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staging: usbip: bugfix for isochronous packets and optimization
[zen-stable.git] / drivers / scsi / megaraid / megaraid_sas_base.c
blobbbd10c81fd9cee59796b0528175984f107e74c4d
1 /*
2 * Linux MegaRAID driver for SAS based RAID controllers
3 *
4 * Copyright (c) 2009-2011 LSI Corporation.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * FILE: megaraid_sas_base.c
21 * Version : v00.00.05.34-rc1
22 *
23 * Authors: LSI Corporation
24 * Sreenivas Bagalkote
25 * Sumant Patro
26 * Bo Yang
27 * Adam Radford <linuxraid@lsi.com>
28 *
29 * Send feedback to: <megaraidlinux@lsi.com>
30 *
31 * Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
32 * ATTN: Linuxraid
33 */
34
35 #include <linux/kernel.h>
36 #include <linux/types.h>
37 #include <linux/pci.h>
38 #include <linux/list.h>
39 #include <linux/moduleparam.h>
40 #include <linux/module.h>
41 #include <linux/spinlock.h>
42 #include <linux/interrupt.h>
43 #include <linux/delay.h>
44 #include <linux/uio.h>
45 #include <linux/slab.h>
46 #include <asm/uaccess.h>
47 #include <linux/fs.h>
48 #include <linux/compat.h>
49 #include <linux/blkdev.h>
50 #include <linux/mutex.h>
51 #include <linux/poll.h>
52
53 #include <scsi/scsi.h>
54 #include <scsi/scsi_cmnd.h>
55 #include <scsi/scsi_device.h>
56 #include <scsi/scsi_host.h>
57 #include "megaraid_sas_fusion.h"
58 #include "megaraid_sas.h"
59
60 /*
61 * poll_mode_io:1- schedule complete completion from q cmd
62 */
63 static unsigned int poll_mode_io;
64 module_param_named(poll_mode_io, poll_mode_io, int, 0);
65 MODULE_PARM_DESC(poll_mode_io,
66 "Complete cmds from IO path, (default=0)");
67
68 /*
69 * Number of sectors per IO command
70 * Will be set in megasas_init_mfi if user does not provide
71 */
72 static unsigned int max_sectors;
73 module_param_named(max_sectors, max_sectors, int, 0);
74 MODULE_PARM_DESC(max_sectors,
75 "Maximum number of sectors per IO command");
76
77 static int msix_disable;
78 module_param(msix_disable, int, S_IRUGO);
79 MODULE_PARM_DESC(msix_disable, "Disable MSI-X interrupt handling. Default: 0");
80
81 MODULE_LICENSE("GPL");
82 MODULE_VERSION(MEGASAS_VERSION);
83 MODULE_AUTHOR("megaraidlinux@lsi.com");
84 MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
85
86 int megasas_transition_to_ready(struct megasas_instance *instance);
87 static int megasas_get_pd_list(struct megasas_instance *instance);
88 static int megasas_issue_init_mfi(struct megasas_instance *instance);
89 static int megasas_register_aen(struct megasas_instance *instance,
90 u32 seq_num, u32 class_locale_word);
91 /*
92 * PCI ID table for all supported controllers
93 */
94 static struct pci_device_id megasas_pci_table[] = {
95
96 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
97 /* xscale IOP */
98 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
99 /* ppc IOP */
100 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
101 /* ppc IOP */
102 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
103 /* gen2*/
104 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
105 /* gen2*/
106 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
107 /* skinny*/
108 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
109 /* skinny*/
110 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
111 /* xscale IOP, vega */
112 {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
113 /* xscale IOP */
114 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
115 /* Fusion */
116 {}
117 };
118
119 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
120
121 static int megasas_mgmt_majorno;
122 static struct megasas_mgmt_info megasas_mgmt_info;
123 static struct fasync_struct *megasas_async_queue;
124 static DEFINE_MUTEX(megasas_async_queue_mutex);
125
126 static int megasas_poll_wait_aen;
127 static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
128 static u32 support_poll_for_event;
129 u32 megasas_dbg_lvl;
130 static u32 support_device_change;
131
132 /* define lock for aen poll */
133 spinlock_t poll_aen_lock;
134
135 void
136 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
137 u8 alt_status);
138 static u32
139 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs);
140 static int
141 megasas_adp_reset_gen2(struct megasas_instance *instance,
142 struct megasas_register_set __iomem *reg_set);
143 static irqreturn_t megasas_isr(int irq, void *devp);
144 static u32
145 megasas_init_adapter_mfi(struct megasas_instance *instance);
146 u32
147 megasas_build_and_issue_cmd(struct megasas_instance *instance,
148 struct scsi_cmnd *scmd);
149 static void megasas_complete_cmd_dpc(unsigned long instance_addr);
150 void
151 megasas_release_fusion(struct megasas_instance *instance);
152 int
153 megasas_ioc_init_fusion(struct megasas_instance *instance);
154 void
155 megasas_free_cmds_fusion(struct megasas_instance *instance);
156 u8
157 megasas_get_map_info(struct megasas_instance *instance);
158 int
159 megasas_sync_map_info(struct megasas_instance *instance);
160 int
161 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd);
162 void megasas_reset_reply_desc(struct megasas_instance *instance);
163 u8 MR_ValidateMapInfo(struct MR_FW_RAID_MAP_ALL *map,
164 struct LD_LOAD_BALANCE_INFO *lbInfo);
165 int megasas_reset_fusion(struct Scsi_Host *shost);
166 void megasas_fusion_ocr_wq(struct work_struct *work);
167
168 void
169 megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
170 {
171 instance->instancet->fire_cmd(instance,
172 cmd->frame_phys_addr, 0, instance->reg_set);
173 }
174
175 /**
176 * megasas_get_cmd - Get a command from the free pool
177 * @instance: Adapter soft state
178 *
179 * Returns a free command from the pool
180 */
181 struct megasas_cmd *megasas_get_cmd(struct megasas_instance
182 *instance)
183 {
184 unsigned long flags;
185 struct megasas_cmd *cmd = NULL;
186
187 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
188
189 if (!list_empty(&instance->cmd_pool)) {
190 cmd = list_entry((&instance->cmd_pool)->next,
191 struct megasas_cmd, list);
192 list_del_init(&cmd->list);
193 } else {
194 printk(KERN_ERR "megasas: Command pool empty!\n");
195 }
196
197 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
198 return cmd;
199 }
200
201 /**
202 * megasas_return_cmd - Return a cmd to free command pool
203 * @instance: Adapter soft state
204 * @cmd: Command packet to be returned to free command pool
205 */
206 inline void
207 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
208 {
209 unsigned long flags;
210
211 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
212
213 cmd->scmd = NULL;
214 cmd->frame_count = 0;
215 list_add_tail(&cmd->list, &instance->cmd_pool);
216
217 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
218 }
219
220
221 /**
222 * The following functions are defined for xscale
223 * (deviceid : 1064R, PERC5) controllers
224 */
225
226 /**
227 * megasas_enable_intr_xscale - Enables interrupts
228 * @regs: MFI register set
229 */
230 static inline void
231 megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs)
232 {
233 writel(0, &(regs)->outbound_intr_mask);
234
235 /* Dummy readl to force pci flush */
236 readl(&regs->outbound_intr_mask);
237 }
238
239 /**
240 * megasas_disable_intr_xscale -Disables interrupt
241 * @regs: MFI register set
242 */
243 static inline void
244 megasas_disable_intr_xscale(struct megasas_register_set __iomem * regs)
245 {
246 u32 mask = 0x1f;
247 writel(mask, &regs->outbound_intr_mask);
248 /* Dummy readl to force pci flush */
249 readl(&regs->outbound_intr_mask);
250 }
251
252 /**
253 * megasas_read_fw_status_reg_xscale - returns the current FW status value
254 * @regs: MFI register set
255 */
256 static u32
257 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
258 {
259 return readl(&(regs)->outbound_msg_0);
260 }
261 /**
262 * megasas_clear_interrupt_xscale - Check & clear interrupt
263 * @regs: MFI register set
264 */
265 static int
266 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
267 {
268 u32 status;
269 u32 mfiStatus = 0;
270 /*
271 * Check if it is our interrupt
272 */
273 status = readl(&regs->outbound_intr_status);
274
275 if (status & MFI_OB_INTR_STATUS_MASK)
276 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
277 if (status & MFI_XSCALE_OMR0_CHANGE_INTERRUPT)
278 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
279
280 /*
281 * Clear the interrupt by writing back the same value
282 */
283 if (mfiStatus)
284 writel(status, &regs->outbound_intr_status);
285
286 /* Dummy readl to force pci flush */
287 readl(&regs->outbound_intr_status);
288
289 return mfiStatus;
290 }
291
292 /**
293 * megasas_fire_cmd_xscale - Sends command to the FW
294 * @frame_phys_addr : Physical address of cmd
295 * @frame_count : Number of frames for the command
296 * @regs : MFI register set
297 */
298 static inline void
299 megasas_fire_cmd_xscale(struct megasas_instance *instance,
300 dma_addr_t frame_phys_addr,
301 u32 frame_count,
302 struct megasas_register_set __iomem *regs)
303 {
304 unsigned long flags;
305 spin_lock_irqsave(&instance->hba_lock, flags);
306 writel((frame_phys_addr >> 3)|(frame_count),
307 &(regs)->inbound_queue_port);
308 spin_unlock_irqrestore(&instance->hba_lock, flags);
309 }
310
311 /**
312 * megasas_adp_reset_xscale - For controller reset
313 * @regs: MFI register set
314 */
315 static int
316 megasas_adp_reset_xscale(struct megasas_instance *instance,
317 struct megasas_register_set __iomem *regs)
318 {
319 u32 i;
320 u32 pcidata;
321 writel(MFI_ADP_RESET, &regs->inbound_doorbell);
322
323 for (i = 0; i < 3; i++)
324 msleep(1000); /* sleep for 3 secs */
325 pcidata = 0;
326 pci_read_config_dword(instance->pdev, MFI_1068_PCSR_OFFSET, &pcidata);
327 printk(KERN_NOTICE "pcidata = %x\n", pcidata);
328 if (pcidata & 0x2) {
329 printk(KERN_NOTICE "mfi 1068 offset read=%x\n", pcidata);
330 pcidata &= ~0x2;
331 pci_write_config_dword(instance->pdev,
332 MFI_1068_PCSR_OFFSET, pcidata);
333
334 for (i = 0; i < 2; i++)
335 msleep(1000); /* need to wait 2 secs again */
336
337 pcidata = 0;
338 pci_read_config_dword(instance->pdev,
339 MFI_1068_FW_HANDSHAKE_OFFSET, &pcidata);
340 printk(KERN_NOTICE "1068 offset handshake read=%x\n", pcidata);
341 if ((pcidata & 0xffff0000) == MFI_1068_FW_READY) {
342 printk(KERN_NOTICE "1068 offset pcidt=%x\n", pcidata);
343 pcidata = 0;
344 pci_write_config_dword(instance->pdev,
345 MFI_1068_FW_HANDSHAKE_OFFSET, pcidata);
346 }
347 }
348 return 0;
349 }
350
351 /**
352 * megasas_check_reset_xscale - For controller reset check
353 * @regs: MFI register set
354 */
355 static int
356 megasas_check_reset_xscale(struct megasas_instance *instance,
357 struct megasas_register_set __iomem *regs)
358 {
359 u32 consumer;
360 consumer = *instance->consumer;
361
362 if ((instance->adprecovery != MEGASAS_HBA_OPERATIONAL) &&
363 (*instance->consumer == MEGASAS_ADPRESET_INPROG_SIGN)) {
364 return 1;
365 }
366 return 0;
367 }
368
369 static struct megasas_instance_template megasas_instance_template_xscale = {
370
371 .fire_cmd = megasas_fire_cmd_xscale,
372 .enable_intr = megasas_enable_intr_xscale,
373 .disable_intr = megasas_disable_intr_xscale,
374 .clear_intr = megasas_clear_intr_xscale,
375 .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
376 .adp_reset = megasas_adp_reset_xscale,
377 .check_reset = megasas_check_reset_xscale,
378 .service_isr = megasas_isr,
379 .tasklet = megasas_complete_cmd_dpc,
380 .init_adapter = megasas_init_adapter_mfi,
381 .build_and_issue_cmd = megasas_build_and_issue_cmd,
382 .issue_dcmd = megasas_issue_dcmd,
383 };
384
385 /**
386 * This is the end of set of functions & definitions specific
387 * to xscale (deviceid : 1064R, PERC5) controllers
388 */
389
390 /**
391 * The following functions are defined for ppc (deviceid : 0x60)
392 * controllers
393 */
394
395 /**
396 * megasas_enable_intr_ppc - Enables interrupts
397 * @regs: MFI register set
398 */
399 static inline void
400 megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs)
401 {
402 writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
403
404 writel(~0x80000000, &(regs)->outbound_intr_mask);
405
406 /* Dummy readl to force pci flush */
407 readl(&regs->outbound_intr_mask);
408 }
409
410 /**
411 * megasas_disable_intr_ppc - Disable interrupt
412 * @regs: MFI register set
413 */
414 static inline void
415 megasas_disable_intr_ppc(struct megasas_register_set __iomem * regs)
416 {
417 u32 mask = 0xFFFFFFFF;
418 writel(mask, &regs->outbound_intr_mask);
419 /* Dummy readl to force pci flush */
420 readl(&regs->outbound_intr_mask);
421 }
422
423 /**
424 * megasas_read_fw_status_reg_ppc - returns the current FW status value
425 * @regs: MFI register set
426 */
427 static u32
428 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
429 {
430 return readl(&(regs)->outbound_scratch_pad);
431 }
432
433 /**
434 * megasas_clear_interrupt_ppc - Check & clear interrupt
435 * @regs: MFI register set
436 */
437 static int
438 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
439 {
440 u32 status;
441 /*
442 * Check if it is our interrupt
443 */
444 status = readl(&regs->outbound_intr_status);
445
446 if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) {
447 return 0;
448 }
449
450 /*
451 * Clear the interrupt by writing back the same value
452 */
453 writel(status, &regs->outbound_doorbell_clear);
454
455 /* Dummy readl to force pci flush */
456 readl(&regs->outbound_doorbell_clear);
457
458 return 1;
459 }
460 /**
461 * megasas_fire_cmd_ppc - Sends command to the FW
462 * @frame_phys_addr : Physical address of cmd
463 * @frame_count : Number of frames for the command
464 * @regs : MFI register set
465 */
466 static inline void
467 megasas_fire_cmd_ppc(struct megasas_instance *instance,
468 dma_addr_t frame_phys_addr,
469 u32 frame_count,
470 struct megasas_register_set __iomem *regs)
471 {
472 unsigned long flags;
473 spin_lock_irqsave(&instance->hba_lock, flags);
474 writel((frame_phys_addr | (frame_count<<1))|1,
475 &(regs)->inbound_queue_port);
476 spin_unlock_irqrestore(&instance->hba_lock, flags);
477 }
478
479 /**
480 * megasas_adp_reset_ppc - For controller reset
481 * @regs: MFI register set
482 */
483 static int
484 megasas_adp_reset_ppc(struct megasas_instance *instance,
485 struct megasas_register_set __iomem *regs)
486 {
487 return 0;
488 }
489
490 /**
491 * megasas_check_reset_ppc - For controller reset check
492 * @regs: MFI register set
493 */
494 static int
495 megasas_check_reset_ppc(struct megasas_instance *instance,
496 struct megasas_register_set __iomem *regs)
497 {
498 return 0;
499 }
500 static struct megasas_instance_template megasas_instance_template_ppc = {
501
502 .fire_cmd = megasas_fire_cmd_ppc,
503 .enable_intr = megasas_enable_intr_ppc,
504 .disable_intr = megasas_disable_intr_ppc,
505 .clear_intr = megasas_clear_intr_ppc,
506 .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
507 .adp_reset = megasas_adp_reset_ppc,
508 .check_reset = megasas_check_reset_ppc,
509 .service_isr = megasas_isr,
510 .tasklet = megasas_complete_cmd_dpc,
511 .init_adapter = megasas_init_adapter_mfi,
512 .build_and_issue_cmd = megasas_build_and_issue_cmd,
513 .issue_dcmd = megasas_issue_dcmd,
514 };
515
516 /**
517 * megasas_enable_intr_skinny - Enables interrupts
518 * @regs: MFI register set
519 */
520 static inline void
521 megasas_enable_intr_skinny(struct megasas_register_set __iomem *regs)
522 {
523 writel(0xFFFFFFFF, &(regs)->outbound_intr_mask);
524
525 writel(~MFI_SKINNY_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
526
527 /* Dummy readl to force pci flush */
528 readl(&regs->outbound_intr_mask);
529 }
530
531 /**
532 * megasas_disable_intr_skinny - Disables interrupt
533 * @regs: MFI register set
534 */
535 static inline void
536 megasas_disable_intr_skinny(struct megasas_register_set __iomem *regs)
537 {
538 u32 mask = 0xFFFFFFFF;
539 writel(mask, &regs->outbound_intr_mask);
540 /* Dummy readl to force pci flush */
541 readl(&regs->outbound_intr_mask);
542 }
543
544 /**
545 * megasas_read_fw_status_reg_skinny - returns the current FW status value
546 * @regs: MFI register set
547 */
548 static u32
549 megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
550 {
551 return readl(&(regs)->outbound_scratch_pad);
552 }
553
554 /**
555 * megasas_clear_interrupt_skinny - Check & clear interrupt
556 * @regs: MFI register set
557 */
558 static int
559 megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
560 {
561 u32 status;
562 u32 mfiStatus = 0;
563
564 /*
565 * Check if it is our interrupt
566 */
567 status = readl(&regs->outbound_intr_status);
568
569 if (!(status & MFI_SKINNY_ENABLE_INTERRUPT_MASK)) {
570 return 0;
571 }
572
573 /*
574 * Check if it is our interrupt
575 */
576 if ((megasas_read_fw_status_reg_gen2(regs) & MFI_STATE_MASK) ==
577 MFI_STATE_FAULT) {
578 mfiStatus = MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
579 } else
580 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
581
582 /*
583 * Clear the interrupt by writing back the same value
584 */
585 writel(status, &regs->outbound_intr_status);
586
587 /*
588 * dummy read to flush PCI
589 */
590 readl(&regs->outbound_intr_status);
591
592 return mfiStatus;
593 }
594
595 /**
596 * megasas_fire_cmd_skinny - Sends command to the FW
597 * @frame_phys_addr : Physical address of cmd
598 * @frame_count : Number of frames for the command
599 * @regs : MFI register set
600 */
601 static inline void
602 megasas_fire_cmd_skinny(struct megasas_instance *instance,
603 dma_addr_t frame_phys_addr,
604 u32 frame_count,
605 struct megasas_register_set __iomem *regs)
606 {
607 unsigned long flags;
608 spin_lock_irqsave(&instance->hba_lock, flags);
609 writel(0, &(regs)->inbound_high_queue_port);
610 writel((frame_phys_addr | (frame_count<<1))|1,
611 &(regs)->inbound_low_queue_port);
612 spin_unlock_irqrestore(&instance->hba_lock, flags);
613 }
614
615 /**
616 * megasas_check_reset_skinny - For controller reset check
617 * @regs: MFI register set
618 */
619 static int
620 megasas_check_reset_skinny(struct megasas_instance *instance,
621 struct megasas_register_set __iomem *regs)
622 {
623 return 0;
624 }
625
626 static struct megasas_instance_template megasas_instance_template_skinny = {
627
628 .fire_cmd = megasas_fire_cmd_skinny,
629 .enable_intr = megasas_enable_intr_skinny,
630 .disable_intr = megasas_disable_intr_skinny,
631 .clear_intr = megasas_clear_intr_skinny,
632 .read_fw_status_reg = megasas_read_fw_status_reg_skinny,
633 .adp_reset = megasas_adp_reset_gen2,
634 .check_reset = megasas_check_reset_skinny,
635 .service_isr = megasas_isr,
636 .tasklet = megasas_complete_cmd_dpc,
637 .init_adapter = megasas_init_adapter_mfi,
638 .build_and_issue_cmd = megasas_build_and_issue_cmd,
639 .issue_dcmd = megasas_issue_dcmd,
640 };
641
642
643 /**
644 * The following functions are defined for gen2 (deviceid : 0x78 0x79)
645 * controllers
646 */
647
648 /**
649 * megasas_enable_intr_gen2 - Enables interrupts
650 * @regs: MFI register set
651 */
652 static inline void
653 megasas_enable_intr_gen2(struct megasas_register_set __iomem *regs)
654 {
655 writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
656
657 /* write ~0x00000005 (4 & 1) to the intr mask*/
658 writel(~MFI_GEN2_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
659
660 /* Dummy readl to force pci flush */
661 readl(&regs->outbound_intr_mask);
662 }
663
664 /**
665 * megasas_disable_intr_gen2 - Disables interrupt
666 * @regs: MFI register set
667 */
668 static inline void
669 megasas_disable_intr_gen2(struct megasas_register_set __iomem *regs)
670 {
671 u32 mask = 0xFFFFFFFF;
672 writel(mask, &regs->outbound_intr_mask);
673 /* Dummy readl to force pci flush */
674 readl(&regs->outbound_intr_mask);
675 }
676
677 /**
678 * megasas_read_fw_status_reg_gen2 - returns the current FW status value
679 * @regs: MFI register set
680 */
681 static u32
682 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
683 {
684 return readl(&(regs)->outbound_scratch_pad);
685 }
686
687 /**
688 * megasas_clear_interrupt_gen2 - Check & clear interrupt
689 * @regs: MFI register set
690 */
691 static int
692 megasas_clear_intr_gen2(struct megasas_register_set __iomem *regs)
693 {
694 u32 status;
695 u32 mfiStatus = 0;
696 /*
697 * Check if it is our interrupt
698 */
699 status = readl(&regs->outbound_intr_status);
700
701 if (status & MFI_GEN2_ENABLE_INTERRUPT_MASK) {
702 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
703 }
704 if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT) {
705 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
706 }
707
708 /*
709 * Clear the interrupt by writing back the same value
710 */
711 if (mfiStatus)
712 writel(status, &regs->outbound_doorbell_clear);
713
714 /* Dummy readl to force pci flush */
715 readl(&regs->outbound_intr_status);
716
717 return mfiStatus;
718 }
719 /**
720 * megasas_fire_cmd_gen2 - Sends command to the FW
721 * @frame_phys_addr : Physical address of cmd
722 * @frame_count : Number of frames for the command
723 * @regs : MFI register set
724 */
725 static inline void
726 megasas_fire_cmd_gen2(struct megasas_instance *instance,
727 dma_addr_t frame_phys_addr,
728 u32 frame_count,
729 struct megasas_register_set __iomem *regs)
730 {
731 unsigned long flags;
732 spin_lock_irqsave(&instance->hba_lock, flags);
733 writel((frame_phys_addr | (frame_count<<1))|1,
734 &(regs)->inbound_queue_port);
735 spin_unlock_irqrestore(&instance->hba_lock, flags);
736 }
737
738 /**
739 * megasas_adp_reset_gen2 - For controller reset
740 * @regs: MFI register set
741 */
742 static int
743 megasas_adp_reset_gen2(struct megasas_instance *instance,
744 struct megasas_register_set __iomem *reg_set)
745 {
746 u32 retry = 0 ;
747 u32 HostDiag;
748 u32 *seq_offset = &reg_set->seq_offset;
749 u32 *hostdiag_offset = &reg_set->host_diag;
750
751 if (instance->instancet == &megasas_instance_template_skinny) {
752 seq_offset = &reg_set->fusion_seq_offset;
753 hostdiag_offset = &reg_set->fusion_host_diag;
754 }
755
756 writel(0, seq_offset);
757 writel(4, seq_offset);
758 writel(0xb, seq_offset);
759 writel(2, seq_offset);
760 writel(7, seq_offset);
761 writel(0xd, seq_offset);
762
763 msleep(1000);
764
765 HostDiag = (u32)readl(hostdiag_offset);
766
767 while ( !( HostDiag & DIAG_WRITE_ENABLE) ) {
768 msleep(100);
769 HostDiag = (u32)readl(hostdiag_offset);
770 printk(KERN_NOTICE "RESETGEN2: retry=%x, hostdiag=%x\n",
771 retry, HostDiag);
772
773 if (retry++ >= 100)
774 return 1;
775
776 }
777
778 printk(KERN_NOTICE "ADP_RESET_GEN2: HostDiag=%x\n", HostDiag);
779
780 writel((HostDiag | DIAG_RESET_ADAPTER), hostdiag_offset);
781
782 ssleep(10);
783
784 HostDiag = (u32)readl(hostdiag_offset);
785 while ( ( HostDiag & DIAG_RESET_ADAPTER) ) {
786 msleep(100);
787 HostDiag = (u32)readl(hostdiag_offset);
788 printk(KERN_NOTICE "RESET_GEN2: retry=%x, hostdiag=%x\n",
789 retry, HostDiag);
790
791 if (retry++ >= 1000)
792 return 1;
793
794 }
795 return 0;
796 }
797
798 /**
799 * megasas_check_reset_gen2 - For controller reset check
800 * @regs: MFI register set
801 */
802 static int
803 megasas_check_reset_gen2(struct megasas_instance *instance,
804 struct megasas_register_set __iomem *regs)
805 {
806 if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
807 return 1;
808 }
809
810 return 0;
811 }
812
813 static struct megasas_instance_template megasas_instance_template_gen2 = {
814
815 .fire_cmd = megasas_fire_cmd_gen2,
816 .enable_intr = megasas_enable_intr_gen2,
817 .disable_intr = megasas_disable_intr_gen2,
818 .clear_intr = megasas_clear_intr_gen2,
819 .read_fw_status_reg = megasas_read_fw_status_reg_gen2,
820 .adp_reset = megasas_adp_reset_gen2,
821 .check_reset = megasas_check_reset_gen2,
822 .service_isr = megasas_isr,
823 .tasklet = megasas_complete_cmd_dpc,
824 .init_adapter = megasas_init_adapter_mfi,
825 .build_and_issue_cmd = megasas_build_and_issue_cmd,
826 .issue_dcmd = megasas_issue_dcmd,
827 };
828
829 /**
830 * This is the end of set of functions & definitions
831 * specific to gen2 (deviceid : 0x78, 0x79) controllers
832 */
833
834 /*
835 * Template added for TB (Fusion)
836 */
837 extern struct megasas_instance_template megasas_instance_template_fusion;
838
839 /**
840 * megasas_issue_polled - Issues a polling command
841 * @instance: Adapter soft state
842 * @cmd: Command packet to be issued
843 *
844 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
845 */
846 int
847 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
848 {
849
850 struct megasas_header *frame_hdr = &cmd->frame->hdr;
851
852 frame_hdr->cmd_status = 0xFF;
853 frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
854
855 /*
856 * Issue the frame using inbound queue port
857 */
858 instance->instancet->issue_dcmd(instance, cmd);
859
860 /*
861 * Wait for cmd_status to change
862 */
863 return wait_and_poll(instance, cmd);
864 }
865
866 /**
867 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
868 * @instance: Adapter soft state
869 * @cmd: Command to be issued
870 *
871 * This function waits on an event for the command to be returned from ISR.
872 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
873 * Used to issue ioctl commands.
874 */
875 static int
876 megasas_issue_blocked_cmd(struct megasas_instance *instance,
877 struct megasas_cmd *cmd)
878 {
879 cmd->cmd_status = ENODATA;
880
881 instance->instancet->issue_dcmd(instance, cmd);
882
883 wait_event(instance->int_cmd_wait_q, cmd->cmd_status != ENODATA);
884
885 return 0;
886 }
887
888 /**
889 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
890 * @instance: Adapter soft state
891 * @cmd_to_abort: Previously issued cmd to be aborted
892 *
893 * MFI firmware can abort previously issued AEN command (automatic event
894 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
895 * cmd and waits for return status.
896 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
897 */
898 static int
899 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
900 struct megasas_cmd *cmd_to_abort)
901 {
902 struct megasas_cmd *cmd;
903 struct megasas_abort_frame *abort_fr;
904
905 cmd = megasas_get_cmd(instance);
906
907 if (!cmd)
908 return -1;
909
910 abort_fr = &cmd->frame->abort;
911
912 /*
913 * Prepare and issue the abort frame
914 */
915 abort_fr->cmd = MFI_CMD_ABORT;
916 abort_fr->cmd_status = 0xFF;
917 abort_fr->flags = 0;
918 abort_fr->abort_context = cmd_to_abort->index;
919 abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
920 abort_fr->abort_mfi_phys_addr_hi = 0;
921
922 cmd->sync_cmd = 1;
923 cmd->cmd_status = 0xFF;
924
925 instance->instancet->issue_dcmd(instance, cmd);
926
927 /*
928 * Wait for this cmd to complete
929 */
930 wait_event(instance->abort_cmd_wait_q, cmd->cmd_status != 0xFF);
931 cmd->sync_cmd = 0;
932
933 megasas_return_cmd(instance, cmd);
934 return 0;
935 }
936
937 /**
938 * megasas_make_sgl32 - Prepares 32-bit SGL
939 * @instance: Adapter soft state
940 * @scp: SCSI command from the mid-layer
941 * @mfi_sgl: SGL to be filled in
942 *
943 * If successful, this function returns the number of SG elements. Otherwise,
944 * it returnes -1.
945 */
946 static int
947 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
948 union megasas_sgl *mfi_sgl)
949 {
950 int i;
951 int sge_count;
952 struct scatterlist *os_sgl;
953
954 sge_count = scsi_dma_map(scp);
955 BUG_ON(sge_count < 0);
956
957 if (sge_count) {
958 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
959 mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
960 mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
961 }
962 }
963 return sge_count;
964 }
965
966 /**
967 * megasas_make_sgl64 - Prepares 64-bit SGL
968 * @instance: Adapter soft state
969 * @scp: SCSI command from the mid-layer
970 * @mfi_sgl: SGL to be filled in
971 *
972 * If successful, this function returns the number of SG elements. Otherwise,
973 * it returnes -1.
974 */
975 static int
976 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
977 union megasas_sgl *mfi_sgl)
978 {
979 int i;
980 int sge_count;
981 struct scatterlist *os_sgl;
982
983 sge_count = scsi_dma_map(scp);
984 BUG_ON(sge_count < 0);
985
986 if (sge_count) {
987 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
988 mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
989 mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
990 }
991 }
992 return sge_count;
993 }
994
995 /**
996 * megasas_make_sgl_skinny - Prepares IEEE SGL
997 * @instance: Adapter soft state
998 * @scp: SCSI command from the mid-layer
999 * @mfi_sgl: SGL to be filled in
1000 *
1001 * If successful, this function returns the number of SG elements. Otherwise,
1002 * it returnes -1.
1003 */
1004 static int
1005 megasas_make_sgl_skinny(struct megasas_instance *instance,
1006 struct scsi_cmnd *scp, union megasas_sgl *mfi_sgl)
1007 {
1008 int i;
1009 int sge_count;
1010 struct scatterlist *os_sgl;
1011
1012 sge_count = scsi_dma_map(scp);
1013
1014 if (sge_count) {
1015 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1016 mfi_sgl->sge_skinny[i].length = sg_dma_len(os_sgl);
1017 mfi_sgl->sge_skinny[i].phys_addr =
1018 sg_dma_address(os_sgl);
1019 mfi_sgl->sge_skinny[i].flag = 0;
1020 }
1021 }
1022 return sge_count;
1023 }
1024
1025 /**
1026 * megasas_get_frame_count - Computes the number of frames
1027 * @frame_type : type of frame- io or pthru frame
1028 * @sge_count : number of sg elements
1029 *
1030 * Returns the number of frames required for numnber of sge's (sge_count)
1031 */
1032
1033 static u32 megasas_get_frame_count(struct megasas_instance *instance,
1034 u8 sge_count, u8 frame_type)
1035 {
1036 int num_cnt;
1037 int sge_bytes;
1038 u32 sge_sz;
1039 u32 frame_count=0;
1040
1041 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1042 sizeof(struct megasas_sge32);
1043
1044 if (instance->flag_ieee) {
1045 sge_sz = sizeof(struct megasas_sge_skinny);
1046 }
1047
1048 /*
1049 * Main frame can contain 2 SGEs for 64-bit SGLs and
1050 * 3 SGEs for 32-bit SGLs for ldio &
1051 * 1 SGEs for 64-bit SGLs and
1052 * 2 SGEs for 32-bit SGLs for pthru frame
1053 */
1054 if (unlikely(frame_type == PTHRU_FRAME)) {
1055 if (instance->flag_ieee == 1) {
1056 num_cnt = sge_count - 1;
1057 } else if (IS_DMA64)
1058 num_cnt = sge_count - 1;
1059 else
1060 num_cnt = sge_count - 2;
1061 } else {
1062 if (instance->flag_ieee == 1) {
1063 num_cnt = sge_count - 1;
1064 } else if (IS_DMA64)
1065 num_cnt = sge_count - 2;
1066 else
1067 num_cnt = sge_count - 3;
1068 }
1069
1070 if(num_cnt>0){
1071 sge_bytes = sge_sz * num_cnt;
1072
1073 frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
1074 ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
1075 }
1076 /* Main frame */
1077 frame_count +=1;
1078
1079 if (frame_count > 7)
1080 frame_count = 8;
1081 return frame_count;
1082 }
1083
1084 /**
1085 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
1086 * @instance: Adapter soft state
1087 * @scp: SCSI command
1088 * @cmd: Command to be prepared in
1089 *
1090 * This function prepares CDB commands. These are typcially pass-through
1091 * commands to the devices.
1092 */
1093 static int
1094 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
1095 struct megasas_cmd *cmd)
1096 {
1097 u32 is_logical;
1098 u32 device_id;
1099 u16 flags = 0;
1100 struct megasas_pthru_frame *pthru;
1101
1102 is_logical = MEGASAS_IS_LOGICAL(scp);
1103 device_id = MEGASAS_DEV_INDEX(instance, scp);
1104 pthru = (struct megasas_pthru_frame *)cmd->frame;
1105
1106 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1107 flags = MFI_FRAME_DIR_WRITE;
1108 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1109 flags = MFI_FRAME_DIR_READ;
1110 else if (scp->sc_data_direction == PCI_DMA_NONE)
1111 flags = MFI_FRAME_DIR_NONE;
1112
1113 if (instance->flag_ieee == 1) {
1114 flags |= MFI_FRAME_IEEE;
1115 }
1116
1117 /*
1118 * Prepare the DCDB frame
1119 */
1120 pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
1121 pthru->cmd_status = 0x0;
1122 pthru->scsi_status = 0x0;
1123 pthru->target_id = device_id;
1124 pthru->lun = scp->device->lun;
1125 pthru->cdb_len = scp->cmd_len;
1126 pthru->timeout = 0;
1127 pthru->pad_0 = 0;
1128 pthru->flags = flags;
1129 pthru->data_xfer_len = scsi_bufflen(scp);
1130
1131 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1132
1133 /*
1134 * If the command is for the tape device, set the
1135 * pthru timeout to the os layer timeout value.
1136 */
1137 if (scp->device->type == TYPE_TAPE) {
1138 if ((scp->request->timeout / HZ) > 0xFFFF)
1139 pthru->timeout = 0xFFFF;
1140 else
1141 pthru->timeout = scp->request->timeout / HZ;
1142 }
1143
1144 /*
1145 * Construct SGL
1146 */
1147 if (instance->flag_ieee == 1) {
1148 pthru->flags |= MFI_FRAME_SGL64;
1149 pthru->sge_count = megasas_make_sgl_skinny(instance, scp,
1150 &pthru->sgl);
1151 } else if (IS_DMA64) {
1152 pthru->flags |= MFI_FRAME_SGL64;
1153 pthru->sge_count = megasas_make_sgl64(instance, scp,
1154 &pthru->sgl);
1155 } else
1156 pthru->sge_count = megasas_make_sgl32(instance, scp,
1157 &pthru->sgl);
1158
1159 if (pthru->sge_count > instance->max_num_sge) {
1160 printk(KERN_ERR "megasas: DCDB two many SGE NUM=%x\n",
1161 pthru->sge_count);
1162 return 0;
1163 }
1164
1165 /*
1166 * Sense info specific
1167 */
1168 pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
1169 pthru->sense_buf_phys_addr_hi = 0;
1170 pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
1171
1172 /*
1173 * Compute the total number of frames this command consumes. FW uses
1174 * this number to pull sufficient number of frames from host memory.
1175 */
1176 cmd->frame_count = megasas_get_frame_count(instance, pthru->sge_count,
1177 PTHRU_FRAME);
1178
1179 return cmd->frame_count;
1180 }
1181
1182 /**
1183 * megasas_build_ldio - Prepares IOs to logical devices
1184 * @instance: Adapter soft state
1185 * @scp: SCSI command
1186 * @cmd: Command to be prepared
1187 *
1188 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
1189 */
1190 static int
1191 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
1192 struct megasas_cmd *cmd)
1193 {
1194 u32 device_id;
1195 u8 sc = scp->cmnd[0];
1196 u16 flags = 0;
1197 struct megasas_io_frame *ldio;
1198
1199 device_id = MEGASAS_DEV_INDEX(instance, scp);
1200 ldio = (struct megasas_io_frame *)cmd->frame;
1201
1202 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1203 flags = MFI_FRAME_DIR_WRITE;
1204 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1205 flags = MFI_FRAME_DIR_READ;
1206
1207 if (instance->flag_ieee == 1) {
1208 flags |= MFI_FRAME_IEEE;
1209 }
1210
1211 /*
1212 * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
1213 */
1214 ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
1215 ldio->cmd_status = 0x0;
1216 ldio->scsi_status = 0x0;
1217 ldio->target_id = device_id;
1218 ldio->timeout = 0;
1219 ldio->reserved_0 = 0;
1220 ldio->pad_0 = 0;
1221 ldio->flags = flags;
1222 ldio->start_lba_hi = 0;
1223 ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
1224
1225 /*
1226 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1227 */
1228 if (scp->cmd_len == 6) {
1229 ldio->lba_count = (u32) scp->cmnd[4];
1230 ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
1231 ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
1232
1233 ldio->start_lba_lo &= 0x1FFFFF;
1234 }
1235
1236 /*
1237 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1238 */
1239 else if (scp->cmd_len == 10) {
1240 ldio->lba_count = (u32) scp->cmnd[8] |
1241 ((u32) scp->cmnd[7] << 8);
1242 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1243 ((u32) scp->cmnd[3] << 16) |
1244 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1245 }
1246
1247 /*
1248 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1249 */
1250 else if (scp->cmd_len == 12) {
1251 ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
1252 ((u32) scp->cmnd[7] << 16) |
1253 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1254
1255 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1256 ((u32) scp->cmnd[3] << 16) |
1257 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1258 }
1259
1260 /*
1261 * 16-byte READ(0x88) or WRITE(0x8A) cdb
1262 */
1263 else if (scp->cmd_len == 16) {
1264 ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
1265 ((u32) scp->cmnd[11] << 16) |
1266 ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
1267
1268 ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
1269 ((u32) scp->cmnd[7] << 16) |
1270 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1271
1272 ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
1273 ((u32) scp->cmnd[3] << 16) |
1274 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1275
1276 }
1277
1278 /*
1279 * Construct SGL
1280 */
1281 if (instance->flag_ieee) {
1282 ldio->flags |= MFI_FRAME_SGL64;
1283 ldio->sge_count = megasas_make_sgl_skinny(instance, scp,
1284 &ldio->sgl);
1285 } else if (IS_DMA64) {
1286 ldio->flags |= MFI_FRAME_SGL64;
1287 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
1288 } else
1289 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
1290
1291 if (ldio->sge_count > instance->max_num_sge) {
1292 printk(KERN_ERR "megasas: build_ld_io: sge_count = %x\n",
1293 ldio->sge_count);
1294 return 0;
1295 }
1296
1297 /*
1298 * Sense info specific
1299 */
1300 ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
1301 ldio->sense_buf_phys_addr_hi = 0;
1302 ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
1303
1304 /*
1305 * Compute the total number of frames this command consumes. FW uses
1306 * this number to pull sufficient number of frames from host memory.
1307 */
1308 cmd->frame_count = megasas_get_frame_count(instance,
1309 ldio->sge_count, IO_FRAME);
1310
1311 return cmd->frame_count;
1312 }
1313
1314 /**
1315 * megasas_is_ldio - Checks if the cmd is for logical drive
1316 * @scmd: SCSI command
1317 *
1318 * Called by megasas_queue_command to find out if the command to be queued
1319 * is a logical drive command
1320 */
1321 inline int megasas_is_ldio(struct scsi_cmnd *cmd)
1322 {
1323 if (!MEGASAS_IS_LOGICAL(cmd))
1324 return 0;
1325 switch (cmd->cmnd[0]) {
1326 case READ_10:
1327 case WRITE_10:
1328 case READ_12:
1329 case WRITE_12:
1330 case READ_6:
1331 case WRITE_6:
1332 case READ_16:
1333 case WRITE_16:
1334 return 1;
1335 default:
1336 return 0;
1337 }
1338 }
1339
1340 /**
1341 * megasas_dump_pending_frames - Dumps the frame address of all pending cmds
1342 * in FW
1343 * @instance: Adapter soft state
1344 */
1345 static inline void
1346 megasas_dump_pending_frames(struct megasas_instance *instance)
1347 {
1348 struct megasas_cmd *cmd;
1349 int i,n;
1350 union megasas_sgl *mfi_sgl;
1351 struct megasas_io_frame *ldio;
1352 struct megasas_pthru_frame *pthru;
1353 u32 sgcount;
1354 u32 max_cmd = instance->max_fw_cmds;
1355
1356 printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
1357 printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
1358 if (IS_DMA64)
1359 printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
1360 else
1361 printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
1362
1363 printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
1364 for (i = 0; i < max_cmd; i++) {
1365 cmd = instance->cmd_list[i];
1366 if(!cmd->scmd)
1367 continue;
1368 printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
1369 if (megasas_is_ldio(cmd->scmd)){
1370 ldio = (struct megasas_io_frame *)cmd->frame;
1371 mfi_sgl = &ldio->sgl;
1372 sgcount = ldio->sge_count;
1373 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);
1374 }
1375 else {
1376 pthru = (struct megasas_pthru_frame *) cmd->frame;
1377 mfi_sgl = &pthru->sgl;
1378 sgcount = pthru->sge_count;
1379 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);
1380 }
1381 if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
1382 for (n = 0; n < sgcount; n++){
1383 if (IS_DMA64)
1384 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) ;
1385 else
1386 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl->sge32[n].length , mfi_sgl->sge32[n].phys_addr) ;
1387 }
1388 }
1389 printk(KERN_ERR "\n");
1390 } /*for max_cmd*/
1391 printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
1392 for (i = 0; i < max_cmd; i++) {
1393
1394 cmd = instance->cmd_list[i];
1395
1396 if(cmd->sync_cmd == 1){
1397 printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
1398 }
1399 }
1400 printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
1401 }
1402
1403 u32
1404 megasas_build_and_issue_cmd(struct megasas_instance *instance,
1405 struct scsi_cmnd *scmd)
1406 {
1407 struct megasas_cmd *cmd;
1408 u32 frame_count;
1409
1410 cmd = megasas_get_cmd(instance);
1411 if (!cmd)
1412 return SCSI_MLQUEUE_HOST_BUSY;
1413
1414 /*
1415 * Logical drive command
1416 */
1417 if (megasas_is_ldio(scmd))
1418 frame_count = megasas_build_ldio(instance, scmd, cmd);
1419 else
1420 frame_count = megasas_build_dcdb(instance, scmd, cmd);
1421
1422 if (!frame_count)
1423 goto out_return_cmd;
1424
1425 cmd->scmd = scmd;
1426 scmd->SCp.ptr = (char *)cmd;
1427
1428 /*
1429 * Issue the command to the FW
1430 */
1431 atomic_inc(&instance->fw_outstanding);
1432
1433 instance->instancet->fire_cmd(instance, cmd->frame_phys_addr,
1434 cmd->frame_count-1, instance->reg_set);
1435 /*
1436 * Check if we have pend cmds to be completed
1437 */
1438 if (poll_mode_io && atomic_read(&instance->fw_outstanding))
1439 tasklet_schedule(&instance->isr_tasklet);
1440
1441 return 0;
1442 out_return_cmd:
1443 megasas_return_cmd(instance, cmd);
1444 return 1;
1445 }
1446
1447
1448 /**
1449 * megasas_queue_command - Queue entry point
1450 * @scmd: SCSI command to be queued
1451 * @done: Callback entry point
1452 */
1453 static int
1454 megasas_queue_command_lck(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
1455 {
1456 struct megasas_instance *instance;
1457 unsigned long flags;
1458
1459 instance = (struct megasas_instance *)
1460 scmd->device->host->hostdata;
1461
1462 if (instance->issuepend_done == 0)
1463 return SCSI_MLQUEUE_HOST_BUSY;
1464
1465 spin_lock_irqsave(&instance->hba_lock, flags);
1466 if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
1467 spin_unlock_irqrestore(&instance->hba_lock, flags);
1468 return SCSI_MLQUEUE_HOST_BUSY;
1469 }
1470
1471 spin_unlock_irqrestore(&instance->hba_lock, flags);
1472
1473 scmd->scsi_done = done;
1474 scmd->result = 0;
1475
1476 if (MEGASAS_IS_LOGICAL(scmd) &&
1477 (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
1478 scmd->result = DID_BAD_TARGET << 16;
1479 goto out_done;
1480 }
1481
1482 switch (scmd->cmnd[0]) {
1483 case SYNCHRONIZE_CACHE:
1484 /*
1485 * FW takes care of flush cache on its own
1486 * No need to send it down
1487 */
1488 scmd->result = DID_OK << 16;
1489 goto out_done;
1490 default:
1491 break;
1492 }
1493
1494 if (instance->instancet->build_and_issue_cmd(instance, scmd)) {
1495 printk(KERN_ERR "megasas: Err returned from build_and_issue_cmd\n");
1496 return SCSI_MLQUEUE_HOST_BUSY;
1497 }
1498
1499 return 0;
1500
1501 out_done:
1502 done(scmd);
1503 return 0;
1504 }
1505
1506 static DEF_SCSI_QCMD(megasas_queue_command)
1507
1508 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
1509 {
1510 int i;
1511
1512 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
1513
1514 if ((megasas_mgmt_info.instance[i]) &&
1515 (megasas_mgmt_info.instance[i]->host->host_no == host_no))
1516 return megasas_mgmt_info.instance[i];
1517 }
1518
1519 return NULL;
1520 }
1521
1522 static int megasas_slave_configure(struct scsi_device *sdev)
1523 {
1524 u16 pd_index = 0;
1525 struct megasas_instance *instance ;
1526
1527 instance = megasas_lookup_instance(sdev->host->host_no);
1528
1529 /*
1530 * Don't export physical disk devices to the disk driver.
1531 *
1532 * FIXME: Currently we don't export them to the midlayer at all.
1533 * That will be fixed once LSI engineers have audited the
1534 * firmware for possible issues.
1535 */
1536 if (sdev->channel < MEGASAS_MAX_PD_CHANNELS &&
1537 sdev->type == TYPE_DISK) {
1538 pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
1539 sdev->id;
1540 if (instance->pd_list[pd_index].driveState ==
1541 MR_PD_STATE_SYSTEM) {
1542 blk_queue_rq_timeout(sdev->request_queue,
1543 MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
1544 return 0;
1545 }
1546 return -ENXIO;
1547 }
1548
1549 /*
1550 * The RAID firmware may require extended timeouts.
1551 */
1552 blk_queue_rq_timeout(sdev->request_queue,
1553 MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
1554 return 0;
1555 }
1556
1557 static int megasas_slave_alloc(struct scsi_device *sdev)
1558 {
1559 u16 pd_index = 0;
1560 struct megasas_instance *instance ;
1561 instance = megasas_lookup_instance(sdev->host->host_no);
1562 if ((sdev->channel < MEGASAS_MAX_PD_CHANNELS) &&
1563 (sdev->type == TYPE_DISK)) {
1564 /*
1565 * Open the OS scan to the SYSTEM PD
1566 */
1567 pd_index =
1568 (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
1569 sdev->id;
1570 if ((instance->pd_list[pd_index].driveState ==
1571 MR_PD_STATE_SYSTEM) &&
1572 (instance->pd_list[pd_index].driveType ==
1573 TYPE_DISK)) {
1574 return 0;
1575 }
1576 return -ENXIO;
1577 }
1578 return 0;
1579 }
1580
1581 void megaraid_sas_kill_hba(struct megasas_instance *instance)
1582 {
1583 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1584 (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
1585 (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)) {
1586 writel(MFI_STOP_ADP, &instance->reg_set->doorbell);
1587 } else {
1588 writel(MFI_STOP_ADP, &instance->reg_set->inbound_doorbell);
1589 }
1590 }
1591
1592 /**
1593 * megasas_check_and_restore_queue_depth - Check if queue depth needs to be
1594 * restored to max value
1595 * @instance: Adapter soft state
1596 *
1597 */
1598 void
1599 megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
1600 {
1601 unsigned long flags;
1602 if (instance->flag & MEGASAS_FW_BUSY
1603 && time_after(jiffies, instance->last_time + 5 * HZ)
1604 && atomic_read(&instance->fw_outstanding) < 17) {
1605
1606 spin_lock_irqsave(instance->host->host_lock, flags);
1607 instance->flag &= ~MEGASAS_FW_BUSY;
1608 if ((instance->pdev->device ==
1609 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1610 (instance->pdev->device ==
1611 PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
1612 instance->host->can_queue =
1613 instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
1614 } else
1615 instance->host->can_queue =
1616 instance->max_fw_cmds - MEGASAS_INT_CMDS;
1617
1618 spin_unlock_irqrestore(instance->host->host_lock, flags);
1619 }
1620 }
1621
1622 /**
1623 * megasas_complete_cmd_dpc - Returns FW's controller structure
1624 * @instance_addr: Address of adapter soft state
1625 *
1626 * Tasklet to complete cmds
1627 */
1628 static void megasas_complete_cmd_dpc(unsigned long instance_addr)
1629 {
1630 u32 producer;
1631 u32 consumer;
1632 u32 context;
1633 struct megasas_cmd *cmd;
1634 struct megasas_instance *instance =
1635 (struct megasas_instance *)instance_addr;
1636 unsigned long flags;
1637
1638 /* If we have already declared adapter dead, donot complete cmds */
1639 if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR )
1640 return;
1641
1642 spin_lock_irqsave(&instance->completion_lock, flags);
1643
1644 producer = *instance->producer;
1645 consumer = *instance->consumer;
1646
1647 while (consumer != producer) {
1648 context = instance->reply_queue[consumer];
1649 if (context >= instance->max_fw_cmds) {
1650 printk(KERN_ERR "Unexpected context value %x\n",
1651 context);
1652 BUG();
1653 }
1654
1655 cmd = instance->cmd_list[context];
1656
1657 megasas_complete_cmd(instance, cmd, DID_OK);
1658
1659 consumer++;
1660 if (consumer == (instance->max_fw_cmds + 1)) {
1661 consumer = 0;
1662 }
1663 }
1664
1665 *instance->consumer = producer;
1666
1667 spin_unlock_irqrestore(&instance->completion_lock, flags);
1668
1669 /*
1670 * Check if we can restore can_queue
1671 */
1672 megasas_check_and_restore_queue_depth(instance);
1673 }
1674
1675 static void
1676 megasas_internal_reset_defer_cmds(struct megasas_instance *instance);
1677
1678 static void
1679 process_fw_state_change_wq(struct work_struct *work);
1680
1681 void megasas_do_ocr(struct megasas_instance *instance)
1682 {
1683 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
1684 (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
1685 (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
1686 *instance->consumer = MEGASAS_ADPRESET_INPROG_SIGN;
1687 }
1688 instance->instancet->disable_intr(instance->reg_set);
1689 instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
1690 instance->issuepend_done = 0;
1691
1692 atomic_set(&instance->fw_outstanding, 0);
1693 megasas_internal_reset_defer_cmds(instance);
1694 process_fw_state_change_wq(&instance->work_init);
1695 }
1696
1697 /**
1698 * megasas_wait_for_outstanding - Wait for all outstanding cmds
1699 * @instance: Adapter soft state
1700 *
1701 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
1702 * complete all its outstanding commands. Returns error if one or more IOs
1703 * are pending after this time period. It also marks the controller dead.
1704 */
1705 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
1706 {
1707 int i;
1708 u32 reset_index;
1709 u32 wait_time = MEGASAS_RESET_WAIT_TIME;
1710 u8 adprecovery;
1711 unsigned long flags;
1712 struct list_head clist_local;
1713 struct megasas_cmd *reset_cmd;
1714 u32 fw_state;
1715 u8 kill_adapter_flag;
1716
1717 spin_lock_irqsave(&instance->hba_lock, flags);
1718 adprecovery = instance->adprecovery;
1719 spin_unlock_irqrestore(&instance->hba_lock, flags);
1720
1721 if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
1722
1723 INIT_LIST_HEAD(&clist_local);
1724 spin_lock_irqsave(&instance->hba_lock, flags);
1725 list_splice_init(&instance->internal_reset_pending_q,
1726 &clist_local);
1727 spin_unlock_irqrestore(&instance->hba_lock, flags);
1728
1729 printk(KERN_NOTICE "megasas: HBA reset wait ...\n");
1730 for (i = 0; i < wait_time; i++) {
1731 msleep(1000);
1732 spin_lock_irqsave(&instance->hba_lock, flags);
1733 adprecovery = instance->adprecovery;
1734 spin_unlock_irqrestore(&instance->hba_lock, flags);
1735 if (adprecovery == MEGASAS_HBA_OPERATIONAL)
1736 break;
1737 }
1738
1739 if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
1740 printk(KERN_NOTICE "megasas: reset: Stopping HBA.\n");
1741 spin_lock_irqsave(&instance->hba_lock, flags);
1742 instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
1743 spin_unlock_irqrestore(&instance->hba_lock, flags);
1744 return FAILED;
1745 }
1746
1747 reset_index = 0;
1748 while (!list_empty(&clist_local)) {
1749 reset_cmd = list_entry((&clist_local)->next,
1750 struct megasas_cmd, list);
1751 list_del_init(&reset_cmd->list);
1752 if (reset_cmd->scmd) {
1753 reset_cmd->scmd->result = DID_RESET << 16;
1754 printk(KERN_NOTICE "%d:%p reset [%02x], %#lx\n",
1755 reset_index, reset_cmd,
1756 reset_cmd->scmd->cmnd[0],
1757 reset_cmd->scmd->serial_number);
1758
1759 reset_cmd->scmd->scsi_done(reset_cmd->scmd);
1760 megasas_return_cmd(instance, reset_cmd);
1761 } else if (reset_cmd->sync_cmd) {
1762 printk(KERN_NOTICE "megasas:%p synch cmds"
1763 "reset queue\n",
1764 reset_cmd);
1765
1766 reset_cmd->cmd_status = ENODATA;
1767 instance->instancet->fire_cmd(instance,
1768 reset_cmd->frame_phys_addr,
1769 0, instance->reg_set);
1770 } else {
1771 printk(KERN_NOTICE "megasas: %p unexpected"
1772 "cmds lst\n",
1773 reset_cmd);
1774 }
1775 reset_index++;
1776 }
1777
1778 return SUCCESS;
1779 }
1780
1781 for (i = 0; i < wait_time; i++) {
1782
1783 int outstanding = atomic_read(&instance->fw_outstanding);
1784
1785 if (!outstanding)
1786 break;
1787
1788 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
1789 printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
1790 "commands to complete\n",i,outstanding);
1791 /*
1792 * Call cmd completion routine. Cmd to be
1793 * be completed directly without depending on isr.
1794 */
1795 megasas_complete_cmd_dpc((unsigned long)instance);
1796 }
1797
1798 msleep(1000);
1799 }
1800
1801 i = 0;
1802 kill_adapter_flag = 0;
1803 do {
1804 fw_state = instance->instancet->read_fw_status_reg(
1805 instance->reg_set) & MFI_STATE_MASK;
1806 if ((fw_state == MFI_STATE_FAULT) &&
1807 (instance->disableOnlineCtrlReset == 0)) {
1808 if (i == 3) {
1809 kill_adapter_flag = 2;
1810 break;
1811 }
1812 megasas_do_ocr(instance);
1813 kill_adapter_flag = 1;
1814
1815 /* wait for 1 secs to let FW finish the pending cmds */
1816 msleep(1000);
1817 }
1818 i++;
1819 } while (i <= 3);
1820
1821 if (atomic_read(&instance->fw_outstanding) &&
1822 !kill_adapter_flag) {
1823 if (instance->disableOnlineCtrlReset == 0) {
1824
1825 megasas_do_ocr(instance);
1826
1827 /* wait for 5 secs to let FW finish the pending cmds */
1828 for (i = 0; i < wait_time; i++) {
1829 int outstanding =
1830 atomic_read(&instance->fw_outstanding);
1831 if (!outstanding)
1832 return SUCCESS;
1833 msleep(1000);
1834 }
1835 }
1836 }
1837
1838 if (atomic_read(&instance->fw_outstanding) ||
1839 (kill_adapter_flag == 2)) {
1840 printk(KERN_NOTICE "megaraid_sas: pending cmds after reset\n");
1841 /*
1842 * Send signal to FW to stop processing any pending cmds.
1843 * The controller will be taken offline by the OS now.
1844 */
1845 if ((instance->pdev->device ==
1846 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1847 (instance->pdev->device ==
1848 PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
1849 writel(MFI_STOP_ADP,
1850 &instance->reg_set->doorbell);
1851 } else {
1852 writel(MFI_STOP_ADP,
1853 &instance->reg_set->inbound_doorbell);
1854 }
1855 megasas_dump_pending_frames(instance);
1856 spin_lock_irqsave(&instance->hba_lock, flags);
1857 instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
1858 spin_unlock_irqrestore(&instance->hba_lock, flags);
1859 return FAILED;
1860 }
1861
1862 printk(KERN_NOTICE "megaraid_sas: no pending cmds after reset\n");
1863
1864 return SUCCESS;
1865 }
1866
1867 /**
1868 * megasas_generic_reset - Generic reset routine
1869 * @scmd: Mid-layer SCSI command
1870 *
1871 * This routine implements a generic reset handler for device, bus and host
1872 * reset requests. Device, bus and host specific reset handlers can use this
1873 * function after they do their specific tasks.
1874 */
1875 static int megasas_generic_reset(struct scsi_cmnd *scmd)
1876 {
1877 int ret_val;
1878 struct megasas_instance *instance;
1879
1880 instance = (struct megasas_instance *)scmd->device->host->hostdata;
1881
1882 scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x retries=%x\n",
1883 scmd->serial_number, scmd->cmnd[0], scmd->retries);
1884
1885 if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
1886 printk(KERN_ERR "megasas: cannot recover from previous reset "
1887 "failures\n");
1888 return FAILED;
1889 }
1890
1891 ret_val = megasas_wait_for_outstanding(instance);
1892 if (ret_val == SUCCESS)
1893 printk(KERN_NOTICE "megasas: reset successful \n");
1894 else
1895 printk(KERN_ERR "megasas: failed to do reset\n");
1896
1897 return ret_val;
1898 }
1899
1900 /**
1901 * megasas_reset_timer - quiesce the adapter if required
1902 * @scmd: scsi cmnd
1903 *
1904 * Sets the FW busy flag and reduces the host->can_queue if the
1905 * cmd has not been completed within the timeout period.
1906 */
1907 static enum
1908 blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
1909 {
1910 struct megasas_cmd *cmd = (struct megasas_cmd *)scmd->SCp.ptr;
1911 struct megasas_instance *instance;
1912 unsigned long flags;
1913
1914 if (time_after(jiffies, scmd->jiffies_at_alloc +
1915 (MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
1916 return BLK_EH_NOT_HANDLED;
1917 }
1918
1919 instance = cmd->instance;
1920 if (!(instance->flag & MEGASAS_FW_BUSY)) {
1921 /* FW is busy, throttle IO */
1922 spin_lock_irqsave(instance->host->host_lock, flags);
1923
1924 instance->host->can_queue = 16;
1925 instance->last_time = jiffies;
1926 instance->flag |= MEGASAS_FW_BUSY;
1927
1928 spin_unlock_irqrestore(instance->host->host_lock, flags);
1929 }
1930 return BLK_EH_RESET_TIMER;
1931 }
1932
1933 /**
1934 * megasas_reset_device - Device reset handler entry point
1935 */
1936 static int megasas_reset_device(struct scsi_cmnd *scmd)
1937 {
1938 int ret;
1939
1940 /*
1941 * First wait for all commands to complete
1942 */
1943 ret = megasas_generic_reset(scmd);
1944
1945 return ret;
1946 }
1947
1948 /**
1949 * megasas_reset_bus_host - Bus & host reset handler entry point
1950 */
1951 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
1952 {
1953 int ret;
1954 struct megasas_instance *instance;
1955 instance = (struct megasas_instance *)scmd->device->host->hostdata;
1956
1957 /*
1958 * First wait for all commands to complete
1959 */
1960 if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)
1961 ret = megasas_reset_fusion(scmd->device->host);
1962 else
1963 ret = megasas_generic_reset(scmd);
1964
1965 return ret;
1966 }
1967
1968 /**
1969 * megasas_bios_param - Returns disk geometry for a disk
1970 * @sdev: device handle
1971 * @bdev: block device
1972 * @capacity: drive capacity
1973 * @geom: geometry parameters
1974 */
1975 static int
1976 megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
1977 sector_t capacity, int geom[])
1978 {
1979 int heads;
1980 int sectors;
1981 sector_t cylinders;
1982 unsigned long tmp;
1983 /* Default heads (64) & sectors (32) */
1984 heads = 64;
1985 sectors = 32;
1986
1987 tmp = heads * sectors;
1988 cylinders = capacity;
1989
1990 sector_div(cylinders, tmp);
1991
1992 /*
1993 * Handle extended translation size for logical drives > 1Gb
1994 */
1995
1996 if (capacity >= 0x200000) {
1997 heads = 255;
1998 sectors = 63;
1999 tmp = heads*sectors;
2000 cylinders = capacity;
2001 sector_div(cylinders, tmp);
2002 }
2003
2004 geom[0] = heads;
2005 geom[1] = sectors;
2006 geom[2] = cylinders;
2007
2008 return 0;
2009 }
2010
2011 static void megasas_aen_polling(struct work_struct *work);
2012
2013 /**
2014 * megasas_service_aen - Processes an event notification
2015 * @instance: Adapter soft state
2016 * @cmd: AEN command completed by the ISR
2017 *
2018 * For AEN, driver sends a command down to FW that is held by the FW till an
2019 * event occurs. When an event of interest occurs, FW completes the command
2020 * that it was previously holding.
2021 *
2022 * This routines sends SIGIO signal to processes that have registered with the
2023 * driver for AEN.
2024 */
2025 static void
2026 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
2027 {
2028 unsigned long flags;
2029 /*
2030 * Don't signal app if it is just an aborted previously registered aen
2031 */
2032 if ((!cmd->abort_aen) && (instance->unload == 0)) {
2033 spin_lock_irqsave(&poll_aen_lock, flags);
2034 megasas_poll_wait_aen = 1;
2035 spin_unlock_irqrestore(&poll_aen_lock, flags);
2036 wake_up(&megasas_poll_wait);
2037 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
2038 }
2039 else
2040 cmd->abort_aen = 0;
2041
2042 instance->aen_cmd = NULL;
2043 megasas_return_cmd(instance, cmd);
2044
2045 if ((instance->unload == 0) &&
2046 ((instance->issuepend_done == 1))) {
2047 struct megasas_aen_event *ev;
2048 ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
2049 if (!ev) {
2050 printk(KERN_ERR "megasas_service_aen: out of memory\n");
2051 } else {
2052 ev->instance = instance;
2053 instance->ev = ev;
2054 INIT_WORK(&ev->hotplug_work, megasas_aen_polling);
2055 schedule_delayed_work(
2056 (struct delayed_work *)&ev->hotplug_work, 0);
2057 }
2058 }
2059 }
2060
2061 /*
2062 * Scsi host template for megaraid_sas driver
2063 */
2064 static struct scsi_host_template megasas_template = {
2065
2066 .module = THIS_MODULE,
2067 .name = "LSI SAS based MegaRAID driver",
2068 .proc_name = "megaraid_sas",
2069 .slave_configure = megasas_slave_configure,
2070 .slave_alloc = megasas_slave_alloc,
2071 .queuecommand = megasas_queue_command,
2072 .eh_device_reset_handler = megasas_reset_device,
2073 .eh_bus_reset_handler = megasas_reset_bus_host,
2074 .eh_host_reset_handler = megasas_reset_bus_host,
2075 .eh_timed_out = megasas_reset_timer,
2076 .bios_param = megasas_bios_param,
2077 .use_clustering = ENABLE_CLUSTERING,
2078 };
2079
2080 /**
2081 * megasas_complete_int_cmd - Completes an internal command
2082 * @instance: Adapter soft state
2083 * @cmd: Command to be completed
2084 *
2085 * The megasas_issue_blocked_cmd() function waits for a command to complete
2086 * after it issues a command. This function wakes up that waiting routine by
2087 * calling wake_up() on the wait queue.
2088 */
2089 static void
2090 megasas_complete_int_cmd(struct megasas_instance *instance,
2091 struct megasas_cmd *cmd)
2092 {
2093 cmd->cmd_status = cmd->frame->io.cmd_status;
2094
2095 if (cmd->cmd_status == ENODATA) {
2096 cmd->cmd_status = 0;
2097 }
2098 wake_up(&instance->int_cmd_wait_q);
2099 }
2100
2101 /**
2102 * megasas_complete_abort - Completes aborting a command
2103 * @instance: Adapter soft state
2104 * @cmd: Cmd that was issued to abort another cmd
2105 *
2106 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
2107 * after it issues an abort on a previously issued command. This function
2108 * wakes up all functions waiting on the same wait queue.
2109 */
2110 static void
2111 megasas_complete_abort(struct megasas_instance *instance,
2112 struct megasas_cmd *cmd)
2113 {
2114 if (cmd->sync_cmd) {
2115 cmd->sync_cmd = 0;
2116 cmd->cmd_status = 0;
2117 wake_up(&instance->abort_cmd_wait_q);
2118 }
2119
2120 return;
2121 }
2122
2123 /**
2124 * megasas_complete_cmd - Completes a command
2125 * @instance: Adapter soft state
2126 * @cmd: Command to be completed
2127 * @alt_status: If non-zero, use this value as status to
2128 * SCSI mid-layer instead of the value returned
2129 * by the FW. This should be used if caller wants
2130 * an alternate status (as in the case of aborted
2131 * commands)
2132 */
2133 void
2134 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
2135 u8 alt_status)
2136 {
2137 int exception = 0;
2138 struct megasas_header *hdr = &cmd->frame->hdr;
2139 unsigned long flags;
2140 struct fusion_context *fusion = instance->ctrl_context;
2141
2142 /* flag for the retry reset */
2143 cmd->retry_for_fw_reset = 0;
2144
2145 if (cmd->scmd)
2146 cmd->scmd->SCp.ptr = NULL;
2147
2148 switch (hdr->cmd) {
2149
2150 case MFI_CMD_PD_SCSI_IO:
2151 case MFI_CMD_LD_SCSI_IO:
2152
2153 /*
2154 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
2155 * issued either through an IO path or an IOCTL path. If it
2156 * was via IOCTL, we will send it to internal completion.
2157 */
2158 if (cmd->sync_cmd) {
2159 cmd->sync_cmd = 0;
2160 megasas_complete_int_cmd(instance, cmd);
2161 break;
2162 }
2163
2164 case MFI_CMD_LD_READ:
2165 case MFI_CMD_LD_WRITE:
2166
2167 if (alt_status) {
2168 cmd->scmd->result = alt_status << 16;
2169 exception = 1;
2170 }
2171
2172 if (exception) {
2173
2174 atomic_dec(&instance->fw_outstanding);
2175
2176 scsi_dma_unmap(cmd->scmd);
2177 cmd->scmd->scsi_done(cmd->scmd);
2178 megasas_return_cmd(instance, cmd);
2179
2180 break;
2181 }
2182
2183 switch (hdr->cmd_status) {
2184
2185 case MFI_STAT_OK:
2186 cmd->scmd->result = DID_OK << 16;
2187 break;
2188
2189 case MFI_STAT_SCSI_IO_FAILED:
2190 case MFI_STAT_LD_INIT_IN_PROGRESS:
2191 cmd->scmd->result =
2192 (DID_ERROR << 16) | hdr->scsi_status;
2193 break;
2194
2195 case MFI_STAT_SCSI_DONE_WITH_ERROR:
2196
2197 cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
2198
2199 if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
2200 memset(cmd->scmd->sense_buffer, 0,
2201 SCSI_SENSE_BUFFERSIZE);
2202 memcpy(cmd->scmd->sense_buffer, cmd->sense,
2203 hdr->sense_len);
2204
2205 cmd->scmd->result |= DRIVER_SENSE << 24;
2206 }
2207
2208 break;
2209
2210 case MFI_STAT_LD_OFFLINE:
2211 case MFI_STAT_DEVICE_NOT_FOUND:
2212 cmd->scmd->result = DID_BAD_TARGET << 16;
2213 break;
2214
2215 default:
2216 printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
2217 hdr->cmd_status);
2218 cmd->scmd->result = DID_ERROR << 16;
2219 break;
2220 }
2221
2222 atomic_dec(&instance->fw_outstanding);
2223
2224 scsi_dma_unmap(cmd->scmd);
2225 cmd->scmd->scsi_done(cmd->scmd);
2226 megasas_return_cmd(instance, cmd);
2227
2228 break;
2229
2230 case MFI_CMD_SMP:
2231 case MFI_CMD_STP:
2232 case MFI_CMD_DCMD:
2233 /* Check for LD map update */
2234 if ((cmd->frame->dcmd.opcode == MR_DCMD_LD_MAP_GET_INFO) &&
2235 (cmd->frame->dcmd.mbox.b[1] == 1)) {
2236 spin_lock_irqsave(instance->host->host_lock, flags);
2237 if (cmd->frame->hdr.cmd_status != 0) {
2238 if (cmd->frame->hdr.cmd_status !=
2239 MFI_STAT_NOT_FOUND)
2240 printk(KERN_WARNING "megasas: map sync"
2241 "failed, status = 0x%x.\n",
2242 cmd->frame->hdr.cmd_status);
2243 else {
2244 megasas_return_cmd(instance, cmd);
2245 spin_unlock_irqrestore(
2246 instance->host->host_lock,
2247 flags);
2248 break;
2249 }
2250 } else
2251 instance->map_id++;
2252 megasas_return_cmd(instance, cmd);
2253 if (MR_ValidateMapInfo(
2254 fusion->ld_map[(instance->map_id & 1)],
2255 fusion->load_balance_info))
2256 fusion->fast_path_io = 1;
2257 else
2258 fusion->fast_path_io = 0;
2259 megasas_sync_map_info(instance);
2260 spin_unlock_irqrestore(instance->host->host_lock,
2261 flags);
2262 break;
2263 }
2264 if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_GET_INFO ||
2265 cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_GET) {
2266 spin_lock_irqsave(&poll_aen_lock, flags);
2267 megasas_poll_wait_aen = 0;
2268 spin_unlock_irqrestore(&poll_aen_lock, flags);
2269 }
2270
2271 /*
2272 * See if got an event notification
2273 */
2274 if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
2275 megasas_service_aen(instance, cmd);
2276 else
2277 megasas_complete_int_cmd(instance, cmd);
2278
2279 break;
2280
2281 case MFI_CMD_ABORT:
2282 /*
2283 * Cmd issued to abort another cmd returned
2284 */
2285 megasas_complete_abort(instance, cmd);
2286 break;
2287
2288 default:
2289 printk("megasas: Unknown command completed! [0x%X]\n",
2290 hdr->cmd);
2291 break;
2292 }
2293 }
2294
2295 /**
2296 * megasas_issue_pending_cmds_again - issue all pending cmds
2297 * in FW again because of the fw reset
2298 * @instance: Adapter soft state
2299 */
2300 static inline void
2301 megasas_issue_pending_cmds_again(struct megasas_instance *instance)
2302 {
2303 struct megasas_cmd *cmd;
2304 struct list_head clist_local;
2305 union megasas_evt_class_locale class_locale;
2306 unsigned long flags;
2307 u32 seq_num;
2308
2309 INIT_LIST_HEAD(&clist_local);
2310 spin_lock_irqsave(&instance->hba_lock, flags);
2311 list_splice_init(&instance->internal_reset_pending_q, &clist_local);
2312 spin_unlock_irqrestore(&instance->hba_lock, flags);
2313
2314 while (!list_empty(&clist_local)) {
2315 cmd = list_entry((&clist_local)->next,
2316 struct megasas_cmd, list);
2317 list_del_init(&cmd->list);
2318
2319 if (cmd->sync_cmd || cmd->scmd) {
2320 printk(KERN_NOTICE "megaraid_sas: command %p, %p:%d"
2321 "detected to be pending while HBA reset.\n",
2322 cmd, cmd->scmd, cmd->sync_cmd);
2323
2324 cmd->retry_for_fw_reset++;
2325
2326 if (cmd->retry_for_fw_reset == 3) {
2327 printk(KERN_NOTICE "megaraid_sas: cmd %p, %p:%d"
2328 "was tried multiple times during reset."
2329 "Shutting down the HBA\n",
2330 cmd, cmd->scmd, cmd->sync_cmd);
2331 megaraid_sas_kill_hba(instance);
2332
2333 instance->adprecovery =
2334 MEGASAS_HW_CRITICAL_ERROR;
2335 return;
2336 }
2337 }
2338
2339 if (cmd->sync_cmd == 1) {
2340 if (cmd->scmd) {
2341 printk(KERN_NOTICE "megaraid_sas: unexpected"
2342 "cmd attached to internal command!\n");
2343 }
2344 printk(KERN_NOTICE "megasas: %p synchronous cmd"
2345 "on the internal reset queue,"
2346 "issue it again.\n", cmd);
2347 cmd->cmd_status = ENODATA;
2348 instance->instancet->fire_cmd(instance,
2349 cmd->frame_phys_addr ,
2350 0, instance->reg_set);
2351 } else if (cmd->scmd) {
2352 printk(KERN_NOTICE "megasas: %p scsi cmd [%02x],%#lx"
2353 "detected on the internal queue, issue again.\n",
2354 cmd, cmd->scmd->cmnd[0], cmd->scmd->serial_number);
2355
2356 atomic_inc(&instance->fw_outstanding);
2357 instance->instancet->fire_cmd(instance,
2358 cmd->frame_phys_addr,
2359 cmd->frame_count-1, instance->reg_set);
2360 } else {
2361 printk(KERN_NOTICE "megasas: %p unexpected cmd on the"
2362 "internal reset defer list while re-issue!!\n",
2363 cmd);
2364 }
2365 }
2366
2367 if (instance->aen_cmd) {
2368 printk(KERN_NOTICE "megaraid_sas: aen_cmd in def process\n");
2369 megasas_return_cmd(instance, instance->aen_cmd);
2370
2371 instance->aen_cmd = NULL;
2372 }
2373
2374 /*
2375 * Initiate AEN (Asynchronous Event Notification)
2376 */
2377 seq_num = instance->last_seq_num;
2378 class_locale.members.reserved = 0;
2379 class_locale.members.locale = MR_EVT_LOCALE_ALL;
2380 class_locale.members.class = MR_EVT_CLASS_DEBUG;
2381
2382 megasas_register_aen(instance, seq_num, class_locale.word);
2383 }
2384
2385 /**
2386 * Move the internal reset pending commands to a deferred queue.
2387 *
2388 * We move the commands pending at internal reset time to a
2389 * pending queue. This queue would be flushed after successful
2390 * completion of the internal reset sequence. if the internal reset
2391 * did not complete in time, the kernel reset handler would flush
2392 * these commands.
2393 **/
2394 static void
2395 megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
2396 {
2397 struct megasas_cmd *cmd;
2398 int i;
2399 u32 max_cmd = instance->max_fw_cmds;
2400 u32 defer_index;
2401 unsigned long flags;
2402
2403 defer_index = 0;
2404 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
2405 for (i = 0; i < max_cmd; i++) {
2406 cmd = instance->cmd_list[i];
2407 if (cmd->sync_cmd == 1 || cmd->scmd) {
2408 printk(KERN_NOTICE "megasas: moving cmd[%d]:%p:%d:%p"
2409 "on the defer queue as internal\n",
2410 defer_index, cmd, cmd->sync_cmd, cmd->scmd);
2411
2412 if (!list_empty(&cmd->list)) {
2413 printk(KERN_NOTICE "megaraid_sas: ERROR while"
2414 " moving this cmd:%p, %d %p, it was"
2415 "discovered on some list?\n",
2416 cmd, cmd->sync_cmd, cmd->scmd);
2417
2418 list_del_init(&cmd->list);
2419 }
2420 defer_index++;
2421 list_add_tail(&cmd->list,
2422 &instance->internal_reset_pending_q);
2423 }
2424 }
2425 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
2426 }
2427
2428
2429 static void
2430 process_fw_state_change_wq(struct work_struct *work)
2431 {
2432 struct megasas_instance *instance =
2433 container_of(work, struct megasas_instance, work_init);
2434 u32 wait;
2435 unsigned long flags;
2436
2437 if (instance->adprecovery != MEGASAS_ADPRESET_SM_INFAULT) {
2438 printk(KERN_NOTICE "megaraid_sas: error, recovery st %x \n",
2439 instance->adprecovery);
2440 return ;
2441 }
2442
2443 if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
2444 printk(KERN_NOTICE "megaraid_sas: FW detected to be in fault"
2445 "state, restarting it...\n");
2446
2447 instance->instancet->disable_intr(instance->reg_set);
2448 atomic_set(&instance->fw_outstanding, 0);
2449
2450 atomic_set(&instance->fw_reset_no_pci_access, 1);
2451 instance->instancet->adp_reset(instance, instance->reg_set);
2452 atomic_set(&instance->fw_reset_no_pci_access, 0 );
2453
2454 printk(KERN_NOTICE "megaraid_sas: FW restarted successfully,"
2455 "initiating next stage...\n");
2456
2457 printk(KERN_NOTICE "megaraid_sas: HBA recovery state machine,"
2458 "state 2 starting...\n");
2459
2460 /*waitting for about 20 second before start the second init*/
2461 for (wait = 0; wait < 30; wait++) {
2462 msleep(1000);
2463 }
2464
2465 if (megasas_transition_to_ready(instance)) {
2466 printk(KERN_NOTICE "megaraid_sas:adapter not ready\n");
2467
2468 megaraid_sas_kill_hba(instance);
2469 instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
2470 return ;
2471 }
2472
2473 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
2474 (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
2475 (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)
2476 ) {
2477 *instance->consumer = *instance->producer;
2478 } else {
2479 *instance->consumer = 0;
2480 *instance->producer = 0;
2481 }
2482
2483 megasas_issue_init_mfi(instance);
2484
2485 spin_lock_irqsave(&instance->hba_lock, flags);
2486 instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2487 spin_unlock_irqrestore(&instance->hba_lock, flags);
2488 instance->instancet->enable_intr(instance->reg_set);
2489
2490 megasas_issue_pending_cmds_again(instance);
2491 instance->issuepend_done = 1;
2492 }
2493 return ;
2494 }
2495
2496 /**
2497 * megasas_deplete_reply_queue - Processes all completed commands
2498 * @instance: Adapter soft state
2499 * @alt_status: Alternate status to be returned to
2500 * SCSI mid-layer instead of the status
2501 * returned by the FW
2502 * Note: this must be called with hba lock held
2503 */
2504 static int
2505 megasas_deplete_reply_queue(struct megasas_instance *instance,
2506 u8 alt_status)
2507 {
2508 u32 mfiStatus;
2509 u32 fw_state;
2510
2511 if ((mfiStatus = instance->instancet->check_reset(instance,
2512 instance->reg_set)) == 1) {
2513 return IRQ_HANDLED;
2514 }
2515
2516 if ((mfiStatus = instance->instancet->clear_intr(
2517 instance->reg_set)
2518 ) == 0) {
2519 /* Hardware may not set outbound_intr_status in MSI-X mode */
2520 if (!instance->msi_flag)
2521 return IRQ_NONE;
2522 }
2523
2524 instance->mfiStatus = mfiStatus;
2525
2526 if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
2527 fw_state = instance->instancet->read_fw_status_reg(
2528 instance->reg_set) & MFI_STATE_MASK;
2529
2530 if (fw_state != MFI_STATE_FAULT) {
2531 printk(KERN_NOTICE "megaraid_sas: fw state:%x\n",
2532 fw_state);
2533 }
2534
2535 if ((fw_state == MFI_STATE_FAULT) &&
2536 (instance->disableOnlineCtrlReset == 0)) {
2537 printk(KERN_NOTICE "megaraid_sas: wait adp restart\n");
2538
2539 if ((instance->pdev->device ==
2540 PCI_DEVICE_ID_LSI_SAS1064R) ||
2541 (instance->pdev->device ==
2542 PCI_DEVICE_ID_DELL_PERC5) ||
2543 (instance->pdev->device ==
2544 PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
2545
2546 *instance->consumer =
2547 MEGASAS_ADPRESET_INPROG_SIGN;
2548 }
2549
2550
2551 instance->instancet->disable_intr(instance->reg_set);
2552 instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
2553 instance->issuepend_done = 0;
2554
2555 atomic_set(&instance->fw_outstanding, 0);
2556 megasas_internal_reset_defer_cmds(instance);
2557
2558 printk(KERN_NOTICE "megasas: fwState=%x, stage:%d\n",
2559 fw_state, instance->adprecovery);
2560
2561 schedule_work(&instance->work_init);
2562 return IRQ_HANDLED;
2563
2564 } else {
2565 printk(KERN_NOTICE "megasas: fwstate:%x, dis_OCR=%x\n",
2566 fw_state, instance->disableOnlineCtrlReset);
2567 }
2568 }
2569
2570 tasklet_schedule(&instance->isr_tasklet);
2571 return IRQ_HANDLED;
2572 }
2573 /**
2574 * megasas_isr - isr entry point
2575 */
2576 static irqreturn_t megasas_isr(int irq, void *devp)
2577 {
2578 struct megasas_instance *instance;
2579 unsigned long flags;
2580 irqreturn_t rc;
2581
2582 if (atomic_read(
2583 &(((struct megasas_instance *)devp)->fw_reset_no_pci_access)))
2584 return IRQ_HANDLED;
2585
2586 instance = (struct megasas_instance *)devp;
2587
2588 spin_lock_irqsave(&instance->hba_lock, flags);
2589 rc = megasas_deplete_reply_queue(instance, DID_OK);
2590 spin_unlock_irqrestore(&instance->hba_lock, flags);
2591
2592 return rc;
2593 }
2594
2595 /**
2596 * megasas_transition_to_ready - Move the FW to READY state
2597 * @instance: Adapter soft state
2598 *
2599 * During the initialization, FW passes can potentially be in any one of
2600 * several possible states. If the FW in operational, waiting-for-handshake
2601 * states, driver must take steps to bring it to ready state. Otherwise, it
2602 * has to wait for the ready state.
2603 */
2604 int
2605 megasas_transition_to_ready(struct megasas_instance* instance)
2606 {
2607 int i;
2608 u8 max_wait;
2609 u32 fw_state;
2610 u32 cur_state;
2611 u32 abs_state, curr_abs_state;
2612
2613 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
2614
2615 if (fw_state != MFI_STATE_READY)
2616 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
2617 " state\n");
2618
2619 while (fw_state != MFI_STATE_READY) {
2620
2621 abs_state =
2622 instance->instancet->read_fw_status_reg(instance->reg_set);
2623
2624 switch (fw_state) {
2625
2626 case MFI_STATE_FAULT:
2627
2628 printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
2629 max_wait = MEGASAS_RESET_WAIT_TIME;
2630 cur_state = MFI_STATE_FAULT;
2631 break;
2632
2633 case MFI_STATE_WAIT_HANDSHAKE:
2634 /*
2635 * Set the CLR bit in inbound doorbell
2636 */
2637 if ((instance->pdev->device ==
2638 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2639 (instance->pdev->device ==
2640 PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
2641 (instance->pdev->device ==
2642 PCI_DEVICE_ID_LSI_FUSION)) {
2643 writel(
2644 MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
2645 &instance->reg_set->doorbell);
2646 } else {
2647 writel(
2648 MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
2649 &instance->reg_set->inbound_doorbell);
2650 }
2651
2652 max_wait = MEGASAS_RESET_WAIT_TIME;
2653 cur_state = MFI_STATE_WAIT_HANDSHAKE;
2654 break;
2655
2656 case MFI_STATE_BOOT_MESSAGE_PENDING:
2657 if ((instance->pdev->device ==
2658 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2659 (instance->pdev->device ==
2660 PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
2661 (instance->pdev->device ==
2662 PCI_DEVICE_ID_LSI_FUSION)) {
2663 writel(MFI_INIT_HOTPLUG,
2664 &instance->reg_set->doorbell);
2665 } else
2666 writel(MFI_INIT_HOTPLUG,
2667 &instance->reg_set->inbound_doorbell);
2668
2669 max_wait = MEGASAS_RESET_WAIT_TIME;
2670 cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
2671 break;
2672
2673 case MFI_STATE_OPERATIONAL:
2674 /*
2675 * Bring it to READY state; assuming max wait 10 secs
2676 */
2677 instance->instancet->disable_intr(instance->reg_set);
2678 if ((instance->pdev->device ==
2679 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2680 (instance->pdev->device ==
2681 PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
2682 (instance->pdev->device
2683 == PCI_DEVICE_ID_LSI_FUSION)) {
2684 writel(MFI_RESET_FLAGS,
2685 &instance->reg_set->doorbell);
2686 if (instance->pdev->device ==
2687 PCI_DEVICE_ID_LSI_FUSION) {
2688 for (i = 0; i < (10 * 1000); i += 20) {
2689 if (readl(
2690 &instance->
2691 reg_set->
2692 doorbell) & 1)
2693 msleep(20);
2694 else
2695 break;
2696 }
2697 }
2698 } else
2699 writel(MFI_RESET_FLAGS,
2700 &instance->reg_set->inbound_doorbell);
2701
2702 max_wait = MEGASAS_RESET_WAIT_TIME;
2703 cur_state = MFI_STATE_OPERATIONAL;
2704 break;
2705
2706 case MFI_STATE_UNDEFINED:
2707 /*
2708 * This state should not last for more than 2 seconds
2709 */
2710 max_wait = MEGASAS_RESET_WAIT_TIME;
2711 cur_state = MFI_STATE_UNDEFINED;
2712 break;
2713
2714 case MFI_STATE_BB_INIT:
2715 max_wait = MEGASAS_RESET_WAIT_TIME;
2716 cur_state = MFI_STATE_BB_INIT;
2717 break;
2718
2719 case MFI_STATE_FW_INIT:
2720 max_wait = MEGASAS_RESET_WAIT_TIME;
2721 cur_state = MFI_STATE_FW_INIT;
2722 break;
2723
2724 case MFI_STATE_FW_INIT_2:
2725 max_wait = MEGASAS_RESET_WAIT_TIME;
2726 cur_state = MFI_STATE_FW_INIT_2;
2727 break;
2728
2729 case MFI_STATE_DEVICE_SCAN:
2730 max_wait = MEGASAS_RESET_WAIT_TIME;
2731 cur_state = MFI_STATE_DEVICE_SCAN;
2732 break;
2733
2734 case MFI_STATE_FLUSH_CACHE:
2735 max_wait = MEGASAS_RESET_WAIT_TIME;
2736 cur_state = MFI_STATE_FLUSH_CACHE;
2737 break;
2738
2739 default:
2740 printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
2741 fw_state);
2742 return -ENODEV;
2743 }
2744
2745 /*
2746 * The cur_state should not last for more than max_wait secs
2747 */
2748 for (i = 0; i < (max_wait * 1000); i++) {
2749 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
2750 MFI_STATE_MASK ;
2751 curr_abs_state =
2752 instance->instancet->read_fw_status_reg(instance->reg_set);
2753
2754 if (abs_state == curr_abs_state) {
2755 msleep(1);
2756 } else
2757 break;
2758 }
2759
2760 /*
2761 * Return error if fw_state hasn't changed after max_wait
2762 */
2763 if (curr_abs_state == abs_state) {
2764 printk(KERN_DEBUG "FW state [%d] hasn't changed "
2765 "in %d secs\n", fw_state, max_wait);
2766 return -ENODEV;
2767 }
2768 }
2769 printk(KERN_INFO "megasas: FW now in Ready state\n");
2770
2771 return 0;
2772 }
2773
2774 /**
2775 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
2776 * @instance: Adapter soft state
2777 */
2778 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
2779 {
2780 int i;
2781 u32 max_cmd = instance->max_mfi_cmds;
2782 struct megasas_cmd *cmd;
2783
2784 if (!instance->frame_dma_pool)
2785 return;
2786
2787 /*
2788 * Return all frames to pool
2789 */
2790 for (i = 0; i < max_cmd; i++) {
2791
2792 cmd = instance->cmd_list[i];
2793
2794 if (cmd->frame)
2795 pci_pool_free(instance->frame_dma_pool, cmd->frame,
2796 cmd->frame_phys_addr);
2797
2798 if (cmd->sense)
2799 pci_pool_free(instance->sense_dma_pool, cmd->sense,
2800 cmd->sense_phys_addr);
2801 }
2802
2803 /*
2804 * Now destroy the pool itself
2805 */
2806 pci_pool_destroy(instance->frame_dma_pool);
2807 pci_pool_destroy(instance->sense_dma_pool);
2808
2809 instance->frame_dma_pool = NULL;
2810 instance->sense_dma_pool = NULL;
2811 }
2812
2813 /**
2814 * megasas_create_frame_pool - Creates DMA pool for cmd frames
2815 * @instance: Adapter soft state
2816 *
2817 * Each command packet has an embedded DMA memory buffer that is used for
2818 * filling MFI frame and the SG list that immediately follows the frame. This
2819 * function creates those DMA memory buffers for each command packet by using
2820 * PCI pool facility.
2821 */
2822 static int megasas_create_frame_pool(struct megasas_instance *instance)
2823 {
2824 int i;
2825 u32 max_cmd;
2826 u32 sge_sz;
2827 u32 sgl_sz;
2828 u32 total_sz;
2829 u32 frame_count;
2830 struct megasas_cmd *cmd;
2831
2832 max_cmd = instance->max_mfi_cmds;
2833
2834 /*
2835 * Size of our frame is 64 bytes for MFI frame, followed by max SG
2836 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
2837 */
2838 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
2839 sizeof(struct megasas_sge32);
2840
2841 if (instance->flag_ieee) {
2842 sge_sz = sizeof(struct megasas_sge_skinny);
2843 }
2844
2845 /*
2846 * Calculated the number of 64byte frames required for SGL
2847 */
2848 sgl_sz = sge_sz * instance->max_num_sge;
2849 frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
2850 frame_count = 15;
2851
2852 /*
2853 * We need one extra frame for the MFI command
2854 */
2855 frame_count++;
2856
2857 total_sz = MEGAMFI_FRAME_SIZE * frame_count;
2858 /*
2859 * Use DMA pool facility provided by PCI layer
2860 */
2861 instance->frame_dma_pool = pci_pool_create("megasas frame pool",
2862 instance->pdev, total_sz, 64,
2863 0);
2864
2865 if (!instance->frame_dma_pool) {
2866 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
2867 return -ENOMEM;
2868 }
2869
2870 instance->sense_dma_pool = pci_pool_create("megasas sense pool",
2871 instance->pdev, 128, 4, 0);
2872
2873 if (!instance->sense_dma_pool) {
2874 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
2875
2876 pci_pool_destroy(instance->frame_dma_pool);
2877 instance->frame_dma_pool = NULL;
2878
2879 return -ENOMEM;
2880 }
2881
2882 /*
2883 * Allocate and attach a frame to each of the commands in cmd_list.
2884 * By making cmd->index as the context instead of the &cmd, we can
2885 * always use 32bit context regardless of the architecture
2886 */
2887 for (i = 0; i < max_cmd; i++) {
2888
2889 cmd = instance->cmd_list[i];
2890
2891 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
2892 GFP_KERNEL, &cmd->frame_phys_addr);
2893
2894 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
2895 GFP_KERNEL, &cmd->sense_phys_addr);
2896
2897 /*
2898 * megasas_teardown_frame_pool() takes care of freeing
2899 * whatever has been allocated
2900 */
2901 if (!cmd->frame || !cmd->sense) {
2902 printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
2903 megasas_teardown_frame_pool(instance);
2904 return -ENOMEM;
2905 }
2906
2907 memset(cmd->frame, 0, total_sz);
2908 cmd->frame->io.context = cmd->index;
2909 cmd->frame->io.pad_0 = 0;
2910 }
2911
2912 return 0;
2913 }
2914
2915 /**
2916 * megasas_free_cmds - Free all the cmds in the free cmd pool
2917 * @instance: Adapter soft state
2918 */
2919 void megasas_free_cmds(struct megasas_instance *instance)
2920 {
2921 int i;
2922 /* First free the MFI frame pool */
2923 megasas_teardown_frame_pool(instance);
2924
2925 /* Free all the commands in the cmd_list */
2926 for (i = 0; i < instance->max_mfi_cmds; i++)
2927
2928 kfree(instance->cmd_list[i]);
2929
2930 /* Free the cmd_list buffer itself */
2931 kfree(instance->cmd_list);
2932 instance->cmd_list = NULL;
2933
2934 INIT_LIST_HEAD(&instance->cmd_pool);
2935 }
2936
2937 /**
2938 * megasas_alloc_cmds - Allocates the command packets
2939 * @instance: Adapter soft state
2940 *
2941 * Each command that is issued to the FW, whether IO commands from the OS or
2942 * internal commands like IOCTLs, are wrapped in local data structure called
2943 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
2944 * the FW.
2945 *
2946 * Each frame has a 32-bit field called context (tag). This context is used
2947 * to get back the megasas_cmd from the frame when a frame gets completed in
2948 * the ISR. Typically the address of the megasas_cmd itself would be used as
2949 * the context. But we wanted to keep the differences between 32 and 64 bit
2950 * systems to the mininum. We always use 32 bit integers for the context. In
2951 * this driver, the 32 bit values are the indices into an array cmd_list.
2952 * This array is used only to look up the megasas_cmd given the context. The
2953 * free commands themselves are maintained in a linked list called cmd_pool.
2954 */
2955 int megasas_alloc_cmds(struct megasas_instance *instance)
2956 {
2957 int i;
2958 int j;
2959 u32 max_cmd;
2960 struct megasas_cmd *cmd;
2961
2962 max_cmd = instance->max_mfi_cmds;
2963
2964 /*
2965 * instance->cmd_list is an array of struct megasas_cmd pointers.
2966 * Allocate the dynamic array first and then allocate individual
2967 * commands.
2968 */
2969 instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL);
2970
2971 if (!instance->cmd_list) {
2972 printk(KERN_DEBUG "megasas: out of memory\n");
2973 return -ENOMEM;
2974 }
2975
2976 memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);
2977
2978 for (i = 0; i < max_cmd; i++) {
2979 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
2980 GFP_KERNEL);
2981
2982 if (!instance->cmd_list[i]) {
2983
2984 for (j = 0; j < i; j++)
2985 kfree(instance->cmd_list[j]);
2986
2987 kfree(instance->cmd_list);
2988 instance->cmd_list = NULL;
2989
2990 return -ENOMEM;
2991 }
2992 }
2993
2994 /*
2995 * Add all the commands to command pool (instance->cmd_pool)
2996 */
2997 for (i = 0; i < max_cmd; i++) {
2998 cmd = instance->cmd_list[i];
2999 memset(cmd, 0, sizeof(struct megasas_cmd));
3000 cmd->index = i;
3001 cmd->scmd = NULL;
3002 cmd->instance = instance;
3003
3004 list_add_tail(&cmd->list, &instance->cmd_pool);
3005 }
3006
3007 /*
3008 * Create a frame pool and assign one frame to each cmd
3009 */
3010 if (megasas_create_frame_pool(instance)) {
3011 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
3012 megasas_free_cmds(instance);
3013 }
3014
3015 return 0;
3016 }
3017
3018 /*
3019 * megasas_get_pd_list_info - Returns FW's pd_list structure
3020 * @instance: Adapter soft state
3021 * @pd_list: pd_list structure
3022 *
3023 * Issues an internal command (DCMD) to get the FW's controller PD
3024 * list structure. This information is mainly used to find out SYSTEM
3025 * supported by the FW.
3026 */
3027 static int
3028 megasas_get_pd_list(struct megasas_instance *instance)
3029 {
3030 int ret = 0, pd_index = 0;
3031 struct megasas_cmd *cmd;
3032 struct megasas_dcmd_frame *dcmd;
3033 struct MR_PD_LIST *ci;
3034 struct MR_PD_ADDRESS *pd_addr;
3035 dma_addr_t ci_h = 0;
3036
3037 cmd = megasas_get_cmd(instance);
3038
3039 if (!cmd) {
3040 printk(KERN_DEBUG "megasas (get_pd_list): Failed to get cmd\n");
3041 return -ENOMEM;
3042 }
3043
3044 dcmd = &cmd->frame->dcmd;
3045
3046 ci = pci_alloc_consistent(instance->pdev,
3047 MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST), &ci_h);
3048
3049 if (!ci) {
3050 printk(KERN_DEBUG "Failed to alloc mem for pd_list\n");
3051 megasas_return_cmd(instance, cmd);
3052 return -ENOMEM;
3053 }
3054
3055 memset(ci, 0, sizeof(*ci));
3056 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3057
3058 dcmd->mbox.b[0] = MR_PD_QUERY_TYPE_EXPOSED_TO_HOST;
3059 dcmd->mbox.b[1] = 0;
3060 dcmd->cmd = MFI_CMD_DCMD;
3061 dcmd->cmd_status = 0xFF;
3062 dcmd->sge_count = 1;
3063 dcmd->flags = MFI_FRAME_DIR_READ;
3064 dcmd->timeout = 0;
3065 dcmd->pad_0 = 0;
3066 dcmd->data_xfer_len = MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST);
3067 dcmd->opcode = MR_DCMD_PD_LIST_QUERY;
3068 dcmd->sgl.sge32[0].phys_addr = ci_h;
3069 dcmd->sgl.sge32[0].length = MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST);
3070
3071 if (!megasas_issue_polled(instance, cmd)) {
3072 ret = 0;
3073 } else {
3074 ret = -1;
3075 }
3076
3077 /*
3078 * the following function will get the instance PD LIST.
3079 */
3080
3081 pd_addr = ci->addr;
3082
3083 if ( ret == 0 &&
3084 (ci->count <
3085 (MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL))) {
3086
3087 memset(instance->pd_list, 0,
3088 MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));
3089
3090 for (pd_index = 0; pd_index < ci->count; pd_index++) {
3091
3092 instance->pd_list[pd_addr->deviceId].tid =
3093 pd_addr->deviceId;
3094 instance->pd_list[pd_addr->deviceId].driveType =
3095 pd_addr->scsiDevType;
3096 instance->pd_list[pd_addr->deviceId].driveState =
3097 MR_PD_STATE_SYSTEM;
3098 pd_addr++;
3099 }
3100 }
3101
3102 pci_free_consistent(instance->pdev,
3103 MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
3104 ci, ci_h);
3105 megasas_return_cmd(instance, cmd);
3106
3107 return ret;
3108 }
3109
3110 /*
3111 * megasas_get_ld_list_info - Returns FW's ld_list structure
3112 * @instance: Adapter soft state
3113 * @ld_list: ld_list structure
3114 *
3115 * Issues an internal command (DCMD) to get the FW's controller PD
3116 * list structure. This information is mainly used to find out SYSTEM
3117 * supported by the FW.
3118 */
3119 static int
3120 megasas_get_ld_list(struct megasas_instance *instance)
3121 {
3122 int ret = 0, ld_index = 0, ids = 0;
3123 struct megasas_cmd *cmd;
3124 struct megasas_dcmd_frame *dcmd;
3125 struct MR_LD_LIST *ci;
3126 dma_addr_t ci_h = 0;
3127
3128 cmd = megasas_get_cmd(instance);
3129
3130 if (!cmd) {
3131 printk(KERN_DEBUG "megasas_get_ld_list: Failed to get cmd\n");
3132 return -ENOMEM;
3133 }
3134
3135 dcmd = &cmd->frame->dcmd;
3136
3137 ci = pci_alloc_consistent(instance->pdev,
3138 sizeof(struct MR_LD_LIST),
3139 &ci_h);
3140
3141 if (!ci) {
3142 printk(KERN_DEBUG "Failed to alloc mem in get_ld_list\n");
3143 megasas_return_cmd(instance, cmd);
3144 return -ENOMEM;
3145 }
3146
3147 memset(ci, 0, sizeof(*ci));
3148 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3149
3150 dcmd->cmd = MFI_CMD_DCMD;
3151 dcmd->cmd_status = 0xFF;
3152 dcmd->sge_count = 1;
3153 dcmd->flags = MFI_FRAME_DIR_READ;
3154 dcmd->timeout = 0;
3155 dcmd->data_xfer_len = sizeof(struct MR_LD_LIST);
3156 dcmd->opcode = MR_DCMD_LD_GET_LIST;
3157 dcmd->sgl.sge32[0].phys_addr = ci_h;
3158 dcmd->sgl.sge32[0].length = sizeof(struct MR_LD_LIST);
3159 dcmd->pad_0 = 0;
3160
3161 if (!megasas_issue_polled(instance, cmd)) {
3162 ret = 0;
3163 } else {
3164 ret = -1;
3165 }
3166
3167 /* the following function will get the instance PD LIST */
3168
3169 if ((ret == 0) && (ci->ldCount <= MAX_LOGICAL_DRIVES)) {
3170 memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
3171
3172 for (ld_index = 0; ld_index < ci->ldCount; ld_index++) {
3173 if (ci->ldList[ld_index].state != 0) {
3174 ids = ci->ldList[ld_index].ref.targetId;
3175 instance->ld_ids[ids] =
3176 ci->ldList[ld_index].ref.targetId;
3177 }
3178 }
3179 }
3180
3181 pci_free_consistent(instance->pdev,
3182 sizeof(struct MR_LD_LIST),
3183 ci,
3184 ci_h);
3185
3186 megasas_return_cmd(instance, cmd);
3187 return ret;
3188 }
3189
3190 /**
3191 * megasas_get_controller_info - Returns FW's controller structure
3192 * @instance: Adapter soft state
3193 * @ctrl_info: Controller information structure
3194 *
3195 * Issues an internal command (DCMD) to get the FW's controller structure.
3196 * This information is mainly used to find out the maximum IO transfer per
3197 * command supported by the FW.
3198 */
3199 static int
3200 megasas_get_ctrl_info(struct megasas_instance *instance,
3201 struct megasas_ctrl_info *ctrl_info)
3202 {
3203 int ret = 0;
3204 struct megasas_cmd *cmd;
3205 struct megasas_dcmd_frame *dcmd;
3206 struct megasas_ctrl_info *ci;
3207 dma_addr_t ci_h = 0;
3208
3209 cmd = megasas_get_cmd(instance);
3210
3211 if (!cmd) {
3212 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
3213 return -ENOMEM;
3214 }
3215
3216 dcmd = &cmd->frame->dcmd;
3217
3218 ci = pci_alloc_consistent(instance->pdev,
3219 sizeof(struct megasas_ctrl_info), &ci_h);
3220
3221 if (!ci) {
3222 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
3223 megasas_return_cmd(instance, cmd);
3224 return -ENOMEM;
3225 }
3226
3227 memset(ci, 0, sizeof(*ci));
3228 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3229
3230 dcmd->cmd = MFI_CMD_DCMD;
3231 dcmd->cmd_status = 0xFF;
3232 dcmd->sge_count = 1;
3233 dcmd->flags = MFI_FRAME_DIR_READ;
3234 dcmd->timeout = 0;
3235 dcmd->pad_0 = 0;
3236 dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
3237 dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
3238 dcmd->sgl.sge32[0].phys_addr = ci_h;
3239 dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
3240
3241 if (!megasas_issue_polled(instance, cmd)) {
3242 ret = 0;
3243 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
3244 } else {
3245 ret = -1;
3246 }
3247
3248 pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
3249 ci, ci_h);
3250
3251 megasas_return_cmd(instance, cmd);
3252 return ret;
3253 }
3254
3255 /**
3256 * megasas_issue_init_mfi - Initializes the FW
3257 * @instance: Adapter soft state
3258 *
3259 * Issues the INIT MFI cmd
3260 */
3261 static int
3262 megasas_issue_init_mfi(struct megasas_instance *instance)
3263 {
3264 u32 context;
3265
3266 struct megasas_cmd *cmd;
3267
3268 struct megasas_init_frame *init_frame;
3269 struct megasas_init_queue_info *initq_info;
3270 dma_addr_t init_frame_h;
3271 dma_addr_t initq_info_h;
3272
3273 /*
3274 * Prepare a init frame. Note the init frame points to queue info
3275 * structure. Each frame has SGL allocated after first 64 bytes. For
3276 * this frame - since we don't need any SGL - we use SGL's space as
3277 * queue info structure
3278 *
3279 * We will not get a NULL command below. We just created the pool.
3280 */
3281 cmd = megasas_get_cmd(instance);
3282
3283 init_frame = (struct megasas_init_frame *)cmd->frame;
3284 initq_info = (struct megasas_init_queue_info *)
3285 ((unsigned long)init_frame + 64);
3286
3287 init_frame_h = cmd->frame_phys_addr;
3288 initq_info_h = init_frame_h + 64;
3289
3290 context = init_frame->context;
3291 memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
3292 memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
3293 init_frame->context = context;
3294
3295 initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
3296 initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
3297
3298 initq_info->producer_index_phys_addr_lo = instance->producer_h;
3299 initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
3300
3301 init_frame->cmd = MFI_CMD_INIT;
3302 init_frame->cmd_status = 0xFF;
3303 init_frame->queue_info_new_phys_addr_lo = initq_info_h;
3304
3305 init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
3306
3307 /*
3308 * disable the intr before firing the init frame to FW
3309 */
3310 instance->instancet->disable_intr(instance->reg_set);
3311
3312 /*
3313 * Issue the init frame in polled mode
3314 */
3315
3316 if (megasas_issue_polled(instance, cmd)) {
3317 printk(KERN_ERR "megasas: Failed to init firmware\n");
3318 megasas_return_cmd(instance, cmd);
3319 goto fail_fw_init;
3320 }
3321
3322 megasas_return_cmd(instance, cmd);
3323
3324 return 0;
3325
3326 fail_fw_init:
3327 return -EINVAL;
3328 }
3329
3330 /**
3331 * megasas_start_timer - Initializes a timer object
3332 * @instance: Adapter soft state
3333 * @timer: timer object to be initialized
3334 * @fn: timer function
3335 * @interval: time interval between timer function call
3336 */
3337 static inline void
3338 megasas_start_timer(struct megasas_instance *instance,
3339 struct timer_list *timer,
3340 void *fn, unsigned long interval)
3341 {
3342 init_timer(timer);
3343 timer->expires = jiffies + interval;
3344 timer->data = (unsigned long)instance;
3345 timer->function = fn;
3346 add_timer(timer);
3347 }
3348
3349 /**
3350 * megasas_io_completion_timer - Timer fn
3351 * @instance_addr: Address of adapter soft state
3352 *
3353 * Schedules tasklet for cmd completion
3354 * if poll_mode_io is set
3355 */
3356 static void
3357 megasas_io_completion_timer(unsigned long instance_addr)
3358 {
3359 struct megasas_instance *instance =
3360 (struct megasas_instance *)instance_addr;
3361
3362 if (atomic_read(&instance->fw_outstanding))
3363 tasklet_schedule(&instance->isr_tasklet);
3364
3365 /* Restart timer */
3366 if (poll_mode_io)
3367 mod_timer(&instance->io_completion_timer,
3368 jiffies + MEGASAS_COMPLETION_TIMER_INTERVAL);
3369 }
3370
3371 static u32
3372 megasas_init_adapter_mfi(struct megasas_instance *instance)
3373 {
3374 struct megasas_register_set __iomem *reg_set;
3375 u32 context_sz;
3376 u32 reply_q_sz;
3377
3378 reg_set = instance->reg_set;
3379
3380 /*
3381 * Get various operational parameters from status register
3382 */
3383 instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
3384 /*
3385 * Reduce the max supported cmds by 1. This is to ensure that the
3386 * reply_q_sz (1 more than the max cmd that driver may send)
3387 * does not exceed max cmds that the FW can support
3388 */
3389 instance->max_fw_cmds = instance->max_fw_cmds-1;
3390 instance->max_mfi_cmds = instance->max_fw_cmds;
3391 instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
3392 0x10;
3393 /*
3394 * Create a pool of commands
3395 */
3396 if (megasas_alloc_cmds(instance))
3397 goto fail_alloc_cmds;
3398
3399 /*
3400 * Allocate memory for reply queue. Length of reply queue should
3401 * be _one_ more than the maximum commands handled by the firmware.
3402 *
3403 * Note: When FW completes commands, it places corresponding contex
3404 * values in this circular reply queue. This circular queue is a fairly
3405 * typical producer-consumer queue. FW is the producer (of completed
3406 * commands) and the driver is the consumer.
3407 */
3408 context_sz = sizeof(u32);
3409 reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
3410
3411 instance->reply_queue = pci_alloc_consistent(instance->pdev,
3412 reply_q_sz,
3413 &instance->reply_queue_h);
3414
3415 if (!instance->reply_queue) {
3416 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
3417 goto fail_reply_queue;
3418 }
3419
3420 if (megasas_issue_init_mfi(instance))
3421 goto fail_fw_init;
3422
3423 instance->fw_support_ieee = 0;
3424 instance->fw_support_ieee =
3425 (instance->instancet->read_fw_status_reg(reg_set) &
3426 0x04000000);
3427
3428 printk(KERN_NOTICE "megasas_init_mfi: fw_support_ieee=%d",
3429 instance->fw_support_ieee);
3430
3431 if (instance->fw_support_ieee)
3432 instance->flag_ieee = 1;
3433
3434 return 0;
3435
3436 fail_fw_init:
3437
3438 pci_free_consistent(instance->pdev, reply_q_sz,
3439 instance->reply_queue, instance->reply_queue_h);
3440 fail_reply_queue:
3441 megasas_free_cmds(instance);
3442
3443 fail_alloc_cmds:
3444 return 1;
3445 }
3446
3447 /**
3448 * megasas_init_fw - Initializes the FW
3449 * @instance: Adapter soft state
3450 *
3451 * This is the main function for initializing firmware
3452 */
3453
3454 static int megasas_init_fw(struct megasas_instance *instance)
3455 {
3456 u32 max_sectors_1;
3457 u32 max_sectors_2;
3458 u32 tmp_sectors;
3459 struct megasas_register_set __iomem *reg_set;
3460 struct megasas_ctrl_info *ctrl_info;
3461 unsigned long bar_list;
3462
3463 /* Find first memory bar */
3464 bar_list = pci_select_bars(instance->pdev, IORESOURCE_MEM);
3465 instance->bar = find_first_bit(&bar_list, sizeof(unsigned long));
3466 instance->base_addr = pci_resource_start(instance->pdev, instance->bar);
3467 if (pci_request_selected_regions(instance->pdev, instance->bar,
3468 "megasas: LSI")) {
3469 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
3470 return -EBUSY;
3471 }
3472
3473 instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
3474
3475 if (!instance->reg_set) {
3476 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
3477 goto fail_ioremap;
3478 }
3479
3480 reg_set = instance->reg_set;
3481
3482 switch (instance->pdev->device) {
3483 case PCI_DEVICE_ID_LSI_FUSION:
3484 instance->instancet = &megasas_instance_template_fusion;
3485 break;
3486 case PCI_DEVICE_ID_LSI_SAS1078R:
3487 case PCI_DEVICE_ID_LSI_SAS1078DE:
3488 instance->instancet = &megasas_instance_template_ppc;
3489 break;
3490 case PCI_DEVICE_ID_LSI_SAS1078GEN2:
3491 case PCI_DEVICE_ID_LSI_SAS0079GEN2:
3492 instance->instancet = &megasas_instance_template_gen2;
3493 break;
3494 case PCI_DEVICE_ID_LSI_SAS0073SKINNY:
3495 case PCI_DEVICE_ID_LSI_SAS0071SKINNY:
3496 instance->instancet = &megasas_instance_template_skinny;
3497 break;
3498 case PCI_DEVICE_ID_LSI_SAS1064R:
3499 case PCI_DEVICE_ID_DELL_PERC5:
3500 default:
3501 instance->instancet = &megasas_instance_template_xscale;
3502 break;
3503 }
3504
3505 /*
3506 * We expect the FW state to be READY
3507 */
3508 if (megasas_transition_to_ready(instance))
3509 goto fail_ready_state;
3510
3511 /* Get operational params, sge flags, send init cmd to controller */
3512 if (instance->instancet->init_adapter(instance))
3513 goto fail_init_adapter;
3514
3515 printk(KERN_ERR "megasas: INIT adapter done\n");
3516
3517 /** for passthrough
3518 * the following function will get the PD LIST.
3519 */
3520
3521 memset(instance->pd_list, 0 ,
3522 (MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)));
3523 megasas_get_pd_list(instance);
3524
3525 memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
3526 megasas_get_ld_list(instance);
3527
3528 ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
3529
3530 /*
3531 * Compute the max allowed sectors per IO: The controller info has two
3532 * limits on max sectors. Driver should use the minimum of these two.
3533 *
3534 * 1 << stripe_sz_ops.min = max sectors per strip
3535 *
3536 * Note that older firmwares ( < FW ver 30) didn't report information
3537 * to calculate max_sectors_1. So the number ended up as zero always.
3538 */
3539 tmp_sectors = 0;
3540 if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
3541
3542 max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
3543 ctrl_info->max_strips_per_io;
3544 max_sectors_2 = ctrl_info->max_request_size;
3545
3546 tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2);
3547 instance->disableOnlineCtrlReset =
3548 ctrl_info->properties.OnOffProperties.disableOnlineCtrlReset;
3549 }
3550
3551 instance->max_sectors_per_req = instance->max_num_sge *
3552 PAGE_SIZE / 512;
3553 if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
3554 instance->max_sectors_per_req = tmp_sectors;
3555
3556 kfree(ctrl_info);
3557
3558 /*
3559 * Setup tasklet for cmd completion
3560 */
3561
3562 tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
3563 (unsigned long)instance);
3564
3565 /* Initialize the cmd completion timer */
3566 if (poll_mode_io)
3567 megasas_start_timer(instance, &instance->io_completion_timer,
3568 megasas_io_completion_timer,
3569 MEGASAS_COMPLETION_TIMER_INTERVAL);
3570 return 0;
3571
3572 fail_init_adapter:
3573 fail_ready_state:
3574 iounmap(instance->reg_set);
3575
3576 fail_ioremap:
3577 pci_release_selected_regions(instance->pdev, instance->bar);
3578
3579 return -EINVAL;
3580 }
3581
3582 /**
3583 * megasas_release_mfi - Reverses the FW initialization
3584 * @intance: Adapter soft state
3585 */
3586 static void megasas_release_mfi(struct megasas_instance *instance)
3587 {
3588 u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);
3589
3590 if (instance->reply_queue)
3591 pci_free_consistent(instance->pdev, reply_q_sz,
3592 instance->reply_queue, instance->reply_queue_h);
3593
3594 megasas_free_cmds(instance);
3595
3596 iounmap(instance->reg_set);
3597
3598 pci_release_selected_regions(instance->pdev, instance->bar);
3599 }
3600
3601 /**
3602 * megasas_get_seq_num - Gets latest event sequence numbers
3603 * @instance: Adapter soft state
3604 * @eli: FW event log sequence numbers information
3605 *
3606 * FW maintains a log of all events in a non-volatile area. Upper layers would
3607 * usually find out the latest sequence number of the events, the seq number at
3608 * the boot etc. They would "read" all the events below the latest seq number
3609 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
3610 * number), they would subsribe to AEN (asynchronous event notification) and
3611 * wait for the events to happen.
3612 */
3613 static int
3614 megasas_get_seq_num(struct megasas_instance *instance,
3615 struct megasas_evt_log_info *eli)
3616 {
3617 struct megasas_cmd *cmd;
3618 struct megasas_dcmd_frame *dcmd;
3619 struct megasas_evt_log_info *el_info;
3620 dma_addr_t el_info_h = 0;
3621
3622 cmd = megasas_get_cmd(instance);
3623
3624 if (!cmd) {
3625 return -ENOMEM;
3626 }
3627
3628 dcmd = &cmd->frame->dcmd;
3629 el_info = pci_alloc_consistent(instance->pdev,
3630 sizeof(struct megasas_evt_log_info),
3631 &el_info_h);
3632
3633 if (!el_info) {
3634 megasas_return_cmd(instance, cmd);
3635 return -ENOMEM;
3636 }
3637
3638 memset(el_info, 0, sizeof(*el_info));
3639 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3640
3641 dcmd->cmd = MFI_CMD_DCMD;
3642 dcmd->cmd_status = 0x0;
3643 dcmd->sge_count = 1;
3644 dcmd->flags = MFI_FRAME_DIR_READ;
3645 dcmd->timeout = 0;
3646 dcmd->pad_0 = 0;
3647 dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
3648 dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
3649 dcmd->sgl.sge32[0].phys_addr = el_info_h;
3650 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
3651
3652 megasas_issue_blocked_cmd(instance, cmd);
3653
3654 /*
3655 * Copy the data back into callers buffer
3656 */
3657 memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
3658
3659 pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
3660 el_info, el_info_h);
3661
3662 megasas_return_cmd(instance, cmd);
3663
3664 return 0;
3665 }
3666
3667 /**
3668 * megasas_register_aen - Registers for asynchronous event notification
3669 * @instance: Adapter soft state
3670 * @seq_num: The starting sequence number
3671 * @class_locale: Class of the event
3672 *
3673 * This function subscribes for AEN for events beyond the @seq_num. It requests
3674 * to be notified if and only if the event is of type @class_locale
3675 */
3676 static int
3677 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
3678 u32 class_locale_word)
3679 {
3680 int ret_val;
3681 struct megasas_cmd *cmd;
3682 struct megasas_dcmd_frame *dcmd;
3683 union megasas_evt_class_locale curr_aen;
3684 union megasas_evt_class_locale prev_aen;
3685
3686 /*
3687 * If there an AEN pending already (aen_cmd), check if the
3688 * class_locale of that pending AEN is inclusive of the new
3689 * AEN request we currently have. If it is, then we don't have
3690 * to do anything. In other words, whichever events the current
3691 * AEN request is subscribing to, have already been subscribed
3692 * to.
3693 *
3694 * If the old_cmd is _not_ inclusive, then we have to abort
3695 * that command, form a class_locale that is superset of both
3696 * old and current and re-issue to the FW
3697 */
3698
3699 curr_aen.word = class_locale_word;
3700
3701 if (instance->aen_cmd) {
3702
3703 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
3704
3705 /*
3706 * A class whose enum value is smaller is inclusive of all
3707 * higher values. If a PROGRESS (= -1) was previously
3708 * registered, then a new registration requests for higher
3709 * classes need not be sent to FW. They are automatically
3710 * included.
3711 *
3712 * Locale numbers don't have such hierarchy. They are bitmap
3713 * values
3714 */
3715 if ((prev_aen.members.class <= curr_aen.members.class) &&
3716 !((prev_aen.members.locale & curr_aen.members.locale) ^
3717 curr_aen.members.locale)) {
3718 /*
3719 * Previously issued event registration includes
3720 * current request. Nothing to do.
3721 */
3722 return 0;
3723 } else {
3724 curr_aen.members.locale |= prev_aen.members.locale;
3725
3726 if (prev_aen.members.class < curr_aen.members.class)
3727 curr_aen.members.class = prev_aen.members.class;
3728
3729 instance->aen_cmd->abort_aen = 1;
3730 ret_val = megasas_issue_blocked_abort_cmd(instance,
3731 instance->
3732 aen_cmd);
3733
3734 if (ret_val) {
3735 printk(KERN_DEBUG "megasas: Failed to abort "
3736 "previous AEN command\n");
3737 return ret_val;
3738 }
3739 }
3740 }
3741
3742 cmd = megasas_get_cmd(instance);
3743
3744 if (!cmd)
3745 return -ENOMEM;
3746
3747 dcmd = &cmd->frame->dcmd;
3748
3749 memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
3750
3751 /*
3752 * Prepare DCMD for aen registration
3753 */
3754 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3755
3756 dcmd->cmd = MFI_CMD_DCMD;
3757 dcmd->cmd_status = 0x0;
3758 dcmd->sge_count = 1;
3759 dcmd->flags = MFI_FRAME_DIR_READ;
3760 dcmd->timeout = 0;
3761 dcmd->pad_0 = 0;
3762 instance->last_seq_num = seq_num;
3763 dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
3764 dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
3765 dcmd->mbox.w[0] = seq_num;
3766 dcmd->mbox.w[1] = curr_aen.word;
3767 dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
3768 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
3769
3770 if (instance->aen_cmd != NULL) {
3771 megasas_return_cmd(instance, cmd);
3772 return 0;
3773 }
3774
3775 /*
3776 * Store reference to the cmd used to register for AEN. When an
3777 * application wants us to register for AEN, we have to abort this
3778 * cmd and re-register with a new EVENT LOCALE supplied by that app
3779 */
3780 instance->aen_cmd = cmd;
3781
3782 /*
3783 * Issue the aen registration frame
3784 */
3785 instance->instancet->issue_dcmd(instance, cmd);
3786
3787 return 0;
3788 }
3789
3790 /**
3791 * megasas_start_aen - Subscribes to AEN during driver load time
3792 * @instance: Adapter soft state
3793 */
3794 static int megasas_start_aen(struct megasas_instance *instance)
3795 {
3796 struct megasas_evt_log_info eli;
3797 union megasas_evt_class_locale class_locale;
3798
3799 /*
3800 * Get the latest sequence number from FW
3801 */
3802 memset(&eli, 0, sizeof(eli));
3803
3804 if (megasas_get_seq_num(instance, &eli))
3805 return -1;
3806
3807 /*
3808 * Register AEN with FW for latest sequence number plus 1
3809 */
3810 class_locale.members.reserved = 0;
3811 class_locale.members.locale = MR_EVT_LOCALE_ALL;
3812 class_locale.members.class = MR_EVT_CLASS_DEBUG;
3813
3814 return megasas_register_aen(instance, eli.newest_seq_num + 1,
3815 class_locale.word);
3816 }
3817
3818 /**
3819 * megasas_io_attach - Attaches this driver to SCSI mid-layer
3820 * @instance: Adapter soft state
3821 */
3822 static int megasas_io_attach(struct megasas_instance *instance)
3823 {
3824 struct Scsi_Host *host = instance->host;
3825
3826 /*
3827 * Export parameters required by SCSI mid-layer
3828 */
3829 host->irq = instance->pdev->irq;
3830 host->unique_id = instance->unique_id;
3831 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3832 (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
3833 host->can_queue =
3834 instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
3835 } else
3836 host->can_queue =
3837 instance->max_fw_cmds - MEGASAS_INT_CMDS;
3838 host->this_id = instance->init_id;
3839 host->sg_tablesize = instance->max_num_sge;
3840
3841 if (instance->fw_support_ieee)
3842 instance->max_sectors_per_req = MEGASAS_MAX_SECTORS_IEEE;
3843
3844 /*
3845 * Check if the module parameter value for max_sectors can be used
3846 */
3847 if (max_sectors && max_sectors < instance->max_sectors_per_req)
3848 instance->max_sectors_per_req = max_sectors;
3849 else {
3850 if (max_sectors) {
3851 if (((instance->pdev->device ==
3852 PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
3853 (instance->pdev->device ==
3854 PCI_DEVICE_ID_LSI_SAS0079GEN2)) &&
3855 (max_sectors <= MEGASAS_MAX_SECTORS)) {
3856 instance->max_sectors_per_req = max_sectors;
3857 } else {
3858 printk(KERN_INFO "megasas: max_sectors should be > 0"
3859 "and <= %d (or < 1MB for GEN2 controller)\n",
3860 instance->max_sectors_per_req);
3861 }
3862 }
3863 }
3864
3865 host->max_sectors = instance->max_sectors_per_req;
3866 host->cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
3867 host->max_channel = MEGASAS_MAX_CHANNELS - 1;
3868 host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
3869 host->max_lun = MEGASAS_MAX_LUN;
3870 host->max_cmd_len = 16;
3871
3872 /* Fusion only supports host reset */
3873 if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) {
3874 host->hostt->eh_device_reset_handler = NULL;
3875 host->hostt->eh_bus_reset_handler = NULL;
3876 }
3877
3878 /*
3879 * Notify the mid-layer about the new controller
3880 */
3881 if (scsi_add_host(host, &instance->pdev->dev)) {
3882 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
3883 return -ENODEV;
3884 }
3885
3886 /*
3887 * Trigger SCSI to scan our drives
3888 */
3889 scsi_scan_host(host);
3890 return 0;
3891 }
3892
3893 static int
3894 megasas_set_dma_mask(struct pci_dev *pdev)
3895 {
3896 /*
3897 * All our contollers are capable of performing 64-bit DMA
3898 */
3899 if (IS_DMA64) {
3900 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
3901
3902 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
3903 goto fail_set_dma_mask;
3904 }
3905 } else {
3906 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
3907 goto fail_set_dma_mask;
3908 }
3909 return 0;
3910
3911 fail_set_dma_mask:
3912 return 1;
3913 }
3914
3915 /**
3916 * megasas_probe_one - PCI hotplug entry point
3917 * @pdev: PCI device structure
3918 * @id: PCI ids of supported hotplugged adapter
3919 */
3920 static int __devinit
3921 megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
3922 {
3923 int rval, pos;
3924 struct Scsi_Host *host;
3925 struct megasas_instance *instance;
3926 u16 control = 0;
3927
3928 /* Reset MSI-X in the kdump kernel */
3929 if (reset_devices) {
3930 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3931 if (pos) {
3932 pci_read_config_word(pdev, msi_control_reg(pos),
3933 &control);
3934 if (control & PCI_MSIX_FLAGS_ENABLE) {
3935 dev_info(&pdev->dev, "resetting MSI-X\n");
3936 pci_write_config_word(pdev,
3937 msi_control_reg(pos),
3938 control &
3939 ~PCI_MSIX_FLAGS_ENABLE);
3940 }
3941 }
3942 }
3943
3944 /*
3945 * Announce PCI information
3946 */
3947 printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
3948 pdev->vendor, pdev->device, pdev->subsystem_vendor,
3949 pdev->subsystem_device);
3950
3951 printk("bus %d:slot %d:func %d\n",
3952 pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
3953
3954 /*
3955 * PCI prepping: enable device set bus mastering and dma mask
3956 */
3957 rval = pci_enable_device_mem(pdev);
3958
3959 if (rval) {
3960 return rval;
3961 }
3962
3963 pci_set_master(pdev);
3964
3965 if (megasas_set_dma_mask(pdev))
3966 goto fail_set_dma_mask;
3967
3968 host = scsi_host_alloc(&megasas_template,
3969 sizeof(struct megasas_instance));
3970
3971 if (!host) {
3972 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
3973 goto fail_alloc_instance;
3974 }
3975
3976 instance = (struct megasas_instance *)host->hostdata;
3977 memset(instance, 0, sizeof(*instance));
3978 atomic_set( &instance->fw_reset_no_pci_access, 0 );
3979 instance->pdev = pdev;
3980
3981 switch (instance->pdev->device) {
3982 case PCI_DEVICE_ID_LSI_FUSION:
3983 {
3984 struct fusion_context *fusion;
3985
3986 instance->ctrl_context =
3987 kzalloc(sizeof(struct fusion_context), GFP_KERNEL);
3988 if (!instance->ctrl_context) {
3989 printk(KERN_DEBUG "megasas: Failed to allocate "
3990 "memory for Fusion context info\n");
3991 goto fail_alloc_dma_buf;
3992 }
3993 fusion = instance->ctrl_context;
3994 INIT_LIST_HEAD(&fusion->cmd_pool);
3995 spin_lock_init(&fusion->cmd_pool_lock);
3996 }
3997 break;
3998 default: /* For all other supported controllers */
3999
4000 instance->producer =
4001 pci_alloc_consistent(pdev, sizeof(u32),
4002 &instance->producer_h);
4003 instance->consumer =
4004 pci_alloc_consistent(pdev, sizeof(u32),
4005 &instance->consumer_h);
4006
4007 if (!instance->producer || !instance->consumer) {
4008 printk(KERN_DEBUG "megasas: Failed to allocate"
4009 "memory for producer, consumer\n");
4010 goto fail_alloc_dma_buf;
4011 }
4012
4013 *instance->producer = 0;
4014 *instance->consumer = 0;
4015 break;
4016 }
4017
4018 megasas_poll_wait_aen = 0;
4019 instance->flag_ieee = 0;
4020 instance->ev = NULL;
4021 instance->issuepend_done = 1;
4022 instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
4023 megasas_poll_wait_aen = 0;
4024
4025 instance->evt_detail = pci_alloc_consistent(pdev,
4026 sizeof(struct
4027 megasas_evt_detail),
4028 &instance->evt_detail_h);
4029
4030 if (!instance->evt_detail) {
4031 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
4032 "event detail structure\n");
4033 goto fail_alloc_dma_buf;
4034 }
4035
4036 /*
4037 * Initialize locks and queues
4038 */
4039 INIT_LIST_HEAD(&instance->cmd_pool);
4040 INIT_LIST_HEAD(&instance->internal_reset_pending_q);
4041
4042 atomic_set(&instance->fw_outstanding,0);
4043
4044 init_waitqueue_head(&instance->int_cmd_wait_q);
4045 init_waitqueue_head(&instance->abort_cmd_wait_q);
4046
4047 spin_lock_init(&instance->cmd_pool_lock);
4048 spin_lock_init(&instance->hba_lock);
4049 spin_lock_init(&instance->completion_lock);
4050 spin_lock_init(&poll_aen_lock);
4051
4052 mutex_init(&instance->aen_mutex);
4053 mutex_init(&instance->reset_mutex);
4054
4055 /*
4056 * Initialize PCI related and misc parameters
4057 */
4058 instance->host = host;
4059 instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
4060 instance->init_id = MEGASAS_DEFAULT_INIT_ID;
4061
4062 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
4063 (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
4064 instance->flag_ieee = 1;
4065 sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
4066 } else
4067 sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
4068
4069 megasas_dbg_lvl = 0;
4070 instance->flag = 0;
4071 instance->unload = 1;
4072 instance->last_time = 0;
4073 instance->disableOnlineCtrlReset = 1;
4074
4075 if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)
4076 INIT_WORK(&instance->work_init, megasas_fusion_ocr_wq);
4077 else
4078 INIT_WORK(&instance->work_init, process_fw_state_change_wq);
4079
4080 /* Try to enable MSI-X */
4081 if ((instance->pdev->device != PCI_DEVICE_ID_LSI_SAS1078R) &&
4082 (instance->pdev->device != PCI_DEVICE_ID_LSI_SAS1078DE) &&
4083 (instance->pdev->device != PCI_DEVICE_ID_LSI_VERDE_ZCR) &&
4084 !msix_disable && !pci_enable_msix(instance->pdev,
4085 &instance->msixentry, 1))
4086 instance->msi_flag = 1;
4087
4088 /*
4089 * Initialize MFI Firmware
4090 */
4091 if (megasas_init_fw(instance))
4092 goto fail_init_mfi;
4093
4094 /*
4095 * Register IRQ
4096 */
4097 if (request_irq(instance->msi_flag ? instance->msixentry.vector :
4098 pdev->irq, instance->instancet->service_isr,
4099 IRQF_SHARED, "megasas", instance)) {
4100 printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
4101 goto fail_irq;
4102 }
4103
4104 instance->instancet->enable_intr(instance->reg_set);
4105
4106 /*
4107 * Store instance in PCI softstate
4108 */
4109 pci_set_drvdata(pdev, instance);
4110
4111 /*
4112 * Add this controller to megasas_mgmt_info structure so that it
4113 * can be exported to management applications
4114 */
4115 megasas_mgmt_info.count++;
4116 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
4117 megasas_mgmt_info.max_index++;
4118
4119 /*
4120 * Initiate AEN (Asynchronous Event Notification)
4121 */
4122 if (megasas_start_aen(instance)) {
4123 printk(KERN_DEBUG "megasas: start aen failed\n");
4124 goto fail_start_aen;
4125 }
4126
4127 /*
4128 * Register with SCSI mid-layer
4129 */
4130 if (megasas_io_attach(instance))
4131 goto fail_io_attach;
4132
4133 instance->unload = 0;
4134 return 0;
4135
4136 fail_start_aen:
4137 fail_io_attach:
4138 megasas_mgmt_info.count--;
4139 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
4140 megasas_mgmt_info.max_index--;
4141
4142 pci_set_drvdata(pdev, NULL);
4143 instance->instancet->disable_intr(instance->reg_set);
4144 free_irq(instance->msi_flag ? instance->msixentry.vector :
4145 instance->pdev->irq, instance);
4146 fail_irq:
4147 if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)
4148 megasas_release_fusion(instance);
4149 else
4150 megasas_release_mfi(instance);
4151 fail_init_mfi:
4152 if (instance->msi_flag)
4153 pci_disable_msix(instance->pdev);
4154 fail_alloc_dma_buf:
4155 if (instance->evt_detail)
4156 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
4157 instance->evt_detail,
4158 instance->evt_detail_h);
4159
4160 if (instance->producer)
4161 pci_free_consistent(pdev, sizeof(u32), instance->producer,
4162 instance->producer_h);
4163 if (instance->consumer)
4164 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
4165 instance->consumer_h);
4166 scsi_host_put(host);
4167
4168 fail_alloc_instance:
4169 fail_set_dma_mask:
4170 pci_disable_device(pdev);
4171
4172 return -ENODEV;
4173 }
4174
4175 /**
4176 * megasas_flush_cache - Requests FW to flush all its caches
4177 * @instance: Adapter soft state
4178 */
4179 static void megasas_flush_cache(struct megasas_instance *instance)
4180 {
4181 struct megasas_cmd *cmd;
4182 struct megasas_dcmd_frame *dcmd;
4183
4184 if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
4185 return;
4186
4187 cmd = megasas_get_cmd(instance);
4188
4189 if (!cmd)
4190 return;
4191
4192 dcmd = &cmd->frame->dcmd;
4193
4194 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4195
4196 dcmd->cmd = MFI_CMD_DCMD;
4197 dcmd->cmd_status = 0x0;
4198 dcmd->sge_count = 0;
4199 dcmd->flags = MFI_FRAME_DIR_NONE;
4200 dcmd->timeout = 0;
4201 dcmd->pad_0 = 0;
4202 dcmd->data_xfer_len = 0;
4203 dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
4204 dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
4205
4206 megasas_issue_blocked_cmd(instance, cmd);
4207
4208 megasas_return_cmd(instance, cmd);
4209
4210 return;
4211 }
4212
4213 /**
4214 * megasas_shutdown_controller - Instructs FW to shutdown the controller
4215 * @instance: Adapter soft state
4216 * @opcode: Shutdown/Hibernate
4217 */
4218 static void megasas_shutdown_controller(struct megasas_instance *instance,
4219 u32 opcode)
4220 {
4221 struct megasas_cmd *cmd;
4222 struct megasas_dcmd_frame *dcmd;
4223
4224 if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
4225 return;
4226
4227 cmd = megasas_get_cmd(instance);
4228
4229 if (!cmd)
4230 return;
4231
4232 if (instance->aen_cmd)
4233 megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
4234 if (instance->map_update_cmd)
4235 megasas_issue_blocked_abort_cmd(instance,
4236 instance->map_update_cmd);
4237 dcmd = &cmd->frame->dcmd;
4238
4239 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4240
4241 dcmd->cmd = MFI_CMD_DCMD;
4242 dcmd->cmd_status = 0x0;
4243 dcmd->sge_count = 0;
4244 dcmd->flags = MFI_FRAME_DIR_NONE;
4245 dcmd->timeout = 0;
4246 dcmd->pad_0 = 0;
4247 dcmd->data_xfer_len = 0;
4248 dcmd->opcode = opcode;
4249
4250 megasas_issue_blocked_cmd(instance, cmd);
4251
4252 megasas_return_cmd(instance, cmd);
4253
4254 return;
4255 }
4256
4257 #ifdef CONFIG_PM
4258 /**
4259 * megasas_suspend - driver suspend entry point
4260 * @pdev: PCI device structure
4261 * @state: PCI power state to suspend routine
4262 */
4263 static int
4264 megasas_suspend(struct pci_dev *pdev, pm_message_t state)
4265 {
4266 struct Scsi_Host *host;
4267 struct megasas_instance *instance;
4268
4269 instance = pci_get_drvdata(pdev);
4270 host = instance->host;
4271 instance->unload = 1;
4272
4273 if (poll_mode_io)
4274 del_timer_sync(&instance->io_completion_timer);
4275
4276 megasas_flush_cache(instance);
4277 megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
4278
4279 /* cancel the delayed work if this work still in queue */
4280 if (instance->ev != NULL) {
4281 struct megasas_aen_event *ev = instance->ev;
4282 cancel_delayed_work_sync(
4283 (struct delayed_work *)&ev->hotplug_work);
4284 instance->ev = NULL;
4285 }
4286
4287 tasklet_kill(&instance->isr_tasklet);
4288
4289 pci_set_drvdata(instance->pdev, instance);
4290 instance->instancet->disable_intr(instance->reg_set);
4291 free_irq(instance->msi_flag ? instance->msixentry.vector :
4292 instance->pdev->irq, instance);
4293 if (instance->msi_flag)
4294 pci_disable_msix(instance->pdev);
4295
4296 pci_save_state(pdev);
4297 pci_disable_device(pdev);
4298
4299 pci_set_power_state(pdev, pci_choose_state(pdev, state));
4300
4301 return 0;
4302 }
4303
4304 /**
4305 * megasas_resume- driver resume entry point
4306 * @pdev: PCI device structure
4307 */
4308 static int
4309 megasas_resume(struct pci_dev *pdev)
4310 {
4311 int rval;
4312 struct Scsi_Host *host;
4313 struct megasas_instance *instance;
4314
4315 instance = pci_get_drvdata(pdev);
4316 host = instance->host;
4317 pci_set_power_state(pdev, PCI_D0);
4318 pci_enable_wake(pdev, PCI_D0, 0);
4319 pci_restore_state(pdev);
4320
4321 /*
4322 * PCI prepping: enable device set bus mastering and dma mask
4323 */
4324 rval = pci_enable_device_mem(pdev);
4325
4326 if (rval) {
4327 printk(KERN_ERR "megasas: Enable device failed\n");
4328 return rval;
4329 }
4330
4331 pci_set_master(pdev);
4332
4333 if (megasas_set_dma_mask(pdev))
4334 goto fail_set_dma_mask;
4335
4336 /* Now re-enable MSI-X */
4337 if (instance->msi_flag)
4338 pci_enable_msix(instance->pdev, &instance->msixentry, 1);
4339
4340 /*
4341 * Initialize MFI Firmware
4342 */
4343
4344 atomic_set(&instance->fw_outstanding, 0);
4345
4346 /*
4347 * We expect the FW state to be READY
4348 */
4349 if (megasas_transition_to_ready(instance))
4350 goto fail_ready_state;
4351
4352 switch (instance->pdev->device) {
4353 case PCI_DEVICE_ID_LSI_FUSION:
4354 {
4355 megasas_reset_reply_desc(instance);
4356 if (megasas_ioc_init_fusion(instance)) {
4357 megasas_free_cmds(instance);
4358 megasas_free_cmds_fusion(instance);
4359 goto fail_init_mfi;
4360 }
4361 if (!megasas_get_map_info(instance))
4362 megasas_sync_map_info(instance);
4363 }
4364 break;
4365 default:
4366 *instance->producer = 0;
4367 *instance->consumer = 0;
4368 if (megasas_issue_init_mfi(instance))
4369 goto fail_init_mfi;
4370 break;
4371 }
4372
4373 tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
4374 (unsigned long)instance);
4375
4376 /*
4377 * Register IRQ
4378 */
4379 if (request_irq(instance->msi_flag ? instance->msixentry.vector :
4380 pdev->irq, instance->instancet->service_isr,
4381 IRQF_SHARED, "megasas", instance)) {
4382 printk(KERN_ERR "megasas: Failed to register IRQ\n");
4383 goto fail_irq;
4384 }
4385
4386 instance->instancet->enable_intr(instance->reg_set);
4387
4388 /*
4389 * Initiate AEN (Asynchronous Event Notification)
4390 */
4391 if (megasas_start_aen(instance))
4392 printk(KERN_ERR "megasas: Start AEN failed\n");
4393
4394 /* Initialize the cmd completion timer */
4395 if (poll_mode_io)
4396 megasas_start_timer(instance, &instance->io_completion_timer,
4397 megasas_io_completion_timer,
4398 MEGASAS_COMPLETION_TIMER_INTERVAL);
4399 instance->unload = 0;
4400
4401 return 0;
4402
4403 fail_irq:
4404 fail_init_mfi:
4405 if (instance->evt_detail)
4406 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
4407 instance->evt_detail,
4408 instance->evt_detail_h);
4409
4410 if (instance->producer)
4411 pci_free_consistent(pdev, sizeof(u32), instance->producer,
4412 instance->producer_h);
4413 if (instance->consumer)
4414 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
4415 instance->consumer_h);
4416 scsi_host_put(host);
4417
4418 fail_set_dma_mask:
4419 fail_ready_state:
4420
4421 pci_disable_device(pdev);
4422
4423 return -ENODEV;
4424 }
4425 #else
4426 #define megasas_suspend NULL
4427 #define megasas_resume NULL
4428 #endif
4429
4430 /**
4431 * megasas_detach_one - PCI hot"un"plug entry point
4432 * @pdev: PCI device structure
4433 */
4434 static void __devexit megasas_detach_one(struct pci_dev *pdev)
4435 {
4436 int i;
4437 struct Scsi_Host *host;
4438 struct megasas_instance *instance;
4439 struct fusion_context *fusion;
4440
4441 instance = pci_get_drvdata(pdev);
4442 instance->unload = 1;
4443 host = instance->host;
4444 fusion = instance->ctrl_context;
4445
4446 if (poll_mode_io)
4447 del_timer_sync(&instance->io_completion_timer);
4448
4449 scsi_remove_host(instance->host);
4450 megasas_flush_cache(instance);
4451 megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
4452
4453 /* cancel the delayed work if this work still in queue*/
4454 if (instance->ev != NULL) {
4455 struct megasas_aen_event *ev = instance->ev;
4456 cancel_delayed_work_sync(
4457 (struct delayed_work *)&ev->hotplug_work);
4458 instance->ev = NULL;
4459 }
4460
4461 tasklet_kill(&instance->isr_tasklet);
4462
4463 /*
4464 * Take the instance off the instance array. Note that we will not
4465 * decrement the max_index. We let this array be sparse array
4466 */
4467 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
4468 if (megasas_mgmt_info.instance[i] == instance) {
4469 megasas_mgmt_info.count--;
4470 megasas_mgmt_info.instance[i] = NULL;
4471
4472 break;
4473 }
4474 }
4475
4476 pci_set_drvdata(instance->pdev, NULL);
4477
4478 instance->instancet->disable_intr(instance->reg_set);
4479
4480 free_irq(instance->msi_flag ? instance->msixentry.vector :
4481 instance->pdev->irq, instance);
4482 if (instance->msi_flag)
4483 pci_disable_msix(instance->pdev);
4484
4485 switch (instance->pdev->device) {
4486 case PCI_DEVICE_ID_LSI_FUSION:
4487 megasas_release_fusion(instance);
4488 for (i = 0; i < 2 ; i++)
4489 if (fusion->ld_map[i])
4490 dma_free_coherent(&instance->pdev->dev,
4491 fusion->map_sz,
4492 fusion->ld_map[i],
4493 fusion->
4494 ld_map_phys[i]);
4495 kfree(instance->ctrl_context);
4496 break;
4497 default:
4498 megasas_release_mfi(instance);
4499 pci_free_consistent(pdev,
4500 sizeof(struct megasas_evt_detail),
4501 instance->evt_detail,
4502 instance->evt_detail_h);
4503 pci_free_consistent(pdev, sizeof(u32),
4504 instance->producer,
4505 instance->producer_h);
4506 pci_free_consistent(pdev, sizeof(u32),
4507 instance->consumer,
4508 instance->consumer_h);
4509 break;
4510 }
4511
4512 scsi_host_put(host);
4513
4514 pci_set_drvdata(pdev, NULL);
4515
4516 pci_disable_device(pdev);
4517
4518 return;
4519 }
4520
4521 /**
4522 * megasas_shutdown - Shutdown entry point
4523 * @device: Generic device structure
4524 */
4525 static void megasas_shutdown(struct pci_dev *pdev)
4526 {
4527 struct megasas_instance *instance = pci_get_drvdata(pdev);
4528 instance->unload = 1;
4529 megasas_flush_cache(instance);
4530 megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
4531 }
4532
4533 /**
4534 * megasas_mgmt_open - char node "open" entry point
4535 */
4536 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
4537 {
4538 /*
4539 * Allow only those users with admin rights
4540 */
4541 if (!capable(CAP_SYS_ADMIN))
4542 return -EACCES;
4543
4544 return 0;
4545 }
4546
4547 /**
4548 * megasas_mgmt_fasync - Async notifier registration from applications
4549 *
4550 * This function adds the calling process to a driver global queue. When an
4551 * event occurs, SIGIO will be sent to all processes in this queue.
4552 */
4553 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
4554 {
4555 int rc;
4556
4557 mutex_lock(&megasas_async_queue_mutex);
4558
4559 rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
4560
4561 mutex_unlock(&megasas_async_queue_mutex);
4562
4563 if (rc >= 0) {
4564 /* For sanity check when we get ioctl */
4565 filep->private_data = filep;
4566 return 0;
4567 }
4568
4569 printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
4570
4571 return rc;
4572 }
4573
4574 /**
4575 * megasas_mgmt_poll - char node "poll" entry point
4576 * */
4577 static unsigned int megasas_mgmt_poll(struct file *file, poll_table *wait)
4578 {
4579 unsigned int mask;
4580 unsigned long flags;
4581 poll_wait(file, &megasas_poll_wait, wait);
4582 spin_lock_irqsave(&poll_aen_lock, flags);
4583 if (megasas_poll_wait_aen)
4584 mask = (POLLIN | POLLRDNORM);
4585 else
4586 mask = 0;
4587 spin_unlock_irqrestore(&poll_aen_lock, flags);
4588 return mask;
4589 }
4590
4591 /**
4592 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
4593 * @instance: Adapter soft state
4594 * @argp: User's ioctl packet
4595 */
4596 static int
4597 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
4598 struct megasas_iocpacket __user * user_ioc,
4599 struct megasas_iocpacket *ioc)
4600 {
4601 struct megasas_sge32 *kern_sge32;
4602 struct megasas_cmd *cmd;
4603 void *kbuff_arr[MAX_IOCTL_SGE];
4604 dma_addr_t buf_handle = 0;
4605 int error = 0, i;
4606 void *sense = NULL;
4607 dma_addr_t sense_handle;
4608 unsigned long *sense_ptr;
4609
4610 memset(kbuff_arr, 0, sizeof(kbuff_arr));
4611
4612 if (ioc->sge_count > MAX_IOCTL_SGE) {
4613 printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n",
4614 ioc->sge_count, MAX_IOCTL_SGE);
4615 return -EINVAL;
4616 }
4617
4618 cmd = megasas_get_cmd(instance);
4619 if (!cmd) {
4620 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
4621 return -ENOMEM;
4622 }
4623
4624 /*
4625 * User's IOCTL packet has 2 frames (maximum). Copy those two
4626 * frames into our cmd's frames. cmd->frame's context will get
4627 * overwritten when we copy from user's frames. So set that value
4628 * alone separately
4629 */
4630 memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
4631 cmd->frame->hdr.context = cmd->index;
4632 cmd->frame->hdr.pad_0 = 0;
4633
4634 /*
4635 * The management interface between applications and the fw uses
4636 * MFI frames. E.g, RAID configuration changes, LD property changes
4637 * etc are accomplishes through different kinds of MFI frames. The
4638 * driver needs to care only about substituting user buffers with
4639 * kernel buffers in SGLs. The location of SGL is embedded in the
4640 * struct iocpacket itself.
4641 */
4642 kern_sge32 = (struct megasas_sge32 *)
4643 ((unsigned long)cmd->frame + ioc->sgl_off);
4644
4645 /*
4646 * For each user buffer, create a mirror buffer and copy in
4647 */
4648 for (i = 0; i < ioc->sge_count; i++) {
4649 if (!ioc->sgl[i].iov_len)
4650 continue;
4651
4652 kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
4653 ioc->sgl[i].iov_len,
4654 &buf_handle, GFP_KERNEL);
4655 if (!kbuff_arr[i]) {
4656 printk(KERN_DEBUG "megasas: Failed to alloc "
4657 "kernel SGL buffer for IOCTL \n");
4658 error = -ENOMEM;
4659 goto out;
4660 }
4661
4662 /*
4663 * We don't change the dma_coherent_mask, so
4664 * pci_alloc_consistent only returns 32bit addresses
4665 */
4666 kern_sge32[i].phys_addr = (u32) buf_handle;
4667 kern_sge32[i].length = ioc->sgl[i].iov_len;
4668
4669 /*
4670 * We created a kernel buffer corresponding to the
4671 * user buffer. Now copy in from the user buffer
4672 */
4673 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
4674 (u32) (ioc->sgl[i].iov_len))) {
4675 error = -EFAULT;
4676 goto out;
4677 }
4678 }
4679
4680 if (ioc->sense_len) {
4681 sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
4682 &sense_handle, GFP_KERNEL);
4683 if (!sense) {
4684 error = -ENOMEM;
4685 goto out;
4686 }
4687
4688 sense_ptr =
4689 (unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
4690 *sense_ptr = sense_handle;
4691 }
4692
4693 /*
4694 * Set the sync_cmd flag so that the ISR knows not to complete this
4695 * cmd to the SCSI mid-layer
4696 */
4697 cmd->sync_cmd = 1;
4698 megasas_issue_blocked_cmd(instance, cmd);
4699 cmd->sync_cmd = 0;
4700
4701 /*
4702 * copy out the kernel buffers to user buffers
4703 */
4704 for (i = 0; i < ioc->sge_count; i++) {
4705 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
4706 ioc->sgl[i].iov_len)) {
4707 error = -EFAULT;
4708 goto out;
4709 }
4710 }
4711
4712 /*
4713 * copy out the sense
4714 */
4715 if (ioc->sense_len) {
4716 /*
4717 * sense_ptr points to the location that has the user
4718 * sense buffer address
4719 */
4720 sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
4721 ioc->sense_off);
4722
4723 if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
4724 sense, ioc->sense_len)) {
4725 printk(KERN_ERR "megasas: Failed to copy out to user "
4726 "sense data\n");
4727 error = -EFAULT;
4728 goto out;
4729 }
4730 }
4731
4732 /*
4733 * copy the status codes returned by the fw
4734 */
4735 if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
4736 &cmd->frame->hdr.cmd_status, sizeof(u8))) {
4737 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
4738 error = -EFAULT;
4739 }
4740
4741 out:
4742 if (sense) {
4743 dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
4744 sense, sense_handle);
4745 }
4746
4747 for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
4748 dma_free_coherent(&instance->pdev->dev,
4749 kern_sge32[i].length,
4750 kbuff_arr[i], kern_sge32[i].phys_addr);
4751 }
4752
4753 megasas_return_cmd(instance, cmd);
4754 return error;
4755 }
4756
4757 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
4758 {
4759 struct megasas_iocpacket __user *user_ioc =
4760 (struct megasas_iocpacket __user *)arg;
4761 struct megasas_iocpacket *ioc;
4762 struct megasas_instance *instance;
4763 int error;
4764 int i;
4765 unsigned long flags;
4766 u32 wait_time = MEGASAS_RESET_WAIT_TIME;
4767
4768 ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
4769 if (!ioc)
4770 return -ENOMEM;
4771
4772 if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
4773 error = -EFAULT;
4774 goto out_kfree_ioc;
4775 }
4776
4777 instance = megasas_lookup_instance(ioc->host_no);
4778 if (!instance) {
4779 error = -ENODEV;
4780 goto out_kfree_ioc;
4781 }
4782
4783 if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
4784 printk(KERN_ERR "Controller in crit error\n");
4785 error = -ENODEV;
4786 goto out_kfree_ioc;
4787 }
4788
4789 if (instance->unload == 1) {
4790 error = -ENODEV;
4791 goto out_kfree_ioc;
4792 }
4793
4794 /*
4795 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
4796 */
4797 if (down_interruptible(&instance->ioctl_sem)) {
4798 error = -ERESTARTSYS;
4799 goto out_kfree_ioc;
4800 }
4801
4802 for (i = 0; i < wait_time; i++) {
4803
4804 spin_lock_irqsave(&instance->hba_lock, flags);
4805 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
4806 spin_unlock_irqrestore(&instance->hba_lock, flags);
4807 break;
4808 }
4809 spin_unlock_irqrestore(&instance->hba_lock, flags);
4810
4811 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
4812 printk(KERN_NOTICE "megasas: waiting"
4813 "for controller reset to finish\n");
4814 }
4815
4816 msleep(1000);
4817 }
4818
4819 spin_lock_irqsave(&instance->hba_lock, flags);
4820 if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
4821 spin_unlock_irqrestore(&instance->hba_lock, flags);
4822
4823 printk(KERN_ERR "megaraid_sas: timed out while"
4824 "waiting for HBA to recover\n");
4825 error = -ENODEV;
4826 goto out_kfree_ioc;
4827 }
4828 spin_unlock_irqrestore(&instance->hba_lock, flags);
4829
4830 error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
4831 up(&instance->ioctl_sem);
4832
4833 out_kfree_ioc:
4834 kfree(ioc);
4835 return error;
4836 }
4837
4838 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
4839 {
4840 struct megasas_instance *instance;
4841 struct megasas_aen aen;
4842 int error;
4843 int i;
4844 unsigned long flags;
4845 u32 wait_time = MEGASAS_RESET_WAIT_TIME;
4846
4847 if (file->private_data != file) {
4848 printk(KERN_DEBUG "megasas: fasync_helper was not "
4849 "called first\n");
4850 return -EINVAL;
4851 }
4852
4853 if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
4854 return -EFAULT;
4855
4856 instance = megasas_lookup_instance(aen.host_no);
4857
4858 if (!instance)
4859 return -ENODEV;
4860
4861 if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
4862 return -ENODEV;
4863 }
4864
4865 if (instance->unload == 1) {
4866 return -ENODEV;
4867 }
4868
4869 for (i = 0; i < wait_time; i++) {
4870
4871 spin_lock_irqsave(&instance->hba_lock, flags);
4872 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
4873 spin_unlock_irqrestore(&instance->hba_lock,
4874 flags);
4875 break;
4876 }
4877
4878 spin_unlock_irqrestore(&instance->hba_lock, flags);
4879
4880 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
4881 printk(KERN_NOTICE "megasas: waiting for"
4882 "controller reset to finish\n");
4883 }
4884
4885 msleep(1000);
4886 }
4887
4888 spin_lock_irqsave(&instance->hba_lock, flags);
4889 if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
4890 spin_unlock_irqrestore(&instance->hba_lock, flags);
4891 printk(KERN_ERR "megaraid_sas: timed out while waiting"
4892 "for HBA to recover.\n");
4893 return -ENODEV;
4894 }
4895 spin_unlock_irqrestore(&instance->hba_lock, flags);
4896
4897 mutex_lock(&instance->aen_mutex);
4898 error = megasas_register_aen(instance, aen.seq_num,
4899 aen.class_locale_word);
4900 mutex_unlock(&instance->aen_mutex);
4901 return error;
4902 }
4903
4904 /**
4905 * megasas_mgmt_ioctl - char node ioctl entry point
4906 */
4907 static long
4908 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
4909 {
4910 switch (cmd) {
4911 case MEGASAS_IOC_FIRMWARE:
4912 return megasas_mgmt_ioctl_fw(file, arg);
4913
4914 case MEGASAS_IOC_GET_AEN:
4915 return megasas_mgmt_ioctl_aen(file, arg);
4916 }
4917
4918 return -ENOTTY;
4919 }
4920
4921 #ifdef CONFIG_COMPAT
4922 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
4923 {
4924 struct compat_megasas_iocpacket __user *cioc =
4925 (struct compat_megasas_iocpacket __user *)arg;
4926 struct megasas_iocpacket __user *ioc =
4927 compat_alloc_user_space(sizeof(struct megasas_iocpacket));
4928 int i;
4929 int error = 0;
4930 compat_uptr_t ptr;
4931
4932 if (clear_user(ioc, sizeof(*ioc)))
4933 return -EFAULT;
4934
4935 if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
4936 copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
4937 copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
4938 copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
4939 copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
4940 copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
4941 return -EFAULT;
4942
4943 /*
4944 * The sense_ptr is used in megasas_mgmt_fw_ioctl only when
4945 * sense_len is not null, so prepare the 64bit value under
4946 * the same condition.
4947 */
4948 if (ioc->sense_len) {
4949 void __user **sense_ioc_ptr =
4950 (void __user **)(ioc->frame.raw + ioc->sense_off);
4951 compat_uptr_t *sense_cioc_ptr =
4952 (compat_uptr_t *)(cioc->frame.raw + cioc->sense_off);
4953 if (get_user(ptr, sense_cioc_ptr) ||
4954 put_user(compat_ptr(ptr), sense_ioc_ptr))
4955 return -EFAULT;
4956 }
4957
4958 for (i = 0; i < MAX_IOCTL_SGE; i++) {
4959 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
4960 put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
4961 copy_in_user(&ioc->sgl[i].iov_len,
4962 &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
4963 return -EFAULT;
4964 }
4965
4966 error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
4967
4968 if (copy_in_user(&cioc->frame.hdr.cmd_status,
4969 &ioc->frame.hdr.cmd_status, sizeof(u8))) {
4970 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
4971 return -EFAULT;
4972 }
4973 return error;
4974 }
4975
4976 static long
4977 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
4978 unsigned long arg)
4979 {
4980 switch (cmd) {
4981 case MEGASAS_IOC_FIRMWARE32:
4982 return megasas_mgmt_compat_ioctl_fw(file, arg);
4983 case MEGASAS_IOC_GET_AEN:
4984 return megasas_mgmt_ioctl_aen(file, arg);
4985 }
4986
4987 return -ENOTTY;
4988 }
4989 #endif
4990
4991 /*
4992 * File operations structure for management interface
4993 */
4994 static const struct file_operations megasas_mgmt_fops = {
4995 .owner = THIS_MODULE,
4996 .open = megasas_mgmt_open,
4997 .fasync = megasas_mgmt_fasync,
4998 .unlocked_ioctl = megasas_mgmt_ioctl,
4999 .poll = megasas_mgmt_poll,
5000 #ifdef CONFIG_COMPAT
5001 .compat_ioctl = megasas_mgmt_compat_ioctl,
5002 #endif
5003 .llseek = noop_llseek,
5004 };
5005
5006 /*
5007 * PCI hotplug support registration structure
5008 */
5009 static struct pci_driver megasas_pci_driver = {
5010
5011 .name = "megaraid_sas",
5012 .id_table = megasas_pci_table,
5013 .probe = megasas_probe_one,
5014 .remove = __devexit_p(megasas_detach_one),
5015 .suspend = megasas_suspend,
5016 .resume = megasas_resume,
5017 .shutdown = megasas_shutdown,
5018 };
5019
5020 /*
5021 * Sysfs driver attributes
5022 */
5023 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
5024 {
5025 return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
5026 MEGASAS_VERSION);
5027 }
5028
5029 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
5030
5031 static ssize_t
5032 megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
5033 {
5034 return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
5035 MEGASAS_RELDATE);
5036 }
5037
5038 static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
5039 NULL);
5040
5041 static ssize_t
5042 megasas_sysfs_show_support_poll_for_event(struct device_driver *dd, char *buf)
5043 {
5044 return sprintf(buf, "%u\n", support_poll_for_event);
5045 }
5046
5047 static DRIVER_ATTR(support_poll_for_event, S_IRUGO,
5048 megasas_sysfs_show_support_poll_for_event, NULL);
5049
5050 static ssize_t
5051 megasas_sysfs_show_support_device_change(struct device_driver *dd, char *buf)
5052 {
5053 return sprintf(buf, "%u\n", support_device_change);
5054 }
5055
5056 static DRIVER_ATTR(support_device_change, S_IRUGO,
5057 megasas_sysfs_show_support_device_change, NULL);
5058
5059 static ssize_t
5060 megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
5061 {
5062 return sprintf(buf, "%u\n", megasas_dbg_lvl);
5063 }
5064
5065 static ssize_t
5066 megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count)
5067 {
5068 int retval = count;
5069 if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){
5070 printk(KERN_ERR "megasas: could not set dbg_lvl\n");
5071 retval = -EINVAL;
5072 }
5073 return retval;
5074 }
5075
5076 static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUSR, megasas_sysfs_show_dbg_lvl,
5077 megasas_sysfs_set_dbg_lvl);
5078
5079 static ssize_t
5080 megasas_sysfs_show_poll_mode_io(struct device_driver *dd, char *buf)
5081 {
5082 return sprintf(buf, "%u\n", poll_mode_io);
5083 }
5084
5085 static ssize_t
5086 megasas_sysfs_set_poll_mode_io(struct device_driver *dd,
5087 const char *buf, size_t count)
5088 {
5089 int retval = count;
5090 int tmp = poll_mode_io;
5091 int i;
5092 struct megasas_instance *instance;
5093
5094 if (sscanf(buf, "%u", &poll_mode_io) < 1) {
5095 printk(KERN_ERR "megasas: could not set poll_mode_io\n");
5096 retval = -EINVAL;
5097 }
5098
5099 /*
5100 * Check if poll_mode_io is already set or is same as previous value
5101 */
5102 if ((tmp && poll_mode_io) || (tmp == poll_mode_io))
5103 goto out;
5104
5105 if (poll_mode_io) {
5106 /*
5107 * Start timers for all adapters
5108 */
5109 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5110 instance = megasas_mgmt_info.instance[i];
5111 if (instance) {
5112 megasas_start_timer(instance,
5113 &instance->io_completion_timer,
5114 megasas_io_completion_timer,
5115 MEGASAS_COMPLETION_TIMER_INTERVAL);
5116 }
5117 }
5118 } else {
5119 /*
5120 * Delete timers for all adapters
5121 */
5122 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5123 instance = megasas_mgmt_info.instance[i];
5124 if (instance)
5125 del_timer_sync(&instance->io_completion_timer);
5126 }
5127 }
5128
5129 out:
5130 return retval;
5131 }
5132
5133 static void
5134 megasas_aen_polling(struct work_struct *work)
5135 {
5136 struct megasas_aen_event *ev =
5137 container_of(work, struct megasas_aen_event, hotplug_work);
5138 struct megasas_instance *instance = ev->instance;
5139 union megasas_evt_class_locale class_locale;
5140 struct Scsi_Host *host;
5141 struct scsi_device *sdev1;
5142 u16 pd_index = 0;
5143 u16 ld_index = 0;
5144 int i, j, doscan = 0;
5145 u32 seq_num;
5146 int error;
5147
5148 if (!instance) {
5149 printk(KERN_ERR "invalid instance!\n");
5150 kfree(ev);
5151 return;
5152 }
5153 instance->ev = NULL;
5154 host = instance->host;
5155 if (instance->evt_detail) {
5156
5157 switch (instance->evt_detail->code) {
5158 case MR_EVT_PD_INSERTED:
5159 if (megasas_get_pd_list(instance) == 0) {
5160 for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
5161 for (j = 0;
5162 j < MEGASAS_MAX_DEV_PER_CHANNEL;
5163 j++) {
5164
5165 pd_index =
5166 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5167
5168 sdev1 =
5169 scsi_device_lookup(host, i, j, 0);
5170
5171 if (instance->pd_list[pd_index].driveState
5172 == MR_PD_STATE_SYSTEM) {
5173 if (!sdev1) {
5174 scsi_add_device(host, i, j, 0);
5175 }
5176
5177 if (sdev1)
5178 scsi_device_put(sdev1);
5179 }
5180 }
5181 }
5182 }
5183 doscan = 0;
5184 break;
5185
5186 case MR_EVT_PD_REMOVED:
5187 if (megasas_get_pd_list(instance) == 0) {
5188 megasas_get_pd_list(instance);
5189 for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
5190 for (j = 0;
5191 j < MEGASAS_MAX_DEV_PER_CHANNEL;
5192 j++) {
5193
5194 pd_index =
5195 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5196
5197 sdev1 =
5198 scsi_device_lookup(host, i, j, 0);
5199
5200 if (instance->pd_list[pd_index].driveState
5201 == MR_PD_STATE_SYSTEM) {
5202 if (sdev1) {
5203 scsi_device_put(sdev1);
5204 }
5205 } else {
5206 if (sdev1) {
5207 scsi_remove_device(sdev1);
5208 scsi_device_put(sdev1);
5209 }
5210 }
5211 }
5212 }
5213 }
5214 doscan = 0;
5215 break;
5216
5217 case MR_EVT_LD_OFFLINE:
5218 case MR_EVT_CFG_CLEARED:
5219 case MR_EVT_LD_DELETED:
5220 megasas_get_ld_list(instance);
5221 for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
5222 for (j = 0;
5223 j < MEGASAS_MAX_DEV_PER_CHANNEL;
5224 j++) {
5225
5226 ld_index =
5227 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5228
5229 sdev1 = scsi_device_lookup(host,
5230 i + MEGASAS_MAX_LD_CHANNELS,
5231 j,
5232 0);
5233
5234 if (instance->ld_ids[ld_index] != 0xff) {
5235 if (sdev1) {
5236 scsi_device_put(sdev1);
5237 }
5238 } else {
5239 if (sdev1) {
5240 scsi_remove_device(sdev1);
5241 scsi_device_put(sdev1);
5242 }
5243 }
5244 }
5245 }
5246 doscan = 0;
5247 break;
5248 case MR_EVT_LD_CREATED:
5249 megasas_get_ld_list(instance);
5250 for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
5251 for (j = 0;
5252 j < MEGASAS_MAX_DEV_PER_CHANNEL;
5253 j++) {
5254 ld_index =
5255 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5256
5257 sdev1 = scsi_device_lookup(host,
5258 i+MEGASAS_MAX_LD_CHANNELS,
5259 j, 0);
5260
5261 if (instance->ld_ids[ld_index] !=
5262 0xff) {
5263 if (!sdev1) {
5264 scsi_add_device(host,
5265 i + 2,
5266 j, 0);
5267 }
5268 }
5269 if (sdev1) {
5270 scsi_device_put(sdev1);
5271 }
5272 }
5273 }
5274 doscan = 0;
5275 break;
5276 case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
5277 case MR_EVT_FOREIGN_CFG_IMPORTED:
5278 case MR_EVT_LD_STATE_CHANGE:
5279 doscan = 1;
5280 break;
5281 default:
5282 doscan = 0;
5283 break;
5284 }
5285 } else {
5286 printk(KERN_ERR "invalid evt_detail!\n");
5287 kfree(ev);
5288 return;
5289 }
5290
5291 if (doscan) {
5292 printk(KERN_INFO "scanning ...\n");
5293 megasas_get_pd_list(instance);
5294 for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
5295 for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
5296 pd_index = i*MEGASAS_MAX_DEV_PER_CHANNEL + j;
5297 sdev1 = scsi_device_lookup(host, i, j, 0);
5298 if (instance->pd_list[pd_index].driveState ==
5299 MR_PD_STATE_SYSTEM) {
5300 if (!sdev1) {
5301 scsi_add_device(host, i, j, 0);
5302 }
5303 if (sdev1)
5304 scsi_device_put(sdev1);
5305 } else {
5306 if (sdev1) {
5307 scsi_remove_device(sdev1);
5308 scsi_device_put(sdev1);
5309 }
5310 }
5311 }
5312 }
5313
5314 megasas_get_ld_list(instance);
5315 for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
5316 for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
5317 ld_index =
5318 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5319
5320 sdev1 = scsi_device_lookup(host,
5321 i+MEGASAS_MAX_LD_CHANNELS, j, 0);
5322 if (instance->ld_ids[ld_index] != 0xff) {
5323 if (!sdev1) {
5324 scsi_add_device(host,
5325 i+2,
5326 j, 0);
5327 } else {
5328 scsi_device_put(sdev1);
5329 }
5330 } else {
5331 if (sdev1) {
5332 scsi_remove_device(sdev1);
5333 scsi_device_put(sdev1);
5334 }
5335 }
5336 }
5337 }
5338 }
5339
5340 if ( instance->aen_cmd != NULL ) {
5341 kfree(ev);
5342 return ;
5343 }
5344
5345 seq_num = instance->evt_detail->seq_num + 1;
5346
5347 /* Register AEN with FW for latest sequence number plus 1 */
5348 class_locale.members.reserved = 0;
5349 class_locale.members.locale = MR_EVT_LOCALE_ALL;
5350 class_locale.members.class = MR_EVT_CLASS_DEBUG;
5351 mutex_lock(&instance->aen_mutex);
5352 error = megasas_register_aen(instance, seq_num,
5353 class_locale.word);
5354 mutex_unlock(&instance->aen_mutex);
5355
5356 if (error)
5357 printk(KERN_ERR "register aen failed error %x\n", error);
5358
5359 kfree(ev);
5360 }
5361
5362
5363 static DRIVER_ATTR(poll_mode_io, S_IRUGO|S_IWUSR,
5364 megasas_sysfs_show_poll_mode_io,
5365 megasas_sysfs_set_poll_mode_io);
5366
5367 /**
5368 * megasas_init - Driver load entry point
5369 */
5370 static int __init megasas_init(void)
5371 {
5372 int rval;
5373
5374 /*
5375 * Announce driver version and other information
5376 */
5377 printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
5378 MEGASAS_EXT_VERSION);
5379
5380 support_poll_for_event = 2;
5381 support_device_change = 1;
5382
5383 memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
5384
5385 /*
5386 * Register character device node
5387 */
5388 rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
5389
5390 if (rval < 0) {
5391 printk(KERN_DEBUG "megasas: failed to open device node\n");
5392 return rval;
5393 }
5394
5395 megasas_mgmt_majorno = rval;
5396
5397 /*
5398 * Register ourselves as PCI hotplug module
5399 */
5400 rval = pci_register_driver(&megasas_pci_driver);
5401
5402 if (rval) {
5403 printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
5404 goto err_pcidrv;
5405 }
5406
5407 rval = driver_create_file(&megasas_pci_driver.driver,
5408 &driver_attr_version);
5409 if (rval)
5410 goto err_dcf_attr_ver;
5411 rval = driver_create_file(&megasas_pci_driver.driver,
5412 &driver_attr_release_date);
5413 if (rval)
5414 goto err_dcf_rel_date;
5415
5416 rval = driver_create_file(&megasas_pci_driver.driver,
5417 &driver_attr_support_poll_for_event);
5418 if (rval)
5419 goto err_dcf_support_poll_for_event;
5420
5421 rval = driver_create_file(&megasas_pci_driver.driver,
5422 &driver_attr_dbg_lvl);
5423 if (rval)
5424 goto err_dcf_dbg_lvl;
5425 rval = driver_create_file(&megasas_pci_driver.driver,
5426 &driver_attr_poll_mode_io);
5427 if (rval)
5428 goto err_dcf_poll_mode_io;
5429
5430 rval = driver_create_file(&megasas_pci_driver.driver,
5431 &driver_attr_support_device_change);
5432 if (rval)
5433 goto err_dcf_support_device_change;
5434
5435 return rval;
5436
5437 err_dcf_support_device_change:
5438 driver_remove_file(&megasas_pci_driver.driver,
5439 &driver_attr_poll_mode_io);
5440
5441 err_dcf_poll_mode_io:
5442 driver_remove_file(&megasas_pci_driver.driver,
5443 &driver_attr_dbg_lvl);
5444 err_dcf_dbg_lvl:
5445 driver_remove_file(&megasas_pci_driver.driver,
5446 &driver_attr_support_poll_for_event);
5447
5448 err_dcf_support_poll_for_event:
5449 driver_remove_file(&megasas_pci_driver.driver,
5450 &driver_attr_release_date);
5451
5452 err_dcf_rel_date:
5453 driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
5454 err_dcf_attr_ver:
5455 pci_unregister_driver(&megasas_pci_driver);
5456 err_pcidrv:
5457 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
5458 return rval;
5459 }
5460
5461 /**
5462 * megasas_exit - Driver unload entry point
5463 */
5464 static void __exit megasas_exit(void)
5465 {
5466 driver_remove_file(&megasas_pci_driver.driver,
5467 &driver_attr_poll_mode_io);
5468 driver_remove_file(&megasas_pci_driver.driver,
5469 &driver_attr_dbg_lvl);
5470 driver_remove_file(&megasas_pci_driver.driver,
5471 &driver_attr_support_poll_for_event);
5472 driver_remove_file(&megasas_pci_driver.driver,
5473 &driver_attr_support_device_change);
5474 driver_remove_file(&megasas_pci_driver.driver,
5475 &driver_attr_release_date);
5476 driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
5477
5478 pci_unregister_driver(&megasas_pci_driver);
5479 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
5480 }
5481
5482 module_init(megasas_init);
5483 module_exit(megasas_exit);