Version:  2.0.40 2.2.26 2.4.37 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7

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                         dev_warn(&adapter->dev->dev,
272                                 "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         dev_notice(&adapter->dev->dev, "[%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                 dev_notice(&adapter->dev->dev, "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                                 dev_notice(&adapter->dev->dev,
682                                         "scsi%d: scanning scsi channel %d "
683                                         "for logical drives\n",
684                                                 adapter->host->host_no,
685                                                 cmd->device->channel);
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                         dev_notice(&adapter->dev->dev,
987                                 "scsi%d: scanning scsi channel %d [P%d] "
988                                 "for physical devices\n",
989                                         adapter->host->host_no,
990                                         cmd->device->channel, channel);
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                         dev_notice(&adapter->dev->dev,
1049                                 "scsi%d: scanning scsi channel %d [P%d] "
1050                                 "for physical devices\n",
1051                                         adapter->host->host_no,
1052                                         cmd->device->channel, channel);
1053 
1054                         adapter->flag |= (1L << cmd->device->channel);
1055                 }
1056                 /* 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         dev_warn(&adapter->dev->dev, "Blocked mailbox......!!\n");
1245         udelay (1000);
1246         return -1;
1247 }
1248 
1249 
1250 /**
1251  * megaraid_isr_iomapped()
1252  * @irq - irq
1253  * @devp - pointer to our soft state
1254  *
1255  * Interrupt service routine for io-mapped controllers.
1256  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1257  * and service the completed commands.
1258  */
1259 static irqreturn_t
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                                 dev_crit(&adapter->dev->dev, "invalid command "
1458                                         "Id %d, scb->state:%x, scsi cmd:%p\n",
1459                                         cmdid, scb->state, scb->cmd);
1460 
1461                                 continue;
1462                         }
1463 
1464                         /*
1465                          * Was a abort issued for this command
1466                          */
1467                         if( scb->state & SCB_ABORT ) {
1468 
1469                                 dev_warn(&adapter->dev->dev,
1470                                         "aborted cmd [%x] complete\n",
1471                                         scb->idx);
1472 
1473                                 scb->cmd->result = (DID_ABORT << 16);
1474 
1475                                 list_add_tail(SCSI_LIST(scb->cmd),
1476                                                 &adapter->completed_list);
1477 
1478                                 mega_free_scb(adapter, scb);
1479 
1480                                 continue;
1481                         }
1482 
1483                         /*
1484                          * Was a reset issued for this command
1485                          */
1486                         if( scb->state & SCB_RESET ) {
1487 
1488                                 dev_warn(&adapter->dev->dev,
1489                                         "reset cmd [%x] complete\n",
1490                                         scb->idx);
1491 
1492                                 scb->cmd->result = (DID_RESET << 16);
1493 
1494                                 list_add_tail(SCSI_LIST(scb->cmd),
1495                                                 &adapter->completed_list);
1496 
1497                                 mega_free_scb (adapter, scb);
1498 
1499                                 continue;
1500                         }
1501 
1502                         cmd = scb->cmd;
1503                         pthru = scb->pthru;
1504                         epthru = scb->epthru;
1505                         mbox = (mbox_t *)scb->raw_mbox;
1506 
1507 #if MEGA_HAVE_STATS
1508                         {
1509 
1510                         int     logdrv = mbox->m_out.logdrv;
1511 
1512                         islogical = adapter->logdrv_chan[cmd->channel];
1513                         /*
1514                          * Maintain an error counter for the logical drive.
1515                          * Some application like SNMP agent need such
1516                          * statistics
1517                          */
1518                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1519                                                 cmd->cmnd[0] == READ_10 ||
1520                                                 cmd->cmnd[0] == READ_12)) {
1521                                 /*
1522                                  * Logical drive number increases by 0x80 when
1523                                  * a logical drive is deleted
1524                                  */
1525                                 adapter->rd_errors[logdrv%0x80]++;
1526                         }
1527 
1528                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1529                                                 cmd->cmnd[0] == WRITE_10 ||
1530                                                 cmd->cmnd[0] == WRITE_12)) {
1531                                 /*
1532                                  * Logical drive number increases by 0x80 when
1533                                  * a logical drive is deleted
1534                                  */
1535                                 adapter->wr_errors[logdrv%0x80]++;
1536                         }
1537 
1538                         }
1539 #endif
1540                 }
1541 
1542                 /*
1543                  * Do not return the presence of hard disk on the channel so,
1544                  * inquiry sent, and returned data==hard disk or removable
1545                  * hard disk and not logical, request should return failure! -
1546                  * PJ
1547                  */
1548                 islogical = adapter->logdrv_chan[cmd->device->channel];
1549                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1550 
1551                         sgl = scsi_sglist(cmd);
1552                         if( sg_page(sgl) ) {
1553                                 c = *(unsigned char *) sg_virt(&sgl[0]);
1554                         } else {
1555                                 dev_warn(&adapter->dev->dev, "invalid sg\n");
1556                                 c = 0;
1557                         }
1558 
1559                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1560                                         ((c & 0x1F ) == TYPE_DISK)) {
1561                                 status = 0xF0;
1562                         }
1563                 }
1564 
1565                 /* clear result; otherwise, success returns corrupt value */
1566                 cmd->result = 0;
1567 
1568                 /* Convert MegaRAID status to Linux error code */
1569                 switch (status) {
1570                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1571                         cmd->result |= (DID_OK << 16);
1572                         break;
1573 
1574                 case 0x02:      /* ERROR_ABORTED, i.e.
1575                                    SCSI_STATUS_CHECK_CONDITION */
1576 
1577                         /* set sense_buffer and result fields */
1578                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1579                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1580 
1581                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1582                                                 14);
1583 
1584                                 cmd->result = (DRIVER_SENSE << 24) |
1585                                         (DID_OK << 16) |
1586                                         (CHECK_CONDITION << 1);
1587                         }
1588                         else {
1589                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1590 
1591                                         memcpy(cmd->sense_buffer,
1592                                                 epthru->reqsensearea, 14);
1593 
1594                                         cmd->result = (DRIVER_SENSE << 24) |
1595                                                 (DID_OK << 16) |
1596                                                 (CHECK_CONDITION << 1);
1597                                 } else {
1598                                         cmd->sense_buffer[0] = 0x70;
1599                                         cmd->sense_buffer[2] = ABORTED_COMMAND;
1600                                         cmd->result |= (CHECK_CONDITION << 1);
1601                                 }
1602                         }
1603                         break;
1604 
1605                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1606                                    SCSI_STATUS_BUSY */
1607                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1608                         break;
1609 
1610                 default:
1611 #if MEGA_HAVE_CLUSTERING
1612                         /*
1613                          * If TEST_UNIT_READY fails, we know
1614                          * MEGA_RESERVATION_STATUS failed
1615                          */
1616                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1617                                 cmd->result |= (DID_ERROR << 16) |
1618                                         (RESERVATION_CONFLICT << 1);
1619                         }
1620                         else
1621                         /*
1622                          * Error code returned is 1 if Reserve or Release
1623                          * failed or the input parameter is invalid
1624                          */
1625                         if( status == 1 &&
1626                                 (cmd->cmnd[0] == RESERVE ||
1627                                          cmd->cmnd[0] == RELEASE) ) {
1628 
1629                                 cmd->result |= (DID_ERROR << 16) |
1630                                         (RESERVATION_CONFLICT << 1);
1631                         }
1632                         else
1633 #endif
1634                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1635                 }
1636 
1637                 mega_free_scb(adapter, scb);
1638 
1639                 /* Add Scsi_Command to end of completed queue */
1640                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1641         }
1642 }
1643 
1644 
1645 /*
1646  * mega_runpendq()
1647  *
1648  * Run through the list of completed requests and finish it
1649  */
1650 static void
1651 mega_rundoneq (adapter_t *adapter)
1652 {
1653         Scsi_Cmnd *cmd;
1654         struct list_head *pos;
1655 
1656         list_for_each(pos, &adapter->completed_list) {
1657 
1658                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1659 
1660                 cmd = list_entry(spos, Scsi_Cmnd, SCp);
1661                 cmd->scsi_done(cmd);
1662         }
1663 
1664         INIT_LIST_HEAD(&adapter->completed_list);
1665 }
1666 
1667 
1668 /*
1669  * Free a SCB structure
1670  * Note: We assume the scsi commands associated with this scb is not free yet.
1671  */
1672 static void
1673 mega_free_scb(adapter_t *adapter, scb_t *scb)
1674 {
1675         switch( scb->dma_type ) {
1676 
1677         case MEGA_DMA_TYPE_NONE:
1678                 break;
1679 
1680         case MEGA_SGLIST:
1681                 scsi_dma_unmap(scb->cmd);
1682                 break;
1683         default:
1684                 break;
1685         }
1686 
1687         /*
1688          * Remove from the pending list
1689          */
1690         list_del_init(&scb->list);
1691 
1692         /* Link the scb back into free list */
1693         scb->state = SCB_FREE;
1694         scb->cmd = NULL;
1695 
1696         list_add(&scb->list, &adapter->free_list);
1697 }
1698 
1699 
1700 static int
1701 __mega_busywait_mbox (adapter_t *adapter)
1702 {
1703         volatile mbox_t *mbox = adapter->mbox;
1704         long counter;
1705 
1706         for (counter = 0; counter < 10000; counter++) {
1707                 if (!mbox->m_in.busy)
1708                         return 0;
1709                 udelay(100);
1710                 cond_resched();
1711         }
1712         return -1;              /* give up after 1 second */
1713 }
1714 
1715 /*
1716  * Copies data to SGLIST
1717  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1718  */
1719 static int
1720 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1721 {
1722         struct scatterlist *sg;
1723         Scsi_Cmnd       *cmd;
1724         int     sgcnt;
1725         int     idx;
1726 
1727         cmd = scb->cmd;
1728 
1729         /*
1730          * Copy Scatter-Gather list info into controller structure.
1731          *
1732          * The number of sg elements returned must not exceed our limit
1733          */
1734         sgcnt = scsi_dma_map(cmd);
1735 
1736         scb->dma_type = MEGA_SGLIST;
1737 
1738         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1739 
1740         *len = 0;
1741 
1742         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1743                 sg = scsi_sglist(cmd);
1744                 scb->dma_h_bulkdata = sg_dma_address(sg);
1745                 *buf = (u32)scb->dma_h_bulkdata;
1746                 *len = sg_dma_len(sg);
1747                 return 0;
1748         }
1749 
1750         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1751                 if (adapter->has_64bit_addr) {
1752                         scb->sgl64[idx].address = sg_dma_address(sg);
1753                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1754                 } else {
1755                         scb->sgl[idx].address = sg_dma_address(sg);
1756                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1757                 }
1758         }
1759 
1760         /* Reset pointer and length fields */
1761         *buf = scb->sgl_dma_addr;
1762 
1763         /* Return count of SG requests */
1764         return sgcnt;
1765 }
1766 
1767 
1768 /*
1769  * mega_8_to_40ld()
1770  *
1771  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1772  * Enquiry3 structures for later use
1773  */
1774 static void
1775 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1776                 mega_product_info *product_info)
1777 {
1778         int i;
1779 
1780         product_info->max_commands = inquiry->adapter_info.max_commands;
1781         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1782         product_info->nchannels = inquiry->adapter_info.nchannels;
1783 
1784         for (i = 0; i < 4; i++) {
1785                 product_info->fw_version[i] =
1786                         inquiry->adapter_info.fw_version[i];
1787 
1788                 product_info->bios_version[i] =
1789                         inquiry->adapter_info.bios_version[i];
1790         }
1791         enquiry3->cache_flush_interval =
1792                 inquiry->adapter_info.cache_flush_interval;
1793 
1794         product_info->dram_size = inquiry->adapter_info.dram_size;
1795 
1796         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1797 
1798         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1799                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1800                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1801                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1802         }
1803 
1804         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1805                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1806 }
1807 
1808 static inline void
1809 mega_free_sgl(adapter_t *adapter)
1810 {
1811         scb_t   *scb;
1812         int     i;
1813 
1814         for(i = 0; i < adapter->max_cmds; i++) {
1815 
1816                 scb = &adapter->scb_list[i];
1817 
1818                 if( scb->sgl64 ) {
1819                         pci_free_consistent(adapter->dev,
1820                                 sizeof(mega_sgl64) * adapter->sglen,
1821                                 scb->sgl64,
1822                                 scb->sgl_dma_addr);
1823 
1824                         scb->sgl64 = NULL;
1825                 }
1826 
1827                 if( scb->pthru ) {
1828                         pci_free_consistent(adapter->dev, sizeof(mega_passthru),
1829                                 scb->pthru, scb->pthru_dma_addr);
1830 
1831                         scb->pthru = NULL;
1832                 }
1833 
1834                 if( scb->epthru ) {
1835                         pci_free_consistent(adapter->dev,
1836                                 sizeof(mega_ext_passthru),
1837                                 scb->epthru, scb->epthru_dma_addr);
1838 
1839                         scb->epthru = NULL;
1840                 }
1841 
1842         }
1843 }
1844 
1845 
1846 /*
1847  * Get information about the card/driver
1848  */
1849 const char *
1850 megaraid_info(struct Scsi_Host *host)
1851 {
1852         static char buffer[512];
1853         adapter_t *adapter;
1854 
1855         adapter = (adapter_t *)host->hostdata;
1856 
1857         sprintf (buffer,
1858                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1859                  adapter->fw_version, adapter->product_info.max_commands,
1860                  adapter->host->max_id, adapter->host->max_channel,
1861                  (u32)adapter->host->max_lun);
1862         return buffer;
1863 }
1864 
1865 /*
1866  * Abort a previous SCSI request. Only commands on the pending list can be
1867  * aborted. All the commands issued to the F/W must complete.
1868  */
1869 static int
1870 megaraid_abort(Scsi_Cmnd *cmd)
1871 {
1872         adapter_t       *adapter;
1873         int             rval;
1874 
1875         adapter = (adapter_t *)cmd->device->host->hostdata;
1876 
1877         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1878 
1879         /*
1880          * This is required here to complete any completed requests
1881          * to be communicated over to the mid layer.
1882          */
1883         mega_rundoneq(adapter);
1884 
1885         return rval;
1886 }
1887 
1888 
1889 static int
1890 megaraid_reset(struct scsi_cmnd *cmd)
1891 {
1892         adapter_t       *adapter;
1893         megacmd_t       mc;
1894         int             rval;
1895 
1896         adapter = (adapter_t *)cmd->device->host->hostdata;
1897 
1898 #if MEGA_HAVE_CLUSTERING
1899         mc.cmd = MEGA_CLUSTER_CMD;
1900         mc.opcode = MEGA_RESET_RESERVATIONS;
1901 
1902         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1903                 dev_warn(&adapter->dev->dev, "reservation reset failed\n");
1904         }
1905         else {
1906                 dev_info(&adapter->dev->dev, "reservation reset\n");
1907         }
1908 #endif
1909 
1910         spin_lock_irq(&adapter->lock);
1911 
1912         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1913 
1914         /*
1915          * This is required here to complete any completed requests
1916          * to be communicated over to the mid layer.
1917          */
1918         mega_rundoneq(adapter);
1919         spin_unlock_irq(&adapter->lock);
1920 
1921         return rval;
1922 }
1923 
1924 /**
1925  * megaraid_abort_and_reset()
1926  * @adapter - megaraid soft state
1927  * @cmd - scsi command to be aborted or reset
1928  * @aor - abort or reset flag
1929  *
1930  * Try to locate the scsi command in the pending queue. If found and is not
1931  * issued to the controller, abort/reset it. Otherwise return failure
1932  */
1933 static int
1934 megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
1935 {
1936         struct list_head        *pos, *next;
1937         scb_t                   *scb;
1938 
1939         dev_warn(&adapter->dev->dev, "%s cmd=%x <c=%d t=%d l=%d>\n",
1940              (aor == SCB_ABORT)? "ABORTING":"RESET",
1941              cmd->cmnd[0], cmd->device->channel,
1942              cmd->device->id, (u32)cmd->device->lun);
1943 
1944         if(list_empty(&adapter->pending_list))
1945                 return FAILED;
1946 
1947         list_for_each_safe(pos, next, &adapter->pending_list) {
1948 
1949                 scb = list_entry(pos, scb_t, list);
1950 
1951                 if (scb->cmd == cmd) { /* Found command */
1952 
1953                         scb->state |= aor;
1954 
1955                         /*
1956                          * Check if this command has firmware ownership. If
1957                          * yes, we cannot reset this command. Whenever f/w
1958                          * completes this command, we will return appropriate
1959                          * status from ISR.
1960                          */
1961                         if( scb->state & SCB_ISSUED ) {
1962 
1963                                 dev_warn(&adapter->dev->dev,
1964                                         "%s[%x], fw owner\n",
1965                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1966                                         scb->idx);
1967 
1968                                 return FAILED;
1969                         }
1970                         else {
1971 
1972                                 /*
1973                                  * Not yet issued! Remove from the pending
1974                                  * list
1975                                  */
1976                                 dev_warn(&adapter->dev->dev,
1977                                         "%s-[%x], driver owner\n",
1978                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1979                                         scb->idx);
1980 
1981                                 mega_free_scb(adapter, scb);
1982 
1983                                 if( aor == SCB_ABORT ) {
1984                                         cmd->result = (DID_ABORT << 16);
1985                                 }
1986                                 else {
1987                                         cmd->result = (DID_RESET << 16);
1988                                 }
1989 
1990                                 list_add_tail(SCSI_LIST(cmd),
1991                                                 &adapter->completed_list);
1992 
1993                                 return SUCCESS;
1994                         }
1995                 }
1996         }
1997 
1998         return FAILED;
1999 }
2000 
2001 static inline int
2002 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2003 {
2004         *pdev = pci_alloc_dev(NULL);
2005 
2006         if( *pdev == NULL ) return -1;
2007 
2008         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2009 
2010         if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
2011                 kfree(*pdev);
2012                 return -1;
2013         }
2014 
2015         return 0;
2016 }
2017 
2018 static inline void
2019 free_local_pdev(struct pci_dev *pdev)
2020 {
2021         kfree(pdev);
2022 }
2023 
2024 /**
2025  * mega_allocate_inquiry()
2026  * @dma_handle - handle returned for dma address
2027  * @pdev - handle to pci device
2028  *
2029  * allocates memory for inquiry structure
2030  */
2031 static inline void *
2032 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2033 {
2034         return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
2035 }
2036 
2037 
2038 static inline void
2039 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2040 {
2041         pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
2042 }
2043 
2044 
2045 #ifdef CONFIG_PROC_FS
2046 /* Following code handles /proc fs  */
2047 
2048 /**
2049  * proc_show_config()
2050  * @m - Synthetic file construction data
2051  * @v - File iterator
2052  *
2053  * Display configuration information about the controller.
2054  */
2055 static int
2056 proc_show_config(struct seq_file *m, void *v)
2057 {
2058 
2059         adapter_t *adapter = m->private;
2060 
2061         seq_puts(m, MEGARAID_VERSION);
2062         if(adapter->product_info.product_name[0])
2063                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2064 
2065         seq_puts(m, "Controller Type: ");
2066 
2067         if( adapter->flag & BOARD_MEMMAP )
2068                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2069         else
2070                 seq_puts(m, "418/428/434\n");
2071 
2072         if(adapter->flag & BOARD_40LD)
2073                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2074 
2075         if(adapter->flag & BOARD_64BIT)
2076                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2077         if( adapter->has_64bit_addr )
2078                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2079         else
2080                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2081 
2082         seq_printf(m, "Base = %08lx, Irq = %d, ",
2083                    adapter->base, adapter->host->irq);
2084 
2085         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2086                    adapter->numldrv, adapter->product_info.nchannels);
2087 
2088         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2089                    adapter->fw_version, adapter->bios_version,
2090                    adapter->product_info.dram_size);
2091 
2092         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2093                    adapter->product_info.max_commands, adapter->max_cmds);
2094 
2095         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2096         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2097         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2098         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2099         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2100         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2101         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2102         seq_printf(m, "quiescent          = %d\n",
2103                    atomic_read(&adapter->quiescent));
2104         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2105 
2106         seq_puts(m, "\nModule Parameters:\n");
2107         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2108         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2109         return 0;
2110 }
2111 
2112 /**
2113  * proc_show_stat()
2114  * @m - Synthetic file construction data
2115  * @v - File iterator
2116  *
2117  * Display statistical information about the I/O activity.
2118  */
2119 static int
2120 proc_show_stat(struct seq_file *m, void *v)
2121 {
2122         adapter_t *adapter = m->private;
2123 #if MEGA_HAVE_STATS
2124         int     i;
2125 #endif
2126 
2127         seq_puts(m, "Statistical Information for this controller\n");
2128         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2129 #if MEGA_HAVE_STATS
2130         for(i = 0; i < adapter->numldrv; i++) {
2131                 seq_printf(m, "Logical Drive %d:\n", i);
2132                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2133                            adapter->nreads[i], adapter->nwrites[i]);
2134                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2135                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2136                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2137                            adapter->rd_errors[i], adapter->wr_errors[i]);
2138         }
2139 #else
2140         seq_puts(m, "IO and error counters not compiled in driver.\n");
2141 #endif
2142         return 0;
2143 }
2144 
2145 
2146 /**
2147  * proc_show_mbox()
2148  * @m - Synthetic file construction data
2149  * @v - File iterator
2150  *
2151  * Display mailbox information for the last command issued. This information
2152  * is good for debugging.
2153  */
2154 static int
2155 proc_show_mbox(struct seq_file *m, void *v)
2156 {
2157         adapter_t       *adapter = m->private;
2158         volatile mbox_t *mbox = adapter->mbox;
2159 
2160         seq_puts(m, "Contents of Mail Box Structure\n");
2161         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2162         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2163         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2164         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2165         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2166         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2167         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2168         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2169         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2170         return 0;
2171 }
2172 
2173 
2174 /**
2175  * proc_show_rebuild_rate()
2176  * @m - Synthetic file construction data
2177  * @v - File iterator
2178  *
2179  * Display current rebuild rate
2180  */
2181 static int
2182 proc_show_rebuild_rate(struct seq_file *m, void *v)
2183 {
2184         adapter_t       *adapter = m->private;
2185         dma_addr_t      dma_handle;
2186         caddr_t         inquiry;
2187         struct pci_dev  *pdev;
2188 
2189         if( make_local_pdev(adapter, &pdev) != 0 )
2190                 return 0;
2191 
2192         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2193                 goto free_pdev;
2194 
2195         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2196                 seq_puts(m, "Adapter inquiry failed.\n");
2197                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2198                 goto free_inquiry;
2199         }
2200 
2201         if( adapter->flag & BOARD_40LD )
2202                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2203                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2204         else
2205                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2206                         ((mraid_ext_inquiry *)
2207                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2208 
2209 free_inquiry:
2210         mega_free_inquiry(inquiry, dma_handle, pdev);
2211 free_pdev:
2212         free_local_pdev(pdev);
2213         return 0;
2214 }
2215 
2216 
2217 /**
2218  * proc_show_battery()
2219  * @m - Synthetic file construction data
2220  * @v - File iterator
2221  *
2222  * Display information about the battery module on the controller.
2223  */
2224 static int
2225 proc_show_battery(struct seq_file *m, void *v)
2226 {
2227         adapter_t       *adapter = m->private;
2228         dma_addr_t      dma_handle;
2229         caddr_t         inquiry;
2230         struct pci_dev  *pdev;
2231         u8      battery_status;
2232 
2233         if( make_local_pdev(adapter, &pdev) != 0 )
2234                 return 0;
2235 
2236         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2237                 goto free_pdev;
2238 
2239         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2240                 seq_puts(m, "Adapter inquiry failed.\n");
2241                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2242                 goto free_inquiry;
2243         }
2244 
2245         if( adapter->flag & BOARD_40LD ) {
2246                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2247         }
2248         else {
2249                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2250                         raid_inq.adapter_info.battery_status;
2251         }
2252 
2253         /*
2254          * Decode the battery status
2255          */
2256         seq_printf(m, "Battery Status:[%d]", battery_status);
2257 
2258         if(battery_status == MEGA_BATT_CHARGE_DONE)
2259                 seq_puts(m, " Charge Done");
2260 
2261         if(battery_status & MEGA_BATT_MODULE_MISSING)
2262                 seq_puts(m, " Module Missing");
2263         
2264         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2265                 seq_puts(m, " Low Voltage");
2266         
2267         if(battery_status & MEGA_BATT_TEMP_HIGH)
2268                 seq_puts(m, " Temperature High");
2269         
2270         if(battery_status & MEGA_BATT_PACK_MISSING)
2271                 seq_puts(m, " Pack Missing");
2272         
2273         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2274                 seq_puts(m, " Charge In-progress");
2275         
2276         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2277                 seq_puts(m, " Charge Fail");
2278         
2279         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2280                 seq_puts(m, " Cycles Exceeded");
2281 
2282         seq_putc(m, '\n');
2283 
2284 free_inquiry:
2285         mega_free_inquiry(inquiry, dma_handle, pdev);
2286 free_pdev:
2287         free_local_pdev(pdev);
2288         return 0;
2289 }
2290 
2291 
2292 /*
2293  * Display scsi inquiry
2294  */
2295 static void
2296 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2297 {
2298         int     i;
2299 
2300         seq_puts(m, "  Vendor: ");
2301         seq_write(m, scsi_inq + 8, 8);
2302         seq_puts(m, "  Model: ");
2303         seq_write(m, scsi_inq + 16, 16);
2304         seq_puts(m, "  Rev: ");
2305         seq_write(m, scsi_inq + 32, 4);
2306         seq_putc(m, '\n');
2307 
2308         i = scsi_inq[0] & 0x1f;
2309         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2310 
2311         seq_printf(m, "                 ANSI SCSI revision: %02x",
2312                    scsi_inq[2] & 0x07);
2313 
2314         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2315                 seq_puts(m, " CCS\n");
2316         else
2317                 seq_putc(m, '\n');
2318 }
2319 
2320 /**
2321  * proc_show_pdrv()
2322  * @m - Synthetic file construction data
2323  * @page - buffer to write the data in
2324  * @adapter - pointer to our soft state
2325  *
2326  * Display information about the physical drives.
2327  */
2328 static int
2329 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2330 {
2331         dma_addr_t      dma_handle;
2332         char            *scsi_inq;
2333         dma_addr_t      scsi_inq_dma_handle;
2334         caddr_t         inquiry;
2335         struct pci_dev  *pdev;
2336         u8      *pdrv_state;
2337         u8      state;
2338         int     tgt;
2339         int     max_channels;
2340         int     i;
2341 
2342         if( make_local_pdev(adapter, &pdev) != 0 )
2343                 return 0;
2344 
2345         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2346                 goto free_pdev;
2347 
2348         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2349                 seq_puts(m, "Adapter inquiry failed.\n");
2350                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2351                 goto free_inquiry;
2352         }
2353 
2354 
2355         scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
2356         if( scsi_inq == NULL ) {
2357                 seq_puts(m, "memory not available for scsi inq.\n");
2358                 goto free_inquiry;
2359         }
2360 
2361         if( adapter->flag & BOARD_40LD ) {
2362                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2363         }
2364         else {
2365                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2366                         raid_inq.pdrv_info.pdrv_state;
2367         }
2368 
2369         max_channels = adapter->product_info.nchannels;
2370 
2371         if( channel >= max_channels ) {
2372                 goto free_pci;
2373         }
2374 
2375         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2376 
2377                 i = channel*16 + tgt;
2378 
2379                 state = *(pdrv_state + i);
2380                 switch( state & 0x0F ) {
2381                 case PDRV_ONLINE:
2382                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2383                                    channel, tgt);
2384                         break;
2385 
2386                 case PDRV_FAILED:
2387                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2388                                    channel, tgt);
2389                         break;
2390 
2391                 case PDRV_RBLD:
2392                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2393                                    channel, tgt);
2394                         break;
2395 
2396                 case PDRV_HOTSPARE:
2397                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2398                                    channel, tgt);
2399                         break;
2400 
2401                 default:
2402                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2403                                    channel, tgt);
2404                         break;
2405                 }
2406 
2407                 /*
2408                  * This interface displays inquiries for disk drives
2409                  * only. Inquries for logical drives and non-disk
2410                  * devices are available through /proc/scsi/scsi
2411                  */
2412                 memset(scsi_inq, 0, 256);
2413                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2414                                 scsi_inq_dma_handle) ||
2415                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2416                         continue;
2417                 }
2418 
2419                 /*
2420                  * Check for overflow. We print less than 240
2421                  * characters for inquiry
2422                  */
2423                 seq_puts(m, ".\n");
2424                 mega_print_inquiry(m, scsi_inq);
2425         }
2426 
2427 free_pci:
2428         pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
2429 free_inquiry:
2430         mega_free_inquiry(inquiry, dma_handle, pdev);
2431 free_pdev:
2432         free_local_pdev(pdev);
2433         return 0;
2434 }
2435 
2436 /**
2437  * proc_show_pdrv_ch0()
2438  * @m - Synthetic file construction data
2439  * @v - File iterator
2440  *
2441  * Display information about the physical drives on physical channel 0.
2442  */
2443 static int
2444 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2445 {
2446         return proc_show_pdrv(m, m->private, 0);
2447 }
2448 
2449 
2450 /**
2451  * proc_show_pdrv_ch1()
2452  * @m - Synthetic file construction data
2453  * @v - File iterator
2454  *
2455  * Display information about the physical drives on physical channel 1.
2456  */
2457 static int
2458 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2459 {
2460         return proc_show_pdrv(m, m->private, 1);
2461 }
2462 
2463 
2464 /**
2465  * proc_show_pdrv_ch2()
2466  * @m - Synthetic file construction data
2467  * @v - File iterator
2468  *
2469  * Display information about the physical drives on physical channel 2.
2470  */
2471 static int
2472 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2473 {
2474         return proc_show_pdrv(m, m->private, 2);
2475 }
2476 
2477 
2478 /**
2479  * proc_show_pdrv_ch3()
2480  * @m - Synthetic file construction data
2481  * @v - File iterator
2482  *
2483  * Display information about the physical drives on physical channel 3.
2484  */
2485 static int
2486 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2487 {
2488         return proc_show_pdrv(m, m->private, 3);
2489 }
2490 
2491 
2492 /**
2493  * proc_show_rdrv()
2494  * @m - Synthetic file construction data
2495  * @adapter - pointer to our soft state
2496  * @start - starting logical drive to display
2497  * @end - ending logical drive to display
2498  *
2499  * We do not print the inquiry information since its already available through
2500  * /proc/scsi/scsi interface
2501  */
2502 static int
2503 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2504 {
2505         dma_addr_t      dma_handle;
2506         logdrv_param    *lparam;
2507         megacmd_t       mc;
2508         char            *disk_array;
2509         dma_addr_t      disk_array_dma_handle;
2510         caddr_t         inquiry;
2511         struct pci_dev  *pdev;
2512         u8      *rdrv_state;
2513         int     num_ldrv;
2514         u32     array_sz;
2515         int     i;
2516 
2517         if( make_local_pdev(adapter, &pdev) != 0 )
2518                 return 0;
2519 
2520         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2521                 goto free_pdev;
2522 
2523         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2524                 seq_puts(m, "Adapter inquiry failed.\n");
2525                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2526                 goto free_inquiry;
2527         }
2528 
2529         memset(&mc, 0, sizeof(megacmd_t));
2530 
2531         if( adapter->flag & BOARD_40LD ) {
2532                 array_sz = sizeof(disk_array_40ld);
2533 
2534                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2535 
2536                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2537         }
2538         else {
2539                 array_sz = sizeof(disk_array_8ld);
2540 
2541                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2542                         raid_inq.logdrv_info.ldrv_state;
2543 
2544                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2545                         raid_inq.logdrv_info.num_ldrv;
2546         }
2547 
2548         disk_array = pci_alloc_consistent(pdev, array_sz,
2549                         &disk_array_dma_handle);
2550 
2551         if( disk_array == NULL ) {
2552                 seq_puts(m, "memory not available.\n");
2553                 goto free_inquiry;
2554         }
2555 
2556         mc.xferaddr = (u32)disk_array_dma_handle;
2557 
2558         if( adapter->flag & BOARD_40LD ) {
2559                 mc.cmd = FC_NEW_CONFIG;
2560                 mc.opcode = OP_DCMD_READ_CONFIG;
2561 
2562                 if( mega_internal_command(adapter, &mc, NULL) ) {
2563                         seq_puts(m, "40LD read config failed.\n");
2564                         goto free_pci;
2565                 }
2566 
2567         }
2568         else {
2569                 mc.cmd = NEW_READ_CONFIG_8LD;
2570 
2571                 if( mega_internal_command(adapter, &mc, NULL) ) {
2572                         mc.cmd = READ_CONFIG_8LD;
2573                         if( mega_internal_command(adapter, &mc, NULL) ) {
2574                                 seq_puts(m, "8LD read config failed.\n");
2575                                 goto free_pci;
2576                         }
2577                 }
2578         }
2579 
2580         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2581 
2582                 if( adapter->flag & BOARD_40LD ) {
2583                         lparam =
2584                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2585                 }
2586                 else {
2587                         lparam =
2588                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2589                 }
2590 
2591                 /*
2592                  * Check for overflow. We print less than 240 characters for
2593                  * information about each logical drive.
2594                  */
2595                 seq_printf(m, "Logical drive:%2d:, ", i);
2596 
2597                 switch( rdrv_state[i] & 0x0F ) {
2598                 case RDRV_OFFLINE:
2599                         seq_puts(m, "state: offline");
2600                         break;
2601                 case RDRV_DEGRADED:
2602                         seq_puts(m, "state: degraded");
2603                         break;
2604                 case RDRV_OPTIMAL:
2605                         seq_puts(m, "state: optimal");
2606                         break;
2607                 case RDRV_DELETED:
2608                         seq_puts(m, "state: deleted");
2609                         break;
2610                 default:
2611                         seq_puts(m, "state: unknown");
2612                         break;
2613                 }
2614 
2615                 /*
2616                  * Check if check consistency or initialization is going on
2617                  * for this logical drive.
2618                  */
2619                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2620                         seq_puts(m, ", check-consistency in progress");
2621                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2622                         seq_puts(m, ", initialization in progress");
2623                 
2624                 seq_putc(m, '\n');
2625 
2626                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2627                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2628                 seq_printf(m, "Stripe size:%3d, ",
2629                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2630                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2631 
2632                 seq_puts(m, "Read Policy: ");
2633                 switch(lparam->read_ahead) {
2634                 case NO_READ_AHEAD:
2635                         seq_puts(m, "No read ahead, ");
2636                         break;
2637                 case READ_AHEAD:
2638                         seq_puts(m, "Read ahead, ");
2639                         break;
2640                 case ADAP_READ_AHEAD:
2641                         seq_puts(m, "Adaptive, ");
2642                         break;
2643 
2644                 }
2645 
2646                 seq_puts(m, "Write Policy: ");
2647                 switch(lparam->write_mode) {
2648                 case WRMODE_WRITE_THRU:
2649                         seq_puts(m, "Write thru, ");
2650                         break;
2651                 case WRMODE_WRITE_BACK:
2652                         seq_puts(m, "Write back, ");
2653                         break;
2654                 }
2655 
2656                 seq_puts(m, "Cache Policy: ");
2657                 switch(lparam->direct_io) {
2658                 case CACHED_IO:
2659                         seq_puts(m, "Cached IO\n\n");
2660                         break;
2661                 case DIRECT_IO:
2662                         seq_puts(m, "Direct IO\n\n");
2663                         break;
2664                 }
2665         }
2666 
2667 free_pci:
2668         pci_free_consistent(pdev, array_sz, disk_array,
2669                         disk_array_dma_handle);
2670 free_inquiry:
2671         mega_free_inquiry(inquiry, dma_handle, pdev);
2672 free_pdev:
2673         free_local_pdev(pdev);
2674         return 0;
2675 }
2676 
2677 /**
2678  * proc_show_rdrv_10()
2679  * @m - Synthetic file construction data
2680  * @v - File iterator
2681  *
2682  * Display real time information about the logical drives 0 through 9.
2683  */
2684 static int
2685 proc_show_rdrv_10(struct seq_file *m, void *v)
2686 {
2687         return proc_show_rdrv(m, m->private, 0, 9);
2688 }
2689 
2690 
2691 /**
2692  * proc_show_rdrv_20()
2693  * @m - Synthetic file construction data
2694  * @v - File iterator
2695  *
2696  * Display real time information about the logical drives 0 through 9.
2697  */
2698 static int
2699 proc_show_rdrv_20(struct seq_file *m, void *v)
2700 {
2701         return proc_show_rdrv(m, m->private, 10, 19);
2702 }
2703 
2704 
2705 /**
2706  * proc_show_rdrv_30()
2707  * @m - Synthetic file construction data
2708  * @v - File iterator
2709  *
2710  * Display real time information about the logical drives 0 through 9.
2711  */
2712 static int
2713 proc_show_rdrv_30(struct seq_file *m, void *v)
2714 {
2715         return proc_show_rdrv(m, m->private, 20, 29);
2716 }
2717 
2718 
2719 /**
2720  * proc_show_rdrv_40()
2721  * @m - Synthetic file construction data
2722  * @v - File iterator
2723  *
2724  * Display real time information about the logical drives 0 through 9.
2725  */
2726 static int
2727 proc_show_rdrv_40(struct seq_file *m, void *v)
2728 {
2729         return proc_show_rdrv(m, m->private, 30, 39);
2730 }
2731 
2732 
2733 /*
2734  * seq_file wrappers for procfile show routines.
2735  */
2736 static int mega_proc_open(struct inode *inode, struct file *file)
2737 {
2738         adapter_t *adapter = proc_get_parent_data(inode);
2739         int (*show)(struct seq_file *, void *) = PDE_DATA(inode);
2740 
2741         return single_open(file, show, adapter);
2742 }
2743 
2744 static const struct file_operations mega_proc_fops = {
2745         .open           = mega_proc_open,
2746         .read           = seq_read,
2747         .llseek         = seq_lseek,
2748         .release        = single_release,
2749 };
2750 
2751 /*
2752  * Table of proc files we need to create.
2753  */
2754 struct mega_proc_file {
2755         const char *name;
2756         unsigned short ptr_offset;
2757         int (*show) (struct seq_file *m, void *v);
2758 };
2759 
2760 static const struct mega_proc_file mega_proc_files[] = {
2761         { "config",           offsetof(adapter_t, proc_read), proc_show_config },
2762         { "stat",             offsetof(adapter_t, proc_stat), proc_show_stat },
2763         { "mailbox",          offsetof(adapter_t, proc_mbox), proc_show_mbox },
2764 #if MEGA_HAVE_ENH_PROC
2765         { "rebuild-rate",     offsetof(adapter_t, proc_rr), proc_show_rebuild_rate },
2766         { "battery-status",   offsetof(adapter_t, proc_battery), proc_show_battery },
2767         { "diskdrives-ch0",   offsetof(adapter_t, proc_pdrvstat[0]), proc_show_pdrv_ch0 },
2768         { "diskdrives-ch1",   offsetof(adapter_t, proc_pdrvstat[1]), proc_show_pdrv_ch1 },
2769         { "diskdrives-ch2",   offsetof(adapter_t, proc_pdrvstat[2]), proc_show_pdrv_ch2 },
2770         { "diskdrives-ch3",   offsetof(adapter_t, proc_pdrvstat[3]), proc_show_pdrv_ch3 },
2771         { "raiddrives-0-9",   offsetof(adapter_t, proc_rdrvstat[0]), proc_show_rdrv_10 },
2772         { "raiddrives-10-19", offsetof(adapter_t, proc_rdrvstat[1]), proc_show_rdrv_20 },
2773         { "raiddrives-20-29", offsetof(adapter_t, proc_rdrvstat[2]), proc_show_rdrv_30 },
2774         { "raiddrives-30-39", offsetof(adapter_t, proc_rdrvstat[3]), proc_show_rdrv_40 },
2775 #endif
2776         { NULL }
2777 };
2778 
2779 /**
2780  * mega_create_proc_entry()
2781  * @index - index in soft state array
2782  * @parent - parent node for this /proc entry
2783  *
2784  * Creates /proc entries for our controllers.
2785  */
2786 static void
2787 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2788 {
2789         const struct mega_proc_file *f;
2790         adapter_t       *adapter = hba_soft_state[index];
2791         struct proc_dir_entry   *dir, *de, **ppde;
2792         u8              string[16];
2793 
2794         sprintf(string, "hba%d", adapter->host->host_no);
2795 
2796         dir = adapter->controller_proc_dir_entry =
2797                 proc_mkdir_data(string, 0, parent, adapter);
2798         if(!dir) {
2799                 dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
2800                 return;
2801         }
2802 
2803         for (f = mega_proc_files; f->name; f++) {
2804                 de = proc_create_data(f->name, S_IRUSR, dir, &mega_proc_fops,
2805                                       f->show);
2806                 if (!de) {
2807                         dev_warn(&adapter->dev->dev, "proc_create failed\n");
2808                         return;
2809                 }
2810 
2811                 ppde = (void *)adapter + f->ptr_offset;
2812                 *ppde = de;
2813         }
2814 }
2815 
2816 #else
2817 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2818 {
2819 }
2820 #endif
2821 
2822 
2823 /**
2824  * megaraid_biosparam()
2825  *
2826  * Return the disk geometry for a particular disk
2827  */
2828 static int
2829 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2830                     sector_t capacity, int geom[])
2831 {
2832         adapter_t       *adapter;
2833         unsigned char   *bh;
2834         int     heads;
2835         int     sectors;
2836         int     cylinders;
2837         int     rval;
2838 
2839         /* Get pointer to host config structure */
2840         adapter = (adapter_t *)sdev->host->hostdata;
2841 
2842         if (IS_RAID_CH(adapter, sdev->channel)) {
2843                         /* Default heads (64) & sectors (32) */
2844                         heads = 64;
2845                         sectors = 32;
2846                         cylinders = (ulong)capacity / (heads * sectors);
2847 
2848                         /*
2849                          * Handle extended translation size for logical drives
2850                          * > 1Gb
2851                          */
2852                         if ((ulong)capacity >= 0x200000) {
2853                                 heads = 255;
2854                                 sectors = 63;
2855                                 cylinders = (ulong)capacity / (heads * sectors);
2856                         }
2857 
2858                         /* return result */
2859                         geom[0] = heads;
2860                         geom[1] = sectors;
2861                         geom[2] = cylinders;
2862         }
2863         else {
2864                 bh = scsi_bios_ptable(bdev);
2865 
2866                 if( bh ) {
2867                         rval = scsi_partsize(bh, capacity,
2868                                             &geom[2], &geom[0], &geom[1]);
2869                         kfree(bh);
2870                         if( rval != -1 )
2871                                 return rval;
2872                 }
2873 
2874                 dev_info(&adapter->dev->dev,
2875                          "invalid partition on this disk on channel %d\n",
2876                          sdev->channel);
2877 
2878                 /* Default heads (64) & sectors (32) */
2879                 heads = 64;
2880                 sectors = 32;
2881                 cylinders = (ulong)capacity / (heads * sectors);
2882 
2883                 /* Handle extended translation size for logical drives > 1Gb */
2884                 if ((ulong)capacity >= 0x200000) {
2885                         heads = 255;
2886                         sectors = 63;
2887                         cylinders = (ulong)capacity / (heads * sectors);
2888                 }
2889 
2890                 /* return result */
2891                 geom[0] = heads;
2892                 geom[1] = sectors;
2893                 geom[2] = cylinders;
2894         }
2895 
2896         return 0;
2897 }
2898 
2899 /**
2900  * mega_init_scb()
2901  * @adapter - pointer to our soft state
2902  *
2903  * Allocate memory for the various pointers in the scb structures:
2904  * scatter-gather list pointer, passthru and extended passthru structure
2905  * pointers.
2906  */
2907 static int
2908 mega_init_scb(adapter_t *adapter)
2909 {
2910         scb_t   *scb;
2911         int     i;
2912 
2913         for( i = 0; i < adapter->max_cmds; i++ ) {
2914 
2915                 scb = &adapter->scb_list[i];
2916 
2917                 scb->sgl64 = NULL;
2918                 scb->sgl = NULL;
2919                 scb->pthru = NULL;
2920                 scb->epthru = NULL;
2921         }
2922 
2923         for( i = 0; i < adapter->max_cmds; i++ ) {
2924 
2925                 scb = &adapter->scb_list[i];
2926 
2927                 scb->idx = i;
2928 
2929                 scb->sgl64 = pci_alloc_consistent(adapter->dev,
2930                                 sizeof(mega_sgl64) * adapter->sglen,
2931                                 &scb->sgl_dma_addr);
2932 
2933                 scb->sgl = (mega_sglist *)scb->sgl64;
2934 
2935                 if( !scb->sgl ) {
2936                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
2937                         mega_free_sgl(adapter);
2938                         return -1;
2939                 }
2940 
2941                 scb->pthru = pci_alloc_consistent(adapter->dev,
2942                                 sizeof(mega_passthru),
2943                                 &scb->pthru_dma_addr);
2944 
2945                 if( !scb->pthru ) {
2946                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
2947                         mega_free_sgl(adapter);
2948                         return -1;
2949                 }
2950 
2951                 scb->epthru = pci_alloc_consistent(adapter->dev,
2952                                 sizeof(mega_ext_passthru),
2953                                 &scb->epthru_dma_addr);
2954 
2955                 if( !scb->epthru ) {
2956                         dev_warn(&adapter->dev->dev,
2957                                 "Can't allocate extended passthru\n");
2958                         mega_free_sgl(adapter);
2959                         return -1;
2960                 }
2961 
2962 
2963                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2964 
2965                 /*
2966                  * Link to free list
2967                  * lock not required since we are loading the driver, so no
2968                  * commands possible right now.
2969                  */
2970                 scb->state = SCB_FREE;
2971                 scb->cmd = NULL;
2972                 list_add(&scb->list, &adapter->free_list);
2973         }
2974 
2975         return 0;
2976 }
2977 
2978 
2979 /**
2980  * megadev_open()
2981  * @inode - unused
2982  * @filep - unused
2983  *
2984  * Routines for the character/ioctl interface to the driver. Find out if this
2985  * is a valid open. 
2986  */
2987 static int
2988 megadev_open (struct inode *inode, struct file *filep)
2989 {
2990         /*
2991          * Only allow superuser to access private ioctl interface
2992          */
2993         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2994 
2995         return 0;
2996 }
2997 
2998 
2999 /**
3000  * megadev_ioctl()
3001  * @inode - Our device inode
3002  * @filep - unused
3003  * @cmd - ioctl command
3004  * @arg - user buffer
3005  *
3006  * ioctl entry point for our private ioctl interface. We move the data in from
3007  * the user space, prepare the command (if necessary, convert the old MIMD
3008  * ioctl to new ioctl command), and issue a synchronous command to the
3009  * controller.
3010  */
3011 static int
3012 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3013 {
3014         adapter_t       *adapter;
3015         nitioctl_t      uioc;
3016         int             adapno;
3017         int             rval;
3018         mega_passthru   __user *upthru; /* user address for passthru */
3019         mega_passthru   *pthru;         /* copy user passthru here */
3020         dma_addr_t      pthru_dma_hndl;
3021         void            *data = NULL;   /* data to be transferred */
3022         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
3023         megacmd_t       mc;
3024         megastat_t      __user *ustats;
3025         int             num_ldrv;
3026         u32             uxferaddr = 0;
3027         struct pci_dev  *pdev;
3028 
3029         ustats = NULL; /* avoid compilation warnings */
3030         num_ldrv = 0;
3031 
3032         /*
3033          * Make sure only USCSICMD are issued through this interface.
3034          * MIMD application would still fire different command.
3035          */
3036         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
3037                 return -EINVAL;
3038         }
3039 
3040         /*
3041          * Check and convert a possible MIMD command to NIT command.
3042          * mega_m_to_n() copies the data from the user space, so we do not
3043          * have to do it here.
3044          * NOTE: We will need some user address to copyout the data, therefore
3045          * the inteface layer will also provide us with the required user
3046          * addresses.
3047          */
3048         memset(&uioc, 0, sizeof(nitioctl_t));
3049         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3050                 return rval;
3051 
3052 
3053         switch( uioc.opcode ) {
3054 
3055         case GET_DRIVER_VER:
3056                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3057                         return (-EFAULT);
3058 
3059                 break;
3060 
3061         case GET_N_ADAP:
3062                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3063                         return (-EFAULT);
3064 
3065                 /*
3066                  * Shucks. MIMD interface returns a positive value for number
3067                  * of adapters. TODO: Change it to return 0 when there is no
3068                  * applicatio using mimd interface.
3069                  */
3070                 return hba_count;
3071 
3072         case GET_ADAP_INFO:
3073 
3074                 /*
3075                  * Which adapter
3076                  */
3077                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3078                         return (-ENODEV);
3079 
3080                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3081                                 sizeof(struct mcontroller)) )
3082                         return (-EFAULT);
3083                 break;
3084 
3085 #if MEGA_HAVE_STATS
3086 
3087         case GET_STATS:
3088                 /*
3089                  * Which adapter
3090                  */
3091                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3092                         return (-ENODEV);
3093 
3094                 adapter = hba_soft_state[adapno];
3095 
3096                 ustats = uioc.uioc_uaddr;
3097 
3098                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3099                         return (-EFAULT);
3100 
3101                 /*
3102                  * Check for the validity of the logical drive number
3103                  */
3104                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3105 
3106                 if( copy_to_user(ustats->nreads, adapter->nreads,
3107                                         num_ldrv*sizeof(u32)) )
3108                         return -EFAULT;
3109 
3110                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3111                                         num_ldrv*sizeof(u32)) )
3112                         return -EFAULT;
3113 
3114                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3115                                         num_ldrv*sizeof(u32)) )
3116                         return -EFAULT;
3117 
3118                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3119                                         num_ldrv*sizeof(u32)) )
3120                         return -EFAULT;
3121 
3122                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3123                                         num_ldrv*sizeof(u32)) )
3124                         return -EFAULT;
3125 
3126                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3127                                         num_ldrv*sizeof(u32)) )
3128                         return -EFAULT;
3129 
3130                 return 0;
3131 
3132 #endif
3133         case MBOX_CMD:
3134 
3135                 /*
3136                  * Which adapter
3137                  */
3138                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3139                         return (-ENODEV);
3140 
3141                 adapter = hba_soft_state[adapno];
3142 
3143                 /*
3144                  * Deletion of logical drive is a special case. The adapter
3145                  * should be quiescent before this command is issued.
3146                  */
3147                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3148                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3149 
3150                         /*
3151                          * Do we support this feature
3152                          */
3153                         if( !adapter->support_random_del ) {
3154                                 dev_warn(&adapter->dev->dev, "logdrv "
3155                                         "delete on non-supporting F/W\n");
3156 
3157                                 return (-EINVAL);
3158                         }
3159 
3160                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3161 
3162                         if( rval == 0 ) {
3163                                 memset(&mc, 0, sizeof(megacmd_t));
3164 
3165                                 mc.status = rval;
3166 
3167                                 rval = mega_n_to_m((void __user *)arg, &mc);
3168                         }
3169 
3170                         return rval;
3171                 }
3172                 /*
3173                  * This interface only support the regular passthru commands.
3174                  * Reject extended passthru and 64-bit passthru
3175                  */
3176                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3177                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3178 
3179                         dev_warn(&adapter->dev->dev, "rejected passthru\n");
3180 
3181                         return (-EINVAL);
3182                 }
3183 
3184                 /*
3185                  * For all internal commands, the buffer must be allocated in
3186                  * <4GB address range
3187                  */
3188                 if( make_local_pdev(adapter, &pdev) != 0 )
3189                         return -EIO;
3190 
3191                 /* Is it a passthru command or a DCMD */
3192                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3193                         /* Passthru commands */
3194 
3195                         pthru = pci_alloc_consistent(pdev,
3196                                         sizeof(mega_passthru),
3197                                         &pthru_dma_hndl);
3198 
3199                         if( pthru == NULL ) {
3200                                 free_local_pdev(pdev);
3201                                 return (-ENOMEM);
3202                         }
3203 
3204                         /*
3205                          * The user passthru structure
3206                          */
3207                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3208 
3209                         /*
3210                          * Copy in the user passthru here.
3211                          */
3212                         if( copy_from_user(pthru, upthru,
3213                                                 sizeof(mega_passthru)) ) {
3214 
3215                                 pci_free_consistent(pdev,
3216                                                 sizeof(mega_passthru), pthru,
3217                                                 pthru_dma_hndl);
3218 
3219                                 free_local_pdev(pdev);
3220 
3221                                 return (-EFAULT);
3222                         }
3223 
3224                         /*
3225                          * Is there a data transfer
3226                          */
3227                         if( pthru->dataxferlen ) {
3228                                 data = pci_alloc_consistent(pdev,
3229                                                 pthru->dataxferlen,
3230                                                 &data_dma_hndl);
3231 
3232                                 if( data == NULL ) {
3233                                         pci_free_consistent(pdev,
3234                                                         sizeof(mega_passthru),
3235                                                         pthru,
3236                                                         pthru_dma_hndl);
3237 
3238                                         free_local_pdev(pdev);
3239 
3240                                         return (-ENOMEM);
3241                                 }
3242 
3243                                 /*
3244                                  * Save the user address and point the kernel
3245                                  * address at just allocated memory
3246                                  */
3247                                 uxferaddr = pthru->dataxferaddr;
3248                                 pthru->dataxferaddr = data_dma_hndl;
3249                         }
3250 
3251 
3252                         /*
3253                          * Is data coming down-stream
3254                          */
3255                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3256                                 /*
3257                                  * Get the user data
3258                                  */
3259                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3260                                                         pthru->dataxferlen) ) {
3261                                         rval = (-EFAULT);
3262                                         goto freemem_and_return;
3263                                 }
3264                         }
3265 
3266                         memset(&mc, 0, sizeof(megacmd_t));
3267 
3268                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3269                         mc.xferaddr = (u32)pthru_dma_hndl;
3270 
3271                         /*
3272                          * Issue the command
3273                          */
3274                         mega_internal_command(adapter, &mc, pthru);
3275 
3276                         rval = mega_n_to_m((void __user *)arg, &mc);
3277 
3278                         if( rval ) goto freemem_and_return;
3279 
3280 
3281                         /*
3282                          * Is data going up-stream
3283                          */
3284                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3285                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3286                                                         pthru->dataxferlen) ) {
3287                                         rval = (-EFAULT);
3288                                 }
3289                         }
3290 
3291                         /*
3292                          * Send the request sense data also, irrespective of
3293                          * whether the user has asked for it or not.
3294                          */
3295                         if (copy_to_user(upthru->reqsensearea,
3296                                         pthru->reqsensearea, 14))
3297                                 rval = -EFAULT;
3298 
3299 freemem_and_return:
3300                         if( pthru->dataxferlen ) {
3301                                 pci_free_consistent(pdev,
3302                                                 pthru->dataxferlen, data,
3303                                                 data_dma_hndl);
3304                         }
3305 
3306                         pci_free_consistent(pdev, sizeof(mega_passthru),
3307                                         pthru, pthru_dma_hndl);
3308 
3309                         free_local_pdev(pdev);
3310 
3311                         return rval;
3312                 }
3313                 else {
3314                         /* DCMD commands */
3315 
3316                         /*
3317                          * Is there a data transfer
3318                          */
3319                         if( uioc.xferlen ) {
3320                                 data = pci_alloc_consistent(pdev,
3321                                                 uioc.xferlen, &data_dma_hndl);
3322 
3323                                 if( data == NULL ) {
3324                                         free_local_pdev(pdev);
3325                                         return (-ENOMEM);
3326                                 }
3327 
3328                                 uxferaddr = MBOX(uioc)->xferaddr;
3329                         }
3330 
3331                         /*
3332                          * Is data coming down-stream
3333                          */
3334                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3335                                 /*
3336                                  * Get the user data
3337                                  */
3338                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3339                                                         uioc.xferlen) ) {
3340 
3341                                         pci_free_consistent(pdev,
3342                                                         uioc.xferlen,
3343                                                         data, data_dma_hndl);
3344 
3345                                         free_local_pdev(pdev);
3346 
3347                                         return (-EFAULT);
3348                                 }
3349                         }
3350 
3351                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3352 
3353                         mc.xferaddr = (u32)data_dma_hndl;
3354 
3355                         /*
3356                          * Issue the command
3357                          */
3358                         mega_internal_command(adapter, &mc, NULL);
3359 
3360                         rval = mega_n_to_m((void __user *)arg, &mc);
3361 
3362                         if( rval ) {
3363                                 if( uioc.xferlen ) {
3364                                         pci_free_consistent(pdev,
3365                                                         uioc.xferlen, data,
3366                                                         data_dma_hndl);
3367                                 }
3368 
3369                                 free_local_pdev(pdev);
3370 
3371                                 return rval;
3372                         }
3373 
3374                         /*
3375                          * Is data going up-stream
3376                          */
3377                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3378                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3379                                                         uioc.xferlen) ) {
3380 
3381                                         rval = (-EFAULT);
3382                                 }
3383                         }
3384 
3385                         if( uioc.xferlen ) {
3386                                 pci_free_consistent(pdev,
3387                                                 uioc.xferlen, data,
3388                                                 data_dma_hndl);
3389                         }
3390 
3391                         free_local_pdev(pdev);
3392 
3393                         return rval;
3394                 }
3395 
3396         default:
3397                 return (-EINVAL);
3398         }
3399 
3400         return 0;
3401 }
3402 
3403 static long
3404 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3405 {
3406         int ret;
3407 
3408         mutex_lock(&megadev_mutex);
3409         ret = megadev_ioctl(filep, cmd, arg);
3410         mutex_unlock(&megadev_mutex);
3411 
3412         return ret;
3413 }
3414 
3415 /**
3416  * mega_m_to_n()
3417  * @arg - user address
3418  * @uioc - new ioctl structure
3419  *
3420  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3421  * structure
3422  *
3423  * Converts the older mimd ioctl structure to newer NIT structure
3424  */
3425 static int
3426 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3427 {
3428         struct uioctl_t uioc_mimd;
3429         char    signature[8] = {0};
3430         u8      opcode;
3431         u8      subopcode;
3432 
3433 
3434         /*
3435          * check is the application conforms to NIT. We do not have to do much
3436          * in that case.
3437          * We exploit the fact that the signature is stored in the very
3438          * beginning of the structure.
3439          */
3440 
3441         if( copy_from_user(signature, arg, 7) )
3442                 return (-EFAULT);
3443 
3444         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3445 
3446                 /*
3447                  * NOTE NOTE: The nit ioctl is still under flux because of
3448                  * change of mailbox definition, in HPE. No applications yet
3449                  * use this interface and let's not have applications use this
3450                  * interface till the new specifitions are in place.
3451                  */
3452                 return -EINVAL;
3453 #if 0
3454                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3455                         return (-EFAULT);
3456                 return 0;
3457 #endif
3458         }
3459 
3460         /*
3461          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3462          *
3463          * Get the user ioctl structure
3464          */
3465         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3466                 return (-EFAULT);
3467 
3468 
3469         /*
3470          * Get the opcode and subopcode for the commands
3471          */
3472         opcode = uioc_mimd.ui.fcs.opcode;
3473         subopcode = uioc_mimd.ui.fcs.subopcode;
3474 
3475         switch (opcode) {
3476         case 0x82:
3477 
3478                 switch (subopcode) {
3479 
3480                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3481                         uioc->opcode = GET_DRIVER_VER;
3482                         uioc->uioc_uaddr = uioc_mimd.data;
3483                         break;
3484 
3485                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3486                         uioc->opcode = GET_N_ADAP;
3487                         uioc->uioc_uaddr = uioc_mimd.data;
3488                         break;
3489 
3490                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3491                         uioc->opcode = GET_ADAP_INFO;
3492                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3493                         uioc->uioc_uaddr = uioc_mimd.data;
3494                         break;
3495 
3496                 default:
3497                         return(-EINVAL);
3498                 }
3499 
3500                 break;
3501 
3502 
3503         case 0x81:
3504 
3505                 uioc->opcode = MBOX_CMD;
3506                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3507 
3508                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3509 
3510                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3511 
3512                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3513                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3514 
3515                 break;
3516 
3517         case 0x80:
3518 
3519                 uioc->opcode = MBOX_CMD;
3520                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3521 
3522                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3523 
3524                 /*
3525                  * Choose the xferlen bigger of input and output data
3526                  */
3527                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3528                         uioc_mimd.outlen : uioc_mimd.inlen;
3529 
3530                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3531                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3532 
3533                 break;
3534 
3535         default:
3536                 return (-EINVAL);
3537 
3538         }
3539 
3540         return 0;
3541 }
3542 
3543 /*
3544  * mega_n_to_m()
3545  * @arg - user address
3546  * @mc - mailbox command
3547  *
3548  * Updates the status information to the application, depending on application
3549  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3550  */
3551 static int
3552 mega_n_to_m(void __user *arg, megacmd_t *mc)
3553 {
3554         nitioctl_t      __user *uiocp;
3555         megacmd_t       __user *umc;
3556         mega_passthru   __user *upthru;
3557         struct uioctl_t __user *uioc_mimd;
3558         char    signature[8] = {0};
3559 
3560         /*
3561          * check is the application conforms to NIT.
3562          */
3563         if( copy_from_user(signature, arg, 7) )
3564                 return -EFAULT;
3565 
3566         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3567 
3568                 uiocp = arg;
3569 
3570                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3571                         return (-EFAULT);
3572 
3573                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3574 
3575                         umc = MBOX_P(uiocp);
3576 
3577                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3578                                 return -EFAULT;
3579 
3580                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3581                                 return (-EFAULT);
3582                 }
3583         }
3584         else {
3585                 uioc_mimd = arg;
3586 
3587                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3588                         return (-EFAULT);
3589 
3590                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3591 
3592                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3593 
3594                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3595                                 return (-EFAULT);
3596 
3597                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3598                                 return (-EFAULT);
3599                 }
3600         }
3601 
3602         return 0;
3603 }
3604 
3605 
3606 /*
3607  * MEGARAID 'FW' commands.
3608  */
3609 
3610 /**
3611  * mega_is_bios_enabled()
3612  * @adapter - pointer to our soft state
3613  *
3614  * issue command to find out if the BIOS is enabled for this controller
3615  */
3616 static int
3617 mega_is_bios_enabled(adapter_t *adapter)
3618 {
3619         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3620         mbox_t  *mbox;
3621         int     ret;
3622 
3623         mbox = (mbox_t *)raw_mbox;
3624 
3625         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3626 
3627         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3628 
3629         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3630 
3631         raw_mbox[0] = IS_BIOS_ENABLED;
3632         raw_mbox[2] = GET_BIOS;
3633 
3634 
3635         ret = issue_scb_block(adapter, raw_mbox);
3636 
3637         return *(char *)adapter->mega_buffer;
3638 }
3639 
3640 
3641 /**
3642  * mega_enum_raid_scsi()
3643  * @adapter - pointer to our soft state
3644  *
3645  * Find out what channels are RAID/SCSI. This information is used to
3646  * differentiate the virtual channels and physical channels and to support
3647  * ROMB feature and non-disk devices.
3648  */
3649 static void
3650 mega_enum_raid_scsi(adapter_t *adapter)
3651 {
3652         unsigned char raw_mbox[sizeof(struct mbox_out)];
3653         mbox_t *mbox;
3654         int i;
3655 
3656         mbox = (mbox_t *)raw_mbox;
3657 
3658         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3659 
3660         /*
3661          * issue command to find out what channels are raid/scsi
3662          */
3663         raw_mbox[0] = CHNL_CLASS;
3664         raw_mbox[2] = GET_CHNL_CLASS;
3665 
3666         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3667 
3668         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3669 
3670         /*
3671          * Non-ROMB firmware fail this command, so all channels
3672          * must be shown RAID
3673          */
3674         adapter->mega_ch_class = 0xFF;
3675 
3676         if(!issue_scb_block(adapter, raw_mbox)) {
3677                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3678 
3679         }
3680 
3681         for( i = 0; i < adapter->product_info.nchannels; i++ ) { 
3682                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3683                         dev_info(&adapter->dev->dev, "channel[%d] is raid\n",
3684                                         i);
3685                 }
3686                 else {
3687                         dev_info(&adapter->dev->dev, "channel[%d] is scsi\n",
3688                                         i);
3689                 }
3690         }
3691 
3692         return;
3693 }
3694 
3695 
3696 /**
3697  * mega_get_boot_drv()
3698  * @adapter - pointer to our soft state
3699  *
3700  * Find out which device is the boot device. Note, any logical drive or any
3701  * phyical device (e.g., a CDROM) can be designated as a boot device.
3702  */
3703 static void
3704 mega_get_boot_drv(adapter_t *adapter)
3705 {
3706         struct private_bios_data        *prv_bios_data;
3707         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3708         mbox_t  *mbox;
3709         u16     cksum = 0;
3710         u8      *cksum_p;
3711         u8      boot_pdrv;
3712         int     i;
3713 
3714         mbox = (mbox_t *)raw_mbox;
3715 
3716         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3717 
3718         raw_mbox[0] = BIOS_PVT_DATA;
3719         raw_mbox[2] = GET_BIOS_PVT_DATA;
3720 
3721         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3722 
3723         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3724 
3725         adapter->boot_ldrv_enabled = 0;
3726         adapter->boot_ldrv = 0;
3727 
3728         adapter->boot_pdrv_enabled = 0;
3729         adapter->boot_pdrv_ch = 0;
3730         adapter->boot_pdrv_tgt = 0;
3731 
3732         if(issue_scb_block(adapter, raw_mbox) == 0) {
3733                 prv_bios_data =
3734                         (struct private_bios_data *)adapter->mega_buffer;
3735 
3736                 cksum = 0;
3737                 cksum_p = (char *)prv_bios_data;
3738                 for (i = 0; i < 14; i++ ) {
3739                         cksum += (u16)(*cksum_p++);
3740                 }
3741 
3742                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3743 
3744                         /*
3745                          * If MSB is set, a physical drive is set as boot
3746                          * device
3747                          */
3748                         if( prv_bios_data->boot_drv & 0x80 ) {
3749                                 adapter->boot_pdrv_enabled = 1;
3750                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3751                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3752                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3753                         }
3754                         else {
3755                                 adapter->boot_ldrv_enabled = 1;
3756                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3757                         }
3758                 }
3759         }
3760 
3761 }
3762 
3763 /**
3764  * mega_support_random_del()
3765  * @adapter - pointer to our soft state
3766  *
3767  * Find out if this controller supports random deletion and addition of
3768  * logical drives
3769  */
3770 static int
3771 mega_support_random_del(adapter_t *adapter)
3772 {
3773         unsigned char raw_mbox[sizeof(struct mbox_out)];
3774         mbox_t *mbox;
3775         int rval;
3776 
3777         mbox = (mbox_t *)raw_mbox;
3778 
3779         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3780 
3781         /*
3782          * issue command
3783          */
3784         raw_mbox[0] = FC_DEL_LOGDRV;
3785         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3786 
3787         rval = issue_scb_block(adapter, raw_mbox);
3788 
3789         return !rval;
3790 }
3791 
3792 
3793 /**
3794  * mega_support_ext_cdb()
3795  * @adapter - pointer to our soft state
3796  *
3797  * Find out if this firmware support cdblen > 10
3798  */
3799 static int
3800 mega_support_ext_cdb(adapter_t *adapter)
3801 {
3802         unsigned char raw_mbox[sizeof(struct mbox_out)];
3803         mbox_t *mbox;
3804         int rval;
3805 
3806         mbox = (mbox_t *)raw_mbox;
3807 
3808         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3809         /*
3810          * issue command to find out if controller supports extended CDBs.
3811          */
3812         raw_mbox[0] = 0xA4;
3813         raw_mbox[2] = 0x16;
3814 
3815         rval = issue_scb_block(adapter, raw_mbox);
3816 
3817         return !rval;
3818 }
3819 
3820 
3821 /**
3822  * mega_del_logdrv()
3823  * @adapter - pointer to our soft state
3824  * @logdrv - logical drive to be deleted
3825  *
3826  * Delete the specified logical drive. It is the responsibility of the user
3827  * app to let the OS know about this operation.
3828  */
3829 static int
3830 mega_del_logdrv(adapter_t *adapter, int logdrv)
3831 {
3832         unsigned long flags;
3833         scb_t *scb;
3834         int rval;
3835 
3836         /*
3837          * Stop sending commands to the controller, queue them internally.
3838          * When deletion is complete, ISR will flush the queue.
3839          */
3840         atomic_set(&adapter->quiescent, 1);
3841 
3842         /*
3843          * Wait till all the issued commands are complete and there are no
3844          * commands in the pending queue
3845          */
3846         while (atomic_read(&adapter->pend_cmds) > 0 ||
3847                !list_empty(&adapter->pending_list))
3848                 msleep(1000);   /* sleep for 1s */
3849 
3850         rval = mega_do_del_logdrv(adapter, logdrv);
3851 
3852         spin_lock_irqsave(&adapter->lock, flags);
3853 
3854         /*
3855          * If delete operation was successful, add 0x80 to the logical drive
3856          * ids for commands in the pending queue.
3857          */
3858         if (adapter->read_ldidmap) {
3859                 struct list_head *pos;
3860                 list_for_each(pos, &adapter->pending_list) {
3861                         scb = list_entry(pos, scb_t, list);
3862                         if (scb->pthru->logdrv < 0x80 )
3863                                 scb->pthru->logdrv += 0x80;
3864                 }
3865         }
3866 
3867         atomic_set(&adapter->quiescent, 0);
3868 
3869         mega_runpendq(adapter);
3870 
3871         spin_unlock_irqrestore(&adapter->lock, flags);
3872 
3873         return rval;
3874 }
3875 
3876 
3877 static int
3878 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3879 {
3880         megacmd_t       mc;
3881         int     rval;
3882 
3883         memset( &mc, 0, sizeof(megacmd_t));
3884 
3885         mc.cmd = FC_DEL_LOGDRV;
3886         mc.opcode = OP_DEL_LOGDRV;
3887         mc.subopcode = logdrv;
3888 
3889         rval = mega_internal_command(adapter, &mc, NULL);
3890 
3891         /* log this event */
3892         if(rval) {
3893                 dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv);
3894                 return rval;
3895         }
3896 
3897         /*
3898          * After deleting first logical drive, the logical drives must be
3899          * addressed by adding 0x80 to the logical drive id.
3900          */
3901         adapter->read_ldidmap = 1;
3902 
3903         return rval;
3904 }
3905 
3906 
3907 /**
3908  * mega_get_max_sgl()
3909  * @adapter - pointer to our soft state
3910  *
3911  * Find out the maximum number of scatter-gather elements supported by this
3912  * version of the firmware
3913  */
3914 static void
3915 mega_get_max_sgl(adapter_t *adapter)
3916 {
3917         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3918         mbox_t  *mbox;
3919 
3920         mbox = (mbox_t *)raw_mbox;
3921 
3922         memset(mbox, 0, sizeof(raw_mbox));
3923 
3924         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3925 
3926         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3927 
3928         raw_mbox[0] = MAIN_MISC_OPCODE;
3929         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3930 
3931 
3932         if( issue_scb_block(adapter, raw_mbox) ) {
3933                 /*
3934                  * f/w does not support this command. Choose the default value
3935                  */
3936                 adapter->sglen = MIN_SGLIST;
3937         }
3938         else {
3939                 adapter->sglen = *((char *)adapter->mega_buffer);
3940                 
3941                 /*
3942                  * Make sure this is not more than the resources we are
3943                  * planning to allocate
3944                  */
3945                 if ( adapter->sglen > MAX_SGLIST )
3946                         adapter->sglen = MAX_SGLIST;
3947         }
3948 
3949         return;
3950 }
3951 
3952 
3953 /**
3954  * mega_support_cluster()
3955  * @adapter - pointer to our soft state
3956  *
3957  * Find out if this firmware support cluster calls.
3958  */
3959 static int
3960 mega_support_cluster(adapter_t *adapter)
3961 {
3962         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3963         mbox_t  *mbox;
3964 
3965         mbox = (mbox_t *)raw_mbox;
3966 
3967         memset(mbox, 0, sizeof(raw_mbox));
3968 
3969         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3970 
3971         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3972 
3973         /*
3974          * Try to get the initiator id. This command will succeed iff the
3975          * clustering is available on this HBA.
3976          */
3977         raw_mbox[0] = MEGA_GET_TARGET_ID;
3978 
3979         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3980 
3981                 /*
3982                  * Cluster support available. Get the initiator target id.
3983                  * Tell our id to mid-layer too.
3984                  */
3985                 adapter->this_id = *(u32 *)adapter->mega_buffer;
3986                 adapter->host->this_id = adapter->this_id;
3987 
3988                 return 1;
3989         }
3990 
3991         return 0;
3992 }
3993 
3994 #ifdef CONFIG_PROC_FS
3995 /**
3996  * mega_adapinq()
3997  * @adapter - pointer to our soft state
3998  * @dma_handle - DMA address of the buffer
3999  *
4000  * Issue internal commands while interrupts are available.
4001  * We only issue direct mailbox commands from within the driver. ioctl()
4002  * interface using these routines can issue passthru commands.
4003  */
4004 static int
4005 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
4006 {
4007         megacmd_t       mc;
4008 
4009         memset(&mc, 0, sizeof(megacmd_t));
4010 
4011         if( adapter->flag & BOARD_40LD ) {
4012                 mc.cmd = FC_NEW_CONFIG;
4013                 mc.opcode = NC_SUBOP_ENQUIRY3;
4014                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
4015         }
4016         else {
4017                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
4018         }
4019 
4020         mc.xferaddr = (u32)dma_handle;
4021 
4022         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
4023                 return -1;
4024         }
4025 
4026         return 0;
4027 }
4028 
4029 
4030 /** mega_internal_dev_inquiry()
4031  * @adapter - pointer to our soft state
4032  * @ch - channel for this device
4033  * @tgt - ID of this device
4034  * @buf_dma_handle - DMA address of the buffer
4035  *
4036  * Issue the scsi inquiry for the specified device.
4037  */
4038 static int
4039 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4040                 dma_addr_t buf_dma_handle)
4041 {
4042         mega_passthru   *pthru;
4043         dma_addr_t      pthru_dma_handle;
4044         megacmd_t       mc;
4045         int             rval;
4046         struct pci_dev  *pdev;
4047 
4048 
4049         /*
4050          * For all internal commands, the buffer must be allocated in <4GB
4051          * address range
4052          */
4053         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4054 
4055         pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
4056                         &pthru_dma_handle);
4057 
4058         if( pthru == NULL ) {
4059                 free_local_pdev(pdev);
4060                 return -1;
4061         }
4062 
4063         pthru->timeout = 2;
4064         pthru->ars = 1;
4065         pthru->reqsenselen = 14;
4066         pthru->islogical = 0;
4067 
4068         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4069 
4070         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4071 
4072         pthru->cdblen = 6;
4073 
4074         pthru->cdb[0] = INQUIRY;
4075         pthru->cdb[1] = 0;
4076         pthru->cdb[2] = 0;
4077         pthru->cdb[3] = 0;
4078         pthru->cdb[4] = 255;
4079         pthru->cdb[5] = 0;
4080 
4081 
4082         pthru->dataxferaddr = (u32)buf_dma_handle;
4083         pthru->dataxferlen = 256;
4084 
4085         memset(&mc, 0, sizeof(megacmd_t));
4086 
4087         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4088         mc.xferaddr = (u32)pthru_dma_handle;
4089 
4090         rval = mega_internal_command(adapter, &mc, pthru);
4091 
4092         pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
4093                         pthru_dma_handle);
4094 
4095         free_local_pdev(pdev);
4096 
4097         return rval;
4098 }
4099 #endif
4100 
4101 /**
4102  * mega_internal_command()
4103  * @adapter - pointer to our soft state
4104  * @mc - the mailbox command
4105  * @pthru - Passthru structure for DCDB commands
4106  *
4107  * Issue the internal commands in interrupt mode.
4108  * The last argument is the address of the passthru structure if the command
4109  * to be fired is a passthru command
4110  *
4111  * Note: parameter 'pthru' is null for non-passthru commands.
4112  */
4113 static int
4114 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4115 {
4116         unsigned long flags;
4117         scb_t   *scb;
4118         int     rval;
4119 
4120         /*
4121          * The internal commands share one command id and hence are
4122          * serialized. This is so because we want to reserve maximum number of
4123          * available command ids for the I/O commands.
4124          */
4125         mutex_lock(&adapter->int_mtx);
4126 
4127         scb = &adapter->int_scb;
4128         memset(scb, 0, sizeof(scb_t));
4129 
4130         scb->idx = CMDID_INT_CMDS;
4131         scb->state |= SCB_ACTIVE | SCB_PENDQ;
4132 
4133         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4134 
4135         /*
4136          * Is it a passthru command
4137          */
4138         if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4139                 scb->pthru = pthru;
4140 
4141         spin_lock_irqsave(&adapter->lock, flags);
4142         list_add_tail(&scb->list, &adapter->pending_list);
4143         /*
4144          * Check if the HBA is in quiescent state, e.g., during a
4145          * delete logical drive opertion. If it is, don't run
4146          * the pending_list.
4147          */
4148         if (atomic_read(&adapter->quiescent) == 0)
4149                 mega_runpendq(adapter);
4150         spin_unlock_irqrestore(&adapter->lock, flags);
4151 
4152         wait_for_completion(&adapter->int_waitq);
4153 
4154         mc->status = rval = adapter->int_status;
4155 
4156         /*
4157          * Print a debug message for all failed commands. Applications can use
4158          * this information.
4159          */
4160         if (rval && trace_level) {
4161                 dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n",
4162                         mc->cmd, mc->opcode, mc->subopcode, rval);
4163         }
4164 
4165         mutex_unlock(&adapter->int_mtx);
4166         return rval;
4167 }
4168 
4169 static struct scsi_host_template megaraid_template = {
4170         .module                         = THIS_MODULE,
4171         .name                           = "MegaRAID",
4172         .proc_name                      = "megaraid_legacy",
4173         .info                           = megaraid_info,
4174         .queuecommand                   = megaraid_queue,       
4175         .bios_param                     = megaraid_biosparam,
4176         .max_sectors                    = MAX_SECTORS_PER_IO,
4177         .can_queue                      = MAX_COMMANDS,
4178         .this_id                        = DEFAULT_INITIATOR_ID,
4179         .sg_tablesize                   = MAX_SGLIST,
4180         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4181         .use_clustering                 = ENABLE_CLUSTERING,
4182         .eh_abort_handler               = megaraid_abort,
4183         .eh_device_reset_handler        = megaraid_reset,
4184         .eh_bus_reset_handler           = megaraid_reset,
4185         .eh_host_reset_handler          = megaraid_reset,
4186         .no_write_same                  = 1,
4187 };
4188 
4189 static int
4190 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4191 {
4192         struct Scsi_Host *host;
4193         adapter_t *adapter;
4194         unsigned long mega_baseport, tbase, flag = 0;
4195         u16 subsysid, subsysvid;
4196         u8 pci_bus, pci_dev_func;
4197         int irq, i, j;
4198         int error = -ENODEV;
4199 
4200         if (pci_enable_device(pdev))
4201                 goto out;
4202         pci_set_master(pdev);
4203 
4204         pci_bus = pdev->bus->number;
4205         pci_dev_func = pdev->devfn;
4206 
4207         /*
4208          * The megaraid3 stuff reports the ID of the Intel part which is not
4209          * remotely specific to the megaraid
4210          */
4211         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4212                 u16 magic;
4213                 /*
4214                  * Don't fall over the Compaq management cards using the same
4215                  * PCI identifier
4216                  */
4217                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4218                     pdev->subsystem_device == 0xC000)
4219                         return -ENODEV;
4220                 /* Now check the magic signature byte */
4221                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4222                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4223                         return -ENODEV;
4224                 /* Ok it is probably a megaraid */
4225         }
4226 
4227         /*
4228          * For these vendor and device ids, signature offsets are not
4229          * valid and 64 bit is implicit
4230          */
4231         if (id->driver_data & BOARD_64BIT)
4232                 flag |= BOARD_64BIT;
4233         else {
4234                 u32 magic64;
4235 
4236                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4237                 if (magic64 == HBA_SIGNATURE_64BIT)
4238                         flag |= BOARD_64BIT;
4239         }
4240 
4241         subsysvid = pdev->subsystem_vendor;
4242         subsysid = pdev->subsystem_device;
4243 
4244         dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n",
4245                 id->vendor, id->device);
4246 
4247         /* Read the base port and IRQ from PCI */
4248         mega_baseport = pci_resource_start(pdev, 0);
4249         irq = pdev->irq;
4250 
4251         tbase = mega_baseport;
4252         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4253                 flag |= BOARD_MEMMAP;
4254 
4255                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4256                         dev_warn(&pdev->dev, "mem region busy!\n");
4257                         goto out_disable_device;
4258                 }
4259 
4260                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4261                 if (!mega_baseport) {
4262                         dev_warn(&pdev->dev, "could not map hba memory\n");
4263                         goto out_release_region;
4264                 }
4265         } else {
4266                 flag |= BOARD_IOMAP;
4267                 mega_baseport += 0x10;
4268 
4269                 if (!request_region(mega_baseport, 16, "megaraid"))
4270                         goto out_disable_device;
4271         }
4272 
4273         /* Initialize SCSI Host structure */
4274         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4275         if (!host)
4276                 goto out_iounmap;
4277 
4278         adapter = (adapter_t *)host->hostdata;
4279         memset(adapter, 0, sizeof(adapter_t));
4280 
4281         dev_notice(&pdev->dev,
4282                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4283                 host->host_no, mega_baseport, irq);
4284 
4285         adapter->base = mega_baseport;
4286         if (flag & BOARD_MEMMAP)
4287                 adapter->mmio_base = (void __iomem *) mega_baseport;
4288 
4289         INIT_LIST_HEAD(&adapter->free_list);
4290         INIT_LIST_HEAD(&adapter->pending_list);
4291         INIT_LIST_HEAD(&adapter->completed_list);
4292 
4293         adapter->flag = flag;
4294         spin_lock_init(&adapter->lock);
4295 
4296         host->cmd_per_lun = max_cmd_per_lun;
4297         host->max_sectors = max_sectors_per_io;
4298 
4299         adapter->dev = pdev;
4300         adapter->host = host;
4301 
4302         adapter->host->irq = irq;
4303 
4304         if (flag & BOARD_MEMMAP)
4305                 adapter->host->base = tbase;
4306         else {
4307                 adapter->host->io_port = tbase;
4308                 adapter->host->n_io_port = 16;
4309         }
4310 
4311         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4312 
4313         /*
4314          * Allocate buffer to issue internal commands.
4315          */
4316         adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
4317                 MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
4318         if (!adapter->mega_buffer) {
4319                 dev_warn(&pdev->dev, "out of RAM\n");
4320                 goto out_host_put;
4321         }
4322 
4323         adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
4324         if (!adapter->scb_list) {
4325                 dev_warn(&pdev->dev, "out of RAM\n");
4326                 goto out_free_cmd_buffer;
4327         }
4328 
4329         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4330                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4331                                         IRQF_SHARED, "megaraid", adapter)) {
4332                 dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq);
4333                 goto out_free_scb_list;
4334         }
4335 
4336         if (mega_setup_mailbox(adapter))
4337                 goto out_free_irq;
4338 
4339         if (mega_query_adapter(adapter))
4340                 goto out_free_mbox;
4341 
4342         /*
4343          * Have checks for some buggy f/w
4344          */
4345         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4346                 /*
4347                  * Which firmware
4348                  */
4349                 if (!strcmp(adapter->fw_version, "3.00") ||
4350                                 !strcmp(adapter->fw_version, "3.01")) {
4351 
4352                         dev_warn(&pdev->dev,
4353                                 "Your card is a Dell PERC "
4354                                 "2/SC RAID controller with "
4355                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4356                                 "This driver is known to have "
4357                                 "corruption issues\nmegaraid: with "
4358                                 "those firmware versions on this "
4359                                 "specific card.  In order\nmegaraid: "
4360                                 "to protect your data, please upgrade "
4361                                 "your firmware to version\nmegaraid: "
4362                                 "3.10 or later, available from the "
4363                                 "Dell Technical Support web\n"
4364                                 "megaraid: site at\nhttp://support."
4365                                 "dell.com/us/en/filelib/download/"
4366                                 "index.asp?fileid=2940\n"
4367                         );
4368                 }
4369         }
4370 
4371         /*
4372          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4373          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4374          * support, since this firmware cannot handle 64 bit
4375          * addressing
4376          */
4377         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4378             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4379                 /*
4380                  * which firmware
4381                  */
4382                 if (!strcmp(adapter->fw_version, "H01.07") ||
4383                     !strcmp(adapter->fw_version, "H01.08") ||
4384                     !strcmp(adapter->fw_version, "H01.09") ) {
4385                         dev_warn(&pdev->dev,
4386                                 "Firmware H.01.07, "
4387                                 "H.01.08, and H.01.09 on 1M/2M "
4388                                 "controllers\n"
4389                                 "do not support 64 bit "
4390                                 "addressing.\nDISABLING "
4391                                 "64 bit support.\n");
4392                         adapter->flag &= ~BOARD_64BIT;
4393                 }
4394         }
4395 
4396         if (mega_is_bios_enabled(adapter))
4397                 mega_hbas[hba_count].is_bios_enabled = 1;
4398         mega_hbas[hba_count].hostdata_addr = adapter;
4399 
4400         /*
4401          * Find out which channel is raid and which is scsi. This is
4402          * for ROMB support.
4403          */
4404         mega_enum_raid_scsi(adapter);
4405 
4406         /*
4407          * Find out if a logical drive is set as the boot drive. If
4408          * there is one, will make that as the first logical drive.
4409          * ROMB: Do we have to boot from a physical drive. Then all
4410          * the physical drives would appear before the logical disks.
4411          * Else, all the physical drives would be exported to the mid
4412          * layer after logical drives.
4413          */
4414         mega_get_boot_drv(adapter);
4415 
4416         if (adapter->boot_pdrv_enabled) {
4417                 j = adapter->product_info.nchannels;
4418                 for( i = 0; i < j; i++ )
4419                         adapter->logdrv_chan[i] = 0;
4420                 for( i = j; i < NVIRT_CHAN + j; i++ )
4421                         adapter->logdrv_chan[i] = 1;
4422         } else {
4423                 for (i = 0; i < NVIRT_CHAN; i++)
4424                         adapter->logdrv_chan[i] = 1;
4425                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4426                         adapter->logdrv_chan[i] = 0;
4427                 adapter->mega_ch_class <<= NVIRT_CHAN;
4428         }
4429 
4430         /*
4431          * Do we support random deletion and addition of logical
4432          * drives
4433          */
4434         adapter->read_ldidmap = 0;      /* set it after first logdrv
4435                                                    delete cmd */
4436         adapter->support_random_del = mega_support_random_del(adapter);
4437 
4438         /* Initialize SCBs */
4439         if (mega_init_scb(adapter))
4440                 goto out_free_mbox;
4441 
4442         /*
4443          * Reset the pending commands counter
4444          */
4445         atomic_set(&adapter->pend_cmds, 0);
4446 
4447         /*
4448          * Reset the adapter quiescent flag
4449          */
4450         atomic_set(&adapter->quiescent, 0);
4451 
4452         hba_soft_state[hba_count] = adapter;
4453 
4454         /*
4455          * Fill in the structure which needs to be passed back to the
4456          * application when it does an ioctl() for controller related
4457          * information.
4458          */
4459         i = hba_count;
4460 
4461         mcontroller[i].base = mega_baseport;
4462         mcontroller[i].irq = irq;
4463         mcontroller[i].numldrv = adapter->numldrv;
4464         mcontroller[i].pcibus = pci_bus;
4465         mcontroller[i].pcidev = id->device;
4466         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4467         mcontroller[i].pciid = -1;
4468         mcontroller[i].pcivendor = id->vendor;
4469         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4470         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4471 
4472 
4473         /* Set the Mode of addressing to 64 bit if we can */
4474         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4475                 pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4476                 adapter->has_64bit_addr = 1;
4477         } else  {
4478                 pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4479                 adapter->has_64bit_addr = 0;
4480         }
4481                 
4482         mutex_init(&adapter->int_mtx);
4483         init_completion(&adapter->int_waitq);
4484 
4485         adapter->this_id = DEFAULT_INITIATOR_ID;
4486         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4487 
4488 #if MEGA_HAVE_CLUSTERING
4489         /*
4490          * Is cluster support enabled on this controller
4491          * Note: In a cluster the HBAs ( the initiators ) will have
4492          * different target IDs and we cannot assume it to be 7. Call
4493          * to mega_support_cluster() will get the target ids also if
4494          * the cluster support is available
4495          */
4496         adapter->has_cluster = mega_support_cluster(adapter);
4497         if (adapter->has_cluster) {
4498                 dev_notice(&pdev->dev,
4499                         "Cluster driver, initiator id:%d\n",
4500                         adapter->this_id);
4501         }
4502 #endif
4503 
4504         pci_set_drvdata(pdev, host);
4505 
4506         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4507 
4508         error = scsi_add_host(host, &pdev->dev);
4509         if (error)
4510                 goto out_free_mbox;
4511 
4512         scsi_scan_host(host);
4513         hba_count++;
4514         return 0;
4515 
4516  out_free_mbox:
4517         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4518                         adapter->una_mbox64, adapter->una_mbox64_dma);
4519  out_free_irq:
4520         free_irq(adapter->host->irq, adapter);
4521  out_free_scb_list:
4522         kfree(adapter->scb_list);
4523  out_free_cmd_buffer:
4524         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4525                         adapter->mega_buffer, adapter->buf_dma_handle);
4526  out_host_put:
4527         scsi_host_put(host);
4528  out_iounmap:
4529         if (flag & BOARD_MEMMAP)
4530                 iounmap((void *)mega_baseport);
4531  out_release_region:
4532         if (flag & BOARD_MEMMAP)
4533                 release_mem_region(tbase, 128);
4534         else
4535                 release_region(mega_baseport, 16);
4536  out_disable_device:
4537         pci_disable_device(pdev);
4538  out:
4539         return error;
4540 }
4541 
4542 static void
4543 __megaraid_shutdown(adapter_t *adapter)
4544 {
4545         u_char  raw_mbox[sizeof(struct mbox_out)];
4546         mbox_t  *mbox = (mbox_t *)raw_mbox;
4547         int     i;
4548 
4549         /* Flush adapter cache */
4550         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4551         raw_mbox[0] = FLUSH_ADAPTER;
4552 
4553         free_irq(adapter->host->irq, adapter);
4554 
4555         /* Issue a blocking (interrupts disabled) command to the card */
4556         issue_scb_block(adapter, raw_mbox);
4557 
4558         /* Flush disks cache */
4559         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4560         raw_mbox[0] = FLUSH_SYSTEM;
4561 
4562         /* Issue a blocking (interrupts disabled) command to the card */
4563         issue_scb_block(adapter, raw_mbox);
4564         
4565         if (atomic_read(&adapter->pend_cmds) > 0)
4566                 dev_warn(&adapter->dev->dev, "pending commands!!\n");
4567 
4568         /*
4569          * Have a delibrate delay to make sure all the caches are
4570          * actually flushed.
4571          */
4572         for (i = 0; i <= 10; i++)
4573                 mdelay(1000);
4574 }
4575 
4576 static void
4577 megaraid_remove_one(struct pci_dev *pdev)
4578 {
4579         struct Scsi_Host *host = pci_get_drvdata(pdev);
4580         adapter_t *adapter = (adapter_t *)host->hostdata;
4581 
4582         scsi_remove_host(host);
4583 
4584         __megaraid_shutdown(adapter);
4585 
4586         /* Free our resources */
4587         if (adapter->flag & BOARD_MEMMAP) {
4588                 iounmap((void *)adapter->base);
4589                 release_mem_region(adapter->host->base, 128);
4590         } else
4591                 release_region(adapter->base, 16);
4592 
4593         mega_free_sgl(adapter);
4594 
4595 #ifdef CONFIG_PROC_FS
4596         if (adapter->controller_proc_dir_entry) {
4597                 remove_proc_entry("stat", adapter->controller_proc_dir_entry);
4598                 remove_proc_entry("config",
4599                                 adapter->controller_proc_dir_entry);
4600                 remove_proc_entry("mailbox",
4601                                 adapter->controller_proc_dir_entry);
4602 #if MEGA_HAVE_ENH_PROC
4603                 remove_proc_entry("rebuild-rate",
4604                                 adapter->controller_proc_dir_entry);
4605                 remove_proc_entry("battery-status",
4606                                 adapter->controller_proc_dir_entry);
4607 
4608                 remove_proc_entry("diskdrives-ch0",
4609                                 adapter->controller_proc_dir_entry);
4610                 remove_proc_entry("diskdrives-ch1",
4611                                 adapter->controller_proc_dir_entry);
4612                 remove_proc_entry("diskdrives-ch2",
4613                                 adapter->controller_proc_dir_entry);
4614                 remove_proc_entry("diskdrives-ch3",
4615                                 adapter->controller_proc_dir_entry);
4616 
4617                 remove_proc_entry("raiddrives-0-9",
4618                                 adapter->controller_proc_dir_entry);
4619                 remove_proc_entry("raiddrives-10-19",
4620                                 adapter->controller_proc_dir_entry);
4621                 remove_proc_entry("raiddrives-20-29",
4622                                 adapter->controller_proc_dir_entry);
4623                 remove_proc_entry("raiddrives-30-39",
4624                                 adapter->controller_proc_dir_entry);
4625 #endif
4626                 {
4627                         char    buf[12] = { 0 };
4628                         sprintf(buf, "hba%d", adapter->host->host_no);
4629                         remove_proc_entry(buf, mega_proc_dir_entry);
4630                 }
4631         }
4632 #endif
4633 
4634         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4635                         adapter->mega_buffer, adapter->buf_dma_handle);
4636         kfree(adapter->scb_list);
4637         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4638                         adapter->una_mbox64, adapter->una_mbox64_dma);
4639 
4640         scsi_host_put(host);
4641         pci_disable_device(pdev);
4642 
4643         hba_count--;
4644 }
4645 
4646 static void
4647 megaraid_shutdown(struct pci_dev *pdev)
4648 {
4649         struct Scsi_Host *host = pci_get_drvdata(pdev);
4650         adapter_t *adapter = (adapter_t *)host->hostdata;
4651 
4652         __megaraid_shutdown(adapter);
4653 }
4654 
4655 static struct pci_device_id megaraid_pci_tbl[] = {
4656         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4657                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4658         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4659                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4660         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4661                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4662         {0,}
4663 };
4664 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4665 
4666 static struct pci_driver megaraid_pci_driver = {
4667         .name           = "megaraid_legacy",
4668         .id_table       = megaraid_pci_tbl,
4669         .probe          = megaraid_probe_one,
4670         .remove         = megaraid_remove_one,
4671         .shutdown       = megaraid_shutdown,
4672 };
4673 
4674 static int __init megaraid_init(void)
4675 {
4676         int error;
4677 
4678         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4679                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4680         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4681                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4682 
4683 #ifdef CONFIG_PROC_FS
4684         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4685         if (!mega_proc_dir_entry) {
4686                 printk(KERN_WARNING
4687                                 "megaraid: failed to create megaraid root\n");
4688         }
4689 #endif
4690         error = pci_register_driver(&megaraid_pci_driver);
4691         if (error) {
4692 #ifdef CONFIG_PROC_FS
4693                 remove_proc_entry("megaraid", NULL);
4694 #endif
4695                 return error;
4696         }
4697 
4698         /*
4699          * Register the driver as a character device, for applications
4700          * to access it for ioctls.
4701          * First argument (major) to register_chrdev implies a dynamic
4702          * major number allocation.
4703          */
4704         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4705         if (!major) {
4706                 printk(KERN_WARNING
4707                                 "megaraid: failed to register char device\n");
4708         }
4709 
4710         return 0;
4711 }
4712 
4713 static void __exit megaraid_exit(void)
4714 {
4715         /*
4716          * Unregister the character device interface to the driver.
4717          */
4718         unregister_chrdev(major, "megadev_legacy");
4719 
4720         pci_unregister_driver(&megaraid_pci_driver);
4721 
4722 #ifdef CONFIG_PROC_FS
4723         remove_proc_entry("megaraid", NULL);
4724 #endif
4725 }
4726 
4727 module_init(megaraid_init);
4728 module_exit(megaraid_exit);
4729 
4730 /* vi: set ts=8 sw=8 tw=78: */
4731 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us