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[SCSI] remove use_sg_chaining
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / megaraid / megaraid_sas.c
blob672c759ac24d7719c3371c191d572e25bd8c4d4f
1 /*
2 *
3 * Linux MegaRAID driver for SAS based RAID controllers
4 *
5 * Copyright (c) 2003-2005 LSI 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 : v00.00.03.16-rc1
14 *
15 * Authors:
16 * (email-id : megaraidlinux@lsi.com)
17 * Sreenivas Bagalkote
18 * Sumant Patro
19 * Bo Yang
20 *
21 * List of supported controllers
22 *
23 * OEM Product Name VID DID SSVID SSID
24 * --- ------------ --- --- ---- ----
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/types.h>
29 #include <linux/pci.h>
30 #include <linux/list.h>
31 #include <linux/moduleparam.h>
32 #include <linux/module.h>
33 #include <linux/spinlock.h>
34 #include <linux/mutex.h>
35 #include <linux/interrupt.h>
36 #include <linux/delay.h>
37 #include <linux/uio.h>
38 #include <asm/uaccess.h>
39 #include <linux/fs.h>
40 #include <linux/compat.h>
41 #include <linux/blkdev.h>
42 #include <linux/mutex.h>
43
44 #include <scsi/scsi.h>
45 #include <scsi/scsi_cmnd.h>
46 #include <scsi/scsi_device.h>
47 #include <scsi/scsi_host.h>
48 #include "megaraid_sas.h"
49
50 /*
51 * poll_mode_io:1- schedule complete completion from q cmd
52 */
53 static unsigned int poll_mode_io;
54 module_param_named(poll_mode_io, poll_mode_io, int, 0);
55 MODULE_PARM_DESC(poll_mode_io,
56 "Complete cmds from IO path, (default=0)");
57
58 MODULE_LICENSE("GPL");
59 MODULE_VERSION(MEGASAS_VERSION);
60 MODULE_AUTHOR("megaraidlinux@lsi.com");
61 MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
62
63 /*
64 * PCI ID table for all supported controllers
65 */
66 static struct pci_device_id megasas_pci_table[] = {
67
68 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
69 /* xscale IOP */
70 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
71 /* ppc IOP */
72 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
73 /* xscale IOP, vega */
74 {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
75 /* xscale IOP */
76 {}
77 };
78
79 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
80
81 static int megasas_mgmt_majorno;
82 static struct megasas_mgmt_info megasas_mgmt_info;
83 static struct fasync_struct *megasas_async_queue;
84 static DEFINE_MUTEX(megasas_async_queue_mutex);
85
86 static u32 megasas_dbg_lvl;
87
88 static void
89 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
90 u8 alt_status);
91
92 /**
93 * megasas_get_cmd - Get a command from the free pool
94 * @instance: Adapter soft state
95 *
96 * Returns a free command from the pool
97 */
98 static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
99 *instance)
100 {
101 unsigned long flags;
102 struct megasas_cmd *cmd = NULL;
103
104 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
105
106 if (!list_empty(&instance->cmd_pool)) {
107 cmd = list_entry((&instance->cmd_pool)->next,
108 struct megasas_cmd, list);
109 list_del_init(&cmd->list);
110 } else {
111 printk(KERN_ERR "megasas: Command pool empty!\n");
112 }
113
114 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
115 return cmd;
116 }
117
118 /**
119 * megasas_return_cmd - Return a cmd to free command pool
120 * @instance: Adapter soft state
121 * @cmd: Command packet to be returned to free command pool
122 */
123 static inline void
124 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
125 {
126 unsigned long flags;
127
128 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
129
130 cmd->scmd = NULL;
131 list_add_tail(&cmd->list, &instance->cmd_pool);
132
133 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
134 }
135
136
137 /**
138 * The following functions are defined for xscale
139 * (deviceid : 1064R, PERC5) controllers
140 */
141
142 /**
143 * megasas_enable_intr_xscale - Enables interrupts
144 * @regs: MFI register set
145 */
146 static inline void
147 megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs)
148 {
149 writel(1, &(regs)->outbound_intr_mask);
150
151 /* Dummy readl to force pci flush */
152 readl(&regs->outbound_intr_mask);
153 }
154
155 /**
156 * megasas_disable_intr_xscale -Disables interrupt
157 * @regs: MFI register set
158 */
159 static inline void
160 megasas_disable_intr_xscale(struct megasas_register_set __iomem * regs)
161 {
162 u32 mask = 0x1f;
163 writel(mask, &regs->outbound_intr_mask);
164 /* Dummy readl to force pci flush */
165 readl(&regs->outbound_intr_mask);
166 }
167
168 /**
169 * megasas_read_fw_status_reg_xscale - returns the current FW status value
170 * @regs: MFI register set
171 */
172 static u32
173 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
174 {
175 return readl(&(regs)->outbound_msg_0);
176 }
177 /**
178 * megasas_clear_interrupt_xscale - Check & clear interrupt
179 * @regs: MFI register set
180 */
181 static int
182 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
183 {
184 u32 status;
185 /*
186 * Check if it is our interrupt
187 */
188 status = readl(&regs->outbound_intr_status);
189
190 if (!(status & MFI_OB_INTR_STATUS_MASK)) {
191 return 1;
192 }
193
194 /*
195 * Clear the interrupt by writing back the same value
196 */
197 writel(status, &regs->outbound_intr_status);
198
199 return 0;
200 }
201
202 /**
203 * megasas_fire_cmd_xscale - Sends command to the FW
204 * @frame_phys_addr : Physical address of cmd
205 * @frame_count : Number of frames for the command
206 * @regs : MFI register set
207 */
208 static inline void
209 megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs)
210 {
211 writel((frame_phys_addr >> 3)|(frame_count),
212 &(regs)->inbound_queue_port);
213 }
214
215 static struct megasas_instance_template megasas_instance_template_xscale = {
216
217 .fire_cmd = megasas_fire_cmd_xscale,
218 .enable_intr = megasas_enable_intr_xscale,
219 .disable_intr = megasas_disable_intr_xscale,
220 .clear_intr = megasas_clear_intr_xscale,
221 .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
222 };
223
224 /**
225 * This is the end of set of functions & definitions specific
226 * to xscale (deviceid : 1064R, PERC5) controllers
227 */
228
229 /**
230 * The following functions are defined for ppc (deviceid : 0x60)
231 * controllers
232 */
233
234 /**
235 * megasas_enable_intr_ppc - Enables interrupts
236 * @regs: MFI register set
237 */
238 static inline void
239 megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs)
240 {
241 writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
242
243 writel(~0x80000004, &(regs)->outbound_intr_mask);
244
245 /* Dummy readl to force pci flush */
246 readl(&regs->outbound_intr_mask);
247 }
248
249 /**
250 * megasas_disable_intr_ppc - Disable interrupt
251 * @regs: MFI register set
252 */
253 static inline void
254 megasas_disable_intr_ppc(struct megasas_register_set __iomem * regs)
255 {
256 u32 mask = 0xFFFFFFFF;
257 writel(mask, &regs->outbound_intr_mask);
258 /* Dummy readl to force pci flush */
259 readl(&regs->outbound_intr_mask);
260 }
261
262 /**
263 * megasas_read_fw_status_reg_ppc - returns the current FW status value
264 * @regs: MFI register set
265 */
266 static u32
267 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
268 {
269 return readl(&(regs)->outbound_scratch_pad);
270 }
271
272 /**
273 * megasas_clear_interrupt_ppc - Check & clear interrupt
274 * @regs: MFI register set
275 */
276 static int
277 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
278 {
279 u32 status;
280 /*
281 * Check if it is our interrupt
282 */
283 status = readl(&regs->outbound_intr_status);
284
285 if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) {
286 return 1;
287 }
288
289 /*
290 * Clear the interrupt by writing back the same value
291 */
292 writel(status, &regs->outbound_doorbell_clear);
293
294 return 0;
295 }
296 /**
297 * megasas_fire_cmd_ppc - Sends command to the FW
298 * @frame_phys_addr : Physical address of cmd
299 * @frame_count : Number of frames for the command
300 * @regs : MFI register set
301 */
302 static inline void
303 megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs)
304 {
305 writel((frame_phys_addr | (frame_count<<1))|1,
306 &(regs)->inbound_queue_port);
307 }
308
309 static struct megasas_instance_template megasas_instance_template_ppc = {
310
311 .fire_cmd = megasas_fire_cmd_ppc,
312 .enable_intr = megasas_enable_intr_ppc,
313 .disable_intr = megasas_disable_intr_ppc,
314 .clear_intr = megasas_clear_intr_ppc,
315 .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
316 };
317
318 /**
319 * This is the end of set of functions & definitions
320 * specific to ppc (deviceid : 0x60) controllers
321 */
322
323 /**
324 * megasas_issue_polled - Issues a polling command
325 * @instance: Adapter soft state
326 * @cmd: Command packet to be issued
327 *
328 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
329 */
330 static int
331 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
332 {
333 int i;
334 u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
335
336 struct megasas_header *frame_hdr = &cmd->frame->hdr;
337
338 frame_hdr->cmd_status = 0xFF;
339 frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
340
341 /*
342 * Issue the frame using inbound queue port
343 */
344 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
345
346 /*
347 * Wait for cmd_status to change
348 */
349 for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) {
350 rmb();
351 msleep(1);
352 }
353
354 if (frame_hdr->cmd_status == 0xff)
355 return -ETIME;
356
357 return 0;
358 }
359
360 /**
361 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
362 * @instance: Adapter soft state
363 * @cmd: Command to be issued
364 *
365 * This function waits on an event for the command to be returned from ISR.
366 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
367 * Used to issue ioctl commands.
368 */
369 static int
370 megasas_issue_blocked_cmd(struct megasas_instance *instance,
371 struct megasas_cmd *cmd)
372 {
373 cmd->cmd_status = ENODATA;
374
375 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
376
377 wait_event_timeout(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA),
378 MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ);
379
380 return 0;
381 }
382
383 /**
384 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
385 * @instance: Adapter soft state
386 * @cmd_to_abort: Previously issued cmd to be aborted
387 *
388 * MFI firmware can abort previously issued AEN comamnd (automatic event
389 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
390 * cmd and waits for return status.
391 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
392 */
393 static int
394 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
395 struct megasas_cmd *cmd_to_abort)
396 {
397 struct megasas_cmd *cmd;
398 struct megasas_abort_frame *abort_fr;
399
400 cmd = megasas_get_cmd(instance);
401
402 if (!cmd)
403 return -1;
404
405 abort_fr = &cmd->frame->abort;
406
407 /*
408 * Prepare and issue the abort frame
409 */
410 abort_fr->cmd = MFI_CMD_ABORT;
411 abort_fr->cmd_status = 0xFF;
412 abort_fr->flags = 0;
413 abort_fr->abort_context = cmd_to_abort->index;
414 abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
415 abort_fr->abort_mfi_phys_addr_hi = 0;
416
417 cmd->sync_cmd = 1;
418 cmd->cmd_status = 0xFF;
419
420 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
421
422 /*
423 * Wait for this cmd to complete
424 */
425 wait_event_timeout(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF),
426 MEGASAS_INTERNAL_CMD_WAIT_TIME*HZ);
427
428 megasas_return_cmd(instance, cmd);
429 return 0;
430 }
431
432 /**
433 * megasas_make_sgl32 - Prepares 32-bit SGL
434 * @instance: Adapter soft state
435 * @scp: SCSI command from the mid-layer
436 * @mfi_sgl: SGL to be filled in
437 *
438 * If successful, this function returns the number of SG elements. Otherwise,
439 * it returnes -1.
440 */
441 static int
442 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
443 union megasas_sgl *mfi_sgl)
444 {
445 int i;
446 int sge_count;
447 struct scatterlist *os_sgl;
448
449 sge_count = scsi_dma_map(scp);
450 BUG_ON(sge_count < 0);
451
452 if (sge_count) {
453 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
454 mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
455 mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
456 }
457 }
458 return sge_count;
459 }
460
461 /**
462 * megasas_make_sgl64 - Prepares 64-bit SGL
463 * @instance: Adapter soft state
464 * @scp: SCSI command from the mid-layer
465 * @mfi_sgl: SGL to be filled in
466 *
467 * If successful, this function returns the number of SG elements. Otherwise,
468 * it returnes -1.
469 */
470 static int
471 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
472 union megasas_sgl *mfi_sgl)
473 {
474 int i;
475 int sge_count;
476 struct scatterlist *os_sgl;
477
478 sge_count = scsi_dma_map(scp);
479 BUG_ON(sge_count < 0);
480
481 if (sge_count) {
482 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
483 mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
484 mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
485 }
486 }
487 return sge_count;
488 }
489
490 /**
491 * megasas_get_frame_count - Computes the number of frames
492 * @sge_count : number of sg elements
493 *
494 * Returns the number of frames required for numnber of sge's (sge_count)
495 */
496
497 static u32 megasas_get_frame_count(u8 sge_count)
498 {
499 int num_cnt;
500 int sge_bytes;
501 u32 sge_sz;
502 u32 frame_count=0;
503
504 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
505 sizeof(struct megasas_sge32);
506
507 /*
508 * Main frame can contain 2 SGEs for 64-bit SGLs and
509 * 3 SGEs for 32-bit SGLs
510 */
511 if (IS_DMA64)
512 num_cnt = sge_count - 2;
513 else
514 num_cnt = sge_count - 3;
515
516 if(num_cnt>0){
517 sge_bytes = sge_sz * num_cnt;
518
519 frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
520 ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
521 }
522 /* Main frame */
523 frame_count +=1;
524
525 if (frame_count > 7)
526 frame_count = 8;
527 return frame_count;
528 }
529
530 /**
531 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
532 * @instance: Adapter soft state
533 * @scp: SCSI command
534 * @cmd: Command to be prepared in
535 *
536 * This function prepares CDB commands. These are typcially pass-through
537 * commands to the devices.
538 */
539 static int
540 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
541 struct megasas_cmd *cmd)
542 {
543 u32 is_logical;
544 u32 device_id;
545 u16 flags = 0;
546 struct megasas_pthru_frame *pthru;
547
548 is_logical = MEGASAS_IS_LOGICAL(scp);
549 device_id = MEGASAS_DEV_INDEX(instance, scp);
550 pthru = (struct megasas_pthru_frame *)cmd->frame;
551
552 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
553 flags = MFI_FRAME_DIR_WRITE;
554 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
555 flags = MFI_FRAME_DIR_READ;
556 else if (scp->sc_data_direction == PCI_DMA_NONE)
557 flags = MFI_FRAME_DIR_NONE;
558
559 /*
560 * Prepare the DCDB frame
561 */
562 pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
563 pthru->cmd_status = 0x0;
564 pthru->scsi_status = 0x0;
565 pthru->target_id = device_id;
566 pthru->lun = scp->device->lun;
567 pthru->cdb_len = scp->cmd_len;
568 pthru->timeout = 0;
569 pthru->flags = flags;
570 pthru->data_xfer_len = scsi_bufflen(scp);
571
572 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
573
574 /*
575 * Construct SGL
576 */
577 if (IS_DMA64) {
578 pthru->flags |= MFI_FRAME_SGL64;
579 pthru->sge_count = megasas_make_sgl64(instance, scp,
580 &pthru->sgl);
581 } else
582 pthru->sge_count = megasas_make_sgl32(instance, scp,
583 &pthru->sgl);
584
585 /*
586 * Sense info specific
587 */
588 pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
589 pthru->sense_buf_phys_addr_hi = 0;
590 pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
591
592 /*
593 * Compute the total number of frames this command consumes. FW uses
594 * this number to pull sufficient number of frames from host memory.
595 */
596 cmd->frame_count = megasas_get_frame_count(pthru->sge_count);
597
598 return cmd->frame_count;
599 }
600
601 /**
602 * megasas_build_ldio - Prepares IOs to logical devices
603 * @instance: Adapter soft state
604 * @scp: SCSI command
605 * @cmd: Command to to be prepared
606 *
607 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
608 */
609 static int
610 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
611 struct megasas_cmd *cmd)
612 {
613 u32 device_id;
614 u8 sc = scp->cmnd[0];
615 u16 flags = 0;
616 struct megasas_io_frame *ldio;
617
618 device_id = MEGASAS_DEV_INDEX(instance, scp);
619 ldio = (struct megasas_io_frame *)cmd->frame;
620
621 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
622 flags = MFI_FRAME_DIR_WRITE;
623 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
624 flags = MFI_FRAME_DIR_READ;
625
626 /*
627 * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
628 */
629 ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
630 ldio->cmd_status = 0x0;
631 ldio->scsi_status = 0x0;
632 ldio->target_id = device_id;
633 ldio->timeout = 0;
634 ldio->reserved_0 = 0;
635 ldio->pad_0 = 0;
636 ldio->flags = flags;
637 ldio->start_lba_hi = 0;
638 ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
639
640 /*
641 * 6-byte READ(0x08) or WRITE(0x0A) cdb
642 */
643 if (scp->cmd_len == 6) {
644 ldio->lba_count = (u32) scp->cmnd[4];
645 ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
646 ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
647
648 ldio->start_lba_lo &= 0x1FFFFF;
649 }
650
651 /*
652 * 10-byte READ(0x28) or WRITE(0x2A) cdb
653 */
654 else if (scp->cmd_len == 10) {
655 ldio->lba_count = (u32) scp->cmnd[8] |
656 ((u32) scp->cmnd[7] << 8);
657 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
658 ((u32) scp->cmnd[3] << 16) |
659 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
660 }
661
662 /*
663 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
664 */
665 else if (scp->cmd_len == 12) {
666 ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
667 ((u32) scp->cmnd[7] << 16) |
668 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
669
670 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
671 ((u32) scp->cmnd[3] << 16) |
672 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
673 }
674
675 /*
676 * 16-byte READ(0x88) or WRITE(0x8A) cdb
677 */
678 else if (scp->cmd_len == 16) {
679 ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
680 ((u32) scp->cmnd[11] << 16) |
681 ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
682
683 ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
684 ((u32) scp->cmnd[7] << 16) |
685 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
686
687 ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
688 ((u32) scp->cmnd[3] << 16) |
689 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
690
691 }
692
693 /*
694 * Construct SGL
695 */
696 if (IS_DMA64) {
697 ldio->flags |= MFI_FRAME_SGL64;
698 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
699 } else
700 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
701
702 /*
703 * Sense info specific
704 */
705 ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
706 ldio->sense_buf_phys_addr_hi = 0;
707 ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
708
709 /*
710 * Compute the total number of frames this command consumes. FW uses
711 * this number to pull sufficient number of frames from host memory.
712 */
713 cmd->frame_count = megasas_get_frame_count(ldio->sge_count);
714
715 return cmd->frame_count;
716 }
717
718 /**
719 * megasas_is_ldio - Checks if the cmd is for logical drive
720 * @scmd: SCSI command
721 *
722 * Called by megasas_queue_command to find out if the command to be queued
723 * is a logical drive command
724 */
725 static inline int megasas_is_ldio(struct scsi_cmnd *cmd)
726 {
727 if (!MEGASAS_IS_LOGICAL(cmd))
728 return 0;
729 switch (cmd->cmnd[0]) {
730 case READ_10:
731 case WRITE_10:
732 case READ_12:
733 case WRITE_12:
734 case READ_6:
735 case WRITE_6:
736 case READ_16:
737 case WRITE_16:
738 return 1;
739 default:
740 return 0;
741 }
742 }
743
744 /**
745 * megasas_dump_pending_frames - Dumps the frame address of all pending cmds
746 * in FW
747 * @instance: Adapter soft state
748 */
749 static inline void
750 megasas_dump_pending_frames(struct megasas_instance *instance)
751 {
752 struct megasas_cmd *cmd;
753 int i,n;
754 union megasas_sgl *mfi_sgl;
755 struct megasas_io_frame *ldio;
756 struct megasas_pthru_frame *pthru;
757 u32 sgcount;
758 u32 max_cmd = instance->max_fw_cmds;
759
760 printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
761 printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
762 if (IS_DMA64)
763 printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
764 else
765 printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
766
767 printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
768 for (i = 0; i < max_cmd; i++) {
769 cmd = instance->cmd_list[i];
770 if(!cmd->scmd)
771 continue;
772 printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
773 if (megasas_is_ldio(cmd->scmd)){
774 ldio = (struct megasas_io_frame *)cmd->frame;
775 mfi_sgl = &ldio->sgl;
776 sgcount = ldio->sge_count;
777 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);
778 }
779 else {
780 pthru = (struct megasas_pthru_frame *) cmd->frame;
781 mfi_sgl = &pthru->sgl;
782 sgcount = pthru->sge_count;
783 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);
784 }
785 if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
786 for (n = 0; n < sgcount; n++){
787 if (IS_DMA64)
788 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) ;
789 else
790 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl->sge32[n].length , mfi_sgl->sge32[n].phys_addr) ;
791 }
792 }
793 printk(KERN_ERR "\n");
794 } /*for max_cmd*/
795 printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
796 for (i = 0; i < max_cmd; i++) {
797
798 cmd = instance->cmd_list[i];
799
800 if(cmd->sync_cmd == 1){
801 printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
802 }
803 }
804 printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
805 }
806
807 /**
808 * megasas_queue_command - Queue entry point
809 * @scmd: SCSI command to be queued
810 * @done: Callback entry point
811 */
812 static int
813 megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
814 {
815 u32 frame_count;
816 struct megasas_cmd *cmd;
817 struct megasas_instance *instance;
818
819 instance = (struct megasas_instance *)
820 scmd->device->host->hostdata;
821
822 /* Don't process if we have already declared adapter dead */
823 if (instance->hw_crit_error)
824 return SCSI_MLQUEUE_HOST_BUSY;
825
826 scmd->scsi_done = done;
827 scmd->result = 0;
828
829 if (MEGASAS_IS_LOGICAL(scmd) &&
830 (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
831 scmd->result = DID_BAD_TARGET << 16;
832 goto out_done;
833 }
834
835 switch (scmd->cmnd[0]) {
836 case SYNCHRONIZE_CACHE:
837 /*
838 * FW takes care of flush cache on its own
839 * No need to send it down
840 */
841 scmd->result = DID_OK << 16;
842 goto out_done;
843 default:
844 break;
845 }
846
847 cmd = megasas_get_cmd(instance);
848 if (!cmd)
849 return SCSI_MLQUEUE_HOST_BUSY;
850
851 /*
852 * Logical drive command
853 */
854 if (megasas_is_ldio(scmd))
855 frame_count = megasas_build_ldio(instance, scmd, cmd);
856 else
857 frame_count = megasas_build_dcdb(instance, scmd, cmd);
858
859 if (!frame_count)
860 goto out_return_cmd;
861
862 cmd->scmd = scmd;
863 scmd->SCp.ptr = (char *)cmd;
864
865 /*
866 * Issue the command to the FW
867 */
868 atomic_inc(&instance->fw_outstanding);
869
870 instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set);
871 /*
872 * Check if we have pend cmds to be completed
873 */
874 if (poll_mode_io && atomic_read(&instance->fw_outstanding))
875 tasklet_schedule(&instance->isr_tasklet);
876
877
878 return 0;
879
880 out_return_cmd:
881 megasas_return_cmd(instance, cmd);
882 out_done:
883 done(scmd);
884 return 0;
885 }
886
887 static int megasas_slave_configure(struct scsi_device *sdev)
888 {
889 /*
890 * Don't export physical disk devices to the disk driver.
891 *
892 * FIXME: Currently we don't export them to the midlayer at all.
893 * That will be fixed once LSI engineers have audited the
894 * firmware for possible issues.
895 */
896 if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK)
897 return -ENXIO;
898
899 /*
900 * The RAID firmware may require extended timeouts.
901 */
902 if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
903 sdev->timeout = MEGASAS_DEFAULT_CMD_TIMEOUT * HZ;
904 return 0;
905 }
906
907 /**
908 * megasas_complete_cmd_dpc - Returns FW's controller structure
909 * @instance_addr: Address of adapter soft state
910 *
911 * Tasklet to complete cmds
912 */
913 static void megasas_complete_cmd_dpc(unsigned long instance_addr)
914 {
915 u32 producer;
916 u32 consumer;
917 u32 context;
918 struct megasas_cmd *cmd;
919 struct megasas_instance *instance =
920 (struct megasas_instance *)instance_addr;
921 unsigned long flags;
922
923 /* If we have already declared adapter dead, donot complete cmds */
924 if (instance->hw_crit_error)
925 return;
926
927 spin_lock_irqsave(&instance->completion_lock, flags);
928
929 producer = *instance->producer;
930 consumer = *instance->consumer;
931
932 while (consumer != producer) {
933 context = instance->reply_queue[consumer];
934
935 cmd = instance->cmd_list[context];
936
937 megasas_complete_cmd(instance, cmd, DID_OK);
938
939 consumer++;
940 if (consumer == (instance->max_fw_cmds + 1)) {
941 consumer = 0;
942 }
943 }
944
945 *instance->consumer = producer;
946
947 spin_unlock_irqrestore(&instance->completion_lock, flags);
948
949 /*
950 * Check if we can restore can_queue
951 */
952 if (instance->flag & MEGASAS_FW_BUSY
953 && time_after(jiffies, instance->last_time + 5 * HZ)
954 && atomic_read(&instance->fw_outstanding) < 17) {
955
956 spin_lock_irqsave(instance->host->host_lock, flags);
957 instance->flag &= ~MEGASAS_FW_BUSY;
958 instance->host->can_queue =
959 instance->max_fw_cmds - MEGASAS_INT_CMDS;
960
961 spin_unlock_irqrestore(instance->host->host_lock, flags);
962 }
963 }
964
965 /**
966 * megasas_wait_for_outstanding - Wait for all outstanding cmds
967 * @instance: Adapter soft state
968 *
969 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
970 * complete all its outstanding commands. Returns error if one or more IOs
971 * are pending after this time period. It also marks the controller dead.
972 */
973 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
974 {
975 int i;
976 u32 wait_time = MEGASAS_RESET_WAIT_TIME;
977
978 for (i = 0; i < wait_time; i++) {
979
980 int outstanding = atomic_read(&instance->fw_outstanding);
981
982 if (!outstanding)
983 break;
984
985 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
986 printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
987 "commands to complete\n",i,outstanding);
988 /*
989 * Call cmd completion routine. Cmd to be
990 * be completed directly without depending on isr.
991 */
992 megasas_complete_cmd_dpc((unsigned long)instance);
993 }
994
995 msleep(1000);
996 }
997
998 if (atomic_read(&instance->fw_outstanding)) {
999 /*
1000 * Send signal to FW to stop processing any pending cmds.
1001 * The controller will be taken offline by the OS now.
1002 */
1003 writel(MFI_STOP_ADP,
1004 &instance->reg_set->inbound_doorbell);
1005 megasas_dump_pending_frames(instance);
1006 instance->hw_crit_error = 1;
1007 return FAILED;
1008 }
1009
1010 return SUCCESS;
1011 }
1012
1013 /**
1014 * megasas_generic_reset - Generic reset routine
1015 * @scmd: Mid-layer SCSI command
1016 *
1017 * This routine implements a generic reset handler for device, bus and host
1018 * reset requests. Device, bus and host specific reset handlers can use this
1019 * function after they do their specific tasks.
1020 */
1021 static int megasas_generic_reset(struct scsi_cmnd *scmd)
1022 {
1023 int ret_val;
1024 struct megasas_instance *instance;
1025
1026 instance = (struct megasas_instance *)scmd->device->host->hostdata;
1027
1028 scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x retries=%x\n",
1029 scmd->serial_number, scmd->cmnd[0], scmd->retries);
1030
1031 if (instance->hw_crit_error) {
1032 printk(KERN_ERR "megasas: cannot recover from previous reset "
1033 "failures\n");
1034 return FAILED;
1035 }
1036
1037 ret_val = megasas_wait_for_outstanding(instance);
1038 if (ret_val == SUCCESS)
1039 printk(KERN_NOTICE "megasas: reset successful \n");
1040 else
1041 printk(KERN_ERR "megasas: failed to do reset\n");
1042
1043 return ret_val;
1044 }
1045
1046 /**
1047 * megasas_reset_timer - quiesce the adapter if required
1048 * @scmd: scsi cmnd
1049 *
1050 * Sets the FW busy flag and reduces the host->can_queue if the
1051 * cmd has not been completed within the timeout period.
1052 */
1053 static enum
1054 scsi_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
1055 {
1056 struct megasas_cmd *cmd = (struct megasas_cmd *)scmd->SCp.ptr;
1057 struct megasas_instance *instance;
1058 unsigned long flags;
1059
1060 if (time_after(jiffies, scmd->jiffies_at_alloc +
1061 (MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
1062 return EH_NOT_HANDLED;
1063 }
1064
1065 instance = cmd->instance;
1066 if (!(instance->flag & MEGASAS_FW_BUSY)) {
1067 /* FW is busy, throttle IO */
1068 spin_lock_irqsave(instance->host->host_lock, flags);
1069
1070 instance->host->can_queue = 16;
1071 instance->last_time = jiffies;
1072 instance->flag |= MEGASAS_FW_BUSY;
1073
1074 spin_unlock_irqrestore(instance->host->host_lock, flags);
1075 }
1076 return EH_RESET_TIMER;
1077 }
1078
1079 /**
1080 * megasas_reset_device - Device reset handler entry point
1081 */
1082 static int megasas_reset_device(struct scsi_cmnd *scmd)
1083 {
1084 int ret;
1085
1086 /*
1087 * First wait for all commands to complete
1088 */
1089 ret = megasas_generic_reset(scmd);
1090
1091 return ret;
1092 }
1093
1094 /**
1095 * megasas_reset_bus_host - Bus & host reset handler entry point
1096 */
1097 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
1098 {
1099 int ret;
1100
1101 /*
1102 * First wait for all commands to complete
1103 */
1104 ret = megasas_generic_reset(scmd);
1105
1106 return ret;
1107 }
1108
1109 /**
1110 * megasas_bios_param - Returns disk geometry for a disk
1111 * @sdev: device handle
1112 * @bdev: block device
1113 * @capacity: drive capacity
1114 * @geom: geometry parameters
1115 */
1116 static int
1117 megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
1118 sector_t capacity, int geom[])
1119 {
1120 int heads;
1121 int sectors;
1122 sector_t cylinders;
1123 unsigned long tmp;
1124 /* Default heads (64) & sectors (32) */
1125 heads = 64;
1126 sectors = 32;
1127
1128 tmp = heads * sectors;
1129 cylinders = capacity;
1130
1131 sector_div(cylinders, tmp);
1132
1133 /*
1134 * Handle extended translation size for logical drives > 1Gb
1135 */
1136
1137 if (capacity >= 0x200000) {
1138 heads = 255;
1139 sectors = 63;
1140 tmp = heads*sectors;
1141 cylinders = capacity;
1142 sector_div(cylinders, tmp);
1143 }
1144
1145 geom[0] = heads;
1146 geom[1] = sectors;
1147 geom[2] = cylinders;
1148
1149 return 0;
1150 }
1151
1152 /**
1153 * megasas_service_aen - Processes an event notification
1154 * @instance: Adapter soft state
1155 * @cmd: AEN command completed by the ISR
1156 *
1157 * For AEN, driver sends a command down to FW that is held by the FW till an
1158 * event occurs. When an event of interest occurs, FW completes the command
1159 * that it was previously holding.
1160 *
1161 * This routines sends SIGIO signal to processes that have registered with the
1162 * driver for AEN.
1163 */
1164 static void
1165 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
1166 {
1167 /*
1168 * Don't signal app if it is just an aborted previously registered aen
1169 */
1170 if (!cmd->abort_aen)
1171 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
1172 else
1173 cmd->abort_aen = 0;
1174
1175 instance->aen_cmd = NULL;
1176 megasas_return_cmd(instance, cmd);
1177 }
1178
1179 /*
1180 * Scsi host template for megaraid_sas driver
1181 */
1182 static struct scsi_host_template megasas_template = {
1183
1184 .module = THIS_MODULE,
1185 .name = "LSI SAS based MegaRAID driver",
1186 .proc_name = "megaraid_sas",
1187 .slave_configure = megasas_slave_configure,
1188 .queuecommand = megasas_queue_command,
1189 .eh_device_reset_handler = megasas_reset_device,
1190 .eh_bus_reset_handler = megasas_reset_bus_host,
1191 .eh_host_reset_handler = megasas_reset_bus_host,
1192 .eh_timed_out = megasas_reset_timer,
1193 .bios_param = megasas_bios_param,
1194 .use_clustering = ENABLE_CLUSTERING,
1195 };
1196
1197 /**
1198 * megasas_complete_int_cmd - Completes an internal command
1199 * @instance: Adapter soft state
1200 * @cmd: Command to be completed
1201 *
1202 * The megasas_issue_blocked_cmd() function waits for a command to complete
1203 * after it issues a command. This function wakes up that waiting routine by
1204 * calling wake_up() on the wait queue.
1205 */
1206 static void
1207 megasas_complete_int_cmd(struct megasas_instance *instance,
1208 struct megasas_cmd *cmd)
1209 {
1210 cmd->cmd_status = cmd->frame->io.cmd_status;
1211
1212 if (cmd->cmd_status == ENODATA) {
1213 cmd->cmd_status = 0;
1214 }
1215 wake_up(&instance->int_cmd_wait_q);
1216 }
1217
1218 /**
1219 * megasas_complete_abort - Completes aborting a command
1220 * @instance: Adapter soft state
1221 * @cmd: Cmd that was issued to abort another cmd
1222 *
1223 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
1224 * after it issues an abort on a previously issued command. This function
1225 * wakes up all functions waiting on the same wait queue.
1226 */
1227 static void
1228 megasas_complete_abort(struct megasas_instance *instance,
1229 struct megasas_cmd *cmd)
1230 {
1231 if (cmd->sync_cmd) {
1232 cmd->sync_cmd = 0;
1233 cmd->cmd_status = 0;
1234 wake_up(&instance->abort_cmd_wait_q);
1235 }
1236
1237 return;
1238 }
1239
1240 /**
1241 * megasas_complete_cmd - Completes a command
1242 * @instance: Adapter soft state
1243 * @cmd: Command to be completed
1244 * @alt_status: If non-zero, use this value as status to
1245 * SCSI mid-layer instead of the value returned
1246 * by the FW. This should be used if caller wants
1247 * an alternate status (as in the case of aborted
1248 * commands)
1249 */
1250 static void
1251 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
1252 u8 alt_status)
1253 {
1254 int exception = 0;
1255 struct megasas_header *hdr = &cmd->frame->hdr;
1256
1257 if (cmd->scmd)
1258 cmd->scmd->SCp.ptr = NULL;
1259
1260 switch (hdr->cmd) {
1261
1262 case MFI_CMD_PD_SCSI_IO:
1263 case MFI_CMD_LD_SCSI_IO:
1264
1265 /*
1266 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
1267 * issued either through an IO path or an IOCTL path. If it
1268 * was via IOCTL, we will send it to internal completion.
1269 */
1270 if (cmd->sync_cmd) {
1271 cmd->sync_cmd = 0;
1272 megasas_complete_int_cmd(instance, cmd);
1273 break;
1274 }
1275
1276 case MFI_CMD_LD_READ:
1277 case MFI_CMD_LD_WRITE:
1278
1279 if (alt_status) {
1280 cmd->scmd->result = alt_status << 16;
1281 exception = 1;
1282 }
1283
1284 if (exception) {
1285
1286 atomic_dec(&instance->fw_outstanding);
1287
1288 scsi_dma_unmap(cmd->scmd);
1289 cmd->scmd->scsi_done(cmd->scmd);
1290 megasas_return_cmd(instance, cmd);
1291
1292 break;
1293 }
1294
1295 switch (hdr->cmd_status) {
1296
1297 case MFI_STAT_OK:
1298 cmd->scmd->result = DID_OK << 16;
1299 break;
1300
1301 case MFI_STAT_SCSI_IO_FAILED:
1302 case MFI_STAT_LD_INIT_IN_PROGRESS:
1303 cmd->scmd->result =
1304 (DID_ERROR << 16) | hdr->scsi_status;
1305 break;
1306
1307 case MFI_STAT_SCSI_DONE_WITH_ERROR:
1308
1309 cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
1310
1311 if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
1312 memset(cmd->scmd->sense_buffer, 0,
1313 SCSI_SENSE_BUFFERSIZE);
1314 memcpy(cmd->scmd->sense_buffer, cmd->sense,
1315 hdr->sense_len);
1316
1317 cmd->scmd->result |= DRIVER_SENSE << 24;
1318 }
1319
1320 break;
1321
1322 case MFI_STAT_LD_OFFLINE:
1323 case MFI_STAT_DEVICE_NOT_FOUND:
1324 cmd->scmd->result = DID_BAD_TARGET << 16;
1325 break;
1326
1327 default:
1328 printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
1329 hdr->cmd_status);
1330 cmd->scmd->result = DID_ERROR << 16;
1331 break;
1332 }
1333
1334 atomic_dec(&instance->fw_outstanding);
1335
1336 scsi_dma_unmap(cmd->scmd);
1337 cmd->scmd->scsi_done(cmd->scmd);
1338 megasas_return_cmd(instance, cmd);
1339
1340 break;
1341
1342 case MFI_CMD_SMP:
1343 case MFI_CMD_STP:
1344 case MFI_CMD_DCMD:
1345
1346 /*
1347 * See if got an event notification
1348 */
1349 if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
1350 megasas_service_aen(instance, cmd);
1351 else
1352 megasas_complete_int_cmd(instance, cmd);
1353
1354 break;
1355
1356 case MFI_CMD_ABORT:
1357 /*
1358 * Cmd issued to abort another cmd returned
1359 */
1360 megasas_complete_abort(instance, cmd);
1361 break;
1362
1363 default:
1364 printk("megasas: Unknown command completed! [0x%X]\n",
1365 hdr->cmd);
1366 break;
1367 }
1368 }
1369
1370 /**
1371 * megasas_deplete_reply_queue - Processes all completed commands
1372 * @instance: Adapter soft state
1373 * @alt_status: Alternate status to be returned to
1374 * SCSI mid-layer instead of the status
1375 * returned by the FW
1376 */
1377 static int
1378 megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status)
1379 {
1380 /*
1381 * Check if it is our interrupt
1382 * Clear the interrupt
1383 */
1384 if(instance->instancet->clear_intr(instance->reg_set))
1385 return IRQ_NONE;
1386
1387 if (instance->hw_crit_error)
1388 goto out_done;
1389 /*
1390 * Schedule the tasklet for cmd completion
1391 */
1392 tasklet_schedule(&instance->isr_tasklet);
1393 out_done:
1394 return IRQ_HANDLED;
1395 }
1396
1397 /**
1398 * megasas_isr - isr entry point
1399 */
1400 static irqreturn_t megasas_isr(int irq, void *devp)
1401 {
1402 return megasas_deplete_reply_queue((struct megasas_instance *)devp,
1403 DID_OK);
1404 }
1405
1406 /**
1407 * megasas_transition_to_ready - Move the FW to READY state
1408 * @instance: Adapter soft state
1409 *
1410 * During the initialization, FW passes can potentially be in any one of
1411 * several possible states. If the FW in operational, waiting-for-handshake
1412 * states, driver must take steps to bring it to ready state. Otherwise, it
1413 * has to wait for the ready state.
1414 */
1415 static int
1416 megasas_transition_to_ready(struct megasas_instance* instance)
1417 {
1418 int i;
1419 u8 max_wait;
1420 u32 fw_state;
1421 u32 cur_state;
1422
1423 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
1424
1425 if (fw_state != MFI_STATE_READY)
1426 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
1427 " state\n");
1428
1429 while (fw_state != MFI_STATE_READY) {
1430
1431 switch (fw_state) {
1432
1433 case MFI_STATE_FAULT:
1434
1435 printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
1436 return -ENODEV;
1437
1438 case MFI_STATE_WAIT_HANDSHAKE:
1439 /*
1440 * Set the CLR bit in inbound doorbell
1441 */
1442 writel(MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
1443 &instance->reg_set->inbound_doorbell);
1444
1445 max_wait = 2;
1446 cur_state = MFI_STATE_WAIT_HANDSHAKE;
1447 break;
1448
1449 case MFI_STATE_BOOT_MESSAGE_PENDING:
1450 writel(MFI_INIT_HOTPLUG,
1451 &instance->reg_set->inbound_doorbell);
1452
1453 max_wait = 10;
1454 cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
1455 break;
1456
1457 case MFI_STATE_OPERATIONAL:
1458 /*
1459 * Bring it to READY state; assuming max wait 10 secs
1460 */
1461 instance->instancet->disable_intr(instance->reg_set);
1462 writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell);
1463
1464 max_wait = 10;
1465 cur_state = MFI_STATE_OPERATIONAL;
1466 break;
1467
1468 case MFI_STATE_UNDEFINED:
1469 /*
1470 * This state should not last for more than 2 seconds
1471 */
1472 max_wait = 2;
1473 cur_state = MFI_STATE_UNDEFINED;
1474 break;
1475
1476 case MFI_STATE_BB_INIT:
1477 max_wait = 2;
1478 cur_state = MFI_STATE_BB_INIT;
1479 break;
1480
1481 case MFI_STATE_FW_INIT:
1482 max_wait = 20;
1483 cur_state = MFI_STATE_FW_INIT;
1484 break;
1485
1486 case MFI_STATE_FW_INIT_2:
1487 max_wait = 20;
1488 cur_state = MFI_STATE_FW_INIT_2;
1489 break;
1490
1491 case MFI_STATE_DEVICE_SCAN:
1492 max_wait = 20;
1493 cur_state = MFI_STATE_DEVICE_SCAN;
1494 break;
1495
1496 case MFI_STATE_FLUSH_CACHE:
1497 max_wait = 20;
1498 cur_state = MFI_STATE_FLUSH_CACHE;
1499 break;
1500
1501 default:
1502 printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
1503 fw_state);
1504 return -ENODEV;
1505 }
1506
1507 /*
1508 * The cur_state should not last for more than max_wait secs
1509 */
1510 for (i = 0; i < (max_wait * 1000); i++) {
1511 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
1512 MFI_STATE_MASK ;
1513
1514 if (fw_state == cur_state) {
1515 msleep(1);
1516 } else
1517 break;
1518 }
1519
1520 /*
1521 * Return error if fw_state hasn't changed after max_wait
1522 */
1523 if (fw_state == cur_state) {
1524 printk(KERN_DEBUG "FW state [%d] hasn't changed "
1525 "in %d secs\n", fw_state, max_wait);
1526 return -ENODEV;
1527 }
1528 };
1529 printk(KERN_INFO "megasas: FW now in Ready state\n");
1530
1531 return 0;
1532 }
1533
1534 /**
1535 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
1536 * @instance: Adapter soft state
1537 */
1538 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
1539 {
1540 int i;
1541 u32 max_cmd = instance->max_fw_cmds;
1542 struct megasas_cmd *cmd;
1543
1544 if (!instance->frame_dma_pool)
1545 return;
1546
1547 /*
1548 * Return all frames to pool
1549 */
1550 for (i = 0; i < max_cmd; i++) {
1551
1552 cmd = instance->cmd_list[i];
1553
1554 if (cmd->frame)
1555 pci_pool_free(instance->frame_dma_pool, cmd->frame,
1556 cmd->frame_phys_addr);
1557
1558 if (cmd->sense)
1559 pci_pool_free(instance->sense_dma_pool, cmd->sense,
1560 cmd->sense_phys_addr);
1561 }
1562
1563 /*
1564 * Now destroy the pool itself
1565 */
1566 pci_pool_destroy(instance->frame_dma_pool);
1567 pci_pool_destroy(instance->sense_dma_pool);
1568
1569 instance->frame_dma_pool = NULL;
1570 instance->sense_dma_pool = NULL;
1571 }
1572
1573 /**
1574 * megasas_create_frame_pool - Creates DMA pool for cmd frames
1575 * @instance: Adapter soft state
1576 *
1577 * Each command packet has an embedded DMA memory buffer that is used for
1578 * filling MFI frame and the SG list that immediately follows the frame. This
1579 * function creates those DMA memory buffers for each command packet by using
1580 * PCI pool facility.
1581 */
1582 static int megasas_create_frame_pool(struct megasas_instance *instance)
1583 {
1584 int i;
1585 u32 max_cmd;
1586 u32 sge_sz;
1587 u32 sgl_sz;
1588 u32 total_sz;
1589 u32 frame_count;
1590 struct megasas_cmd *cmd;
1591
1592 max_cmd = instance->max_fw_cmds;
1593
1594 /*
1595 * Size of our frame is 64 bytes for MFI frame, followed by max SG
1596 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
1597 */
1598 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1599 sizeof(struct megasas_sge32);
1600
1601 /*
1602 * Calculated the number of 64byte frames required for SGL
1603 */
1604 sgl_sz = sge_sz * instance->max_num_sge;
1605 frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
1606
1607 /*
1608 * We need one extra frame for the MFI command
1609 */
1610 frame_count++;
1611
1612 total_sz = MEGAMFI_FRAME_SIZE * frame_count;
1613 /*
1614 * Use DMA pool facility provided by PCI layer
1615 */
1616 instance->frame_dma_pool = pci_pool_create("megasas frame pool",
1617 instance->pdev, total_sz, 64,
1618 0);
1619
1620 if (!instance->frame_dma_pool) {
1621 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
1622 return -ENOMEM;
1623 }
1624
1625 instance->sense_dma_pool = pci_pool_create("megasas sense pool",
1626 instance->pdev, 128, 4, 0);
1627
1628 if (!instance->sense_dma_pool) {
1629 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
1630
1631 pci_pool_destroy(instance->frame_dma_pool);
1632 instance->frame_dma_pool = NULL;
1633
1634 return -ENOMEM;
1635 }
1636
1637 /*
1638 * Allocate and attach a frame to each of the commands in cmd_list.
1639 * By making cmd->index as the context instead of the &cmd, we can
1640 * always use 32bit context regardless of the architecture
1641 */
1642 for (i = 0; i < max_cmd; i++) {
1643
1644 cmd = instance->cmd_list[i];
1645
1646 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
1647 GFP_KERNEL, &cmd->frame_phys_addr);
1648
1649 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
1650 GFP_KERNEL, &cmd->sense_phys_addr);
1651
1652 /*
1653 * megasas_teardown_frame_pool() takes care of freeing
1654 * whatever has been allocated
1655 */
1656 if (!cmd->frame || !cmd->sense) {
1657 printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
1658 megasas_teardown_frame_pool(instance);
1659 return -ENOMEM;
1660 }
1661
1662 cmd->frame->io.context = cmd->index;
1663 }
1664
1665 return 0;
1666 }
1667
1668 /**
1669 * megasas_free_cmds - Free all the cmds in the free cmd pool
1670 * @instance: Adapter soft state
1671 */
1672 static void megasas_free_cmds(struct megasas_instance *instance)
1673 {
1674 int i;
1675 /* First free the MFI frame pool */
1676 megasas_teardown_frame_pool(instance);
1677
1678 /* Free all the commands in the cmd_list */
1679 for (i = 0; i < instance->max_fw_cmds; i++)
1680 kfree(instance->cmd_list[i]);
1681
1682 /* Free the cmd_list buffer itself */
1683 kfree(instance->cmd_list);
1684 instance->cmd_list = NULL;
1685
1686 INIT_LIST_HEAD(&instance->cmd_pool);
1687 }
1688
1689 /**
1690 * megasas_alloc_cmds - Allocates the command packets
1691 * @instance: Adapter soft state
1692 *
1693 * Each command that is issued to the FW, whether IO commands from the OS or
1694 * internal commands like IOCTLs, are wrapped in local data structure called
1695 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
1696 * the FW.
1697 *
1698 * Each frame has a 32-bit field called context (tag). This context is used
1699 * to get back the megasas_cmd from the frame when a frame gets completed in
1700 * the ISR. Typically the address of the megasas_cmd itself would be used as
1701 * the context. But we wanted to keep the differences between 32 and 64 bit
1702 * systems to the mininum. We always use 32 bit integers for the context. In
1703 * this driver, the 32 bit values are the indices into an array cmd_list.
1704 * This array is used only to look up the megasas_cmd given the context. The
1705 * free commands themselves are maintained in a linked list called cmd_pool.
1706 */
1707 static int megasas_alloc_cmds(struct megasas_instance *instance)
1708 {
1709 int i;
1710 int j;
1711 u32 max_cmd;
1712 struct megasas_cmd *cmd;
1713
1714 max_cmd = instance->max_fw_cmds;
1715
1716 /*
1717 * instance->cmd_list is an array of struct megasas_cmd pointers.
1718 * Allocate the dynamic array first and then allocate individual
1719 * commands.
1720 */
1721 instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL);
1722
1723 if (!instance->cmd_list) {
1724 printk(KERN_DEBUG "megasas: out of memory\n");
1725 return -ENOMEM;
1726 }
1727
1728
1729 for (i = 0; i < max_cmd; i++) {
1730 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
1731 GFP_KERNEL);
1732
1733 if (!instance->cmd_list[i]) {
1734
1735 for (j = 0; j < i; j++)
1736 kfree(instance->cmd_list[j]);
1737
1738 kfree(instance->cmd_list);
1739 instance->cmd_list = NULL;
1740
1741 return -ENOMEM;
1742 }
1743 }
1744
1745 /*
1746 * Add all the commands to command pool (instance->cmd_pool)
1747 */
1748 for (i = 0; i < max_cmd; i++) {
1749 cmd = instance->cmd_list[i];
1750 memset(cmd, 0, sizeof(struct megasas_cmd));
1751 cmd->index = i;
1752 cmd->instance = instance;
1753
1754 list_add_tail(&cmd->list, &instance->cmd_pool);
1755 }
1756
1757 /*
1758 * Create a frame pool and assign one frame to each cmd
1759 */
1760 if (megasas_create_frame_pool(instance)) {
1761 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
1762 megasas_free_cmds(instance);
1763 }
1764
1765 return 0;
1766 }
1767
1768 /**
1769 * megasas_get_controller_info - Returns FW's controller structure
1770 * @instance: Adapter soft state
1771 * @ctrl_info: Controller information structure
1772 *
1773 * Issues an internal command (DCMD) to get the FW's controller structure.
1774 * This information is mainly used to find out the maximum IO transfer per
1775 * command supported by the FW.
1776 */
1777 static int
1778 megasas_get_ctrl_info(struct megasas_instance *instance,
1779 struct megasas_ctrl_info *ctrl_info)
1780 {
1781 int ret = 0;
1782 struct megasas_cmd *cmd;
1783 struct megasas_dcmd_frame *dcmd;
1784 struct megasas_ctrl_info *ci;
1785 dma_addr_t ci_h = 0;
1786
1787 cmd = megasas_get_cmd(instance);
1788
1789 if (!cmd) {
1790 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
1791 return -ENOMEM;
1792 }
1793
1794 dcmd = &cmd->frame->dcmd;
1795
1796 ci = pci_alloc_consistent(instance->pdev,
1797 sizeof(struct megasas_ctrl_info), &ci_h);
1798
1799 if (!ci) {
1800 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
1801 megasas_return_cmd(instance, cmd);
1802 return -ENOMEM;
1803 }
1804
1805 memset(ci, 0, sizeof(*ci));
1806 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1807
1808 dcmd->cmd = MFI_CMD_DCMD;
1809 dcmd->cmd_status = 0xFF;
1810 dcmd->sge_count = 1;
1811 dcmd->flags = MFI_FRAME_DIR_READ;
1812 dcmd->timeout = 0;
1813 dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
1814 dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
1815 dcmd->sgl.sge32[0].phys_addr = ci_h;
1816 dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
1817
1818 if (!megasas_issue_polled(instance, cmd)) {
1819 ret = 0;
1820 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
1821 } else {
1822 ret = -1;
1823 }
1824
1825 pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
1826 ci, ci_h);
1827
1828 megasas_return_cmd(instance, cmd);
1829 return ret;
1830 }
1831
1832 /**
1833 * megasas_issue_init_mfi - Initializes the FW
1834 * @instance: Adapter soft state
1835 *
1836 * Issues the INIT MFI cmd
1837 */
1838 static int
1839 megasas_issue_init_mfi(struct megasas_instance *instance)
1840 {
1841 u32 context;
1842
1843 struct megasas_cmd *cmd;
1844
1845 struct megasas_init_frame *init_frame;
1846 struct megasas_init_queue_info *initq_info;
1847 dma_addr_t init_frame_h;
1848 dma_addr_t initq_info_h;
1849
1850 /*
1851 * Prepare a init frame. Note the init frame points to queue info
1852 * structure. Each frame has SGL allocated after first 64 bytes. For
1853 * this frame - since we don't need any SGL - we use SGL's space as
1854 * queue info structure
1855 *
1856 * We will not get a NULL command below. We just created the pool.
1857 */
1858 cmd = megasas_get_cmd(instance);
1859
1860 init_frame = (struct megasas_init_frame *)cmd->frame;
1861 initq_info = (struct megasas_init_queue_info *)
1862 ((unsigned long)init_frame + 64);
1863
1864 init_frame_h = cmd->frame_phys_addr;
1865 initq_info_h = init_frame_h + 64;
1866
1867 context = init_frame->context;
1868 memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
1869 memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
1870 init_frame->context = context;
1871
1872 initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
1873 initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
1874
1875 initq_info->producer_index_phys_addr_lo = instance->producer_h;
1876 initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
1877
1878 init_frame->cmd = MFI_CMD_INIT;
1879 init_frame->cmd_status = 0xFF;
1880 init_frame->queue_info_new_phys_addr_lo = initq_info_h;
1881
1882 init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
1883
1884 /*
1885 * disable the intr before firing the init frame to FW
1886 */
1887 instance->instancet->disable_intr(instance->reg_set);
1888
1889 /*
1890 * Issue the init frame in polled mode
1891 */
1892
1893 if (megasas_issue_polled(instance, cmd)) {
1894 printk(KERN_ERR "megasas: Failed to init firmware\n");
1895 megasas_return_cmd(instance, cmd);
1896 goto fail_fw_init;
1897 }
1898
1899 megasas_return_cmd(instance, cmd);
1900
1901 return 0;
1902
1903 fail_fw_init:
1904 return -EINVAL;
1905 }
1906
1907 /**
1908 * megasas_start_timer - Initializes a timer object
1909 * @instance: Adapter soft state
1910 * @timer: timer object to be initialized
1911 * @fn: timer function
1912 * @interval: time interval between timer function call
1913 */
1914 static inline void
1915 megasas_start_timer(struct megasas_instance *instance,
1916 struct timer_list *timer,
1917 void *fn, unsigned long interval)
1918 {
1919 init_timer(timer);
1920 timer->expires = jiffies + interval;
1921 timer->data = (unsigned long)instance;
1922 timer->function = fn;
1923 add_timer(timer);
1924 }
1925
1926 /**
1927 * megasas_io_completion_timer - Timer fn
1928 * @instance_addr: Address of adapter soft state
1929 *
1930 * Schedules tasklet for cmd completion
1931 * if poll_mode_io is set
1932 */
1933 static void
1934 megasas_io_completion_timer(unsigned long instance_addr)
1935 {
1936 struct megasas_instance *instance =
1937 (struct megasas_instance *)instance_addr;
1938
1939 if (atomic_read(&instance->fw_outstanding))
1940 tasklet_schedule(&instance->isr_tasklet);
1941
1942 /* Restart timer */
1943 if (poll_mode_io)
1944 mod_timer(&instance->io_completion_timer,
1945 jiffies + MEGASAS_COMPLETION_TIMER_INTERVAL);
1946 }
1947
1948 /**
1949 * megasas_init_mfi - Initializes the FW
1950 * @instance: Adapter soft state
1951 *
1952 * This is the main function for initializing MFI firmware.
1953 */
1954 static int megasas_init_mfi(struct megasas_instance *instance)
1955 {
1956 u32 context_sz;
1957 u32 reply_q_sz;
1958 u32 max_sectors_1;
1959 u32 max_sectors_2;
1960 u32 tmp_sectors;
1961 struct megasas_register_set __iomem *reg_set;
1962 struct megasas_ctrl_info *ctrl_info;
1963 /*
1964 * Map the message registers
1965 */
1966 instance->base_addr = pci_resource_start(instance->pdev, 0);
1967
1968 if (pci_request_regions(instance->pdev, "megasas: LSI")) {
1969 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
1970 return -EBUSY;
1971 }
1972
1973 instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
1974
1975 if (!instance->reg_set) {
1976 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
1977 goto fail_ioremap;
1978 }
1979
1980 reg_set = instance->reg_set;
1981
1982 switch(instance->pdev->device)
1983 {
1984 case PCI_DEVICE_ID_LSI_SAS1078R:
1985 instance->instancet = &megasas_instance_template_ppc;
1986 break;
1987 case PCI_DEVICE_ID_LSI_SAS1064R:
1988 case PCI_DEVICE_ID_DELL_PERC5:
1989 default:
1990 instance->instancet = &megasas_instance_template_xscale;
1991 break;
1992 }
1993
1994 /*
1995 * We expect the FW state to be READY
1996 */
1997 if (megasas_transition_to_ready(instance))
1998 goto fail_ready_state;
1999
2000 /*
2001 * Get various operational parameters from status register
2002 */
2003 instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
2004 /*
2005 * Reduce the max supported cmds by 1. This is to ensure that the
2006 * reply_q_sz (1 more than the max cmd that driver may send)
2007 * does not exceed max cmds that the FW can support
2008 */
2009 instance->max_fw_cmds = instance->max_fw_cmds-1;
2010 instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
2011 0x10;
2012 /*
2013 * Create a pool of commands
2014 */
2015 if (megasas_alloc_cmds(instance))
2016 goto fail_alloc_cmds;
2017
2018 /*
2019 * Allocate memory for reply queue. Length of reply queue should
2020 * be _one_ more than the maximum commands handled by the firmware.
2021 *
2022 * Note: When FW completes commands, it places corresponding contex
2023 * values in this circular reply queue. This circular queue is a fairly
2024 * typical producer-consumer queue. FW is the producer (of completed
2025 * commands) and the driver is the consumer.
2026 */
2027 context_sz = sizeof(u32);
2028 reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
2029
2030 instance->reply_queue = pci_alloc_consistent(instance->pdev,
2031 reply_q_sz,
2032 &instance->reply_queue_h);
2033
2034 if (!instance->reply_queue) {
2035 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
2036 goto fail_reply_queue;
2037 }
2038
2039 if (megasas_issue_init_mfi(instance))
2040 goto fail_fw_init;
2041
2042 ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
2043
2044 /*
2045 * Compute the max allowed sectors per IO: The controller info has two
2046 * limits on max sectors. Driver should use the minimum of these two.
2047 *
2048 * 1 << stripe_sz_ops.min = max sectors per strip
2049 *
2050 * Note that older firmwares ( < FW ver 30) didn't report information
2051 * to calculate max_sectors_1. So the number ended up as zero always.
2052 */
2053 tmp_sectors = 0;
2054 if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
2055
2056 max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
2057 ctrl_info->max_strips_per_io;
2058 max_sectors_2 = ctrl_info->max_request_size;
2059
2060 tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2);
2061 }
2062
2063 instance->max_sectors_per_req = instance->max_num_sge *
2064 PAGE_SIZE / 512;
2065 if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
2066 instance->max_sectors_per_req = tmp_sectors;
2067
2068 kfree(ctrl_info);
2069
2070 /*
2071 * Setup tasklet for cmd completion
2072 */
2073
2074 tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc,
2075 (unsigned long)instance);
2076
2077 /* Initialize the cmd completion timer */
2078 if (poll_mode_io)
2079 megasas_start_timer(instance, &instance->io_completion_timer,
2080 megasas_io_completion_timer,
2081 MEGASAS_COMPLETION_TIMER_INTERVAL);
2082 return 0;
2083
2084 fail_fw_init:
2085
2086 pci_free_consistent(instance->pdev, reply_q_sz,
2087 instance->reply_queue, instance->reply_queue_h);
2088 fail_reply_queue:
2089 megasas_free_cmds(instance);
2090
2091 fail_alloc_cmds:
2092 fail_ready_state:
2093 iounmap(instance->reg_set);
2094
2095 fail_ioremap:
2096 pci_release_regions(instance->pdev);
2097
2098 return -EINVAL;
2099 }
2100
2101 /**
2102 * megasas_release_mfi - Reverses the FW initialization
2103 * @intance: Adapter soft state
2104 */
2105 static void megasas_release_mfi(struct megasas_instance *instance)
2106 {
2107 u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1);
2108
2109 pci_free_consistent(instance->pdev, reply_q_sz,
2110 instance->reply_queue, instance->reply_queue_h);
2111
2112 megasas_free_cmds(instance);
2113
2114 iounmap(instance->reg_set);
2115
2116 pci_release_regions(instance->pdev);
2117 }
2118
2119 /**
2120 * megasas_get_seq_num - Gets latest event sequence numbers
2121 * @instance: Adapter soft state
2122 * @eli: FW event log sequence numbers information
2123 *
2124 * FW maintains a log of all events in a non-volatile area. Upper layers would
2125 * usually find out the latest sequence number of the events, the seq number at
2126 * the boot etc. They would "read" all the events below the latest seq number
2127 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
2128 * number), they would subsribe to AEN (asynchronous event notification) and
2129 * wait for the events to happen.
2130 */
2131 static int
2132 megasas_get_seq_num(struct megasas_instance *instance,
2133 struct megasas_evt_log_info *eli)
2134 {
2135 struct megasas_cmd *cmd;
2136 struct megasas_dcmd_frame *dcmd;
2137 struct megasas_evt_log_info *el_info;
2138 dma_addr_t el_info_h = 0;
2139
2140 cmd = megasas_get_cmd(instance);
2141
2142 if (!cmd) {
2143 return -ENOMEM;
2144 }
2145
2146 dcmd = &cmd->frame->dcmd;
2147 el_info = pci_alloc_consistent(instance->pdev,
2148 sizeof(struct megasas_evt_log_info),
2149 &el_info_h);
2150
2151 if (!el_info) {
2152 megasas_return_cmd(instance, cmd);
2153 return -ENOMEM;
2154 }
2155
2156 memset(el_info, 0, sizeof(*el_info));
2157 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2158
2159 dcmd->cmd = MFI_CMD_DCMD;
2160 dcmd->cmd_status = 0x0;
2161 dcmd->sge_count = 1;
2162 dcmd->flags = MFI_FRAME_DIR_READ;
2163 dcmd->timeout = 0;
2164 dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
2165 dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
2166 dcmd->sgl.sge32[0].phys_addr = el_info_h;
2167 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
2168
2169 megasas_issue_blocked_cmd(instance, cmd);
2170
2171 /*
2172 * Copy the data back into callers buffer
2173 */
2174 memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
2175
2176 pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
2177 el_info, el_info_h);
2178
2179 megasas_return_cmd(instance, cmd);
2180
2181 return 0;
2182 }
2183
2184 /**
2185 * megasas_register_aen - Registers for asynchronous event notification
2186 * @instance: Adapter soft state
2187 * @seq_num: The starting sequence number
2188 * @class_locale: Class of the event
2189 *
2190 * This function subscribes for AEN for events beyond the @seq_num. It requests
2191 * to be notified if and only if the event is of type @class_locale
2192 */
2193 static int
2194 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
2195 u32 class_locale_word)
2196 {
2197 int ret_val;
2198 struct megasas_cmd *cmd;
2199 struct megasas_dcmd_frame *dcmd;
2200 union megasas_evt_class_locale curr_aen;
2201 union megasas_evt_class_locale prev_aen;
2202
2203 /*
2204 * If there an AEN pending already (aen_cmd), check if the
2205 * class_locale of that pending AEN is inclusive of the new
2206 * AEN request we currently have. If it is, then we don't have
2207 * to do anything. In other words, whichever events the current
2208 * AEN request is subscribing to, have already been subscribed
2209 * to.
2210 *
2211 * If the old_cmd is _not_ inclusive, then we have to abort
2212 * that command, form a class_locale that is superset of both
2213 * old and current and re-issue to the FW
2214 */
2215
2216 curr_aen.word = class_locale_word;
2217
2218 if (instance->aen_cmd) {
2219
2220 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
2221
2222 /*
2223 * A class whose enum value is smaller is inclusive of all
2224 * higher values. If a PROGRESS (= -1) was previously
2225 * registered, then a new registration requests for higher
2226 * classes need not be sent to FW. They are automatically
2227 * included.
2228 *
2229 * Locale numbers don't have such hierarchy. They are bitmap
2230 * values
2231 */
2232 if ((prev_aen.members.class <= curr_aen.members.class) &&
2233 !((prev_aen.members.locale & curr_aen.members.locale) ^
2234 curr_aen.members.locale)) {
2235 /*
2236 * Previously issued event registration includes
2237 * current request. Nothing to do.
2238 */
2239 return 0;
2240 } else {
2241 curr_aen.members.locale |= prev_aen.members.locale;
2242
2243 if (prev_aen.members.class < curr_aen.members.class)
2244 curr_aen.members.class = prev_aen.members.class;
2245
2246 instance->aen_cmd->abort_aen = 1;
2247 ret_val = megasas_issue_blocked_abort_cmd(instance,
2248 instance->
2249 aen_cmd);
2250
2251 if (ret_val) {
2252 printk(KERN_DEBUG "megasas: Failed to abort "
2253 "previous AEN command\n");
2254 return ret_val;
2255 }
2256 }
2257 }
2258
2259 cmd = megasas_get_cmd(instance);
2260
2261 if (!cmd)
2262 return -ENOMEM;
2263
2264 dcmd = &cmd->frame->dcmd;
2265
2266 memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
2267
2268 /*
2269 * Prepare DCMD for aen registration
2270 */
2271 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2272
2273 dcmd->cmd = MFI_CMD_DCMD;
2274 dcmd->cmd_status = 0x0;
2275 dcmd->sge_count = 1;
2276 dcmd->flags = MFI_FRAME_DIR_READ;
2277 dcmd->timeout = 0;
2278 dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
2279 dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
2280 dcmd->mbox.w[0] = seq_num;
2281 dcmd->mbox.w[1] = curr_aen.word;
2282 dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
2283 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
2284
2285 /*
2286 * Store reference to the cmd used to register for AEN. When an
2287 * application wants us to register for AEN, we have to abort this
2288 * cmd and re-register with a new EVENT LOCALE supplied by that app
2289 */
2290 instance->aen_cmd = cmd;
2291
2292 /*
2293 * Issue the aen registration frame
2294 */
2295 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
2296
2297 return 0;
2298 }
2299
2300 /**
2301 * megasas_start_aen - Subscribes to AEN during driver load time
2302 * @instance: Adapter soft state
2303 */
2304 static int megasas_start_aen(struct megasas_instance *instance)
2305 {
2306 struct megasas_evt_log_info eli;
2307 union megasas_evt_class_locale class_locale;
2308
2309 /*
2310 * Get the latest sequence number from FW
2311 */
2312 memset(&eli, 0, sizeof(eli));
2313
2314 if (megasas_get_seq_num(instance, &eli))
2315 return -1;
2316
2317 /*
2318 * Register AEN with FW for latest sequence number plus 1
2319 */
2320 class_locale.members.reserved = 0;
2321 class_locale.members.locale = MR_EVT_LOCALE_ALL;
2322 class_locale.members.class = MR_EVT_CLASS_DEBUG;
2323
2324 return megasas_register_aen(instance, eli.newest_seq_num + 1,
2325 class_locale.word);
2326 }
2327
2328 /**
2329 * megasas_io_attach - Attaches this driver to SCSI mid-layer
2330 * @instance: Adapter soft state
2331 */
2332 static int megasas_io_attach(struct megasas_instance *instance)
2333 {
2334 struct Scsi_Host *host = instance->host;
2335
2336 /*
2337 * Export parameters required by SCSI mid-layer
2338 */
2339 host->irq = instance->pdev->irq;
2340 host->unique_id = instance->unique_id;
2341 host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS;
2342 host->this_id = instance->init_id;
2343 host->sg_tablesize = instance->max_num_sge;
2344 host->max_sectors = instance->max_sectors_per_req;
2345 host->cmd_per_lun = 128;
2346 host->max_channel = MEGASAS_MAX_CHANNELS - 1;
2347 host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
2348 host->max_lun = MEGASAS_MAX_LUN;
2349 host->max_cmd_len = 16;
2350
2351 /*
2352 * Notify the mid-layer about the new controller
2353 */
2354 if (scsi_add_host(host, &instance->pdev->dev)) {
2355 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
2356 return -ENODEV;
2357 }
2358
2359 /*
2360 * Trigger SCSI to scan our drives
2361 */
2362 scsi_scan_host(host);
2363 return 0;
2364 }
2365
2366 static int
2367 megasas_set_dma_mask(struct pci_dev *pdev)
2368 {
2369 /*
2370 * All our contollers are capable of performing 64-bit DMA
2371 */
2372 if (IS_DMA64) {
2373 if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
2374
2375 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2376 goto fail_set_dma_mask;
2377 }
2378 } else {
2379 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2380 goto fail_set_dma_mask;
2381 }
2382 return 0;
2383
2384 fail_set_dma_mask:
2385 return 1;
2386 }
2387
2388 /**
2389 * megasas_probe_one - PCI hotplug entry point
2390 * @pdev: PCI device structure
2391 * @id: PCI ids of supported hotplugged adapter
2392 */
2393 static int __devinit
2394 megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
2395 {
2396 int rval;
2397 struct Scsi_Host *host;
2398 struct megasas_instance *instance;
2399
2400 /*
2401 * Announce PCI information
2402 */
2403 printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
2404 pdev->vendor, pdev->device, pdev->subsystem_vendor,
2405 pdev->subsystem_device);
2406
2407 printk("bus %d:slot %d:func %d\n",
2408 pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
2409
2410 /*
2411 * PCI prepping: enable device set bus mastering and dma mask
2412 */
2413 rval = pci_enable_device(pdev);
2414
2415 if (rval) {
2416 return rval;
2417 }
2418
2419 pci_set_master(pdev);
2420
2421 if (megasas_set_dma_mask(pdev))
2422 goto fail_set_dma_mask;
2423
2424 host = scsi_host_alloc(&megasas_template,
2425 sizeof(struct megasas_instance));
2426
2427 if (!host) {
2428 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
2429 goto fail_alloc_instance;
2430 }
2431
2432 instance = (struct megasas_instance *)host->hostdata;
2433 memset(instance, 0, sizeof(*instance));
2434
2435 instance->producer = pci_alloc_consistent(pdev, sizeof(u32),
2436 &instance->producer_h);
2437 instance->consumer = pci_alloc_consistent(pdev, sizeof(u32),
2438 &instance->consumer_h);
2439
2440 if (!instance->producer || !instance->consumer) {
2441 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2442 "producer, consumer\n");
2443 goto fail_alloc_dma_buf;
2444 }
2445
2446 *instance->producer = 0;
2447 *instance->consumer = 0;
2448
2449 instance->evt_detail = pci_alloc_consistent(pdev,
2450 sizeof(struct
2451 megasas_evt_detail),
2452 &instance->evt_detail_h);
2453
2454 if (!instance->evt_detail) {
2455 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2456 "event detail structure\n");
2457 goto fail_alloc_dma_buf;
2458 }
2459
2460 /*
2461 * Initialize locks and queues
2462 */
2463 INIT_LIST_HEAD(&instance->cmd_pool);
2464
2465 atomic_set(&instance->fw_outstanding,0);
2466
2467 init_waitqueue_head(&instance->int_cmd_wait_q);
2468 init_waitqueue_head(&instance->abort_cmd_wait_q);
2469
2470 spin_lock_init(&instance->cmd_pool_lock);
2471 spin_lock_init(&instance->completion_lock);
2472
2473 mutex_init(&instance->aen_mutex);
2474 sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
2475
2476 /*
2477 * Initialize PCI related and misc parameters
2478 */
2479 instance->pdev = pdev;
2480 instance->host = host;
2481 instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
2482 instance->init_id = MEGASAS_DEFAULT_INIT_ID;
2483
2484 megasas_dbg_lvl = 0;
2485 instance->flag = 0;
2486 instance->last_time = 0;
2487
2488 /*
2489 * Initialize MFI Firmware
2490 */
2491 if (megasas_init_mfi(instance))
2492 goto fail_init_mfi;
2493
2494 /*
2495 * Register IRQ
2496 */
2497 if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED, "megasas", instance)) {
2498 printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
2499 goto fail_irq;
2500 }
2501
2502 instance->instancet->enable_intr(instance->reg_set);
2503
2504 /*
2505 * Store instance in PCI softstate
2506 */
2507 pci_set_drvdata(pdev, instance);
2508
2509 /*
2510 * Add this controller to megasas_mgmt_info structure so that it
2511 * can be exported to management applications
2512 */
2513 megasas_mgmt_info.count++;
2514 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
2515 megasas_mgmt_info.max_index++;
2516
2517 /*
2518 * Initiate AEN (Asynchronous Event Notification)
2519 */
2520 if (megasas_start_aen(instance)) {
2521 printk(KERN_DEBUG "megasas: start aen failed\n");
2522 goto fail_start_aen;
2523 }
2524
2525 /*
2526 * Register with SCSI mid-layer
2527 */
2528 if (megasas_io_attach(instance))
2529 goto fail_io_attach;
2530
2531 return 0;
2532
2533 fail_start_aen:
2534 fail_io_attach:
2535 megasas_mgmt_info.count--;
2536 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
2537 megasas_mgmt_info.max_index--;
2538
2539 pci_set_drvdata(pdev, NULL);
2540 instance->instancet->disable_intr(instance->reg_set);
2541 free_irq(instance->pdev->irq, instance);
2542
2543 megasas_release_mfi(instance);
2544
2545 fail_irq:
2546 fail_init_mfi:
2547 fail_alloc_dma_buf:
2548 if (instance->evt_detail)
2549 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2550 instance->evt_detail,
2551 instance->evt_detail_h);
2552
2553 if (instance->producer)
2554 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2555 instance->producer_h);
2556 if (instance->consumer)
2557 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2558 instance->consumer_h);
2559 scsi_host_put(host);
2560
2561 fail_alloc_instance:
2562 fail_set_dma_mask:
2563 pci_disable_device(pdev);
2564
2565 return -ENODEV;
2566 }
2567
2568 /**
2569 * megasas_flush_cache - Requests FW to flush all its caches
2570 * @instance: Adapter soft state
2571 */
2572 static void megasas_flush_cache(struct megasas_instance *instance)
2573 {
2574 struct megasas_cmd *cmd;
2575 struct megasas_dcmd_frame *dcmd;
2576
2577 cmd = megasas_get_cmd(instance);
2578
2579 if (!cmd)
2580 return;
2581
2582 dcmd = &cmd->frame->dcmd;
2583
2584 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2585
2586 dcmd->cmd = MFI_CMD_DCMD;
2587 dcmd->cmd_status = 0x0;
2588 dcmd->sge_count = 0;
2589 dcmd->flags = MFI_FRAME_DIR_NONE;
2590 dcmd->timeout = 0;
2591 dcmd->data_xfer_len = 0;
2592 dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
2593 dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
2594
2595 megasas_issue_blocked_cmd(instance, cmd);
2596
2597 megasas_return_cmd(instance, cmd);
2598
2599 return;
2600 }
2601
2602 /**
2603 * megasas_shutdown_controller - Instructs FW to shutdown the controller
2604 * @instance: Adapter soft state
2605 * @opcode: Shutdown/Hibernate
2606 */
2607 static void megasas_shutdown_controller(struct megasas_instance *instance,
2608 u32 opcode)
2609 {
2610 struct megasas_cmd *cmd;
2611 struct megasas_dcmd_frame *dcmd;
2612
2613 cmd = megasas_get_cmd(instance);
2614
2615 if (!cmd)
2616 return;
2617
2618 if (instance->aen_cmd)
2619 megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
2620
2621 dcmd = &cmd->frame->dcmd;
2622
2623 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2624
2625 dcmd->cmd = MFI_CMD_DCMD;
2626 dcmd->cmd_status = 0x0;
2627 dcmd->sge_count = 0;
2628 dcmd->flags = MFI_FRAME_DIR_NONE;
2629 dcmd->timeout = 0;
2630 dcmd->data_xfer_len = 0;
2631 dcmd->opcode = opcode;
2632
2633 megasas_issue_blocked_cmd(instance, cmd);
2634
2635 megasas_return_cmd(instance, cmd);
2636
2637 return;
2638 }
2639
2640 /**
2641 * megasas_suspend - driver suspend entry point
2642 * @pdev: PCI device structure
2643 * @state: PCI power state to suspend routine
2644 */
2645 static int __devinit
2646 megasas_suspend(struct pci_dev *pdev, pm_message_t state)
2647 {
2648 struct Scsi_Host *host;
2649 struct megasas_instance *instance;
2650
2651 instance = pci_get_drvdata(pdev);
2652 host = instance->host;
2653
2654 if (poll_mode_io)
2655 del_timer_sync(&instance->io_completion_timer);
2656
2657 megasas_flush_cache(instance);
2658 megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
2659 tasklet_kill(&instance->isr_tasklet);
2660
2661 pci_set_drvdata(instance->pdev, instance);
2662 instance->instancet->disable_intr(instance->reg_set);
2663 free_irq(instance->pdev->irq, instance);
2664
2665 pci_save_state(pdev);
2666 pci_disable_device(pdev);
2667
2668 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2669
2670 return 0;
2671 }
2672
2673 /**
2674 * megasas_resume- driver resume entry point
2675 * @pdev: PCI device structure
2676 */
2677 static int __devinit
2678 megasas_resume(struct pci_dev *pdev)
2679 {
2680 int rval;
2681 struct Scsi_Host *host;
2682 struct megasas_instance *instance;
2683
2684 instance = pci_get_drvdata(pdev);
2685 host = instance->host;
2686 pci_set_power_state(pdev, PCI_D0);
2687 pci_enable_wake(pdev, PCI_D0, 0);
2688 pci_restore_state(pdev);
2689
2690 /*
2691 * PCI prepping: enable device set bus mastering and dma mask
2692 */
2693 rval = pci_enable_device(pdev);
2694
2695 if (rval) {
2696 printk(KERN_ERR "megasas: Enable device failed\n");
2697 return rval;
2698 }
2699
2700 pci_set_master(pdev);
2701
2702 if (megasas_set_dma_mask(pdev))
2703 goto fail_set_dma_mask;
2704
2705 /*
2706 * Initialize MFI Firmware
2707 */
2708
2709 *instance->producer = 0;
2710 *instance->consumer = 0;
2711
2712 atomic_set(&instance->fw_outstanding, 0);
2713
2714 /*
2715 * We expect the FW state to be READY
2716 */
2717 if (megasas_transition_to_ready(instance))
2718 goto fail_ready_state;
2719
2720 if (megasas_issue_init_mfi(instance))
2721 goto fail_init_mfi;
2722
2723 tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc,
2724 (unsigned long)instance);
2725
2726 /*
2727 * Register IRQ
2728 */
2729 if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED,
2730 "megasas", instance)) {
2731 printk(KERN_ERR "megasas: Failed to register IRQ\n");
2732 goto fail_irq;
2733 }
2734
2735 instance->instancet->enable_intr(instance->reg_set);
2736
2737 /*
2738 * Initiate AEN (Asynchronous Event Notification)
2739 */
2740 if (megasas_start_aen(instance))
2741 printk(KERN_ERR "megasas: Start AEN failed\n");
2742
2743 /* Initialize the cmd completion timer */
2744 if (poll_mode_io)
2745 megasas_start_timer(instance, &instance->io_completion_timer,
2746 megasas_io_completion_timer,
2747 MEGASAS_COMPLETION_TIMER_INTERVAL);
2748 return 0;
2749
2750 fail_irq:
2751 fail_init_mfi:
2752 if (instance->evt_detail)
2753 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2754 instance->evt_detail,
2755 instance->evt_detail_h);
2756
2757 if (instance->producer)
2758 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2759 instance->producer_h);
2760 if (instance->consumer)
2761 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2762 instance->consumer_h);
2763 scsi_host_put(host);
2764
2765 fail_set_dma_mask:
2766 fail_ready_state:
2767
2768 pci_disable_device(pdev);
2769
2770 return -ENODEV;
2771 }
2772
2773 /**
2774 * megasas_detach_one - PCI hot"un"plug entry point
2775 * @pdev: PCI device structure
2776 */
2777 static void megasas_detach_one(struct pci_dev *pdev)
2778 {
2779 int i;
2780 struct Scsi_Host *host;
2781 struct megasas_instance *instance;
2782
2783 instance = pci_get_drvdata(pdev);
2784 host = instance->host;
2785
2786 if (poll_mode_io)
2787 del_timer_sync(&instance->io_completion_timer);
2788
2789 scsi_remove_host(instance->host);
2790 megasas_flush_cache(instance);
2791 megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
2792 tasklet_kill(&instance->isr_tasklet);
2793
2794 /*
2795 * Take the instance off the instance array. Note that we will not
2796 * decrement the max_index. We let this array be sparse array
2797 */
2798 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
2799 if (megasas_mgmt_info.instance[i] == instance) {
2800 megasas_mgmt_info.count--;
2801 megasas_mgmt_info.instance[i] = NULL;
2802
2803 break;
2804 }
2805 }
2806
2807 pci_set_drvdata(instance->pdev, NULL);
2808
2809 instance->instancet->disable_intr(instance->reg_set);
2810
2811 free_irq(instance->pdev->irq, instance);
2812
2813 megasas_release_mfi(instance);
2814
2815 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2816 instance->evt_detail, instance->evt_detail_h);
2817
2818 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2819 instance->producer_h);
2820
2821 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2822 instance->consumer_h);
2823
2824 scsi_host_put(host);
2825
2826 pci_set_drvdata(pdev, NULL);
2827
2828 pci_disable_device(pdev);
2829
2830 return;
2831 }
2832
2833 /**
2834 * megasas_shutdown - Shutdown entry point
2835 * @device: Generic device structure
2836 */
2837 static void megasas_shutdown(struct pci_dev *pdev)
2838 {
2839 struct megasas_instance *instance = pci_get_drvdata(pdev);
2840 megasas_flush_cache(instance);
2841 }
2842
2843 /**
2844 * megasas_mgmt_open - char node "open" entry point
2845 */
2846 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
2847 {
2848 /*
2849 * Allow only those users with admin rights
2850 */
2851 if (!capable(CAP_SYS_ADMIN))
2852 return -EACCES;
2853
2854 return 0;
2855 }
2856
2857 /**
2858 * megasas_mgmt_release - char node "release" entry point
2859 */
2860 static int megasas_mgmt_release(struct inode *inode, struct file *filep)
2861 {
2862 filep->private_data = NULL;
2863 fasync_helper(-1, filep, 0, &megasas_async_queue);
2864
2865 return 0;
2866 }
2867
2868 /**
2869 * megasas_mgmt_fasync - Async notifier registration from applications
2870 *
2871 * This function adds the calling process to a driver global queue. When an
2872 * event occurs, SIGIO will be sent to all processes in this queue.
2873 */
2874 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
2875 {
2876 int rc;
2877
2878 mutex_lock(&megasas_async_queue_mutex);
2879
2880 rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
2881
2882 mutex_unlock(&megasas_async_queue_mutex);
2883
2884 if (rc >= 0) {
2885 /* For sanity check when we get ioctl */
2886 filep->private_data = filep;
2887 return 0;
2888 }
2889
2890 printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
2891
2892 return rc;
2893 }
2894
2895 /**
2896 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
2897 * @instance: Adapter soft state
2898 * @argp: User's ioctl packet
2899 */
2900 static int
2901 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
2902 struct megasas_iocpacket __user * user_ioc,
2903 struct megasas_iocpacket *ioc)
2904 {
2905 struct megasas_sge32 *kern_sge32;
2906 struct megasas_cmd *cmd;
2907 void *kbuff_arr[MAX_IOCTL_SGE];
2908 dma_addr_t buf_handle = 0;
2909 int error = 0, i;
2910 void *sense = NULL;
2911 dma_addr_t sense_handle;
2912 u32 *sense_ptr;
2913 unsigned long *sense_buff;
2914
2915 memset(kbuff_arr, 0, sizeof(kbuff_arr));
2916
2917 if (ioc->sge_count > MAX_IOCTL_SGE) {
2918 printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n",
2919 ioc->sge_count, MAX_IOCTL_SGE);
2920 return -EINVAL;
2921 }
2922
2923 cmd = megasas_get_cmd(instance);
2924 if (!cmd) {
2925 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
2926 return -ENOMEM;
2927 }
2928
2929 /*
2930 * User's IOCTL packet has 2 frames (maximum). Copy those two
2931 * frames into our cmd's frames. cmd->frame's context will get
2932 * overwritten when we copy from user's frames. So set that value
2933 * alone separately
2934 */
2935 memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
2936 cmd->frame->hdr.context = cmd->index;
2937
2938 /*
2939 * The management interface between applications and the fw uses
2940 * MFI frames. E.g, RAID configuration changes, LD property changes
2941 * etc are accomplishes through different kinds of MFI frames. The
2942 * driver needs to care only about substituting user buffers with
2943 * kernel buffers in SGLs. The location of SGL is embedded in the
2944 * struct iocpacket itself.
2945 */
2946 kern_sge32 = (struct megasas_sge32 *)
2947 ((unsigned long)cmd->frame + ioc->sgl_off);
2948
2949 /*
2950 * For each user buffer, create a mirror buffer and copy in
2951 */
2952 for (i = 0; i < ioc->sge_count; i++) {
2953 kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
2954 ioc->sgl[i].iov_len,
2955 &buf_handle, GFP_KERNEL);
2956 if (!kbuff_arr[i]) {
2957 printk(KERN_DEBUG "megasas: Failed to alloc "
2958 "kernel SGL buffer for IOCTL \n");
2959 error = -ENOMEM;
2960 goto out;
2961 }
2962
2963 /*
2964 * We don't change the dma_coherent_mask, so
2965 * pci_alloc_consistent only returns 32bit addresses
2966 */
2967 kern_sge32[i].phys_addr = (u32) buf_handle;
2968 kern_sge32[i].length = ioc->sgl[i].iov_len;
2969
2970 /*
2971 * We created a kernel buffer corresponding to the
2972 * user buffer. Now copy in from the user buffer
2973 */
2974 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
2975 (u32) (ioc->sgl[i].iov_len))) {
2976 error = -EFAULT;
2977 goto out;
2978 }
2979 }
2980
2981 if (ioc->sense_len) {
2982 sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
2983 &sense_handle, GFP_KERNEL);
2984 if (!sense) {
2985 error = -ENOMEM;
2986 goto out;
2987 }
2988
2989 sense_ptr =
2990 (u32 *) ((unsigned long)cmd->frame + ioc->sense_off);
2991 *sense_ptr = sense_handle;
2992 }
2993
2994 /*
2995 * Set the sync_cmd flag so that the ISR knows not to complete this
2996 * cmd to the SCSI mid-layer
2997 */
2998 cmd->sync_cmd = 1;
2999 megasas_issue_blocked_cmd(instance, cmd);
3000 cmd->sync_cmd = 0;
3001
3002 /*
3003 * copy out the kernel buffers to user buffers
3004 */
3005 for (i = 0; i < ioc->sge_count; i++) {
3006 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
3007 ioc->sgl[i].iov_len)) {
3008 error = -EFAULT;
3009 goto out;
3010 }
3011 }
3012
3013 /*
3014 * copy out the sense
3015 */
3016 if (ioc->sense_len) {
3017 /*
3018 * sense_buff points to the location that has the user
3019 * sense buffer address
3020 */
3021 sense_buff = (unsigned long *) ((unsigned long)ioc->frame.raw +
3022 ioc->sense_off);
3023
3024 if (copy_to_user((void __user *)(unsigned long)(*sense_buff),
3025 sense, ioc->sense_len)) {
3026 printk(KERN_ERR "megasas: Failed to copy out to user "
3027 "sense data\n");
3028 error = -EFAULT;
3029 goto out;
3030 }
3031 }
3032
3033 /*
3034 * copy the status codes returned by the fw
3035 */
3036 if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
3037 &cmd->frame->hdr.cmd_status, sizeof(u8))) {
3038 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
3039 error = -EFAULT;
3040 }
3041
3042 out:
3043 if (sense) {
3044 dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
3045 sense, sense_handle);
3046 }
3047
3048 for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
3049 dma_free_coherent(&instance->pdev->dev,
3050 kern_sge32[i].length,
3051 kbuff_arr[i], kern_sge32[i].phys_addr);
3052 }
3053
3054 megasas_return_cmd(instance, cmd);
3055 return error;
3056 }
3057
3058 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
3059 {
3060 int i;
3061
3062 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
3063
3064 if ((megasas_mgmt_info.instance[i]) &&
3065 (megasas_mgmt_info.instance[i]->host->host_no == host_no))
3066 return megasas_mgmt_info.instance[i];
3067 }
3068
3069 return NULL;
3070 }
3071
3072 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
3073 {
3074 struct megasas_iocpacket __user *user_ioc =
3075 (struct megasas_iocpacket __user *)arg;
3076 struct megasas_iocpacket *ioc;
3077 struct megasas_instance *instance;
3078 int error;
3079
3080 ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
3081 if (!ioc)
3082 return -ENOMEM;
3083
3084 if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
3085 error = -EFAULT;
3086 goto out_kfree_ioc;
3087 }
3088
3089 instance = megasas_lookup_instance(ioc->host_no);
3090 if (!instance) {
3091 error = -ENODEV;
3092 goto out_kfree_ioc;
3093 }
3094
3095 /*
3096 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
3097 */
3098 if (down_interruptible(&instance->ioctl_sem)) {
3099 error = -ERESTARTSYS;
3100 goto out_kfree_ioc;
3101 }
3102 error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
3103 up(&instance->ioctl_sem);
3104
3105 out_kfree_ioc:
3106 kfree(ioc);
3107 return error;
3108 }
3109
3110 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
3111 {
3112 struct megasas_instance *instance;
3113 struct megasas_aen aen;
3114 int error;
3115
3116 if (file->private_data != file) {
3117 printk(KERN_DEBUG "megasas: fasync_helper was not "
3118 "called first\n");
3119 return -EINVAL;
3120 }
3121
3122 if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
3123 return -EFAULT;
3124
3125 instance = megasas_lookup_instance(aen.host_no);
3126
3127 if (!instance)
3128 return -ENODEV;
3129
3130 mutex_lock(&instance->aen_mutex);
3131 error = megasas_register_aen(instance, aen.seq_num,
3132 aen.class_locale_word);
3133 mutex_unlock(&instance->aen_mutex);
3134 return error;
3135 }
3136
3137 /**
3138 * megasas_mgmt_ioctl - char node ioctl entry point
3139 */
3140 static long
3141 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
3142 {
3143 switch (cmd) {
3144 case MEGASAS_IOC_FIRMWARE:
3145 return megasas_mgmt_ioctl_fw(file, arg);
3146
3147 case MEGASAS_IOC_GET_AEN:
3148 return megasas_mgmt_ioctl_aen(file, arg);
3149 }
3150
3151 return -ENOTTY;
3152 }
3153
3154 #ifdef CONFIG_COMPAT
3155 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
3156 {
3157 struct compat_megasas_iocpacket __user *cioc =
3158 (struct compat_megasas_iocpacket __user *)arg;
3159 struct megasas_iocpacket __user *ioc =
3160 compat_alloc_user_space(sizeof(struct megasas_iocpacket));
3161 int i;
3162 int error = 0;
3163
3164 if (clear_user(ioc, sizeof(*ioc)))
3165 return -EFAULT;
3166
3167 if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
3168 copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
3169 copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
3170 copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
3171 copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
3172 copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
3173 return -EFAULT;
3174
3175 for (i = 0; i < MAX_IOCTL_SGE; i++) {
3176 compat_uptr_t ptr;
3177
3178 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
3179 put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
3180 copy_in_user(&ioc->sgl[i].iov_len,
3181 &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
3182 return -EFAULT;
3183 }
3184
3185 error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
3186
3187 if (copy_in_user(&cioc->frame.hdr.cmd_status,
3188 &ioc->frame.hdr.cmd_status, sizeof(u8))) {
3189 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
3190 return -EFAULT;
3191 }
3192 return error;
3193 }
3194
3195 static long
3196 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
3197 unsigned long arg)
3198 {
3199 switch (cmd) {
3200 case MEGASAS_IOC_FIRMWARE32:
3201 return megasas_mgmt_compat_ioctl_fw(file, arg);
3202 case MEGASAS_IOC_GET_AEN:
3203 return megasas_mgmt_ioctl_aen(file, arg);
3204 }
3205
3206 return -ENOTTY;
3207 }
3208 #endif
3209
3210 /*
3211 * File operations structure for management interface
3212 */
3213 static const struct file_operations megasas_mgmt_fops = {
3214 .owner = THIS_MODULE,
3215 .open = megasas_mgmt_open,
3216 .release = megasas_mgmt_release,
3217 .fasync = megasas_mgmt_fasync,
3218 .unlocked_ioctl = megasas_mgmt_ioctl,
3219 #ifdef CONFIG_COMPAT
3220 .compat_ioctl = megasas_mgmt_compat_ioctl,
3221 #endif
3222 };
3223
3224 /*
3225 * PCI hotplug support registration structure
3226 */
3227 static struct pci_driver megasas_pci_driver = {
3228
3229 .name = "megaraid_sas",
3230 .id_table = megasas_pci_table,
3231 .probe = megasas_probe_one,
3232 .remove = __devexit_p(megasas_detach_one),
3233 .suspend = megasas_suspend,
3234 .resume = megasas_resume,
3235 .shutdown = megasas_shutdown,
3236 };
3237
3238 /*
3239 * Sysfs driver attributes
3240 */
3241 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
3242 {
3243 return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
3244 MEGASAS_VERSION);
3245 }
3246
3247 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
3248
3249 static ssize_t
3250 megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
3251 {
3252 return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
3253 MEGASAS_RELDATE);
3254 }
3255
3256 static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
3257 NULL);
3258
3259 static ssize_t
3260 megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
3261 {
3262 return sprintf(buf, "%u\n", megasas_dbg_lvl);
3263 }
3264
3265 static ssize_t
3266 megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count)
3267 {
3268 int retval = count;
3269 if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){
3270 printk(KERN_ERR "megasas: could not set dbg_lvl\n");
3271 retval = -EINVAL;
3272 }
3273 return retval;
3274 }
3275
3276 static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUGO, megasas_sysfs_show_dbg_lvl,
3277 megasas_sysfs_set_dbg_lvl);
3278
3279 static ssize_t
3280 megasas_sysfs_show_poll_mode_io(struct device_driver *dd, char *buf)
3281 {
3282 return sprintf(buf, "%u\n", poll_mode_io);
3283 }
3284
3285 static ssize_t
3286 megasas_sysfs_set_poll_mode_io(struct device_driver *dd,
3287 const char *buf, size_t count)
3288 {
3289 int retval = count;
3290 int tmp = poll_mode_io;
3291 int i;
3292 struct megasas_instance *instance;
3293
3294 if (sscanf(buf, "%u", &poll_mode_io) < 1) {
3295 printk(KERN_ERR "megasas: could not set poll_mode_io\n");
3296 retval = -EINVAL;
3297 }
3298
3299 /*
3300 * Check if poll_mode_io is already set or is same as previous value
3301 */
3302 if ((tmp && poll_mode_io) || (tmp == poll_mode_io))
3303 goto out;
3304
3305 if (poll_mode_io) {
3306 /*
3307 * Start timers for all adapters
3308 */
3309 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
3310 instance = megasas_mgmt_info.instance[i];
3311 if (instance) {
3312 megasas_start_timer(instance,
3313 &instance->io_completion_timer,
3314 megasas_io_completion_timer,
3315 MEGASAS_COMPLETION_TIMER_INTERVAL);
3316 }
3317 }
3318 } else {
3319 /*
3320 * Delete timers for all adapters
3321 */
3322 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
3323 instance = megasas_mgmt_info.instance[i];
3324 if (instance)
3325 del_timer_sync(&instance->io_completion_timer);
3326 }
3327 }
3328
3329 out:
3330 return retval;
3331 }
3332
3333 static DRIVER_ATTR(poll_mode_io, S_IRUGO|S_IWUGO,
3334 megasas_sysfs_show_poll_mode_io,
3335 megasas_sysfs_set_poll_mode_io);
3336
3337 /**
3338 * megasas_init - Driver load entry point
3339 */
3340 static int __init megasas_init(void)
3341 {
3342 int rval;
3343
3344 /*
3345 * Announce driver version and other information
3346 */
3347 printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
3348 MEGASAS_EXT_VERSION);
3349
3350 memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
3351
3352 /*
3353 * Register character device node
3354 */
3355 rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
3356
3357 if (rval < 0) {
3358 printk(KERN_DEBUG "megasas: failed to open device node\n");
3359 return rval;
3360 }
3361
3362 megasas_mgmt_majorno = rval;
3363
3364 /*
3365 * Register ourselves as PCI hotplug module
3366 */
3367 rval = pci_register_driver(&megasas_pci_driver);
3368
3369 if (rval) {
3370 printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
3371 goto err_pcidrv;
3372 }
3373
3374 rval = driver_create_file(&megasas_pci_driver.driver,
3375 &driver_attr_version);
3376 if (rval)
3377 goto err_dcf_attr_ver;
3378 rval = driver_create_file(&megasas_pci_driver.driver,
3379 &driver_attr_release_date);
3380 if (rval)
3381 goto err_dcf_rel_date;
3382 rval = driver_create_file(&megasas_pci_driver.driver,
3383 &driver_attr_dbg_lvl);
3384 if (rval)
3385 goto err_dcf_dbg_lvl;
3386 rval = driver_create_file(&megasas_pci_driver.driver,
3387 &driver_attr_poll_mode_io);
3388 if (rval)
3389 goto err_dcf_poll_mode_io;
3390
3391 return rval;
3392
3393 err_dcf_poll_mode_io:
3394 driver_remove_file(&megasas_pci_driver.driver,
3395 &driver_attr_dbg_lvl);
3396 err_dcf_dbg_lvl:
3397 driver_remove_file(&megasas_pci_driver.driver,
3398 &driver_attr_release_date);
3399 err_dcf_rel_date:
3400 driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
3401 err_dcf_attr_ver:
3402 pci_unregister_driver(&megasas_pci_driver);
3403 err_pcidrv:
3404 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
3405 return rval;
3406 }
3407
3408 /**
3409 * megasas_exit - Driver unload entry point
3410 */
3411 static void __exit megasas_exit(void)
3412 {
3413 driver_remove_file(&megasas_pci_driver.driver,
3414 &driver_attr_poll_mode_io);
3415 driver_remove_file(&megasas_pci_driver.driver,
3416 &driver_attr_dbg_lvl);
3417 driver_remove_file(&megasas_pci_driver.driver,
3418 &driver_attr_release_date);
3419 driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
3420
3421 pci_unregister_driver(&megasas_pci_driver);
3422 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
3423 }
3424
3425 module_init(megasas_init);
3426 module_exit(megasas_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree