | |
576 | flags = MFI_FRAME_DIR_WRITE; | |
577 | else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) | |
578 | flags = MFI_FRAME_DIR_READ; | |
579 | else if (scp->sc_data_direction == PCI_DMA_NONE) | |
580 | flags = MFI_FRAME_DIR_NONE; | |
581 | ||
582 | /* | |
583 | * Prepare the DCDB frame | |
584 | */ | |
585 | pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO; | |
586 | pthru->cmd_status = 0x0; | |
587 | pthru->scsi_status = 0x0; | |
588 | pthru->target_id = device_id; | |
589 | pthru->lun = scp->device->lun; | |
590 | pthru->cdb_len = scp->cmd_len; | |
591 | pthru->timeout = 0; | |
592 | pthru->flags = flags; | |
593 | pthru->data_xfer_len = scp->request_bufflen; | |
594 | ||
595 | memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); | |
596 | ||
597 | /* | |
598 | * Construct SGL | |
599 | */ | |
c4a3e0a5 BS |
600 | if (IS_DMA64) { |
601 | pthru->flags |= MFI_FRAME_SGL64; | |
602 | pthru->sge_count = megasas_make_sgl64(instance, scp, | |
603 | &pthru->sgl); | |
604 | } else | |
605 | pthru->sge_count = megasas_make_sgl32(instance, scp, | |
606 | &pthru->sgl); | |
607 | ||
608 | /* | |
609 | * Sense info specific | |
610 | */ | |
611 | pthru->sense_len = SCSI_SENSE_BUFFERSIZE; | |
612 | pthru->sense_buf_phys_addr_hi = 0; | |
613 | pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr; | |
614 | ||
c4a3e0a5 BS |
615 | /* |
616 | * Compute the total number of frames this command consumes. FW uses | |
617 | * this number to pull sufficient number of frames from host memory. | |
618 | */ | |
b1df99d9 | 619 | cmd->frame_count = megasas_get_frame_count(pthru->sge_count); |
c4a3e0a5 BS |
620 | |
621 | return cmd->frame_count; | |
622 | } | |
623 | ||
624 | /** | |
625 | * megasas_build_ldio - Prepares IOs to logical devices | |
626 | * @instance: Adapter soft state | |
627 | * @scp: SCSI command | |
628 | * @cmd: Command to to be prepared | |
629 | * | |
630 | * Frames (and accompanying SGLs) for regular SCSI IOs use this function. | |
631 | */ | |
858119e1 | 632 | static int |
c4a3e0a5 BS |
633 | megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp, |
634 | struct megasas_cmd *cmd) | |
635 | { | |
c4a3e0a5 BS |
636 | u32 device_id; |
637 | u8 sc = scp->cmnd[0]; | |
638 | u16 flags = 0; | |
639 | struct megasas_io_frame *ldio; | |
640 | ||
641 | device_id = MEGASAS_DEV_INDEX(instance, scp); | |
642 | ldio = (struct megasas_io_frame *)cmd->frame; | |
643 | ||
644 | if (scp->sc_data_direction == PCI_DMA_TODEVICE) | |
645 | flags = MFI_FRAME_DIR_WRITE; | |
646 | else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) | |
647 | flags = MFI_FRAME_DIR_READ; | |
648 | ||
649 | /* | |
b1df99d9 | 650 | * Prepare the Logical IO frame: 2nd bit is zero for all read cmds |
c4a3e0a5 BS |
651 | */ |
652 | ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ; | |
653 | ldio->cmd_status = 0x0; | |
654 | ldio->scsi_status = 0x0; | |
655 | ldio->target_id = device_id; | |
656 | ldio->timeout = 0; | |
657 | ldio->reserved_0 = 0; | |
658 | ldio->pad_0 = 0; | |
659 | ldio->flags = flags; | |
660 | ldio->start_lba_hi = 0; | |
661 | ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0; | |
662 | ||
663 | /* | |
664 | * 6-byte READ(0x08) or WRITE(0x0A) cdb | |
665 | */ | |
666 | if (scp->cmd_len == 6) { | |
667 | ldio->lba_count = (u32) scp->cmnd[4]; | |
668 | ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) | | |
669 | ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3]; | |
670 | ||
671 | ldio->start_lba_lo &= 0x1FFFFF; | |
672 | } | |
673 | ||
674 | /* | |
675 | * 10-byte READ(0x28) or WRITE(0x2A) cdb | |
676 | */ | |
677 | else if (scp->cmd_len == 10) { | |
678 | ldio->lba_count = (u32) scp->cmnd[8] | | |
679 | ((u32) scp->cmnd[7] << 8); | |
680 | ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) | | |
681 | ((u32) scp->cmnd[3] << 16) | | |
682 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; | |
683 | } | |
684 | ||
685 | /* | |
686 | * 12-byte READ(0xA8) or WRITE(0xAA) cdb | |
687 | */ | |
688 | else if (scp->cmd_len == 12) { | |
689 | ldio->lba_count = ((u32) scp->cmnd[6] << 24) | | |
690 | ((u32) scp->cmnd[7] << 16) | | |
691 | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; | |
692 | ||
693 | ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) | | |
694 | ((u32) scp->cmnd[3] << 16) | | |
695 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; | |
696 | } | |
697 | ||
698 | /* | |
699 | * 16-byte READ(0x88) or WRITE(0x8A) cdb | |
700 | */ | |
701 | else if (scp->cmd_len == 16) { | |
702 | ldio->lba_count = ((u32) scp->cmnd[10] << 24) | | |
703 | ((u32) scp->cmnd[11] << 16) | | |
704 | ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13]; | |
705 | ||
706 | ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) | | |
707 | ((u32) scp->cmnd[7] << 16) | | |
708 | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; | |
709 | ||
710 | ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) | | |
711 | ((u32) scp->cmnd[3] << 16) | | |
712 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; | |
713 | ||
714 | } | |
715 | ||
716 | /* | |
717 | * Construct SGL | |
718 | */ | |
c4a3e0a5 BS |
719 | if (IS_DMA64) { |
720 | ldio->flags |= MFI_FRAME_SGL64; | |
721 | ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl); | |
722 | } else | |
723 | ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl); | |
724 | ||
725 | /* | |
726 | * Sense info specific | |
727 | */ | |
728 | ldio->sense_len = SCSI_SENSE_BUFFERSIZE; | |
729 | ldio->sense_buf_phys_addr_hi = 0; | |
730 | ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr; | |
731 | ||
b1df99d9 SP |
732 | /* |
733 | * Compute the total number of frames this command consumes. FW uses | |
734 | * this number to pull sufficient number of frames from host memory. | |
735 | */ | |
736 | cmd->frame_count = megasas_get_frame_count(ldio->sge_count); | |
c4a3e0a5 BS |
737 | |
738 | return cmd->frame_count; | |
739 | } | |
740 | ||
741 | /** | |
cb59aa6a SP |
742 | * megasas_is_ldio - Checks if the cmd is for logical drive |
743 | * @scmd: SCSI command | |
744 | * | |
745 | * Called by megasas_queue_command to find out if the command to be queued | |
746 | * is a logical drive command | |
c4a3e0a5 | 747 | */ |
cb59aa6a | 748 | static inline int megasas_is_ldio(struct scsi_cmnd *cmd) |
c4a3e0a5 | 749 | { |
cb59aa6a SP |
750 | if (!MEGASAS_IS_LOGICAL(cmd)) |
751 | return 0; | |
752 | switch (cmd->cmnd[0]) { | |
753 | case READ_10: | |
754 | case WRITE_10: | |
755 | case READ_12: | |
756 | case WRITE_12: | |
757 | case READ_6: | |
758 | case WRITE_6: | |
759 | case READ_16: | |
760 | case WRITE_16: | |
761 | return 1; | |
762 | default: | |
763 | return 0; | |
c4a3e0a5 | 764 | } |
c4a3e0a5 BS |
765 | } |
766 | ||
658dcedb SP |
767 | /** |
768 | * megasas_dump_pending_frames - Dumps the frame address of all pending cmds | |
769 | * in FW | |
770 | * @instance: Adapter soft state | |
771 | */ | |
772 | static inline void | |
773 | megasas_dump_pending_frames(struct megasas_instance *instance) | |
774 | { | |
775 | struct megasas_cmd *cmd; | |
776 | int i,n; | |
777 | union megasas_sgl *mfi_sgl; | |
778 | struct megasas_io_frame *ldio; | |
779 | struct megasas_pthru_frame *pthru; | |
780 | u32 sgcount; | |
781 | u32 max_cmd = instance->max_fw_cmds; | |
782 | ||
783 | printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no); | |
784 | printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding)); | |
785 | if (IS_DMA64) | |
786 | printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no); | |
787 | else | |
788 | printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no); | |
789 | ||
790 | printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no); | |
791 | for (i = 0; i < max_cmd; i++) { | |
792 | cmd = instance->cmd_list[i]; | |
793 | if(!cmd->scmd) | |
794 | continue; | |
795 | printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr); | |
796 | if (megasas_is_ldio(cmd->scmd)){ | |
797 | ldio = (struct megasas_io_frame *)cmd->frame; | |
798 | mfi_sgl = &ldio->sgl; | |
799 | sgcount = ldio->sge_count; | |
800 | printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no, cmd->frame_count,ldio->cmd,ldio->target_id, ldio->start_lba_lo,ldio->start_lba_hi,ldio->sense_buf_phys_addr_lo,sgcount); | |
801 | } | |
802 | else { | |
803 | pthru = (struct megasas_pthru_frame *) cmd->frame; | |
804 | mfi_sgl = &pthru->sgl; | |
805 | sgcount = pthru->sge_count; | |
806 | printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no,cmd->frame_count,pthru->cmd,pthru->target_id,pthru->lun,pthru->cdb_len , pthru->data_xfer_len,pthru->sense_buf_phys_addr_lo,sgcount); | |
807 | } | |
808 | if(megasas_dbg_lvl & MEGASAS_DBG_LVL){ | |
809 | for (n = 0; n < sgcount; n++){ | |
810 | if (IS_DMA64) | |
811 | printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%08lx ",mfi_sgl->sge64[n].length , (unsigned long)mfi_sgl->sge64[n].phys_addr) ; | |
812 | else | |
813 | printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl->sge32[n].length , mfi_sgl->sge32[n].phys_addr) ; | |
814 | } | |
815 | } | |
816 | printk(KERN_ERR "\n"); | |
817 | } /*for max_cmd*/ | |
818 | printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no); | |
819 | for (i = 0; i < max_cmd; i++) { | |
820 | ||
821 | cmd = instance->cmd_list[i]; | |
822 | ||
823 | if(cmd->sync_cmd == 1){ | |
824 | printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr); | |
825 | } | |
826 | } | |
827 | printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no); | |
828 | } | |
829 | ||
c4a3e0a5 BS |
830 | /** |
831 | * megasas_queue_command - Queue entry point | |
832 | * @scmd: SCSI command to be queued | |
833 | * @done: Callback entry point | |
834 | */ | |
835 | static int | |
836 | megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *)) | |
837 | { | |
838 | u32 frame_count; | |
c4a3e0a5 BS |
839 | struct megasas_cmd *cmd; |
840 | struct megasas_instance *instance; | |
841 | ||
842 | instance = (struct megasas_instance *) | |
843 | scmd->device->host->hostdata; | |
844 | scmd->scsi_done = done; | |
845 | scmd->result = 0; | |
846 | ||
cb59aa6a SP |
847 | if (MEGASAS_IS_LOGICAL(scmd) && |
848 | (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) { | |
849 | scmd->result = DID_BAD_TARGET << 16; | |
850 | goto out_done; | |
c4a3e0a5 BS |
851 | } |
852 | ||
cb59aa6a SP |
853 | cmd = megasas_get_cmd(instance); |
854 | if (!cmd) | |
855 | return SCSI_MLQUEUE_HOST_BUSY; | |
856 | ||
857 | /* | |
858 | * Logical drive command | |
859 | */ | |
860 | if (megasas_is_ldio(scmd)) | |
861 | frame_count = megasas_build_ldio(instance, scmd, cmd); | |
862 | else | |
863 | frame_count = megasas_build_dcdb(instance, scmd, cmd); | |
864 | ||
865 | if (!frame_count) | |
866 | goto out_return_cmd; | |
867 | ||
c4a3e0a5 | 868 | cmd->scmd = scmd; |
c4a3e0a5 BS |
869 | |
870 | /* | |
871 | * Issue the command to the FW | |
872 | */ | |
e4a082c7 | 873 | atomic_inc(&instance->fw_outstanding); |
c4a3e0a5 | 874 | |
1341c939 | 875 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set); |
c4a3e0a5 BS |
876 | |
877 | return 0; | |
cb59aa6a SP |
878 | |
879 | out_return_cmd: | |
880 | megasas_return_cmd(instance, cmd); | |
881 | out_done: | |
882 | done(scmd); | |
883 | return 0; | |
c4a3e0a5 BS |
884 | } |
885 | ||
147aab6a CH |
886 | static int megasas_slave_configure(struct scsi_device *sdev) |
887 | { | |
888 | /* | |
889 | * Don't export physical disk devices to the disk driver. | |
890 | * | |
891 | * FIXME: Currently we don't export them to the midlayer at all. | |
892 | * That will be fixed once LSI engineers have audited the | |
893 | * firmware for possible issues. | |
894 | */ | |
895 | if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK) | |
896 | return -ENXIO; | |
e5b3a65f CH |
897 | |
898 | /* | |
899 | * The RAID firmware may require extended timeouts. | |
900 | */ | |
901 | if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS) | |
902 | sdev->timeout = 90 * HZ; | |
147aab6a CH |
903 | return 0; |
904 | } | |
905 | ||
c4a3e0a5 BS |
906 | /** |
907 | * megasas_wait_for_outstanding - Wait for all outstanding cmds | |
908 | * @instance: Adapter soft state | |
909 | * | |
910 | * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to | |
911 | * complete all its outstanding commands. Returns error if one or more IOs | |
912 | * are pending after this time period. It also marks the controller dead. | |
913 | */ | |
914 | static int megasas_wait_for_outstanding(struct megasas_instance *instance) | |
915 | { | |
916 | int i; | |
917 | u32 wait_time = MEGASAS_RESET_WAIT_TIME; | |
918 | ||
919 | for (i = 0; i < wait_time; i++) { | |
920 | ||
e4a082c7 SP |
921 | int outstanding = atomic_read(&instance->fw_outstanding); |
922 | ||
923 | if (!outstanding) | |
c4a3e0a5 BS |
924 | break; |
925 | ||
926 | if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) { | |
927 | printk(KERN_NOTICE "megasas: [%2d]waiting for %d " | |
e4a082c7 | 928 | "commands to complete\n",i,outstanding); |
c4a3e0a5 BS |
929 | } |
930 | ||
931 | msleep(1000); | |
932 | } | |
933 | ||
e4a082c7 | 934 | if (atomic_read(&instance->fw_outstanding)) { |
e3bbff9f SP |
935 | /* |
936 | * Send signal to FW to stop processing any pending cmds. | |
937 | * The controller will be taken offline by the OS now. | |
938 | */ | |
939 | writel(MFI_STOP_ADP, | |
940 | &instance->reg_set->inbound_doorbell); | |
658dcedb | 941 | megasas_dump_pending_frames(instance); |
c4a3e0a5 BS |
942 | instance->hw_crit_error = 1; |
943 | return FAILED; | |
944 | } | |
945 | ||
946 | return SUCCESS; | |
947 | } | |
948 | ||
949 | /** | |
950 | * megasas_generic_reset - Generic reset routine | |
951 | * @scmd: Mid-layer SCSI command | |
952 | * | |
953 | * This routine implements a generic reset handler for device, bus and host | |
954 | * reset requests. Device, bus and host specific reset handlers can use this | |
955 | * function after they do their specific tasks. | |
956 | */ | |
957 | static int megasas_generic_reset(struct scsi_cmnd *scmd) | |
958 | { | |
959 | int ret_val; | |
960 | struct megasas_instance *instance; | |
961 | ||
962 | instance = (struct megasas_instance *)scmd->device->host->hostdata; | |
963 | ||
017560fc JG |
964 | scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n", |
965 | scmd->serial_number, scmd->cmnd[0]); | |
c4a3e0a5 BS |
966 | |
967 | if (instance->hw_crit_error) { | |
968 | printk(KERN_ERR "megasas: cannot recover from previous reset " | |
969 | "failures\n"); | |
970 | return FAILED; | |
971 | } | |
972 | ||
c4a3e0a5 | 973 | ret_val = megasas_wait_for_outstanding(instance); |
c4a3e0a5 BS |
974 | if (ret_val == SUCCESS) |
975 | printk(KERN_NOTICE "megasas: reset successful \n"); | |
976 | else | |
977 | printk(KERN_ERR "megasas: failed to do reset\n"); | |
978 | ||
c4a3e0a5 BS |
979 | return ret_val; |
980 | } | |
981 | ||
c4a3e0a5 BS |
982 | /** |
983 | * megasas_reset_device - Device reset handler entry point | |
984 | */ | |
985 | static int megasas_reset_device(struct scsi_cmnd *scmd) | |
986 | { | |
987 | int ret; | |
988 | ||
989 | /* | |
990 | * First wait for all commands to complete | |
991 | */ | |
992 | ret = megasas_generic_reset(scmd); | |
993 | ||
994 | return ret; | |
995 | } | |
996 | ||
997 | /** | |
998 | * megasas_reset_bus_host - Bus & host reset handler entry point | |
999 | */ | |
1000 | static int megasas_reset_bus_host(struct scsi_cmnd *scmd) | |
1001 | { | |
1002 | int ret; | |
1003 | ||
1004 | /* | |
80682fa9 | 1005 | * First wait for all commands to complete |
c4a3e0a5 BS |
1006 | */ |
1007 | ret = megasas_generic_reset(scmd); | |
1008 | ||
1009 | return ret; | |
1010 | } | |
1011 | ||
1012 | /** | |
1013 | * megasas_service_aen - Processes an event notification | |
1014 | * @instance: Adapter soft state | |
1015 | * @cmd: AEN command completed by the ISR | |
1016 | * | |
1017 | * For AEN, driver sends a command down to FW that is held by the FW till an | |
1018 | * event occurs. When an event of interest occurs, FW completes the command | |
1019 | * that it was previously holding. | |
1020 | * | |
1021 | * This routines sends SIGIO signal to processes that have registered with the | |
1022 | * driver for AEN. | |
1023 | */ | |
1024 | static void | |
1025 | megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
1026 | { | |
1027 | /* | |
1028 | * Don't signal app if it is just an aborted previously registered aen | |
1029 | */ | |
1030 | if (!cmd->abort_aen) | |
1031 | kill_fasync(&megasas_async_queue, SIGIO, POLL_IN); | |
1032 | else | |
1033 | cmd->abort_aen = 0; | |
1034 | ||
1035 | instance->aen_cmd = NULL; | |
1036 | megasas_return_cmd(instance, cmd); | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Scsi host template for megaraid_sas driver | |
1041 | */ | |
1042 | static struct scsi_host_template megasas_template = { | |
1043 | ||
1044 | .module = THIS_MODULE, | |
1045 | .name = "LSI Logic SAS based MegaRAID driver", | |
1046 | .proc_name = "megaraid_sas", | |
147aab6a | 1047 | .slave_configure = megasas_slave_configure, |
c4a3e0a5 BS |
1048 | .queuecommand = megasas_queue_command, |
1049 | .eh_device_reset_handler = megasas_reset_device, | |
1050 | .eh_bus_reset_handler = megasas_reset_bus_host, | |
1051 | .eh_host_reset_handler = megasas_reset_bus_host, | |
c4a3e0a5 BS |
1052 | .use_clustering = ENABLE_CLUSTERING, |
1053 | }; | |
1054 | ||
1055 | /** | |
1056 | * megasas_complete_int_cmd - Completes an internal command | |
1057 | * @instance: Adapter soft state | |
1058 | * @cmd: Command to be completed | |
1059 | * | |
1060 | * The megasas_issue_blocked_cmd() function waits for a command to complete | |
1061 | * after it issues a command. This function wakes up that waiting routine by | |
1062 | * calling wake_up() on the wait queue. | |
1063 | */ | |
1064 | static void | |
1065 | megasas_complete_int_cmd(struct megasas_instance *instance, | |
1066 | struct megasas_cmd *cmd) | |
1067 | { | |
1068 | cmd->cmd_status = cmd->frame->io.cmd_status; | |
1069 | ||
1070 | if (cmd->cmd_status == ENODATA) { | |
1071 | cmd->cmd_status = 0; | |
1072 | } | |
1073 | wake_up(&instance->int_cmd_wait_q); | |
1074 | } | |
1075 | ||
1076 | /** | |
1077 | * megasas_complete_abort - Completes aborting a command | |
1078 | * @instance: Adapter soft state | |
1079 | * @cmd: Cmd that was issued to abort another cmd | |
1080 | * | |
1081 | * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q | |
1082 | * after it issues an abort on a previously issued command. This function | |
1083 | * wakes up all functions waiting on the same wait queue. | |
1084 | */ | |
1085 | static void | |
1086 | megasas_complete_abort(struct megasas_instance *instance, | |
1087 | struct megasas_cmd *cmd) | |
1088 | { | |
1089 | if (cmd->sync_cmd) { | |
1090 | cmd->sync_cmd = 0; | |
1091 | cmd->cmd_status = 0; | |
1092 | wake_up(&instance->abort_cmd_wait_q); | |
1093 | } | |
1094 | ||
1095 | return; | |
1096 | } | |
1097 | ||
1098 | /** | |
1099 | * megasas_unmap_sgbuf - Unmap SG buffers | |
1100 | * @instance: Adapter soft state | |
1101 | * @cmd: Completed command | |
1102 | */ | |
858119e1 | 1103 | static void |
c4a3e0a5 BS |
1104 | megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd) |
1105 | { | |
1106 | dma_addr_t buf_h; | |
1107 | u8 opcode; | |
1108 | ||
1109 | if (cmd->scmd->use_sg) { | |
1110 | pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer, | |
1111 | cmd->scmd->use_sg, cmd->scmd->sc_data_direction); | |
1112 | return; | |
1113 | } | |
1114 | ||
1115 | if (!cmd->scmd->request_bufflen) | |
1116 | return; | |
1117 | ||
1118 | opcode = cmd->frame->hdr.cmd; | |
1119 | ||
1120 | if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) { | |
1121 | if (IS_DMA64) | |
1122 | buf_h = cmd->frame->io.sgl.sge64[0].phys_addr; | |
1123 | else | |
1124 | buf_h = cmd->frame->io.sgl.sge32[0].phys_addr; | |
1125 | } else { | |
1126 | if (IS_DMA64) | |
1127 | buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr; | |
1128 | else | |
1129 | buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr; | |
1130 | } | |
1131 | ||
1132 | pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen, | |
1133 | cmd->scmd->sc_data_direction); | |
1134 | return; | |
1135 | } | |
1136 | ||
1137 | /** | |
1138 | * megasas_complete_cmd - Completes a command | |
1139 | * @instance: Adapter soft state | |
1140 | * @cmd: Command to be completed | |
1141 | * @alt_status: If non-zero, use this value as status to | |
1142 | * SCSI mid-layer instead of the value returned | |
1143 | * by the FW. This should be used if caller wants | |
1144 | * an alternate status (as in the case of aborted | |
1145 | * commands) | |
1146 | */ | |
858119e1 | 1147 | static void |
c4a3e0a5 BS |
1148 | megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, |
1149 | u8 alt_status) | |
1150 | { | |
1151 | int exception = 0; | |
1152 | struct megasas_header *hdr = &cmd->frame->hdr; | |
c4a3e0a5 BS |
1153 | |
1154 | if (cmd->scmd) { | |
1155 | cmd->scmd->SCp.ptr = (char *)0; | |
1156 | } | |
1157 | ||
1158 | switch (hdr->cmd) { | |
1159 | ||
1160 | case MFI_CMD_PD_SCSI_IO: | |
1161 | case MFI_CMD_LD_SCSI_IO: | |
1162 | ||
1163 | /* | |
1164 | * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been | |
1165 | * issued either through an IO path or an IOCTL path. If it | |
1166 | * was via IOCTL, we will send it to internal completion. | |
1167 | */ | |
1168 | if (cmd->sync_cmd) { | |
1169 | cmd->sync_cmd = 0; | |
1170 | megasas_complete_int_cmd(instance, cmd); | |
1171 | break; | |
1172 | } | |
1173 | ||
c4a3e0a5 BS |
1174 | case MFI_CMD_LD_READ: |
1175 | case MFI_CMD_LD_WRITE: | |
1176 | ||
1177 | if (alt_status) { | |
1178 | cmd->scmd->result = alt_status << 16; | |
1179 | exception = 1; | |
1180 | } | |
1181 | ||
1182 | if (exception) { | |
1183 | ||
e4a082c7 | 1184 | atomic_dec(&instance->fw_outstanding); |
c4a3e0a5 BS |
1185 | |
1186 | megasas_unmap_sgbuf(instance, cmd); | |
1187 | cmd->scmd->scsi_done(cmd->scmd); | |
1188 | megasas_return_cmd(instance, cmd); | |
1189 | ||
1190 | break; | |
1191 | } | |
1192 | ||
1193 | switch (hdr->cmd_status) { | |
1194 | ||
1195 | case MFI_STAT_OK: | |
1196 | cmd->scmd->result = DID_OK << 16; | |
1197 | break; | |
1198 | ||
1199 | case MFI_STAT_SCSI_IO_FAILED: | |
1200 | case MFI_STAT_LD_INIT_IN_PROGRESS: | |
1201 | cmd->scmd->result = | |
1202 | (DID_ERROR << 16) | hdr->scsi_status; | |
1203 | break; | |
1204 | ||
1205 | case MFI_STAT_SCSI_DONE_WITH_ERROR: | |
1206 | ||
1207 | cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status; | |
1208 | ||
1209 | if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) { | |
1210 | memset(cmd->scmd->sense_buffer, 0, | |
1211 | SCSI_SENSE_BUFFERSIZE); | |
1212 | memcpy(cmd->scmd->sense_buffer, cmd->sense, | |
1213 | hdr->sense_len); | |
1214 | ||
1215 | cmd->scmd->result |= DRIVER_SENSE << 24; | |
1216 | } | |
1217 | ||
1218 | break; | |
1219 | ||
1220 | case MFI_STAT_LD_OFFLINE: | |
1221 | case MFI_STAT_DEVICE_NOT_FOUND: | |
1222 | cmd->scmd->result = DID_BAD_TARGET << 16; | |
1223 | break; | |
1224 | ||
1225 | default: | |
1226 | printk(KERN_DEBUG "megasas: MFI FW status %#x\n", | |
1227 | hdr->cmd_status); | |
1228 | cmd->scmd->result = DID_ERROR << 16; | |
1229 | break; | |
1230 | } | |
1231 | ||
e4a082c7 | 1232 | atomic_dec(&instance->fw_outstanding); |
c4a3e0a5 BS |
1233 | |
1234 | megasas_unmap_sgbuf(instance, cmd); | |
1235 | cmd->scmd->scsi_done(cmd->scmd); | |
1236 | megasas_return_cmd(instance, cmd); | |
1237 | ||
1238 | break; | |
1239 | ||
1240 | case MFI_CMD_SMP: | |
1241 | case MFI_CMD_STP: | |
1242 | case MFI_CMD_DCMD: | |
1243 | ||
1244 | /* | |
1245 | * See if got an event notification | |
1246 | */ | |
1247 | if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT) | |
1248 | megasas_service_aen(instance, cmd); | |
1249 | else | |
1250 | megasas_complete_int_cmd(instance, cmd); | |
1251 | ||
1252 | break; | |
1253 | ||
1254 | case MFI_CMD_ABORT: | |
1255 | /* | |
1256 | * Cmd issued to abort another cmd returned | |
1257 | */ | |
1258 | megasas_complete_abort(instance, cmd); | |
1259 | break; | |
1260 | ||
1261 | default: | |
1262 | printk("megasas: Unknown command completed! [0x%X]\n", | |
1263 | hdr->cmd); | |
1264 | break; | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | /** | |
1269 | * megasas_deplete_reply_queue - Processes all completed commands | |
1270 | * @instance: Adapter soft state | |
1271 | * @alt_status: Alternate status to be returned to | |
1272 | * SCSI mid-layer instead of the status | |
1273 | * returned by the FW | |
1274 | */ | |
858119e1 | 1275 | static int |
c4a3e0a5 BS |
1276 | megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status) |
1277 | { | |
c4a3e0a5 BS |
1278 | /* |
1279 | * Check if it is our interrupt | |
1341c939 | 1280 | * Clear the interrupt |
c4a3e0a5 | 1281 | */ |
1341c939 | 1282 | if(instance->instancet->clear_intr(instance->reg_set)) |
c4a3e0a5 | 1283 | return IRQ_NONE; |
c4a3e0a5 | 1284 | |
5d018ad0 SP |
1285 | /* |
1286 | * Schedule the tasklet for cmd completion | |
1287 | */ | |
1288 | tasklet_schedule(&instance->isr_tasklet); | |
c4a3e0a5 BS |
1289 | |
1290 | return IRQ_HANDLED; | |
1291 | } | |
1292 | ||
1293 | /** | |
1294 | * megasas_isr - isr entry point | |
1295 | */ | |
7d12e780 | 1296 | static irqreturn_t megasas_isr(int irq, void *devp) |
c4a3e0a5 BS |
1297 | { |
1298 | return megasas_deplete_reply_queue((struct megasas_instance *)devp, | |
1299 | DID_OK); | |
1300 | } | |
1301 | ||
1302 | /** | |
1303 | * megasas_transition_to_ready - Move the FW to READY state | |
1341c939 | 1304 | * @instance: Adapter soft state |
c4a3e0a5 BS |
1305 | * |
1306 | * During the initialization, FW passes can potentially be in any one of | |
1307 | * several possible states. If the FW in operational, waiting-for-handshake | |
1308 | * states, driver must take steps to bring it to ready state. Otherwise, it | |
1309 | * has to wait for the ready state. | |
1310 | */ | |
1311 | static int | |
1341c939 | 1312 | megasas_transition_to_ready(struct megasas_instance* instance) |
c4a3e0a5 BS |
1313 | { |
1314 | int i; | |
1315 | u8 max_wait; | |
1316 | u32 fw_state; | |
1317 | u32 cur_state; | |
1318 | ||
1341c939 | 1319 | fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK; |
c4a3e0a5 | 1320 | |
e3bbff9f SP |
1321 | if (fw_state != MFI_STATE_READY) |
1322 | printk(KERN_INFO "megasas: Waiting for FW to come to ready" | |
1323 | " state\n"); | |
1324 | ||
c4a3e0a5 BS |
1325 | while (fw_state != MFI_STATE_READY) { |
1326 | ||
c4a3e0a5 BS |
1327 | switch (fw_state) { |
1328 | ||
1329 | case MFI_STATE_FAULT: | |
1330 | ||
1331 | printk(KERN_DEBUG "megasas: FW in FAULT state!!\n"); | |
1332 | return -ENODEV; | |
1333 | ||
1334 | case MFI_STATE_WAIT_HANDSHAKE: | |
1335 | /* | |
1336 | * Set the CLR bit in inbound doorbell | |
1337 | */ | |
e3bbff9f | 1338 | writel(MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG, |
1341c939 | 1339 | &instance->reg_set->inbound_doorbell); |
c4a3e0a5 BS |
1340 | |
1341 | max_wait = 2; | |
1342 | cur_state = MFI_STATE_WAIT_HANDSHAKE; | |
1343 | break; | |
1344 | ||
e3bbff9f SP |
1345 | case MFI_STATE_BOOT_MESSAGE_PENDING: |
1346 | writel(MFI_INIT_HOTPLUG, | |
1347 | &instance->reg_set->inbound_doorbell); | |
1348 | ||
1349 | max_wait = 10; | |
1350 | cur_state = MFI_STATE_BOOT_MESSAGE_PENDING; | |
1351 | break; | |
1352 | ||
c4a3e0a5 BS |
1353 | case MFI_STATE_OPERATIONAL: |
1354 | /* | |
e3bbff9f | 1355 | * Bring it to READY state; assuming max wait 10 secs |
c4a3e0a5 | 1356 | */ |
b274cab7 | 1357 | instance->instancet->disable_intr(instance->reg_set); |
e3bbff9f | 1358 | writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell); |
c4a3e0a5 BS |
1359 | |
1360 | max_wait = 10; | |
1361 | cur_state = MFI_STATE_OPERATIONAL; | |
1362 | break; | |
1363 | ||
1364 | case MFI_STATE_UNDEFINED: | |
1365 | /* | |
1366 | * This state should not last for more than 2 seconds | |
1367 | */ | |
1368 | max_wait = 2; | |
1369 | cur_state = MFI_STATE_UNDEFINED; | |
1370 | break; | |
1371 | ||
1372 | case MFI_STATE_BB_INIT: | |
1373 | max_wait = 2; | |
1374 | cur_state = MFI_STATE_BB_INIT; | |
1375 | break; | |
1376 | ||
1377 | case MFI_STATE_FW_INIT: | |
1378 | max_wait = 20; | |
1379 | cur_state = MFI_STATE_FW_INIT; | |
1380 | break; | |
1381 | ||
1382 | case MFI_STATE_FW_INIT_2: | |
1383 | max_wait = 20; | |
1384 | cur_state = MFI_STATE_FW_INIT_2; | |
1385 | break; | |
1386 | ||
1387 | case MFI_STATE_DEVICE_SCAN: | |
1388 | max_wait = 20; | |
1389 | cur_state = MFI_STATE_DEVICE_SCAN; | |
1390 | break; | |
1391 | ||
1392 | case MFI_STATE_FLUSH_CACHE: | |
1393 | max_wait = 20; | |
1394 | cur_state = MFI_STATE_FLUSH_CACHE; | |
1395 | break; | |
1396 | ||
1397 | default: | |
1398 | printk(KERN_DEBUG "megasas: Unknown state 0x%x\n", | |
1399 | fw_state); | |
1400 | return -ENODEV; | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * The cur_state should not last for more than max_wait secs | |
1405 | */ | |
1406 | for (i = 0; i < (max_wait * 1000); i++) { | |
1341c939 SP |
1407 | fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & |
1408 | MFI_STATE_MASK ; | |
c4a3e0a5 BS |
1409 | |
1410 | if (fw_state == cur_state) { | |
1411 | msleep(1); | |
1412 | } else | |
1413 | break; | |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | * Return error if fw_state hasn't changed after max_wait | |
1418 | */ | |
1419 | if (fw_state == cur_state) { | |
1420 | printk(KERN_DEBUG "FW state [%d] hasn't changed " | |
1421 | "in %d secs\n", fw_state, max_wait); | |
1422 | return -ENODEV; | |
1423 | } | |
1424 | }; | |
e3bbff9f | 1425 | printk(KERN_INFO "megasas: FW now in Ready state\n"); |
c4a3e0a5 BS |
1426 | |
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | /** | |
1431 | * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool | |
1432 | * @instance: Adapter soft state | |
1433 | */ | |
1434 | static void megasas_teardown_frame_pool(struct megasas_instance *instance) | |
1435 | { | |
1436 | int i; | |
1437 | u32 max_cmd = instance->max_fw_cmds; | |
1438 | struct megasas_cmd *cmd; | |
1439 | ||
1440 | if (!instance->frame_dma_pool) | |
1441 | return; | |
1442 | ||
1443 | /* | |
1444 | * Return all frames to pool | |
1445 | */ | |
1446 | for (i = 0; i < max_cmd; i++) { | |
1447 | ||
1448 | cmd = instance->cmd_list[i]; | |
1449 | ||
1450 | if (cmd->frame) | |
1451 | pci_pool_free(instance->frame_dma_pool, cmd->frame, | |
1452 | cmd->frame_phys_addr); | |
1453 | ||
1454 | if (cmd->sense) | |
e3bbff9f | 1455 | pci_pool_free(instance->sense_dma_pool, cmd->sense, |
c4a3e0a5 BS |
1456 | cmd->sense_phys_addr); |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * Now destroy the pool itself | |
1461 | */ | |
1462 | pci_pool_destroy(instance->frame_dma_pool); | |
1463 | pci_pool_destroy(instance->sense_dma_pool); | |
1464 | ||
1465 | instance->frame_dma_pool = NULL; | |
1466 | instance->sense_dma_pool = NULL; | |
1467 | } | |
1468 | ||
1469 | /** | |
1470 | * megasas_create_frame_pool - Creates DMA pool for cmd frames | |
1471 | * @instance: Adapter soft state | |
1472 | * | |
1473 | * Each command packet has an embedded DMA memory buffer that is used for | |
1474 | * filling MFI frame and the SG list that immediately follows the frame. This | |
1475 | * function creates those DMA memory buffers for each command packet by using | |
1476 | * PCI pool facility. | |
1477 | */ | |
1478 | static int megasas_create_frame_pool(struct megasas_instance *instance) | |
1479 | { | |
1480 | int i; | |
1481 | u32 max_cmd; | |
1482 | u32 sge_sz; | |
1483 | u32 sgl_sz; | |
1484 | u32 total_sz; | |
1485 | u32 frame_count; | |
1486 | struct megasas_cmd *cmd; | |
1487 | ||
1488 | max_cmd = instance->max_fw_cmds; | |
1489 | ||
1490 | /* | |
1491 | * Size of our frame is 64 bytes for MFI frame, followed by max SG | |
1492 | * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer | |
1493 | */ | |
1494 | sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : | |
1495 | sizeof(struct megasas_sge32); | |
1496 | ||
1497 | /* | |
1498 | * Calculated the number of 64byte frames required for SGL | |
1499 | */ | |
1500 | sgl_sz = sge_sz * instance->max_num_sge; | |
1501 | frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE; | |
1502 | ||
1503 | /* | |
1504 | * We need one extra frame for the MFI command | |
1505 | */ | |
1506 | frame_count++; | |
1507 | ||
1508 | total_sz = MEGAMFI_FRAME_SIZE * frame_count; | |
1509 | /* | |
1510 | * Use DMA pool facility provided by PCI layer | |
1511 | */ | |
1512 | instance->frame_dma_pool = pci_pool_create("megasas frame pool", | |
1513 | instance->pdev, total_sz, 64, | |
1514 | 0); | |
1515 | ||
1516 | if (!instance->frame_dma_pool) { | |
1517 | printk(KERN_DEBUG "megasas: failed to setup frame pool\n"); | |
1518 | return -ENOMEM; | |
1519 | } | |
1520 | ||
1521 | instance->sense_dma_pool = pci_pool_create("megasas sense pool", | |
1522 | instance->pdev, 128, 4, 0); | |
1523 | ||
1524 | if (!instance->sense_dma_pool) { | |
1525 | printk(KERN_DEBUG "megasas: failed to setup sense pool\n"); | |
1526 | ||
1527 | pci_pool_destroy(instance->frame_dma_pool); | |
1528 | instance->frame_dma_pool = NULL; | |
1529 | ||
1530 | return -ENOMEM; | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * Allocate and attach a frame to each of the commands in cmd_list. | |
1535 | * By making cmd->index as the context instead of the &cmd, we can | |
1536 | * always use 32bit context regardless of the architecture | |
1537 | */ | |
1538 | for (i = 0; i < max_cmd; i++) { | |
1539 | ||
1540 | cmd = instance->cmd_list[i]; | |
1541 | ||
1542 | cmd->frame = pci_pool_alloc(instance->frame_dma_pool, | |
1543 | GFP_KERNEL, &cmd->frame_phys_addr); | |
1544 | ||
1545 | cmd->sense = pci_pool_alloc(instance->sense_dma_pool, | |
1546 | GFP_KERNEL, &cmd->sense_phys_addr); | |
1547 | ||
1548 | /* | |
1549 | * megasas_teardown_frame_pool() takes care of freeing | |
1550 | * whatever has been allocated | |
1551 | */ | |
1552 | if (!cmd->frame || !cmd->sense) { | |
1553 | printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n"); | |
1554 | megasas_teardown_frame_pool(instance); | |
1555 | return -ENOMEM; | |
1556 | } | |
1557 | ||
1558 | cmd->frame->io.context = cmd->index; | |
1559 | } | |
1560 | ||
1561 | return 0; | |
1562 | } | |
1563 | ||
1564 | /** | |
1565 | * megasas_free_cmds - Free all the cmds in the free cmd pool | |
1566 | * @instance: Adapter soft state | |
1567 | */ | |
1568 | static void megasas_free_cmds(struct megasas_instance *instance) | |
1569 | { | |
1570 | int i; | |
1571 | /* First free the MFI frame pool */ | |
1572 | megasas_teardown_frame_pool(instance); | |
1573 | ||
1574 | /* Free all the commands in the cmd_list */ | |
1575 | for (i = 0; i < instance->max_fw_cmds; i++) | |
1576 | kfree(instance->cmd_list[i]); | |
1577 | ||
1578 | /* Free the cmd_list buffer itself */ | |
1579 | kfree(instance->cmd_list); | |
1580 | instance->cmd_list = NULL; | |
1581 | ||
1582 | INIT_LIST_HEAD(&instance->cmd_pool); | |
1583 | } | |
1584 | ||
1585 | /** | |
1586 | * megasas_alloc_cmds - Allocates the command packets | |
1587 | * @instance: Adapter soft state | |
1588 | * | |
1589 | * Each command that is issued to the FW, whether IO commands from the OS or | |
1590 | * internal commands like IOCTLs, are wrapped in local data structure called | |
1591 | * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to | |
1592 | * the FW. | |
1593 | * | |
1594 | * Each frame has a 32-bit field called context (tag). This context is used | |
1595 | * to get back the megasas_cmd from the frame when a frame gets completed in | |
1596 | * the ISR. Typically the address of the megasas_cmd itself would be used as | |
1597 | * the context. But we wanted to keep the differences between 32 and 64 bit | |
1598 | * systems to the mininum. We always use 32 bit integers for the context. In | |
1599 | * this driver, the 32 bit values are the indices into an array cmd_list. | |
1600 | * This array is used only to look up the megasas_cmd given the context. The | |
1601 | * free commands themselves are maintained in a linked list called cmd_pool. | |
1602 | */ | |
1603 | static int megasas_alloc_cmds(struct megasas_instance *instance) | |
1604 | { | |
1605 | int i; | |
1606 | int j; | |
1607 | u32 max_cmd; | |
1608 | struct megasas_cmd *cmd; | |
1609 | ||
1610 | max_cmd = instance->max_fw_cmds; | |
1611 | ||
1612 | /* | |
1613 | * instance->cmd_list is an array of struct megasas_cmd pointers. | |
1614 | * Allocate the dynamic array first and then allocate individual | |
1615 | * commands. | |
1616 | */ | |
1617 | instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd, | |
1618 | GFP_KERNEL); | |
1619 | ||
1620 | if (!instance->cmd_list) { | |
1621 | printk(KERN_DEBUG "megasas: out of memory\n"); | |
1622 | return -ENOMEM; | |
1623 | } | |
1624 | ||
1625 | memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd); | |
1626 | ||
1627 | for (i = 0; i < max_cmd; i++) { | |
1628 | instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd), | |
1629 | GFP_KERNEL); | |
1630 | ||
1631 | if (!instance->cmd_list[i]) { | |
1632 | ||
1633 | for (j = 0; j < i; j++) | |
1634 | kfree(instance->cmd_list[j]); | |
1635 | ||
1636 | kfree(instance->cmd_list); | |
1637 | instance->cmd_list = NULL; | |
1638 | ||
1639 | return -ENOMEM; | |
1640 | } | |
1641 | } | |
1642 | ||
1643 | /* | |
1644 | * Add all the commands to command pool (instance->cmd_pool) | |
1645 | */ | |
1646 | for (i = 0; i < max_cmd; i++) { | |
1647 | cmd = instance->cmd_list[i]; | |
1648 | memset(cmd, 0, sizeof(struct megasas_cmd)); | |
1649 | cmd->index = i; | |
1650 | cmd->instance = instance; | |
1651 | ||
1652 | list_add_tail(&cmd->list, &instance->cmd_pool); | |
1653 | } | |
1654 | ||
1655 | /* | |
1656 | * Create a frame pool and assign one frame to each cmd | |
1657 | */ | |
1658 | if (megasas_create_frame_pool(instance)) { | |
1659 | printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n"); | |
1660 | megasas_free_cmds(instance); | |
1661 | } | |
1662 | ||
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | /** | |
1667 | * megasas_get_controller_info - Returns FW's controller structure | |
1668 | * @instance: Adapter soft state | |
1669 | * @ctrl_info: Controller information structure | |
1670 | * | |
1671 | * Issues an internal command (DCMD) to get the FW's controller structure. | |
1672 | * This information is mainly used to find out the maximum IO transfer per | |
1673 | * command supported by the FW. | |
1674 | */ | |
1675 | static int | |
1676 | megasas_get_ctrl_info(struct megasas_instance *instance, | |
1677 | struct megasas_ctrl_info *ctrl_info) | |
1678 | { | |
1679 | int ret = 0; | |
1680 | struct megasas_cmd *cmd; | |
1681 | struct megasas_dcmd_frame *dcmd; | |
1682 | struct megasas_ctrl_info *ci; | |
1683 | dma_addr_t ci_h = 0; | |
1684 | ||
1685 | cmd = megasas_get_cmd(instance); | |
1686 | ||
1687 | if (!cmd) { | |
1688 | printk(KERN_DEBUG "megasas: Failed to get a free cmd\n"); | |
1689 | return -ENOMEM; | |
1690 | } | |
1691 | ||
1692 | dcmd = &cmd->frame->dcmd; | |
1693 | ||
1694 | ci = pci_alloc_consistent(instance->pdev, | |
1695 | sizeof(struct megasas_ctrl_info), &ci_h); | |
1696 | ||
1697 | if (!ci) { | |
1698 | printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n"); | |
1699 | megasas_return_cmd(instance, cmd); | |
1700 | return -ENOMEM; | |
1701 | } | |
1702 | ||
1703 | memset(ci, 0, sizeof(*ci)); | |
1704 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
1705 | ||
1706 | dcmd->cmd = MFI_CMD_DCMD; | |
1707 | dcmd->cmd_status = 0xFF; | |
1708 | dcmd->sge_count = 1; | |
1709 | dcmd->flags = MFI_FRAME_DIR_READ; | |
1710 | dcmd->timeout = 0; | |
1711 | dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info); | |
1712 | dcmd->opcode = MR_DCMD_CTRL_GET_INFO; | |
1713 | dcmd->sgl.sge32[0].phys_addr = ci_h; | |
1714 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info); | |
1715 | ||
1716 | if (!megasas_issue_polled(instance, cmd)) { | |
1717 | ret = 0; | |
1718 | memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info)); | |
1719 | } else { | |
1720 | ret = -1; | |
1721 | } | |
1722 | ||
1723 | pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info), | |
1724 | ci, ci_h); | |
1725 | ||
1726 | megasas_return_cmd(instance, cmd); | |
1727 | return ret; | |
1728 | } | |
1729 | ||
5d018ad0 SP |
1730 | /** |
1731 | * megasas_complete_cmd_dpc - Returns FW's controller structure | |
1732 | * @instance_addr: Address of adapter soft state | |
1733 | * | |
1734 | * Tasklet to complete cmds | |
1735 | */ | |
1736 | void megasas_complete_cmd_dpc(unsigned long instance_addr) | |
1737 | { | |
1738 | u32 producer; | |
1739 | u32 consumer; | |
1740 | u32 context; | |
1741 | struct megasas_cmd *cmd; | |
1742 | struct megasas_instance *instance = (struct megasas_instance *)instance_addr; | |
1743 | ||
1744 | producer = *instance->producer; | |
1745 | consumer = *instance->consumer; | |
1746 | ||
1747 | while (consumer != producer) { | |
1748 | context = instance->reply_queue[consumer]; | |
1749 | ||
1750 | cmd = instance->cmd_list[context]; | |
1751 | ||
1752 | megasas_complete_cmd(instance, cmd, DID_OK); | |
1753 | ||
1754 | consumer++; | |
1755 | if (consumer == (instance->max_fw_cmds + 1)) { | |
1756 | consumer = 0; | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | *instance->consumer = producer; | |
1761 | } | |
1762 | ||
c4a3e0a5 BS |
1763 | /** |
1764 | * megasas_init_mfi - Initializes the FW | |
1765 | * @instance: Adapter soft state | |
1766 | * | |
1767 | * This is the main function for initializing MFI firmware. | |
1768 | */ | |
1769 | static int megasas_init_mfi(struct megasas_instance *instance) | |
1770 | { | |
1771 | u32 context_sz; | |
1772 | u32 reply_q_sz; | |
1773 | u32 max_sectors_1; | |
1774 | u32 max_sectors_2; | |
1775 | struct megasas_register_set __iomem *reg_set; | |
1776 | ||
1777 | struct megasas_cmd *cmd; | |
1778 | struct megasas_ctrl_info *ctrl_info; | |
1779 | ||
1780 | struct megasas_init_frame *init_frame; | |
1781 | struct megasas_init_queue_info *initq_info; | |
1782 | dma_addr_t init_frame_h; | |
1783 | dma_addr_t initq_info_h; | |
1784 | ||
1785 | /* | |
1786 | * Map the message registers | |
1787 | */ | |
1788 | instance->base_addr = pci_resource_start(instance->pdev, 0); | |
1789 | ||
1790 | if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) { | |
1791 | printk(KERN_DEBUG "megasas: IO memory region busy!\n"); | |
1792 | return -EBUSY; | |
1793 | } | |
1794 | ||
1795 | instance->reg_set = ioremap_nocache(instance->base_addr, 8192); | |
1796 | ||
1797 | if (!instance->reg_set) { | |
1798 | printk(KERN_DEBUG "megasas: Failed to map IO mem\n"); | |
1799 | goto fail_ioremap; | |
1800 | } | |
1801 | ||
1802 | reg_set = instance->reg_set; | |
1803 | ||
f9876f0b SP |
1804 | switch(instance->pdev->device) |
1805 | { | |
1806 | case PCI_DEVICE_ID_LSI_SAS1078R: | |
1807 | instance->instancet = &megasas_instance_template_ppc; | |
1808 | break; | |
1809 | case PCI_DEVICE_ID_LSI_SAS1064R: | |
1810 | case PCI_DEVICE_ID_DELL_PERC5: | |
1811 | default: | |
1812 | instance->instancet = &megasas_instance_template_xscale; | |
1813 | break; | |
1814 | } | |
1341c939 | 1815 | |
c4a3e0a5 BS |
1816 | /* |
1817 | * We expect the FW state to be READY | |
1818 | */ | |
1341c939 | 1819 | if (megasas_transition_to_ready(instance)) |
c4a3e0a5 BS |
1820 | goto fail_ready_state; |
1821 | ||
1822 | /* | |
1823 | * Get various operational parameters from status register | |
1824 | */ | |
1341c939 | 1825 | instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF; |
e3bbff9f SP |
1826 | /* |
1827 | * Reduce the max supported cmds by 1. This is to ensure that the | |
1828 | * reply_q_sz (1 more than the max cmd that driver may send) | |
1829 | * does not exceed max cmds that the FW can support | |
1830 | */ | |
1831 | instance->max_fw_cmds = instance->max_fw_cmds-1; | |
1341c939 SP |
1832 | instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >> |
1833 | 0x10; | |
c4a3e0a5 BS |
1834 | /* |
1835 | * Create a pool of commands | |
1836 | */ | |
1837 | if (megasas_alloc_cmds(instance)) | |
1838 | goto fail_alloc_cmds; | |
1839 | ||
1840 | /* | |
1841 | * Allocate memory for reply queue. Length of reply queue should | |
1842 | * be _one_ more than the maximum commands handled by the firmware. | |
1843 | * | |
1844 | * Note: When FW completes commands, it places corresponding contex | |
1845 | * values in this circular reply queue. This circular queue is a fairly | |
1846 | * typical producer-consumer queue. FW is the producer (of completed | |
1847 | * commands) and the driver is the consumer. | |
1848 | */ | |
1849 | context_sz = sizeof(u32); | |
1850 | reply_q_sz = context_sz * (instance->max_fw_cmds + 1); | |
1851 | ||
1852 | instance->reply_queue = pci_alloc_consistent(instance->pdev, | |
1853 | reply_q_sz, | |
1854 | &instance->reply_queue_h); | |
1855 | ||
1856 | if (!instance->reply_queue) { | |
1857 | printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n"); | |
1858 | goto fail_reply_queue; | |
1859 | } | |
1860 | ||
1861 | /* | |
1862 | * Prepare a init frame. Note the init frame points to queue info | |
1863 | * structure. Each frame has SGL allocated after first 64 bytes. For | |
1864 | * this frame - since we don't need any SGL - we use SGL's space as | |
1865 | * queue info structure | |
1866 | * | |
1867 | * We will not get a NULL command below. We just created the pool. | |
1868 | */ | |
1869 | cmd = megasas_get_cmd(instance); | |
1870 | ||
1871 | init_frame = (struct megasas_init_frame *)cmd->frame; | |
1872 | initq_info = (struct megasas_init_queue_info *) | |
1873 | ((unsigned long)init_frame + 64); | |
1874 | ||
1875 | init_frame_h = cmd->frame_phys_addr; | |
1876 | initq_info_h = init_frame_h + 64; | |
1877 | ||
1878 | memset(init_frame, 0, MEGAMFI_FRAME_SIZE); | |
1879 | memset(initq_info, 0, sizeof(struct megasas_init_queue_info)); | |
1880 | ||
1881 | initq_info->reply_queue_entries = instance->max_fw_cmds + 1; | |
1882 | initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h; | |
1883 | ||
1884 | initq_info->producer_index_phys_addr_lo = instance->producer_h; | |
1885 | initq_info->consumer_index_phys_addr_lo = instance->consumer_h; | |
1886 | ||
1887 | init_frame->cmd = MFI_CMD_INIT; | |
1888 | init_frame->cmd_status = 0xFF; | |
1889 | init_frame->queue_info_new_phys_addr_lo = initq_info_h; | |
1890 | ||
1891 | init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info); | |
1892 | ||
0e98936c SP |
1893 | /* |
1894 | * disable the intr before firing the init frame to FW | |
1895 | */ | |
b274cab7 | 1896 | instance->instancet->disable_intr(instance->reg_set); |
0e98936c | 1897 | |
c4a3e0a5 BS |
1898 | /* |
1899 | * Issue the init frame in polled mode | |
1900 | */ | |
1901 | if (megasas_issue_polled(instance, cmd)) { | |
1902 | printk(KERN_DEBUG "megasas: Failed to init firmware\n"); | |
1903 | goto fail_fw_init; | |
1904 | } | |
1905 | ||
1906 | megasas_return_cmd(instance, cmd); | |
1907 | ||
1908 | ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL); | |
1909 | ||
1910 | /* | |
1911 | * Compute the max allowed sectors per IO: The controller info has two | |
1912 | * limits on max sectors. Driver should use the minimum of these two. | |
1913 | * | |
1914 | * 1 << stripe_sz_ops.min = max sectors per strip | |
1915 | * | |
1916 | * Note that older firmwares ( < FW ver 30) didn't report information | |
1917 | * to calculate max_sectors_1. So the number ended up as zero always. | |
1918 | */ | |
1919 | if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) { | |
1920 | ||
1921 | max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) * | |
1922 | ctrl_info->max_strips_per_io; | |
1923 | max_sectors_2 = ctrl_info->max_request_size; | |
1924 | ||
1925 | instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2) | |
1926 | ? max_sectors_1 : max_sectors_2; | |
1927 | } else | |
1928 | instance->max_sectors_per_req = instance->max_num_sge * | |
1929 | PAGE_SIZE / 512; | |
1930 | ||
1931 | kfree(ctrl_info); | |
1932 | ||
5d018ad0 SP |
1933 | /* |
1934 | * Setup tasklet for cmd completion | |
1935 | */ | |
1936 | ||
1937 | tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc, | |
1938 | (unsigned long)instance); | |
c4a3e0a5 BS |
1939 | return 0; |
1940 | ||
1941 | fail_fw_init: | |
1942 | megasas_return_cmd(instance, cmd); | |
1943 | ||
1944 | pci_free_consistent(instance->pdev, reply_q_sz, | |
1945 | instance->reply_queue, instance->reply_queue_h); | |
1946 | fail_reply_queue: | |
1947 | megasas_free_cmds(instance); | |
1948 | ||
1949 | fail_alloc_cmds: | |
1950 | fail_ready_state: | |
1951 | iounmap(instance->reg_set); | |
1952 | ||
1953 | fail_ioremap: | |
1954 | pci_release_regions(instance->pdev); | |
1955 | ||
1956 | return -EINVAL; | |
1957 | } | |
1958 | ||
1959 | /** | |
1960 | * megasas_release_mfi - Reverses the FW initialization | |
1961 | * @intance: Adapter soft state | |
1962 | */ | |
1963 | static void megasas_release_mfi(struct megasas_instance *instance) | |
1964 | { | |
1965 | u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1); | |
1966 | ||
1967 | pci_free_consistent(instance->pdev, reply_q_sz, | |
1968 | instance->reply_queue, instance->reply_queue_h); | |
1969 | ||
1970 | megasas_free_cmds(instance); | |
1971 | ||
1972 | iounmap(instance->reg_set); | |
1973 | ||
1974 | pci_release_regions(instance->pdev); | |
1975 | } | |
1976 | ||
1977 | /** | |
1978 | * megasas_get_seq_num - Gets latest event sequence numbers | |
1979 | * @instance: Adapter soft state | |
1980 | * @eli: FW event log sequence numbers information | |
1981 | * | |
1982 | * FW maintains a log of all events in a non-volatile area. Upper layers would | |
1983 | * usually find out the latest sequence number of the events, the seq number at | |
1984 | * the boot etc. They would "read" all the events below the latest seq number | |
1985 | * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq | |
1986 | * number), they would subsribe to AEN (asynchronous event notification) and | |
1987 | * wait for the events to happen. | |
1988 | */ | |
1989 | static int | |
1990 | megasas_get_seq_num(struct megasas_instance *instance, | |
1991 | struct megasas_evt_log_info *eli) | |
1992 | { | |
1993 | struct megasas_cmd *cmd; | |
1994 | struct megasas_dcmd_frame *dcmd; | |
1995 | struct megasas_evt_log_info *el_info; | |
1996 | dma_addr_t el_info_h = 0; | |
1997 | ||
1998 | cmd = megasas_get_cmd(instance); | |
1999 | ||
2000 | if (!cmd) { | |
2001 | return -ENOMEM; | |
2002 | } | |
2003 | ||
2004 | dcmd = &cmd->frame->dcmd; | |
2005 | el_info = pci_alloc_consistent(instance->pdev, | |
2006 | sizeof(struct megasas_evt_log_info), | |
2007 | &el_info_h); | |
2008 | ||
2009 | if (!el_info) { | |
2010 | megasas_return_cmd(instance, cmd); | |
2011 | return -ENOMEM; | |
2012 | } | |
2013 | ||
2014 | memset(el_info, 0, sizeof(*el_info)); | |
2015 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2016 | ||
2017 | dcmd->cmd = MFI_CMD_DCMD; | |
2018 | dcmd->cmd_status = 0x0; | |
2019 | dcmd->sge_count = 1; | |
2020 | dcmd->flags = MFI_FRAME_DIR_READ; | |
2021 | dcmd->timeout = 0; | |
2022 | dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info); | |
2023 | dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO; | |
2024 | dcmd->sgl.sge32[0].phys_addr = el_info_h; | |
2025 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info); | |
2026 | ||
2027 | megasas_issue_blocked_cmd(instance, cmd); | |
2028 | ||
2029 | /* | |
2030 | * Copy the data back into callers buffer | |
2031 | */ | |
2032 | memcpy(eli, el_info, sizeof(struct megasas_evt_log_info)); | |
2033 | ||
2034 | pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info), | |
2035 | el_info, el_info_h); | |
2036 | ||
2037 | megasas_return_cmd(instance, cmd); | |
2038 | ||
2039 | return 0; | |
2040 | } | |
2041 | ||
2042 | /** | |
2043 | * megasas_register_aen - Registers for asynchronous event notification | |
2044 | * @instance: Adapter soft state | |
2045 | * @seq_num: The starting sequence number | |
2046 | * @class_locale: Class of the event | |
2047 | * | |
2048 | * This function subscribes for AEN for events beyond the @seq_num. It requests | |
2049 | * to be notified if and only if the event is of type @class_locale | |
2050 | */ | |
2051 | static int | |
2052 | megasas_register_aen(struct megasas_instance *instance, u32 seq_num, | |
2053 | u32 class_locale_word) | |
2054 | { | |
2055 | int ret_val; | |
2056 | struct megasas_cmd *cmd; | |
2057 | struct megasas_dcmd_frame *dcmd; | |
2058 | union megasas_evt_class_locale curr_aen; | |
2059 | union megasas_evt_class_locale prev_aen; | |
2060 | ||
2061 | /* | |
2062 | * If there an AEN pending already (aen_cmd), check if the | |
2063 | * class_locale of that pending AEN is inclusive of the new | |
2064 | * AEN request we currently have. If it is, then we don't have | |
2065 | * to do anything. In other words, whichever events the current | |
2066 | * AEN request is subscribing to, have already been subscribed | |
2067 | * to. | |
2068 | * | |
2069 | * If the old_cmd is _not_ inclusive, then we have to abort | |
2070 | * that command, form a class_locale that is superset of both | |
2071 | * old and current and re-issue to the FW | |
2072 | */ | |
2073 | ||
2074 | curr_aen.word = class_locale_word; | |
2075 | ||
2076 | if (instance->aen_cmd) { | |
2077 | ||
2078 | prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1]; | |
2079 | ||
2080 | /* | |
2081 | * A class whose enum value is smaller is inclusive of all | |
2082 | * higher values. If a PROGRESS (= -1) was previously | |
2083 | * registered, then a new registration requests for higher | |
2084 | * classes need not be sent to FW. They are automatically | |
2085 | * included. | |
2086 | * | |
2087 | * Locale numbers don't have such hierarchy. They are bitmap | |
2088 | * values | |
2089 | */ | |
2090 | if ((prev_aen.members.class <= curr_aen.members.class) && | |
2091 | !((prev_aen.members.locale & curr_aen.members.locale) ^ | |
2092 | curr_aen.members.locale)) { | |
2093 | /* | |
2094 | * Previously issued event registration includes | |
2095 | * current request. Nothing to do. | |
2096 | */ | |
2097 | return 0; | |
2098 | } else { | |
2099 | curr_aen.members.locale |= prev_aen.members.locale; | |
2100 | ||
2101 | if (prev_aen.members.class < curr_aen.members.class) | |
2102 | curr_aen.members.class = prev_aen.members.class; | |
2103 | ||
2104 | instance->aen_cmd->abort_aen = 1; | |
2105 | ret_val = megasas_issue_blocked_abort_cmd(instance, | |
2106 | instance-> | |
2107 | aen_cmd); | |
2108 | ||
2109 | if (ret_val) { | |
2110 | printk(KERN_DEBUG "megasas: Failed to abort " | |
2111 | "previous AEN command\n"); | |
2112 | return ret_val; | |
2113 | } | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | cmd = megasas_get_cmd(instance); | |
2118 | ||
2119 | if (!cmd) | |
2120 | return -ENOMEM; | |
2121 | ||
2122 | dcmd = &cmd->frame->dcmd; | |
2123 | ||
2124 | memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail)); | |
2125 | ||
2126 | /* | |
2127 | * Prepare DCMD for aen registration | |
2128 | */ | |
2129 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2130 | ||
2131 | dcmd->cmd = MFI_CMD_DCMD; | |
2132 | dcmd->cmd_status = 0x0; | |
2133 | dcmd->sge_count = 1; | |
2134 | dcmd->flags = MFI_FRAME_DIR_READ; | |
2135 | dcmd->timeout = 0; | |
2136 | dcmd->data_xfer_len = sizeof(struct megasas_evt_detail); | |
2137 | dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT; | |
2138 | dcmd->mbox.w[0] = seq_num; | |
2139 | dcmd->mbox.w[1] = curr_aen.word; | |
2140 | dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h; | |
2141 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail); | |
2142 | ||
2143 | /* | |
2144 | * Store reference to the cmd used to register for AEN. When an | |
2145 | * application wants us to register for AEN, we have to abort this | |
2146 | * cmd and re-register with a new EVENT LOCALE supplied by that app | |
2147 | */ | |
2148 | instance->aen_cmd = cmd; | |
2149 | ||
2150 | /* | |
2151 | * Issue the aen registration frame | |
2152 | */ | |
1341c939 | 2153 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
c4a3e0a5 BS |
2154 | |
2155 | return 0; | |
2156 | } | |
2157 | ||
2158 | /** | |
2159 | * megasas_start_aen - Subscribes to AEN during driver load time | |
2160 | * @instance: Adapter soft state | |
2161 | */ | |
2162 | static int megasas_start_aen(struct megasas_instance *instance) | |
2163 | { | |
2164 | struct megasas_evt_log_info eli; | |
2165 | union megasas_evt_class_locale class_locale; | |
2166 | ||
2167 | /* | |
2168 | * Get the latest sequence number from FW | |
2169 | */ | |
2170 | memset(&eli, 0, sizeof(eli)); | |
2171 | ||
2172 | if (megasas_get_seq_num(instance, &eli)) | |
2173 | return -1; | |
2174 | ||
2175 | /* | |
2176 | * Register AEN with FW for latest sequence number plus 1 | |
2177 | */ | |
2178 | class_locale.members.reserved = 0; | |
2179 | class_locale.members.locale = MR_EVT_LOCALE_ALL; | |
2180 | class_locale.members.class = MR_EVT_CLASS_DEBUG; | |
2181 | ||
2182 | return megasas_register_aen(instance, eli.newest_seq_num + 1, | |
2183 | class_locale.word); | |
2184 | } | |
2185 | ||
2186 | /** | |
2187 | * megasas_io_attach - Attaches this driver to SCSI mid-layer | |
2188 | * @instance: Adapter soft state | |
2189 | */ | |
2190 | static int megasas_io_attach(struct megasas_instance *instance) | |
2191 | { | |
2192 | struct Scsi_Host *host = instance->host; | |
2193 | ||
2194 | /* | |
2195 | * Export parameters required by SCSI mid-layer | |
2196 | */ | |
2197 | host->irq = instance->pdev->irq; | |
2198 | host->unique_id = instance->unique_id; | |
2199 | host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS; | |
2200 | host->this_id = instance->init_id; | |
2201 | host->sg_tablesize = instance->max_num_sge; | |
2202 | host->max_sectors = instance->max_sectors_per_req; | |
2203 | host->cmd_per_lun = 128; | |
2204 | host->max_channel = MEGASAS_MAX_CHANNELS - 1; | |
2205 | host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL; | |
2206 | host->max_lun = MEGASAS_MAX_LUN; | |
122da302 | 2207 | host->max_cmd_len = 16; |
c4a3e0a5 BS |
2208 | |
2209 | /* | |
2210 | * Notify the mid-layer about the new controller | |
2211 | */ | |
2212 | if (scsi_add_host(host, &instance->pdev->dev)) { | |
2213 | printk(KERN_DEBUG "megasas: scsi_add_host failed\n"); | |
2214 | return -ENODEV; | |
2215 | } | |
2216 | ||
2217 | /* | |
2218 | * Trigger SCSI to scan our drives | |
2219 | */ | |
2220 | scsi_scan_host(host); | |
2221 | return 0; | |
2222 | } | |
2223 | ||
2224 | /** | |
2225 | * megasas_probe_one - PCI hotplug entry point | |
2226 | * @pdev: PCI device structure | |
2227 | * @id: PCI ids of supported hotplugged adapter | |
2228 | */ | |
2229 | static int __devinit | |
2230 | megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) | |
2231 | { | |
2232 | int rval; | |
2233 | struct Scsi_Host *host; | |
2234 | struct megasas_instance *instance; | |
2235 | ||
2236 | /* | |
2237 | * Announce PCI information | |
2238 | */ | |
2239 | printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", | |
2240 | pdev->vendor, pdev->device, pdev->subsystem_vendor, | |
2241 | pdev->subsystem_device); | |
2242 | ||
2243 | printk("bus %d:slot %d:func %d\n", | |
2244 | pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); | |
2245 | ||
2246 | /* | |
2247 | * PCI prepping: enable device set bus mastering and dma mask | |
2248 | */ | |
2249 | rval = pci_enable_device(pdev); | |
2250 | ||
2251 | if (rval) { | |
2252 | return rval; | |
2253 | } | |
2254 | ||
2255 | pci_set_master(pdev); | |
2256 | ||
2257 | /* | |
2258 | * All our contollers are capable of performing 64-bit DMA | |
2259 | */ | |
2260 | if (IS_DMA64) { | |
2261 | if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) { | |
2262 | ||
2263 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) | |
2264 | goto fail_set_dma_mask; | |
2265 | } | |
2266 | } else { | |
2267 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) | |
2268 | goto fail_set_dma_mask; | |
2269 | } | |
2270 | ||
2271 | host = scsi_host_alloc(&megasas_template, | |
2272 | sizeof(struct megasas_instance)); | |
2273 | ||
2274 | if (!host) { | |
2275 | printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n"); | |
2276 | goto fail_alloc_instance; | |
2277 | } | |
2278 | ||
2279 | instance = (struct megasas_instance *)host->hostdata; | |
2280 | memset(instance, 0, sizeof(*instance)); | |
2281 | ||
2282 | instance->producer = pci_alloc_consistent(pdev, sizeof(u32), | |
2283 | &instance->producer_h); | |
2284 | instance->consumer = pci_alloc_consistent(pdev, sizeof(u32), | |
2285 | &instance->consumer_h); | |
2286 | ||
2287 | if (!instance->producer || !instance->consumer) { | |
2288 | printk(KERN_DEBUG "megasas: Failed to allocate memory for " | |
2289 | "producer, consumer\n"); | |
2290 | goto fail_alloc_dma_buf; | |
2291 | } | |
2292 | ||
2293 | *instance->producer = 0; | |
2294 | *instance->consumer = 0; | |
2295 | ||
2296 | instance->evt_detail = pci_alloc_consistent(pdev, | |
2297 | sizeof(struct | |
2298 | megasas_evt_detail), | |
2299 | &instance->evt_detail_h); | |
2300 | ||
2301 | if (!instance->evt_detail) { | |
2302 | printk(KERN_DEBUG "megasas: Failed to allocate memory for " | |
2303 | "event detail structure\n"); | |
2304 | goto fail_alloc_dma_buf; | |
2305 | } | |
2306 | ||
2307 | /* | |
2308 | * Initialize locks and queues | |
2309 | */ | |
2310 | INIT_LIST_HEAD(&instance->cmd_pool); | |
2311 | ||
e4a082c7 SP |
2312 | atomic_set(&instance->fw_outstanding,0); |
2313 | ||
c4a3e0a5 BS |
2314 | init_waitqueue_head(&instance->int_cmd_wait_q); |
2315 | init_waitqueue_head(&instance->abort_cmd_wait_q); | |
2316 | ||
2317 | spin_lock_init(&instance->cmd_pool_lock); | |
c4a3e0a5 BS |
2318 | |
2319 | sema_init(&instance->aen_mutex, 1); | |
2320 | sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS); | |
2321 | ||
2322 | /* | |
2323 | * Initialize PCI related and misc parameters | |
2324 | */ | |
2325 | instance->pdev = pdev; | |
2326 | instance->host = host; | |
2327 | instance->unique_id = pdev->bus->number << 8 | pdev->devfn; | |
2328 | instance->init_id = MEGASAS_DEFAULT_INIT_ID; | |
2329 | ||
658dcedb SP |
2330 | megasas_dbg_lvl = 0; |
2331 | ||
c4a3e0a5 BS |
2332 | /* |
2333 | * Initialize MFI Firmware | |
2334 | */ | |
2335 | if (megasas_init_mfi(instance)) | |
2336 | goto fail_init_mfi; | |
2337 | ||
2338 | /* | |
2339 | * Register IRQ | |
2340 | */ | |
1d6f359a | 2341 | if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED, "megasas", instance)) { |
c4a3e0a5 BS |
2342 | printk(KERN_DEBUG "megasas: Failed to register IRQ\n"); |
2343 | goto fail_irq; | |
2344 | } | |
2345 | ||
1341c939 | 2346 | instance->instancet->enable_intr(instance->reg_set); |
c4a3e0a5 BS |
2347 | |
2348 | /* | |
2349 | * Store instance in PCI softstate | |
2350 | */ | |
2351 | pci_set_drvdata(pdev, instance); | |
2352 | ||
2353 | /* | |
2354 | * Add this controller to megasas_mgmt_info structure so that it | |
2355 | * can be exported to management applications | |
2356 | */ | |
2357 | megasas_mgmt_info.count++; | |
2358 | megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance; | |
2359 | megasas_mgmt_info.max_index++; | |
2360 | ||
2361 | /* | |
2362 | * Initiate AEN (Asynchronous Event Notification) | |
2363 | */ | |
2364 | if (megasas_start_aen(instance)) { | |
2365 | printk(KERN_DEBUG "megasas: start aen failed\n"); | |
2366 | goto fail_start_aen; | |
2367 | } | |
2368 | ||
2369 | /* | |
2370 | * Register with SCSI mid-layer | |
2371 | */ | |
2372 | if (megasas_io_attach(instance)) | |
2373 | goto fail_io_attach; | |
2374 | ||
2375 | return 0; | |
2376 | ||
2377 | fail_start_aen: | |
2378 | fail_io_attach: | |
2379 | megasas_mgmt_info.count--; | |
2380 | megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL; | |
2381 | megasas_mgmt_info.max_index--; | |
2382 | ||
2383 | pci_set_drvdata(pdev, NULL); | |
b274cab7 | 2384 | instance->instancet->disable_intr(instance->reg_set); |
c4a3e0a5 BS |
2385 | free_irq(instance->pdev->irq, instance); |
2386 | ||
2387 | megasas_release_mfi(instance); | |
2388 | ||
2389 | fail_irq: | |
2390 | fail_init_mfi: | |
2391 | fail_alloc_dma_buf: | |
2392 | if (instance->evt_detail) | |
2393 | pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), | |
2394 | instance->evt_detail, | |
2395 | instance->evt_detail_h); | |
2396 | ||
2397 | if (instance->producer) | |
2398 | pci_free_consistent(pdev, sizeof(u32), instance->producer, | |
2399 | instance->producer_h); | |
2400 | if (instance->consumer) | |
2401 | pci_free_consistent(pdev, sizeof(u32), instance->consumer, | |
2402 | instance->consumer_h); | |
2403 | scsi_host_put(host); | |
2404 | ||
2405 | fail_alloc_instance: | |
2406 | fail_set_dma_mask: | |
2407 | pci_disable_device(pdev); | |
2408 | ||
2409 | return -ENODEV; | |
2410 | } | |
2411 | ||
2412 | /** | |
2413 | * megasas_flush_cache - Requests FW to flush all its caches | |
2414 | * @instance: Adapter soft state | |
2415 | */ | |
2416 | static void megasas_flush_cache(struct megasas_instance *instance) | |
2417 | { | |
2418 | struct megasas_cmd *cmd; | |
2419 | struct megasas_dcmd_frame *dcmd; | |
2420 | ||
2421 | cmd = megasas_get_cmd(instance); | |
2422 | ||
2423 | if (!cmd) | |
2424 | return; | |
2425 | ||
2426 | dcmd = &cmd->frame->dcmd; | |
2427 | ||
2428 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2429 | ||
2430 | dcmd->cmd = MFI_CMD_DCMD; | |
2431 | dcmd->cmd_status = 0x0; | |
2432 | dcmd->sge_count = 0; | |
2433 | dcmd->flags = MFI_FRAME_DIR_NONE; | |
2434 | dcmd->timeout = 0; | |
2435 | dcmd->data_xfer_len = 0; | |
2436 | dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH; | |
2437 | dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE; | |
2438 | ||
2439 | megasas_issue_blocked_cmd(instance, cmd); | |
2440 | ||
2441 | megasas_return_cmd(instance, cmd); | |
2442 | ||
2443 | return; | |
2444 | } | |
2445 | ||
2446 | /** | |
2447 | * megasas_shutdown_controller - Instructs FW to shutdown the controller | |
2448 | * @instance: Adapter soft state | |
2449 | */ | |
2450 | static void megasas_shutdown_controller(struct megasas_instance *instance) | |
2451 | { | |
2452 | struct megasas_cmd *cmd; | |
2453 | struct megasas_dcmd_frame *dcmd; | |
2454 | ||
2455 | cmd = megasas_get_cmd(instance); | |
2456 | ||
2457 | if (!cmd) | |
2458 | return; | |
2459 | ||
2460 | if (instance->aen_cmd) | |
2461 | megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd); | |
2462 | ||
2463 | dcmd = &cmd->frame->dcmd; | |
2464 | ||
2465 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2466 | ||
2467 | dcmd->cmd = MFI_CMD_DCMD; | |
2468 | dcmd->cmd_status = 0x0; | |
2469 | dcmd->sge_count = 0; | |
2470 | dcmd->flags = MFI_FRAME_DIR_NONE; | |
2471 | dcmd->timeout = 0; | |
2472 | dcmd->data_xfer_len = 0; | |
2473 | dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN; | |
2474 | ||
2475 | megasas_issue_blocked_cmd(instance, cmd); | |
2476 | ||
2477 | megasas_return_cmd(instance, cmd); | |
2478 | ||
2479 | return; | |
2480 | } | |
2481 | ||
2482 | /** | |
2483 | * megasas_detach_one - PCI hot"un"plug entry point | |
2484 | * @pdev: PCI device structure | |
2485 | */ | |
2486 | static void megasas_detach_one(struct pci_dev *pdev) | |
2487 | { | |
2488 | int i; | |
2489 | struct Scsi_Host *host; | |
2490 | struct megasas_instance *instance; | |
2491 | ||
2492 | instance = pci_get_drvdata(pdev); | |
2493 | host = instance->host; | |
2494 | ||
2495 | scsi_remove_host(instance->host); | |
2496 | megasas_flush_cache(instance); | |
2497 | megasas_shutdown_controller(instance); | |
5d018ad0 | 2498 | tasklet_kill(&instance->isr_tasklet); |
c4a3e0a5 BS |
2499 | |
2500 | /* | |
2501 | * Take the instance off the instance array. Note that we will not | |
2502 | * decrement the max_index. We let this array be sparse array | |
2503 | */ | |
2504 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { | |
2505 | if (megasas_mgmt_info.instance[i] == instance) { | |
2506 | megasas_mgmt_info.count--; | |
2507 | megasas_mgmt_info.instance[i] = NULL; | |
2508 | ||
2509 | break; | |
2510 | } | |
2511 | } | |
2512 | ||
2513 | pci_set_drvdata(instance->pdev, NULL); | |
2514 | ||
b274cab7 | 2515 | instance->instancet->disable_intr(instance->reg_set); |
c4a3e0a5 BS |
2516 | |
2517 | free_irq(instance->pdev->irq, instance); | |
2518 | ||
2519 | megasas_release_mfi(instance); | |
2520 | ||
2521 | pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), | |
2522 | instance->evt_detail, instance->evt_detail_h); | |
2523 | ||
2524 | pci_free_consistent(pdev, sizeof(u32), instance->producer, | |
2525 | instance->producer_h); | |
2526 | ||
2527 | pci_free_consistent(pdev, sizeof(u32), instance->consumer, | |
2528 | instance->consumer_h); | |
2529 | ||
2530 | scsi_host_put(host); | |
2531 | ||
2532 | pci_set_drvdata(pdev, NULL); | |
2533 | ||
2534 | pci_disable_device(pdev); | |
2535 | ||
2536 | return; | |
2537 | } | |
2538 | ||
2539 | /** | |
2540 | * megasas_shutdown - Shutdown entry point | |
2541 | * @device: Generic device structure | |
2542 | */ | |
2543 | static void megasas_shutdown(struct pci_dev *pdev) | |
2544 | { | |
2545 | struct megasas_instance *instance = pci_get_drvdata(pdev); | |
2546 | megasas_flush_cache(instance); | |
2547 | } | |
2548 | ||
2549 | /** | |
2550 | * megasas_mgmt_open - char node "open" entry point | |
2551 | */ | |
2552 | static int megasas_mgmt_open(struct inode *inode, struct file *filep) | |
2553 | { | |
2554 | /* | |
2555 | * Allow only those users with admin rights | |
2556 | */ | |
2557 | if (!capable(CAP_SYS_ADMIN)) | |
2558 | return -EACCES; | |
2559 | ||
2560 | return 0; | |
2561 | } | |
2562 | ||
2563 | /** | |
2564 | * megasas_mgmt_release - char node "release" entry point | |
2565 | */ | |
2566 | static int megasas_mgmt_release(struct inode *inode, struct file *filep) | |
2567 | { | |
2568 | filep->private_data = NULL; | |
2569 | fasync_helper(-1, filep, 0, &megasas_async_queue); | |
2570 | ||
2571 | return 0; | |
2572 | } | |
2573 | ||
2574 | /** | |
2575 | * megasas_mgmt_fasync - Async notifier registration from applications | |
2576 | * | |
2577 | * This function adds the calling process to a driver global queue. When an | |
2578 | * event occurs, SIGIO will be sent to all processes in this queue. | |
2579 | */ | |
2580 | static int megasas_mgmt_fasync(int fd, struct file *filep, int mode) | |
2581 | { | |
2582 | int rc; | |
2583 | ||
0b950672 | 2584 | mutex_lock(&megasas_async_queue_mutex); |
c4a3e0a5 BS |
2585 | |
2586 | rc = fasync_helper(fd, filep, mode, &megasas_async_queue); | |
2587 | ||
0b950672 | 2588 | mutex_unlock(&megasas_async_queue_mutex); |
c4a3e0a5 BS |
2589 | |
2590 | if (rc >= 0) { | |
2591 | /* For sanity check when we get ioctl */ | |
2592 | filep->private_data = filep; | |
2593 | return 0; | |
2594 | } | |
2595 | ||
2596 | printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc); | |
2597 | ||
2598 | return rc; | |
2599 | } | |
2600 | ||
2601 | /** | |
2602 | * megasas_mgmt_fw_ioctl - Issues management ioctls to FW | |
2603 | * @instance: Adapter soft state | |
2604 | * @argp: User's ioctl packet | |
2605 | */ | |
2606 | static int | |
2607 | megasas_mgmt_fw_ioctl(struct megasas_instance *instance, | |
2608 | struct megasas_iocpacket __user * user_ioc, | |
2609 | struct megasas_iocpacket *ioc) | |
2610 | { | |
2611 | struct megasas_sge32 *kern_sge32; | |
2612 | struct megasas_cmd *cmd; | |
2613 | void *kbuff_arr[MAX_IOCTL_SGE]; | |
2614 | dma_addr_t buf_handle = 0; | |
2615 | int error = 0, i; | |
2616 | void *sense = NULL; | |
2617 | dma_addr_t sense_handle; | |
2618 | u32 *sense_ptr; | |
2619 | ||
2620 | memset(kbuff_arr, 0, sizeof(kbuff_arr)); | |
2621 | ||
2622 | if (ioc->sge_count > MAX_IOCTL_SGE) { | |
2623 | printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n", | |
2624 | ioc->sge_count, MAX_IOCTL_SGE); | |
2625 | return -EINVAL; | |
2626 | } | |
2627 | ||
2628 | cmd = megasas_get_cmd(instance); | |
2629 | if (!cmd) { | |
2630 | printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n"); | |
2631 | return -ENOMEM; | |
2632 | } | |
2633 | ||
2634 | /* | |
2635 | * User's IOCTL packet has 2 frames (maximum). Copy those two | |
2636 | * frames into our cmd's frames. cmd->frame's context will get | |
2637 | * overwritten when we copy from user's frames. So set that value | |
2638 | * alone separately | |
2639 | */ | |
2640 | memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE); | |
2641 | cmd->frame->hdr.context = cmd->index; | |
2642 | ||
2643 | /* | |
2644 | * The management interface between applications and the fw uses | |
2645 | * MFI frames. E.g, RAID configuration changes, LD property changes | |
2646 | * etc are accomplishes through different kinds of MFI frames. The | |
2647 | * driver needs to care only about substituting user buffers with | |
2648 | * kernel buffers in SGLs. The location of SGL is embedded in the | |
2649 | * struct iocpacket itself. | |
2650 | */ | |
2651 | kern_sge32 = (struct megasas_sge32 *) | |
2652 | ((unsigned long)cmd->frame + ioc->sgl_off); | |
2653 | ||
2654 | /* | |
2655 | * For each user buffer, create a mirror buffer and copy in | |
2656 | */ | |
2657 | for (i = 0; i < ioc->sge_count; i++) { | |
2658 | kbuff_arr[i] = pci_alloc_consistent(instance->pdev, | |
2659 | ioc->sgl[i].iov_len, | |
2660 | &buf_handle); | |
2661 | if (!kbuff_arr[i]) { | |
2662 | printk(KERN_DEBUG "megasas: Failed to alloc " | |
2663 | "kernel SGL buffer for IOCTL \n"); | |
2664 | error = -ENOMEM; | |
2665 | goto out; | |
2666 | } | |
2667 | ||
2668 | /* | |
2669 | * We don't change the dma_coherent_mask, so | |
2670 | * pci_alloc_consistent only returns 32bit addresses | |
2671 | */ | |
2672 | kern_sge32[i].phys_addr = (u32) buf_handle; | |
2673 | kern_sge32[i].length = ioc->sgl[i].iov_len; | |
2674 | ||
2675 | /* | |
2676 | * We created a kernel buffer corresponding to the | |
2677 | * user buffer. Now copy in from the user buffer | |
2678 | */ | |
2679 | if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base, | |
2680 | (u32) (ioc->sgl[i].iov_len))) { | |
2681 | error = -EFAULT; | |
2682 | goto out; | |
2683 | } | |
2684 | } | |
2685 | ||
2686 | if (ioc->sense_len) { | |
2687 | sense = pci_alloc_consistent(instance->pdev, ioc->sense_len, | |
2688 | &sense_handle); | |
2689 | if (!sense) { | |
2690 | error = -ENOMEM; | |
2691 | goto out; | |
2692 | } | |
2693 | ||
2694 | sense_ptr = | |
2695 | (u32 *) ((unsigned long)cmd->frame + ioc->sense_off); | |
2696 | *sense_ptr = sense_handle; | |
2697 | } | |
2698 | ||
2699 | /* | |
2700 | * Set the sync_cmd flag so that the ISR knows not to complete this | |
2701 | * cmd to the SCSI mid-layer | |
2702 | */ | |
2703 | cmd->sync_cmd = 1; | |
2704 | megasas_issue_blocked_cmd(instance, cmd); | |
2705 | cmd->sync_cmd = 0; | |
2706 | ||
2707 | /* | |
2708 | * copy out the kernel buffers to user buffers | |
2709 | */ | |
2710 | for (i = 0; i < ioc->sge_count; i++) { | |
2711 | if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i], | |
2712 | ioc->sgl[i].iov_len)) { | |
2713 | error = -EFAULT; | |
2714 | goto out; | |
2715 | } | |
2716 | } | |
2717 | ||
2718 | /* | |
2719 | * copy out the sense | |
2720 | */ | |
2721 | if (ioc->sense_len) { | |
2722 | /* | |
2723 | * sense_ptr points to the location that has the user | |
2724 | * sense buffer address | |
2725 | */ | |
2726 | sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw + | |
2727 | ioc->sense_off); | |
2728 | ||
2729 | if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)), | |
2730 | sense, ioc->sense_len)) { | |
2731 | error = -EFAULT; | |
2732 | goto out; | |
2733 | } | |
2734 | } | |
2735 | ||
2736 | /* | |
2737 | * copy the status codes returned by the fw | |
2738 | */ | |
2739 | if (copy_to_user(&user_ioc->frame.hdr.cmd_status, | |
2740 | &cmd->frame->hdr.cmd_status, sizeof(u8))) { | |
2741 | printk(KERN_DEBUG "megasas: Error copying out cmd_status\n"); | |
2742 | error = -EFAULT; | |
2743 | } | |
2744 | ||
2745 | out: | |
2746 | if (sense) { | |
2747 | pci_free_consistent(instance->pdev, ioc->sense_len, | |
2748 | sense, sense_handle); | |
2749 | } | |
2750 | ||
2751 | for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) { | |
2752 | pci_free_consistent(instance->pdev, | |
2753 | kern_sge32[i].length, | |
2754 | kbuff_arr[i], kern_sge32[i].phys_addr); | |
2755 | } | |
2756 | ||
2757 | megasas_return_cmd(instance, cmd); | |
2758 | return error; | |
2759 | } | |
2760 | ||
2761 | static struct megasas_instance *megasas_lookup_instance(u16 host_no) | |
2762 | { | |
2763 | int i; | |
2764 | ||
2765 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { | |
2766 | ||
2767 | if ((megasas_mgmt_info.instance[i]) && | |
2768 | (megasas_mgmt_info.instance[i]->host->host_no == host_no)) | |
2769 | return megasas_mgmt_info.instance[i]; | |
2770 | } | |
2771 | ||
2772 | return NULL; | |
2773 | } | |
2774 | ||
2775 | static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg) | |
2776 | { | |
2777 | struct megasas_iocpacket __user *user_ioc = | |
2778 | (struct megasas_iocpacket __user *)arg; | |
2779 | struct megasas_iocpacket *ioc; | |
2780 | struct megasas_instance *instance; | |
2781 | int error; | |
2782 | ||
2783 | ioc = kmalloc(sizeof(*ioc), GFP_KERNEL); | |
2784 | if (!ioc) | |
2785 | return -ENOMEM; | |
2786 | ||
2787 | if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) { | |
2788 | error = -EFAULT; | |
2789 | goto out_kfree_ioc; | |
2790 | } | |
2791 | ||
2792 | instance = megasas_lookup_instance(ioc->host_no); | |
2793 | if (!instance) { | |
2794 | error = -ENODEV; | |
2795 | goto out_kfree_ioc; | |
2796 | } | |
2797 | ||
2798 | /* | |
2799 | * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds | |
2800 | */ | |
2801 | if (down_interruptible(&instance->ioctl_sem)) { | |
2802 | error = -ERESTARTSYS; | |
2803 | goto out_kfree_ioc; | |
2804 | } | |
2805 | error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc); | |
2806 | up(&instance->ioctl_sem); | |
2807 | ||
2808 | out_kfree_ioc: | |
2809 | kfree(ioc); | |
2810 | return error; | |
2811 | } | |
2812 | ||
2813 | static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg) | |
2814 | { | |
2815 | struct megasas_instance *instance; | |
2816 | struct megasas_aen aen; | |
2817 | int error; | |
2818 | ||
2819 | if (file->private_data != file) { | |
2820 | printk(KERN_DEBUG "megasas: fasync_helper was not " | |
2821 | "called first\n"); | |
2822 | return -EINVAL; | |
2823 | } | |
2824 | ||
2825 | if (copy_from_user(&aen, (void __user *)arg, sizeof(aen))) | |
2826 | return -EFAULT; | |
2827 | ||
2828 | instance = megasas_lookup_instance(aen.host_no); | |
2829 | ||
2830 | if (!instance) | |
2831 | return -ENODEV; | |
2832 | ||
2833 | down(&instance->aen_mutex); | |
2834 | error = megasas_register_aen(instance, aen.seq_num, | |
2835 | aen.class_locale_word); | |
2836 | up(&instance->aen_mutex); | |
2837 | return error; | |
2838 | } | |
2839 | ||
2840 | /** | |
2841 | * megasas_mgmt_ioctl - char node ioctl entry point | |
2842 | */ | |
2843 | static long | |
2844 | megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
2845 | { | |
2846 | switch (cmd) { | |
2847 | case MEGASAS_IOC_FIRMWARE: | |
2848 | return megasas_mgmt_ioctl_fw(file, arg); | |
2849 | ||
2850 | case MEGASAS_IOC_GET_AEN: | |
2851 | return megasas_mgmt_ioctl_aen(file, arg); | |
2852 | } | |
2853 | ||
2854 | return -ENOTTY; | |
2855 | } | |
2856 | ||
2857 | #ifdef CONFIG_COMPAT | |
2858 | static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg) | |
2859 | { | |
2860 | struct compat_megasas_iocpacket __user *cioc = | |
2861 | (struct compat_megasas_iocpacket __user *)arg; | |
2862 | struct megasas_iocpacket __user *ioc = | |
2863 | compat_alloc_user_space(sizeof(struct megasas_iocpacket)); | |
2864 | int i; | |
2865 | int error = 0; | |
2866 | ||
83aabc1b JG |
2867 | if (clear_user(ioc, sizeof(*ioc))) |
2868 | return -EFAULT; | |
c4a3e0a5 BS |
2869 | |
2870 | if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) || | |
2871 | copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) || | |
2872 | copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) || | |
2873 | copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) || | |
2874 | copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) || | |
2875 | copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32))) | |
2876 | return -EFAULT; | |
2877 | ||
2878 | for (i = 0; i < MAX_IOCTL_SGE; i++) { | |
2879 | compat_uptr_t ptr; | |
2880 | ||
2881 | if (get_user(ptr, &cioc->sgl[i].iov_base) || | |
2882 | put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) || | |
2883 | copy_in_user(&ioc->sgl[i].iov_len, | |
2884 | &cioc->sgl[i].iov_len, sizeof(compat_size_t))) | |
2885 | return -EFAULT; | |
2886 | } | |
2887 | ||
2888 | error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc); | |
2889 | ||
2890 | if (copy_in_user(&cioc->frame.hdr.cmd_status, | |
2891 | &ioc->frame.hdr.cmd_status, sizeof(u8))) { | |
2892 | printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n"); | |
2893 | return -EFAULT; | |
2894 | } | |
2895 | return error; | |
2896 | } | |
2897 | ||
2898 | static long | |
2899 | megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd, | |
2900 | unsigned long arg) | |
2901 | { | |
2902 | switch (cmd) { | |
cb59aa6a SP |
2903 | case MEGASAS_IOC_FIRMWARE32: |
2904 | return megasas_mgmt_compat_ioctl_fw(file, arg); | |
c4a3e0a5 BS |
2905 | case MEGASAS_IOC_GET_AEN: |
2906 | return megasas_mgmt_ioctl_aen(file, arg); | |
2907 | } | |
2908 | ||
2909 | return -ENOTTY; | |
2910 | } | |
2911 | #endif | |
2912 | ||
2913 | /* | |
2914 | * File operations structure for management interface | |
2915 | */ | |
2916 | static struct file_operations megasas_mgmt_fops = { | |
2917 | .owner = THIS_MODULE, | |
2918 | .open = megasas_mgmt_open, | |
2919 | .release = megasas_mgmt_release, | |
2920 | .fasync = megasas_mgmt_fasync, | |
2921 | .unlocked_ioctl = megasas_mgmt_ioctl, | |
2922 | #ifdef CONFIG_COMPAT | |
2923 | .compat_ioctl = megasas_mgmt_compat_ioctl, | |
2924 | #endif | |
2925 | }; | |
2926 | ||
2927 | /* | |
2928 | * PCI hotplug support registration structure | |
2929 | */ | |
2930 | static struct pci_driver megasas_pci_driver = { | |
2931 | ||
2932 | .name = "megaraid_sas", | |
2933 | .id_table = megasas_pci_table, | |
2934 | .probe = megasas_probe_one, | |
2935 | .remove = __devexit_p(megasas_detach_one), | |
2936 | .shutdown = megasas_shutdown, | |
2937 | }; | |
2938 | ||
2939 | /* | |
2940 | * Sysfs driver attributes | |
2941 | */ | |
2942 | static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf) | |
2943 | { | |
2944 | return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n", | |
2945 | MEGASAS_VERSION); | |
2946 | } | |
2947 | ||
2948 | static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL); | |
2949 | ||
2950 | static ssize_t | |
2951 | megasas_sysfs_show_release_date(struct device_driver *dd, char *buf) | |
2952 | { | |
2953 | return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n", | |
2954 | MEGASAS_RELDATE); | |
2955 | } | |
2956 | ||
2957 | static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date, | |
2958 | NULL); | |
2959 | ||
658dcedb SP |
2960 | static ssize_t |
2961 | megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf) | |
2962 | { | |
2963 | return sprintf(buf,"%u",megasas_dbg_lvl); | |
2964 | } | |
2965 | ||
2966 | static ssize_t | |
2967 | megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count) | |
2968 | { | |
2969 | int retval = count; | |
2970 | if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){ | |
2971 | printk(KERN_ERR "megasas: could not set dbg_lvl\n"); | |
2972 | retval = -EINVAL; | |
2973 | } | |
2974 | return retval; | |
2975 | } | |
2976 | ||
2977 | static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUGO, megasas_sysfs_show_dbg_lvl, | |
2978 | megasas_sysfs_set_dbg_lvl); | |
2979 | ||
c4a3e0a5 BS |
2980 | /** |
2981 | * megasas_init - Driver load entry point | |
2982 | */ | |
2983 | static int __init megasas_init(void) | |
2984 | { | |
2985 | int rval; | |
2986 | ||
2987 | /* | |
2988 | * Announce driver version and other information | |
2989 | */ | |
2990 | printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION, | |
2991 | MEGASAS_EXT_VERSION); | |
2992 | ||
2993 | memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info)); | |
2994 | ||
2995 | /* | |
2996 | * Register character device node | |
2997 | */ | |
2998 | rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops); | |
2999 | ||
3000 | if (rval < 0) { | |
3001 | printk(KERN_DEBUG "megasas: failed to open device node\n"); | |
3002 | return rval; | |
3003 | } | |
3004 | ||
3005 | megasas_mgmt_majorno = rval; | |
3006 | ||
3007 | /* | |
3008 | * Register ourselves as PCI hotplug module | |
3009 | */ | |
4041b9cd | 3010 | rval = pci_register_driver(&megasas_pci_driver); |
c4a3e0a5 BS |
3011 | |
3012 | if (rval) { | |
3013 | printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n"); | |
83aabc1b JG |
3014 | goto err_pcidrv; |
3015 | } | |
3016 | ||
3017 | rval = driver_create_file(&megasas_pci_driver.driver, | |
3018 | &driver_attr_version); | |
3019 | if (rval) | |
3020 | goto err_dcf_attr_ver; | |
3021 | rval = driver_create_file(&megasas_pci_driver.driver, | |
3022 | &driver_attr_release_date); | |
3023 | if (rval) | |
3024 | goto err_dcf_rel_date; | |
3025 | rval = driver_create_file(&megasas_pci_driver.driver, | |
3026 | &driver_attr_dbg_lvl); | |
3027 | if (rval) | |
3028 | goto err_dcf_dbg_lvl; | |
c4a3e0a5 BS |
3029 | |
3030 | return rval; | |
83aabc1b JG |
3031 | err_dcf_dbg_lvl: |
3032 | driver_remove_file(&megasas_pci_driver.driver, | |
3033 | &driver_attr_release_date); | |
3034 | err_dcf_rel_date: | |
3035 | driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version); | |
3036 | err_dcf_attr_ver: | |
3037 | pci_unregister_driver(&megasas_pci_driver); | |
3038 | err_pcidrv: | |
3039 | unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); | |
3040 | return rval; | |
c4a3e0a5 BS |
3041 | } |
3042 | ||
3043 | /** | |
3044 | * megasas_exit - Driver unload entry point | |
3045 | */ | |
3046 | static void __exit megasas_exit(void) | |
3047 | { | |
658dcedb SP |
3048 | driver_remove_file(&megasas_pci_driver.driver, |
3049 | &driver_attr_dbg_lvl); | |
83aabc1b JG |
3050 | driver_remove_file(&megasas_pci_driver.driver, |
3051 | &driver_attr_release_date); | |
3052 | driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version); | |
c4a3e0a5 BS |
3053 | |
3054 | pci_unregister_driver(&megasas_pci_driver); | |
3055 | unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); | |
3056 | } | |
3057 | ||
3058 | module_init(megasas_init); | |
3059 | module_exit(megasas_exit); |