[SCSI] lpfc 8.3.25: Adapter Interface fixes and changes
[linux-2.6.git] / drivers / scsi / 3w-sas.c
1 /*
2    3w-sas.c -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux.
3
4    Written By: Adam Radford <linuxraid@lsi.com>
5
6    Copyright (C) 2009 LSI Corporation.
7
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; version 2 of the License.
11
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16
17    NO WARRANTY
18    THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
19    CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
20    LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
21    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
22    solely responsible for determining the appropriateness of using and
23    distributing the Program and assumes all risks associated with its
24    exercise of rights under this Agreement, including but not limited to
25    the risks and costs of program errors, damage to or loss of data,
26    programs or equipment, and unavailability or interruption of operations.
27
28    DISCLAIMER OF LIABILITY
29    NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
30    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31    DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
32    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
33    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
34    USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
35    HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
36
37    You should have received a copy of the GNU General Public License
38    along with this program; if not, write to the Free Software
39    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
40
41    Controllers supported by this driver:
42
43    LSI 3ware 9750 6Gb/s SAS/SATA-RAID
44
45    Bugs/Comments/Suggestions should be mailed to:
46    linuxraid@lsi.com
47
48    For more information, goto:
49    http://www.lsi.com
50
51    History
52    -------
53    3.26.02.000 - Initial driver release.
54 */
55
56 #include <linux/module.h>
57 #include <linux/reboot.h>
58 #include <linux/spinlock.h>
59 #include <linux/interrupt.h>
60 #include <linux/moduleparam.h>
61 #include <linux/errno.h>
62 #include <linux/types.h>
63 #include <linux/delay.h>
64 #include <linux/pci.h>
65 #include <linux/time.h>
66 #include <linux/mutex.h>
67 #include <linux/slab.h>
68 #include <asm/io.h>
69 #include <asm/irq.h>
70 #include <asm/uaccess.h>
71 #include <scsi/scsi.h>
72 #include <scsi/scsi_host.h>
73 #include <scsi/scsi_tcq.h>
74 #include <scsi/scsi_cmnd.h>
75 #include "3w-sas.h"
76
77 /* Globals */
78 #define TW_DRIVER_VERSION "3.26.02.000"
79 static DEFINE_MUTEX(twl_chrdev_mutex);
80 static TW_Device_Extension *twl_device_extension_list[TW_MAX_SLOT];
81 static unsigned int twl_device_extension_count;
82 static int twl_major = -1;
83 extern struct timezone sys_tz;
84
85 /* Module parameters */
86 MODULE_AUTHOR ("LSI");
87 MODULE_DESCRIPTION ("LSI 3ware SAS/SATA-RAID Linux Driver");
88 MODULE_LICENSE("GPL");
89 MODULE_VERSION(TW_DRIVER_VERSION);
90
91 static int use_msi;
92 module_param(use_msi, int, S_IRUGO);
93 MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts. Default: 0");
94
95 /* Function prototypes */
96 static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset);
97
98 /* Functions */
99
100 /* This function returns AENs through sysfs */
101 static ssize_t twl_sysfs_aen_read(struct file *filp, struct kobject *kobj,
102                                   struct bin_attribute *bin_attr,
103                                   char *outbuf, loff_t offset, size_t count)
104 {
105         struct device *dev = container_of(kobj, struct device, kobj);
106         struct Scsi_Host *shost = class_to_shost(dev);
107         TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
108         unsigned long flags = 0;
109         ssize_t ret;
110
111         if (!capable(CAP_SYS_ADMIN))
112                 return -EACCES;
113
114         spin_lock_irqsave(tw_dev->host->host_lock, flags);
115         ret = memory_read_from_buffer(outbuf, count, &offset, tw_dev->event_queue[0], sizeof(TW_Event) * TW_Q_LENGTH);
116         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
117
118         return ret;
119 } /* End twl_sysfs_aen_read() */
120
121 /* aen_read sysfs attribute initializer */
122 static struct bin_attribute twl_sysfs_aen_read_attr = {
123         .attr = {
124                 .name = "3ware_aen_read",
125                 .mode = S_IRUSR,
126         }, 
127         .size = 0,
128         .read = twl_sysfs_aen_read
129 };
130
131 /* This function returns driver compatibility info through sysfs */
132 static ssize_t twl_sysfs_compat_info(struct file *filp, struct kobject *kobj,
133                                      struct bin_attribute *bin_attr,
134                                      char *outbuf, loff_t offset, size_t count)
135 {
136         struct device *dev = container_of(kobj, struct device, kobj);
137         struct Scsi_Host *shost = class_to_shost(dev);
138         TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
139         unsigned long flags = 0;
140         ssize_t ret;
141
142         if (!capable(CAP_SYS_ADMIN))
143                 return -EACCES;
144
145         spin_lock_irqsave(tw_dev->host->host_lock, flags);
146         ret = memory_read_from_buffer(outbuf, count, &offset, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
147         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
148
149         return ret;
150 } /* End twl_sysfs_compat_info() */
151
152 /* compat_info sysfs attribute initializer */
153 static struct bin_attribute twl_sysfs_compat_info_attr = {
154         .attr = {
155                 .name = "3ware_compat_info",
156                 .mode = S_IRUSR,
157         }, 
158         .size = 0,
159         .read = twl_sysfs_compat_info
160 };
161
162 /* Show some statistics about the card */
163 static ssize_t twl_show_stats(struct device *dev,
164                               struct device_attribute *attr, char *buf)
165 {
166         struct Scsi_Host *host = class_to_shost(dev);
167         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
168         unsigned long flags = 0;
169         ssize_t len;
170
171         spin_lock_irqsave(tw_dev->host->host_lock, flags);
172         len = snprintf(buf, PAGE_SIZE, "3w-sas Driver version: %s\n"
173                        "Current commands posted:   %4d\n"
174                        "Max commands posted:       %4d\n"
175                        "Last sgl length:           %4d\n"
176                        "Max sgl length:            %4d\n"
177                        "Last sector count:         %4d\n"
178                        "Max sector count:          %4d\n"
179                        "SCSI Host Resets:          %4d\n"
180                        "AEN's:                     %4d\n", 
181                        TW_DRIVER_VERSION,
182                        tw_dev->posted_request_count,
183                        tw_dev->max_posted_request_count,
184                        tw_dev->sgl_entries,
185                        tw_dev->max_sgl_entries,
186                        tw_dev->sector_count,
187                        tw_dev->max_sector_count,
188                        tw_dev->num_resets,
189                        tw_dev->aen_count);
190         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
191         return len;
192 } /* End twl_show_stats() */
193
194 /* This function will set a devices queue depth */
195 static int twl_change_queue_depth(struct scsi_device *sdev, int queue_depth,
196                                   int reason)
197 {
198         if (reason != SCSI_QDEPTH_DEFAULT)
199                 return -EOPNOTSUPP;
200
201         if (queue_depth > TW_Q_LENGTH-2)
202                 queue_depth = TW_Q_LENGTH-2;
203         scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
204         return queue_depth;
205 } /* End twl_change_queue_depth() */
206
207 /* stats sysfs attribute initializer */
208 static struct device_attribute twl_host_stats_attr = {
209         .attr = {
210                 .name =         "3ware_stats",
211                 .mode =         S_IRUGO,
212         },
213         .show = twl_show_stats
214 };
215
216 /* Host attributes initializer */
217 static struct device_attribute *twl_host_attrs[] = {
218         &twl_host_stats_attr,
219         NULL,
220 };
221
222 /* This function will look up an AEN severity string */
223 static char *twl_aen_severity_lookup(unsigned char severity_code)
224 {
225         char *retval = NULL;
226
227         if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
228             (severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
229                 goto out;
230
231         retval = twl_aen_severity_table[severity_code];
232 out:
233         return retval;
234 } /* End twl_aen_severity_lookup() */
235
236 /* This function will queue an event */
237 static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
238 {
239         u32 local_time;
240         struct timeval time;
241         TW_Event *event;
242         unsigned short aen;
243         char host[16];
244         char *error_str;
245
246         tw_dev->aen_count++;
247
248         /* Fill out event info */
249         event = tw_dev->event_queue[tw_dev->error_index];
250
251         host[0] = '\0';
252         if (tw_dev->host)
253                 sprintf(host, " scsi%d:", tw_dev->host->host_no);
254
255         aen = le16_to_cpu(header->status_block.error);
256         memset(event, 0, sizeof(TW_Event));
257
258         event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
259         do_gettimeofday(&time);
260         local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60));
261         event->time_stamp_sec = local_time;
262         event->aen_code = aen;
263         event->retrieved = TW_AEN_NOT_RETRIEVED;
264         event->sequence_id = tw_dev->error_sequence_id;
265         tw_dev->error_sequence_id++;
266
267         /* Check for embedded error string */
268         error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);
269
270         header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
271         event->parameter_len = strlen(header->err_specific_desc);
272         memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + 1 + strlen(error_str));
273         if (event->severity != TW_AEN_SEVERITY_DEBUG)
274                 printk(KERN_WARNING "3w-sas:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
275                        host,
276                        twl_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
277                        TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, error_str,
278                        header->err_specific_desc);
279         else
280                 tw_dev->aen_count--;
281
282         tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
283 } /* End twl_aen_queue_event() */
284
285 /* This function will attempt to post a command packet to the board */
286 static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
287 {
288         dma_addr_t command_que_value;
289
290         command_que_value = tw_dev->command_packet_phys[request_id];
291         command_que_value += TW_COMMAND_OFFSET;
292
293         /* First write upper 4 bytes */
294         writel((u32)((u64)command_que_value >> 32), TWL_HIBQPH_REG_ADDR(tw_dev));
295         /* Then the lower 4 bytes */
296         writel((u32)(command_que_value | TWL_PULL_MODE), TWL_HIBQPL_REG_ADDR(tw_dev));
297
298         tw_dev->state[request_id] = TW_S_POSTED;
299         tw_dev->posted_request_count++;
300         if (tw_dev->posted_request_count > tw_dev->max_posted_request_count)
301                 tw_dev->max_posted_request_count = tw_dev->posted_request_count;
302
303         return 0;
304 } /* End twl_post_command_packet() */
305
306 /* This function will perform a pci-dma mapping for a scatter gather list */
307 static int twl_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
308 {
309         int use_sg;
310         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
311
312         use_sg = scsi_dma_map(cmd);
313         if (!use_sg)
314                 return 0;
315         else if (use_sg < 0) {
316                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Failed to map scatter gather list");
317                 return 0;
318         }
319
320         cmd->SCp.phase = TW_PHASE_SGLIST;
321         cmd->SCp.have_data_in = use_sg;
322
323         return use_sg;
324 } /* End twl_map_scsi_sg_data() */
325
326 /* This function hands scsi cdb's to the firmware */
327 static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg)
328 {
329         TW_Command_Full *full_command_packet;
330         TW_Command_Apache *command_packet;
331         int i, sg_count;
332         struct scsi_cmnd *srb = NULL;
333         struct scatterlist *sglist = NULL, *sg;
334         int retval = 1;
335
336         if (tw_dev->srb[request_id]) {
337                 srb = tw_dev->srb[request_id];
338                 if (scsi_sglist(srb))
339                         sglist = scsi_sglist(srb);
340         }
341
342         /* Initialize command packet */
343         full_command_packet = tw_dev->command_packet_virt[request_id];
344         full_command_packet->header.header_desc.size_header = 128;
345         full_command_packet->header.status_block.error = 0;
346         full_command_packet->header.status_block.severity__reserved = 0;
347
348         command_packet = &full_command_packet->command.newcommand;
349         command_packet->status = 0;
350         command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);
351
352         /* We forced 16 byte cdb use earlier */
353         if (!cdb)
354                 memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
355         else
356                 memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);
357
358         if (srb) {
359                 command_packet->unit = srb->device->id;
360                 command_packet->request_id__lunl =
361                         cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
362         } else {
363                 command_packet->request_id__lunl =
364                         cpu_to_le16(TW_REQ_LUN_IN(0, request_id));
365                 command_packet->unit = 0;
366         }
367
368         command_packet->sgl_offset = 16;
369
370         if (!sglistarg) {
371                 /* Map sglist from scsi layer to cmd packet */
372                 if (scsi_sg_count(srb)) {
373                         sg_count = twl_map_scsi_sg_data(tw_dev, request_id);
374                         if (sg_count == 0)
375                                 goto out;
376
377                         scsi_for_each_sg(srb, sg, sg_count, i) {
378                                 command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
379                                 command_packet->sg_list[i].length = TW_CPU_TO_SGL(sg_dma_len(sg));
380                         }
381                         command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id])));
382                 }
383         } else {
384                 /* Internal cdb post */
385                 for (i = 0; i < use_sg; i++) {
386                         command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address);
387                         command_packet->sg_list[i].length = TW_CPU_TO_SGL(sglistarg[i].length);
388                 }
389                 command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
390         }
391
392         /* Update some stats */
393         if (srb) {
394                 tw_dev->sector_count = scsi_bufflen(srb) / 512;
395                 if (tw_dev->sector_count > tw_dev->max_sector_count)
396                         tw_dev->max_sector_count = tw_dev->sector_count;
397                 tw_dev->sgl_entries = scsi_sg_count(srb);
398                 if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
399                         tw_dev->max_sgl_entries = tw_dev->sgl_entries;
400         }
401
402         /* Now post the command to the board */
403         retval = twl_post_command_packet(tw_dev, request_id);
404
405 out:
406         return retval;
407 } /* End twl_scsiop_execute_scsi() */
408
409 /* This function will read the aen queue from the isr */
410 static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
411 {
412         char cdb[TW_MAX_CDB_LEN];
413         TW_SG_Entry_ISO sglist[1];
414         TW_Command_Full *full_command_packet;
415         int retval = 1;
416
417         full_command_packet = tw_dev->command_packet_virt[request_id];
418         memset(full_command_packet, 0, sizeof(TW_Command_Full));
419
420         /* Initialize cdb */
421         memset(&cdb, 0, TW_MAX_CDB_LEN);
422         cdb[0] = REQUEST_SENSE; /* opcode */
423         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
424
425         /* Initialize sglist */
426         memset(&sglist, 0, sizeof(TW_SG_Entry_ISO));
427         sglist[0].length = TW_SECTOR_SIZE;
428         sglist[0].address = tw_dev->generic_buffer_phys[request_id];
429
430         /* Mark internal command */
431         tw_dev->srb[request_id] = NULL;
432
433         /* Now post the command packet */
434         if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
435                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Post failed while reading AEN queue");
436                 goto out;
437         }
438         retval = 0;
439 out:
440         return retval;
441 } /* End twl_aen_read_queue() */
442
443 /* This function will sync firmware time with the host time */
444 static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
445 {
446         u32 schedulertime;
447         struct timeval utc;
448         TW_Command_Full *full_command_packet;
449         TW_Command *command_packet;
450         TW_Param_Apache *param;
451         u32 local_time;
452
453         /* Fill out the command packet */
454         full_command_packet = tw_dev->command_packet_virt[request_id];
455         memset(full_command_packet, 0, sizeof(TW_Command_Full));
456         command_packet = &full_command_packet->command.oldcommand;
457         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
458         command_packet->request_id = request_id;
459         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
460         command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE);
461         command_packet->size = TW_COMMAND_SIZE;
462         command_packet->byte6_offset.parameter_count = cpu_to_le16(1);
463
464         /* Setup the param */
465         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
466         memset(param, 0, TW_SECTOR_SIZE);
467         param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */
468         param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
469         param->parameter_size_bytes = cpu_to_le16(4);
470
471         /* Convert system time in UTC to local time seconds since last 
472            Sunday 12:00AM */
473         do_gettimeofday(&utc);
474         local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
475         schedulertime = local_time - (3 * 86400);
476         schedulertime = cpu_to_le32(schedulertime % 604800);
477
478         memcpy(param->data, &schedulertime, sizeof(u32));
479
480         /* Mark internal command */
481         tw_dev->srb[request_id] = NULL;
482
483         /* Now post the command */
484         twl_post_command_packet(tw_dev, request_id);
485 } /* End twl_aen_sync_time() */
486
487 /* This function will assign an available request id */
488 static void twl_get_request_id(TW_Device_Extension *tw_dev, int *request_id)
489 {
490         *request_id = tw_dev->free_queue[tw_dev->free_head];
491         tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
492         tw_dev->state[*request_id] = TW_S_STARTED;
493 } /* End twl_get_request_id() */
494
495 /* This function will free a request id */
496 static void twl_free_request_id(TW_Device_Extension *tw_dev, int request_id)
497 {
498         tw_dev->free_queue[tw_dev->free_tail] = request_id;
499         tw_dev->state[request_id] = TW_S_FINISHED;
500         tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
501 } /* End twl_free_request_id() */
502
503 /* This function will complete an aen request from the isr */
504 static int twl_aen_complete(TW_Device_Extension *tw_dev, int request_id)
505 {
506         TW_Command_Full *full_command_packet;
507         TW_Command *command_packet;
508         TW_Command_Apache_Header *header;
509         unsigned short aen;
510         int retval = 1;
511
512         header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
513         tw_dev->posted_request_count--;
514         aen = le16_to_cpu(header->status_block.error);
515         full_command_packet = tw_dev->command_packet_virt[request_id];
516         command_packet = &full_command_packet->command.oldcommand;
517
518         /* First check for internal completion of set param for time sync */
519         if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
520                 /* Keep reading the queue in case there are more aen's */
521                 if (twl_aen_read_queue(tw_dev, request_id))
522                         goto out2;
523                 else {
524                         retval = 0;
525                         goto out;
526                 }
527         }
528
529         switch (aen) {
530         case TW_AEN_QUEUE_EMPTY:
531                 /* Quit reading the queue if this is the last one */
532                 break;
533         case TW_AEN_SYNC_TIME_WITH_HOST:
534                 twl_aen_sync_time(tw_dev, request_id);
535                 retval = 0;
536                 goto out;
537         default:
538                 twl_aen_queue_event(tw_dev, header);
539
540                 /* If there are more aen's, keep reading the queue */
541                 if (twl_aen_read_queue(tw_dev, request_id))
542                         goto out2;
543                 else {
544                         retval = 0;
545                         goto out;
546                 }
547         }
548         retval = 0;
549 out2:
550         tw_dev->state[request_id] = TW_S_COMPLETED;
551         twl_free_request_id(tw_dev, request_id);
552         clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
553 out:
554         return retval;
555 } /* End twl_aen_complete() */
556
557 /* This function will poll for a response */
558 static int twl_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
559 {
560         unsigned long before;
561         dma_addr_t mfa;
562         u32 regh, regl;
563         u32 response;
564         int retval = 1;
565         int found = 0;
566
567         before = jiffies;
568
569         while (!found) {
570                 if (sizeof(dma_addr_t) > 4) {
571                         regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
572                         regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
573                         mfa = ((u64)regh << 32) | regl;
574                 } else
575                         mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
576
577                 response = (u32)mfa;
578
579                 if (TW_RESID_OUT(response) == request_id)
580                         found = 1;
581
582                 if (time_after(jiffies, before + HZ * seconds))
583                         goto out;
584
585                 msleep(50);
586         }
587         retval = 0;
588 out: 
589         return retval;
590 } /* End twl_poll_response() */
591
592 /* This function will drain the aen queue */
593 static int twl_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
594 {
595         int request_id = 0;
596         char cdb[TW_MAX_CDB_LEN];
597         TW_SG_Entry_ISO sglist[1];
598         int finished = 0, count = 0;
599         TW_Command_Full *full_command_packet;
600         TW_Command_Apache_Header *header;
601         unsigned short aen;
602         int first_reset = 0, queue = 0, retval = 1;
603
604         if (no_check_reset)
605                 first_reset = 0;
606         else
607                 first_reset = 1;
608
609         full_command_packet = tw_dev->command_packet_virt[request_id];
610         memset(full_command_packet, 0, sizeof(TW_Command_Full));
611
612         /* Initialize cdb */
613         memset(&cdb, 0, TW_MAX_CDB_LEN);
614         cdb[0] = REQUEST_SENSE; /* opcode */
615         cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
616
617         /* Initialize sglist */
618         memset(&sglist, 0, sizeof(TW_SG_Entry_ISO));
619         sglist[0].length = TW_SECTOR_SIZE;
620         sglist[0].address = tw_dev->generic_buffer_phys[request_id];
621
622         /* Mark internal command */
623         tw_dev->srb[request_id] = NULL;
624
625         do {
626                 /* Send command to the board */
627                 if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
628                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "Error posting request sense");
629                         goto out;
630                 }
631
632                 /* Now poll for completion */
633                 if (twl_poll_response(tw_dev, request_id, 30)) {
634                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "No valid response while draining AEN queue");
635                         tw_dev->posted_request_count--;
636                         goto out;
637                 }
638
639                 tw_dev->posted_request_count--;
640                 header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
641                 aen = le16_to_cpu(header->status_block.error);
642                 queue = 0;
643                 count++;
644
645                 switch (aen) {
646                 case TW_AEN_QUEUE_EMPTY:
647                         if (first_reset != 1)
648                                 goto out;
649                         else
650                                 finished = 1;
651                         break;
652                 case TW_AEN_SOFT_RESET:
653                         if (first_reset == 0)
654                                 first_reset = 1;
655                         else
656                                 queue = 1;
657                         break;
658                 case TW_AEN_SYNC_TIME_WITH_HOST:
659                         break;
660                 default:
661                         queue = 1;
662                 }
663
664                 /* Now queue an event info */
665                 if (queue)
666                         twl_aen_queue_event(tw_dev, header);
667         } while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));
668
669         if (count == TW_MAX_AEN_DRAIN)
670                 goto out;
671
672         retval = 0;
673 out:
674         tw_dev->state[request_id] = TW_S_INITIAL;
675         return retval;
676 } /* End twl_aen_drain_queue() */
677
678 /* This function will allocate memory and check if it is correctly aligned */
679 static int twl_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
680 {
681         int i;
682         dma_addr_t dma_handle;
683         unsigned long *cpu_addr;
684         int retval = 1;
685
686         cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
687         if (!cpu_addr) {
688                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
689                 goto out;
690         }
691
692         memset(cpu_addr, 0, size*TW_Q_LENGTH);
693
694         for (i = 0; i < TW_Q_LENGTH; i++) {
695                 switch(which) {
696                 case 0:
697                         tw_dev->command_packet_phys[i] = dma_handle+(i*size);
698                         tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
699                         break;
700                 case 1:
701                         tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
702                         tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
703                         break;
704                 case 2:
705                         tw_dev->sense_buffer_phys[i] = dma_handle+(i*size);
706                         tw_dev->sense_buffer_virt[i] = (TW_Command_Apache_Header *)((unsigned char *)cpu_addr + (i*size));
707                         break;
708                 }
709         }
710         retval = 0;
711 out:
712         return retval;
713 } /* End twl_allocate_memory() */
714
715 /* This function will load the request id and various sgls for ioctls */
716 static void twl_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length)
717 {
718         TW_Command *oldcommand;
719         TW_Command_Apache *newcommand;
720         TW_SG_Entry_ISO *sgl;
721         unsigned int pae = 0;
722
723         if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4))
724                 pae = 1;
725
726         if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
727                 newcommand = &full_command_packet->command.newcommand;
728                 newcommand->request_id__lunl =
729                         cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id));
730                 if (length) {
731                         newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
732                         newcommand->sg_list[0].length = TW_CPU_TO_SGL(length);
733                 }
734                 newcommand->sgl_entries__lunh =
735                         cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0));
736         } else {
737                 oldcommand = &full_command_packet->command.oldcommand;
738                 oldcommand->request_id = request_id;
739
740                 if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
741                         /* Load the sg list */
742                         sgl = (TW_SG_Entry_ISO *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry_ISO)/4) + pae + (sizeof(dma_addr_t) > 4 ? 1 : 0));
743                         sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
744                         sgl->length = TW_CPU_TO_SGL(length);
745                         oldcommand->size += pae;
746                         oldcommand->size += sizeof(dma_addr_t) > 4 ? 1 : 0;
747                 }
748         }
749 } /* End twl_load_sgl() */
750
751 /* This function handles ioctl for the character device
752    This interface is used by smartmontools open source software */
753 static long twl_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
754 {
755         long timeout;
756         unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
757         dma_addr_t dma_handle;
758         int request_id = 0;
759         TW_Ioctl_Driver_Command driver_command;
760         struct inode *inode = file->f_dentry->d_inode;
761         TW_Ioctl_Buf_Apache *tw_ioctl;
762         TW_Command_Full *full_command_packet;
763         TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)];
764         int retval = -EFAULT;
765         void __user *argp = (void __user *)arg;
766
767         mutex_lock(&twl_chrdev_mutex);
768
769         /* Only let one of these through at a time */
770         if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
771                 retval = -EINTR;
772                 goto out;
773         }
774
775         /* First copy down the driver command */
776         if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
777                 goto out2;
778
779         /* Check data buffer size */
780         if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) {
781                 retval = -EINVAL;
782                 goto out2;
783         }
784
785         /* Hardware can only do multiple of 512 byte transfers */
786         data_buffer_length_adjusted = (driver_command.buffer_length + 511) & ~511;
787
788         /* Now allocate ioctl buf memory */
789         cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, &dma_handle, GFP_KERNEL);
790         if (!cpu_addr) {
791                 retval = -ENOMEM;
792                 goto out2;
793         }
794
795         tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
796
797         /* Now copy down the entire ioctl */
798         if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1))
799                 goto out3;
800
801         /* See which ioctl we are doing */
802         switch (cmd) {
803         case TW_IOCTL_FIRMWARE_PASS_THROUGH:
804                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
805                 twl_get_request_id(tw_dev, &request_id);
806
807                 /* Flag internal command */
808                 tw_dev->srb[request_id] = NULL;
809
810                 /* Flag chrdev ioctl */
811                 tw_dev->chrdev_request_id = request_id;
812
813                 full_command_packet = (TW_Command_Full *)&tw_ioctl->firmware_command;
814
815                 /* Load request id and sglist for both command types */
816                 twl_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);
817
818                 memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));
819
820                 /* Now post the command packet to the controller */
821                 twl_post_command_packet(tw_dev, request_id);
822                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
823
824                 timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
825
826                 /* Now wait for command to complete */
827                 timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
828
829                 /* We timed out, and didn't get an interrupt */
830                 if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
831                         /* Now we need to reset the board */
832                         printk(KERN_WARNING "3w-sas: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
833                                tw_dev->host->host_no, TW_DRIVER, 0x6,
834                                cmd);
835                         retval = -EIO;
836                         twl_reset_device_extension(tw_dev, 1);
837                         goto out3;
838                 }
839
840                 /* Now copy in the command packet response */
841                 memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
842                 
843                 /* Now complete the io */
844                 spin_lock_irqsave(tw_dev->host->host_lock, flags);
845                 tw_dev->posted_request_count--;
846                 tw_dev->state[request_id] = TW_S_COMPLETED;
847                 twl_free_request_id(tw_dev, request_id);
848                 spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
849                 break;
850         default:
851                 retval = -ENOTTY;
852                 goto out3;
853         }
854
855         /* Now copy the entire response to userspace */
856         if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0)
857                 retval = 0;
858 out3:
859         /* Now free ioctl buf memory */
860         dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
861 out2:
862         mutex_unlock(&tw_dev->ioctl_lock);
863 out:
864         mutex_unlock(&twl_chrdev_mutex);
865         return retval;
866 } /* End twl_chrdev_ioctl() */
867
868 /* This function handles open for the character device */
869 static int twl_chrdev_open(struct inode *inode, struct file *file)
870 {
871         unsigned int minor_number;
872         int retval = -ENODEV;
873
874         if (!capable(CAP_SYS_ADMIN)) {
875                 retval = -EACCES;
876                 goto out;
877         }
878
879         minor_number = iminor(inode);
880         if (minor_number >= twl_device_extension_count)
881                 goto out;
882         retval = 0;
883 out:
884         return retval;
885 } /* End twl_chrdev_open() */
886
887 /* File operations struct for character device */
888 static const struct file_operations twl_fops = {
889         .owner          = THIS_MODULE,
890         .unlocked_ioctl = twl_chrdev_ioctl,
891         .open           = twl_chrdev_open,
892         .release        = NULL,
893         .llseek         = noop_llseek,
894 };
895
896 /* This function passes sense data from firmware to scsi layer */
897 static int twl_fill_sense(TW_Device_Extension *tw_dev, int i, int request_id, int copy_sense, int print_host)
898 {
899         TW_Command_Apache_Header *header;
900         TW_Command_Full *full_command_packet;
901         unsigned short error;
902         char *error_str;
903         int retval = 1;
904
905         header = tw_dev->sense_buffer_virt[i];
906         full_command_packet = tw_dev->command_packet_virt[request_id];
907
908         /* Get embedded firmware error string */
909         error_str = &(header->err_specific_desc[strlen(header->err_specific_desc) + 1]);
910
911         /* Don't print error for Logical unit not supported during rollcall */
912         error = le16_to_cpu(header->status_block.error);
913         if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE) && (error != TW_ERROR_INVALID_FIELD_IN_CDB)) {
914                 if (print_host)
915                         printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
916                                tw_dev->host->host_no,
917                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
918                                header->status_block.error,
919                                error_str, 
920                                header->err_specific_desc);
921                 else
922                         printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s:%s.\n",
923                                TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
924                                header->status_block.error,
925                                error_str,
926                                header->err_specific_desc);
927         }
928
929         if (copy_sense) {
930                 memcpy(tw_dev->srb[request_id]->sense_buffer, header->sense_data, TW_SENSE_DATA_LENGTH);
931                 tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
932                 goto out;
933         }
934 out:
935         return retval;
936 } /* End twl_fill_sense() */
937
938 /* This function will free up device extension resources */
939 static void twl_free_device_extension(TW_Device_Extension *tw_dev)
940 {
941         if (tw_dev->command_packet_virt[0])
942                 pci_free_consistent(tw_dev->tw_pci_dev,
943                                     sizeof(TW_Command_Full)*TW_Q_LENGTH,
944                                     tw_dev->command_packet_virt[0],
945                                     tw_dev->command_packet_phys[0]);
946
947         if (tw_dev->generic_buffer_virt[0])
948                 pci_free_consistent(tw_dev->tw_pci_dev,
949                                     TW_SECTOR_SIZE*TW_Q_LENGTH,
950                                     tw_dev->generic_buffer_virt[0],
951                                     tw_dev->generic_buffer_phys[0]);
952
953         if (tw_dev->sense_buffer_virt[0])
954                 pci_free_consistent(tw_dev->tw_pci_dev,
955                                     sizeof(TW_Command_Apache_Header)*
956                                     TW_Q_LENGTH,
957                                     tw_dev->sense_buffer_virt[0],
958                                     tw_dev->sense_buffer_phys[0]);
959
960         kfree(tw_dev->event_queue[0]);
961 } /* End twl_free_device_extension() */
962
963 /* This function will get parameter table entries from the firmware */
964 static void *twl_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
965 {
966         TW_Command_Full *full_command_packet;
967         TW_Command *command_packet;
968         TW_Param_Apache *param;
969         void *retval = NULL;
970
971         /* Setup the command packet */
972         full_command_packet = tw_dev->command_packet_virt[request_id];
973         memset(full_command_packet, 0, sizeof(TW_Command_Full));
974         command_packet = &full_command_packet->command.oldcommand;
975
976         command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
977         command_packet->size              = TW_COMMAND_SIZE;
978         command_packet->request_id        = request_id;
979         command_packet->byte6_offset.block_count = cpu_to_le16(1);
980
981         /* Now setup the param */
982         param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
983         memset(param, 0, TW_SECTOR_SIZE);
984         param->table_id = cpu_to_le16(table_id | 0x8000);
985         param->parameter_id = cpu_to_le16(parameter_id);
986         param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
987
988         command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
989         command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE);
990
991         /* Post the command packet to the board */
992         twl_post_command_packet(tw_dev, request_id);
993
994         /* Poll for completion */
995         if (twl_poll_response(tw_dev, request_id, 30))
996                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "No valid response during get param")
997         else
998                 retval = (void *)&(param->data[0]);
999
1000         tw_dev->posted_request_count--;
1001         tw_dev->state[request_id] = TW_S_INITIAL;
1002
1003         return retval;
1004 } /* End twl_get_param() */
1005
1006 /* This function will send an initconnection command to controller */
1007 static int twl_initconnection(TW_Device_Extension *tw_dev, int message_credits,
1008                               u32 set_features, unsigned short current_fw_srl, 
1009                               unsigned short current_fw_arch_id, 
1010                               unsigned short current_fw_branch, 
1011                               unsigned short current_fw_build, 
1012                               unsigned short *fw_on_ctlr_srl, 
1013                               unsigned short *fw_on_ctlr_arch_id, 
1014                               unsigned short *fw_on_ctlr_branch, 
1015                               unsigned short *fw_on_ctlr_build, 
1016                               u32 *init_connect_result)
1017 {
1018         TW_Command_Full *full_command_packet;
1019         TW_Initconnect *tw_initconnect;
1020         int request_id = 0, retval = 1;
1021
1022         /* Initialize InitConnection command packet */
1023         full_command_packet = tw_dev->command_packet_virt[request_id];
1024         memset(full_command_packet, 0, sizeof(TW_Command_Full));
1025         full_command_packet->header.header_desc.size_header = 128;
1026         
1027         tw_initconnect = (TW_Initconnect *)&full_command_packet->command.oldcommand;
1028         tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
1029         tw_initconnect->request_id = request_id;
1030         tw_initconnect->message_credits = cpu_to_le16(message_credits);
1031         tw_initconnect->features = set_features;
1032
1033         /* Turn on 64-bit sgl support if we need to */
1034         tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
1035
1036         tw_initconnect->features = cpu_to_le32(tw_initconnect->features);
1037
1038         if (set_features & TW_EXTENDED_INIT_CONNECT) {
1039                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
1040                 tw_initconnect->fw_srl = cpu_to_le16(current_fw_srl);
1041                 tw_initconnect->fw_arch_id = cpu_to_le16(current_fw_arch_id);
1042                 tw_initconnect->fw_branch = cpu_to_le16(current_fw_branch);
1043                 tw_initconnect->fw_build = cpu_to_le16(current_fw_build);
1044         } else 
1045                 tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE;
1046
1047         /* Send command packet to the board */
1048         twl_post_command_packet(tw_dev, request_id);
1049
1050         /* Poll for completion */
1051         if (twl_poll_response(tw_dev, request_id, 30)) {
1052                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x8, "No valid response during init connection");
1053         } else {
1054                 if (set_features & TW_EXTENDED_INIT_CONNECT) {
1055                         *fw_on_ctlr_srl = le16_to_cpu(tw_initconnect->fw_srl);
1056                         *fw_on_ctlr_arch_id = le16_to_cpu(tw_initconnect->fw_arch_id);
1057                         *fw_on_ctlr_branch = le16_to_cpu(tw_initconnect->fw_branch);
1058                         *fw_on_ctlr_build = le16_to_cpu(tw_initconnect->fw_build);
1059                         *init_connect_result = le32_to_cpu(tw_initconnect->result);
1060                 }
1061                 retval = 0;
1062         }
1063
1064         tw_dev->posted_request_count--;
1065         tw_dev->state[request_id] = TW_S_INITIAL;
1066
1067         return retval;
1068 } /* End twl_initconnection() */
1069
1070 /* This function will initialize the fields of a device extension */
1071 static int twl_initialize_device_extension(TW_Device_Extension *tw_dev)
1072 {
1073         int i, retval = 1;
1074
1075         /* Initialize command packet buffers */
1076         if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Full), 0)) {
1077                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x9, "Command packet memory allocation failed");
1078                 goto out;
1079         }
1080
1081         /* Initialize generic buffer */
1082         if (twl_allocate_memory(tw_dev, TW_SECTOR_SIZE, 1)) {
1083                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xa, "Generic memory allocation failed");
1084                 goto out;
1085         }
1086
1087         /* Allocate sense buffers */
1088         if (twl_allocate_memory(tw_dev, sizeof(TW_Command_Apache_Header), 2)) {
1089                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xb, "Sense buffer allocation failed");
1090                 goto out;
1091         }
1092
1093         /* Allocate event info space */
1094         tw_dev->event_queue[0] = kcalloc(TW_Q_LENGTH, sizeof(TW_Event), GFP_KERNEL);
1095         if (!tw_dev->event_queue[0]) {
1096                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xc, "Event info memory allocation failed");
1097                 goto out;
1098         }
1099
1100         for (i = 0; i < TW_Q_LENGTH; i++) {
1101                 tw_dev->event_queue[i] = (TW_Event *)((unsigned char *)tw_dev->event_queue[0] + (i * sizeof(TW_Event)));
1102                 tw_dev->free_queue[i] = i;
1103                 tw_dev->state[i] = TW_S_INITIAL;
1104         }
1105
1106         tw_dev->free_head = TW_Q_START;
1107         tw_dev->free_tail = TW_Q_START;
1108         tw_dev->error_sequence_id = 1;
1109         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1110
1111         mutex_init(&tw_dev->ioctl_lock);
1112         init_waitqueue_head(&tw_dev->ioctl_wqueue);
1113
1114         retval = 0;
1115 out:
1116         return retval;
1117 } /* End twl_initialize_device_extension() */
1118
1119 /* This function will perform a pci-dma unmap */
1120 static void twl_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)
1121 {
1122         struct scsi_cmnd *cmd = tw_dev->srb[request_id];
1123
1124         if (cmd->SCp.phase == TW_PHASE_SGLIST)
1125                 scsi_dma_unmap(cmd);
1126 } /* End twl_unmap_scsi_data() */
1127
1128 /* This function will handle attention interrupts */
1129 static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev)
1130 {
1131         int retval = 1;
1132         u32 request_id, doorbell;
1133
1134         /* Read doorbell status */
1135         doorbell = readl(TWL_HOBDB_REG_ADDR(tw_dev));
1136
1137         /* Check for controller errors */
1138         if (doorbell & TWL_DOORBELL_CONTROLLER_ERROR) {
1139                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xd, "Microcontroller Error: clearing");
1140                 goto out;
1141         }
1142
1143         /* Check if we need to perform an AEN drain */
1144         if (doorbell & TWL_DOORBELL_ATTENTION_INTERRUPT) {
1145                 if (!(test_and_set_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags))) {
1146                         twl_get_request_id(tw_dev, &request_id);
1147                         if (twl_aen_read_queue(tw_dev, request_id)) {
1148                                 tw_dev->state[request_id] = TW_S_COMPLETED;
1149                                 twl_free_request_id(tw_dev, request_id);
1150                                 clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
1151                         }
1152                 }
1153         }
1154
1155         retval = 0;
1156 out:
1157         /* Clear doorbell interrupt */
1158         TWL_CLEAR_DB_INTERRUPT(tw_dev);
1159
1160         /* Make sure the clear was flushed by reading it back */
1161         readl(TWL_HOBDBC_REG_ADDR(tw_dev));
1162
1163         return retval;
1164 } /* End twl_handle_attention_interrupt() */
1165
1166 /* Interrupt service routine */
1167 static irqreturn_t twl_interrupt(int irq, void *dev_instance)
1168 {
1169         TW_Device_Extension *tw_dev = (TW_Device_Extension *)dev_instance;
1170         int i, handled = 0, error = 0;
1171         dma_addr_t mfa = 0;
1172         u32 reg, regl, regh, response, request_id = 0;
1173         struct scsi_cmnd *cmd;
1174         TW_Command_Full *full_command_packet;
1175
1176         spin_lock(tw_dev->host->host_lock);
1177
1178         /* Read host interrupt status */
1179         reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
1180
1181         /* Check if this is our interrupt, otherwise bail */
1182         if (!(reg & TWL_HISTATUS_VALID_INTERRUPT))
1183                 goto twl_interrupt_bail;
1184
1185         handled = 1;
1186
1187         /* If we are resetting, bail */
1188         if (test_bit(TW_IN_RESET, &tw_dev->flags))
1189                 goto twl_interrupt_bail;
1190
1191         /* Attention interrupt */
1192         if (reg & TWL_HISTATUS_ATTENTION_INTERRUPT) {
1193                 if (twl_handle_attention_interrupt(tw_dev)) {
1194                         TWL_MASK_INTERRUPTS(tw_dev);
1195                         goto twl_interrupt_bail;
1196                 }
1197         }
1198
1199         /* Response interrupt */
1200         while (reg & TWL_HISTATUS_RESPONSE_INTERRUPT) {
1201                 if (sizeof(dma_addr_t) > 4) {
1202                         regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
1203                         regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
1204                         mfa = ((u64)regh << 32) | regl;
1205                 } else
1206                         mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
1207
1208                 error = 0;
1209                 response = (u32)mfa;
1210
1211                 /* Check for command packet error */
1212                 if (!TW_NOTMFA_OUT(response)) {
1213                         for (i=0;i<TW_Q_LENGTH;i++) {
1214                                 if (tw_dev->sense_buffer_phys[i] == mfa) {
1215                                         request_id = le16_to_cpu(tw_dev->sense_buffer_virt[i]->header_desc.request_id);
1216                                         if (tw_dev->srb[request_id] != NULL)
1217                                                 error = twl_fill_sense(tw_dev, i, request_id, 1, 1);
1218                                         else {
1219                                                 /* Skip ioctl error prints */
1220                                                 if (request_id != tw_dev->chrdev_request_id)
1221                                                         error = twl_fill_sense(tw_dev, i, request_id, 0, 1);
1222                                                 else
1223                                                         memcpy(tw_dev->command_packet_virt[request_id], tw_dev->sense_buffer_virt[i], sizeof(TW_Command_Apache_Header));
1224                                         }
1225
1226                                         /* Now re-post the sense buffer */
1227                                         writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev));
1228                                         writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
1229                                         break;
1230                                 }
1231                         }
1232                 } else
1233                         request_id = TW_RESID_OUT(response);
1234
1235                 full_command_packet = tw_dev->command_packet_virt[request_id];
1236
1237                 /* Check for correct state */
1238                 if (tw_dev->state[request_id] != TW_S_POSTED) {
1239                         if (tw_dev->srb[request_id] != NULL) {
1240                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0xe, "Received a request id that wasn't posted");
1241                                 TWL_MASK_INTERRUPTS(tw_dev);
1242                                 goto twl_interrupt_bail;
1243                         }
1244                 }
1245
1246                 /* Check for internal command completion */
1247                 if (tw_dev->srb[request_id] == NULL) {
1248                         if (request_id != tw_dev->chrdev_request_id) {
1249                                 if (twl_aen_complete(tw_dev, request_id))
1250                                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0xf, "Error completing AEN during attention interrupt");
1251                         } else {
1252                                 tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1253                                 wake_up(&tw_dev->ioctl_wqueue);
1254                         }
1255                 } else {
1256                         cmd = tw_dev->srb[request_id];
1257
1258                         if (!error)
1259                                 cmd->result = (DID_OK << 16);
1260                         
1261                         /* Report residual bytes for single sgl */
1262                         if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
1263                                 if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id]))
1264                                         scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length);
1265                         }
1266
1267                         /* Now complete the io */
1268                         tw_dev->state[request_id] = TW_S_COMPLETED;
1269                         twl_free_request_id(tw_dev, request_id);
1270                         tw_dev->posted_request_count--;
1271                         tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);
1272                         twl_unmap_scsi_data(tw_dev, request_id);
1273                 }
1274
1275                 /* Check for another response interrupt */
1276                 reg = readl(TWL_HISTAT_REG_ADDR(tw_dev));
1277         }
1278
1279 twl_interrupt_bail:
1280         spin_unlock(tw_dev->host->host_lock);
1281         return IRQ_RETVAL(handled);
1282 } /* End twl_interrupt() */
1283
1284 /* This function will poll for a register change */
1285 static int twl_poll_register(TW_Device_Extension *tw_dev, void *reg, u32 value, u32 result, int seconds)
1286 {
1287         unsigned long before;
1288         int retval = 1;
1289         u32 reg_value;
1290
1291         reg_value = readl(reg);
1292         before = jiffies;
1293
1294         while ((reg_value & value) != result) {
1295                 reg_value = readl(reg);
1296                 if (time_after(jiffies, before + HZ * seconds))
1297                         goto out;
1298                 msleep(50);
1299         }
1300         retval = 0;
1301 out:
1302         return retval;
1303 } /* End twl_poll_register() */
1304
1305 /* This function will reset a controller */
1306 static int twl_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset)
1307 {
1308         int retval = 1;
1309         int i = 0;
1310         u32 status = 0;
1311         unsigned short fw_on_ctlr_srl = 0, fw_on_ctlr_arch_id = 0;
1312         unsigned short fw_on_ctlr_branch = 0, fw_on_ctlr_build = 0;
1313         u32 init_connect_result = 0;
1314         int tries = 0;
1315         int do_soft_reset = soft_reset;
1316
1317         while (tries < TW_MAX_RESET_TRIES) {
1318                 /* Do a soft reset if one is needed */
1319                 if (do_soft_reset) {
1320                         TWL_SOFT_RESET(tw_dev);
1321
1322                         /* Make sure controller is in a good state */
1323                         if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, 0x0, 30)) {
1324                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x10, "Controller never went non-ready during reset sequence");
1325                                 tries++;
1326                                 continue;
1327                         }
1328                         if (twl_poll_register(tw_dev, TWL_SCRPD3_REG_ADDR(tw_dev), TWL_CONTROLLER_READY, TWL_CONTROLLER_READY, 60)) {
1329                                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x11, "Controller not ready during reset sequence");
1330                                 tries++;
1331                                 continue;
1332                         }
1333                 }
1334
1335                 /* Initconnect */
1336                 if (twl_initconnection(tw_dev, TW_INIT_MESSAGE_CREDITS,
1337                                        TW_EXTENDED_INIT_CONNECT, TW_CURRENT_DRIVER_SRL,
1338                                        TW_9750_ARCH_ID, TW_CURRENT_DRIVER_BRANCH,
1339                                        TW_CURRENT_DRIVER_BUILD, &fw_on_ctlr_srl,
1340                                        &fw_on_ctlr_arch_id, &fw_on_ctlr_branch,
1341                                        &fw_on_ctlr_build, &init_connect_result)) {
1342                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x12, "Initconnection failed while checking SRL");
1343                         do_soft_reset = 1;
1344                         tries++;
1345                         continue;
1346                 }
1347
1348                 /* Load sense buffers */
1349                 while (i < TW_Q_LENGTH) {
1350                         writel((u32)((u64)tw_dev->sense_buffer_phys[i] >> 32), TWL_HOBQPH_REG_ADDR(tw_dev));
1351                         writel((u32)tw_dev->sense_buffer_phys[i], TWL_HOBQPL_REG_ADDR(tw_dev));
1352
1353                         /* Check status for over-run after each write */
1354                         status = readl(TWL_STATUS_REG_ADDR(tw_dev));
1355                         if (!(status & TWL_STATUS_OVERRUN_SUBMIT))
1356                             i++;
1357                 }
1358
1359                 /* Now check status */
1360                 status = readl(TWL_STATUS_REG_ADDR(tw_dev));
1361                 if (status) {
1362                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x13, "Bad controller status after loading sense buffers");
1363                         do_soft_reset = 1;
1364                         tries++;
1365                         continue;
1366                 }
1367
1368                 /* Drain the AEN queue */
1369                 if (twl_aen_drain_queue(tw_dev, soft_reset)) {
1370                         TW_PRINTK(tw_dev->host, TW_DRIVER, 0x14, "AEN drain failed during reset sequence");
1371                         do_soft_reset = 1;
1372                         tries++;
1373                         continue;
1374                 }
1375
1376                 /* Load rest of compatibility struct */
1377                 strncpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION, strlen(TW_DRIVER_VERSION));
1378                 tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL;
1379                 tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH;
1380                 tw_dev->tw_compat_info.driver_build_high = TW_CURRENT_DRIVER_BUILD;
1381                 tw_dev->tw_compat_info.driver_srl_low = TW_BASE_FW_SRL;
1382                 tw_dev->tw_compat_info.driver_branch_low = TW_BASE_FW_BRANCH;
1383                 tw_dev->tw_compat_info.driver_build_low = TW_BASE_FW_BUILD;
1384                 tw_dev->tw_compat_info.fw_on_ctlr_srl = fw_on_ctlr_srl;
1385                 tw_dev->tw_compat_info.fw_on_ctlr_branch = fw_on_ctlr_branch;
1386                 tw_dev->tw_compat_info.fw_on_ctlr_build = fw_on_ctlr_build;
1387
1388                 /* If we got here, controller is in a good state */
1389                 retval = 0;
1390                 goto out;
1391         }
1392 out:
1393         return retval;
1394 } /* End twl_reset_sequence() */
1395
1396 /* This function will reset a device extension */
1397 static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset)
1398 {
1399         int i = 0, retval = 1;
1400         unsigned long flags = 0;
1401
1402         /* Block SCSI requests while we are resetting */
1403         if (ioctl_reset)
1404                 scsi_block_requests(tw_dev->host);
1405
1406         set_bit(TW_IN_RESET, &tw_dev->flags);
1407         TWL_MASK_INTERRUPTS(tw_dev);
1408         TWL_CLEAR_DB_INTERRUPT(tw_dev);
1409
1410         spin_lock_irqsave(tw_dev->host->host_lock, flags);
1411
1412         /* Abort all requests that are in progress */
1413         for (i = 0; i < TW_Q_LENGTH; i++) {
1414                 if ((tw_dev->state[i] != TW_S_FINISHED) &&
1415                     (tw_dev->state[i] != TW_S_INITIAL) &&
1416                     (tw_dev->state[i] != TW_S_COMPLETED)) {
1417                         if (tw_dev->srb[i]) {
1418                                 tw_dev->srb[i]->result = (DID_RESET << 16);
1419                                 tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);
1420                                 twl_unmap_scsi_data(tw_dev, i);
1421                         }
1422                 }
1423         }
1424
1425         /* Reset queues and counts */
1426         for (i = 0; i < TW_Q_LENGTH; i++) {
1427                 tw_dev->free_queue[i] = i;
1428                 tw_dev->state[i] = TW_S_INITIAL;
1429         }
1430         tw_dev->free_head = TW_Q_START;
1431         tw_dev->free_tail = TW_Q_START;
1432         tw_dev->posted_request_count = 0;
1433
1434         spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
1435
1436         if (twl_reset_sequence(tw_dev, 1))
1437                 goto out;
1438
1439         TWL_UNMASK_INTERRUPTS(tw_dev);
1440
1441         clear_bit(TW_IN_RESET, &tw_dev->flags);
1442         tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
1443
1444         retval = 0;
1445 out:
1446         if (ioctl_reset)
1447                 scsi_unblock_requests(tw_dev->host);
1448         return retval;
1449 } /* End twl_reset_device_extension() */
1450
1451 /* This funciton returns unit geometry in cylinders/heads/sectors */
1452 static int twl_scsi_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[])
1453 {
1454         int heads, sectors;
1455         TW_Device_Extension *tw_dev;
1456
1457         tw_dev = (TW_Device_Extension *)sdev->host->hostdata;
1458
1459         if (capacity >= 0x200000) {
1460                 heads = 255;
1461                 sectors = 63;
1462         } else {
1463                 heads = 64;
1464                 sectors = 32;
1465         }
1466
1467         geom[0] = heads;
1468         geom[1] = sectors;
1469         geom[2] = sector_div(capacity, heads * sectors); /* cylinders */
1470
1471         return 0;
1472 } /* End twl_scsi_biosparam() */
1473
1474 /* This is the new scsi eh reset function */
1475 static int twl_scsi_eh_reset(struct scsi_cmnd *SCpnt)
1476 {
1477         TW_Device_Extension *tw_dev = NULL;
1478         int retval = FAILED;
1479
1480         tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1481
1482         tw_dev->num_resets++;
1483
1484         sdev_printk(KERN_WARNING, SCpnt->device,
1485                 "WARNING: (0x%02X:0x%04X): Command (0x%x) timed out, resetting card.\n",
1486                 TW_DRIVER, 0x2c, SCpnt->cmnd[0]);
1487
1488         /* Make sure we are not issuing an ioctl or resetting from ioctl */
1489         mutex_lock(&tw_dev->ioctl_lock);
1490
1491         /* Now reset the card and some of the device extension data */
1492         if (twl_reset_device_extension(tw_dev, 0)) {
1493                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x15, "Controller reset failed during scsi host reset");
1494                 goto out;
1495         }
1496
1497         retval = SUCCESS;
1498 out:
1499         mutex_unlock(&tw_dev->ioctl_lock);
1500         return retval;
1501 } /* End twl_scsi_eh_reset() */
1502
1503 /* This is the main scsi queue function to handle scsi opcodes */
1504 static int twl_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
1505 {
1506         int request_id, retval;
1507         TW_Device_Extension *tw_dev = (TW_Device_Extension *)SCpnt->device->host->hostdata;
1508
1509         /* If we are resetting due to timed out ioctl, report as busy */
1510         if (test_bit(TW_IN_RESET, &tw_dev->flags)) {
1511                 retval = SCSI_MLQUEUE_HOST_BUSY;
1512                 goto out;
1513         }
1514
1515         /* Save done function into scsi_cmnd struct */
1516         SCpnt->scsi_done = done;
1517                 
1518         /* Get a free request id */
1519         twl_get_request_id(tw_dev, &request_id);
1520
1521         /* Save the scsi command for use by the ISR */
1522         tw_dev->srb[request_id] = SCpnt;
1523
1524         /* Initialize phase to zero */
1525         SCpnt->SCp.phase = TW_PHASE_INITIAL;
1526
1527         retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);
1528         if (retval) {
1529                 tw_dev->state[request_id] = TW_S_COMPLETED;
1530                 twl_free_request_id(tw_dev, request_id);
1531                 SCpnt->result = (DID_ERROR << 16);
1532                 done(SCpnt);
1533                 retval = 0;
1534         }
1535 out:
1536         return retval;
1537 } /* End twl_scsi_queue() */
1538
1539 static DEF_SCSI_QCMD(twl_scsi_queue)
1540
1541 /* This function tells the controller to shut down */
1542 static void __twl_shutdown(TW_Device_Extension *tw_dev)
1543 {
1544         /* Disable interrupts */
1545         TWL_MASK_INTERRUPTS(tw_dev);
1546
1547         /* Free up the IRQ */
1548         free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1549
1550         printk(KERN_WARNING "3w-sas: Shutting down host %d.\n", tw_dev->host->host_no);
1551
1552         /* Tell the card we are shutting down */
1553         if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1554                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x16, "Connection shutdown failed");
1555         } else {
1556                 printk(KERN_WARNING "3w-sas: Shutdown complete.\n");
1557         }
1558
1559         /* Clear doorbell interrupt just before exit */
1560         TWL_CLEAR_DB_INTERRUPT(tw_dev);
1561 } /* End __twl_shutdown() */
1562
1563 /* Wrapper for __twl_shutdown */
1564 static void twl_shutdown(struct pci_dev *pdev)
1565 {
1566         struct Scsi_Host *host = pci_get_drvdata(pdev);
1567         TW_Device_Extension *tw_dev;
1568
1569         if (!host)
1570                 return;
1571
1572         tw_dev = (TW_Device_Extension *)host->hostdata;
1573
1574         if (tw_dev->online) 
1575                 __twl_shutdown(tw_dev);
1576 } /* End twl_shutdown() */
1577
1578 /* This function configures unit settings when a unit is coming on-line */
1579 static int twl_slave_configure(struct scsi_device *sdev)
1580 {
1581         /* Force 60 second timeout */
1582         blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
1583
1584         return 0;
1585 } /* End twl_slave_configure() */
1586
1587 /* scsi_host_template initializer */
1588 static struct scsi_host_template driver_template = {
1589         .module                 = THIS_MODULE,
1590         .name                   = "3w-sas",
1591         .queuecommand           = twl_scsi_queue,
1592         .eh_host_reset_handler  = twl_scsi_eh_reset,
1593         .bios_param             = twl_scsi_biosparam,
1594         .change_queue_depth     = twl_change_queue_depth,
1595         .can_queue              = TW_Q_LENGTH-2,
1596         .slave_configure        = twl_slave_configure,
1597         .this_id                = -1,
1598         .sg_tablesize           = TW_LIBERATOR_MAX_SGL_LENGTH,
1599         .max_sectors            = TW_MAX_SECTORS,
1600         .cmd_per_lun            = TW_MAX_CMDS_PER_LUN,
1601         .use_clustering         = ENABLE_CLUSTERING,
1602         .shost_attrs            = twl_host_attrs,
1603         .emulated               = 1
1604 };
1605
1606 /* This function will probe and initialize a card */
1607 static int __devinit twl_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
1608 {
1609         struct Scsi_Host *host = NULL;
1610         TW_Device_Extension *tw_dev;
1611         int retval = -ENODEV;
1612         int *ptr_phycount, phycount=0;
1613
1614         retval = pci_enable_device(pdev);
1615         if (retval) {
1616                 TW_PRINTK(host, TW_DRIVER, 0x17, "Failed to enable pci device");
1617                 goto out_disable_device;
1618         }
1619
1620         pci_set_master(pdev);
1621         pci_try_set_mwi(pdev);
1622
1623         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
1624             || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
1625                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
1626                     || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
1627                         TW_PRINTK(host, TW_DRIVER, 0x18, "Failed to set dma mask");
1628                         retval = -ENODEV;
1629                         goto out_disable_device;
1630                 }
1631
1632         host = scsi_host_alloc(&driver_template, sizeof(TW_Device_Extension));
1633         if (!host) {
1634                 TW_PRINTK(host, TW_DRIVER, 0x19, "Failed to allocate memory for device extension");
1635                 retval = -ENOMEM;
1636                 goto out_disable_device;
1637         }
1638         tw_dev = shost_priv(host);
1639
1640         /* Save values to device extension */
1641         tw_dev->host = host;
1642         tw_dev->tw_pci_dev = pdev;
1643
1644         if (twl_initialize_device_extension(tw_dev)) {
1645                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1a, "Failed to initialize device extension");
1646                 goto out_free_device_extension;
1647         }
1648
1649         /* Request IO regions */
1650         retval = pci_request_regions(pdev, "3w-sas");
1651         if (retval) {
1652                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1b, "Failed to get mem region");
1653                 goto out_free_device_extension;
1654         }
1655
1656         /* Save base address, use region 1 */
1657         tw_dev->base_addr = pci_iomap(pdev, 1, 0);
1658         if (!tw_dev->base_addr) {
1659                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to ioremap");
1660                 goto out_release_mem_region;
1661         }
1662
1663         /* Disable interrupts on the card */
1664         TWL_MASK_INTERRUPTS(tw_dev);
1665
1666         /* Initialize the card */
1667         if (twl_reset_sequence(tw_dev, 0)) {
1668                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1d, "Controller reset failed during probe");
1669                 goto out_iounmap;
1670         }
1671
1672         /* Set host specific parameters */
1673         host->max_id = TW_MAX_UNITS;
1674         host->max_cmd_len = TW_MAX_CDB_LEN;
1675         host->max_lun = TW_MAX_LUNS;
1676         host->max_channel = 0;
1677
1678         /* Register the card with the kernel SCSI layer */
1679         retval = scsi_add_host(host, &pdev->dev);
1680         if (retval) {
1681                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1e, "scsi add host failed");
1682                 goto out_iounmap;
1683         }
1684
1685         pci_set_drvdata(pdev, host);
1686
1687         printk(KERN_WARNING "3w-sas: scsi%d: Found an LSI 3ware %s Controller at 0x%llx, IRQ: %d.\n",
1688                host->host_no,
1689                (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
1690                                      TW_PARAM_MODEL, TW_PARAM_MODEL_LENGTH),
1691                (u64)pci_resource_start(pdev, 1), pdev->irq);
1692
1693         ptr_phycount = twl_get_param(tw_dev, 2, TW_PARAM_PHY_SUMMARY_TABLE,
1694                                      TW_PARAM_PHYCOUNT, TW_PARAM_PHYCOUNT_LENGTH);
1695         if (ptr_phycount)
1696                 phycount = le32_to_cpu(*(int *)ptr_phycount);
1697
1698         printk(KERN_WARNING "3w-sas: scsi%d: Firmware %s, BIOS %s, Phys: %d.\n",
1699                host->host_no,
1700                (char *)twl_get_param(tw_dev, 1, TW_VERSION_TABLE,
1701                                      TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
1702                (char *)twl_get_param(tw_dev, 2, TW_VERSION_TABLE,
1703                                      TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
1704                phycount);
1705
1706         /* Try to enable MSI */
1707         if (use_msi && !pci_enable_msi(pdev))
1708                 set_bit(TW_USING_MSI, &tw_dev->flags);
1709
1710         /* Now setup the interrupt handler */
1711         retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
1712         if (retval) {
1713                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1f, "Error requesting IRQ");
1714                 goto out_remove_host;
1715         }
1716
1717         twl_device_extension_list[twl_device_extension_count] = tw_dev;
1718         twl_device_extension_count++;
1719
1720         /* Re-enable interrupts on the card */
1721         TWL_UNMASK_INTERRUPTS(tw_dev);
1722         
1723         /* Finally, scan the host */
1724         scsi_scan_host(host);
1725
1726         /* Add sysfs binary files */
1727         if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr))
1728                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x20, "Failed to create sysfs binary file: 3ware_aen_read");
1729         if (sysfs_create_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr))
1730                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x21, "Failed to create sysfs binary file: 3ware_compat_info");
1731
1732         if (twl_major == -1) {
1733                 if ((twl_major = register_chrdev (0, "twl", &twl_fops)) < 0)
1734                         TW_PRINTK(host, TW_DRIVER, 0x22, "Failed to register character device");
1735         }
1736         tw_dev->online = 1;
1737         return 0;
1738
1739 out_remove_host:
1740         if (test_bit(TW_USING_MSI, &tw_dev->flags))
1741                 pci_disable_msi(pdev);
1742         scsi_remove_host(host);
1743 out_iounmap:
1744         iounmap(tw_dev->base_addr);
1745 out_release_mem_region:
1746         pci_release_regions(pdev);
1747 out_free_device_extension:
1748         twl_free_device_extension(tw_dev);
1749         scsi_host_put(host);
1750 out_disable_device:
1751         pci_disable_device(pdev);
1752
1753         return retval;
1754 } /* End twl_probe() */
1755
1756 /* This function is called to remove a device */
1757 static void twl_remove(struct pci_dev *pdev)
1758 {
1759         struct Scsi_Host *host = pci_get_drvdata(pdev);
1760         TW_Device_Extension *tw_dev;
1761
1762         if (!host)
1763                 return;
1764
1765         tw_dev = (TW_Device_Extension *)host->hostdata;
1766
1767         if (!tw_dev->online)
1768                 return;
1769
1770         /* Remove sysfs binary files */
1771         sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_aen_read_attr);
1772         sysfs_remove_bin_file(&host->shost_dev.kobj, &twl_sysfs_compat_info_attr);
1773
1774         scsi_remove_host(tw_dev->host);
1775
1776         /* Unregister character device */
1777         if (twl_major >= 0) {
1778                 unregister_chrdev(twl_major, "twl");
1779                 twl_major = -1;
1780         }
1781
1782         /* Shutdown the card */
1783         __twl_shutdown(tw_dev);
1784
1785         /* Disable MSI if enabled */
1786         if (test_bit(TW_USING_MSI, &tw_dev->flags))
1787                 pci_disable_msi(pdev);
1788
1789         /* Free IO remapping */
1790         iounmap(tw_dev->base_addr);
1791
1792         /* Free up the mem region */
1793         pci_release_regions(pdev);
1794
1795         /* Free up device extension resources */
1796         twl_free_device_extension(tw_dev);
1797
1798         scsi_host_put(tw_dev->host);
1799         pci_disable_device(pdev);
1800         twl_device_extension_count--;
1801 } /* End twl_remove() */
1802
1803 #ifdef CONFIG_PM
1804 /* This function is called on PCI suspend */
1805 static int twl_suspend(struct pci_dev *pdev, pm_message_t state)
1806 {
1807         struct Scsi_Host *host = pci_get_drvdata(pdev);
1808         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1809
1810         printk(KERN_WARNING "3w-sas: Suspending host %d.\n", tw_dev->host->host_no);
1811         /* Disable interrupts */
1812         TWL_MASK_INTERRUPTS(tw_dev);
1813
1814         free_irq(tw_dev->tw_pci_dev->irq, tw_dev);
1815
1816         /* Tell the card we are shutting down */
1817         if (twl_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {
1818                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x23, "Connection shutdown failed during suspend");
1819         } else {
1820                 printk(KERN_WARNING "3w-sas: Suspend complete.\n");
1821         }
1822
1823         /* Clear doorbell interrupt */
1824         TWL_CLEAR_DB_INTERRUPT(tw_dev);
1825
1826         pci_save_state(pdev);
1827         pci_disable_device(pdev);
1828         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1829
1830         return 0;
1831 } /* End twl_suspend() */
1832
1833 /* This function is called on PCI resume */
1834 static int twl_resume(struct pci_dev *pdev)
1835 {
1836         int retval = 0;
1837         struct Scsi_Host *host = pci_get_drvdata(pdev);
1838         TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
1839
1840         printk(KERN_WARNING "3w-sas: Resuming host %d.\n", tw_dev->host->host_no);
1841         pci_set_power_state(pdev, PCI_D0);
1842         pci_enable_wake(pdev, PCI_D0, 0);
1843         pci_restore_state(pdev);
1844
1845         retval = pci_enable_device(pdev);
1846         if (retval) {
1847                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x24, "Enable device failed during resume");
1848                 return retval;
1849         }
1850
1851         pci_set_master(pdev);
1852         pci_try_set_mwi(pdev);
1853
1854         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
1855             || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
1856                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
1857                     || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
1858                         TW_PRINTK(host, TW_DRIVER, 0x25, "Failed to set dma mask during resume");
1859                         retval = -ENODEV;
1860                         goto out_disable_device;
1861                 }
1862
1863         /* Initialize the card */
1864         if (twl_reset_sequence(tw_dev, 0)) {
1865                 retval = -ENODEV;
1866                 goto out_disable_device;
1867         }
1868
1869         /* Now setup the interrupt handler */
1870         retval = request_irq(pdev->irq, twl_interrupt, IRQF_SHARED, "3w-sas", tw_dev);
1871         if (retval) {
1872                 TW_PRINTK(tw_dev->host, TW_DRIVER, 0x26, "Error requesting IRQ during resume");
1873                 retval = -ENODEV;
1874                 goto out_disable_device;
1875         }
1876
1877         /* Now enable MSI if enabled */
1878         if (test_bit(TW_USING_MSI, &tw_dev->flags))
1879                 pci_enable_msi(pdev);
1880
1881         /* Re-enable interrupts on the card */
1882         TWL_UNMASK_INTERRUPTS(tw_dev);
1883
1884         printk(KERN_WARNING "3w-sas: Resume complete.\n");
1885         return 0;
1886
1887 out_disable_device:
1888         scsi_remove_host(host);
1889         pci_disable_device(pdev);
1890
1891         return retval;
1892 } /* End twl_resume() */
1893 #endif
1894
1895 /* PCI Devices supported by this driver */
1896 static struct pci_device_id twl_pci_tbl[] __devinitdata = {
1897         { PCI_VDEVICE(3WARE, PCI_DEVICE_ID_3WARE_9750) },
1898         { }
1899 };
1900 MODULE_DEVICE_TABLE(pci, twl_pci_tbl);
1901
1902 /* pci_driver initializer */
1903 static struct pci_driver twl_driver = {
1904         .name           = "3w-sas",
1905         .id_table       = twl_pci_tbl,
1906         .probe          = twl_probe,
1907         .remove         = twl_remove,
1908 #ifdef CONFIG_PM
1909         .suspend        = twl_suspend,
1910         .resume         = twl_resume,
1911 #endif
1912         .shutdown       = twl_shutdown
1913 };
1914
1915 /* This function is called on driver initialization */
1916 static int __init twl_init(void)
1917 {
1918         printk(KERN_INFO "LSI 3ware SAS/SATA-RAID Controller device driver for Linux v%s.\n", TW_DRIVER_VERSION);
1919
1920         return pci_register_driver(&twl_driver);
1921 } /* End twl_init() */
1922
1923 /* This function is called on driver exit */
1924 static void __exit twl_exit(void)
1925 {
1926         pci_unregister_driver(&twl_driver);
1927 } /* End twl_exit() */
1928
1929 module_init(twl_init);
1930 module_exit(twl_exit);
1931