xref: /linux/drivers/scsi/megaraid.c (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *
4  *			Linux MegaRAID device driver
5  *
6  * Copyright (c) 2002  LSI Logic Corporation.
7  *
8  * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
9  *	  - fixes
10  *	  - speed-ups (list handling fixes, issued_list, optimizations.)
11  *	  - lots of cleanups.
12  *
13  * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
14  *	  - new-style, hotplug-aware pci probing and scsi registration
15  *
16  * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
17  * 						<Seokmann.Ju@lsil.com>
18  *
19  * Description: Linux device driver for LSI Logic MegaRAID controller
20  *
21  * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
22  *					518, 520, 531, 532
23  *
24  * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
25  * and others. Please send updates to the mailing list
26  * linux-scsi@vger.kernel.org .
27  */
28 
29 #include <linux/mm.h>
30 #include <linux/fs.h>
31 #include <linux/blkdev.h>
32 #include <linux/uaccess.h>
33 #include <asm/io.h>
34 #include <linux/completion.h>
35 #include <linux/delay.h>
36 #include <linux/proc_fs.h>
37 #include <linux/seq_file.h>
38 #include <linux/reboot.h>
39 #include <linux/module.h>
40 #include <linux/list.h>
41 #include <linux/interrupt.h>
42 #include <linux/pci.h>
43 #include <linux/init.h>
44 #include <linux/dma-mapping.h>
45 #include <linux/mutex.h>
46 #include <linux/slab.h>
47 
48 #include <scsi/scsi.h>
49 #include <scsi/scsi_cmnd.h>
50 #include <scsi/scsi_device.h>
51 #include <scsi/scsi_eh.h>
52 #include <scsi/scsi_host.h>
53 #include <scsi/scsi_tcq.h>
54 #include <scsi/scsicam.h>
55 
56 #include "megaraid.h"
57 
58 #define MEGARAID_MODULE_VERSION "2.00.4"
59 
60 MODULE_AUTHOR ("sju@lsil.com");
61 MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
62 MODULE_LICENSE ("GPL");
63 MODULE_VERSION(MEGARAID_MODULE_VERSION);
64 
65 static DEFINE_MUTEX(megadev_mutex);
66 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
67 module_param(max_cmd_per_lun, uint, 0);
68 MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
69 
70 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
71 module_param(max_sectors_per_io, ushort, 0);
72 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
73 
74 
75 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
76 module_param(max_mbox_busy_wait, ushort, 0);
77 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
78 
79 #define RDINDOOR(adapter)	readl((adapter)->mmio_base + 0x20)
80 #define RDOUTDOOR(adapter)	readl((adapter)->mmio_base + 0x2C)
81 #define WRINDOOR(adapter,value)	 writel(value, (adapter)->mmio_base + 0x20)
82 #define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
83 
84 /*
85  * Global variables
86  */
87 
88 static int hba_count;
89 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
90 static struct proc_dir_entry *mega_proc_dir_entry;
91 
92 /* For controller re-ordering */
93 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
94 
95 static long
96 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
97 
98 /*
99  * The File Operations structure for the serial/ioctl interface of the driver
100  */
101 static const struct file_operations megadev_fops = {
102 	.owner		= THIS_MODULE,
103 	.unlocked_ioctl	= megadev_unlocked_ioctl,
104 	.open		= megadev_open,
105 	.llseek		= noop_llseek,
106 };
107 
108 /*
109  * Array to structures for storing the information about the controllers. This
110  * information is sent to the user level applications, when they do an ioctl
111  * for this information.
112  */
113 static struct mcontroller mcontroller[MAX_CONTROLLERS];
114 
115 /* The current driver version */
116 static u32 driver_ver = 0x02000000;
117 
118 /* major number used by the device for character interface */
119 static int major;
120 
121 #define IS_RAID_CH(hba, ch)	(((hba)->mega_ch_class >> (ch)) & 0x01)
122 
123 
124 /*
125  * Debug variable to print some diagnostic messages
126  */
127 static int trace_level;
128 
129 /**
130  * mega_setup_mailbox()
131  * @adapter: pointer to our soft state
132  *
133  * Allocates a 8 byte aligned memory for the handshake mailbox.
134  */
135 static int
mega_setup_mailbox(adapter_t * adapter)136 mega_setup_mailbox(adapter_t *adapter)
137 {
138 	unsigned long	align;
139 
140 	adapter->una_mbox64 = dma_alloc_coherent(&adapter->dev->dev,
141 						 sizeof(mbox64_t),
142 						 &adapter->una_mbox64_dma,
143 						 GFP_KERNEL);
144 
145 	if( !adapter->una_mbox64 ) return -1;
146 
147 	adapter->mbox = &adapter->una_mbox64->mbox;
148 
149 	adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
150 			(~0UL ^ 0xFUL));
151 
152 	adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
153 
154 	align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
155 
156 	adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
157 
158 	/*
159 	 * Register the mailbox if the controller is an io-mapped controller
160 	 */
161 	if( adapter->flag & BOARD_IOMAP ) {
162 
163 		outb(adapter->mbox_dma & 0xFF,
164 				adapter->host->io_port + MBOX_PORT0);
165 
166 		outb((adapter->mbox_dma >> 8) & 0xFF,
167 				adapter->host->io_port + MBOX_PORT1);
168 
169 		outb((adapter->mbox_dma >> 16) & 0xFF,
170 				adapter->host->io_port + MBOX_PORT2);
171 
172 		outb((adapter->mbox_dma >> 24) & 0xFF,
173 				adapter->host->io_port + MBOX_PORT3);
174 
175 		outb(ENABLE_MBOX_BYTE,
176 				adapter->host->io_port + ENABLE_MBOX_REGION);
177 
178 		irq_ack(adapter);
179 
180 		irq_enable(adapter);
181 	}
182 
183 	return 0;
184 }
185 
186 
187 /*
188  * mega_query_adapter()
189  * @adapter - pointer to our soft state
190  *
191  * Issue the adapter inquiry commands to the controller and find out
192  * information and parameter about the devices attached
193  */
194 static int
mega_query_adapter(adapter_t * adapter)195 mega_query_adapter(adapter_t *adapter)
196 {
197 	dma_addr_t	prod_info_dma_handle;
198 	mega_inquiry3	*inquiry3;
199 	struct mbox_out	mbox;
200 	u8	*raw_mbox = (u8 *)&mbox;
201 	int	retval;
202 
203 	/* Initialize adapter inquiry mailbox */
204 
205 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
206 	memset(&mbox, 0, sizeof(mbox));
207 
208 	/*
209 	 * Try to issue Inquiry3 command
210 	 * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
211 	 * update enquiry3 structure
212 	 */
213 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
214 
215 	inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
216 
217 	raw_mbox[0] = FC_NEW_CONFIG;		/* i.e. mbox->cmd=0xA1 */
218 	raw_mbox[2] = NC_SUBOP_ENQUIRY3;	/* i.e. 0x0F */
219 	raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;	/* i.e. 0x02 */
220 
221 	/* Issue a blocking command to the card */
222 	if (issue_scb_block(adapter, raw_mbox)) {
223 		/* the adapter does not support 40ld */
224 
225 		mraid_ext_inquiry	*ext_inq;
226 		mraid_inquiry		*inq;
227 		dma_addr_t		dma_handle;
228 
229 		ext_inq = dma_alloc_coherent(&adapter->dev->dev,
230 					     sizeof(mraid_ext_inquiry),
231 					     &dma_handle, GFP_KERNEL);
232 
233 		if( ext_inq == NULL ) return -1;
234 
235 		inq = &ext_inq->raid_inq;
236 
237 		mbox.xferaddr = (u32)dma_handle;
238 
239 		/*issue old 0x04 command to adapter */
240 		mbox.cmd = MEGA_MBOXCMD_ADPEXTINQ;
241 
242 		issue_scb_block(adapter, raw_mbox);
243 
244 		/*
245 		 * update Enquiry3 and ProductInfo structures with
246 		 * mraid_inquiry structure
247 		 */
248 		mega_8_to_40ld(inq, inquiry3,
249 				(mega_product_info *)&adapter->product_info);
250 
251 		dma_free_coherent(&adapter->dev->dev,
252 				  sizeof(mraid_ext_inquiry), ext_inq,
253 				  dma_handle);
254 
255 	} else {		/*adapter supports 40ld */
256 		adapter->flag |= BOARD_40LD;
257 
258 		/*
259 		 * get product_info, which is static information and will be
260 		 * unchanged
261 		 */
262 		prod_info_dma_handle = dma_map_single(&adapter->dev->dev,
263 						      (void *)&adapter->product_info,
264 						      sizeof(mega_product_info),
265 						      DMA_FROM_DEVICE);
266 
267 		mbox.xferaddr = prod_info_dma_handle;
268 
269 		raw_mbox[0] = FC_NEW_CONFIG;	/* i.e. mbox->cmd=0xA1 */
270 		raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;	/* i.e. 0x0E */
271 
272 		if ((retval = issue_scb_block(adapter, raw_mbox)))
273 			dev_warn(&adapter->dev->dev,
274 				"Product_info cmd failed with error: %d\n",
275 				retval);
276 
277 		dma_unmap_single(&adapter->dev->dev, prod_info_dma_handle,
278 				 sizeof(mega_product_info), DMA_FROM_DEVICE);
279 	}
280 
281 
282 	/*
283 	 * kernel scans the channels from 0 to <= max_channel
284 	 */
285 	adapter->host->max_channel =
286 		adapter->product_info.nchannels + NVIRT_CHAN -1;
287 
288 	adapter->host->max_id = 16;	/* max targets per channel */
289 
290 	adapter->host->max_lun = 7;	/* Up to 7 luns for non disk devices */
291 
292 	adapter->host->cmd_per_lun = max_cmd_per_lun;
293 
294 	adapter->numldrv = inquiry3->num_ldrv;
295 
296 	adapter->max_cmds = adapter->product_info.max_commands;
297 
298 	if(adapter->max_cmds > MAX_COMMANDS)
299 		adapter->max_cmds = MAX_COMMANDS;
300 
301 	adapter->host->can_queue = adapter->max_cmds - 1;
302 
303 	/*
304 	 * Get the maximum number of scatter-gather elements supported by this
305 	 * firmware
306 	 */
307 	mega_get_max_sgl(adapter);
308 
309 	adapter->host->sg_tablesize = adapter->sglen;
310 
311 	/* use HP firmware and bios version encoding
312 	   Note: fw_version[0|1] and bios_version[0|1] were originally shifted
313 	   right 8 bits making them zero. This 0 value was hardcoded to fix
314 	   sparse warnings. */
315 	if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
316 		snprintf(adapter->fw_version, sizeof(adapter->fw_version),
317 			 "%c%d%d.%d%d",
318 			 adapter->product_info.fw_version[2],
319 			 0,
320 			 adapter->product_info.fw_version[1] & 0x0f,
321 			 0,
322 			 adapter->product_info.fw_version[0] & 0x0f);
323 		snprintf(adapter->bios_version, sizeof(adapter->fw_version),
324 			 "%c%d%d.%d%d",
325 			 adapter->product_info.bios_version[2],
326 			 0,
327 			 adapter->product_info.bios_version[1] & 0x0f,
328 			 0,
329 			 adapter->product_info.bios_version[0] & 0x0f);
330 	} else {
331 		memcpy(adapter->fw_version,
332 				(char *)adapter->product_info.fw_version, 4);
333 		adapter->fw_version[4] = 0;
334 
335 		memcpy(adapter->bios_version,
336 				(char *)adapter->product_info.bios_version, 4);
337 
338 		adapter->bios_version[4] = 0;
339 	}
340 
341 	dev_notice(&adapter->dev->dev, "[%s:%s] detected %d logical drives\n",
342 		adapter->fw_version, adapter->bios_version, adapter->numldrv);
343 
344 	/*
345 	 * Do we support extended (>10 bytes) cdbs
346 	 */
347 	adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
348 	if (adapter->support_ext_cdb)
349 		dev_notice(&adapter->dev->dev, "supports extended CDBs\n");
350 
351 
352 	return 0;
353 }
354 
355 /**
356  * mega_runpendq()
357  * @adapter: pointer to our soft state
358  *
359  * Runs through the list of pending requests.
360  */
361 static inline void
mega_runpendq(adapter_t * adapter)362 mega_runpendq(adapter_t *adapter)
363 {
364 	if(!list_empty(&adapter->pending_list))
365 		__mega_runpendq(adapter);
366 }
367 
368 /*
369  * megaraid_queue()
370  * @scmd - Issue this scsi command
371  * @done - the callback hook into the scsi mid-layer
372  *
373  * The command queuing entry point for the mid-layer.
374  */
megaraid_queue_lck(struct scsi_cmnd * scmd)375 static int megaraid_queue_lck(struct scsi_cmnd *scmd)
376 {
377 	adapter_t	*adapter;
378 	scb_t	*scb;
379 	int	busy=0;
380 	unsigned long flags;
381 
382 	adapter = (adapter_t *)scmd->device->host->hostdata;
383 
384 	/*
385 	 * Allocate and build a SCB request
386 	 * busy flag will be set if mega_build_cmd() command could not
387 	 * allocate scb. We will return non-zero status in that case.
388 	 * NOTE: scb can be null even though certain commands completed
389 	 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
390 	 * return 0 in that case.
391 	 */
392 
393 	spin_lock_irqsave(&adapter->lock, flags);
394 	scb = mega_build_cmd(adapter, scmd, &busy);
395 	if (!scb)
396 		goto out;
397 
398 	scb->state |= SCB_PENDQ;
399 	list_add_tail(&scb->list, &adapter->pending_list);
400 
401 	/*
402 	 * Check if the HBA is in quiescent state, e.g., during a
403 	 * delete logical drive opertion. If it is, don't run
404 	 * the pending_list.
405 	 */
406 	if (atomic_read(&adapter->quiescent) == 0)
407 		mega_runpendq(adapter);
408 
409 	busy = 0;
410  out:
411 	spin_unlock_irqrestore(&adapter->lock, flags);
412 	return busy;
413 }
414 
DEF_SCSI_QCMD(megaraid_queue)415 static DEF_SCSI_QCMD(megaraid_queue)
416 
417 /**
418  * mega_allocate_scb()
419  * @adapter: pointer to our soft state
420  * @cmd: scsi command from the mid-layer
421  *
422  * Allocate a SCB structure. This is the central structure for controller
423  * commands.
424  */
425 static inline scb_t *
426 mega_allocate_scb(adapter_t *adapter, struct scsi_cmnd *cmd)
427 {
428 	struct list_head *head = &adapter->free_list;
429 	scb_t	*scb;
430 
431 	/* Unlink command from Free List */
432 	if( !list_empty(head) ) {
433 
434 		scb = list_entry(head->next, scb_t, list);
435 
436 		list_del_init(head->next);
437 
438 		scb->state = SCB_ACTIVE;
439 		scb->cmd = cmd;
440 		scb->dma_type = MEGA_DMA_TYPE_NONE;
441 
442 		return scb;
443 	}
444 
445 	return NULL;
446 }
447 
448 /**
449  * mega_get_ldrv_num()
450  * @adapter: pointer to our soft state
451  * @cmd: scsi mid layer command
452  * @channel: channel on the controller
453  *
454  * Calculate the logical drive number based on the information in scsi command
455  * and the channel number.
456  */
457 static inline int
mega_get_ldrv_num(adapter_t * adapter,struct scsi_cmnd * cmd,int channel)458 mega_get_ldrv_num(adapter_t *adapter, struct scsi_cmnd *cmd, int channel)
459 {
460 	int		tgt;
461 	int		ldrv_num;
462 
463 	tgt = cmd->device->id;
464 
465 	if ( tgt > adapter->this_id )
466 		tgt--;	/* we do not get inquires for initiator id */
467 
468 	ldrv_num = (channel * 15) + tgt;
469 
470 
471 	/*
472 	 * If we have a logical drive with boot enabled, project it first
473 	 */
474 	if( adapter->boot_ldrv_enabled ) {
475 		if( ldrv_num == 0 ) {
476 			ldrv_num = adapter->boot_ldrv;
477 		}
478 		else {
479 			if( ldrv_num <= adapter->boot_ldrv ) {
480 				ldrv_num--;
481 			}
482 		}
483 	}
484 
485 	/*
486 	 * If "delete logical drive" feature is enabled on this controller.
487 	 * Do only if at least one delete logical drive operation was done.
488 	 *
489 	 * Also, after logical drive deletion, instead of logical drive number,
490 	 * the value returned should be 0x80+logical drive id.
491 	 *
492 	 * These is valid only for IO commands.
493 	 */
494 
495 	if (adapter->support_random_del && adapter->read_ldidmap )
496 		switch (cmd->cmnd[0]) {
497 		case READ_6:
498 		case WRITE_6:
499 		case READ_10:
500 		case WRITE_10:
501 			ldrv_num += 0x80;
502 		}
503 
504 	return ldrv_num;
505 }
506 
507 /**
508  * mega_build_cmd()
509  * @adapter: pointer to our soft state
510  * @cmd: Prepare using this scsi command
511  * @busy: busy flag if no resources
512  *
513  * Prepares a command and scatter gather list for the controller. This routine
514  * also finds out if the commands is intended for a logical drive or a
515  * physical device and prepares the controller command accordingly.
516  *
517  * We also re-order the logical drives and physical devices based on their
518  * boot settings.
519  */
520 static scb_t *
mega_build_cmd(adapter_t * adapter,struct scsi_cmnd * cmd,int * busy)521 mega_build_cmd(adapter_t *adapter, struct scsi_cmnd *cmd, int *busy)
522 {
523 	mega_passthru	*pthru;
524 	scb_t	*scb;
525 	mbox_t	*mbox;
526 	u32	seg;
527 	char	islogical;
528 	int	max_ldrv_num;
529 	int	channel = 0;
530 	int	target = 0;
531 	int	ldrv_num = 0;   /* logical drive number */
532 
533 	/*
534 	 * We know what channels our logical drives are on - mega_find_card()
535 	 */
536 	islogical = adapter->logdrv_chan[cmd->device->channel];
537 
538 	/*
539 	 * The theory: If physical drive is chosen for boot, all the physical
540 	 * devices are exported before the logical drives, otherwise physical
541 	 * devices are pushed after logical drives, in which case - Kernel sees
542 	 * the physical devices on virtual channel which is obviously converted
543 	 * to actual channel on the HBA.
544 	 */
545 	if( adapter->boot_pdrv_enabled ) {
546 		if( islogical ) {
547 			/* logical channel */
548 			channel = cmd->device->channel -
549 				adapter->product_info.nchannels;
550 		}
551 		else {
552 			/* this is physical channel */
553 			channel = cmd->device->channel;
554 			target = cmd->device->id;
555 
556 			/*
557 			 * boot from a physical disk, that disk needs to be
558 			 * exposed first IF both the channels are SCSI, then
559 			 * booting from the second channel is not allowed.
560 			 */
561 			if( target == 0 ) {
562 				target = adapter->boot_pdrv_tgt;
563 			}
564 			else if( target == adapter->boot_pdrv_tgt ) {
565 				target = 0;
566 			}
567 		}
568 	}
569 	else {
570 		if( islogical ) {
571 			/* this is the logical channel */
572 			channel = cmd->device->channel;
573 		}
574 		else {
575 			/* physical channel */
576 			channel = cmd->device->channel - NVIRT_CHAN;
577 			target = cmd->device->id;
578 		}
579 	}
580 
581 
582 	if(islogical) {
583 
584 		/* have just LUN 0 for each target on virtual channels */
585 		if (cmd->device->lun) {
586 			cmd->result = (DID_BAD_TARGET << 16);
587 			scsi_done(cmd);
588 			return NULL;
589 		}
590 
591 		ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
592 
593 
594 		max_ldrv_num = (adapter->flag & BOARD_40LD) ?
595 			MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
596 
597 		/*
598 		 * max_ldrv_num increases by 0x80 if some logical drive was
599 		 * deleted.
600 		 */
601 		if(adapter->read_ldidmap)
602 			max_ldrv_num += 0x80;
603 
604 		if(ldrv_num > max_ldrv_num ) {
605 			cmd->result = (DID_BAD_TARGET << 16);
606 			scsi_done(cmd);
607 			return NULL;
608 		}
609 
610 	}
611 	else {
612 		if( cmd->device->lun > 7) {
613 			/*
614 			 * Do not support lun >7 for physically accessed
615 			 * devices
616 			 */
617 			cmd->result = (DID_BAD_TARGET << 16);
618 			scsi_done(cmd);
619 			return NULL;
620 		}
621 	}
622 
623 	/*
624 	 *
625 	 * Logical drive commands
626 	 *
627 	 */
628 	if(islogical) {
629 		switch (cmd->cmnd[0]) {
630 		case TEST_UNIT_READY:
631 #if MEGA_HAVE_CLUSTERING
632 			/*
633 			 * Do we support clustering and is the support enabled
634 			 * If no, return success always
635 			 */
636 			if( !adapter->has_cluster ) {
637 				cmd->result = (DID_OK << 16);
638 				scsi_done(cmd);
639 				return NULL;
640 			}
641 
642 			if(!(scb = mega_allocate_scb(adapter, cmd))) {
643 				*busy = 1;
644 				return NULL;
645 			}
646 
647 			scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
648 			scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
649 			scb->raw_mbox[3] = ldrv_num;
650 
651 			scb->dma_direction = DMA_NONE;
652 
653 			return scb;
654 #else
655 			cmd->result = (DID_OK << 16);
656 			scsi_done(cmd);
657 			return NULL;
658 #endif
659 
660 		case MODE_SENSE: {
661 			char *buf;
662 			struct scatterlist *sg;
663 
664 			sg = scsi_sglist(cmd);
665 			buf = kmap_atomic(sg_page(sg)) + sg->offset;
666 
667 			memset(buf, 0, cmd->cmnd[4]);
668 			kunmap_atomic(buf - sg->offset);
669 
670 			cmd->result = (DID_OK << 16);
671 			scsi_done(cmd);
672 			return NULL;
673 		}
674 
675 		case READ_CAPACITY:
676 		case INQUIRY:
677 
678 			if(!(adapter->flag & (1L << cmd->device->channel))) {
679 
680 				dev_notice(&adapter->dev->dev,
681 					"scsi%d: scanning scsi channel %d "
682 					"for logical drives\n",
683 						adapter->host->host_no,
684 						cmd->device->channel);
685 
686 				adapter->flag |= (1L << cmd->device->channel);
687 			}
688 
689 			/* Allocate a SCB and initialize passthru */
690 			if(!(scb = mega_allocate_scb(adapter, cmd))) {
691 				*busy = 1;
692 				return NULL;
693 			}
694 			pthru = scb->pthru;
695 
696 			mbox = (mbox_t *)scb->raw_mbox;
697 			memset(mbox, 0, sizeof(scb->raw_mbox));
698 			memset(pthru, 0, sizeof(mega_passthru));
699 
700 			pthru->timeout = 0;
701 			pthru->ars = 1;
702 			pthru->reqsenselen = 14;
703 			pthru->islogical = 1;
704 			pthru->logdrv = ldrv_num;
705 			pthru->cdblen = cmd->cmd_len;
706 			memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
707 
708 			if( adapter->has_64bit_addr ) {
709 				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
710 			}
711 			else {
712 				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
713 			}
714 
715 			scb->dma_direction = DMA_FROM_DEVICE;
716 
717 			pthru->numsgelements = mega_build_sglist(adapter, scb,
718 				&pthru->dataxferaddr, &pthru->dataxferlen);
719 
720 			mbox->m_out.xferaddr = scb->pthru_dma_addr;
721 
722 			return scb;
723 
724 		case READ_6:
725 		case WRITE_6:
726 		case READ_10:
727 		case WRITE_10:
728 		case READ_12:
729 		case WRITE_12:
730 
731 			/* Allocate a SCB and initialize mailbox */
732 			if(!(scb = mega_allocate_scb(adapter, cmd))) {
733 				*busy = 1;
734 				return NULL;
735 			}
736 			mbox = (mbox_t *)scb->raw_mbox;
737 
738 			memset(mbox, 0, sizeof(scb->raw_mbox));
739 			mbox->m_out.logdrv = ldrv_num;
740 
741 			/*
742 			 * A little hack: 2nd bit is zero for all scsi read
743 			 * commands and is set for all scsi write commands
744 			 */
745 			if( adapter->has_64bit_addr ) {
746 				mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
747 					MEGA_MBOXCMD_LWRITE64:
748 					MEGA_MBOXCMD_LREAD64 ;
749 			}
750 			else {
751 				mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
752 					MEGA_MBOXCMD_LWRITE:
753 					MEGA_MBOXCMD_LREAD ;
754 			}
755 
756 			/*
757 			 * 6-byte READ(0x08) or WRITE(0x0A) cdb
758 			 */
759 			if( cmd->cmd_len == 6 ) {
760 				mbox->m_out.numsectors = (u32) cmd->cmnd[4];
761 				mbox->m_out.lba =
762 					((u32)cmd->cmnd[1] << 16) |
763 					((u32)cmd->cmnd[2] << 8) |
764 					(u32)cmd->cmnd[3];
765 
766 				mbox->m_out.lba &= 0x1FFFFF;
767 
768 #if MEGA_HAVE_STATS
769 				/*
770 				 * Take modulo 0x80, since the logical drive
771 				 * number increases by 0x80 when a logical
772 				 * drive was deleted
773 				 */
774 				if (*cmd->cmnd == READ_6) {
775 					adapter->nreads[ldrv_num%0x80]++;
776 					adapter->nreadblocks[ldrv_num%0x80] +=
777 						mbox->m_out.numsectors;
778 				} else {
779 					adapter->nwrites[ldrv_num%0x80]++;
780 					adapter->nwriteblocks[ldrv_num%0x80] +=
781 						mbox->m_out.numsectors;
782 				}
783 #endif
784 			}
785 
786 			/*
787 			 * 10-byte READ(0x28) or WRITE(0x2A) cdb
788 			 */
789 			if( cmd->cmd_len == 10 ) {
790 				mbox->m_out.numsectors =
791 					(u32)cmd->cmnd[8] |
792 					((u32)cmd->cmnd[7] << 8);
793 				mbox->m_out.lba =
794 					((u32)cmd->cmnd[2] << 24) |
795 					((u32)cmd->cmnd[3] << 16) |
796 					((u32)cmd->cmnd[4] << 8) |
797 					(u32)cmd->cmnd[5];
798 
799 #if MEGA_HAVE_STATS
800 				if (*cmd->cmnd == READ_10) {
801 					adapter->nreads[ldrv_num%0x80]++;
802 					adapter->nreadblocks[ldrv_num%0x80] +=
803 						mbox->m_out.numsectors;
804 				} else {
805 					adapter->nwrites[ldrv_num%0x80]++;
806 					adapter->nwriteblocks[ldrv_num%0x80] +=
807 						mbox->m_out.numsectors;
808 				}
809 #endif
810 			}
811 
812 			/*
813 			 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
814 			 */
815 			if( cmd->cmd_len == 12 ) {
816 				mbox->m_out.lba =
817 					((u32)cmd->cmnd[2] << 24) |
818 					((u32)cmd->cmnd[3] << 16) |
819 					((u32)cmd->cmnd[4] << 8) |
820 					(u32)cmd->cmnd[5];
821 
822 				mbox->m_out.numsectors =
823 					((u32)cmd->cmnd[6] << 24) |
824 					((u32)cmd->cmnd[7] << 16) |
825 					((u32)cmd->cmnd[8] << 8) |
826 					(u32)cmd->cmnd[9];
827 
828 #if MEGA_HAVE_STATS
829 				if (*cmd->cmnd == READ_12) {
830 					adapter->nreads[ldrv_num%0x80]++;
831 					adapter->nreadblocks[ldrv_num%0x80] +=
832 						mbox->m_out.numsectors;
833 				} else {
834 					adapter->nwrites[ldrv_num%0x80]++;
835 					adapter->nwriteblocks[ldrv_num%0x80] +=
836 						mbox->m_out.numsectors;
837 				}
838 #endif
839 			}
840 
841 			/*
842 			 * If it is a read command
843 			 */
844 			if( (*cmd->cmnd & 0x0F) == 0x08 ) {
845 				scb->dma_direction = DMA_FROM_DEVICE;
846 			}
847 			else {
848 				scb->dma_direction = DMA_TO_DEVICE;
849 			}
850 
851 			/* Calculate Scatter-Gather info */
852 			mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
853 					(u32 *)&mbox->m_out.xferaddr, &seg);
854 
855 			return scb;
856 
857 #if MEGA_HAVE_CLUSTERING
858 		case RESERVE:
859 		case RELEASE:
860 
861 			/*
862 			 * Do we support clustering and is the support enabled
863 			 */
864 			if( ! adapter->has_cluster ) {
865 
866 				cmd->result = (DID_BAD_TARGET << 16);
867 				scsi_done(cmd);
868 				return NULL;
869 			}
870 
871 			/* Allocate a SCB and initialize mailbox */
872 			if(!(scb = mega_allocate_scb(adapter, cmd))) {
873 				*busy = 1;
874 				return NULL;
875 			}
876 
877 			scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
878 			scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
879 				MEGA_RESERVE_LD : MEGA_RELEASE_LD;
880 
881 			scb->raw_mbox[3] = ldrv_num;
882 
883 			scb->dma_direction = DMA_NONE;
884 
885 			return scb;
886 #endif
887 
888 		default:
889 			cmd->result = (DID_BAD_TARGET << 16);
890 			scsi_done(cmd);
891 			return NULL;
892 		}
893 	}
894 
895 	/*
896 	 * Passthru drive commands
897 	 */
898 	else {
899 		/* Allocate a SCB and initialize passthru */
900 		if(!(scb = mega_allocate_scb(adapter, cmd))) {
901 			*busy = 1;
902 			return NULL;
903 		}
904 
905 		mbox = (mbox_t *)scb->raw_mbox;
906 		memset(mbox, 0, sizeof(scb->raw_mbox));
907 
908 		if( adapter->support_ext_cdb ) {
909 
910 			mega_prepare_extpassthru(adapter, scb, cmd,
911 					channel, target);
912 
913 			mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
914 
915 			mbox->m_out.xferaddr = scb->epthru_dma_addr;
916 
917 		}
918 		else {
919 
920 			pthru = mega_prepare_passthru(adapter, scb, cmd,
921 					channel, target);
922 
923 			/* Initialize mailbox */
924 			if( adapter->has_64bit_addr ) {
925 				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
926 			}
927 			else {
928 				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
929 			}
930 
931 			mbox->m_out.xferaddr = scb->pthru_dma_addr;
932 
933 		}
934 		return scb;
935 	}
936 	return NULL;
937 }
938 
939 
940 /**
941  * mega_prepare_passthru()
942  * @adapter: pointer to our soft state
943  * @scb: our scsi control block
944  * @cmd: scsi command from the mid-layer
945  * @channel: actual channel on the controller
946  * @target: actual id on the controller.
947  *
948  * prepare a command for the scsi physical devices.
949  */
950 static mega_passthru *
mega_prepare_passthru(adapter_t * adapter,scb_t * scb,struct scsi_cmnd * cmd,int channel,int target)951 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *cmd,
952 		      int channel, int target)
953 {
954 	mega_passthru *pthru;
955 
956 	pthru = scb->pthru;
957 	memset(pthru, 0, sizeof (mega_passthru));
958 
959 	/* 0=6sec/1=60sec/2=10min/3=3hrs */
960 	pthru->timeout = 2;
961 
962 	pthru->ars = 1;
963 	pthru->reqsenselen = 14;
964 	pthru->islogical = 0;
965 
966 	pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
967 
968 	pthru->target = (adapter->flag & BOARD_40LD) ?
969 		(channel << 4) | target : target;
970 
971 	pthru->cdblen = cmd->cmd_len;
972 	pthru->logdrv = cmd->device->lun;
973 
974 	memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
975 
976 	/* Not sure about the direction */
977 	scb->dma_direction = DMA_BIDIRECTIONAL;
978 
979 	/* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
980 	switch (cmd->cmnd[0]) {
981 	case INQUIRY:
982 	case READ_CAPACITY:
983 		if(!(adapter->flag & (1L << cmd->device->channel))) {
984 
985 			dev_notice(&adapter->dev->dev,
986 				"scsi%d: scanning scsi channel %d [P%d] "
987 				"for physical devices\n",
988 					adapter->host->host_no,
989 					cmd->device->channel, channel);
990 
991 			adapter->flag |= (1L << cmd->device->channel);
992 		}
993 		fallthrough;
994 	default:
995 		pthru->numsgelements = mega_build_sglist(adapter, scb,
996 				&pthru->dataxferaddr, &pthru->dataxferlen);
997 		break;
998 	}
999 	return pthru;
1000 }
1001 
1002 
1003 /**
1004  * mega_prepare_extpassthru()
1005  * @adapter: pointer to our soft state
1006  * @scb: our scsi control block
1007  * @cmd: scsi command from the mid-layer
1008  * @channel: actual channel on the controller
1009  * @target: actual id on the controller.
1010  *
1011  * prepare a command for the scsi physical devices. This rountine prepares
1012  * commands for devices which can take extended CDBs (>10 bytes)
1013  */
1014 static mega_ext_passthru *
mega_prepare_extpassthru(adapter_t * adapter,scb_t * scb,struct scsi_cmnd * cmd,int channel,int target)1015 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb,
1016 			 struct scsi_cmnd *cmd,
1017 			 int channel, int target)
1018 {
1019 	mega_ext_passthru	*epthru;
1020 
1021 	epthru = scb->epthru;
1022 	memset(epthru, 0, sizeof(mega_ext_passthru));
1023 
1024 	/* 0=6sec/1=60sec/2=10min/3=3hrs */
1025 	epthru->timeout = 2;
1026 
1027 	epthru->ars = 1;
1028 	epthru->reqsenselen = 14;
1029 	epthru->islogical = 0;
1030 
1031 	epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1032 	epthru->target = (adapter->flag & BOARD_40LD) ?
1033 		(channel << 4) | target : target;
1034 
1035 	epthru->cdblen = cmd->cmd_len;
1036 	epthru->logdrv = cmd->device->lun;
1037 
1038 	memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1039 
1040 	/* Not sure about the direction */
1041 	scb->dma_direction = DMA_BIDIRECTIONAL;
1042 
1043 	switch(cmd->cmnd[0]) {
1044 	case INQUIRY:
1045 	case READ_CAPACITY:
1046 		if(!(adapter->flag & (1L << cmd->device->channel))) {
1047 
1048 			dev_notice(&adapter->dev->dev,
1049 				"scsi%d: scanning scsi channel %d [P%d] "
1050 				"for physical devices\n",
1051 					adapter->host->host_no,
1052 					cmd->device->channel, channel);
1053 
1054 			adapter->flag |= (1L << cmd->device->channel);
1055 		}
1056 		fallthrough;
1057 	default:
1058 		epthru->numsgelements = mega_build_sglist(adapter, scb,
1059 				&epthru->dataxferaddr, &epthru->dataxferlen);
1060 		break;
1061 	}
1062 
1063 	return epthru;
1064 }
1065 
1066 static void
__mega_runpendq(adapter_t * adapter)1067 __mega_runpendq(adapter_t *adapter)
1068 {
1069 	scb_t *scb;
1070 	struct list_head *pos, *next;
1071 
1072 	/* Issue any pending commands to the card */
1073 	list_for_each_safe(pos, next, &adapter->pending_list) {
1074 
1075 		scb = list_entry(pos, scb_t, list);
1076 
1077 		if( !(scb->state & SCB_ISSUED) ) {
1078 
1079 			if( issue_scb(adapter, scb) != 0 )
1080 				return;
1081 		}
1082 	}
1083 
1084 	return;
1085 }
1086 
1087 
1088 /**
1089  * issue_scb()
1090  * @adapter: pointer to our soft state
1091  * @scb: scsi control block
1092  *
1093  * Post a command to the card if the mailbox is available, otherwise return
1094  * busy. We also take the scb from the pending list if the mailbox is
1095  * available.
1096  */
1097 static int
issue_scb(adapter_t * adapter,scb_t * scb)1098 issue_scb(adapter_t *adapter, scb_t *scb)
1099 {
1100 	volatile mbox64_t	*mbox64 = adapter->mbox64;
1101 	volatile mbox_t		*mbox = adapter->mbox;
1102 	unsigned int	i = 0;
1103 
1104 	if(unlikely(mbox->m_in.busy)) {
1105 		do {
1106 			udelay(1);
1107 			i++;
1108 		} while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1109 
1110 		if(mbox->m_in.busy) return -1;
1111 	}
1112 
1113 	/* Copy mailbox data into host structure */
1114 	memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1115 			sizeof(struct mbox_out));
1116 
1117 	mbox->m_out.cmdid = scb->idx;	/* Set cmdid */
1118 	mbox->m_in.busy = 1;		/* Set busy */
1119 
1120 
1121 	/*
1122 	 * Increment the pending queue counter
1123 	 */
1124 	atomic_inc(&adapter->pend_cmds);
1125 
1126 	switch (mbox->m_out.cmd) {
1127 	case MEGA_MBOXCMD_LREAD64:
1128 	case MEGA_MBOXCMD_LWRITE64:
1129 	case MEGA_MBOXCMD_PASSTHRU64:
1130 	case MEGA_MBOXCMD_EXTPTHRU:
1131 		mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1132 		mbox64->xfer_segment_hi = 0;
1133 		mbox->m_out.xferaddr = 0xFFFFFFFF;
1134 		break;
1135 	default:
1136 		mbox64->xfer_segment_lo = 0;
1137 		mbox64->xfer_segment_hi = 0;
1138 	}
1139 
1140 	/*
1141 	 * post the command
1142 	 */
1143 	scb->state |= SCB_ISSUED;
1144 
1145 	if( likely(adapter->flag & BOARD_MEMMAP) ) {
1146 		mbox->m_in.poll = 0;
1147 		mbox->m_in.ack = 0;
1148 		WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1149 	}
1150 	else {
1151 		irq_enable(adapter);
1152 		issue_command(adapter);
1153 	}
1154 
1155 	return 0;
1156 }
1157 
1158 /*
1159  * Wait until the controller's mailbox is available
1160  */
1161 static inline int
mega_busywait_mbox(adapter_t * adapter)1162 mega_busywait_mbox (adapter_t *adapter)
1163 {
1164 	if (adapter->mbox->m_in.busy)
1165 		return __mega_busywait_mbox(adapter);
1166 	return 0;
1167 }
1168 
1169 /**
1170  * issue_scb_block()
1171  * @adapter: pointer to our soft state
1172  * @raw_mbox: the mailbox
1173  *
1174  * Issue a scb in synchronous and non-interrupt mode
1175  */
1176 static int
issue_scb_block(adapter_t * adapter,u_char * raw_mbox)1177 issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1178 {
1179 	volatile mbox64_t *mbox64 = adapter->mbox64;
1180 	volatile mbox_t *mbox = adapter->mbox;
1181 	u8	byte;
1182 
1183 	/* Wait until mailbox is free */
1184 	if(mega_busywait_mbox (adapter))
1185 		goto bug_blocked_mailbox;
1186 
1187 	/* Copy mailbox data into host structure */
1188 	memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1189 	mbox->m_out.cmdid = 0xFE;
1190 	mbox->m_in.busy = 1;
1191 
1192 	switch (raw_mbox[0]) {
1193 	case MEGA_MBOXCMD_LREAD64:
1194 	case MEGA_MBOXCMD_LWRITE64:
1195 	case MEGA_MBOXCMD_PASSTHRU64:
1196 	case MEGA_MBOXCMD_EXTPTHRU:
1197 		mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1198 		mbox64->xfer_segment_hi = 0;
1199 		mbox->m_out.xferaddr = 0xFFFFFFFF;
1200 		break;
1201 	default:
1202 		mbox64->xfer_segment_lo = 0;
1203 		mbox64->xfer_segment_hi = 0;
1204 	}
1205 
1206 	if( likely(adapter->flag & BOARD_MEMMAP) ) {
1207 		mbox->m_in.poll = 0;
1208 		mbox->m_in.ack = 0;
1209 		mbox->m_in.numstatus = 0xFF;
1210 		mbox->m_in.status = 0xFF;
1211 		WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1212 
1213 		while((volatile u8)mbox->m_in.numstatus == 0xFF)
1214 			cpu_relax();
1215 
1216 		mbox->m_in.numstatus = 0xFF;
1217 
1218 		while( (volatile u8)mbox->m_in.poll != 0x77 )
1219 			cpu_relax();
1220 
1221 		mbox->m_in.poll = 0;
1222 		mbox->m_in.ack = 0x77;
1223 
1224 		WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1225 
1226 		while(RDINDOOR(adapter) & 0x2)
1227 			cpu_relax();
1228 	}
1229 	else {
1230 		irq_disable(adapter);
1231 		issue_command(adapter);
1232 
1233 		while (!((byte = irq_state(adapter)) & INTR_VALID))
1234 			cpu_relax();
1235 
1236 		set_irq_state(adapter, byte);
1237 		irq_enable(adapter);
1238 		irq_ack(adapter);
1239 	}
1240 
1241 	return mbox->m_in.status;
1242 
1243 bug_blocked_mailbox:
1244 	dev_warn(&adapter->dev->dev, "Blocked mailbox......!!\n");
1245 	udelay (1000);
1246 	return -1;
1247 }
1248 
1249 
1250 /**
1251  * megaraid_isr_iomapped()
1252  * @irq: irq
1253  * @devp: pointer to our soft state
1254  *
1255  * Interrupt service routine for io-mapped controllers.
1256  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1257  * and service the completed commands.
1258  */
1259 static irqreturn_t
megaraid_isr_iomapped(int irq,void * devp)1260 megaraid_isr_iomapped(int irq, void *devp)
1261 {
1262 	adapter_t	*adapter = devp;
1263 	unsigned long	flags;
1264 	u8	status;
1265 	u8	nstatus;
1266 	u8	completed[MAX_FIRMWARE_STATUS];
1267 	u8	byte;
1268 	int	handled = 0;
1269 
1270 
1271 	/*
1272 	 * loop till F/W has more commands for us to complete.
1273 	 */
1274 	spin_lock_irqsave(&adapter->lock, flags);
1275 
1276 	do {
1277 		/* Check if a valid interrupt is pending */
1278 		byte = irq_state(adapter);
1279 		if( (byte & VALID_INTR_BYTE) == 0 ) {
1280 			/*
1281 			 * No more pending commands
1282 			 */
1283 			goto out_unlock;
1284 		}
1285 		set_irq_state(adapter, byte);
1286 
1287 		while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1288 				== 0xFF)
1289 			cpu_relax();
1290 		adapter->mbox->m_in.numstatus = 0xFF;
1291 
1292 		status = adapter->mbox->m_in.status;
1293 
1294 		/*
1295 		 * decrement the pending queue counter
1296 		 */
1297 		atomic_sub(nstatus, &adapter->pend_cmds);
1298 
1299 		memcpy(completed, (void *)adapter->mbox->m_in.completed,
1300 				nstatus);
1301 
1302 		/* Acknowledge interrupt */
1303 		irq_ack(adapter);
1304 
1305 		mega_cmd_done(adapter, completed, nstatus, status);
1306 
1307 		mega_rundoneq(adapter);
1308 
1309 		handled = 1;
1310 
1311 		/* Loop through any pending requests */
1312 		if(atomic_read(&adapter->quiescent) == 0) {
1313 			mega_runpendq(adapter);
1314 		}
1315 
1316 	} while(1);
1317 
1318  out_unlock:
1319 
1320 	spin_unlock_irqrestore(&adapter->lock, flags);
1321 
1322 	return IRQ_RETVAL(handled);
1323 }
1324 
1325 
1326 /**
1327  * megaraid_isr_memmapped()
1328  * @irq: irq
1329  * @devp: pointer to our soft state
1330  *
1331  * Interrupt service routine for memory-mapped controllers.
1332  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1333  * and service the completed commands.
1334  */
1335 static irqreturn_t
megaraid_isr_memmapped(int irq,void * devp)1336 megaraid_isr_memmapped(int irq, void *devp)
1337 {
1338 	adapter_t	*adapter = devp;
1339 	unsigned long	flags;
1340 	u8	status;
1341 	u32	dword = 0;
1342 	u8	nstatus;
1343 	u8	completed[MAX_FIRMWARE_STATUS];
1344 	int	handled = 0;
1345 
1346 
1347 	/*
1348 	 * loop till F/W has more commands for us to complete.
1349 	 */
1350 	spin_lock_irqsave(&adapter->lock, flags);
1351 
1352 	do {
1353 		/* Check if a valid interrupt is pending */
1354 		dword = RDOUTDOOR(adapter);
1355 		if(dword != 0x10001234) {
1356 			/*
1357 			 * No more pending commands
1358 			 */
1359 			goto out_unlock;
1360 		}
1361 		WROUTDOOR(adapter, 0x10001234);
1362 
1363 		while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1364 				== 0xFF) {
1365 			cpu_relax();
1366 		}
1367 		adapter->mbox->m_in.numstatus = 0xFF;
1368 
1369 		status = adapter->mbox->m_in.status;
1370 
1371 		/*
1372 		 * decrement the pending queue counter
1373 		 */
1374 		atomic_sub(nstatus, &adapter->pend_cmds);
1375 
1376 		memcpy(completed, (void *)adapter->mbox->m_in.completed,
1377 				nstatus);
1378 
1379 		/* Acknowledge interrupt */
1380 		WRINDOOR(adapter, 0x2);
1381 
1382 		handled = 1;
1383 
1384 		while( RDINDOOR(adapter) & 0x02 )
1385 			cpu_relax();
1386 
1387 		mega_cmd_done(adapter, completed, nstatus, status);
1388 
1389 		mega_rundoneq(adapter);
1390 
1391 		/* Loop through any pending requests */
1392 		if(atomic_read(&adapter->quiescent) == 0) {
1393 			mega_runpendq(adapter);
1394 		}
1395 
1396 	} while(1);
1397 
1398  out_unlock:
1399 
1400 	spin_unlock_irqrestore(&adapter->lock, flags);
1401 
1402 	return IRQ_RETVAL(handled);
1403 }
1404 /**
1405  * mega_cmd_done()
1406  * @adapter: pointer to our soft state
1407  * @completed: array of ids of completed commands
1408  * @nstatus: number of completed commands
1409  * @status: status of the last command completed
1410  *
1411  * Complete the commands and call the scsi mid-layer callback hooks.
1412  */
1413 static void
mega_cmd_done(adapter_t * adapter,u8 completed[],int nstatus,int status)1414 mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1415 {
1416 	mega_ext_passthru	*epthru = NULL;
1417 	struct scatterlist	*sgl;
1418 	struct scsi_cmnd	*cmd = NULL;
1419 	mega_passthru	*pthru = NULL;
1420 	mbox_t	*mbox = NULL;
1421 	u8	c;
1422 	scb_t	*scb;
1423 	int	islogical;
1424 	int	cmdid;
1425 	int	i;
1426 
1427 	/*
1428 	 * for all the commands completed, call the mid-layer callback routine
1429 	 * and free the scb.
1430 	 */
1431 	for( i = 0; i < nstatus; i++ ) {
1432 
1433 		cmdid = completed[i];
1434 
1435 		/*
1436 		 * Only free SCBs for the commands coming down from the
1437 		 * mid-layer, not for which were issued internally
1438 		 *
1439 		 * For internal command, restore the status returned by the
1440 		 * firmware so that user can interpret it.
1441 		 */
1442 		if (cmdid == CMDID_INT_CMDS) {
1443 			scb = &adapter->int_scb;
1444 			cmd = scb->cmd;
1445 
1446 			list_del_init(&scb->list);
1447 			scb->state = SCB_FREE;
1448 
1449 			adapter->int_status = status;
1450 			complete(&adapter->int_waitq);
1451 		} else {
1452 			scb = &adapter->scb_list[cmdid];
1453 
1454 			/*
1455 			 * Make sure f/w has completed a valid command
1456 			 */
1457 			if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1458 				dev_crit(&adapter->dev->dev, "invalid command "
1459 					"Id %d, scb->state:%x, scsi cmd:%p\n",
1460 					cmdid, scb->state, scb->cmd);
1461 
1462 				continue;
1463 			}
1464 
1465 			/*
1466 			 * Was a abort issued for this command
1467 			 */
1468 			if( scb->state & SCB_ABORT ) {
1469 
1470 				dev_warn(&adapter->dev->dev,
1471 					"aborted cmd [%x] complete\n",
1472 					scb->idx);
1473 
1474 				scb->cmd->result = (DID_ABORT << 16);
1475 
1476 				list_add_tail(SCSI_LIST(scb->cmd),
1477 						&adapter->completed_list);
1478 
1479 				mega_free_scb(adapter, scb);
1480 
1481 				continue;
1482 			}
1483 
1484 			/*
1485 			 * Was a reset issued for this command
1486 			 */
1487 			if( scb->state & SCB_RESET ) {
1488 
1489 				dev_warn(&adapter->dev->dev,
1490 					"reset cmd [%x] complete\n",
1491 					scb->idx);
1492 
1493 				scb->cmd->result = (DID_RESET << 16);
1494 
1495 				list_add_tail(SCSI_LIST(scb->cmd),
1496 						&adapter->completed_list);
1497 
1498 				mega_free_scb (adapter, scb);
1499 
1500 				continue;
1501 			}
1502 
1503 			cmd = scb->cmd;
1504 			pthru = scb->pthru;
1505 			epthru = scb->epthru;
1506 			mbox = (mbox_t *)scb->raw_mbox;
1507 
1508 #if MEGA_HAVE_STATS
1509 			{
1510 
1511 			int	logdrv = mbox->m_out.logdrv;
1512 
1513 			islogical = adapter->logdrv_chan[cmd->channel];
1514 			/*
1515 			 * Maintain an error counter for the logical drive.
1516 			 * Some application like SNMP agent need such
1517 			 * statistics
1518 			 */
1519 			if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1520 						cmd->cmnd[0] == READ_10 ||
1521 						cmd->cmnd[0] == READ_12)) {
1522 				/*
1523 				 * Logical drive number increases by 0x80 when
1524 				 * a logical drive is deleted
1525 				 */
1526 				adapter->rd_errors[logdrv%0x80]++;
1527 			}
1528 
1529 			if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1530 						cmd->cmnd[0] == WRITE_10 ||
1531 						cmd->cmnd[0] == WRITE_12)) {
1532 				/*
1533 				 * Logical drive number increases by 0x80 when
1534 				 * a logical drive is deleted
1535 				 */
1536 				adapter->wr_errors[logdrv%0x80]++;
1537 			}
1538 
1539 			}
1540 #endif
1541 		}
1542 
1543 		/*
1544 		 * Do not return the presence of hard disk on the channel so,
1545 		 * inquiry sent, and returned data==hard disk or removable
1546 		 * hard disk and not logical, request should return failure! -
1547 		 * PJ
1548 		 */
1549 		islogical = adapter->logdrv_chan[cmd->device->channel];
1550 		if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1551 
1552 			sgl = scsi_sglist(cmd);
1553 			if( sg_page(sgl) ) {
1554 				c = *(unsigned char *) sg_virt(&sgl[0]);
1555 			} else {
1556 				dev_warn(&adapter->dev->dev, "invalid sg\n");
1557 				c = 0;
1558 			}
1559 
1560 			if(IS_RAID_CH(adapter, cmd->device->channel) &&
1561 					((c & 0x1F ) == TYPE_DISK)) {
1562 				status = 0xF0;
1563 			}
1564 		}
1565 
1566 		/* clear result; otherwise, success returns corrupt value */
1567 		cmd->result = 0;
1568 
1569 		/* Convert MegaRAID status to Linux error code */
1570 		switch (status) {
1571 		case 0x00:	/* SUCCESS , i.e. SCSI_STATUS_GOOD */
1572 			cmd->result |= (DID_OK << 16);
1573 			break;
1574 
1575 		case 0x02:	/* ERROR_ABORTED, i.e.
1576 				   SCSI_STATUS_CHECK_CONDITION */
1577 
1578 			/* set sense_buffer and result fields */
1579 			if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1580 				mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1581 
1582 				memcpy(cmd->sense_buffer, pthru->reqsensearea,
1583 						14);
1584 
1585 				cmd->result = SAM_STAT_CHECK_CONDITION;
1586 			}
1587 			else {
1588 				if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1589 
1590 					memcpy(cmd->sense_buffer,
1591 						epthru->reqsensearea, 14);
1592 
1593 					cmd->result = SAM_STAT_CHECK_CONDITION;
1594 				} else
1595 					scsi_build_sense(cmd, 0,
1596 							 ABORTED_COMMAND, 0, 0);
1597 			}
1598 			break;
1599 
1600 		case 0x08:	/* ERR_DEST_DRIVE_FAILED, i.e.
1601 				   SCSI_STATUS_BUSY */
1602 			cmd->result |= (DID_BUS_BUSY << 16) | status;
1603 			break;
1604 
1605 		default:
1606 #if MEGA_HAVE_CLUSTERING
1607 			/*
1608 			 * If TEST_UNIT_READY fails, we know
1609 			 * MEGA_RESERVATION_STATUS failed
1610 			 */
1611 			if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1612 				cmd->result |= (DID_ERROR << 16) |
1613 					SAM_STAT_RESERVATION_CONFLICT;
1614 			}
1615 			else
1616 			/*
1617 			 * Error code returned is 1 if Reserve or Release
1618 			 * failed or the input parameter is invalid
1619 			 */
1620 			if( status == 1 &&
1621 				(cmd->cmnd[0] == RESERVE ||
1622 					 cmd->cmnd[0] == RELEASE) ) {
1623 
1624 				cmd->result |= (DID_ERROR << 16) |
1625 					SAM_STAT_RESERVATION_CONFLICT;
1626 			}
1627 			else
1628 #endif
1629 				cmd->result |= (DID_BAD_TARGET << 16)|status;
1630 		}
1631 
1632 		mega_free_scb(adapter, scb);
1633 
1634 		/* Add Scsi_Command to end of completed queue */
1635 		list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1636 	}
1637 }
1638 
1639 
1640 /*
1641  * mega_runpendq()
1642  *
1643  * Run through the list of completed requests and finish it
1644  */
1645 static void
mega_rundoneq(adapter_t * adapter)1646 mega_rundoneq (adapter_t *adapter)
1647 {
1648 	struct megaraid_cmd_priv *cmd_priv;
1649 
1650 	list_for_each_entry(cmd_priv, &adapter->completed_list, entry)
1651 		scsi_done(megaraid_to_scsi_cmd(cmd_priv));
1652 
1653 	INIT_LIST_HEAD(&adapter->completed_list);
1654 }
1655 
1656 
1657 /*
1658  * Free a SCB structure
1659  * Note: We assume the scsi commands associated with this scb is not free yet.
1660  */
1661 static void
mega_free_scb(adapter_t * adapter,scb_t * scb)1662 mega_free_scb(adapter_t *adapter, scb_t *scb)
1663 {
1664 	switch( scb->dma_type ) {
1665 
1666 	case MEGA_DMA_TYPE_NONE:
1667 		break;
1668 
1669 	case MEGA_SGLIST:
1670 		scsi_dma_unmap(scb->cmd);
1671 		break;
1672 	default:
1673 		break;
1674 	}
1675 
1676 	/*
1677 	 * Remove from the pending list
1678 	 */
1679 	list_del_init(&scb->list);
1680 
1681 	/* Link the scb back into free list */
1682 	scb->state = SCB_FREE;
1683 	scb->cmd = NULL;
1684 
1685 	list_add(&scb->list, &adapter->free_list);
1686 }
1687 
1688 
1689 static int
__mega_busywait_mbox(adapter_t * adapter)1690 __mega_busywait_mbox (adapter_t *adapter)
1691 {
1692 	volatile mbox_t *mbox = adapter->mbox;
1693 	long counter;
1694 
1695 	for (counter = 0; counter < 10000; counter++) {
1696 		if (!mbox->m_in.busy)
1697 			return 0;
1698 		udelay(100);
1699 		cond_resched();
1700 	}
1701 	return -1;		/* give up after 1 second */
1702 }
1703 
1704 /*
1705  * Copies data to SGLIST
1706  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1707  */
1708 static int
mega_build_sglist(adapter_t * adapter,scb_t * scb,u32 * buf,u32 * len)1709 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1710 {
1711 	struct scatterlist *sg;
1712 	struct scsi_cmnd	*cmd;
1713 	int	sgcnt;
1714 	int	idx;
1715 
1716 	cmd = scb->cmd;
1717 
1718 	/*
1719 	 * Copy Scatter-Gather list info into controller structure.
1720 	 *
1721 	 * The number of sg elements returned must not exceed our limit
1722 	 */
1723 	sgcnt = scsi_dma_map(cmd);
1724 
1725 	scb->dma_type = MEGA_SGLIST;
1726 
1727 	BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1728 
1729 	*len = 0;
1730 
1731 	if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1732 		sg = scsi_sglist(cmd);
1733 		scb->dma_h_bulkdata = sg_dma_address(sg);
1734 		*buf = (u32)scb->dma_h_bulkdata;
1735 		*len = sg_dma_len(sg);
1736 		return 0;
1737 	}
1738 
1739 	scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1740 		if (adapter->has_64bit_addr) {
1741 			scb->sgl64[idx].address = sg_dma_address(sg);
1742 			*len += scb->sgl64[idx].length = sg_dma_len(sg);
1743 		} else {
1744 			scb->sgl[idx].address = sg_dma_address(sg);
1745 			*len += scb->sgl[idx].length = sg_dma_len(sg);
1746 		}
1747 	}
1748 
1749 	/* Reset pointer and length fields */
1750 	*buf = scb->sgl_dma_addr;
1751 
1752 	/* Return count of SG requests */
1753 	return sgcnt;
1754 }
1755 
1756 
1757 /*
1758  * mega_8_to_40ld()
1759  *
1760  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1761  * Enquiry3 structures for later use
1762  */
1763 static void
mega_8_to_40ld(mraid_inquiry * inquiry,mega_inquiry3 * enquiry3,mega_product_info * product_info)1764 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1765 		mega_product_info *product_info)
1766 {
1767 	int i;
1768 
1769 	product_info->max_commands = inquiry->adapter_info.max_commands;
1770 	enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1771 	product_info->nchannels = inquiry->adapter_info.nchannels;
1772 
1773 	for (i = 0; i < 4; i++) {
1774 		product_info->fw_version[i] =
1775 			inquiry->adapter_info.fw_version[i];
1776 
1777 		product_info->bios_version[i] =
1778 			inquiry->adapter_info.bios_version[i];
1779 	}
1780 	enquiry3->cache_flush_interval =
1781 		inquiry->adapter_info.cache_flush_interval;
1782 
1783 	product_info->dram_size = inquiry->adapter_info.dram_size;
1784 
1785 	enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1786 
1787 	for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1788 		enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1789 		enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1790 		enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1791 	}
1792 
1793 	for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1794 		enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1795 }
1796 
1797 static inline void
mega_free_sgl(adapter_t * adapter)1798 mega_free_sgl(adapter_t *adapter)
1799 {
1800 	scb_t	*scb;
1801 	int	i;
1802 
1803 	for(i = 0; i < adapter->max_cmds; i++) {
1804 
1805 		scb = &adapter->scb_list[i];
1806 
1807 		if( scb->sgl64 ) {
1808 			dma_free_coherent(&adapter->dev->dev,
1809 					  sizeof(mega_sgl64) * adapter->sglen,
1810 					  scb->sgl64, scb->sgl_dma_addr);
1811 
1812 			scb->sgl64 = NULL;
1813 		}
1814 
1815 		if( scb->pthru ) {
1816 			dma_free_coherent(&adapter->dev->dev,
1817 					  sizeof(mega_passthru), scb->pthru,
1818 					  scb->pthru_dma_addr);
1819 
1820 			scb->pthru = NULL;
1821 		}
1822 
1823 		if( scb->epthru ) {
1824 			dma_free_coherent(&adapter->dev->dev,
1825 					  sizeof(mega_ext_passthru),
1826 					  scb->epthru, scb->epthru_dma_addr);
1827 
1828 			scb->epthru = NULL;
1829 		}
1830 
1831 	}
1832 }
1833 
1834 
1835 /*
1836  * Get information about the card/driver
1837  */
1838 const char *
megaraid_info(struct Scsi_Host * host)1839 megaraid_info(struct Scsi_Host *host)
1840 {
1841 	static char buffer[512];
1842 	adapter_t *adapter;
1843 
1844 	adapter = (adapter_t *)host->hostdata;
1845 
1846 	sprintf (buffer,
1847 		 "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1848 		 adapter->fw_version, adapter->product_info.max_commands,
1849 		 adapter->host->max_id, adapter->host->max_channel,
1850 		 (u32)adapter->host->max_lun);
1851 	return buffer;
1852 }
1853 
1854 /*
1855  * Abort a previous SCSI request. Only commands on the pending list can be
1856  * aborted. All the commands issued to the F/W must complete.
1857  */
1858 static int
megaraid_abort(struct scsi_cmnd * cmd)1859 megaraid_abort(struct scsi_cmnd *cmd)
1860 {
1861 	adapter_t	*adapter;
1862 	int		rval;
1863 
1864 	adapter = (adapter_t *)cmd->device->host->hostdata;
1865 
1866 	rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1867 
1868 	/*
1869 	 * This is required here to complete any completed requests
1870 	 * to be communicated over to the mid layer.
1871 	 */
1872 	mega_rundoneq(adapter);
1873 
1874 	return rval;
1875 }
1876 
1877 
1878 static int
megaraid_reset(struct scsi_cmnd * cmd)1879 megaraid_reset(struct scsi_cmnd *cmd)
1880 {
1881 	adapter_t	*adapter;
1882 	megacmd_t	mc;
1883 	int		rval;
1884 
1885 	adapter = (adapter_t *)cmd->device->host->hostdata;
1886 
1887 #if MEGA_HAVE_CLUSTERING
1888 	mc.cmd = MEGA_CLUSTER_CMD;
1889 	mc.opcode = MEGA_RESET_RESERVATIONS;
1890 
1891 	if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1892 		dev_warn(&adapter->dev->dev, "reservation reset failed\n");
1893 	}
1894 	else {
1895 		dev_info(&adapter->dev->dev, "reservation reset\n");
1896 	}
1897 #endif
1898 
1899 	spin_lock_irq(&adapter->lock);
1900 
1901 	rval =  megaraid_abort_and_reset(adapter, NULL, SCB_RESET);
1902 
1903 	/*
1904 	 * This is required here to complete any completed requests
1905 	 * to be communicated over to the mid layer.
1906 	 */
1907 	mega_rundoneq(adapter);
1908 	spin_unlock_irq(&adapter->lock);
1909 
1910 	return rval;
1911 }
1912 
1913 /**
1914  * megaraid_abort_and_reset()
1915  * @adapter: megaraid soft state
1916  * @cmd: scsi command to be aborted or reset
1917  * @aor: abort or reset flag
1918  *
1919  * Try to locate the scsi command in the pending queue. If found and is not
1920  * issued to the controller, abort/reset it. Otherwise return failure
1921  */
1922 static int
megaraid_abort_and_reset(adapter_t * adapter,struct scsi_cmnd * cmd,int aor)1923 megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
1924 {
1925 	struct list_head	*pos, *next;
1926 	scb_t			*scb;
1927 
1928 	if (aor == SCB_ABORT)
1929 		dev_warn(&adapter->dev->dev,
1930 			 "ABORTING cmd=%x <c=%d t=%d l=%d>\n",
1931 			 cmd->cmnd[0], cmd->device->channel,
1932 			 cmd->device->id, (u32)cmd->device->lun);
1933 	else
1934 		dev_warn(&adapter->dev->dev, "RESETTING\n");
1935 
1936 	if(list_empty(&adapter->pending_list))
1937 		return FAILED;
1938 
1939 	list_for_each_safe(pos, next, &adapter->pending_list) {
1940 
1941 		scb = list_entry(pos, scb_t, list);
1942 
1943 		if (!cmd || scb->cmd == cmd) { /* Found command */
1944 
1945 			scb->state |= aor;
1946 
1947 			/*
1948 			 * Check if this command has firmware ownership. If
1949 			 * yes, we cannot reset this command. Whenever f/w
1950 			 * completes this command, we will return appropriate
1951 			 * status from ISR.
1952 			 */
1953 			if( scb->state & SCB_ISSUED ) {
1954 
1955 				dev_warn(&adapter->dev->dev,
1956 					"%s[%x], fw owner\n",
1957 					(aor==SCB_ABORT) ? "ABORTING":"RESET",
1958 					scb->idx);
1959 
1960 				return FAILED;
1961 			}
1962 			/*
1963 			 * Not yet issued! Remove from the pending
1964 			 * list
1965 			 */
1966 			dev_warn(&adapter->dev->dev,
1967 				 "%s-[%x], driver owner\n",
1968 				 (cmd) ? "ABORTING":"RESET",
1969 				 scb->idx);
1970 			mega_free_scb(adapter, scb);
1971 
1972 			if (cmd) {
1973 				cmd->result = (DID_ABORT << 16);
1974 				list_add_tail(SCSI_LIST(cmd),
1975 					      &adapter->completed_list);
1976 			}
1977 
1978 			return SUCCESS;
1979 		}
1980 	}
1981 
1982 	return FAILED;
1983 }
1984 
1985 static inline int
make_local_pdev(adapter_t * adapter,struct pci_dev ** pdev)1986 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
1987 {
1988 	*pdev = pci_alloc_dev(NULL);
1989 
1990 	if( *pdev == NULL ) return -1;
1991 
1992 	memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
1993 
1994 	if (dma_set_mask(&(*pdev)->dev, DMA_BIT_MASK(32)) != 0) {
1995 		kfree(*pdev);
1996 		return -1;
1997 	}
1998 
1999 	return 0;
2000 }
2001 
2002 static inline void
free_local_pdev(struct pci_dev * pdev)2003 free_local_pdev(struct pci_dev *pdev)
2004 {
2005 	kfree(pdev);
2006 }
2007 
2008 /**
2009  * mega_allocate_inquiry()
2010  * @dma_handle: handle returned for dma address
2011  * @pdev: handle to pci device
2012  *
2013  * allocates memory for inquiry structure
2014  */
2015 static inline void *
mega_allocate_inquiry(dma_addr_t * dma_handle,struct pci_dev * pdev)2016 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2017 {
2018 	return dma_alloc_coherent(&pdev->dev, sizeof(mega_inquiry3),
2019 				  dma_handle, GFP_KERNEL);
2020 }
2021 
2022 
2023 static inline void
mega_free_inquiry(void * inquiry,dma_addr_t dma_handle,struct pci_dev * pdev)2024 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2025 {
2026 	dma_free_coherent(&pdev->dev, sizeof(mega_inquiry3), inquiry,
2027 			  dma_handle);
2028 }
2029 
2030 
2031 #ifdef CONFIG_PROC_FS
2032 /* Following code handles /proc fs  */
2033 
2034 /**
2035  * proc_show_config()
2036  * @m: Synthetic file construction data
2037  * @v: File iterator
2038  *
2039  * Display configuration information about the controller.
2040  */
2041 static int
proc_show_config(struct seq_file * m,void * v)2042 proc_show_config(struct seq_file *m, void *v)
2043 {
2044 
2045 	adapter_t *adapter = m->private;
2046 
2047 	seq_puts(m, MEGARAID_VERSION);
2048 	if(adapter->product_info.product_name[0])
2049 		seq_printf(m, "%s\n", adapter->product_info.product_name);
2050 
2051 	seq_puts(m, "Controller Type: ");
2052 
2053 	if( adapter->flag & BOARD_MEMMAP )
2054 		seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2055 	else
2056 		seq_puts(m, "418/428/434\n");
2057 
2058 	if(adapter->flag & BOARD_40LD)
2059 		seq_puts(m, "Controller Supports 40 Logical Drives\n");
2060 
2061 	if(adapter->flag & BOARD_64BIT)
2062 		seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2063 	if( adapter->has_64bit_addr )
2064 		seq_puts(m, "Controller using 64-bit memory addressing\n");
2065 	else
2066 		seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2067 
2068 	seq_printf(m, "Base = %08lx, Irq = %d, ",
2069 		   adapter->base, adapter->host->irq);
2070 
2071 	seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2072 		   adapter->numldrv, adapter->product_info.nchannels);
2073 
2074 	seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2075 		   adapter->fw_version, adapter->bios_version,
2076 		   adapter->product_info.dram_size);
2077 
2078 	seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2079 		   adapter->product_info.max_commands, adapter->max_cmds);
2080 
2081 	seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2082 	seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2083 	seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2084 	seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2085 	seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2086 	seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2087 	seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2088 	seq_printf(m, "quiescent          = %d\n",
2089 		   atomic_read(&adapter->quiescent));
2090 	seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2091 
2092 	seq_puts(m, "\nModule Parameters:\n");
2093 	seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2094 	seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2095 	return 0;
2096 }
2097 
2098 /**
2099  * proc_show_stat()
2100  * @m: Synthetic file construction data
2101  * @v: File iterator
2102  *
2103  * Display statistical information about the I/O activity.
2104  */
2105 static int
proc_show_stat(struct seq_file * m,void * v)2106 proc_show_stat(struct seq_file *m, void *v)
2107 {
2108 	adapter_t *adapter = m->private;
2109 #if MEGA_HAVE_STATS
2110 	int	i;
2111 #endif
2112 
2113 	seq_puts(m, "Statistical Information for this controller\n");
2114 	seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2115 #if MEGA_HAVE_STATS
2116 	for(i = 0; i < adapter->numldrv; i++) {
2117 		seq_printf(m, "Logical Drive %d:\n", i);
2118 		seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2119 			   adapter->nreads[i], adapter->nwrites[i]);
2120 		seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2121 			   adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2122 		seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2123 			   adapter->rd_errors[i], adapter->wr_errors[i]);
2124 	}
2125 #else
2126 	seq_puts(m, "IO and error counters not compiled in driver.\n");
2127 #endif
2128 	return 0;
2129 }
2130 
2131 
2132 /**
2133  * proc_show_mbox()
2134  * @m: Synthetic file construction data
2135  * @v: File iterator
2136  *
2137  * Display mailbox information for the last command issued. This information
2138  * is good for debugging.
2139  */
2140 static int
proc_show_mbox(struct seq_file * m,void * v)2141 proc_show_mbox(struct seq_file *m, void *v)
2142 {
2143 	adapter_t	*adapter = m->private;
2144 	volatile mbox_t	*mbox = adapter->mbox;
2145 
2146 	seq_puts(m, "Contents of Mail Box Structure\n");
2147 	seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2148 	seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2149 	seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2150 	seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2151 	seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2152 	seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2153 	seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2154 	seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2155 	seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2156 	return 0;
2157 }
2158 
2159 
2160 /**
2161  * proc_show_rebuild_rate()
2162  * @m: Synthetic file construction data
2163  * @v: File iterator
2164  *
2165  * Display current rebuild rate
2166  */
2167 static int
proc_show_rebuild_rate(struct seq_file * m,void * v)2168 proc_show_rebuild_rate(struct seq_file *m, void *v)
2169 {
2170 	adapter_t	*adapter = m->private;
2171 	dma_addr_t	dma_handle;
2172 	caddr_t		inquiry;
2173 	struct pci_dev	*pdev;
2174 
2175 	if( make_local_pdev(adapter, &pdev) != 0 )
2176 		return 0;
2177 
2178 	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2179 		goto free_pdev;
2180 
2181 	if( mega_adapinq(adapter, dma_handle) != 0 ) {
2182 		seq_puts(m, "Adapter inquiry failed.\n");
2183 		dev_warn(&adapter->dev->dev, "inquiry failed\n");
2184 		goto free_inquiry;
2185 	}
2186 
2187 	if( adapter->flag & BOARD_40LD )
2188 		seq_printf(m, "Rebuild Rate: [%d%%]\n",
2189 			   ((mega_inquiry3 *)inquiry)->rebuild_rate);
2190 	else
2191 		seq_printf(m, "Rebuild Rate: [%d%%]\n",
2192 			((mraid_ext_inquiry *)
2193 			 inquiry)->raid_inq.adapter_info.rebuild_rate);
2194 
2195 free_inquiry:
2196 	mega_free_inquiry(inquiry, dma_handle, pdev);
2197 free_pdev:
2198 	free_local_pdev(pdev);
2199 	return 0;
2200 }
2201 
2202 
2203 /**
2204  * proc_show_battery()
2205  * @m: Synthetic file construction data
2206  * @v: File iterator
2207  *
2208  * Display information about the battery module on the controller.
2209  */
2210 static int
proc_show_battery(struct seq_file * m,void * v)2211 proc_show_battery(struct seq_file *m, void *v)
2212 {
2213 	adapter_t	*adapter = m->private;
2214 	dma_addr_t	dma_handle;
2215 	caddr_t		inquiry;
2216 	struct pci_dev	*pdev;
2217 	u8	battery_status;
2218 
2219 	if( make_local_pdev(adapter, &pdev) != 0 )
2220 		return 0;
2221 
2222 	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2223 		goto free_pdev;
2224 
2225 	if( mega_adapinq(adapter, dma_handle) != 0 ) {
2226 		seq_puts(m, "Adapter inquiry failed.\n");
2227 		dev_warn(&adapter->dev->dev, "inquiry failed\n");
2228 		goto free_inquiry;
2229 	}
2230 
2231 	if( adapter->flag & BOARD_40LD ) {
2232 		battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2233 	}
2234 	else {
2235 		battery_status = ((mraid_ext_inquiry *)inquiry)->
2236 			raid_inq.adapter_info.battery_status;
2237 	}
2238 
2239 	/*
2240 	 * Decode the battery status
2241 	 */
2242 	seq_printf(m, "Battery Status:[%d]", battery_status);
2243 
2244 	if(battery_status == MEGA_BATT_CHARGE_DONE)
2245 		seq_puts(m, " Charge Done");
2246 
2247 	if(battery_status & MEGA_BATT_MODULE_MISSING)
2248 		seq_puts(m, " Module Missing");
2249 
2250 	if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2251 		seq_puts(m, " Low Voltage");
2252 
2253 	if(battery_status & MEGA_BATT_TEMP_HIGH)
2254 		seq_puts(m, " Temperature High");
2255 
2256 	if(battery_status & MEGA_BATT_PACK_MISSING)
2257 		seq_puts(m, " Pack Missing");
2258 
2259 	if(battery_status & MEGA_BATT_CHARGE_INPROG)
2260 		seq_puts(m, " Charge In-progress");
2261 
2262 	if(battery_status & MEGA_BATT_CHARGE_FAIL)
2263 		seq_puts(m, " Charge Fail");
2264 
2265 	if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2266 		seq_puts(m, " Cycles Exceeded");
2267 
2268 	seq_putc(m, '\n');
2269 
2270 free_inquiry:
2271 	mega_free_inquiry(inquiry, dma_handle, pdev);
2272 free_pdev:
2273 	free_local_pdev(pdev);
2274 	return 0;
2275 }
2276 
2277 
2278 /*
2279  * Display scsi inquiry
2280  */
2281 static void
mega_print_inquiry(struct seq_file * m,char * scsi_inq)2282 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2283 {
2284 	int	i;
2285 
2286 	seq_puts(m, "  Vendor: ");
2287 	seq_write(m, scsi_inq + 8, 8);
2288 	seq_puts(m, "  Model: ");
2289 	seq_write(m, scsi_inq + 16, 16);
2290 	seq_puts(m, "  Rev: ");
2291 	seq_write(m, scsi_inq + 32, 4);
2292 	seq_putc(m, '\n');
2293 
2294 	i = scsi_inq[0] & 0x1f;
2295 	seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2296 
2297 	seq_printf(m, "                 ANSI SCSI revision: %02x",
2298 		   scsi_inq[2] & 0x07);
2299 
2300 	if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2301 		seq_puts(m, " CCS\n");
2302 	else
2303 		seq_putc(m, '\n');
2304 }
2305 
2306 /**
2307  * proc_show_pdrv()
2308  * @m: Synthetic file construction data
2309  * @adapter: pointer to our soft state
2310  * @channel: channel
2311  *
2312  * Display information about the physical drives.
2313  */
2314 static int
proc_show_pdrv(struct seq_file * m,adapter_t * adapter,int channel)2315 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2316 {
2317 	dma_addr_t	dma_handle;
2318 	char		*scsi_inq;
2319 	dma_addr_t	scsi_inq_dma_handle;
2320 	caddr_t		inquiry;
2321 	struct pci_dev	*pdev;
2322 	u8	*pdrv_state;
2323 	u8	state;
2324 	int	tgt;
2325 	int	max_channels;
2326 	int	i;
2327 
2328 	if( make_local_pdev(adapter, &pdev) != 0 )
2329 		return 0;
2330 
2331 	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2332 		goto free_pdev;
2333 
2334 	if( mega_adapinq(adapter, dma_handle) != 0 ) {
2335 		seq_puts(m, "Adapter inquiry failed.\n");
2336 		dev_warn(&adapter->dev->dev, "inquiry failed\n");
2337 		goto free_inquiry;
2338 	}
2339 
2340 
2341 	scsi_inq = dma_alloc_coherent(&pdev->dev, 256, &scsi_inq_dma_handle,
2342 				      GFP_KERNEL);
2343 	if( scsi_inq == NULL ) {
2344 		seq_puts(m, "memory not available for scsi inq.\n");
2345 		goto free_inquiry;
2346 	}
2347 
2348 	if( adapter->flag & BOARD_40LD ) {
2349 		pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2350 	}
2351 	else {
2352 		pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2353 			raid_inq.pdrv_info.pdrv_state;
2354 	}
2355 
2356 	max_channels = adapter->product_info.nchannels;
2357 
2358 	if( channel >= max_channels ) {
2359 		goto free_pci;
2360 	}
2361 
2362 	for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2363 
2364 		i = channel*16 + tgt;
2365 
2366 		state = *(pdrv_state + i);
2367 		switch( state & 0x0F ) {
2368 		case PDRV_ONLINE:
2369 			seq_printf(m, "Channel:%2d Id:%2d State: Online",
2370 				   channel, tgt);
2371 			break;
2372 
2373 		case PDRV_FAILED:
2374 			seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2375 				   channel, tgt);
2376 			break;
2377 
2378 		case PDRV_RBLD:
2379 			seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2380 				   channel, tgt);
2381 			break;
2382 
2383 		case PDRV_HOTSPARE:
2384 			seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2385 				   channel, tgt);
2386 			break;
2387 
2388 		default:
2389 			seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2390 				   channel, tgt);
2391 			break;
2392 		}
2393 
2394 		/*
2395 		 * This interface displays inquiries for disk drives
2396 		 * only. Inquries for logical drives and non-disk
2397 		 * devices are available through /proc/scsi/scsi
2398 		 */
2399 		memset(scsi_inq, 0, 256);
2400 		if( mega_internal_dev_inquiry(adapter, channel, tgt,
2401 				scsi_inq_dma_handle) ||
2402 				(scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2403 			continue;
2404 		}
2405 
2406 		/*
2407 		 * Check for overflow. We print less than 240
2408 		 * characters for inquiry
2409 		 */
2410 		seq_puts(m, ".\n");
2411 		mega_print_inquiry(m, scsi_inq);
2412 	}
2413 
2414 free_pci:
2415 	dma_free_coherent(&pdev->dev, 256, scsi_inq, scsi_inq_dma_handle);
2416 free_inquiry:
2417 	mega_free_inquiry(inquiry, dma_handle, pdev);
2418 free_pdev:
2419 	free_local_pdev(pdev);
2420 	return 0;
2421 }
2422 
2423 /**
2424  * proc_show_pdrv_ch0()
2425  * @m: Synthetic file construction data
2426  * @v: File iterator
2427  *
2428  * Display information about the physical drives on physical channel 0.
2429  */
2430 static int
proc_show_pdrv_ch0(struct seq_file * m,void * v)2431 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2432 {
2433 	return proc_show_pdrv(m, m->private, 0);
2434 }
2435 
2436 
2437 /**
2438  * proc_show_pdrv_ch1()
2439  * @m: Synthetic file construction data
2440  * @v: File iterator
2441  *
2442  * Display information about the physical drives on physical channel 1.
2443  */
2444 static int
proc_show_pdrv_ch1(struct seq_file * m,void * v)2445 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2446 {
2447 	return proc_show_pdrv(m, m->private, 1);
2448 }
2449 
2450 
2451 /**
2452  * proc_show_pdrv_ch2()
2453  * @m: Synthetic file construction data
2454  * @v: File iterator
2455  *
2456  * Display information about the physical drives on physical channel 2.
2457  */
2458 static int
proc_show_pdrv_ch2(struct seq_file * m,void * v)2459 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2460 {
2461 	return proc_show_pdrv(m, m->private, 2);
2462 }
2463 
2464 
2465 /**
2466  * proc_show_pdrv_ch3()
2467  * @m: Synthetic file construction data
2468  * @v: File iterator
2469  *
2470  * Display information about the physical drives on physical channel 3.
2471  */
2472 static int
proc_show_pdrv_ch3(struct seq_file * m,void * v)2473 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2474 {
2475 	return proc_show_pdrv(m, m->private, 3);
2476 }
2477 
2478 
2479 /**
2480  * proc_show_rdrv()
2481  * @m: Synthetic file construction data
2482  * @adapter: pointer to our soft state
2483  * @start: starting logical drive to display
2484  * @end: ending logical drive to display
2485  *
2486  * We do not print the inquiry information since its already available through
2487  * /proc/scsi/scsi interface
2488  */
2489 static int
proc_show_rdrv(struct seq_file * m,adapter_t * adapter,int start,int end)2490 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2491 {
2492 	dma_addr_t	dma_handle;
2493 	logdrv_param	*lparam;
2494 	megacmd_t	mc;
2495 	char		*disk_array;
2496 	dma_addr_t	disk_array_dma_handle;
2497 	caddr_t		inquiry;
2498 	struct pci_dev	*pdev;
2499 	u8	*rdrv_state;
2500 	int	num_ldrv;
2501 	u32	array_sz;
2502 	int	i;
2503 
2504 	if( make_local_pdev(adapter, &pdev) != 0 )
2505 		return 0;
2506 
2507 	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2508 		goto free_pdev;
2509 
2510 	if( mega_adapinq(adapter, dma_handle) != 0 ) {
2511 		seq_puts(m, "Adapter inquiry failed.\n");
2512 		dev_warn(&adapter->dev->dev, "inquiry failed\n");
2513 		goto free_inquiry;
2514 	}
2515 
2516 	memset(&mc, 0, sizeof(megacmd_t));
2517 
2518 	if( adapter->flag & BOARD_40LD ) {
2519 		array_sz = sizeof(disk_array_40ld);
2520 
2521 		rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2522 
2523 		num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2524 	}
2525 	else {
2526 		array_sz = sizeof(disk_array_8ld);
2527 
2528 		rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2529 			raid_inq.logdrv_info.ldrv_state;
2530 
2531 		num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2532 			raid_inq.logdrv_info.num_ldrv;
2533 	}
2534 
2535 	disk_array = dma_alloc_coherent(&pdev->dev, array_sz,
2536 					&disk_array_dma_handle, GFP_KERNEL);
2537 
2538 	if( disk_array == NULL ) {
2539 		seq_puts(m, "memory not available.\n");
2540 		goto free_inquiry;
2541 	}
2542 
2543 	mc.xferaddr = (u32)disk_array_dma_handle;
2544 
2545 	if( adapter->flag & BOARD_40LD ) {
2546 		mc.cmd = FC_NEW_CONFIG;
2547 		mc.opcode = OP_DCMD_READ_CONFIG;
2548 
2549 		if( mega_internal_command(adapter, &mc, NULL) ) {
2550 			seq_puts(m, "40LD read config failed.\n");
2551 			goto free_pci;
2552 		}
2553 
2554 	}
2555 	else {
2556 		mc.cmd = NEW_READ_CONFIG_8LD;
2557 
2558 		if( mega_internal_command(adapter, &mc, NULL) ) {
2559 			mc.cmd = READ_CONFIG_8LD;
2560 			if( mega_internal_command(adapter, &mc, NULL) ) {
2561 				seq_puts(m, "8LD read config failed.\n");
2562 				goto free_pci;
2563 			}
2564 		}
2565 	}
2566 
2567 	for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2568 
2569 		if( adapter->flag & BOARD_40LD ) {
2570 			lparam =
2571 			&((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2572 		}
2573 		else {
2574 			lparam =
2575 			&((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2576 		}
2577 
2578 		/*
2579 		 * Check for overflow. We print less than 240 characters for
2580 		 * information about each logical drive.
2581 		 */
2582 		seq_printf(m, "Logical drive:%2d:, ", i);
2583 
2584 		switch( rdrv_state[i] & 0x0F ) {
2585 		case RDRV_OFFLINE:
2586 			seq_puts(m, "state: offline");
2587 			break;
2588 		case RDRV_DEGRADED:
2589 			seq_puts(m, "state: degraded");
2590 			break;
2591 		case RDRV_OPTIMAL:
2592 			seq_puts(m, "state: optimal");
2593 			break;
2594 		case RDRV_DELETED:
2595 			seq_puts(m, "state: deleted");
2596 			break;
2597 		default:
2598 			seq_puts(m, "state: unknown");
2599 			break;
2600 		}
2601 
2602 		/*
2603 		 * Check if check consistency or initialization is going on
2604 		 * for this logical drive.
2605 		 */
2606 		if( (rdrv_state[i] & 0xF0) == 0x20 )
2607 			seq_puts(m, ", check-consistency in progress");
2608 		else if( (rdrv_state[i] & 0xF0) == 0x10 )
2609 			seq_puts(m, ", initialization in progress");
2610 
2611 		seq_putc(m, '\n');
2612 
2613 		seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2614 		seq_printf(m, "RAID level:%3d, ", lparam->level);
2615 		seq_printf(m, "Stripe size:%3d, ",
2616 			   lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2617 		seq_printf(m, "Row size:%3d\n", lparam->row_size);
2618 
2619 		seq_puts(m, "Read Policy: ");
2620 		switch(lparam->read_ahead) {
2621 		case NO_READ_AHEAD:
2622 			seq_puts(m, "No read ahead, ");
2623 			break;
2624 		case READ_AHEAD:
2625 			seq_puts(m, "Read ahead, ");
2626 			break;
2627 		case ADAP_READ_AHEAD:
2628 			seq_puts(m, "Adaptive, ");
2629 			break;
2630 
2631 		}
2632 
2633 		seq_puts(m, "Write Policy: ");
2634 		switch(lparam->write_mode) {
2635 		case WRMODE_WRITE_THRU:
2636 			seq_puts(m, "Write thru, ");
2637 			break;
2638 		case WRMODE_WRITE_BACK:
2639 			seq_puts(m, "Write back, ");
2640 			break;
2641 		}
2642 
2643 		seq_puts(m, "Cache Policy: ");
2644 		switch(lparam->direct_io) {
2645 		case CACHED_IO:
2646 			seq_puts(m, "Cached IO\n\n");
2647 			break;
2648 		case DIRECT_IO:
2649 			seq_puts(m, "Direct IO\n\n");
2650 			break;
2651 		}
2652 	}
2653 
2654 free_pci:
2655 	dma_free_coherent(&pdev->dev, array_sz, disk_array,
2656 			  disk_array_dma_handle);
2657 free_inquiry:
2658 	mega_free_inquiry(inquiry, dma_handle, pdev);
2659 free_pdev:
2660 	free_local_pdev(pdev);
2661 	return 0;
2662 }
2663 
2664 /**
2665  * proc_show_rdrv_10()
2666  * @m: Synthetic file construction data
2667  * @v: File iterator
2668  *
2669  * Display real time information about the logical drives 0 through 9.
2670  */
2671 static int
proc_show_rdrv_10(struct seq_file * m,void * v)2672 proc_show_rdrv_10(struct seq_file *m, void *v)
2673 {
2674 	return proc_show_rdrv(m, m->private, 0, 9);
2675 }
2676 
2677 
2678 /**
2679  * proc_show_rdrv_20()
2680  * @m: Synthetic file construction data
2681  * @v: File iterator
2682  *
2683  * Display real time information about the logical drives 0 through 9.
2684  */
2685 static int
proc_show_rdrv_20(struct seq_file * m,void * v)2686 proc_show_rdrv_20(struct seq_file *m, void *v)
2687 {
2688 	return proc_show_rdrv(m, m->private, 10, 19);
2689 }
2690 
2691 
2692 /**
2693  * proc_show_rdrv_30()
2694  * @m: Synthetic file construction data
2695  * @v: File iterator
2696  *
2697  * Display real time information about the logical drives 0 through 9.
2698  */
2699 static int
proc_show_rdrv_30(struct seq_file * m,void * v)2700 proc_show_rdrv_30(struct seq_file *m, void *v)
2701 {
2702 	return proc_show_rdrv(m, m->private, 20, 29);
2703 }
2704 
2705 
2706 /**
2707  * proc_show_rdrv_40()
2708  * @m: Synthetic file construction data
2709  * @v: File iterator
2710  *
2711  * Display real time information about the logical drives 0 through 9.
2712  */
2713 static int
proc_show_rdrv_40(struct seq_file * m,void * v)2714 proc_show_rdrv_40(struct seq_file *m, void *v)
2715 {
2716 	return proc_show_rdrv(m, m->private, 30, 39);
2717 }
2718 
2719 /**
2720  * mega_create_proc_entry()
2721  * @index: index in soft state array
2722  * @parent: parent node for this /proc entry
2723  *
2724  * Creates /proc entries for our controllers.
2725  */
2726 static void
mega_create_proc_entry(int index,struct proc_dir_entry * parent)2727 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2728 {
2729 	adapter_t *adapter = hba_soft_state[index];
2730 	struct proc_dir_entry *dir;
2731 	u8 string[16];
2732 
2733 	sprintf(string, "hba%d", adapter->host->host_no);
2734 	dir = proc_mkdir_data(string, 0, parent, adapter);
2735 	if (!dir) {
2736 		dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
2737 		return;
2738 	}
2739 
2740 	proc_create_single_data("config", S_IRUSR, dir,
2741 			proc_show_config, adapter);
2742 	proc_create_single_data("stat", S_IRUSR, dir,
2743 			proc_show_stat, adapter);
2744 	proc_create_single_data("mailbox", S_IRUSR, dir,
2745 			proc_show_mbox, adapter);
2746 #if MEGA_HAVE_ENH_PROC
2747 	proc_create_single_data("rebuild-rate", S_IRUSR, dir,
2748 			proc_show_rebuild_rate, adapter);
2749 	proc_create_single_data("battery-status", S_IRUSR, dir,
2750 			proc_show_battery, adapter);
2751 	proc_create_single_data("diskdrives-ch0", S_IRUSR, dir,
2752 			proc_show_pdrv_ch0, adapter);
2753 	proc_create_single_data("diskdrives-ch1", S_IRUSR, dir,
2754 			proc_show_pdrv_ch1, adapter);
2755 	proc_create_single_data("diskdrives-ch2", S_IRUSR, dir,
2756 			proc_show_pdrv_ch2, adapter);
2757 	proc_create_single_data("diskdrives-ch3", S_IRUSR, dir,
2758 			proc_show_pdrv_ch3, adapter);
2759 	proc_create_single_data("raiddrives-0-9", S_IRUSR, dir,
2760 			proc_show_rdrv_10, adapter);
2761 	proc_create_single_data("raiddrives-10-19", S_IRUSR, dir,
2762 			proc_show_rdrv_20, adapter);
2763 	proc_create_single_data("raiddrives-20-29", S_IRUSR, dir,
2764 			proc_show_rdrv_30, adapter);
2765 	proc_create_single_data("raiddrives-30-39", S_IRUSR, dir,
2766 			proc_show_rdrv_40, adapter);
2767 #endif
2768 }
2769 
2770 #else
mega_create_proc_entry(int index,struct proc_dir_entry * parent)2771 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2772 {
2773 }
2774 #endif
2775 
2776 
2777 /*
2778  * megaraid_biosparam()
2779  *
2780  * Return the disk geometry for a particular disk
2781  */
2782 static int
megaraid_biosparam(struct scsi_device * sdev,struct block_device * bdev,sector_t capacity,int geom[])2783 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2784 		    sector_t capacity, int geom[])
2785 {
2786 	adapter_t	*adapter;
2787 	int	heads;
2788 	int	sectors;
2789 	int	cylinders;
2790 
2791 	/* Get pointer to host config structure */
2792 	adapter = (adapter_t *)sdev->host->hostdata;
2793 
2794 	if (IS_RAID_CH(adapter, sdev->channel)) {
2795 			/* Default heads (64) & sectors (32) */
2796 			heads = 64;
2797 			sectors = 32;
2798 			cylinders = (ulong)capacity / (heads * sectors);
2799 
2800 			/*
2801 			 * Handle extended translation size for logical drives
2802 			 * > 1Gb
2803 			 */
2804 			if ((ulong)capacity >= 0x200000) {
2805 				heads = 255;
2806 				sectors = 63;
2807 				cylinders = (ulong)capacity / (heads * sectors);
2808 			}
2809 
2810 			/* return result */
2811 			geom[0] = heads;
2812 			geom[1] = sectors;
2813 			geom[2] = cylinders;
2814 	}
2815 	else {
2816 		if (scsi_partsize(bdev, capacity, geom))
2817 			return 0;
2818 
2819 		dev_info(&adapter->dev->dev,
2820 			 "invalid partition on this disk on channel %d\n",
2821 			 sdev->channel);
2822 
2823 		/* Default heads (64) & sectors (32) */
2824 		heads = 64;
2825 		sectors = 32;
2826 		cylinders = (ulong)capacity / (heads * sectors);
2827 
2828 		/* Handle extended translation size for logical drives > 1Gb */
2829 		if ((ulong)capacity >= 0x200000) {
2830 			heads = 255;
2831 			sectors = 63;
2832 			cylinders = (ulong)capacity / (heads * sectors);
2833 		}
2834 
2835 		/* return result */
2836 		geom[0] = heads;
2837 		geom[1] = sectors;
2838 		geom[2] = cylinders;
2839 	}
2840 
2841 	return 0;
2842 }
2843 
2844 /**
2845  * mega_init_scb()
2846  * @adapter: pointer to our soft state
2847  *
2848  * Allocate memory for the various pointers in the scb structures:
2849  * scatter-gather list pointer, passthru and extended passthru structure
2850  * pointers.
2851  */
2852 static int
mega_init_scb(adapter_t * adapter)2853 mega_init_scb(adapter_t *adapter)
2854 {
2855 	scb_t	*scb;
2856 	int	i;
2857 
2858 	for( i = 0; i < adapter->max_cmds; i++ ) {
2859 
2860 		scb = &adapter->scb_list[i];
2861 
2862 		scb->sgl64 = NULL;
2863 		scb->sgl = NULL;
2864 		scb->pthru = NULL;
2865 		scb->epthru = NULL;
2866 	}
2867 
2868 	for( i = 0; i < adapter->max_cmds; i++ ) {
2869 
2870 		scb = &adapter->scb_list[i];
2871 
2872 		scb->idx = i;
2873 
2874 		scb->sgl64 = dma_alloc_coherent(&adapter->dev->dev,
2875 						sizeof(mega_sgl64) * adapter->sglen,
2876 						&scb->sgl_dma_addr, GFP_KERNEL);
2877 
2878 		scb->sgl = (mega_sglist *)scb->sgl64;
2879 
2880 		if( !scb->sgl ) {
2881 			dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
2882 			mega_free_sgl(adapter);
2883 			return -1;
2884 		}
2885 
2886 		scb->pthru = dma_alloc_coherent(&adapter->dev->dev,
2887 						sizeof(mega_passthru),
2888 						&scb->pthru_dma_addr, GFP_KERNEL);
2889 
2890 		if( !scb->pthru ) {
2891 			dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
2892 			mega_free_sgl(adapter);
2893 			return -1;
2894 		}
2895 
2896 		scb->epthru = dma_alloc_coherent(&adapter->dev->dev,
2897 						 sizeof(mega_ext_passthru),
2898 						 &scb->epthru_dma_addr, GFP_KERNEL);
2899 
2900 		if( !scb->epthru ) {
2901 			dev_warn(&adapter->dev->dev,
2902 				"Can't allocate extended passthru\n");
2903 			mega_free_sgl(adapter);
2904 			return -1;
2905 		}
2906 
2907 
2908 		scb->dma_type = MEGA_DMA_TYPE_NONE;
2909 
2910 		/*
2911 		 * Link to free list
2912 		 * lock not required since we are loading the driver, so no
2913 		 * commands possible right now.
2914 		 */
2915 		scb->state = SCB_FREE;
2916 		scb->cmd = NULL;
2917 		list_add(&scb->list, &adapter->free_list);
2918 	}
2919 
2920 	return 0;
2921 }
2922 
2923 
2924 /**
2925  * megadev_open()
2926  * @inode: unused
2927  * @filep: unused
2928  *
2929  * Routines for the character/ioctl interface to the driver. Find out if this
2930  * is a valid open.
2931  */
2932 static int
megadev_open(struct inode * inode,struct file * filep)2933 megadev_open (struct inode *inode, struct file *filep)
2934 {
2935 	/*
2936 	 * Only allow superuser to access private ioctl interface
2937 	 */
2938 	if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2939 
2940 	return 0;
2941 }
2942 
2943 
2944 /**
2945  * megadev_ioctl()
2946  * @filep: Our device file
2947  * @cmd: ioctl command
2948  * @arg: user buffer
2949  *
2950  * ioctl entry point for our private ioctl interface. We move the data in from
2951  * the user space, prepare the command (if necessary, convert the old MIMD
2952  * ioctl to new ioctl command), and issue a synchronous command to the
2953  * controller.
2954  */
2955 static int
megadev_ioctl(struct file * filep,unsigned int cmd,unsigned long arg)2956 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
2957 {
2958 	adapter_t	*adapter;
2959 	nitioctl_t	uioc;
2960 	int		adapno;
2961 	int		rval;
2962 	mega_passthru	__user *upthru;	/* user address for passthru */
2963 	mega_passthru	*pthru;		/* copy user passthru here */
2964 	dma_addr_t	pthru_dma_hndl;
2965 	void		*data = NULL;	/* data to be transferred */
2966 	dma_addr_t	data_dma_hndl;	/* dma handle for data xfer area */
2967 	megacmd_t	mc;
2968 #if MEGA_HAVE_STATS
2969 	megastat_t	__user *ustats = NULL;
2970 	int		num_ldrv = 0;
2971 #endif
2972 	u32		uxferaddr = 0;
2973 	struct pci_dev	*pdev;
2974 
2975 	/*
2976 	 * Make sure only USCSICMD are issued through this interface.
2977 	 * MIMD application would still fire different command.
2978 	 */
2979 	if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
2980 		return -EINVAL;
2981 	}
2982 
2983 	/*
2984 	 * Check and convert a possible MIMD command to NIT command.
2985 	 * mega_m_to_n() copies the data from the user space, so we do not
2986 	 * have to do it here.
2987 	 * NOTE: We will need some user address to copyout the data, therefore
2988 	 * the inteface layer will also provide us with the required user
2989 	 * addresses.
2990 	 */
2991 	memset(&uioc, 0, sizeof(nitioctl_t));
2992 	if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
2993 		return rval;
2994 
2995 
2996 	switch( uioc.opcode ) {
2997 
2998 	case GET_DRIVER_VER:
2999 		if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3000 			return (-EFAULT);
3001 
3002 		break;
3003 
3004 	case GET_N_ADAP:
3005 		if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3006 			return (-EFAULT);
3007 
3008 		/*
3009 		 * Shucks. MIMD interface returns a positive value for number
3010 		 * of adapters. TODO: Change it to return 0 when there is no
3011 		 * applicatio using mimd interface.
3012 		 */
3013 		return hba_count;
3014 
3015 	case GET_ADAP_INFO:
3016 
3017 		/*
3018 		 * Which adapter
3019 		 */
3020 		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3021 			return (-ENODEV);
3022 
3023 		if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3024 				sizeof(struct mcontroller)) )
3025 			return (-EFAULT);
3026 		break;
3027 
3028 #if MEGA_HAVE_STATS
3029 
3030 	case GET_STATS:
3031 		/*
3032 		 * Which adapter
3033 		 */
3034 		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3035 			return (-ENODEV);
3036 
3037 		adapter = hba_soft_state[adapno];
3038 
3039 		ustats = uioc.uioc_uaddr;
3040 
3041 		if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3042 			return (-EFAULT);
3043 
3044 		/*
3045 		 * Check for the validity of the logical drive number
3046 		 */
3047 		if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3048 
3049 		if( copy_to_user(ustats->nreads, adapter->nreads,
3050 					num_ldrv*sizeof(u32)) )
3051 			return -EFAULT;
3052 
3053 		if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3054 					num_ldrv*sizeof(u32)) )
3055 			return -EFAULT;
3056 
3057 		if( copy_to_user(ustats->nwrites, adapter->nwrites,
3058 					num_ldrv*sizeof(u32)) )
3059 			return -EFAULT;
3060 
3061 		if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3062 					num_ldrv*sizeof(u32)) )
3063 			return -EFAULT;
3064 
3065 		if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3066 					num_ldrv*sizeof(u32)) )
3067 			return -EFAULT;
3068 
3069 		if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3070 					num_ldrv*sizeof(u32)) )
3071 			return -EFAULT;
3072 
3073 		return 0;
3074 
3075 #endif
3076 	case MBOX_CMD:
3077 
3078 		/*
3079 		 * Which adapter
3080 		 */
3081 		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3082 			return (-ENODEV);
3083 
3084 		adapter = hba_soft_state[adapno];
3085 
3086 		/*
3087 		 * Deletion of logical drive is a special case. The adapter
3088 		 * should be quiescent before this command is issued.
3089 		 */
3090 		if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3091 				uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3092 
3093 			/*
3094 			 * Do we support this feature
3095 			 */
3096 			if( !adapter->support_random_del ) {
3097 				dev_warn(&adapter->dev->dev, "logdrv "
3098 					"delete on non-supporting F/W\n");
3099 
3100 				return (-EINVAL);
3101 			}
3102 
3103 			rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3104 
3105 			if( rval == 0 ) {
3106 				memset(&mc, 0, sizeof(megacmd_t));
3107 
3108 				mc.status = rval;
3109 
3110 				rval = mega_n_to_m((void __user *)arg, &mc);
3111 			}
3112 
3113 			return rval;
3114 		}
3115 		/*
3116 		 * This interface only support the regular passthru commands.
3117 		 * Reject extended passthru and 64-bit passthru
3118 		 */
3119 		if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3120 			uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3121 
3122 			dev_warn(&adapter->dev->dev, "rejected passthru\n");
3123 
3124 			return (-EINVAL);
3125 		}
3126 
3127 		/*
3128 		 * For all internal commands, the buffer must be allocated in
3129 		 * <4GB address range
3130 		 */
3131 		if( make_local_pdev(adapter, &pdev) != 0 )
3132 			return -EIO;
3133 
3134 		/* Is it a passthru command or a DCMD */
3135 		if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3136 			/* Passthru commands */
3137 
3138 			pthru = dma_alloc_coherent(&pdev->dev,
3139 						   sizeof(mega_passthru),
3140 						   &pthru_dma_hndl, GFP_KERNEL);
3141 
3142 			if( pthru == NULL ) {
3143 				free_local_pdev(pdev);
3144 				return (-ENOMEM);
3145 			}
3146 
3147 			/*
3148 			 * The user passthru structure
3149 			 */
3150 			upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3151 
3152 			/*
3153 			 * Copy in the user passthru here.
3154 			 */
3155 			if( copy_from_user(pthru, upthru,
3156 						sizeof(mega_passthru)) ) {
3157 
3158 				dma_free_coherent(&pdev->dev,
3159 						  sizeof(mega_passthru),
3160 						  pthru, pthru_dma_hndl);
3161 
3162 				free_local_pdev(pdev);
3163 
3164 				return (-EFAULT);
3165 			}
3166 
3167 			/*
3168 			 * Is there a data transfer
3169 			 */
3170 			if( pthru->dataxferlen ) {
3171 				data = dma_alloc_coherent(&pdev->dev,
3172 							  pthru->dataxferlen,
3173 							  &data_dma_hndl,
3174 							  GFP_KERNEL);
3175 
3176 				if( data == NULL ) {
3177 					dma_free_coherent(&pdev->dev,
3178 							  sizeof(mega_passthru),
3179 							  pthru,
3180 							  pthru_dma_hndl);
3181 
3182 					free_local_pdev(pdev);
3183 
3184 					return (-ENOMEM);
3185 				}
3186 
3187 				/*
3188 				 * Save the user address and point the kernel
3189 				 * address at just allocated memory
3190 				 */
3191 				uxferaddr = pthru->dataxferaddr;
3192 				pthru->dataxferaddr = data_dma_hndl;
3193 			}
3194 
3195 
3196 			/*
3197 			 * Is data coming down-stream
3198 			 */
3199 			if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3200 				/*
3201 				 * Get the user data
3202 				 */
3203 				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3204 							pthru->dataxferlen) ) {
3205 					rval = (-EFAULT);
3206 					goto freemem_and_return;
3207 				}
3208 			}
3209 
3210 			memset(&mc, 0, sizeof(megacmd_t));
3211 
3212 			mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3213 			mc.xferaddr = (u32)pthru_dma_hndl;
3214 
3215 			/*
3216 			 * Issue the command
3217 			 */
3218 			mega_internal_command(adapter, &mc, pthru);
3219 
3220 			rval = mega_n_to_m((void __user *)arg, &mc);
3221 
3222 			if( rval ) goto freemem_and_return;
3223 
3224 
3225 			/*
3226 			 * Is data going up-stream
3227 			 */
3228 			if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3229 				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3230 							pthru->dataxferlen) ) {
3231 					rval = (-EFAULT);
3232 				}
3233 			}
3234 
3235 			/*
3236 			 * Send the request sense data also, irrespective of
3237 			 * whether the user has asked for it or not.
3238 			 */
3239 			if (copy_to_user(upthru->reqsensearea,
3240 					pthru->reqsensearea, 14))
3241 				rval = -EFAULT;
3242 
3243 freemem_and_return:
3244 			if( pthru->dataxferlen ) {
3245 				dma_free_coherent(&pdev->dev,
3246 						  pthru->dataxferlen, data,
3247 						  data_dma_hndl);
3248 			}
3249 
3250 			dma_free_coherent(&pdev->dev, sizeof(mega_passthru),
3251 					  pthru, pthru_dma_hndl);
3252 
3253 			free_local_pdev(pdev);
3254 
3255 			return rval;
3256 		}
3257 		else {
3258 			/* DCMD commands */
3259 
3260 			/*
3261 			 * Is there a data transfer
3262 			 */
3263 			if( uioc.xferlen ) {
3264 				data = dma_alloc_coherent(&pdev->dev,
3265 							  uioc.xferlen,
3266 							  &data_dma_hndl,
3267 							  GFP_KERNEL);
3268 
3269 				if( data == NULL ) {
3270 					free_local_pdev(pdev);
3271 					return (-ENOMEM);
3272 				}
3273 
3274 				uxferaddr = MBOX(uioc)->xferaddr;
3275 			}
3276 
3277 			/*
3278 			 * Is data coming down-stream
3279 			 */
3280 			if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3281 				/*
3282 				 * Get the user data
3283 				 */
3284 				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3285 							uioc.xferlen) ) {
3286 
3287 					dma_free_coherent(&pdev->dev,
3288 							  uioc.xferlen, data,
3289 							  data_dma_hndl);
3290 
3291 					free_local_pdev(pdev);
3292 
3293 					return (-EFAULT);
3294 				}
3295 			}
3296 
3297 			memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3298 
3299 			mc.xferaddr = (u32)data_dma_hndl;
3300 
3301 			/*
3302 			 * Issue the command
3303 			 */
3304 			mega_internal_command(adapter, &mc, NULL);
3305 
3306 			rval = mega_n_to_m((void __user *)arg, &mc);
3307 
3308 			if( rval ) {
3309 				if( uioc.xferlen ) {
3310 					dma_free_coherent(&pdev->dev,
3311 							  uioc.xferlen, data,
3312 							  data_dma_hndl);
3313 				}
3314 
3315 				free_local_pdev(pdev);
3316 
3317 				return rval;
3318 			}
3319 
3320 			/*
3321 			 * Is data going up-stream
3322 			 */
3323 			if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3324 				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3325 							uioc.xferlen) ) {
3326 
3327 					rval = (-EFAULT);
3328 				}
3329 			}
3330 
3331 			if( uioc.xferlen ) {
3332 				dma_free_coherent(&pdev->dev, uioc.xferlen,
3333 						  data, data_dma_hndl);
3334 			}
3335 
3336 			free_local_pdev(pdev);
3337 
3338 			return rval;
3339 		}
3340 
3341 	default:
3342 		return (-EINVAL);
3343 	}
3344 
3345 	return 0;
3346 }
3347 
3348 static long
megadev_unlocked_ioctl(struct file * filep,unsigned int cmd,unsigned long arg)3349 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3350 {
3351 	int ret;
3352 
3353 	mutex_lock(&megadev_mutex);
3354 	ret = megadev_ioctl(filep, cmd, arg);
3355 	mutex_unlock(&megadev_mutex);
3356 
3357 	return ret;
3358 }
3359 
3360 /**
3361  * mega_m_to_n()
3362  * @arg: user address
3363  * @uioc: new ioctl structure
3364  *
3365  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3366  * structure
3367  *
3368  * Converts the older mimd ioctl structure to newer NIT structure
3369  */
3370 static int
mega_m_to_n(void __user * arg,nitioctl_t * uioc)3371 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3372 {
3373 	struct uioctl_t	uioc_mimd;
3374 	char	signature[8] = {0};
3375 	u8	opcode;
3376 	u8	subopcode;
3377 
3378 
3379 	/*
3380 	 * check is the application conforms to NIT. We do not have to do much
3381 	 * in that case.
3382 	 * We exploit the fact that the signature is stored in the very
3383 	 * beginning of the structure.
3384 	 */
3385 
3386 	if( copy_from_user(signature, arg, 7) )
3387 		return (-EFAULT);
3388 
3389 	if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3390 
3391 		/*
3392 		 * NOTE NOTE: The nit ioctl is still under flux because of
3393 		 * change of mailbox definition, in HPE. No applications yet
3394 		 * use this interface and let's not have applications use this
3395 		 * interface till the new specifitions are in place.
3396 		 */
3397 		return -EINVAL;
3398 #if 0
3399 		if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3400 			return (-EFAULT);
3401 		return 0;
3402 #endif
3403 	}
3404 
3405 	/*
3406 	 * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3407 	 *
3408 	 * Get the user ioctl structure
3409 	 */
3410 	if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3411 		return (-EFAULT);
3412 
3413 
3414 	/*
3415 	 * Get the opcode and subopcode for the commands
3416 	 */
3417 	opcode = uioc_mimd.ui.fcs.opcode;
3418 	subopcode = uioc_mimd.ui.fcs.subopcode;
3419 
3420 	switch (opcode) {
3421 	case 0x82:
3422 
3423 		switch (subopcode) {
3424 
3425 		case MEGAIOC_QDRVRVER:	/* Query driver version */
3426 			uioc->opcode = GET_DRIVER_VER;
3427 			uioc->uioc_uaddr = uioc_mimd.data;
3428 			break;
3429 
3430 		case MEGAIOC_QNADAP:	/* Get # of adapters */
3431 			uioc->opcode = GET_N_ADAP;
3432 			uioc->uioc_uaddr = uioc_mimd.data;
3433 			break;
3434 
3435 		case MEGAIOC_QADAPINFO:	/* Get adapter information */
3436 			uioc->opcode = GET_ADAP_INFO;
3437 			uioc->adapno = uioc_mimd.ui.fcs.adapno;
3438 			uioc->uioc_uaddr = uioc_mimd.data;
3439 			break;
3440 
3441 		default:
3442 			return(-EINVAL);
3443 		}
3444 
3445 		break;
3446 
3447 
3448 	case 0x81:
3449 
3450 		uioc->opcode = MBOX_CMD;
3451 		uioc->adapno = uioc_mimd.ui.fcs.adapno;
3452 
3453 		memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3454 
3455 		uioc->xferlen = uioc_mimd.ui.fcs.length;
3456 
3457 		if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3458 		if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3459 
3460 		break;
3461 
3462 	case 0x80:
3463 
3464 		uioc->opcode = MBOX_CMD;
3465 		uioc->adapno = uioc_mimd.ui.fcs.adapno;
3466 
3467 		memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3468 
3469 		/*
3470 		 * Choose the xferlen bigger of input and output data
3471 		 */
3472 		uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3473 			uioc_mimd.outlen : uioc_mimd.inlen;
3474 
3475 		if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3476 		if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3477 
3478 		break;
3479 
3480 	default:
3481 		return (-EINVAL);
3482 
3483 	}
3484 
3485 	return 0;
3486 }
3487 
3488 /*
3489  * mega_n_to_m()
3490  * @arg: user address
3491  * @mc: mailbox command
3492  *
3493  * Updates the status information to the application, depending on application
3494  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3495  */
3496 static int
mega_n_to_m(void __user * arg,megacmd_t * mc)3497 mega_n_to_m(void __user *arg, megacmd_t *mc)
3498 {
3499 	nitioctl_t	__user *uiocp;
3500 	megacmd_t	__user *umc;
3501 	mega_passthru	__user *upthru;
3502 	struct uioctl_t	__user *uioc_mimd;
3503 	char	signature[8] = {0};
3504 
3505 	/*
3506 	 * check is the application conforms to NIT.
3507 	 */
3508 	if( copy_from_user(signature, arg, 7) )
3509 		return -EFAULT;
3510 
3511 	if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3512 
3513 		uiocp = arg;
3514 
3515 		if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3516 			return (-EFAULT);
3517 
3518 		if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3519 
3520 			umc = MBOX_P(uiocp);
3521 
3522 			if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3523 				return -EFAULT;
3524 
3525 			if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3526 				return (-EFAULT);
3527 		}
3528 	}
3529 	else {
3530 		uioc_mimd = arg;
3531 
3532 		if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3533 			return (-EFAULT);
3534 
3535 		if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3536 
3537 			umc = (megacmd_t __user *)uioc_mimd->mbox;
3538 
3539 			if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3540 				return (-EFAULT);
3541 
3542 			if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3543 				return (-EFAULT);
3544 		}
3545 	}
3546 
3547 	return 0;
3548 }
3549 
3550 
3551 /*
3552  * MEGARAID 'FW' commands.
3553  */
3554 
3555 /**
3556  * mega_is_bios_enabled()
3557  * @adapter: pointer to our soft state
3558  *
3559  * issue command to find out if the BIOS is enabled for this controller
3560  */
3561 static int
mega_is_bios_enabled(adapter_t * adapter)3562 mega_is_bios_enabled(adapter_t *adapter)
3563 {
3564 	struct mbox_out mbox;
3565 	unsigned char	*raw_mbox = (u8 *)&mbox;
3566 
3567 	memset(&mbox, 0, sizeof(mbox));
3568 
3569 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3570 
3571 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3572 
3573 	raw_mbox[0] = IS_BIOS_ENABLED;
3574 	raw_mbox[2] = GET_BIOS;
3575 
3576 	issue_scb_block(adapter, raw_mbox);
3577 
3578 	return *(char *)adapter->mega_buffer;
3579 }
3580 
3581 
3582 /**
3583  * mega_enum_raid_scsi()
3584  * @adapter: pointer to our soft state
3585  *
3586  * Find out what channels are RAID/SCSI. This information is used to
3587  * differentiate the virtual channels and physical channels and to support
3588  * ROMB feature and non-disk devices.
3589  */
3590 static void
mega_enum_raid_scsi(adapter_t * adapter)3591 mega_enum_raid_scsi(adapter_t *adapter)
3592 {
3593 	struct mbox_out mbox;
3594 	unsigned char	*raw_mbox = (u8 *)&mbox;
3595 	int i;
3596 
3597 	memset(&mbox, 0, sizeof(mbox));
3598 
3599 	/*
3600 	 * issue command to find out what channels are raid/scsi
3601 	 */
3602 	raw_mbox[0] = CHNL_CLASS;
3603 	raw_mbox[2] = GET_CHNL_CLASS;
3604 
3605 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3606 
3607 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3608 
3609 	/*
3610 	 * Non-ROMB firmware fail this command, so all channels
3611 	 * must be shown RAID
3612 	 */
3613 	adapter->mega_ch_class = 0xFF;
3614 
3615 	if(!issue_scb_block(adapter, raw_mbox)) {
3616 		adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3617 
3618 	}
3619 
3620 	for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3621 		if( (adapter->mega_ch_class >> i) & 0x01 ) {
3622 			dev_info(&adapter->dev->dev, "channel[%d] is raid\n",
3623 					i);
3624 		}
3625 		else {
3626 			dev_info(&adapter->dev->dev, "channel[%d] is scsi\n",
3627 					i);
3628 		}
3629 	}
3630 
3631 	return;
3632 }
3633 
3634 
3635 /**
3636  * mega_get_boot_drv()
3637  * @adapter: pointer to our soft state
3638  *
3639  * Find out which device is the boot device. Note, any logical drive or any
3640  * phyical device (e.g., a CDROM) can be designated as a boot device.
3641  */
3642 static void
mega_get_boot_drv(adapter_t * adapter)3643 mega_get_boot_drv(adapter_t *adapter)
3644 {
3645 	struct private_bios_data	*prv_bios_data;
3646 	struct mbox_out mbox;
3647 	unsigned char	*raw_mbox = (u8 *)&mbox;
3648 	u16	cksum = 0;
3649 	u8	*cksum_p;
3650 	u8	boot_pdrv;
3651 	int	i;
3652 
3653 	memset(&mbox, 0, sizeof(mbox));
3654 
3655 	raw_mbox[0] = BIOS_PVT_DATA;
3656 	raw_mbox[2] = GET_BIOS_PVT_DATA;
3657 
3658 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3659 
3660 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3661 
3662 	adapter->boot_ldrv_enabled = 0;
3663 	adapter->boot_ldrv = 0;
3664 
3665 	adapter->boot_pdrv_enabled = 0;
3666 	adapter->boot_pdrv_ch = 0;
3667 	adapter->boot_pdrv_tgt = 0;
3668 
3669 	if(issue_scb_block(adapter, raw_mbox) == 0) {
3670 		prv_bios_data =
3671 			(struct private_bios_data *)adapter->mega_buffer;
3672 
3673 		cksum = 0;
3674 		cksum_p = (char *)prv_bios_data;
3675 		for (i = 0; i < 14; i++ ) {
3676 			cksum += (u16)(*cksum_p++);
3677 		}
3678 
3679 		if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3680 
3681 			/*
3682 			 * If MSB is set, a physical drive is set as boot
3683 			 * device
3684 			 */
3685 			if( prv_bios_data->boot_drv & 0x80 ) {
3686 				adapter->boot_pdrv_enabled = 1;
3687 				boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3688 				adapter->boot_pdrv_ch = boot_pdrv / 16;
3689 				adapter->boot_pdrv_tgt = boot_pdrv % 16;
3690 			}
3691 			else {
3692 				adapter->boot_ldrv_enabled = 1;
3693 				adapter->boot_ldrv = prv_bios_data->boot_drv;
3694 			}
3695 		}
3696 	}
3697 
3698 }
3699 
3700 /**
3701  * mega_support_random_del()
3702  * @adapter: pointer to our soft state
3703  *
3704  * Find out if this controller supports random deletion and addition of
3705  * logical drives
3706  */
3707 static int
mega_support_random_del(adapter_t * adapter)3708 mega_support_random_del(adapter_t *adapter)
3709 {
3710 	struct mbox_out mbox;
3711 	unsigned char	*raw_mbox = (u8 *)&mbox;
3712 	int rval;
3713 
3714 	memset(&mbox, 0, sizeof(mbox));
3715 
3716 	/*
3717 	 * issue command
3718 	 */
3719 	raw_mbox[0] = FC_DEL_LOGDRV;
3720 	raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3721 
3722 	rval = issue_scb_block(adapter, raw_mbox);
3723 
3724 	return !rval;
3725 }
3726 
3727 
3728 /**
3729  * mega_support_ext_cdb()
3730  * @adapter: pointer to our soft state
3731  *
3732  * Find out if this firmware support cdblen > 10
3733  */
3734 static int
mega_support_ext_cdb(adapter_t * adapter)3735 mega_support_ext_cdb(adapter_t *adapter)
3736 {
3737 	struct mbox_out mbox;
3738 	unsigned char	*raw_mbox = (u8 *)&mbox;
3739 	int rval;
3740 
3741 	memset(&mbox, 0, sizeof(mbox));
3742 	/*
3743 	 * issue command to find out if controller supports extended CDBs.
3744 	 */
3745 	raw_mbox[0] = 0xA4;
3746 	raw_mbox[2] = 0x16;
3747 
3748 	rval = issue_scb_block(adapter, raw_mbox);
3749 
3750 	return !rval;
3751 }
3752 
3753 
3754 /**
3755  * mega_del_logdrv()
3756  * @adapter: pointer to our soft state
3757  * @logdrv: logical drive to be deleted
3758  *
3759  * Delete the specified logical drive. It is the responsibility of the user
3760  * app to let the OS know about this operation.
3761  */
3762 static int
mega_del_logdrv(adapter_t * adapter,int logdrv)3763 mega_del_logdrv(adapter_t *adapter, int logdrv)
3764 {
3765 	unsigned long flags;
3766 	scb_t *scb;
3767 	int rval;
3768 
3769 	/*
3770 	 * Stop sending commands to the controller, queue them internally.
3771 	 * When deletion is complete, ISR will flush the queue.
3772 	 */
3773 	atomic_set(&adapter->quiescent, 1);
3774 
3775 	/*
3776 	 * Wait till all the issued commands are complete and there are no
3777 	 * commands in the pending queue
3778 	 */
3779 	while (atomic_read(&adapter->pend_cmds) > 0 ||
3780 	       !list_empty(&adapter->pending_list))
3781 		msleep(1000);	/* sleep for 1s */
3782 
3783 	rval = mega_do_del_logdrv(adapter, logdrv);
3784 
3785 	spin_lock_irqsave(&adapter->lock, flags);
3786 
3787 	/*
3788 	 * If delete operation was successful, add 0x80 to the logical drive
3789 	 * ids for commands in the pending queue.
3790 	 */
3791 	if (adapter->read_ldidmap) {
3792 		struct list_head *pos;
3793 		list_for_each(pos, &adapter->pending_list) {
3794 			scb = list_entry(pos, scb_t, list);
3795 			if (scb->pthru->logdrv < 0x80 )
3796 				scb->pthru->logdrv += 0x80;
3797 		}
3798 	}
3799 
3800 	atomic_set(&adapter->quiescent, 0);
3801 
3802 	mega_runpendq(adapter);
3803 
3804 	spin_unlock_irqrestore(&adapter->lock, flags);
3805 
3806 	return rval;
3807 }
3808 
3809 
3810 static int
mega_do_del_logdrv(adapter_t * adapter,int logdrv)3811 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3812 {
3813 	megacmd_t	mc;
3814 	int	rval;
3815 
3816 	memset( &mc, 0, sizeof(megacmd_t));
3817 
3818 	mc.cmd = FC_DEL_LOGDRV;
3819 	mc.opcode = OP_DEL_LOGDRV;
3820 	mc.subopcode = logdrv;
3821 
3822 	rval = mega_internal_command(adapter, &mc, NULL);
3823 
3824 	/* log this event */
3825 	if(rval) {
3826 		dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv);
3827 		return rval;
3828 	}
3829 
3830 	/*
3831 	 * After deleting first logical drive, the logical drives must be
3832 	 * addressed by adding 0x80 to the logical drive id.
3833 	 */
3834 	adapter->read_ldidmap = 1;
3835 
3836 	return rval;
3837 }
3838 
3839 
3840 /**
3841  * mega_get_max_sgl()
3842  * @adapter: pointer to our soft state
3843  *
3844  * Find out the maximum number of scatter-gather elements supported by this
3845  * version of the firmware
3846  */
3847 static void
mega_get_max_sgl(adapter_t * adapter)3848 mega_get_max_sgl(adapter_t *adapter)
3849 {
3850 	struct mbox_out	mbox;
3851 	unsigned char	*raw_mbox = (u8 *)&mbox;
3852 
3853 	memset(&mbox, 0, sizeof(mbox));
3854 
3855 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3856 
3857 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3858 
3859 	raw_mbox[0] = MAIN_MISC_OPCODE;
3860 	raw_mbox[2] = GET_MAX_SG_SUPPORT;
3861 
3862 
3863 	if( issue_scb_block(adapter, raw_mbox) ) {
3864 		/*
3865 		 * f/w does not support this command. Choose the default value
3866 		 */
3867 		adapter->sglen = MIN_SGLIST;
3868 	}
3869 	else {
3870 		adapter->sglen = *((char *)adapter->mega_buffer);
3871 
3872 		/*
3873 		 * Make sure this is not more than the resources we are
3874 		 * planning to allocate
3875 		 */
3876 		if ( adapter->sglen > MAX_SGLIST )
3877 			adapter->sglen = MAX_SGLIST;
3878 	}
3879 
3880 	return;
3881 }
3882 
3883 
3884 /**
3885  * mega_support_cluster()
3886  * @adapter: pointer to our soft state
3887  *
3888  * Find out if this firmware support cluster calls.
3889  */
3890 static int
mega_support_cluster(adapter_t * adapter)3891 mega_support_cluster(adapter_t *adapter)
3892 {
3893 	struct mbox_out	mbox;
3894 	unsigned char	*raw_mbox = (u8 *)&mbox;
3895 
3896 	memset(&mbox, 0, sizeof(mbox));
3897 
3898 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3899 
3900 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3901 
3902 	/*
3903 	 * Try to get the initiator id. This command will succeed iff the
3904 	 * clustering is available on this HBA.
3905 	 */
3906 	raw_mbox[0] = MEGA_GET_TARGET_ID;
3907 
3908 	if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3909 
3910 		/*
3911 		 * Cluster support available. Get the initiator target id.
3912 		 * Tell our id to mid-layer too.
3913 		 */
3914 		adapter->this_id = *(u32 *)adapter->mega_buffer;
3915 		adapter->host->this_id = adapter->this_id;
3916 
3917 		return 1;
3918 	}
3919 
3920 	return 0;
3921 }
3922 
3923 #ifdef CONFIG_PROC_FS
3924 /**
3925  * mega_adapinq()
3926  * @adapter: pointer to our soft state
3927  * @dma_handle: DMA address of the buffer
3928  *
3929  * Issue internal commands while interrupts are available.
3930  * We only issue direct mailbox commands from within the driver. ioctl()
3931  * interface using these routines can issue passthru commands.
3932  */
3933 static int
mega_adapinq(adapter_t * adapter,dma_addr_t dma_handle)3934 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
3935 {
3936 	megacmd_t	mc;
3937 
3938 	memset(&mc, 0, sizeof(megacmd_t));
3939 
3940 	if( adapter->flag & BOARD_40LD ) {
3941 		mc.cmd = FC_NEW_CONFIG;
3942 		mc.opcode = NC_SUBOP_ENQUIRY3;
3943 		mc.subopcode = ENQ3_GET_SOLICITED_FULL;
3944 	}
3945 	else {
3946 		mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
3947 	}
3948 
3949 	mc.xferaddr = (u32)dma_handle;
3950 
3951 	if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
3952 		return -1;
3953 	}
3954 
3955 	return 0;
3956 }
3957 
3958 
3959 /**
3960  * mega_internal_dev_inquiry()
3961  * @adapter: pointer to our soft state
3962  * @ch: channel for this device
3963  * @tgt: ID of this device
3964  * @buf_dma_handle: DMA address of the buffer
3965  *
3966  * Issue the scsi inquiry for the specified device.
3967  */
3968 static int
mega_internal_dev_inquiry(adapter_t * adapter,u8 ch,u8 tgt,dma_addr_t buf_dma_handle)3969 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
3970 		dma_addr_t buf_dma_handle)
3971 {
3972 	mega_passthru	*pthru;
3973 	dma_addr_t	pthru_dma_handle;
3974 	megacmd_t	mc;
3975 	int		rval;
3976 	struct pci_dev	*pdev;
3977 
3978 
3979 	/*
3980 	 * For all internal commands, the buffer must be allocated in <4GB
3981 	 * address range
3982 	 */
3983 	if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
3984 
3985 	pthru = dma_alloc_coherent(&pdev->dev, sizeof(mega_passthru),
3986 				   &pthru_dma_handle, GFP_KERNEL);
3987 
3988 	if( pthru == NULL ) {
3989 		free_local_pdev(pdev);
3990 		return -1;
3991 	}
3992 
3993 	pthru->timeout = 2;
3994 	pthru->ars = 1;
3995 	pthru->reqsenselen = 14;
3996 	pthru->islogical = 0;
3997 
3998 	pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
3999 
4000 	pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4001 
4002 	pthru->cdblen = 6;
4003 
4004 	pthru->cdb[0] = INQUIRY;
4005 	pthru->cdb[1] = 0;
4006 	pthru->cdb[2] = 0;
4007 	pthru->cdb[3] = 0;
4008 	pthru->cdb[4] = 255;
4009 	pthru->cdb[5] = 0;
4010 
4011 
4012 	pthru->dataxferaddr = (u32)buf_dma_handle;
4013 	pthru->dataxferlen = 256;
4014 
4015 	memset(&mc, 0, sizeof(megacmd_t));
4016 
4017 	mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4018 	mc.xferaddr = (u32)pthru_dma_handle;
4019 
4020 	rval = mega_internal_command(adapter, &mc, pthru);
4021 
4022 	dma_free_coherent(&pdev->dev, sizeof(mega_passthru), pthru,
4023 			  pthru_dma_handle);
4024 
4025 	free_local_pdev(pdev);
4026 
4027 	return rval;
4028 }
4029 #endif
4030 
4031 /**
4032  * mega_internal_command()
4033  * @adapter: pointer to our soft state
4034  * @mc: the mailbox command
4035  * @pthru: Passthru structure for DCDB commands
4036  *
4037  * Issue the internal commands in interrupt mode.
4038  * The last argument is the address of the passthru structure if the command
4039  * to be fired is a passthru command
4040  *
4041  * Note: parameter 'pthru' is null for non-passthru commands.
4042  */
4043 static int
mega_internal_command(adapter_t * adapter,megacmd_t * mc,mega_passthru * pthru)4044 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4045 {
4046 	unsigned long flags;
4047 	scb_t	*scb;
4048 	int	rval;
4049 
4050 	/*
4051 	 * The internal commands share one command id and hence are
4052 	 * serialized. This is so because we want to reserve maximum number of
4053 	 * available command ids for the I/O commands.
4054 	 */
4055 	mutex_lock(&adapter->int_mtx);
4056 
4057 	scb = &adapter->int_scb;
4058 	memset(scb, 0, sizeof(scb_t));
4059 
4060 	scb->idx = CMDID_INT_CMDS;
4061 	scb->state |= SCB_ACTIVE | SCB_PENDQ;
4062 
4063 	memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4064 
4065 	/*
4066 	 * Is it a passthru command
4067 	 */
4068 	if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4069 		scb->pthru = pthru;
4070 
4071 	spin_lock_irqsave(&adapter->lock, flags);
4072 	list_add_tail(&scb->list, &adapter->pending_list);
4073 	/*
4074 	 * Check if the HBA is in quiescent state, e.g., during a
4075 	 * delete logical drive opertion. If it is, don't run
4076 	 * the pending_list.
4077 	 */
4078 	if (atomic_read(&adapter->quiescent) == 0)
4079 		mega_runpendq(adapter);
4080 	spin_unlock_irqrestore(&adapter->lock, flags);
4081 
4082 	wait_for_completion(&adapter->int_waitq);
4083 
4084 	mc->status = rval = adapter->int_status;
4085 
4086 	/*
4087 	 * Print a debug message for all failed commands. Applications can use
4088 	 * this information.
4089 	 */
4090 	if (rval && trace_level) {
4091 		dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n",
4092 			mc->cmd, mc->opcode, mc->subopcode, rval);
4093 	}
4094 
4095 	mutex_unlock(&adapter->int_mtx);
4096 	return rval;
4097 }
4098 
4099 static const struct scsi_host_template megaraid_template = {
4100 	.module				= THIS_MODULE,
4101 	.name				= "MegaRAID",
4102 	.proc_name			= "megaraid_legacy",
4103 	.info				= megaraid_info,
4104 	.queuecommand			= megaraid_queue,
4105 	.bios_param			= megaraid_biosparam,
4106 	.max_sectors			= MAX_SECTORS_PER_IO,
4107 	.can_queue			= MAX_COMMANDS,
4108 	.this_id			= DEFAULT_INITIATOR_ID,
4109 	.sg_tablesize			= MAX_SGLIST,
4110 	.cmd_per_lun			= DEF_CMD_PER_LUN,
4111 	.eh_abort_handler		= megaraid_abort,
4112 	.eh_host_reset_handler		= megaraid_reset,
4113 	.no_write_same			= 1,
4114 	.cmd_size			= sizeof(struct megaraid_cmd_priv),
4115 };
4116 
4117 static int
megaraid_probe_one(struct pci_dev * pdev,const struct pci_device_id * id)4118 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4119 {
4120 	struct Scsi_Host *host;
4121 	adapter_t *adapter;
4122 	unsigned long mega_baseport, tbase, flag = 0;
4123 	u16 subsysid, subsysvid;
4124 	u8 pci_bus, pci_dev_func;
4125 	int irq, i, j;
4126 	int error = -ENODEV;
4127 
4128 	if (hba_count >= MAX_CONTROLLERS)
4129 		goto out;
4130 
4131 	if (pci_enable_device(pdev))
4132 		goto out;
4133 	pci_set_master(pdev);
4134 
4135 	pci_bus = pdev->bus->number;
4136 	pci_dev_func = pdev->devfn;
4137 
4138 	/*
4139 	 * The megaraid3 stuff reports the ID of the Intel part which is not
4140 	 * remotely specific to the megaraid
4141 	 */
4142 	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4143 		u16 magic;
4144 		/*
4145 		 * Don't fall over the Compaq management cards using the same
4146 		 * PCI identifier
4147 		 */
4148 		if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4149 		    pdev->subsystem_device == 0xC000)
4150 			goto out_disable_device;
4151 		/* Now check the magic signature byte */
4152 		pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4153 		if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4154 			goto out_disable_device;
4155 		/* Ok it is probably a megaraid */
4156 	}
4157 
4158 	/*
4159 	 * For these vendor and device ids, signature offsets are not
4160 	 * valid and 64 bit is implicit
4161 	 */
4162 	if (id->driver_data & BOARD_64BIT)
4163 		flag |= BOARD_64BIT;
4164 	else {
4165 		u32 magic64;
4166 
4167 		pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4168 		if (magic64 == HBA_SIGNATURE_64BIT)
4169 			flag |= BOARD_64BIT;
4170 	}
4171 
4172 	subsysvid = pdev->subsystem_vendor;
4173 	subsysid = pdev->subsystem_device;
4174 
4175 	dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n",
4176 		id->vendor, id->device);
4177 
4178 	/* Read the base port and IRQ from PCI */
4179 	mega_baseport = pci_resource_start(pdev, 0);
4180 	irq = pdev->irq;
4181 
4182 	tbase = mega_baseport;
4183 	if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4184 		flag |= BOARD_MEMMAP;
4185 
4186 		if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4187 			dev_warn(&pdev->dev, "mem region busy!\n");
4188 			goto out_disable_device;
4189 		}
4190 
4191 		mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4192 		if (!mega_baseport) {
4193 			dev_warn(&pdev->dev, "could not map hba memory\n");
4194 			goto out_release_region;
4195 		}
4196 	} else {
4197 		flag |= BOARD_IOMAP;
4198 		mega_baseport += 0x10;
4199 
4200 		if (!request_region(mega_baseport, 16, "megaraid"))
4201 			goto out_disable_device;
4202 	}
4203 
4204 	/* Initialize SCSI Host structure */
4205 	host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4206 	if (!host)
4207 		goto out_iounmap;
4208 
4209 	adapter = (adapter_t *)host->hostdata;
4210 	memset(adapter, 0, sizeof(adapter_t));
4211 
4212 	dev_notice(&pdev->dev,
4213 		"scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4214 		host->host_no, mega_baseport, irq);
4215 
4216 	adapter->base = mega_baseport;
4217 	if (flag & BOARD_MEMMAP)
4218 		adapter->mmio_base = (void __iomem *) mega_baseport;
4219 
4220 	INIT_LIST_HEAD(&adapter->free_list);
4221 	INIT_LIST_HEAD(&adapter->pending_list);
4222 	INIT_LIST_HEAD(&adapter->completed_list);
4223 
4224 	adapter->flag = flag;
4225 	spin_lock_init(&adapter->lock);
4226 
4227 	host->cmd_per_lun = max_cmd_per_lun;
4228 	host->max_sectors = max_sectors_per_io;
4229 
4230 	adapter->dev = pdev;
4231 	adapter->host = host;
4232 
4233 	adapter->host->irq = irq;
4234 
4235 	if (flag & BOARD_MEMMAP)
4236 		adapter->host->base = tbase;
4237 	else {
4238 		adapter->host->io_port = tbase;
4239 		adapter->host->n_io_port = 16;
4240 	}
4241 
4242 	adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4243 
4244 	/*
4245 	 * Allocate buffer to issue internal commands.
4246 	 */
4247 	adapter->mega_buffer = dma_alloc_coherent(&adapter->dev->dev,
4248 						  MEGA_BUFFER_SIZE,
4249 						  &adapter->buf_dma_handle,
4250 						  GFP_KERNEL);
4251 	if (!adapter->mega_buffer) {
4252 		dev_warn(&pdev->dev, "out of RAM\n");
4253 		goto out_host_put;
4254 	}
4255 
4256 	adapter->scb_list = kmalloc_array(MAX_COMMANDS, sizeof(scb_t),
4257 					  GFP_KERNEL);
4258 	if (!adapter->scb_list) {
4259 		dev_warn(&pdev->dev, "out of RAM\n");
4260 		goto out_free_cmd_buffer;
4261 	}
4262 
4263 	if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4264 				megaraid_isr_memmapped : megaraid_isr_iomapped,
4265 					IRQF_SHARED, "megaraid", adapter)) {
4266 		dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq);
4267 		goto out_free_scb_list;
4268 	}
4269 
4270 	if (mega_setup_mailbox(adapter))
4271 		goto out_free_irq;
4272 
4273 	if (mega_query_adapter(adapter))
4274 		goto out_free_mbox;
4275 
4276 	/*
4277 	 * Have checks for some buggy f/w
4278 	 */
4279 	if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4280 		/*
4281 		 * Which firmware
4282 		 */
4283 		if (!strcmp(adapter->fw_version, "3.00") ||
4284 				!strcmp(adapter->fw_version, "3.01")) {
4285 
4286 			dev_warn(&pdev->dev,
4287 				"Your card is a Dell PERC "
4288 				"2/SC RAID controller with "
4289 				"firmware\nmegaraid: 3.00 or 3.01.  "
4290 				"This driver is known to have "
4291 				"corruption issues\nmegaraid: with "
4292 				"those firmware versions on this "
4293 				"specific card.  In order\nmegaraid: "
4294 				"to protect your data, please upgrade "
4295 				"your firmware to version\nmegaraid: "
4296 				"3.10 or later, available from the "
4297 				"Dell Technical Support web\n"
4298 				"megaraid: site at\nhttp://support."
4299 				"dell.com/us/en/filelib/download/"
4300 				"index.asp?fileid=2940\n"
4301 			);
4302 		}
4303 	}
4304 
4305 	/*
4306 	 * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4307 	 * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4308 	 * support, since this firmware cannot handle 64 bit
4309 	 * addressing
4310 	 */
4311 	if ((subsysvid == PCI_VENDOR_ID_HP) &&
4312 	    ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4313 		/*
4314 		 * which firmware
4315 		 */
4316 		if (!strcmp(adapter->fw_version, "H01.07") ||
4317 		    !strcmp(adapter->fw_version, "H01.08") ||
4318 		    !strcmp(adapter->fw_version, "H01.09") ) {
4319 			dev_warn(&pdev->dev,
4320 				"Firmware H.01.07, "
4321 				"H.01.08, and H.01.09 on 1M/2M "
4322 				"controllers\n"
4323 				"do not support 64 bit "
4324 				"addressing.\nDISABLING "
4325 				"64 bit support.\n");
4326 			adapter->flag &= ~BOARD_64BIT;
4327 		}
4328 	}
4329 
4330 	if (mega_is_bios_enabled(adapter))
4331 		mega_hbas[hba_count].is_bios_enabled = 1;
4332 	mega_hbas[hba_count].hostdata_addr = adapter;
4333 
4334 	/*
4335 	 * Find out which channel is raid and which is scsi. This is
4336 	 * for ROMB support.
4337 	 */
4338 	mega_enum_raid_scsi(adapter);
4339 
4340 	/*
4341 	 * Find out if a logical drive is set as the boot drive. If
4342 	 * there is one, will make that as the first logical drive.
4343 	 * ROMB: Do we have to boot from a physical drive. Then all
4344 	 * the physical drives would appear before the logical disks.
4345 	 * Else, all the physical drives would be exported to the mid
4346 	 * layer after logical drives.
4347 	 */
4348 	mega_get_boot_drv(adapter);
4349 
4350 	if (adapter->boot_pdrv_enabled) {
4351 		j = adapter->product_info.nchannels;
4352 		for( i = 0; i < j; i++ )
4353 			adapter->logdrv_chan[i] = 0;
4354 		for( i = j; i < NVIRT_CHAN + j; i++ )
4355 			adapter->logdrv_chan[i] = 1;
4356 	} else {
4357 		for (i = 0; i < NVIRT_CHAN; i++)
4358 			adapter->logdrv_chan[i] = 1;
4359 		for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4360 			adapter->logdrv_chan[i] = 0;
4361 		adapter->mega_ch_class <<= NVIRT_CHAN;
4362 	}
4363 
4364 	/*
4365 	 * Do we support random deletion and addition of logical
4366 	 * drives
4367 	 */
4368 	adapter->read_ldidmap = 0;	/* set it after first logdrv
4369 						   delete cmd */
4370 	adapter->support_random_del = mega_support_random_del(adapter);
4371 
4372 	/* Initialize SCBs */
4373 	if (mega_init_scb(adapter))
4374 		goto out_free_mbox;
4375 
4376 	/*
4377 	 * Reset the pending commands counter
4378 	 */
4379 	atomic_set(&adapter->pend_cmds, 0);
4380 
4381 	/*
4382 	 * Reset the adapter quiescent flag
4383 	 */
4384 	atomic_set(&adapter->quiescent, 0);
4385 
4386 	hba_soft_state[hba_count] = adapter;
4387 
4388 	/*
4389 	 * Fill in the structure which needs to be passed back to the
4390 	 * application when it does an ioctl() for controller related
4391 	 * information.
4392 	 */
4393 	i = hba_count;
4394 
4395 	mcontroller[i].base = mega_baseport;
4396 	mcontroller[i].irq = irq;
4397 	mcontroller[i].numldrv = adapter->numldrv;
4398 	mcontroller[i].pcibus = pci_bus;
4399 	mcontroller[i].pcidev = id->device;
4400 	mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4401 	mcontroller[i].pciid = -1;
4402 	mcontroller[i].pcivendor = id->vendor;
4403 	mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4404 	mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4405 
4406 
4407 	/* Set the Mode of addressing to 64 bit if we can */
4408 	if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4409 		dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
4410 		adapter->has_64bit_addr = 1;
4411 	} else  {
4412 		dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
4413 		adapter->has_64bit_addr = 0;
4414 	}
4415 
4416 	mutex_init(&adapter->int_mtx);
4417 	init_completion(&adapter->int_waitq);
4418 
4419 	adapter->this_id = DEFAULT_INITIATOR_ID;
4420 	adapter->host->this_id = DEFAULT_INITIATOR_ID;
4421 
4422 #if MEGA_HAVE_CLUSTERING
4423 	/*
4424 	 * Is cluster support enabled on this controller
4425 	 * Note: In a cluster the HBAs ( the initiators ) will have
4426 	 * different target IDs and we cannot assume it to be 7. Call
4427 	 * to mega_support_cluster() will get the target ids also if
4428 	 * the cluster support is available
4429 	 */
4430 	adapter->has_cluster = mega_support_cluster(adapter);
4431 	if (adapter->has_cluster) {
4432 		dev_notice(&pdev->dev,
4433 			"Cluster driver, initiator id:%d\n",
4434 			adapter->this_id);
4435 	}
4436 #endif
4437 
4438 	pci_set_drvdata(pdev, host);
4439 
4440 	mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4441 
4442 	error = scsi_add_host(host, &pdev->dev);
4443 	if (error)
4444 		goto out_free_mbox;
4445 
4446 	scsi_scan_host(host);
4447 	hba_count++;
4448 	return 0;
4449 
4450  out_free_mbox:
4451 	dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4452 			  adapter->una_mbox64, adapter->una_mbox64_dma);
4453  out_free_irq:
4454 	free_irq(adapter->host->irq, adapter);
4455  out_free_scb_list:
4456 	kfree(adapter->scb_list);
4457  out_free_cmd_buffer:
4458 	dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4459 			  adapter->mega_buffer, adapter->buf_dma_handle);
4460  out_host_put:
4461 	scsi_host_put(host);
4462  out_iounmap:
4463 	if (flag & BOARD_MEMMAP)
4464 		iounmap((void *)mega_baseport);
4465  out_release_region:
4466 	if (flag & BOARD_MEMMAP)
4467 		release_mem_region(tbase, 128);
4468 	else
4469 		release_region(mega_baseport, 16);
4470  out_disable_device:
4471 	pci_disable_device(pdev);
4472  out:
4473 	return error;
4474 }
4475 
4476 static void
__megaraid_shutdown(adapter_t * adapter)4477 __megaraid_shutdown(adapter_t *adapter)
4478 {
4479 	u_char	raw_mbox[sizeof(struct mbox_out)];
4480 	mbox_t	*mbox = (mbox_t *)raw_mbox;
4481 	int	i;
4482 
4483 	/* Flush adapter cache */
4484 	memset(&mbox->m_out, 0, sizeof(raw_mbox));
4485 	raw_mbox[0] = FLUSH_ADAPTER;
4486 
4487 	free_irq(adapter->host->irq, adapter);
4488 
4489 	/* Issue a blocking (interrupts disabled) command to the card */
4490 	issue_scb_block(adapter, raw_mbox);
4491 
4492 	/* Flush disks cache */
4493 	memset(&mbox->m_out, 0, sizeof(raw_mbox));
4494 	raw_mbox[0] = FLUSH_SYSTEM;
4495 
4496 	/* Issue a blocking (interrupts disabled) command to the card */
4497 	issue_scb_block(adapter, raw_mbox);
4498 
4499 	if (atomic_read(&adapter->pend_cmds) > 0)
4500 		dev_warn(&adapter->dev->dev, "pending commands!!\n");
4501 
4502 	/*
4503 	 * Have a delibrate delay to make sure all the caches are
4504 	 * actually flushed.
4505 	 */
4506 	for (i = 0; i <= 10; i++)
4507 		mdelay(1000);
4508 }
4509 
4510 static void
megaraid_remove_one(struct pci_dev * pdev)4511 megaraid_remove_one(struct pci_dev *pdev)
4512 {
4513 	struct Scsi_Host *host = pci_get_drvdata(pdev);
4514 	adapter_t *adapter = (adapter_t *)host->hostdata;
4515 	char buf[12] = { 0 };
4516 
4517 	scsi_remove_host(host);
4518 
4519 	__megaraid_shutdown(adapter);
4520 
4521 	/* Free our resources */
4522 	if (adapter->flag & BOARD_MEMMAP) {
4523 		iounmap((void *)adapter->base);
4524 		release_mem_region(adapter->host->base, 128);
4525 	} else
4526 		release_region(adapter->base, 16);
4527 
4528 	mega_free_sgl(adapter);
4529 
4530 	sprintf(buf, "hba%d", adapter->host->host_no);
4531 	remove_proc_subtree(buf, mega_proc_dir_entry);
4532 
4533 	dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4534 			  adapter->mega_buffer, adapter->buf_dma_handle);
4535 	kfree(adapter->scb_list);
4536 	dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4537 			  adapter->una_mbox64, adapter->una_mbox64_dma);
4538 
4539 	scsi_host_put(host);
4540 	pci_disable_device(pdev);
4541 
4542 	hba_count--;
4543 }
4544 
4545 static void
megaraid_shutdown(struct pci_dev * pdev)4546 megaraid_shutdown(struct pci_dev *pdev)
4547 {
4548 	struct Scsi_Host *host = pci_get_drvdata(pdev);
4549 	adapter_t *adapter = (adapter_t *)host->hostdata;
4550 
4551 	__megaraid_shutdown(adapter);
4552 }
4553 
4554 static struct pci_device_id megaraid_pci_tbl[] = {
4555 	{PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4556 		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4557 	{PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4558 		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4559 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4560 		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4561 	{0,}
4562 };
4563 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4564 
4565 static struct pci_driver megaraid_pci_driver = {
4566 	.name		= "megaraid_legacy",
4567 	.id_table	= megaraid_pci_tbl,
4568 	.probe		= megaraid_probe_one,
4569 	.remove		= megaraid_remove_one,
4570 	.shutdown	= megaraid_shutdown,
4571 };
4572 
megaraid_init(void)4573 static int __init megaraid_init(void)
4574 {
4575 	int error;
4576 
4577 	if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4578 		max_cmd_per_lun = MAX_CMD_PER_LUN;
4579 	if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4580 		max_mbox_busy_wait = MBOX_BUSY_WAIT;
4581 
4582 #ifdef CONFIG_PROC_FS
4583 	mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4584 	if (!mega_proc_dir_entry) {
4585 		printk(KERN_WARNING
4586 				"megaraid: failed to create megaraid root\n");
4587 	}
4588 #endif
4589 	error = pci_register_driver(&megaraid_pci_driver);
4590 	if (error) {
4591 #ifdef CONFIG_PROC_FS
4592 		remove_proc_entry("megaraid", NULL);
4593 #endif
4594 		return error;
4595 	}
4596 
4597 	/*
4598 	 * Register the driver as a character device, for applications
4599 	 * to access it for ioctls.
4600 	 * First argument (major) to register_chrdev implies a dynamic
4601 	 * major number allocation.
4602 	 */
4603 	major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4604 	if (major < 0) {
4605 		printk(KERN_WARNING
4606 				"megaraid: failed to register char device\n");
4607 	}
4608 
4609 	return 0;
4610 }
4611 
megaraid_exit(void)4612 static void __exit megaraid_exit(void)
4613 {
4614 	/*
4615 	 * Unregister the character device interface to the driver.
4616 	 */
4617 	unregister_chrdev(major, "megadev_legacy");
4618 
4619 	pci_unregister_driver(&megaraid_pci_driver);
4620 
4621 #ifdef CONFIG_PROC_FS
4622 	remove_proc_entry("megaraid", NULL);
4623 #endif
4624 }
4625 
4626 module_init(megaraid_init);
4627 module_exit(megaraid_exit);
4628 
4629 /* vi: set ts=8 sw=8 tw=78: */
4630