[SCSI] stex: stex_internal_copy should be called with sg_count in struct st_ccb
[sfrench/cifs-2.6.git] / drivers / scsi / stex.c
1 /*
2  * SuperTrak EX Series Storage Controller driver for Linux
3  *
4  *      Copyright (C) 2005, 2006 Promise Technology Inc.
5  *
6  *      This program is free software; you can redistribute it and/or
7  *      modify it under the terms of the GNU General Public License
8  *      as published by the Free Software Foundation; either version
9  *      2 of the License, or (at your option) any later version.
10  *
11  *      Written By:
12  *              Ed Lin <promise_linux@promise.com>
13  *
14  */
15
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/delay.h>
20 #include <linux/time.h>
21 #include <linux/pci.h>
22 #include <linux/blkdev.h>
23 #include <linux/interrupt.h>
24 #include <linux/types.h>
25 #include <linux/module.h>
26 #include <linux/spinlock.h>
27 #include <asm/io.h>
28 #include <asm/irq.h>
29 #include <asm/byteorder.h>
30 #include <scsi/scsi.h>
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_cmnd.h>
33 #include <scsi/scsi_host.h>
34 #include <scsi/scsi_tcq.h>
35 #include <scsi/scsi_dbg.h>
36
37 #define DRV_NAME "stex"
38 #define ST_DRIVER_VERSION "3.6.0000.1"
39 #define ST_VER_MAJOR            3
40 #define ST_VER_MINOR            6
41 #define ST_OEM                  0
42 #define ST_BUILD_VER            1
43
44 enum {
45         /* MU register offset */
46         IMR0    = 0x10, /* MU_INBOUND_MESSAGE_REG0 */
47         IMR1    = 0x14, /* MU_INBOUND_MESSAGE_REG1 */
48         OMR0    = 0x18, /* MU_OUTBOUND_MESSAGE_REG0 */
49         OMR1    = 0x1c, /* MU_OUTBOUND_MESSAGE_REG1 */
50         IDBL    = 0x20, /* MU_INBOUND_DOORBELL */
51         IIS     = 0x24, /* MU_INBOUND_INTERRUPT_STATUS */
52         IIM     = 0x28, /* MU_INBOUND_INTERRUPT_MASK */
53         ODBL    = 0x2c, /* MU_OUTBOUND_DOORBELL */
54         OIS     = 0x30, /* MU_OUTBOUND_INTERRUPT_STATUS */
55         OIM     = 0x3c, /* MU_OUTBOUND_INTERRUPT_MASK */
56
57         /* MU register value */
58         MU_INBOUND_DOORBELL_HANDSHAKE           = 1,
59         MU_INBOUND_DOORBELL_REQHEADCHANGED      = 2,
60         MU_INBOUND_DOORBELL_STATUSTAILCHANGED   = 4,
61         MU_INBOUND_DOORBELL_HMUSTOPPED          = 8,
62         MU_INBOUND_DOORBELL_RESET               = 16,
63
64         MU_OUTBOUND_DOORBELL_HANDSHAKE          = 1,
65         MU_OUTBOUND_DOORBELL_REQUESTTAILCHANGED = 2,
66         MU_OUTBOUND_DOORBELL_STATUSHEADCHANGED  = 4,
67         MU_OUTBOUND_DOORBELL_BUSCHANGE          = 8,
68         MU_OUTBOUND_DOORBELL_HASEVENT           = 16,
69
70         /* MU status code */
71         MU_STATE_STARTING                       = 1,
72         MU_STATE_FMU_READY_FOR_HANDSHAKE        = 2,
73         MU_STATE_SEND_HANDSHAKE_FRAME           = 3,
74         MU_STATE_STARTED                        = 4,
75         MU_STATE_RESETTING                      = 5,
76
77         MU_MAX_DELAY                            = 120,
78         MU_HANDSHAKE_SIGNATURE                  = 0x55aaaa55,
79         MU_HANDSHAKE_SIGNATURE_HALF             = 0x5a5a0000,
80         MU_HARD_RESET_WAIT                      = 30000,
81         HMU_PARTNER_TYPE                        = 2,
82
83         /* firmware returned values */
84         SRB_STATUS_SUCCESS                      = 0x01,
85         SRB_STATUS_ERROR                        = 0x04,
86         SRB_STATUS_BUSY                         = 0x05,
87         SRB_STATUS_INVALID_REQUEST              = 0x06,
88         SRB_STATUS_SELECTION_TIMEOUT            = 0x0A,
89         SRB_SEE_SENSE                           = 0x80,
90
91         /* task attribute */
92         TASK_ATTRIBUTE_SIMPLE                   = 0x0,
93         TASK_ATTRIBUTE_HEADOFQUEUE              = 0x1,
94         TASK_ATTRIBUTE_ORDERED                  = 0x2,
95         TASK_ATTRIBUTE_ACA                      = 0x4,
96
97         /* request count, etc. */
98         MU_MAX_REQUEST                          = 32,
99
100         /* one message wasted, use MU_MAX_REQUEST+1
101                 to handle MU_MAX_REQUEST messages */
102         MU_REQ_COUNT                            = (MU_MAX_REQUEST + 1),
103         MU_STATUS_COUNT                         = (MU_MAX_REQUEST + 1),
104
105         STEX_CDB_LENGTH                         = MAX_COMMAND_SIZE,
106         REQ_VARIABLE_LEN                        = 1024,
107         STATUS_VAR_LEN                          = 128,
108         ST_CAN_QUEUE                            = MU_MAX_REQUEST,
109         ST_CMD_PER_LUN                          = MU_MAX_REQUEST,
110         ST_MAX_SG                               = 32,
111
112         /* sg flags */
113         SG_CF_EOT                               = 0x80, /* end of table */
114         SG_CF_64B                               = 0x40, /* 64 bit item */
115         SG_CF_HOST                              = 0x20, /* sg in host memory */
116
117         st_shasta                               = 0,
118         st_vsc                                  = 1,
119         st_vsc1                                 = 2,
120         st_yosemite                             = 3,
121
122         PASSTHRU_REQ_TYPE                       = 0x00000001,
123         PASSTHRU_REQ_NO_WAKEUP                  = 0x00000100,
124         ST_INTERNAL_TIMEOUT                     = 30,
125
126         ST_TO_CMD                               = 0,
127         ST_FROM_CMD                             = 1,
128
129         /* vendor specific commands of Promise */
130         MGT_CMD                                 = 0xd8,
131         SINBAND_MGT_CMD                         = 0xd9,
132         ARRAY_CMD                               = 0xe0,
133         CONTROLLER_CMD                          = 0xe1,
134         DEBUGGING_CMD                           = 0xe2,
135         PASSTHRU_CMD                            = 0xe3,
136
137         PASSTHRU_GET_ADAPTER                    = 0x05,
138         PASSTHRU_GET_DRVVER                     = 0x10,
139
140         CTLR_CONFIG_CMD                         = 0x03,
141         CTLR_SHUTDOWN                           = 0x0d,
142
143         CTLR_POWER_STATE_CHANGE                 = 0x0e,
144         CTLR_POWER_SAVING                       = 0x01,
145
146         PASSTHRU_SIGNATURE                      = 0x4e415041,
147         MGT_CMD_SIGNATURE                       = 0xba,
148
149         INQUIRY_EVPD                            = 0x01,
150
151         ST_ADDITIONAL_MEM                       = 0x200000,
152 };
153
154 /* SCSI inquiry data */
155 typedef struct st_inq {
156         u8 DeviceType                   :5;
157         u8 DeviceTypeQualifier          :3;
158         u8 DeviceTypeModifier           :7;
159         u8 RemovableMedia               :1;
160         u8 Versions;
161         u8 ResponseDataFormat           :4;
162         u8 HiSupport                    :1;
163         u8 NormACA                      :1;
164         u8 ReservedBit                  :1;
165         u8 AERC                         :1;
166         u8 AdditionalLength;
167         u8 Reserved[2];
168         u8 SoftReset                    :1;
169         u8 CommandQueue                 :1;
170         u8 Reserved2                    :1;
171         u8 LinkedCommands               :1;
172         u8 Synchronous                  :1;
173         u8 Wide16Bit                    :1;
174         u8 Wide32Bit                    :1;
175         u8 RelativeAddressing           :1;
176         u8 VendorId[8];
177         u8 ProductId[16];
178         u8 ProductRevisionLevel[4];
179         u8 VendorSpecific[20];
180         u8 Reserved3[40];
181 } ST_INQ;
182
183 struct st_sgitem {
184         u8 ctrl;        /* SG_CF_xxx */
185         u8 reserved[3];
186         __le32 count;
187         __le32 addr;
188         __le32 addr_hi;
189 };
190
191 struct st_sgtable {
192         __le16 sg_count;
193         __le16 max_sg_count;
194         __le32 sz_in_byte;
195         struct st_sgitem table[ST_MAX_SG];
196 };
197
198 struct handshake_frame {
199         __le32 rb_phy;          /* request payload queue physical address */
200         __le32 rb_phy_hi;
201         __le16 req_sz;          /* size of each request payload */
202         __le16 req_cnt;         /* count of reqs the buffer can hold */
203         __le16 status_sz;       /* size of each status payload */
204         __le16 status_cnt;      /* count of status the buffer can hold */
205         __le32 hosttime;        /* seconds from Jan 1, 1970 (GMT) */
206         __le32 hosttime_hi;
207         u8 partner_type;        /* who sends this frame */
208         u8 reserved0[7];
209         __le32 partner_ver_major;
210         __le32 partner_ver_minor;
211         __le32 partner_ver_oem;
212         __le32 partner_ver_build;
213         __le32 extra_offset;    /* NEW */
214         __le32 extra_size;      /* NEW */
215         u32 reserved1[2];
216 };
217
218 struct req_msg {
219         __le16 tag;
220         u8 lun;
221         u8 target;
222         u8 task_attr;
223         u8 task_manage;
224         u8 prd_entry;
225         u8 payload_sz;          /* payload size in 4-byte, not used */
226         u8 cdb[STEX_CDB_LENGTH];
227         u8 variable[REQ_VARIABLE_LEN];
228 };
229
230 struct status_msg {
231         __le16 tag;
232         u8 lun;
233         u8 target;
234         u8 srb_status;
235         u8 scsi_status;
236         u8 reserved;
237         u8 payload_sz;          /* payload size in 4-byte */
238         u8 variable[STATUS_VAR_LEN];
239 };
240
241 struct ver_info {
242         u32 major;
243         u32 minor;
244         u32 oem;
245         u32 build;
246         u32 reserved[2];
247 };
248
249 struct st_frame {
250         u32 base[6];
251         u32 rom_addr;
252
253         struct ver_info drv_ver;
254         struct ver_info bios_ver;
255
256         u32 bus;
257         u32 slot;
258         u32 irq_level;
259         u32 irq_vec;
260         u32 id;
261         u32 subid;
262
263         u32 dimm_size;
264         u8 dimm_type;
265         u8 reserved[3];
266
267         u32 channel;
268         u32 reserved1;
269 };
270
271 struct st_drvver {
272         u32 major;
273         u32 minor;
274         u32 oem;
275         u32 build;
276         u32 signature[2];
277         u8 console_id;
278         u8 host_no;
279         u8 reserved0[2];
280         u32 reserved[3];
281 };
282
283 #define MU_REQ_BUFFER_SIZE      (MU_REQ_COUNT * sizeof(struct req_msg))
284 #define MU_STATUS_BUFFER_SIZE   (MU_STATUS_COUNT * sizeof(struct status_msg))
285 #define MU_BUFFER_SIZE          (MU_REQ_BUFFER_SIZE + MU_STATUS_BUFFER_SIZE)
286 #define STEX_EXTRA_SIZE         max(sizeof(struct st_frame), sizeof(ST_INQ))
287 #define STEX_BUFFER_SIZE        (MU_BUFFER_SIZE + STEX_EXTRA_SIZE)
288
289 struct st_ccb {
290         struct req_msg *req;
291         struct scsi_cmnd *cmd;
292
293         void *sense_buffer;
294         unsigned int sense_bufflen;
295         int sg_count;
296
297         u32 req_type;
298         u8 srb_status;
299         u8 scsi_status;
300 };
301
302 struct st_hba {
303         void __iomem *mmio_base;        /* iomapped PCI memory space */
304         void *dma_mem;
305         dma_addr_t dma_handle;
306         size_t dma_size;
307
308         struct Scsi_Host *host;
309         struct pci_dev *pdev;
310
311         u32 req_head;
312         u32 req_tail;
313         u32 status_head;
314         u32 status_tail;
315
316         struct status_msg *status_buffer;
317         void *copy_buffer; /* temp buffer for driver-handled commands */
318         struct st_ccb ccb[MU_MAX_REQUEST];
319         struct st_ccb *wait_ccb;
320         wait_queue_head_t waitq;
321
322         unsigned int mu_status;
323         int out_req_cnt;
324
325         unsigned int cardtype;
326 };
327
328 static const char console_inq_page[] =
329 {
330         0x03,0x00,0x03,0x03,0xFA,0x00,0x00,0x30,
331         0x50,0x72,0x6F,0x6D,0x69,0x73,0x65,0x20,        /* "Promise " */
332         0x52,0x41,0x49,0x44,0x20,0x43,0x6F,0x6E,        /* "RAID Con" */
333         0x73,0x6F,0x6C,0x65,0x20,0x20,0x20,0x20,        /* "sole    " */
334         0x31,0x2E,0x30,0x30,0x20,0x20,0x20,0x20,        /* "1.00    " */
335         0x53,0x58,0x2F,0x52,0x53,0x41,0x46,0x2D,        /* "SX/RSAF-" */
336         0x54,0x45,0x31,0x2E,0x30,0x30,0x20,0x20,        /* "TE1.00  " */
337         0x0C,0x20,0x20,0x20,0x20,0x20,0x20,0x20
338 };
339
340 MODULE_AUTHOR("Ed Lin");
341 MODULE_DESCRIPTION("Promise Technology SuperTrak EX Controllers");
342 MODULE_LICENSE("GPL");
343 MODULE_VERSION(ST_DRIVER_VERSION);
344
345 static void stex_gettime(__le32 *time)
346 {
347         struct timeval tv;
348         do_gettimeofday(&tv);
349
350         *time = cpu_to_le32(tv.tv_sec & 0xffffffff);
351         *(time + 1) = cpu_to_le32((tv.tv_sec >> 16) >> 16);
352 }
353
354 static struct status_msg *stex_get_status(struct st_hba *hba)
355 {
356         struct status_msg *status =
357                 hba->status_buffer + hba->status_tail;
358
359         ++hba->status_tail;
360         hba->status_tail %= MU_STATUS_COUNT;
361
362         return status;
363 }
364
365 static void stex_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
366 {
367         cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
368
369         cmd->sense_buffer[0] = 0x70;    /* fixed format, current */
370         cmd->sense_buffer[2] = sk;
371         cmd->sense_buffer[7] = 18 - 8;  /* additional sense length */
372         cmd->sense_buffer[12] = asc;
373         cmd->sense_buffer[13] = ascq;
374 }
375
376 static void stex_invalid_field(struct scsi_cmnd *cmd,
377                                void (*done)(struct scsi_cmnd *))
378 {
379         /* "Invalid field in cbd" */
380         stex_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
381         done(cmd);
382 }
383
384 static struct req_msg *stex_alloc_req(struct st_hba *hba)
385 {
386         struct req_msg *req = ((struct req_msg *)hba->dma_mem) +
387                 hba->req_head;
388
389         ++hba->req_head;
390         hba->req_head %= MU_REQ_COUNT;
391
392         return req;
393 }
394
395 static int stex_map_sg(struct st_hba *hba,
396         struct req_msg *req, struct st_ccb *ccb)
397 {
398         struct scsi_cmnd *cmd;
399         struct scatterlist *sg;
400         struct st_sgtable *dst;
401         int i, nseg;
402
403         cmd = ccb->cmd;
404         dst = (struct st_sgtable *)req->variable;
405         dst->max_sg_count = cpu_to_le16(ST_MAX_SG);
406         dst->sz_in_byte = cpu_to_le32(scsi_bufflen(cmd));
407
408         nseg = scsi_dma_map(cmd);
409         if (nseg < 0)
410                 return -EIO;
411         if (nseg) {
412                 ccb->sg_count = nseg;
413                 dst->sg_count = cpu_to_le16((u16)nseg);
414
415                 scsi_for_each_sg(cmd, sg, nseg, i) {
416                         dst->table[i].count = cpu_to_le32((u32)sg_dma_len(sg));
417                         dst->table[i].addr =
418                                 cpu_to_le32(sg_dma_address(sg) & 0xffffffff);
419                         dst->table[i].addr_hi =
420                                 cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
421                         dst->table[i].ctrl = SG_CF_64B | SG_CF_HOST;
422                 }
423                 dst->table[--i].ctrl |= SG_CF_EOT;
424         }
425
426         return 0;
427 }
428
429 static void stex_internal_copy(struct scsi_cmnd *cmd,
430         const void *src, size_t *count, int sg_count, int direction)
431 {
432         size_t lcount;
433         size_t len;
434         void *s, *d, *base = NULL;
435         size_t offset;
436
437         if (*count > scsi_bufflen(cmd))
438                 *count = scsi_bufflen(cmd);
439         lcount = *count;
440         while (lcount) {
441                 len = lcount;
442                 s = (void *)src;
443
444                 offset = *count - lcount;
445                 s += offset;
446                 base = scsi_kmap_atomic_sg(scsi_sglist(cmd),
447                                            sg_count, &offset, &len);
448                 if (!base) {
449                         *count -= lcount;
450                         return;
451                 }
452                 d = base + offset;
453
454                 if (direction == ST_TO_CMD)
455                         memcpy(d, s, len);
456                 else
457                         memcpy(s, d, len);
458
459                 lcount -= len;
460                 scsi_kunmap_atomic_sg(base);
461         }
462 }
463
464 static void stex_controller_info(struct st_hba *hba, struct st_ccb *ccb)
465 {
466         struct st_frame *p;
467         size_t count = sizeof(struct st_frame);
468
469         p = hba->copy_buffer;
470         stex_internal_copy(ccb->cmd, p, &count, scsi_sg_count(ccb->cmd),
471                            ST_FROM_CMD);
472         memset(p->base, 0, sizeof(u32)*6);
473         *(unsigned long *)(p->base) = pci_resource_start(hba->pdev, 0);
474         p->rom_addr = 0;
475
476         p->drv_ver.major = ST_VER_MAJOR;
477         p->drv_ver.minor = ST_VER_MINOR;
478         p->drv_ver.oem = ST_OEM;
479         p->drv_ver.build = ST_BUILD_VER;
480
481         p->bus = hba->pdev->bus->number;
482         p->slot = hba->pdev->devfn;
483         p->irq_level = 0;
484         p->irq_vec = hba->pdev->irq;
485         p->id = hba->pdev->vendor << 16 | hba->pdev->device;
486         p->subid =
487                 hba->pdev->subsystem_vendor << 16 | hba->pdev->subsystem_device;
488
489         stex_internal_copy(ccb->cmd, p, &count, scsi_sg_count(ccb->cmd),
490                            ST_TO_CMD);
491 }
492
493 static void
494 stex_send_cmd(struct st_hba *hba, struct req_msg *req, u16 tag)
495 {
496         req->tag = cpu_to_le16(tag);
497         req->task_attr = TASK_ATTRIBUTE_SIMPLE;
498         req->task_manage = 0; /* not supported yet */
499
500         hba->ccb[tag].req = req;
501         hba->out_req_cnt++;
502
503         writel(hba->req_head, hba->mmio_base + IMR0);
504         writel(MU_INBOUND_DOORBELL_REQHEADCHANGED, hba->mmio_base + IDBL);
505         readl(hba->mmio_base + IDBL); /* flush */
506 }
507
508 static int
509 stex_slave_alloc(struct scsi_device *sdev)
510 {
511         /* Cheat: usually extracted from Inquiry data */
512         sdev->tagged_supported = 1;
513
514         scsi_activate_tcq(sdev, sdev->host->can_queue);
515
516         return 0;
517 }
518
519 static int
520 stex_slave_config(struct scsi_device *sdev)
521 {
522         sdev->use_10_for_rw = 1;
523         sdev->use_10_for_ms = 1;
524         sdev->timeout = 60 * HZ;
525         sdev->tagged_supported = 1;
526
527         return 0;
528 }
529
530 static void
531 stex_slave_destroy(struct scsi_device *sdev)
532 {
533         scsi_deactivate_tcq(sdev, 1);
534 }
535
536 static int
537 stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
538 {
539         struct st_hba *hba;
540         struct Scsi_Host *host;
541         unsigned int id,lun;
542         struct req_msg *req;
543         u16 tag;
544         host = cmd->device->host;
545         id = cmd->device->id;
546         lun = cmd->device->lun;
547         hba = (struct st_hba *) &host->hostdata[0];
548
549         switch (cmd->cmnd[0]) {
550         case MODE_SENSE_10:
551         {
552                 static char ms10_caching_page[12] =
553                         { 0, 0x12, 0, 0, 0, 0, 0, 0, 0x8, 0xa, 0x4, 0 };
554                 unsigned char page;
555                 page = cmd->cmnd[2] & 0x3f;
556                 if (page == 0x8 || page == 0x3f) {
557                         size_t cp_len = sizeof(ms10_caching_page);
558                         stex_internal_copy(cmd, ms10_caching_page,
559                                            &cp_len, scsi_sg_count(cmd),
560                                            ST_TO_CMD);
561                         cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
562                         done(cmd);
563                 } else
564                         stex_invalid_field(cmd, done);
565                 return 0;
566         }
567         case REPORT_LUNS:
568                 /*
569                  * The shasta firmware does not report actual luns in the
570                  * target, so fail the command to force sequential lun scan.
571                  * Also, the console device does not support this command.
572                  */
573                 if (hba->cardtype == st_shasta || id == host->max_id - 1) {
574                         stex_invalid_field(cmd, done);
575                         return 0;
576                 }
577                 break;
578         case TEST_UNIT_READY:
579                 if (id == host->max_id - 1) {
580                         cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
581                         done(cmd);
582                         return 0;
583                 }
584                 break;
585         case INQUIRY:
586                 if (id != host->max_id - 1)
587                         break;
588                 if (lun == 0 && (cmd->cmnd[1] & INQUIRY_EVPD) == 0) {
589                         size_t cp_len = sizeof(console_inq_page);
590                         stex_internal_copy(cmd, console_inq_page,
591                                            &cp_len, scsi_sg_count(cmd),
592                                            ST_TO_CMD);
593                         cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
594                         done(cmd);
595                 } else
596                         stex_invalid_field(cmd, done);
597                 return 0;
598         case PASSTHRU_CMD:
599                 if (cmd->cmnd[1] == PASSTHRU_GET_DRVVER) {
600                         struct st_drvver ver;
601                         size_t cp_len = sizeof(ver);
602                         ver.major = ST_VER_MAJOR;
603                         ver.minor = ST_VER_MINOR;
604                         ver.oem = ST_OEM;
605                         ver.build = ST_BUILD_VER;
606                         ver.signature[0] = PASSTHRU_SIGNATURE;
607                         ver.console_id = host->max_id - 1;
608                         ver.host_no = hba->host->host_no;
609                         stex_internal_copy(cmd, &ver, &cp_len,
610                                            scsi_sg_count(cmd), ST_TO_CMD);
611                         cmd->result = sizeof(ver) == cp_len ?
612                                 DID_OK << 16 | COMMAND_COMPLETE << 8 :
613                                 DID_ERROR << 16 | COMMAND_COMPLETE << 8;
614                         done(cmd);
615                         return 0;
616                 }
617         default:
618                 break;
619         }
620
621         cmd->scsi_done = done;
622
623         tag = cmd->request->tag;
624
625         if (unlikely(tag >= host->can_queue))
626                 return SCSI_MLQUEUE_HOST_BUSY;
627
628         req = stex_alloc_req(hba);
629
630         req->lun = lun;
631         req->target = id;
632
633         /* cdb */
634         memcpy(req->cdb, cmd->cmnd, STEX_CDB_LENGTH);
635
636         hba->ccb[tag].cmd = cmd;
637         hba->ccb[tag].sense_bufflen = SCSI_SENSE_BUFFERSIZE;
638         hba->ccb[tag].sense_buffer = cmd->sense_buffer;
639         hba->ccb[tag].req_type = 0;
640
641         if (cmd->sc_data_direction != DMA_NONE)
642                 stex_map_sg(hba, req, &hba->ccb[tag]);
643
644         stex_send_cmd(hba, req, tag);
645         return 0;
646 }
647
648 static void stex_scsi_done(struct st_ccb *ccb)
649 {
650         struct scsi_cmnd *cmd = ccb->cmd;
651         int result;
652
653         if (ccb->srb_status == SRB_STATUS_SUCCESS ||  ccb->srb_status == 0) {
654                 result = ccb->scsi_status;
655                 switch (ccb->scsi_status) {
656                 case SAM_STAT_GOOD:
657                         result |= DID_OK << 16 | COMMAND_COMPLETE << 8;
658                         break;
659                 case SAM_STAT_CHECK_CONDITION:
660                         result |= DRIVER_SENSE << 24;
661                         break;
662                 case SAM_STAT_BUSY:
663                         result |= DID_BUS_BUSY << 16 | COMMAND_COMPLETE << 8;
664                         break;
665                 default:
666                         result |= DID_ERROR << 16 | COMMAND_COMPLETE << 8;
667                         break;
668                 }
669         }
670         else if (ccb->srb_status & SRB_SEE_SENSE)
671                 result = DRIVER_SENSE << 24 | SAM_STAT_CHECK_CONDITION;
672         else switch (ccb->srb_status) {
673                 case SRB_STATUS_SELECTION_TIMEOUT:
674                         result = DID_NO_CONNECT << 16 | COMMAND_COMPLETE << 8;
675                         break;
676                 case SRB_STATUS_BUSY:
677                         result = DID_BUS_BUSY << 16 | COMMAND_COMPLETE << 8;
678                         break;
679                 case SRB_STATUS_INVALID_REQUEST:
680                 case SRB_STATUS_ERROR:
681                 default:
682                         result = DID_ERROR << 16 | COMMAND_COMPLETE << 8;
683                         break;
684         }
685
686         cmd->result = result;
687         cmd->scsi_done(cmd);
688 }
689
690 static void stex_copy_data(struct st_ccb *ccb,
691         struct status_msg *resp, unsigned int variable)
692 {
693         size_t count = variable;
694         if (resp->scsi_status != SAM_STAT_GOOD) {
695                 if (ccb->sense_buffer != NULL)
696                         memcpy(ccb->sense_buffer, resp->variable,
697                                 min(variable, ccb->sense_bufflen));
698                 return;
699         }
700
701         if (ccb->cmd == NULL)
702                 return;
703         stex_internal_copy(ccb->cmd,
704                 resp->variable, &count, scsi_sg_count(ccb->cmd), ST_TO_CMD);
705 }
706
707 static void stex_ys_commands(struct st_hba *hba,
708         struct st_ccb *ccb, struct status_msg *resp)
709 {
710         size_t count;
711
712         if (ccb->cmd->cmnd[0] == MGT_CMD &&
713                 resp->scsi_status != SAM_STAT_CHECK_CONDITION) {
714                 scsi_set_resid(ccb->cmd, scsi_bufflen(ccb->cmd) -
715                         le32_to_cpu(*(__le32 *)&resp->variable[0]));
716                 return;
717         }
718
719         if (resp->srb_status != 0)
720                 return;
721
722         /* determine inquiry command status by DeviceTypeQualifier */
723         if (ccb->cmd->cmnd[0] == INQUIRY &&
724                 resp->scsi_status == SAM_STAT_GOOD) {
725                 ST_INQ *inq_data;
726
727                 count = STEX_EXTRA_SIZE;
728                 stex_internal_copy(ccb->cmd, hba->copy_buffer,
729                         &count, scsi_sg_count(ccb->cmd), ST_FROM_CMD);
730                 inq_data = (ST_INQ *)hba->copy_buffer;
731                 if (inq_data->DeviceTypeQualifier != 0)
732                         ccb->srb_status = SRB_STATUS_SELECTION_TIMEOUT;
733                 else
734                         ccb->srb_status = SRB_STATUS_SUCCESS;
735         }
736 }
737
738 static void stex_mu_intr(struct st_hba *hba, u32 doorbell)
739 {
740         void __iomem *base = hba->mmio_base;
741         struct status_msg *resp;
742         struct st_ccb *ccb;
743         unsigned int size;
744         u16 tag;
745
746         if (!(doorbell & MU_OUTBOUND_DOORBELL_STATUSHEADCHANGED))
747                 return;
748
749         /* status payloads */
750         hba->status_head = readl(base + OMR1);
751         if (unlikely(hba->status_head >= MU_STATUS_COUNT)) {
752                 printk(KERN_WARNING DRV_NAME "(%s): invalid status head\n",
753                         pci_name(hba->pdev));
754                 return;
755         }
756
757         /*
758          * it's not a valid status payload if:
759          * 1. there are no pending requests(e.g. during init stage)
760          * 2. there are some pending requests, but the controller is in
761          *     reset status, and its type is not st_yosemite
762          * firmware of st_yosemite in reset status will return pending requests
763          * to driver, so we allow it to pass
764          */
765         if (unlikely(hba->out_req_cnt <= 0 ||
766                         (hba->mu_status == MU_STATE_RESETTING &&
767                          hba->cardtype != st_yosemite))) {
768                 hba->status_tail = hba->status_head;
769                 goto update_status;
770         }
771
772         while (hba->status_tail != hba->status_head) {
773                 resp = stex_get_status(hba);
774                 tag = le16_to_cpu(resp->tag);
775                 if (unlikely(tag >= hba->host->can_queue)) {
776                         printk(KERN_WARNING DRV_NAME
777                                 "(%s): invalid tag\n", pci_name(hba->pdev));
778                         continue;
779                 }
780
781                 ccb = &hba->ccb[tag];
782                 if (hba->wait_ccb == ccb)
783                         hba->wait_ccb = NULL;
784                 if (unlikely(ccb->req == NULL)) {
785                         printk(KERN_WARNING DRV_NAME
786                                 "(%s): lagging req\n", pci_name(hba->pdev));
787                         hba->out_req_cnt--;
788                         continue;
789                 }
790
791                 size = resp->payload_sz * sizeof(u32); /* payload size */
792                 if (unlikely(size < sizeof(*resp) - STATUS_VAR_LEN ||
793                         size > sizeof(*resp))) {
794                         printk(KERN_WARNING DRV_NAME "(%s): bad status size\n",
795                                 pci_name(hba->pdev));
796                 } else {
797                         size -= sizeof(*resp) - STATUS_VAR_LEN; /* copy size */
798                         if (size)
799                                 stex_copy_data(ccb, resp, size);
800                 }
801
802                 ccb->srb_status = resp->srb_status;
803                 ccb->scsi_status = resp->scsi_status;
804
805                 if (likely(ccb->cmd != NULL)) {
806                         if (hba->cardtype == st_yosemite)
807                                 stex_ys_commands(hba, ccb, resp);
808
809                         if (unlikely(ccb->cmd->cmnd[0] == PASSTHRU_CMD &&
810                                 ccb->cmd->cmnd[1] == PASSTHRU_GET_ADAPTER))
811                                 stex_controller_info(hba, ccb);
812
813                         scsi_dma_unmap(ccb->cmd);
814                         stex_scsi_done(ccb);
815                         hba->out_req_cnt--;
816                 } else if (ccb->req_type & PASSTHRU_REQ_TYPE) {
817                         hba->out_req_cnt--;
818                         if (ccb->req_type & PASSTHRU_REQ_NO_WAKEUP) {
819                                 ccb->req_type = 0;
820                                 continue;
821                         }
822                         ccb->req_type = 0;
823                         if (waitqueue_active(&hba->waitq))
824                                 wake_up(&hba->waitq);
825                 }
826         }
827
828 update_status:
829         writel(hba->status_head, base + IMR1);
830         readl(base + IMR1); /* flush */
831 }
832
833 static irqreturn_t stex_intr(int irq, void *__hba)
834 {
835         struct st_hba *hba = __hba;
836         void __iomem *base = hba->mmio_base;
837         u32 data;
838         unsigned long flags;
839         int handled = 0;
840
841         spin_lock_irqsave(hba->host->host_lock, flags);
842
843         data = readl(base + ODBL);
844
845         if (data && data != 0xffffffff) {
846                 /* clear the interrupt */
847                 writel(data, base + ODBL);
848                 readl(base + ODBL); /* flush */
849                 stex_mu_intr(hba, data);
850                 handled = 1;
851         }
852
853         spin_unlock_irqrestore(hba->host->host_lock, flags);
854
855         return IRQ_RETVAL(handled);
856 }
857
858 static int stex_handshake(struct st_hba *hba)
859 {
860         void __iomem *base = hba->mmio_base;
861         struct handshake_frame *h;
862         dma_addr_t status_phys;
863         u32 data;
864         unsigned long before;
865
866         if (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
867                 writel(MU_INBOUND_DOORBELL_HANDSHAKE, base + IDBL);
868                 readl(base + IDBL);
869                 before = jiffies;
870                 while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
871                         if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
872                                 printk(KERN_ERR DRV_NAME
873                                         "(%s): no handshake signature\n",
874                                         pci_name(hba->pdev));
875                                 return -1;
876                         }
877                         rmb();
878                         msleep(1);
879                 }
880         }
881
882         udelay(10);
883
884         data = readl(base + OMR1);
885         if ((data & 0xffff0000) == MU_HANDSHAKE_SIGNATURE_HALF) {
886                 data &= 0x0000ffff;
887                 if (hba->host->can_queue > data)
888                         hba->host->can_queue = data;
889         }
890
891         h = (struct handshake_frame *)(hba->dma_mem + MU_REQ_BUFFER_SIZE);
892         h->rb_phy = cpu_to_le32(hba->dma_handle);
893         h->rb_phy_hi = cpu_to_le32((hba->dma_handle >> 16) >> 16);
894         h->req_sz = cpu_to_le16(sizeof(struct req_msg));
895         h->req_cnt = cpu_to_le16(MU_REQ_COUNT);
896         h->status_sz = cpu_to_le16(sizeof(struct status_msg));
897         h->status_cnt = cpu_to_le16(MU_STATUS_COUNT);
898         stex_gettime(&h->hosttime);
899         h->partner_type = HMU_PARTNER_TYPE;
900         if (hba->dma_size > STEX_BUFFER_SIZE) {
901                 h->extra_offset = cpu_to_le32(STEX_BUFFER_SIZE);
902                 h->extra_size = cpu_to_le32(ST_ADDITIONAL_MEM);
903         } else
904                 h->extra_offset = h->extra_size = 0;
905
906         status_phys = hba->dma_handle + MU_REQ_BUFFER_SIZE;
907         writel(status_phys, base + IMR0);
908         readl(base + IMR0);
909         writel((status_phys >> 16) >> 16, base + IMR1);
910         readl(base + IMR1);
911
912         writel((status_phys >> 16) >> 16, base + OMR0); /* old fw compatible */
913         readl(base + OMR0);
914         writel(MU_INBOUND_DOORBELL_HANDSHAKE, base + IDBL);
915         readl(base + IDBL); /* flush */
916
917         udelay(10);
918         before = jiffies;
919         while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
920                 if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
921                         printk(KERN_ERR DRV_NAME
922                                 "(%s): no signature after handshake frame\n",
923                                 pci_name(hba->pdev));
924                         return -1;
925                 }
926                 rmb();
927                 msleep(1);
928         }
929
930         writel(0, base + IMR0);
931         readl(base + IMR0);
932         writel(0, base + OMR0);
933         readl(base + OMR0);
934         writel(0, base + IMR1);
935         readl(base + IMR1);
936         writel(0, base + OMR1);
937         readl(base + OMR1); /* flush */
938         hba->mu_status = MU_STATE_STARTED;
939         return 0;
940 }
941
942 static int stex_abort(struct scsi_cmnd *cmd)
943 {
944         struct Scsi_Host *host = cmd->device->host;
945         struct st_hba *hba = (struct st_hba *)host->hostdata;
946         u16 tag = cmd->request->tag;
947         void __iomem *base;
948         u32 data;
949         int result = SUCCESS;
950         unsigned long flags;
951
952         printk(KERN_INFO DRV_NAME
953                 "(%s): aborting command\n", pci_name(hba->pdev));
954         scsi_print_command(cmd);
955
956         base = hba->mmio_base;
957         spin_lock_irqsave(host->host_lock, flags);
958         if (tag < host->can_queue && hba->ccb[tag].cmd == cmd)
959                 hba->wait_ccb = &hba->ccb[tag];
960         else {
961                 for (tag = 0; tag < host->can_queue; tag++)
962                         if (hba->ccb[tag].cmd == cmd) {
963                                 hba->wait_ccb = &hba->ccb[tag];
964                                 break;
965                         }
966                 if (tag >= host->can_queue)
967                         goto out;
968         }
969
970         data = readl(base + ODBL);
971         if (data == 0 || data == 0xffffffff)
972                 goto fail_out;
973
974         writel(data, base + ODBL);
975         readl(base + ODBL); /* flush */
976
977         stex_mu_intr(hba, data);
978
979         if (hba->wait_ccb == NULL) {
980                 printk(KERN_WARNING DRV_NAME
981                         "(%s): lost interrupt\n", pci_name(hba->pdev));
982                 goto out;
983         }
984
985 fail_out:
986         scsi_dma_unmap(cmd);
987         hba->wait_ccb->req = NULL; /* nullify the req's future return */
988         hba->wait_ccb = NULL;
989         result = FAILED;
990 out:
991         spin_unlock_irqrestore(host->host_lock, flags);
992         return result;
993 }
994
995 static void stex_hard_reset(struct st_hba *hba)
996 {
997         struct pci_bus *bus;
998         int i;
999         u16 pci_cmd;
1000         u8 pci_bctl;
1001
1002         for (i = 0; i < 16; i++)
1003                 pci_read_config_dword(hba->pdev, i * 4,
1004                         &hba->pdev->saved_config_space[i]);
1005
1006         /* Reset secondary bus. Our controller(MU/ATU) is the only device on
1007            secondary bus. Consult Intel 80331/3 developer's manual for detail */
1008         bus = hba->pdev->bus;
1009         pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &pci_bctl);
1010         pci_bctl |= PCI_BRIDGE_CTL_BUS_RESET;
1011         pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);
1012
1013         /*
1014          * 1 ms may be enough for 8-port controllers. But 16-port controllers
1015          * require more time to finish bus reset. Use 100 ms here for safety
1016          */
1017         msleep(100);
1018         pci_bctl &= ~PCI_BRIDGE_CTL_BUS_RESET;
1019         pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);
1020
1021         for (i = 0; i < MU_HARD_RESET_WAIT; i++) {
1022                 pci_read_config_word(hba->pdev, PCI_COMMAND, &pci_cmd);
1023                 if (pci_cmd != 0xffff && (pci_cmd & PCI_COMMAND_MASTER))
1024                         break;
1025                 msleep(1);
1026         }
1027
1028         ssleep(5);
1029         for (i = 0; i < 16; i++)
1030                 pci_write_config_dword(hba->pdev, i * 4,
1031                         hba->pdev->saved_config_space[i]);
1032 }
1033
1034 static int stex_reset(struct scsi_cmnd *cmd)
1035 {
1036         struct st_hba *hba;
1037         unsigned long flags;
1038         unsigned long before;
1039         hba = (struct st_hba *) &cmd->device->host->hostdata[0];
1040
1041         printk(KERN_INFO DRV_NAME
1042                 "(%s): resetting host\n", pci_name(hba->pdev));
1043         scsi_print_command(cmd);
1044
1045         hba->mu_status = MU_STATE_RESETTING;
1046
1047         if (hba->cardtype == st_shasta)
1048                 stex_hard_reset(hba);
1049
1050         if (hba->cardtype != st_yosemite) {
1051                 if (stex_handshake(hba)) {
1052                         printk(KERN_WARNING DRV_NAME
1053                                 "(%s): resetting: handshake failed\n",
1054                                 pci_name(hba->pdev));
1055                         return FAILED;
1056                 }
1057                 spin_lock_irqsave(hba->host->host_lock, flags);
1058                 hba->req_head = 0;
1059                 hba->req_tail = 0;
1060                 hba->status_head = 0;
1061                 hba->status_tail = 0;
1062                 hba->out_req_cnt = 0;
1063                 spin_unlock_irqrestore(hba->host->host_lock, flags);
1064                 return SUCCESS;
1065         }
1066
1067         /* st_yosemite */
1068         writel(MU_INBOUND_DOORBELL_RESET, hba->mmio_base + IDBL);
1069         readl(hba->mmio_base + IDBL); /* flush */
1070         before = jiffies;
1071         while (hba->out_req_cnt > 0) {
1072                 if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) {
1073                         printk(KERN_WARNING DRV_NAME
1074                                 "(%s): reset timeout\n", pci_name(hba->pdev));
1075                         return FAILED;
1076                 }
1077                 msleep(1);
1078         }
1079
1080         hba->mu_status = MU_STATE_STARTED;
1081         return SUCCESS;
1082 }
1083
1084 static int stex_biosparam(struct scsi_device *sdev,
1085         struct block_device *bdev, sector_t capacity, int geom[])
1086 {
1087         int heads = 255, sectors = 63;
1088
1089         if (capacity < 0x200000) {
1090                 heads = 64;
1091                 sectors = 32;
1092         }
1093
1094         sector_div(capacity, heads * sectors);
1095
1096         geom[0] = heads;
1097         geom[1] = sectors;
1098         geom[2] = capacity;
1099
1100         return 0;
1101 }
1102
1103 static struct scsi_host_template driver_template = {
1104         .module                         = THIS_MODULE,
1105         .name                           = DRV_NAME,
1106         .proc_name                      = DRV_NAME,
1107         .bios_param                     = stex_biosparam,
1108         .queuecommand                   = stex_queuecommand,
1109         .slave_alloc                    = stex_slave_alloc,
1110         .slave_configure                = stex_slave_config,
1111         .slave_destroy                  = stex_slave_destroy,
1112         .eh_abort_handler               = stex_abort,
1113         .eh_host_reset_handler          = stex_reset,
1114         .can_queue                      = ST_CAN_QUEUE,
1115         .this_id                        = -1,
1116         .sg_tablesize                   = ST_MAX_SG,
1117         .cmd_per_lun                    = ST_CMD_PER_LUN,
1118 };
1119
1120 static int stex_set_dma_mask(struct pci_dev * pdev)
1121 {
1122         int ret;
1123         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)
1124                 && !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))
1125                 return 0;
1126         ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1127         if (!ret)
1128                 ret = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1129         return ret;
1130 }
1131
1132 static int __devinit
1133 stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1134 {
1135         struct st_hba *hba;
1136         struct Scsi_Host *host;
1137         int err;
1138
1139         err = pci_enable_device(pdev);
1140         if (err)
1141                 return err;
1142
1143         pci_set_master(pdev);
1144
1145         host = scsi_host_alloc(&driver_template, sizeof(struct st_hba));
1146
1147         if (!host) {
1148                 printk(KERN_ERR DRV_NAME "(%s): scsi_host_alloc failed\n",
1149                         pci_name(pdev));
1150                 err = -ENOMEM;
1151                 goto out_disable;
1152         }
1153
1154         hba = (struct st_hba *)host->hostdata;
1155         memset(hba, 0, sizeof(struct st_hba));
1156
1157         err = pci_request_regions(pdev, DRV_NAME);
1158         if (err < 0) {
1159                 printk(KERN_ERR DRV_NAME "(%s): request regions failed\n",
1160                         pci_name(pdev));
1161                 goto out_scsi_host_put;
1162         }
1163
1164         hba->mmio_base = ioremap_nocache(pci_resource_start(pdev, 0),
1165                 pci_resource_len(pdev, 0));
1166         if ( !hba->mmio_base) {
1167                 printk(KERN_ERR DRV_NAME "(%s): memory map failed\n",
1168                         pci_name(pdev));
1169                 err = -ENOMEM;
1170                 goto out_release_regions;
1171         }
1172
1173         err = stex_set_dma_mask(pdev);
1174         if (err) {
1175                 printk(KERN_ERR DRV_NAME "(%s): set dma mask failed\n",
1176                         pci_name(pdev));
1177                 goto out_iounmap;
1178         }
1179
1180         hba->cardtype = (unsigned int) id->driver_data;
1181         if (hba->cardtype == st_vsc && (pdev->subsystem_device & 0xf) == 0x1)
1182                 hba->cardtype = st_vsc1;
1183         hba->dma_size = (hba->cardtype == st_vsc1) ?
1184                 (STEX_BUFFER_SIZE + ST_ADDITIONAL_MEM) : (STEX_BUFFER_SIZE);
1185         hba->dma_mem = dma_alloc_coherent(&pdev->dev,
1186                 hba->dma_size, &hba->dma_handle, GFP_KERNEL);
1187         if (!hba->dma_mem) {
1188                 err = -ENOMEM;
1189                 printk(KERN_ERR DRV_NAME "(%s): dma mem alloc failed\n",
1190                         pci_name(pdev));
1191                 goto out_iounmap;
1192         }
1193
1194         hba->status_buffer =
1195                 (struct status_msg *)(hba->dma_mem + MU_REQ_BUFFER_SIZE);
1196         hba->copy_buffer = hba->dma_mem + MU_BUFFER_SIZE;
1197         hba->mu_status = MU_STATE_STARTING;
1198
1199         if (hba->cardtype == st_shasta) {
1200                 host->max_lun = 8;
1201                 host->max_id = 16 + 1;
1202         } else if (hba->cardtype == st_yosemite) {
1203                 host->max_lun = 128;
1204                 host->max_id = 1 + 1;
1205         } else {
1206                 /* st_vsc and st_vsc1 */
1207                 host->max_lun = 1;
1208                 host->max_id = 128 + 1;
1209         }
1210         host->max_channel = 0;
1211         host->unique_id = host->host_no;
1212         host->max_cmd_len = STEX_CDB_LENGTH;
1213
1214         hba->host = host;
1215         hba->pdev = pdev;
1216         init_waitqueue_head(&hba->waitq);
1217
1218         err = request_irq(pdev->irq, stex_intr, IRQF_SHARED, DRV_NAME, hba);
1219         if (err) {
1220                 printk(KERN_ERR DRV_NAME "(%s): request irq failed\n",
1221                         pci_name(pdev));
1222                 goto out_pci_free;
1223         }
1224
1225         err = stex_handshake(hba);
1226         if (err)
1227                 goto out_free_irq;
1228
1229         err = scsi_init_shared_tag_map(host, host->can_queue);
1230         if (err) {
1231                 printk(KERN_ERR DRV_NAME "(%s): init shared queue failed\n",
1232                         pci_name(pdev));
1233                 goto out_free_irq;
1234         }
1235
1236         pci_set_drvdata(pdev, hba);
1237
1238         err = scsi_add_host(host, &pdev->dev);
1239         if (err) {
1240                 printk(KERN_ERR DRV_NAME "(%s): scsi_add_host failed\n",
1241                         pci_name(pdev));
1242                 goto out_free_irq;
1243         }
1244
1245         scsi_scan_host(host);
1246
1247         return 0;
1248
1249 out_free_irq:
1250         free_irq(pdev->irq, hba);
1251 out_pci_free:
1252         dma_free_coherent(&pdev->dev, hba->dma_size,
1253                           hba->dma_mem, hba->dma_handle);
1254 out_iounmap:
1255         iounmap(hba->mmio_base);
1256 out_release_regions:
1257         pci_release_regions(pdev);
1258 out_scsi_host_put:
1259         scsi_host_put(host);
1260 out_disable:
1261         pci_disable_device(pdev);
1262
1263         return err;
1264 }
1265
1266 static void stex_hba_stop(struct st_hba *hba)
1267 {
1268         struct req_msg *req;
1269         unsigned long flags;
1270         unsigned long before;
1271         u16 tag = 0;
1272
1273         spin_lock_irqsave(hba->host->host_lock, flags);
1274         req = stex_alloc_req(hba);
1275         memset(req->cdb, 0, STEX_CDB_LENGTH);
1276
1277         if (hba->cardtype == st_yosemite) {
1278                 req->cdb[0] = MGT_CMD;
1279                 req->cdb[1] = MGT_CMD_SIGNATURE;
1280                 req->cdb[2] = CTLR_CONFIG_CMD;
1281                 req->cdb[3] = CTLR_SHUTDOWN;
1282         } else {
1283                 req->cdb[0] = CONTROLLER_CMD;
1284                 req->cdb[1] = CTLR_POWER_STATE_CHANGE;
1285                 req->cdb[2] = CTLR_POWER_SAVING;
1286         }
1287
1288         hba->ccb[tag].cmd = NULL;
1289         hba->ccb[tag].sg_count = 0;
1290         hba->ccb[tag].sense_bufflen = 0;
1291         hba->ccb[tag].sense_buffer = NULL;
1292         hba->ccb[tag].req_type |= PASSTHRU_REQ_TYPE;
1293
1294         stex_send_cmd(hba, req, tag);
1295         spin_unlock_irqrestore(hba->host->host_lock, flags);
1296
1297         before = jiffies;
1298         while (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) {
1299                 if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ))
1300                         return;
1301                 msleep(10);
1302         }
1303 }
1304
1305 static void stex_hba_free(struct st_hba *hba)
1306 {
1307         free_irq(hba->pdev->irq, hba);
1308
1309         iounmap(hba->mmio_base);
1310
1311         pci_release_regions(hba->pdev);
1312
1313         dma_free_coherent(&hba->pdev->dev, hba->dma_size,
1314                           hba->dma_mem, hba->dma_handle);
1315 }
1316
1317 static void stex_remove(struct pci_dev *pdev)
1318 {
1319         struct st_hba *hba = pci_get_drvdata(pdev);
1320
1321         scsi_remove_host(hba->host);
1322
1323         pci_set_drvdata(pdev, NULL);
1324
1325         stex_hba_stop(hba);
1326
1327         stex_hba_free(hba);
1328
1329         scsi_host_put(hba->host);
1330
1331         pci_disable_device(pdev);
1332 }
1333
1334 static void stex_shutdown(struct pci_dev *pdev)
1335 {
1336         struct st_hba *hba = pci_get_drvdata(pdev);
1337
1338         stex_hba_stop(hba);
1339 }
1340
1341 static struct pci_device_id stex_pci_tbl[] = {
1342         /* st_shasta */
1343         { 0x105a, 0x8350, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1344                 st_shasta }, /* SuperTrak EX8350/8300/16350/16300 */
1345         { 0x105a, 0xc350, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1346                 st_shasta }, /* SuperTrak EX12350 */
1347         { 0x105a, 0x4302, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1348                 st_shasta }, /* SuperTrak EX4350 */
1349         { 0x105a, 0xe350, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1350                 st_shasta }, /* SuperTrak EX24350 */
1351
1352         /* st_vsc */
1353         { 0x105a, 0x7250, PCI_ANY_ID, PCI_ANY_ID, 0, 0, st_vsc },
1354
1355         /* st_yosemite */
1356         { 0x105a, 0x8650, PCI_ANY_ID, 0x4600, 0, 0,
1357                 st_yosemite }, /* SuperTrak EX4650 */
1358         { 0x105a, 0x8650, PCI_ANY_ID, 0x4610, 0, 0,
1359                 st_yosemite }, /* SuperTrak EX4650o */
1360         { 0x105a, 0x8650, PCI_ANY_ID, 0x8600, 0, 0,
1361                 st_yosemite }, /* SuperTrak EX8650EL */
1362         { 0x105a, 0x8650, PCI_ANY_ID, 0x8601, 0, 0,
1363                 st_yosemite }, /* SuperTrak EX8650 */
1364         { 0x105a, 0x8650, PCI_ANY_ID, 0x8602, 0, 0,
1365                 st_yosemite }, /* SuperTrak EX8654 */
1366         { 0x105a, 0x8650, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
1367                 st_yosemite }, /* generic st_yosemite */
1368         { }     /* terminate list */
1369 };
1370 MODULE_DEVICE_TABLE(pci, stex_pci_tbl);
1371
1372 static struct pci_driver stex_pci_driver = {
1373         .name           = DRV_NAME,
1374         .id_table       = stex_pci_tbl,
1375         .probe          = stex_probe,
1376         .remove         = __devexit_p(stex_remove),
1377         .shutdown       = stex_shutdown,
1378 };
1379
1380 static int __init stex_init(void)
1381 {
1382         printk(KERN_INFO DRV_NAME
1383                 ": Promise SuperTrak EX Driver version: %s\n",
1384                  ST_DRIVER_VERSION);
1385
1386         return pci_register_driver(&stex_pci_driver);
1387 }
1388
1389 static void __exit stex_exit(void)
1390 {
1391         pci_unregister_driver(&stex_pci_driver);
1392 }
1393
1394 module_init(stex_init);
1395 module_exit(stex_exit);