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c4a3e0a5 BS |
1 | /* |
2 | * | |
3 | * Linux MegaRAID driver for SAS based RAID controllers | |
4 | * | |
f28cd7cf | 5 | * Copyright (c) 2003-2005 LSI Corporation. |
c4a3e0a5 BS |
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 | |
f28cd7cf | 13 | * Version : v00.00.03.16-rc1 |
c4a3e0a5 BS |
14 | * |
15 | * Authors: | |
cc5968c8 SP |
16 | * (email-id : megaraidlinux@lsi.com) |
17 | * Sreenivas Bagalkote | |
18 | * Sumant Patro | |
19 | * Bo Yang | |
c4a3e0a5 BS |
20 | * |
21 | * List of supported controllers | |
22 | * | |
23 | * OEM Product Name VID DID SSVID SSID | |
24 | * --- ------------ --- --- ---- ---- | |
25 | */ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/pci.h> | |
30 | #include <linux/list.h> | |
c4a3e0a5 BS |
31 | #include <linux/moduleparam.h> |
32 | #include <linux/module.h> | |
33 | #include <linux/spinlock.h> | |
34 | #include <linux/interrupt.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/uio.h> | |
37 | #include <asm/uaccess.h> | |
43399236 | 38 | #include <linux/fs.h> |
c4a3e0a5 | 39 | #include <linux/compat.h> |
cf62a0a5 | 40 | #include <linux/blkdev.h> |
0b950672 | 41 | #include <linux/mutex.h> |
c4a3e0a5 BS |
42 | |
43 | #include <scsi/scsi.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
45 | #include <scsi/scsi_device.h> | |
46 | #include <scsi/scsi_host.h> | |
47 | #include "megaraid_sas.h" | |
48 | ||
ad84db2e | 49 | /* |
50 | * poll_mode_io:1- schedule complete completion from q cmd | |
51 | */ | |
52 | static unsigned int poll_mode_io; | |
53 | module_param_named(poll_mode_io, poll_mode_io, int, 0); | |
54 | MODULE_PARM_DESC(poll_mode_io, | |
55 | "Complete cmds from IO path, (default=0)"); | |
56 | ||
c4a3e0a5 BS |
57 | MODULE_LICENSE("GPL"); |
58 | MODULE_VERSION(MEGASAS_VERSION); | |
3d6d174a | 59 | MODULE_AUTHOR("megaraidlinux@lsi.com"); |
f28cd7cf | 60 | MODULE_DESCRIPTION("LSI MegaRAID SAS Driver"); |
c4a3e0a5 BS |
61 | |
62 | /* | |
63 | * PCI ID table for all supported controllers | |
64 | */ | |
65 | static struct pci_device_id megasas_pci_table[] = { | |
66 | ||
f3d7271c HK |
67 | {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)}, |
68 | /* xscale IOP */ | |
69 | {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)}, | |
70 | /* ppc IOP */ | |
71 | {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)}, | |
72 | /* xscale IOP, vega */ | |
73 | {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)}, | |
74 | /* xscale IOP */ | |
75 | {} | |
c4a3e0a5 BS |
76 | }; |
77 | ||
78 | MODULE_DEVICE_TABLE(pci, megasas_pci_table); | |
79 | ||
80 | static int megasas_mgmt_majorno; | |
81 | static struct megasas_mgmt_info megasas_mgmt_info; | |
82 | static struct fasync_struct *megasas_async_queue; | |
0b950672 | 83 | static DEFINE_MUTEX(megasas_async_queue_mutex); |
c4a3e0a5 | 84 | |
658dcedb SP |
85 | static u32 megasas_dbg_lvl; |
86 | ||
7343eb65 | 87 | static void |
88 | megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, | |
89 | u8 alt_status); | |
90 | ||
c4a3e0a5 BS |
91 | /** |
92 | * megasas_get_cmd - Get a command from the free pool | |
93 | * @instance: Adapter soft state | |
94 | * | |
95 | * Returns a free command from the pool | |
96 | */ | |
858119e1 | 97 | static struct megasas_cmd *megasas_get_cmd(struct megasas_instance |
c4a3e0a5 BS |
98 | *instance) |
99 | { | |
100 | unsigned long flags; | |
101 | struct megasas_cmd *cmd = NULL; | |
102 | ||
103 | spin_lock_irqsave(&instance->cmd_pool_lock, flags); | |
104 | ||
105 | if (!list_empty(&instance->cmd_pool)) { | |
106 | cmd = list_entry((&instance->cmd_pool)->next, | |
107 | struct megasas_cmd, list); | |
108 | list_del_init(&cmd->list); | |
109 | } else { | |
110 | printk(KERN_ERR "megasas: Command pool empty!\n"); | |
111 | } | |
112 | ||
113 | spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); | |
114 | return cmd; | |
115 | } | |
116 | ||
117 | /** | |
118 | * megasas_return_cmd - Return a cmd to free command pool | |
119 | * @instance: Adapter soft state | |
120 | * @cmd: Command packet to be returned to free command pool | |
121 | */ | |
122 | static inline void | |
123 | megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
124 | { | |
125 | unsigned long flags; | |
126 | ||
127 | spin_lock_irqsave(&instance->cmd_pool_lock, flags); | |
128 | ||
129 | cmd->scmd = NULL; | |
130 | list_add_tail(&cmd->list, &instance->cmd_pool); | |
131 | ||
132 | spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); | |
133 | } | |
134 | ||
1341c939 SP |
135 | |
136 | /** | |
137 | * The following functions are defined for xscale | |
138 | * (deviceid : 1064R, PERC5) controllers | |
139 | */ | |
140 | ||
c4a3e0a5 | 141 | /** |
1341c939 | 142 | * megasas_enable_intr_xscale - Enables interrupts |
c4a3e0a5 BS |
143 | * @regs: MFI register set |
144 | */ | |
145 | static inline void | |
1341c939 | 146 | megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs) |
c4a3e0a5 BS |
147 | { |
148 | writel(1, &(regs)->outbound_intr_mask); | |
149 | ||
150 | /* Dummy readl to force pci flush */ | |
151 | readl(®s->outbound_intr_mask); | |
152 | } | |
153 | ||
b274cab7 SP |
154 | /** |
155 | * megasas_disable_intr_xscale -Disables interrupt | |
156 | * @regs: MFI register set | |
157 | */ | |
158 | static inline void | |
159 | megasas_disable_intr_xscale(struct megasas_register_set __iomem * regs) | |
160 | { | |
161 | u32 mask = 0x1f; | |
162 | writel(mask, ®s->outbound_intr_mask); | |
163 | /* Dummy readl to force pci flush */ | |
164 | readl(®s->outbound_intr_mask); | |
165 | } | |
166 | ||
1341c939 SP |
167 | /** |
168 | * megasas_read_fw_status_reg_xscale - returns the current FW status value | |
169 | * @regs: MFI register set | |
170 | */ | |
171 | static u32 | |
172 | megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs) | |
173 | { | |
174 | return readl(&(regs)->outbound_msg_0); | |
175 | } | |
176 | /** | |
177 | * megasas_clear_interrupt_xscale - Check & clear interrupt | |
178 | * @regs: MFI register set | |
179 | */ | |
180 | static int | |
181 | megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs) | |
182 | { | |
183 | u32 status; | |
184 | /* | |
185 | * Check if it is our interrupt | |
186 | */ | |
187 | status = readl(®s->outbound_intr_status); | |
188 | ||
189 | if (!(status & MFI_OB_INTR_STATUS_MASK)) { | |
190 | return 1; | |
191 | } | |
192 | ||
193 | /* | |
194 | * Clear the interrupt by writing back the same value | |
195 | */ | |
196 | writel(status, ®s->outbound_intr_status); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | /** | |
202 | * megasas_fire_cmd_xscale - Sends command to the FW | |
203 | * @frame_phys_addr : Physical address of cmd | |
204 | * @frame_count : Number of frames for the command | |
205 | * @regs : MFI register set | |
206 | */ | |
207 | static inline void | |
208 | megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs) | |
209 | { | |
210 | writel((frame_phys_addr >> 3)|(frame_count), | |
211 | &(regs)->inbound_queue_port); | |
212 | } | |
213 | ||
214 | static struct megasas_instance_template megasas_instance_template_xscale = { | |
215 | ||
216 | .fire_cmd = megasas_fire_cmd_xscale, | |
217 | .enable_intr = megasas_enable_intr_xscale, | |
b274cab7 | 218 | .disable_intr = megasas_disable_intr_xscale, |
1341c939 SP |
219 | .clear_intr = megasas_clear_intr_xscale, |
220 | .read_fw_status_reg = megasas_read_fw_status_reg_xscale, | |
221 | }; | |
222 | ||
223 | /** | |
224 | * This is the end of set of functions & definitions specific | |
225 | * to xscale (deviceid : 1064R, PERC5) controllers | |
226 | */ | |
227 | ||
f9876f0b SP |
228 | /** |
229 | * The following functions are defined for ppc (deviceid : 0x60) | |
230 | * controllers | |
231 | */ | |
232 | ||
233 | /** | |
234 | * megasas_enable_intr_ppc - Enables interrupts | |
235 | * @regs: MFI register set | |
236 | */ | |
237 | static inline void | |
238 | megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs) | |
239 | { | |
240 | writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear); | |
241 | ||
242 | writel(~0x80000004, &(regs)->outbound_intr_mask); | |
243 | ||
244 | /* Dummy readl to force pci flush */ | |
245 | readl(®s->outbound_intr_mask); | |
246 | } | |
247 | ||
b274cab7 SP |
248 | /** |
249 | * megasas_disable_intr_ppc - Disable interrupt | |
250 | * @regs: MFI register set | |
251 | */ | |
252 | static inline void | |
253 | megasas_disable_intr_ppc(struct megasas_register_set __iomem * regs) | |
254 | { | |
255 | u32 mask = 0xFFFFFFFF; | |
256 | writel(mask, ®s->outbound_intr_mask); | |
257 | /* Dummy readl to force pci flush */ | |
258 | readl(®s->outbound_intr_mask); | |
259 | } | |
260 | ||
f9876f0b SP |
261 | /** |
262 | * megasas_read_fw_status_reg_ppc - returns the current FW status value | |
263 | * @regs: MFI register set | |
264 | */ | |
265 | static u32 | |
266 | megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs) | |
267 | { | |
268 | return readl(&(regs)->outbound_scratch_pad); | |
269 | } | |
270 | ||
271 | /** | |
272 | * megasas_clear_interrupt_ppc - Check & clear interrupt | |
273 | * @regs: MFI register set | |
274 | */ | |
275 | static int | |
276 | megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs) | |
277 | { | |
278 | u32 status; | |
279 | /* | |
280 | * Check if it is our interrupt | |
281 | */ | |
282 | status = readl(®s->outbound_intr_status); | |
283 | ||
284 | if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) { | |
285 | return 1; | |
286 | } | |
287 | ||
288 | /* | |
289 | * Clear the interrupt by writing back the same value | |
290 | */ | |
291 | writel(status, ®s->outbound_doorbell_clear); | |
292 | ||
293 | return 0; | |
294 | } | |
295 | /** | |
296 | * megasas_fire_cmd_ppc - Sends command to the FW | |
297 | * @frame_phys_addr : Physical address of cmd | |
298 | * @frame_count : Number of frames for the command | |
299 | * @regs : MFI register set | |
300 | */ | |
301 | static inline void | |
302 | megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs) | |
303 | { | |
304 | writel((frame_phys_addr | (frame_count<<1))|1, | |
305 | &(regs)->inbound_queue_port); | |
306 | } | |
307 | ||
308 | static struct megasas_instance_template megasas_instance_template_ppc = { | |
309 | ||
310 | .fire_cmd = megasas_fire_cmd_ppc, | |
311 | .enable_intr = megasas_enable_intr_ppc, | |
b274cab7 | 312 | .disable_intr = megasas_disable_intr_ppc, |
f9876f0b SP |
313 | .clear_intr = megasas_clear_intr_ppc, |
314 | .read_fw_status_reg = megasas_read_fw_status_reg_ppc, | |
315 | }; | |
316 | ||
317 | /** | |
318 | * This is the end of set of functions & definitions | |
319 | * specific to ppc (deviceid : 0x60) controllers | |
320 | */ | |
321 | ||
c4a3e0a5 BS |
322 | /** |
323 | * megasas_issue_polled - Issues a polling command | |
324 | * @instance: Adapter soft state | |
325 | * @cmd: Command packet to be issued | |
326 | * | |
327 | * For polling, MFI requires the cmd_status to be set to 0xFF before posting. | |
328 | */ | |
329 | static int | |
330 | megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
331 | { | |
332 | int i; | |
333 | u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000; | |
334 | ||
335 | struct megasas_header *frame_hdr = &cmd->frame->hdr; | |
336 | ||
337 | frame_hdr->cmd_status = 0xFF; | |
338 | frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE; | |
339 | ||
340 | /* | |
341 | * Issue the frame using inbound queue port | |
342 | */ | |
1341c939 | 343 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
c4a3e0a5 BS |
344 | |
345 | /* | |
346 | * Wait for cmd_status to change | |
347 | */ | |
348 | for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) { | |
349 | rmb(); | |
350 | msleep(1); | |
351 | } | |
352 | ||
353 | if (frame_hdr->cmd_status == 0xff) | |
354 | return -ETIME; | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | /** | |
360 | * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds | |
361 | * @instance: Adapter soft state | |
362 | * @cmd: Command to be issued | |
363 | * | |
364 | * This function waits on an event for the command to be returned from ISR. | |
2a3681e5 | 365 | * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs |
c4a3e0a5 BS |
366 | * Used to issue ioctl commands. |
367 | */ | |
368 | static int | |
369 | megasas_issue_blocked_cmd(struct megasas_instance *instance, | |
370 | struct megasas_cmd *cmd) | |
371 | { | |
372 | cmd->cmd_status = ENODATA; | |
373 | ||
1341c939 | 374 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
c4a3e0a5 | 375 | |
2a3681e5 SP |
376 | wait_event_timeout(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA), |
377 | MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ); | |
c4a3e0a5 BS |
378 | |
379 | return 0; | |
380 | } | |
381 | ||
382 | /** | |
383 | * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd | |
384 | * @instance: Adapter soft state | |
385 | * @cmd_to_abort: Previously issued cmd to be aborted | |
386 | * | |
387 | * MFI firmware can abort previously issued AEN comamnd (automatic event | |
388 | * notification). The megasas_issue_blocked_abort_cmd() issues such abort | |
2a3681e5 SP |
389 | * cmd and waits for return status. |
390 | * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs | |
c4a3e0a5 BS |
391 | */ |
392 | static int | |
393 | megasas_issue_blocked_abort_cmd(struct megasas_instance *instance, | |
394 | struct megasas_cmd *cmd_to_abort) | |
395 | { | |
396 | struct megasas_cmd *cmd; | |
397 | struct megasas_abort_frame *abort_fr; | |
398 | ||
399 | cmd = megasas_get_cmd(instance); | |
400 | ||
401 | if (!cmd) | |
402 | return -1; | |
403 | ||
404 | abort_fr = &cmd->frame->abort; | |
405 | ||
406 | /* | |
407 | * Prepare and issue the abort frame | |
408 | */ | |
409 | abort_fr->cmd = MFI_CMD_ABORT; | |
410 | abort_fr->cmd_status = 0xFF; | |
411 | abort_fr->flags = 0; | |
412 | abort_fr->abort_context = cmd_to_abort->index; | |
413 | abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr; | |
414 | abort_fr->abort_mfi_phys_addr_hi = 0; | |
415 | ||
416 | cmd->sync_cmd = 1; | |
417 | cmd->cmd_status = 0xFF; | |
418 | ||
1341c939 | 419 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
c4a3e0a5 BS |
420 | |
421 | /* | |
422 | * Wait for this cmd to complete | |
423 | */ | |
2a3681e5 SP |
424 | wait_event_timeout(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF), |
425 | MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ); | |
c4a3e0a5 BS |
426 | |
427 | megasas_return_cmd(instance, cmd); | |
428 | return 0; | |
429 | } | |
430 | ||
431 | /** | |
432 | * megasas_make_sgl32 - Prepares 32-bit SGL | |
433 | * @instance: Adapter soft state | |
434 | * @scp: SCSI command from the mid-layer | |
435 | * @mfi_sgl: SGL to be filled in | |
436 | * | |
437 | * If successful, this function returns the number of SG elements. Otherwise, | |
438 | * it returnes -1. | |
439 | */ | |
858119e1 | 440 | static int |
c4a3e0a5 BS |
441 | megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp, |
442 | union megasas_sgl *mfi_sgl) | |
443 | { | |
444 | int i; | |
445 | int sge_count; | |
446 | struct scatterlist *os_sgl; | |
447 | ||
155d98f0 FT |
448 | sge_count = scsi_dma_map(scp); |
449 | BUG_ON(sge_count < 0); | |
c4a3e0a5 | 450 | |
155d98f0 FT |
451 | if (sge_count) { |
452 | scsi_for_each_sg(scp, os_sgl, sge_count, i) { | |
453 | mfi_sgl->sge32[i].length = sg_dma_len(os_sgl); | |
454 | mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl); | |
455 | } | |
c4a3e0a5 | 456 | } |
c4a3e0a5 BS |
457 | return sge_count; |
458 | } | |
459 | ||
460 | /** | |
461 | * megasas_make_sgl64 - Prepares 64-bit SGL | |
462 | * @instance: Adapter soft state | |
463 | * @scp: SCSI command from the mid-layer | |
464 | * @mfi_sgl: SGL to be filled in | |
465 | * | |
466 | * If successful, this function returns the number of SG elements. Otherwise, | |
467 | * it returnes -1. | |
468 | */ | |
858119e1 | 469 | static int |
c4a3e0a5 BS |
470 | megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp, |
471 | union megasas_sgl *mfi_sgl) | |
472 | { | |
473 | int i; | |
474 | int sge_count; | |
475 | struct scatterlist *os_sgl; | |
476 | ||
155d98f0 FT |
477 | sge_count = scsi_dma_map(scp); |
478 | BUG_ON(sge_count < 0); | |
c4a3e0a5 | 479 | |
155d98f0 FT |
480 | if (sge_count) { |
481 | scsi_for_each_sg(scp, os_sgl, sge_count, i) { | |
482 | mfi_sgl->sge64[i].length = sg_dma_len(os_sgl); | |
483 | mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl); | |
484 | } | |
c4a3e0a5 | 485 | } |
c4a3e0a5 BS |
486 | return sge_count; |
487 | } | |
488 | ||
b1df99d9 SP |
489 | /** |
490 | * megasas_get_frame_count - Computes the number of frames | |
491 | * @sge_count : number of sg elements | |
492 | * | |
493 | * Returns the number of frames required for numnber of sge's (sge_count) | |
494 | */ | |
495 | ||
b448de47 | 496 | static u32 megasas_get_frame_count(u8 sge_count) |
b1df99d9 SP |
497 | { |
498 | int num_cnt; | |
499 | int sge_bytes; | |
500 | u32 sge_sz; | |
501 | u32 frame_count=0; | |
502 | ||
503 | sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : | |
504 | sizeof(struct megasas_sge32); | |
505 | ||
506 | /* | |
507 | * Main frame can contain 2 SGEs for 64-bit SGLs and | |
508 | * 3 SGEs for 32-bit SGLs | |
509 | */ | |
510 | if (IS_DMA64) | |
511 | num_cnt = sge_count - 2; | |
512 | else | |
513 | num_cnt = sge_count - 3; | |
514 | ||
515 | if(num_cnt>0){ | |
516 | sge_bytes = sge_sz * num_cnt; | |
517 | ||
518 | frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) + | |
519 | ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ; | |
520 | } | |
521 | /* Main frame */ | |
522 | frame_count +=1; | |
523 | ||
524 | if (frame_count > 7) | |
525 | frame_count = 8; | |
526 | return frame_count; | |
527 | } | |
528 | ||
c4a3e0a5 BS |
529 | /** |
530 | * megasas_build_dcdb - Prepares a direct cdb (DCDB) command | |
531 | * @instance: Adapter soft state | |
532 | * @scp: SCSI command | |
533 | * @cmd: Command to be prepared in | |
534 | * | |
535 | * This function prepares CDB commands. These are typcially pass-through | |
536 | * commands to the devices. | |
537 | */ | |
858119e1 | 538 | static int |
c4a3e0a5 BS |
539 | megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp, |
540 | struct megasas_cmd *cmd) | |
541 | { | |
c4a3e0a5 BS |
542 | u32 is_logical; |
543 | u32 device_id; | |
544 | u16 flags = 0; | |
545 | struct megasas_pthru_frame *pthru; | |
546 | ||
547 | is_logical = MEGASAS_IS_LOGICAL(scp); | |
548 | device_id = MEGASAS_DEV_INDEX(instance, scp); | |
549 | pthru = (struct megasas_pthru_frame *)cmd->frame; | |
550 | ||
551 | if (scp->sc_data_direction == PCI_DMA_TODEVICE) | |
552 | flags = MFI_FRAME_DIR_WRITE; | |
553 | else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) | |
554 | flags = MFI_FRAME_DIR_READ; | |
555 | else if (scp->sc_data_direction == PCI_DMA_NONE) | |
556 | flags = MFI_FRAME_DIR_NONE; | |
557 | ||
558 | /* | |
559 | * Prepare the DCDB frame | |
560 | */ | |
561 | pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO; | |
562 | pthru->cmd_status = 0x0; | |
563 | pthru->scsi_status = 0x0; | |
564 | pthru->target_id = device_id; | |
565 | pthru->lun = scp->device->lun; | |
566 | pthru->cdb_len = scp->cmd_len; | |
567 | pthru->timeout = 0; | |
568 | pthru->flags = flags; | |
155d98f0 | 569 | pthru->data_xfer_len = scsi_bufflen(scp); |
c4a3e0a5 BS |
570 | |
571 | memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); | |
572 | ||
573 | /* | |
574 | * Construct SGL | |
575 | */ | |
c4a3e0a5 BS |
576 | if (IS_DMA64) { |
577 | pthru->flags |= MFI_FRAME_SGL64; | |
578 | pthru->sge_count = megasas_make_sgl64(instance, scp, | |
579 | &pthru->sgl); | |
580 | } else | |
581 | pthru->sge_count = megasas_make_sgl32(instance, scp, | |
582 | &pthru->sgl); | |
583 | ||
584 | /* | |
585 | * Sense info specific | |
586 | */ | |
587 | pthru->sense_len = SCSI_SENSE_BUFFERSIZE; | |
588 | pthru->sense_buf_phys_addr_hi = 0; | |
589 | pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr; | |
590 | ||
c4a3e0a5 BS |
591 | /* |
592 | * Compute the total number of frames this command consumes. FW uses | |
593 | * this number to pull sufficient number of frames from host memory. | |
594 | */ | |
b1df99d9 | 595 | cmd->frame_count = megasas_get_frame_count(pthru->sge_count); |
c4a3e0a5 BS |
596 | |
597 | return cmd->frame_count; | |
598 | } | |
599 | ||
600 | /** | |
601 | * megasas_build_ldio - Prepares IOs to logical devices | |
602 | * @instance: Adapter soft state | |
603 | * @scp: SCSI command | |
604 | * @cmd: Command to to be prepared | |
605 | * | |
606 | * Frames (and accompanying SGLs) for regular SCSI IOs use this function. | |
607 | */ | |
858119e1 | 608 | static int |
c4a3e0a5 BS |
609 | megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp, |
610 | struct megasas_cmd *cmd) | |
611 | { | |
c4a3e0a5 BS |
612 | u32 device_id; |
613 | u8 sc = scp->cmnd[0]; | |
614 | u16 flags = 0; | |
615 | struct megasas_io_frame *ldio; | |
616 | ||
617 | device_id = MEGASAS_DEV_INDEX(instance, scp); | |
618 | ldio = (struct megasas_io_frame *)cmd->frame; | |
619 | ||
620 | if (scp->sc_data_direction == PCI_DMA_TODEVICE) | |
621 | flags = MFI_FRAME_DIR_WRITE; | |
622 | else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) | |
623 | flags = MFI_FRAME_DIR_READ; | |
624 | ||
625 | /* | |
b1df99d9 | 626 | * Prepare the Logical IO frame: 2nd bit is zero for all read cmds |
c4a3e0a5 BS |
627 | */ |
628 | ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ; | |
629 | ldio->cmd_status = 0x0; | |
630 | ldio->scsi_status = 0x0; | |
631 | ldio->target_id = device_id; | |
632 | ldio->timeout = 0; | |
633 | ldio->reserved_0 = 0; | |
634 | ldio->pad_0 = 0; | |
635 | ldio->flags = flags; | |
636 | ldio->start_lba_hi = 0; | |
637 | ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0; | |
638 | ||
639 | /* | |
640 | * 6-byte READ(0x08) or WRITE(0x0A) cdb | |
641 | */ | |
642 | if (scp->cmd_len == 6) { | |
643 | ldio->lba_count = (u32) scp->cmnd[4]; | |
644 | ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) | | |
645 | ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3]; | |
646 | ||
647 | ldio->start_lba_lo &= 0x1FFFFF; | |
648 | } | |
649 | ||
650 | /* | |
651 | * 10-byte READ(0x28) or WRITE(0x2A) cdb | |
652 | */ | |
653 | else if (scp->cmd_len == 10) { | |
654 | ldio->lba_count = (u32) scp->cmnd[8] | | |
655 | ((u32) scp->cmnd[7] << 8); | |
656 | ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) | | |
657 | ((u32) scp->cmnd[3] << 16) | | |
658 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; | |
659 | } | |
660 | ||
661 | /* | |
662 | * 12-byte READ(0xA8) or WRITE(0xAA) cdb | |
663 | */ | |
664 | else if (scp->cmd_len == 12) { | |
665 | ldio->lba_count = ((u32) scp->cmnd[6] << 24) | | |
666 | ((u32) scp->cmnd[7] << 16) | | |
667 | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; | |
668 | ||
669 | ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) | | |
670 | ((u32) scp->cmnd[3] << 16) | | |
671 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; | |
672 | } | |
673 | ||
674 | /* | |
675 | * 16-byte READ(0x88) or WRITE(0x8A) cdb | |
676 | */ | |
677 | else if (scp->cmd_len == 16) { | |
678 | ldio->lba_count = ((u32) scp->cmnd[10] << 24) | | |
679 | ((u32) scp->cmnd[11] << 16) | | |
680 | ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13]; | |
681 | ||
682 | ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) | | |
683 | ((u32) scp->cmnd[7] << 16) | | |
684 | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; | |
685 | ||
686 | ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) | | |
687 | ((u32) scp->cmnd[3] << 16) | | |
688 | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; | |
689 | ||
690 | } | |
691 | ||
692 | /* | |
693 | * Construct SGL | |
694 | */ | |
c4a3e0a5 BS |
695 | if (IS_DMA64) { |
696 | ldio->flags |= MFI_FRAME_SGL64; | |
697 | ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl); | |
698 | } else | |
699 | ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl); | |
700 | ||
701 | /* | |
702 | * Sense info specific | |
703 | */ | |
704 | ldio->sense_len = SCSI_SENSE_BUFFERSIZE; | |
705 | ldio->sense_buf_phys_addr_hi = 0; | |
706 | ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr; | |
707 | ||
b1df99d9 SP |
708 | /* |
709 | * Compute the total number of frames this command consumes. FW uses | |
710 | * this number to pull sufficient number of frames from host memory. | |
711 | */ | |
712 | cmd->frame_count = megasas_get_frame_count(ldio->sge_count); | |
c4a3e0a5 BS |
713 | |
714 | return cmd->frame_count; | |
715 | } | |
716 | ||
717 | /** | |
cb59aa6a SP |
718 | * megasas_is_ldio - Checks if the cmd is for logical drive |
719 | * @scmd: SCSI command | |
720 | * | |
721 | * Called by megasas_queue_command to find out if the command to be queued | |
722 | * is a logical drive command | |
c4a3e0a5 | 723 | */ |
cb59aa6a | 724 | static inline int megasas_is_ldio(struct scsi_cmnd *cmd) |
c4a3e0a5 | 725 | { |
cb59aa6a SP |
726 | if (!MEGASAS_IS_LOGICAL(cmd)) |
727 | return 0; | |
728 | switch (cmd->cmnd[0]) { | |
729 | case READ_10: | |
730 | case WRITE_10: | |
731 | case READ_12: | |
732 | case WRITE_12: | |
733 | case READ_6: | |
734 | case WRITE_6: | |
735 | case READ_16: | |
736 | case WRITE_16: | |
737 | return 1; | |
738 | default: | |
739 | return 0; | |
c4a3e0a5 | 740 | } |
c4a3e0a5 BS |
741 | } |
742 | ||
658dcedb SP |
743 | /** |
744 | * megasas_dump_pending_frames - Dumps the frame address of all pending cmds | |
745 | * in FW | |
746 | * @instance: Adapter soft state | |
747 | */ | |
748 | static inline void | |
749 | megasas_dump_pending_frames(struct megasas_instance *instance) | |
750 | { | |
751 | struct megasas_cmd *cmd; | |
752 | int i,n; | |
753 | union megasas_sgl *mfi_sgl; | |
754 | struct megasas_io_frame *ldio; | |
755 | struct megasas_pthru_frame *pthru; | |
756 | u32 sgcount; | |
757 | u32 max_cmd = instance->max_fw_cmds; | |
758 | ||
759 | printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no); | |
760 | printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding)); | |
761 | if (IS_DMA64) | |
762 | printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no); | |
763 | else | |
764 | printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no); | |
765 | ||
766 | printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no); | |
767 | for (i = 0; i < max_cmd; i++) { | |
768 | cmd = instance->cmd_list[i]; | |
769 | if(!cmd->scmd) | |
770 | continue; | |
771 | printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr); | |
772 | if (megasas_is_ldio(cmd->scmd)){ | |
773 | ldio = (struct megasas_io_frame *)cmd->frame; | |
774 | mfi_sgl = &ldio->sgl; | |
775 | sgcount = ldio->sge_count; | |
776 | 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); | |
777 | } | |
778 | else { | |
779 | pthru = (struct megasas_pthru_frame *) cmd->frame; | |
780 | mfi_sgl = &pthru->sgl; | |
781 | sgcount = pthru->sge_count; | |
782 | 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); | |
783 | } | |
784 | if(megasas_dbg_lvl & MEGASAS_DBG_LVL){ | |
785 | for (n = 0; n < sgcount; n++){ | |
786 | if (IS_DMA64) | |
787 | 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) ; | |
788 | else | |
789 | printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl->sge32[n].length , mfi_sgl->sge32[n].phys_addr) ; | |
790 | } | |
791 | } | |
792 | printk(KERN_ERR "\n"); | |
793 | } /*for max_cmd*/ | |
794 | printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no); | |
795 | for (i = 0; i < max_cmd; i++) { | |
796 | ||
797 | cmd = instance->cmd_list[i]; | |
798 | ||
799 | if(cmd->sync_cmd == 1){ | |
800 | printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr); | |
801 | } | |
802 | } | |
803 | printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no); | |
804 | } | |
805 | ||
c4a3e0a5 BS |
806 | /** |
807 | * megasas_queue_command - Queue entry point | |
808 | * @scmd: SCSI command to be queued | |
809 | * @done: Callback entry point | |
810 | */ | |
811 | static int | |
812 | megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *)) | |
813 | { | |
814 | u32 frame_count; | |
c4a3e0a5 BS |
815 | struct megasas_cmd *cmd; |
816 | struct megasas_instance *instance; | |
817 | ||
818 | instance = (struct megasas_instance *) | |
819 | scmd->device->host->hostdata; | |
af37acfb SP |
820 | |
821 | /* Don't process if we have already declared adapter dead */ | |
822 | if (instance->hw_crit_error) | |
823 | return SCSI_MLQUEUE_HOST_BUSY; | |
824 | ||
c4a3e0a5 BS |
825 | scmd->scsi_done = done; |
826 | scmd->result = 0; | |
827 | ||
cb59aa6a SP |
828 | if (MEGASAS_IS_LOGICAL(scmd) && |
829 | (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) { | |
830 | scmd->result = DID_BAD_TARGET << 16; | |
831 | goto out_done; | |
c4a3e0a5 BS |
832 | } |
833 | ||
02b01e01 SP |
834 | switch (scmd->cmnd[0]) { |
835 | case SYNCHRONIZE_CACHE: | |
836 | /* | |
837 | * FW takes care of flush cache on its own | |
838 | * No need to send it down | |
839 | */ | |
840 | scmd->result = DID_OK << 16; | |
841 | goto out_done; | |
842 | default: | |
843 | break; | |
844 | } | |
845 | ||
cb59aa6a SP |
846 | cmd = megasas_get_cmd(instance); |
847 | if (!cmd) | |
848 | return SCSI_MLQUEUE_HOST_BUSY; | |
849 | ||
850 | /* | |
851 | * Logical drive command | |
852 | */ | |
853 | if (megasas_is_ldio(scmd)) | |
854 | frame_count = megasas_build_ldio(instance, scmd, cmd); | |
855 | else | |
856 | frame_count = megasas_build_dcdb(instance, scmd, cmd); | |
857 | ||
858 | if (!frame_count) | |
859 | goto out_return_cmd; | |
860 | ||
c4a3e0a5 | 861 | cmd->scmd = scmd; |
05e9ebbe | 862 | scmd->SCp.ptr = (char *)cmd; |
c4a3e0a5 BS |
863 | |
864 | /* | |
865 | * Issue the command to the FW | |
866 | */ | |
e4a082c7 | 867 | atomic_inc(&instance->fw_outstanding); |
c4a3e0a5 | 868 | |
1341c939 | 869 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set); |
ad84db2e | 870 | /* |
871 | * Check if we have pend cmds to be completed | |
872 | */ | |
873 | if (poll_mode_io && atomic_read(&instance->fw_outstanding)) | |
874 | tasklet_schedule(&instance->isr_tasklet); | |
875 | ||
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) | |
05e9ebbe | 902 | sdev->timeout = MEGASAS_DEFAULT_CMD_TIMEOUT * HZ; |
147aab6a CH |
903 | return 0; |
904 | } | |
905 | ||
7343eb65 | 906 | /** |
907 | * megasas_complete_cmd_dpc - Returns FW's controller structure | |
908 | * @instance_addr: Address of adapter soft state | |
909 | * | |
910 | * Tasklet to complete cmds | |
911 | */ | |
912 | static void megasas_complete_cmd_dpc(unsigned long instance_addr) | |
913 | { | |
914 | u32 producer; | |
915 | u32 consumer; | |
916 | u32 context; | |
917 | struct megasas_cmd *cmd; | |
918 | struct megasas_instance *instance = | |
919 | (struct megasas_instance *)instance_addr; | |
920 | unsigned long flags; | |
921 | ||
922 | /* If we have already declared adapter dead, donot complete cmds */ | |
923 | if (instance->hw_crit_error) | |
924 | return; | |
925 | ||
926 | spin_lock_irqsave(&instance->completion_lock, flags); | |
927 | ||
928 | producer = *instance->producer; | |
929 | consumer = *instance->consumer; | |
930 | ||
931 | while (consumer != producer) { | |
932 | context = instance->reply_queue[consumer]; | |
933 | ||
934 | cmd = instance->cmd_list[context]; | |
935 | ||
936 | megasas_complete_cmd(instance, cmd, DID_OK); | |
937 | ||
938 | consumer++; | |
939 | if (consumer == (instance->max_fw_cmds + 1)) { | |
940 | consumer = 0; | |
941 | } | |
942 | } | |
943 | ||
944 | *instance->consumer = producer; | |
945 | ||
946 | spin_unlock_irqrestore(&instance->completion_lock, flags); | |
947 | ||
948 | /* | |
949 | * Check if we can restore can_queue | |
950 | */ | |
951 | if (instance->flag & MEGASAS_FW_BUSY | |
952 | && time_after(jiffies, instance->last_time + 5 * HZ) | |
953 | && atomic_read(&instance->fw_outstanding) < 17) { | |
954 | ||
955 | spin_lock_irqsave(instance->host->host_lock, flags); | |
956 | instance->flag &= ~MEGASAS_FW_BUSY; | |
957 | instance->host->can_queue = | |
958 | instance->max_fw_cmds - MEGASAS_INT_CMDS; | |
959 | ||
960 | spin_unlock_irqrestore(instance->host->host_lock, flags); | |
961 | } | |
962 | } | |
963 | ||
c4a3e0a5 BS |
964 | /** |
965 | * megasas_wait_for_outstanding - Wait for all outstanding cmds | |
966 | * @instance: Adapter soft state | |
967 | * | |
968 | * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to | |
969 | * complete all its outstanding commands. Returns error if one or more IOs | |
970 | * are pending after this time period. It also marks the controller dead. | |
971 | */ | |
972 | static int megasas_wait_for_outstanding(struct megasas_instance *instance) | |
973 | { | |
974 | int i; | |
975 | u32 wait_time = MEGASAS_RESET_WAIT_TIME; | |
976 | ||
977 | for (i = 0; i < wait_time; i++) { | |
978 | ||
e4a082c7 SP |
979 | int outstanding = atomic_read(&instance->fw_outstanding); |
980 | ||
981 | if (!outstanding) | |
c4a3e0a5 BS |
982 | break; |
983 | ||
984 | if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) { | |
985 | printk(KERN_NOTICE "megasas: [%2d]waiting for %d " | |
e4a082c7 | 986 | "commands to complete\n",i,outstanding); |
7343eb65 | 987 | /* |
988 | * Call cmd completion routine. Cmd to be | |
989 | * be completed directly without depending on isr. | |
990 | */ | |
991 | megasas_complete_cmd_dpc((unsigned long)instance); | |
c4a3e0a5 BS |
992 | } |
993 | ||
994 | msleep(1000); | |
995 | } | |
996 | ||
e4a082c7 | 997 | if (atomic_read(&instance->fw_outstanding)) { |
e3bbff9f SP |
998 | /* |
999 | * Send signal to FW to stop processing any pending cmds. | |
1000 | * The controller will be taken offline by the OS now. | |
1001 | */ | |
1002 | writel(MFI_STOP_ADP, | |
1003 | &instance->reg_set->inbound_doorbell); | |
658dcedb | 1004 | megasas_dump_pending_frames(instance); |
c4a3e0a5 BS |
1005 | instance->hw_crit_error = 1; |
1006 | return FAILED; | |
1007 | } | |
1008 | ||
1009 | return SUCCESS; | |
1010 | } | |
1011 | ||
1012 | /** | |
1013 | * megasas_generic_reset - Generic reset routine | |
1014 | * @scmd: Mid-layer SCSI command | |
1015 | * | |
1016 | * This routine implements a generic reset handler for device, bus and host | |
1017 | * reset requests. Device, bus and host specific reset handlers can use this | |
1018 | * function after they do their specific tasks. | |
1019 | */ | |
1020 | static int megasas_generic_reset(struct scsi_cmnd *scmd) | |
1021 | { | |
1022 | int ret_val; | |
1023 | struct megasas_instance *instance; | |
1024 | ||
1025 | instance = (struct megasas_instance *)scmd->device->host->hostdata; | |
1026 | ||
05e9ebbe SP |
1027 | scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x retries=%x\n", |
1028 | scmd->serial_number, scmd->cmnd[0], scmd->retries); | |
c4a3e0a5 BS |
1029 | |
1030 | if (instance->hw_crit_error) { | |
1031 | printk(KERN_ERR "megasas: cannot recover from previous reset " | |
1032 | "failures\n"); | |
1033 | return FAILED; | |
1034 | } | |
1035 | ||
c4a3e0a5 | 1036 | ret_val = megasas_wait_for_outstanding(instance); |
c4a3e0a5 BS |
1037 | if (ret_val == SUCCESS) |
1038 | printk(KERN_NOTICE "megasas: reset successful \n"); | |
1039 | else | |
1040 | printk(KERN_ERR "megasas: failed to do reset\n"); | |
1041 | ||
c4a3e0a5 BS |
1042 | return ret_val; |
1043 | } | |
1044 | ||
05e9ebbe SP |
1045 | /** |
1046 | * megasas_reset_timer - quiesce the adapter if required | |
1047 | * @scmd: scsi cmnd | |
1048 | * | |
1049 | * Sets the FW busy flag and reduces the host->can_queue if the | |
1050 | * cmd has not been completed within the timeout period. | |
1051 | */ | |
1052 | static enum | |
1053 | scsi_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd) | |
1054 | { | |
1055 | struct megasas_cmd *cmd = (struct megasas_cmd *)scmd->SCp.ptr; | |
1056 | struct megasas_instance *instance; | |
1057 | unsigned long flags; | |
1058 | ||
1059 | if (time_after(jiffies, scmd->jiffies_at_alloc + | |
1060 | (MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) { | |
1061 | return EH_NOT_HANDLED; | |
1062 | } | |
1063 | ||
1064 | instance = cmd->instance; | |
1065 | if (!(instance->flag & MEGASAS_FW_BUSY)) { | |
1066 | /* FW is busy, throttle IO */ | |
1067 | spin_lock_irqsave(instance->host->host_lock, flags); | |
1068 | ||
1069 | instance->host->can_queue = 16; | |
1070 | instance->last_time = jiffies; | |
1071 | instance->flag |= MEGASAS_FW_BUSY; | |
1072 | ||
1073 | spin_unlock_irqrestore(instance->host->host_lock, flags); | |
1074 | } | |
1075 | return EH_RESET_TIMER; | |
1076 | } | |
1077 | ||
c4a3e0a5 BS |
1078 | /** |
1079 | * megasas_reset_device - Device reset handler entry point | |
1080 | */ | |
1081 | static int megasas_reset_device(struct scsi_cmnd *scmd) | |
1082 | { | |
1083 | int ret; | |
1084 | ||
1085 | /* | |
1086 | * First wait for all commands to complete | |
1087 | */ | |
1088 | ret = megasas_generic_reset(scmd); | |
1089 | ||
1090 | return ret; | |
1091 | } | |
1092 | ||
1093 | /** | |
1094 | * megasas_reset_bus_host - Bus & host reset handler entry point | |
1095 | */ | |
1096 | static int megasas_reset_bus_host(struct scsi_cmnd *scmd) | |
1097 | { | |
1098 | int ret; | |
1099 | ||
1100 | /* | |
80682fa9 | 1101 | * First wait for all commands to complete |
c4a3e0a5 BS |
1102 | */ |
1103 | ret = megasas_generic_reset(scmd); | |
1104 | ||
1105 | return ret; | |
1106 | } | |
1107 | ||
cf62a0a5 SP |
1108 | /** |
1109 | * megasas_bios_param - Returns disk geometry for a disk | |
1110 | * @sdev: device handle | |
1111 | * @bdev: block device | |
1112 | * @capacity: drive capacity | |
1113 | * @geom: geometry parameters | |
1114 | */ | |
1115 | static int | |
1116 | megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev, | |
1117 | sector_t capacity, int geom[]) | |
1118 | { | |
1119 | int heads; | |
1120 | int sectors; | |
1121 | sector_t cylinders; | |
1122 | unsigned long tmp; | |
1123 | /* Default heads (64) & sectors (32) */ | |
1124 | heads = 64; | |
1125 | sectors = 32; | |
1126 | ||
1127 | tmp = heads * sectors; | |
1128 | cylinders = capacity; | |
1129 | ||
1130 | sector_div(cylinders, tmp); | |
1131 | ||
1132 | /* | |
1133 | * Handle extended translation size for logical drives > 1Gb | |
1134 | */ | |
1135 | ||
1136 | if (capacity >= 0x200000) { | |
1137 | heads = 255; | |
1138 | sectors = 63; | |
1139 | tmp = heads*sectors; | |
1140 | cylinders = capacity; | |
1141 | sector_div(cylinders, tmp); | |
1142 | } | |
1143 | ||
1144 | geom[0] = heads; | |
1145 | geom[1] = sectors; | |
1146 | geom[2] = cylinders; | |
1147 | ||
1148 | return 0; | |
1149 | } | |
1150 | ||
c4a3e0a5 BS |
1151 | /** |
1152 | * megasas_service_aen - Processes an event notification | |
1153 | * @instance: Adapter soft state | |
1154 | * @cmd: AEN command completed by the ISR | |
1155 | * | |
1156 | * For AEN, driver sends a command down to FW that is held by the FW till an | |
1157 | * event occurs. When an event of interest occurs, FW completes the command | |
1158 | * that it was previously holding. | |
1159 | * | |
1160 | * This routines sends SIGIO signal to processes that have registered with the | |
1161 | * driver for AEN. | |
1162 | */ | |
1163 | static void | |
1164 | megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd) | |
1165 | { | |
1166 | /* | |
1167 | * Don't signal app if it is just an aborted previously registered aen | |
1168 | */ | |
1169 | if (!cmd->abort_aen) | |
1170 | kill_fasync(&megasas_async_queue, SIGIO, POLL_IN); | |
1171 | else | |
1172 | cmd->abort_aen = 0; | |
1173 | ||
1174 | instance->aen_cmd = NULL; | |
1175 | megasas_return_cmd(instance, cmd); | |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | * Scsi host template for megaraid_sas driver | |
1180 | */ | |
1181 | static struct scsi_host_template megasas_template = { | |
1182 | ||
1183 | .module = THIS_MODULE, | |
f28cd7cf | 1184 | .name = "LSI SAS based MegaRAID driver", |
c4a3e0a5 | 1185 | .proc_name = "megaraid_sas", |
147aab6a | 1186 | .slave_configure = megasas_slave_configure, |
c4a3e0a5 BS |
1187 | .queuecommand = megasas_queue_command, |
1188 | .eh_device_reset_handler = megasas_reset_device, | |
1189 | .eh_bus_reset_handler = megasas_reset_bus_host, | |
1190 | .eh_host_reset_handler = megasas_reset_bus_host, | |
05e9ebbe | 1191 | .eh_timed_out = megasas_reset_timer, |
cf62a0a5 | 1192 | .bios_param = megasas_bios_param, |
c4a3e0a5 BS |
1193 | .use_clustering = ENABLE_CLUSTERING, |
1194 | }; | |
1195 | ||
1196 | /** | |
1197 | * megasas_complete_int_cmd - Completes an internal command | |
1198 | * @instance: Adapter soft state | |
1199 | * @cmd: Command to be completed | |
1200 | * | |
1201 | * The megasas_issue_blocked_cmd() function waits for a command to complete | |
1202 | * after it issues a command. This function wakes up that waiting routine by | |
1203 | * calling wake_up() on the wait queue. | |
1204 | */ | |
1205 | static void | |
1206 | megasas_complete_int_cmd(struct megasas_instance *instance, | |
1207 | struct megasas_cmd *cmd) | |
1208 | { | |
1209 | cmd->cmd_status = cmd->frame->io.cmd_status; | |
1210 | ||
1211 | if (cmd->cmd_status == ENODATA) { | |
1212 | cmd->cmd_status = 0; | |
1213 | } | |
1214 | wake_up(&instance->int_cmd_wait_q); | |
1215 | } | |
1216 | ||
1217 | /** | |
1218 | * megasas_complete_abort - Completes aborting a command | |
1219 | * @instance: Adapter soft state | |
1220 | * @cmd: Cmd that was issued to abort another cmd | |
1221 | * | |
1222 | * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q | |
1223 | * after it issues an abort on a previously issued command. This function | |
1224 | * wakes up all functions waiting on the same wait queue. | |
1225 | */ | |
1226 | static void | |
1227 | megasas_complete_abort(struct megasas_instance *instance, | |
1228 | struct megasas_cmd *cmd) | |
1229 | { | |
1230 | if (cmd->sync_cmd) { | |
1231 | cmd->sync_cmd = 0; | |
1232 | cmd->cmd_status = 0; | |
1233 | wake_up(&instance->abort_cmd_wait_q); | |
1234 | } | |
1235 | ||
1236 | return; | |
1237 | } | |
1238 | ||
c4a3e0a5 BS |
1239 | /** |
1240 | * megasas_complete_cmd - Completes a command | |
1241 | * @instance: Adapter soft state | |
1242 | * @cmd: Command to be completed | |
1243 | * @alt_status: If non-zero, use this value as status to | |
1244 | * SCSI mid-layer instead of the value returned | |
1245 | * by the FW. This should be used if caller wants | |
1246 | * an alternate status (as in the case of aborted | |
1247 | * commands) | |
1248 | */ | |
858119e1 | 1249 | static void |
c4a3e0a5 BS |
1250 | megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, |
1251 | u8 alt_status) | |
1252 | { | |
1253 | int exception = 0; | |
1254 | struct megasas_header *hdr = &cmd->frame->hdr; | |
c4a3e0a5 | 1255 | |
05e9ebbe SP |
1256 | if (cmd->scmd) |
1257 | cmd->scmd->SCp.ptr = NULL; | |
c4a3e0a5 BS |
1258 | |
1259 | switch (hdr->cmd) { | |
1260 | ||
1261 | case MFI_CMD_PD_SCSI_IO: | |
1262 | case MFI_CMD_LD_SCSI_IO: | |
1263 | ||
1264 | /* | |
1265 | * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been | |
1266 | * issued either through an IO path or an IOCTL path. If it | |
1267 | * was via IOCTL, we will send it to internal completion. | |
1268 | */ | |
1269 | if (cmd->sync_cmd) { | |
1270 | cmd->sync_cmd = 0; | |
1271 | megasas_complete_int_cmd(instance, cmd); | |
1272 | break; | |
1273 | } | |
1274 | ||
c4a3e0a5 BS |
1275 | case MFI_CMD_LD_READ: |
1276 | case MFI_CMD_LD_WRITE: | |
1277 | ||
1278 | if (alt_status) { | |
1279 | cmd->scmd->result = alt_status << 16; | |
1280 | exception = 1; | |
1281 | } | |
1282 | ||
1283 | if (exception) { | |
1284 | ||
e4a082c7 | 1285 | atomic_dec(&instance->fw_outstanding); |
c4a3e0a5 | 1286 | |
155d98f0 | 1287 | scsi_dma_unmap(cmd->scmd); |
c4a3e0a5 BS |
1288 | cmd->scmd->scsi_done(cmd->scmd); |
1289 | megasas_return_cmd(instance, cmd); | |
1290 | ||
1291 | break; | |
1292 | } | |
1293 | ||
1294 | switch (hdr->cmd_status) { | |
1295 | ||
1296 | case MFI_STAT_OK: | |
1297 | cmd->scmd->result = DID_OK << 16; | |
1298 | break; | |
1299 | ||
1300 | case MFI_STAT_SCSI_IO_FAILED: | |
1301 | case MFI_STAT_LD_INIT_IN_PROGRESS: | |
1302 | cmd->scmd->result = | |
1303 | (DID_ERROR << 16) | hdr->scsi_status; | |
1304 | break; | |
1305 | ||
1306 | case MFI_STAT_SCSI_DONE_WITH_ERROR: | |
1307 | ||
1308 | cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status; | |
1309 | ||
1310 | if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) { | |
1311 | memset(cmd->scmd->sense_buffer, 0, | |
1312 | SCSI_SENSE_BUFFERSIZE); | |
1313 | memcpy(cmd->scmd->sense_buffer, cmd->sense, | |
1314 | hdr->sense_len); | |
1315 | ||
1316 | cmd->scmd->result |= DRIVER_SENSE << 24; | |
1317 | } | |
1318 | ||
1319 | break; | |
1320 | ||
1321 | case MFI_STAT_LD_OFFLINE: | |
1322 | case MFI_STAT_DEVICE_NOT_FOUND: | |
1323 | cmd->scmd->result = DID_BAD_TARGET << 16; | |
1324 | break; | |
1325 | ||
1326 | default: | |
1327 | printk(KERN_DEBUG "megasas: MFI FW status %#x\n", | |
1328 | hdr->cmd_status); | |
1329 | cmd->scmd->result = DID_ERROR << 16; | |
1330 | break; | |
1331 | } | |
1332 | ||
e4a082c7 | 1333 | atomic_dec(&instance->fw_outstanding); |
c4a3e0a5 | 1334 | |
155d98f0 | 1335 | scsi_dma_unmap(cmd->scmd); |
c4a3e0a5 BS |
1336 | cmd->scmd->scsi_done(cmd->scmd); |
1337 | megasas_return_cmd(instance, cmd); | |
1338 | ||
1339 | break; | |
1340 | ||
1341 | case MFI_CMD_SMP: | |
1342 | case MFI_CMD_STP: | |
1343 | case MFI_CMD_DCMD: | |
1344 | ||
1345 | /* | |
1346 | * See if got an event notification | |
1347 | */ | |
1348 | if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT) | |
1349 | megasas_service_aen(instance, cmd); | |
1350 | else | |
1351 | megasas_complete_int_cmd(instance, cmd); | |
1352 | ||
1353 | break; | |
1354 | ||
1355 | case MFI_CMD_ABORT: | |
1356 | /* | |
1357 | * Cmd issued to abort another cmd returned | |
1358 | */ | |
1359 | megasas_complete_abort(instance, cmd); | |
1360 | break; | |
1361 | ||
1362 | default: | |
1363 | printk("megasas: Unknown command completed! [0x%X]\n", | |
1364 | hdr->cmd); | |
1365 | break; | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | /** | |
1370 | * megasas_deplete_reply_queue - Processes all completed commands | |
1371 | * @instance: Adapter soft state | |
1372 | * @alt_status: Alternate status to be returned to | |
1373 | * SCSI mid-layer instead of the status | |
1374 | * returned by the FW | |
1375 | */ | |
858119e1 | 1376 | static int |
c4a3e0a5 BS |
1377 | megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status) |
1378 | { | |
c4a3e0a5 BS |
1379 | /* |
1380 | * Check if it is our interrupt | |
1341c939 | 1381 | * Clear the interrupt |
c4a3e0a5 | 1382 | */ |
1341c939 | 1383 | if(instance->instancet->clear_intr(instance->reg_set)) |
c4a3e0a5 | 1384 | return IRQ_NONE; |
c4a3e0a5 | 1385 | |
af37acfb SP |
1386 | if (instance->hw_crit_error) |
1387 | goto out_done; | |
5d018ad0 SP |
1388 | /* |
1389 | * Schedule the tasklet for cmd completion | |
1390 | */ | |
1391 | tasklet_schedule(&instance->isr_tasklet); | |
af37acfb | 1392 | out_done: |
c4a3e0a5 BS |
1393 | return IRQ_HANDLED; |
1394 | } | |
1395 | ||
1396 | /** | |
1397 | * megasas_isr - isr entry point | |
1398 | */ | |
7d12e780 | 1399 | static irqreturn_t megasas_isr(int irq, void *devp) |
c4a3e0a5 BS |
1400 | { |
1401 | return megasas_deplete_reply_queue((struct megasas_instance *)devp, | |
1402 | DID_OK); | |
1403 | } | |
1404 | ||
1405 | /** | |
1406 | * megasas_transition_to_ready - Move the FW to READY state | |
1341c939 | 1407 | * @instance: Adapter soft state |
c4a3e0a5 BS |
1408 | * |
1409 | * During the initialization, FW passes can potentially be in any one of | |
1410 | * several possible states. If the FW in operational, waiting-for-handshake | |
1411 | * states, driver must take steps to bring it to ready state. Otherwise, it | |
1412 | * has to wait for the ready state. | |
1413 | */ | |
1414 | static int | |
1341c939 | 1415 | megasas_transition_to_ready(struct megasas_instance* instance) |
c4a3e0a5 BS |
1416 | { |
1417 | int i; | |
1418 | u8 max_wait; | |
1419 | u32 fw_state; | |
1420 | u32 cur_state; | |
1421 | ||
1341c939 | 1422 | fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK; |
c4a3e0a5 | 1423 | |
e3bbff9f SP |
1424 | if (fw_state != MFI_STATE_READY) |
1425 | printk(KERN_INFO "megasas: Waiting for FW to come to ready" | |
1426 | " state\n"); | |
1427 | ||
c4a3e0a5 BS |
1428 | while (fw_state != MFI_STATE_READY) { |
1429 | ||
c4a3e0a5 BS |
1430 | switch (fw_state) { |
1431 | ||
1432 | case MFI_STATE_FAULT: | |
1433 | ||
1434 | printk(KERN_DEBUG "megasas: FW in FAULT state!!\n"); | |
1435 | return -ENODEV; | |
1436 | ||
1437 | case MFI_STATE_WAIT_HANDSHAKE: | |
1438 | /* | |
1439 | * Set the CLR bit in inbound doorbell | |
1440 | */ | |
e3bbff9f | 1441 | writel(MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG, |
1341c939 | 1442 | &instance->reg_set->inbound_doorbell); |
c4a3e0a5 BS |
1443 | |
1444 | max_wait = 2; | |
1445 | cur_state = MFI_STATE_WAIT_HANDSHAKE; | |
1446 | break; | |
1447 | ||
e3bbff9f SP |
1448 | case MFI_STATE_BOOT_MESSAGE_PENDING: |
1449 | writel(MFI_INIT_HOTPLUG, | |
1450 | &instance->reg_set->inbound_doorbell); | |
1451 | ||
1452 | max_wait = 10; | |
1453 | cur_state = MFI_STATE_BOOT_MESSAGE_PENDING; | |
1454 | break; | |
1455 | ||
c4a3e0a5 BS |
1456 | case MFI_STATE_OPERATIONAL: |
1457 | /* | |
e3bbff9f | 1458 | * Bring it to READY state; assuming max wait 10 secs |
c4a3e0a5 | 1459 | */ |
b274cab7 | 1460 | instance->instancet->disable_intr(instance->reg_set); |
e3bbff9f | 1461 | writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell); |
c4a3e0a5 BS |
1462 | |
1463 | max_wait = 10; | |
1464 | cur_state = MFI_STATE_OPERATIONAL; | |
1465 | break; | |
1466 | ||
1467 | case MFI_STATE_UNDEFINED: | |
1468 | /* | |
1469 | * This state should not last for more than 2 seconds | |
1470 | */ | |
1471 | max_wait = 2; | |
1472 | cur_state = MFI_STATE_UNDEFINED; | |
1473 | break; | |
1474 | ||
1475 | case MFI_STATE_BB_INIT: | |
1476 | max_wait = 2; | |
1477 | cur_state = MFI_STATE_BB_INIT; | |
1478 | break; | |
1479 | ||
1480 | case MFI_STATE_FW_INIT: | |
1481 | max_wait = 20; | |
1482 | cur_state = MFI_STATE_FW_INIT; | |
1483 | break; | |
1484 | ||
1485 | case MFI_STATE_FW_INIT_2: | |
1486 | max_wait = 20; | |
1487 | cur_state = MFI_STATE_FW_INIT_2; | |
1488 | break; | |
1489 | ||
1490 | case MFI_STATE_DEVICE_SCAN: | |
1491 | max_wait = 20; | |
1492 | cur_state = MFI_STATE_DEVICE_SCAN; | |
1493 | break; | |
1494 | ||
1495 | case MFI_STATE_FLUSH_CACHE: | |
1496 | max_wait = 20; | |
1497 | cur_state = MFI_STATE_FLUSH_CACHE; | |
1498 | break; | |
1499 | ||
1500 | default: | |
1501 | printk(KERN_DEBUG "megasas: Unknown state 0x%x\n", | |
1502 | fw_state); | |
1503 | return -ENODEV; | |
1504 | } | |
1505 | ||
1506 | /* | |
1507 | * The cur_state should not last for more than max_wait secs | |
1508 | */ | |
1509 | for (i = 0; i < (max_wait * 1000); i++) { | |
1341c939 SP |
1510 | fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & |
1511 | MFI_STATE_MASK ; | |
c4a3e0a5 BS |
1512 | |
1513 | if (fw_state == cur_state) { | |
1514 | msleep(1); | |
1515 | } else | |
1516 | break; | |
1517 | } | |
1518 | ||
1519 | /* | |
1520 | * Return error if fw_state hasn't changed after max_wait | |
1521 | */ | |
1522 | if (fw_state == cur_state) { | |
1523 | printk(KERN_DEBUG "FW state [%d] hasn't changed " | |
1524 | "in %d secs\n", fw_state, max_wait); | |
1525 | return -ENODEV; | |
1526 | } | |
1527 | }; | |
e3bbff9f | 1528 | printk(KERN_INFO "megasas: FW now in Ready state\n"); |
c4a3e0a5 BS |
1529 | |
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | /** | |
1534 | * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool | |
1535 | * @instance: Adapter soft state | |
1536 | */ | |
1537 | static void megasas_teardown_frame_pool(struct megasas_instance *instance) | |
1538 | { | |
1539 | int i; | |
1540 | u32 max_cmd = instance->max_fw_cmds; | |
1541 | struct megasas_cmd *cmd; | |
1542 | ||
1543 | if (!instance->frame_dma_pool) | |
1544 | return; | |
1545 | ||
1546 | /* | |
1547 | * Return all frames to pool | |
1548 | */ | |
1549 | for (i = 0; i < max_cmd; i++) { | |
1550 | ||
1551 | cmd = instance->cmd_list[i]; | |
1552 | ||
1553 | if (cmd->frame) | |
1554 | pci_pool_free(instance->frame_dma_pool, cmd->frame, | |
1555 | cmd->frame_phys_addr); | |
1556 | ||
1557 | if (cmd->sense) | |
e3bbff9f | 1558 | pci_pool_free(instance->sense_dma_pool, cmd->sense, |
c4a3e0a5 BS |
1559 | cmd->sense_phys_addr); |
1560 | } | |
1561 | ||
1562 | /* | |
1563 | * Now destroy the pool itself | |
1564 | */ | |
1565 | pci_pool_destroy(instance->frame_dma_pool); | |
1566 | pci_pool_destroy(instance->sense_dma_pool); | |
1567 | ||
1568 | instance->frame_dma_pool = NULL; | |
1569 | instance->sense_dma_pool = NULL; | |
1570 | } | |
1571 | ||
1572 | /** | |
1573 | * megasas_create_frame_pool - Creates DMA pool for cmd frames | |
1574 | * @instance: Adapter soft state | |
1575 | * | |
1576 | * Each command packet has an embedded DMA memory buffer that is used for | |
1577 | * filling MFI frame and the SG list that immediately follows the frame. This | |
1578 | * function creates those DMA memory buffers for each command packet by using | |
1579 | * PCI pool facility. | |
1580 | */ | |
1581 | static int megasas_create_frame_pool(struct megasas_instance *instance) | |
1582 | { | |
1583 | int i; | |
1584 | u32 max_cmd; | |
1585 | u32 sge_sz; | |
1586 | u32 sgl_sz; | |
1587 | u32 total_sz; | |
1588 | u32 frame_count; | |
1589 | struct megasas_cmd *cmd; | |
1590 | ||
1591 | max_cmd = instance->max_fw_cmds; | |
1592 | ||
1593 | /* | |
1594 | * Size of our frame is 64 bytes for MFI frame, followed by max SG | |
1595 | * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer | |
1596 | */ | |
1597 | sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : | |
1598 | sizeof(struct megasas_sge32); | |
1599 | ||
1600 | /* | |
1601 | * Calculated the number of 64byte frames required for SGL | |
1602 | */ | |
1603 | sgl_sz = sge_sz * instance->max_num_sge; | |
1604 | frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE; | |
1605 | ||
1606 | /* | |
1607 | * We need one extra frame for the MFI command | |
1608 | */ | |
1609 | frame_count++; | |
1610 | ||
1611 | total_sz = MEGAMFI_FRAME_SIZE * frame_count; | |
1612 | /* | |
1613 | * Use DMA pool facility provided by PCI layer | |
1614 | */ | |
1615 | instance->frame_dma_pool = pci_pool_create("megasas frame pool", | |
1616 | instance->pdev, total_sz, 64, | |
1617 | 0); | |
1618 | ||
1619 | if (!instance->frame_dma_pool) { | |
1620 | printk(KERN_DEBUG "megasas: failed to setup frame pool\n"); | |
1621 | return -ENOMEM; | |
1622 | } | |
1623 | ||
1624 | instance->sense_dma_pool = pci_pool_create("megasas sense pool", | |
1625 | instance->pdev, 128, 4, 0); | |
1626 | ||
1627 | if (!instance->sense_dma_pool) { | |
1628 | printk(KERN_DEBUG "megasas: failed to setup sense pool\n"); | |
1629 | ||
1630 | pci_pool_destroy(instance->frame_dma_pool); | |
1631 | instance->frame_dma_pool = NULL; | |
1632 | ||
1633 | return -ENOMEM; | |
1634 | } | |
1635 | ||
1636 | /* | |
1637 | * Allocate and attach a frame to each of the commands in cmd_list. | |
1638 | * By making cmd->index as the context instead of the &cmd, we can | |
1639 | * always use 32bit context regardless of the architecture | |
1640 | */ | |
1641 | for (i = 0; i < max_cmd; i++) { | |
1642 | ||
1643 | cmd = instance->cmd_list[i]; | |
1644 | ||
1645 | cmd->frame = pci_pool_alloc(instance->frame_dma_pool, | |
1646 | GFP_KERNEL, &cmd->frame_phys_addr); | |
1647 | ||
1648 | cmd->sense = pci_pool_alloc(instance->sense_dma_pool, | |
1649 | GFP_KERNEL, &cmd->sense_phys_addr); | |
1650 | ||
1651 | /* | |
1652 | * megasas_teardown_frame_pool() takes care of freeing | |
1653 | * whatever has been allocated | |
1654 | */ | |
1655 | if (!cmd->frame || !cmd->sense) { | |
1656 | printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n"); | |
1657 | megasas_teardown_frame_pool(instance); | |
1658 | return -ENOMEM; | |
1659 | } | |
1660 | ||
1661 | cmd->frame->io.context = cmd->index; | |
1662 | } | |
1663 | ||
1664 | return 0; | |
1665 | } | |
1666 | ||
1667 | /** | |
1668 | * megasas_free_cmds - Free all the cmds in the free cmd pool | |
1669 | * @instance: Adapter soft state | |
1670 | */ | |
1671 | static void megasas_free_cmds(struct megasas_instance *instance) | |
1672 | { | |
1673 | int i; | |
1674 | /* First free the MFI frame pool */ | |
1675 | megasas_teardown_frame_pool(instance); | |
1676 | ||
1677 | /* Free all the commands in the cmd_list */ | |
1678 | for (i = 0; i < instance->max_fw_cmds; i++) | |
1679 | kfree(instance->cmd_list[i]); | |
1680 | ||
1681 | /* Free the cmd_list buffer itself */ | |
1682 | kfree(instance->cmd_list); | |
1683 | instance->cmd_list = NULL; | |
1684 | ||
1685 | INIT_LIST_HEAD(&instance->cmd_pool); | |
1686 | } | |
1687 | ||
1688 | /** | |
1689 | * megasas_alloc_cmds - Allocates the command packets | |
1690 | * @instance: Adapter soft state | |
1691 | * | |
1692 | * Each command that is issued to the FW, whether IO commands from the OS or | |
1693 | * internal commands like IOCTLs, are wrapped in local data structure called | |
1694 | * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to | |
1695 | * the FW. | |
1696 | * | |
1697 | * Each frame has a 32-bit field called context (tag). This context is used | |
1698 | * to get back the megasas_cmd from the frame when a frame gets completed in | |
1699 | * the ISR. Typically the address of the megasas_cmd itself would be used as | |
1700 | * the context. But we wanted to keep the differences between 32 and 64 bit | |
1701 | * systems to the mininum. We always use 32 bit integers for the context. In | |
1702 | * this driver, the 32 bit values are the indices into an array cmd_list. | |
1703 | * This array is used only to look up the megasas_cmd given the context. The | |
1704 | * free commands themselves are maintained in a linked list called cmd_pool. | |
1705 | */ | |
1706 | static int megasas_alloc_cmds(struct megasas_instance *instance) | |
1707 | { | |
1708 | int i; | |
1709 | int j; | |
1710 | u32 max_cmd; | |
1711 | struct megasas_cmd *cmd; | |
1712 | ||
1713 | max_cmd = instance->max_fw_cmds; | |
1714 | ||
1715 | /* | |
1716 | * instance->cmd_list is an array of struct megasas_cmd pointers. | |
1717 | * Allocate the dynamic array first and then allocate individual | |
1718 | * commands. | |
1719 | */ | |
dd00cc48 | 1720 | instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL); |
c4a3e0a5 BS |
1721 | |
1722 | if (!instance->cmd_list) { | |
1723 | printk(KERN_DEBUG "megasas: out of memory\n"); | |
1724 | return -ENOMEM; | |
1725 | } | |
1726 | ||
c4a3e0a5 BS |
1727 | |
1728 | for (i = 0; i < max_cmd; i++) { | |
1729 | instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd), | |
1730 | GFP_KERNEL); | |
1731 | ||
1732 | if (!instance->cmd_list[i]) { | |
1733 | ||
1734 | for (j = 0; j < i; j++) | |
1735 | kfree(instance->cmd_list[j]); | |
1736 | ||
1737 | kfree(instance->cmd_list); | |
1738 | instance->cmd_list = NULL; | |
1739 | ||
1740 | return -ENOMEM; | |
1741 | } | |
1742 | } | |
1743 | ||
1744 | /* | |
1745 | * Add all the commands to command pool (instance->cmd_pool) | |
1746 | */ | |
1747 | for (i = 0; i < max_cmd; i++) { | |
1748 | cmd = instance->cmd_list[i]; | |
1749 | memset(cmd, 0, sizeof(struct megasas_cmd)); | |
1750 | cmd->index = i; | |
1751 | cmd->instance = instance; | |
1752 | ||
1753 | list_add_tail(&cmd->list, &instance->cmd_pool); | |
1754 | } | |
1755 | ||
1756 | /* | |
1757 | * Create a frame pool and assign one frame to each cmd | |
1758 | */ | |
1759 | if (megasas_create_frame_pool(instance)) { | |
1760 | printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n"); | |
1761 | megasas_free_cmds(instance); | |
1762 | } | |
1763 | ||
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | /** | |
1768 | * megasas_get_controller_info - Returns FW's controller structure | |
1769 | * @instance: Adapter soft state | |
1770 | * @ctrl_info: Controller information structure | |
1771 | * | |
1772 | * Issues an internal command (DCMD) to get the FW's controller structure. | |
1773 | * This information is mainly used to find out the maximum IO transfer per | |
1774 | * command supported by the FW. | |
1775 | */ | |
1776 | static int | |
1777 | megasas_get_ctrl_info(struct megasas_instance *instance, | |
1778 | struct megasas_ctrl_info *ctrl_info) | |
1779 | { | |
1780 | int ret = 0; | |
1781 | struct megasas_cmd *cmd; | |
1782 | struct megasas_dcmd_frame *dcmd; | |
1783 | struct megasas_ctrl_info *ci; | |
1784 | dma_addr_t ci_h = 0; | |
1785 | ||
1786 | cmd = megasas_get_cmd(instance); | |
1787 | ||
1788 | if (!cmd) { | |
1789 | printk(KERN_DEBUG "megasas: Failed to get a free cmd\n"); | |
1790 | return -ENOMEM; | |
1791 | } | |
1792 | ||
1793 | dcmd = &cmd->frame->dcmd; | |
1794 | ||
1795 | ci = pci_alloc_consistent(instance->pdev, | |
1796 | sizeof(struct megasas_ctrl_info), &ci_h); | |
1797 | ||
1798 | if (!ci) { | |
1799 | printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n"); | |
1800 | megasas_return_cmd(instance, cmd); | |
1801 | return -ENOMEM; | |
1802 | } | |
1803 | ||
1804 | memset(ci, 0, sizeof(*ci)); | |
1805 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
1806 | ||
1807 | dcmd->cmd = MFI_CMD_DCMD; | |
1808 | dcmd->cmd_status = 0xFF; | |
1809 | dcmd->sge_count = 1; | |
1810 | dcmd->flags = MFI_FRAME_DIR_READ; | |
1811 | dcmd->timeout = 0; | |
1812 | dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info); | |
1813 | dcmd->opcode = MR_DCMD_CTRL_GET_INFO; | |
1814 | dcmd->sgl.sge32[0].phys_addr = ci_h; | |
1815 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info); | |
1816 | ||
1817 | if (!megasas_issue_polled(instance, cmd)) { | |
1818 | ret = 0; | |
1819 | memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info)); | |
1820 | } else { | |
1821 | ret = -1; | |
1822 | } | |
1823 | ||
1824 | pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info), | |
1825 | ci, ci_h); | |
1826 | ||
1827 | megasas_return_cmd(instance, cmd); | |
1828 | return ret; | |
1829 | } | |
1830 | ||
31ea7088 | 1831 | /** |
1832 | * megasas_issue_init_mfi - Initializes the FW | |
1833 | * @instance: Adapter soft state | |
1834 | * | |
1835 | * Issues the INIT MFI cmd | |
1836 | */ | |
1837 | static int | |
1838 | megasas_issue_init_mfi(struct megasas_instance *instance) | |
1839 | { | |
1840 | u32 context; | |
1841 | ||
1842 | struct megasas_cmd *cmd; | |
1843 | ||
1844 | struct megasas_init_frame *init_frame; | |
1845 | struct megasas_init_queue_info *initq_info; | |
1846 | dma_addr_t init_frame_h; | |
1847 | dma_addr_t initq_info_h; | |
1848 | ||
1849 | /* | |
1850 | * Prepare a init frame. Note the init frame points to queue info | |
1851 | * structure. Each frame has SGL allocated after first 64 bytes. For | |
1852 | * this frame - since we don't need any SGL - we use SGL's space as | |
1853 | * queue info structure | |
1854 | * | |
1855 | * We will not get a NULL command below. We just created the pool. | |
1856 | */ | |
1857 | cmd = megasas_get_cmd(instance); | |
1858 | ||
1859 | init_frame = (struct megasas_init_frame *)cmd->frame; | |
1860 | initq_info = (struct megasas_init_queue_info *) | |
1861 | ((unsigned long)init_frame + 64); | |
1862 | ||
1863 | init_frame_h = cmd->frame_phys_addr; | |
1864 | initq_info_h = init_frame_h + 64; | |
1865 | ||
1866 | context = init_frame->context; | |
1867 | memset(init_frame, 0, MEGAMFI_FRAME_SIZE); | |
1868 | memset(initq_info, 0, sizeof(struct megasas_init_queue_info)); | |
1869 | init_frame->context = context; | |
1870 | ||
1871 | initq_info->reply_queue_entries = instance->max_fw_cmds + 1; | |
1872 | initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h; | |
1873 | ||
1874 | initq_info->producer_index_phys_addr_lo = instance->producer_h; | |
1875 | initq_info->consumer_index_phys_addr_lo = instance->consumer_h; | |
1876 | ||
1877 | init_frame->cmd = MFI_CMD_INIT; | |
1878 | init_frame->cmd_status = 0xFF; | |
1879 | init_frame->queue_info_new_phys_addr_lo = initq_info_h; | |
1880 | ||
1881 | init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info); | |
1882 | ||
1883 | /* | |
1884 | * disable the intr before firing the init frame to FW | |
1885 | */ | |
1886 | instance->instancet->disable_intr(instance->reg_set); | |
1887 | ||
1888 | /* | |
1889 | * Issue the init frame in polled mode | |
1890 | */ | |
1891 | ||
1892 | if (megasas_issue_polled(instance, cmd)) { | |
1893 | printk(KERN_ERR "megasas: Failed to init firmware\n"); | |
1894 | megasas_return_cmd(instance, cmd); | |
1895 | goto fail_fw_init; | |
1896 | } | |
1897 | ||
1898 | megasas_return_cmd(instance, cmd); | |
1899 | ||
1900 | return 0; | |
1901 | ||
1902 | fail_fw_init: | |
1903 | return -EINVAL; | |
1904 | } | |
1905 | ||
ad84db2e | 1906 | /** |
1907 | * megasas_start_timer - Initializes a timer object | |
1908 | * @instance: Adapter soft state | |
1909 | * @timer: timer object to be initialized | |
1910 | * @fn: timer function | |
1911 | * @interval: time interval between timer function call | |
1912 | */ | |
1913 | static inline void | |
1914 | megasas_start_timer(struct megasas_instance *instance, | |
1915 | struct timer_list *timer, | |
1916 | void *fn, unsigned long interval) | |
1917 | { | |
1918 | init_timer(timer); | |
1919 | timer->expires = jiffies + interval; | |
1920 | timer->data = (unsigned long)instance; | |
1921 | timer->function = fn; | |
1922 | add_timer(timer); | |
1923 | } | |
1924 | ||
1925 | /** | |
1926 | * megasas_io_completion_timer - Timer fn | |
1927 | * @instance_addr: Address of adapter soft state | |
1928 | * | |
1929 | * Schedules tasklet for cmd completion | |
1930 | * if poll_mode_io is set | |
1931 | */ | |
1932 | static void | |
1933 | megasas_io_completion_timer(unsigned long instance_addr) | |
1934 | { | |
1935 | struct megasas_instance *instance = | |
1936 | (struct megasas_instance *)instance_addr; | |
1937 | ||
1938 | if (atomic_read(&instance->fw_outstanding)) | |
1939 | tasklet_schedule(&instance->isr_tasklet); | |
1940 | ||
1941 | /* Restart timer */ | |
1942 | if (poll_mode_io) | |
1943 | mod_timer(&instance->io_completion_timer, | |
1944 | jiffies + MEGASAS_COMPLETION_TIMER_INTERVAL); | |
1945 | } | |
1946 | ||
c4a3e0a5 BS |
1947 | /** |
1948 | * megasas_init_mfi - Initializes the FW | |
1949 | * @instance: Adapter soft state | |
1950 | * | |
1951 | * This is the main function for initializing MFI firmware. | |
1952 | */ | |
1953 | static int megasas_init_mfi(struct megasas_instance *instance) | |
1954 | { | |
1955 | u32 context_sz; | |
1956 | u32 reply_q_sz; | |
1957 | u32 max_sectors_1; | |
1958 | u32 max_sectors_2; | |
14faea9f | 1959 | u32 tmp_sectors; |
c4a3e0a5 | 1960 | struct megasas_register_set __iomem *reg_set; |
c4a3e0a5 | 1961 | struct megasas_ctrl_info *ctrl_info; |
c4a3e0a5 BS |
1962 | /* |
1963 | * Map the message registers | |
1964 | */ | |
1965 | instance->base_addr = pci_resource_start(instance->pdev, 0); | |
1966 | ||
f28cd7cf | 1967 | if (pci_request_regions(instance->pdev, "megasas: LSI")) { |
c4a3e0a5 BS |
1968 | printk(KERN_DEBUG "megasas: IO memory region busy!\n"); |
1969 | return -EBUSY; | |
1970 | } | |
1971 | ||
1972 | instance->reg_set = ioremap_nocache(instance->base_addr, 8192); | |
1973 | ||
1974 | if (!instance->reg_set) { | |
1975 | printk(KERN_DEBUG "megasas: Failed to map IO mem\n"); | |
1976 | goto fail_ioremap; | |
1977 | } | |
1978 | ||
1979 | reg_set = instance->reg_set; | |
1980 | ||
f9876f0b SP |
1981 | switch(instance->pdev->device) |
1982 | { | |
1983 | case PCI_DEVICE_ID_LSI_SAS1078R: | |
1984 | instance->instancet = &megasas_instance_template_ppc; | |
1985 | break; | |
1986 | case PCI_DEVICE_ID_LSI_SAS1064R: | |
1987 | case PCI_DEVICE_ID_DELL_PERC5: | |
1988 | default: | |
1989 | instance->instancet = &megasas_instance_template_xscale; | |
1990 | break; | |
1991 | } | |
1341c939 | 1992 | |
c4a3e0a5 BS |
1993 | /* |
1994 | * We expect the FW state to be READY | |
1995 | */ | |
1341c939 | 1996 | if (megasas_transition_to_ready(instance)) |
c4a3e0a5 BS |
1997 | goto fail_ready_state; |
1998 | ||
1999 | /* | |
2000 | * Get various operational parameters from status register | |
2001 | */ | |
1341c939 | 2002 | instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF; |
e3bbff9f SP |
2003 | /* |
2004 | * Reduce the max supported cmds by 1. This is to ensure that the | |
2005 | * reply_q_sz (1 more than the max cmd that driver may send) | |
2006 | * does not exceed max cmds that the FW can support | |
2007 | */ | |
2008 | instance->max_fw_cmds = instance->max_fw_cmds-1; | |
1341c939 SP |
2009 | instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >> |
2010 | 0x10; | |
c4a3e0a5 BS |
2011 | /* |
2012 | * Create a pool of commands | |
2013 | */ | |
2014 | if (megasas_alloc_cmds(instance)) | |
2015 | goto fail_alloc_cmds; | |
2016 | ||
2017 | /* | |
2018 | * Allocate memory for reply queue. Length of reply queue should | |
2019 | * be _one_ more than the maximum commands handled by the firmware. | |
2020 | * | |
2021 | * Note: When FW completes commands, it places corresponding contex | |
2022 | * values in this circular reply queue. This circular queue is a fairly | |
2023 | * typical producer-consumer queue. FW is the producer (of completed | |
2024 | * commands) and the driver is the consumer. | |
2025 | */ | |
2026 | context_sz = sizeof(u32); | |
2027 | reply_q_sz = context_sz * (instance->max_fw_cmds + 1); | |
2028 | ||
2029 | instance->reply_queue = pci_alloc_consistent(instance->pdev, | |
2030 | reply_q_sz, | |
2031 | &instance->reply_queue_h); | |
2032 | ||
2033 | if (!instance->reply_queue) { | |
2034 | printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n"); | |
2035 | goto fail_reply_queue; | |
2036 | } | |
2037 | ||
31ea7088 | 2038 | if (megasas_issue_init_mfi(instance)) |
c4a3e0a5 | 2039 | goto fail_fw_init; |
c4a3e0a5 BS |
2040 | |
2041 | ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL); | |
2042 | ||
2043 | /* | |
2044 | * Compute the max allowed sectors per IO: The controller info has two | |
2045 | * limits on max sectors. Driver should use the minimum of these two. | |
2046 | * | |
2047 | * 1 << stripe_sz_ops.min = max sectors per strip | |
2048 | * | |
2049 | * Note that older firmwares ( < FW ver 30) didn't report information | |
2050 | * to calculate max_sectors_1. So the number ended up as zero always. | |
2051 | */ | |
14faea9f | 2052 | tmp_sectors = 0; |
c4a3e0a5 BS |
2053 | if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) { |
2054 | ||
2055 | max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) * | |
2056 | ctrl_info->max_strips_per_io; | |
2057 | max_sectors_2 = ctrl_info->max_request_size; | |
2058 | ||
14faea9f | 2059 | tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2); |
2060 | } | |
2061 | ||
2062 | instance->max_sectors_per_req = instance->max_num_sge * | |
2063 | PAGE_SIZE / 512; | |
2064 | if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors)) | |
2065 | instance->max_sectors_per_req = tmp_sectors; | |
c4a3e0a5 BS |
2066 | |
2067 | kfree(ctrl_info); | |
2068 | ||
5d018ad0 SP |
2069 | /* |
2070 | * Setup tasklet for cmd completion | |
2071 | */ | |
2072 | ||
ad84db2e | 2073 | tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc, |
2074 | (unsigned long)instance); | |
2075 | ||
2076 | /* Initialize the cmd completion timer */ | |
2077 | if (poll_mode_io) | |
2078 | megasas_start_timer(instance, &instance->io_completion_timer, | |
2079 | megasas_io_completion_timer, | |
2080 | MEGASAS_COMPLETION_TIMER_INTERVAL); | |
c4a3e0a5 BS |
2081 | return 0; |
2082 | ||
2083 | fail_fw_init: | |
c4a3e0a5 BS |
2084 | |
2085 | pci_free_consistent(instance->pdev, reply_q_sz, | |
2086 | instance->reply_queue, instance->reply_queue_h); | |
2087 | fail_reply_queue: | |
2088 | megasas_free_cmds(instance); | |
2089 | ||
2090 | fail_alloc_cmds: | |
2091 | fail_ready_state: | |
2092 | iounmap(instance->reg_set); | |
2093 | ||
2094 | fail_ioremap: | |
2095 | pci_release_regions(instance->pdev); | |
2096 | ||
2097 | return -EINVAL; | |
2098 | } | |
2099 | ||
2100 | /** | |
2101 | * megasas_release_mfi - Reverses the FW initialization | |
2102 | * @intance: Adapter soft state | |
2103 | */ | |
2104 | static void megasas_release_mfi(struct megasas_instance *instance) | |
2105 | { | |
2106 | u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1); | |
2107 | ||
2108 | pci_free_consistent(instance->pdev, reply_q_sz, | |
2109 | instance->reply_queue, instance->reply_queue_h); | |
2110 | ||
2111 | megasas_free_cmds(instance); | |
2112 | ||
2113 | iounmap(instance->reg_set); | |
2114 | ||
2115 | pci_release_regions(instance->pdev); | |
2116 | } | |
2117 | ||
2118 | /** | |
2119 | * megasas_get_seq_num - Gets latest event sequence numbers | |
2120 | * @instance: Adapter soft state | |
2121 | * @eli: FW event log sequence numbers information | |
2122 | * | |
2123 | * FW maintains a log of all events in a non-volatile area. Upper layers would | |
2124 | * usually find out the latest sequence number of the events, the seq number at | |
2125 | * the boot etc. They would "read" all the events below the latest seq number | |
2126 | * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq | |
2127 | * number), they would subsribe to AEN (asynchronous event notification) and | |
2128 | * wait for the events to happen. | |
2129 | */ | |
2130 | static int | |
2131 | megasas_get_seq_num(struct megasas_instance *instance, | |
2132 | struct megasas_evt_log_info *eli) | |
2133 | { | |
2134 | struct megasas_cmd *cmd; | |
2135 | struct megasas_dcmd_frame *dcmd; | |
2136 | struct megasas_evt_log_info *el_info; | |
2137 | dma_addr_t el_info_h = 0; | |
2138 | ||
2139 | cmd = megasas_get_cmd(instance); | |
2140 | ||
2141 | if (!cmd) { | |
2142 | return -ENOMEM; | |
2143 | } | |
2144 | ||
2145 | dcmd = &cmd->frame->dcmd; | |
2146 | el_info = pci_alloc_consistent(instance->pdev, | |
2147 | sizeof(struct megasas_evt_log_info), | |
2148 | &el_info_h); | |
2149 | ||
2150 | if (!el_info) { | |
2151 | megasas_return_cmd(instance, cmd); | |
2152 | return -ENOMEM; | |
2153 | } | |
2154 | ||
2155 | memset(el_info, 0, sizeof(*el_info)); | |
2156 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2157 | ||
2158 | dcmd->cmd = MFI_CMD_DCMD; | |
2159 | dcmd->cmd_status = 0x0; | |
2160 | dcmd->sge_count = 1; | |
2161 | dcmd->flags = MFI_FRAME_DIR_READ; | |
2162 | dcmd->timeout = 0; | |
2163 | dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info); | |
2164 | dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO; | |
2165 | dcmd->sgl.sge32[0].phys_addr = el_info_h; | |
2166 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info); | |
2167 | ||
2168 | megasas_issue_blocked_cmd(instance, cmd); | |
2169 | ||
2170 | /* | |
2171 | * Copy the data back into callers buffer | |
2172 | */ | |
2173 | memcpy(eli, el_info, sizeof(struct megasas_evt_log_info)); | |
2174 | ||
2175 | pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info), | |
2176 | el_info, el_info_h); | |
2177 | ||
2178 | megasas_return_cmd(instance, cmd); | |
2179 | ||
2180 | return 0; | |
2181 | } | |
2182 | ||
2183 | /** | |
2184 | * megasas_register_aen - Registers for asynchronous event notification | |
2185 | * @instance: Adapter soft state | |
2186 | * @seq_num: The starting sequence number | |
2187 | * @class_locale: Class of the event | |
2188 | * | |
2189 | * This function subscribes for AEN for events beyond the @seq_num. It requests | |
2190 | * to be notified if and only if the event is of type @class_locale | |
2191 | */ | |
2192 | static int | |
2193 | megasas_register_aen(struct megasas_instance *instance, u32 seq_num, | |
2194 | u32 class_locale_word) | |
2195 | { | |
2196 | int ret_val; | |
2197 | struct megasas_cmd *cmd; | |
2198 | struct megasas_dcmd_frame *dcmd; | |
2199 | union megasas_evt_class_locale curr_aen; | |
2200 | union megasas_evt_class_locale prev_aen; | |
2201 | ||
2202 | /* | |
2203 | * If there an AEN pending already (aen_cmd), check if the | |
2204 | * class_locale of that pending AEN is inclusive of the new | |
2205 | * AEN request we currently have. If it is, then we don't have | |
2206 | * to do anything. In other words, whichever events the current | |
2207 | * AEN request is subscribing to, have already been subscribed | |
2208 | * to. | |
2209 | * | |
2210 | * If the old_cmd is _not_ inclusive, then we have to abort | |
2211 | * that command, form a class_locale that is superset of both | |
2212 | * old and current and re-issue to the FW | |
2213 | */ | |
2214 | ||
2215 | curr_aen.word = class_locale_word; | |
2216 | ||
2217 | if (instance->aen_cmd) { | |
2218 | ||
2219 | prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1]; | |
2220 | ||
2221 | /* | |
2222 | * A class whose enum value is smaller is inclusive of all | |
2223 | * higher values. If a PROGRESS (= -1) was previously | |
2224 | * registered, then a new registration requests for higher | |
2225 | * classes need not be sent to FW. They are automatically | |
2226 | * included. | |
2227 | * | |
2228 | * Locale numbers don't have such hierarchy. They are bitmap | |
2229 | * values | |
2230 | */ | |
2231 | if ((prev_aen.members.class <= curr_aen.members.class) && | |
2232 | !((prev_aen.members.locale & curr_aen.members.locale) ^ | |
2233 | curr_aen.members.locale)) { | |
2234 | /* | |
2235 | * Previously issued event registration includes | |
2236 | * current request. Nothing to do. | |
2237 | */ | |
2238 | return 0; | |
2239 | } else { | |
2240 | curr_aen.members.locale |= prev_aen.members.locale; | |
2241 | ||
2242 | if (prev_aen.members.class < curr_aen.members.class) | |
2243 | curr_aen.members.class = prev_aen.members.class; | |
2244 | ||
2245 | instance->aen_cmd->abort_aen = 1; | |
2246 | ret_val = megasas_issue_blocked_abort_cmd(instance, | |
2247 | instance-> | |
2248 | aen_cmd); | |
2249 | ||
2250 | if (ret_val) { | |
2251 | printk(KERN_DEBUG "megasas: Failed to abort " | |
2252 | "previous AEN command\n"); | |
2253 | return ret_val; | |
2254 | } | |
2255 | } | |
2256 | } | |
2257 | ||
2258 | cmd = megasas_get_cmd(instance); | |
2259 | ||
2260 | if (!cmd) | |
2261 | return -ENOMEM; | |
2262 | ||
2263 | dcmd = &cmd->frame->dcmd; | |
2264 | ||
2265 | memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail)); | |
2266 | ||
2267 | /* | |
2268 | * Prepare DCMD for aen registration | |
2269 | */ | |
2270 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2271 | ||
2272 | dcmd->cmd = MFI_CMD_DCMD; | |
2273 | dcmd->cmd_status = 0x0; | |
2274 | dcmd->sge_count = 1; | |
2275 | dcmd->flags = MFI_FRAME_DIR_READ; | |
2276 | dcmd->timeout = 0; | |
2277 | dcmd->data_xfer_len = sizeof(struct megasas_evt_detail); | |
2278 | dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT; | |
2279 | dcmd->mbox.w[0] = seq_num; | |
2280 | dcmd->mbox.w[1] = curr_aen.word; | |
2281 | dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h; | |
2282 | dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail); | |
2283 | ||
2284 | /* | |
2285 | * Store reference to the cmd used to register for AEN. When an | |
2286 | * application wants us to register for AEN, we have to abort this | |
2287 | * cmd and re-register with a new EVENT LOCALE supplied by that app | |
2288 | */ | |
2289 | instance->aen_cmd = cmd; | |
2290 | ||
2291 | /* | |
2292 | * Issue the aen registration frame | |
2293 | */ | |
1341c939 | 2294 | instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
c4a3e0a5 BS |
2295 | |
2296 | return 0; | |
2297 | } | |
2298 | ||
2299 | /** | |
2300 | * megasas_start_aen - Subscribes to AEN during driver load time | |
2301 | * @instance: Adapter soft state | |
2302 | */ | |
2303 | static int megasas_start_aen(struct megasas_instance *instance) | |
2304 | { | |
2305 | struct megasas_evt_log_info eli; | |
2306 | union megasas_evt_class_locale class_locale; | |
2307 | ||
2308 | /* | |
2309 | * Get the latest sequence number from FW | |
2310 | */ | |
2311 | memset(&eli, 0, sizeof(eli)); | |
2312 | ||
2313 | if (megasas_get_seq_num(instance, &eli)) | |
2314 | return -1; | |
2315 | ||
2316 | /* | |
2317 | * Register AEN with FW for latest sequence number plus 1 | |
2318 | */ | |
2319 | class_locale.members.reserved = 0; | |
2320 | class_locale.members.locale = MR_EVT_LOCALE_ALL; | |
2321 | class_locale.members.class = MR_EVT_CLASS_DEBUG; | |
2322 | ||
2323 | return megasas_register_aen(instance, eli.newest_seq_num + 1, | |
2324 | class_locale.word); | |
2325 | } | |
2326 | ||
2327 | /** | |
2328 | * megasas_io_attach - Attaches this driver to SCSI mid-layer | |
2329 | * @instance: Adapter soft state | |
2330 | */ | |
2331 | static int megasas_io_attach(struct megasas_instance *instance) | |
2332 | { | |
2333 | struct Scsi_Host *host = instance->host; | |
2334 | ||
2335 | /* | |
2336 | * Export parameters required by SCSI mid-layer | |
2337 | */ | |
2338 | host->irq = instance->pdev->irq; | |
2339 | host->unique_id = instance->unique_id; | |
2340 | host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS; | |
2341 | host->this_id = instance->init_id; | |
2342 | host->sg_tablesize = instance->max_num_sge; | |
2343 | host->max_sectors = instance->max_sectors_per_req; | |
2344 | host->cmd_per_lun = 128; | |
2345 | host->max_channel = MEGASAS_MAX_CHANNELS - 1; | |
2346 | host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL; | |
2347 | host->max_lun = MEGASAS_MAX_LUN; | |
122da302 | 2348 | host->max_cmd_len = 16; |
c4a3e0a5 BS |
2349 | |
2350 | /* | |
2351 | * Notify the mid-layer about the new controller | |
2352 | */ | |
2353 | if (scsi_add_host(host, &instance->pdev->dev)) { | |
2354 | printk(KERN_DEBUG "megasas: scsi_add_host failed\n"); | |
2355 | return -ENODEV; | |
2356 | } | |
2357 | ||
2358 | /* | |
2359 | * Trigger SCSI to scan our drives | |
2360 | */ | |
2361 | scsi_scan_host(host); | |
2362 | return 0; | |
2363 | } | |
2364 | ||
31ea7088 | 2365 | static int |
2366 | megasas_set_dma_mask(struct pci_dev *pdev) | |
2367 | { | |
2368 | /* | |
2369 | * All our contollers are capable of performing 64-bit DMA | |
2370 | */ | |
2371 | if (IS_DMA64) { | |
2372 | if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) { | |
2373 | ||
2374 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) | |
2375 | goto fail_set_dma_mask; | |
2376 | } | |
2377 | } else { | |
2378 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) | |
2379 | goto fail_set_dma_mask; | |
2380 | } | |
2381 | return 0; | |
2382 | ||
2383 | fail_set_dma_mask: | |
2384 | return 1; | |
2385 | } | |
2386 | ||
c4a3e0a5 BS |
2387 | /** |
2388 | * megasas_probe_one - PCI hotplug entry point | |
2389 | * @pdev: PCI device structure | |
2390 | * @id: PCI ids of supported hotplugged adapter | |
2391 | */ | |
2392 | static int __devinit | |
2393 | megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) | |
2394 | { | |
2395 | int rval; | |
2396 | struct Scsi_Host *host; | |
2397 | struct megasas_instance *instance; | |
2398 | ||
2399 | /* | |
2400 | * Announce PCI information | |
2401 | */ | |
2402 | printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", | |
2403 | pdev->vendor, pdev->device, pdev->subsystem_vendor, | |
2404 | pdev->subsystem_device); | |
2405 | ||
2406 | printk("bus %d:slot %d:func %d\n", | |
2407 | pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); | |
2408 | ||
2409 | /* | |
2410 | * PCI prepping: enable device set bus mastering and dma mask | |
2411 | */ | |
2412 | rval = pci_enable_device(pdev); | |
2413 | ||
2414 | if (rval) { | |
2415 | return rval; | |
2416 | } | |
2417 | ||
2418 | pci_set_master(pdev); | |
2419 | ||
31ea7088 | 2420 | if (megasas_set_dma_mask(pdev)) |
2421 | goto fail_set_dma_mask; | |
c4a3e0a5 BS |
2422 | |
2423 | host = scsi_host_alloc(&megasas_template, | |
2424 | sizeof(struct megasas_instance)); | |
2425 | ||
2426 | if (!host) { | |
2427 | printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n"); | |
2428 | goto fail_alloc_instance; | |
2429 | } | |
2430 | ||
2431 | instance = (struct megasas_instance *)host->hostdata; | |
2432 | memset(instance, 0, sizeof(*instance)); | |
2433 | ||
2434 | instance->producer = pci_alloc_consistent(pdev, sizeof(u32), | |
2435 | &instance->producer_h); | |
2436 | instance->consumer = pci_alloc_consistent(pdev, sizeof(u32), | |
2437 | &instance->consumer_h); | |
2438 | ||
2439 | if (!instance->producer || !instance->consumer) { | |
2440 | printk(KERN_DEBUG "megasas: Failed to allocate memory for " | |
2441 | "producer, consumer\n"); | |
2442 | goto fail_alloc_dma_buf; | |
2443 | } | |
2444 | ||
2445 | *instance->producer = 0; | |
2446 | *instance->consumer = 0; | |
2447 | ||
2448 | instance->evt_detail = pci_alloc_consistent(pdev, | |
2449 | sizeof(struct | |
2450 | megasas_evt_detail), | |
2451 | &instance->evt_detail_h); | |
2452 | ||
2453 | if (!instance->evt_detail) { | |
2454 | printk(KERN_DEBUG "megasas: Failed to allocate memory for " | |
2455 | "event detail structure\n"); | |
2456 | goto fail_alloc_dma_buf; | |
2457 | } | |
2458 | ||
2459 | /* | |
2460 | * Initialize locks and queues | |
2461 | */ | |
2462 | INIT_LIST_HEAD(&instance->cmd_pool); | |
2463 | ||
e4a082c7 SP |
2464 | atomic_set(&instance->fw_outstanding,0); |
2465 | ||
c4a3e0a5 BS |
2466 | init_waitqueue_head(&instance->int_cmd_wait_q); |
2467 | init_waitqueue_head(&instance->abort_cmd_wait_q); | |
2468 | ||
2469 | spin_lock_init(&instance->cmd_pool_lock); | |
7343eb65 | 2470 | spin_lock_init(&instance->completion_lock); |
c4a3e0a5 | 2471 | |
e5a69e27 | 2472 | mutex_init(&instance->aen_mutex); |
c4a3e0a5 BS |
2473 | sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS); |
2474 | ||
2475 | /* | |
2476 | * Initialize PCI related and misc parameters | |
2477 | */ | |
2478 | instance->pdev = pdev; | |
2479 | instance->host = host; | |
2480 | instance->unique_id = pdev->bus->number << 8 | pdev->devfn; | |
2481 | instance->init_id = MEGASAS_DEFAULT_INIT_ID; | |
2482 | ||
658dcedb | 2483 | megasas_dbg_lvl = 0; |
05e9ebbe SP |
2484 | instance->flag = 0; |
2485 | instance->last_time = 0; | |
658dcedb | 2486 | |
c4a3e0a5 BS |
2487 | /* |
2488 | * Initialize MFI Firmware | |
2489 | */ | |
2490 | if (megasas_init_mfi(instance)) | |
2491 | goto fail_init_mfi; | |
2492 | ||
2493 | /* | |
2494 | * Register IRQ | |
2495 | */ | |
1d6f359a | 2496 | if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED, "megasas", instance)) { |
c4a3e0a5 BS |
2497 | printk(KERN_DEBUG "megasas: Failed to register IRQ\n"); |
2498 | goto fail_irq; | |
2499 | } | |
2500 | ||
1341c939 | 2501 | instance->instancet->enable_intr(instance->reg_set); |
c4a3e0a5 BS |
2502 | |
2503 | /* | |
2504 | * Store instance in PCI softstate | |
2505 | */ | |
2506 | pci_set_drvdata(pdev, instance); | |
2507 | ||
2508 | /* | |
2509 | * Add this controller to megasas_mgmt_info structure so that it | |
2510 | * can be exported to management applications | |
2511 | */ | |
2512 | megasas_mgmt_info.count++; | |
2513 | megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance; | |
2514 | megasas_mgmt_info.max_index++; | |
2515 | ||
2516 | /* | |
2517 | * Initiate AEN (Asynchronous Event Notification) | |
2518 | */ | |
2519 | if (megasas_start_aen(instance)) { | |
2520 | printk(KERN_DEBUG "megasas: start aen failed\n"); | |
2521 | goto fail_start_aen; | |
2522 | } | |
2523 | ||
2524 | /* | |
2525 | * Register with SCSI mid-layer | |
2526 | */ | |
2527 | if (megasas_io_attach(instance)) | |
2528 | goto fail_io_attach; | |
2529 | ||
2530 | return 0; | |
2531 | ||
2532 | fail_start_aen: | |
2533 | fail_io_attach: | |
2534 | megasas_mgmt_info.count--; | |
2535 | megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL; | |
2536 | megasas_mgmt_info.max_index--; | |
2537 | ||
2538 | pci_set_drvdata(pdev, NULL); | |
b274cab7 | 2539 | instance->instancet->disable_intr(instance->reg_set); |
c4a3e0a5 BS |
2540 | free_irq(instance->pdev->irq, instance); |
2541 | ||
2542 | megasas_release_mfi(instance); | |
2543 | ||
2544 | fail_irq: | |
2545 | fail_init_mfi: | |
2546 | fail_alloc_dma_buf: | |
2547 | if (instance->evt_detail) | |
2548 | pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), | |
2549 | instance->evt_detail, | |
2550 | instance->evt_detail_h); | |
2551 | ||
2552 | if (instance->producer) | |
2553 | pci_free_consistent(pdev, sizeof(u32), instance->producer, | |
2554 | instance->producer_h); | |
2555 | if (instance->consumer) | |
2556 | pci_free_consistent(pdev, sizeof(u32), instance->consumer, | |
2557 | instance->consumer_h); | |
2558 | scsi_host_put(host); | |
2559 | ||
2560 | fail_alloc_instance: | |
2561 | fail_set_dma_mask: | |
2562 | pci_disable_device(pdev); | |
2563 | ||
2564 | return -ENODEV; | |
2565 | } | |
2566 | ||
2567 | /** | |
2568 | * megasas_flush_cache - Requests FW to flush all its caches | |
2569 | * @instance: Adapter soft state | |
2570 | */ | |
2571 | static void megasas_flush_cache(struct megasas_instance *instance) | |
2572 | { | |
2573 | struct megasas_cmd *cmd; | |
2574 | struct megasas_dcmd_frame *dcmd; | |
2575 | ||
2576 | cmd = megasas_get_cmd(instance); | |
2577 | ||
2578 | if (!cmd) | |
2579 | return; | |
2580 | ||
2581 | dcmd = &cmd->frame->dcmd; | |
2582 | ||
2583 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2584 | ||
2585 | dcmd->cmd = MFI_CMD_DCMD; | |
2586 | dcmd->cmd_status = 0x0; | |
2587 | dcmd->sge_count = 0; | |
2588 | dcmd->flags = MFI_FRAME_DIR_NONE; | |
2589 | dcmd->timeout = 0; | |
2590 | dcmd->data_xfer_len = 0; | |
2591 | dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH; | |
2592 | dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE; | |
2593 | ||
2594 | megasas_issue_blocked_cmd(instance, cmd); | |
2595 | ||
2596 | megasas_return_cmd(instance, cmd); | |
2597 | ||
2598 | return; | |
2599 | } | |
2600 | ||
2601 | /** | |
2602 | * megasas_shutdown_controller - Instructs FW to shutdown the controller | |
2603 | * @instance: Adapter soft state | |
31ea7088 | 2604 | * @opcode: Shutdown/Hibernate |
c4a3e0a5 | 2605 | */ |
31ea7088 | 2606 | static void megasas_shutdown_controller(struct megasas_instance *instance, |
2607 | u32 opcode) | |
c4a3e0a5 BS |
2608 | { |
2609 | struct megasas_cmd *cmd; | |
2610 | struct megasas_dcmd_frame *dcmd; | |
2611 | ||
2612 | cmd = megasas_get_cmd(instance); | |
2613 | ||
2614 | if (!cmd) | |
2615 | return; | |
2616 | ||
2617 | if (instance->aen_cmd) | |
2618 | megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd); | |
2619 | ||
2620 | dcmd = &cmd->frame->dcmd; | |
2621 | ||
2622 | memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); | |
2623 | ||
2624 | dcmd->cmd = MFI_CMD_DCMD; | |
2625 | dcmd->cmd_status = 0x0; | |
2626 | dcmd->sge_count = 0; | |
2627 | dcmd->flags = MFI_FRAME_DIR_NONE; | |
2628 | dcmd->timeout = 0; | |
2629 | dcmd->data_xfer_len = 0; | |
31ea7088 | 2630 | dcmd->opcode = opcode; |
c4a3e0a5 BS |
2631 | |
2632 | megasas_issue_blocked_cmd(instance, cmd); | |
2633 | ||
2634 | megasas_return_cmd(instance, cmd); | |
2635 | ||
2636 | return; | |
2637 | } | |
2638 | ||
31ea7088 | 2639 | /** |
ad84db2e | 2640 | * megasas_suspend - driver suspend entry point |
2641 | * @pdev: PCI device structure | |
31ea7088 | 2642 | * @state: PCI power state to suspend routine |
2643 | */ | |
2644 | static int __devinit | |
2645 | megasas_suspend(struct pci_dev *pdev, pm_message_t state) | |
2646 | { | |
2647 | struct Scsi_Host *host; | |
2648 | struct megasas_instance *instance; | |
2649 | ||
2650 | instance = pci_get_drvdata(pdev); | |
2651 | host = instance->host; | |
2652 | ||
ad84db2e | 2653 | if (poll_mode_io) |
2654 | del_timer_sync(&instance->io_completion_timer); | |
2655 | ||
31ea7088 | 2656 | megasas_flush_cache(instance); |
2657 | megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN); | |
2658 | tasklet_kill(&instance->isr_tasklet); | |
2659 | ||
2660 | pci_set_drvdata(instance->pdev, instance); | |
2661 | instance->instancet->disable_intr(instance->reg_set); | |
2662 | free_irq(instance->pdev->irq, instance); | |
2663 | ||
2664 | pci_save_state(pdev); | |
2665 | pci_disable_device(pdev); | |
2666 | ||
2667 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
2668 | ||
2669 | return 0; | |
2670 | } | |
2671 | ||
2672 | /** | |
2673 | * megasas_resume- driver resume entry point | |
2674 | * @pdev: PCI device structure | |
2675 | */ | |
2676 | static int __devinit | |
2677 | megasas_resume(struct pci_dev *pdev) | |
2678 | { | |
2679 | int rval; | |
2680 | struct Scsi_Host *host; | |
2681 | struct megasas_instance *instance; | |
2682 | ||
2683 | instance = pci_get_drvdata(pdev); | |
2684 | host = instance->host; | |
2685 | pci_set_power_state(pdev, PCI_D0); | |
2686 | pci_enable_wake(pdev, PCI_D0, 0); | |
2687 | pci_restore_state(pdev); | |
2688 | ||
2689 | /* | |
2690 | * PCI prepping: enable device set bus mastering and dma mask | |
2691 | */ | |
2692 | rval = pci_enable_device(pdev); | |
2693 | ||
2694 | if (rval) { | |
2695 | printk(KERN_ERR "megasas: Enable device failed\n"); | |
2696 | return rval; | |
2697 | } | |
2698 | ||
2699 | pci_set_master(pdev); | |
2700 | ||
2701 | if (megasas_set_dma_mask(pdev)) | |
2702 | goto fail_set_dma_mask; | |
2703 | ||
2704 | /* | |
2705 | * Initialize MFI Firmware | |
2706 | */ | |
2707 | ||
2708 | *instance->producer = 0; | |
2709 | *instance->consumer = 0; | |
2710 | ||
2711 | atomic_set(&instance->fw_outstanding, 0); | |
2712 | ||
2713 | /* | |
2714 | * We expect the FW state to be READY | |
2715 | */ | |
2716 | if (megasas_transition_to_ready(instance)) | |
2717 | goto fail_ready_state; | |
2718 | ||
2719 | if (megasas_issue_init_mfi(instance)) | |
2720 | goto fail_init_mfi; | |
2721 | ||
2722 | tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc, | |
2723 | (unsigned long)instance); | |
2724 | ||
2725 | /* | |
2726 | * Register IRQ | |
2727 | */ | |
2728 | if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED, | |
2729 | "megasas", instance)) { | |
2730 | printk(KERN_ERR "megasas: Failed to register IRQ\n"); | |
2731 | goto fail_irq; | |
2732 | } | |
2733 | ||
2734 | instance->instancet->enable_intr(instance->reg_set); | |
2735 | ||
2736 | /* | |
2737 | * Initiate AEN (Asynchronous Event Notification) | |
2738 | */ | |
2739 | if (megasas_start_aen(instance)) | |
2740 | printk(KERN_ERR "megasas: Start AEN failed\n"); | |
2741 | ||
ad84db2e | 2742 | /* Initialize the cmd completion timer */ |
2743 | if (poll_mode_io) | |
2744 | megasas_start_timer(instance, &instance->io_completion_timer, | |
2745 | megasas_io_completion_timer, | |
2746 | MEGASAS_COMPLETION_TIMER_INTERVAL); | |
31ea7088 | 2747 | return 0; |
2748 | ||
2749 | fail_irq: | |
2750 | fail_init_mfi: | |
2751 | if (instance->evt_detail) | |
2752 | pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), | |
2753 | instance->evt_detail, | |
2754 | instance->evt_detail_h); | |
2755 | ||
2756 | if (instance->producer) | |
2757 | pci_free_consistent(pdev, sizeof(u32), instance->producer, | |
2758 | instance->producer_h); | |
2759 | if (instance->consumer) | |
2760 | pci_free_consistent(pdev, sizeof(u32), instance->consumer, | |
2761 | instance->consumer_h); | |
2762 | scsi_host_put(host); | |
2763 | ||
2764 | fail_set_dma_mask: | |
2765 | fail_ready_state: | |
2766 | ||
2767 | pci_disable_device(pdev); | |
2768 | ||
2769 | return -ENODEV; | |
2770 | } | |
2771 | ||
c4a3e0a5 BS |
2772 | /** |
2773 | * megasas_detach_one - PCI hot"un"plug entry point | |
2774 | * @pdev: PCI device structure | |
2775 | */ | |
2776 | static void megasas_detach_one(struct pci_dev *pdev) | |
2777 | { | |
2778 | int i; | |
2779 | struct Scsi_Host *host; | |
2780 | struct megasas_instance *instance; | |
2781 | ||
2782 | instance = pci_get_drvdata(pdev); | |
2783 | host = instance->host; | |
2784 | ||
ad84db2e | 2785 | if (poll_mode_io) |
2786 | del_timer_sync(&instance->io_completion_timer); | |
2787 | ||
c4a3e0a5 BS |
2788 | scsi_remove_host(instance->host); |
2789 | megasas_flush_cache(instance); | |
31ea7088 | 2790 | megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN); |
5d018ad0 | 2791 | tasklet_kill(&instance->isr_tasklet); |
c4a3e0a5 BS |
2792 | |
2793 | /* | |
2794 | * Take the instance off the instance array. Note that we will not | |
2795 | * decrement the max_index. We let this array be sparse array | |
2796 | */ | |
2797 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { | |
2798 | if (megasas_mgmt_info.instance[i] == instance) { | |
2799 | megasas_mgmt_info.count--; | |
2800 | megasas_mgmt_info.instance[i] = NULL; | |
2801 | ||
2802 | break; | |
2803 | } | |
2804 | } | |
2805 | ||
2806 | pci_set_drvdata(instance->pdev, NULL); | |
2807 | ||
b274cab7 | 2808 | instance->instancet->disable_intr(instance->reg_set); |
c4a3e0a5 BS |
2809 | |
2810 | free_irq(instance->pdev->irq, instance); | |
2811 | ||
2812 | megasas_release_mfi(instance); | |
2813 | ||
2814 | pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), | |
2815 | instance->evt_detail, instance->evt_detail_h); | |
2816 | ||
2817 | pci_free_consistent(pdev, sizeof(u32), instance->producer, | |
2818 | instance->producer_h); | |
2819 | ||
2820 | pci_free_consistent(pdev, sizeof(u32), instance->consumer, | |
2821 | instance->consumer_h); | |
2822 | ||
2823 | scsi_host_put(host); | |
2824 | ||
2825 | pci_set_drvdata(pdev, NULL); | |
2826 | ||
2827 | pci_disable_device(pdev); | |
2828 | ||
2829 | return; | |
2830 | } | |
2831 | ||
2832 | /** | |
2833 | * megasas_shutdown - Shutdown entry point | |
2834 | * @device: Generic device structure | |
2835 | */ | |
2836 | static void megasas_shutdown(struct pci_dev *pdev) | |
2837 | { | |
2838 | struct megasas_instance *instance = pci_get_drvdata(pdev); | |
2839 | megasas_flush_cache(instance); | |
2840 | } | |
2841 | ||
2842 | /** | |
2843 | * megasas_mgmt_open - char node "open" entry point | |
2844 | */ | |
2845 | static int megasas_mgmt_open(struct inode *inode, struct file *filep) | |
2846 | { | |
2847 | /* | |
2848 | * Allow only those users with admin rights | |
2849 | */ | |
2850 | if (!capable(CAP_SYS_ADMIN)) | |
2851 | return -EACCES; | |
2852 | ||
2853 | return 0; | |
2854 | } | |
2855 | ||
2856 | /** | |
2857 | * megasas_mgmt_release - char node "release" entry point | |
2858 | */ | |
2859 | static int megasas_mgmt_release(struct inode *inode, struct file *filep) | |
2860 | { | |
2861 | filep->private_data = NULL; | |
2862 | fasync_helper(-1, filep, 0, &megasas_async_queue); | |
2863 | ||
2864 | return 0; | |
2865 | } | |
2866 | ||
2867 | /** | |
2868 | * megasas_mgmt_fasync - Async notifier registration from applications | |
2869 | * | |
2870 | * This function adds the calling process to a driver global queue. When an | |
2871 | * event occurs, SIGIO will be sent to all processes in this queue. | |
2872 | */ | |
2873 | static int megasas_mgmt_fasync(int fd, struct file *filep, int mode) | |
2874 | { | |
2875 | int rc; | |
2876 | ||
0b950672 | 2877 | mutex_lock(&megasas_async_queue_mutex); |
c4a3e0a5 BS |
2878 | |
2879 | rc = fasync_helper(fd, filep, mode, &megasas_async_queue); | |
2880 | ||
0b950672 | 2881 | mutex_unlock(&megasas_async_queue_mutex); |
c4a3e0a5 BS |
2882 | |
2883 | if (rc >= 0) { | |
2884 | /* For sanity check when we get ioctl */ | |
2885 | filep->private_data = filep; | |
2886 | return 0; | |
2887 | } | |
2888 | ||
2889 | printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc); | |
2890 | ||
2891 | return rc; | |
2892 | } | |
2893 | ||
2894 | /** | |
2895 | * megasas_mgmt_fw_ioctl - Issues management ioctls to FW | |
2896 | * @instance: Adapter soft state | |
2897 | * @argp: User's ioctl packet | |
2898 | */ | |
2899 | static int | |
2900 | megasas_mgmt_fw_ioctl(struct megasas_instance *instance, | |
2901 | struct megasas_iocpacket __user * user_ioc, | |
2902 | struct megasas_iocpacket *ioc) | |
2903 | { | |
2904 | struct megasas_sge32 *kern_sge32; | |
2905 | struct megasas_cmd *cmd; | |
2906 | void *kbuff_arr[MAX_IOCTL_SGE]; | |
2907 | dma_addr_t buf_handle = 0; | |
2908 | int error = 0, i; | |
2909 | void *sense = NULL; | |
2910 | dma_addr_t sense_handle; | |
2911 | u32 *sense_ptr; | |
2912 | ||
2913 | memset(kbuff_arr, 0, sizeof(kbuff_arr)); | |
2914 | ||
2915 | if (ioc->sge_count > MAX_IOCTL_SGE) { | |
2916 | printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n", | |
2917 | ioc->sge_count, MAX_IOCTL_SGE); | |
2918 | return -EINVAL; | |
2919 | } | |
2920 | ||
2921 | cmd = megasas_get_cmd(instance); | |
2922 | if (!cmd) { | |
2923 | printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n"); | |
2924 | return -ENOMEM; | |
2925 | } | |
2926 | ||
2927 | /* | |
2928 | * User's IOCTL packet has 2 frames (maximum). Copy those two | |
2929 | * frames into our cmd's frames. cmd->frame's context will get | |
2930 | * overwritten when we copy from user's frames. So set that value | |
2931 | * alone separately | |
2932 | */ | |
2933 | memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE); | |
2934 | cmd->frame->hdr.context = cmd->index; | |
2935 | ||
2936 | /* | |
2937 | * The management interface between applications and the fw uses | |
2938 | * MFI frames. E.g, RAID configuration changes, LD property changes | |
2939 | * etc are accomplishes through different kinds of MFI frames. The | |
2940 | * driver needs to care only about substituting user buffers with | |
2941 | * kernel buffers in SGLs. The location of SGL is embedded in the | |
2942 | * struct iocpacket itself. | |
2943 | */ | |
2944 | kern_sge32 = (struct megasas_sge32 *) | |
2945 | ((unsigned long)cmd->frame + ioc->sgl_off); | |
2946 | ||
2947 | /* | |
2948 | * For each user buffer, create a mirror buffer and copy in | |
2949 | */ | |
2950 | for (i = 0; i < ioc->sge_count; i++) { | |
9f35fa8a | 2951 | kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev, |
c4a3e0a5 | 2952 | ioc->sgl[i].iov_len, |
9f35fa8a | 2953 | &buf_handle, GFP_KERNEL); |
c4a3e0a5 BS |
2954 | if (!kbuff_arr[i]) { |
2955 | printk(KERN_DEBUG "megasas: Failed to alloc " | |
2956 | "kernel SGL buffer for IOCTL \n"); | |
2957 | error = -ENOMEM; | |
2958 | goto out; | |
2959 | } | |
2960 | ||
2961 | /* | |
2962 | * We don't change the dma_coherent_mask, so | |
2963 | * pci_alloc_consistent only returns 32bit addresses | |
2964 | */ | |
2965 | kern_sge32[i].phys_addr = (u32) buf_handle; | |
2966 | kern_sge32[i].length = ioc->sgl[i].iov_len; | |
2967 | ||
2968 | /* | |
2969 | * We created a kernel buffer corresponding to the | |
2970 | * user buffer. Now copy in from the user buffer | |
2971 | */ | |
2972 | if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base, | |
2973 | (u32) (ioc->sgl[i].iov_len))) { | |
2974 | error = -EFAULT; | |
2975 | goto out; | |
2976 | } | |
2977 | } | |
2978 | ||
2979 | if (ioc->sense_len) { | |
9f35fa8a SP |
2980 | sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len, |
2981 | &sense_handle, GFP_KERNEL); | |
c4a3e0a5 BS |
2982 | if (!sense) { |
2983 | error = -ENOMEM; | |
2984 | goto out; | |
2985 | } | |
2986 | ||
2987 | sense_ptr = | |
2988 | (u32 *) ((unsigned long)cmd->frame + ioc->sense_off); | |
2989 | *sense_ptr = sense_handle; | |
2990 | } | |
2991 | ||
2992 | /* | |
2993 | * Set the sync_cmd flag so that the ISR knows not to complete this | |
2994 | * cmd to the SCSI mid-layer | |
2995 | */ | |
2996 | cmd->sync_cmd = 1; | |
2997 | megasas_issue_blocked_cmd(instance, cmd); | |
2998 | cmd->sync_cmd = 0; | |
2999 | ||
3000 | /* | |
3001 | * copy out the kernel buffers to user buffers | |
3002 | */ | |
3003 | for (i = 0; i < ioc->sge_count; i++) { | |
3004 | if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i], | |
3005 | ioc->sgl[i].iov_len)) { | |
3006 | error = -EFAULT; | |
3007 | goto out; | |
3008 | } | |
3009 | } | |
3010 | ||
3011 | /* | |
3012 | * copy out the sense | |
3013 | */ | |
3014 | if (ioc->sense_len) { | |
3015 | /* | |
b70a41e0 | 3016 | * sense_ptr points to the location that has the user |
c4a3e0a5 BS |
3017 | * sense buffer address |
3018 | */ | |
b70a41e0 | 3019 | sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw + |
3020 | ioc->sense_off); | |
c4a3e0a5 | 3021 | |
b70a41e0 | 3022 | if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)), |
3023 | sense, ioc->sense_len)) { | |
b10c36a5 | 3024 | printk(KERN_ERR "megasas: Failed to copy out to user " |
3025 | "sense data\n"); | |
c4a3e0a5 BS |
3026 | error = -EFAULT; |
3027 | goto out; | |
3028 | } | |
3029 | } | |
3030 | ||
3031 | /* | |
3032 | * copy the status codes returned by the fw | |
3033 | */ | |
3034 | if (copy_to_user(&user_ioc->frame.hdr.cmd_status, | |
3035 | &cmd->frame->hdr.cmd_status, sizeof(u8))) { | |
3036 | printk(KERN_DEBUG "megasas: Error copying out cmd_status\n"); | |
3037 | error = -EFAULT; | |
3038 | } | |
3039 | ||
3040 | out: | |
3041 | if (sense) { | |
9f35fa8a | 3042 | dma_free_coherent(&instance->pdev->dev, ioc->sense_len, |
c4a3e0a5 BS |
3043 | sense, sense_handle); |
3044 | } | |
3045 | ||
3046 | for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) { | |
9f35fa8a | 3047 | dma_free_coherent(&instance->pdev->dev, |
c4a3e0a5 BS |
3048 | kern_sge32[i].length, |
3049 | kbuff_arr[i], kern_sge32[i].phys_addr); | |
3050 | } | |
3051 | ||
3052 | megasas_return_cmd(instance, cmd); | |
3053 | return error; | |
3054 | } | |
3055 | ||
3056 | static struct megasas_instance *megasas_lookup_instance(u16 host_no) | |
3057 | { | |
3058 | int i; | |
3059 | ||
3060 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { | |
3061 | ||
3062 | if ((megasas_mgmt_info.instance[i]) && | |
3063 | (megasas_mgmt_info.instance[i]->host->host_no == host_no)) | |
3064 | return megasas_mgmt_info.instance[i]; | |
3065 | } | |
3066 | ||
3067 | return NULL; | |
3068 | } | |
3069 | ||
3070 | static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg) | |
3071 | { | |
3072 | struct megasas_iocpacket __user *user_ioc = | |
3073 | (struct megasas_iocpacket __user *)arg; | |
3074 | struct megasas_iocpacket *ioc; | |
3075 | struct megasas_instance *instance; | |
3076 | int error; | |
3077 | ||
3078 | ioc = kmalloc(sizeof(*ioc), GFP_KERNEL); | |
3079 | if (!ioc) | |
3080 | return -ENOMEM; | |
3081 | ||
3082 | if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) { | |
3083 | error = -EFAULT; | |
3084 | goto out_kfree_ioc; | |
3085 | } | |
3086 | ||
3087 | instance = megasas_lookup_instance(ioc->host_no); | |
3088 | if (!instance) { | |
3089 | error = -ENODEV; | |
3090 | goto out_kfree_ioc; | |
3091 | } | |
3092 | ||
3093 | /* | |
3094 | * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds | |
3095 | */ | |
3096 | if (down_interruptible(&instance->ioctl_sem)) { | |
3097 | error = -ERESTARTSYS; | |
3098 | goto out_kfree_ioc; | |
3099 | } | |
3100 | error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc); | |
3101 | up(&instance->ioctl_sem); | |
3102 | ||
3103 | out_kfree_ioc: | |
3104 | kfree(ioc); | |
3105 | return error; | |
3106 | } | |
3107 | ||
3108 | static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg) | |
3109 | { | |
3110 | struct megasas_instance *instance; | |
3111 | struct megasas_aen aen; | |
3112 | int error; | |
3113 | ||
3114 | if (file->private_data != file) { | |
3115 | printk(KERN_DEBUG "megasas: fasync_helper was not " | |
3116 | "called first\n"); | |
3117 | return -EINVAL; | |
3118 | } | |
3119 | ||
3120 | if (copy_from_user(&aen, (void __user *)arg, sizeof(aen))) | |
3121 | return -EFAULT; | |
3122 | ||
3123 | instance = megasas_lookup_instance(aen.host_no); | |
3124 | ||
3125 | if (!instance) | |
3126 | return -ENODEV; | |
3127 | ||
e5a69e27 | 3128 | mutex_lock(&instance->aen_mutex); |
c4a3e0a5 BS |
3129 | error = megasas_register_aen(instance, aen.seq_num, |
3130 | aen.class_locale_word); | |
e5a69e27 | 3131 | mutex_unlock(&instance->aen_mutex); |
c4a3e0a5 BS |
3132 | return error; |
3133 | } | |
3134 | ||
3135 | /** | |
3136 | * megasas_mgmt_ioctl - char node ioctl entry point | |
3137 | */ | |
3138 | static long | |
3139 | megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
3140 | { | |
3141 | switch (cmd) { | |
3142 | case MEGASAS_IOC_FIRMWARE: | |
3143 | return megasas_mgmt_ioctl_fw(file, arg); | |
3144 | ||
3145 | case MEGASAS_IOC_GET_AEN: | |
3146 | return megasas_mgmt_ioctl_aen(file, arg); | |
3147 | } | |
3148 | ||
3149 | return -ENOTTY; | |
3150 | } | |
3151 | ||
3152 | #ifdef CONFIG_COMPAT | |
3153 | static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg) | |
3154 | { | |
3155 | struct compat_megasas_iocpacket __user *cioc = | |
3156 | (struct compat_megasas_iocpacket __user *)arg; | |
3157 | struct megasas_iocpacket __user *ioc = | |
3158 | compat_alloc_user_space(sizeof(struct megasas_iocpacket)); | |
3159 | int i; | |
3160 | int error = 0; | |
3161 | ||
83aabc1b JG |
3162 | if (clear_user(ioc, sizeof(*ioc))) |
3163 | return -EFAULT; | |
c4a3e0a5 BS |
3164 | |
3165 | if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) || | |
3166 | copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) || | |
3167 | copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) || | |
3168 | copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) || | |
3169 | copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) || | |
3170 | copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32))) | |
3171 | return -EFAULT; | |
3172 | ||
3173 | for (i = 0; i < MAX_IOCTL_SGE; i++) { | |
3174 | compat_uptr_t ptr; | |
3175 | ||
3176 | if (get_user(ptr, &cioc->sgl[i].iov_base) || | |
3177 | put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) || | |
3178 | copy_in_user(&ioc->sgl[i].iov_len, | |
3179 | &cioc->sgl[i].iov_len, sizeof(compat_size_t))) | |
3180 | return -EFAULT; | |
3181 | } | |
3182 | ||
3183 | error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc); | |
3184 | ||
3185 | if (copy_in_user(&cioc->frame.hdr.cmd_status, | |
3186 | &ioc->frame.hdr.cmd_status, sizeof(u8))) { | |
3187 | printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n"); | |
3188 | return -EFAULT; | |
3189 | } | |
3190 | return error; | |
3191 | } | |
3192 | ||
3193 | static long | |
3194 | megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd, | |
3195 | unsigned long arg) | |
3196 | { | |
3197 | switch (cmd) { | |
cb59aa6a SP |
3198 | case MEGASAS_IOC_FIRMWARE32: |
3199 | return megasas_mgmt_compat_ioctl_fw(file, arg); | |
c4a3e0a5 BS |
3200 | case MEGASAS_IOC_GET_AEN: |
3201 | return megasas_mgmt_ioctl_aen(file, arg); | |
3202 | } | |
3203 | ||
3204 | return -ENOTTY; | |
3205 | } | |
3206 | #endif | |
3207 | ||
3208 | /* | |
3209 | * File operations structure for management interface | |
3210 | */ | |
00977a59 | 3211 | static const struct file_operations megasas_mgmt_fops = { |
c4a3e0a5 BS |
3212 | .owner = THIS_MODULE, |
3213 | .open = megasas_mgmt_open, | |
3214 | .release = megasas_mgmt_release, | |
3215 | .fasync = megasas_mgmt_fasync, | |
3216 | .unlocked_ioctl = megasas_mgmt_ioctl, | |
3217 | #ifdef CONFIG_COMPAT | |
3218 | .compat_ioctl = megasas_mgmt_compat_ioctl, | |
3219 | #endif | |
3220 | }; | |
3221 | ||
3222 | /* | |
3223 | * PCI hotplug support registration structure | |
3224 | */ | |
3225 | static struct pci_driver megasas_pci_driver = { | |
3226 | ||
3227 | .name = "megaraid_sas", | |
3228 | .id_table = megasas_pci_table, | |
3229 | .probe = megasas_probe_one, | |
3230 | .remove = __devexit_p(megasas_detach_one), | |
31ea7088 | 3231 | .suspend = megasas_suspend, |
3232 | .resume = megasas_resume, | |
c4a3e0a5 BS |
3233 | .shutdown = megasas_shutdown, |
3234 | }; | |
3235 | ||
3236 | /* | |
3237 | * Sysfs driver attributes | |
3238 | */ | |
3239 | static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf) | |
3240 | { | |
3241 | return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n", | |
3242 | MEGASAS_VERSION); | |
3243 | } | |
3244 | ||
3245 | static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL); | |
3246 | ||
3247 | static ssize_t | |
3248 | megasas_sysfs_show_release_date(struct device_driver *dd, char *buf) | |
3249 | { | |
3250 | return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n", | |
3251 | MEGASAS_RELDATE); | |
3252 | } | |
3253 | ||
3254 | static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date, | |
3255 | NULL); | |
3256 | ||
658dcedb SP |
3257 | static ssize_t |
3258 | megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf) | |
3259 | { | |
ad84db2e | 3260 | return sprintf(buf, "%u\n", megasas_dbg_lvl); |
658dcedb SP |
3261 | } |
3262 | ||
3263 | static ssize_t | |
3264 | megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count) | |
3265 | { | |
3266 | int retval = count; | |
3267 | if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){ | |
3268 | printk(KERN_ERR "megasas: could not set dbg_lvl\n"); | |
3269 | retval = -EINVAL; | |
3270 | } | |
3271 | return retval; | |
3272 | } | |
3273 | ||
3274 | static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUGO, megasas_sysfs_show_dbg_lvl, | |
ad84db2e | 3275 | megasas_sysfs_set_dbg_lvl); |
3276 | ||
3277 | static ssize_t | |
3278 | megasas_sysfs_show_poll_mode_io(struct device_driver *dd, char *buf) | |
3279 | { | |
3280 | return sprintf(buf, "%u\n", poll_mode_io); | |
3281 | } | |
3282 | ||
3283 | static ssize_t | |
3284 | megasas_sysfs_set_poll_mode_io(struct device_driver *dd, | |
3285 | const char *buf, size_t count) | |
3286 | { | |
3287 | int retval = count; | |
3288 | int tmp = poll_mode_io; | |
3289 | int i; | |
3290 | struct megasas_instance *instance; | |
3291 | ||
3292 | if (sscanf(buf, "%u", &poll_mode_io) < 1) { | |
3293 | printk(KERN_ERR "megasas: could not set poll_mode_io\n"); | |
3294 | retval = -EINVAL; | |
3295 | } | |
3296 | ||
3297 | /* | |
3298 | * Check if poll_mode_io is already set or is same as previous value | |
3299 | */ | |
3300 | if ((tmp && poll_mode_io) || (tmp == poll_mode_io)) | |
3301 | goto out; | |
3302 | ||
3303 | if (poll_mode_io) { | |
3304 | /* | |
3305 | * Start timers for all adapters | |
3306 | */ | |
3307 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { | |
3308 | instance = megasas_mgmt_info.instance[i]; | |
3309 | if (instance) { | |
3310 | megasas_start_timer(instance, | |
3311 | &instance->io_completion_timer, | |
3312 | megasas_io_completion_timer, | |
3313 | MEGASAS_COMPLETION_TIMER_INTERVAL); | |
3314 | } | |
3315 | } | |
3316 | } else { | |
3317 | /* | |
3318 | * Delete timers for all adapters | |
3319 | */ | |
3320 | for (i = 0; i < megasas_mgmt_info.max_index; i++) { | |
3321 | instance = megasas_mgmt_info.instance[i]; | |
3322 | if (instance) | |
3323 | del_timer_sync(&instance->io_completion_timer); | |
3324 | } | |
3325 | } | |
3326 | ||
3327 | out: | |
3328 | return retval; | |
3329 | } | |
3330 | ||
3331 | static DRIVER_ATTR(poll_mode_io, S_IRUGO|S_IWUGO, | |
3332 | megasas_sysfs_show_poll_mode_io, | |
3333 | megasas_sysfs_set_poll_mode_io); | |
658dcedb | 3334 | |
c4a3e0a5 BS |
3335 | /** |
3336 | * megasas_init - Driver load entry point | |
3337 | */ | |
3338 | static int __init megasas_init(void) | |
3339 | { | |
3340 | int rval; | |
3341 | ||
3342 | /* | |
3343 | * Announce driver version and other information | |
3344 | */ | |
3345 | printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION, | |
3346 | MEGASAS_EXT_VERSION); | |
3347 | ||
3348 | memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info)); | |
3349 | ||
3350 | /* | |
3351 | * Register character device node | |
3352 | */ | |
3353 | rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops); | |
3354 | ||
3355 | if (rval < 0) { | |
3356 | printk(KERN_DEBUG "megasas: failed to open device node\n"); | |
3357 | return rval; | |
3358 | } | |
3359 | ||
3360 | megasas_mgmt_majorno = rval; | |
3361 | ||
3362 | /* | |
3363 | * Register ourselves as PCI hotplug module | |
3364 | */ | |
4041b9cd | 3365 | rval = pci_register_driver(&megasas_pci_driver); |
c4a3e0a5 BS |
3366 | |
3367 | if (rval) { | |
3368 | printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n"); | |
83aabc1b JG |
3369 | goto err_pcidrv; |
3370 | } | |
3371 | ||
3372 | rval = driver_create_file(&megasas_pci_driver.driver, | |
3373 | &driver_attr_version); | |
3374 | if (rval) | |
3375 | goto err_dcf_attr_ver; | |
3376 | rval = driver_create_file(&megasas_pci_driver.driver, | |
3377 | &driver_attr_release_date); | |
3378 | if (rval) | |
3379 | goto err_dcf_rel_date; | |
3380 | rval = driver_create_file(&megasas_pci_driver.driver, | |
3381 | &driver_attr_dbg_lvl); | |
3382 | if (rval) | |
3383 | goto err_dcf_dbg_lvl; | |
ad84db2e | 3384 | rval = driver_create_file(&megasas_pci_driver.driver, |
3385 | &driver_attr_poll_mode_io); | |
3386 | if (rval) | |
3387 | goto err_dcf_poll_mode_io; | |
c4a3e0a5 BS |
3388 | |
3389 | return rval; | |
ad84db2e | 3390 | |
3391 | err_dcf_poll_mode_io: | |
3392 | driver_remove_file(&megasas_pci_driver.driver, | |
3393 | &driver_attr_dbg_lvl); | |
83aabc1b JG |
3394 | err_dcf_dbg_lvl: |
3395 | driver_remove_file(&megasas_pci_driver.driver, | |
3396 | &driver_attr_release_date); | |
3397 | err_dcf_rel_date: | |
3398 | driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version); | |
3399 | err_dcf_attr_ver: | |
3400 | pci_unregister_driver(&megasas_pci_driver); | |
3401 | err_pcidrv: | |
3402 | unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); | |
3403 | return rval; | |
c4a3e0a5 BS |
3404 | } |
3405 | ||
3406 | /** | |
3407 | * megasas_exit - Driver unload entry point | |
3408 | */ | |
3409 | static void __exit megasas_exit(void) | |
3410 | { | |
ad84db2e | 3411 | driver_remove_file(&megasas_pci_driver.driver, |
3412 | &driver_attr_poll_mode_io); | |
658dcedb SP |
3413 | driver_remove_file(&megasas_pci_driver.driver, |
3414 | &driver_attr_dbg_lvl); | |
83aabc1b JG |
3415 | driver_remove_file(&megasas_pci_driver.driver, |
3416 | &driver_attr_release_date); | |
3417 | driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version); | |
c4a3e0a5 BS |
3418 | |
3419 | pci_unregister_driver(&megasas_pci_driver); | |
3420 | unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); | |
3421 | } | |
3422 | ||
3423 | module_init(megasas_init); | |
3424 | module_exit(megasas_exit); |