Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/scsi/megaraid.c

  1 /*
  2  *
  3  *                      Linux MegaRAID device driver
  4  *
  5  * Copyright (c) 2002  LSI Logic Corporation.
  6  *
  7  *         This program is free software; you can redistribute it and/or
  8  *         modify it under the terms of the GNU General Public License
  9  *         as published by the Free Software Foundation; either version
 10  *         2 of the License, or (at your option) any later version.
 11  *
 12  * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
 13  *        - fixes
 14  *        - speed-ups (list handling fixes, issued_list, optimizations.)
 15  *        - lots of cleanups.
 16  *
 17  * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
 18  *        - new-style, hotplug-aware pci probing and scsi registration
 19  *
 20  * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
 21  *                                              <Seokmann.Ju@lsil.com>
 22  *
 23  * Description: Linux device driver for LSI Logic MegaRAID controller
 24  *
 25  * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
 26  *                                      518, 520, 531, 532
 27  *
 28  * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
 29  * and others. Please send updates to the mailing list
 30  * linux-scsi@vger.kernel.org .
 31  *
 32  */
 33 
 34 #include <linux/mm.h>
 35 #include <linux/fs.h>
 36 #include <linux/blkdev.h>
 37 #include <asm/uaccess.h>
 38 #include <asm/io.h>
 39 #include <linux/completion.h>
 40 #include <linux/delay.h>
 41 #include <linux/proc_fs.h>
 42 #include <linux/seq_file.h>
 43 #include <linux/reboot.h>
 44 #include <linux/module.h>
 45 #include <linux/list.h>
 46 #include <linux/interrupt.h>
 47 #include <linux/pci.h>
 48 #include <linux/init.h>
 49 #include <linux/dma-mapping.h>
 50 #include <linux/mutex.h>
 51 #include <linux/slab.h>
 52 #include <scsi/scsicam.h>
 53 
 54 #include "scsi.h"
 55 #include <scsi/scsi_host.h>
 56 
 57 #include "megaraid.h"
 58 
 59 #define MEGARAID_MODULE_VERSION "2.00.4"
 60 
 61 MODULE_AUTHOR ("sju@lsil.com");
 62 MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
 63 MODULE_LICENSE ("GPL");
 64 MODULE_VERSION(MEGARAID_MODULE_VERSION);
 65 
 66 static DEFINE_MUTEX(megadev_mutex);
 67 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
 68 module_param(max_cmd_per_lun, uint, 0);
 69 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)");
 70 
 71 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
 72 module_param(max_sectors_per_io, ushort, 0);
 73 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
 74 
 75 
 76 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
 77 module_param(max_mbox_busy_wait, ushort, 0);
 78 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
 79 
 80 #define RDINDOOR(adapter)       readl((adapter)->mmio_base + 0x20)
 81 #define RDOUTDOOR(adapter)      readl((adapter)->mmio_base + 0x2C)
 82 #define WRINDOOR(adapter,value)  writel(value, (adapter)->mmio_base + 0x20)
 83 #define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
 84 
 85 /*
 86  * Global variables
 87  */
 88 
 89 static int hba_count;
 90 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
 91 static struct proc_dir_entry *mega_proc_dir_entry;
 92 
 93 /* For controller re-ordering */
 94 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
 95 
 96 static long
 97 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 98 
 99 /*
100  * The File Operations structure for the serial/ioctl interface of the driver
101  */
102 static const struct file_operations megadev_fops = {
103         .owner          = THIS_MODULE,
104         .unlocked_ioctl = megadev_unlocked_ioctl,
105         .open           = megadev_open,
106         .llseek         = noop_llseek,
107 };
108 
109 /*
110  * Array to structures for storing the information about the controllers. This
111  * information is sent to the user level applications, when they do an ioctl
112  * for this information.
113  */
114 static struct mcontroller mcontroller[MAX_CONTROLLERS];
115 
116 /* The current driver version */
117 static u32 driver_ver = 0x02000000;
118 
119 /* major number used by the device for character interface */
120 static int major;
121 
122 #define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
123 
124 
125 /*
126  * Debug variable to print some diagnostic messages
127  */
128 static int trace_level;
129 
130 /**
131  * mega_setup_mailbox()
132  * @adapter - pointer to our soft state
133  *
134  * Allocates a 8 byte aligned memory for the handshake mailbox.
135  */
136 static int
137 mega_setup_mailbox(adapter_t *adapter)
138 {
139         unsigned long   align;
140 
141         adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
142                         sizeof(mbox64_t), &adapter->una_mbox64_dma);
143 
144         if( !adapter->una_mbox64 ) return -1;
145                 
146         adapter->mbox = &adapter->una_mbox64->mbox;
147 
148         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
149                         (~0UL ^ 0xFUL));
150 
151         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
152 
153         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
154 
155         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
156 
157         /*
158          * Register the mailbox if the controller is an io-mapped controller
159          */
160         if( adapter->flag & BOARD_IOMAP ) {
161 
162                 outb(adapter->mbox_dma & 0xFF,
163                                 adapter->host->io_port + MBOX_PORT0);
164 
165                 outb((adapter->mbox_dma >> 8) & 0xFF,
166                                 adapter->host->io_port + MBOX_PORT1);
167 
168                 outb((adapter->mbox_dma >> 16) & 0xFF,
169                                 adapter->host->io_port + MBOX_PORT2);
170 
171                 outb((adapter->mbox_dma >> 24) & 0xFF,
172                                 adapter->host->io_port + MBOX_PORT3);
173 
174                 outb(ENABLE_MBOX_BYTE,
175                                 adapter->host->io_port + ENABLE_MBOX_REGION);
176 
177                 irq_ack(adapter);
178 
179                 irq_enable(adapter);
180         }
181 
182         return 0;
183 }
184 
185 
186 /*
187  * mega_query_adapter()
188  * @adapter - pointer to our soft state
189  *
190  * Issue the adapter inquiry commands to the controller and find out
191  * information and parameter about the devices attached
192  */
193 static int
194 mega_query_adapter(adapter_t *adapter)
195 {
196         dma_addr_t      prod_info_dma_handle;
197         mega_inquiry3   *inquiry3;
198         u8      raw_mbox[sizeof(struct mbox_out)];
199         mbox_t  *mbox;
200         int     retval;
201 
202         /* Initialize adapter inquiry mailbox */
203 
204         mbox = (mbox_t *)raw_mbox;
205 
206         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
207         memset(&mbox->m_out, 0, sizeof(raw_mbox));
208 
209         /*
210          * Try to issue Inquiry3 command
211          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
212          * update enquiry3 structure
213          */
214         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
215 
216         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
217 
218         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
219         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
220         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
221 
222         /* Issue a blocking command to the card */
223         if ((retval = issue_scb_block(adapter, raw_mbox))) {
224                 /* the adapter does not support 40ld */
225 
226                 mraid_ext_inquiry       *ext_inq;
227                 mraid_inquiry           *inq;
228                 dma_addr_t              dma_handle;
229 
230                 ext_inq = pci_alloc_consistent(adapter->dev,
231                                 sizeof(mraid_ext_inquiry), &dma_handle);
232 
233                 if( ext_inq == NULL ) return -1;
234 
235                 inq = &ext_inq->raid_inq;
236 
237                 mbox->m_out.xferaddr = (u32)dma_handle;
238 
239                 /*issue old 0x04 command to adapter */
240                 mbox->m_out.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                 pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
252                                 ext_inq, dma_handle);
253 
254         } else {                /*adapter supports 40ld */
255                 adapter->flag |= BOARD_40LD;
256 
257                 /*
258                  * get product_info, which is static information and will be
259                  * unchanged
260                  */
261                 prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
262                                 &adapter->product_info,
263                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
264 
265                 mbox->m_out.xferaddr = prod_info_dma_handle;
266 
267                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
268                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
269 
270                 if ((retval = issue_scb_block(adapter, raw_mbox)))
271                         printk(KERN_WARNING
272                         "megaraid: Product_info cmd failed with error: %d\n",
273                                 retval);
274 
275                 pci_unmap_single(adapter->dev, prod_info_dma_handle,
276                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
277         }
278 
279 
280         /*
281          * kernel scans the channels from 0 to <= max_channel
282          */
283         adapter->host->max_channel =
284                 adapter->product_info.nchannels + NVIRT_CHAN -1;
285 
286         adapter->host->max_id = 16;     /* max targets per channel */
287 
288         adapter->host->max_lun = 7;     /* Up to 7 luns for non disk devices */
289 
290         adapter->host->cmd_per_lun = max_cmd_per_lun;
291 
292         adapter->numldrv = inquiry3->num_ldrv;
293 
294         adapter->max_cmds = adapter->product_info.max_commands;
295 
296         if(adapter->max_cmds > MAX_COMMANDS)
297                 adapter->max_cmds = MAX_COMMANDS;
298 
299         adapter->host->can_queue = adapter->max_cmds - 1;
300 
301         /*
302          * Get the maximum number of scatter-gather elements supported by this
303          * firmware
304          */
305         mega_get_max_sgl(adapter);
306 
307         adapter->host->sg_tablesize = adapter->sglen;
308 
309         /* use HP firmware and bios version encoding
310            Note: fw_version[0|1] and bios_version[0|1] were originally shifted
311            right 8 bits making them zero. This 0 value was hardcoded to fix
312            sparse warnings. */
313         if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
314                 sprintf (adapter->fw_version, "%c%d%d.%d%d",
315                          adapter->product_info.fw_version[2],
316                          0,
317                          adapter->product_info.fw_version[1] & 0x0f,
318                          0,
319                          adapter->product_info.fw_version[0] & 0x0f);
320                 sprintf (adapter->bios_version, "%c%d%d.%d%d",
321                          adapter->product_info.bios_version[2],
322                          0,
323                          adapter->product_info.bios_version[1] & 0x0f,
324                          0,
325                          adapter->product_info.bios_version[0] & 0x0f);
326         } else {
327                 memcpy(adapter->fw_version,
328                                 (char *)adapter->product_info.fw_version, 4);
329                 adapter->fw_version[4] = 0;
330 
331                 memcpy(adapter->bios_version,
332                                 (char *)adapter->product_info.bios_version, 4);
333 
334                 adapter->bios_version[4] = 0;
335         }
336 
337         printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
338                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
339 
340         /*
341          * Do we support extended (>10 bytes) cdbs
342          */
343         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
344         if (adapter->support_ext_cdb)
345                 printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
346 
347 
348         return 0;
349 }
350 
351 /**
352  * mega_runpendq()
353  * @adapter - pointer to our soft state
354  *
355  * Runs through the list of pending requests.
356  */
357 static inline void
358 mega_runpendq(adapter_t *adapter)
359 {
360         if(!list_empty(&adapter->pending_list))
361                 __mega_runpendq(adapter);
362 }
363 
364 /*
365  * megaraid_queue()
366  * @scmd - Issue this scsi command
367  * @done - the callback hook into the scsi mid-layer
368  *
369  * The command queuing entry point for the mid-layer.
370  */
371 static int
372 megaraid_queue_lck(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
373 {
374         adapter_t       *adapter;
375         scb_t   *scb;
376         int     busy=0;
377         unsigned long flags;
378 
379         adapter = (adapter_t *)scmd->device->host->hostdata;
380 
381         scmd->scsi_done = done;
382 
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 
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, 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
458 mega_get_ldrv_num(adapter_t *adapter, 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:    /* fall through */
498                 case WRITE_6:   /* fall through */
499                 case READ_10:   /* fall through */
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 *
521 mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
522 {
523         mega_ext_passthru       *epthru;
524         mega_passthru   *pthru;
525         scb_t   *scb;
526         mbox_t  *mbox;
527         u32     seg;
528         char    islogical;
529         int     max_ldrv_num;
530         int     channel = 0;
531         int     target = 0;
532         int     ldrv_num = 0;   /* logical drive number */
533 
534         /*
535          * We know what channels our logical drives are on - mega_find_card()
536          */
537         islogical = adapter->logdrv_chan[cmd->device->channel];
538 
539         /*
540          * The theory: If physical drive is chosen for boot, all the physical
541          * devices are exported before the logical drives, otherwise physical
542          * devices are pushed after logical drives, in which case - Kernel sees
543          * the physical devices on virtual channel which is obviously converted
544          * to actual channel on the HBA.
545          */
546         if( adapter->boot_pdrv_enabled ) {
547                 if( islogical ) {
548                         /* logical channel */
549                         channel = cmd->device->channel -
550                                 adapter->product_info.nchannels;
551                 }
552                 else {
553                         /* this is physical channel */
554                         channel = cmd->device->channel; 
555                         target = cmd->device->id;
556 
557                         /*
558                          * boot from a physical disk, that disk needs to be
559                          * exposed first IF both the channels are SCSI, then
560                          * booting from the second channel is not allowed.
561                          */
562                         if( target == 0 ) {
563                                 target = adapter->boot_pdrv_tgt;
564                         }
565                         else if( target == adapter->boot_pdrv_tgt ) {
566                                 target = 0;
567                         }
568                 }
569         }
570         else {
571                 if( islogical ) {
572                         /* this is the logical channel */
573                         channel = cmd->device->channel; 
574                 }
575                 else {
576                         /* physical channel */
577                         channel = cmd->device->channel - NVIRT_CHAN;    
578                         target = cmd->device->id;
579                 }
580         }
581 
582 
583         if(islogical) {
584 
585                 /* have just LUN 0 for each target on virtual channels */
586                 if (cmd->device->lun) {
587                         cmd->result = (DID_BAD_TARGET << 16);
588                         cmd->scsi_done(cmd);
589                         return NULL;
590                 }
591 
592                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
593 
594 
595                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
596                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
597 
598                 /*
599                  * max_ldrv_num increases by 0x80 if some logical drive was
600                  * deleted.
601                  */
602                 if(adapter->read_ldidmap)
603                         max_ldrv_num += 0x80;
604 
605                 if(ldrv_num > max_ldrv_num ) {
606                         cmd->result = (DID_BAD_TARGET << 16);
607                         cmd->scsi_done(cmd);
608                         return NULL;
609                 }
610 
611         }
612         else {
613                 if( cmd->device->lun > 7) {
614                         /*
615                          * Do not support lun >7 for physically accessed
616                          * devices
617                          */
618                         cmd->result = (DID_BAD_TARGET << 16);
619                         cmd->scsi_done(cmd);
620                         return NULL;
621                 }
622         }
623 
624         /*
625          *
626          * Logical drive commands
627          *
628          */
629         if(islogical) {
630                 switch (cmd->cmnd[0]) {
631                 case TEST_UNIT_READY:
632 #if MEGA_HAVE_CLUSTERING
633                         /*
634                          * Do we support clustering and is the support enabled
635                          * If no, return success always
636                          */
637                         if( !adapter->has_cluster ) {
638                                 cmd->result = (DID_OK << 16);
639                                 cmd->scsi_done(cmd);
640                                 return NULL;
641                         }
642 
643                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
644                                 *busy = 1;
645                                 return NULL;
646                         }
647 
648                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
649                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
650                         scb->raw_mbox[3] = ldrv_num;
651 
652                         scb->dma_direction = PCI_DMA_NONE;
653 
654                         return scb;
655 #else
656                         cmd->result = (DID_OK << 16);
657                         cmd->scsi_done(cmd);
658                         return NULL;
659 #endif
660 
661                 case MODE_SENSE: {
662                         char *buf;
663                         struct scatterlist *sg;
664 
665                         sg = scsi_sglist(cmd);
666                         buf = kmap_atomic(sg_page(sg)) + sg->offset;
667 
668                         memset(buf, 0, cmd->cmnd[4]);
669                         kunmap_atomic(buf - sg->offset);
670 
671                         cmd->result = (DID_OK << 16);
672                         cmd->scsi_done(cmd);
673                         return NULL;
674                 }
675 
676                 case READ_CAPACITY:
677                 case INQUIRY:
678 
679                         if(!(adapter->flag & (1L << cmd->device->channel))) {
680 
681                                 printk(KERN_NOTICE
682                                         "scsi%d: scanning scsi channel %d ",
683                                                 adapter->host->host_no,
684                                                 cmd->device->channel);
685                                 printk("for logical drives.\n");
686 
687                                 adapter->flag |= (1L << cmd->device->channel);
688                         }
689 
690                         /* Allocate a SCB and initialize passthru */
691                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
692                                 *busy = 1;
693                                 return NULL;
694                         }
695                         pthru = scb->pthru;
696 
697                         mbox = (mbox_t *)scb->raw_mbox;
698                         memset(mbox, 0, sizeof(scb->raw_mbox));
699                         memset(pthru, 0, sizeof(mega_passthru));
700 
701                         pthru->timeout = 0;
702                         pthru->ars = 1;
703                         pthru->reqsenselen = 14;
704                         pthru->islogical = 1;
705                         pthru->logdrv = ldrv_num;
706                         pthru->cdblen = cmd->cmd_len;
707                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
708 
709                         if( adapter->has_64bit_addr ) {
710                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
711                         }
712                         else {
713                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
714                         }
715 
716                         scb->dma_direction = PCI_DMA_FROMDEVICE;
717 
718                         pthru->numsgelements = mega_build_sglist(adapter, scb,
719                                 &pthru->dataxferaddr, &pthru->dataxferlen);
720 
721                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
722 
723                         return scb;
724 
725                 case READ_6:
726                 case WRITE_6:
727                 case READ_10:
728                 case WRITE_10:
729                 case READ_12:
730                 case WRITE_12:
731 
732                         /* Allocate a SCB and initialize mailbox */
733                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
734                                 *busy = 1;
735                                 return NULL;
736                         }
737                         mbox = (mbox_t *)scb->raw_mbox;
738 
739                         memset(mbox, 0, sizeof(scb->raw_mbox));
740                         mbox->m_out.logdrv = ldrv_num;
741 
742                         /*
743                          * A little hack: 2nd bit is zero for all scsi read
744                          * commands and is set for all scsi write commands
745                          */
746                         if( adapter->has_64bit_addr ) {
747                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
748                                         MEGA_MBOXCMD_LWRITE64:
749                                         MEGA_MBOXCMD_LREAD64 ;
750                         }
751                         else {
752                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
753                                         MEGA_MBOXCMD_LWRITE:
754                                         MEGA_MBOXCMD_LREAD ;
755                         }
756 
757                         /*
758                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
759                          */
760                         if( cmd->cmd_len == 6 ) {
761                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
762                                 mbox->m_out.lba =
763                                         ((u32)cmd->cmnd[1] << 16) |
764                                         ((u32)cmd->cmnd[2] << 8) |
765                                         (u32)cmd->cmnd[3];
766 
767                                 mbox->m_out.lba &= 0x1FFFFF;
768 
769 #if MEGA_HAVE_STATS
770                                 /*
771                                  * Take modulo 0x80, since the logical drive
772                                  * number increases by 0x80 when a logical
773                                  * drive was deleted
774                                  */
775                                 if (*cmd->cmnd == READ_6) {
776                                         adapter->nreads[ldrv_num%0x80]++;
777                                         adapter->nreadblocks[ldrv_num%0x80] +=
778                                                 mbox->m_out.numsectors;
779                                 } else {
780                                         adapter->nwrites[ldrv_num%0x80]++;
781                                         adapter->nwriteblocks[ldrv_num%0x80] +=
782                                                 mbox->m_out.numsectors;
783                                 }
784 #endif
785                         }
786 
787                         /*
788                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
789                          */
790                         if( cmd->cmd_len == 10 ) {
791                                 mbox->m_out.numsectors =
792                                         (u32)cmd->cmnd[8] |
793                                         ((u32)cmd->cmnd[7] << 8);
794                                 mbox->m_out.lba =
795                                         ((u32)cmd->cmnd[2] << 24) |
796                                         ((u32)cmd->cmnd[3] << 16) |
797                                         ((u32)cmd->cmnd[4] << 8) |
798                                         (u32)cmd->cmnd[5];
799 
800 #if MEGA_HAVE_STATS
801                                 if (*cmd->cmnd == READ_10) {
802                                         adapter->nreads[ldrv_num%0x80]++;
803                                         adapter->nreadblocks[ldrv_num%0x80] +=
804                                                 mbox->m_out.numsectors;
805                                 } else {
806                                         adapter->nwrites[ldrv_num%0x80]++;
807                                         adapter->nwriteblocks[ldrv_num%0x80] +=
808                                                 mbox->m_out.numsectors;
809                                 }
810 #endif
811                         }
812 
813                         /*
814                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
815                          */
816                         if( cmd->cmd_len == 12 ) {
817                                 mbox->m_out.lba =
818                                         ((u32)cmd->cmnd[2] << 24) |
819                                         ((u32)cmd->cmnd[3] << 16) |
820                                         ((u32)cmd->cmnd[4] << 8) |
821                                         (u32)cmd->cmnd[5];
822 
823                                 mbox->m_out.numsectors =
824                                         ((u32)cmd->cmnd[6] << 24) |
825                                         ((u32)cmd->cmnd[7] << 16) |
826                                         ((u32)cmd->cmnd[8] << 8) |
827                                         (u32)cmd->cmnd[9];
828 
829 #if MEGA_HAVE_STATS
830                                 if (*cmd->cmnd == READ_12) {
831                                         adapter->nreads[ldrv_num%0x80]++;
832                                         adapter->nreadblocks[ldrv_num%0x80] +=
833                                                 mbox->m_out.numsectors;
834                                 } else {
835                                         adapter->nwrites[ldrv_num%0x80]++;
836                                         adapter->nwriteblocks[ldrv_num%0x80] +=
837                                                 mbox->m_out.numsectors;
838                                 }
839 #endif
840                         }
841 
842                         /*
843                          * If it is a read command
844                          */
845                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
846                                 scb->dma_direction = PCI_DMA_FROMDEVICE;
847                         }
848                         else {
849                                 scb->dma_direction = PCI_DMA_TODEVICE;
850                         }
851 
852                         /* Calculate Scatter-Gather info */
853                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
854                                         (u32 *)&mbox->m_out.xferaddr, &seg);
855 
856                         return scb;
857 
858 #if MEGA_HAVE_CLUSTERING
859                 case RESERVE:   /* Fall through */
860                 case RELEASE:
861 
862                         /*
863                          * Do we support clustering and is the support enabled
864                          */
865                         if( ! adapter->has_cluster ) {
866 
867                                 cmd->result = (DID_BAD_TARGET << 16);
868                                 cmd->scsi_done(cmd);
869                                 return NULL;
870                         }
871 
872                         /* Allocate a SCB and initialize mailbox */
873                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
874                                 *busy = 1;
875                                 return NULL;
876                         }
877 
878                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
879                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
880                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
881 
882                         scb->raw_mbox[3] = ldrv_num;
883 
884                         scb->dma_direction = PCI_DMA_NONE;
885 
886                         return scb;
887 #endif
888 
889                 default:
890                         cmd->result = (DID_BAD_TARGET << 16);
891                         cmd->scsi_done(cmd);
892                         return NULL;
893                 }
894         }
895 
896         /*
897          * Passthru drive commands
898          */
899         else {
900                 /* Allocate a SCB and initialize passthru */
901                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
902                         *busy = 1;
903                         return NULL;
904                 }
905 
906                 mbox = (mbox_t *)scb->raw_mbox;
907                 memset(mbox, 0, sizeof(scb->raw_mbox));
908 
909                 if( adapter->support_ext_cdb ) {
910 
911                         epthru = mega_prepare_extpassthru(adapter, scb, cmd,
912                                         channel, target);
913 
914                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
915 
916                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
917 
918                 }
919                 else {
920 
921                         pthru = mega_prepare_passthru(adapter, scb, cmd,
922                                         channel, target);
923 
924                         /* Initialize mailbox */
925                         if( adapter->has_64bit_addr ) {
926                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
927                         }
928                         else {
929                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
930                         }
931 
932                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
933 
934                 }
935                 return scb;
936         }
937         return NULL;
938 }
939 
940 
941 /**
942  * mega_prepare_passthru()
943  * @adapter - pointer to our soft state
944  * @scb - our scsi control block
945  * @cmd - scsi command from the mid-layer
946  * @channel - actual channel on the controller
947  * @target - actual id on the controller.
948  *
949  * prepare a command for the scsi physical devices.
950  */
951 static mega_passthru *
952 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
953                 int channel, int target)
954 {
955         mega_passthru *pthru;
956 
957         pthru = scb->pthru;
958         memset(pthru, 0, sizeof (mega_passthru));
959 
960         /* 0=6sec/1=60sec/2=10min/3=3hrs */
961         pthru->timeout = 2;
962 
963         pthru->ars = 1;
964         pthru->reqsenselen = 14;
965         pthru->islogical = 0;
966 
967         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
968 
969         pthru->target = (adapter->flag & BOARD_40LD) ?
970                 (channel << 4) | target : target;
971 
972         pthru->cdblen = cmd->cmd_len;
973         pthru->logdrv = cmd->device->lun;
974 
975         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
976 
977         /* Not sure about the direction */
978         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
979 
980         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
981         switch (cmd->cmnd[0]) {
982         case INQUIRY:
983         case READ_CAPACITY:
984                 if(!(adapter->flag & (1L << cmd->device->channel))) {
985 
986                         printk(KERN_NOTICE
987                                 "scsi%d: scanning scsi channel %d [P%d] ",
988                                         adapter->host->host_no,
989                                         cmd->device->channel, channel);
990                         printk("for physical devices.\n");
991 
992                         adapter->flag |= (1L << cmd->device->channel);
993                 }
994                 /* Fall through */
995         default:
996                 pthru->numsgelements = mega_build_sglist(adapter, scb,
997                                 &pthru->dataxferaddr, &pthru->dataxferlen);
998                 break;
999         }
1000         return pthru;
1001 }
1002 
1003 
1004 /**
1005  * mega_prepare_extpassthru()
1006  * @adapter - pointer to our soft state
1007  * @scb - our scsi control block
1008  * @cmd - scsi command from the mid-layer
1009  * @channel - actual channel on the controller
1010  * @target - actual id on the controller.
1011  *
1012  * prepare a command for the scsi physical devices. This rountine prepares
1013  * commands for devices which can take extended CDBs (>10 bytes)
1014  */
1015 static mega_ext_passthru *
1016 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, 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 = PCI_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                         printk(KERN_NOTICE
1049                                 "scsi%d: scanning scsi channel %d [P%d] ",
1050                                         adapter->host->host_no,
1051                                         cmd->device->channel, channel);
1052                         printk("for physical devices.\n");
1053 
1054                         adapter->flag |= (1L << cmd->device->channel);
1055                 }
1056                 /* Fall through */
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
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
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
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
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         printk(KERN_WARNING "megaraid: 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
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
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
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         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                                 printk(KERN_CRIT
1458                                         "megaraid: invalid command ");
1459                                 printk("Id %d, scb->state:%x, scsi cmd:%p\n",
1460                                         cmdid, scb->state, scb->cmd);
1461 
1462                                 continue;
1463                         }
1464 
1465                         /*
1466                          * Was a abort issued for this command
1467                          */
1468                         if( scb->state & SCB_ABORT ) {
1469 
1470                                 printk(KERN_WARNING
1471                                 "megaraid: aborted cmd [%x] complete.\n",
1472                                         scb->idx);
1473 
1474                                 scb->cmd->result = (DID_ABORT << 16);
1475 
1476                                 list_add_tail(SCSI_LIST(scb->cmd),
1477                                                 &adapter->completed_list);
1478 
1479                                 mega_free_scb(adapter, scb);
1480 
1481                                 continue;
1482                         }
1483 
1484                         /*
1485                          * Was a reset issued for this command
1486                          */
1487                         if( scb->state & SCB_RESET ) {
1488 
1489                                 printk(KERN_WARNING
1490                                 "megaraid: reset cmd [%x] complete.\n",
1491                                         scb->idx);
1492 
1493                                 scb->cmd->result = (DID_RESET << 16);
1494 
1495                                 list_add_tail(SCSI_LIST(scb->cmd),
1496                                                 &adapter->completed_list);
1497 
1498                                 mega_free_scb (adapter, scb);
1499 
1500                                 continue;
1501                         }
1502 
1503                         cmd = scb->cmd;
1504                         pthru = scb->pthru;
1505                         epthru = scb->epthru;
1506                         mbox = (mbox_t *)scb->raw_mbox;
1507 
1508 #if MEGA_HAVE_STATS
1509                         {
1510 
1511                         int     logdrv = mbox->m_out.logdrv;
1512 
1513                         islogical = adapter->logdrv_chan[cmd->channel];
1514                         /*
1515                          * Maintain an error counter for the logical drive.
1516                          * Some application like SNMP agent need such
1517                          * statistics
1518                          */
1519                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1520                                                 cmd->cmnd[0] == READ_10 ||
1521                                                 cmd->cmnd[0] == READ_12)) {
1522                                 /*
1523                                  * Logical drive number increases by 0x80 when
1524                                  * a logical drive is deleted
1525                                  */
1526                                 adapter->rd_errors[logdrv%0x80]++;
1527                         }
1528 
1529                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1530                                                 cmd->cmnd[0] == WRITE_10 ||
1531                                                 cmd->cmnd[0] == WRITE_12)) {
1532                                 /*
1533                                  * Logical drive number increases by 0x80 when
1534                                  * a logical drive is deleted
1535                                  */
1536                                 adapter->wr_errors[logdrv%0x80]++;
1537                         }
1538 
1539                         }
1540 #endif
1541                 }
1542 
1543                 /*
1544                  * Do not return the presence of hard disk on the channel so,
1545                  * inquiry sent, and returned data==hard disk or removable
1546                  * hard disk and not logical, request should return failure! -
1547                  * PJ
1548                  */
1549                 islogical = adapter->logdrv_chan[cmd->device->channel];
1550                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1551 
1552                         sgl = scsi_sglist(cmd);
1553                         if( sg_page(sgl) ) {
1554                                 c = *(unsigned char *) sg_virt(&sgl[0]);
1555                         } else {
1556                                 printk(KERN_WARNING
1557                                        "megaraid: invalid sg.\n");
1558                                 c = 0;
1559                         }
1560 
1561                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1562                                         ((c & 0x1F ) == TYPE_DISK)) {
1563                                 status = 0xF0;
1564                         }
1565                 }
1566 
1567                 /* clear result; otherwise, success returns corrupt value */
1568                 cmd->result = 0;
1569 
1570                 /* Convert MegaRAID status to Linux error code */
1571                 switch (status) {
1572                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1573                         cmd->result |= (DID_OK << 16);
1574                         break;
1575 
1576                 case 0x02:      /* ERROR_ABORTED, i.e.
1577                                    SCSI_STATUS_CHECK_CONDITION */
1578 
1579                         /* set sense_buffer and result fields */
1580                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1581                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1582 
1583                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1584                                                 14);
1585 
1586                                 cmd->result = (DRIVER_SENSE << 24) |
1587                                         (DID_OK << 16) |
1588                                         (CHECK_CONDITION << 1);
1589                         }
1590                         else {
1591                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1592 
1593                                         memcpy(cmd->sense_buffer,
1594                                                 epthru->reqsensearea, 14);
1595 
1596                                         cmd->result = (DRIVER_SENSE << 24) |
1597                                                 (DID_OK << 16) |
1598                                                 (CHECK_CONDITION << 1);
1599                                 } else {
1600                                         cmd->sense_buffer[0] = 0x70;
1601                                         cmd->sense_buffer[2] = ABORTED_COMMAND;
1602                                         cmd->result |= (CHECK_CONDITION << 1);
1603                                 }
1604                         }
1605                         break;
1606 
1607                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1608                                    SCSI_STATUS_BUSY */
1609                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1610                         break;
1611 
1612                 default:
1613 #if MEGA_HAVE_CLUSTERING
1614                         /*
1615                          * If TEST_UNIT_READY fails, we know
1616                          * MEGA_RESERVATION_STATUS failed
1617                          */
1618                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1619                                 cmd->result |= (DID_ERROR << 16) |
1620                                         (RESERVATION_CONFLICT << 1);
1621                         }
1622                         else
1623                         /*
1624                          * Error code returned is 1 if Reserve or Release
1625                          * failed or the input parameter is invalid
1626                          */
1627                         if( status == 1 &&
1628                                 (cmd->cmnd[0] == RESERVE ||
1629                                          cmd->cmnd[0] == RELEASE) ) {
1630 
1631                                 cmd->result |= (DID_ERROR << 16) |
1632                                         (RESERVATION_CONFLICT << 1);
1633                         }
1634                         else
1635 #endif
1636                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1637                 }
1638 
1639                 mega_free_scb(adapter, scb);
1640 
1641                 /* Add Scsi_Command to end of completed queue */
1642                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1643         }
1644 }
1645 
1646 
1647 /*
1648  * mega_runpendq()
1649  *
1650  * Run through the list of completed requests and finish it
1651  */
1652 static void
1653 mega_rundoneq (adapter_t *adapter)
1654 {
1655         Scsi_Cmnd *cmd;
1656         struct list_head *pos;
1657 
1658         list_for_each(pos, &adapter->completed_list) {
1659 
1660                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1661 
1662                 cmd = list_entry(spos, Scsi_Cmnd, SCp);
1663                 cmd->scsi_done(cmd);
1664         }
1665 
1666         INIT_LIST_HEAD(&adapter->completed_list);
1667 }
1668 
1669 
1670 /*
1671  * Free a SCB structure
1672  * Note: We assume the scsi commands associated with this scb is not free yet.
1673  */
1674 static void
1675 mega_free_scb(adapter_t *adapter, scb_t *scb)
1676 {
1677         switch( scb->dma_type ) {
1678 
1679         case MEGA_DMA_TYPE_NONE:
1680                 break;
1681 
1682         case MEGA_SGLIST:
1683                 scsi_dma_unmap(scb->cmd);
1684                 break;
1685         default:
1686                 break;
1687         }
1688 
1689         /*
1690          * Remove from the pending list
1691          */
1692         list_del_init(&scb->list);
1693 
1694         /* Link the scb back into free list */
1695         scb->state = SCB_FREE;
1696         scb->cmd = NULL;
1697 
1698         list_add(&scb->list, &adapter->free_list);
1699 }
1700 
1701 
1702 static int
1703 __mega_busywait_mbox (adapter_t *adapter)
1704 {
1705         volatile mbox_t *mbox = adapter->mbox;
1706         long counter;
1707 
1708         for (counter = 0; counter < 10000; counter++) {
1709                 if (!mbox->m_in.busy)
1710                         return 0;
1711                 udelay(100);
1712                 cond_resched();
1713         }
1714         return -1;              /* give up after 1 second */
1715 }
1716 
1717 /*
1718  * Copies data to SGLIST
1719  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1720  */
1721 static int
1722 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1723 {
1724         struct scatterlist *sg;
1725         Scsi_Cmnd       *cmd;
1726         int     sgcnt;
1727         int     idx;
1728 
1729         cmd = scb->cmd;
1730 
1731         /*
1732          * Copy Scatter-Gather list info into controller structure.
1733          *
1734          * The number of sg elements returned must not exceed our limit
1735          */
1736         sgcnt = scsi_dma_map(cmd);
1737 
1738         scb->dma_type = MEGA_SGLIST;
1739 
1740         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1741 
1742         *len = 0;
1743 
1744         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1745                 sg = scsi_sglist(cmd);
1746                 scb->dma_h_bulkdata = sg_dma_address(sg);
1747                 *buf = (u32)scb->dma_h_bulkdata;
1748                 *len = sg_dma_len(sg);
1749                 return 0;
1750         }
1751 
1752         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1753                 if (adapter->has_64bit_addr) {
1754                         scb->sgl64[idx].address = sg_dma_address(sg);
1755                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1756                 } else {
1757                         scb->sgl[idx].address = sg_dma_address(sg);
1758                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1759                 }
1760         }
1761 
1762         /* Reset pointer and length fields */
1763         *buf = scb->sgl_dma_addr;
1764 
1765         /* Return count of SG requests */
1766         return sgcnt;
1767 }
1768 
1769 
1770 /*
1771  * mega_8_to_40ld()
1772  *
1773  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1774  * Enquiry3 structures for later use
1775  */
1776 static void
1777 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1778                 mega_product_info *product_info)
1779 {
1780         int i;
1781 
1782         product_info->max_commands = inquiry->adapter_info.max_commands;
1783         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1784         product_info->nchannels = inquiry->adapter_info.nchannels;
1785 
1786         for (i = 0; i < 4; i++) {
1787                 product_info->fw_version[i] =
1788                         inquiry->adapter_info.fw_version[i];
1789 
1790                 product_info->bios_version[i] =
1791                         inquiry->adapter_info.bios_version[i];
1792         }
1793         enquiry3->cache_flush_interval =
1794                 inquiry->adapter_info.cache_flush_interval;
1795 
1796         product_info->dram_size = inquiry->adapter_info.dram_size;
1797 
1798         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1799 
1800         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1801                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1802                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1803                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1804         }
1805 
1806         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1807                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1808 }
1809 
1810 static inline void
1811 mega_free_sgl(adapter_t *adapter)
1812 {
1813         scb_t   *scb;
1814         int     i;
1815 
1816         for(i = 0; i < adapter->max_cmds; i++) {
1817 
1818                 scb = &adapter->scb_list[i];
1819 
1820                 if( scb->sgl64 ) {
1821                         pci_free_consistent(adapter->dev,
1822                                 sizeof(mega_sgl64) * adapter->sglen,
1823                                 scb->sgl64,
1824                                 scb->sgl_dma_addr);
1825 
1826                         scb->sgl64 = NULL;
1827                 }
1828 
1829                 if( scb->pthru ) {
1830                         pci_free_consistent(adapter->dev, sizeof(mega_passthru),
1831                                 scb->pthru, scb->pthru_dma_addr);
1832 
1833                         scb->pthru = NULL;
1834                 }
1835 
1836                 if( scb->epthru ) {
1837                         pci_free_consistent(adapter->dev,
1838                                 sizeof(mega_ext_passthru),
1839                                 scb->epthru, scb->epthru_dma_addr);
1840 
1841                         scb->epthru = NULL;
1842                 }
1843 
1844         }
1845 }
1846 
1847 
1848 /*
1849  * Get information about the card/driver
1850  */
1851 const char *
1852 megaraid_info(struct Scsi_Host *host)
1853 {
1854         static char buffer[512];
1855         adapter_t *adapter;
1856 
1857         adapter = (adapter_t *)host->hostdata;
1858 
1859         sprintf (buffer,
1860                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1861                  adapter->fw_version, adapter->product_info.max_commands,
1862                  adapter->host->max_id, adapter->host->max_channel,
1863                  adapter->host->max_lun);
1864         return buffer;
1865 }
1866 
1867 /*
1868  * Abort a previous SCSI request. Only commands on the pending list can be
1869  * aborted. All the commands issued to the F/W must complete.
1870  */
1871 static int
1872 megaraid_abort(Scsi_Cmnd *cmd)
1873 {
1874         adapter_t       *adapter;
1875         int             rval;
1876 
1877         adapter = (adapter_t *)cmd->device->host->hostdata;
1878 
1879         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1880 
1881         /*
1882          * This is required here to complete any completed requests
1883          * to be communicated over to the mid layer.
1884          */
1885         mega_rundoneq(adapter);
1886 
1887         return rval;
1888 }
1889 
1890 
1891 static int
1892 megaraid_reset(struct scsi_cmnd *cmd)
1893 {
1894         adapter_t       *adapter;
1895         megacmd_t       mc;
1896         int             rval;
1897 
1898         adapter = (adapter_t *)cmd->device->host->hostdata;
1899 
1900 #if MEGA_HAVE_CLUSTERING
1901         mc.cmd = MEGA_CLUSTER_CMD;
1902         mc.opcode = MEGA_RESET_RESERVATIONS;
1903 
1904         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1905                 printk(KERN_WARNING
1906                                 "megaraid: reservation reset failed.\n");
1907         }
1908         else {
1909                 printk(KERN_INFO "megaraid: reservation reset.\n");
1910         }
1911 #endif
1912 
1913         spin_lock_irq(&adapter->lock);
1914 
1915         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1916 
1917         /*
1918          * This is required here to complete any completed requests
1919          * to be communicated over to the mid layer.
1920          */
1921         mega_rundoneq(adapter);
1922         spin_unlock_irq(&adapter->lock);
1923 
1924         return rval;
1925 }
1926 
1927 /**
1928  * megaraid_abort_and_reset()
1929  * @adapter - megaraid soft state
1930  * @cmd - scsi command to be aborted or reset
1931  * @aor - abort or reset flag
1932  *
1933  * Try to locate the scsi command in the pending queue. If found and is not
1934  * issued to the controller, abort/reset it. Otherwise return failure
1935  */
1936 static int
1937 megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
1938 {
1939         struct list_head        *pos, *next;
1940         scb_t                   *scb;
1941 
1942         printk(KERN_WARNING "megaraid: %s cmd=%x <c=%d t=%d l=%d>\n",
1943              (aor == SCB_ABORT)? "ABORTING":"RESET",
1944              cmd->cmnd[0], cmd->device->channel, 
1945              cmd->device->id, cmd->device->lun);
1946 
1947         if(list_empty(&adapter->pending_list))
1948                 return FALSE;
1949 
1950         list_for_each_safe(pos, next, &adapter->pending_list) {
1951 
1952                 scb = list_entry(pos, scb_t, list);
1953 
1954                 if (scb->cmd == cmd) { /* Found command */
1955 
1956                         scb->state |= aor;
1957 
1958                         /*
1959                          * Check if this command has firmware ownership. If
1960                          * yes, we cannot reset this command. Whenever f/w
1961                          * completes this command, we will return appropriate
1962                          * status from ISR.
1963                          */
1964                         if( scb->state & SCB_ISSUED ) {
1965 
1966                                 printk(KERN_WARNING
1967                                         "megaraid: %s[%x], fw owner.\n",
1968                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1969                                         scb->idx);
1970 
1971                                 return FALSE;
1972                         }
1973                         else {
1974 
1975                                 /*
1976                                  * Not yet issued! Remove from the pending
1977                                  * list
1978                                  */
1979                                 printk(KERN_WARNING
1980                                         "megaraid: %s-[%x], driver owner.\n",
1981                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1982                                         scb->idx);
1983 
1984                                 mega_free_scb(adapter, scb);
1985 
1986                                 if( aor == SCB_ABORT ) {
1987                                         cmd->result = (DID_ABORT << 16);
1988                                 }
1989                                 else {
1990                                         cmd->result = (DID_RESET << 16);
1991                                 }
1992 
1993                                 list_add_tail(SCSI_LIST(cmd),
1994                                                 &adapter->completed_list);
1995 
1996                                 return TRUE;
1997                         }
1998                 }
1999         }
2000 
2001         return FALSE;
2002 }
2003 
2004 static inline int
2005 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2006 {
2007         *pdev = pci_alloc_dev(NULL);
2008 
2009         if( *pdev == NULL ) return -1;
2010 
2011         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2012 
2013         if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
2014                 kfree(*pdev);
2015                 return -1;
2016         }
2017 
2018         return 0;
2019 }
2020 
2021 static inline void
2022 free_local_pdev(struct pci_dev *pdev)
2023 {
2024         kfree(pdev);
2025 }
2026 
2027 /**
2028  * mega_allocate_inquiry()
2029  * @dma_handle - handle returned for dma address
2030  * @pdev - handle to pci device
2031  *
2032  * allocates memory for inquiry structure
2033  */
2034 static inline void *
2035 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2036 {
2037         return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
2038 }
2039 
2040 
2041 static inline void
2042 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2043 {
2044         pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
2045 }
2046 
2047 
2048 #ifdef CONFIG_PROC_FS
2049 /* Following code handles /proc fs  */
2050 
2051 /**
2052  * proc_show_config()
2053  * @m - Synthetic file construction data
2054  * @v - File iterator
2055  *
2056  * Display configuration information about the controller.
2057  */
2058 static int
2059 proc_show_config(struct seq_file *m, void *v)
2060 {
2061 
2062         adapter_t *adapter = m->private;
2063 
2064         seq_puts(m, MEGARAID_VERSION);
2065         if(adapter->product_info.product_name[0])
2066                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2067 
2068         seq_puts(m, "Controller Type: ");
2069 
2070         if( adapter->flag & BOARD_MEMMAP )
2071                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2072         else
2073                 seq_puts(m, "418/428/434\n");
2074 
2075         if(adapter->flag & BOARD_40LD)
2076                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2077 
2078         if(adapter->flag & BOARD_64BIT)
2079                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2080         if( adapter->has_64bit_addr )
2081                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2082         else
2083                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2084 
2085         seq_printf(m, "Base = %08lx, Irq = %d, ",
2086                    adapter->base, adapter->host->irq);
2087 
2088         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2089                    adapter->numldrv, adapter->product_info.nchannels);
2090 
2091         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2092                    adapter->fw_version, adapter->bios_version,
2093                    adapter->product_info.dram_size);
2094 
2095         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2096                    adapter->product_info.max_commands, adapter->max_cmds);
2097 
2098         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2099         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2100         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2101         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2102         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2103         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2104         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2105         seq_printf(m, "quiescent          = %d\n",
2106                    atomic_read(&adapter->quiescent));
2107         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2108 
2109         seq_puts(m, "\nModule Parameters:\n");
2110         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2111         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2112         return 0;
2113 }
2114 
2115 /**
2116  * proc_show_stat()
2117  * @m - Synthetic file construction data
2118  * @v - File iterator
2119  *
2120  * Display statistical information about the I/O activity.
2121  */
2122 static int
2123 proc_show_stat(struct seq_file *m, void *v)
2124 {
2125         adapter_t *adapter = m->private;
2126 #if MEGA_HAVE_STATS
2127         int     i;
2128 #endif
2129 
2130         seq_puts(m, "Statistical Information for this controller\n");
2131         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2132 #if MEGA_HAVE_STATS
2133         for(i = 0; i < adapter->numldrv; i++) {
2134                 seq_printf(m, "Logical Drive %d:\n", i);
2135                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2136                            adapter->nreads[i], adapter->nwrites[i]);
2137                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2138                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2139                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2140                            adapter->rd_errors[i], adapter->wr_errors[i]);
2141         }
2142 #else
2143         seq_puts(m, "IO and error counters not compiled in driver.\n");
2144 #endif
2145         return 0;
2146 }
2147 
2148 
2149 /**
2150  * proc_show_mbox()
2151  * @m - Synthetic file construction data
2152  * @v - File iterator
2153  *
2154  * Display mailbox information for the last command issued. This information
2155  * is good for debugging.
2156  */
2157 static int
2158 proc_show_mbox(struct seq_file *m, void *v)
2159 {
2160         adapter_t       *adapter = m->private;
2161         volatile mbox_t *mbox = adapter->mbox;
2162 
2163         seq_puts(m, "Contents of Mail Box Structure\n");
2164         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2165         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2166         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2167         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2168         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2169         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2170         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2171         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2172         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2173         return 0;
2174 }
2175 
2176 
2177 /**
2178  * proc_show_rebuild_rate()
2179  * @m - Synthetic file construction data
2180  * @v - File iterator
2181  *
2182  * Display current rebuild rate
2183  */
2184 static int
2185 proc_show_rebuild_rate(struct seq_file *m, void *v)
2186 {
2187         adapter_t       *adapter = m->private;
2188         dma_addr_t      dma_handle;
2189         caddr_t         inquiry;
2190         struct pci_dev  *pdev;
2191 
2192         if( make_local_pdev(adapter, &pdev) != 0 )
2193                 return 0;
2194 
2195         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2196                 goto free_pdev;
2197 
2198         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2199                 seq_puts(m, "Adapter inquiry failed.\n");
2200                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2201                 goto free_inquiry;
2202         }
2203 
2204         if( adapter->flag & BOARD_40LD )
2205                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2206                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2207         else
2208                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2209                         ((mraid_ext_inquiry *)
2210                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2211 
2212 free_inquiry:
2213         mega_free_inquiry(inquiry, dma_handle, pdev);
2214 free_pdev:
2215         free_local_pdev(pdev);
2216         return 0;
2217 }
2218 
2219 
2220 /**
2221  * proc_show_battery()
2222  * @m - Synthetic file construction data
2223  * @v - File iterator
2224  *
2225  * Display information about the battery module on the controller.
2226  */
2227 static int
2228 proc_show_battery(struct seq_file *m, void *v)
2229 {
2230         adapter_t       *adapter = m->private;
2231         dma_addr_t      dma_handle;
2232         caddr_t         inquiry;
2233         struct pci_dev  *pdev;
2234         u8      battery_status;
2235 
2236         if( make_local_pdev(adapter, &pdev) != 0 )
2237                 return 0;
2238 
2239         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2240                 goto free_pdev;
2241 
2242         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2243                 seq_printf(m, "Adapter inquiry failed.\n");
2244                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2245                 goto free_inquiry;
2246         }
2247 
2248         if( adapter->flag & BOARD_40LD ) {
2249                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2250         }
2251         else {
2252                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2253                         raid_inq.adapter_info.battery_status;
2254         }
2255 
2256         /*
2257          * Decode the battery status
2258          */
2259         seq_printf(m, "Battery Status:[%d]", battery_status);
2260 
2261         if(battery_status == MEGA_BATT_CHARGE_DONE)
2262                 seq_puts(m, " Charge Done");
2263 
2264         if(battery_status & MEGA_BATT_MODULE_MISSING)
2265                 seq_puts(m, " Module Missing");
2266         
2267         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2268                 seq_puts(m, " Low Voltage");
2269         
2270         if(battery_status & MEGA_BATT_TEMP_HIGH)
2271                 seq_puts(m, " Temperature High");
2272         
2273         if(battery_status & MEGA_BATT_PACK_MISSING)
2274                 seq_puts(m, " Pack Missing");
2275         
2276         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2277                 seq_puts(m, " Charge In-progress");
2278         
2279         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2280                 seq_puts(m, " Charge Fail");
2281         
2282         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2283                 seq_puts(m, " Cycles Exceeded");
2284 
2285         seq_putc(m, '\n');
2286 
2287 free_inquiry:
2288         mega_free_inquiry(inquiry, dma_handle, pdev);
2289 free_pdev:
2290         free_local_pdev(pdev);
2291         return 0;
2292 }
2293 
2294 
2295 /*
2296  * Display scsi inquiry
2297  */
2298 static void
2299 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2300 {
2301         int     i;
2302 
2303         seq_puts(m, "  Vendor: ");
2304         seq_write(m, scsi_inq + 8, 8);
2305         seq_puts(m, "  Model: ");
2306         seq_write(m, scsi_inq + 16, 16);
2307         seq_puts(m, "  Rev: ");
2308         seq_write(m, scsi_inq + 32, 4);
2309         seq_putc(m, '\n');
2310 
2311         i = scsi_inq[0] & 0x1f;
2312         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2313 
2314         seq_printf(m, "                 ANSI SCSI revision: %02x",
2315                    scsi_inq[2] & 0x07);
2316 
2317         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2318                 seq_puts(m, " CCS\n");
2319         else
2320                 seq_putc(m, '\n');
2321 }
2322 
2323 /**
2324  * proc_show_pdrv()
2325  * @m - Synthetic file construction data
2326  * @page - buffer to write the data in
2327  * @adapter - pointer to our soft state
2328  *
2329  * Display information about the physical drives.
2330  */
2331 static int
2332 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2333 {
2334         dma_addr_t      dma_handle;
2335         char            *scsi_inq;
2336         dma_addr_t      scsi_inq_dma_handle;
2337         caddr_t         inquiry;
2338         struct pci_dev  *pdev;
2339         u8      *pdrv_state;
2340         u8      state;
2341         int     tgt;
2342         int     max_channels;
2343         int     i;
2344 
2345         if( make_local_pdev(adapter, &pdev) != 0 )
2346                 return 0;
2347 
2348         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2349                 goto free_pdev;
2350 
2351         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2352                 seq_puts(m, "Adapter inquiry failed.\n");
2353                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2354                 goto free_inquiry;
2355         }
2356 
2357 
2358         scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
2359         if( scsi_inq == NULL ) {
2360                 seq_puts(m, "memory not available for scsi inq.\n");
2361                 goto free_inquiry;
2362         }
2363 
2364         if( adapter->flag & BOARD_40LD ) {
2365                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2366         }
2367         else {
2368                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2369                         raid_inq.pdrv_info.pdrv_state;
2370         }
2371 
2372         max_channels = adapter->product_info.nchannels;
2373 
2374         if( channel >= max_channels ) {
2375                 goto free_pci;
2376         }
2377 
2378         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2379 
2380                 i = channel*16 + tgt;
2381 
2382                 state = *(pdrv_state + i);
2383                 switch( state & 0x0F ) {
2384                 case PDRV_ONLINE:
2385                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2386                                    channel, tgt);
2387                         break;
2388 
2389                 case PDRV_FAILED:
2390                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2391                                    channel, tgt);
2392                         break;
2393 
2394                 case PDRV_RBLD:
2395                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2396                                    channel, tgt);
2397                         break;
2398 
2399                 case PDRV_HOTSPARE:
2400                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2401                                    channel, tgt);
2402                         break;
2403 
2404                 default:
2405                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2406                                    channel, tgt);
2407                         break;
2408                 }
2409 
2410                 /*
2411                  * This interface displays inquiries for disk drives
2412                  * only. Inquries for logical drives and non-disk
2413                  * devices are available through /proc/scsi/scsi
2414                  */
2415                 memset(scsi_inq, 0, 256);
2416                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2417                                 scsi_inq_dma_handle) ||
2418                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2419                         continue;
2420                 }
2421 
2422                 /*
2423                  * Check for overflow. We print less than 240
2424                  * characters for inquiry
2425                  */
2426                 seq_puts(m, ".\n");
2427                 mega_print_inquiry(m, scsi_inq);
2428         }
2429 
2430 free_pci:
2431         pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
2432 free_inquiry:
2433         mega_free_inquiry(inquiry, dma_handle, pdev);
2434 free_pdev:
2435         free_local_pdev(pdev);
2436         return 0;
2437 }
2438 
2439 /**
2440  * proc_show_pdrv_ch0()
2441  * @m - Synthetic file construction data
2442  * @v - File iterator
2443  *
2444  * Display information about the physical drives on physical channel 0.
2445  */
2446 static int
2447 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2448 {
2449         return proc_show_pdrv(m, m->private, 0);
2450 }
2451 
2452 
2453 /**
2454  * proc_show_pdrv_ch1()
2455  * @m - Synthetic file construction data
2456  * @v - File iterator
2457  *
2458  * Display information about the physical drives on physical channel 1.
2459  */
2460 static int
2461 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2462 {
2463         return proc_show_pdrv(m, m->private, 1);
2464 }
2465 
2466 
2467 /**
2468  * proc_show_pdrv_ch2()
2469  * @m - Synthetic file construction data
2470  * @v - File iterator
2471  *
2472  * Display information about the physical drives on physical channel 2.
2473  */
2474 static int
2475 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2476 {
2477         return proc_show_pdrv(m, m->private, 2);
2478 }
2479 
2480 
2481 /**
2482  * proc_show_pdrv_ch3()
2483  * @m - Synthetic file construction data
2484  * @v - File iterator
2485  *
2486  * Display information about the physical drives on physical channel 3.
2487  */
2488 static int
2489 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2490 {
2491         return proc_show_pdrv(m, m->private, 3);
2492 }
2493 
2494 
2495 /**
2496  * proc_show_rdrv()
2497  * @m - Synthetic file construction data
2498  * @adapter - pointer to our soft state
2499  * @start - starting logical drive to display
2500  * @end - ending logical drive to display
2501  *
2502  * We do not print the inquiry information since its already available through
2503  * /proc/scsi/scsi interface
2504  */
2505 static int
2506 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2507 {
2508         dma_addr_t      dma_handle;
2509         logdrv_param    *lparam;
2510         megacmd_t       mc;
2511         char            *disk_array;
2512         dma_addr_t      disk_array_dma_handle;
2513         caddr_t         inquiry;
2514         struct pci_dev  *pdev;
2515         u8      *rdrv_state;
2516         int     num_ldrv;
2517         u32     array_sz;
2518         int     i;
2519 
2520         if( make_local_pdev(adapter, &pdev) != 0 )
2521                 return 0;
2522 
2523         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2524                 goto free_pdev;
2525 
2526         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2527                 seq_puts(m, "Adapter inquiry failed.\n");
2528                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2529                 goto free_inquiry;
2530         }
2531 
2532         memset(&mc, 0, sizeof(megacmd_t));
2533 
2534         if( adapter->flag & BOARD_40LD ) {
2535                 array_sz = sizeof(disk_array_40ld);
2536 
2537                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2538 
2539                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2540         }
2541         else {
2542                 array_sz = sizeof(disk_array_8ld);
2543 
2544                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2545                         raid_inq.logdrv_info.ldrv_state;
2546 
2547                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2548                         raid_inq.logdrv_info.num_ldrv;
2549         }
2550 
2551         disk_array = pci_alloc_consistent(pdev, array_sz,
2552                         &disk_array_dma_handle);
2553 
2554         if( disk_array == NULL ) {
2555                 seq_puts(m, "memory not available.\n");
2556                 goto free_inquiry;
2557         }
2558 
2559         mc.xferaddr = (u32)disk_array_dma_handle;
2560 
2561         if( adapter->flag & BOARD_40LD ) {
2562                 mc.cmd = FC_NEW_CONFIG;
2563                 mc.opcode = OP_DCMD_READ_CONFIG;
2564 
2565                 if( mega_internal_command(adapter, &mc, NULL) ) {
2566                         seq_puts(m, "40LD read config failed.\n");
2567                         goto free_pci;
2568                 }
2569 
2570         }
2571         else {
2572                 mc.cmd = NEW_READ_CONFIG_8LD;
2573 
2574                 if( mega_internal_command(adapter, &mc, NULL) ) {
2575                         mc.cmd = READ_CONFIG_8LD;
2576                         if( mega_internal_command(adapter, &mc, NULL) ) {
2577                                 seq_puts(m, "8LD read config failed.\n");
2578                                 goto free_pci;
2579                         }
2580                 }
2581         }
2582 
2583         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2584 
2585                 if( adapter->flag & BOARD_40LD ) {
2586                         lparam =
2587                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2588                 }
2589                 else {
2590                         lparam =
2591                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2592                 }
2593 
2594                 /*
2595                  * Check for overflow. We print less than 240 characters for
2596                  * information about each logical drive.
2597                  */
2598                 seq_printf(m, "Logical drive:%2d:, ", i);
2599 
2600                 switch( rdrv_state[i] & 0x0F ) {
2601                 case RDRV_OFFLINE:
2602                         seq_puts(m, "state: offline");
2603                         break;
2604                 case RDRV_DEGRADED:
2605                         seq_puts(m, "state: degraded");
2606                         break;
2607                 case RDRV_OPTIMAL:
2608                         seq_puts(m, "state: optimal");
2609                         break;
2610                 case RDRV_DELETED:
2611                         seq_puts(m, "state: deleted");
2612                         break;
2613                 default:
2614                         seq_puts(m, "state: unknown");
2615                         break;
2616                 }
2617 
2618                 /*
2619                  * Check if check consistency or initialization is going on
2620                  * for this logical drive.
2621                  */
2622                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2623                         seq_puts(m, ", check-consistency in progress");
2624                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2625                         seq_puts(m, ", initialization in progress");
2626                 
2627                 seq_putc(m, '\n');
2628 
2629                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2630                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2631                 seq_printf(m, "Stripe size:%3d, ",
2632                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2633                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2634 
2635                 seq_puts(m, "Read Policy: ");
2636                 switch(lparam->read_ahead) {
2637                 case NO_READ_AHEAD:
2638                         seq_puts(m, "No read ahead, ");
2639                         break;
2640                 case READ_AHEAD:
2641                         seq_puts(m, "Read ahead, ");
2642                         break;
2643                 case ADAP_READ_AHEAD:
2644                         seq_puts(m, "Adaptive, ");
2645                         break;
2646 
2647                 }
2648 
2649                 seq_puts(m, "Write Policy: ");
2650                 switch(lparam->write_mode) {
2651                 case WRMODE_WRITE_THRU:
2652                         seq_puts(m, "Write thru, ");
2653                         break;
2654                 case WRMODE_WRITE_BACK:
2655                         seq_puts(m, "Write back, ");
2656                         break;
2657                 }
2658 
2659                 seq_puts(m, "Cache Policy: ");
2660                 switch(lparam->direct_io) {
2661                 case CACHED_IO:
2662                         seq_puts(m, "Cached IO\n\n");
2663                         break;
2664                 case DIRECT_IO:
2665                         seq_puts(m, "Direct IO\n\n");
2666                         break;
2667                 }
2668         }
2669 
2670 free_pci:
2671         pci_free_consistent(pdev, array_sz, disk_array,
2672                         disk_array_dma_handle);
2673 free_inquiry:
2674         mega_free_inquiry(inquiry, dma_handle, pdev);
2675 free_pdev:
2676         free_local_pdev(pdev);
2677         return 0;
2678 }
2679 
2680 /**
2681  * proc_show_rdrv_10()
2682  * @m - Synthetic file construction data
2683  * @v - File iterator
2684  *
2685  * Display real time information about the logical drives 0 through 9.
2686  */
2687 static int
2688 proc_show_rdrv_10(struct seq_file *m, void *v)
2689 {
2690         return proc_show_rdrv(m, m->private, 0, 9);
2691 }
2692 
2693 
2694 /**
2695  * proc_show_rdrv_20()
2696  * @m - Synthetic file construction data
2697  * @v - File iterator
2698  *
2699  * Display real time information about the logical drives 0 through 9.
2700  */
2701 static int
2702 proc_show_rdrv_20(struct seq_file *m, void *v)
2703 {
2704         return proc_show_rdrv(m, m->private, 10, 19);
2705 }
2706 
2707 
2708 /**
2709  * proc_show_rdrv_30()
2710  * @m - Synthetic file construction data
2711  * @v - File iterator
2712  *
2713  * Display real time information about the logical drives 0 through 9.
2714  */
2715 static int
2716 proc_show_rdrv_30(struct seq_file *m, void *v)
2717 {
2718         return proc_show_rdrv(m, m->private, 20, 29);
2719 }
2720 
2721 
2722 /**
2723  * proc_show_rdrv_40()
2724  * @m - Synthetic file construction data
2725  * @v - File iterator
2726  *
2727  * Display real time information about the logical drives 0 through 9.
2728  */
2729 static int
2730 proc_show_rdrv_40(struct seq_file *m, void *v)
2731 {
2732         return proc_show_rdrv(m, m->private, 30, 39);
2733 }
2734 
2735 
2736 /*
2737  * seq_file wrappers for procfile show routines.
2738  */
2739 static int mega_proc_open(struct inode *inode, struct file *file)
2740 {
2741         adapter_t *adapter = proc_get_parent_data(inode);
2742         int (*show)(struct seq_file *, void *) = PDE_DATA(inode);
2743 
2744         return single_open(file, show, adapter);
2745 }
2746 
2747 static const struct file_operations mega_proc_fops = {
2748         .open           = mega_proc_open,
2749         .read           = seq_read,
2750         .llseek         = seq_lseek,
2751         .release        = single_release,
2752 };
2753 
2754 /*
2755  * Table of proc files we need to create.
2756  */
2757 struct mega_proc_file {
2758         const char *name;
2759         unsigned short ptr_offset;
2760         int (*show) (struct seq_file *m, void *v);
2761 };
2762 
2763 static const struct mega_proc_file mega_proc_files[] = {
2764         { "config",           offsetof(adapter_t, proc_read), proc_show_config },
2765         { "stat",             offsetof(adapter_t, proc_stat), proc_show_stat },
2766         { "mailbox",          offsetof(adapter_t, proc_mbox), proc_show_mbox },
2767 #if MEGA_HAVE_ENH_PROC
2768         { "rebuild-rate",     offsetof(adapter_t, proc_rr), proc_show_rebuild_rate },
2769         { "battery-status",   offsetof(adapter_t, proc_battery), proc_show_battery },
2770         { "diskdrives-ch0",   offsetof(adapter_t, proc_pdrvstat[0]), proc_show_pdrv_ch0 },
2771         { "diskdrives-ch1",   offsetof(adapter_t, proc_pdrvstat[1]), proc_show_pdrv_ch1 },
2772         { "diskdrives-ch2",   offsetof(adapter_t, proc_pdrvstat[2]), proc_show_pdrv_ch2 },
2773         { "diskdrives-ch3",   offsetof(adapter_t, proc_pdrvstat[3]), proc_show_pdrv_ch3 },
2774         { "raiddrives-0-9",   offsetof(adapter_t, proc_rdrvstat[0]), proc_show_rdrv_10 },
2775         { "raiddrives-10-19", offsetof(adapter_t, proc_rdrvstat[1]), proc_show_rdrv_20 },
2776         { "raiddrives-20-29", offsetof(adapter_t, proc_rdrvstat[2]), proc_show_rdrv_30 },
2777         { "raiddrives-30-39", offsetof(adapter_t, proc_rdrvstat[3]), proc_show_rdrv_40 },
2778 #endif
2779         { NULL }
2780 };
2781 
2782 /**
2783  * mega_create_proc_entry()
2784  * @index - index in soft state array
2785  * @parent - parent node for this /proc entry
2786  *
2787  * Creates /proc entries for our controllers.
2788  */
2789 static void
2790 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2791 {
2792         const struct mega_proc_file *f;
2793         adapter_t       *adapter = hba_soft_state[index];
2794         struct proc_dir_entry   *dir, *de, **ppde;
2795         u8              string[16];
2796 
2797         sprintf(string, "hba%d", adapter->host->host_no);
2798 
2799         dir = adapter->controller_proc_dir_entry =
2800                 proc_mkdir_data(string, 0, parent, adapter);
2801         if(!dir) {
2802                 printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
2803                 return;
2804         }
2805 
2806         for (f = mega_proc_files; f->name; f++) {
2807                 de = proc_create_data(f->name, S_IRUSR, dir, &mega_proc_fops,
2808                                       f->show);
2809                 if (!de) {
2810                         printk(KERN_WARNING "\nmegaraid: proc_create failed\n");
2811                         return;
2812                 }
2813 
2814                 ppde = (void *)adapter + f->ptr_offset;
2815                 *ppde = de;
2816         }
2817 }
2818 
2819 #else
2820 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2821 {
2822 }
2823 #endif
2824 
2825 
2826 /**
2827  * megaraid_biosparam()
2828  *
2829  * Return the disk geometry for a particular disk
2830  */
2831 static int
2832 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2833                     sector_t capacity, int geom[])
2834 {
2835         adapter_t       *adapter;
2836         unsigned char   *bh;
2837         int     heads;
2838         int     sectors;
2839         int     cylinders;
2840         int     rval;
2841 
2842         /* Get pointer to host config structure */
2843         adapter = (adapter_t *)sdev->host->hostdata;
2844 
2845         if (IS_RAID_CH(adapter, sdev->channel)) {
2846                         /* Default heads (64) & sectors (32) */
2847                         heads = 64;
2848                         sectors = 32;
2849                         cylinders = (ulong)capacity / (heads * sectors);
2850 
2851                         /*
2852                          * Handle extended translation size for logical drives
2853                          * > 1Gb
2854                          */
2855                         if ((ulong)capacity >= 0x200000) {
2856                                 heads = 255;
2857                                 sectors = 63;
2858                                 cylinders = (ulong)capacity / (heads * sectors);
2859                         }
2860 
2861                         /* return result */
2862                         geom[0] = heads;
2863                         geom[1] = sectors;
2864                         geom[2] = cylinders;
2865         }
2866         else {
2867                 bh = scsi_bios_ptable(bdev);
2868 
2869                 if( bh ) {
2870                         rval = scsi_partsize(bh, capacity,
2871                                             &geom[2], &geom[0], &geom[1]);
2872                         kfree(bh);
2873                         if( rval != -1 )
2874                                 return rval;
2875                 }
2876 
2877                 printk(KERN_INFO
2878                 "megaraid: invalid partition on this disk on channel %d\n",
2879                                 sdev->channel);
2880 
2881                 /* Default heads (64) & sectors (32) */
2882                 heads = 64;
2883                 sectors = 32;
2884                 cylinders = (ulong)capacity / (heads * sectors);
2885 
2886                 /* Handle extended translation size for logical drives > 1Gb */
2887                 if ((ulong)capacity >= 0x200000) {
2888                         heads = 255;
2889                         sectors = 63;
2890                         cylinders = (ulong)capacity / (heads * sectors);
2891                 }
2892 
2893                 /* return result */
2894                 geom[0] = heads;
2895                 geom[1] = sectors;
2896                 geom[2] = cylinders;
2897         }
2898 
2899         return 0;
2900 }
2901 
2902 /**
2903  * mega_init_scb()
2904  * @adapter - pointer to our soft state
2905  *
2906  * Allocate memory for the various pointers in the scb structures:
2907  * scatter-gather list pointer, passthru and extended passthru structure
2908  * pointers.
2909  */
2910 static int
2911 mega_init_scb(adapter_t *adapter)
2912 {
2913         scb_t   *scb;
2914         int     i;
2915 
2916         for( i = 0; i < adapter->max_cmds; i++ ) {
2917 
2918                 scb = &adapter->scb_list[i];
2919 
2920                 scb->sgl64 = NULL;
2921                 scb->sgl = NULL;
2922                 scb->pthru = NULL;
2923                 scb->epthru = NULL;
2924         }
2925 
2926         for( i = 0; i < adapter->max_cmds; i++ ) {
2927 
2928                 scb = &adapter->scb_list[i];
2929 
2930                 scb->idx = i;
2931 
2932                 scb->sgl64 = pci_alloc_consistent(adapter->dev,
2933                                 sizeof(mega_sgl64) * adapter->sglen,
2934                                 &scb->sgl_dma_addr);
2935 
2936                 scb->sgl = (mega_sglist *)scb->sgl64;
2937 
2938                 if( !scb->sgl ) {
2939                         printk(KERN_WARNING "RAID: Can't allocate sglist.\n");
2940                         mega_free_sgl(adapter);
2941                         return -1;
2942                 }
2943 
2944                 scb->pthru = pci_alloc_consistent(adapter->dev,
2945                                 sizeof(mega_passthru),
2946                                 &scb->pthru_dma_addr);
2947 
2948                 if( !scb->pthru ) {
2949                         printk(KERN_WARNING "RAID: Can't allocate passthru.\n");
2950                         mega_free_sgl(adapter);
2951                         return -1;
2952                 }
2953 
2954                 scb->epthru = pci_alloc_consistent(adapter->dev,
2955                                 sizeof(mega_ext_passthru),
2956                                 &scb->epthru_dma_addr);
2957 
2958                 if( !scb->epthru ) {
2959                         printk(KERN_WARNING
2960                                 "Can't allocate extended passthru.\n");
2961                         mega_free_sgl(adapter);
2962                         return -1;
2963                 }
2964 
2965 
2966                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2967 
2968                 /*
2969                  * Link to free list
2970                  * lock not required since we are loading the driver, so no
2971                  * commands possible right now.
2972                  */
2973                 scb->state = SCB_FREE;
2974                 scb->cmd = NULL;
2975                 list_add(&scb->list, &adapter->free_list);
2976         }
2977 
2978         return 0;
2979 }
2980 
2981 
2982 /**
2983  * megadev_open()
2984  * @inode - unused
2985  * @filep - unused
2986  *
2987  * Routines for the character/ioctl interface to the driver. Find out if this
2988  * is a valid open. 
2989  */
2990 static int
2991 megadev_open (struct inode *inode, struct file *filep)
2992 {
2993         /*
2994          * Only allow superuser to access private ioctl interface
2995          */
2996         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2997 
2998         return 0;
2999 }
3000 
3001 
3002 /**
3003  * megadev_ioctl()
3004  * @inode - Our device inode
3005  * @filep - unused
3006  * @cmd - ioctl command
3007  * @arg - user buffer
3008  *
3009  * ioctl entry point for our private ioctl interface. We move the data in from
3010  * the user space, prepare the command (if necessary, convert the old MIMD
3011  * ioctl to new ioctl command), and issue a synchronous command to the
3012  * controller.
3013  */
3014 static int
3015 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3016 {
3017         adapter_t       *adapter;
3018         nitioctl_t      uioc;
3019         int             adapno;
3020         int             rval;
3021         mega_passthru   __user *upthru; /* user address for passthru */
3022         mega_passthru   *pthru;         /* copy user passthru here */
3023         dma_addr_t      pthru_dma_hndl;
3024         void            *data = NULL;   /* data to be transferred */
3025         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
3026         megacmd_t       mc;
3027         megastat_t      __user *ustats;
3028         int             num_ldrv;
3029         u32             uxferaddr = 0;
3030         struct pci_dev  *pdev;
3031 
3032         ustats = NULL; /* avoid compilation warnings */
3033         num_ldrv = 0;
3034 
3035         /*
3036          * Make sure only USCSICMD are issued through this interface.
3037          * MIMD application would still fire different command.
3038          */
3039         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
3040                 return -EINVAL;
3041         }
3042 
3043         /*
3044          * Check and convert a possible MIMD command to NIT command.
3045          * mega_m_to_n() copies the data from the user space, so we do not
3046          * have to do it here.
3047          * NOTE: We will need some user address to copyout the data, therefore
3048          * the inteface layer will also provide us with the required user
3049          * addresses.
3050          */
3051         memset(&uioc, 0, sizeof(nitioctl_t));
3052         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3053                 return rval;
3054 
3055 
3056         switch( uioc.opcode ) {
3057 
3058         case GET_DRIVER_VER:
3059                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3060                         return (-EFAULT);
3061 
3062                 break;
3063 
3064         case GET_N_ADAP:
3065                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3066                         return (-EFAULT);
3067 
3068                 /*
3069                  * Shucks. MIMD interface returns a positive value for number
3070                  * of adapters. TODO: Change it to return 0 when there is no
3071                  * applicatio using mimd interface.
3072                  */
3073                 return hba_count;
3074 
3075         case GET_ADAP_INFO:
3076 
3077                 /*
3078                  * Which adapter
3079                  */
3080                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3081                         return (-ENODEV);
3082 
3083                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3084                                 sizeof(struct mcontroller)) )
3085                         return (-EFAULT);
3086                 break;
3087 
3088 #if MEGA_HAVE_STATS
3089 
3090         case GET_STATS:
3091                 /*
3092                  * Which adapter
3093                  */
3094                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3095                         return (-ENODEV);
3096 
3097                 adapter = hba_soft_state[adapno];
3098 
3099                 ustats = uioc.uioc_uaddr;
3100 
3101                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3102                         return (-EFAULT);
3103 
3104                 /*
3105                  * Check for the validity of the logical drive number
3106                  */
3107                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3108 
3109                 if( copy_to_user(ustats->nreads, adapter->nreads,
3110                                         num_ldrv*sizeof(u32)) )
3111                         return -EFAULT;
3112 
3113                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3114                                         num_ldrv*sizeof(u32)) )
3115                         return -EFAULT;
3116 
3117                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3118                                         num_ldrv*sizeof(u32)) )
3119                         return -EFAULT;
3120 
3121                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3122                                         num_ldrv*sizeof(u32)) )
3123                         return -EFAULT;
3124 
3125                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3126                                         num_ldrv*sizeof(u32)) )
3127                         return -EFAULT;
3128 
3129                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3130                                         num_ldrv*sizeof(u32)) )
3131                         return -EFAULT;
3132 
3133                 return 0;
3134 
3135 #endif
3136         case MBOX_CMD:
3137 
3138                 /*
3139                  * Which adapter
3140                  */
3141                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3142                         return (-ENODEV);
3143 
3144                 adapter = hba_soft_state[adapno];
3145 
3146                 /*
3147                  * Deletion of logical drive is a special case. The adapter
3148                  * should be quiescent before this command is issued.
3149                  */
3150                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3151                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3152 
3153                         /*
3154                          * Do we support this feature
3155                          */
3156                         if( !adapter->support_random_del ) {
3157                                 printk(KERN_WARNING "megaraid: logdrv ");
3158                                 printk("delete on non-supporting F/W.\n");
3159 
3160                                 return (-EINVAL);
3161                         }
3162 
3163                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3164 
3165                         if( rval == 0 ) {
3166                                 memset(&mc, 0, sizeof(megacmd_t));
3167 
3168                                 mc.status = rval;
3169 
3170                                 rval = mega_n_to_m((void __user *)arg, &mc);
3171                         }
3172 
3173                         return rval;
3174                 }
3175                 /*
3176                  * This interface only support the regular passthru commands.
3177                  * Reject extended passthru and 64-bit passthru
3178                  */
3179                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3180                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3181 
3182                         printk(KERN_WARNING "megaraid: rejected passthru.\n");
3183 
3184                         return (-EINVAL);
3185                 }
3186 
3187                 /*
3188                  * For all internal commands, the buffer must be allocated in
3189                  * <4GB address range
3190                  */
3191                 if( make_local_pdev(adapter, &pdev) != 0 )
3192                         return -EIO;
3193 
3194                 /* Is it a passthru command or a DCMD */
3195                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3196                         /* Passthru commands */
3197 
3198                         pthru = pci_alloc_consistent(pdev,
3199                                         sizeof(mega_passthru),
3200                                         &pthru_dma_hndl);
3201 
3202                         if( pthru == NULL ) {
3203                                 free_local_pdev(pdev);
3204                                 return (-ENOMEM);
3205                         }
3206 
3207                         /*
3208                          * The user passthru structure
3209                          */
3210                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3211 
3212                         /*
3213                          * Copy in the user passthru here.
3214                          */
3215                         if( copy_from_user(pthru, upthru,
3216                                                 sizeof(mega_passthru)) ) {
3217 
3218                                 pci_free_consistent(pdev,
3219                                                 sizeof(mega_passthru), pthru,
3220                                                 pthru_dma_hndl);
3221 
3222                                 free_local_pdev(pdev);
3223 
3224                                 return (-EFAULT);
3225                         }
3226 
3227                         /*
3228                          * Is there a data transfer
3229                          */
3230                         if( pthru->dataxferlen ) {
3231                                 data = pci_alloc_consistent(pdev,
3232                                                 pthru->dataxferlen,
3233                                                 &data_dma_hndl);
3234 
3235                                 if( data == NULL ) {
3236                                         pci_free_consistent(pdev,
3237                                                         sizeof(mega_passthru),
3238                                                         pthru,
3239                                                         pthru_dma_hndl);
3240 
3241                                         free_local_pdev(pdev);
3242 
3243                                         return (-ENOMEM);
3244                                 }
3245 
3246                                 /*
3247                                  * Save the user address and point the kernel
3248                                  * address at just allocated memory
3249                                  */
3250                                 uxferaddr = pthru->dataxferaddr;
3251                                 pthru->dataxferaddr = data_dma_hndl;
3252                         }
3253 
3254 
3255                         /*
3256                          * Is data coming down-stream
3257                          */
3258                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3259                                 /*
3260                                  * Get the user data
3261                                  */
3262                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3263                                                         pthru->dataxferlen) ) {
3264                                         rval = (-EFAULT);
3265                                         goto freemem_and_return;
3266                                 }
3267                         }
3268 
3269                         memset(&mc, 0, sizeof(megacmd_t));
3270 
3271                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3272                         mc.xferaddr = (u32)pthru_dma_hndl;
3273 
3274                         /*
3275                          * Issue the command
3276                          */
3277                         mega_internal_command(adapter, &mc, pthru);
3278 
3279                         rval = mega_n_to_m((void __user *)arg, &mc);
3280 
3281                         if( rval ) goto freemem_and_return;
3282 
3283 
3284                         /*
3285                          * Is data going up-stream
3286                          */
3287                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3288                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3289                                                         pthru->dataxferlen) ) {
3290                                         rval = (-EFAULT);
3291                                 }
3292                         }
3293 
3294                         /*
3295                          * Send the request sense data also, irrespective of
3296                          * whether the user has asked for it or not.
3297                          */
3298                         if (copy_to_user(upthru->reqsensearea,
3299                                         pthru->reqsensearea, 14))
3300                                 rval = -EFAULT;
3301 
3302 freemem_and_return:
3303                         if( pthru->dataxferlen ) {
3304                                 pci_free_consistent(pdev,
3305                                                 pthru->dataxferlen, data,
3306                                                 data_dma_hndl);
3307                         }
3308 
3309                         pci_free_consistent(pdev, sizeof(mega_passthru),
3310                                         pthru, pthru_dma_hndl);
3311 
3312                         free_local_pdev(pdev);
3313 
3314                         return rval;
3315                 }
3316                 else {
3317                         /* DCMD commands */
3318 
3319                         /*
3320                          * Is there a data transfer
3321                          */
3322                         if( uioc.xferlen ) {
3323                                 data = pci_alloc_consistent(pdev,
3324                                                 uioc.xferlen, &data_dma_hndl);
3325 
3326                                 if( data == NULL ) {
3327                                         free_local_pdev(pdev);
3328                                         return (-ENOMEM);
3329                                 }
3330 
3331                                 uxferaddr = MBOX(uioc)->xferaddr;
3332                         }
3333 
3334                         /*
3335                          * Is data coming down-stream
3336                          */
3337                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3338                                 /*
3339                                  * Get the user data
3340                                  */
3341                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3342                                                         uioc.xferlen) ) {
3343 
3344                                         pci_free_consistent(pdev,
3345                                                         uioc.xferlen,
3346                                                         data, data_dma_hndl);
3347 
3348                                         free_local_pdev(pdev);
3349 
3350                                         return (-EFAULT);
3351                                 }
3352                         }
3353 
3354                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3355 
3356                         mc.xferaddr = (u32)data_dma_hndl;
3357 
3358                         /*
3359                          * Issue the command
3360                          */
3361                         mega_internal_command(adapter, &mc, NULL);
3362 
3363                         rval = mega_n_to_m((void __user *)arg, &mc);
3364 
3365                         if( rval ) {
3366                                 if( uioc.xferlen ) {
3367                                         pci_free_consistent(pdev,
3368                                                         uioc.xferlen, data,
3369                                                         data_dma_hndl);
3370                                 }
3371 
3372                                 free_local_pdev(pdev);
3373 
3374                                 return rval;
3375                         }
3376 
3377                         /*
3378                          * Is data going up-stream
3379                          */
3380                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3381                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3382                                                         uioc.xferlen) ) {
3383 
3384                                         rval = (-EFAULT);
3385                                 }
3386                         }
3387 
3388                         if( uioc.xferlen ) {
3389                                 pci_free_consistent(pdev,
3390                                                 uioc.xferlen, data,
3391                                                 data_dma_hndl);
3392                         }
3393 
3394                         free_local_pdev(pdev);
3395 
3396                         return rval;
3397                 }
3398 
3399         default:
3400                 return (-EINVAL);
3401         }
3402 
3403         return 0;
3404 }
3405 
3406 static long
3407 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3408 {
3409         int ret;
3410 
3411         mutex_lock(&megadev_mutex);
3412         ret = megadev_ioctl(filep, cmd, arg);
3413         mutex_unlock(&megadev_mutex);
3414 
3415         return ret;
3416 }
3417 
3418 /**
3419  * mega_m_to_n()
3420  * @arg - user address
3421  * @uioc - new ioctl structure
3422  *
3423  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3424  * structure
3425  *
3426  * Converts the older mimd ioctl structure to newer NIT structure
3427  */
3428 static int
3429 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3430 {
3431         struct uioctl_t uioc_mimd;
3432         char    signature[8] = {0};
3433         u8      opcode;
3434         u8      subopcode;
3435 
3436 
3437         /*
3438          * check is the application conforms to NIT. We do not have to do much
3439          * in that case.
3440          * We exploit the fact that the signature is stored in the very
3441          * beginning of the structure.
3442          */
3443 
3444         if( copy_from_user(signature, arg, 7) )
3445                 return (-EFAULT);
3446 
3447         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3448 
3449                 /*
3450                  * NOTE NOTE: The nit ioctl is still under flux because of
3451                  * change of mailbox definition, in HPE. No applications yet
3452                  * use this interface and let's not have applications use this
3453                  * interface till the new specifitions are in place.
3454                  */
3455                 return -EINVAL;
3456 #if 0
3457                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3458                         return (-EFAULT);
3459                 return 0;
3460 #endif
3461         }
3462 
3463         /*
3464          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3465          *
3466          * Get the user ioctl structure
3467          */
3468         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3469                 return (-EFAULT);
3470 
3471 
3472         /*
3473          * Get the opcode and subopcode for the commands
3474          */
3475         opcode = uioc_mimd.ui.fcs.opcode;
3476         subopcode = uioc_mimd.ui.fcs.subopcode;
3477 
3478         switch (opcode) {
3479         case 0x82:
3480 
3481                 switch (subopcode) {
3482 
3483                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3484                         uioc->opcode = GET_DRIVER_VER;
3485                         uioc->uioc_uaddr = uioc_mimd.data;
3486                         break;
3487 
3488                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3489                         uioc->opcode = GET_N_ADAP;
3490                         uioc->uioc_uaddr = uioc_mimd.data;
3491                         break;
3492 
3493                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3494                         uioc->opcode = GET_ADAP_INFO;
3495                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3496                         uioc->uioc_uaddr = uioc_mimd.data;
3497                         break;
3498 
3499                 default:
3500                         return(-EINVAL);
3501                 }
3502 
3503                 break;
3504 
3505 
3506         case 0x81:
3507 
3508                 uioc->opcode = MBOX_CMD;
3509                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3510 
3511                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3512 
3513                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3514 
3515                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3516                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3517 
3518                 break;
3519 
3520         case 0x80:
3521 
3522                 uioc->opcode = MBOX_CMD;
3523                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3524 
3525                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3526 
3527                 /*
3528                  * Choose the xferlen bigger of input and output data
3529                  */
3530                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3531                         uioc_mimd.outlen : uioc_mimd.inlen;
3532 
3533                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3534                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3535 
3536                 break;
3537 
3538         default:
3539                 return (-EINVAL);
3540 
3541         }
3542 
3543         return 0;
3544 }
3545 
3546 /*
3547  * mega_n_to_m()
3548  * @arg - user address
3549  * @mc - mailbox command
3550  *
3551  * Updates the status information to the application, depending on application
3552  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3553  */
3554 static int
3555 mega_n_to_m(void __user *arg, megacmd_t *mc)
3556 {
3557         nitioctl_t      __user *uiocp;
3558         megacmd_t       __user *umc;
3559         mega_passthru   __user *upthru;
3560         struct uioctl_t __user *uioc_mimd;
3561         char    signature[8] = {0};
3562 
3563         /*
3564          * check is the application conforms to NIT.
3565          */
3566         if( copy_from_user(signature, arg, 7) )
3567                 return -EFAULT;
3568 
3569         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3570 
3571                 uiocp = arg;
3572 
3573                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3574                         return (-EFAULT);
3575 
3576                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3577 
3578                         umc = MBOX_P(uiocp);
3579 
3580                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3581                                 return -EFAULT;
3582 
3583                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3584                                 return (-EFAULT);
3585                 }
3586         }
3587         else {
3588                 uioc_mimd = arg;
3589 
3590                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3591                         return (-EFAULT);
3592 
3593                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3594 
3595                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3596 
3597                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3598                                 return (-EFAULT);
3599 
3600                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3601                                 return (-EFAULT);
3602                 }
3603         }
3604 
3605         return 0;
3606 }
3607 
3608 
3609 /*
3610  * MEGARAID 'FW' commands.
3611  */
3612 
3613 /**
3614  * mega_is_bios_enabled()
3615  * @adapter - pointer to our soft state
3616  *
3617  * issue command to find out if the BIOS is enabled for this controller
3618  */
3619 static int
3620 mega_is_bios_enabled(adapter_t *adapter)
3621 {
3622         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3623         mbox_t  *mbox;
3624         int     ret;
3625 
3626         mbox = (mbox_t *)raw_mbox;
3627 
3628         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3629 
3630         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3631 
3632         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3633 
3634         raw_mbox[0] = IS_BIOS_ENABLED;
3635         raw_mbox[2] = GET_BIOS;
3636 
3637 
3638         ret = issue_scb_block(adapter, raw_mbox);
3639 
3640         return *(char *)adapter->mega_buffer;
3641 }
3642 
3643 
3644 /**
3645  * mega_enum_raid_scsi()
3646  * @adapter - pointer to our soft state
3647  *
3648  * Find out what channels are RAID/SCSI. This information is used to
3649  * differentiate the virtual channels and physical channels and to support
3650  * ROMB feature and non-disk devices.
3651  */
3652 static void
3653 mega_enum_raid_scsi(adapter_t *adapter)
3654 {
3655         unsigned char raw_mbox[sizeof(struct mbox_out)];
3656         mbox_t *mbox;
3657         int i;
3658 
3659         mbox = (mbox_t *)raw_mbox;
3660 
3661         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3662 
3663         /*
3664          * issue command to find out what channels are raid/scsi
3665          */
3666         raw_mbox[0] = CHNL_CLASS;
3667         raw_mbox[2] = GET_CHNL_CLASS;
3668 
3669         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3670 
3671         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3672 
3673         /*
3674          * Non-ROMB firmware fail this command, so all channels
3675          * must be shown RAID
3676          */
3677         adapter->mega_ch_class = 0xFF;
3678 
3679         if(!issue_scb_block(adapter, raw_mbox)) {
3680                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3681 
3682         }
3683 
3684         for( i = 0; i < adapter->product_info.nchannels; i++ ) { 
3685                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3686                         printk(KERN_INFO "megaraid: channel[%d] is raid.\n",
3687                                         i);
3688                 }
3689                 else {
3690                         printk(KERN_INFO "megaraid: channel[%d] is scsi.\n",
3691                                         i);
3692                 }
3693         }
3694 
3695         return;
3696 }
3697 
3698 
3699 /**
3700  * mega_get_boot_drv()
3701  * @adapter - pointer to our soft state
3702  *
3703  * Find out which device is the boot device. Note, any logical drive or any
3704  * phyical device (e.g., a CDROM) can be designated as a boot device.
3705  */
3706 static void
3707 mega_get_boot_drv(adapter_t *adapter)
3708 {
3709         struct private_bios_data        *prv_bios_data;
3710         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3711         mbox_t  *mbox;
3712         u16     cksum = 0;
3713         u8      *cksum_p;
3714         u8      boot_pdrv;
3715         int     i;
3716 
3717         mbox = (mbox_t *)raw_mbox;
3718 
3719         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3720 
3721         raw_mbox[0] = BIOS_PVT_DATA;
3722         raw_mbox[2] = GET_BIOS_PVT_DATA;
3723 
3724         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3725 
3726         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3727 
3728         adapter->boot_ldrv_enabled = 0;
3729         adapter->boot_ldrv = 0;
3730 
3731         adapter->boot_pdrv_enabled = 0;
3732         adapter->boot_pdrv_ch = 0;
3733         adapter->boot_pdrv_tgt = 0;
3734 
3735         if(issue_scb_block(adapter, raw_mbox) == 0) {
3736                 prv_bios_data =
3737                         (struct private_bios_data *)adapter->mega_buffer;
3738 
3739                 cksum = 0;
3740                 cksum_p = (char *)prv_bios_data;
3741                 for (i = 0; i < 14; i++ ) {
3742                         cksum += (u16)(*cksum_p++);
3743                 }
3744 
3745                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3746 
3747                         /*
3748                          * If MSB is set, a physical drive is set as boot
3749                          * device
3750                          */
3751                         if( prv_bios_data->boot_drv & 0x80 ) {
3752                                 adapter->boot_pdrv_enabled = 1;
3753                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3754                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3755                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3756                         }
3757                         else {
3758                                 adapter->boot_ldrv_enabled = 1;
3759                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3760                         }
3761                 }
3762         }
3763 
3764 }
3765 
3766 /**
3767  * mega_support_random_del()
3768  * @adapter - pointer to our soft state
3769  *
3770  * Find out if this controller supports random deletion and addition of
3771  * logical drives
3772  */
3773 static int
3774 mega_support_random_del(adapter_t *adapter)
3775 {
3776         unsigned char raw_mbox[sizeof(struct mbox_out)];
3777         mbox_t *mbox;
3778         int rval;
3779 
3780         mbox = (mbox_t *)raw_mbox;
3781 
3782         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3783 
3784         /*
3785          * issue command
3786          */
3787         raw_mbox[0] = FC_DEL_LOGDRV;
3788         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3789 
3790         rval = issue_scb_block(adapter, raw_mbox);
3791 
3792         return !rval;
3793 }
3794 
3795 
3796 /**
3797  * mega_support_ext_cdb()
3798  * @adapter - pointer to our soft state
3799  *
3800  * Find out if this firmware support cdblen > 10
3801  */
3802 static int
3803 mega_support_ext_cdb(adapter_t *adapter)
3804 {
3805         unsigned char raw_mbox[sizeof(struct mbox_out)];
3806         mbox_t *mbox;
3807         int rval;
3808 
3809         mbox = (mbox_t *)raw_mbox;
3810 
3811         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3812         /*
3813          * issue command to find out if controller supports extended CDBs.
3814          */
3815         raw_mbox[0] = 0xA4;
3816         raw_mbox[2] = 0x16;
3817 
3818         rval = issue_scb_block(adapter, raw_mbox);
3819 
3820         return !rval;
3821 }
3822 
3823 
3824 /**
3825  * mega_del_logdrv()
3826  * @adapter - pointer to our soft state
3827  * @logdrv - logical drive to be deleted
3828  *
3829  * Delete the specified logical drive. It is the responsibility of the user
3830  * app to let the OS know about this operation.
3831  */
3832 static int
3833 mega_del_logdrv(adapter_t *adapter, int logdrv)
3834 {
3835         unsigned long flags;
3836         scb_t *scb;
3837         int rval;
3838 
3839         /*
3840          * Stop sending commands to the controller, queue them internally.
3841          * When deletion is complete, ISR will flush the queue.
3842          */
3843         atomic_set(&adapter->quiescent, 1);
3844 
3845         /*
3846          * Wait till all the issued commands are complete and there are no
3847          * commands in the pending queue
3848          */
3849         while (atomic_read(&adapter->pend_cmds) > 0 ||
3850                !list_empty(&adapter->pending_list))
3851                 msleep(1000);   /* sleep for 1s */
3852 
3853         rval = mega_do_del_logdrv(adapter, logdrv);
3854 
3855         spin_lock_irqsave(&adapter->lock, flags);
3856 
3857         /*
3858          * If delete operation was successful, add 0x80 to the logical drive
3859          * ids for commands in the pending queue.
3860          */
3861         if (adapter->read_ldidmap) {
3862                 struct list_head *pos;
3863                 list_for_each(pos, &adapter->pending_list) {
3864                         scb = list_entry(pos, scb_t, list);
3865                         if (scb->pthru->logdrv < 0x80 )
3866                                 scb->pthru->logdrv += 0x80;
3867                 }
3868         }
3869 
3870         atomic_set(&adapter->quiescent, 0);
3871 
3872         mega_runpendq(adapter);
3873 
3874         spin_unlock_irqrestore(&adapter->lock, flags);
3875 
3876         return rval;
3877 }
3878 
3879 
3880 static int
3881 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3882 {
3883         megacmd_t       mc;
3884         int     rval;
3885 
3886         memset( &mc, 0, sizeof(megacmd_t));
3887 
3888         mc.cmd = FC_DEL_LOGDRV;
3889         mc.opcode = OP_DEL_LOGDRV;
3890         mc.subopcode = logdrv;
3891 
3892         rval = mega_internal_command(adapter, &mc, NULL);
3893 
3894         /* log this event */
3895         if(rval) {
3896                 printk(KERN_WARNING "megaraid: Delete LD-%d failed.", logdrv);
3897                 return rval;
3898         }
3899 
3900         /*
3901          * After deleting first logical drive, the logical drives must be
3902          * addressed by adding 0x80 to the logical drive id.
3903          */
3904         adapter->read_ldidmap = 1;
3905 
3906         return rval;
3907 }
3908 
3909 
3910 /**
3911  * mega_get_max_sgl()
3912  * @adapter - pointer to our soft state
3913  *
3914  * Find out the maximum number of scatter-gather elements supported by this
3915  * version of the firmware
3916  */
3917 static void
3918 mega_get_max_sgl(adapter_t *adapter)
3919 {
3920         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3921         mbox_t  *mbox;
3922 
3923         mbox = (mbox_t *)raw_mbox;
3924 
3925         memset(mbox, 0, sizeof(raw_mbox));
3926 
3927         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3928 
3929         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3930 
3931         raw_mbox[0] = MAIN_MISC_OPCODE;
3932         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3933 
3934 
3935         if( issue_scb_block(adapter, raw_mbox) ) {
3936                 /*
3937                  * f/w does not support this command. Choose the default value
3938                  */
3939                 adapter->sglen = MIN_SGLIST;
3940         }
3941         else {
3942                 adapter->sglen = *((char *)adapter->mega_buffer);
3943                 
3944                 /*
3945                  * Make sure this is not more than the resources we are
3946                  * planning to allocate
3947                  */
3948                 if ( adapter->sglen > MAX_SGLIST )
3949                         adapter->sglen = MAX_SGLIST;
3950         }
3951 
3952         return;
3953 }
3954 
3955 
3956 /**
3957  * mega_support_cluster()
3958  * @adapter - pointer to our soft state
3959  *
3960  * Find out if this firmware support cluster calls.
3961  */
3962 static int
3963 mega_support_cluster(adapter_t *adapter)
3964 {
3965         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3966         mbox_t  *mbox;
3967 
3968         mbox = (mbox_t *)raw_mbox;
3969 
3970         memset(mbox, 0, sizeof(raw_mbox));
3971 
3972         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3973 
3974         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3975 
3976         /*
3977          * Try to get the initiator id. This command will succeed iff the
3978          * clustering is available on this HBA.
3979          */
3980         raw_mbox[0] = MEGA_GET_TARGET_ID;
3981 
3982         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3983 
3984                 /*
3985                  * Cluster support available. Get the initiator target id.
3986                  * Tell our id to mid-layer too.
3987                  */
3988                 adapter->this_id = *(u32 *)adapter->mega_buffer;
3989                 adapter->host->this_id = adapter->this_id;
3990 
3991                 return 1;
3992         }
3993 
3994         return 0;
3995 }
3996 
3997 #ifdef CONFIG_PROC_FS
3998 /**
3999  * mega_adapinq()
4000  * @adapter - pointer to our soft state
4001  * @dma_handle - DMA address of the buffer
4002  *
4003  * Issue internal commands while interrupts are available.
4004  * We only issue direct mailbox commands from within the driver. ioctl()
4005  * interface using these routines can issue passthru commands.
4006  */
4007 static int
4008 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
4009 {
4010         megacmd_t       mc;
4011 
4012         memset(&mc, 0, sizeof(megacmd_t));
4013 
4014         if( adapter->flag & BOARD_40LD ) {
4015                 mc.cmd = FC_NEW_CONFIG;
4016                 mc.opcode = NC_SUBOP_ENQUIRY3;
4017                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
4018         }
4019         else {
4020                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
4021         }
4022 
4023         mc.xferaddr = (u32)dma_handle;
4024 
4025         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
4026                 return -1;
4027         }
4028 
4029         return 0;
4030 }
4031 
4032 
4033 /** mega_internal_dev_inquiry()
4034  * @adapter - pointer to our soft state
4035  * @ch - channel for this device
4036  * @tgt - ID of this device
4037  * @buf_dma_handle - DMA address of the buffer
4038  *
4039  * Issue the scsi inquiry for the specified device.
4040  */
4041 static int
4042 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4043                 dma_addr_t buf_dma_handle)
4044 {
4045         mega_passthru   *pthru;
4046         dma_addr_t      pthru_dma_handle;
4047         megacmd_t       mc;
4048         int             rval;
4049         struct pci_dev  *pdev;
4050 
4051 
4052         /*
4053          * For all internal commands, the buffer must be allocated in <4GB
4054          * address range
4055          */
4056         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4057 
4058         pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
4059                         &pthru_dma_handle);
4060 
4061         if( pthru == NULL ) {
4062                 free_local_pdev(pdev);
4063                 return -1;
4064         }
4065 
4066         pthru->timeout = 2;
4067         pthru->ars = 1;
4068         pthru->reqsenselen = 14;
4069         pthru->islogical = 0;
4070 
4071         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4072 
4073         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4074 
4075         pthru->cdblen = 6;
4076 
4077         pthru->cdb[0] = INQUIRY;
4078         pthru->cdb[1] = 0;
4079         pthru->cdb[2] = 0;
4080         pthru->cdb[3] = 0;
4081         pthru->cdb[4] = 255;
4082         pthru->cdb[5] = 0;
4083 
4084 
4085         pthru->dataxferaddr = (u32)buf_dma_handle;
4086         pthru->dataxferlen = 256;
4087 
4088         memset(&mc, 0, sizeof(megacmd_t));
4089 
4090         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4091         mc.xferaddr = (u32)pthru_dma_handle;
4092 
4093         rval = mega_internal_command(adapter, &mc, pthru);
4094 
4095         pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
4096                         pthru_dma_handle);
4097 
4098         free_local_pdev(pdev);
4099 
4100         return rval;
4101 }
4102 #endif
4103 
4104 /**
4105  * mega_internal_command()
4106  * @adapter - pointer to our soft state
4107  * @mc - the mailbox command
4108  * @pthru - Passthru structure for DCDB commands
4109  *
4110  * Issue the internal commands in interrupt mode.
4111  * The last argument is the address of the passthru structure if the command
4112  * to be fired is a passthru command
4113  *
4114  * Note: parameter 'pthru' is null for non-passthru commands.
4115  */
4116 static int
4117 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4118 {
4119         unsigned long flags;
4120         scb_t   *scb;
4121         int     rval;
4122 
4123         /*
4124          * The internal commands share one command id and hence are
4125          * serialized. This is so because we want to reserve maximum number of
4126          * available command ids for the I/O commands.
4127          */
4128         mutex_lock(&adapter->int_mtx);
4129 
4130         scb = &adapter->int_scb;
4131         memset(scb, 0, sizeof(scb_t));
4132 
4133         scb->idx = CMDID_INT_CMDS;
4134         scb->state |= SCB_ACTIVE | SCB_PENDQ;
4135 
4136         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4137 
4138         /*
4139          * Is it a passthru command
4140          */
4141         if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4142                 scb->pthru = pthru;
4143 
4144         spin_lock_irqsave(&adapter->lock, flags);
4145         list_add_tail(&scb->list, &adapter->pending_list);
4146         /*
4147          * Check if the HBA is in quiescent state, e.g., during a
4148          * delete logical drive opertion. If it is, don't run
4149          * the pending_list.
4150          */
4151         if (atomic_read(&adapter->quiescent) == 0)
4152                 mega_runpendq(adapter);
4153         spin_unlock_irqrestore(&adapter->lock, flags);
4154 
4155         wait_for_completion(&adapter->int_waitq);
4156 
4157         mc->status = rval = adapter->int_status;
4158 
4159         /*
4160          * Print a debug message for all failed commands. Applications can use
4161          * this information.
4162          */
4163         if (rval && trace_level) {
4164                 printk("megaraid: cmd [%x, %x, %x] status:[%x]\n",
4165                         mc->cmd, mc->opcode, mc->subopcode, rval);
4166         }
4167 
4168         mutex_unlock(&adapter->int_mtx);
4169         return rval;
4170 }
4171 
4172 static struct scsi_host_template megaraid_template = {
4173         .module                         = THIS_MODULE,
4174         .name                           = "MegaRAID",
4175         .proc_name                      = "megaraid_legacy",
4176         .info                           = megaraid_info,
4177         .queuecommand                   = megaraid_queue,       
4178         .bios_param                     = megaraid_biosparam,
4179         .max_sectors                    = MAX_SECTORS_PER_IO,
4180         .can_queue                      = MAX_COMMANDS,
4181         .this_id                        = DEFAULT_INITIATOR_ID,
4182         .sg_tablesize                   = MAX_SGLIST,
4183         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4184         .use_clustering                 = ENABLE_CLUSTERING,
4185         .eh_abort_handler               = megaraid_abort,
4186         .eh_device_reset_handler        = megaraid_reset,
4187         .eh_bus_reset_handler           = megaraid_reset,
4188         .eh_host_reset_handler          = megaraid_reset,
4189         .no_write_same                  = 1,
4190 };
4191 
4192 static int
4193 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4194 {
4195         struct Scsi_Host *host;
4196         adapter_t *adapter;
4197         unsigned long mega_baseport, tbase, flag = 0;
4198         u16 subsysid, subsysvid;
4199         u8 pci_bus, pci_dev_func;
4200         int irq, i, j;
4201         int error = -ENODEV;
4202 
4203         if (pci_enable_device(pdev))
4204                 goto out;
4205         pci_set_master(pdev);
4206 
4207         pci_bus = pdev->bus->number;
4208         pci_dev_func = pdev->devfn;
4209 
4210         /*
4211          * The megaraid3 stuff reports the ID of the Intel part which is not
4212          * remotely specific to the megaraid
4213          */
4214         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4215                 u16 magic;
4216                 /*
4217                  * Don't fall over the Compaq management cards using the same
4218                  * PCI identifier
4219                  */
4220                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4221                     pdev->subsystem_device == 0xC000)
4222                         return -ENODEV;
4223                 /* Now check the magic signature byte */
4224                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4225                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4226                         return -ENODEV;
4227                 /* Ok it is probably a megaraid */
4228         }
4229 
4230         /*
4231          * For these vendor and device ids, signature offsets are not
4232          * valid and 64 bit is implicit
4233          */
4234         if (id->driver_data & BOARD_64BIT)
4235                 flag |= BOARD_64BIT;
4236         else {
4237                 u32 magic64;
4238 
4239                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4240                 if (magic64 == HBA_SIGNATURE_64BIT)
4241                         flag |= BOARD_64BIT;
4242         }
4243 
4244         subsysvid = pdev->subsystem_vendor;
4245         subsysid = pdev->subsystem_device;
4246 
4247         printk(KERN_NOTICE "megaraid: found 0x%4.04x:0x%4.04x:bus %d:",
4248                 id->vendor, id->device, pci_bus);
4249 
4250         printk("slot %d:func %d\n",
4251                 PCI_SLOT(pci_dev_func), PCI_FUNC(pci_dev_func));
4252 
4253         /* Read the base port and IRQ from PCI */
4254         mega_baseport = pci_resource_start(pdev, 0);
4255         irq = pdev->irq;
4256 
4257         tbase = mega_baseport;
4258         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4259                 flag |= BOARD_MEMMAP;
4260 
4261                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4262                         printk(KERN_WARNING "megaraid: mem region busy!\n");
4263                         goto out_disable_device;
4264                 }
4265 
4266                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4267                 if (!mega_baseport) {
4268                         printk(KERN_WARNING
4269                                "megaraid: could not map hba memory\n");
4270                         goto out_release_region;
4271                 }
4272         } else {
4273                 flag |= BOARD_IOMAP;
4274                 mega_baseport += 0x10;
4275 
4276                 if (!request_region(mega_baseport, 16, "megaraid"))
4277                         goto out_disable_device;
4278         }
4279 
4280         /* Initialize SCSI Host structure */
4281         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4282         if (!host)
4283                 goto out_iounmap;
4284 
4285         adapter = (adapter_t *)host->hostdata;
4286         memset(adapter, 0, sizeof(adapter_t));
4287 
4288         printk(KERN_NOTICE
4289                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4290                 host->host_no, mega_baseport, irq);
4291 
4292         adapter->base = mega_baseport;
4293         if (flag & BOARD_MEMMAP)
4294                 adapter->mmio_base = (void __iomem *) mega_baseport;
4295 
4296         INIT_LIST_HEAD(&adapter->free_list);
4297         INIT_LIST_HEAD(&adapter->pending_list);
4298         INIT_LIST_HEAD(&adapter->completed_list);
4299 
4300         adapter->flag = flag;
4301         spin_lock_init(&adapter->lock);
4302 
4303         host->cmd_per_lun = max_cmd_per_lun;
4304         host->max_sectors = max_sectors_per_io;
4305 
4306         adapter->dev = pdev;
4307         adapter->host = host;
4308 
4309         adapter->host->irq = irq;
4310 
4311         if (flag & BOARD_MEMMAP)
4312                 adapter->host->base = tbase;
4313         else {
4314                 adapter->host->io_port = tbase;
4315                 adapter->host->n_io_port = 16;
4316         }
4317 
4318         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4319 
4320         /*
4321          * Allocate buffer to issue internal commands.
4322          */
4323         adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
4324                 MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
4325         if (!adapter->mega_buffer) {
4326                 printk(KERN_WARNING "megaraid: out of RAM.\n");
4327                 goto out_host_put;
4328         }
4329 
4330         adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
4331         if (!adapter->scb_list) {
4332                 printk(KERN_WARNING "megaraid: out of RAM.\n");
4333                 goto out_free_cmd_buffer;
4334         }
4335 
4336         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4337                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4338                                         IRQF_SHARED, "megaraid", adapter)) {
4339                 printk(KERN_WARNING
4340                         "megaraid: Couldn't register IRQ %d!\n", irq);
4341                 goto out_free_scb_list;
4342         }
4343 
4344         if (mega_setup_mailbox(adapter))
4345                 goto out_free_irq;
4346 
4347         if (mega_query_adapter(adapter))
4348                 goto out_free_mbox;
4349 
4350         /*
4351          * Have checks for some buggy f/w
4352          */
4353         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4354                 /*
4355                  * Which firmware
4356                  */
4357                 if (!strcmp(adapter->fw_version, "3.00") ||
4358                                 !strcmp(adapter->fw_version, "3.01")) {
4359 
4360                         printk( KERN_WARNING
4361                                 "megaraid: Your  card is a Dell PERC "
4362                                 "2/SC RAID controller with  "
4363                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4364                                 "This driver is known to have "
4365                                 "corruption issues\nmegaraid: with "
4366                                 "those firmware versions on this "
4367                                 "specific card.  In order\nmegaraid: "
4368                                 "to protect your data, please upgrade "
4369                                 "your firmware to version\nmegaraid: "
4370                                 "3.10 or later, available from the "
4371                                 "Dell Technical Support web\n"
4372                                 "megaraid: site at\nhttp://support."
4373                                 "dell.com/us/en/filelib/download/"
4374                                 "index.asp?fileid=2940\n"
4375                         );
4376                 }
4377         }
4378 
4379         /*
4380          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4381          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4382          * support, since this firmware cannot handle 64 bit
4383          * addressing
4384          */
4385         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4386             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4387                 /*
4388                  * which firmware
4389                  */
4390                 if (!strcmp(adapter->fw_version, "H01.07") ||
4391                     !strcmp(adapter->fw_version, "H01.08") ||
4392                     !strcmp(adapter->fw_version, "H01.09") ) {
4393                         printk(KERN_WARNING
4394                                 "megaraid: Firmware H.01.07, "
4395                                 "H.01.08, and H.01.09 on 1M/2M "
4396                                 "controllers\n"
4397                                 "megaraid: do not support 64 bit "
4398                                 "addressing.\nmegaraid: DISABLING "
4399                                 "64 bit support.\n");
4400                         adapter->flag &= ~BOARD_64BIT;
4401                 }
4402         }
4403 
4404         if (mega_is_bios_enabled(adapter))
4405                 mega_hbas[hba_count].is_bios_enabled = 1;
4406         mega_hbas[hba_count].hostdata_addr = adapter;
4407 
4408         /*
4409          * Find out which channel is raid and which is scsi. This is
4410          * for ROMB support.
4411          */
4412         mega_enum_raid_scsi(adapter);
4413 
4414         /*
4415          * Find out if a logical drive is set as the boot drive. If
4416          * there is one, will make that as the first logical drive.
4417          * ROMB: Do we have to boot from a physical drive. Then all
4418          * the physical drives would appear before the logical disks.
4419          * Else, all the physical drives would be exported to the mid
4420          * layer after logical drives.
4421          */
4422         mega_get_boot_drv(adapter);
4423 
4424         if (adapter->boot_pdrv_enabled) {
4425                 j = adapter->product_info.nchannels;
4426                 for( i = 0; i < j; i++ )
4427                         adapter->logdrv_chan[i] = 0;
4428                 for( i = j; i < NVIRT_CHAN + j; i++ )
4429                         adapter->logdrv_chan[i] = 1;
4430         } else {
4431                 for (i = 0; i < NVIRT_CHAN; i++)
4432                         adapter->logdrv_chan[i] = 1;
4433                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4434                         adapter->logdrv_chan[i] = 0;
4435                 adapter->mega_ch_class <<= NVIRT_CHAN;
4436         }
4437 
4438         /*
4439          * Do we support random deletion and addition of logical
4440          * drives
4441          */
4442         adapter->read_ldidmap = 0;      /* set it after first logdrv
4443                                                    delete cmd */
4444         adapter->support_random_del = mega_support_random_del(adapter);
4445 
4446         /* Initialize SCBs */
4447         if (mega_init_scb(adapter))
4448                 goto out_free_mbox;
4449 
4450         /*
4451          * Reset the pending commands counter
4452          */
4453         atomic_set(&adapter->pend_cmds, 0);
4454 
4455         /*
4456          * Reset the adapter quiescent flag
4457          */
4458         atomic_set(&adapter->quiescent, 0);
4459 
4460         hba_soft_state[hba_count] = adapter;
4461 
4462         /*
4463          * Fill in the structure which needs to be passed back to the
4464          * application when it does an ioctl() for controller related
4465          * information.
4466          */
4467         i = hba_count;
4468 
4469         mcontroller[i].base = mega_baseport;
4470         mcontroller[i].irq = irq;
4471         mcontroller[i].numldrv = adapter->numldrv;
4472         mcontroller[i].pcibus = pci_bus;
4473         mcontroller[i].pcidev = id->device;
4474         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4475         mcontroller[i].pciid = -1;
4476         mcontroller[i].pcivendor = id->vendor;
4477         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4478         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4479 
4480 
4481         /* Set the Mode of addressing to 64 bit if we can */
4482         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4483                 pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4484                 adapter->has_64bit_addr = 1;
4485         } else  {
4486                 pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4487                 adapter->has_64bit_addr = 0;
4488         }
4489                 
4490         mutex_init(&adapter->int_mtx);
4491         init_completion(&adapter->int_waitq);
4492 
4493         adapter->this_id = DEFAULT_INITIATOR_ID;
4494         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4495 
4496 #if MEGA_HAVE_CLUSTERING
4497         /*
4498          * Is cluster support enabled on this controller
4499          * Note: In a cluster the HBAs ( the initiators ) will have
4500          * different target IDs and we cannot assume it to be 7. Call
4501          * to mega_support_cluster() will get the target ids also if
4502          * the cluster support is available
4503          */
4504         adapter->has_cluster = mega_support_cluster(adapter);
4505         if (adapter->has_cluster) {
4506                 printk(KERN_NOTICE
4507                         "megaraid: Cluster driver, initiator id:%d\n",
4508                         adapter->this_id);
4509         }
4510 #endif
4511 
4512         pci_set_drvdata(pdev, host);
4513 
4514         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4515 
4516         error = scsi_add_host(host, &pdev->dev);
4517         if (error)
4518                 goto out_free_mbox;
4519 
4520         scsi_scan_host(host);
4521         hba_count++;
4522         return 0;
4523 
4524  out_free_mbox:
4525         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4526                         adapter->una_mbox64, adapter->una_mbox64_dma);
4527  out_free_irq:
4528         free_irq(adapter->host->irq, adapter);
4529  out_free_scb_list:
4530         kfree(adapter->scb_list);
4531  out_free_cmd_buffer:
4532         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4533                         adapter->mega_buffer, adapter->buf_dma_handle);
4534  out_host_put:
4535         scsi_host_put(host);
4536  out_iounmap:
4537         if (flag & BOARD_MEMMAP)
4538                 iounmap((void *)mega_baseport);
4539  out_release_region:
4540         if (flag & BOARD_MEMMAP)
4541                 release_mem_region(tbase, 128);
4542         else
4543                 release_region(mega_baseport, 16);
4544  out_disable_device:
4545         pci_disable_device(pdev);
4546  out:
4547         return error;
4548 }
4549 
4550 static void
4551 __megaraid_shutdown(adapter_t *adapter)
4552 {
4553         u_char  raw_mbox[sizeof(struct mbox_out)];
4554         mbox_t  *mbox = (mbox_t *)raw_mbox;
4555         int     i;
4556 
4557         /* Flush adapter cache */
4558         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4559         raw_mbox[0] = FLUSH_ADAPTER;
4560 
4561         free_irq(adapter->host->irq, adapter);
4562 
4563         /* Issue a blocking (interrupts disabled) command to the card */
4564         issue_scb_block(adapter, raw_mbox);
4565 
4566         /* Flush disks cache */
4567         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4568         raw_mbox[0] = FLUSH_SYSTEM;
4569 
4570         /* Issue a blocking (interrupts disabled) command to the card */
4571         issue_scb_block(adapter, raw_mbox);
4572         
4573         if (atomic_read(&adapter->pend_cmds) > 0)
4574                 printk(KERN_WARNING "megaraid: pending commands!!\n");
4575 
4576         /*
4577          * Have a delibrate delay to make sure all the caches are
4578          * actually flushed.
4579          */
4580         for (i = 0; i <= 10; i++)
4581                 mdelay(1000);
4582 }
4583 
4584 static void
4585 megaraid_remove_one(struct pci_dev *pdev)
4586 {
4587         struct Scsi_Host *host = pci_get_drvdata(pdev);
4588         adapter_t *adapter = (adapter_t *)host->hostdata;
4589 
4590         scsi_remove_host(host);
4591 
4592         __megaraid_shutdown(adapter);
4593 
4594         /* Free our resources */
4595         if (adapter->flag & BOARD_MEMMAP) {
4596                 iounmap((void *)adapter->base);
4597                 release_mem_region(adapter->host->base, 128);
4598         } else
4599                 release_region(adapter->base, 16);
4600 
4601         mega_free_sgl(adapter);
4602 
4603 #ifdef CONFIG_PROC_FS
4604         if (adapter->controller_proc_dir_entry) {
4605                 remove_proc_entry("stat", adapter->controller_proc_dir_entry);
4606                 remove_proc_entry("config",
4607                                 adapter->controller_proc_dir_entry);
4608                 remove_proc_entry("mailbox",
4609                                 adapter->controller_proc_dir_entry);
4610 #if MEGA_HAVE_ENH_PROC
4611                 remove_proc_entry("rebuild-rate",
4612                                 adapter->controller_proc_dir_entry);
4613                 remove_proc_entry("battery-status",
4614                                 adapter->controller_proc_dir_entry);
4615 
4616                 remove_proc_entry("diskdrives-ch0",
4617                                 adapter->controller_proc_dir_entry);
4618                 remove_proc_entry("diskdrives-ch1",
4619                                 adapter->controller_proc_dir_entry);
4620                 remove_proc_entry("diskdrives-ch2",
4621                                 adapter->controller_proc_dir_entry);
4622                 remove_proc_entry("diskdrives-ch3",
4623                                 adapter->controller_proc_dir_entry);
4624 
4625                 remove_proc_entry("raiddrives-0-9",
4626                                 adapter->controller_proc_dir_entry);
4627                 remove_proc_entry("raiddrives-10-19",
4628                                 adapter->controller_proc_dir_entry);
4629                 remove_proc_entry("raiddrives-20-29",
4630                                 adapter->controller_proc_dir_entry);
4631                 remove_proc_entry("raiddrives-30-39",
4632                                 adapter->controller_proc_dir_entry);
4633 #endif
4634                 {
4635                         char    buf[12] = { 0 };
4636                         sprintf(buf, "hba%d", adapter->host->host_no);
4637                         remove_proc_entry(buf, mega_proc_dir_entry);
4638                 }
4639         }
4640 #endif
4641 
4642         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4643                         adapter->mega_buffer, adapter->buf_dma_handle);
4644         kfree(adapter->scb_list);
4645         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4646                         adapter->una_mbox64, adapter->una_mbox64_dma);
4647 
4648         scsi_host_put(host);
4649         pci_disable_device(pdev);
4650 
4651         hba_count--;
4652 }
4653 
4654 static void
4655 megaraid_shutdown(struct pci_dev *pdev)
4656 {
4657         struct Scsi_Host *host = pci_get_drvdata(pdev);
4658         adapter_t *adapter = (adapter_t *)host->hostdata;
4659 
4660         __megaraid_shutdown(adapter);
4661 }
4662 
4663 static struct pci_device_id megaraid_pci_tbl[] = {
4664         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4665                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4666         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4667                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4668         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4669                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4670         {0,}
4671 };
4672 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4673 
4674 static struct pci_driver megaraid_pci_driver = {
4675         .name           = "megaraid_legacy",
4676         .id_table       = megaraid_pci_tbl,
4677         .probe          = megaraid_probe_one,
4678         .remove         = megaraid_remove_one,
4679         .shutdown       = megaraid_shutdown,
4680 };
4681 
4682 static int __init megaraid_init(void)
4683 {
4684         int error;
4685 
4686         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4687                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4688         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4689                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4690 
4691 #ifdef CONFIG_PROC_FS
4692         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4693         if (!mega_proc_dir_entry) {
4694                 printk(KERN_WARNING
4695                                 "megaraid: failed to create megaraid root\n");
4696         }
4697 #endif
4698         error = pci_register_driver(&megaraid_pci_driver);
4699         if (error) {
4700 #ifdef CONFIG_PROC_FS
4701                 remove_proc_entry("megaraid", NULL);
4702 #endif
4703                 return error;
4704         }
4705 
4706         /*
4707          * Register the driver as a character device, for applications
4708          * to access it for ioctls.
4709          * First argument (major) to register_chrdev implies a dynamic
4710          * major number allocation.
4711          */
4712         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4713         if (!major) {
4714                 printk(KERN_WARNING
4715                                 "megaraid: failed to register char device\n");
4716         }
4717 
4718         return 0;
4719 }
4720 
4721 static void __exit megaraid_exit(void)
4722 {
4723         /*
4724          * Unregister the character device interface to the driver.
4725          */
4726         unregister_chrdev(major, "megadev_legacy");
4727 
4728         pci_unregister_driver(&megaraid_pci_driver);
4729 
4730 #ifdef CONFIG_PROC_FS
4731         remove_proc_entry("megaraid", NULL);
4732 #endif
4733 }
4734 
4735 module_init(megaraid_init);
4736 module_exit(megaraid_exit);
4737 
4738 /* vi: set ts=8 sw=8 tw=78: */
4739 

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