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Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001/*
2 *
3 * Linux MegaRAID driver for SAS based RAID controllers
4 *
5 * Copyright (c) 2003-2005 LSI Logic Corporation.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * FILE : megaraid_sas.c
Sumant Patro2a3681e2006-10-03 13:19:21 -070013 * Version : v00.00.03.05
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -040014 *
15 * Authors:
16 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
17 * Sumant Patro <Sumant.Patro@lsil.com>
18 *
19 * List of supported controllers
20 *
21 * OEM Product Name VID DID SSVID SSID
22 * --- ------------ --- --- ---- ----
23 */
24
25#include <linux/kernel.h>
26#include <linux/types.h>
27#include <linux/pci.h>
28#include <linux/list.h>
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -040029#include <linux/moduleparam.h>
30#include <linux/module.h>
31#include <linux/spinlock.h>
32#include <linux/interrupt.h>
33#include <linux/delay.h>
34#include <linux/uio.h>
35#include <asm/uaccess.h>
Al Viro43399232005-10-04 17:36:04 +010036#include <linux/fs.h>
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -040037#include <linux/compat.h>
Arjan van de Ven0b950672006-01-11 13:16:10 +010038#include <linux/mutex.h>
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -040039
40#include <scsi/scsi.h>
41#include <scsi/scsi_cmnd.h>
42#include <scsi/scsi_device.h>
43#include <scsi/scsi_host.h>
44#include "megaraid_sas.h"
45
46MODULE_LICENSE("GPL");
47MODULE_VERSION(MEGASAS_VERSION);
48MODULE_AUTHOR("sreenivas.bagalkote@lsil.com");
49MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver");
50
51/*
52 * PCI ID table for all supported controllers
53 */
54static struct pci_device_id megasas_pci_table[] = {
55
Henrik Kretzschmarf3d72712006-08-15 11:17:21 +020056 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
57 /* xscale IOP */
58 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
59 /* ppc IOP */
60 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
61 /* xscale IOP, vega */
62 {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
63 /* xscale IOP */
64 {}
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -040065};
66
67MODULE_DEVICE_TABLE(pci, megasas_pci_table);
68
69static int megasas_mgmt_majorno;
70static struct megasas_mgmt_info megasas_mgmt_info;
71static struct fasync_struct *megasas_async_queue;
Arjan van de Ven0b950672006-01-11 13:16:10 +010072static DEFINE_MUTEX(megasas_async_queue_mutex);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -040073
Sumant Patro658dced2006-10-03 13:09:14 -070074static u32 megasas_dbg_lvl;
75
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -040076/**
77 * megasas_get_cmd - Get a command from the free pool
78 * @instance: Adapter soft state
79 *
80 * Returns a free command from the pool
81 */
Arjan van de Ven858119e2006-01-14 13:20:43 -080082static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -040083 *instance)
84{
85 unsigned long flags;
86 struct megasas_cmd *cmd = NULL;
87
88 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
89
90 if (!list_empty(&instance->cmd_pool)) {
91 cmd = list_entry((&instance->cmd_pool)->next,
92 struct megasas_cmd, list);
93 list_del_init(&cmd->list);
94 } else {
95 printk(KERN_ERR "megasas: Command pool empty!\n");
96 }
97
98 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
99 return cmd;
100}
101
102/**
103 * megasas_return_cmd - Return a cmd to free command pool
104 * @instance: Adapter soft state
105 * @cmd: Command packet to be returned to free command pool
106 */
107static inline void
108megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
109{
110 unsigned long flags;
111
112 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
113
114 cmd->scmd = NULL;
115 list_add_tail(&cmd->list, &instance->cmd_pool);
116
117 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
118}
119
Sumant Patro1341c932006-01-25 12:02:40 -0800120
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400121/**
Sumant Patro1341c932006-01-25 12:02:40 -0800122* The following functions are defined for xscale
123* (deviceid : 1064R, PERC5) controllers
124*/
125
126/**
127 * megasas_enable_intr_xscale - Enables interrupts
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400128 * @regs: MFI register set
129 */
130static inline void
Sumant Patro1341c932006-01-25 12:02:40 -0800131megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs)
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400132{
133 writel(1, &(regs)->outbound_intr_mask);
134
135 /* Dummy readl to force pci flush */
136 readl(&regs->outbound_intr_mask);
137}
138
139/**
Sumant Patrob274cab2006-10-03 12:52:12 -0700140 * megasas_disable_intr_xscale -Disables interrupt
141 * @regs: MFI register set
142 */
143static inline void
144megasas_disable_intr_xscale(struct megasas_register_set __iomem * regs)
145{
146 u32 mask = 0x1f;
147 writel(mask, &regs->outbound_intr_mask);
148 /* Dummy readl to force pci flush */
149 readl(&regs->outbound_intr_mask);
150}
151
152/**
Sumant Patro1341c932006-01-25 12:02:40 -0800153 * megasas_read_fw_status_reg_xscale - returns the current FW status value
154 * @regs: MFI register set
155 */
156static u32
157megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
158{
159 return readl(&(regs)->outbound_msg_0);
160}
161/**
162 * megasas_clear_interrupt_xscale - Check & clear interrupt
163 * @regs: MFI register set
164 */
165static int
166megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
167{
168 u32 status;
169 /*
170 * Check if it is our interrupt
171 */
172 status = readl(&regs->outbound_intr_status);
173
174 if (!(status & MFI_OB_INTR_STATUS_MASK)) {
175 return 1;
176 }
177
178 /*
179 * Clear the interrupt by writing back the same value
180 */
181 writel(status, &regs->outbound_intr_status);
182
183 return 0;
184}
185
186/**
187 * megasas_fire_cmd_xscale - Sends command to the FW
188 * @frame_phys_addr : Physical address of cmd
189 * @frame_count : Number of frames for the command
190 * @regs : MFI register set
191 */
192static inline void
193megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs)
194{
195 writel((frame_phys_addr >> 3)|(frame_count),
196 &(regs)->inbound_queue_port);
197}
198
199static struct megasas_instance_template megasas_instance_template_xscale = {
200
201 .fire_cmd = megasas_fire_cmd_xscale,
202 .enable_intr = megasas_enable_intr_xscale,
Sumant Patrob274cab2006-10-03 12:52:12 -0700203 .disable_intr = megasas_disable_intr_xscale,
Sumant Patro1341c932006-01-25 12:02:40 -0800204 .clear_intr = megasas_clear_intr_xscale,
205 .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
206};
207
208/**
209* This is the end of set of functions & definitions specific
210* to xscale (deviceid : 1064R, PERC5) controllers
211*/
212
213/**
Sumant Patrof9876f02006-02-03 15:34:35 -0800214* The following functions are defined for ppc (deviceid : 0x60)
215* controllers
216*/
217
218/**
219 * megasas_enable_intr_ppc - Enables interrupts
220 * @regs: MFI register set
221 */
222static inline void
223megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs)
224{
225 writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
226
227 writel(~0x80000004, &(regs)->outbound_intr_mask);
228
229 /* Dummy readl to force pci flush */
230 readl(&regs->outbound_intr_mask);
231}
232
233/**
Sumant Patrob274cab2006-10-03 12:52:12 -0700234 * megasas_disable_intr_ppc - Disable interrupt
235 * @regs: MFI register set
236 */
237static inline void
238megasas_disable_intr_ppc(struct megasas_register_set __iomem * regs)
239{
240 u32 mask = 0xFFFFFFFF;
241 writel(mask, &regs->outbound_intr_mask);
242 /* Dummy readl to force pci flush */
243 readl(&regs->outbound_intr_mask);
244}
245
246/**
Sumant Patrof9876f02006-02-03 15:34:35 -0800247 * megasas_read_fw_status_reg_ppc - returns the current FW status value
248 * @regs: MFI register set
249 */
250static u32
251megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
252{
253 return readl(&(regs)->outbound_scratch_pad);
254}
255
256/**
257 * megasas_clear_interrupt_ppc - Check & clear interrupt
258 * @regs: MFI register set
259 */
260static int
261megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
262{
263 u32 status;
264 /*
265 * Check if it is our interrupt
266 */
267 status = readl(&regs->outbound_intr_status);
268
269 if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) {
270 return 1;
271 }
272
273 /*
274 * Clear the interrupt by writing back the same value
275 */
276 writel(status, &regs->outbound_doorbell_clear);
277
278 return 0;
279}
280/**
281 * megasas_fire_cmd_ppc - Sends command to the FW
282 * @frame_phys_addr : Physical address of cmd
283 * @frame_count : Number of frames for the command
284 * @regs : MFI register set
285 */
286static inline void
287megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs)
288{
289 writel((frame_phys_addr | (frame_count<<1))|1,
290 &(regs)->inbound_queue_port);
291}
292
293static struct megasas_instance_template megasas_instance_template_ppc = {
294
295 .fire_cmd = megasas_fire_cmd_ppc,
296 .enable_intr = megasas_enable_intr_ppc,
Sumant Patrob274cab2006-10-03 12:52:12 -0700297 .disable_intr = megasas_disable_intr_ppc,
Sumant Patrof9876f02006-02-03 15:34:35 -0800298 .clear_intr = megasas_clear_intr_ppc,
299 .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
300};
301
302/**
303* This is the end of set of functions & definitions
304* specific to ppc (deviceid : 0x60) controllers
305*/
306
307/**
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400308 * megasas_issue_polled - Issues a polling command
309 * @instance: Adapter soft state
310 * @cmd: Command packet to be issued
311 *
312 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
313 */
314static int
315megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
316{
317 int i;
318 u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
319
320 struct megasas_header *frame_hdr = &cmd->frame->hdr;
321
322 frame_hdr->cmd_status = 0xFF;
323 frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
324
325 /*
326 * Issue the frame using inbound queue port
327 */
Sumant Patro1341c932006-01-25 12:02:40 -0800328 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400329
330 /*
331 * Wait for cmd_status to change
332 */
333 for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) {
334 rmb();
335 msleep(1);
336 }
337
338 if (frame_hdr->cmd_status == 0xff)
339 return -ETIME;
340
341 return 0;
342}
343
344/**
345 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
346 * @instance: Adapter soft state
347 * @cmd: Command to be issued
348 *
349 * This function waits on an event for the command to be returned from ISR.
Sumant Patro2a3681e2006-10-03 13:19:21 -0700350 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400351 * Used to issue ioctl commands.
352 */
353static int
354megasas_issue_blocked_cmd(struct megasas_instance *instance,
355 struct megasas_cmd *cmd)
356{
357 cmd->cmd_status = ENODATA;
358
Sumant Patro1341c932006-01-25 12:02:40 -0800359 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400360
Sumant Patro2a3681e2006-10-03 13:19:21 -0700361 wait_event_timeout(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA),
362 MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400363
364 return 0;
365}
366
367/**
368 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
369 * @instance: Adapter soft state
370 * @cmd_to_abort: Previously issued cmd to be aborted
371 *
372 * MFI firmware can abort previously issued AEN comamnd (automatic event
373 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
Sumant Patro2a3681e2006-10-03 13:19:21 -0700374 * cmd and waits for return status.
375 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400376 */
377static int
378megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
379 struct megasas_cmd *cmd_to_abort)
380{
381 struct megasas_cmd *cmd;
382 struct megasas_abort_frame *abort_fr;
383
384 cmd = megasas_get_cmd(instance);
385
386 if (!cmd)
387 return -1;
388
389 abort_fr = &cmd->frame->abort;
390
391 /*
392 * Prepare and issue the abort frame
393 */
394 abort_fr->cmd = MFI_CMD_ABORT;
395 abort_fr->cmd_status = 0xFF;
396 abort_fr->flags = 0;
397 abort_fr->abort_context = cmd_to_abort->index;
398 abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
399 abort_fr->abort_mfi_phys_addr_hi = 0;
400
401 cmd->sync_cmd = 1;
402 cmd->cmd_status = 0xFF;
403
Sumant Patro1341c932006-01-25 12:02:40 -0800404 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400405
406 /*
407 * Wait for this cmd to complete
408 */
Sumant Patro2a3681e2006-10-03 13:19:21 -0700409 wait_event_timeout(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF),
410 MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400411
412 megasas_return_cmd(instance, cmd);
413 return 0;
414}
415
416/**
417 * megasas_make_sgl32 - Prepares 32-bit SGL
418 * @instance: Adapter soft state
419 * @scp: SCSI command from the mid-layer
420 * @mfi_sgl: SGL to be filled in
421 *
422 * If successful, this function returns the number of SG elements. Otherwise,
423 * it returnes -1.
424 */
Arjan van de Ven858119e2006-01-14 13:20:43 -0800425static int
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400426megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
427 union megasas_sgl *mfi_sgl)
428{
429 int i;
430 int sge_count;
431 struct scatterlist *os_sgl;
432
433 /*
434 * Return 0 if there is no data transfer
435 */
436 if (!scp->request_buffer || !scp->request_bufflen)
437 return 0;
438
439 if (!scp->use_sg) {
440 mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev,
441 scp->
442 request_buffer,
443 scp->
444 request_bufflen,
445 scp->
446 sc_data_direction);
447 mfi_sgl->sge32[0].length = scp->request_bufflen;
448
449 return 1;
450 }
451
452 os_sgl = (struct scatterlist *)scp->request_buffer;
453 sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
454 scp->sc_data_direction);
455
456 for (i = 0; i < sge_count; i++, os_sgl++) {
457 mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
458 mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
459 }
460
461 return sge_count;
462}
463
464/**
465 * megasas_make_sgl64 - Prepares 64-bit SGL
466 * @instance: Adapter soft state
467 * @scp: SCSI command from the mid-layer
468 * @mfi_sgl: SGL to be filled in
469 *
470 * If successful, this function returns the number of SG elements. Otherwise,
471 * it returnes -1.
472 */
Arjan van de Ven858119e2006-01-14 13:20:43 -0800473static int
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400474megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
475 union megasas_sgl *mfi_sgl)
476{
477 int i;
478 int sge_count;
479 struct scatterlist *os_sgl;
480
481 /*
482 * Return 0 if there is no data transfer
483 */
484 if (!scp->request_buffer || !scp->request_bufflen)
485 return 0;
486
487 if (!scp->use_sg) {
488 mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev,
489 scp->
490 request_buffer,
491 scp->
492 request_bufflen,
493 scp->
494 sc_data_direction);
495
496 mfi_sgl->sge64[0].length = scp->request_bufflen;
497
498 return 1;
499 }
500
501 os_sgl = (struct scatterlist *)scp->request_buffer;
502 sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
503 scp->sc_data_direction);
504
505 for (i = 0; i < sge_count; i++, os_sgl++) {
506 mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
507 mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
508 }
509
510 return sge_count;
511}
512
Sumant Patrob1df99d2006-10-03 12:40:47 -0700513 /**
514 * megasas_get_frame_count - Computes the number of frames
515 * @sge_count : number of sg elements
516 *
517 * Returns the number of frames required for numnber of sge's (sge_count)
518 */
519
520u32 megasas_get_frame_count(u8 sge_count)
521{
522 int num_cnt;
523 int sge_bytes;
524 u32 sge_sz;
525 u32 frame_count=0;
526
527 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
528 sizeof(struct megasas_sge32);
529
530 /*
531 * Main frame can contain 2 SGEs for 64-bit SGLs and
532 * 3 SGEs for 32-bit SGLs
533 */
534 if (IS_DMA64)
535 num_cnt = sge_count - 2;
536 else
537 num_cnt = sge_count - 3;
538
539 if(num_cnt>0){
540 sge_bytes = sge_sz * num_cnt;
541
542 frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
543 ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
544 }
545 /* Main frame */
546 frame_count +=1;
547
548 if (frame_count > 7)
549 frame_count = 8;
550 return frame_count;
551}
552
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400553/**
554 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
555 * @instance: Adapter soft state
556 * @scp: SCSI command
557 * @cmd: Command to be prepared in
558 *
559 * This function prepares CDB commands. These are typcially pass-through
560 * commands to the devices.
561 */
Arjan van de Ven858119e2006-01-14 13:20:43 -0800562static int
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400563megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
564 struct megasas_cmd *cmd)
565{
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400566 u32 is_logical;
567 u32 device_id;
568 u16 flags = 0;
569 struct megasas_pthru_frame *pthru;
570
571 is_logical = MEGASAS_IS_LOGICAL(scp);
572 device_id = MEGASAS_DEV_INDEX(instance, scp);
573 pthru = (struct megasas_pthru_frame *)cmd->frame;
574
575 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
576 flags = MFI_FRAME_DIR_WRITE;
577 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
578 flags = MFI_FRAME_DIR_READ;
579 else if (scp->sc_data_direction == PCI_DMA_NONE)
580 flags = MFI_FRAME_DIR_NONE;
581
582 /*
583 * Prepare the DCDB frame
584 */
585 pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
586 pthru->cmd_status = 0x0;
587 pthru->scsi_status = 0x0;
588 pthru->target_id = device_id;
589 pthru->lun = scp->device->lun;
590 pthru->cdb_len = scp->cmd_len;
591 pthru->timeout = 0;
592 pthru->flags = flags;
593 pthru->data_xfer_len = scp->request_bufflen;
594
595 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
596
597 /*
598 * Construct SGL
599 */
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400600 if (IS_DMA64) {
601 pthru->flags |= MFI_FRAME_SGL64;
602 pthru->sge_count = megasas_make_sgl64(instance, scp,
603 &pthru->sgl);
604 } else
605 pthru->sge_count = megasas_make_sgl32(instance, scp,
606 &pthru->sgl);
607
608 /*
609 * Sense info specific
610 */
611 pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
612 pthru->sense_buf_phys_addr_hi = 0;
613 pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
614
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400615 /*
616 * Compute the total number of frames this command consumes. FW uses
617 * this number to pull sufficient number of frames from host memory.
618 */
Sumant Patrob1df99d2006-10-03 12:40:47 -0700619 cmd->frame_count = megasas_get_frame_count(pthru->sge_count);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400620
621 return cmd->frame_count;
622}
623
624/**
625 * megasas_build_ldio - Prepares IOs to logical devices
626 * @instance: Adapter soft state
627 * @scp: SCSI command
628 * @cmd: Command to to be prepared
629 *
630 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
631 */
Arjan van de Ven858119e2006-01-14 13:20:43 -0800632static int
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400633megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
634 struct megasas_cmd *cmd)
635{
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400636 u32 device_id;
637 u8 sc = scp->cmnd[0];
638 u16 flags = 0;
639 struct megasas_io_frame *ldio;
640
641 device_id = MEGASAS_DEV_INDEX(instance, scp);
642 ldio = (struct megasas_io_frame *)cmd->frame;
643
644 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
645 flags = MFI_FRAME_DIR_WRITE;
646 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
647 flags = MFI_FRAME_DIR_READ;
648
649 /*
Sumant Patrob1df99d2006-10-03 12:40:47 -0700650 * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400651 */
652 ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
653 ldio->cmd_status = 0x0;
654 ldio->scsi_status = 0x0;
655 ldio->target_id = device_id;
656 ldio->timeout = 0;
657 ldio->reserved_0 = 0;
658 ldio->pad_0 = 0;
659 ldio->flags = flags;
660 ldio->start_lba_hi = 0;
661 ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
662
663 /*
664 * 6-byte READ(0x08) or WRITE(0x0A) cdb
665 */
666 if (scp->cmd_len == 6) {
667 ldio->lba_count = (u32) scp->cmnd[4];
668 ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
669 ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
670
671 ldio->start_lba_lo &= 0x1FFFFF;
672 }
673
674 /*
675 * 10-byte READ(0x28) or WRITE(0x2A) cdb
676 */
677 else if (scp->cmd_len == 10) {
678 ldio->lba_count = (u32) scp->cmnd[8] |
679 ((u32) scp->cmnd[7] << 8);
680 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
681 ((u32) scp->cmnd[3] << 16) |
682 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
683 }
684
685 /*
686 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
687 */
688 else if (scp->cmd_len == 12) {
689 ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
690 ((u32) scp->cmnd[7] << 16) |
691 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
692
693 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
694 ((u32) scp->cmnd[3] << 16) |
695 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
696 }
697
698 /*
699 * 16-byte READ(0x88) or WRITE(0x8A) cdb
700 */
701 else if (scp->cmd_len == 16) {
702 ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
703 ((u32) scp->cmnd[11] << 16) |
704 ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
705
706 ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
707 ((u32) scp->cmnd[7] << 16) |
708 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
709
710 ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
711 ((u32) scp->cmnd[3] << 16) |
712 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
713
714 }
715
716 /*
717 * Construct SGL
718 */
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400719 if (IS_DMA64) {
720 ldio->flags |= MFI_FRAME_SGL64;
721 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
722 } else
723 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
724
725 /*
726 * Sense info specific
727 */
728 ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
729 ldio->sense_buf_phys_addr_hi = 0;
730 ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
731
Sumant Patrob1df99d2006-10-03 12:40:47 -0700732 /*
733 * Compute the total number of frames this command consumes. FW uses
734 * this number to pull sufficient number of frames from host memory.
735 */
736 cmd->frame_count = megasas_get_frame_count(ldio->sge_count);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400737
738 return cmd->frame_count;
739}
740
741/**
Sumant Patrocb59aa62006-01-25 11:53:25 -0800742 * megasas_is_ldio - Checks if the cmd is for logical drive
743 * @scmd: SCSI command
744 *
745 * Called by megasas_queue_command to find out if the command to be queued
746 * is a logical drive command
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400747 */
Sumant Patrocb59aa62006-01-25 11:53:25 -0800748static inline int megasas_is_ldio(struct scsi_cmnd *cmd)
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400749{
Sumant Patrocb59aa62006-01-25 11:53:25 -0800750 if (!MEGASAS_IS_LOGICAL(cmd))
751 return 0;
752 switch (cmd->cmnd[0]) {
753 case READ_10:
754 case WRITE_10:
755 case READ_12:
756 case WRITE_12:
757 case READ_6:
758 case WRITE_6:
759 case READ_16:
760 case WRITE_16:
761 return 1;
762 default:
763 return 0;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400764 }
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400765}
766
Sumant Patro658dced2006-10-03 13:09:14 -0700767 /**
768 * megasas_dump_pending_frames - Dumps the frame address of all pending cmds
769 * in FW
770 * @instance: Adapter soft state
771 */
772static inline void
773megasas_dump_pending_frames(struct megasas_instance *instance)
774{
775 struct megasas_cmd *cmd;
776 int i,n;
777 union megasas_sgl *mfi_sgl;
778 struct megasas_io_frame *ldio;
779 struct megasas_pthru_frame *pthru;
780 u32 sgcount;
781 u32 max_cmd = instance->max_fw_cmds;
782
783 printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
784 printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
785 if (IS_DMA64)
786 printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
787 else
788 printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
789
790 printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
791 for (i = 0; i < max_cmd; i++) {
792 cmd = instance->cmd_list[i];
793 if(!cmd->scmd)
794 continue;
795 printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
796 if (megasas_is_ldio(cmd->scmd)){
797 ldio = (struct megasas_io_frame *)cmd->frame;
798 mfi_sgl = &ldio->sgl;
799 sgcount = ldio->sge_count;
800 printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no, cmd->frame_count,ldio->cmd,ldio->target_id, ldio->start_lba_lo,ldio->start_lba_hi,ldio->sense_buf_phys_addr_lo,sgcount);
801 }
802 else {
803 pthru = (struct megasas_pthru_frame *) cmd->frame;
804 mfi_sgl = &pthru->sgl;
805 sgcount = pthru->sge_count;
806 printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no,cmd->frame_count,pthru->cmd,pthru->target_id,pthru->lun,pthru->cdb_len , pthru->data_xfer_len,pthru->sense_buf_phys_addr_lo,sgcount);
807 }
808 if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
809 for (n = 0; n < sgcount; n++){
810 if (IS_DMA64)
811 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%08lx ",mfi_sgl->sge64[n].length , (unsigned long)mfi_sgl->sge64[n].phys_addr) ;
812 else
813 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl->sge32[n].length , mfi_sgl->sge32[n].phys_addr) ;
814 }
815 }
816 printk(KERN_ERR "\n");
817 } /*for max_cmd*/
818 printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
819 for (i = 0; i < max_cmd; i++) {
820
821 cmd = instance->cmd_list[i];
822
823 if(cmd->sync_cmd == 1){
824 printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
825 }
826 }
827 printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
828}
829
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400830/**
831 * megasas_queue_command - Queue entry point
832 * @scmd: SCSI command to be queued
833 * @done: Callback entry point
834 */
835static int
836megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
837{
838 u32 frame_count;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400839 struct megasas_cmd *cmd;
840 struct megasas_instance *instance;
841
842 instance = (struct megasas_instance *)
843 scmd->device->host->hostdata;
844 scmd->scsi_done = done;
845 scmd->result = 0;
846
Sumant Patrocb59aa62006-01-25 11:53:25 -0800847 if (MEGASAS_IS_LOGICAL(scmd) &&
848 (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
849 scmd->result = DID_BAD_TARGET << 16;
850 goto out_done;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400851 }
852
Sumant Patrocb59aa62006-01-25 11:53:25 -0800853 cmd = megasas_get_cmd(instance);
854 if (!cmd)
855 return SCSI_MLQUEUE_HOST_BUSY;
856
857 /*
858 * Logical drive command
859 */
860 if (megasas_is_ldio(scmd))
861 frame_count = megasas_build_ldio(instance, scmd, cmd);
862 else
863 frame_count = megasas_build_dcdb(instance, scmd, cmd);
864
865 if (!frame_count)
866 goto out_return_cmd;
867
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400868 cmd->scmd = scmd;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400869
870 /*
871 * Issue the command to the FW
872 */
Sumant Patroe4a082c2006-05-30 12:03:37 -0700873 atomic_inc(&instance->fw_outstanding);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400874
Sumant Patro1341c932006-01-25 12:02:40 -0800875 instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400876
877 return 0;
Sumant Patrocb59aa62006-01-25 11:53:25 -0800878
879 out_return_cmd:
880 megasas_return_cmd(instance, cmd);
881 out_done:
882 done(scmd);
883 return 0;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400884}
885
Christoph Hellwig147aab62006-02-17 12:13:48 +0100886static 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;
Christoph Hellwige5b3a652006-03-10 17:08:57 +0100897
898 /*
899 * The RAID firmware may require extended timeouts.
900 */
901 if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
902 sdev->timeout = 90 * HZ;
Christoph Hellwig147aab62006-02-17 12:13:48 +0100903 return 0;
904}
905
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400906/**
907 * megasas_wait_for_outstanding - Wait for all outstanding cmds
908 * @instance: Adapter soft state
909 *
910 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
911 * complete all its outstanding commands. Returns error if one or more IOs
912 * are pending after this time period. It also marks the controller dead.
913 */
914static int megasas_wait_for_outstanding(struct megasas_instance *instance)
915{
916 int i;
917 u32 wait_time = MEGASAS_RESET_WAIT_TIME;
918
919 for (i = 0; i < wait_time; i++) {
920
Sumant Patroe4a082c2006-05-30 12:03:37 -0700921 int outstanding = atomic_read(&instance->fw_outstanding);
922
923 if (!outstanding)
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400924 break;
925
926 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
927 printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
Sumant Patroe4a082c2006-05-30 12:03:37 -0700928 "commands to complete\n",i,outstanding);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400929 }
930
931 msleep(1000);
932 }
933
Sumant Patroe4a082c2006-05-30 12:03:37 -0700934 if (atomic_read(&instance->fw_outstanding)) {
Sumant Patroe3bbff92006-10-03 12:28:49 -0700935 /*
936 * Send signal to FW to stop processing any pending cmds.
937 * The controller will be taken offline by the OS now.
938 */
939 writel(MFI_STOP_ADP,
940 &instance->reg_set->inbound_doorbell);
Sumant Patro658dced2006-10-03 13:09:14 -0700941 megasas_dump_pending_frames(instance);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400942 instance->hw_crit_error = 1;
943 return FAILED;
944 }
945
946 return SUCCESS;
947}
948
949/**
950 * megasas_generic_reset - Generic reset routine
951 * @scmd: Mid-layer SCSI command
952 *
953 * This routine implements a generic reset handler for device, bus and host
954 * reset requests. Device, bus and host specific reset handlers can use this
955 * function after they do their specific tasks.
956 */
957static int megasas_generic_reset(struct scsi_cmnd *scmd)
958{
959 int ret_val;
960 struct megasas_instance *instance;
961
962 instance = (struct megasas_instance *)scmd->device->host->hostdata;
963
Jeff Garzik017560f2005-10-24 18:04:36 -0400964 scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n",
965 scmd->serial_number, scmd->cmnd[0]);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400966
967 if (instance->hw_crit_error) {
968 printk(KERN_ERR "megasas: cannot recover from previous reset "
969 "failures\n");
970 return FAILED;
971 }
972
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400973 ret_val = megasas_wait_for_outstanding(instance);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400974 if (ret_val == SUCCESS)
975 printk(KERN_NOTICE "megasas: reset successful \n");
976 else
977 printk(KERN_ERR "megasas: failed to do reset\n");
978
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400979 return ret_val;
980}
981
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -0400982/**
983 * megasas_reset_device - Device reset handler entry point
984 */
985static int megasas_reset_device(struct scsi_cmnd *scmd)
986{
987 int ret;
988
989 /*
990 * First wait for all commands to complete
991 */
992 ret = megasas_generic_reset(scmd);
993
994 return ret;
995}
996
997/**
998 * megasas_reset_bus_host - Bus & host reset handler entry point
999 */
1000static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
1001{
1002 int ret;
1003
1004 /*
Uwe Zeisberger80682fa2006-03-22 00:21:33 +01001005 * First wait for all commands to complete
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001006 */
1007 ret = megasas_generic_reset(scmd);
1008
1009 return ret;
1010}
1011
1012/**
1013 * megasas_service_aen - Processes an event notification
1014 * @instance: Adapter soft state
1015 * @cmd: AEN command completed by the ISR
1016 *
1017 * For AEN, driver sends a command down to FW that is held by the FW till an
1018 * event occurs. When an event of interest occurs, FW completes the command
1019 * that it was previously holding.
1020 *
1021 * This routines sends SIGIO signal to processes that have registered with the
1022 * driver for AEN.
1023 */
1024static void
1025megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
1026{
1027 /*
1028 * Don't signal app if it is just an aborted previously registered aen
1029 */
1030 if (!cmd->abort_aen)
1031 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
1032 else
1033 cmd->abort_aen = 0;
1034
1035 instance->aen_cmd = NULL;
1036 megasas_return_cmd(instance, cmd);
1037}
1038
1039/*
1040 * Scsi host template for megaraid_sas driver
1041 */
1042static struct scsi_host_template megasas_template = {
1043
1044 .module = THIS_MODULE,
1045 .name = "LSI Logic SAS based MegaRAID driver",
1046 .proc_name = "megaraid_sas",
Christoph Hellwig147aab62006-02-17 12:13:48 +01001047 .slave_configure = megasas_slave_configure,
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001048 .queuecommand = megasas_queue_command,
1049 .eh_device_reset_handler = megasas_reset_device,
1050 .eh_bus_reset_handler = megasas_reset_bus_host,
1051 .eh_host_reset_handler = megasas_reset_bus_host,
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001052 .use_clustering = ENABLE_CLUSTERING,
1053};
1054
1055/**
1056 * megasas_complete_int_cmd - Completes an internal command
1057 * @instance: Adapter soft state
1058 * @cmd: Command to be completed
1059 *
1060 * The megasas_issue_blocked_cmd() function waits for a command to complete
1061 * after it issues a command. This function wakes up that waiting routine by
1062 * calling wake_up() on the wait queue.
1063 */
1064static void
1065megasas_complete_int_cmd(struct megasas_instance *instance,
1066 struct megasas_cmd *cmd)
1067{
1068 cmd->cmd_status = cmd->frame->io.cmd_status;
1069
1070 if (cmd->cmd_status == ENODATA) {
1071 cmd->cmd_status = 0;
1072 }
1073 wake_up(&instance->int_cmd_wait_q);
1074}
1075
1076/**
1077 * megasas_complete_abort - Completes aborting a command
1078 * @instance: Adapter soft state
1079 * @cmd: Cmd that was issued to abort another cmd
1080 *
1081 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
1082 * after it issues an abort on a previously issued command. This function
1083 * wakes up all functions waiting on the same wait queue.
1084 */
1085static void
1086megasas_complete_abort(struct megasas_instance *instance,
1087 struct megasas_cmd *cmd)
1088{
1089 if (cmd->sync_cmd) {
1090 cmd->sync_cmd = 0;
1091 cmd->cmd_status = 0;
1092 wake_up(&instance->abort_cmd_wait_q);
1093 }
1094
1095 return;
1096}
1097
1098/**
1099 * megasas_unmap_sgbuf - Unmap SG buffers
1100 * @instance: Adapter soft state
1101 * @cmd: Completed command
1102 */
Arjan van de Ven858119e2006-01-14 13:20:43 -08001103static void
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001104megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd)
1105{
1106 dma_addr_t buf_h;
1107 u8 opcode;
1108
1109 if (cmd->scmd->use_sg) {
1110 pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer,
1111 cmd->scmd->use_sg, cmd->scmd->sc_data_direction);
1112 return;
1113 }
1114
1115 if (!cmd->scmd->request_bufflen)
1116 return;
1117
1118 opcode = cmd->frame->hdr.cmd;
1119
1120 if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) {
1121 if (IS_DMA64)
1122 buf_h = cmd->frame->io.sgl.sge64[0].phys_addr;
1123 else
1124 buf_h = cmd->frame->io.sgl.sge32[0].phys_addr;
1125 } else {
1126 if (IS_DMA64)
1127 buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr;
1128 else
1129 buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr;
1130 }
1131
1132 pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen,
1133 cmd->scmd->sc_data_direction);
1134 return;
1135}
1136
1137/**
1138 * megasas_complete_cmd - Completes a command
1139 * @instance: Adapter soft state
1140 * @cmd: Command to be completed
1141 * @alt_status: If non-zero, use this value as status to
1142 * SCSI mid-layer instead of the value returned
1143 * by the FW. This should be used if caller wants
1144 * an alternate status (as in the case of aborted
1145 * commands)
1146 */
Arjan van de Ven858119e2006-01-14 13:20:43 -08001147static void
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001148megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
1149 u8 alt_status)
1150{
1151 int exception = 0;
1152 struct megasas_header *hdr = &cmd->frame->hdr;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001153
1154 if (cmd->scmd) {
1155 cmd->scmd->SCp.ptr = (char *)0;
1156 }
1157
1158 switch (hdr->cmd) {
1159
1160 case MFI_CMD_PD_SCSI_IO:
1161 case MFI_CMD_LD_SCSI_IO:
1162
1163 /*
1164 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
1165 * issued either through an IO path or an IOCTL path. If it
1166 * was via IOCTL, we will send it to internal completion.
1167 */
1168 if (cmd->sync_cmd) {
1169 cmd->sync_cmd = 0;
1170 megasas_complete_int_cmd(instance, cmd);
1171 break;
1172 }
1173
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001174 case MFI_CMD_LD_READ:
1175 case MFI_CMD_LD_WRITE:
1176
1177 if (alt_status) {
1178 cmd->scmd->result = alt_status << 16;
1179 exception = 1;
1180 }
1181
1182 if (exception) {
1183
Sumant Patroe4a082c2006-05-30 12:03:37 -07001184 atomic_dec(&instance->fw_outstanding);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001185
1186 megasas_unmap_sgbuf(instance, cmd);
1187 cmd->scmd->scsi_done(cmd->scmd);
1188 megasas_return_cmd(instance, cmd);
1189
1190 break;
1191 }
1192
1193 switch (hdr->cmd_status) {
1194
1195 case MFI_STAT_OK:
1196 cmd->scmd->result = DID_OK << 16;
1197 break;
1198
1199 case MFI_STAT_SCSI_IO_FAILED:
1200 case MFI_STAT_LD_INIT_IN_PROGRESS:
1201 cmd->scmd->result =
1202 (DID_ERROR << 16) | hdr->scsi_status;
1203 break;
1204
1205 case MFI_STAT_SCSI_DONE_WITH_ERROR:
1206
1207 cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
1208
1209 if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
1210 memset(cmd->scmd->sense_buffer, 0,
1211 SCSI_SENSE_BUFFERSIZE);
1212 memcpy(cmd->scmd->sense_buffer, cmd->sense,
1213 hdr->sense_len);
1214
1215 cmd->scmd->result |= DRIVER_SENSE << 24;
1216 }
1217
1218 break;
1219
1220 case MFI_STAT_LD_OFFLINE:
1221 case MFI_STAT_DEVICE_NOT_FOUND:
1222 cmd->scmd->result = DID_BAD_TARGET << 16;
1223 break;
1224
1225 default:
1226 printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
1227 hdr->cmd_status);
1228 cmd->scmd->result = DID_ERROR << 16;
1229 break;
1230 }
1231
Sumant Patroe4a082c2006-05-30 12:03:37 -07001232 atomic_dec(&instance->fw_outstanding);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001233
1234 megasas_unmap_sgbuf(instance, cmd);
1235 cmd->scmd->scsi_done(cmd->scmd);
1236 megasas_return_cmd(instance, cmd);
1237
1238 break;
1239
1240 case MFI_CMD_SMP:
1241 case MFI_CMD_STP:
1242 case MFI_CMD_DCMD:
1243
1244 /*
1245 * See if got an event notification
1246 */
1247 if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
1248 megasas_service_aen(instance, cmd);
1249 else
1250 megasas_complete_int_cmd(instance, cmd);
1251
1252 break;
1253
1254 case MFI_CMD_ABORT:
1255 /*
1256 * Cmd issued to abort another cmd returned
1257 */
1258 megasas_complete_abort(instance, cmd);
1259 break;
1260
1261 default:
1262 printk("megasas: Unknown command completed! [0x%X]\n",
1263 hdr->cmd);
1264 break;
1265 }
1266}
1267
1268/**
1269 * megasas_deplete_reply_queue - Processes all completed commands
1270 * @instance: Adapter soft state
1271 * @alt_status: Alternate status to be returned to
1272 * SCSI mid-layer instead of the status
1273 * returned by the FW
1274 */
Arjan van de Ven858119e2006-01-14 13:20:43 -08001275static int
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001276megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status)
1277{
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001278 /*
1279 * Check if it is our interrupt
Sumant Patro1341c932006-01-25 12:02:40 -08001280 * Clear the interrupt
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001281 */
Sumant Patro1341c932006-01-25 12:02:40 -08001282 if(instance->instancet->clear_intr(instance->reg_set))
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001283 return IRQ_NONE;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001284
Sumant Patro5d018ad2006-10-03 13:13:18 -07001285 /*
1286 * Schedule the tasklet for cmd completion
1287 */
1288 tasklet_schedule(&instance->isr_tasklet);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001289
1290 return IRQ_HANDLED;
1291}
1292
1293/**
1294 * megasas_isr - isr entry point
1295 */
1296static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs)
1297{
1298 return megasas_deplete_reply_queue((struct megasas_instance *)devp,
1299 DID_OK);
1300}
1301
1302/**
1303 * megasas_transition_to_ready - Move the FW to READY state
Sumant Patro1341c932006-01-25 12:02:40 -08001304 * @instance: Adapter soft state
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001305 *
1306 * During the initialization, FW passes can potentially be in any one of
1307 * several possible states. If the FW in operational, waiting-for-handshake
1308 * states, driver must take steps to bring it to ready state. Otherwise, it
1309 * has to wait for the ready state.
1310 */
1311static int
Sumant Patro1341c932006-01-25 12:02:40 -08001312megasas_transition_to_ready(struct megasas_instance* instance)
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001313{
1314 int i;
1315 u8 max_wait;
1316 u32 fw_state;
1317 u32 cur_state;
1318
Sumant Patro1341c932006-01-25 12:02:40 -08001319 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001320
Sumant Patroe3bbff92006-10-03 12:28:49 -07001321 if (fw_state != MFI_STATE_READY)
1322 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
1323 " state\n");
1324
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001325 while (fw_state != MFI_STATE_READY) {
1326
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001327 switch (fw_state) {
1328
1329 case MFI_STATE_FAULT:
1330
1331 printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
1332 return -ENODEV;
1333
1334 case MFI_STATE_WAIT_HANDSHAKE:
1335 /*
1336 * Set the CLR bit in inbound doorbell
1337 */
Sumant Patroe3bbff92006-10-03 12:28:49 -07001338 writel(MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
Sumant Patro1341c932006-01-25 12:02:40 -08001339 &instance->reg_set->inbound_doorbell);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001340
1341 max_wait = 2;
1342 cur_state = MFI_STATE_WAIT_HANDSHAKE;
1343 break;
1344
Sumant Patroe3bbff92006-10-03 12:28:49 -07001345 case MFI_STATE_BOOT_MESSAGE_PENDING:
1346 writel(MFI_INIT_HOTPLUG,
1347 &instance->reg_set->inbound_doorbell);
1348
1349 max_wait = 10;
1350 cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
1351 break;
1352
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001353 case MFI_STATE_OPERATIONAL:
1354 /*
Sumant Patroe3bbff92006-10-03 12:28:49 -07001355 * Bring it to READY state; assuming max wait 10 secs
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001356 */
Sumant Patrob274cab2006-10-03 12:52:12 -07001357 instance->instancet->disable_intr(instance->reg_set);
Sumant Patroe3bbff92006-10-03 12:28:49 -07001358 writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001359
1360 max_wait = 10;
1361 cur_state = MFI_STATE_OPERATIONAL;
1362 break;
1363
1364 case MFI_STATE_UNDEFINED:
1365 /*
1366 * This state should not last for more than 2 seconds
1367 */
1368 max_wait = 2;
1369 cur_state = MFI_STATE_UNDEFINED;
1370 break;
1371
1372 case MFI_STATE_BB_INIT:
1373 max_wait = 2;
1374 cur_state = MFI_STATE_BB_INIT;
1375 break;
1376
1377 case MFI_STATE_FW_INIT:
1378 max_wait = 20;
1379 cur_state = MFI_STATE_FW_INIT;
1380 break;
1381
1382 case MFI_STATE_FW_INIT_2:
1383 max_wait = 20;
1384 cur_state = MFI_STATE_FW_INIT_2;
1385 break;
1386
1387 case MFI_STATE_DEVICE_SCAN:
1388 max_wait = 20;
1389 cur_state = MFI_STATE_DEVICE_SCAN;
1390 break;
1391
1392 case MFI_STATE_FLUSH_CACHE:
1393 max_wait = 20;
1394 cur_state = MFI_STATE_FLUSH_CACHE;
1395 break;
1396
1397 default:
1398 printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
1399 fw_state);
1400 return -ENODEV;
1401 }
1402
1403 /*
1404 * The cur_state should not last for more than max_wait secs
1405 */
1406 for (i = 0; i < (max_wait * 1000); i++) {
Sumant Patro1341c932006-01-25 12:02:40 -08001407 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
1408 MFI_STATE_MASK ;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001409
1410 if (fw_state == cur_state) {
1411 msleep(1);
1412 } else
1413 break;
1414 }
1415
1416 /*
1417 * Return error if fw_state hasn't changed after max_wait
1418 */
1419 if (fw_state == cur_state) {
1420 printk(KERN_DEBUG "FW state [%d] hasn't changed "
1421 "in %d secs\n", fw_state, max_wait);
1422 return -ENODEV;
1423 }
1424 };
Sumant Patroe3bbff92006-10-03 12:28:49 -07001425 printk(KERN_INFO "megasas: FW now in Ready state\n");
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001426
1427 return 0;
1428}
1429
1430/**
1431 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
1432 * @instance: Adapter soft state
1433 */
1434static void megasas_teardown_frame_pool(struct megasas_instance *instance)
1435{
1436 int i;
1437 u32 max_cmd = instance->max_fw_cmds;
1438 struct megasas_cmd *cmd;
1439
1440 if (!instance->frame_dma_pool)
1441 return;
1442
1443 /*
1444 * Return all frames to pool
1445 */
1446 for (i = 0; i < max_cmd; i++) {
1447
1448 cmd = instance->cmd_list[i];
1449
1450 if (cmd->frame)
1451 pci_pool_free(instance->frame_dma_pool, cmd->frame,
1452 cmd->frame_phys_addr);
1453
1454 if (cmd->sense)
Sumant Patroe3bbff92006-10-03 12:28:49 -07001455 pci_pool_free(instance->sense_dma_pool, cmd->sense,
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001456 cmd->sense_phys_addr);
1457 }
1458
1459 /*
1460 * Now destroy the pool itself
1461 */
1462 pci_pool_destroy(instance->frame_dma_pool);
1463 pci_pool_destroy(instance->sense_dma_pool);
1464
1465 instance->frame_dma_pool = NULL;
1466 instance->sense_dma_pool = NULL;
1467}
1468
1469/**
1470 * megasas_create_frame_pool - Creates DMA pool for cmd frames
1471 * @instance: Adapter soft state
1472 *
1473 * Each command packet has an embedded DMA memory buffer that is used for
1474 * filling MFI frame and the SG list that immediately follows the frame. This
1475 * function creates those DMA memory buffers for each command packet by using
1476 * PCI pool facility.
1477 */
1478static int megasas_create_frame_pool(struct megasas_instance *instance)
1479{
1480 int i;
1481 u32 max_cmd;
1482 u32 sge_sz;
1483 u32 sgl_sz;
1484 u32 total_sz;
1485 u32 frame_count;
1486 struct megasas_cmd *cmd;
1487
1488 max_cmd = instance->max_fw_cmds;
1489
1490 /*
1491 * Size of our frame is 64 bytes for MFI frame, followed by max SG
1492 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
1493 */
1494 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1495 sizeof(struct megasas_sge32);
1496
1497 /*
1498 * Calculated the number of 64byte frames required for SGL
1499 */
1500 sgl_sz = sge_sz * instance->max_num_sge;
1501 frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
1502
1503 /*
1504 * We need one extra frame for the MFI command
1505 */
1506 frame_count++;
1507
1508 total_sz = MEGAMFI_FRAME_SIZE * frame_count;
1509 /*
1510 * Use DMA pool facility provided by PCI layer
1511 */
1512 instance->frame_dma_pool = pci_pool_create("megasas frame pool",
1513 instance->pdev, total_sz, 64,
1514 0);
1515
1516 if (!instance->frame_dma_pool) {
1517 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
1518 return -ENOMEM;
1519 }
1520
1521 instance->sense_dma_pool = pci_pool_create("megasas sense pool",
1522 instance->pdev, 128, 4, 0);
1523
1524 if (!instance->sense_dma_pool) {
1525 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
1526
1527 pci_pool_destroy(instance->frame_dma_pool);
1528 instance->frame_dma_pool = NULL;
1529
1530 return -ENOMEM;
1531 }
1532
1533 /*
1534 * Allocate and attach a frame to each of the commands in cmd_list.
1535 * By making cmd->index as the context instead of the &cmd, we can
1536 * always use 32bit context regardless of the architecture
1537 */
1538 for (i = 0; i < max_cmd; i++) {
1539
1540 cmd = instance->cmd_list[i];
1541
1542 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
1543 GFP_KERNEL, &cmd->frame_phys_addr);
1544
1545 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
1546 GFP_KERNEL, &cmd->sense_phys_addr);
1547
1548 /*
1549 * megasas_teardown_frame_pool() takes care of freeing
1550 * whatever has been allocated
1551 */
1552 if (!cmd->frame || !cmd->sense) {
1553 printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
1554 megasas_teardown_frame_pool(instance);
1555 return -ENOMEM;
1556 }
1557
1558 cmd->frame->io.context = cmd->index;
1559 }
1560
1561 return 0;
1562}
1563
1564/**
1565 * megasas_free_cmds - Free all the cmds in the free cmd pool
1566 * @instance: Adapter soft state
1567 */
1568static void megasas_free_cmds(struct megasas_instance *instance)
1569{
1570 int i;
1571 /* First free the MFI frame pool */
1572 megasas_teardown_frame_pool(instance);
1573
1574 /* Free all the commands in the cmd_list */
1575 for (i = 0; i < instance->max_fw_cmds; i++)
1576 kfree(instance->cmd_list[i]);
1577
1578 /* Free the cmd_list buffer itself */
1579 kfree(instance->cmd_list);
1580 instance->cmd_list = NULL;
1581
1582 INIT_LIST_HEAD(&instance->cmd_pool);
1583}
1584
1585/**
1586 * megasas_alloc_cmds - Allocates the command packets
1587 * @instance: Adapter soft state
1588 *
1589 * Each command that is issued to the FW, whether IO commands from the OS or
1590 * internal commands like IOCTLs, are wrapped in local data structure called
1591 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
1592 * the FW.
1593 *
1594 * Each frame has a 32-bit field called context (tag). This context is used
1595 * to get back the megasas_cmd from the frame when a frame gets completed in
1596 * the ISR. Typically the address of the megasas_cmd itself would be used as
1597 * the context. But we wanted to keep the differences between 32 and 64 bit
1598 * systems to the mininum. We always use 32 bit integers for the context. In
1599 * this driver, the 32 bit values are the indices into an array cmd_list.
1600 * This array is used only to look up the megasas_cmd given the context. The
1601 * free commands themselves are maintained in a linked list called cmd_pool.
1602 */
1603static int megasas_alloc_cmds(struct megasas_instance *instance)
1604{
1605 int i;
1606 int j;
1607 u32 max_cmd;
1608 struct megasas_cmd *cmd;
1609
1610 max_cmd = instance->max_fw_cmds;
1611
1612 /*
1613 * instance->cmd_list is an array of struct megasas_cmd pointers.
1614 * Allocate the dynamic array first and then allocate individual
1615 * commands.
1616 */
1617 instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd,
1618 GFP_KERNEL);
1619
1620 if (!instance->cmd_list) {
1621 printk(KERN_DEBUG "megasas: out of memory\n");
1622 return -ENOMEM;
1623 }
1624
1625 memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd);
1626
1627 for (i = 0; i < max_cmd; i++) {
1628 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
1629 GFP_KERNEL);
1630
1631 if (!instance->cmd_list[i]) {
1632
1633 for (j = 0; j < i; j++)
1634 kfree(instance->cmd_list[j]);
1635
1636 kfree(instance->cmd_list);
1637 instance->cmd_list = NULL;
1638
1639 return -ENOMEM;
1640 }
1641 }
1642
1643 /*
1644 * Add all the commands to command pool (instance->cmd_pool)
1645 */
1646 for (i = 0; i < max_cmd; i++) {
1647 cmd = instance->cmd_list[i];
1648 memset(cmd, 0, sizeof(struct megasas_cmd));
1649 cmd->index = i;
1650 cmd->instance = instance;
1651
1652 list_add_tail(&cmd->list, &instance->cmd_pool);
1653 }
1654
1655 /*
1656 * Create a frame pool and assign one frame to each cmd
1657 */
1658 if (megasas_create_frame_pool(instance)) {
1659 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
1660 megasas_free_cmds(instance);
1661 }
1662
1663 return 0;
1664}
1665
1666/**
1667 * megasas_get_controller_info - Returns FW's controller structure
1668 * @instance: Adapter soft state
1669 * @ctrl_info: Controller information structure
1670 *
1671 * Issues an internal command (DCMD) to get the FW's controller structure.
1672 * This information is mainly used to find out the maximum IO transfer per
1673 * command supported by the FW.
1674 */
1675static int
1676megasas_get_ctrl_info(struct megasas_instance *instance,
1677 struct megasas_ctrl_info *ctrl_info)
1678{
1679 int ret = 0;
1680 struct megasas_cmd *cmd;
1681 struct megasas_dcmd_frame *dcmd;
1682 struct megasas_ctrl_info *ci;
1683 dma_addr_t ci_h = 0;
1684
1685 cmd = megasas_get_cmd(instance);
1686
1687 if (!cmd) {
1688 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
1689 return -ENOMEM;
1690 }
1691
1692 dcmd = &cmd->frame->dcmd;
1693
1694 ci = pci_alloc_consistent(instance->pdev,
1695 sizeof(struct megasas_ctrl_info), &ci_h);
1696
1697 if (!ci) {
1698 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
1699 megasas_return_cmd(instance, cmd);
1700 return -ENOMEM;
1701 }
1702
1703 memset(ci, 0, sizeof(*ci));
1704 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1705
1706 dcmd->cmd = MFI_CMD_DCMD;
1707 dcmd->cmd_status = 0xFF;
1708 dcmd->sge_count = 1;
1709 dcmd->flags = MFI_FRAME_DIR_READ;
1710 dcmd->timeout = 0;
1711 dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
1712 dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
1713 dcmd->sgl.sge32[0].phys_addr = ci_h;
1714 dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
1715
1716 if (!megasas_issue_polled(instance, cmd)) {
1717 ret = 0;
1718 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
1719 } else {
1720 ret = -1;
1721 }
1722
1723 pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
1724 ci, ci_h);
1725
1726 megasas_return_cmd(instance, cmd);
1727 return ret;
1728}
1729
1730/**
Sumant Patro5d018ad2006-10-03 13:13:18 -07001731 * megasas_complete_cmd_dpc - Returns FW's controller structure
1732 * @instance_addr: Address of adapter soft state
1733 *
1734 * Tasklet to complete cmds
1735 */
1736void megasas_complete_cmd_dpc(unsigned long instance_addr)
1737{
1738 u32 producer;
1739 u32 consumer;
1740 u32 context;
1741 struct megasas_cmd *cmd;
1742 struct megasas_instance *instance = (struct megasas_instance *)instance_addr;
1743
1744 producer = *instance->producer;
1745 consumer = *instance->consumer;
1746
1747 while (consumer != producer) {
1748 context = instance->reply_queue[consumer];
1749
1750 cmd = instance->cmd_list[context];
1751
1752 megasas_complete_cmd(instance, cmd, DID_OK);
1753
1754 consumer++;
1755 if (consumer == (instance->max_fw_cmds + 1)) {
1756 consumer = 0;
1757 }
1758 }
1759
1760 *instance->consumer = producer;
1761}
1762
1763/**
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001764 * megasas_init_mfi - Initializes the FW
1765 * @instance: Adapter soft state
1766 *
1767 * This is the main function for initializing MFI firmware.
1768 */
1769static int megasas_init_mfi(struct megasas_instance *instance)
1770{
1771 u32 context_sz;
1772 u32 reply_q_sz;
1773 u32 max_sectors_1;
1774 u32 max_sectors_2;
1775 struct megasas_register_set __iomem *reg_set;
1776
1777 struct megasas_cmd *cmd;
1778 struct megasas_ctrl_info *ctrl_info;
1779
1780 struct megasas_init_frame *init_frame;
1781 struct megasas_init_queue_info *initq_info;
1782 dma_addr_t init_frame_h;
1783 dma_addr_t initq_info_h;
1784
1785 /*
1786 * Map the message registers
1787 */
1788 instance->base_addr = pci_resource_start(instance->pdev, 0);
1789
1790 if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) {
1791 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
1792 return -EBUSY;
1793 }
1794
1795 instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
1796
1797 if (!instance->reg_set) {
1798 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
1799 goto fail_ioremap;
1800 }
1801
1802 reg_set = instance->reg_set;
1803
Sumant Patrof9876f02006-02-03 15:34:35 -08001804 switch(instance->pdev->device)
1805 {
1806 case PCI_DEVICE_ID_LSI_SAS1078R:
1807 instance->instancet = &megasas_instance_template_ppc;
1808 break;
1809 case PCI_DEVICE_ID_LSI_SAS1064R:
1810 case PCI_DEVICE_ID_DELL_PERC5:
1811 default:
1812 instance->instancet = &megasas_instance_template_xscale;
1813 break;
1814 }
Sumant Patro1341c932006-01-25 12:02:40 -08001815
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001816 /*
1817 * We expect the FW state to be READY
1818 */
Sumant Patro1341c932006-01-25 12:02:40 -08001819 if (megasas_transition_to_ready(instance))
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001820 goto fail_ready_state;
1821
1822 /*
1823 * Get various operational parameters from status register
1824 */
Sumant Patro1341c932006-01-25 12:02:40 -08001825 instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
Sumant Patroe3bbff92006-10-03 12:28:49 -07001826 /*
1827 * Reduce the max supported cmds by 1. This is to ensure that the
1828 * reply_q_sz (1 more than the max cmd that driver may send)
1829 * does not exceed max cmds that the FW can support
1830 */
1831 instance->max_fw_cmds = instance->max_fw_cmds-1;
Sumant Patro1341c932006-01-25 12:02:40 -08001832 instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
1833 0x10;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001834 /*
1835 * Create a pool of commands
1836 */
1837 if (megasas_alloc_cmds(instance))
1838 goto fail_alloc_cmds;
1839
1840 /*
1841 * Allocate memory for reply queue. Length of reply queue should
1842 * be _one_ more than the maximum commands handled by the firmware.
1843 *
1844 * Note: When FW completes commands, it places corresponding contex
1845 * values in this circular reply queue. This circular queue is a fairly
1846 * typical producer-consumer queue. FW is the producer (of completed
1847 * commands) and the driver is the consumer.
1848 */
1849 context_sz = sizeof(u32);
1850 reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
1851
1852 instance->reply_queue = pci_alloc_consistent(instance->pdev,
1853 reply_q_sz,
1854 &instance->reply_queue_h);
1855
1856 if (!instance->reply_queue) {
1857 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
1858 goto fail_reply_queue;
1859 }
1860
1861 /*
1862 * Prepare a init frame. Note the init frame points to queue info
1863 * structure. Each frame has SGL allocated after first 64 bytes. For
1864 * this frame - since we don't need any SGL - we use SGL's space as
1865 * queue info structure
1866 *
1867 * We will not get a NULL command below. We just created the pool.
1868 */
1869 cmd = megasas_get_cmd(instance);
1870
1871 init_frame = (struct megasas_init_frame *)cmd->frame;
1872 initq_info = (struct megasas_init_queue_info *)
1873 ((unsigned long)init_frame + 64);
1874
1875 init_frame_h = cmd->frame_phys_addr;
1876 initq_info_h = init_frame_h + 64;
1877
1878 memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
1879 memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
1880
1881 initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
1882 initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
1883
1884 initq_info->producer_index_phys_addr_lo = instance->producer_h;
1885 initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
1886
1887 init_frame->cmd = MFI_CMD_INIT;
1888 init_frame->cmd_status = 0xFF;
1889 init_frame->queue_info_new_phys_addr_lo = initq_info_h;
1890
1891 init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
1892
1893 /*
Sumant Patro0e989362006-06-20 15:32:37 -07001894 * disable the intr before firing the init frame to FW
1895 */
Sumant Patrob274cab2006-10-03 12:52:12 -07001896 instance->instancet->disable_intr(instance->reg_set);
Sumant Patro0e989362006-06-20 15:32:37 -07001897
1898 /*
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001899 * Issue the init frame in polled mode
1900 */
1901 if (megasas_issue_polled(instance, cmd)) {
1902 printk(KERN_DEBUG "megasas: Failed to init firmware\n");
1903 goto fail_fw_init;
1904 }
1905
1906 megasas_return_cmd(instance, cmd);
1907
1908 ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
1909
1910 /*
1911 * Compute the max allowed sectors per IO: The controller info has two
1912 * limits on max sectors. Driver should use the minimum of these two.
1913 *
1914 * 1 << stripe_sz_ops.min = max sectors per strip
1915 *
1916 * Note that older firmwares ( < FW ver 30) didn't report information
1917 * to calculate max_sectors_1. So the number ended up as zero always.
1918 */
1919 if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
1920
1921 max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
1922 ctrl_info->max_strips_per_io;
1923 max_sectors_2 = ctrl_info->max_request_size;
1924
1925 instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2)
1926 ? max_sectors_1 : max_sectors_2;
1927 } else
1928 instance->max_sectors_per_req = instance->max_num_sge *
1929 PAGE_SIZE / 512;
1930
1931 kfree(ctrl_info);
1932
Sumant Patro5d018ad2006-10-03 13:13:18 -07001933 /*
1934 * Setup tasklet for cmd completion
1935 */
1936
1937 tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc,
1938 (unsigned long)instance);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04001939 return 0;
1940
1941 fail_fw_init:
1942 megasas_return_cmd(instance, cmd);
1943
1944 pci_free_consistent(instance->pdev, reply_q_sz,
1945 instance->reply_queue, instance->reply_queue_h);
1946 fail_reply_queue:
1947 megasas_free_cmds(instance);
1948
1949 fail_alloc_cmds:
1950 fail_ready_state:
1951 iounmap(instance->reg_set);
1952
1953 fail_ioremap:
1954 pci_release_regions(instance->pdev);
1955
1956 return -EINVAL;
1957}
1958
1959/**
1960 * megasas_release_mfi - Reverses the FW initialization
1961 * @intance: Adapter soft state
1962 */
1963static void megasas_release_mfi(struct megasas_instance *instance)
1964{
1965 u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1);
1966
1967 pci_free_consistent(instance->pdev, reply_q_sz,
1968 instance->reply_queue, instance->reply_queue_h);
1969
1970 megasas_free_cmds(instance);
1971
1972 iounmap(instance->reg_set);
1973
1974 pci_release_regions(instance->pdev);
1975}
1976
1977/**
1978 * megasas_get_seq_num - Gets latest event sequence numbers
1979 * @instance: Adapter soft state
1980 * @eli: FW event log sequence numbers information
1981 *
1982 * FW maintains a log of all events in a non-volatile area. Upper layers would
1983 * usually find out the latest sequence number of the events, the seq number at
1984 * the boot etc. They would "read" all the events below the latest seq number
1985 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
1986 * number), they would subsribe to AEN (asynchronous event notification) and
1987 * wait for the events to happen.
1988 */
1989static int
1990megasas_get_seq_num(struct megasas_instance *instance,
1991 struct megasas_evt_log_info *eli)
1992{
1993 struct megasas_cmd *cmd;
1994 struct megasas_dcmd_frame *dcmd;
1995 struct megasas_evt_log_info *el_info;
1996 dma_addr_t el_info_h = 0;
1997
1998 cmd = megasas_get_cmd(instance);
1999
2000 if (!cmd) {
2001 return -ENOMEM;
2002 }
2003
2004 dcmd = &cmd->frame->dcmd;
2005 el_info = pci_alloc_consistent(instance->pdev,
2006 sizeof(struct megasas_evt_log_info),
2007 &el_info_h);
2008
2009 if (!el_info) {
2010 megasas_return_cmd(instance, cmd);
2011 return -ENOMEM;
2012 }
2013
2014 memset(el_info, 0, sizeof(*el_info));
2015 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2016
2017 dcmd->cmd = MFI_CMD_DCMD;
2018 dcmd->cmd_status = 0x0;
2019 dcmd->sge_count = 1;
2020 dcmd->flags = MFI_FRAME_DIR_READ;
2021 dcmd->timeout = 0;
2022 dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
2023 dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
2024 dcmd->sgl.sge32[0].phys_addr = el_info_h;
2025 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
2026
2027 megasas_issue_blocked_cmd(instance, cmd);
2028
2029 /*
2030 * Copy the data back into callers buffer
2031 */
2032 memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
2033
2034 pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
2035 el_info, el_info_h);
2036
2037 megasas_return_cmd(instance, cmd);
2038
2039 return 0;
2040}
2041
2042/**
2043 * megasas_register_aen - Registers for asynchronous event notification
2044 * @instance: Adapter soft state
2045 * @seq_num: The starting sequence number
2046 * @class_locale: Class of the event
2047 *
2048 * This function subscribes for AEN for events beyond the @seq_num. It requests
2049 * to be notified if and only if the event is of type @class_locale
2050 */
2051static int
2052megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
2053 u32 class_locale_word)
2054{
2055 int ret_val;
2056 struct megasas_cmd *cmd;
2057 struct megasas_dcmd_frame *dcmd;
2058 union megasas_evt_class_locale curr_aen;
2059 union megasas_evt_class_locale prev_aen;
2060
2061 /*
2062 * If there an AEN pending already (aen_cmd), check if the
2063 * class_locale of that pending AEN is inclusive of the new
2064 * AEN request we currently have. If it is, then we don't have
2065 * to do anything. In other words, whichever events the current
2066 * AEN request is subscribing to, have already been subscribed
2067 * to.
2068 *
2069 * If the old_cmd is _not_ inclusive, then we have to abort
2070 * that command, form a class_locale that is superset of both
2071 * old and current and re-issue to the FW
2072 */
2073
2074 curr_aen.word = class_locale_word;
2075
2076 if (instance->aen_cmd) {
2077
2078 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
2079
2080 /*
2081 * A class whose enum value is smaller is inclusive of all
2082 * higher values. If a PROGRESS (= -1) was previously
2083 * registered, then a new registration requests for higher
2084 * classes need not be sent to FW. They are automatically
2085 * included.
2086 *
2087 * Locale numbers don't have such hierarchy. They are bitmap
2088 * values
2089 */
2090 if ((prev_aen.members.class <= curr_aen.members.class) &&
2091 !((prev_aen.members.locale & curr_aen.members.locale) ^
2092 curr_aen.members.locale)) {
2093 /*
2094 * Previously issued event registration includes
2095 * current request. Nothing to do.
2096 */
2097 return 0;
2098 } else {
2099 curr_aen.members.locale |= prev_aen.members.locale;
2100
2101 if (prev_aen.members.class < curr_aen.members.class)
2102 curr_aen.members.class = prev_aen.members.class;
2103
2104 instance->aen_cmd->abort_aen = 1;
2105 ret_val = megasas_issue_blocked_abort_cmd(instance,
2106 instance->
2107 aen_cmd);
2108
2109 if (ret_val) {
2110 printk(KERN_DEBUG "megasas: Failed to abort "
2111 "previous AEN command\n");
2112 return ret_val;
2113 }
2114 }
2115 }
2116
2117 cmd = megasas_get_cmd(instance);
2118
2119 if (!cmd)
2120 return -ENOMEM;
2121
2122 dcmd = &cmd->frame->dcmd;
2123
2124 memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
2125
2126 /*
2127 * Prepare DCMD for aen registration
2128 */
2129 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2130
2131 dcmd->cmd = MFI_CMD_DCMD;
2132 dcmd->cmd_status = 0x0;
2133 dcmd->sge_count = 1;
2134 dcmd->flags = MFI_FRAME_DIR_READ;
2135 dcmd->timeout = 0;
2136 dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
2137 dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
2138 dcmd->mbox.w[0] = seq_num;
2139 dcmd->mbox.w[1] = curr_aen.word;
2140 dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
2141 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
2142
2143 /*
2144 * Store reference to the cmd used to register for AEN. When an
2145 * application wants us to register for AEN, we have to abort this
2146 * cmd and re-register with a new EVENT LOCALE supplied by that app
2147 */
2148 instance->aen_cmd = cmd;
2149
2150 /*
2151 * Issue the aen registration frame
2152 */
Sumant Patro1341c932006-01-25 12:02:40 -08002153 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002154
2155 return 0;
2156}
2157
2158/**
2159 * megasas_start_aen - Subscribes to AEN during driver load time
2160 * @instance: Adapter soft state
2161 */
2162static int megasas_start_aen(struct megasas_instance *instance)
2163{
2164 struct megasas_evt_log_info eli;
2165 union megasas_evt_class_locale class_locale;
2166
2167 /*
2168 * Get the latest sequence number from FW
2169 */
2170 memset(&eli, 0, sizeof(eli));
2171
2172 if (megasas_get_seq_num(instance, &eli))
2173 return -1;
2174
2175 /*
2176 * Register AEN with FW for latest sequence number plus 1
2177 */
2178 class_locale.members.reserved = 0;
2179 class_locale.members.locale = MR_EVT_LOCALE_ALL;
2180 class_locale.members.class = MR_EVT_CLASS_DEBUG;
2181
2182 return megasas_register_aen(instance, eli.newest_seq_num + 1,
2183 class_locale.word);
2184}
2185
2186/**
2187 * megasas_io_attach - Attaches this driver to SCSI mid-layer
2188 * @instance: Adapter soft state
2189 */
2190static int megasas_io_attach(struct megasas_instance *instance)
2191{
2192 struct Scsi_Host *host = instance->host;
2193
2194 /*
2195 * Export parameters required by SCSI mid-layer
2196 */
2197 host->irq = instance->pdev->irq;
2198 host->unique_id = instance->unique_id;
2199 host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS;
2200 host->this_id = instance->init_id;
2201 host->sg_tablesize = instance->max_num_sge;
2202 host->max_sectors = instance->max_sectors_per_req;
2203 host->cmd_per_lun = 128;
2204 host->max_channel = MEGASAS_MAX_CHANNELS - 1;
2205 host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
2206 host->max_lun = MEGASAS_MAX_LUN;
Joshua Giles122da302006-02-03 15:34:17 -08002207 host->max_cmd_len = 16;
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002208
2209 /*
2210 * Notify the mid-layer about the new controller
2211 */
2212 if (scsi_add_host(host, &instance->pdev->dev)) {
2213 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
2214 return -ENODEV;
2215 }
2216
2217 /*
2218 * Trigger SCSI to scan our drives
2219 */
2220 scsi_scan_host(host);
2221 return 0;
2222}
2223
2224/**
2225 * megasas_probe_one - PCI hotplug entry point
2226 * @pdev: PCI device structure
2227 * @id: PCI ids of supported hotplugged adapter
2228 */
2229static int __devinit
2230megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
2231{
2232 int rval;
2233 struct Scsi_Host *host;
2234 struct megasas_instance *instance;
2235
2236 /*
2237 * Announce PCI information
2238 */
2239 printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
2240 pdev->vendor, pdev->device, pdev->subsystem_vendor,
2241 pdev->subsystem_device);
2242
2243 printk("bus %d:slot %d:func %d\n",
2244 pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
2245
2246 /*
2247 * PCI prepping: enable device set bus mastering and dma mask
2248 */
2249 rval = pci_enable_device(pdev);
2250
2251 if (rval) {
2252 return rval;
2253 }
2254
2255 pci_set_master(pdev);
2256
2257 /*
2258 * All our contollers are capable of performing 64-bit DMA
2259 */
2260 if (IS_DMA64) {
2261 if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
2262
2263 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2264 goto fail_set_dma_mask;
2265 }
2266 } else {
2267 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2268 goto fail_set_dma_mask;
2269 }
2270
2271 host = scsi_host_alloc(&megasas_template,
2272 sizeof(struct megasas_instance));
2273
2274 if (!host) {
2275 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
2276 goto fail_alloc_instance;
2277 }
2278
2279 instance = (struct megasas_instance *)host->hostdata;
2280 memset(instance, 0, sizeof(*instance));
2281
2282 instance->producer = pci_alloc_consistent(pdev, sizeof(u32),
2283 &instance->producer_h);
2284 instance->consumer = pci_alloc_consistent(pdev, sizeof(u32),
2285 &instance->consumer_h);
2286
2287 if (!instance->producer || !instance->consumer) {
2288 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2289 "producer, consumer\n");
2290 goto fail_alloc_dma_buf;
2291 }
2292
2293 *instance->producer = 0;
2294 *instance->consumer = 0;
2295
2296 instance->evt_detail = pci_alloc_consistent(pdev,
2297 sizeof(struct
2298 megasas_evt_detail),
2299 &instance->evt_detail_h);
2300
2301 if (!instance->evt_detail) {
2302 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2303 "event detail structure\n");
2304 goto fail_alloc_dma_buf;
2305 }
2306
2307 /*
2308 * Initialize locks and queues
2309 */
2310 INIT_LIST_HEAD(&instance->cmd_pool);
2311
Sumant Patroe4a082c2006-05-30 12:03:37 -07002312 atomic_set(&instance->fw_outstanding,0);
2313
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002314 init_waitqueue_head(&instance->int_cmd_wait_q);
2315 init_waitqueue_head(&instance->abort_cmd_wait_q);
2316
2317 spin_lock_init(&instance->cmd_pool_lock);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002318
2319 sema_init(&instance->aen_mutex, 1);
2320 sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
2321
2322 /*
2323 * Initialize PCI related and misc parameters
2324 */
2325 instance->pdev = pdev;
2326 instance->host = host;
2327 instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
2328 instance->init_id = MEGASAS_DEFAULT_INIT_ID;
2329
Sumant Patro658dced2006-10-03 13:09:14 -07002330 megasas_dbg_lvl = 0;
2331
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002332 /*
2333 * Initialize MFI Firmware
2334 */
2335 if (megasas_init_mfi(instance))
2336 goto fail_init_mfi;
2337
2338 /*
2339 * Register IRQ
2340 */
Thomas Gleixner1d6f3592006-07-01 19:29:42 -07002341 if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED, "megasas", instance)) {
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002342 printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
2343 goto fail_irq;
2344 }
2345
Sumant Patro1341c932006-01-25 12:02:40 -08002346 instance->instancet->enable_intr(instance->reg_set);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002347
2348 /*
2349 * Store instance in PCI softstate
2350 */
2351 pci_set_drvdata(pdev, instance);
2352
2353 /*
2354 * Add this controller to megasas_mgmt_info structure so that it
2355 * can be exported to management applications
2356 */
2357 megasas_mgmt_info.count++;
2358 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
2359 megasas_mgmt_info.max_index++;
2360
2361 /*
2362 * Initiate AEN (Asynchronous Event Notification)
2363 */
2364 if (megasas_start_aen(instance)) {
2365 printk(KERN_DEBUG "megasas: start aen failed\n");
2366 goto fail_start_aen;
2367 }
2368
2369 /*
2370 * Register with SCSI mid-layer
2371 */
2372 if (megasas_io_attach(instance))
2373 goto fail_io_attach;
2374
2375 return 0;
2376
2377 fail_start_aen:
2378 fail_io_attach:
2379 megasas_mgmt_info.count--;
2380 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
2381 megasas_mgmt_info.max_index--;
2382
2383 pci_set_drvdata(pdev, NULL);
Sumant Patrob274cab2006-10-03 12:52:12 -07002384 instance->instancet->disable_intr(instance->reg_set);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002385 free_irq(instance->pdev->irq, instance);
2386
2387 megasas_release_mfi(instance);
2388
2389 fail_irq:
2390 fail_init_mfi:
2391 fail_alloc_dma_buf:
2392 if (instance->evt_detail)
2393 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2394 instance->evt_detail,
2395 instance->evt_detail_h);
2396
2397 if (instance->producer)
2398 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2399 instance->producer_h);
2400 if (instance->consumer)
2401 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2402 instance->consumer_h);
2403 scsi_host_put(host);
2404
2405 fail_alloc_instance:
2406 fail_set_dma_mask:
2407 pci_disable_device(pdev);
2408
2409 return -ENODEV;
2410}
2411
2412/**
2413 * megasas_flush_cache - Requests FW to flush all its caches
2414 * @instance: Adapter soft state
2415 */
2416static void megasas_flush_cache(struct megasas_instance *instance)
2417{
2418 struct megasas_cmd *cmd;
2419 struct megasas_dcmd_frame *dcmd;
2420
2421 cmd = megasas_get_cmd(instance);
2422
2423 if (!cmd)
2424 return;
2425
2426 dcmd = &cmd->frame->dcmd;
2427
2428 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2429
2430 dcmd->cmd = MFI_CMD_DCMD;
2431 dcmd->cmd_status = 0x0;
2432 dcmd->sge_count = 0;
2433 dcmd->flags = MFI_FRAME_DIR_NONE;
2434 dcmd->timeout = 0;
2435 dcmd->data_xfer_len = 0;
2436 dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
2437 dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
2438
2439 megasas_issue_blocked_cmd(instance, cmd);
2440
2441 megasas_return_cmd(instance, cmd);
2442
2443 return;
2444}
2445
2446/**
2447 * megasas_shutdown_controller - Instructs FW to shutdown the controller
2448 * @instance: Adapter soft state
2449 */
2450static void megasas_shutdown_controller(struct megasas_instance *instance)
2451{
2452 struct megasas_cmd *cmd;
2453 struct megasas_dcmd_frame *dcmd;
2454
2455 cmd = megasas_get_cmd(instance);
2456
2457 if (!cmd)
2458 return;
2459
2460 if (instance->aen_cmd)
2461 megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
2462
2463 dcmd = &cmd->frame->dcmd;
2464
2465 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2466
2467 dcmd->cmd = MFI_CMD_DCMD;
2468 dcmd->cmd_status = 0x0;
2469 dcmd->sge_count = 0;
2470 dcmd->flags = MFI_FRAME_DIR_NONE;
2471 dcmd->timeout = 0;
2472 dcmd->data_xfer_len = 0;
2473 dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN;
2474
2475 megasas_issue_blocked_cmd(instance, cmd);
2476
2477 megasas_return_cmd(instance, cmd);
2478
2479 return;
2480}
2481
2482/**
2483 * megasas_detach_one - PCI hot"un"plug entry point
2484 * @pdev: PCI device structure
2485 */
2486static void megasas_detach_one(struct pci_dev *pdev)
2487{
2488 int i;
2489 struct Scsi_Host *host;
2490 struct megasas_instance *instance;
2491
2492 instance = pci_get_drvdata(pdev);
2493 host = instance->host;
2494
2495 scsi_remove_host(instance->host);
2496 megasas_flush_cache(instance);
2497 megasas_shutdown_controller(instance);
Sumant Patro5d018ad2006-10-03 13:13:18 -07002498 tasklet_kill(&instance->isr_tasklet);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002499
2500 /*
2501 * Take the instance off the instance array. Note that we will not
2502 * decrement the max_index. We let this array be sparse array
2503 */
2504 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
2505 if (megasas_mgmt_info.instance[i] == instance) {
2506 megasas_mgmt_info.count--;
2507 megasas_mgmt_info.instance[i] = NULL;
2508
2509 break;
2510 }
2511 }
2512
2513 pci_set_drvdata(instance->pdev, NULL);
2514
Sumant Patrob274cab2006-10-03 12:52:12 -07002515 instance->instancet->disable_intr(instance->reg_set);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002516
2517 free_irq(instance->pdev->irq, instance);
2518
2519 megasas_release_mfi(instance);
2520
2521 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2522 instance->evt_detail, instance->evt_detail_h);
2523
2524 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2525 instance->producer_h);
2526
2527 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2528 instance->consumer_h);
2529
2530 scsi_host_put(host);
2531
2532 pci_set_drvdata(pdev, NULL);
2533
2534 pci_disable_device(pdev);
2535
2536 return;
2537}
2538
2539/**
2540 * megasas_shutdown - Shutdown entry point
2541 * @device: Generic device structure
2542 */
2543static void megasas_shutdown(struct pci_dev *pdev)
2544{
2545 struct megasas_instance *instance = pci_get_drvdata(pdev);
2546 megasas_flush_cache(instance);
2547}
2548
2549/**
2550 * megasas_mgmt_open - char node "open" entry point
2551 */
2552static int megasas_mgmt_open(struct inode *inode, struct file *filep)
2553{
2554 /*
2555 * Allow only those users with admin rights
2556 */
2557 if (!capable(CAP_SYS_ADMIN))
2558 return -EACCES;
2559
2560 return 0;
2561}
2562
2563/**
2564 * megasas_mgmt_release - char node "release" entry point
2565 */
2566static int megasas_mgmt_release(struct inode *inode, struct file *filep)
2567{
2568 filep->private_data = NULL;
2569 fasync_helper(-1, filep, 0, &megasas_async_queue);
2570
2571 return 0;
2572}
2573
2574/**
2575 * megasas_mgmt_fasync - Async notifier registration from applications
2576 *
2577 * This function adds the calling process to a driver global queue. When an
2578 * event occurs, SIGIO will be sent to all processes in this queue.
2579 */
2580static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
2581{
2582 int rc;
2583
Arjan van de Ven0b950672006-01-11 13:16:10 +01002584 mutex_lock(&megasas_async_queue_mutex);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002585
2586 rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
2587
Arjan van de Ven0b950672006-01-11 13:16:10 +01002588 mutex_unlock(&megasas_async_queue_mutex);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002589
2590 if (rc >= 0) {
2591 /* For sanity check when we get ioctl */
2592 filep->private_data = filep;
2593 return 0;
2594 }
2595
2596 printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
2597
2598 return rc;
2599}
2600
2601/**
2602 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
2603 * @instance: Adapter soft state
2604 * @argp: User's ioctl packet
2605 */
2606static int
2607megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
2608 struct megasas_iocpacket __user * user_ioc,
2609 struct megasas_iocpacket *ioc)
2610{
2611 struct megasas_sge32 *kern_sge32;
2612 struct megasas_cmd *cmd;
2613 void *kbuff_arr[MAX_IOCTL_SGE];
2614 dma_addr_t buf_handle = 0;
2615 int error = 0, i;
2616 void *sense = NULL;
2617 dma_addr_t sense_handle;
2618 u32 *sense_ptr;
2619
2620 memset(kbuff_arr, 0, sizeof(kbuff_arr));
2621
2622 if (ioc->sge_count > MAX_IOCTL_SGE) {
2623 printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n",
2624 ioc->sge_count, MAX_IOCTL_SGE);
2625 return -EINVAL;
2626 }
2627
2628 cmd = megasas_get_cmd(instance);
2629 if (!cmd) {
2630 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
2631 return -ENOMEM;
2632 }
2633
2634 /*
2635 * User's IOCTL packet has 2 frames (maximum). Copy those two
2636 * frames into our cmd's frames. cmd->frame's context will get
2637 * overwritten when we copy from user's frames. So set that value
2638 * alone separately
2639 */
2640 memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
2641 cmd->frame->hdr.context = cmd->index;
2642
2643 /*
2644 * The management interface between applications and the fw uses
2645 * MFI frames. E.g, RAID configuration changes, LD property changes
2646 * etc are accomplishes through different kinds of MFI frames. The
2647 * driver needs to care only about substituting user buffers with
2648 * kernel buffers in SGLs. The location of SGL is embedded in the
2649 * struct iocpacket itself.
2650 */
2651 kern_sge32 = (struct megasas_sge32 *)
2652 ((unsigned long)cmd->frame + ioc->sgl_off);
2653
2654 /*
2655 * For each user buffer, create a mirror buffer and copy in
2656 */
2657 for (i = 0; i < ioc->sge_count; i++) {
2658 kbuff_arr[i] = pci_alloc_consistent(instance->pdev,
2659 ioc->sgl[i].iov_len,
2660 &buf_handle);
2661 if (!kbuff_arr[i]) {
2662 printk(KERN_DEBUG "megasas: Failed to alloc "
2663 "kernel SGL buffer for IOCTL \n");
2664 error = -ENOMEM;
2665 goto out;
2666 }
2667
2668 /*
2669 * We don't change the dma_coherent_mask, so
2670 * pci_alloc_consistent only returns 32bit addresses
2671 */
2672 kern_sge32[i].phys_addr = (u32) buf_handle;
2673 kern_sge32[i].length = ioc->sgl[i].iov_len;
2674
2675 /*
2676 * We created a kernel buffer corresponding to the
2677 * user buffer. Now copy in from the user buffer
2678 */
2679 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
2680 (u32) (ioc->sgl[i].iov_len))) {
2681 error = -EFAULT;
2682 goto out;
2683 }
2684 }
2685
2686 if (ioc->sense_len) {
2687 sense = pci_alloc_consistent(instance->pdev, ioc->sense_len,
2688 &sense_handle);
2689 if (!sense) {
2690 error = -ENOMEM;
2691 goto out;
2692 }
2693
2694 sense_ptr =
2695 (u32 *) ((unsigned long)cmd->frame + ioc->sense_off);
2696 *sense_ptr = sense_handle;
2697 }
2698
2699 /*
2700 * Set the sync_cmd flag so that the ISR knows not to complete this
2701 * cmd to the SCSI mid-layer
2702 */
2703 cmd->sync_cmd = 1;
2704 megasas_issue_blocked_cmd(instance, cmd);
2705 cmd->sync_cmd = 0;
2706
2707 /*
2708 * copy out the kernel buffers to user buffers
2709 */
2710 for (i = 0; i < ioc->sge_count; i++) {
2711 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
2712 ioc->sgl[i].iov_len)) {
2713 error = -EFAULT;
2714 goto out;
2715 }
2716 }
2717
2718 /*
2719 * copy out the sense
2720 */
2721 if (ioc->sense_len) {
2722 /*
2723 * sense_ptr points to the location that has the user
2724 * sense buffer address
2725 */
2726 sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
2727 ioc->sense_off);
2728
2729 if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
2730 sense, ioc->sense_len)) {
2731 error = -EFAULT;
2732 goto out;
2733 }
2734 }
2735
2736 /*
2737 * copy the status codes returned by the fw
2738 */
2739 if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
2740 &cmd->frame->hdr.cmd_status, sizeof(u8))) {
2741 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
2742 error = -EFAULT;
2743 }
2744
2745 out:
2746 if (sense) {
2747 pci_free_consistent(instance->pdev, ioc->sense_len,
2748 sense, sense_handle);
2749 }
2750
2751 for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
2752 pci_free_consistent(instance->pdev,
2753 kern_sge32[i].length,
2754 kbuff_arr[i], kern_sge32[i].phys_addr);
2755 }
2756
2757 megasas_return_cmd(instance, cmd);
2758 return error;
2759}
2760
2761static struct megasas_instance *megasas_lookup_instance(u16 host_no)
2762{
2763 int i;
2764
2765 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
2766
2767 if ((megasas_mgmt_info.instance[i]) &&
2768 (megasas_mgmt_info.instance[i]->host->host_no == host_no))
2769 return megasas_mgmt_info.instance[i];
2770 }
2771
2772 return NULL;
2773}
2774
2775static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
2776{
2777 struct megasas_iocpacket __user *user_ioc =
2778 (struct megasas_iocpacket __user *)arg;
2779 struct megasas_iocpacket *ioc;
2780 struct megasas_instance *instance;
2781 int error;
2782
2783 ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
2784 if (!ioc)
2785 return -ENOMEM;
2786
2787 if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
2788 error = -EFAULT;
2789 goto out_kfree_ioc;
2790 }
2791
2792 instance = megasas_lookup_instance(ioc->host_no);
2793 if (!instance) {
2794 error = -ENODEV;
2795 goto out_kfree_ioc;
2796 }
2797
2798 /*
2799 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
2800 */
2801 if (down_interruptible(&instance->ioctl_sem)) {
2802 error = -ERESTARTSYS;
2803 goto out_kfree_ioc;
2804 }
2805 error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
2806 up(&instance->ioctl_sem);
2807
2808 out_kfree_ioc:
2809 kfree(ioc);
2810 return error;
2811}
2812
2813static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
2814{
2815 struct megasas_instance *instance;
2816 struct megasas_aen aen;
2817 int error;
2818
2819 if (file->private_data != file) {
2820 printk(KERN_DEBUG "megasas: fasync_helper was not "
2821 "called first\n");
2822 return -EINVAL;
2823 }
2824
2825 if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
2826 return -EFAULT;
2827
2828 instance = megasas_lookup_instance(aen.host_no);
2829
2830 if (!instance)
2831 return -ENODEV;
2832
2833 down(&instance->aen_mutex);
2834 error = megasas_register_aen(instance, aen.seq_num,
2835 aen.class_locale_word);
2836 up(&instance->aen_mutex);
2837 return error;
2838}
2839
2840/**
2841 * megasas_mgmt_ioctl - char node ioctl entry point
2842 */
2843static long
2844megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2845{
2846 switch (cmd) {
2847 case MEGASAS_IOC_FIRMWARE:
2848 return megasas_mgmt_ioctl_fw(file, arg);
2849
2850 case MEGASAS_IOC_GET_AEN:
2851 return megasas_mgmt_ioctl_aen(file, arg);
2852 }
2853
2854 return -ENOTTY;
2855}
2856
2857#ifdef CONFIG_COMPAT
2858static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
2859{
2860 struct compat_megasas_iocpacket __user *cioc =
2861 (struct compat_megasas_iocpacket __user *)arg;
2862 struct megasas_iocpacket __user *ioc =
2863 compat_alloc_user_space(sizeof(struct megasas_iocpacket));
2864 int i;
2865 int error = 0;
2866
2867 clear_user(ioc, sizeof(*ioc));
2868
2869 if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
2870 copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
2871 copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
2872 copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
2873 copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
2874 copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
2875 return -EFAULT;
2876
2877 for (i = 0; i < MAX_IOCTL_SGE; i++) {
2878 compat_uptr_t ptr;
2879
2880 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
2881 put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
2882 copy_in_user(&ioc->sgl[i].iov_len,
2883 &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
2884 return -EFAULT;
2885 }
2886
2887 error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
2888
2889 if (copy_in_user(&cioc->frame.hdr.cmd_status,
2890 &ioc->frame.hdr.cmd_status, sizeof(u8))) {
2891 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
2892 return -EFAULT;
2893 }
2894 return error;
2895}
2896
2897static long
2898megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
2899 unsigned long arg)
2900{
2901 switch (cmd) {
Sumant Patrocb59aa62006-01-25 11:53:25 -08002902 case MEGASAS_IOC_FIRMWARE32:
2903 return megasas_mgmt_compat_ioctl_fw(file, arg);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002904 case MEGASAS_IOC_GET_AEN:
2905 return megasas_mgmt_ioctl_aen(file, arg);
2906 }
2907
2908 return -ENOTTY;
2909}
2910#endif
2911
2912/*
2913 * File operations structure for management interface
2914 */
2915static struct file_operations megasas_mgmt_fops = {
2916 .owner = THIS_MODULE,
2917 .open = megasas_mgmt_open,
2918 .release = megasas_mgmt_release,
2919 .fasync = megasas_mgmt_fasync,
2920 .unlocked_ioctl = megasas_mgmt_ioctl,
2921#ifdef CONFIG_COMPAT
2922 .compat_ioctl = megasas_mgmt_compat_ioctl,
2923#endif
2924};
2925
2926/*
2927 * PCI hotplug support registration structure
2928 */
2929static struct pci_driver megasas_pci_driver = {
2930
2931 .name = "megaraid_sas",
2932 .id_table = megasas_pci_table,
2933 .probe = megasas_probe_one,
2934 .remove = __devexit_p(megasas_detach_one),
2935 .shutdown = megasas_shutdown,
2936};
2937
2938/*
2939 * Sysfs driver attributes
2940 */
2941static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
2942{
2943 return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
2944 MEGASAS_VERSION);
2945}
2946
2947static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
2948
2949static ssize_t
2950megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
2951{
2952 return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
2953 MEGASAS_RELDATE);
2954}
2955
2956static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
2957 NULL);
2958
Sumant Patro658dced2006-10-03 13:09:14 -07002959static ssize_t
2960megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
2961{
2962 return sprintf(buf,"%u",megasas_dbg_lvl);
2963}
2964
2965static ssize_t
2966megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count)
2967{
2968 int retval = count;
2969 if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){
2970 printk(KERN_ERR "megasas: could not set dbg_lvl\n");
2971 retval = -EINVAL;
2972 }
2973 return retval;
2974}
2975
2976static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUGO, megasas_sysfs_show_dbg_lvl,
2977 megasas_sysfs_set_dbg_lvl);
2978
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04002979/**
2980 * megasas_init - Driver load entry point
2981 */
2982static int __init megasas_init(void)
2983{
2984 int rval;
2985
2986 /*
2987 * Announce driver version and other information
2988 */
2989 printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
2990 MEGASAS_EXT_VERSION);
2991
2992 memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
2993
2994 /*
2995 * Register character device node
2996 */
2997 rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
2998
2999 if (rval < 0) {
3000 printk(KERN_DEBUG "megasas: failed to open device node\n");
3001 return rval;
3002 }
3003
3004 megasas_mgmt_majorno = rval;
3005
3006 /*
3007 * Register ourselves as PCI hotplug module
3008 */
Michal Piotrowski4041b9c2006-08-17 13:28:22 +00003009 rval = pci_register_driver(&megasas_pci_driver);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04003010
3011 if (rval) {
3012 printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
3013 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
3014 }
3015
3016 driver_create_file(&megasas_pci_driver.driver, &driver_attr_version);
3017 driver_create_file(&megasas_pci_driver.driver,
3018 &driver_attr_release_date);
Sumant Patro658dced2006-10-03 13:09:14 -07003019 driver_create_file(&megasas_pci_driver.driver,
3020 &driver_attr_dbg_lvl);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04003021
3022 return rval;
3023}
3024
3025/**
3026 * megasas_exit - Driver unload entry point
3027 */
3028static void __exit megasas_exit(void)
3029{
3030 driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
3031 driver_remove_file(&megasas_pci_driver.driver,
3032 &driver_attr_release_date);
Sumant Patro658dced2006-10-03 13:09:14 -07003033 driver_remove_file(&megasas_pci_driver.driver,
3034 &driver_attr_dbg_lvl);
Bagalkote, Sreenivasc4a3e0a2005-09-20 17:46:58 -04003035
3036 pci_unregister_driver(&megasas_pci_driver);
3037 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
3038}
3039
3040module_init(megasas_init);
3041module_exit(megasas_exit);