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[PATCH] irq-flags: scsi: Use the new IRQF_ constants
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / scsi / megaraid / megaraid_sas.c
blobe5c017ccda595cf14804593c6b62ddc5bd16d3e8
1 /*
2 *
3 * Linux MegaRAID driver for SAS based RAID controllers
4 *
5 * Copyright (c) 2003-2005 LSI Logic Corporation.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * FILE : megaraid_sas.c
13 * Version : v00.00.02.04
14 *
15 * Authors:
16 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
17 * Sumant Patro <Sumant.Patro@lsil.com>
18 *
19 * List of supported controllers
20 *
21 * OEM Product Name VID DID SSVID SSID
22 * --- ------------ --- --- ---- ----
23 */
24
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/pci.h>
28 #include <linux/list.h>
29 #include <linux/moduleparam.h>
30 #include <linux/module.h>
31 #include <linux/spinlock.h>
32 #include <linux/interrupt.h>
33 #include <linux/delay.h>
34 #include <linux/uio.h>
35 #include <asm/uaccess.h>
36 #include <linux/fs.h>
37 #include <linux/compat.h>
38 #include <linux/mutex.h>
39
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_host.h>
44 #include "megaraid_sas.h"
45
46 MODULE_LICENSE("GPL");
47 MODULE_VERSION(MEGASAS_VERSION);
48 MODULE_AUTHOR("sreenivas.bagalkote@lsil.com");
49 MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver");
50
51 /*
52 * PCI ID table for all supported controllers
53 */
54 static struct pci_device_id megasas_pci_table[] = {
55
56 {
57 PCI_VENDOR_ID_LSI_LOGIC,
58 PCI_DEVICE_ID_LSI_SAS1064R, // xscale IOP
59 PCI_ANY_ID,
60 PCI_ANY_ID,
61 },
62 {
63 PCI_VENDOR_ID_LSI_LOGIC,
64 PCI_DEVICE_ID_LSI_SAS1078R, // ppc IOP
65 PCI_ANY_ID,
66 PCI_ANY_ID,
67 },
68 {
69 PCI_VENDOR_ID_DELL,
70 PCI_DEVICE_ID_DELL_PERC5, // xscale IOP
71 PCI_ANY_ID,
72 PCI_ANY_ID,
73 },
74 {0} /* Terminating entry */
75 };
76
77 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
78
79 static int megasas_mgmt_majorno;
80 static struct megasas_mgmt_info megasas_mgmt_info;
81 static struct fasync_struct *megasas_async_queue;
82 static DEFINE_MUTEX(megasas_async_queue_mutex);
83
84 /**
85 * megasas_get_cmd - Get a command from the free pool
86 * @instance: Adapter soft state
87 *
88 * Returns a free command from the pool
89 */
90 static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
91 *instance)
92 {
93 unsigned long flags;
94 struct megasas_cmd *cmd = NULL;
95
96 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
97
98 if (!list_empty(&instance->cmd_pool)) {
99 cmd = list_entry((&instance->cmd_pool)->next,
100 struct megasas_cmd, list);
101 list_del_init(&cmd->list);
102 } else {
103 printk(KERN_ERR "megasas: Command pool empty!\n");
104 }
105
106 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
107 return cmd;
108 }
109
110 /**
111 * megasas_return_cmd - Return a cmd to free command pool
112 * @instance: Adapter soft state
113 * @cmd: Command packet to be returned to free command pool
114 */
115 static inline void
116 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
117 {
118 unsigned long flags;
119
120 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
121
122 cmd->scmd = NULL;
123 list_add_tail(&cmd->list, &instance->cmd_pool);
124
125 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
126 }
127
128
129 /**
130 * The following functions are defined for xscale
131 * (deviceid : 1064R, PERC5) controllers
132 */
133
134 /**
135 * megasas_enable_intr_xscale - Enables interrupts
136 * @regs: MFI register set
137 */
138 static inline void
139 megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs)
140 {
141 writel(1, &(regs)->outbound_intr_mask);
142
143 /* Dummy readl to force pci flush */
144 readl(&regs->outbound_intr_mask);
145 }
146
147 /**
148 * megasas_read_fw_status_reg_xscale - returns the current FW status value
149 * @regs: MFI register set
150 */
151 static u32
152 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
153 {
154 return readl(&(regs)->outbound_msg_0);
155 }
156 /**
157 * megasas_clear_interrupt_xscale - Check & clear interrupt
158 * @regs: MFI register set
159 */
160 static int
161 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
162 {
163 u32 status;
164 /*
165 * Check if it is our interrupt
166 */
167 status = readl(&regs->outbound_intr_status);
168
169 if (!(status & MFI_OB_INTR_STATUS_MASK)) {
170 return 1;
171 }
172
173 /*
174 * Clear the interrupt by writing back the same value
175 */
176 writel(status, &regs->outbound_intr_status);
177
178 return 0;
179 }
180
181 /**
182 * megasas_fire_cmd_xscale - Sends command to the FW
183 * @frame_phys_addr : Physical address of cmd
184 * @frame_count : Number of frames for the command
185 * @regs : MFI register set
186 */
187 static inline void
188 megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs)
189 {
190 writel((frame_phys_addr >> 3)|(frame_count),
191 &(regs)->inbound_queue_port);
192 }
193
194 static struct megasas_instance_template megasas_instance_template_xscale = {
195
196 .fire_cmd = megasas_fire_cmd_xscale,
197 .enable_intr = megasas_enable_intr_xscale,
198 .clear_intr = megasas_clear_intr_xscale,
199 .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
200 };
201
202 /**
203 * This is the end of set of functions & definitions specific
204 * to xscale (deviceid : 1064R, PERC5) controllers
205 */
206
207 /**
208 * The following functions are defined for ppc (deviceid : 0x60)
209 * controllers
210 */
211
212 /**
213 * megasas_enable_intr_ppc - Enables interrupts
214 * @regs: MFI register set
215 */
216 static inline void
217 megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs)
218 {
219 writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
220
221 writel(~0x80000004, &(regs)->outbound_intr_mask);
222
223 /* Dummy readl to force pci flush */
224 readl(&regs->outbound_intr_mask);
225 }
226
227 /**
228 * megasas_read_fw_status_reg_ppc - returns the current FW status value
229 * @regs: MFI register set
230 */
231 static u32
232 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
233 {
234 return readl(&(regs)->outbound_scratch_pad);
235 }
236
237 /**
238 * megasas_clear_interrupt_ppc - Check & clear interrupt
239 * @regs: MFI register set
240 */
241 static int
242 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
243 {
244 u32 status;
245 /*
246 * Check if it is our interrupt
247 */
248 status = readl(&regs->outbound_intr_status);
249
250 if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) {
251 return 1;
252 }
253
254 /*
255 * Clear the interrupt by writing back the same value
256 */
257 writel(status, &regs->outbound_doorbell_clear);
258
259 return 0;
260 }
261 /**
262 * megasas_fire_cmd_ppc - Sends command to the FW
263 * @frame_phys_addr : Physical address of cmd
264 * @frame_count : Number of frames for the command
265 * @regs : MFI register set
266 */
267 static inline void
268 megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs)
269 {
270 writel((frame_phys_addr | (frame_count<<1))|1,
271 &(regs)->inbound_queue_port);
272 }
273
274 static struct megasas_instance_template megasas_instance_template_ppc = {
275
276 .fire_cmd = megasas_fire_cmd_ppc,
277 .enable_intr = megasas_enable_intr_ppc,
278 .clear_intr = megasas_clear_intr_ppc,
279 .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
280 };
281
282 /**
283 * This is the end of set of functions & definitions
284 * specific to ppc (deviceid : 0x60) controllers
285 */
286
287 /**
288 * megasas_disable_intr - Disables interrupts
289 * @regs: MFI register set
290 */
291 static inline void
292 megasas_disable_intr(struct megasas_register_set __iomem * regs)
293 {
294 u32 mask = 0x1f;
295 writel(mask, &regs->outbound_intr_mask);
296
297 /* Dummy readl to force pci flush */
298 readl(&regs->outbound_intr_mask);
299 }
300
301 /**
302 * megasas_issue_polled - Issues a polling command
303 * @instance: Adapter soft state
304 * @cmd: Command packet to be issued
305 *
306 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
307 */
308 static int
309 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
310 {
311 int i;
312 u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
313
314 struct megasas_header *frame_hdr = &cmd->frame->hdr;
315
316 frame_hdr->cmd_status = 0xFF;
317 frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
318
319 /*
320 * Issue the frame using inbound queue port
321 */
322 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
323
324 /*
325 * Wait for cmd_status to change
326 */
327 for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) {
328 rmb();
329 msleep(1);
330 }
331
332 if (frame_hdr->cmd_status == 0xff)
333 return -ETIME;
334
335 return 0;
336 }
337
338 /**
339 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
340 * @instance: Adapter soft state
341 * @cmd: Command to be issued
342 *
343 * This function waits on an event for the command to be returned from ISR.
344 * Used to issue ioctl commands.
345 */
346 static int
347 megasas_issue_blocked_cmd(struct megasas_instance *instance,
348 struct megasas_cmd *cmd)
349 {
350 cmd->cmd_status = ENODATA;
351
352 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
353
354 wait_event(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA));
355
356 return 0;
357 }
358
359 /**
360 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
361 * @instance: Adapter soft state
362 * @cmd_to_abort: Previously issued cmd to be aborted
363 *
364 * MFI firmware can abort previously issued AEN comamnd (automatic event
365 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
366 * cmd and blocks till it is completed.
367 */
368 static int
369 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
370 struct megasas_cmd *cmd_to_abort)
371 {
372 struct megasas_cmd *cmd;
373 struct megasas_abort_frame *abort_fr;
374
375 cmd = megasas_get_cmd(instance);
376
377 if (!cmd)
378 return -1;
379
380 abort_fr = &cmd->frame->abort;
381
382 /*
383 * Prepare and issue the abort frame
384 */
385 abort_fr->cmd = MFI_CMD_ABORT;
386 abort_fr->cmd_status = 0xFF;
387 abort_fr->flags = 0;
388 abort_fr->abort_context = cmd_to_abort->index;
389 abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
390 abort_fr->abort_mfi_phys_addr_hi = 0;
391
392 cmd->sync_cmd = 1;
393 cmd->cmd_status = 0xFF;
394
395 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
396
397 /*
398 * Wait for this cmd to complete
399 */
400 wait_event(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF));
401
402 megasas_return_cmd(instance, cmd);
403 return 0;
404 }
405
406 /**
407 * megasas_make_sgl32 - Prepares 32-bit SGL
408 * @instance: Adapter soft state
409 * @scp: SCSI command from the mid-layer
410 * @mfi_sgl: SGL to be filled in
411 *
412 * If successful, this function returns the number of SG elements. Otherwise,
413 * it returnes -1.
414 */
415 static int
416 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
417 union megasas_sgl *mfi_sgl)
418 {
419 int i;
420 int sge_count;
421 struct scatterlist *os_sgl;
422
423 /*
424 * Return 0 if there is no data transfer
425 */
426 if (!scp->request_buffer || !scp->request_bufflen)
427 return 0;
428
429 if (!scp->use_sg) {
430 mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev,
431 scp->
432 request_buffer,
433 scp->
434 request_bufflen,
435 scp->
436 sc_data_direction);
437 mfi_sgl->sge32[0].length = scp->request_bufflen;
438
439 return 1;
440 }
441
442 os_sgl = (struct scatterlist *)scp->request_buffer;
443 sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
444 scp->sc_data_direction);
445
446 for (i = 0; i < sge_count; i++, os_sgl++) {
447 mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
448 mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
449 }
450
451 return sge_count;
452 }
453
454 /**
455 * megasas_make_sgl64 - Prepares 64-bit SGL
456 * @instance: Adapter soft state
457 * @scp: SCSI command from the mid-layer
458 * @mfi_sgl: SGL to be filled in
459 *
460 * If successful, this function returns the number of SG elements. Otherwise,
461 * it returnes -1.
462 */
463 static int
464 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
465 union megasas_sgl *mfi_sgl)
466 {
467 int i;
468 int sge_count;
469 struct scatterlist *os_sgl;
470
471 /*
472 * Return 0 if there is no data transfer
473 */
474 if (!scp->request_buffer || !scp->request_bufflen)
475 return 0;
476
477 if (!scp->use_sg) {
478 mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev,
479 scp->
480 request_buffer,
481 scp->
482 request_bufflen,
483 scp->
484 sc_data_direction);
485
486 mfi_sgl->sge64[0].length = scp->request_bufflen;
487
488 return 1;
489 }
490
491 os_sgl = (struct scatterlist *)scp->request_buffer;
492 sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
493 scp->sc_data_direction);
494
495 for (i = 0; i < sge_count; i++, os_sgl++) {
496 mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
497 mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
498 }
499
500 return sge_count;
501 }
502
503 /**
504 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
505 * @instance: Adapter soft state
506 * @scp: SCSI command
507 * @cmd: Command to be prepared in
508 *
509 * This function prepares CDB commands. These are typcially pass-through
510 * commands to the devices.
511 */
512 static int
513 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
514 struct megasas_cmd *cmd)
515 {
516 u32 sge_sz;
517 int sge_bytes;
518 u32 is_logical;
519 u32 device_id;
520 u16 flags = 0;
521 struct megasas_pthru_frame *pthru;
522
523 is_logical = MEGASAS_IS_LOGICAL(scp);
524 device_id = MEGASAS_DEV_INDEX(instance, scp);
525 pthru = (struct megasas_pthru_frame *)cmd->frame;
526
527 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
528 flags = MFI_FRAME_DIR_WRITE;
529 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
530 flags = MFI_FRAME_DIR_READ;
531 else if (scp->sc_data_direction == PCI_DMA_NONE)
532 flags = MFI_FRAME_DIR_NONE;
533
534 /*
535 * Prepare the DCDB frame
536 */
537 pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
538 pthru->cmd_status = 0x0;
539 pthru->scsi_status = 0x0;
540 pthru->target_id = device_id;
541 pthru->lun = scp->device->lun;
542 pthru->cdb_len = scp->cmd_len;
543 pthru->timeout = 0;
544 pthru->flags = flags;
545 pthru->data_xfer_len = scp->request_bufflen;
546
547 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
548
549 /*
550 * Construct SGL
551 */
552 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
553 sizeof(struct megasas_sge32);
554
555 if (IS_DMA64) {
556 pthru->flags |= MFI_FRAME_SGL64;
557 pthru->sge_count = megasas_make_sgl64(instance, scp,
558 &pthru->sgl);
559 } else
560 pthru->sge_count = megasas_make_sgl32(instance, scp,
561 &pthru->sgl);
562
563 /*
564 * Sense info specific
565 */
566 pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
567 pthru->sense_buf_phys_addr_hi = 0;
568 pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
569
570 sge_bytes = sge_sz * pthru->sge_count;
571
572 /*
573 * Compute the total number of frames this command consumes. FW uses
574 * this number to pull sufficient number of frames from host memory.
575 */
576 cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
577 ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
578
579 if (cmd->frame_count > 7)
580 cmd->frame_count = 8;
581
582 return cmd->frame_count;
583 }
584
585 /**
586 * megasas_build_ldio - Prepares IOs to logical devices
587 * @instance: Adapter soft state
588 * @scp: SCSI command
589 * @cmd: Command to to be prepared
590 *
591 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
592 */
593 static int
594 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
595 struct megasas_cmd *cmd)
596 {
597 u32 sge_sz;
598 int sge_bytes;
599 u32 device_id;
600 u8 sc = scp->cmnd[0];
601 u16 flags = 0;
602 struct megasas_io_frame *ldio;
603
604 device_id = MEGASAS_DEV_INDEX(instance, scp);
605 ldio = (struct megasas_io_frame *)cmd->frame;
606
607 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
608 flags = MFI_FRAME_DIR_WRITE;
609 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
610 flags = MFI_FRAME_DIR_READ;
611
612 /*
613 * Preare the Logical IO frame: 2nd bit is zero for all read cmds
614 */
615 ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
616 ldio->cmd_status = 0x0;
617 ldio->scsi_status = 0x0;
618 ldio->target_id = device_id;
619 ldio->timeout = 0;
620 ldio->reserved_0 = 0;
621 ldio->pad_0 = 0;
622 ldio->flags = flags;
623 ldio->start_lba_hi = 0;
624 ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
625
626 /*
627 * 6-byte READ(0x08) or WRITE(0x0A) cdb
628 */
629 if (scp->cmd_len == 6) {
630 ldio->lba_count = (u32) scp->cmnd[4];
631 ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
632 ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
633
634 ldio->start_lba_lo &= 0x1FFFFF;
635 }
636
637 /*
638 * 10-byte READ(0x28) or WRITE(0x2A) cdb
639 */
640 else if (scp->cmd_len == 10) {
641 ldio->lba_count = (u32) scp->cmnd[8] |
642 ((u32) scp->cmnd[7] << 8);
643 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
644 ((u32) scp->cmnd[3] << 16) |
645 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
646 }
647
648 /*
649 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
650 */
651 else if (scp->cmd_len == 12) {
652 ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
653 ((u32) scp->cmnd[7] << 16) |
654 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
655
656 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
657 ((u32) scp->cmnd[3] << 16) |
658 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
659 }
660
661 /*
662 * 16-byte READ(0x88) or WRITE(0x8A) cdb
663 */
664 else if (scp->cmd_len == 16) {
665 ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
666 ((u32) scp->cmnd[11] << 16) |
667 ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
668
669 ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
670 ((u32) scp->cmnd[7] << 16) |
671 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
672
673 ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
674 ((u32) scp->cmnd[3] << 16) |
675 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
676
677 }
678
679 /*
680 * Construct SGL
681 */
682 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
683 sizeof(struct megasas_sge32);
684
685 if (IS_DMA64) {
686 ldio->flags |= MFI_FRAME_SGL64;
687 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
688 } else
689 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
690
691 /*
692 * Sense info specific
693 */
694 ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
695 ldio->sense_buf_phys_addr_hi = 0;
696 ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
697
698 sge_bytes = sge_sz * ldio->sge_count;
699
700 cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
701 ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
702
703 if (cmd->frame_count > 7)
704 cmd->frame_count = 8;
705
706 return cmd->frame_count;
707 }
708
709 /**
710 * megasas_is_ldio - Checks if the cmd is for logical drive
711 * @scmd: SCSI command
712 *
713 * Called by megasas_queue_command to find out if the command to be queued
714 * is a logical drive command
715 */
716 static inline int megasas_is_ldio(struct scsi_cmnd *cmd)
717 {
718 if (!MEGASAS_IS_LOGICAL(cmd))
719 return 0;
720 switch (cmd->cmnd[0]) {
721 case READ_10:
722 case WRITE_10:
723 case READ_12:
724 case WRITE_12:
725 case READ_6:
726 case WRITE_6:
727 case READ_16:
728 case WRITE_16:
729 return 1;
730 default:
731 return 0;
732 }
733 }
734
735 /**
736 * megasas_queue_command - Queue entry point
737 * @scmd: SCSI command to be queued
738 * @done: Callback entry point
739 */
740 static int
741 megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
742 {
743 u32 frame_count;
744 struct megasas_cmd *cmd;
745 struct megasas_instance *instance;
746
747 instance = (struct megasas_instance *)
748 scmd->device->host->hostdata;
749 scmd->scsi_done = done;
750 scmd->result = 0;
751
752 if (MEGASAS_IS_LOGICAL(scmd) &&
753 (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
754 scmd->result = DID_BAD_TARGET << 16;
755 goto out_done;
756 }
757
758 cmd = megasas_get_cmd(instance);
759 if (!cmd)
760 return SCSI_MLQUEUE_HOST_BUSY;
761
762 /*
763 * Logical drive command
764 */
765 if (megasas_is_ldio(scmd))
766 frame_count = megasas_build_ldio(instance, scmd, cmd);
767 else
768 frame_count = megasas_build_dcdb(instance, scmd, cmd);
769
770 if (!frame_count)
771 goto out_return_cmd;
772
773 cmd->scmd = scmd;
774
775 /*
776 * Issue the command to the FW
777 */
778 atomic_inc(&instance->fw_outstanding);
779
780 instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set);
781
782 return 0;
783
784 out_return_cmd:
785 megasas_return_cmd(instance, cmd);
786 out_done:
787 done(scmd);
788 return 0;
789 }
790
791 static int megasas_slave_configure(struct scsi_device *sdev)
792 {
793 /*
794 * Don't export physical disk devices to the disk driver.
795 *
796 * FIXME: Currently we don't export them to the midlayer at all.
797 * That will be fixed once LSI engineers have audited the
798 * firmware for possible issues.
799 */
800 if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK)
801 return -ENXIO;
802
803 /*
804 * The RAID firmware may require extended timeouts.
805 */
806 if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
807 sdev->timeout = 90 * HZ;
808 return 0;
809 }
810
811 /**
812 * megasas_wait_for_outstanding - Wait for all outstanding cmds
813 * @instance: Adapter soft state
814 *
815 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
816 * complete all its outstanding commands. Returns error if one or more IOs
817 * are pending after this time period. It also marks the controller dead.
818 */
819 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
820 {
821 int i;
822 u32 wait_time = MEGASAS_RESET_WAIT_TIME;
823
824 for (i = 0; i < wait_time; i++) {
825
826 int outstanding = atomic_read(&instance->fw_outstanding);
827
828 if (!outstanding)
829 break;
830
831 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
832 printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
833 "commands to complete\n",i,outstanding);
834 }
835
836 msleep(1000);
837 }
838
839 if (atomic_read(&instance->fw_outstanding)) {
840 instance->hw_crit_error = 1;
841 return FAILED;
842 }
843
844 return SUCCESS;
845 }
846
847 /**
848 * megasas_generic_reset - Generic reset routine
849 * @scmd: Mid-layer SCSI command
850 *
851 * This routine implements a generic reset handler for device, bus and host
852 * reset requests. Device, bus and host specific reset handlers can use this
853 * function after they do their specific tasks.
854 */
855 static int megasas_generic_reset(struct scsi_cmnd *scmd)
856 {
857 int ret_val;
858 struct megasas_instance *instance;
859
860 instance = (struct megasas_instance *)scmd->device->host->hostdata;
861
862 scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n",
863 scmd->serial_number, scmd->cmnd[0]);
864
865 if (instance->hw_crit_error) {
866 printk(KERN_ERR "megasas: cannot recover from previous reset "
867 "failures\n");
868 return FAILED;
869 }
870
871 ret_val = megasas_wait_for_outstanding(instance);
872 if (ret_val == SUCCESS)
873 printk(KERN_NOTICE "megasas: reset successful \n");
874 else
875 printk(KERN_ERR "megasas: failed to do reset\n");
876
877 return ret_val;
878 }
879
880 /**
881 * megasas_reset_device - Device reset handler entry point
882 */
883 static int megasas_reset_device(struct scsi_cmnd *scmd)
884 {
885 int ret;
886
887 /*
888 * First wait for all commands to complete
889 */
890 ret = megasas_generic_reset(scmd);
891
892 return ret;
893 }
894
895 /**
896 * megasas_reset_bus_host - Bus & host reset handler entry point
897 */
898 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
899 {
900 int ret;
901
902 /*
903 * First wait for all commands to complete
904 */
905 ret = megasas_generic_reset(scmd);
906
907 return ret;
908 }
909
910 /**
911 * megasas_service_aen - Processes an event notification
912 * @instance: Adapter soft state
913 * @cmd: AEN command completed by the ISR
914 *
915 * For AEN, driver sends a command down to FW that is held by the FW till an
916 * event occurs. When an event of interest occurs, FW completes the command
917 * that it was previously holding.
918 *
919 * This routines sends SIGIO signal to processes that have registered with the
920 * driver for AEN.
921 */
922 static void
923 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
924 {
925 /*
926 * Don't signal app if it is just an aborted previously registered aen
927 */
928 if (!cmd->abort_aen)
929 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
930 else
931 cmd->abort_aen = 0;
932
933 instance->aen_cmd = NULL;
934 megasas_return_cmd(instance, cmd);
935 }
936
937 /*
938 * Scsi host template for megaraid_sas driver
939 */
940 static struct scsi_host_template megasas_template = {
941
942 .module = THIS_MODULE,
943 .name = "LSI Logic SAS based MegaRAID driver",
944 .proc_name = "megaraid_sas",
945 .slave_configure = megasas_slave_configure,
946 .queuecommand = megasas_queue_command,
947 .eh_device_reset_handler = megasas_reset_device,
948 .eh_bus_reset_handler = megasas_reset_bus_host,
949 .eh_host_reset_handler = megasas_reset_bus_host,
950 .use_clustering = ENABLE_CLUSTERING,
951 };
952
953 /**
954 * megasas_complete_int_cmd - Completes an internal command
955 * @instance: Adapter soft state
956 * @cmd: Command to be completed
957 *
958 * The megasas_issue_blocked_cmd() function waits for a command to complete
959 * after it issues a command. This function wakes up that waiting routine by
960 * calling wake_up() on the wait queue.
961 */
962 static void
963 megasas_complete_int_cmd(struct megasas_instance *instance,
964 struct megasas_cmd *cmd)
965 {
966 cmd->cmd_status = cmd->frame->io.cmd_status;
967
968 if (cmd->cmd_status == ENODATA) {
969 cmd->cmd_status = 0;
970 }
971 wake_up(&instance->int_cmd_wait_q);
972 }
973
974 /**
975 * megasas_complete_abort - Completes aborting a command
976 * @instance: Adapter soft state
977 * @cmd: Cmd that was issued to abort another cmd
978 *
979 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
980 * after it issues an abort on a previously issued command. This function
981 * wakes up all functions waiting on the same wait queue.
982 */
983 static void
984 megasas_complete_abort(struct megasas_instance *instance,
985 struct megasas_cmd *cmd)
986 {
987 if (cmd->sync_cmd) {
988 cmd->sync_cmd = 0;
989 cmd->cmd_status = 0;
990 wake_up(&instance->abort_cmd_wait_q);
991 }
992
993 return;
994 }
995
996 /**
997 * megasas_unmap_sgbuf - Unmap SG buffers
998 * @instance: Adapter soft state
999 * @cmd: Completed command
1000 */
1001 static void
1002 megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd)
1003 {
1004 dma_addr_t buf_h;
1005 u8 opcode;
1006
1007 if (cmd->scmd->use_sg) {
1008 pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer,
1009 cmd->scmd->use_sg, cmd->scmd->sc_data_direction);
1010 return;
1011 }
1012
1013 if (!cmd->scmd->request_bufflen)
1014 return;
1015
1016 opcode = cmd->frame->hdr.cmd;
1017
1018 if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) {
1019 if (IS_DMA64)
1020 buf_h = cmd->frame->io.sgl.sge64[0].phys_addr;
1021 else
1022 buf_h = cmd->frame->io.sgl.sge32[0].phys_addr;
1023 } else {
1024 if (IS_DMA64)
1025 buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr;
1026 else
1027 buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr;
1028 }
1029
1030 pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen,
1031 cmd->scmd->sc_data_direction);
1032 return;
1033 }
1034
1035 /**
1036 * megasas_complete_cmd - Completes a command
1037 * @instance: Adapter soft state
1038 * @cmd: Command to be completed
1039 * @alt_status: If non-zero, use this value as status to
1040 * SCSI mid-layer instead of the value returned
1041 * by the FW. This should be used if caller wants
1042 * an alternate status (as in the case of aborted
1043 * commands)
1044 */
1045 static void
1046 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
1047 u8 alt_status)
1048 {
1049 int exception = 0;
1050 struct megasas_header *hdr = &cmd->frame->hdr;
1051
1052 if (cmd->scmd) {
1053 cmd->scmd->SCp.ptr = (char *)0;
1054 }
1055
1056 switch (hdr->cmd) {
1057
1058 case MFI_CMD_PD_SCSI_IO:
1059 case MFI_CMD_LD_SCSI_IO:
1060
1061 /*
1062 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
1063 * issued either through an IO path or an IOCTL path. If it
1064 * was via IOCTL, we will send it to internal completion.
1065 */
1066 if (cmd->sync_cmd) {
1067 cmd->sync_cmd = 0;
1068 megasas_complete_int_cmd(instance, cmd);
1069 break;
1070 }
1071
1072 case MFI_CMD_LD_READ:
1073 case MFI_CMD_LD_WRITE:
1074
1075 if (alt_status) {
1076 cmd->scmd->result = alt_status << 16;
1077 exception = 1;
1078 }
1079
1080 if (exception) {
1081
1082 atomic_dec(&instance->fw_outstanding);
1083
1084 megasas_unmap_sgbuf(instance, cmd);
1085 cmd->scmd->scsi_done(cmd->scmd);
1086 megasas_return_cmd(instance, cmd);
1087
1088 break;
1089 }
1090
1091 switch (hdr->cmd_status) {
1092
1093 case MFI_STAT_OK:
1094 cmd->scmd->result = DID_OK << 16;
1095 break;
1096
1097 case MFI_STAT_SCSI_IO_FAILED:
1098 case MFI_STAT_LD_INIT_IN_PROGRESS:
1099 cmd->scmd->result =
1100 (DID_ERROR << 16) | hdr->scsi_status;
1101 break;
1102
1103 case MFI_STAT_SCSI_DONE_WITH_ERROR:
1104
1105 cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
1106
1107 if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
1108 memset(cmd->scmd->sense_buffer, 0,
1109 SCSI_SENSE_BUFFERSIZE);
1110 memcpy(cmd->scmd->sense_buffer, cmd->sense,
1111 hdr->sense_len);
1112
1113 cmd->scmd->result |= DRIVER_SENSE << 24;
1114 }
1115
1116 break;
1117
1118 case MFI_STAT_LD_OFFLINE:
1119 case MFI_STAT_DEVICE_NOT_FOUND:
1120 cmd->scmd->result = DID_BAD_TARGET << 16;
1121 break;
1122
1123 default:
1124 printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
1125 hdr->cmd_status);
1126 cmd->scmd->result = DID_ERROR << 16;
1127 break;
1128 }
1129
1130 atomic_dec(&instance->fw_outstanding);
1131
1132 megasas_unmap_sgbuf(instance, cmd);
1133 cmd->scmd->scsi_done(cmd->scmd);
1134 megasas_return_cmd(instance, cmd);
1135
1136 break;
1137
1138 case MFI_CMD_SMP:
1139 case MFI_CMD_STP:
1140 case MFI_CMD_DCMD:
1141
1142 /*
1143 * See if got an event notification
1144 */
1145 if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
1146 megasas_service_aen(instance, cmd);
1147 else
1148 megasas_complete_int_cmd(instance, cmd);
1149
1150 break;
1151
1152 case MFI_CMD_ABORT:
1153 /*
1154 * Cmd issued to abort another cmd returned
1155 */
1156 megasas_complete_abort(instance, cmd);
1157 break;
1158
1159 default:
1160 printk("megasas: Unknown command completed! [0x%X]\n",
1161 hdr->cmd);
1162 break;
1163 }
1164 }
1165
1166 /**
1167 * megasas_deplete_reply_queue - Processes all completed commands
1168 * @instance: Adapter soft state
1169 * @alt_status: Alternate status to be returned to
1170 * SCSI mid-layer instead of the status
1171 * returned by the FW
1172 */
1173 static int
1174 megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status)
1175 {
1176 u32 producer;
1177 u32 consumer;
1178 u32 context;
1179 struct megasas_cmd *cmd;
1180
1181 /*
1182 * Check if it is our interrupt
1183 * Clear the interrupt
1184 */
1185 if(instance->instancet->clear_intr(instance->reg_set))
1186 return IRQ_NONE;
1187
1188 producer = *instance->producer;
1189 consumer = *instance->consumer;
1190
1191 while (consumer != producer) {
1192 context = instance->reply_queue[consumer];
1193
1194 cmd = instance->cmd_list[context];
1195
1196 megasas_complete_cmd(instance, cmd, alt_status);
1197
1198 consumer++;
1199 if (consumer == (instance->max_fw_cmds + 1)) {
1200 consumer = 0;
1201 }
1202 }
1203
1204 *instance->consumer = producer;
1205
1206 return IRQ_HANDLED;
1207 }
1208
1209 /**
1210 * megasas_isr - isr entry point
1211 */
1212 static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs)
1213 {
1214 return megasas_deplete_reply_queue((struct megasas_instance *)devp,
1215 DID_OK);
1216 }
1217
1218 /**
1219 * megasas_transition_to_ready - Move the FW to READY state
1220 * @instance: Adapter soft state
1221 *
1222 * During the initialization, FW passes can potentially be in any one of
1223 * several possible states. If the FW in operational, waiting-for-handshake
1224 * states, driver must take steps to bring it to ready state. Otherwise, it
1225 * has to wait for the ready state.
1226 */
1227 static int
1228 megasas_transition_to_ready(struct megasas_instance* instance)
1229 {
1230 int i;
1231 u8 max_wait;
1232 u32 fw_state;
1233 u32 cur_state;
1234
1235 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
1236
1237 while (fw_state != MFI_STATE_READY) {
1238
1239 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
1240 " state\n");
1241 switch (fw_state) {
1242
1243 case MFI_STATE_FAULT:
1244
1245 printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
1246 return -ENODEV;
1247
1248 case MFI_STATE_WAIT_HANDSHAKE:
1249 /*
1250 * Set the CLR bit in inbound doorbell
1251 */
1252 writel(MFI_INIT_CLEAR_HANDSHAKE,
1253 &instance->reg_set->inbound_doorbell);
1254
1255 max_wait = 2;
1256 cur_state = MFI_STATE_WAIT_HANDSHAKE;
1257 break;
1258
1259 case MFI_STATE_OPERATIONAL:
1260 /*
1261 * Bring it to READY state; assuming max wait 2 secs
1262 */
1263 megasas_disable_intr(instance->reg_set);
1264 writel(MFI_INIT_READY, &instance->reg_set->inbound_doorbell);
1265
1266 max_wait = 10;
1267 cur_state = MFI_STATE_OPERATIONAL;
1268 break;
1269
1270 case MFI_STATE_UNDEFINED:
1271 /*
1272 * This state should not last for more than 2 seconds
1273 */
1274 max_wait = 2;
1275 cur_state = MFI_STATE_UNDEFINED;
1276 break;
1277
1278 case MFI_STATE_BB_INIT:
1279 max_wait = 2;
1280 cur_state = MFI_STATE_BB_INIT;
1281 break;
1282
1283 case MFI_STATE_FW_INIT:
1284 max_wait = 20;
1285 cur_state = MFI_STATE_FW_INIT;
1286 break;
1287
1288 case MFI_STATE_FW_INIT_2:
1289 max_wait = 20;
1290 cur_state = MFI_STATE_FW_INIT_2;
1291 break;
1292
1293 case MFI_STATE_DEVICE_SCAN:
1294 max_wait = 20;
1295 cur_state = MFI_STATE_DEVICE_SCAN;
1296 break;
1297
1298 case MFI_STATE_FLUSH_CACHE:
1299 max_wait = 20;
1300 cur_state = MFI_STATE_FLUSH_CACHE;
1301 break;
1302
1303 default:
1304 printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
1305 fw_state);
1306 return -ENODEV;
1307 }
1308
1309 /*
1310 * The cur_state should not last for more than max_wait secs
1311 */
1312 for (i = 0; i < (max_wait * 1000); i++) {
1313 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
1314 MFI_STATE_MASK ;
1315
1316 if (fw_state == cur_state) {
1317 msleep(1);
1318 } else
1319 break;
1320 }
1321
1322 /*
1323 * Return error if fw_state hasn't changed after max_wait
1324 */
1325 if (fw_state == cur_state) {
1326 printk(KERN_DEBUG "FW state [%d] hasn't changed "
1327 "in %d secs\n", fw_state, max_wait);
1328 return -ENODEV;
1329 }
1330 };
1331
1332 return 0;
1333 }
1334
1335 /**
1336 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
1337 * @instance: Adapter soft state
1338 */
1339 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
1340 {
1341 int i;
1342 u32 max_cmd = instance->max_fw_cmds;
1343 struct megasas_cmd *cmd;
1344
1345 if (!instance->frame_dma_pool)
1346 return;
1347
1348 /*
1349 * Return all frames to pool
1350 */
1351 for (i = 0; i < max_cmd; i++) {
1352
1353 cmd = instance->cmd_list[i];
1354
1355 if (cmd->frame)
1356 pci_pool_free(instance->frame_dma_pool, cmd->frame,
1357 cmd->frame_phys_addr);
1358
1359 if (cmd->sense)
1360 pci_pool_free(instance->sense_dma_pool, cmd->frame,
1361 cmd->sense_phys_addr);
1362 }
1363
1364 /*
1365 * Now destroy the pool itself
1366 */
1367 pci_pool_destroy(instance->frame_dma_pool);
1368 pci_pool_destroy(instance->sense_dma_pool);
1369
1370 instance->frame_dma_pool = NULL;
1371 instance->sense_dma_pool = NULL;
1372 }
1373
1374 /**
1375 * megasas_create_frame_pool - Creates DMA pool for cmd frames
1376 * @instance: Adapter soft state
1377 *
1378 * Each command packet has an embedded DMA memory buffer that is used for
1379 * filling MFI frame and the SG list that immediately follows the frame. This
1380 * function creates those DMA memory buffers for each command packet by using
1381 * PCI pool facility.
1382 */
1383 static int megasas_create_frame_pool(struct megasas_instance *instance)
1384 {
1385 int i;
1386 u32 max_cmd;
1387 u32 sge_sz;
1388 u32 sgl_sz;
1389 u32 total_sz;
1390 u32 frame_count;
1391 struct megasas_cmd *cmd;
1392
1393 max_cmd = instance->max_fw_cmds;
1394
1395 /*
1396 * Size of our frame is 64 bytes for MFI frame, followed by max SG
1397 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
1398 */
1399 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1400 sizeof(struct megasas_sge32);
1401
1402 /*
1403 * Calculated the number of 64byte frames required for SGL
1404 */
1405 sgl_sz = sge_sz * instance->max_num_sge;
1406 frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
1407
1408 /*
1409 * We need one extra frame for the MFI command
1410 */
1411 frame_count++;
1412
1413 total_sz = MEGAMFI_FRAME_SIZE * frame_count;
1414 /*
1415 * Use DMA pool facility provided by PCI layer
1416 */
1417 instance->frame_dma_pool = pci_pool_create("megasas frame pool",
1418 instance->pdev, total_sz, 64,
1419 0);
1420
1421 if (!instance->frame_dma_pool) {
1422 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
1423 return -ENOMEM;
1424 }
1425
1426 instance->sense_dma_pool = pci_pool_create("megasas sense pool",
1427 instance->pdev, 128, 4, 0);
1428
1429 if (!instance->sense_dma_pool) {
1430 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
1431
1432 pci_pool_destroy(instance->frame_dma_pool);
1433 instance->frame_dma_pool = NULL;
1434
1435 return -ENOMEM;
1436 }
1437
1438 /*
1439 * Allocate and attach a frame to each of the commands in cmd_list.
1440 * By making cmd->index as the context instead of the &cmd, we can
1441 * always use 32bit context regardless of the architecture
1442 */
1443 for (i = 0; i < max_cmd; i++) {
1444
1445 cmd = instance->cmd_list[i];
1446
1447 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
1448 GFP_KERNEL, &cmd->frame_phys_addr);
1449
1450 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
1451 GFP_KERNEL, &cmd->sense_phys_addr);
1452
1453 /*
1454 * megasas_teardown_frame_pool() takes care of freeing
1455 * whatever has been allocated
1456 */
1457 if (!cmd->frame || !cmd->sense) {
1458 printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
1459 megasas_teardown_frame_pool(instance);
1460 return -ENOMEM;
1461 }
1462
1463 cmd->frame->io.context = cmd->index;
1464 }
1465
1466 return 0;
1467 }
1468
1469 /**
1470 * megasas_free_cmds - Free all the cmds in the free cmd pool
1471 * @instance: Adapter soft state
1472 */
1473 static void megasas_free_cmds(struct megasas_instance *instance)
1474 {
1475 int i;
1476 /* First free the MFI frame pool */
1477 megasas_teardown_frame_pool(instance);
1478
1479 /* Free all the commands in the cmd_list */
1480 for (i = 0; i < instance->max_fw_cmds; i++)
1481 kfree(instance->cmd_list[i]);
1482
1483 /* Free the cmd_list buffer itself */
1484 kfree(instance->cmd_list);
1485 instance->cmd_list = NULL;
1486
1487 INIT_LIST_HEAD(&instance->cmd_pool);
1488 }
1489
1490 /**
1491 * megasas_alloc_cmds - Allocates the command packets
1492 * @instance: Adapter soft state
1493 *
1494 * Each command that is issued to the FW, whether IO commands from the OS or
1495 * internal commands like IOCTLs, are wrapped in local data structure called
1496 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
1497 * the FW.
1498 *
1499 * Each frame has a 32-bit field called context (tag). This context is used
1500 * to get back the megasas_cmd from the frame when a frame gets completed in
1501 * the ISR. Typically the address of the megasas_cmd itself would be used as
1502 * the context. But we wanted to keep the differences between 32 and 64 bit
1503 * systems to the mininum. We always use 32 bit integers for the context. In
1504 * this driver, the 32 bit values are the indices into an array cmd_list.
1505 * This array is used only to look up the megasas_cmd given the context. The
1506 * free commands themselves are maintained in a linked list called cmd_pool.
1507 */
1508 static int megasas_alloc_cmds(struct megasas_instance *instance)
1509 {
1510 int i;
1511 int j;
1512 u32 max_cmd;
1513 struct megasas_cmd *cmd;
1514
1515 max_cmd = instance->max_fw_cmds;
1516
1517 /*
1518 * instance->cmd_list is an array of struct megasas_cmd pointers.
1519 * Allocate the dynamic array first and then allocate individual
1520 * commands.
1521 */
1522 instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd,
1523 GFP_KERNEL);
1524
1525 if (!instance->cmd_list) {
1526 printk(KERN_DEBUG "megasas: out of memory\n");
1527 return -ENOMEM;
1528 }
1529
1530 memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd);
1531
1532 for (i = 0; i < max_cmd; i++) {
1533 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
1534 GFP_KERNEL);
1535
1536 if (!instance->cmd_list[i]) {
1537
1538 for (j = 0; j < i; j++)
1539 kfree(instance->cmd_list[j]);
1540
1541 kfree(instance->cmd_list);
1542 instance->cmd_list = NULL;
1543
1544 return -ENOMEM;
1545 }
1546 }
1547
1548 /*
1549 * Add all the commands to command pool (instance->cmd_pool)
1550 */
1551 for (i = 0; i < max_cmd; i++) {
1552 cmd = instance->cmd_list[i];
1553 memset(cmd, 0, sizeof(struct megasas_cmd));
1554 cmd->index = i;
1555 cmd->instance = instance;
1556
1557 list_add_tail(&cmd->list, &instance->cmd_pool);
1558 }
1559
1560 /*
1561 * Create a frame pool and assign one frame to each cmd
1562 */
1563 if (megasas_create_frame_pool(instance)) {
1564 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
1565 megasas_free_cmds(instance);
1566 }
1567
1568 return 0;
1569 }
1570
1571 /**
1572 * megasas_get_controller_info - Returns FW's controller structure
1573 * @instance: Adapter soft state
1574 * @ctrl_info: Controller information structure
1575 *
1576 * Issues an internal command (DCMD) to get the FW's controller structure.
1577 * This information is mainly used to find out the maximum IO transfer per
1578 * command supported by the FW.
1579 */
1580 static int
1581 megasas_get_ctrl_info(struct megasas_instance *instance,
1582 struct megasas_ctrl_info *ctrl_info)
1583 {
1584 int ret = 0;
1585 struct megasas_cmd *cmd;
1586 struct megasas_dcmd_frame *dcmd;
1587 struct megasas_ctrl_info *ci;
1588 dma_addr_t ci_h = 0;
1589
1590 cmd = megasas_get_cmd(instance);
1591
1592 if (!cmd) {
1593 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
1594 return -ENOMEM;
1595 }
1596
1597 dcmd = &cmd->frame->dcmd;
1598
1599 ci = pci_alloc_consistent(instance->pdev,
1600 sizeof(struct megasas_ctrl_info), &ci_h);
1601
1602 if (!ci) {
1603 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
1604 megasas_return_cmd(instance, cmd);
1605 return -ENOMEM;
1606 }
1607
1608 memset(ci, 0, sizeof(*ci));
1609 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1610
1611 dcmd->cmd = MFI_CMD_DCMD;
1612 dcmd->cmd_status = 0xFF;
1613 dcmd->sge_count = 1;
1614 dcmd->flags = MFI_FRAME_DIR_READ;
1615 dcmd->timeout = 0;
1616 dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
1617 dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
1618 dcmd->sgl.sge32[0].phys_addr = ci_h;
1619 dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
1620
1621 if (!megasas_issue_polled(instance, cmd)) {
1622 ret = 0;
1623 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
1624 } else {
1625 ret = -1;
1626 }
1627
1628 pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
1629 ci, ci_h);
1630
1631 megasas_return_cmd(instance, cmd);
1632 return ret;
1633 }
1634
1635 /**
1636 * megasas_init_mfi - Initializes the FW
1637 * @instance: Adapter soft state
1638 *
1639 * This is the main function for initializing MFI firmware.
1640 */
1641 static int megasas_init_mfi(struct megasas_instance *instance)
1642 {
1643 u32 context_sz;
1644 u32 reply_q_sz;
1645 u32 max_sectors_1;
1646 u32 max_sectors_2;
1647 struct megasas_register_set __iomem *reg_set;
1648
1649 struct megasas_cmd *cmd;
1650 struct megasas_ctrl_info *ctrl_info;
1651
1652 struct megasas_init_frame *init_frame;
1653 struct megasas_init_queue_info *initq_info;
1654 dma_addr_t init_frame_h;
1655 dma_addr_t initq_info_h;
1656
1657 /*
1658 * Map the message registers
1659 */
1660 instance->base_addr = pci_resource_start(instance->pdev, 0);
1661
1662 if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) {
1663 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
1664 return -EBUSY;
1665 }
1666
1667 instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
1668
1669 if (!instance->reg_set) {
1670 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
1671 goto fail_ioremap;
1672 }
1673
1674 reg_set = instance->reg_set;
1675
1676 switch(instance->pdev->device)
1677 {
1678 case PCI_DEVICE_ID_LSI_SAS1078R:
1679 instance->instancet = &megasas_instance_template_ppc;
1680 break;
1681 case PCI_DEVICE_ID_LSI_SAS1064R:
1682 case PCI_DEVICE_ID_DELL_PERC5:
1683 default:
1684 instance->instancet = &megasas_instance_template_xscale;
1685 break;
1686 }
1687
1688 /*
1689 * We expect the FW state to be READY
1690 */
1691 if (megasas_transition_to_ready(instance))
1692 goto fail_ready_state;
1693
1694 /*
1695 * Get various operational parameters from status register
1696 */
1697 instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
1698 instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
1699 0x10;
1700 /*
1701 * Create a pool of commands
1702 */
1703 if (megasas_alloc_cmds(instance))
1704 goto fail_alloc_cmds;
1705
1706 /*
1707 * Allocate memory for reply queue. Length of reply queue should
1708 * be _one_ more than the maximum commands handled by the firmware.
1709 *
1710 * Note: When FW completes commands, it places corresponding contex
1711 * values in this circular reply queue. This circular queue is a fairly
1712 * typical producer-consumer queue. FW is the producer (of completed
1713 * commands) and the driver is the consumer.
1714 */
1715 context_sz = sizeof(u32);
1716 reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
1717
1718 instance->reply_queue = pci_alloc_consistent(instance->pdev,
1719 reply_q_sz,
1720 &instance->reply_queue_h);
1721
1722 if (!instance->reply_queue) {
1723 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
1724 goto fail_reply_queue;
1725 }
1726
1727 /*
1728 * Prepare a init frame. Note the init frame points to queue info
1729 * structure. Each frame has SGL allocated after first 64 bytes. For
1730 * this frame - since we don't need any SGL - we use SGL's space as
1731 * queue info structure
1732 *
1733 * We will not get a NULL command below. We just created the pool.
1734 */
1735 cmd = megasas_get_cmd(instance);
1736
1737 init_frame = (struct megasas_init_frame *)cmd->frame;
1738 initq_info = (struct megasas_init_queue_info *)
1739 ((unsigned long)init_frame + 64);
1740
1741 init_frame_h = cmd->frame_phys_addr;
1742 initq_info_h = init_frame_h + 64;
1743
1744 memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
1745 memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
1746
1747 initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
1748 initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
1749
1750 initq_info->producer_index_phys_addr_lo = instance->producer_h;
1751 initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
1752
1753 init_frame->cmd = MFI_CMD_INIT;
1754 init_frame->cmd_status = 0xFF;
1755 init_frame->queue_info_new_phys_addr_lo = initq_info_h;
1756
1757 init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
1758
1759 /*
1760 * Issue the init frame in polled mode
1761 */
1762 if (megasas_issue_polled(instance, cmd)) {
1763 printk(KERN_DEBUG "megasas: Failed to init firmware\n");
1764 goto fail_fw_init;
1765 }
1766
1767 megasas_return_cmd(instance, cmd);
1768
1769 ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
1770
1771 /*
1772 * Compute the max allowed sectors per IO: The controller info has two
1773 * limits on max sectors. Driver should use the minimum of these two.
1774 *
1775 * 1 << stripe_sz_ops.min = max sectors per strip
1776 *
1777 * Note that older firmwares ( < FW ver 30) didn't report information
1778 * to calculate max_sectors_1. So the number ended up as zero always.
1779 */
1780 if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
1781
1782 max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
1783 ctrl_info->max_strips_per_io;
1784 max_sectors_2 = ctrl_info->max_request_size;
1785
1786 instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2)
1787 ? max_sectors_1 : max_sectors_2;
1788 } else
1789 instance->max_sectors_per_req = instance->max_num_sge *
1790 PAGE_SIZE / 512;
1791
1792 kfree(ctrl_info);
1793
1794 return 0;
1795
1796 fail_fw_init:
1797 megasas_return_cmd(instance, cmd);
1798
1799 pci_free_consistent(instance->pdev, reply_q_sz,
1800 instance->reply_queue, instance->reply_queue_h);
1801 fail_reply_queue:
1802 megasas_free_cmds(instance);
1803
1804 fail_alloc_cmds:
1805 fail_ready_state:
1806 iounmap(instance->reg_set);
1807
1808 fail_ioremap:
1809 pci_release_regions(instance->pdev);
1810
1811 return -EINVAL;
1812 }
1813
1814 /**
1815 * megasas_release_mfi - Reverses the FW initialization
1816 * @intance: Adapter soft state
1817 */
1818 static void megasas_release_mfi(struct megasas_instance *instance)
1819 {
1820 u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1);
1821
1822 pci_free_consistent(instance->pdev, reply_q_sz,
1823 instance->reply_queue, instance->reply_queue_h);
1824
1825 megasas_free_cmds(instance);
1826
1827 iounmap(instance->reg_set);
1828
1829 pci_release_regions(instance->pdev);
1830 }
1831
1832 /**
1833 * megasas_get_seq_num - Gets latest event sequence numbers
1834 * @instance: Adapter soft state
1835 * @eli: FW event log sequence numbers information
1836 *
1837 * FW maintains a log of all events in a non-volatile area. Upper layers would
1838 * usually find out the latest sequence number of the events, the seq number at
1839 * the boot etc. They would "read" all the events below the latest seq number
1840 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
1841 * number), they would subsribe to AEN (asynchronous event notification) and
1842 * wait for the events to happen.
1843 */
1844 static int
1845 megasas_get_seq_num(struct megasas_instance *instance,
1846 struct megasas_evt_log_info *eli)
1847 {
1848 struct megasas_cmd *cmd;
1849 struct megasas_dcmd_frame *dcmd;
1850 struct megasas_evt_log_info *el_info;
1851 dma_addr_t el_info_h = 0;
1852
1853 cmd = megasas_get_cmd(instance);
1854
1855 if (!cmd) {
1856 return -ENOMEM;
1857 }
1858
1859 dcmd = &cmd->frame->dcmd;
1860 el_info = pci_alloc_consistent(instance->pdev,
1861 sizeof(struct megasas_evt_log_info),
1862 &el_info_h);
1863
1864 if (!el_info) {
1865 megasas_return_cmd(instance, cmd);
1866 return -ENOMEM;
1867 }
1868
1869 memset(el_info, 0, sizeof(*el_info));
1870 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1871
1872 dcmd->cmd = MFI_CMD_DCMD;
1873 dcmd->cmd_status = 0x0;
1874 dcmd->sge_count = 1;
1875 dcmd->flags = MFI_FRAME_DIR_READ;
1876 dcmd->timeout = 0;
1877 dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
1878 dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
1879 dcmd->sgl.sge32[0].phys_addr = el_info_h;
1880 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
1881
1882 megasas_issue_blocked_cmd(instance, cmd);
1883
1884 /*
1885 * Copy the data back into callers buffer
1886 */
1887 memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
1888
1889 pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
1890 el_info, el_info_h);
1891
1892 megasas_return_cmd(instance, cmd);
1893
1894 return 0;
1895 }
1896
1897 /**
1898 * megasas_register_aen - Registers for asynchronous event notification
1899 * @instance: Adapter soft state
1900 * @seq_num: The starting sequence number
1901 * @class_locale: Class of the event
1902 *
1903 * This function subscribes for AEN for events beyond the @seq_num. It requests
1904 * to be notified if and only if the event is of type @class_locale
1905 */
1906 static int
1907 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
1908 u32 class_locale_word)
1909 {
1910 int ret_val;
1911 struct megasas_cmd *cmd;
1912 struct megasas_dcmd_frame *dcmd;
1913 union megasas_evt_class_locale curr_aen;
1914 union megasas_evt_class_locale prev_aen;
1915
1916 /*
1917 * If there an AEN pending already (aen_cmd), check if the
1918 * class_locale of that pending AEN is inclusive of the new
1919 * AEN request we currently have. If it is, then we don't have
1920 * to do anything. In other words, whichever events the current
1921 * AEN request is subscribing to, have already been subscribed
1922 * to.
1923 *
1924 * If the old_cmd is _not_ inclusive, then we have to abort
1925 * that command, form a class_locale that is superset of both
1926 * old and current and re-issue to the FW
1927 */
1928
1929 curr_aen.word = class_locale_word;
1930
1931 if (instance->aen_cmd) {
1932
1933 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
1934
1935 /*
1936 * A class whose enum value is smaller is inclusive of all
1937 * higher values. If a PROGRESS (= -1) was previously
1938 * registered, then a new registration requests for higher
1939 * classes need not be sent to FW. They are automatically
1940 * included.
1941 *
1942 * Locale numbers don't have such hierarchy. They are bitmap
1943 * values
1944 */
1945 if ((prev_aen.members.class <= curr_aen.members.class) &&
1946 !((prev_aen.members.locale & curr_aen.members.locale) ^
1947 curr_aen.members.locale)) {
1948 /*
1949 * Previously issued event registration includes
1950 * current request. Nothing to do.
1951 */
1952 return 0;
1953 } else {
1954 curr_aen.members.locale |= prev_aen.members.locale;
1955
1956 if (prev_aen.members.class < curr_aen.members.class)
1957 curr_aen.members.class = prev_aen.members.class;
1958
1959 instance->aen_cmd->abort_aen = 1;
1960 ret_val = megasas_issue_blocked_abort_cmd(instance,
1961 instance->
1962 aen_cmd);
1963
1964 if (ret_val) {
1965 printk(KERN_DEBUG "megasas: Failed to abort "
1966 "previous AEN command\n");
1967 return ret_val;
1968 }
1969 }
1970 }
1971
1972 cmd = megasas_get_cmd(instance);
1973
1974 if (!cmd)
1975 return -ENOMEM;
1976
1977 dcmd = &cmd->frame->dcmd;
1978
1979 memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
1980
1981 /*
1982 * Prepare DCMD for aen registration
1983 */
1984 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1985
1986 dcmd->cmd = MFI_CMD_DCMD;
1987 dcmd->cmd_status = 0x0;
1988 dcmd->sge_count = 1;
1989 dcmd->flags = MFI_FRAME_DIR_READ;
1990 dcmd->timeout = 0;
1991 dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
1992 dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
1993 dcmd->mbox.w[0] = seq_num;
1994 dcmd->mbox.w[1] = curr_aen.word;
1995 dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
1996 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
1997
1998 /*
1999 * Store reference to the cmd used to register for AEN. When an
2000 * application wants us to register for AEN, we have to abort this
2001 * cmd and re-register with a new EVENT LOCALE supplied by that app
2002 */
2003 instance->aen_cmd = cmd;
2004
2005 /*
2006 * Issue the aen registration frame
2007 */
2008 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
2009
2010 return 0;
2011 }
2012
2013 /**
2014 * megasas_start_aen - Subscribes to AEN during driver load time
2015 * @instance: Adapter soft state
2016 */
2017 static int megasas_start_aen(struct megasas_instance *instance)
2018 {
2019 struct megasas_evt_log_info eli;
2020 union megasas_evt_class_locale class_locale;
2021
2022 /*
2023 * Get the latest sequence number from FW
2024 */
2025 memset(&eli, 0, sizeof(eli));
2026
2027 if (megasas_get_seq_num(instance, &eli))
2028 return -1;
2029
2030 /*
2031 * Register AEN with FW for latest sequence number plus 1
2032 */
2033 class_locale.members.reserved = 0;
2034 class_locale.members.locale = MR_EVT_LOCALE_ALL;
2035 class_locale.members.class = MR_EVT_CLASS_DEBUG;
2036
2037 return megasas_register_aen(instance, eli.newest_seq_num + 1,
2038 class_locale.word);
2039 }
2040
2041 /**
2042 * megasas_io_attach - Attaches this driver to SCSI mid-layer
2043 * @instance: Adapter soft state
2044 */
2045 static int megasas_io_attach(struct megasas_instance *instance)
2046 {
2047 struct Scsi_Host *host = instance->host;
2048
2049 /*
2050 * Export parameters required by SCSI mid-layer
2051 */
2052 host->irq = instance->pdev->irq;
2053 host->unique_id = instance->unique_id;
2054 host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS;
2055 host->this_id = instance->init_id;
2056 host->sg_tablesize = instance->max_num_sge;
2057 host->max_sectors = instance->max_sectors_per_req;
2058 host->cmd_per_lun = 128;
2059 host->max_channel = MEGASAS_MAX_CHANNELS - 1;
2060 host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
2061 host->max_lun = MEGASAS_MAX_LUN;
2062 host->max_cmd_len = 16;
2063
2064 /*
2065 * Notify the mid-layer about the new controller
2066 */
2067 if (scsi_add_host(host, &instance->pdev->dev)) {
2068 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
2069 return -ENODEV;
2070 }
2071
2072 /*
2073 * Trigger SCSI to scan our drives
2074 */
2075 scsi_scan_host(host);
2076 return 0;
2077 }
2078
2079 /**
2080 * megasas_probe_one - PCI hotplug entry point
2081 * @pdev: PCI device structure
2082 * @id: PCI ids of supported hotplugged adapter
2083 */
2084 static int __devinit
2085 megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
2086 {
2087 int rval;
2088 struct Scsi_Host *host;
2089 struct megasas_instance *instance;
2090
2091 /*
2092 * Announce PCI information
2093 */
2094 printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
2095 pdev->vendor, pdev->device, pdev->subsystem_vendor,
2096 pdev->subsystem_device);
2097
2098 printk("bus %d:slot %d:func %d\n",
2099 pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
2100
2101 /*
2102 * PCI prepping: enable device set bus mastering and dma mask
2103 */
2104 rval = pci_enable_device(pdev);
2105
2106 if (rval) {
2107 return rval;
2108 }
2109
2110 pci_set_master(pdev);
2111
2112 /*
2113 * All our contollers are capable of performing 64-bit DMA
2114 */
2115 if (IS_DMA64) {
2116 if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
2117
2118 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2119 goto fail_set_dma_mask;
2120 }
2121 } else {
2122 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2123 goto fail_set_dma_mask;
2124 }
2125
2126 host = scsi_host_alloc(&megasas_template,
2127 sizeof(struct megasas_instance));
2128
2129 if (!host) {
2130 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
2131 goto fail_alloc_instance;
2132 }
2133
2134 instance = (struct megasas_instance *)host->hostdata;
2135 memset(instance, 0, sizeof(*instance));
2136
2137 instance->producer = pci_alloc_consistent(pdev, sizeof(u32),
2138 &instance->producer_h);
2139 instance->consumer = pci_alloc_consistent(pdev, sizeof(u32),
2140 &instance->consumer_h);
2141
2142 if (!instance->producer || !instance->consumer) {
2143 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2144 "producer, consumer\n");
2145 goto fail_alloc_dma_buf;
2146 }
2147
2148 *instance->producer = 0;
2149 *instance->consumer = 0;
2150
2151 instance->evt_detail = pci_alloc_consistent(pdev,
2152 sizeof(struct
2153 megasas_evt_detail),
2154 &instance->evt_detail_h);
2155
2156 if (!instance->evt_detail) {
2157 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2158 "event detail structure\n");
2159 goto fail_alloc_dma_buf;
2160 }
2161
2162 /*
2163 * Initialize locks and queues
2164 */
2165 INIT_LIST_HEAD(&instance->cmd_pool);
2166
2167 atomic_set(&instance->fw_outstanding,0);
2168
2169 init_waitqueue_head(&instance->int_cmd_wait_q);
2170 init_waitqueue_head(&instance->abort_cmd_wait_q);
2171
2172 spin_lock_init(&instance->cmd_pool_lock);
2173
2174 sema_init(&instance->aen_mutex, 1);
2175 sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
2176
2177 /*
2178 * Initialize PCI related and misc parameters
2179 */
2180 instance->pdev = pdev;
2181 instance->host = host;
2182 instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
2183 instance->init_id = MEGASAS_DEFAULT_INIT_ID;
2184
2185 /*
2186 * Initialize MFI Firmware
2187 */
2188 if (megasas_init_mfi(instance))
2189 goto fail_init_mfi;
2190
2191 /*
2192 * Register IRQ
2193 */
2194 if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED, "megasas", instance)) {
2195 printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
2196 goto fail_irq;
2197 }
2198
2199 instance->instancet->enable_intr(instance->reg_set);
2200
2201 /*
2202 * Store instance in PCI softstate
2203 */
2204 pci_set_drvdata(pdev, instance);
2205
2206 /*
2207 * Add this controller to megasas_mgmt_info structure so that it
2208 * can be exported to management applications
2209 */
2210 megasas_mgmt_info.count++;
2211 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
2212 megasas_mgmt_info.max_index++;
2213
2214 /*
2215 * Initiate AEN (Asynchronous Event Notification)
2216 */
2217 if (megasas_start_aen(instance)) {
2218 printk(KERN_DEBUG "megasas: start aen failed\n");
2219 goto fail_start_aen;
2220 }
2221
2222 /*
2223 * Register with SCSI mid-layer
2224 */
2225 if (megasas_io_attach(instance))
2226 goto fail_io_attach;
2227
2228 return 0;
2229
2230 fail_start_aen:
2231 fail_io_attach:
2232 megasas_mgmt_info.count--;
2233 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
2234 megasas_mgmt_info.max_index--;
2235
2236 pci_set_drvdata(pdev, NULL);
2237 megasas_disable_intr(instance->reg_set);
2238 free_irq(instance->pdev->irq, instance);
2239
2240 megasas_release_mfi(instance);
2241
2242 fail_irq:
2243 fail_init_mfi:
2244 fail_alloc_dma_buf:
2245 if (instance->evt_detail)
2246 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2247 instance->evt_detail,
2248 instance->evt_detail_h);
2249
2250 if (instance->producer)
2251 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2252 instance->producer_h);
2253 if (instance->consumer)
2254 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2255 instance->consumer_h);
2256 scsi_host_put(host);
2257
2258 fail_alloc_instance:
2259 fail_set_dma_mask:
2260 pci_disable_device(pdev);
2261
2262 return -ENODEV;
2263 }
2264
2265 /**
2266 * megasas_flush_cache - Requests FW to flush all its caches
2267 * @instance: Adapter soft state
2268 */
2269 static void megasas_flush_cache(struct megasas_instance *instance)
2270 {
2271 struct megasas_cmd *cmd;
2272 struct megasas_dcmd_frame *dcmd;
2273
2274 cmd = megasas_get_cmd(instance);
2275
2276 if (!cmd)
2277 return;
2278
2279 dcmd = &cmd->frame->dcmd;
2280
2281 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2282
2283 dcmd->cmd = MFI_CMD_DCMD;
2284 dcmd->cmd_status = 0x0;
2285 dcmd->sge_count = 0;
2286 dcmd->flags = MFI_FRAME_DIR_NONE;
2287 dcmd->timeout = 0;
2288 dcmd->data_xfer_len = 0;
2289 dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
2290 dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
2291
2292 megasas_issue_blocked_cmd(instance, cmd);
2293
2294 megasas_return_cmd(instance, cmd);
2295
2296 return;
2297 }
2298
2299 /**
2300 * megasas_shutdown_controller - Instructs FW to shutdown the controller
2301 * @instance: Adapter soft state
2302 */
2303 static void megasas_shutdown_controller(struct megasas_instance *instance)
2304 {
2305 struct megasas_cmd *cmd;
2306 struct megasas_dcmd_frame *dcmd;
2307
2308 cmd = megasas_get_cmd(instance);
2309
2310 if (!cmd)
2311 return;
2312
2313 if (instance->aen_cmd)
2314 megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
2315
2316 dcmd = &cmd->frame->dcmd;
2317
2318 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2319
2320 dcmd->cmd = MFI_CMD_DCMD;
2321 dcmd->cmd_status = 0x0;
2322 dcmd->sge_count = 0;
2323 dcmd->flags = MFI_FRAME_DIR_NONE;
2324 dcmd->timeout = 0;
2325 dcmd->data_xfer_len = 0;
2326 dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN;
2327
2328 megasas_issue_blocked_cmd(instance, cmd);
2329
2330 megasas_return_cmd(instance, cmd);
2331
2332 return;
2333 }
2334
2335 /**
2336 * megasas_detach_one - PCI hot"un"plug entry point
2337 * @pdev: PCI device structure
2338 */
2339 static void megasas_detach_one(struct pci_dev *pdev)
2340 {
2341 int i;
2342 struct Scsi_Host *host;
2343 struct megasas_instance *instance;
2344
2345 instance = pci_get_drvdata(pdev);
2346 host = instance->host;
2347
2348 scsi_remove_host(instance->host);
2349 megasas_flush_cache(instance);
2350 megasas_shutdown_controller(instance);
2351
2352 /*
2353 * Take the instance off the instance array. Note that we will not
2354 * decrement the max_index. We let this array be sparse array
2355 */
2356 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
2357 if (megasas_mgmt_info.instance[i] == instance) {
2358 megasas_mgmt_info.count--;
2359 megasas_mgmt_info.instance[i] = NULL;
2360
2361 break;
2362 }
2363 }
2364
2365 pci_set_drvdata(instance->pdev, NULL);
2366
2367 megasas_disable_intr(instance->reg_set);
2368
2369 free_irq(instance->pdev->irq, instance);
2370
2371 megasas_release_mfi(instance);
2372
2373 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2374 instance->evt_detail, instance->evt_detail_h);
2375
2376 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2377 instance->producer_h);
2378
2379 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2380 instance->consumer_h);
2381
2382 scsi_host_put(host);
2383
2384 pci_set_drvdata(pdev, NULL);
2385
2386 pci_disable_device(pdev);
2387
2388 return;
2389 }
2390
2391 /**
2392 * megasas_shutdown - Shutdown entry point
2393 * @device: Generic device structure
2394 */
2395 static void megasas_shutdown(struct pci_dev *pdev)
2396 {
2397 struct megasas_instance *instance = pci_get_drvdata(pdev);
2398 megasas_flush_cache(instance);
2399 }
2400
2401 /**
2402 * megasas_mgmt_open - char node "open" entry point
2403 */
2404 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
2405 {
2406 /*
2407 * Allow only those users with admin rights
2408 */
2409 if (!capable(CAP_SYS_ADMIN))
2410 return -EACCES;
2411
2412 return 0;
2413 }
2414
2415 /**
2416 * megasas_mgmt_release - char node "release" entry point
2417 */
2418 static int megasas_mgmt_release(struct inode *inode, struct file *filep)
2419 {
2420 filep->private_data = NULL;
2421 fasync_helper(-1, filep, 0, &megasas_async_queue);
2422
2423 return 0;
2424 }
2425
2426 /**
2427 * megasas_mgmt_fasync - Async notifier registration from applications
2428 *
2429 * This function adds the calling process to a driver global queue. When an
2430 * event occurs, SIGIO will be sent to all processes in this queue.
2431 */
2432 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
2433 {
2434 int rc;
2435
2436 mutex_lock(&megasas_async_queue_mutex);
2437
2438 rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
2439
2440 mutex_unlock(&megasas_async_queue_mutex);
2441
2442 if (rc >= 0) {
2443 /* For sanity check when we get ioctl */
2444 filep->private_data = filep;
2445 return 0;
2446 }
2447
2448 printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
2449
2450 return rc;
2451 }
2452
2453 /**
2454 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
2455 * @instance: Adapter soft state
2456 * @argp: User's ioctl packet
2457 */
2458 static int
2459 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
2460 struct megasas_iocpacket __user * user_ioc,
2461 struct megasas_iocpacket *ioc)
2462 {
2463 struct megasas_sge32 *kern_sge32;
2464 struct megasas_cmd *cmd;
2465 void *kbuff_arr[MAX_IOCTL_SGE];
2466 dma_addr_t buf_handle = 0;
2467 int error = 0, i;
2468 void *sense = NULL;
2469 dma_addr_t sense_handle;
2470 u32 *sense_ptr;
2471
2472 memset(kbuff_arr, 0, sizeof(kbuff_arr));
2473
2474 if (ioc->sge_count > MAX_IOCTL_SGE) {
2475 printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n",
2476 ioc->sge_count, MAX_IOCTL_SGE);
2477 return -EINVAL;
2478 }
2479
2480 cmd = megasas_get_cmd(instance);
2481 if (!cmd) {
2482 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
2483 return -ENOMEM;
2484 }
2485
2486 /*
2487 * User's IOCTL packet has 2 frames (maximum). Copy those two
2488 * frames into our cmd's frames. cmd->frame's context will get
2489 * overwritten when we copy from user's frames. So set that value
2490 * alone separately
2491 */
2492 memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
2493 cmd->frame->hdr.context = cmd->index;
2494
2495 /*
2496 * The management interface between applications and the fw uses
2497 * MFI frames. E.g, RAID configuration changes, LD property changes
2498 * etc are accomplishes through different kinds of MFI frames. The
2499 * driver needs to care only about substituting user buffers with
2500 * kernel buffers in SGLs. The location of SGL is embedded in the
2501 * struct iocpacket itself.
2502 */
2503 kern_sge32 = (struct megasas_sge32 *)
2504 ((unsigned long)cmd->frame + ioc->sgl_off);
2505
2506 /*
2507 * For each user buffer, create a mirror buffer and copy in
2508 */
2509 for (i = 0; i < ioc->sge_count; i++) {
2510 kbuff_arr[i] = pci_alloc_consistent(instance->pdev,
2511 ioc->sgl[i].iov_len,
2512 &buf_handle);
2513 if (!kbuff_arr[i]) {
2514 printk(KERN_DEBUG "megasas: Failed to alloc "
2515 "kernel SGL buffer for IOCTL \n");
2516 error = -ENOMEM;
2517 goto out;
2518 }
2519
2520 /*
2521 * We don't change the dma_coherent_mask, so
2522 * pci_alloc_consistent only returns 32bit addresses
2523 */
2524 kern_sge32[i].phys_addr = (u32) buf_handle;
2525 kern_sge32[i].length = ioc->sgl[i].iov_len;
2526
2527 /*
2528 * We created a kernel buffer corresponding to the
2529 * user buffer. Now copy in from the user buffer
2530 */
2531 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
2532 (u32) (ioc->sgl[i].iov_len))) {
2533 error = -EFAULT;
2534 goto out;
2535 }
2536 }
2537
2538 if (ioc->sense_len) {
2539 sense = pci_alloc_consistent(instance->pdev, ioc->sense_len,
2540 &sense_handle);
2541 if (!sense) {
2542 error = -ENOMEM;
2543 goto out;
2544 }
2545
2546 sense_ptr =
2547 (u32 *) ((unsigned long)cmd->frame + ioc->sense_off);
2548 *sense_ptr = sense_handle;
2549 }
2550
2551 /*
2552 * Set the sync_cmd flag so that the ISR knows not to complete this
2553 * cmd to the SCSI mid-layer
2554 */
2555 cmd->sync_cmd = 1;
2556 megasas_issue_blocked_cmd(instance, cmd);
2557 cmd->sync_cmd = 0;
2558
2559 /*
2560 * copy out the kernel buffers to user buffers
2561 */
2562 for (i = 0; i < ioc->sge_count; i++) {
2563 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
2564 ioc->sgl[i].iov_len)) {
2565 error = -EFAULT;
2566 goto out;
2567 }
2568 }
2569
2570 /*
2571 * copy out the sense
2572 */
2573 if (ioc->sense_len) {
2574 /*
2575 * sense_ptr points to the location that has the user
2576 * sense buffer address
2577 */
2578 sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
2579 ioc->sense_off);
2580
2581 if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
2582 sense, ioc->sense_len)) {
2583 error = -EFAULT;
2584 goto out;
2585 }
2586 }
2587
2588 /*
2589 * copy the status codes returned by the fw
2590 */
2591 if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
2592 &cmd->frame->hdr.cmd_status, sizeof(u8))) {
2593 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
2594 error = -EFAULT;
2595 }
2596
2597 out:
2598 if (sense) {
2599 pci_free_consistent(instance->pdev, ioc->sense_len,
2600 sense, sense_handle);
2601 }
2602
2603 for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
2604 pci_free_consistent(instance->pdev,
2605 kern_sge32[i].length,
2606 kbuff_arr[i], kern_sge32[i].phys_addr);
2607 }
2608
2609 megasas_return_cmd(instance, cmd);
2610 return error;
2611 }
2612
2613 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
2614 {
2615 int i;
2616
2617 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
2618
2619 if ((megasas_mgmt_info.instance[i]) &&
2620 (megasas_mgmt_info.instance[i]->host->host_no == host_no))
2621 return megasas_mgmt_info.instance[i];
2622 }
2623
2624 return NULL;
2625 }
2626
2627 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
2628 {
2629 struct megasas_iocpacket __user *user_ioc =
2630 (struct megasas_iocpacket __user *)arg;
2631 struct megasas_iocpacket *ioc;
2632 struct megasas_instance *instance;
2633 int error;
2634
2635 ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
2636 if (!ioc)
2637 return -ENOMEM;
2638
2639 if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
2640 error = -EFAULT;
2641 goto out_kfree_ioc;
2642 }
2643
2644 instance = megasas_lookup_instance(ioc->host_no);
2645 if (!instance) {
2646 error = -ENODEV;
2647 goto out_kfree_ioc;
2648 }
2649
2650 /*
2651 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
2652 */
2653 if (down_interruptible(&instance->ioctl_sem)) {
2654 error = -ERESTARTSYS;
2655 goto out_kfree_ioc;
2656 }
2657 error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
2658 up(&instance->ioctl_sem);
2659
2660 out_kfree_ioc:
2661 kfree(ioc);
2662 return error;
2663 }
2664
2665 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
2666 {
2667 struct megasas_instance *instance;
2668 struct megasas_aen aen;
2669 int error;
2670
2671 if (file->private_data != file) {
2672 printk(KERN_DEBUG "megasas: fasync_helper was not "
2673 "called first\n");
2674 return -EINVAL;
2675 }
2676
2677 if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
2678 return -EFAULT;
2679
2680 instance = megasas_lookup_instance(aen.host_no);
2681
2682 if (!instance)
2683 return -ENODEV;
2684
2685 down(&instance->aen_mutex);
2686 error = megasas_register_aen(instance, aen.seq_num,
2687 aen.class_locale_word);
2688 up(&instance->aen_mutex);
2689 return error;
2690 }
2691
2692 /**
2693 * megasas_mgmt_ioctl - char node ioctl entry point
2694 */
2695 static long
2696 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2697 {
2698 switch (cmd) {
2699 case MEGASAS_IOC_FIRMWARE:
2700 return megasas_mgmt_ioctl_fw(file, arg);
2701
2702 case MEGASAS_IOC_GET_AEN:
2703 return megasas_mgmt_ioctl_aen(file, arg);
2704 }
2705
2706 return -ENOTTY;
2707 }
2708
2709 #ifdef CONFIG_COMPAT
2710 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
2711 {
2712 struct compat_megasas_iocpacket __user *cioc =
2713 (struct compat_megasas_iocpacket __user *)arg;
2714 struct megasas_iocpacket __user *ioc =
2715 compat_alloc_user_space(sizeof(struct megasas_iocpacket));
2716 int i;
2717 int error = 0;
2718
2719 clear_user(ioc, sizeof(*ioc));
2720
2721 if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
2722 copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
2723 copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
2724 copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
2725 copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
2726 copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
2727 return -EFAULT;
2728
2729 for (i = 0; i < MAX_IOCTL_SGE; i++) {
2730 compat_uptr_t ptr;
2731
2732 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
2733 put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
2734 copy_in_user(&ioc->sgl[i].iov_len,
2735 &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
2736 return -EFAULT;
2737 }
2738
2739 error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
2740
2741 if (copy_in_user(&cioc->frame.hdr.cmd_status,
2742 &ioc->frame.hdr.cmd_status, sizeof(u8))) {
2743 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
2744 return -EFAULT;
2745 }
2746 return error;
2747 }
2748
2749 static long
2750 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
2751 unsigned long arg)
2752 {
2753 switch (cmd) {
2754 case MEGASAS_IOC_FIRMWARE32:
2755 return megasas_mgmt_compat_ioctl_fw(file, arg);
2756 case MEGASAS_IOC_GET_AEN:
2757 return megasas_mgmt_ioctl_aen(file, arg);
2758 }
2759
2760 return -ENOTTY;
2761 }
2762 #endif
2763
2764 /*
2765 * File operations structure for management interface
2766 */
2767 static struct file_operations megasas_mgmt_fops = {
2768 .owner = THIS_MODULE,
2769 .open = megasas_mgmt_open,
2770 .release = megasas_mgmt_release,
2771 .fasync = megasas_mgmt_fasync,
2772 .unlocked_ioctl = megasas_mgmt_ioctl,
2773 #ifdef CONFIG_COMPAT
2774 .compat_ioctl = megasas_mgmt_compat_ioctl,
2775 #endif
2776 };
2777
2778 /*
2779 * PCI hotplug support registration structure
2780 */
2781 static struct pci_driver megasas_pci_driver = {
2782
2783 .name = "megaraid_sas",
2784 .id_table = megasas_pci_table,
2785 .probe = megasas_probe_one,
2786 .remove = __devexit_p(megasas_detach_one),
2787 .shutdown = megasas_shutdown,
2788 };
2789
2790 /*
2791 * Sysfs driver attributes
2792 */
2793 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
2794 {
2795 return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
2796 MEGASAS_VERSION);
2797 }
2798
2799 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
2800
2801 static ssize_t
2802 megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
2803 {
2804 return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
2805 MEGASAS_RELDATE);
2806 }
2807
2808 static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
2809 NULL);
2810
2811 /**
2812 * megasas_init - Driver load entry point
2813 */
2814 static int __init megasas_init(void)
2815 {
2816 int rval;
2817
2818 /*
2819 * Announce driver version and other information
2820 */
2821 printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
2822 MEGASAS_EXT_VERSION);
2823
2824 memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
2825
2826 /*
2827 * Register character device node
2828 */
2829 rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
2830
2831 if (rval < 0) {
2832 printk(KERN_DEBUG "megasas: failed to open device node\n");
2833 return rval;
2834 }
2835
2836 megasas_mgmt_majorno = rval;
2837
2838 /*
2839 * Register ourselves as PCI hotplug module
2840 */
2841 rval = pci_module_init(&megasas_pci_driver);
2842
2843 if (rval) {
2844 printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
2845 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
2846 }
2847
2848 driver_create_file(&megasas_pci_driver.driver, &driver_attr_version);
2849 driver_create_file(&megasas_pci_driver.driver,
2850 &driver_attr_release_date);
2851
2852 return rval;
2853 }
2854
2855 /**
2856 * megasas_exit - Driver unload entry point
2857 */
2858 static void __exit megasas_exit(void)
2859 {
2860 driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
2861 driver_remove_file(&megasas_pci_driver.driver,
2862 &driver_attr_release_date);
2863
2864 pci_unregister_driver(&megasas_pci_driver);
2865 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
2866 }
2867
2868 module_init(megasas_init);
2869 module_exit(megasas_exit);
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