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 : v00.00.05.29-rc1
22  *
23  *  Authors: LSI Corporation
24  *           Sreenivas Bagalkote
25  *           Sumant Patro
26  *           Bo Yang
27  *
28  *  Send feedback to: <megaraidlinux@lsi.com>
29  *
30  *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
31  *     ATTN: Linuxraid
32  */
33 
34 #include <linux/kernel.h>
35 #include <linux/types.h>
36 #include <linux/pci.h>
37 #include <linux/list.h>
38 #include <linux/moduleparam.h>
39 #include <linux/module.h>
40 #include <linux/spinlock.h>
41 #include <linux/interrupt.h>
42 #include <linux/delay.h>
43 #include <linux/uio.h>
44 #include <linux/slab.h>
45 #include <asm/uaccess.h>
46 #include <linux/fs.h>
47 #include <linux/compat.h>
48 #include <linux/blkdev.h>
49 #include <linux/mutex.h>
50 #include <linux/poll.h>
51 
52 #include <scsi/scsi.h>
53 #include <scsi/scsi_cmnd.h>
54 #include <scsi/scsi_device.h>
55 #include <scsi/scsi_host.h>
56 #include "megaraid_sas_fusion.h"
57 #include "megaraid_sas.h"
58 
59 /*
60  * poll_mode_io:1- schedule complete completion from q cmd
61  */
62 static unsigned int poll_mode_io;
63 module_param_named(poll_mode_io, poll_mode_io, int, 0);
64 MODULE_PARM_DESC(poll_mode_io,
65 	"Complete cmds from IO path, (default=0)");
66 
67 /*
68  * Number of sectors per IO command
69  * Will be set in megasas_init_mfi if user does not provide
70  */
71 static unsigned int max_sectors;
72 module_param_named(max_sectors, max_sectors, int, 0);
73 MODULE_PARM_DESC(max_sectors,
74 	"Maximum number of sectors per IO command");
75 
76 static int msix_disable;
77 module_param(msix_disable, int, S_IRUGO);
78 MODULE_PARM_DESC(msix_disable, "Disable MSI-X interrupt handling. Default: 0");
79 
80 MODULE_LICENSE("GPL");
81 MODULE_VERSION(MEGASAS_VERSION);
82 MODULE_AUTHOR("megaraidlinux@lsi.com");
83 MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
84 
85 int megasas_transition_to_ready(struct megasas_instance *instance);
86 static int megasas_get_pd_list(struct megasas_instance *instance);
87 static int megasas_issue_init_mfi(struct megasas_instance *instance);
88 static int megasas_register_aen(struct megasas_instance *instance,
89 				u32 seq_num, u32 class_locale_word);
90 /*
91  * PCI ID table for all supported controllers
92  */
93 static struct pci_device_id megasas_pci_table[] = {
94 
95 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
96 	/* xscale IOP */
97 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
98 	/* ppc IOP */
99 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
100 	/* ppc IOP */
101 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
102 	/* gen2*/
103 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
104 	/* gen2*/
105 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
106 	/* skinny*/
107 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
108 	/* skinny*/
109 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
110 	/* xscale IOP, vega */
111 	{PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
112 	/* xscale IOP */
113 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
114 	/* Fusion */
115 	{}
116 };
117 
118 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
119 
120 static int megasas_mgmt_majorno;
121 static struct megasas_mgmt_info megasas_mgmt_info;
122 static struct fasync_struct *megasas_async_queue;
123 static DEFINE_MUTEX(megasas_async_queue_mutex);
124 
125 static int megasas_poll_wait_aen;
126 static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
127 static u32 support_poll_for_event;
128 u32 megasas_dbg_lvl;
129 static u32 support_device_change;
130 
131 /* define lock for aen poll */
132 spinlock_t poll_aen_lock;
133 
134 void
135 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
136 		     u8 alt_status);
137 
138 static irqreturn_t megasas_isr(int irq, void *devp);
139 static u32
140 megasas_init_adapter_mfi(struct megasas_instance *instance);
141 u32
142 megasas_build_and_issue_cmd(struct megasas_instance *instance,
143 			    struct scsi_cmnd *scmd);
144 static void megasas_complete_cmd_dpc(unsigned long instance_addr);
145 void
146 megasas_release_fusion(struct megasas_instance *instance);
147 int
148 megasas_ioc_init_fusion(struct megasas_instance *instance);
149 void
150 megasas_free_cmds_fusion(struct megasas_instance *instance);
151 u8
152 megasas_get_map_info(struct megasas_instance *instance);
153 int
154 megasas_sync_map_info(struct megasas_instance *instance);
155 int
156 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd);
157 void megasas_reset_reply_desc(struct megasas_instance *instance);
158 u8 MR_ValidateMapInfo(struct MR_FW_RAID_MAP_ALL *map,
159 		      struct LD_LOAD_BALANCE_INFO *lbInfo);
160 int megasas_reset_fusion(struct Scsi_Host *shost);
161 void megasas_fusion_ocr_wq(struct work_struct *work);
162 
163 void
164 megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
165 {
166 	instance->instancet->fire_cmd(instance,
167 		cmd->frame_phys_addr, 0, instance->reg_set);
168 }
169 
170 /**
171  * megasas_get_cmd -	Get a command from the free pool
172  * @instance:		Adapter soft state
173  *
174  * Returns a free command from the pool
175  */
176 struct megasas_cmd *megasas_get_cmd(struct megasas_instance
177 						  *instance)
178 {
179 	unsigned long flags;
180 	struct megasas_cmd *cmd = NULL;
181 
182 	spin_lock_irqsave(&instance->cmd_pool_lock, flags);
183 
184 	if (!list_empty(&instance->cmd_pool)) {
185 		cmd = list_entry((&instance->cmd_pool)->next,
186 				 struct megasas_cmd, list);
187 		list_del_init(&cmd->list);
188 	} else {
189 		printk(KERN_ERR "megasas: Command pool empty!\n");
190 	}
191 
192 	spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
193 	return cmd;
194 }
195 
196 /**
197  * megasas_return_cmd -	Return a cmd to free command pool
198  * @instance:		Adapter soft state
199  * @cmd:		Command packet to be returned to free command pool
200  */
201 inline void
202 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
203 {
204 	unsigned long flags;
205 
206 	spin_lock_irqsave(&instance->cmd_pool_lock, flags);
207 
208 	cmd->scmd = NULL;
209 	cmd->frame_count = 0;
210 	list_add_tail(&cmd->list, &instance->cmd_pool);
211 
212 	spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
213 }
214 
215 
216 /**
217 *	The following functions are defined for xscale
218 *	(deviceid : 1064R, PERC5) controllers
219 */
220 
221 /**
222  * megasas_enable_intr_xscale -	Enables interrupts
223  * @regs:			MFI register set
224  */
225 static inline void
226 megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs)
227 {
228 	writel(0, &(regs)->outbound_intr_mask);
229 
230 	/* Dummy readl to force pci flush */
231 	readl(&regs->outbound_intr_mask);
232 }
233 
234 /**
235  * megasas_disable_intr_xscale -Disables interrupt
236  * @regs:			MFI register set
237  */
238 static inline void
239 megasas_disable_intr_xscale(struct megasas_register_set __iomem * regs)
240 {
241 	u32 mask = 0x1f;
242 	writel(mask, &regs->outbound_intr_mask);
243 	/* Dummy readl to force pci flush */
244 	readl(&regs->outbound_intr_mask);
245 }
246 
247 /**
248  * megasas_read_fw_status_reg_xscale - returns the current FW status value
249  * @regs:			MFI register set
250  */
251 static u32
252 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
253 {
254 	return readl(&(regs)->outbound_msg_0);
255 }
256 /**
257  * megasas_clear_interrupt_xscale -	Check & clear interrupt
258  * @regs:				MFI register set
259  */
260 static int
261 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
262 {
263 	u32 status;
264 	u32 mfiStatus = 0;
265 	/*
266 	 * Check if it is our interrupt
267 	 */
268 	status = readl(&regs->outbound_intr_status);
269 
270 	if (status & MFI_OB_INTR_STATUS_MASK)
271 		mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
272 	if (status & MFI_XSCALE_OMR0_CHANGE_INTERRUPT)
273 		mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
274 
275 	/*
276 	 * Clear the interrupt by writing back the same value
277 	 */
278 	if (mfiStatus)
279 		writel(status, &regs->outbound_intr_status);
280 
281 	/* Dummy readl to force pci flush */
282 	readl(&regs->outbound_intr_status);
283 
284 	return mfiStatus;
285 }
286 
287 /**
288  * megasas_fire_cmd_xscale -	Sends command to the FW
289  * @frame_phys_addr :		Physical address of cmd
290  * @frame_count :		Number of frames for the command
291  * @regs :			MFI register set
292  */
293 static inline void
294 megasas_fire_cmd_xscale(struct megasas_instance *instance,
295 		dma_addr_t frame_phys_addr,
296 		u32 frame_count,
297 		struct megasas_register_set __iomem *regs)
298 {
299 	unsigned long flags;
300 	spin_lock_irqsave(&instance->hba_lock, flags);
301 	writel((frame_phys_addr >> 3)|(frame_count),
302 	       &(regs)->inbound_queue_port);
303 	spin_unlock_irqrestore(&instance->hba_lock, flags);
304 }
305 
306 /**
307  * megasas_adp_reset_xscale -  For controller reset
308  * @regs:                              MFI register set
309  */
310 static int
311 megasas_adp_reset_xscale(struct megasas_instance *instance,
312 	struct megasas_register_set __iomem *regs)
313 {
314 	u32 i;
315 	u32 pcidata;
316 	writel(MFI_ADP_RESET, &regs->inbound_doorbell);
317 
318 	for (i = 0; i < 3; i++)
319 		msleep(1000); /* sleep for 3 secs */
320 	pcidata  = 0;
321 	pci_read_config_dword(instance->pdev, MFI_1068_PCSR_OFFSET, &pcidata);
322 	printk(KERN_NOTICE "pcidata = %x\n", pcidata);
323 	if (pcidata & 0x2) {
324 		printk(KERN_NOTICE "mfi 1068 offset read=%x\n", pcidata);
325 		pcidata &= ~0x2;
326 		pci_write_config_dword(instance->pdev,
327 				MFI_1068_PCSR_OFFSET, pcidata);
328 
329 		for (i = 0; i < 2; i++)
330 			msleep(1000); /* need to wait 2 secs again */
331 
332 		pcidata  = 0;
333 		pci_read_config_dword(instance->pdev,
334 				MFI_1068_FW_HANDSHAKE_OFFSET, &pcidata);
335 		printk(KERN_NOTICE "1068 offset handshake read=%x\n", pcidata);
336 		if ((pcidata & 0xffff0000) == MFI_1068_FW_READY) {
337 			printk(KERN_NOTICE "1068 offset pcidt=%x\n", pcidata);
338 			pcidata = 0;
339 			pci_write_config_dword(instance->pdev,
340 				MFI_1068_FW_HANDSHAKE_OFFSET, pcidata);
341 		}
342 	}
343 	return 0;
344 }
345 
346 /**
347  * megasas_check_reset_xscale -	For controller reset check
348  * @regs:				MFI register set
349  */
350 static int
351 megasas_check_reset_xscale(struct megasas_instance *instance,
352 		struct megasas_register_set __iomem *regs)
353 {
354 	u32 consumer;
355 	consumer = *instance->consumer;
356 
357 	if ((instance->adprecovery != MEGASAS_HBA_OPERATIONAL) &&
358 		(*instance->consumer == MEGASAS_ADPRESET_INPROG_SIGN)) {
359 		return 1;
360 	}
361 	return 0;
362 }
363 
364 static struct megasas_instance_template megasas_instance_template_xscale = {
365 
366 	.fire_cmd = megasas_fire_cmd_xscale,
367 	.enable_intr = megasas_enable_intr_xscale,
368 	.disable_intr = megasas_disable_intr_xscale,
369 	.clear_intr = megasas_clear_intr_xscale,
370 	.read_fw_status_reg = megasas_read_fw_status_reg_xscale,
371 	.adp_reset = megasas_adp_reset_xscale,
372 	.check_reset = megasas_check_reset_xscale,
373 	.service_isr = megasas_isr,
374 	.tasklet = megasas_complete_cmd_dpc,
375 	.init_adapter = megasas_init_adapter_mfi,
376 	.build_and_issue_cmd = megasas_build_and_issue_cmd,
377 	.issue_dcmd = megasas_issue_dcmd,
378 };
379 
380 /**
381 *	This is the end of set of functions & definitions specific
382 *	to xscale (deviceid : 1064R, PERC5) controllers
383 */
384 
385 /**
386 *	The following functions are defined for ppc (deviceid : 0x60)
387 * 	controllers
388 */
389 
390 /**
391  * megasas_enable_intr_ppc -	Enables interrupts
392  * @regs:			MFI register set
393  */
394 static inline void
395 megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs)
396 {
397 	writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
398 
399 	writel(~0x80000000, &(regs)->outbound_intr_mask);
400 
401 	/* Dummy readl to force pci flush */
402 	readl(&regs->outbound_intr_mask);
403 }
404 
405 /**
406  * megasas_disable_intr_ppc -	Disable interrupt
407  * @regs:			MFI register set
408  */
409 static inline void
410 megasas_disable_intr_ppc(struct megasas_register_set __iomem * regs)
411 {
412 	u32 mask = 0xFFFFFFFF;
413 	writel(mask, &regs->outbound_intr_mask);
414 	/* Dummy readl to force pci flush */
415 	readl(&regs->outbound_intr_mask);
416 }
417 
418 /**
419  * megasas_read_fw_status_reg_ppc - returns the current FW status value
420  * @regs:			MFI register set
421  */
422 static u32
423 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
424 {
425 	return readl(&(regs)->outbound_scratch_pad);
426 }
427 
428 /**
429  * megasas_clear_interrupt_ppc -	Check & clear interrupt
430  * @regs:				MFI register set
431  */
432 static int
433 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
434 {
435 	u32 status;
436 	/*
437 	 * Check if it is our interrupt
438 	 */
439 	status = readl(&regs->outbound_intr_status);
440 
441 	if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) {
442 		return 0;
443 	}
444 
445 	/*
446 	 * Clear the interrupt by writing back the same value
447 	 */
448 	writel(status, &regs->outbound_doorbell_clear);
449 
450 	/* Dummy readl to force pci flush */
451 	readl(&regs->outbound_doorbell_clear);
452 
453 	return 1;
454 }
455 /**
456  * megasas_fire_cmd_ppc -	Sends command to the FW
457  * @frame_phys_addr :		Physical address of cmd
458  * @frame_count :		Number of frames for the command
459  * @regs :			MFI register set
460  */
461 static inline void
462 megasas_fire_cmd_ppc(struct megasas_instance *instance,
463 		dma_addr_t frame_phys_addr,
464 		u32 frame_count,
465 		struct megasas_register_set __iomem *regs)
466 {
467 	unsigned long flags;
468 	spin_lock_irqsave(&instance->hba_lock, flags);
469 	writel((frame_phys_addr | (frame_count<<1))|1,
470 			&(regs)->inbound_queue_port);
471 	spin_unlock_irqrestore(&instance->hba_lock, flags);
472 }
473 
474 /**
475  * megasas_adp_reset_ppc -	For controller reset
476  * @regs:				MFI register set
477  */
478 static int
479 megasas_adp_reset_ppc(struct megasas_instance *instance,
480 			struct megasas_register_set __iomem *regs)
481 {
482 	return 0;
483 }
484 
485 /**
486  * megasas_check_reset_ppc -	For controller reset check
487  * @regs:				MFI register set
488  */
489 static int
490 megasas_check_reset_ppc(struct megasas_instance *instance,
491 			struct megasas_register_set __iomem *regs)
492 {
493 	return 0;
494 }
495 static struct megasas_instance_template megasas_instance_template_ppc = {
496 
497 	.fire_cmd = megasas_fire_cmd_ppc,
498 	.enable_intr = megasas_enable_intr_ppc,
499 	.disable_intr = megasas_disable_intr_ppc,
500 	.clear_intr = megasas_clear_intr_ppc,
501 	.read_fw_status_reg = megasas_read_fw_status_reg_ppc,
502 	.adp_reset = megasas_adp_reset_ppc,
503 	.check_reset = megasas_check_reset_ppc,
504 	.service_isr = megasas_isr,
505 	.tasklet = megasas_complete_cmd_dpc,
506 	.init_adapter = megasas_init_adapter_mfi,
507 	.build_and_issue_cmd = megasas_build_and_issue_cmd,
508 	.issue_dcmd = megasas_issue_dcmd,
509 };
510 
511 /**
512  * megasas_enable_intr_skinny -	Enables interrupts
513  * @regs:			MFI register set
514  */
515 static inline void
516 megasas_enable_intr_skinny(struct megasas_register_set __iomem *regs)
517 {
518 	writel(0xFFFFFFFF, &(regs)->outbound_intr_mask);
519 
520 	writel(~MFI_SKINNY_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
521 
522 	/* Dummy readl to force pci flush */
523 	readl(&regs->outbound_intr_mask);
524 }
525 
526 /**
527  * megasas_disable_intr_skinny -	Disables interrupt
528  * @regs:			MFI register set
529  */
530 static inline void
531 megasas_disable_intr_skinny(struct megasas_register_set __iomem *regs)
532 {
533 	u32 mask = 0xFFFFFFFF;
534 	writel(mask, &regs->outbound_intr_mask);
535 	/* Dummy readl to force pci flush */
536 	readl(&regs->outbound_intr_mask);
537 }
538 
539 /**
540  * megasas_read_fw_status_reg_skinny - returns the current FW status value
541  * @regs:			MFI register set
542  */
543 static u32
544 megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
545 {
546 	return readl(&(regs)->outbound_scratch_pad);
547 }
548 
549 /**
550  * megasas_clear_interrupt_skinny -	Check & clear interrupt
551  * @regs:				MFI register set
552  */
553 static int
554 megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
555 {
556 	u32 status;
557 	/*
558 	 * Check if it is our interrupt
559 	 */
560 	status = readl(&regs->outbound_intr_status);
561 
562 	if (!(status & MFI_SKINNY_ENABLE_INTERRUPT_MASK)) {
563 		return 0;
564 	}
565 
566 	/*
567 	 * Clear the interrupt by writing back the same value
568 	 */
569 	writel(status, &regs->outbound_intr_status);
570 
571 	/*
572 	* dummy read to flush PCI
573 	*/
574 	readl(&regs->outbound_intr_status);
575 
576 	return 1;
577 }
578 
579 /**
580  * megasas_fire_cmd_skinny -	Sends command to the FW
581  * @frame_phys_addr :		Physical address of cmd
582  * @frame_count :		Number of frames for the command
583  * @regs :			MFI register set
584  */
585 static inline void
586 megasas_fire_cmd_skinny(struct megasas_instance *instance,
587 			dma_addr_t frame_phys_addr,
588 			u32 frame_count,
589 			struct megasas_register_set __iomem *regs)
590 {
591 	unsigned long flags;
592 	spin_lock_irqsave(&instance->hba_lock, flags);
593 	writel(0, &(regs)->inbound_high_queue_port);
594 	writel((frame_phys_addr | (frame_count<<1))|1,
595 		&(regs)->inbound_low_queue_port);
596 	spin_unlock_irqrestore(&instance->hba_lock, flags);
597 }
598 
599 /**
600  * megasas_adp_reset_skinny -	For controller reset
601  * @regs:				MFI register set
602  */
603 static int
604 megasas_adp_reset_skinny(struct megasas_instance *instance,
605 			struct megasas_register_set __iomem *regs)
606 {
607 	return 0;
608 }
609 
610 /**
611  * megasas_check_reset_skinny -	For controller reset check
612  * @regs:				MFI register set
613  */
614 static int
615 megasas_check_reset_skinny(struct megasas_instance *instance,
616 				struct megasas_register_set __iomem *regs)
617 {
618 	return 0;
619 }
620 
621 static struct megasas_instance_template megasas_instance_template_skinny = {
622 
623 	.fire_cmd = megasas_fire_cmd_skinny,
624 	.enable_intr = megasas_enable_intr_skinny,
625 	.disable_intr = megasas_disable_intr_skinny,
626 	.clear_intr = megasas_clear_intr_skinny,
627 	.read_fw_status_reg = megasas_read_fw_status_reg_skinny,
628 	.adp_reset = megasas_adp_reset_skinny,
629 	.check_reset = megasas_check_reset_skinny,
630 	.service_isr = megasas_isr,
631 	.tasklet = megasas_complete_cmd_dpc,
632 	.init_adapter = megasas_init_adapter_mfi,
633 	.build_and_issue_cmd = megasas_build_and_issue_cmd,
634 	.issue_dcmd = megasas_issue_dcmd,
635 };
636 
637 
638 /**
639 *	The following functions are defined for gen2 (deviceid : 0x78 0x79)
640 *	controllers
641 */
642 
643 /**
644  * megasas_enable_intr_gen2 -  Enables interrupts
645  * @regs:                      MFI register set
646  */
647 static inline void
648 megasas_enable_intr_gen2(struct megasas_register_set __iomem *regs)
649 {
650 	writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
651 
652 	/* write ~0x00000005 (4 & 1) to the intr mask*/
653 	writel(~MFI_GEN2_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
654 
655 	/* Dummy readl to force pci flush */
656 	readl(&regs->outbound_intr_mask);
657 }
658 
659 /**
660  * megasas_disable_intr_gen2 - Disables interrupt
661  * @regs:                      MFI register set
662  */
663 static inline void
664 megasas_disable_intr_gen2(struct megasas_register_set __iomem *regs)
665 {
666 	u32 mask = 0xFFFFFFFF;
667 	writel(mask, &regs->outbound_intr_mask);
668 	/* Dummy readl to force pci flush */
669 	readl(&regs->outbound_intr_mask);
670 }
671 
672 /**
673  * megasas_read_fw_status_reg_gen2 - returns the current FW status value
674  * @regs:                      MFI register set
675  */
676 static u32
677 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
678 {
679 	return readl(&(regs)->outbound_scratch_pad);
680 }
681 
682 /**
683  * megasas_clear_interrupt_gen2 -      Check & clear interrupt
684  * @regs:                              MFI register set
685  */
686 static int
687 megasas_clear_intr_gen2(struct megasas_register_set __iomem *regs)
688 {
689 	u32 status;
690 	u32 mfiStatus = 0;
691 	/*
692 	 * Check if it is our interrupt
693 	 */
694 	status = readl(&regs->outbound_intr_status);
695 
696 	if (status & MFI_GEN2_ENABLE_INTERRUPT_MASK) {
697 		mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
698 	}
699 	if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT) {
700 		mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
701 	}
702 
703 	/*
704 	 * Clear the interrupt by writing back the same value
705 	 */
706 	if (mfiStatus)
707 		writel(status, &regs->outbound_doorbell_clear);
708 
709 	/* Dummy readl to force pci flush */
710 	readl(&regs->outbound_intr_status);
711 
712 	return mfiStatus;
713 }
714 /**
715  * megasas_fire_cmd_gen2 -     Sends command to the FW
716  * @frame_phys_addr :          Physical address of cmd
717  * @frame_count :              Number of frames for the command
718  * @regs :                     MFI register set
719  */
720 static inline void
721 megasas_fire_cmd_gen2(struct megasas_instance *instance,
722 			dma_addr_t frame_phys_addr,
723 			u32 frame_count,
724 			struct megasas_register_set __iomem *regs)
725 {
726 	unsigned long flags;
727 	spin_lock_irqsave(&instance->hba_lock, flags);
728 	writel((frame_phys_addr | (frame_count<<1))|1,
729 			&(regs)->inbound_queue_port);
730 	spin_unlock_irqrestore(&instance->hba_lock, flags);
731 }
732 
733 /**
734  * megasas_adp_reset_gen2 -	For controller reset
735  * @regs:				MFI register set
736  */
737 static int
738 megasas_adp_reset_gen2(struct megasas_instance *instance,
739 			struct megasas_register_set __iomem *reg_set)
740 {
741 	u32			retry = 0 ;
742 	u32			HostDiag;
743 
744 	writel(0, &reg_set->seq_offset);
745 	writel(4, &reg_set->seq_offset);
746 	writel(0xb, &reg_set->seq_offset);
747 	writel(2, &reg_set->seq_offset);
748 	writel(7, &reg_set->seq_offset);
749 	writel(0xd, &reg_set->seq_offset);
750 	msleep(1000);
751 
752 	HostDiag = (u32)readl(&reg_set->host_diag);
753 
754 	while ( !( HostDiag & DIAG_WRITE_ENABLE) ) {
755 		msleep(100);
756 		HostDiag = (u32)readl(&reg_set->host_diag);
757 		printk(KERN_NOTICE "RESETGEN2: retry=%x, hostdiag=%x\n",
758 					retry, HostDiag);
759 
760 		if (retry++ >= 100)
761 			return 1;
762 
763 	}
764 
765 	printk(KERN_NOTICE "ADP_RESET_GEN2: HostDiag=%x\n", HostDiag);
766 
767 	writel((HostDiag | DIAG_RESET_ADAPTER), &reg_set->host_diag);
768 
769 	ssleep(10);
770 
771 	HostDiag = (u32)readl(&reg_set->host_diag);
772 	while ( ( HostDiag & DIAG_RESET_ADAPTER) ) {
773 		msleep(100);
774 		HostDiag = (u32)readl(&reg_set->host_diag);
775 		printk(KERN_NOTICE "RESET_GEN2: retry=%x, hostdiag=%x\n",
776 				retry, HostDiag);
777 
778 		if (retry++ >= 1000)
779 			return 1;
780 
781 	}
782 	return 0;
783 }
784 
785 /**
786  * megasas_check_reset_gen2 -	For controller reset check
787  * @regs:				MFI register set
788  */
789 static int
790 megasas_check_reset_gen2(struct megasas_instance *instance,
791 		struct megasas_register_set __iomem *regs)
792 {
793 	if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
794 		return 1;
795 	}
796 
797 	return 0;
798 }
799 
800 static struct megasas_instance_template megasas_instance_template_gen2 = {
801 
802 	.fire_cmd = megasas_fire_cmd_gen2,
803 	.enable_intr = megasas_enable_intr_gen2,
804 	.disable_intr = megasas_disable_intr_gen2,
805 	.clear_intr = megasas_clear_intr_gen2,
806 	.read_fw_status_reg = megasas_read_fw_status_reg_gen2,
807 	.adp_reset = megasas_adp_reset_gen2,
808 	.check_reset = megasas_check_reset_gen2,
809 	.service_isr = megasas_isr,
810 	.tasklet = megasas_complete_cmd_dpc,
811 	.init_adapter = megasas_init_adapter_mfi,
812 	.build_and_issue_cmd = megasas_build_and_issue_cmd,
813 	.issue_dcmd = megasas_issue_dcmd,
814 };
815 
816 /**
817 *	This is the end of set of functions & definitions
818 *       specific to gen2 (deviceid : 0x78, 0x79) controllers
819 */
820 
821 /*
822  * Template added for TB (Fusion)
823  */
824 extern struct megasas_instance_template megasas_instance_template_fusion;
825 
826 /**
827  * megasas_issue_polled -	Issues a polling command
828  * @instance:			Adapter soft state
829  * @cmd:			Command packet to be issued
830  *
831  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
832  */
833 int
834 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
835 {
836 
837 	struct megasas_header *frame_hdr = &cmd->frame->hdr;
838 
839 	frame_hdr->cmd_status = 0xFF;
840 	frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
841 
842 	/*
843 	 * Issue the frame using inbound queue port
844 	 */
845 	instance->instancet->issue_dcmd(instance, cmd);
846 
847 	/*
848 	 * Wait for cmd_status to change
849 	 */
850 	return wait_and_poll(instance, cmd);
851 }
852 
853 /**
854  * megasas_issue_blocked_cmd -	Synchronous wrapper around regular FW cmds
855  * @instance:			Adapter soft state
856  * @cmd:			Command to be issued
857  *
858  * This function waits on an event for the command to be returned from ISR.
859  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
860  * Used to issue ioctl commands.
861  */
862 static int
863 megasas_issue_blocked_cmd(struct megasas_instance *instance,
864 			  struct megasas_cmd *cmd)
865 {
866 	cmd->cmd_status = ENODATA;
867 
868 	instance->instancet->issue_dcmd(instance, cmd);
869 
870 	wait_event(instance->int_cmd_wait_q, cmd->cmd_status != ENODATA);
871 
872 	return 0;
873 }
874 
875 /**
876  * megasas_issue_blocked_abort_cmd -	Aborts previously issued cmd
877  * @instance:				Adapter soft state
878  * @cmd_to_abort:			Previously issued cmd to be aborted
879  *
880  * MFI firmware can abort previously issued AEN comamnd (automatic event
881  * notification). The megasas_issue_blocked_abort_cmd() issues such abort
882  * cmd and waits for return status.
883  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
884  */
885 static int
886 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
887 				struct megasas_cmd *cmd_to_abort)
888 {
889 	struct megasas_cmd *cmd;
890 	struct megasas_abort_frame *abort_fr;
891 
892 	cmd = megasas_get_cmd(instance);
893 
894 	if (!cmd)
895 		return -1;
896 
897 	abort_fr = &cmd->frame->abort;
898 
899 	/*
900 	 * Prepare and issue the abort frame
901 	 */
902 	abort_fr->cmd = MFI_CMD_ABORT;
903 	abort_fr->cmd_status = 0xFF;
904 	abort_fr->flags = 0;
905 	abort_fr->abort_context = cmd_to_abort->index;
906 	abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
907 	abort_fr->abort_mfi_phys_addr_hi = 0;
908 
909 	cmd->sync_cmd = 1;
910 	cmd->cmd_status = 0xFF;
911 
912 	instance->instancet->issue_dcmd(instance, cmd);
913 
914 	/*
915 	 * Wait for this cmd to complete
916 	 */
917 	wait_event(instance->abort_cmd_wait_q, cmd->cmd_status != 0xFF);
918 	cmd->sync_cmd = 0;
919 
920 	megasas_return_cmd(instance, cmd);
921 	return 0;
922 }
923 
924 /**
925  * megasas_make_sgl32 -	Prepares 32-bit SGL
926  * @instance:		Adapter soft state
927  * @scp:		SCSI command from the mid-layer
928  * @mfi_sgl:		SGL to be filled in
929  *
930  * If successful, this function returns the number of SG elements. Otherwise,
931  * it returnes -1.
932  */
933 static int
934 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
935 		   union megasas_sgl *mfi_sgl)
936 {
937 	int i;
938 	int sge_count;
939 	struct scatterlist *os_sgl;
940 
941 	sge_count = scsi_dma_map(scp);
942 	BUG_ON(sge_count < 0);
943 
944 	if (sge_count) {
945 		scsi_for_each_sg(scp, os_sgl, sge_count, i) {
946 			mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
947 			mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
948 		}
949 	}
950 	return sge_count;
951 }
952 
953 /**
954  * megasas_make_sgl64 -	Prepares 64-bit SGL
955  * @instance:		Adapter soft state
956  * @scp:		SCSI command from the mid-layer
957  * @mfi_sgl:		SGL to be filled in
958  *
959  * If successful, this function returns the number of SG elements. Otherwise,
960  * it returnes -1.
961  */
962 static int
963 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
964 		   union megasas_sgl *mfi_sgl)
965 {
966 	int i;
967 	int sge_count;
968 	struct scatterlist *os_sgl;
969 
970 	sge_count = scsi_dma_map(scp);
971 	BUG_ON(sge_count < 0);
972 
973 	if (sge_count) {
974 		scsi_for_each_sg(scp, os_sgl, sge_count, i) {
975 			mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
976 			mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
977 		}
978 	}
979 	return sge_count;
980 }
981 
982 /**
983  * megasas_make_sgl_skinny - Prepares IEEE SGL
984  * @instance:           Adapter soft state
985  * @scp:                SCSI command from the mid-layer
986  * @mfi_sgl:            SGL to be filled in
987  *
988  * If successful, this function returns the number of SG elements. Otherwise,
989  * it returnes -1.
990  */
991 static int
992 megasas_make_sgl_skinny(struct megasas_instance *instance,
993 		struct scsi_cmnd *scp, union megasas_sgl *mfi_sgl)
994 {
995 	int i;
996 	int sge_count;
997 	struct scatterlist *os_sgl;
998 
999 	sge_count = scsi_dma_map(scp);
1000 
1001 	if (sge_count) {
1002 		scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1003 			mfi_sgl->sge_skinny[i].length = sg_dma_len(os_sgl);
1004 			mfi_sgl->sge_skinny[i].phys_addr =
1005 						sg_dma_address(os_sgl);
1006 			mfi_sgl->sge_skinny[i].flag = 0;
1007 		}
1008 	}
1009 	return sge_count;
1010 }
1011 
1012  /**
1013  * megasas_get_frame_count - Computes the number of frames
1014  * @frame_type		: type of frame- io or pthru frame
1015  * @sge_count		: number of sg elements
1016  *
1017  * Returns the number of frames required for numnber of sge's (sge_count)
1018  */
1019 
1020 static u32 megasas_get_frame_count(struct megasas_instance *instance,
1021 			u8 sge_count, u8 frame_type)
1022 {
1023 	int num_cnt;
1024 	int sge_bytes;
1025 	u32 sge_sz;
1026 	u32 frame_count=0;
1027 
1028 	sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1029 	    sizeof(struct megasas_sge32);
1030 
1031 	if (instance->flag_ieee) {
1032 		sge_sz = sizeof(struct megasas_sge_skinny);
1033 	}
1034 
1035 	/*
1036 	 * Main frame can contain 2 SGEs for 64-bit SGLs and
1037 	 * 3 SGEs for 32-bit SGLs for ldio &
1038 	 * 1 SGEs for 64-bit SGLs and
1039 	 * 2 SGEs for 32-bit SGLs for pthru frame
1040 	 */
1041 	if (unlikely(frame_type == PTHRU_FRAME)) {
1042 		if (instance->flag_ieee == 1) {
1043 			num_cnt = sge_count - 1;
1044 		} else if (IS_DMA64)
1045 			num_cnt = sge_count - 1;
1046 		else
1047 			num_cnt = sge_count - 2;
1048 	} else {
1049 		if (instance->flag_ieee == 1) {
1050 			num_cnt = sge_count - 1;
1051 		} else if (IS_DMA64)
1052 			num_cnt = sge_count - 2;
1053 		else
1054 			num_cnt = sge_count - 3;
1055 	}
1056 
1057 	if(num_cnt>0){
1058 		sge_bytes = sge_sz * num_cnt;
1059 
1060 		frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
1061 		    ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
1062 	}
1063 	/* Main frame */
1064 	frame_count +=1;
1065 
1066 	if (frame_count > 7)
1067 		frame_count = 8;
1068 	return frame_count;
1069 }
1070 
1071 /**
1072  * megasas_build_dcdb -	Prepares a direct cdb (DCDB) command
1073  * @instance:		Adapter soft state
1074  * @scp:		SCSI command
1075  * @cmd:		Command to be prepared in
1076  *
1077  * This function prepares CDB commands. These are typcially pass-through
1078  * commands to the devices.
1079  */
1080 static int
1081 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
1082 		   struct megasas_cmd *cmd)
1083 {
1084 	u32 is_logical;
1085 	u32 device_id;
1086 	u16 flags = 0;
1087 	struct megasas_pthru_frame *pthru;
1088 
1089 	is_logical = MEGASAS_IS_LOGICAL(scp);
1090 	device_id = MEGASAS_DEV_INDEX(instance, scp);
1091 	pthru = (struct megasas_pthru_frame *)cmd->frame;
1092 
1093 	if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1094 		flags = MFI_FRAME_DIR_WRITE;
1095 	else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1096 		flags = MFI_FRAME_DIR_READ;
1097 	else if (scp->sc_data_direction == PCI_DMA_NONE)
1098 		flags = MFI_FRAME_DIR_NONE;
1099 
1100 	if (instance->flag_ieee == 1) {
1101 		flags |= MFI_FRAME_IEEE;
1102 	}
1103 
1104 	/*
1105 	 * Prepare the DCDB frame
1106 	 */
1107 	pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
1108 	pthru->cmd_status = 0x0;
1109 	pthru->scsi_status = 0x0;
1110 	pthru->target_id = device_id;
1111 	pthru->lun = scp->device->lun;
1112 	pthru->cdb_len = scp->cmd_len;
1113 	pthru->timeout = 0;
1114 	pthru->pad_0 = 0;
1115 	pthru->flags = flags;
1116 	pthru->data_xfer_len = scsi_bufflen(scp);
1117 
1118 	memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1119 
1120 	/*
1121 	* If the command is for the tape device, set the
1122 	* pthru timeout to the os layer timeout value.
1123 	*/
1124 	if (scp->device->type == TYPE_TAPE) {
1125 		if ((scp->request->timeout / HZ) > 0xFFFF)
1126 			pthru->timeout = 0xFFFF;
1127 		else
1128 			pthru->timeout = scp->request->timeout / HZ;
1129 	}
1130 
1131 	/*
1132 	 * Construct SGL
1133 	 */
1134 	if (instance->flag_ieee == 1) {
1135 		pthru->flags |= MFI_FRAME_SGL64;
1136 		pthru->sge_count = megasas_make_sgl_skinny(instance, scp,
1137 						      &pthru->sgl);
1138 	} else if (IS_DMA64) {
1139 		pthru->flags |= MFI_FRAME_SGL64;
1140 		pthru->sge_count = megasas_make_sgl64(instance, scp,
1141 						      &pthru->sgl);
1142 	} else
1143 		pthru->sge_count = megasas_make_sgl32(instance, scp,
1144 						      &pthru->sgl);
1145 
1146 	if (pthru->sge_count > instance->max_num_sge) {
1147 		printk(KERN_ERR "megasas: DCDB two many SGE NUM=%x\n",
1148 			pthru->sge_count);
1149 		return 0;
1150 	}
1151 
1152 	/*
1153 	 * Sense info specific
1154 	 */
1155 	pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
1156 	pthru->sense_buf_phys_addr_hi = 0;
1157 	pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
1158 
1159 	/*
1160 	 * Compute the total number of frames this command consumes. FW uses
1161 	 * this number to pull sufficient number of frames from host memory.
1162 	 */
1163 	cmd->frame_count = megasas_get_frame_count(instance, pthru->sge_count,
1164 							PTHRU_FRAME);
1165 
1166 	return cmd->frame_count;
1167 }
1168 
1169 /**
1170  * megasas_build_ldio -	Prepares IOs to logical devices
1171  * @instance:		Adapter soft state
1172  * @scp:		SCSI command
1173  * @cmd:		Command to be prepared
1174  *
1175  * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
1176  */
1177 static int
1178 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
1179 		   struct megasas_cmd *cmd)
1180 {
1181 	u32 device_id;
1182 	u8 sc = scp->cmnd[0];
1183 	u16 flags = 0;
1184 	struct megasas_io_frame *ldio;
1185 
1186 	device_id = MEGASAS_DEV_INDEX(instance, scp);
1187 	ldio = (struct megasas_io_frame *)cmd->frame;
1188 
1189 	if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1190 		flags = MFI_FRAME_DIR_WRITE;
1191 	else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1192 		flags = MFI_FRAME_DIR_READ;
1193 
1194 	if (instance->flag_ieee == 1) {
1195 		flags |= MFI_FRAME_IEEE;
1196 	}
1197 
1198 	/*
1199 	 * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
1200 	 */
1201 	ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
1202 	ldio->cmd_status = 0x0;
1203 	ldio->scsi_status = 0x0;
1204 	ldio->target_id = device_id;
1205 	ldio->timeout = 0;
1206 	ldio->reserved_0 = 0;
1207 	ldio->pad_0 = 0;
1208 	ldio->flags = flags;
1209 	ldio->start_lba_hi = 0;
1210 	ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
1211 
1212 	/*
1213 	 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1214 	 */
1215 	if (scp->cmd_len == 6) {
1216 		ldio->lba_count = (u32) scp->cmnd[4];
1217 		ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
1218 		    ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
1219 
1220 		ldio->start_lba_lo &= 0x1FFFFF;
1221 	}
1222 
1223 	/*
1224 	 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1225 	 */
1226 	else if (scp->cmd_len == 10) {
1227 		ldio->lba_count = (u32) scp->cmnd[8] |
1228 		    ((u32) scp->cmnd[7] << 8);
1229 		ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1230 		    ((u32) scp->cmnd[3] << 16) |
1231 		    ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1232 	}
1233 
1234 	/*
1235 	 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1236 	 */
1237 	else if (scp->cmd_len == 12) {
1238 		ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
1239 		    ((u32) scp->cmnd[7] << 16) |
1240 		    ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1241 
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 	 * 16-byte READ(0x88) or WRITE(0x8A) cdb
1249 	 */
1250 	else if (scp->cmd_len == 16) {
1251 		ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
1252 		    ((u32) scp->cmnd[11] << 16) |
1253 		    ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
1254 
1255 		ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
1256 		    ((u32) scp->cmnd[7] << 16) |
1257 		    ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1258 
1259 		ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
1260 		    ((u32) scp->cmnd[3] << 16) |
1261 		    ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1262 
1263 	}
1264 
1265 	/*
1266 	 * Construct SGL
1267 	 */
1268 	if (instance->flag_ieee) {
1269 		ldio->flags |= MFI_FRAME_SGL64;
1270 		ldio->sge_count = megasas_make_sgl_skinny(instance, scp,
1271 					      &ldio->sgl);
1272 	} else if (IS_DMA64) {
1273 		ldio->flags |= MFI_FRAME_SGL64;
1274 		ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
1275 	} else
1276 		ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
1277 
1278 	if (ldio->sge_count > instance->max_num_sge) {
1279 		printk(KERN_ERR "megasas: build_ld_io: sge_count = %x\n",
1280 			ldio->sge_count);
1281 		return 0;
1282 	}
1283 
1284 	/*
1285 	 * Sense info specific
1286 	 */
1287 	ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
1288 	ldio->sense_buf_phys_addr_hi = 0;
1289 	ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
1290 
1291 	/*
1292 	 * Compute the total number of frames this command consumes. FW uses
1293 	 * this number to pull sufficient number of frames from host memory.
1294 	 */
1295 	cmd->frame_count = megasas_get_frame_count(instance,
1296 			ldio->sge_count, IO_FRAME);
1297 
1298 	return cmd->frame_count;
1299 }
1300 
1301 /**
1302  * megasas_is_ldio -		Checks if the cmd is for logical drive
1303  * @scmd:			SCSI command
1304  *
1305  * Called by megasas_queue_command to find out if the command to be queued
1306  * is a logical drive command
1307  */
1308 inline int megasas_is_ldio(struct scsi_cmnd *cmd)
1309 {
1310 	if (!MEGASAS_IS_LOGICAL(cmd))
1311 		return 0;
1312 	switch (cmd->cmnd[0]) {
1313 	case READ_10:
1314 	case WRITE_10:
1315 	case READ_12:
1316 	case WRITE_12:
1317 	case READ_6:
1318 	case WRITE_6:
1319 	case READ_16:
1320 	case WRITE_16:
1321 		return 1;
1322 	default:
1323 		return 0;
1324 	}
1325 }
1326 
1327  /**
1328  * megasas_dump_pending_frames -	Dumps the frame address of all pending cmds
1329  *                              	in FW
1330  * @instance:				Adapter soft state
1331  */
1332 static inline void
1333 megasas_dump_pending_frames(struct megasas_instance *instance)
1334 {
1335 	struct megasas_cmd *cmd;
1336 	int i,n;
1337 	union megasas_sgl *mfi_sgl;
1338 	struct megasas_io_frame *ldio;
1339 	struct megasas_pthru_frame *pthru;
1340 	u32 sgcount;
1341 	u32 max_cmd = instance->max_fw_cmds;
1342 
1343 	printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
1344 	printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
1345 	if (IS_DMA64)
1346 		printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
1347 	else
1348 		printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
1349 
1350 	printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
1351 	for (i = 0; i < max_cmd; i++) {
1352 		cmd = instance->cmd_list[i];
1353 		if(!cmd->scmd)
1354 			continue;
1355 		printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
1356 		if (megasas_is_ldio(cmd->scmd)){
1357 			ldio = (struct megasas_io_frame *)cmd->frame;
1358 			mfi_sgl = &ldio->sgl;
1359 			sgcount = ldio->sge_count;
1360 			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);
1361 		}
1362 		else {
1363 			pthru = (struct megasas_pthru_frame *) cmd->frame;
1364 			mfi_sgl = &pthru->sgl;
1365 			sgcount = pthru->sge_count;
1366 			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);
1367 		}
1368 	if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
1369 		for (n = 0; n < sgcount; n++){
1370 			if (IS_DMA64)
1371 				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) ;
1372 			else
1373 				printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl->sge32[n].length , mfi_sgl->sge32[n].phys_addr) ;
1374 			}
1375 		}
1376 		printk(KERN_ERR "\n");
1377 	} /*for max_cmd*/
1378 	printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
1379 	for (i = 0; i < max_cmd; i++) {
1380 
1381 		cmd = instance->cmd_list[i];
1382 
1383 		if(cmd->sync_cmd == 1){
1384 			printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
1385 		}
1386 	}
1387 	printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
1388 }
1389 
1390 u32
1391 megasas_build_and_issue_cmd(struct megasas_instance *instance,
1392 			    struct scsi_cmnd *scmd)
1393 {
1394 	struct megasas_cmd *cmd;
1395 	u32 frame_count;
1396 
1397 	cmd = megasas_get_cmd(instance);
1398 	if (!cmd)
1399 		return SCSI_MLQUEUE_HOST_BUSY;
1400 
1401 	/*
1402 	 * Logical drive command
1403 	 */
1404 	if (megasas_is_ldio(scmd))
1405 		frame_count = megasas_build_ldio(instance, scmd, cmd);
1406 	else
1407 		frame_count = megasas_build_dcdb(instance, scmd, cmd);
1408 
1409 	if (!frame_count)
1410 		goto out_return_cmd;
1411 
1412 	cmd->scmd = scmd;
1413 	scmd->SCp.ptr = (char *)cmd;
1414 
1415 	/*
1416 	 * Issue the command to the FW
1417 	 */
1418 	atomic_inc(&instance->fw_outstanding);
1419 
1420 	instance->instancet->fire_cmd(instance, cmd->frame_phys_addr,
1421 				cmd->frame_count-1, instance->reg_set);
1422 	/*
1423 	 * Check if we have pend cmds to be completed
1424 	 */
1425 	if (poll_mode_io && atomic_read(&instance->fw_outstanding))
1426 		tasklet_schedule(&instance->isr_tasklet);
1427 
1428 	return 0;
1429 out_return_cmd:
1430 	megasas_return_cmd(instance, cmd);
1431 	return 1;
1432 }
1433 
1434 
1435 /**
1436  * megasas_queue_command -	Queue entry point
1437  * @scmd:			SCSI command to be queued
1438  * @done:			Callback entry point
1439  */
1440 static int
1441 megasas_queue_command_lck(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
1442 {
1443 	struct megasas_instance *instance;
1444 	unsigned long flags;
1445 
1446 	instance = (struct megasas_instance *)
1447 	    scmd->device->host->hostdata;
1448 
1449 	if (instance->issuepend_done == 0)
1450 		return SCSI_MLQUEUE_HOST_BUSY;
1451 
1452 	spin_lock_irqsave(&instance->hba_lock, flags);
1453 	if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
1454 		spin_unlock_irqrestore(&instance->hba_lock, flags);
1455 		return SCSI_MLQUEUE_HOST_BUSY;
1456 	}
1457 
1458 	spin_unlock_irqrestore(&instance->hba_lock, flags);
1459 
1460 	scmd->scsi_done = done;
1461 	scmd->result = 0;
1462 
1463 	if (MEGASAS_IS_LOGICAL(scmd) &&
1464 	    (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
1465 		scmd->result = DID_BAD_TARGET << 16;
1466 		goto out_done;
1467 	}
1468 
1469 	switch (scmd->cmnd[0]) {
1470 	case SYNCHRONIZE_CACHE:
1471 		/*
1472 		 * FW takes care of flush cache on its own
1473 		 * No need to send it down
1474 		 */
1475 		scmd->result = DID_OK << 16;
1476 		goto out_done;
1477 	default:
1478 		break;
1479 	}
1480 
1481 	if (instance->instancet->build_and_issue_cmd(instance, scmd)) {
1482 		printk(KERN_ERR "megasas: Err returned from build_and_issue_cmd\n");
1483 		return SCSI_MLQUEUE_HOST_BUSY;
1484 	}
1485 
1486 	return 0;
1487 
1488  out_done:
1489 	done(scmd);
1490 	return 0;
1491 }
1492 
1493 static DEF_SCSI_QCMD(megasas_queue_command)
1494 
1495 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
1496 {
1497 	int i;
1498 
1499 	for (i = 0; i < megasas_mgmt_info.max_index; i++) {
1500 
1501 		if ((megasas_mgmt_info.instance[i]) &&
1502 		    (megasas_mgmt_info.instance[i]->host->host_no == host_no))
1503 			return megasas_mgmt_info.instance[i];
1504 	}
1505 
1506 	return NULL;
1507 }
1508 
1509 static int megasas_slave_configure(struct scsi_device *sdev)
1510 {
1511 	u16             pd_index = 0;
1512 	struct  megasas_instance *instance ;
1513 
1514 	instance = megasas_lookup_instance(sdev->host->host_no);
1515 
1516 	/*
1517 	* Don't export physical disk devices to the disk driver.
1518 	*
1519 	* FIXME: Currently we don't export them to the midlayer at all.
1520 	*        That will be fixed once LSI engineers have audited the
1521 	*        firmware for possible issues.
1522 	*/
1523 	if (sdev->channel < MEGASAS_MAX_PD_CHANNELS &&
1524 				sdev->type == TYPE_DISK) {
1525 		pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
1526 								sdev->id;
1527 		if (instance->pd_list[pd_index].driveState ==
1528 						MR_PD_STATE_SYSTEM) {
1529 			blk_queue_rq_timeout(sdev->request_queue,
1530 				MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
1531 			return 0;
1532 		}
1533 		return -ENXIO;
1534 	}
1535 
1536 	/*
1537 	* The RAID firmware may require extended timeouts.
1538 	*/
1539 	blk_queue_rq_timeout(sdev->request_queue,
1540 		MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
1541 	return 0;
1542 }
1543 
1544 static int megasas_slave_alloc(struct scsi_device *sdev)
1545 {
1546 	u16             pd_index = 0;
1547 	struct megasas_instance *instance ;
1548 	instance = megasas_lookup_instance(sdev->host->host_no);
1549 	if ((sdev->channel < MEGASAS_MAX_PD_CHANNELS) &&
1550 				(sdev->type == TYPE_DISK)) {
1551 		/*
1552 		 * Open the OS scan to the SYSTEM PD
1553 		 */
1554 		pd_index =
1555 			(sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
1556 			sdev->id;
1557 		if ((instance->pd_list[pd_index].driveState ==
1558 					MR_PD_STATE_SYSTEM) &&
1559 			(instance->pd_list[pd_index].driveType ==
1560 						TYPE_DISK)) {
1561 			return 0;
1562 		}
1563 		return -ENXIO;
1564 	}
1565 	return 0;
1566 }
1567 
1568 void megaraid_sas_kill_hba(struct megasas_instance *instance)
1569 {
1570 	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1571 	    (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
1572 	    (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)) {
1573 		writel(MFI_STOP_ADP, &instance->reg_set->doorbell);
1574 	} else {
1575 		writel(MFI_STOP_ADP, &instance->reg_set->inbound_doorbell);
1576 	}
1577 }
1578 
1579  /**
1580   * megasas_check_and_restore_queue_depth - Check if queue depth needs to be
1581   *					restored to max value
1582   * @instance:			Adapter soft state
1583   *
1584   */
1585 void
1586 megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
1587 {
1588 	unsigned long flags;
1589 	if (instance->flag & MEGASAS_FW_BUSY
1590 		&& time_after(jiffies, instance->last_time + 5 * HZ)
1591 		&& atomic_read(&instance->fw_outstanding) < 17) {
1592 
1593 		spin_lock_irqsave(instance->host->host_lock, flags);
1594 		instance->flag &= ~MEGASAS_FW_BUSY;
1595 		if ((instance->pdev->device ==
1596 			PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1597 			(instance->pdev->device ==
1598 			PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
1599 			instance->host->can_queue =
1600 				instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
1601 		} else
1602 			instance->host->can_queue =
1603 				instance->max_fw_cmds - MEGASAS_INT_CMDS;
1604 
1605 		spin_unlock_irqrestore(instance->host->host_lock, flags);
1606 	}
1607 }
1608 
1609 /**
1610  * megasas_complete_cmd_dpc	 -	Returns FW's controller structure
1611  * @instance_addr:			Address of adapter soft state
1612  *
1613  * Tasklet to complete cmds
1614  */
1615 static void megasas_complete_cmd_dpc(unsigned long instance_addr)
1616 {
1617 	u32 producer;
1618 	u32 consumer;
1619 	u32 context;
1620 	struct megasas_cmd *cmd;
1621 	struct megasas_instance *instance =
1622 				(struct megasas_instance *)instance_addr;
1623 	unsigned long flags;
1624 
1625 	/* If we have already declared adapter dead, donot complete cmds */
1626 	if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR )
1627 		return;
1628 
1629 	spin_lock_irqsave(&instance->completion_lock, flags);
1630 
1631 	producer = *instance->producer;
1632 	consumer = *instance->consumer;
1633 
1634 	while (consumer != producer) {
1635 		context = instance->reply_queue[consumer];
1636 		if (context >= instance->max_fw_cmds) {
1637 			printk(KERN_ERR "Unexpected context value %x\n",
1638 				context);
1639 			BUG();
1640 		}
1641 
1642 		cmd = instance->cmd_list[context];
1643 
1644 		megasas_complete_cmd(instance, cmd, DID_OK);
1645 
1646 		consumer++;
1647 		if (consumer == (instance->max_fw_cmds + 1)) {
1648 			consumer = 0;
1649 		}
1650 	}
1651 
1652 	*instance->consumer = producer;
1653 
1654 	spin_unlock_irqrestore(&instance->completion_lock, flags);
1655 
1656 	/*
1657 	 * Check if we can restore can_queue
1658 	 */
1659 	megasas_check_and_restore_queue_depth(instance);
1660 }
1661 
1662 static void
1663 megasas_internal_reset_defer_cmds(struct megasas_instance *instance);
1664 
1665 static void
1666 process_fw_state_change_wq(struct work_struct *work);
1667 
1668 void megasas_do_ocr(struct megasas_instance *instance)
1669 {
1670 	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
1671 	(instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
1672 	(instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
1673 		*instance->consumer     = MEGASAS_ADPRESET_INPROG_SIGN;
1674 	}
1675 	instance->instancet->disable_intr(instance->reg_set);
1676 	instance->adprecovery   = MEGASAS_ADPRESET_SM_INFAULT;
1677 	instance->issuepend_done = 0;
1678 
1679 	atomic_set(&instance->fw_outstanding, 0);
1680 	megasas_internal_reset_defer_cmds(instance);
1681 	process_fw_state_change_wq(&instance->work_init);
1682 }
1683 
1684 /**
1685  * megasas_wait_for_outstanding -	Wait for all outstanding cmds
1686  * @instance:				Adapter soft state
1687  *
1688  * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
1689  * complete all its outstanding commands. Returns error if one or more IOs
1690  * are pending after this time period. It also marks the controller dead.
1691  */
1692 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
1693 {
1694 	int i;
1695 	u32 reset_index;
1696 	u32 wait_time = MEGASAS_RESET_WAIT_TIME;
1697 	u8 adprecovery;
1698 	unsigned long flags;
1699 	struct list_head clist_local;
1700 	struct megasas_cmd *reset_cmd;
1701 	u32 fw_state;
1702 	u8 kill_adapter_flag;
1703 
1704 	spin_lock_irqsave(&instance->hba_lock, flags);
1705 	adprecovery = instance->adprecovery;
1706 	spin_unlock_irqrestore(&instance->hba_lock, flags);
1707 
1708 	if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
1709 
1710 		INIT_LIST_HEAD(&clist_local);
1711 		spin_lock_irqsave(&instance->hba_lock, flags);
1712 		list_splice_init(&instance->internal_reset_pending_q,
1713 				&clist_local);
1714 		spin_unlock_irqrestore(&instance->hba_lock, flags);
1715 
1716 		printk(KERN_NOTICE "megasas: HBA reset wait ...\n");
1717 		for (i = 0; i < wait_time; i++) {
1718 			msleep(1000);
1719 			spin_lock_irqsave(&instance->hba_lock, flags);
1720 			adprecovery = instance->adprecovery;
1721 			spin_unlock_irqrestore(&instance->hba_lock, flags);
1722 			if (adprecovery == MEGASAS_HBA_OPERATIONAL)
1723 				break;
1724 		}
1725 
1726 		if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
1727 			printk(KERN_NOTICE "megasas: reset: Stopping HBA.\n");
1728 			spin_lock_irqsave(&instance->hba_lock, flags);
1729 			instance->adprecovery	= MEGASAS_HW_CRITICAL_ERROR;
1730 			spin_unlock_irqrestore(&instance->hba_lock, flags);
1731 			return FAILED;
1732 		}
1733 
1734 		reset_index	= 0;
1735 		while (!list_empty(&clist_local)) {
1736 			reset_cmd	= list_entry((&clist_local)->next,
1737 						struct megasas_cmd, list);
1738 			list_del_init(&reset_cmd->list);
1739 			if (reset_cmd->scmd) {
1740 				reset_cmd->scmd->result = DID_RESET << 16;
1741 				printk(KERN_NOTICE "%d:%p reset [%02x], %#lx\n",
1742 					reset_index, reset_cmd,
1743 					reset_cmd->scmd->cmnd[0],
1744 					reset_cmd->scmd->serial_number);
1745 
1746 				reset_cmd->scmd->scsi_done(reset_cmd->scmd);
1747 				megasas_return_cmd(instance, reset_cmd);
1748 			} else if (reset_cmd->sync_cmd) {
1749 				printk(KERN_NOTICE "megasas:%p synch cmds"
1750 						"reset queue\n",
1751 						reset_cmd);
1752 
1753 				reset_cmd->cmd_status = ENODATA;
1754 				instance->instancet->fire_cmd(instance,
1755 						reset_cmd->frame_phys_addr,
1756 						0, instance->reg_set);
1757 			} else {
1758 				printk(KERN_NOTICE "megasas: %p unexpected"
1759 					"cmds lst\n",
1760 					reset_cmd);
1761 			}
1762 			reset_index++;
1763 		}
1764 
1765 		return SUCCESS;
1766 	}
1767 
1768 	for (i = 0; i < wait_time; i++) {
1769 
1770 		int outstanding = atomic_read(&instance->fw_outstanding);
1771 
1772 		if (!outstanding)
1773 			break;
1774 
1775 		if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
1776 			printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
1777 			       "commands to complete\n",i,outstanding);
1778 			/*
1779 			 * Call cmd completion routine. Cmd to be
1780 			 * be completed directly without depending on isr.
1781 			 */
1782 			megasas_complete_cmd_dpc((unsigned long)instance);
1783 		}
1784 
1785 		msleep(1000);
1786 	}
1787 
1788 	i = 0;
1789 	kill_adapter_flag = 0;
1790 	do {
1791 		fw_state = instance->instancet->read_fw_status_reg(
1792 					instance->reg_set) & MFI_STATE_MASK;
1793 		if ((fw_state == MFI_STATE_FAULT) &&
1794 			(instance->disableOnlineCtrlReset == 0)) {
1795 			if (i == 3) {
1796 				kill_adapter_flag = 2;
1797 				break;
1798 			}
1799 			megasas_do_ocr(instance);
1800 			kill_adapter_flag = 1;
1801 
1802 			/* wait for 1 secs to let FW finish the pending cmds */
1803 			msleep(1000);
1804 		}
1805 		i++;
1806 	} while (i <= 3);
1807 
1808 	if (atomic_read(&instance->fw_outstanding) &&
1809 					!kill_adapter_flag) {
1810 		if (instance->disableOnlineCtrlReset == 0) {
1811 
1812 			megasas_do_ocr(instance);
1813 
1814 			/* wait for 5 secs to let FW finish the pending cmds */
1815 			for (i = 0; i < wait_time; i++) {
1816 				int outstanding =
1817 					atomic_read(&instance->fw_outstanding);
1818 				if (!outstanding)
1819 					return SUCCESS;
1820 				msleep(1000);
1821 			}
1822 		}
1823 	}
1824 
1825 	if (atomic_read(&instance->fw_outstanding) ||
1826 					(kill_adapter_flag == 2)) {
1827 		printk(KERN_NOTICE "megaraid_sas: pending cmds after reset\n");
1828 		/*
1829 		* Send signal to FW to stop processing any pending cmds.
1830 		* The controller will be taken offline by the OS now.
1831 		*/
1832 		if ((instance->pdev->device ==
1833 			PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1834 			(instance->pdev->device ==
1835 			PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
1836 			writel(MFI_STOP_ADP,
1837 				&instance->reg_set->doorbell);
1838 		} else {
1839 			writel(MFI_STOP_ADP,
1840 				&instance->reg_set->inbound_doorbell);
1841 		}
1842 		megasas_dump_pending_frames(instance);
1843 		spin_lock_irqsave(&instance->hba_lock, flags);
1844 		instance->adprecovery	= MEGASAS_HW_CRITICAL_ERROR;
1845 		spin_unlock_irqrestore(&instance->hba_lock, flags);
1846 		return FAILED;
1847 	}
1848 
1849 	printk(KERN_NOTICE "megaraid_sas: no pending cmds after reset\n");
1850 
1851 	return SUCCESS;
1852 }
1853 
1854 /**
1855  * megasas_generic_reset -	Generic reset routine
1856  * @scmd:			Mid-layer SCSI command
1857  *
1858  * This routine implements a generic reset handler for device, bus and host
1859  * reset requests. Device, bus and host specific reset handlers can use this
1860  * function after they do their specific tasks.
1861  */
1862 static int megasas_generic_reset(struct scsi_cmnd *scmd)
1863 {
1864 	int ret_val;
1865 	struct megasas_instance *instance;
1866 
1867 	instance = (struct megasas_instance *)scmd->device->host->hostdata;
1868 
1869 	scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x retries=%x\n",
1870 		 scmd->serial_number, scmd->cmnd[0], scmd->retries);
1871 
1872 	if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
1873 		printk(KERN_ERR "megasas: cannot recover from previous reset "
1874 		       "failures\n");
1875 		return FAILED;
1876 	}
1877 
1878 	ret_val = megasas_wait_for_outstanding(instance);
1879 	if (ret_val == SUCCESS)
1880 		printk(KERN_NOTICE "megasas: reset successful \n");
1881 	else
1882 		printk(KERN_ERR "megasas: failed to do reset\n");
1883 
1884 	return ret_val;
1885 }
1886 
1887 /**
1888  * megasas_reset_timer - quiesce the adapter if required
1889  * @scmd:		scsi cmnd
1890  *
1891  * Sets the FW busy flag and reduces the host->can_queue if the
1892  * cmd has not been completed within the timeout period.
1893  */
1894 static enum
1895 blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
1896 {
1897 	struct megasas_cmd *cmd = (struct megasas_cmd *)scmd->SCp.ptr;
1898 	struct megasas_instance *instance;
1899 	unsigned long flags;
1900 
1901 	if (time_after(jiffies, scmd->jiffies_at_alloc +
1902 				(MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
1903 		return BLK_EH_NOT_HANDLED;
1904 	}
1905 
1906 	instance = cmd->instance;
1907 	if (!(instance->flag & MEGASAS_FW_BUSY)) {
1908 		/* FW is busy, throttle IO */
1909 		spin_lock_irqsave(instance->host->host_lock, flags);
1910 
1911 		instance->host->can_queue = 16;
1912 		instance->last_time = jiffies;
1913 		instance->flag |= MEGASAS_FW_BUSY;
1914 
1915 		spin_unlock_irqrestore(instance->host->host_lock, flags);
1916 	}
1917 	return BLK_EH_RESET_TIMER;
1918 }
1919 
1920 /**
1921  * megasas_reset_device -	Device reset handler entry point
1922  */
1923 static int megasas_reset_device(struct scsi_cmnd *scmd)
1924 {
1925 	int ret;
1926 
1927 	/*
1928 	 * First wait for all commands to complete
1929 	 */
1930 	ret = megasas_generic_reset(scmd);
1931 
1932 	return ret;
1933 }
1934 
1935 /**
1936  * megasas_reset_bus_host -	Bus & host reset handler entry point
1937  */
1938 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
1939 {
1940 	int ret;
1941 	struct megasas_instance *instance;
1942 	instance = (struct megasas_instance *)scmd->device->host->hostdata;
1943 
1944 	/*
1945 	 * First wait for all commands to complete
1946 	 */
1947 	if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)
1948 		ret = megasas_reset_fusion(scmd->device->host);
1949 	else
1950 		ret = megasas_generic_reset(scmd);
1951 
1952 	return ret;
1953 }
1954 
1955 /**
1956  * megasas_bios_param - Returns disk geometry for a disk
1957  * @sdev: 		device handle
1958  * @bdev:		block device
1959  * @capacity:		drive capacity
1960  * @geom:		geometry parameters
1961  */
1962 static int
1963 megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
1964 		 sector_t capacity, int geom[])
1965 {
1966 	int heads;
1967 	int sectors;
1968 	sector_t cylinders;
1969 	unsigned long tmp;
1970 	/* Default heads (64) & sectors (32) */
1971 	heads = 64;
1972 	sectors = 32;
1973 
1974 	tmp = heads * sectors;
1975 	cylinders = capacity;
1976 
1977 	sector_div(cylinders, tmp);
1978 
1979 	/*
1980 	 * Handle extended translation size for logical drives > 1Gb
1981 	 */
1982 
1983 	if (capacity >= 0x200000) {
1984 		heads = 255;
1985 		sectors = 63;
1986 		tmp = heads*sectors;
1987 		cylinders = capacity;
1988 		sector_div(cylinders, tmp);
1989 	}
1990 
1991 	geom[0] = heads;
1992 	geom[1] = sectors;
1993 	geom[2] = cylinders;
1994 
1995 	return 0;
1996 }
1997 
1998 static void megasas_aen_polling(struct work_struct *work);
1999 
2000 /**
2001  * megasas_service_aen -	Processes an event notification
2002  * @instance:			Adapter soft state
2003  * @cmd:			AEN command completed by the ISR
2004  *
2005  * For AEN, driver sends a command down to FW that is held by the FW till an
2006  * event occurs. When an event of interest occurs, FW completes the command
2007  * that it was previously holding.
2008  *
2009  * This routines sends SIGIO signal to processes that have registered with the
2010  * driver for AEN.
2011  */
2012 static void
2013 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
2014 {
2015 	unsigned long flags;
2016 	/*
2017 	 * Don't signal app if it is just an aborted previously registered aen
2018 	 */
2019 	if ((!cmd->abort_aen) && (instance->unload == 0)) {
2020 		spin_lock_irqsave(&poll_aen_lock, flags);
2021 		megasas_poll_wait_aen = 1;
2022 		spin_unlock_irqrestore(&poll_aen_lock, flags);
2023 		wake_up(&megasas_poll_wait);
2024 		kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
2025 	}
2026 	else
2027 		cmd->abort_aen = 0;
2028 
2029 	instance->aen_cmd = NULL;
2030 	megasas_return_cmd(instance, cmd);
2031 
2032 	if ((instance->unload == 0) &&
2033 		((instance->issuepend_done == 1))) {
2034 		struct megasas_aen_event *ev;
2035 		ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
2036 		if (!ev) {
2037 			printk(KERN_ERR "megasas_service_aen: out of memory\n");
2038 		} else {
2039 			ev->instance = instance;
2040 			instance->ev = ev;
2041 			INIT_WORK(&ev->hotplug_work, megasas_aen_polling);
2042 			schedule_delayed_work(
2043 				(struct delayed_work *)&ev->hotplug_work, 0);
2044 		}
2045 	}
2046 }
2047 
2048 /*
2049  * Scsi host template for megaraid_sas driver
2050  */
2051 static struct scsi_host_template megasas_template = {
2052 
2053 	.module = THIS_MODULE,
2054 	.name = "LSI SAS based MegaRAID driver",
2055 	.proc_name = "megaraid_sas",
2056 	.slave_configure = megasas_slave_configure,
2057 	.slave_alloc = megasas_slave_alloc,
2058 	.queuecommand = megasas_queue_command,
2059 	.eh_device_reset_handler = megasas_reset_device,
2060 	.eh_bus_reset_handler = megasas_reset_bus_host,
2061 	.eh_host_reset_handler = megasas_reset_bus_host,
2062 	.eh_timed_out = megasas_reset_timer,
2063 	.bios_param = megasas_bios_param,
2064 	.use_clustering = ENABLE_CLUSTERING,
2065 };
2066 
2067 /**
2068  * megasas_complete_int_cmd -	Completes an internal command
2069  * @instance:			Adapter soft state
2070  * @cmd:			Command to be completed
2071  *
2072  * The megasas_issue_blocked_cmd() function waits for a command to complete
2073  * after it issues a command. This function wakes up that waiting routine by
2074  * calling wake_up() on the wait queue.
2075  */
2076 static void
2077 megasas_complete_int_cmd(struct megasas_instance *instance,
2078 			 struct megasas_cmd *cmd)
2079 {
2080 	cmd->cmd_status = cmd->frame->io.cmd_status;
2081 
2082 	if (cmd->cmd_status == ENODATA) {
2083 		cmd->cmd_status = 0;
2084 	}
2085 	wake_up(&instance->int_cmd_wait_q);
2086 }
2087 
2088 /**
2089  * megasas_complete_abort -	Completes aborting a command
2090  * @instance:			Adapter soft state
2091  * @cmd:			Cmd that was issued to abort another cmd
2092  *
2093  * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
2094  * after it issues an abort on a previously issued command. This function
2095  * wakes up all functions waiting on the same wait queue.
2096  */
2097 static void
2098 megasas_complete_abort(struct megasas_instance *instance,
2099 		       struct megasas_cmd *cmd)
2100 {
2101 	if (cmd->sync_cmd) {
2102 		cmd->sync_cmd = 0;
2103 		cmd->cmd_status = 0;
2104 		wake_up(&instance->abort_cmd_wait_q);
2105 	}
2106 
2107 	return;
2108 }
2109 
2110 /**
2111  * megasas_complete_cmd -	Completes a command
2112  * @instance:			Adapter soft state
2113  * @cmd:			Command to be completed
2114  * @alt_status:			If non-zero, use this value as status to
2115  * 				SCSI mid-layer instead of the value returned
2116  * 				by the FW. This should be used if caller wants
2117  * 				an alternate status (as in the case of aborted
2118  * 				commands)
2119  */
2120 void
2121 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
2122 		     u8 alt_status)
2123 {
2124 	int exception = 0;
2125 	struct megasas_header *hdr = &cmd->frame->hdr;
2126 	unsigned long flags;
2127 	struct fusion_context *fusion = instance->ctrl_context;
2128 
2129 	/* flag for the retry reset */
2130 	cmd->retry_for_fw_reset = 0;
2131 
2132 	if (cmd->scmd)
2133 		cmd->scmd->SCp.ptr = NULL;
2134 
2135 	switch (hdr->cmd) {
2136 
2137 	case MFI_CMD_PD_SCSI_IO:
2138 	case MFI_CMD_LD_SCSI_IO:
2139 
2140 		/*
2141 		 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
2142 		 * issued either through an IO path or an IOCTL path. If it
2143 		 * was via IOCTL, we will send it to internal completion.
2144 		 */
2145 		if (cmd->sync_cmd) {
2146 			cmd->sync_cmd = 0;
2147 			megasas_complete_int_cmd(instance, cmd);
2148 			break;
2149 		}
2150 
2151 	case MFI_CMD_LD_READ:
2152 	case MFI_CMD_LD_WRITE:
2153 
2154 		if (alt_status) {
2155 			cmd->scmd->result = alt_status << 16;
2156 			exception = 1;
2157 		}
2158 
2159 		if (exception) {
2160 
2161 			atomic_dec(&instance->fw_outstanding);
2162 
2163 			scsi_dma_unmap(cmd->scmd);
2164 			cmd->scmd->scsi_done(cmd->scmd);
2165 			megasas_return_cmd(instance, cmd);
2166 
2167 			break;
2168 		}
2169 
2170 		switch (hdr->cmd_status) {
2171 
2172 		case MFI_STAT_OK:
2173 			cmd->scmd->result = DID_OK << 16;
2174 			break;
2175 
2176 		case MFI_STAT_SCSI_IO_FAILED:
2177 		case MFI_STAT_LD_INIT_IN_PROGRESS:
2178 			cmd->scmd->result =
2179 			    (DID_ERROR << 16) | hdr->scsi_status;
2180 			break;
2181 
2182 		case MFI_STAT_SCSI_DONE_WITH_ERROR:
2183 
2184 			cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
2185 
2186 			if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
2187 				memset(cmd->scmd->sense_buffer, 0,
2188 				       SCSI_SENSE_BUFFERSIZE);
2189 				memcpy(cmd->scmd->sense_buffer, cmd->sense,
2190 				       hdr->sense_len);
2191 
2192 				cmd->scmd->result |= DRIVER_SENSE << 24;
2193 			}
2194 
2195 			break;
2196 
2197 		case MFI_STAT_LD_OFFLINE:
2198 		case MFI_STAT_DEVICE_NOT_FOUND:
2199 			cmd->scmd->result = DID_BAD_TARGET << 16;
2200 			break;
2201 
2202 		default:
2203 			printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
2204 			       hdr->cmd_status);
2205 			cmd->scmd->result = DID_ERROR << 16;
2206 			break;
2207 		}
2208 
2209 		atomic_dec(&instance->fw_outstanding);
2210 
2211 		scsi_dma_unmap(cmd->scmd);
2212 		cmd->scmd->scsi_done(cmd->scmd);
2213 		megasas_return_cmd(instance, cmd);
2214 
2215 		break;
2216 
2217 	case MFI_CMD_SMP:
2218 	case MFI_CMD_STP:
2219 	case MFI_CMD_DCMD:
2220 		/* Check for LD map update */
2221 		if ((cmd->frame->dcmd.opcode == MR_DCMD_LD_MAP_GET_INFO) &&
2222 		    (cmd->frame->dcmd.mbox.b[1] == 1)) {
2223 			spin_lock_irqsave(instance->host->host_lock, flags);
2224 			if (cmd->frame->hdr.cmd_status != 0) {
2225 				if (cmd->frame->hdr.cmd_status !=
2226 				    MFI_STAT_NOT_FOUND)
2227 					printk(KERN_WARNING "megasas: map sync"
2228 					       "failed, status = 0x%x.\n",
2229 					       cmd->frame->hdr.cmd_status);
2230 				else {
2231 					megasas_return_cmd(instance, cmd);
2232 					spin_unlock_irqrestore(
2233 						instance->host->host_lock,
2234 						flags);
2235 					break;
2236 				}
2237 			} else
2238 				instance->map_id++;
2239 			megasas_return_cmd(instance, cmd);
2240 			if (MR_ValidateMapInfo(
2241 				    fusion->ld_map[(instance->map_id & 1)],
2242 				    fusion->load_balance_info))
2243 				fusion->fast_path_io = 1;
2244 			else
2245 				fusion->fast_path_io = 0;
2246 			megasas_sync_map_info(instance);
2247 			spin_unlock_irqrestore(instance->host->host_lock,
2248 					       flags);
2249 			break;
2250 		}
2251 		if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_GET_INFO ||
2252 			cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_GET) {
2253 			spin_lock_irqsave(&poll_aen_lock, flags);
2254 			megasas_poll_wait_aen = 0;
2255 			spin_unlock_irqrestore(&poll_aen_lock, flags);
2256 		}
2257 
2258 		/*
2259 		 * See if got an event notification
2260 		 */
2261 		if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
2262 			megasas_service_aen(instance, cmd);
2263 		else
2264 			megasas_complete_int_cmd(instance, cmd);
2265 
2266 		break;
2267 
2268 	case MFI_CMD_ABORT:
2269 		/*
2270 		 * Cmd issued to abort another cmd returned
2271 		 */
2272 		megasas_complete_abort(instance, cmd);
2273 		break;
2274 
2275 	default:
2276 		printk("megasas: Unknown command completed! [0x%X]\n",
2277 		       hdr->cmd);
2278 		break;
2279 	}
2280 }
2281 
2282 /**
2283  * megasas_issue_pending_cmds_again -	issue all pending cmds
2284  *                              	in FW again because of the fw reset
2285  * @instance:				Adapter soft state
2286  */
2287 static inline void
2288 megasas_issue_pending_cmds_again(struct megasas_instance *instance)
2289 {
2290 	struct megasas_cmd *cmd;
2291 	struct list_head clist_local;
2292 	union megasas_evt_class_locale class_locale;
2293 	unsigned long flags;
2294 	u32 seq_num;
2295 
2296 	INIT_LIST_HEAD(&clist_local);
2297 	spin_lock_irqsave(&instance->hba_lock, flags);
2298 	list_splice_init(&instance->internal_reset_pending_q, &clist_local);
2299 	spin_unlock_irqrestore(&instance->hba_lock, flags);
2300 
2301 	while (!list_empty(&clist_local)) {
2302 		cmd	= list_entry((&clist_local)->next,
2303 					struct megasas_cmd, list);
2304 		list_del_init(&cmd->list);
2305 
2306 		if (cmd->sync_cmd || cmd->scmd) {
2307 			printk(KERN_NOTICE "megaraid_sas: command %p, %p:%d"
2308 				"detected to be pending while HBA reset.\n",
2309 					cmd, cmd->scmd, cmd->sync_cmd);
2310 
2311 			cmd->retry_for_fw_reset++;
2312 
2313 			if (cmd->retry_for_fw_reset == 3) {
2314 				printk(KERN_NOTICE "megaraid_sas: cmd %p, %p:%d"
2315 					"was tried multiple times during reset."
2316 					"Shutting down the HBA\n",
2317 					cmd, cmd->scmd, cmd->sync_cmd);
2318 				megaraid_sas_kill_hba(instance);
2319 
2320 				instance->adprecovery =
2321 						MEGASAS_HW_CRITICAL_ERROR;
2322 				return;
2323 			}
2324 		}
2325 
2326 		if (cmd->sync_cmd == 1) {
2327 			if (cmd->scmd) {
2328 				printk(KERN_NOTICE "megaraid_sas: unexpected"
2329 					"cmd attached to internal command!\n");
2330 			}
2331 			printk(KERN_NOTICE "megasas: %p synchronous cmd"
2332 						"on the internal reset queue,"
2333 						"issue it again.\n", cmd);
2334 			cmd->cmd_status = ENODATA;
2335 			instance->instancet->fire_cmd(instance,
2336 							cmd->frame_phys_addr ,
2337 							0, instance->reg_set);
2338 		} else if (cmd->scmd) {
2339 			printk(KERN_NOTICE "megasas: %p scsi cmd [%02x],%#lx"
2340 			"detected on the internal queue, issue again.\n",
2341 			cmd, cmd->scmd->cmnd[0], cmd->scmd->serial_number);
2342 
2343 			atomic_inc(&instance->fw_outstanding);
2344 			instance->instancet->fire_cmd(instance,
2345 					cmd->frame_phys_addr,
2346 					cmd->frame_count-1, instance->reg_set);
2347 		} else {
2348 			printk(KERN_NOTICE "megasas: %p unexpected cmd on the"
2349 				"internal reset defer list while re-issue!!\n",
2350 				cmd);
2351 		}
2352 	}
2353 
2354 	if (instance->aen_cmd) {
2355 		printk(KERN_NOTICE "megaraid_sas: aen_cmd in def process\n");
2356 		megasas_return_cmd(instance, instance->aen_cmd);
2357 
2358 		instance->aen_cmd	= NULL;
2359 	}
2360 
2361 	/*
2362 	* Initiate AEN (Asynchronous Event Notification)
2363 	*/
2364 	seq_num = instance->last_seq_num;
2365 	class_locale.members.reserved = 0;
2366 	class_locale.members.locale = MR_EVT_LOCALE_ALL;
2367 	class_locale.members.class = MR_EVT_CLASS_DEBUG;
2368 
2369 	megasas_register_aen(instance, seq_num, class_locale.word);
2370 }
2371 
2372 /**
2373  * Move the internal reset pending commands to a deferred queue.
2374  *
2375  * We move the commands pending at internal reset time to a
2376  * pending queue. This queue would be flushed after successful
2377  * completion of the internal reset sequence. if the internal reset
2378  * did not complete in time, the kernel reset handler would flush
2379  * these commands.
2380  **/
2381 static void
2382 megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
2383 {
2384 	struct megasas_cmd *cmd;
2385 	int i;
2386 	u32 max_cmd = instance->max_fw_cmds;
2387 	u32 defer_index;
2388 	unsigned long flags;
2389 
2390 	defer_index     = 0;
2391 	spin_lock_irqsave(&instance->cmd_pool_lock, flags);
2392 	for (i = 0; i < max_cmd; i++) {
2393 		cmd = instance->cmd_list[i];
2394 		if (cmd->sync_cmd == 1 || cmd->scmd) {
2395 			printk(KERN_NOTICE "megasas: moving cmd[%d]:%p:%d:%p"
2396 					"on the defer queue as internal\n",
2397 				defer_index, cmd, cmd->sync_cmd, cmd->scmd);
2398 
2399 			if (!list_empty(&cmd->list)) {
2400 				printk(KERN_NOTICE "megaraid_sas: ERROR while"
2401 					" moving this cmd:%p, %d %p, it was"
2402 					"discovered on some list?\n",
2403 					cmd, cmd->sync_cmd, cmd->scmd);
2404 
2405 				list_del_init(&cmd->list);
2406 			}
2407 			defer_index++;
2408 			list_add_tail(&cmd->list,
2409 				&instance->internal_reset_pending_q);
2410 		}
2411 	}
2412 	spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
2413 }
2414 
2415 
2416 static void
2417 process_fw_state_change_wq(struct work_struct *work)
2418 {
2419 	struct megasas_instance *instance =
2420 		container_of(work, struct megasas_instance, work_init);
2421 	u32 wait;
2422 	unsigned long flags;
2423 
2424 	if (instance->adprecovery != MEGASAS_ADPRESET_SM_INFAULT) {
2425 		printk(KERN_NOTICE "megaraid_sas: error, recovery st %x \n",
2426 				instance->adprecovery);
2427 		return ;
2428 	}
2429 
2430 	if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
2431 		printk(KERN_NOTICE "megaraid_sas: FW detected to be in fault"
2432 					"state, restarting it...\n");
2433 
2434 		instance->instancet->disable_intr(instance->reg_set);
2435 		atomic_set(&instance->fw_outstanding, 0);
2436 
2437 		atomic_set(&instance->fw_reset_no_pci_access, 1);
2438 		instance->instancet->adp_reset(instance, instance->reg_set);
2439 		atomic_set(&instance->fw_reset_no_pci_access, 0 );
2440 
2441 		printk(KERN_NOTICE "megaraid_sas: FW restarted successfully,"
2442 					"initiating next stage...\n");
2443 
2444 		printk(KERN_NOTICE "megaraid_sas: HBA recovery state machine,"
2445 					"state 2 starting...\n");
2446 
2447 		/*waitting for about 20 second before start the second init*/
2448 		for (wait = 0; wait < 30; wait++) {
2449 			msleep(1000);
2450 		}
2451 
2452 		if (megasas_transition_to_ready(instance)) {
2453 			printk(KERN_NOTICE "megaraid_sas:adapter not ready\n");
2454 
2455 			megaraid_sas_kill_hba(instance);
2456 			instance->adprecovery	= MEGASAS_HW_CRITICAL_ERROR;
2457 			return ;
2458 		}
2459 
2460 		if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
2461 			(instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
2462 			(instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)
2463 			) {
2464 			*instance->consumer = *instance->producer;
2465 		} else {
2466 			*instance->consumer = 0;
2467 			*instance->producer = 0;
2468 		}
2469 
2470 		megasas_issue_init_mfi(instance);
2471 
2472 		spin_lock_irqsave(&instance->hba_lock, flags);
2473 		instance->adprecovery	= MEGASAS_HBA_OPERATIONAL;
2474 		spin_unlock_irqrestore(&instance->hba_lock, flags);
2475 		instance->instancet->enable_intr(instance->reg_set);
2476 
2477 		megasas_issue_pending_cmds_again(instance);
2478 		instance->issuepend_done = 1;
2479 	}
2480 	return ;
2481 }
2482 
2483 /**
2484  * megasas_deplete_reply_queue -	Processes all completed commands
2485  * @instance:				Adapter soft state
2486  * @alt_status:				Alternate status to be returned to
2487  * 					SCSI mid-layer instead of the status
2488  * 					returned by the FW
2489  * Note: this must be called with hba lock held
2490  */
2491 static int
2492 megasas_deplete_reply_queue(struct megasas_instance *instance,
2493 					u8 alt_status)
2494 {
2495 	u32 mfiStatus;
2496 	u32 fw_state;
2497 
2498 	if ((mfiStatus = instance->instancet->check_reset(instance,
2499 					instance->reg_set)) == 1) {
2500 		return IRQ_HANDLED;
2501 	}
2502 
2503 	if ((mfiStatus = instance->instancet->clear_intr(
2504 						instance->reg_set)
2505 						) == 0) {
2506 		return IRQ_NONE;
2507 	}
2508 
2509 	instance->mfiStatus = mfiStatus;
2510 
2511 	if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
2512 		fw_state = instance->instancet->read_fw_status_reg(
2513 				instance->reg_set) & MFI_STATE_MASK;
2514 
2515 		if (fw_state != MFI_STATE_FAULT) {
2516 			printk(KERN_NOTICE "megaraid_sas: fw state:%x\n",
2517 						fw_state);
2518 		}
2519 
2520 		if ((fw_state == MFI_STATE_FAULT) &&
2521 				(instance->disableOnlineCtrlReset == 0)) {
2522 			printk(KERN_NOTICE "megaraid_sas: wait adp restart\n");
2523 
2524 			if ((instance->pdev->device ==
2525 					PCI_DEVICE_ID_LSI_SAS1064R) ||
2526 				(instance->pdev->device ==
2527 					PCI_DEVICE_ID_DELL_PERC5) ||
2528 				(instance->pdev->device ==
2529 					PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
2530 
2531 				*instance->consumer =
2532 					MEGASAS_ADPRESET_INPROG_SIGN;
2533 			}
2534 
2535 
2536 			instance->instancet->disable_intr(instance->reg_set);
2537 			instance->adprecovery	= MEGASAS_ADPRESET_SM_INFAULT;
2538 			instance->issuepend_done = 0;
2539 
2540 			atomic_set(&instance->fw_outstanding, 0);
2541 			megasas_internal_reset_defer_cmds(instance);
2542 
2543 			printk(KERN_NOTICE "megasas: fwState=%x, stage:%d\n",
2544 					fw_state, instance->adprecovery);
2545 
2546 			schedule_work(&instance->work_init);
2547 			return IRQ_HANDLED;
2548 
2549 		} else {
2550 			printk(KERN_NOTICE "megasas: fwstate:%x, dis_OCR=%x\n",
2551 				fw_state, instance->disableOnlineCtrlReset);
2552 		}
2553 	}
2554 
2555 	tasklet_schedule(&instance->isr_tasklet);
2556 	return IRQ_HANDLED;
2557 }
2558 /**
2559  * megasas_isr - isr entry point
2560  */
2561 static irqreturn_t megasas_isr(int irq, void *devp)
2562 {
2563 	struct megasas_instance *instance;
2564 	unsigned long flags;
2565 	irqreturn_t	rc;
2566 
2567 	if (atomic_read(
2568 		&(((struct megasas_instance *)devp)->fw_reset_no_pci_access)))
2569 		return IRQ_HANDLED;
2570 
2571 	instance = (struct megasas_instance *)devp;
2572 
2573 	spin_lock_irqsave(&instance->hba_lock, flags);
2574 	rc =  megasas_deplete_reply_queue(instance, DID_OK);
2575 	spin_unlock_irqrestore(&instance->hba_lock, flags);
2576 
2577 	return rc;
2578 }
2579 
2580 /**
2581  * megasas_transition_to_ready -	Move the FW to READY state
2582  * @instance:				Adapter soft state
2583  *
2584  * During the initialization, FW passes can potentially be in any one of
2585  * several possible states. If the FW in operational, waiting-for-handshake
2586  * states, driver must take steps to bring it to ready state. Otherwise, it
2587  * has to wait for the ready state.
2588  */
2589 int
2590 megasas_transition_to_ready(struct megasas_instance* instance)
2591 {
2592 	int i;
2593 	u8 max_wait;
2594 	u32 fw_state;
2595 	u32 cur_state;
2596 	u32 abs_state, curr_abs_state;
2597 
2598 	fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
2599 
2600 	if (fw_state != MFI_STATE_READY)
2601 		printk(KERN_INFO "megasas: Waiting for FW to come to ready"
2602 		       " state\n");
2603 
2604 	while (fw_state != MFI_STATE_READY) {
2605 
2606 		abs_state =
2607 		instance->instancet->read_fw_status_reg(instance->reg_set);
2608 
2609 		switch (fw_state) {
2610 
2611 		case MFI_STATE_FAULT:
2612 
2613 			printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
2614 			return -ENODEV;
2615 
2616 		case MFI_STATE_WAIT_HANDSHAKE:
2617 			/*
2618 			 * Set the CLR bit in inbound doorbell
2619 			 */
2620 			if ((instance->pdev->device ==
2621 				PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2622 				(instance->pdev->device ==
2623 				 PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
2624 				(instance->pdev->device ==
2625 				 PCI_DEVICE_ID_LSI_FUSION)) {
2626 				writel(
2627 				  MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
2628 				  &instance->reg_set->doorbell);
2629 			} else {
2630 				writel(
2631 				    MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
2632 					&instance->reg_set->inbound_doorbell);
2633 			}
2634 
2635 			max_wait = MEGASAS_RESET_WAIT_TIME;
2636 			cur_state = MFI_STATE_WAIT_HANDSHAKE;
2637 			break;
2638 
2639 		case MFI_STATE_BOOT_MESSAGE_PENDING:
2640 			if ((instance->pdev->device ==
2641 			     PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2642 				(instance->pdev->device ==
2643 				 PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
2644 			    (instance->pdev->device ==
2645 			     PCI_DEVICE_ID_LSI_FUSION)) {
2646 				writel(MFI_INIT_HOTPLUG,
2647 				       &instance->reg_set->doorbell);
2648 			} else
2649 				writel(MFI_INIT_HOTPLUG,
2650 					&instance->reg_set->inbound_doorbell);
2651 
2652 			max_wait = MEGASAS_RESET_WAIT_TIME;
2653 			cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
2654 			break;
2655 
2656 		case MFI_STATE_OPERATIONAL:
2657 			/*
2658 			 * Bring it to READY state; assuming max wait 10 secs
2659 			 */
2660 			instance->instancet->disable_intr(instance->reg_set);
2661 			if ((instance->pdev->device ==
2662 				PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2663 				(instance->pdev->device ==
2664 				PCI_DEVICE_ID_LSI_SAS0071SKINNY)  ||
2665 				(instance->pdev->device
2666 					== PCI_DEVICE_ID_LSI_FUSION)) {
2667 				writel(MFI_RESET_FLAGS,
2668 					&instance->reg_set->doorbell);
2669 				if (instance->pdev->device ==
2670 				    PCI_DEVICE_ID_LSI_FUSION) {
2671 					for (i = 0; i < (10 * 1000); i += 20) {
2672 						if (readl(
2673 							    &instance->
2674 							    reg_set->
2675 							    doorbell) & 1)
2676 							msleep(20);
2677 						else
2678 							break;
2679 					}
2680 				}
2681 			} else
2682 				writel(MFI_RESET_FLAGS,
2683 					&instance->reg_set->inbound_doorbell);
2684 
2685 			max_wait = MEGASAS_RESET_WAIT_TIME;
2686 			cur_state = MFI_STATE_OPERATIONAL;
2687 			break;
2688 
2689 		case MFI_STATE_UNDEFINED:
2690 			/*
2691 			 * This state should not last for more than 2 seconds
2692 			 */
2693 			max_wait = MEGASAS_RESET_WAIT_TIME;
2694 			cur_state = MFI_STATE_UNDEFINED;
2695 			break;
2696 
2697 		case MFI_STATE_BB_INIT:
2698 			max_wait = MEGASAS_RESET_WAIT_TIME;
2699 			cur_state = MFI_STATE_BB_INIT;
2700 			break;
2701 
2702 		case MFI_STATE_FW_INIT:
2703 			max_wait = MEGASAS_RESET_WAIT_TIME;
2704 			cur_state = MFI_STATE_FW_INIT;
2705 			break;
2706 
2707 		case MFI_STATE_FW_INIT_2:
2708 			max_wait = MEGASAS_RESET_WAIT_TIME;
2709 			cur_state = MFI_STATE_FW_INIT_2;
2710 			break;
2711 
2712 		case MFI_STATE_DEVICE_SCAN:
2713 			max_wait = MEGASAS_RESET_WAIT_TIME;
2714 			cur_state = MFI_STATE_DEVICE_SCAN;
2715 			break;
2716 
2717 		case MFI_STATE_FLUSH_CACHE:
2718 			max_wait = MEGASAS_RESET_WAIT_TIME;
2719 			cur_state = MFI_STATE_FLUSH_CACHE;
2720 			break;
2721 
2722 		default:
2723 			printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
2724 			       fw_state);
2725 			return -ENODEV;
2726 		}
2727 
2728 		/*
2729 		 * The cur_state should not last for more than max_wait secs
2730 		 */
2731 		for (i = 0; i < (max_wait * 1000); i++) {
2732 			fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
2733 					MFI_STATE_MASK ;
2734 		curr_abs_state =
2735 		instance->instancet->read_fw_status_reg(instance->reg_set);
2736 
2737 			if (abs_state == curr_abs_state) {
2738 				msleep(1);
2739 			} else
2740 				break;
2741 		}
2742 
2743 		/*
2744 		 * Return error if fw_state hasn't changed after max_wait
2745 		 */
2746 		if (curr_abs_state == abs_state) {
2747 			printk(KERN_DEBUG "FW state [%d] hasn't changed "
2748 			       "in %d secs\n", fw_state, max_wait);
2749 			return -ENODEV;
2750 		}
2751 	}
2752 	printk(KERN_INFO "megasas: FW now in Ready state\n");
2753 
2754 	return 0;
2755 }
2756 
2757 /**
2758  * megasas_teardown_frame_pool -	Destroy the cmd frame DMA pool
2759  * @instance:				Adapter soft state
2760  */
2761 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
2762 {
2763 	int i;
2764 	u32 max_cmd = instance->max_mfi_cmds;
2765 	struct megasas_cmd *cmd;
2766 
2767 	if (!instance->frame_dma_pool)
2768 		return;
2769 
2770 	/*
2771 	 * Return all frames to pool
2772 	 */
2773 	for (i = 0; i < max_cmd; i++) {
2774 
2775 		cmd = instance->cmd_list[i];
2776 
2777 		if (cmd->frame)
2778 			pci_pool_free(instance->frame_dma_pool, cmd->frame,
2779 				      cmd->frame_phys_addr);
2780 
2781 		if (cmd->sense)
2782 			pci_pool_free(instance->sense_dma_pool, cmd->sense,
2783 				      cmd->sense_phys_addr);
2784 	}
2785 
2786 	/*
2787 	 * Now destroy the pool itself
2788 	 */
2789 	pci_pool_destroy(instance->frame_dma_pool);
2790 	pci_pool_destroy(instance->sense_dma_pool);
2791 
2792 	instance->frame_dma_pool = NULL;
2793 	instance->sense_dma_pool = NULL;
2794 }
2795 
2796 /**
2797  * megasas_create_frame_pool -	Creates DMA pool for cmd frames
2798  * @instance:			Adapter soft state
2799  *
2800  * Each command packet has an embedded DMA memory buffer that is used for
2801  * filling MFI frame and the SG list that immediately follows the frame. This
2802  * function creates those DMA memory buffers for each command packet by using
2803  * PCI pool facility.
2804  */
2805 static int megasas_create_frame_pool(struct megasas_instance *instance)
2806 {
2807 	int i;
2808 	u32 max_cmd;
2809 	u32 sge_sz;
2810 	u32 sgl_sz;
2811 	u32 total_sz;
2812 	u32 frame_count;
2813 	struct megasas_cmd *cmd;
2814 
2815 	max_cmd = instance->max_mfi_cmds;
2816 
2817 	/*
2818 	 * Size of our frame is 64 bytes for MFI frame, followed by max SG
2819 	 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
2820 	 */
2821 	sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
2822 	    sizeof(struct megasas_sge32);
2823 
2824 	if (instance->flag_ieee) {
2825 		sge_sz = sizeof(struct megasas_sge_skinny);
2826 	}
2827 
2828 	/*
2829 	 * Calculated the number of 64byte frames required for SGL
2830 	 */
2831 	sgl_sz = sge_sz * instance->max_num_sge;
2832 	frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
2833 	frame_count = 15;
2834 
2835 	/*
2836 	 * We need one extra frame for the MFI command
2837 	 */
2838 	frame_count++;
2839 
2840 	total_sz = MEGAMFI_FRAME_SIZE * frame_count;
2841 	/*
2842 	 * Use DMA pool facility provided by PCI layer
2843 	 */
2844 	instance->frame_dma_pool = pci_pool_create("megasas frame pool",
2845 						   instance->pdev, total_sz, 64,
2846 						   0);
2847 
2848 	if (!instance->frame_dma_pool) {
2849 		printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
2850 		return -ENOMEM;
2851 	}
2852 
2853 	instance->sense_dma_pool = pci_pool_create("megasas sense pool",
2854 						   instance->pdev, 128, 4, 0);
2855 
2856 	if (!instance->sense_dma_pool) {
2857 		printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
2858 
2859 		pci_pool_destroy(instance->frame_dma_pool);
2860 		instance->frame_dma_pool = NULL;
2861 
2862 		return -ENOMEM;
2863 	}
2864 
2865 	/*
2866 	 * Allocate and attach a frame to each of the commands in cmd_list.
2867 	 * By making cmd->index as the context instead of the &cmd, we can
2868 	 * always use 32bit context regardless of the architecture
2869 	 */
2870 	for (i = 0; i < max_cmd; i++) {
2871 
2872 		cmd = instance->cmd_list[i];
2873 
2874 		cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
2875 					    GFP_KERNEL, &cmd->frame_phys_addr);
2876 
2877 		cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
2878 					    GFP_KERNEL, &cmd->sense_phys_addr);
2879 
2880 		/*
2881 		 * megasas_teardown_frame_pool() takes care of freeing
2882 		 * whatever has been allocated
2883 		 */
2884 		if (!cmd->frame || !cmd->sense) {
2885 			printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
2886 			megasas_teardown_frame_pool(instance);
2887 			return -ENOMEM;
2888 		}
2889 
2890 		memset(cmd->frame, 0, total_sz);
2891 		cmd->frame->io.context = cmd->index;
2892 		cmd->frame->io.pad_0 = 0;
2893 	}
2894 
2895 	return 0;
2896 }
2897 
2898 /**
2899  * megasas_free_cmds -	Free all the cmds in the free cmd pool
2900  * @instance:		Adapter soft state
2901  */
2902 void megasas_free_cmds(struct megasas_instance *instance)
2903 {
2904 	int i;
2905 	/* First free the MFI frame pool */
2906 	megasas_teardown_frame_pool(instance);
2907 
2908 	/* Free all the commands in the cmd_list */
2909 	for (i = 0; i < instance->max_mfi_cmds; i++)
2910 
2911 		kfree(instance->cmd_list[i]);
2912 
2913 	/* Free the cmd_list buffer itself */
2914 	kfree(instance->cmd_list);
2915 	instance->cmd_list = NULL;
2916 
2917 	INIT_LIST_HEAD(&instance->cmd_pool);
2918 }
2919 
2920 /**
2921  * megasas_alloc_cmds -	Allocates the command packets
2922  * @instance:		Adapter soft state
2923  *
2924  * Each command that is issued to the FW, whether IO commands from the OS or
2925  * internal commands like IOCTLs, are wrapped in local data structure called
2926  * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
2927  * the FW.
2928  *
2929  * Each frame has a 32-bit field called context (tag). This context is used
2930  * to get back the megasas_cmd from the frame when a frame gets completed in
2931  * the ISR. Typically the address of the megasas_cmd itself would be used as
2932  * the context. But we wanted to keep the differences between 32 and 64 bit
2933  * systems to the mininum. We always use 32 bit integers for the context. In
2934  * this driver, the 32 bit values are the indices into an array cmd_list.
2935  * This array is used only to look up the megasas_cmd given the context. The
2936  * free commands themselves are maintained in a linked list called cmd_pool.
2937  */
2938 int megasas_alloc_cmds(struct megasas_instance *instance)
2939 {
2940 	int i;
2941 	int j;
2942 	u32 max_cmd;
2943 	struct megasas_cmd *cmd;
2944 
2945 	max_cmd = instance->max_mfi_cmds;
2946 
2947 	/*
2948 	 * instance->cmd_list is an array of struct megasas_cmd pointers.
2949 	 * Allocate the dynamic array first and then allocate individual
2950 	 * commands.
2951 	 */
2952 	instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL);
2953 
2954 	if (!instance->cmd_list) {
2955 		printk(KERN_DEBUG "megasas: out of memory\n");
2956 		return -ENOMEM;
2957 	}
2958 
2959 	memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);
2960 
2961 	for (i = 0; i < max_cmd; i++) {
2962 		instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
2963 						GFP_KERNEL);
2964 
2965 		if (!instance->cmd_list[i]) {
2966 
2967 			for (j = 0; j < i; j++)
2968 				kfree(instance->cmd_list[j]);
2969 
2970 			kfree(instance->cmd_list);
2971 			instance->cmd_list = NULL;
2972 
2973 			return -ENOMEM;
2974 		}
2975 	}
2976 
2977 	/*
2978 	 * Add all the commands to command pool (instance->cmd_pool)
2979 	 */
2980 	for (i = 0; i < max_cmd; i++) {
2981 		cmd = instance->cmd_list[i];
2982 		memset(cmd, 0, sizeof(struct megasas_cmd));
2983 		cmd->index = i;
2984 		cmd->scmd = NULL;
2985 		cmd->instance = instance;
2986 
2987 		list_add_tail(&cmd->list, &instance->cmd_pool);
2988 	}
2989 
2990 	/*
2991 	 * Create a frame pool and assign one frame to each cmd
2992 	 */
2993 	if (megasas_create_frame_pool(instance)) {
2994 		printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
2995 		megasas_free_cmds(instance);
2996 	}
2997 
2998 	return 0;
2999 }
3000 
3001 /*
3002  * megasas_get_pd_list_info -	Returns FW's pd_list structure
3003  * @instance:				Adapter soft state
3004  * @pd_list:				pd_list structure
3005  *
3006  * Issues an internal command (DCMD) to get the FW's controller PD
3007  * list structure.  This information is mainly used to find out SYSTEM
3008  * supported by the FW.
3009  */
3010 static int
3011 megasas_get_pd_list(struct megasas_instance *instance)
3012 {
3013 	int ret = 0, pd_index = 0;
3014 	struct megasas_cmd *cmd;
3015 	struct megasas_dcmd_frame *dcmd;
3016 	struct MR_PD_LIST *ci;
3017 	struct MR_PD_ADDRESS *pd_addr;
3018 	dma_addr_t ci_h = 0;
3019 
3020 	cmd = megasas_get_cmd(instance);
3021 
3022 	if (!cmd) {
3023 		printk(KERN_DEBUG "megasas (get_pd_list): Failed to get cmd\n");
3024 		return -ENOMEM;
3025 	}
3026 
3027 	dcmd = &cmd->frame->dcmd;
3028 
3029 	ci = pci_alloc_consistent(instance->pdev,
3030 		  MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST), &ci_h);
3031 
3032 	if (!ci) {
3033 		printk(KERN_DEBUG "Failed to alloc mem for pd_list\n");
3034 		megasas_return_cmd(instance, cmd);
3035 		return -ENOMEM;
3036 	}
3037 
3038 	memset(ci, 0, sizeof(*ci));
3039 	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3040 
3041 	dcmd->mbox.b[0] = MR_PD_QUERY_TYPE_EXPOSED_TO_HOST;
3042 	dcmd->mbox.b[1] = 0;
3043 	dcmd->cmd = MFI_CMD_DCMD;
3044 	dcmd->cmd_status = 0xFF;
3045 	dcmd->sge_count = 1;
3046 	dcmd->flags = MFI_FRAME_DIR_READ;
3047 	dcmd->timeout = 0;
3048 	dcmd->pad_0 = 0;
3049 	dcmd->data_xfer_len = MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST);
3050 	dcmd->opcode = MR_DCMD_PD_LIST_QUERY;
3051 	dcmd->sgl.sge32[0].phys_addr = ci_h;
3052 	dcmd->sgl.sge32[0].length = MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST);
3053 
3054 	if (!megasas_issue_polled(instance, cmd)) {
3055 		ret = 0;
3056 	} else {
3057 		ret = -1;
3058 	}
3059 
3060 	/*
3061 	* the following function will get the instance PD LIST.
3062 	*/
3063 
3064 	pd_addr = ci->addr;
3065 
3066 	if ( ret == 0 &&
3067 		(ci->count <
3068 		  (MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL))) {
3069 
3070 		memset(instance->pd_list, 0,
3071 			MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));
3072 
3073 		for (pd_index = 0; pd_index < ci->count; pd_index++) {
3074 
3075 			instance->pd_list[pd_addr->deviceId].tid	=
3076 							pd_addr->deviceId;
3077 			instance->pd_list[pd_addr->deviceId].driveType	=
3078 							pd_addr->scsiDevType;
3079 			instance->pd_list[pd_addr->deviceId].driveState	=
3080 							MR_PD_STATE_SYSTEM;
3081 			pd_addr++;
3082 		}
3083 	}
3084 
3085 	pci_free_consistent(instance->pdev,
3086 				MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
3087 				ci, ci_h);
3088 	megasas_return_cmd(instance, cmd);
3089 
3090 	return ret;
3091 }
3092 
3093 /*
3094  * megasas_get_ld_list_info -	Returns FW's ld_list structure
3095  * @instance:				Adapter soft state
3096  * @ld_list:				ld_list structure
3097  *
3098  * Issues an internal command (DCMD) to get the FW's controller PD
3099  * list structure.  This information is mainly used to find out SYSTEM
3100  * supported by the FW.
3101  */
3102 static int
3103 megasas_get_ld_list(struct megasas_instance *instance)
3104 {
3105 	int ret = 0, ld_index = 0, ids = 0;
3106 	struct megasas_cmd *cmd;
3107 	struct megasas_dcmd_frame *dcmd;
3108 	struct MR_LD_LIST *ci;
3109 	dma_addr_t ci_h = 0;
3110 
3111 	cmd = megasas_get_cmd(instance);
3112 
3113 	if (!cmd) {
3114 		printk(KERN_DEBUG "megasas_get_ld_list: Failed to get cmd\n");
3115 		return -ENOMEM;
3116 	}
3117 
3118 	dcmd = &cmd->frame->dcmd;
3119 
3120 	ci = pci_alloc_consistent(instance->pdev,
3121 				sizeof(struct MR_LD_LIST),
3122 				&ci_h);
3123 
3124 	if (!ci) {
3125 		printk(KERN_DEBUG "Failed to alloc mem in get_ld_list\n");
3126 		megasas_return_cmd(instance, cmd);
3127 		return -ENOMEM;
3128 	}
3129 
3130 	memset(ci, 0, sizeof(*ci));
3131 	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3132 
3133 	dcmd->cmd = MFI_CMD_DCMD;
3134 	dcmd->cmd_status = 0xFF;
3135 	dcmd->sge_count = 1;
3136 	dcmd->flags = MFI_FRAME_DIR_READ;
3137 	dcmd->timeout = 0;
3138 	dcmd->data_xfer_len = sizeof(struct MR_LD_LIST);
3139 	dcmd->opcode = MR_DCMD_LD_GET_LIST;
3140 	dcmd->sgl.sge32[0].phys_addr = ci_h;
3141 	dcmd->sgl.sge32[0].length = sizeof(struct MR_LD_LIST);
3142 	dcmd->pad_0  = 0;
3143 
3144 	if (!megasas_issue_polled(instance, cmd)) {
3145 		ret = 0;
3146 	} else {
3147 		ret = -1;
3148 	}
3149 
3150 	/* the following function will get the instance PD LIST */
3151 
3152 	if ((ret == 0) && (ci->ldCount <= MAX_LOGICAL_DRIVES)) {
3153 		memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
3154 
3155 		for (ld_index = 0; ld_index < ci->ldCount; ld_index++) {
3156 			if (ci->ldList[ld_index].state != 0) {
3157 				ids = ci->ldList[ld_index].ref.targetId;
3158 				instance->ld_ids[ids] =
3159 					ci->ldList[ld_index].ref.targetId;
3160 			}
3161 		}
3162 	}
3163 
3164 	pci_free_consistent(instance->pdev,
3165 				sizeof(struct MR_LD_LIST),
3166 				ci,
3167 				ci_h);
3168 
3169 	megasas_return_cmd(instance, cmd);
3170 	return ret;
3171 }
3172 
3173 /**
3174  * megasas_get_controller_info -	Returns FW's controller structure
3175  * @instance:				Adapter soft state
3176  * @ctrl_info:				Controller information structure
3177  *
3178  * Issues an internal command (DCMD) to get the FW's controller structure.
3179  * This information is mainly used to find out the maximum IO transfer per
3180  * command supported by the FW.
3181  */
3182 static int
3183 megasas_get_ctrl_info(struct megasas_instance *instance,
3184 		      struct megasas_ctrl_info *ctrl_info)
3185 {
3186 	int ret = 0;
3187 	struct megasas_cmd *cmd;
3188 	struct megasas_dcmd_frame *dcmd;
3189 	struct megasas_ctrl_info *ci;
3190 	dma_addr_t ci_h = 0;
3191 
3192 	cmd = megasas_get_cmd(instance);
3193 
3194 	if (!cmd) {
3195 		printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
3196 		return -ENOMEM;
3197 	}
3198 
3199 	dcmd = &cmd->frame->dcmd;
3200 
3201 	ci = pci_alloc_consistent(instance->pdev,
3202 				  sizeof(struct megasas_ctrl_info), &ci_h);
3203 
3204 	if (!ci) {
3205 		printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
3206 		megasas_return_cmd(instance, cmd);
3207 		return -ENOMEM;
3208 	}
3209 
3210 	memset(ci, 0, sizeof(*ci));
3211 	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3212 
3213 	dcmd->cmd = MFI_CMD_DCMD;
3214 	dcmd->cmd_status = 0xFF;
3215 	dcmd->sge_count = 1;
3216 	dcmd->flags = MFI_FRAME_DIR_READ;
3217 	dcmd->timeout = 0;
3218 	dcmd->pad_0 = 0;
3219 	dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
3220 	dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
3221 	dcmd->sgl.sge32[0].phys_addr = ci_h;
3222 	dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
3223 
3224 	if (!megasas_issue_polled(instance, cmd)) {
3225 		ret = 0;
3226 		memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
3227 	} else {
3228 		ret = -1;
3229 	}
3230 
3231 	pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
3232 			    ci, ci_h);
3233 
3234 	megasas_return_cmd(instance, cmd);
3235 	return ret;
3236 }
3237 
3238 /**
3239  * megasas_issue_init_mfi -	Initializes the FW
3240  * @instance:		Adapter soft state
3241  *
3242  * Issues the INIT MFI cmd
3243  */
3244 static int
3245 megasas_issue_init_mfi(struct megasas_instance *instance)
3246 {
3247 	u32 context;
3248 
3249 	struct megasas_cmd *cmd;
3250 
3251 	struct megasas_init_frame *init_frame;
3252 	struct megasas_init_queue_info *initq_info;
3253 	dma_addr_t init_frame_h;
3254 	dma_addr_t initq_info_h;
3255 
3256 	/*
3257 	 * Prepare a init frame. Note the init frame points to queue info
3258 	 * structure. Each frame has SGL allocated after first 64 bytes. For
3259 	 * this frame - since we don't need any SGL - we use SGL's space as
3260 	 * queue info structure
3261 	 *
3262 	 * We will not get a NULL command below. We just created the pool.
3263 	 */
3264 	cmd = megasas_get_cmd(instance);
3265 
3266 	init_frame = (struct megasas_init_frame *)cmd->frame;
3267 	initq_info = (struct megasas_init_queue_info *)
3268 		((unsigned long)init_frame + 64);
3269 
3270 	init_frame_h = cmd->frame_phys_addr;
3271 	initq_info_h = init_frame_h + 64;
3272 
3273 	context = init_frame->context;
3274 	memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
3275 	memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
3276 	init_frame->context = context;
3277 
3278 	initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
3279 	initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
3280 
3281 	initq_info->producer_index_phys_addr_lo = instance->producer_h;
3282 	initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
3283 
3284 	init_frame->cmd = MFI_CMD_INIT;
3285 	init_frame->cmd_status = 0xFF;
3286 	init_frame->queue_info_new_phys_addr_lo = initq_info_h;
3287 
3288 	init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
3289 
3290 	/*
3291 	 * disable the intr before firing the init frame to FW
3292 	 */
3293 	instance->instancet->disable_intr(instance->reg_set);
3294 
3295 	/*
3296 	 * Issue the init frame in polled mode
3297 	 */
3298 
3299 	if (megasas_issue_polled(instance, cmd)) {
3300 		printk(KERN_ERR "megasas: Failed to init firmware\n");
3301 		megasas_return_cmd(instance, cmd);
3302 		goto fail_fw_init;
3303 	}
3304 
3305 	megasas_return_cmd(instance, cmd);
3306 
3307 	return 0;
3308 
3309 fail_fw_init:
3310 	return -EINVAL;
3311 }
3312 
3313 /**
3314  * megasas_start_timer - Initializes a timer object
3315  * @instance:		Adapter soft state
3316  * @timer:		timer object to be initialized
3317  * @fn:			timer function
3318  * @interval:		time interval between timer function call
3319  */
3320 static inline void
3321 megasas_start_timer(struct megasas_instance *instance,
3322 			struct timer_list *timer,
3323 			void *fn, unsigned long interval)
3324 {
3325 	init_timer(timer);
3326 	timer->expires = jiffies + interval;
3327 	timer->data = (unsigned long)instance;
3328 	timer->function = fn;
3329 	add_timer(timer);
3330 }
3331 
3332 /**
3333  * megasas_io_completion_timer - Timer fn
3334  * @instance_addr:	Address of adapter soft state
3335  *
3336  * Schedules tasklet for cmd completion
3337  * if poll_mode_io is set
3338  */
3339 static void
3340 megasas_io_completion_timer(unsigned long instance_addr)
3341 {
3342 	struct megasas_instance *instance =
3343 			(struct megasas_instance *)instance_addr;
3344 
3345 	if (atomic_read(&instance->fw_outstanding))
3346 		tasklet_schedule(&instance->isr_tasklet);
3347 
3348 	/* Restart timer */
3349 	if (poll_mode_io)
3350 		mod_timer(&instance->io_completion_timer,
3351 			jiffies + MEGASAS_COMPLETION_TIMER_INTERVAL);
3352 }
3353 
3354 static u32
3355 megasas_init_adapter_mfi(struct megasas_instance *instance)
3356 {
3357 	struct megasas_register_set __iomem *reg_set;
3358 	u32 context_sz;
3359 	u32 reply_q_sz;
3360 
3361 	reg_set = instance->reg_set;
3362 
3363 	/*
3364 	 * Get various operational parameters from status register
3365 	 */
3366 	instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
3367 	/*
3368 	 * Reduce the max supported cmds by 1. This is to ensure that the
3369 	 * reply_q_sz (1 more than the max cmd that driver may send)
3370 	 * does not exceed max cmds that the FW can support
3371 	 */
3372 	instance->max_fw_cmds = instance->max_fw_cmds-1;
3373 	instance->max_mfi_cmds = instance->max_fw_cmds;
3374 	instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
3375 					0x10;
3376 	/*
3377 	 * Create a pool of commands
3378 	 */
3379 	if (megasas_alloc_cmds(instance))
3380 		goto fail_alloc_cmds;
3381 
3382 	/*
3383 	 * Allocate memory for reply queue. Length of reply queue should
3384 	 * be _one_ more than the maximum commands handled by the firmware.
3385 	 *
3386 	 * Note: When FW completes commands, it places corresponding contex
3387 	 * values in this circular reply queue. This circular queue is a fairly
3388 	 * typical producer-consumer queue. FW is the producer (of completed
3389 	 * commands) and the driver is the consumer.
3390 	 */
3391 	context_sz = sizeof(u32);
3392 	reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
3393 
3394 	instance->reply_queue = pci_alloc_consistent(instance->pdev,
3395 						     reply_q_sz,
3396 						     &instance->reply_queue_h);
3397 
3398 	if (!instance->reply_queue) {
3399 		printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
3400 		goto fail_reply_queue;
3401 	}
3402 
3403 	if (megasas_issue_init_mfi(instance))
3404 		goto fail_fw_init;
3405 
3406 	instance->fw_support_ieee = 0;
3407 	instance->fw_support_ieee =
3408 		(instance->instancet->read_fw_status_reg(reg_set) &
3409 		0x04000000);
3410 
3411 	printk(KERN_NOTICE "megasas_init_mfi: fw_support_ieee=%d",
3412 			instance->fw_support_ieee);
3413 
3414 	if (instance->fw_support_ieee)
3415 		instance->flag_ieee = 1;
3416 
3417 	return 0;
3418 
3419 fail_fw_init:
3420 
3421 	pci_free_consistent(instance->pdev, reply_q_sz,
3422 			    instance->reply_queue, instance->reply_queue_h);
3423 fail_reply_queue:
3424 	megasas_free_cmds(instance);
3425 
3426 fail_alloc_cmds:
3427 	iounmap(instance->reg_set);
3428 	return 1;
3429 }
3430 
3431 /**
3432  * megasas_init_fw -	Initializes the FW
3433  * @instance:		Adapter soft state
3434  *
3435  * This is the main function for initializing firmware
3436  */
3437 
3438 static int megasas_init_fw(struct megasas_instance *instance)
3439 {
3440 	u32 max_sectors_1;
3441 	u32 max_sectors_2;
3442 	u32 tmp_sectors;
3443 	struct megasas_register_set __iomem *reg_set;
3444 	struct megasas_ctrl_info *ctrl_info;
3445 	unsigned long bar_list;
3446 
3447 	/* Find first memory bar */
3448 	bar_list = pci_select_bars(instance->pdev, IORESOURCE_MEM);
3449 	instance->bar = find_first_bit(&bar_list, sizeof(unsigned long));
3450 	instance->base_addr = pci_resource_start(instance->pdev, instance->bar);
3451 	if (pci_request_selected_regions(instance->pdev, instance->bar,
3452 					 "megasas: LSI")) {
3453 		printk(KERN_DEBUG "megasas: IO memory region busy!\n");
3454 		return -EBUSY;
3455 	}
3456 
3457 	instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
3458 
3459 	if (!instance->reg_set) {
3460 		printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
3461 		goto fail_ioremap;
3462 	}
3463 
3464 	reg_set = instance->reg_set;
3465 
3466 	switch (instance->pdev->device) {
3467 	case PCI_DEVICE_ID_LSI_FUSION:
3468 		instance->instancet = &megasas_instance_template_fusion;
3469 		break;
3470 	case PCI_DEVICE_ID_LSI_SAS1078R:
3471 	case PCI_DEVICE_ID_LSI_SAS1078DE:
3472 		instance->instancet = &megasas_instance_template_ppc;
3473 		break;
3474 	case PCI_DEVICE_ID_LSI_SAS1078GEN2:
3475 	case PCI_DEVICE_ID_LSI_SAS0079GEN2:
3476 		instance->instancet = &megasas_instance_template_gen2;
3477 		break;
3478 	case PCI_DEVICE_ID_LSI_SAS0073SKINNY:
3479 	case PCI_DEVICE_ID_LSI_SAS0071SKINNY:
3480 		instance->instancet = &megasas_instance_template_skinny;
3481 		break;
3482 	case PCI_DEVICE_ID_LSI_SAS1064R:
3483 	case PCI_DEVICE_ID_DELL_PERC5:
3484 	default:
3485 		instance->instancet = &megasas_instance_template_xscale;
3486 		break;
3487 	}
3488 
3489 	/*
3490 	 * We expect the FW state to be READY
3491 	 */
3492 	if (megasas_transition_to_ready(instance))
3493 		goto fail_ready_state;
3494 
3495 	/* Get operational params, sge flags, send init cmd to controller */
3496 	if (instance->instancet->init_adapter(instance))
3497 		return -ENODEV;
3498 
3499 	printk(KERN_ERR "megasas: INIT adapter done\n");
3500 
3501 	/** for passthrough
3502 	* the following function will get the PD LIST.
3503 	*/
3504 
3505 	memset(instance->pd_list, 0 ,
3506 		(MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)));
3507 	megasas_get_pd_list(instance);
3508 
3509 	memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
3510 	megasas_get_ld_list(instance);
3511 
3512 	ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
3513 
3514 	/*
3515 	 * Compute the max allowed sectors per IO: The controller info has two
3516 	 * limits on max sectors. Driver should use the minimum of these two.
3517 	 *
3518 	 * 1 << stripe_sz_ops.min = max sectors per strip
3519 	 *
3520 	 * Note that older firmwares ( < FW ver 30) didn't report information
3521 	 * to calculate max_sectors_1. So the number ended up as zero always.
3522 	 */
3523 	tmp_sectors = 0;
3524 	if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
3525 
3526 		max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
3527 		    ctrl_info->max_strips_per_io;
3528 		max_sectors_2 = ctrl_info->max_request_size;
3529 
3530 		tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2);
3531 		instance->disableOnlineCtrlReset =
3532 		ctrl_info->properties.OnOffProperties.disableOnlineCtrlReset;
3533 	}
3534 
3535 	instance->max_sectors_per_req = instance->max_num_sge *
3536 						PAGE_SIZE / 512;
3537 	if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
3538 		instance->max_sectors_per_req = tmp_sectors;
3539 
3540 	kfree(ctrl_info);
3541 
3542         /*
3543 	* Setup tasklet for cmd completion
3544 	*/
3545 
3546 	tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc,
3547 		(unsigned long)instance);
3548 
3549 	/* Initialize the cmd completion timer */
3550 	if (poll_mode_io)
3551 		megasas_start_timer(instance, &instance->io_completion_timer,
3552 				megasas_io_completion_timer,
3553 				MEGASAS_COMPLETION_TIMER_INTERVAL);
3554 	return 0;
3555 
3556 fail_ready_state:
3557 	iounmap(instance->reg_set);
3558 
3559       fail_ioremap:
3560 	pci_release_selected_regions(instance->pdev, instance->bar);
3561 
3562 	return -EINVAL;
3563 }
3564 
3565 /**
3566  * megasas_release_mfi -	Reverses the FW initialization
3567  * @intance:			Adapter soft state
3568  */
3569 static void megasas_release_mfi(struct megasas_instance *instance)
3570 {
3571 	u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);
3572 
3573 	if (instance->reply_queue)
3574 		pci_free_consistent(instance->pdev, reply_q_sz,
3575 			    instance->reply_queue, instance->reply_queue_h);
3576 
3577 	megasas_free_cmds(instance);
3578 
3579 	iounmap(instance->reg_set);
3580 
3581 	pci_release_selected_regions(instance->pdev, instance->bar);
3582 }
3583 
3584 /**
3585  * megasas_get_seq_num -	Gets latest event sequence numbers
3586  * @instance:			Adapter soft state
3587  * @eli:			FW event log sequence numbers information
3588  *
3589  * FW maintains a log of all events in a non-volatile area. Upper layers would
3590  * usually find out the latest sequence number of the events, the seq number at
3591  * the boot etc. They would "read" all the events below the latest seq number
3592  * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
3593  * number), they would subsribe to AEN (asynchronous event notification) and
3594  * wait for the events to happen.
3595  */
3596 static int
3597 megasas_get_seq_num(struct megasas_instance *instance,
3598 		    struct megasas_evt_log_info *eli)
3599 {
3600 	struct megasas_cmd *cmd;
3601 	struct megasas_dcmd_frame *dcmd;
3602 	struct megasas_evt_log_info *el_info;
3603 	dma_addr_t el_info_h = 0;
3604 
3605 	cmd = megasas_get_cmd(instance);
3606 
3607 	if (!cmd) {
3608 		return -ENOMEM;
3609 	}
3610 
3611 	dcmd = &cmd->frame->dcmd;
3612 	el_info = pci_alloc_consistent(instance->pdev,
3613 				       sizeof(struct megasas_evt_log_info),
3614 				       &el_info_h);
3615 
3616 	if (!el_info) {
3617 		megasas_return_cmd(instance, cmd);
3618 		return -ENOMEM;
3619 	}
3620 
3621 	memset(el_info, 0, sizeof(*el_info));
3622 	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3623 
3624 	dcmd->cmd = MFI_CMD_DCMD;
3625 	dcmd->cmd_status = 0x0;
3626 	dcmd->sge_count = 1;
3627 	dcmd->flags = MFI_FRAME_DIR_READ;
3628 	dcmd->timeout = 0;
3629 	dcmd->pad_0 = 0;
3630 	dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
3631 	dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
3632 	dcmd->sgl.sge32[0].phys_addr = el_info_h;
3633 	dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
3634 
3635 	megasas_issue_blocked_cmd(instance, cmd);
3636 
3637 	/*
3638 	 * Copy the data back into callers buffer
3639 	 */
3640 	memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
3641 
3642 	pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
3643 			    el_info, el_info_h);
3644 
3645 	megasas_return_cmd(instance, cmd);
3646 
3647 	return 0;
3648 }
3649 
3650 /**
3651  * megasas_register_aen -	Registers for asynchronous event notification
3652  * @instance:			Adapter soft state
3653  * @seq_num:			The starting sequence number
3654  * @class_locale:		Class of the event
3655  *
3656  * This function subscribes for AEN for events beyond the @seq_num. It requests
3657  * to be notified if and only if the event is of type @class_locale
3658  */
3659 static int
3660 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
3661 		     u32 class_locale_word)
3662 {
3663 	int ret_val;
3664 	struct megasas_cmd *cmd;
3665 	struct megasas_dcmd_frame *dcmd;
3666 	union megasas_evt_class_locale curr_aen;
3667 	union megasas_evt_class_locale prev_aen;
3668 
3669 	/*
3670 	 * If there an AEN pending already (aen_cmd), check if the
3671 	 * class_locale of that pending AEN is inclusive of the new
3672 	 * AEN request we currently have. If it is, then we don't have
3673 	 * to do anything. In other words, whichever events the current
3674 	 * AEN request is subscribing to, have already been subscribed
3675 	 * to.
3676 	 *
3677 	 * If the old_cmd is _not_ inclusive, then we have to abort
3678 	 * that command, form a class_locale that is superset of both
3679 	 * old and current and re-issue to the FW
3680 	 */
3681 
3682 	curr_aen.word = class_locale_word;
3683 
3684 	if (instance->aen_cmd) {
3685 
3686 		prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
3687 
3688 		/*
3689 		 * A class whose enum value is smaller is inclusive of all
3690 		 * higher values. If a PROGRESS (= -1) was previously
3691 		 * registered, then a new registration requests for higher
3692 		 * classes need not be sent to FW. They are automatically
3693 		 * included.
3694 		 *
3695 		 * Locale numbers don't have such hierarchy. They are bitmap
3696 		 * values
3697 		 */
3698 		if ((prev_aen.members.class <= curr_aen.members.class) &&
3699 		    !((prev_aen.members.locale & curr_aen.members.locale) ^
3700 		      curr_aen.members.locale)) {
3701 			/*
3702 			 * Previously issued event registration includes
3703 			 * current request. Nothing to do.
3704 			 */
3705 			return 0;
3706 		} else {
3707 			curr_aen.members.locale |= prev_aen.members.locale;
3708 
3709 			if (prev_aen.members.class < curr_aen.members.class)
3710 				curr_aen.members.class = prev_aen.members.class;
3711 
3712 			instance->aen_cmd->abort_aen = 1;
3713 			ret_val = megasas_issue_blocked_abort_cmd(instance,
3714 								  instance->
3715 								  aen_cmd);
3716 
3717 			if (ret_val) {
3718 				printk(KERN_DEBUG "megasas: Failed to abort "
3719 				       "previous AEN command\n");
3720 				return ret_val;
3721 			}
3722 		}
3723 	}
3724 
3725 	cmd = megasas_get_cmd(instance);
3726 
3727 	if (!cmd)
3728 		return -ENOMEM;
3729 
3730 	dcmd = &cmd->frame->dcmd;
3731 
3732 	memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
3733 
3734 	/*
3735 	 * Prepare DCMD for aen registration
3736 	 */
3737 	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3738 
3739 	dcmd->cmd = MFI_CMD_DCMD;
3740 	dcmd->cmd_status = 0x0;
3741 	dcmd->sge_count = 1;
3742 	dcmd->flags = MFI_FRAME_DIR_READ;
3743 	dcmd->timeout = 0;
3744 	dcmd->pad_0 = 0;
3745 	instance->last_seq_num = seq_num;
3746 	dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
3747 	dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
3748 	dcmd->mbox.w[0] = seq_num;
3749 	dcmd->mbox.w[1] = curr_aen.word;
3750 	dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
3751 	dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
3752 
3753 	if (instance->aen_cmd != NULL) {
3754 		megasas_return_cmd(instance, cmd);
3755 		return 0;
3756 	}
3757 
3758 	/*
3759 	 * Store reference to the cmd used to register for AEN. When an
3760 	 * application wants us to register for AEN, we have to abort this
3761 	 * cmd and re-register with a new EVENT LOCALE supplied by that app
3762 	 */
3763 	instance->aen_cmd = cmd;
3764 
3765 	/*
3766 	 * Issue the aen registration frame
3767 	 */
3768 	instance->instancet->issue_dcmd(instance, cmd);
3769 
3770 	return 0;
3771 }
3772 
3773 /**
3774  * megasas_start_aen -	Subscribes to AEN during driver load time
3775  * @instance:		Adapter soft state
3776  */
3777 static int megasas_start_aen(struct megasas_instance *instance)
3778 {
3779 	struct megasas_evt_log_info eli;
3780 	union megasas_evt_class_locale class_locale;
3781 
3782 	/*
3783 	 * Get the latest sequence number from FW
3784 	 */
3785 	memset(&eli, 0, sizeof(eli));
3786 
3787 	if (megasas_get_seq_num(instance, &eli))
3788 		return -1;
3789 
3790 	/*
3791 	 * Register AEN with FW for latest sequence number plus 1
3792 	 */
3793 	class_locale.members.reserved = 0;
3794 	class_locale.members.locale = MR_EVT_LOCALE_ALL;
3795 	class_locale.members.class = MR_EVT_CLASS_DEBUG;
3796 
3797 	return megasas_register_aen(instance, eli.newest_seq_num + 1,
3798 				    class_locale.word);
3799 }
3800 
3801 /**
3802  * megasas_io_attach -	Attaches this driver to SCSI mid-layer
3803  * @instance:		Adapter soft state
3804  */
3805 static int megasas_io_attach(struct megasas_instance *instance)
3806 {
3807 	struct Scsi_Host *host = instance->host;
3808 
3809 	/*
3810 	 * Export parameters required by SCSI mid-layer
3811 	 */
3812 	host->irq = instance->pdev->irq;
3813 	host->unique_id = instance->unique_id;
3814 	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3815 		(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
3816 		host->can_queue =
3817 			instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
3818 	} else
3819 		host->can_queue =
3820 			instance->max_fw_cmds - MEGASAS_INT_CMDS;
3821 	host->this_id = instance->init_id;
3822 	host->sg_tablesize = instance->max_num_sge;
3823 	/*
3824 	 * Check if the module parameter value for max_sectors can be used
3825 	 */
3826 	if (max_sectors && max_sectors < instance->max_sectors_per_req)
3827 		instance->max_sectors_per_req = max_sectors;
3828 	else {
3829 		if (max_sectors) {
3830 			if (((instance->pdev->device ==
3831 				PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
3832 				(instance->pdev->device ==
3833 				PCI_DEVICE_ID_LSI_SAS0079GEN2)) &&
3834 				(max_sectors <= MEGASAS_MAX_SECTORS)) {
3835 				instance->max_sectors_per_req = max_sectors;
3836 			} else {
3837 			printk(KERN_INFO "megasas: max_sectors should be > 0"
3838 				"and <= %d (or < 1MB for GEN2 controller)\n",
3839 				instance->max_sectors_per_req);
3840 			}
3841 		}
3842 	}
3843 
3844 	host->max_sectors = instance->max_sectors_per_req;
3845 	host->cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
3846 	host->max_channel = MEGASAS_MAX_CHANNELS - 1;
3847 	host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
3848 	host->max_lun = MEGASAS_MAX_LUN;
3849 	host->max_cmd_len = 16;
3850 
3851 	/* Fusion only supports host reset */
3852 	if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) {
3853 		host->hostt->eh_device_reset_handler = NULL;
3854 		host->hostt->eh_bus_reset_handler = NULL;
3855 	}
3856 
3857 	/*
3858 	 * Notify the mid-layer about the new controller
3859 	 */
3860 	if (scsi_add_host(host, &instance->pdev->dev)) {
3861 		printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
3862 		return -ENODEV;
3863 	}
3864 
3865 	/*
3866 	 * Trigger SCSI to scan our drives
3867 	 */
3868 	scsi_scan_host(host);
3869 	return 0;
3870 }
3871 
3872 static int
3873 megasas_set_dma_mask(struct pci_dev *pdev)
3874 {
3875 	/*
3876 	 * All our contollers are capable of performing 64-bit DMA
3877 	 */
3878 	if (IS_DMA64) {
3879 		if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
3880 
3881 			if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
3882 				goto fail_set_dma_mask;
3883 		}
3884 	} else {
3885 		if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
3886 			goto fail_set_dma_mask;
3887 	}
3888 	return 0;
3889 
3890 fail_set_dma_mask:
3891 	return 1;
3892 }
3893 
3894 /**
3895  * megasas_probe_one -	PCI hotplug entry point
3896  * @pdev:		PCI device structure
3897  * @id:			PCI ids of supported hotplugged adapter
3898  */
3899 static int __devinit
3900 megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
3901 {
3902 	int rval;
3903 	struct Scsi_Host *host;
3904 	struct megasas_instance *instance;
3905 
3906 	/*
3907 	 * Announce PCI information
3908 	 */
3909 	printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
3910 	       pdev->vendor, pdev->device, pdev->subsystem_vendor,
3911 	       pdev->subsystem_device);
3912 
3913 	printk("bus %d:slot %d:func %d\n",
3914 	       pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
3915 
3916 	/*
3917 	 * PCI prepping: enable device set bus mastering and dma mask
3918 	 */
3919 	rval = pci_enable_device_mem(pdev);
3920 
3921 	if (rval) {
3922 		return rval;
3923 	}
3924 
3925 	pci_set_master(pdev);
3926 
3927 	if (megasas_set_dma_mask(pdev))
3928 		goto fail_set_dma_mask;
3929 
3930 	host = scsi_host_alloc(&megasas_template,
3931 			       sizeof(struct megasas_instance));
3932 
3933 	if (!host) {
3934 		printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
3935 		goto fail_alloc_instance;
3936 	}
3937 
3938 	instance = (struct megasas_instance *)host->hostdata;
3939 	memset(instance, 0, sizeof(*instance));
3940 	atomic_set( &instance->fw_reset_no_pci_access, 0 );
3941 	instance->pdev = pdev;
3942 
3943 	switch (instance->pdev->device) {
3944 	case PCI_DEVICE_ID_LSI_FUSION:
3945 	{
3946 		struct fusion_context *fusion;
3947 
3948 		instance->ctrl_context =
3949 			kzalloc(sizeof(struct fusion_context), GFP_KERNEL);
3950 		if (!instance->ctrl_context) {
3951 			printk(KERN_DEBUG "megasas: Failed to allocate "
3952 			       "memory for Fusion context info\n");
3953 			goto fail_alloc_dma_buf;
3954 		}
3955 		fusion = instance->ctrl_context;
3956 		INIT_LIST_HEAD(&fusion->cmd_pool);
3957 		spin_lock_init(&fusion->cmd_pool_lock);
3958 	}
3959 	break;
3960 	default: /* For all other supported controllers */
3961 
3962 		instance->producer =
3963 			pci_alloc_consistent(pdev, sizeof(u32),
3964 					     &instance->producer_h);
3965 		instance->consumer =
3966 			pci_alloc_consistent(pdev, sizeof(u32),
3967 					     &instance->consumer_h);
3968 
3969 		if (!instance->producer || !instance->consumer) {
3970 			printk(KERN_DEBUG "megasas: Failed to allocate"
3971 			       "memory for producer, consumer\n");
3972 			goto fail_alloc_dma_buf;
3973 		}
3974 
3975 		*instance->producer = 0;
3976 		*instance->consumer = 0;
3977 		break;
3978 	}
3979 
3980 	megasas_poll_wait_aen = 0;
3981 	instance->flag_ieee = 0;
3982 	instance->ev = NULL;
3983 	instance->issuepend_done = 1;
3984 	instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
3985 	megasas_poll_wait_aen = 0;
3986 
3987 	instance->evt_detail = pci_alloc_consistent(pdev,
3988 						    sizeof(struct
3989 							   megasas_evt_detail),
3990 						    &instance->evt_detail_h);
3991 
3992 	if (!instance->evt_detail) {
3993 		printk(KERN_DEBUG "megasas: Failed to allocate memory for "
3994 		       "event detail structure\n");
3995 		goto fail_alloc_dma_buf;
3996 	}
3997 
3998 	/*
3999 	 * Initialize locks and queues
4000 	 */
4001 	INIT_LIST_HEAD(&instance->cmd_pool);
4002 	INIT_LIST_HEAD(&instance->internal_reset_pending_q);
4003 
4004 	atomic_set(&instance->fw_outstanding,0);
4005 
4006 	init_waitqueue_head(&instance->int_cmd_wait_q);
4007 	init_waitqueue_head(&instance->abort_cmd_wait_q);
4008 
4009 	spin_lock_init(&instance->cmd_pool_lock);
4010 	spin_lock_init(&instance->hba_lock);
4011 	spin_lock_init(&instance->completion_lock);
4012 	spin_lock_init(&poll_aen_lock);
4013 
4014 	mutex_init(&instance->aen_mutex);
4015 	mutex_init(&instance->reset_mutex);
4016 
4017 	/*
4018 	 * Initialize PCI related and misc parameters
4019 	 */
4020 	instance->host = host;
4021 	instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
4022 	instance->init_id = MEGASAS_DEFAULT_INIT_ID;
4023 
4024 	if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
4025 		(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
4026 		instance->flag_ieee = 1;
4027 		sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
4028 	} else
4029 		sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
4030 
4031 	megasas_dbg_lvl = 0;
4032 	instance->flag = 0;
4033 	instance->unload = 1;
4034 	instance->last_time = 0;
4035 	instance->disableOnlineCtrlReset = 1;
4036 
4037 	if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)
4038 		INIT_WORK(&instance->work_init, megasas_fusion_ocr_wq);
4039 	else
4040 		INIT_WORK(&instance->work_init, process_fw_state_change_wq);
4041 
4042 	/*
4043 	 * Initialize MFI Firmware
4044 	 */
4045 	if (megasas_init_fw(instance))
4046 		goto fail_init_mfi;
4047 
4048 	/* Try to enable MSI-X */
4049 	if ((instance->pdev->device != PCI_DEVICE_ID_LSI_SAS1078R) &&
4050 	    (instance->pdev->device != PCI_DEVICE_ID_LSI_SAS1078DE) &&
4051 	    (instance->pdev->device != PCI_DEVICE_ID_LSI_VERDE_ZCR) &&
4052 	    !msix_disable && !pci_enable_msix(instance->pdev,
4053 					      &instance->msixentry, 1))
4054 		instance->msi_flag = 1;
4055 
4056 	/*
4057 	 * Register IRQ
4058 	 */
4059 	if (request_irq(instance->msi_flag ? instance->msixentry.vector :
4060 			pdev->irq, instance->instancet->service_isr,
4061 			IRQF_SHARED, "megasas", instance)) {
4062 		printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
4063 		goto fail_irq;
4064 	}
4065 
4066 	instance->instancet->enable_intr(instance->reg_set);
4067 
4068 	/*
4069 	 * Store instance in PCI softstate
4070 	 */
4071 	pci_set_drvdata(pdev, instance);
4072 
4073 	/*
4074 	 * Add this controller to megasas_mgmt_info structure so that it
4075 	 * can be exported to management applications
4076 	 */
4077 	megasas_mgmt_info.count++;
4078 	megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
4079 	megasas_mgmt_info.max_index++;
4080 
4081 	/*
4082 	 * Initiate AEN (Asynchronous Event Notification)
4083 	 */
4084 	if (megasas_start_aen(instance)) {
4085 		printk(KERN_DEBUG "megasas: start aen failed\n");
4086 		goto fail_start_aen;
4087 	}
4088 
4089 	/*
4090 	 * Register with SCSI mid-layer
4091 	 */
4092 	if (megasas_io_attach(instance))
4093 		goto fail_io_attach;
4094 
4095 	instance->unload = 0;
4096 	return 0;
4097 
4098       fail_start_aen:
4099       fail_io_attach:
4100 	megasas_mgmt_info.count--;
4101 	megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
4102 	megasas_mgmt_info.max_index--;
4103 
4104 	pci_set_drvdata(pdev, NULL);
4105 	instance->instancet->disable_intr(instance->reg_set);
4106 	free_irq(instance->msi_flag ? instance->msixentry.vector :
4107 		 instance->pdev->irq, instance);
4108 	if (instance->msi_flag)
4109 		pci_disable_msix(instance->pdev);
4110 
4111       fail_irq:
4112       fail_init_mfi:
4113       fail_alloc_dma_buf:
4114 	if (instance->evt_detail)
4115 		pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
4116 				    instance->evt_detail,
4117 				    instance->evt_detail_h);
4118 
4119 	if (instance->producer) {
4120 		pci_free_consistent(pdev, sizeof(u32), instance->producer,
4121 				    instance->producer_h);
4122 		megasas_release_mfi(instance);
4123 	} else {
4124 		megasas_release_fusion(instance);
4125 	}
4126 	if (instance->consumer)
4127 		pci_free_consistent(pdev, sizeof(u32), instance->consumer,
4128 				    instance->consumer_h);
4129 	scsi_host_put(host);
4130 
4131       fail_alloc_instance:
4132       fail_set_dma_mask:
4133 	pci_disable_device(pdev);
4134 
4135 	return -ENODEV;
4136 }
4137 
4138 /**
4139  * megasas_flush_cache -	Requests FW to flush all its caches
4140  * @instance:			Adapter soft state
4141  */
4142 static void megasas_flush_cache(struct megasas_instance *instance)
4143 {
4144 	struct megasas_cmd *cmd;
4145 	struct megasas_dcmd_frame *dcmd;
4146 
4147 	if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
4148 		return;
4149 
4150 	cmd = megasas_get_cmd(instance);
4151 
4152 	if (!cmd)
4153 		return;
4154 
4155 	dcmd = &cmd->frame->dcmd;
4156 
4157 	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4158 
4159 	dcmd->cmd = MFI_CMD_DCMD;
4160 	dcmd->cmd_status = 0x0;
4161 	dcmd->sge_count = 0;
4162 	dcmd->flags = MFI_FRAME_DIR_NONE;
4163 	dcmd->timeout = 0;
4164 	dcmd->pad_0 = 0;
4165 	dcmd->data_xfer_len = 0;
4166 	dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
4167 	dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
4168 
4169 	megasas_issue_blocked_cmd(instance, cmd);
4170 
4171 	megasas_return_cmd(instance, cmd);
4172 
4173 	return;
4174 }
4175 
4176 /**
4177  * megasas_shutdown_controller -	Instructs FW to shutdown the controller
4178  * @instance:				Adapter soft state
4179  * @opcode:				Shutdown/Hibernate
4180  */
4181 static void megasas_shutdown_controller(struct megasas_instance *instance,
4182 					u32 opcode)
4183 {
4184 	struct megasas_cmd *cmd;
4185 	struct megasas_dcmd_frame *dcmd;
4186 
4187 	if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
4188 		return;
4189 
4190 	cmd = megasas_get_cmd(instance);
4191 
4192 	if (!cmd)
4193 		return;
4194 
4195 	if (instance->aen_cmd)
4196 		megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
4197 	if (instance->map_update_cmd)
4198 		megasas_issue_blocked_abort_cmd(instance,
4199 						instance->map_update_cmd);
4200 	dcmd = &cmd->frame->dcmd;
4201 
4202 	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4203 
4204 	dcmd->cmd = MFI_CMD_DCMD;
4205 	dcmd->cmd_status = 0x0;
4206 	dcmd->sge_count = 0;
4207 	dcmd->flags = MFI_FRAME_DIR_NONE;
4208 	dcmd->timeout = 0;
4209 	dcmd->pad_0 = 0;
4210 	dcmd->data_xfer_len = 0;
4211 	dcmd->opcode = opcode;
4212 
4213 	megasas_issue_blocked_cmd(instance, cmd);
4214 
4215 	megasas_return_cmd(instance, cmd);
4216 
4217 	return;
4218 }
4219 
4220 #ifdef CONFIG_PM
4221 /**
4222  * megasas_suspend -	driver suspend entry point
4223  * @pdev:		PCI device structure
4224  * @state:		PCI power state to suspend routine
4225  */
4226 static int
4227 megasas_suspend(struct pci_dev *pdev, pm_message_t state)
4228 {
4229 	struct Scsi_Host *host;
4230 	struct megasas_instance *instance;
4231 
4232 	instance = pci_get_drvdata(pdev);
4233 	host = instance->host;
4234 	instance->unload = 1;
4235 
4236 	if (poll_mode_io)
4237 		del_timer_sync(&instance->io_completion_timer);
4238 
4239 	megasas_flush_cache(instance);
4240 	megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
4241 
4242 	/* cancel the delayed work if this work still in queue */
4243 	if (instance->ev != NULL) {
4244 		struct megasas_aen_event *ev = instance->ev;
4245 		cancel_delayed_work(
4246 			(struct delayed_work *)&ev->hotplug_work);
4247 		flush_scheduled_work();
4248 		instance->ev = NULL;
4249 	}
4250 
4251 	tasklet_kill(&instance->isr_tasklet);
4252 
4253 	pci_set_drvdata(instance->pdev, instance);
4254 	instance->instancet->disable_intr(instance->reg_set);
4255 	free_irq(instance->msi_flag ? instance->msixentry.vector :
4256 		 instance->pdev->irq, instance);
4257 	if (instance->msi_flag)
4258 		pci_disable_msix(instance->pdev);
4259 
4260 	pci_save_state(pdev);
4261 	pci_disable_device(pdev);
4262 
4263 	pci_set_power_state(pdev, pci_choose_state(pdev, state));
4264 
4265 	return 0;
4266 }
4267 
4268 /**
4269  * megasas_resume-      driver resume entry point
4270  * @pdev:               PCI device structure
4271  */
4272 static int
4273 megasas_resume(struct pci_dev *pdev)
4274 {
4275 	int rval;
4276 	struct Scsi_Host *host;
4277 	struct megasas_instance *instance;
4278 
4279 	instance = pci_get_drvdata(pdev);
4280 	host = instance->host;
4281 	pci_set_power_state(pdev, PCI_D0);
4282 	pci_enable_wake(pdev, PCI_D0, 0);
4283 	pci_restore_state(pdev);
4284 
4285 	/*
4286 	 * PCI prepping: enable device set bus mastering and dma mask
4287 	 */
4288 	rval = pci_enable_device_mem(pdev);
4289 
4290 	if (rval) {
4291 		printk(KERN_ERR "megasas: Enable device failed\n");
4292 		return rval;
4293 	}
4294 
4295 	pci_set_master(pdev);
4296 
4297 	if (megasas_set_dma_mask(pdev))
4298 		goto fail_set_dma_mask;
4299 
4300 	/*
4301 	 * Initialize MFI Firmware
4302 	 */
4303 
4304 	atomic_set(&instance->fw_outstanding, 0);
4305 
4306 	/*
4307 	 * We expect the FW state to be READY
4308 	 */
4309 	if (megasas_transition_to_ready(instance))
4310 		goto fail_ready_state;
4311 
4312 	switch (instance->pdev->device) {
4313 	case PCI_DEVICE_ID_LSI_FUSION:
4314 	{
4315 		megasas_reset_reply_desc(instance);
4316 		if (megasas_ioc_init_fusion(instance)) {
4317 			megasas_free_cmds(instance);
4318 			megasas_free_cmds_fusion(instance);
4319 			goto fail_init_mfi;
4320 		}
4321 		if (!megasas_get_map_info(instance))
4322 			megasas_sync_map_info(instance);
4323 	}
4324 	break;
4325 	default:
4326 		*instance->producer = 0;
4327 		*instance->consumer = 0;
4328 		if (megasas_issue_init_mfi(instance))
4329 			goto fail_init_mfi;
4330 		break;
4331 	}
4332 
4333 	tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
4334 		     (unsigned long)instance);
4335 
4336 	/* Now re-enable MSI-X */
4337 	if (instance->msi_flag)
4338 		pci_enable_msix(instance->pdev, &instance->msixentry, 1);
4339 
4340 	/*
4341 	 * Register IRQ
4342 	 */
4343 	if (request_irq(instance->msi_flag ? instance->msixentry.vector :
4344 			pdev->irq, instance->instancet->service_isr,
4345 			IRQF_SHARED, "megasas", instance)) {
4346 		printk(KERN_ERR "megasas: Failed to register IRQ\n");
4347 		goto fail_irq;
4348 	}
4349 
4350 	instance->instancet->enable_intr(instance->reg_set);
4351 
4352 	/*
4353 	 * Initiate AEN (Asynchronous Event Notification)
4354 	 */
4355 	if (megasas_start_aen(instance))
4356 		printk(KERN_ERR "megasas: Start AEN failed\n");
4357 
4358 	/* Initialize the cmd completion timer */
4359 	if (poll_mode_io)
4360 		megasas_start_timer(instance, &instance->io_completion_timer,
4361 				megasas_io_completion_timer,
4362 				MEGASAS_COMPLETION_TIMER_INTERVAL);
4363 	instance->unload = 0;
4364 
4365 	return 0;
4366 
4367 fail_irq:
4368 fail_init_mfi:
4369 	if (instance->evt_detail)
4370 		pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
4371 				instance->evt_detail,
4372 				instance->evt_detail_h);
4373 
4374 	if (instance->producer)
4375 		pci_free_consistent(pdev, sizeof(u32), instance->producer,
4376 				instance->producer_h);
4377 	if (instance->consumer)
4378 		pci_free_consistent(pdev, sizeof(u32), instance->consumer,
4379 				instance->consumer_h);
4380 	scsi_host_put(host);
4381 
4382 fail_set_dma_mask:
4383 fail_ready_state:
4384 
4385 	pci_disable_device(pdev);
4386 
4387 	return -ENODEV;
4388 }
4389 #else
4390 #define megasas_suspend	NULL
4391 #define megasas_resume	NULL
4392 #endif
4393 
4394 /**
4395  * megasas_detach_one -	PCI hot"un"plug entry point
4396  * @pdev:		PCI device structure
4397  */
4398 static void __devexit megasas_detach_one(struct pci_dev *pdev)
4399 {
4400 	int i;
4401 	struct Scsi_Host *host;
4402 	struct megasas_instance *instance;
4403 	struct fusion_context *fusion;
4404 
4405 	instance = pci_get_drvdata(pdev);
4406 	instance->unload = 1;
4407 	host = instance->host;
4408 	fusion = instance->ctrl_context;
4409 
4410 	if (poll_mode_io)
4411 		del_timer_sync(&instance->io_completion_timer);
4412 
4413 	scsi_remove_host(instance->host);
4414 	megasas_flush_cache(instance);
4415 	megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
4416 
4417 	/* cancel the delayed work if this work still in queue*/
4418 	if (instance->ev != NULL) {
4419 		struct megasas_aen_event *ev = instance->ev;
4420 		cancel_delayed_work(
4421 			(struct delayed_work *)&ev->hotplug_work);
4422 		flush_scheduled_work();
4423 		instance->ev = NULL;
4424 	}
4425 
4426 	tasklet_kill(&instance->isr_tasklet);
4427 
4428 	/*
4429 	 * Take the instance off the instance array. Note that we will not
4430 	 * decrement the max_index. We let this array be sparse array
4431 	 */
4432 	for (i = 0; i < megasas_mgmt_info.max_index; i++) {
4433 		if (megasas_mgmt_info.instance[i] == instance) {
4434 			megasas_mgmt_info.count--;
4435 			megasas_mgmt_info.instance[i] = NULL;
4436 
4437 			break;
4438 		}
4439 	}
4440 
4441 	pci_set_drvdata(instance->pdev, NULL);
4442 
4443 	instance->instancet->disable_intr(instance->reg_set);
4444 
4445 	free_irq(instance->msi_flag ? instance->msixentry.vector :
4446 		 instance->pdev->irq, instance);
4447 	if (instance->msi_flag)
4448 		pci_disable_msix(instance->pdev);
4449 
4450 	switch (instance->pdev->device) {
4451 	case PCI_DEVICE_ID_LSI_FUSION:
4452 		megasas_release_fusion(instance);
4453 		for (i = 0; i < 2 ; i++)
4454 			if (fusion->ld_map[i])
4455 				dma_free_coherent(&instance->pdev->dev,
4456 						  fusion->map_sz,
4457 						  fusion->ld_map[i],
4458 						  fusion->
4459 						  ld_map_phys[i]);
4460 		kfree(instance->ctrl_context);
4461 		break;
4462 	default:
4463 		megasas_release_mfi(instance);
4464 		pci_free_consistent(pdev,
4465 				    sizeof(struct megasas_evt_detail),
4466 				    instance->evt_detail,
4467 				    instance->evt_detail_h);
4468 		pci_free_consistent(pdev, sizeof(u32),
4469 				    instance->producer,
4470 				    instance->producer_h);
4471 		pci_free_consistent(pdev, sizeof(u32),
4472 				    instance->consumer,
4473 				    instance->consumer_h);
4474 		break;
4475 	}
4476 
4477 	scsi_host_put(host);
4478 
4479 	pci_set_drvdata(pdev, NULL);
4480 
4481 	pci_disable_device(pdev);
4482 
4483 	return;
4484 }
4485 
4486 /**
4487  * megasas_shutdown -	Shutdown entry point
4488  * @device:		Generic device structure
4489  */
4490 static void megasas_shutdown(struct pci_dev *pdev)
4491 {
4492 	struct megasas_instance *instance = pci_get_drvdata(pdev);
4493 	instance->unload = 1;
4494 	megasas_flush_cache(instance);
4495 	megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
4496 }
4497 
4498 /**
4499  * megasas_mgmt_open -	char node "open" entry point
4500  */
4501 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
4502 {
4503 	/*
4504 	 * Allow only those users with admin rights
4505 	 */
4506 	if (!capable(CAP_SYS_ADMIN))
4507 		return -EACCES;
4508 
4509 	return 0;
4510 }
4511 
4512 /**
4513  * megasas_mgmt_fasync -	Async notifier registration from applications
4514  *
4515  * This function adds the calling process to a driver global queue. When an
4516  * event occurs, SIGIO will be sent to all processes in this queue.
4517  */
4518 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
4519 {
4520 	int rc;
4521 
4522 	mutex_lock(&megasas_async_queue_mutex);
4523 
4524 	rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
4525 
4526 	mutex_unlock(&megasas_async_queue_mutex);
4527 
4528 	if (rc >= 0) {
4529 		/* For sanity check when we get ioctl */
4530 		filep->private_data = filep;
4531 		return 0;
4532 	}
4533 
4534 	printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
4535 
4536 	return rc;
4537 }
4538 
4539 /**
4540  * megasas_mgmt_poll -  char node "poll" entry point
4541  * */
4542 static unsigned int megasas_mgmt_poll(struct file *file, poll_table *wait)
4543 {
4544 	unsigned int mask;
4545 	unsigned long flags;
4546 	poll_wait(file, &megasas_poll_wait, wait);
4547 	spin_lock_irqsave(&poll_aen_lock, flags);
4548 	if (megasas_poll_wait_aen)
4549 		mask =   (POLLIN | POLLRDNORM);
4550 	else
4551 		mask = 0;
4552 	spin_unlock_irqrestore(&poll_aen_lock, flags);
4553 	return mask;
4554 }
4555 
4556 /**
4557  * megasas_mgmt_fw_ioctl -	Issues management ioctls to FW
4558  * @instance:			Adapter soft state
4559  * @argp:			User's ioctl packet
4560  */
4561 static int
4562 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
4563 		      struct megasas_iocpacket __user * user_ioc,
4564 		      struct megasas_iocpacket *ioc)
4565 {
4566 	struct megasas_sge32 *kern_sge32;
4567 	struct megasas_cmd *cmd;
4568 	void *kbuff_arr[MAX_IOCTL_SGE];
4569 	dma_addr_t buf_handle = 0;
4570 	int error = 0, i;
4571 	void *sense = NULL;
4572 	dma_addr_t sense_handle;
4573 	unsigned long *sense_ptr;
4574 
4575 	memset(kbuff_arr, 0, sizeof(kbuff_arr));
4576 
4577 	if (ioc->sge_count > MAX_IOCTL_SGE) {
4578 		printk(KERN_DEBUG "megasas: SGE count [%d] >  max limit [%d]\n",
4579 		       ioc->sge_count, MAX_IOCTL_SGE);
4580 		return -EINVAL;
4581 	}
4582 
4583 	cmd = megasas_get_cmd(instance);
4584 	if (!cmd) {
4585 		printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
4586 		return -ENOMEM;
4587 	}
4588 
4589 	/*
4590 	 * User's IOCTL packet has 2 frames (maximum). Copy those two
4591 	 * frames into our cmd's frames. cmd->frame's context will get
4592 	 * overwritten when we copy from user's frames. So set that value
4593 	 * alone separately
4594 	 */
4595 	memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
4596 	cmd->frame->hdr.context = cmd->index;
4597 	cmd->frame->hdr.pad_0 = 0;
4598 
4599 	/*
4600 	 * The management interface between applications and the fw uses
4601 	 * MFI frames. E.g, RAID configuration changes, LD property changes
4602 	 * etc are accomplishes through different kinds of MFI frames. The
4603 	 * driver needs to care only about substituting user buffers with
4604 	 * kernel buffers in SGLs. The location of SGL is embedded in the
4605 	 * struct iocpacket itself.
4606 	 */
4607 	kern_sge32 = (struct megasas_sge32 *)
4608 	    ((unsigned long)cmd->frame + ioc->sgl_off);
4609 
4610 	/*
4611 	 * For each user buffer, create a mirror buffer and copy in
4612 	 */
4613 	for (i = 0; i < ioc->sge_count; i++) {
4614 		kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
4615 						    ioc->sgl[i].iov_len,
4616 						    &buf_handle, GFP_KERNEL);
4617 		if (!kbuff_arr[i]) {
4618 			printk(KERN_DEBUG "megasas: Failed to alloc "
4619 			       "kernel SGL buffer for IOCTL \n");
4620 			error = -ENOMEM;
4621 			goto out;
4622 		}
4623 
4624 		/*
4625 		 * We don't change the dma_coherent_mask, so
4626 		 * pci_alloc_consistent only returns 32bit addresses
4627 		 */
4628 		kern_sge32[i].phys_addr = (u32) buf_handle;
4629 		kern_sge32[i].length = ioc->sgl[i].iov_len;
4630 
4631 		/*
4632 		 * We created a kernel buffer corresponding to the
4633 		 * user buffer. Now copy in from the user buffer
4634 		 */
4635 		if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
4636 				   (u32) (ioc->sgl[i].iov_len))) {
4637 			error = -EFAULT;
4638 			goto out;
4639 		}
4640 	}
4641 
4642 	if (ioc->sense_len) {
4643 		sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
4644 					     &sense_handle, GFP_KERNEL);
4645 		if (!sense) {
4646 			error = -ENOMEM;
4647 			goto out;
4648 		}
4649 
4650 		sense_ptr =
4651 		(unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
4652 		*sense_ptr = sense_handle;
4653 	}
4654 
4655 	/*
4656 	 * Set the sync_cmd flag so that the ISR knows not to complete this
4657 	 * cmd to the SCSI mid-layer
4658 	 */
4659 	cmd->sync_cmd = 1;
4660 	megasas_issue_blocked_cmd(instance, cmd);
4661 	cmd->sync_cmd = 0;
4662 
4663 	/*
4664 	 * copy out the kernel buffers to user buffers
4665 	 */
4666 	for (i = 0; i < ioc->sge_count; i++) {
4667 		if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
4668 				 ioc->sgl[i].iov_len)) {
4669 			error = -EFAULT;
4670 			goto out;
4671 		}
4672 	}
4673 
4674 	/*
4675 	 * copy out the sense
4676 	 */
4677 	if (ioc->sense_len) {
4678 		/*
4679 		 * sense_ptr points to the location that has the user
4680 		 * sense buffer address
4681 		 */
4682 		sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
4683 				ioc->sense_off);
4684 
4685 		if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
4686 				 sense, ioc->sense_len)) {
4687 			printk(KERN_ERR "megasas: Failed to copy out to user "
4688 					"sense data\n");
4689 			error = -EFAULT;
4690 			goto out;
4691 		}
4692 	}
4693 
4694 	/*
4695 	 * copy the status codes returned by the fw
4696 	 */
4697 	if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
4698 			 &cmd->frame->hdr.cmd_status, sizeof(u8))) {
4699 		printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
4700 		error = -EFAULT;
4701 	}
4702 
4703       out:
4704 	if (sense) {
4705 		dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
4706 				    sense, sense_handle);
4707 	}
4708 
4709 	for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
4710 		dma_free_coherent(&instance->pdev->dev,
4711 				    kern_sge32[i].length,
4712 				    kbuff_arr[i], kern_sge32[i].phys_addr);
4713 	}
4714 
4715 	megasas_return_cmd(instance, cmd);
4716 	return error;
4717 }
4718 
4719 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
4720 {
4721 	struct megasas_iocpacket __user *user_ioc =
4722 	    (struct megasas_iocpacket __user *)arg;
4723 	struct megasas_iocpacket *ioc;
4724 	struct megasas_instance *instance;
4725 	int error;
4726 	int i;
4727 	unsigned long flags;
4728 	u32 wait_time = MEGASAS_RESET_WAIT_TIME;
4729 
4730 	ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
4731 	if (!ioc)
4732 		return -ENOMEM;
4733 
4734 	if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
4735 		error = -EFAULT;
4736 		goto out_kfree_ioc;
4737 	}
4738 
4739 	instance = megasas_lookup_instance(ioc->host_no);
4740 	if (!instance) {
4741 		error = -ENODEV;
4742 		goto out_kfree_ioc;
4743 	}
4744 
4745 	if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
4746 		printk(KERN_ERR "Controller in crit error\n");
4747 		error = -ENODEV;
4748 		goto out_kfree_ioc;
4749 	}
4750 
4751 	if (instance->unload == 1) {
4752 		error = -ENODEV;
4753 		goto out_kfree_ioc;
4754 	}
4755 
4756 	/*
4757 	 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
4758 	 */
4759 	if (down_interruptible(&instance->ioctl_sem)) {
4760 		error = -ERESTARTSYS;
4761 		goto out_kfree_ioc;
4762 	}
4763 
4764 	for (i = 0; i < wait_time; i++) {
4765 
4766 		spin_lock_irqsave(&instance->hba_lock, flags);
4767 		if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
4768 			spin_unlock_irqrestore(&instance->hba_lock, flags);
4769 			break;
4770 		}
4771 		spin_unlock_irqrestore(&instance->hba_lock, flags);
4772 
4773 		if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
4774 			printk(KERN_NOTICE "megasas: waiting"
4775 				"for controller reset to finish\n");
4776 		}
4777 
4778 		msleep(1000);
4779 	}
4780 
4781 	spin_lock_irqsave(&instance->hba_lock, flags);
4782 	if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
4783 		spin_unlock_irqrestore(&instance->hba_lock, flags);
4784 
4785 		printk(KERN_ERR "megaraid_sas: timed out while"
4786 			"waiting for HBA to recover\n");
4787 		error = -ENODEV;
4788 		goto out_kfree_ioc;
4789 	}
4790 	spin_unlock_irqrestore(&instance->hba_lock, flags);
4791 
4792 	error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
4793 	up(&instance->ioctl_sem);
4794 
4795       out_kfree_ioc:
4796 	kfree(ioc);
4797 	return error;
4798 }
4799 
4800 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
4801 {
4802 	struct megasas_instance *instance;
4803 	struct megasas_aen aen;
4804 	int error;
4805 	int i;
4806 	unsigned long flags;
4807 	u32 wait_time = MEGASAS_RESET_WAIT_TIME;
4808 
4809 	if (file->private_data != file) {
4810 		printk(KERN_DEBUG "megasas: fasync_helper was not "
4811 		       "called first\n");
4812 		return -EINVAL;
4813 	}
4814 
4815 	if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
4816 		return -EFAULT;
4817 
4818 	instance = megasas_lookup_instance(aen.host_no);
4819 
4820 	if (!instance)
4821 		return -ENODEV;
4822 
4823 	if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
4824 		return -ENODEV;
4825 	}
4826 
4827 	if (instance->unload == 1) {
4828 		return -ENODEV;
4829 	}
4830 
4831 	for (i = 0; i < wait_time; i++) {
4832 
4833 		spin_lock_irqsave(&instance->hba_lock, flags);
4834 		if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
4835 			spin_unlock_irqrestore(&instance->hba_lock,
4836 						flags);
4837 			break;
4838 		}
4839 
4840 		spin_unlock_irqrestore(&instance->hba_lock, flags);
4841 
4842 		if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
4843 			printk(KERN_NOTICE "megasas: waiting for"
4844 				"controller reset to finish\n");
4845 		}
4846 
4847 		msleep(1000);
4848 	}
4849 
4850 	spin_lock_irqsave(&instance->hba_lock, flags);
4851 	if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
4852 		spin_unlock_irqrestore(&instance->hba_lock, flags);
4853 		printk(KERN_ERR "megaraid_sas: timed out while waiting"
4854 				"for HBA to recover.\n");
4855 		return -ENODEV;
4856 	}
4857 	spin_unlock_irqrestore(&instance->hba_lock, flags);
4858 
4859 	mutex_lock(&instance->aen_mutex);
4860 	error = megasas_register_aen(instance, aen.seq_num,
4861 				     aen.class_locale_word);
4862 	mutex_unlock(&instance->aen_mutex);
4863 	return error;
4864 }
4865 
4866 /**
4867  * megasas_mgmt_ioctl -	char node ioctl entry point
4868  */
4869 static long
4870 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
4871 {
4872 	switch (cmd) {
4873 	case MEGASAS_IOC_FIRMWARE:
4874 		return megasas_mgmt_ioctl_fw(file, arg);
4875 
4876 	case MEGASAS_IOC_GET_AEN:
4877 		return megasas_mgmt_ioctl_aen(file, arg);
4878 	}
4879 
4880 	return -ENOTTY;
4881 }
4882 
4883 #ifdef CONFIG_COMPAT
4884 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
4885 {
4886 	struct compat_megasas_iocpacket __user *cioc =
4887 	    (struct compat_megasas_iocpacket __user *)arg;
4888 	struct megasas_iocpacket __user *ioc =
4889 	    compat_alloc_user_space(sizeof(struct megasas_iocpacket));
4890 	int i;
4891 	int error = 0;
4892 	compat_uptr_t ptr;
4893 
4894 	if (clear_user(ioc, sizeof(*ioc)))
4895 		return -EFAULT;
4896 
4897 	if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
4898 	    copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
4899 	    copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
4900 	    copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
4901 	    copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
4902 	    copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
4903 		return -EFAULT;
4904 
4905 	/*
4906 	 * The sense_ptr is used in megasas_mgmt_fw_ioctl only when
4907 	 * sense_len is not null, so prepare the 64bit value under
4908 	 * the same condition.
4909 	 */
4910 	if (ioc->sense_len) {
4911 		void __user **sense_ioc_ptr =
4912 			(void __user **)(ioc->frame.raw + ioc->sense_off);
4913 		compat_uptr_t *sense_cioc_ptr =
4914 			(compat_uptr_t *)(cioc->frame.raw + cioc->sense_off);
4915 		if (get_user(ptr, sense_cioc_ptr) ||
4916 		    put_user(compat_ptr(ptr), sense_ioc_ptr))
4917 			return -EFAULT;
4918 	}
4919 
4920 	for (i = 0; i < MAX_IOCTL_SGE; i++) {
4921 		if (get_user(ptr, &cioc->sgl[i].iov_base) ||
4922 		    put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
4923 		    copy_in_user(&ioc->sgl[i].iov_len,
4924 				 &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
4925 			return -EFAULT;
4926 	}
4927 
4928 	error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
4929 
4930 	if (copy_in_user(&cioc->frame.hdr.cmd_status,
4931 			 &ioc->frame.hdr.cmd_status, sizeof(u8))) {
4932 		printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
4933 		return -EFAULT;
4934 	}
4935 	return error;
4936 }
4937 
4938 static long
4939 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
4940 			  unsigned long arg)
4941 {
4942 	switch (cmd) {
4943 	case MEGASAS_IOC_FIRMWARE32:
4944 		return megasas_mgmt_compat_ioctl_fw(file, arg);
4945 	case MEGASAS_IOC_GET_AEN:
4946 		return megasas_mgmt_ioctl_aen(file, arg);
4947 	}
4948 
4949 	return -ENOTTY;
4950 }
4951 #endif
4952 
4953 /*
4954  * File operations structure for management interface
4955  */
4956 static const struct file_operations megasas_mgmt_fops = {
4957 	.owner = THIS_MODULE,
4958 	.open = megasas_mgmt_open,
4959 	.fasync = megasas_mgmt_fasync,
4960 	.unlocked_ioctl = megasas_mgmt_ioctl,
4961 	.poll = megasas_mgmt_poll,
4962 #ifdef CONFIG_COMPAT
4963 	.compat_ioctl = megasas_mgmt_compat_ioctl,
4964 #endif
4965 	.llseek = noop_llseek,
4966 };
4967 
4968 /*
4969  * PCI hotplug support registration structure
4970  */
4971 static struct pci_driver megasas_pci_driver = {
4972 
4973 	.name = "megaraid_sas",
4974 	.id_table = megasas_pci_table,
4975 	.probe = megasas_probe_one,
4976 	.remove = __devexit_p(megasas_detach_one),
4977 	.suspend = megasas_suspend,
4978 	.resume = megasas_resume,
4979 	.shutdown = megasas_shutdown,
4980 };
4981 
4982 /*
4983  * Sysfs driver attributes
4984  */
4985 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
4986 {
4987 	return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
4988 			MEGASAS_VERSION);
4989 }
4990 
4991 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
4992 
4993 static ssize_t
4994 megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
4995 {
4996 	return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
4997 			MEGASAS_RELDATE);
4998 }
4999 
5000 static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
5001 		   NULL);
5002 
5003 static ssize_t
5004 megasas_sysfs_show_support_poll_for_event(struct device_driver *dd, char *buf)
5005 {
5006 	return sprintf(buf, "%u\n", support_poll_for_event);
5007 }
5008 
5009 static DRIVER_ATTR(support_poll_for_event, S_IRUGO,
5010 			megasas_sysfs_show_support_poll_for_event, NULL);
5011 
5012  static ssize_t
5013 megasas_sysfs_show_support_device_change(struct device_driver *dd, char *buf)
5014 {
5015 	return sprintf(buf, "%u\n", support_device_change);
5016 }
5017 
5018 static DRIVER_ATTR(support_device_change, S_IRUGO,
5019 			megasas_sysfs_show_support_device_change, NULL);
5020 
5021 static ssize_t
5022 megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
5023 {
5024 	return sprintf(buf, "%u\n", megasas_dbg_lvl);
5025 }
5026 
5027 static ssize_t
5028 megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count)
5029 {
5030 	int retval = count;
5031 	if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){
5032 		printk(KERN_ERR "megasas: could not set dbg_lvl\n");
5033 		retval = -EINVAL;
5034 	}
5035 	return retval;
5036 }
5037 
5038 static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUSR, megasas_sysfs_show_dbg_lvl,
5039 		megasas_sysfs_set_dbg_lvl);
5040 
5041 static ssize_t
5042 megasas_sysfs_show_poll_mode_io(struct device_driver *dd, char *buf)
5043 {
5044 	return sprintf(buf, "%u\n", poll_mode_io);
5045 }
5046 
5047 static ssize_t
5048 megasas_sysfs_set_poll_mode_io(struct device_driver *dd,
5049 				const char *buf, size_t count)
5050 {
5051 	int retval = count;
5052 	int tmp = poll_mode_io;
5053 	int i;
5054 	struct megasas_instance *instance;
5055 
5056 	if (sscanf(buf, "%u", &poll_mode_io) < 1) {
5057 		printk(KERN_ERR "megasas: could not set poll_mode_io\n");
5058 		retval = -EINVAL;
5059 	}
5060 
5061 	/*
5062 	 * Check if poll_mode_io is already set or is same as previous value
5063 	 */
5064 	if ((tmp && poll_mode_io) || (tmp == poll_mode_io))
5065 		goto out;
5066 
5067 	if (poll_mode_io) {
5068 		/*
5069 		 * Start timers for all adapters
5070 		 */
5071 		for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5072 			instance = megasas_mgmt_info.instance[i];
5073 			if (instance) {
5074 				megasas_start_timer(instance,
5075 					&instance->io_completion_timer,
5076 					megasas_io_completion_timer,
5077 					MEGASAS_COMPLETION_TIMER_INTERVAL);
5078 			}
5079 		}
5080 	} else {
5081 		/*
5082 		 * Delete timers for all adapters
5083 		 */
5084 		for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5085 			instance = megasas_mgmt_info.instance[i];
5086 			if (instance)
5087 				del_timer_sync(&instance->io_completion_timer);
5088 		}
5089 	}
5090 
5091 out:
5092 	return retval;
5093 }
5094 
5095 static void
5096 megasas_aen_polling(struct work_struct *work)
5097 {
5098 	struct megasas_aen_event *ev =
5099 		container_of(work, struct megasas_aen_event, hotplug_work);
5100 	struct megasas_instance *instance = ev->instance;
5101 	union megasas_evt_class_locale class_locale;
5102 	struct  Scsi_Host *host;
5103 	struct  scsi_device *sdev1;
5104 	u16     pd_index = 0;
5105 	u16	ld_index = 0;
5106 	int     i, j, doscan = 0;
5107 	u32 seq_num;
5108 	int error;
5109 
5110 	if (!instance) {
5111 		printk(KERN_ERR "invalid instance!\n");
5112 		kfree(ev);
5113 		return;
5114 	}
5115 	instance->ev = NULL;
5116 	host = instance->host;
5117 	if (instance->evt_detail) {
5118 
5119 		switch (instance->evt_detail->code) {
5120 		case MR_EVT_PD_INSERTED:
5121 			if (megasas_get_pd_list(instance) == 0) {
5122 			for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
5123 				for (j = 0;
5124 				j < MEGASAS_MAX_DEV_PER_CHANNEL;
5125 				j++) {
5126 
5127 				pd_index =
5128 				(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5129 
5130 				sdev1 =
5131 				scsi_device_lookup(host, i, j, 0);
5132 
5133 				if (instance->pd_list[pd_index].driveState
5134 						== MR_PD_STATE_SYSTEM) {
5135 						if (!sdev1) {
5136 						scsi_add_device(host, i, j, 0);
5137 						}
5138 
5139 					if (sdev1)
5140 						scsi_device_put(sdev1);
5141 					}
5142 				}
5143 			}
5144 			}
5145 			doscan = 0;
5146 			break;
5147 
5148 		case MR_EVT_PD_REMOVED:
5149 			if (megasas_get_pd_list(instance) == 0) {
5150 			megasas_get_pd_list(instance);
5151 			for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
5152 				for (j = 0;
5153 				j < MEGASAS_MAX_DEV_PER_CHANNEL;
5154 				j++) {
5155 
5156 				pd_index =
5157 				(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5158 
5159 				sdev1 =
5160 				scsi_device_lookup(host, i, j, 0);
5161 
5162 				if (instance->pd_list[pd_index].driveState
5163 					== MR_PD_STATE_SYSTEM) {
5164 					if (sdev1) {
5165 						scsi_device_put(sdev1);
5166 					}
5167 				} else {
5168 					if (sdev1) {
5169 						scsi_remove_device(sdev1);
5170 						scsi_device_put(sdev1);
5171 					}
5172 				}
5173 				}
5174 			}
5175 			}
5176 			doscan = 0;
5177 			break;
5178 
5179 		case MR_EVT_LD_OFFLINE:
5180 		case MR_EVT_LD_DELETED:
5181 			megasas_get_ld_list(instance);
5182 			for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
5183 				for (j = 0;
5184 				j < MEGASAS_MAX_DEV_PER_CHANNEL;
5185 				j++) {
5186 
5187 				ld_index =
5188 				(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5189 
5190 				sdev1 = scsi_device_lookup(host,
5191 					i + MEGASAS_MAX_LD_CHANNELS,
5192 					j,
5193 					0);
5194 
5195 				if (instance->ld_ids[ld_index] != 0xff) {
5196 					if (sdev1) {
5197 						scsi_device_put(sdev1);
5198 					}
5199 				} else {
5200 					if (sdev1) {
5201 						scsi_remove_device(sdev1);
5202 						scsi_device_put(sdev1);
5203 					}
5204 				}
5205 				}
5206 			}
5207 			doscan = 0;
5208 			break;
5209 		case MR_EVT_LD_CREATED:
5210 			megasas_get_ld_list(instance);
5211 			for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
5212 				for (j = 0;
5213 					j < MEGASAS_MAX_DEV_PER_CHANNEL;
5214 					j++) {
5215 					ld_index =
5216 					(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5217 
5218 					sdev1 = scsi_device_lookup(host,
5219 						i+MEGASAS_MAX_LD_CHANNELS,
5220 						j, 0);
5221 
5222 					if (instance->ld_ids[ld_index] !=
5223 								0xff) {
5224 						if (!sdev1) {
5225 							scsi_add_device(host,
5226 								i + 2,
5227 								j, 0);
5228 						}
5229 					}
5230 					if (sdev1) {
5231 						scsi_device_put(sdev1);
5232 					}
5233 				}
5234 			}
5235 			doscan = 0;
5236 			break;
5237 		case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
5238 		case MR_EVT_FOREIGN_CFG_IMPORTED:
5239 		case MR_EVT_LD_STATE_CHANGE:
5240 			doscan = 1;
5241 			break;
5242 		default:
5243 			doscan = 0;
5244 			break;
5245 		}
5246 	} else {
5247 		printk(KERN_ERR "invalid evt_detail!\n");
5248 		kfree(ev);
5249 		return;
5250 	}
5251 
5252 	if (doscan) {
5253 		printk(KERN_INFO "scanning ...\n");
5254 		megasas_get_pd_list(instance);
5255 		for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
5256 			for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
5257 				pd_index = i*MEGASAS_MAX_DEV_PER_CHANNEL + j;
5258 				sdev1 = scsi_device_lookup(host, i, j, 0);
5259 				if (instance->pd_list[pd_index].driveState ==
5260 							MR_PD_STATE_SYSTEM) {
5261 					if (!sdev1) {
5262 						scsi_add_device(host, i, j, 0);
5263 					}
5264 					if (sdev1)
5265 						scsi_device_put(sdev1);
5266 				} else {
5267 					if (sdev1) {
5268 						scsi_remove_device(sdev1);
5269 						scsi_device_put(sdev1);
5270 					}
5271 				}
5272 			}
5273 		}
5274 
5275 		megasas_get_ld_list(instance);
5276 		for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
5277 			for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
5278 				ld_index =
5279 				(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
5280 
5281 				sdev1 = scsi_device_lookup(host,
5282 					i+MEGASAS_MAX_LD_CHANNELS, j, 0);
5283 				if (instance->ld_ids[ld_index] != 0xff) {
5284 					if (!sdev1) {
5285 						scsi_add_device(host,
5286 								i+2,
5287 								j, 0);
5288 					} else {
5289 						scsi_device_put(sdev1);
5290 					}
5291 				} else {
5292 					if (sdev1) {
5293 						scsi_remove_device(sdev1);
5294 						scsi_device_put(sdev1);
5295 					}
5296 				}
5297 			}
5298 		}
5299 	}
5300 
5301 	if ( instance->aen_cmd != NULL ) {
5302 		kfree(ev);
5303 		return ;
5304 	}
5305 
5306 	seq_num = instance->evt_detail->seq_num + 1;
5307 
5308 	/* Register AEN with FW for latest sequence number plus 1 */
5309 	class_locale.members.reserved = 0;
5310 	class_locale.members.locale = MR_EVT_LOCALE_ALL;
5311 	class_locale.members.class = MR_EVT_CLASS_DEBUG;
5312 	mutex_lock(&instance->aen_mutex);
5313 	error = megasas_register_aen(instance, seq_num,
5314 					class_locale.word);
5315 	mutex_unlock(&instance->aen_mutex);
5316 
5317 	if (error)
5318 		printk(KERN_ERR "register aen failed error %x\n", error);
5319 
5320 	kfree(ev);
5321 }
5322 
5323 
5324 static DRIVER_ATTR(poll_mode_io, S_IRUGO|S_IWUSR,
5325 		megasas_sysfs_show_poll_mode_io,
5326 		megasas_sysfs_set_poll_mode_io);
5327 
5328 /**
5329  * megasas_init - Driver load entry point
5330  */
5331 static int __init megasas_init(void)
5332 {
5333 	int rval;
5334 
5335 	/*
5336 	 * Announce driver version and other information
5337 	 */
5338 	printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
5339 	       MEGASAS_EXT_VERSION);
5340 
5341 	support_poll_for_event = 2;
5342 	support_device_change = 1;
5343 
5344 	memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
5345 
5346 	/*
5347 	 * Register character device node
5348 	 */
5349 	rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
5350 
5351 	if (rval < 0) {
5352 		printk(KERN_DEBUG "megasas: failed to open device node\n");
5353 		return rval;
5354 	}
5355 
5356 	megasas_mgmt_majorno = rval;
5357 
5358 	/*
5359 	 * Register ourselves as PCI hotplug module
5360 	 */
5361 	rval = pci_register_driver(&megasas_pci_driver);
5362 
5363 	if (rval) {
5364 		printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
5365 		goto err_pcidrv;
5366 	}
5367 
5368 	rval = driver_create_file(&megasas_pci_driver.driver,
5369 				  &driver_attr_version);
5370 	if (rval)
5371 		goto err_dcf_attr_ver;
5372 	rval = driver_create_file(&megasas_pci_driver.driver,
5373 				  &driver_attr_release_date);
5374 	if (rval)
5375 		goto err_dcf_rel_date;
5376 
5377 	rval = driver_create_file(&megasas_pci_driver.driver,
5378 				&driver_attr_support_poll_for_event);
5379 	if (rval)
5380 		goto err_dcf_support_poll_for_event;
5381 
5382 	rval = driver_create_file(&megasas_pci_driver.driver,
5383 				  &driver_attr_dbg_lvl);
5384 	if (rval)
5385 		goto err_dcf_dbg_lvl;
5386 	rval = driver_create_file(&megasas_pci_driver.driver,
5387 				  &driver_attr_poll_mode_io);
5388 	if (rval)
5389 		goto err_dcf_poll_mode_io;
5390 
5391 	rval = driver_create_file(&megasas_pci_driver.driver,
5392 				&driver_attr_support_device_change);
5393 	if (rval)
5394 		goto err_dcf_support_device_change;
5395 
5396 	return rval;
5397 
5398 err_dcf_support_device_change:
5399 	driver_remove_file(&megasas_pci_driver.driver,
5400 		  &driver_attr_poll_mode_io);
5401 
5402 err_dcf_poll_mode_io:
5403 	driver_remove_file(&megasas_pci_driver.driver,
5404 			   &driver_attr_dbg_lvl);
5405 err_dcf_dbg_lvl:
5406 	driver_remove_file(&megasas_pci_driver.driver,
5407 			&driver_attr_support_poll_for_event);
5408 
5409 err_dcf_support_poll_for_event:
5410 	driver_remove_file(&megasas_pci_driver.driver,
5411 			   &driver_attr_release_date);
5412 
5413 err_dcf_rel_date:
5414 	driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
5415 err_dcf_attr_ver:
5416 	pci_unregister_driver(&megasas_pci_driver);
5417 err_pcidrv:
5418 	unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
5419 	return rval;
5420 }
5421 
5422 /**
5423  * megasas_exit - Driver unload entry point
5424  */
5425 static void __exit megasas_exit(void)
5426 {
5427 	driver_remove_file(&megasas_pci_driver.driver,
5428 			   &driver_attr_poll_mode_io);
5429 	driver_remove_file(&megasas_pci_driver.driver,
5430 			   &driver_attr_dbg_lvl);
5431 	driver_remove_file(&megasas_pci_driver.driver,
5432 			&driver_attr_support_poll_for_event);
5433 	driver_remove_file(&megasas_pci_driver.driver,
5434 			&driver_attr_support_device_change);
5435 	driver_remove_file(&megasas_pci_driver.driver,
5436 			   &driver_attr_release_date);
5437 	driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
5438 
5439 	pci_unregister_driver(&megasas_pci_driver);
5440 	unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
5441 }
5442 
5443 module_init(megasas_init);
5444 module_exit(megasas_exit);
5445