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 ((retval = 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 
1445 			list_del_init(&scb->list);
1446 			scb->state = SCB_FREE;
1447 
1448 			adapter->int_status = status;
1449 			complete(&adapter->int_waitq);
1450 		} else {
1451 			scb = &adapter->scb_list[cmdid];
1452 
1453 			/*
1454 			 * Make sure f/w has completed a valid command
1455 			 */
1456 			if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1457 				dev_crit(&adapter->dev->dev, "invalid command "
1458 					"Id %d, scb->state:%x, scsi cmd:%p\n",
1459 					cmdid, scb->state, scb->cmd);
1460 
1461 				continue;
1462 			}
1463 
1464 			/*
1465 			 * Was a abort issued for this command
1466 			 */
1467 			if( scb->state & SCB_ABORT ) {
1468 
1469 				dev_warn(&adapter->dev->dev,
1470 					"aborted cmd [%x] complete\n",
1471 					scb->idx);
1472 
1473 				scb->cmd->result = (DID_ABORT << 16);
1474 
1475 				list_add_tail(SCSI_LIST(scb->cmd),
1476 						&adapter->completed_list);
1477 
1478 				mega_free_scb(adapter, scb);
1479 
1480 				continue;
1481 			}
1482 
1483 			/*
1484 			 * Was a reset issued for this command
1485 			 */
1486 			if( scb->state & SCB_RESET ) {
1487 
1488 				dev_warn(&adapter->dev->dev,
1489 					"reset cmd [%x] complete\n",
1490 					scb->idx);
1491 
1492 				scb->cmd->result = (DID_RESET << 16);
1493 
1494 				list_add_tail(SCSI_LIST(scb->cmd),
1495 						&adapter->completed_list);
1496 
1497 				mega_free_scb (adapter, scb);
1498 
1499 				continue;
1500 			}
1501 
1502 			cmd = scb->cmd;
1503 			pthru = scb->pthru;
1504 			epthru = scb->epthru;
1505 			mbox = (mbox_t *)scb->raw_mbox;
1506 
1507 #if MEGA_HAVE_STATS
1508 			{
1509 
1510 			int	logdrv = mbox->m_out.logdrv;
1511 
1512 			islogical = adapter->logdrv_chan[cmd->channel];
1513 			/*
1514 			 * Maintain an error counter for the logical drive.
1515 			 * Some application like SNMP agent need such
1516 			 * statistics
1517 			 */
1518 			if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1519 						cmd->cmnd[0] == READ_10 ||
1520 						cmd->cmnd[0] == READ_12)) {
1521 				/*
1522 				 * Logical drive number increases by 0x80 when
1523 				 * a logical drive is deleted
1524 				 */
1525 				adapter->rd_errors[logdrv%0x80]++;
1526 			}
1527 
1528 			if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1529 						cmd->cmnd[0] == WRITE_10 ||
1530 						cmd->cmnd[0] == WRITE_12)) {
1531 				/*
1532 				 * Logical drive number increases by 0x80 when
1533 				 * a logical drive is deleted
1534 				 */
1535 				adapter->wr_errors[logdrv%0x80]++;
1536 			}
1537 
1538 			}
1539 #endif
1540 		}
1541 
1542 		/*
1543 		 * Do not return the presence of hard disk on the channel so,
1544 		 * inquiry sent, and returned data==hard disk or removable
1545 		 * hard disk and not logical, request should return failure! -
1546 		 * PJ
1547 		 */
1548 		islogical = adapter->logdrv_chan[cmd->device->channel];
1549 		if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1550 
1551 			sgl = scsi_sglist(cmd);
1552 			if( sg_page(sgl) ) {
1553 				c = *(unsigned char *) sg_virt(&sgl[0]);
1554 			} else {
1555 				dev_warn(&adapter->dev->dev, "invalid sg\n");
1556 				c = 0;
1557 			}
1558 
1559 			if(IS_RAID_CH(adapter, cmd->device->channel) &&
1560 					((c & 0x1F ) == TYPE_DISK)) {
1561 				status = 0xF0;
1562 			}
1563 		}
1564 
1565 		/* clear result; otherwise, success returns corrupt value */
1566 		cmd->result = 0;
1567 
1568 		/* Convert MegaRAID status to Linux error code */
1569 		switch (status) {
1570 		case 0x00:	/* SUCCESS , i.e. SCSI_STATUS_GOOD */
1571 			cmd->result |= (DID_OK << 16);
1572 			break;
1573 
1574 		case 0x02:	/* ERROR_ABORTED, i.e.
1575 				   SCSI_STATUS_CHECK_CONDITION */
1576 
1577 			/* set sense_buffer and result fields */
1578 			if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1579 				mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1580 
1581 				memcpy(cmd->sense_buffer, pthru->reqsensearea,
1582 						14);
1583 
1584 				cmd->result = SAM_STAT_CHECK_CONDITION;
1585 			}
1586 			else {
1587 				if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1588 
1589 					memcpy(cmd->sense_buffer,
1590 						epthru->reqsensearea, 14);
1591 
1592 					cmd->result = SAM_STAT_CHECK_CONDITION;
1593 				} else
1594 					scsi_build_sense(cmd, 0,
1595 							 ABORTED_COMMAND, 0, 0);
1596 			}
1597 			break;
1598 
1599 		case 0x08:	/* ERR_DEST_DRIVE_FAILED, i.e.
1600 				   SCSI_STATUS_BUSY */
1601 			cmd->result |= (DID_BUS_BUSY << 16) | status;
1602 			break;
1603 
1604 		default:
1605 #if MEGA_HAVE_CLUSTERING
1606 			/*
1607 			 * If TEST_UNIT_READY fails, we know
1608 			 * MEGA_RESERVATION_STATUS failed
1609 			 */
1610 			if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1611 				cmd->result |= (DID_ERROR << 16) |
1612 					SAM_STAT_RESERVATION_CONFLICT;
1613 			}
1614 			else
1615 			/*
1616 			 * Error code returned is 1 if Reserve or Release
1617 			 * failed or the input parameter is invalid
1618 			 */
1619 			if( status == 1 &&
1620 				(cmd->cmnd[0] == RESERVE ||
1621 					 cmd->cmnd[0] == RELEASE) ) {
1622 
1623 				cmd->result |= (DID_ERROR << 16) |
1624 					SAM_STAT_RESERVATION_CONFLICT;
1625 			}
1626 			else
1627 #endif
1628 				cmd->result |= (DID_BAD_TARGET << 16)|status;
1629 		}
1630 
1631 		mega_free_scb(adapter, scb);
1632 
1633 		/* Add Scsi_Command to end of completed queue */
1634 		list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1635 	}
1636 }
1637 
1638 
1639 /*
1640  * mega_runpendq()
1641  *
1642  * Run through the list of completed requests and finish it
1643  */
1644 static void
mega_rundoneq(adapter_t * adapter)1645 mega_rundoneq (adapter_t *adapter)
1646 {
1647 	struct megaraid_cmd_priv *cmd_priv;
1648 
1649 	list_for_each_entry(cmd_priv, &adapter->completed_list, entry)
1650 		scsi_done(megaraid_to_scsi_cmd(cmd_priv));
1651 
1652 	INIT_LIST_HEAD(&adapter->completed_list);
1653 }
1654 
1655 
1656 /*
1657  * Free a SCB structure
1658  * Note: We assume the scsi commands associated with this scb is not free yet.
1659  */
1660 static void
mega_free_scb(adapter_t * adapter,scb_t * scb)1661 mega_free_scb(adapter_t *adapter, scb_t *scb)
1662 {
1663 	switch( scb->dma_type ) {
1664 
1665 	case MEGA_DMA_TYPE_NONE:
1666 		break;
1667 
1668 	case MEGA_SGLIST:
1669 		scsi_dma_unmap(scb->cmd);
1670 		break;
1671 	default:
1672 		break;
1673 	}
1674 
1675 	/*
1676 	 * Remove from the pending list
1677 	 */
1678 	list_del_init(&scb->list);
1679 
1680 	/* Link the scb back into free list */
1681 	scb->state = SCB_FREE;
1682 	scb->cmd = NULL;
1683 
1684 	list_add(&scb->list, &adapter->free_list);
1685 }
1686 
1687 
1688 static int
__mega_busywait_mbox(adapter_t * adapter)1689 __mega_busywait_mbox (adapter_t *adapter)
1690 {
1691 	volatile mbox_t *mbox = adapter->mbox;
1692 	long counter;
1693 
1694 	for (counter = 0; counter < 10000; counter++) {
1695 		if (!mbox->m_in.busy)
1696 			return 0;
1697 		udelay(100);
1698 		cond_resched();
1699 	}
1700 	return -1;		/* give up after 1 second */
1701 }
1702 
1703 /*
1704  * Copies data to SGLIST
1705  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1706  */
1707 static int
mega_build_sglist(adapter_t * adapter,scb_t * scb,u32 * buf,u32 * len)1708 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1709 {
1710 	struct scatterlist *sg;
1711 	struct scsi_cmnd	*cmd;
1712 	int	sgcnt;
1713 	int	idx;
1714 
1715 	cmd = scb->cmd;
1716 
1717 	/*
1718 	 * Copy Scatter-Gather list info into controller structure.
1719 	 *
1720 	 * The number of sg elements returned must not exceed our limit
1721 	 */
1722 	sgcnt = scsi_dma_map(cmd);
1723 
1724 	scb->dma_type = MEGA_SGLIST;
1725 
1726 	BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1727 
1728 	*len = 0;
1729 
1730 	if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1731 		sg = scsi_sglist(cmd);
1732 		scb->dma_h_bulkdata = sg_dma_address(sg);
1733 		*buf = (u32)scb->dma_h_bulkdata;
1734 		*len = sg_dma_len(sg);
1735 		return 0;
1736 	}
1737 
1738 	scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1739 		if (adapter->has_64bit_addr) {
1740 			scb->sgl64[idx].address = sg_dma_address(sg);
1741 			*len += scb->sgl64[idx].length = sg_dma_len(sg);
1742 		} else {
1743 			scb->sgl[idx].address = sg_dma_address(sg);
1744 			*len += scb->sgl[idx].length = sg_dma_len(sg);
1745 		}
1746 	}
1747 
1748 	/* Reset pointer and length fields */
1749 	*buf = scb->sgl_dma_addr;
1750 
1751 	/* Return count of SG requests */
1752 	return sgcnt;
1753 }
1754 
1755 
1756 /*
1757  * mega_8_to_40ld()
1758  *
1759  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1760  * Enquiry3 structures for later use
1761  */
1762 static void
mega_8_to_40ld(mraid_inquiry * inquiry,mega_inquiry3 * enquiry3,mega_product_info * product_info)1763 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1764 		mega_product_info *product_info)
1765 {
1766 	int i;
1767 
1768 	product_info->max_commands = inquiry->adapter_info.max_commands;
1769 	enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1770 	product_info->nchannels = inquiry->adapter_info.nchannels;
1771 
1772 	for (i = 0; i < 4; i++) {
1773 		product_info->fw_version[i] =
1774 			inquiry->adapter_info.fw_version[i];
1775 
1776 		product_info->bios_version[i] =
1777 			inquiry->adapter_info.bios_version[i];
1778 	}
1779 	enquiry3->cache_flush_interval =
1780 		inquiry->adapter_info.cache_flush_interval;
1781 
1782 	product_info->dram_size = inquiry->adapter_info.dram_size;
1783 
1784 	enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1785 
1786 	for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1787 		enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1788 		enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1789 		enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1790 	}
1791 
1792 	for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1793 		enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1794 }
1795 
1796 static inline void
mega_free_sgl(adapter_t * adapter)1797 mega_free_sgl(adapter_t *adapter)
1798 {
1799 	scb_t	*scb;
1800 	int	i;
1801 
1802 	for(i = 0; i < adapter->max_cmds; i++) {
1803 
1804 		scb = &adapter->scb_list[i];
1805 
1806 		if( scb->sgl64 ) {
1807 			dma_free_coherent(&adapter->dev->dev,
1808 					  sizeof(mega_sgl64) * adapter->sglen,
1809 					  scb->sgl64, scb->sgl_dma_addr);
1810 
1811 			scb->sgl64 = NULL;
1812 		}
1813 
1814 		if( scb->pthru ) {
1815 			dma_free_coherent(&adapter->dev->dev,
1816 					  sizeof(mega_passthru), scb->pthru,
1817 					  scb->pthru_dma_addr);
1818 
1819 			scb->pthru = NULL;
1820 		}
1821 
1822 		if( scb->epthru ) {
1823 			dma_free_coherent(&adapter->dev->dev,
1824 					  sizeof(mega_ext_passthru),
1825 					  scb->epthru, scb->epthru_dma_addr);
1826 
1827 			scb->epthru = NULL;
1828 		}
1829 
1830 	}
1831 }
1832 
1833 
1834 /*
1835  * Get information about the card/driver
1836  */
1837 const char *
megaraid_info(struct Scsi_Host * host)1838 megaraid_info(struct Scsi_Host *host)
1839 {
1840 	static char buffer[512];
1841 	adapter_t *adapter;
1842 
1843 	adapter = (adapter_t *)host->hostdata;
1844 
1845 	sprintf (buffer,
1846 		 "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1847 		 adapter->fw_version, adapter->product_info.max_commands,
1848 		 adapter->host->max_id, adapter->host->max_channel,
1849 		 (u32)adapter->host->max_lun);
1850 	return buffer;
1851 }
1852 
1853 /*
1854  * Abort a previous SCSI request. Only commands on the pending list can be
1855  * aborted. All the commands issued to the F/W must complete.
1856  */
1857 static int
megaraid_abort(struct scsi_cmnd * cmd)1858 megaraid_abort(struct scsi_cmnd *cmd)
1859 {
1860 	adapter_t	*adapter;
1861 	int		rval;
1862 
1863 	adapter = (adapter_t *)cmd->device->host->hostdata;
1864 
1865 	rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1866 
1867 	/*
1868 	 * This is required here to complete any completed requests
1869 	 * to be communicated over to the mid layer.
1870 	 */
1871 	mega_rundoneq(adapter);
1872 
1873 	return rval;
1874 }
1875 
1876 
1877 static int
megaraid_reset(struct scsi_cmnd * cmd)1878 megaraid_reset(struct scsi_cmnd *cmd)
1879 {
1880 	adapter_t	*adapter;
1881 	megacmd_t	mc;
1882 	int		rval;
1883 
1884 	adapter = (adapter_t *)cmd->device->host->hostdata;
1885 
1886 #if MEGA_HAVE_CLUSTERING
1887 	mc.cmd = MEGA_CLUSTER_CMD;
1888 	mc.opcode = MEGA_RESET_RESERVATIONS;
1889 
1890 	if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1891 		dev_warn(&adapter->dev->dev, "reservation reset failed\n");
1892 	}
1893 	else {
1894 		dev_info(&adapter->dev->dev, "reservation reset\n");
1895 	}
1896 #endif
1897 
1898 	spin_lock_irq(&adapter->lock);
1899 
1900 	rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1901 
1902 	/*
1903 	 * This is required here to complete any completed requests
1904 	 * to be communicated over to the mid layer.
1905 	 */
1906 	mega_rundoneq(adapter);
1907 	spin_unlock_irq(&adapter->lock);
1908 
1909 	return rval;
1910 }
1911 
1912 /**
1913  * megaraid_abort_and_reset()
1914  * @adapter: megaraid soft state
1915  * @cmd: scsi command to be aborted or reset
1916  * @aor: abort or reset flag
1917  *
1918  * Try to locate the scsi command in the pending queue. If found and is not
1919  * issued to the controller, abort/reset it. Otherwise return failure
1920  */
1921 static int
megaraid_abort_and_reset(adapter_t * adapter,struct scsi_cmnd * cmd,int aor)1922 megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
1923 {
1924 	struct list_head	*pos, *next;
1925 	scb_t			*scb;
1926 
1927 	dev_warn(&adapter->dev->dev, "%s cmd=%x <c=%d t=%d l=%d>\n",
1928 	     (aor == SCB_ABORT)? "ABORTING":"RESET",
1929 	     cmd->cmnd[0], cmd->device->channel,
1930 	     cmd->device->id, (u32)cmd->device->lun);
1931 
1932 	if(list_empty(&adapter->pending_list))
1933 		return FAILED;
1934 
1935 	list_for_each_safe(pos, next, &adapter->pending_list) {
1936 
1937 		scb = list_entry(pos, scb_t, list);
1938 
1939 		if (scb->cmd == cmd) { /* Found command */
1940 
1941 			scb->state |= aor;
1942 
1943 			/*
1944 			 * Check if this command has firmware ownership. If
1945 			 * yes, we cannot reset this command. Whenever f/w
1946 			 * completes this command, we will return appropriate
1947 			 * status from ISR.
1948 			 */
1949 			if( scb->state & SCB_ISSUED ) {
1950 
1951 				dev_warn(&adapter->dev->dev,
1952 					"%s[%x], fw owner\n",
1953 					(aor==SCB_ABORT) ? "ABORTING":"RESET",
1954 					scb->idx);
1955 
1956 				return FAILED;
1957 			}
1958 			else {
1959 
1960 				/*
1961 				 * Not yet issued! Remove from the pending
1962 				 * list
1963 				 */
1964 				dev_warn(&adapter->dev->dev,
1965 					"%s-[%x], driver owner\n",
1966 					(aor==SCB_ABORT) ? "ABORTING":"RESET",
1967 					scb->idx);
1968 
1969 				mega_free_scb(adapter, scb);
1970 
1971 				if( aor == SCB_ABORT ) {
1972 					cmd->result = (DID_ABORT << 16);
1973 				}
1974 				else {
1975 					cmd->result = (DID_RESET << 16);
1976 				}
1977 
1978 				list_add_tail(SCSI_LIST(cmd),
1979 						&adapter->completed_list);
1980 
1981 				return SUCCESS;
1982 			}
1983 		}
1984 	}
1985 
1986 	return FAILED;
1987 }
1988 
1989 static inline int
make_local_pdev(adapter_t * adapter,struct pci_dev ** pdev)1990 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
1991 {
1992 	*pdev = pci_alloc_dev(NULL);
1993 
1994 	if( *pdev == NULL ) return -1;
1995 
1996 	memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
1997 
1998 	if (dma_set_mask(&(*pdev)->dev, DMA_BIT_MASK(32)) != 0) {
1999 		kfree(*pdev);
2000 		return -1;
2001 	}
2002 
2003 	return 0;
2004 }
2005 
2006 static inline void
free_local_pdev(struct pci_dev * pdev)2007 free_local_pdev(struct pci_dev *pdev)
2008 {
2009 	kfree(pdev);
2010 }
2011 
2012 /**
2013  * mega_allocate_inquiry()
2014  * @dma_handle: handle returned for dma address
2015  * @pdev: handle to pci device
2016  *
2017  * allocates memory for inquiry structure
2018  */
2019 static inline void *
mega_allocate_inquiry(dma_addr_t * dma_handle,struct pci_dev * pdev)2020 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2021 {
2022 	return dma_alloc_coherent(&pdev->dev, sizeof(mega_inquiry3),
2023 				  dma_handle, GFP_KERNEL);
2024 }
2025 
2026 
2027 static inline void
mega_free_inquiry(void * inquiry,dma_addr_t dma_handle,struct pci_dev * pdev)2028 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2029 {
2030 	dma_free_coherent(&pdev->dev, sizeof(mega_inquiry3), inquiry,
2031 			  dma_handle);
2032 }
2033 
2034 
2035 #ifdef CONFIG_PROC_FS
2036 /* Following code handles /proc fs  */
2037 
2038 /**
2039  * proc_show_config()
2040  * @m: Synthetic file construction data
2041  * @v: File iterator
2042  *
2043  * Display configuration information about the controller.
2044  */
2045 static int
proc_show_config(struct seq_file * m,void * v)2046 proc_show_config(struct seq_file *m, void *v)
2047 {
2048 
2049 	adapter_t *adapter = m->private;
2050 
2051 	seq_puts(m, MEGARAID_VERSION);
2052 	if(adapter->product_info.product_name[0])
2053 		seq_printf(m, "%s\n", adapter->product_info.product_name);
2054 
2055 	seq_puts(m, "Controller Type: ");
2056 
2057 	if( adapter->flag & BOARD_MEMMAP )
2058 		seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2059 	else
2060 		seq_puts(m, "418/428/434\n");
2061 
2062 	if(adapter->flag & BOARD_40LD)
2063 		seq_puts(m, "Controller Supports 40 Logical Drives\n");
2064 
2065 	if(adapter->flag & BOARD_64BIT)
2066 		seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2067 	if( adapter->has_64bit_addr )
2068 		seq_puts(m, "Controller using 64-bit memory addressing\n");
2069 	else
2070 		seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2071 
2072 	seq_printf(m, "Base = %08lx, Irq = %d, ",
2073 		   adapter->base, adapter->host->irq);
2074 
2075 	seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2076 		   adapter->numldrv, adapter->product_info.nchannels);
2077 
2078 	seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2079 		   adapter->fw_version, adapter->bios_version,
2080 		   adapter->product_info.dram_size);
2081 
2082 	seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2083 		   adapter->product_info.max_commands, adapter->max_cmds);
2084 
2085 	seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2086 	seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2087 	seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2088 	seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2089 	seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2090 	seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2091 	seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2092 	seq_printf(m, "quiescent          = %d\n",
2093 		   atomic_read(&adapter->quiescent));
2094 	seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2095 
2096 	seq_puts(m, "\nModule Parameters:\n");
2097 	seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2098 	seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2099 	return 0;
2100 }
2101 
2102 /**
2103  * proc_show_stat()
2104  * @m: Synthetic file construction data
2105  * @v: File iterator
2106  *
2107  * Display statistical information about the I/O activity.
2108  */
2109 static int
proc_show_stat(struct seq_file * m,void * v)2110 proc_show_stat(struct seq_file *m, void *v)
2111 {
2112 	adapter_t *adapter = m->private;
2113 #if MEGA_HAVE_STATS
2114 	int	i;
2115 #endif
2116 
2117 	seq_puts(m, "Statistical Information for this controller\n");
2118 	seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2119 #if MEGA_HAVE_STATS
2120 	for(i = 0; i < adapter->numldrv; i++) {
2121 		seq_printf(m, "Logical Drive %d:\n", i);
2122 		seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2123 			   adapter->nreads[i], adapter->nwrites[i]);
2124 		seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2125 			   adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2126 		seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2127 			   adapter->rd_errors[i], adapter->wr_errors[i]);
2128 	}
2129 #else
2130 	seq_puts(m, "IO and error counters not compiled in driver.\n");
2131 #endif
2132 	return 0;
2133 }
2134 
2135 
2136 /**
2137  * proc_show_mbox()
2138  * @m: Synthetic file construction data
2139  * @v: File iterator
2140  *
2141  * Display mailbox information for the last command issued. This information
2142  * is good for debugging.
2143  */
2144 static int
proc_show_mbox(struct seq_file * m,void * v)2145 proc_show_mbox(struct seq_file *m, void *v)
2146 {
2147 	adapter_t	*adapter = m->private;
2148 	volatile mbox_t	*mbox = adapter->mbox;
2149 
2150 	seq_puts(m, "Contents of Mail Box Structure\n");
2151 	seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2152 	seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2153 	seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2154 	seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2155 	seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2156 	seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2157 	seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2158 	seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2159 	seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2160 	return 0;
2161 }
2162 
2163 
2164 /**
2165  * proc_show_rebuild_rate()
2166  * @m: Synthetic file construction data
2167  * @v: File iterator
2168  *
2169  * Display current rebuild rate
2170  */
2171 static int
proc_show_rebuild_rate(struct seq_file * m,void * v)2172 proc_show_rebuild_rate(struct seq_file *m, void *v)
2173 {
2174 	adapter_t	*adapter = m->private;
2175 	dma_addr_t	dma_handle;
2176 	caddr_t		inquiry;
2177 	struct pci_dev	*pdev;
2178 
2179 	if( make_local_pdev(adapter, &pdev) != 0 )
2180 		return 0;
2181 
2182 	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2183 		goto free_pdev;
2184 
2185 	if( mega_adapinq(adapter, dma_handle) != 0 ) {
2186 		seq_puts(m, "Adapter inquiry failed.\n");
2187 		dev_warn(&adapter->dev->dev, "inquiry failed\n");
2188 		goto free_inquiry;
2189 	}
2190 
2191 	if( adapter->flag & BOARD_40LD )
2192 		seq_printf(m, "Rebuild Rate: [%d%%]\n",
2193 			   ((mega_inquiry3 *)inquiry)->rebuild_rate);
2194 	else
2195 		seq_printf(m, "Rebuild Rate: [%d%%]\n",
2196 			((mraid_ext_inquiry *)
2197 			 inquiry)->raid_inq.adapter_info.rebuild_rate);
2198 
2199 free_inquiry:
2200 	mega_free_inquiry(inquiry, dma_handle, pdev);
2201 free_pdev:
2202 	free_local_pdev(pdev);
2203 	return 0;
2204 }
2205 
2206 
2207 /**
2208  * proc_show_battery()
2209  * @m: Synthetic file construction data
2210  * @v: File iterator
2211  *
2212  * Display information about the battery module on the controller.
2213  */
2214 static int
proc_show_battery(struct seq_file * m,void * v)2215 proc_show_battery(struct seq_file *m, void *v)
2216 {
2217 	adapter_t	*adapter = m->private;
2218 	dma_addr_t	dma_handle;
2219 	caddr_t		inquiry;
2220 	struct pci_dev	*pdev;
2221 	u8	battery_status;
2222 
2223 	if( make_local_pdev(adapter, &pdev) != 0 )
2224 		return 0;
2225 
2226 	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2227 		goto free_pdev;
2228 
2229 	if( mega_adapinq(adapter, dma_handle) != 0 ) {
2230 		seq_puts(m, "Adapter inquiry failed.\n");
2231 		dev_warn(&adapter->dev->dev, "inquiry failed\n");
2232 		goto free_inquiry;
2233 	}
2234 
2235 	if( adapter->flag & BOARD_40LD ) {
2236 		battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2237 	}
2238 	else {
2239 		battery_status = ((mraid_ext_inquiry *)inquiry)->
2240 			raid_inq.adapter_info.battery_status;
2241 	}
2242 
2243 	/*
2244 	 * Decode the battery status
2245 	 */
2246 	seq_printf(m, "Battery Status:[%d]", battery_status);
2247 
2248 	if(battery_status == MEGA_BATT_CHARGE_DONE)
2249 		seq_puts(m, " Charge Done");
2250 
2251 	if(battery_status & MEGA_BATT_MODULE_MISSING)
2252 		seq_puts(m, " Module Missing");
2253 
2254 	if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2255 		seq_puts(m, " Low Voltage");
2256 
2257 	if(battery_status & MEGA_BATT_TEMP_HIGH)
2258 		seq_puts(m, " Temperature High");
2259 
2260 	if(battery_status & MEGA_BATT_PACK_MISSING)
2261 		seq_puts(m, " Pack Missing");
2262 
2263 	if(battery_status & MEGA_BATT_CHARGE_INPROG)
2264 		seq_puts(m, " Charge In-progress");
2265 
2266 	if(battery_status & MEGA_BATT_CHARGE_FAIL)
2267 		seq_puts(m, " Charge Fail");
2268 
2269 	if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2270 		seq_puts(m, " Cycles Exceeded");
2271 
2272 	seq_putc(m, '\n');
2273 
2274 free_inquiry:
2275 	mega_free_inquiry(inquiry, dma_handle, pdev);
2276 free_pdev:
2277 	free_local_pdev(pdev);
2278 	return 0;
2279 }
2280 
2281 
2282 /*
2283  * Display scsi inquiry
2284  */
2285 static void
mega_print_inquiry(struct seq_file * m,char * scsi_inq)2286 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2287 {
2288 	int	i;
2289 
2290 	seq_puts(m, "  Vendor: ");
2291 	seq_write(m, scsi_inq + 8, 8);
2292 	seq_puts(m, "  Model: ");
2293 	seq_write(m, scsi_inq + 16, 16);
2294 	seq_puts(m, "  Rev: ");
2295 	seq_write(m, scsi_inq + 32, 4);
2296 	seq_putc(m, '\n');
2297 
2298 	i = scsi_inq[0] & 0x1f;
2299 	seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2300 
2301 	seq_printf(m, "                 ANSI SCSI revision: %02x",
2302 		   scsi_inq[2] & 0x07);
2303 
2304 	if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2305 		seq_puts(m, " CCS\n");
2306 	else
2307 		seq_putc(m, '\n');
2308 }
2309 
2310 /**
2311  * proc_show_pdrv()
2312  * @m: Synthetic file construction data
2313  * @adapter: pointer to our soft state
2314  * @channel: channel
2315  *
2316  * Display information about the physical drives.
2317  */
2318 static int
proc_show_pdrv(struct seq_file * m,adapter_t * adapter,int channel)2319 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2320 {
2321 	dma_addr_t	dma_handle;
2322 	char		*scsi_inq;
2323 	dma_addr_t	scsi_inq_dma_handle;
2324 	caddr_t		inquiry;
2325 	struct pci_dev	*pdev;
2326 	u8	*pdrv_state;
2327 	u8	state;
2328 	int	tgt;
2329 	int	max_channels;
2330 	int	i;
2331 
2332 	if( make_local_pdev(adapter, &pdev) != 0 )
2333 		return 0;
2334 
2335 	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2336 		goto free_pdev;
2337 
2338 	if( mega_adapinq(adapter, dma_handle) != 0 ) {
2339 		seq_puts(m, "Adapter inquiry failed.\n");
2340 		dev_warn(&adapter->dev->dev, "inquiry failed\n");
2341 		goto free_inquiry;
2342 	}
2343 
2344 
2345 	scsi_inq = dma_alloc_coherent(&pdev->dev, 256, &scsi_inq_dma_handle,
2346 				      GFP_KERNEL);
2347 	if( scsi_inq == NULL ) {
2348 		seq_puts(m, "memory not available for scsi inq.\n");
2349 		goto free_inquiry;
2350 	}
2351 
2352 	if( adapter->flag & BOARD_40LD ) {
2353 		pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2354 	}
2355 	else {
2356 		pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2357 			raid_inq.pdrv_info.pdrv_state;
2358 	}
2359 
2360 	max_channels = adapter->product_info.nchannels;
2361 
2362 	if( channel >= max_channels ) {
2363 		goto free_pci;
2364 	}
2365 
2366 	for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2367 
2368 		i = channel*16 + tgt;
2369 
2370 		state = *(pdrv_state + i);
2371 		switch( state & 0x0F ) {
2372 		case PDRV_ONLINE:
2373 			seq_printf(m, "Channel:%2d Id:%2d State: Online",
2374 				   channel, tgt);
2375 			break;
2376 
2377 		case PDRV_FAILED:
2378 			seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2379 				   channel, tgt);
2380 			break;
2381 
2382 		case PDRV_RBLD:
2383 			seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2384 				   channel, tgt);
2385 			break;
2386 
2387 		case PDRV_HOTSPARE:
2388 			seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2389 				   channel, tgt);
2390 			break;
2391 
2392 		default:
2393 			seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2394 				   channel, tgt);
2395 			break;
2396 		}
2397 
2398 		/*
2399 		 * This interface displays inquiries for disk drives
2400 		 * only. Inquries for logical drives and non-disk
2401 		 * devices are available through /proc/scsi/scsi
2402 		 */
2403 		memset(scsi_inq, 0, 256);
2404 		if( mega_internal_dev_inquiry(adapter, channel, tgt,
2405 				scsi_inq_dma_handle) ||
2406 				(scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2407 			continue;
2408 		}
2409 
2410 		/*
2411 		 * Check for overflow. We print less than 240
2412 		 * characters for inquiry
2413 		 */
2414 		seq_puts(m, ".\n");
2415 		mega_print_inquiry(m, scsi_inq);
2416 	}
2417 
2418 free_pci:
2419 	dma_free_coherent(&pdev->dev, 256, scsi_inq, scsi_inq_dma_handle);
2420 free_inquiry:
2421 	mega_free_inquiry(inquiry, dma_handle, pdev);
2422 free_pdev:
2423 	free_local_pdev(pdev);
2424 	return 0;
2425 }
2426 
2427 /**
2428  * proc_show_pdrv_ch0()
2429  * @m: Synthetic file construction data
2430  * @v: File iterator
2431  *
2432  * Display information about the physical drives on physical channel 0.
2433  */
2434 static int
proc_show_pdrv_ch0(struct seq_file * m,void * v)2435 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2436 {
2437 	return proc_show_pdrv(m, m->private, 0);
2438 }
2439 
2440 
2441 /**
2442  * proc_show_pdrv_ch1()
2443  * @m: Synthetic file construction data
2444  * @v: File iterator
2445  *
2446  * Display information about the physical drives on physical channel 1.
2447  */
2448 static int
proc_show_pdrv_ch1(struct seq_file * m,void * v)2449 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2450 {
2451 	return proc_show_pdrv(m, m->private, 1);
2452 }
2453 
2454 
2455 /**
2456  * proc_show_pdrv_ch2()
2457  * @m: Synthetic file construction data
2458  * @v: File iterator
2459  *
2460  * Display information about the physical drives on physical channel 2.
2461  */
2462 static int
proc_show_pdrv_ch2(struct seq_file * m,void * v)2463 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2464 {
2465 	return proc_show_pdrv(m, m->private, 2);
2466 }
2467 
2468 
2469 /**
2470  * proc_show_pdrv_ch3()
2471  * @m: Synthetic file construction data
2472  * @v: File iterator
2473  *
2474  * Display information about the physical drives on physical channel 3.
2475  */
2476 static int
proc_show_pdrv_ch3(struct seq_file * m,void * v)2477 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2478 {
2479 	return proc_show_pdrv(m, m->private, 3);
2480 }
2481 
2482 
2483 /**
2484  * proc_show_rdrv()
2485  * @m: Synthetic file construction data
2486  * @adapter: pointer to our soft state
2487  * @start: starting logical drive to display
2488  * @end: ending logical drive to display
2489  *
2490  * We do not print the inquiry information since its already available through
2491  * /proc/scsi/scsi interface
2492  */
2493 static int
proc_show_rdrv(struct seq_file * m,adapter_t * adapter,int start,int end)2494 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2495 {
2496 	dma_addr_t	dma_handle;
2497 	logdrv_param	*lparam;
2498 	megacmd_t	mc;
2499 	char		*disk_array;
2500 	dma_addr_t	disk_array_dma_handle;
2501 	caddr_t		inquiry;
2502 	struct pci_dev	*pdev;
2503 	u8	*rdrv_state;
2504 	int	num_ldrv;
2505 	u32	array_sz;
2506 	int	i;
2507 
2508 	if( make_local_pdev(adapter, &pdev) != 0 )
2509 		return 0;
2510 
2511 	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2512 		goto free_pdev;
2513 
2514 	if( mega_adapinq(adapter, dma_handle) != 0 ) {
2515 		seq_puts(m, "Adapter inquiry failed.\n");
2516 		dev_warn(&adapter->dev->dev, "inquiry failed\n");
2517 		goto free_inquiry;
2518 	}
2519 
2520 	memset(&mc, 0, sizeof(megacmd_t));
2521 
2522 	if( adapter->flag & BOARD_40LD ) {
2523 		array_sz = sizeof(disk_array_40ld);
2524 
2525 		rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2526 
2527 		num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2528 	}
2529 	else {
2530 		array_sz = sizeof(disk_array_8ld);
2531 
2532 		rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2533 			raid_inq.logdrv_info.ldrv_state;
2534 
2535 		num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2536 			raid_inq.logdrv_info.num_ldrv;
2537 	}
2538 
2539 	disk_array = dma_alloc_coherent(&pdev->dev, array_sz,
2540 					&disk_array_dma_handle, GFP_KERNEL);
2541 
2542 	if( disk_array == NULL ) {
2543 		seq_puts(m, "memory not available.\n");
2544 		goto free_inquiry;
2545 	}
2546 
2547 	mc.xferaddr = (u32)disk_array_dma_handle;
2548 
2549 	if( adapter->flag & BOARD_40LD ) {
2550 		mc.cmd = FC_NEW_CONFIG;
2551 		mc.opcode = OP_DCMD_READ_CONFIG;
2552 
2553 		if( mega_internal_command(adapter, &mc, NULL) ) {
2554 			seq_puts(m, "40LD read config failed.\n");
2555 			goto free_pci;
2556 		}
2557 
2558 	}
2559 	else {
2560 		mc.cmd = NEW_READ_CONFIG_8LD;
2561 
2562 		if( mega_internal_command(adapter, &mc, NULL) ) {
2563 			mc.cmd = READ_CONFIG_8LD;
2564 			if( mega_internal_command(adapter, &mc, NULL) ) {
2565 				seq_puts(m, "8LD read config failed.\n");
2566 				goto free_pci;
2567 			}
2568 		}
2569 	}
2570 
2571 	for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2572 
2573 		if( adapter->flag & BOARD_40LD ) {
2574 			lparam =
2575 			&((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2576 		}
2577 		else {
2578 			lparam =
2579 			&((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2580 		}
2581 
2582 		/*
2583 		 * Check for overflow. We print less than 240 characters for
2584 		 * information about each logical drive.
2585 		 */
2586 		seq_printf(m, "Logical drive:%2d:, ", i);
2587 
2588 		switch( rdrv_state[i] & 0x0F ) {
2589 		case RDRV_OFFLINE:
2590 			seq_puts(m, "state: offline");
2591 			break;
2592 		case RDRV_DEGRADED:
2593 			seq_puts(m, "state: degraded");
2594 			break;
2595 		case RDRV_OPTIMAL:
2596 			seq_puts(m, "state: optimal");
2597 			break;
2598 		case RDRV_DELETED:
2599 			seq_puts(m, "state: deleted");
2600 			break;
2601 		default:
2602 			seq_puts(m, "state: unknown");
2603 			break;
2604 		}
2605 
2606 		/*
2607 		 * Check if check consistency or initialization is going on
2608 		 * for this logical drive.
2609 		 */
2610 		if( (rdrv_state[i] & 0xF0) == 0x20 )
2611 			seq_puts(m, ", check-consistency in progress");
2612 		else if( (rdrv_state[i] & 0xF0) == 0x10 )
2613 			seq_puts(m, ", initialization in progress");
2614 
2615 		seq_putc(m, '\n');
2616 
2617 		seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2618 		seq_printf(m, "RAID level:%3d, ", lparam->level);
2619 		seq_printf(m, "Stripe size:%3d, ",
2620 			   lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2621 		seq_printf(m, "Row size:%3d\n", lparam->row_size);
2622 
2623 		seq_puts(m, "Read Policy: ");
2624 		switch(lparam->read_ahead) {
2625 		case NO_READ_AHEAD:
2626 			seq_puts(m, "No read ahead, ");
2627 			break;
2628 		case READ_AHEAD:
2629 			seq_puts(m, "Read ahead, ");
2630 			break;
2631 		case ADAP_READ_AHEAD:
2632 			seq_puts(m, "Adaptive, ");
2633 			break;
2634 
2635 		}
2636 
2637 		seq_puts(m, "Write Policy: ");
2638 		switch(lparam->write_mode) {
2639 		case WRMODE_WRITE_THRU:
2640 			seq_puts(m, "Write thru, ");
2641 			break;
2642 		case WRMODE_WRITE_BACK:
2643 			seq_puts(m, "Write back, ");
2644 			break;
2645 		}
2646 
2647 		seq_puts(m, "Cache Policy: ");
2648 		switch(lparam->direct_io) {
2649 		case CACHED_IO:
2650 			seq_puts(m, "Cached IO\n\n");
2651 			break;
2652 		case DIRECT_IO:
2653 			seq_puts(m, "Direct IO\n\n");
2654 			break;
2655 		}
2656 	}
2657 
2658 free_pci:
2659 	dma_free_coherent(&pdev->dev, array_sz, disk_array,
2660 			  disk_array_dma_handle);
2661 free_inquiry:
2662 	mega_free_inquiry(inquiry, dma_handle, pdev);
2663 free_pdev:
2664 	free_local_pdev(pdev);
2665 	return 0;
2666 }
2667 
2668 /**
2669  * proc_show_rdrv_10()
2670  * @m: Synthetic file construction data
2671  * @v: File iterator
2672  *
2673  * Display real time information about the logical drives 0 through 9.
2674  */
2675 static int
proc_show_rdrv_10(struct seq_file * m,void * v)2676 proc_show_rdrv_10(struct seq_file *m, void *v)
2677 {
2678 	return proc_show_rdrv(m, m->private, 0, 9);
2679 }
2680 
2681 
2682 /**
2683  * proc_show_rdrv_20()
2684  * @m: Synthetic file construction data
2685  * @v: File iterator
2686  *
2687  * Display real time information about the logical drives 0 through 9.
2688  */
2689 static int
proc_show_rdrv_20(struct seq_file * m,void * v)2690 proc_show_rdrv_20(struct seq_file *m, void *v)
2691 {
2692 	return proc_show_rdrv(m, m->private, 10, 19);
2693 }
2694 
2695 
2696 /**
2697  * proc_show_rdrv_30()
2698  * @m: Synthetic file construction data
2699  * @v: File iterator
2700  *
2701  * Display real time information about the logical drives 0 through 9.
2702  */
2703 static int
proc_show_rdrv_30(struct seq_file * m,void * v)2704 proc_show_rdrv_30(struct seq_file *m, void *v)
2705 {
2706 	return proc_show_rdrv(m, m->private, 20, 29);
2707 }
2708 
2709 
2710 /**
2711  * proc_show_rdrv_40()
2712  * @m: Synthetic file construction data
2713  * @v: File iterator
2714  *
2715  * Display real time information about the logical drives 0 through 9.
2716  */
2717 static int
proc_show_rdrv_40(struct seq_file * m,void * v)2718 proc_show_rdrv_40(struct seq_file *m, void *v)
2719 {
2720 	return proc_show_rdrv(m, m->private, 30, 39);
2721 }
2722 
2723 /**
2724  * mega_create_proc_entry()
2725  * @index: index in soft state array
2726  * @parent: parent node for this /proc entry
2727  *
2728  * Creates /proc entries for our controllers.
2729  */
2730 static void
mega_create_proc_entry(int index,struct proc_dir_entry * parent)2731 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2732 {
2733 	adapter_t *adapter = hba_soft_state[index];
2734 	struct proc_dir_entry *dir;
2735 	u8 string[16];
2736 
2737 	sprintf(string, "hba%d", adapter->host->host_no);
2738 	dir = proc_mkdir_data(string, 0, parent, adapter);
2739 	if (!dir) {
2740 		dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
2741 		return;
2742 	}
2743 
2744 	proc_create_single_data("config", S_IRUSR, dir,
2745 			proc_show_config, adapter);
2746 	proc_create_single_data("stat", S_IRUSR, dir,
2747 			proc_show_stat, adapter);
2748 	proc_create_single_data("mailbox", S_IRUSR, dir,
2749 			proc_show_mbox, adapter);
2750 #if MEGA_HAVE_ENH_PROC
2751 	proc_create_single_data("rebuild-rate", S_IRUSR, dir,
2752 			proc_show_rebuild_rate, adapter);
2753 	proc_create_single_data("battery-status", S_IRUSR, dir,
2754 			proc_show_battery, adapter);
2755 	proc_create_single_data("diskdrives-ch0", S_IRUSR, dir,
2756 			proc_show_pdrv_ch0, adapter);
2757 	proc_create_single_data("diskdrives-ch1", S_IRUSR, dir,
2758 			proc_show_pdrv_ch1, adapter);
2759 	proc_create_single_data("diskdrives-ch2", S_IRUSR, dir,
2760 			proc_show_pdrv_ch2, adapter);
2761 	proc_create_single_data("diskdrives-ch3", S_IRUSR, dir,
2762 			proc_show_pdrv_ch3, adapter);
2763 	proc_create_single_data("raiddrives-0-9", S_IRUSR, dir,
2764 			proc_show_rdrv_10, adapter);
2765 	proc_create_single_data("raiddrives-10-19", S_IRUSR, dir,
2766 			proc_show_rdrv_20, adapter);
2767 	proc_create_single_data("raiddrives-20-29", S_IRUSR, dir,
2768 			proc_show_rdrv_30, adapter);
2769 	proc_create_single_data("raiddrives-30-39", S_IRUSR, dir,
2770 			proc_show_rdrv_40, adapter);
2771 #endif
2772 }
2773 
2774 #else
mega_create_proc_entry(int index,struct proc_dir_entry * parent)2775 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2776 {
2777 }
2778 #endif
2779 
2780 
2781 /*
2782  * megaraid_biosparam()
2783  *
2784  * Return the disk geometry for a particular disk
2785  */
2786 static int
megaraid_biosparam(struct scsi_device * sdev,struct block_device * bdev,sector_t capacity,int geom[])2787 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2788 		    sector_t capacity, int geom[])
2789 {
2790 	adapter_t	*adapter;
2791 	int	heads;
2792 	int	sectors;
2793 	int	cylinders;
2794 
2795 	/* Get pointer to host config structure */
2796 	adapter = (adapter_t *)sdev->host->hostdata;
2797 
2798 	if (IS_RAID_CH(adapter, sdev->channel)) {
2799 			/* Default heads (64) & sectors (32) */
2800 			heads = 64;
2801 			sectors = 32;
2802 			cylinders = (ulong)capacity / (heads * sectors);
2803 
2804 			/*
2805 			 * Handle extended translation size for logical drives
2806 			 * > 1Gb
2807 			 */
2808 			if ((ulong)capacity >= 0x200000) {
2809 				heads = 255;
2810 				sectors = 63;
2811 				cylinders = (ulong)capacity / (heads * sectors);
2812 			}
2813 
2814 			/* return result */
2815 			geom[0] = heads;
2816 			geom[1] = sectors;
2817 			geom[2] = cylinders;
2818 	}
2819 	else {
2820 		if (scsi_partsize(bdev, capacity, geom))
2821 			return 0;
2822 
2823 		dev_info(&adapter->dev->dev,
2824 			 "invalid partition on this disk on channel %d\n",
2825 			 sdev->channel);
2826 
2827 		/* Default heads (64) & sectors (32) */
2828 		heads = 64;
2829 		sectors = 32;
2830 		cylinders = (ulong)capacity / (heads * sectors);
2831 
2832 		/* Handle extended translation size for logical drives > 1Gb */
2833 		if ((ulong)capacity >= 0x200000) {
2834 			heads = 255;
2835 			sectors = 63;
2836 			cylinders = (ulong)capacity / (heads * sectors);
2837 		}
2838 
2839 		/* return result */
2840 		geom[0] = heads;
2841 		geom[1] = sectors;
2842 		geom[2] = cylinders;
2843 	}
2844 
2845 	return 0;
2846 }
2847 
2848 /**
2849  * mega_init_scb()
2850  * @adapter: pointer to our soft state
2851  *
2852  * Allocate memory for the various pointers in the scb structures:
2853  * scatter-gather list pointer, passthru and extended passthru structure
2854  * pointers.
2855  */
2856 static int
mega_init_scb(adapter_t * adapter)2857 mega_init_scb(adapter_t *adapter)
2858 {
2859 	scb_t	*scb;
2860 	int	i;
2861 
2862 	for( i = 0; i < adapter->max_cmds; i++ ) {
2863 
2864 		scb = &adapter->scb_list[i];
2865 
2866 		scb->sgl64 = NULL;
2867 		scb->sgl = NULL;
2868 		scb->pthru = NULL;
2869 		scb->epthru = NULL;
2870 	}
2871 
2872 	for( i = 0; i < adapter->max_cmds; i++ ) {
2873 
2874 		scb = &adapter->scb_list[i];
2875 
2876 		scb->idx = i;
2877 
2878 		scb->sgl64 = dma_alloc_coherent(&adapter->dev->dev,
2879 						sizeof(mega_sgl64) * adapter->sglen,
2880 						&scb->sgl_dma_addr, GFP_KERNEL);
2881 
2882 		scb->sgl = (mega_sglist *)scb->sgl64;
2883 
2884 		if( !scb->sgl ) {
2885 			dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
2886 			mega_free_sgl(adapter);
2887 			return -1;
2888 		}
2889 
2890 		scb->pthru = dma_alloc_coherent(&adapter->dev->dev,
2891 						sizeof(mega_passthru),
2892 						&scb->pthru_dma_addr, GFP_KERNEL);
2893 
2894 		if( !scb->pthru ) {
2895 			dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
2896 			mega_free_sgl(adapter);
2897 			return -1;
2898 		}
2899 
2900 		scb->epthru = dma_alloc_coherent(&adapter->dev->dev,
2901 						 sizeof(mega_ext_passthru),
2902 						 &scb->epthru_dma_addr, GFP_KERNEL);
2903 
2904 		if( !scb->epthru ) {
2905 			dev_warn(&adapter->dev->dev,
2906 				"Can't allocate extended passthru\n");
2907 			mega_free_sgl(adapter);
2908 			return -1;
2909 		}
2910 
2911 
2912 		scb->dma_type = MEGA_DMA_TYPE_NONE;
2913 
2914 		/*
2915 		 * Link to free list
2916 		 * lock not required since we are loading the driver, so no
2917 		 * commands possible right now.
2918 		 */
2919 		scb->state = SCB_FREE;
2920 		scb->cmd = NULL;
2921 		list_add(&scb->list, &adapter->free_list);
2922 	}
2923 
2924 	return 0;
2925 }
2926 
2927 
2928 /**
2929  * megadev_open()
2930  * @inode: unused
2931  * @filep: unused
2932  *
2933  * Routines for the character/ioctl interface to the driver. Find out if this
2934  * is a valid open.
2935  */
2936 static int
megadev_open(struct inode * inode,struct file * filep)2937 megadev_open (struct inode *inode, struct file *filep)
2938 {
2939 	/*
2940 	 * Only allow superuser to access private ioctl interface
2941 	 */
2942 	if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2943 
2944 	return 0;
2945 }
2946 
2947 
2948 /**
2949  * megadev_ioctl()
2950  * @filep: Our device file
2951  * @cmd: ioctl command
2952  * @arg: user buffer
2953  *
2954  * ioctl entry point for our private ioctl interface. We move the data in from
2955  * the user space, prepare the command (if necessary, convert the old MIMD
2956  * ioctl to new ioctl command), and issue a synchronous command to the
2957  * controller.
2958  */
2959 static int
megadev_ioctl(struct file * filep,unsigned int cmd,unsigned long arg)2960 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
2961 {
2962 	adapter_t	*adapter;
2963 	nitioctl_t	uioc;
2964 	int		adapno;
2965 	int		rval;
2966 	mega_passthru	__user *upthru;	/* user address for passthru */
2967 	mega_passthru	*pthru;		/* copy user passthru here */
2968 	dma_addr_t	pthru_dma_hndl;
2969 	void		*data = NULL;	/* data to be transferred */
2970 	dma_addr_t	data_dma_hndl;	/* dma handle for data xfer area */
2971 	megacmd_t	mc;
2972 #if MEGA_HAVE_STATS
2973 	megastat_t	__user *ustats = NULL;
2974 	int		num_ldrv = 0;
2975 #endif
2976 	u32		uxferaddr = 0;
2977 	struct pci_dev	*pdev;
2978 
2979 	/*
2980 	 * Make sure only USCSICMD are issued through this interface.
2981 	 * MIMD application would still fire different command.
2982 	 */
2983 	if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
2984 		return -EINVAL;
2985 	}
2986 
2987 	/*
2988 	 * Check and convert a possible MIMD command to NIT command.
2989 	 * mega_m_to_n() copies the data from the user space, so we do not
2990 	 * have to do it here.
2991 	 * NOTE: We will need some user address to copyout the data, therefore
2992 	 * the inteface layer will also provide us with the required user
2993 	 * addresses.
2994 	 */
2995 	memset(&uioc, 0, sizeof(nitioctl_t));
2996 	if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
2997 		return rval;
2998 
2999 
3000 	switch( uioc.opcode ) {
3001 
3002 	case GET_DRIVER_VER:
3003 		if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3004 			return (-EFAULT);
3005 
3006 		break;
3007 
3008 	case GET_N_ADAP:
3009 		if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3010 			return (-EFAULT);
3011 
3012 		/*
3013 		 * Shucks. MIMD interface returns a positive value for number
3014 		 * of adapters. TODO: Change it to return 0 when there is no
3015 		 * applicatio using mimd interface.
3016 		 */
3017 		return hba_count;
3018 
3019 	case GET_ADAP_INFO:
3020 
3021 		/*
3022 		 * Which adapter
3023 		 */
3024 		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3025 			return (-ENODEV);
3026 
3027 		if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3028 				sizeof(struct mcontroller)) )
3029 			return (-EFAULT);
3030 		break;
3031 
3032 #if MEGA_HAVE_STATS
3033 
3034 	case GET_STATS:
3035 		/*
3036 		 * Which adapter
3037 		 */
3038 		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3039 			return (-ENODEV);
3040 
3041 		adapter = hba_soft_state[adapno];
3042 
3043 		ustats = uioc.uioc_uaddr;
3044 
3045 		if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3046 			return (-EFAULT);
3047 
3048 		/*
3049 		 * Check for the validity of the logical drive number
3050 		 */
3051 		if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3052 
3053 		if( copy_to_user(ustats->nreads, adapter->nreads,
3054 					num_ldrv*sizeof(u32)) )
3055 			return -EFAULT;
3056 
3057 		if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3058 					num_ldrv*sizeof(u32)) )
3059 			return -EFAULT;
3060 
3061 		if( copy_to_user(ustats->nwrites, adapter->nwrites,
3062 					num_ldrv*sizeof(u32)) )
3063 			return -EFAULT;
3064 
3065 		if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3066 					num_ldrv*sizeof(u32)) )
3067 			return -EFAULT;
3068 
3069 		if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3070 					num_ldrv*sizeof(u32)) )
3071 			return -EFAULT;
3072 
3073 		if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3074 					num_ldrv*sizeof(u32)) )
3075 			return -EFAULT;
3076 
3077 		return 0;
3078 
3079 #endif
3080 	case MBOX_CMD:
3081 
3082 		/*
3083 		 * Which adapter
3084 		 */
3085 		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3086 			return (-ENODEV);
3087 
3088 		adapter = hba_soft_state[adapno];
3089 
3090 		/*
3091 		 * Deletion of logical drive is a special case. The adapter
3092 		 * should be quiescent before this command is issued.
3093 		 */
3094 		if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3095 				uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3096 
3097 			/*
3098 			 * Do we support this feature
3099 			 */
3100 			if( !adapter->support_random_del ) {
3101 				dev_warn(&adapter->dev->dev, "logdrv "
3102 					"delete on non-supporting F/W\n");
3103 
3104 				return (-EINVAL);
3105 			}
3106 
3107 			rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3108 
3109 			if( rval == 0 ) {
3110 				memset(&mc, 0, sizeof(megacmd_t));
3111 
3112 				mc.status = rval;
3113 
3114 				rval = mega_n_to_m((void __user *)arg, &mc);
3115 			}
3116 
3117 			return rval;
3118 		}
3119 		/*
3120 		 * This interface only support the regular passthru commands.
3121 		 * Reject extended passthru and 64-bit passthru
3122 		 */
3123 		if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3124 			uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3125 
3126 			dev_warn(&adapter->dev->dev, "rejected passthru\n");
3127 
3128 			return (-EINVAL);
3129 		}
3130 
3131 		/*
3132 		 * For all internal commands, the buffer must be allocated in
3133 		 * <4GB address range
3134 		 */
3135 		if( make_local_pdev(adapter, &pdev) != 0 )
3136 			return -EIO;
3137 
3138 		/* Is it a passthru command or a DCMD */
3139 		if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3140 			/* Passthru commands */
3141 
3142 			pthru = dma_alloc_coherent(&pdev->dev,
3143 						   sizeof(mega_passthru),
3144 						   &pthru_dma_hndl, GFP_KERNEL);
3145 
3146 			if( pthru == NULL ) {
3147 				free_local_pdev(pdev);
3148 				return (-ENOMEM);
3149 			}
3150 
3151 			/*
3152 			 * The user passthru structure
3153 			 */
3154 			upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3155 
3156 			/*
3157 			 * Copy in the user passthru here.
3158 			 */
3159 			if( copy_from_user(pthru, upthru,
3160 						sizeof(mega_passthru)) ) {
3161 
3162 				dma_free_coherent(&pdev->dev,
3163 						  sizeof(mega_passthru),
3164 						  pthru, pthru_dma_hndl);
3165 
3166 				free_local_pdev(pdev);
3167 
3168 				return (-EFAULT);
3169 			}
3170 
3171 			/*
3172 			 * Is there a data transfer
3173 			 */
3174 			if( pthru->dataxferlen ) {
3175 				data = dma_alloc_coherent(&pdev->dev,
3176 							  pthru->dataxferlen,
3177 							  &data_dma_hndl,
3178 							  GFP_KERNEL);
3179 
3180 				if( data == NULL ) {
3181 					dma_free_coherent(&pdev->dev,
3182 							  sizeof(mega_passthru),
3183 							  pthru,
3184 							  pthru_dma_hndl);
3185 
3186 					free_local_pdev(pdev);
3187 
3188 					return (-ENOMEM);
3189 				}
3190 
3191 				/*
3192 				 * Save the user address and point the kernel
3193 				 * address at just allocated memory
3194 				 */
3195 				uxferaddr = pthru->dataxferaddr;
3196 				pthru->dataxferaddr = data_dma_hndl;
3197 			}
3198 
3199 
3200 			/*
3201 			 * Is data coming down-stream
3202 			 */
3203 			if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3204 				/*
3205 				 * Get the user data
3206 				 */
3207 				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3208 							pthru->dataxferlen) ) {
3209 					rval = (-EFAULT);
3210 					goto freemem_and_return;
3211 				}
3212 			}
3213 
3214 			memset(&mc, 0, sizeof(megacmd_t));
3215 
3216 			mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3217 			mc.xferaddr = (u32)pthru_dma_hndl;
3218 
3219 			/*
3220 			 * Issue the command
3221 			 */
3222 			mega_internal_command(adapter, &mc, pthru);
3223 
3224 			rval = mega_n_to_m((void __user *)arg, &mc);
3225 
3226 			if( rval ) goto freemem_and_return;
3227 
3228 
3229 			/*
3230 			 * Is data going up-stream
3231 			 */
3232 			if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3233 				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3234 							pthru->dataxferlen) ) {
3235 					rval = (-EFAULT);
3236 				}
3237 			}
3238 
3239 			/*
3240 			 * Send the request sense data also, irrespective of
3241 			 * whether the user has asked for it or not.
3242 			 */
3243 			if (copy_to_user(upthru->reqsensearea,
3244 					pthru->reqsensearea, 14))
3245 				rval = -EFAULT;
3246 
3247 freemem_and_return:
3248 			if( pthru->dataxferlen ) {
3249 				dma_free_coherent(&pdev->dev,
3250 						  pthru->dataxferlen, data,
3251 						  data_dma_hndl);
3252 			}
3253 
3254 			dma_free_coherent(&pdev->dev, sizeof(mega_passthru),
3255 					  pthru, pthru_dma_hndl);
3256 
3257 			free_local_pdev(pdev);
3258 
3259 			return rval;
3260 		}
3261 		else {
3262 			/* DCMD commands */
3263 
3264 			/*
3265 			 * Is there a data transfer
3266 			 */
3267 			if( uioc.xferlen ) {
3268 				data = dma_alloc_coherent(&pdev->dev,
3269 							  uioc.xferlen,
3270 							  &data_dma_hndl,
3271 							  GFP_KERNEL);
3272 
3273 				if( data == NULL ) {
3274 					free_local_pdev(pdev);
3275 					return (-ENOMEM);
3276 				}
3277 
3278 				uxferaddr = MBOX(uioc)->xferaddr;
3279 			}
3280 
3281 			/*
3282 			 * Is data coming down-stream
3283 			 */
3284 			if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3285 				/*
3286 				 * Get the user data
3287 				 */
3288 				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3289 							uioc.xferlen) ) {
3290 
3291 					dma_free_coherent(&pdev->dev,
3292 							  uioc.xferlen, data,
3293 							  data_dma_hndl);
3294 
3295 					free_local_pdev(pdev);
3296 
3297 					return (-EFAULT);
3298 				}
3299 			}
3300 
3301 			memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3302 
3303 			mc.xferaddr = (u32)data_dma_hndl;
3304 
3305 			/*
3306 			 * Issue the command
3307 			 */
3308 			mega_internal_command(adapter, &mc, NULL);
3309 
3310 			rval = mega_n_to_m((void __user *)arg, &mc);
3311 
3312 			if( rval ) {
3313 				if( uioc.xferlen ) {
3314 					dma_free_coherent(&pdev->dev,
3315 							  uioc.xferlen, data,
3316 							  data_dma_hndl);
3317 				}
3318 
3319 				free_local_pdev(pdev);
3320 
3321 				return rval;
3322 			}
3323 
3324 			/*
3325 			 * Is data going up-stream
3326 			 */
3327 			if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3328 				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3329 							uioc.xferlen) ) {
3330 
3331 					rval = (-EFAULT);
3332 				}
3333 			}
3334 
3335 			if( uioc.xferlen ) {
3336 				dma_free_coherent(&pdev->dev, uioc.xferlen,
3337 						  data, data_dma_hndl);
3338 			}
3339 
3340 			free_local_pdev(pdev);
3341 
3342 			return rval;
3343 		}
3344 
3345 	default:
3346 		return (-EINVAL);
3347 	}
3348 
3349 	return 0;
3350 }
3351 
3352 static long
megadev_unlocked_ioctl(struct file * filep,unsigned int cmd,unsigned long arg)3353 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3354 {
3355 	int ret;
3356 
3357 	mutex_lock(&megadev_mutex);
3358 	ret = megadev_ioctl(filep, cmd, arg);
3359 	mutex_unlock(&megadev_mutex);
3360 
3361 	return ret;
3362 }
3363 
3364 /**
3365  * mega_m_to_n()
3366  * @arg: user address
3367  * @uioc: new ioctl structure
3368  *
3369  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3370  * structure
3371  *
3372  * Converts the older mimd ioctl structure to newer NIT structure
3373  */
3374 static int
mega_m_to_n(void __user * arg,nitioctl_t * uioc)3375 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3376 {
3377 	struct uioctl_t	uioc_mimd;
3378 	char	signature[8] = {0};
3379 	u8	opcode;
3380 	u8	subopcode;
3381 
3382 
3383 	/*
3384 	 * check is the application conforms to NIT. We do not have to do much
3385 	 * in that case.
3386 	 * We exploit the fact that the signature is stored in the very
3387 	 * beginning of the structure.
3388 	 */
3389 
3390 	if( copy_from_user(signature, arg, 7) )
3391 		return (-EFAULT);
3392 
3393 	if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3394 
3395 		/*
3396 		 * NOTE NOTE: The nit ioctl is still under flux because of
3397 		 * change of mailbox definition, in HPE. No applications yet
3398 		 * use this interface and let's not have applications use this
3399 		 * interface till the new specifitions are in place.
3400 		 */
3401 		return -EINVAL;
3402 #if 0
3403 		if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3404 			return (-EFAULT);
3405 		return 0;
3406 #endif
3407 	}
3408 
3409 	/*
3410 	 * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3411 	 *
3412 	 * Get the user ioctl structure
3413 	 */
3414 	if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3415 		return (-EFAULT);
3416 
3417 
3418 	/*
3419 	 * Get the opcode and subopcode for the commands
3420 	 */
3421 	opcode = uioc_mimd.ui.fcs.opcode;
3422 	subopcode = uioc_mimd.ui.fcs.subopcode;
3423 
3424 	switch (opcode) {
3425 	case 0x82:
3426 
3427 		switch (subopcode) {
3428 
3429 		case MEGAIOC_QDRVRVER:	/* Query driver version */
3430 			uioc->opcode = GET_DRIVER_VER;
3431 			uioc->uioc_uaddr = uioc_mimd.data;
3432 			break;
3433 
3434 		case MEGAIOC_QNADAP:	/* Get # of adapters */
3435 			uioc->opcode = GET_N_ADAP;
3436 			uioc->uioc_uaddr = uioc_mimd.data;
3437 			break;
3438 
3439 		case MEGAIOC_QADAPINFO:	/* Get adapter information */
3440 			uioc->opcode = GET_ADAP_INFO;
3441 			uioc->adapno = uioc_mimd.ui.fcs.adapno;
3442 			uioc->uioc_uaddr = uioc_mimd.data;
3443 			break;
3444 
3445 		default:
3446 			return(-EINVAL);
3447 		}
3448 
3449 		break;
3450 
3451 
3452 	case 0x81:
3453 
3454 		uioc->opcode = MBOX_CMD;
3455 		uioc->adapno = uioc_mimd.ui.fcs.adapno;
3456 
3457 		memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3458 
3459 		uioc->xferlen = uioc_mimd.ui.fcs.length;
3460 
3461 		if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3462 		if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3463 
3464 		break;
3465 
3466 	case 0x80:
3467 
3468 		uioc->opcode = MBOX_CMD;
3469 		uioc->adapno = uioc_mimd.ui.fcs.adapno;
3470 
3471 		memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3472 
3473 		/*
3474 		 * Choose the xferlen bigger of input and output data
3475 		 */
3476 		uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3477 			uioc_mimd.outlen : uioc_mimd.inlen;
3478 
3479 		if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3480 		if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3481 
3482 		break;
3483 
3484 	default:
3485 		return (-EINVAL);
3486 
3487 	}
3488 
3489 	return 0;
3490 }
3491 
3492 /*
3493  * mega_n_to_m()
3494  * @arg: user address
3495  * @mc: mailbox command
3496  *
3497  * Updates the status information to the application, depending on application
3498  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3499  */
3500 static int
mega_n_to_m(void __user * arg,megacmd_t * mc)3501 mega_n_to_m(void __user *arg, megacmd_t *mc)
3502 {
3503 	nitioctl_t	__user *uiocp;
3504 	megacmd_t	__user *umc;
3505 	mega_passthru	__user *upthru;
3506 	struct uioctl_t	__user *uioc_mimd;
3507 	char	signature[8] = {0};
3508 
3509 	/*
3510 	 * check is the application conforms to NIT.
3511 	 */
3512 	if( copy_from_user(signature, arg, 7) )
3513 		return -EFAULT;
3514 
3515 	if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3516 
3517 		uiocp = arg;
3518 
3519 		if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3520 			return (-EFAULT);
3521 
3522 		if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3523 
3524 			umc = MBOX_P(uiocp);
3525 
3526 			if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3527 				return -EFAULT;
3528 
3529 			if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3530 				return (-EFAULT);
3531 		}
3532 	}
3533 	else {
3534 		uioc_mimd = arg;
3535 
3536 		if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3537 			return (-EFAULT);
3538 
3539 		if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3540 
3541 			umc = (megacmd_t __user *)uioc_mimd->mbox;
3542 
3543 			if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3544 				return (-EFAULT);
3545 
3546 			if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3547 				return (-EFAULT);
3548 		}
3549 	}
3550 
3551 	return 0;
3552 }
3553 
3554 
3555 /*
3556  * MEGARAID 'FW' commands.
3557  */
3558 
3559 /**
3560  * mega_is_bios_enabled()
3561  * @adapter: pointer to our soft state
3562  *
3563  * issue command to find out if the BIOS is enabled for this controller
3564  */
3565 static int
mega_is_bios_enabled(adapter_t * adapter)3566 mega_is_bios_enabled(adapter_t *adapter)
3567 {
3568 	struct mbox_out mbox;
3569 	unsigned char	*raw_mbox = (u8 *)&mbox;
3570 
3571 	memset(&mbox, 0, sizeof(mbox));
3572 
3573 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3574 
3575 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3576 
3577 	raw_mbox[0] = IS_BIOS_ENABLED;
3578 	raw_mbox[2] = GET_BIOS;
3579 
3580 	issue_scb_block(adapter, raw_mbox);
3581 
3582 	return *(char *)adapter->mega_buffer;
3583 }
3584 
3585 
3586 /**
3587  * mega_enum_raid_scsi()
3588  * @adapter: pointer to our soft state
3589  *
3590  * Find out what channels are RAID/SCSI. This information is used to
3591  * differentiate the virtual channels and physical channels and to support
3592  * ROMB feature and non-disk devices.
3593  */
3594 static void
mega_enum_raid_scsi(adapter_t * adapter)3595 mega_enum_raid_scsi(adapter_t *adapter)
3596 {
3597 	struct mbox_out mbox;
3598 	unsigned char	*raw_mbox = (u8 *)&mbox;
3599 	int i;
3600 
3601 	memset(&mbox, 0, sizeof(mbox));
3602 
3603 	/*
3604 	 * issue command to find out what channels are raid/scsi
3605 	 */
3606 	raw_mbox[0] = CHNL_CLASS;
3607 	raw_mbox[2] = GET_CHNL_CLASS;
3608 
3609 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3610 
3611 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3612 
3613 	/*
3614 	 * Non-ROMB firmware fail this command, so all channels
3615 	 * must be shown RAID
3616 	 */
3617 	adapter->mega_ch_class = 0xFF;
3618 
3619 	if(!issue_scb_block(adapter, raw_mbox)) {
3620 		adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3621 
3622 	}
3623 
3624 	for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3625 		if( (adapter->mega_ch_class >> i) & 0x01 ) {
3626 			dev_info(&adapter->dev->dev, "channel[%d] is raid\n",
3627 					i);
3628 		}
3629 		else {
3630 			dev_info(&adapter->dev->dev, "channel[%d] is scsi\n",
3631 					i);
3632 		}
3633 	}
3634 
3635 	return;
3636 }
3637 
3638 
3639 /**
3640  * mega_get_boot_drv()
3641  * @adapter: pointer to our soft state
3642  *
3643  * Find out which device is the boot device. Note, any logical drive or any
3644  * phyical device (e.g., a CDROM) can be designated as a boot device.
3645  */
3646 static void
mega_get_boot_drv(adapter_t * adapter)3647 mega_get_boot_drv(adapter_t *adapter)
3648 {
3649 	struct private_bios_data	*prv_bios_data;
3650 	struct mbox_out mbox;
3651 	unsigned char	*raw_mbox = (u8 *)&mbox;
3652 	u16	cksum = 0;
3653 	u8	*cksum_p;
3654 	u8	boot_pdrv;
3655 	int	i;
3656 
3657 	memset(&mbox, 0, sizeof(mbox));
3658 
3659 	raw_mbox[0] = BIOS_PVT_DATA;
3660 	raw_mbox[2] = GET_BIOS_PVT_DATA;
3661 
3662 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3663 
3664 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3665 
3666 	adapter->boot_ldrv_enabled = 0;
3667 	adapter->boot_ldrv = 0;
3668 
3669 	adapter->boot_pdrv_enabled = 0;
3670 	adapter->boot_pdrv_ch = 0;
3671 	adapter->boot_pdrv_tgt = 0;
3672 
3673 	if(issue_scb_block(adapter, raw_mbox) == 0) {
3674 		prv_bios_data =
3675 			(struct private_bios_data *)adapter->mega_buffer;
3676 
3677 		cksum = 0;
3678 		cksum_p = (char *)prv_bios_data;
3679 		for (i = 0; i < 14; i++ ) {
3680 			cksum += (u16)(*cksum_p++);
3681 		}
3682 
3683 		if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3684 
3685 			/*
3686 			 * If MSB is set, a physical drive is set as boot
3687 			 * device
3688 			 */
3689 			if( prv_bios_data->boot_drv & 0x80 ) {
3690 				adapter->boot_pdrv_enabled = 1;
3691 				boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3692 				adapter->boot_pdrv_ch = boot_pdrv / 16;
3693 				adapter->boot_pdrv_tgt = boot_pdrv % 16;
3694 			}
3695 			else {
3696 				adapter->boot_ldrv_enabled = 1;
3697 				adapter->boot_ldrv = prv_bios_data->boot_drv;
3698 			}
3699 		}
3700 	}
3701 
3702 }
3703 
3704 /**
3705  * mega_support_random_del()
3706  * @adapter: pointer to our soft state
3707  *
3708  * Find out if this controller supports random deletion and addition of
3709  * logical drives
3710  */
3711 static int
mega_support_random_del(adapter_t * adapter)3712 mega_support_random_del(adapter_t *adapter)
3713 {
3714 	struct mbox_out mbox;
3715 	unsigned char	*raw_mbox = (u8 *)&mbox;
3716 	int rval;
3717 
3718 	memset(&mbox, 0, sizeof(mbox));
3719 
3720 	/*
3721 	 * issue command
3722 	 */
3723 	raw_mbox[0] = FC_DEL_LOGDRV;
3724 	raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3725 
3726 	rval = issue_scb_block(adapter, raw_mbox);
3727 
3728 	return !rval;
3729 }
3730 
3731 
3732 /**
3733  * mega_support_ext_cdb()
3734  * @adapter: pointer to our soft state
3735  *
3736  * Find out if this firmware support cdblen > 10
3737  */
3738 static int
mega_support_ext_cdb(adapter_t * adapter)3739 mega_support_ext_cdb(adapter_t *adapter)
3740 {
3741 	struct mbox_out mbox;
3742 	unsigned char	*raw_mbox = (u8 *)&mbox;
3743 	int rval;
3744 
3745 	memset(&mbox, 0, sizeof(mbox));
3746 	/*
3747 	 * issue command to find out if controller supports extended CDBs.
3748 	 */
3749 	raw_mbox[0] = 0xA4;
3750 	raw_mbox[2] = 0x16;
3751 
3752 	rval = issue_scb_block(adapter, raw_mbox);
3753 
3754 	return !rval;
3755 }
3756 
3757 
3758 /**
3759  * mega_del_logdrv()
3760  * @adapter: pointer to our soft state
3761  * @logdrv: logical drive to be deleted
3762  *
3763  * Delete the specified logical drive. It is the responsibility of the user
3764  * app to let the OS know about this operation.
3765  */
3766 static int
mega_del_logdrv(adapter_t * adapter,int logdrv)3767 mega_del_logdrv(adapter_t *adapter, int logdrv)
3768 {
3769 	unsigned long flags;
3770 	scb_t *scb;
3771 	int rval;
3772 
3773 	/*
3774 	 * Stop sending commands to the controller, queue them internally.
3775 	 * When deletion is complete, ISR will flush the queue.
3776 	 */
3777 	atomic_set(&adapter->quiescent, 1);
3778 
3779 	/*
3780 	 * Wait till all the issued commands are complete and there are no
3781 	 * commands in the pending queue
3782 	 */
3783 	while (atomic_read(&adapter->pend_cmds) > 0 ||
3784 	       !list_empty(&adapter->pending_list))
3785 		msleep(1000);	/* sleep for 1s */
3786 
3787 	rval = mega_do_del_logdrv(adapter, logdrv);
3788 
3789 	spin_lock_irqsave(&adapter->lock, flags);
3790 
3791 	/*
3792 	 * If delete operation was successful, add 0x80 to the logical drive
3793 	 * ids for commands in the pending queue.
3794 	 */
3795 	if (adapter->read_ldidmap) {
3796 		struct list_head *pos;
3797 		list_for_each(pos, &adapter->pending_list) {
3798 			scb = list_entry(pos, scb_t, list);
3799 			if (scb->pthru->logdrv < 0x80 )
3800 				scb->pthru->logdrv += 0x80;
3801 		}
3802 	}
3803 
3804 	atomic_set(&adapter->quiescent, 0);
3805 
3806 	mega_runpendq(adapter);
3807 
3808 	spin_unlock_irqrestore(&adapter->lock, flags);
3809 
3810 	return rval;
3811 }
3812 
3813 
3814 static int
mega_do_del_logdrv(adapter_t * adapter,int logdrv)3815 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3816 {
3817 	megacmd_t	mc;
3818 	int	rval;
3819 
3820 	memset( &mc, 0, sizeof(megacmd_t));
3821 
3822 	mc.cmd = FC_DEL_LOGDRV;
3823 	mc.opcode = OP_DEL_LOGDRV;
3824 	mc.subopcode = logdrv;
3825 
3826 	rval = mega_internal_command(adapter, &mc, NULL);
3827 
3828 	/* log this event */
3829 	if(rval) {
3830 		dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv);
3831 		return rval;
3832 	}
3833 
3834 	/*
3835 	 * After deleting first logical drive, the logical drives must be
3836 	 * addressed by adding 0x80 to the logical drive id.
3837 	 */
3838 	adapter->read_ldidmap = 1;
3839 
3840 	return rval;
3841 }
3842 
3843 
3844 /**
3845  * mega_get_max_sgl()
3846  * @adapter: pointer to our soft state
3847  *
3848  * Find out the maximum number of scatter-gather elements supported by this
3849  * version of the firmware
3850  */
3851 static void
mega_get_max_sgl(adapter_t * adapter)3852 mega_get_max_sgl(adapter_t *adapter)
3853 {
3854 	struct mbox_out	mbox;
3855 	unsigned char	*raw_mbox = (u8 *)&mbox;
3856 
3857 	memset(&mbox, 0, sizeof(mbox));
3858 
3859 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3860 
3861 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3862 
3863 	raw_mbox[0] = MAIN_MISC_OPCODE;
3864 	raw_mbox[2] = GET_MAX_SG_SUPPORT;
3865 
3866 
3867 	if( issue_scb_block(adapter, raw_mbox) ) {
3868 		/*
3869 		 * f/w does not support this command. Choose the default value
3870 		 */
3871 		adapter->sglen = MIN_SGLIST;
3872 	}
3873 	else {
3874 		adapter->sglen = *((char *)adapter->mega_buffer);
3875 
3876 		/*
3877 		 * Make sure this is not more than the resources we are
3878 		 * planning to allocate
3879 		 */
3880 		if ( adapter->sglen > MAX_SGLIST )
3881 			adapter->sglen = MAX_SGLIST;
3882 	}
3883 
3884 	return;
3885 }
3886 
3887 
3888 /**
3889  * mega_support_cluster()
3890  * @adapter: pointer to our soft state
3891  *
3892  * Find out if this firmware support cluster calls.
3893  */
3894 static int
mega_support_cluster(adapter_t * adapter)3895 mega_support_cluster(adapter_t *adapter)
3896 {
3897 	struct mbox_out	mbox;
3898 	unsigned char	*raw_mbox = (u8 *)&mbox;
3899 
3900 	memset(&mbox, 0, sizeof(mbox));
3901 
3902 	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3903 
3904 	mbox.xferaddr = (u32)adapter->buf_dma_handle;
3905 
3906 	/*
3907 	 * Try to get the initiator id. This command will succeed iff the
3908 	 * clustering is available on this HBA.
3909 	 */
3910 	raw_mbox[0] = MEGA_GET_TARGET_ID;
3911 
3912 	if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3913 
3914 		/*
3915 		 * Cluster support available. Get the initiator target id.
3916 		 * Tell our id to mid-layer too.
3917 		 */
3918 		adapter->this_id = *(u32 *)adapter->mega_buffer;
3919 		adapter->host->this_id = adapter->this_id;
3920 
3921 		return 1;
3922 	}
3923 
3924 	return 0;
3925 }
3926 
3927 #ifdef CONFIG_PROC_FS
3928 /**
3929  * mega_adapinq()
3930  * @adapter: pointer to our soft state
3931  * @dma_handle: DMA address of the buffer
3932  *
3933  * Issue internal commands while interrupts are available.
3934  * We only issue direct mailbox commands from within the driver. ioctl()
3935  * interface using these routines can issue passthru commands.
3936  */
3937 static int
mega_adapinq(adapter_t * adapter,dma_addr_t dma_handle)3938 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
3939 {
3940 	megacmd_t	mc;
3941 
3942 	memset(&mc, 0, sizeof(megacmd_t));
3943 
3944 	if( adapter->flag & BOARD_40LD ) {
3945 		mc.cmd = FC_NEW_CONFIG;
3946 		mc.opcode = NC_SUBOP_ENQUIRY3;
3947 		mc.subopcode = ENQ3_GET_SOLICITED_FULL;
3948 	}
3949 	else {
3950 		mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
3951 	}
3952 
3953 	mc.xferaddr = (u32)dma_handle;
3954 
3955 	if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
3956 		return -1;
3957 	}
3958 
3959 	return 0;
3960 }
3961 
3962 
3963 /**
3964  * mega_internal_dev_inquiry()
3965  * @adapter: pointer to our soft state
3966  * @ch: channel for this device
3967  * @tgt: ID of this device
3968  * @buf_dma_handle: DMA address of the buffer
3969  *
3970  * Issue the scsi inquiry for the specified device.
3971  */
3972 static int
mega_internal_dev_inquiry(adapter_t * adapter,u8 ch,u8 tgt,dma_addr_t buf_dma_handle)3973 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
3974 		dma_addr_t buf_dma_handle)
3975 {
3976 	mega_passthru	*pthru;
3977 	dma_addr_t	pthru_dma_handle;
3978 	megacmd_t	mc;
3979 	int		rval;
3980 	struct pci_dev	*pdev;
3981 
3982 
3983 	/*
3984 	 * For all internal commands, the buffer must be allocated in <4GB
3985 	 * address range
3986 	 */
3987 	if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
3988 
3989 	pthru = dma_alloc_coherent(&pdev->dev, sizeof(mega_passthru),
3990 				   &pthru_dma_handle, GFP_KERNEL);
3991 
3992 	if( pthru == NULL ) {
3993 		free_local_pdev(pdev);
3994 		return -1;
3995 	}
3996 
3997 	pthru->timeout = 2;
3998 	pthru->ars = 1;
3999 	pthru->reqsenselen = 14;
4000 	pthru->islogical = 0;
4001 
4002 	pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4003 
4004 	pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4005 
4006 	pthru->cdblen = 6;
4007 
4008 	pthru->cdb[0] = INQUIRY;
4009 	pthru->cdb[1] = 0;
4010 	pthru->cdb[2] = 0;
4011 	pthru->cdb[3] = 0;
4012 	pthru->cdb[4] = 255;
4013 	pthru->cdb[5] = 0;
4014 
4015 
4016 	pthru->dataxferaddr = (u32)buf_dma_handle;
4017 	pthru->dataxferlen = 256;
4018 
4019 	memset(&mc, 0, sizeof(megacmd_t));
4020 
4021 	mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4022 	mc.xferaddr = (u32)pthru_dma_handle;
4023 
4024 	rval = mega_internal_command(adapter, &mc, pthru);
4025 
4026 	dma_free_coherent(&pdev->dev, sizeof(mega_passthru), pthru,
4027 			  pthru_dma_handle);
4028 
4029 	free_local_pdev(pdev);
4030 
4031 	return rval;
4032 }
4033 #endif
4034 
4035 /**
4036  * mega_internal_command()
4037  * @adapter: pointer to our soft state
4038  * @mc: the mailbox command
4039  * @pthru: Passthru structure for DCDB commands
4040  *
4041  * Issue the internal commands in interrupt mode.
4042  * The last argument is the address of the passthru structure if the command
4043  * to be fired is a passthru command
4044  *
4045  * Note: parameter 'pthru' is null for non-passthru commands.
4046  */
4047 static int
mega_internal_command(adapter_t * adapter,megacmd_t * mc,mega_passthru * pthru)4048 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4049 {
4050 	unsigned long flags;
4051 	scb_t	*scb;
4052 	int	rval;
4053 
4054 	/*
4055 	 * The internal commands share one command id and hence are
4056 	 * serialized. This is so because we want to reserve maximum number of
4057 	 * available command ids for the I/O commands.
4058 	 */
4059 	mutex_lock(&adapter->int_mtx);
4060 
4061 	scb = &adapter->int_scb;
4062 	memset(scb, 0, sizeof(scb_t));
4063 
4064 	scb->idx = CMDID_INT_CMDS;
4065 	scb->state |= SCB_ACTIVE | SCB_PENDQ;
4066 
4067 	memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4068 
4069 	/*
4070 	 * Is it a passthru command
4071 	 */
4072 	if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4073 		scb->pthru = pthru;
4074 
4075 	spin_lock_irqsave(&adapter->lock, flags);
4076 	list_add_tail(&scb->list, &adapter->pending_list);
4077 	/*
4078 	 * Check if the HBA is in quiescent state, e.g., during a
4079 	 * delete logical drive opertion. If it is, don't run
4080 	 * the pending_list.
4081 	 */
4082 	if (atomic_read(&adapter->quiescent) == 0)
4083 		mega_runpendq(adapter);
4084 	spin_unlock_irqrestore(&adapter->lock, flags);
4085 
4086 	wait_for_completion(&adapter->int_waitq);
4087 
4088 	mc->status = rval = adapter->int_status;
4089 
4090 	/*
4091 	 * Print a debug message for all failed commands. Applications can use
4092 	 * this information.
4093 	 */
4094 	if (rval && trace_level) {
4095 		dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n",
4096 			mc->cmd, mc->opcode, mc->subopcode, rval);
4097 	}
4098 
4099 	mutex_unlock(&adapter->int_mtx);
4100 	return rval;
4101 }
4102 
4103 static struct scsi_host_template megaraid_template = {
4104 	.module				= THIS_MODULE,
4105 	.name				= "MegaRAID",
4106 	.proc_name			= "megaraid_legacy",
4107 	.info				= megaraid_info,
4108 	.queuecommand			= megaraid_queue,
4109 	.bios_param			= megaraid_biosparam,
4110 	.max_sectors			= MAX_SECTORS_PER_IO,
4111 	.can_queue			= MAX_COMMANDS,
4112 	.this_id			= DEFAULT_INITIATOR_ID,
4113 	.sg_tablesize			= MAX_SGLIST,
4114 	.cmd_per_lun			= DEF_CMD_PER_LUN,
4115 	.eh_abort_handler		= megaraid_abort,
4116 	.eh_device_reset_handler	= megaraid_reset,
4117 	.eh_bus_reset_handler		= megaraid_reset,
4118 	.eh_host_reset_handler		= megaraid_reset,
4119 	.no_write_same			= 1,
4120 	.cmd_size			= sizeof(struct megaraid_cmd_priv),
4121 };
4122 
4123 static int
megaraid_probe_one(struct pci_dev * pdev,const struct pci_device_id * id)4124 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4125 {
4126 	struct Scsi_Host *host;
4127 	adapter_t *adapter;
4128 	unsigned long mega_baseport, tbase, flag = 0;
4129 	u16 subsysid, subsysvid;
4130 	u8 pci_bus, pci_dev_func;
4131 	int irq, i, j;
4132 	int error = -ENODEV;
4133 
4134 	if (hba_count >= MAX_CONTROLLERS)
4135 		goto out;
4136 
4137 	if (pci_enable_device(pdev))
4138 		goto out;
4139 	pci_set_master(pdev);
4140 
4141 	pci_bus = pdev->bus->number;
4142 	pci_dev_func = pdev->devfn;
4143 
4144 	/*
4145 	 * The megaraid3 stuff reports the ID of the Intel part which is not
4146 	 * remotely specific to the megaraid
4147 	 */
4148 	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4149 		u16 magic;
4150 		/*
4151 		 * Don't fall over the Compaq management cards using the same
4152 		 * PCI identifier
4153 		 */
4154 		if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4155 		    pdev->subsystem_device == 0xC000)
4156 			goto out_disable_device;
4157 		/* Now check the magic signature byte */
4158 		pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4159 		if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4160 			goto out_disable_device;
4161 		/* Ok it is probably a megaraid */
4162 	}
4163 
4164 	/*
4165 	 * For these vendor and device ids, signature offsets are not
4166 	 * valid and 64 bit is implicit
4167 	 */
4168 	if (id->driver_data & BOARD_64BIT)
4169 		flag |= BOARD_64BIT;
4170 	else {
4171 		u32 magic64;
4172 
4173 		pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4174 		if (magic64 == HBA_SIGNATURE_64BIT)
4175 			flag |= BOARD_64BIT;
4176 	}
4177 
4178 	subsysvid = pdev->subsystem_vendor;
4179 	subsysid = pdev->subsystem_device;
4180 
4181 	dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n",
4182 		id->vendor, id->device);
4183 
4184 	/* Read the base port and IRQ from PCI */
4185 	mega_baseport = pci_resource_start(pdev, 0);
4186 	irq = pdev->irq;
4187 
4188 	tbase = mega_baseport;
4189 	if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4190 		flag |= BOARD_MEMMAP;
4191 
4192 		if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4193 			dev_warn(&pdev->dev, "mem region busy!\n");
4194 			goto out_disable_device;
4195 		}
4196 
4197 		mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4198 		if (!mega_baseport) {
4199 			dev_warn(&pdev->dev, "could not map hba memory\n");
4200 			goto out_release_region;
4201 		}
4202 	} else {
4203 		flag |= BOARD_IOMAP;
4204 		mega_baseport += 0x10;
4205 
4206 		if (!request_region(mega_baseport, 16, "megaraid"))
4207 			goto out_disable_device;
4208 	}
4209 
4210 	/* Initialize SCSI Host structure */
4211 	host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4212 	if (!host)
4213 		goto out_iounmap;
4214 
4215 	adapter = (adapter_t *)host->hostdata;
4216 	memset(adapter, 0, sizeof(adapter_t));
4217 
4218 	dev_notice(&pdev->dev,
4219 		"scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4220 		host->host_no, mega_baseport, irq);
4221 
4222 	adapter->base = mega_baseport;
4223 	if (flag & BOARD_MEMMAP)
4224 		adapter->mmio_base = (void __iomem *) mega_baseport;
4225 
4226 	INIT_LIST_HEAD(&adapter->free_list);
4227 	INIT_LIST_HEAD(&adapter->pending_list);
4228 	INIT_LIST_HEAD(&adapter->completed_list);
4229 
4230 	adapter->flag = flag;
4231 	spin_lock_init(&adapter->lock);
4232 
4233 	host->cmd_per_lun = max_cmd_per_lun;
4234 	host->max_sectors = max_sectors_per_io;
4235 
4236 	adapter->dev = pdev;
4237 	adapter->host = host;
4238 
4239 	adapter->host->irq = irq;
4240 
4241 	if (flag & BOARD_MEMMAP)
4242 		adapter->host->base = tbase;
4243 	else {
4244 		adapter->host->io_port = tbase;
4245 		adapter->host->n_io_port = 16;
4246 	}
4247 
4248 	adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4249 
4250 	/*
4251 	 * Allocate buffer to issue internal commands.
4252 	 */
4253 	adapter->mega_buffer = dma_alloc_coherent(&adapter->dev->dev,
4254 						  MEGA_BUFFER_SIZE,
4255 						  &adapter->buf_dma_handle,
4256 						  GFP_KERNEL);
4257 	if (!adapter->mega_buffer) {
4258 		dev_warn(&pdev->dev, "out of RAM\n");
4259 		goto out_host_put;
4260 	}
4261 
4262 	adapter->scb_list = kmalloc_array(MAX_COMMANDS, sizeof(scb_t),
4263 					  GFP_KERNEL);
4264 	if (!adapter->scb_list) {
4265 		dev_warn(&pdev->dev, "out of RAM\n");
4266 		goto out_free_cmd_buffer;
4267 	}
4268 
4269 	if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4270 				megaraid_isr_memmapped : megaraid_isr_iomapped,
4271 					IRQF_SHARED, "megaraid", adapter)) {
4272 		dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq);
4273 		goto out_free_scb_list;
4274 	}
4275 
4276 	if (mega_setup_mailbox(adapter))
4277 		goto out_free_irq;
4278 
4279 	if (mega_query_adapter(adapter))
4280 		goto out_free_mbox;
4281 
4282 	/*
4283 	 * Have checks for some buggy f/w
4284 	 */
4285 	if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4286 		/*
4287 		 * Which firmware
4288 		 */
4289 		if (!strcmp(adapter->fw_version, "3.00") ||
4290 				!strcmp(adapter->fw_version, "3.01")) {
4291 
4292 			dev_warn(&pdev->dev,
4293 				"Your card is a Dell PERC "
4294 				"2/SC RAID controller with "
4295 				"firmware\nmegaraid: 3.00 or 3.01.  "
4296 				"This driver is known to have "
4297 				"corruption issues\nmegaraid: with "
4298 				"those firmware versions on this "
4299 				"specific card.  In order\nmegaraid: "
4300 				"to protect your data, please upgrade "
4301 				"your firmware to version\nmegaraid: "
4302 				"3.10 or later, available from the "
4303 				"Dell Technical Support web\n"
4304 				"megaraid: site at\nhttp://support."
4305 				"dell.com/us/en/filelib/download/"
4306 				"index.asp?fileid=2940\n"
4307 			);
4308 		}
4309 	}
4310 
4311 	/*
4312 	 * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4313 	 * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4314 	 * support, since this firmware cannot handle 64 bit
4315 	 * addressing
4316 	 */
4317 	if ((subsysvid == PCI_VENDOR_ID_HP) &&
4318 	    ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4319 		/*
4320 		 * which firmware
4321 		 */
4322 		if (!strcmp(adapter->fw_version, "H01.07") ||
4323 		    !strcmp(adapter->fw_version, "H01.08") ||
4324 		    !strcmp(adapter->fw_version, "H01.09") ) {
4325 			dev_warn(&pdev->dev,
4326 				"Firmware H.01.07, "
4327 				"H.01.08, and H.01.09 on 1M/2M "
4328 				"controllers\n"
4329 				"do not support 64 bit "
4330 				"addressing.\nDISABLING "
4331 				"64 bit support.\n");
4332 			adapter->flag &= ~BOARD_64BIT;
4333 		}
4334 	}
4335 
4336 	if (mega_is_bios_enabled(adapter))
4337 		mega_hbas[hba_count].is_bios_enabled = 1;
4338 	mega_hbas[hba_count].hostdata_addr = adapter;
4339 
4340 	/*
4341 	 * Find out which channel is raid and which is scsi. This is
4342 	 * for ROMB support.
4343 	 */
4344 	mega_enum_raid_scsi(adapter);
4345 
4346 	/*
4347 	 * Find out if a logical drive is set as the boot drive. If
4348 	 * there is one, will make that as the first logical drive.
4349 	 * ROMB: Do we have to boot from a physical drive. Then all
4350 	 * the physical drives would appear before the logical disks.
4351 	 * Else, all the physical drives would be exported to the mid
4352 	 * layer after logical drives.
4353 	 */
4354 	mega_get_boot_drv(adapter);
4355 
4356 	if (adapter->boot_pdrv_enabled) {
4357 		j = adapter->product_info.nchannels;
4358 		for( i = 0; i < j; i++ )
4359 			adapter->logdrv_chan[i] = 0;
4360 		for( i = j; i < NVIRT_CHAN + j; i++ )
4361 			adapter->logdrv_chan[i] = 1;
4362 	} else {
4363 		for (i = 0; i < NVIRT_CHAN; i++)
4364 			adapter->logdrv_chan[i] = 1;
4365 		for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4366 			adapter->logdrv_chan[i] = 0;
4367 		adapter->mega_ch_class <<= NVIRT_CHAN;
4368 	}
4369 
4370 	/*
4371 	 * Do we support random deletion and addition of logical
4372 	 * drives
4373 	 */
4374 	adapter->read_ldidmap = 0;	/* set it after first logdrv
4375 						   delete cmd */
4376 	adapter->support_random_del = mega_support_random_del(adapter);
4377 
4378 	/* Initialize SCBs */
4379 	if (mega_init_scb(adapter))
4380 		goto out_free_mbox;
4381 
4382 	/*
4383 	 * Reset the pending commands counter
4384 	 */
4385 	atomic_set(&adapter->pend_cmds, 0);
4386 
4387 	/*
4388 	 * Reset the adapter quiescent flag
4389 	 */
4390 	atomic_set(&adapter->quiescent, 0);
4391 
4392 	hba_soft_state[hba_count] = adapter;
4393 
4394 	/*
4395 	 * Fill in the structure which needs to be passed back to the
4396 	 * application when it does an ioctl() for controller related
4397 	 * information.
4398 	 */
4399 	i = hba_count;
4400 
4401 	mcontroller[i].base = mega_baseport;
4402 	mcontroller[i].irq = irq;
4403 	mcontroller[i].numldrv = adapter->numldrv;
4404 	mcontroller[i].pcibus = pci_bus;
4405 	mcontroller[i].pcidev = id->device;
4406 	mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4407 	mcontroller[i].pciid = -1;
4408 	mcontroller[i].pcivendor = id->vendor;
4409 	mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4410 	mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4411 
4412 
4413 	/* Set the Mode of addressing to 64 bit if we can */
4414 	if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4415 		dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
4416 		adapter->has_64bit_addr = 1;
4417 	} else  {
4418 		dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
4419 		adapter->has_64bit_addr = 0;
4420 	}
4421 
4422 	mutex_init(&adapter->int_mtx);
4423 	init_completion(&adapter->int_waitq);
4424 
4425 	adapter->this_id = DEFAULT_INITIATOR_ID;
4426 	adapter->host->this_id = DEFAULT_INITIATOR_ID;
4427 
4428 #if MEGA_HAVE_CLUSTERING
4429 	/*
4430 	 * Is cluster support enabled on this controller
4431 	 * Note: In a cluster the HBAs ( the initiators ) will have
4432 	 * different target IDs and we cannot assume it to be 7. Call
4433 	 * to mega_support_cluster() will get the target ids also if
4434 	 * the cluster support is available
4435 	 */
4436 	adapter->has_cluster = mega_support_cluster(adapter);
4437 	if (adapter->has_cluster) {
4438 		dev_notice(&pdev->dev,
4439 			"Cluster driver, initiator id:%d\n",
4440 			adapter->this_id);
4441 	}
4442 #endif
4443 
4444 	pci_set_drvdata(pdev, host);
4445 
4446 	mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4447 
4448 	error = scsi_add_host(host, &pdev->dev);
4449 	if (error)
4450 		goto out_free_mbox;
4451 
4452 	scsi_scan_host(host);
4453 	hba_count++;
4454 	return 0;
4455 
4456  out_free_mbox:
4457 	dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4458 			  adapter->una_mbox64, adapter->una_mbox64_dma);
4459  out_free_irq:
4460 	free_irq(adapter->host->irq, adapter);
4461  out_free_scb_list:
4462 	kfree(adapter->scb_list);
4463  out_free_cmd_buffer:
4464 	dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4465 			  adapter->mega_buffer, adapter->buf_dma_handle);
4466  out_host_put:
4467 	scsi_host_put(host);
4468  out_iounmap:
4469 	if (flag & BOARD_MEMMAP)
4470 		iounmap((void *)mega_baseport);
4471  out_release_region:
4472 	if (flag & BOARD_MEMMAP)
4473 		release_mem_region(tbase, 128);
4474 	else
4475 		release_region(mega_baseport, 16);
4476  out_disable_device:
4477 	pci_disable_device(pdev);
4478  out:
4479 	return error;
4480 }
4481 
4482 static void
__megaraid_shutdown(adapter_t * adapter)4483 __megaraid_shutdown(adapter_t *adapter)
4484 {
4485 	u_char	raw_mbox[sizeof(struct mbox_out)];
4486 	mbox_t	*mbox = (mbox_t *)raw_mbox;
4487 	int	i;
4488 
4489 	/* Flush adapter cache */
4490 	memset(&mbox->m_out, 0, sizeof(raw_mbox));
4491 	raw_mbox[0] = FLUSH_ADAPTER;
4492 
4493 	free_irq(adapter->host->irq, adapter);
4494 
4495 	/* Issue a blocking (interrupts disabled) command to the card */
4496 	issue_scb_block(adapter, raw_mbox);
4497 
4498 	/* Flush disks cache */
4499 	memset(&mbox->m_out, 0, sizeof(raw_mbox));
4500 	raw_mbox[0] = FLUSH_SYSTEM;
4501 
4502 	/* Issue a blocking (interrupts disabled) command to the card */
4503 	issue_scb_block(adapter, raw_mbox);
4504 
4505 	if (atomic_read(&adapter->pend_cmds) > 0)
4506 		dev_warn(&adapter->dev->dev, "pending commands!!\n");
4507 
4508 	/*
4509 	 * Have a delibrate delay to make sure all the caches are
4510 	 * actually flushed.
4511 	 */
4512 	for (i = 0; i <= 10; i++)
4513 		mdelay(1000);
4514 }
4515 
4516 static void
megaraid_remove_one(struct pci_dev * pdev)4517 megaraid_remove_one(struct pci_dev *pdev)
4518 {
4519 	struct Scsi_Host *host = pci_get_drvdata(pdev);
4520 	adapter_t *adapter = (adapter_t *)host->hostdata;
4521 	char buf[12] = { 0 };
4522 
4523 	scsi_remove_host(host);
4524 
4525 	__megaraid_shutdown(adapter);
4526 
4527 	/* Free our resources */
4528 	if (adapter->flag & BOARD_MEMMAP) {
4529 		iounmap((void *)adapter->base);
4530 		release_mem_region(adapter->host->base, 128);
4531 	} else
4532 		release_region(adapter->base, 16);
4533 
4534 	mega_free_sgl(adapter);
4535 
4536 	sprintf(buf, "hba%d", adapter->host->host_no);
4537 	remove_proc_subtree(buf, mega_proc_dir_entry);
4538 
4539 	dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4540 			  adapter->mega_buffer, adapter->buf_dma_handle);
4541 	kfree(adapter->scb_list);
4542 	dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4543 			  adapter->una_mbox64, adapter->una_mbox64_dma);
4544 
4545 	scsi_host_put(host);
4546 	pci_disable_device(pdev);
4547 
4548 	hba_count--;
4549 }
4550 
4551 static void
megaraid_shutdown(struct pci_dev * pdev)4552 megaraid_shutdown(struct pci_dev *pdev)
4553 {
4554 	struct Scsi_Host *host = pci_get_drvdata(pdev);
4555 	adapter_t *adapter = (adapter_t *)host->hostdata;
4556 
4557 	__megaraid_shutdown(adapter);
4558 }
4559 
4560 static struct pci_device_id megaraid_pci_tbl[] = {
4561 	{PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4562 		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4563 	{PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4564 		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4565 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4566 		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4567 	{0,}
4568 };
4569 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4570 
4571 static struct pci_driver megaraid_pci_driver = {
4572 	.name		= "megaraid_legacy",
4573 	.id_table	= megaraid_pci_tbl,
4574 	.probe		= megaraid_probe_one,
4575 	.remove		= megaraid_remove_one,
4576 	.shutdown	= megaraid_shutdown,
4577 };
4578 
megaraid_init(void)4579 static int __init megaraid_init(void)
4580 {
4581 	int error;
4582 
4583 	if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4584 		max_cmd_per_lun = MAX_CMD_PER_LUN;
4585 	if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4586 		max_mbox_busy_wait = MBOX_BUSY_WAIT;
4587 
4588 #ifdef CONFIG_PROC_FS
4589 	mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4590 	if (!mega_proc_dir_entry) {
4591 		printk(KERN_WARNING
4592 				"megaraid: failed to create megaraid root\n");
4593 	}
4594 #endif
4595 	error = pci_register_driver(&megaraid_pci_driver);
4596 	if (error) {
4597 #ifdef CONFIG_PROC_FS
4598 		remove_proc_entry("megaraid", NULL);
4599 #endif
4600 		return error;
4601 	}
4602 
4603 	/*
4604 	 * Register the driver as a character device, for applications
4605 	 * to access it for ioctls.
4606 	 * First argument (major) to register_chrdev implies a dynamic
4607 	 * major number allocation.
4608 	 */
4609 	major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4610 	if (major < 0) {
4611 		printk(KERN_WARNING
4612 				"megaraid: failed to register char device\n");
4613 	}
4614 
4615 	return 0;
4616 }
4617 
megaraid_exit(void)4618 static void __exit megaraid_exit(void)
4619 {
4620 	/*
4621 	 * Unregister the character device interface to the driver.
4622 	 */
4623 	unregister_chrdev(major, "megadev_legacy");
4624 
4625 	pci_unregister_driver(&megaraid_pci_driver);
4626 
4627 #ifdef CONFIG_PROC_FS
4628 	remove_proc_entry("megaraid", NULL);
4629 #endif
4630 }
4631 
4632 module_init(megaraid_init);
4633 module_exit(megaraid_exit);
4634 
4635 /* vi: set ts=8 sw=8 tw=78: */
4636