1 /*
2 * dc395x.c
3 *
4 * Device Driver for Tekram DC395(U/UW/F), DC315(U)
5 * PCI SCSI Bus Master Host Adapter
6 * (SCSI chip set used Tekram ASIC TRM-S1040)
7 *
8 * Authors:
9 * C.L. Huang <ching@tekram.com.tw>
10 * Erich Chen <erich@tekram.com.tw>
11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
12 *
13 * Kurt Garloff <garloff@suse.de>
14 * (C) 1999-2000 Kurt Garloff
15 *
16 * Oliver Neukum <oliver@neukum.name>
17 * Ali Akcaagac <aliakc@web.de>
18 * Jamie Lenehan <lenehan@twibble.org>
19 * (C) 2003
20 *
21 * License: GNU GPL
22 *
23 *************************************************************************
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. The name of the author may not be used to endorse or promote products
34 * derived from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 *
47 ************************************************************************
48 */
49 #include <linux/module.h>
50 #include <linux/moduleparam.h>
51 #include <linux/delay.h>
52 #include <linux/ctype.h>
53 #include <linux/blkdev.h>
54 #include <linux/interrupt.h>
55 #include <linux/init.h>
56 #include <linux/spinlock.h>
57 #include <linux/pci.h>
58 #include <linux/list.h>
59 #include <linux/vmalloc.h>
60 #include <linux/slab.h>
61 #include <asm/io.h>
62
63 #include <scsi/scsi.h>
64 #include <scsi/scsicam.h> /* needed for scsicam_bios_param */
65 #include <scsi/scsi_cmnd.h>
66 #include <scsi/scsi_device.h>
67 #include <scsi/scsi_host.h>
68
69 #include "dc395x.h"
70
71 #define DC395X_NAME "dc395x"
72 #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
73 #define DC395X_VERSION "v2.05, 2004/03/08"
74
75 /*---------------------------------------------------------------------------
76 Features
77 ---------------------------------------------------------------------------*/
78 /*
79 * Set to disable parts of the driver
80 */
81 /*#define DC395x_NO_DISCONNECT*/
82 /*#define DC395x_NO_TAGQ*/
83 /*#define DC395x_NO_SYNC*/
84 /*#define DC395x_NO_WIDE*/
85
86 /*---------------------------------------------------------------------------
87 Debugging
88 ---------------------------------------------------------------------------*/
89 /*
90 * Types of debugging that can be enabled and disabled
91 */
92 #define DBG_KG 0x0001
93 #define DBG_0 0x0002
94 #define DBG_1 0x0004
95 #define DBG_SG 0x0020
96 #define DBG_FIFO 0x0040
97 #define DBG_PIO 0x0080
98
99
100 /*
101 * Set set of things to output debugging for.
102 * Undefine to remove all debugging
103 */
104 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
105 /*#define DEBUG_MASK DBG_0*/
106
107
108 /*
109 * Output a kernel mesage at the specified level and append the
110 * driver name and a ": " to the start of the message
111 */
112 #define dprintkl(level, format, arg...) \
113 printk(level DC395X_NAME ": " format , ## arg)
114
115
116 #ifdef DEBUG_MASK
117 /*
118 * print a debug message - this is formated with KERN_DEBUG, then the
119 * driver name followed by a ": " and then the message is output.
120 * This also checks that the specified debug level is enabled before
121 * outputing the message
122 */
123 #define dprintkdbg(type, format, arg...) \
124 do { \
125 if ((type) & (DEBUG_MASK)) \
126 dprintkl(KERN_DEBUG , format , ## arg); \
127 } while (0)
128
129 /*
130 * Check if the specified type of debugging is enabled
131 */
132 #define debug_enabled(type) ((DEBUG_MASK) & (type))
133
134 #else
135 /*
136 * No debugging. Do nothing
137 */
138 #define dprintkdbg(type, format, arg...) \
139 do {} while (0)
140 #define debug_enabled(type) (0)
141
142 #endif
143
144
145 #ifndef PCI_VENDOR_ID_TEKRAM
146 #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */
147 #endif
148 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
149 #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */
150 #endif
151
152
153 #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
154 #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
155
156 #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address)))
157 #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address)))
158 #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address)))
159 #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address))
160 #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))
161 #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))
162
163 /* cmd->result */
164 #define RES_TARGET 0x000000FF /* Target State */
165 #define RES_TARGET_LNX STATUS_MASK /* Only official ... */
166 #define RES_ENDMSG 0x0000FF00 /* End Message */
167 #define RES_DID 0x00FF0000 /* DID_ codes */
168 #define RES_DRV 0xFF000000 /* DRIVER_ codes */
169
170 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
171 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
172
173 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
174 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
175 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
176 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
177 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
178
179 #define TAG_NONE 255
180
181 /*
182 * srb->segement_x is the hw sg list. It is always allocated as a
183 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
184 * cross a page boundy.
185 */
186 #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
187
188
189 struct SGentry {
190 u32 address; /* bus! address */
191 u32 length;
192 };
193
194 /* The SEEPROM structure for TRM_S1040 */
195 struct NVRamTarget {
196 u8 cfg0; /* Target configuration byte 0 */
197 u8 period; /* Target period */
198 u8 cfg2; /* Target configuration byte 2 */
199 u8 cfg3; /* Target configuration byte 3 */
200 };
201
202 struct NvRamType {
203 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */
204 u8 sub_sys_id[2]; /* 2,3 Sub System ID */
205 u8 sub_class; /* 4 Sub Class */
206 u8 vendor_id[2]; /* 5,6 Vendor ID */
207 u8 device_id[2]; /* 7,8 Device ID */
208 u8 reserved; /* 9 Reserved */
209 struct NVRamTarget target[DC395x_MAX_SCSI_ID];
210 /** 10,11,12,13
211 ** 14,15,16,17
212 ** ....
213 ** ....
214 ** 70,71,72,73
215 */
216 u8 scsi_id; /* 74 Host Adapter SCSI ID */
217 u8 channel_cfg; /* 75 Channel configuration */
218 u8 delay_time; /* 76 Power on delay time */
219 u8 max_tag; /* 77 Maximum tags */
220 u8 reserved0; /* 78 */
221 u8 boot_target; /* 79 */
222 u8 boot_lun; /* 80 */
223 u8 reserved1; /* 81 */
224 u16 reserved2[22]; /* 82,..125 */
225 u16 cksum; /* 126,127 */
226 };
227
228 struct ScsiReqBlk {
229 struct list_head list; /* next/prev ptrs for srb lists */
230 struct DeviceCtlBlk *dcb;
231 struct scsi_cmnd *cmd;
232
233 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */
234 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */
235
236 u8 sg_count; /* No of HW sg entries for this request */
237 u8 sg_index; /* Index of HW sg entry for this request */
238 size_t total_xfer_length; /* Total number of bytes remaining to be transferred */
239 size_t request_length; /* Total number of bytes in this request */
240 /*
241 * The sense buffer handling function, request_sense, uses
242 * the first hw sg entry (segment_x[0]) and the transfer
243 * length (total_xfer_length). While doing this it stores the
244 * original values into the last sg hw list
245 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
246 * total_xfer_length in xferred. These values are restored in
247 * pci_unmap_srb_sense. This is the only place xferred is used.
248 */
249 size_t xferred; /* Saved copy of total_xfer_length */
250
251 u16 state;
252
253 u8 msgin_buf[6];
254 u8 msgout_buf[6];
255
256 u8 adapter_status;
257 u8 target_status;
258 u8 msg_count;
259 u8 end_message;
260
261 u8 tag_number;
262 u8 status;
263 u8 retry_count;
264 u8 flag;
265
266 u8 scsi_phase;
267 };
268
269 struct DeviceCtlBlk {
270 struct list_head list; /* next/prev ptrs for the dcb list */
271 struct AdapterCtlBlk *acb;
272 struct list_head srb_going_list; /* head of going srb list */
273 struct list_head srb_waiting_list; /* head of waiting srb list */
274
275 struct ScsiReqBlk *active_srb;
276 u32 tag_mask;
277
278 u16 max_command;
279
280 u8 target_id; /* SCSI Target ID (SCSI Only) */
281 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */
282 u8 identify_msg;
283 u8 dev_mode;
284
285 u8 inquiry7; /* To store Inquiry flags */
286 u8 sync_mode; /* 0:async mode */
287 u8 min_nego_period; /* for nego. */
288 u8 sync_period; /* for reg. */
289
290 u8 sync_offset; /* for reg. and nego.(low nibble) */
291 u8 flag;
292 u8 dev_type;
293 u8 init_tcq_flag;
294 };
295
296 struct AdapterCtlBlk {
297 struct Scsi_Host *scsi_host;
298
299 unsigned long io_port_base;
300 unsigned long io_port_len;
301
302 struct list_head dcb_list; /* head of going dcb list */
303 struct DeviceCtlBlk *dcb_run_robin;
304 struct DeviceCtlBlk *active_dcb;
305
306 struct list_head srb_free_list; /* head of free srb list */
307 struct ScsiReqBlk *tmp_srb;
308 struct timer_list waiting_timer;
309 struct timer_list selto_timer;
310
311 unsigned long last_reset;
312
313 u16 srb_count;
314
315 u8 sel_timeout;
316
317 unsigned int irq_level;
318 u8 tag_max_num;
319 u8 acb_flag;
320 u8 gmode2;
321
322 u8 config;
323 u8 lun_chk;
324 u8 scan_devices;
325 u8 hostid_bit;
326
327 u8 dcb_map[DC395x_MAX_SCSI_ID];
328 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
329
330 struct pci_dev *dev;
331
332 u8 msg_len;
333
334 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
335 struct ScsiReqBlk srb;
336
337 struct NvRamType eeprom; /* eeprom settings for this adapter */
338 };
339
340
341 /*---------------------------------------------------------------------------
342 Forward declarations
343 ---------------------------------------------------------------------------*/
344 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
345 u16 *pscsi_status);
346 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
347 u16 *pscsi_status);
348 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
349 u16 *pscsi_status);
350 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
351 u16 *pscsi_status);
352 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
353 u16 *pscsi_status);
354 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
355 u16 *pscsi_status);
356 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
357 u16 *pscsi_status);
358 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
359 u16 *pscsi_status);
360 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
361 u16 *pscsi_status);
362 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
363 u16 *pscsi_status);
364 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
365 u16 *pscsi_status);
366 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
367 u16 *pscsi_status);
368 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
369 u16 *pscsi_status);
370 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
371 u16 *pscsi_status);
372 static void set_basic_config(struct AdapterCtlBlk *acb);
373 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
374 struct ScsiReqBlk *srb);
375 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
376 static void data_io_transfer(struct AdapterCtlBlk *acb,
377 struct ScsiReqBlk *srb, u16 io_dir);
378 static void disconnect(struct AdapterCtlBlk *acb);
379 static void reselect(struct AdapterCtlBlk *acb);
380 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
381 struct ScsiReqBlk *srb);
382 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
383 struct ScsiReqBlk *srb);
384 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
385 struct ScsiReqBlk *srb);
386 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
387 struct scsi_cmnd *cmd, u8 force);
388 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
389 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
390 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
391 struct ScsiReqBlk *srb);
392 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
393 struct ScsiReqBlk *srb);
394 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
395 struct ScsiReqBlk *srb);
396 static void set_xfer_rate(struct AdapterCtlBlk *acb,
397 struct DeviceCtlBlk *dcb);
398 static void waiting_timeout(unsigned long ptr);
399
400
401 /*---------------------------------------------------------------------------
402 Static Data
403 ---------------------------------------------------------------------------*/
404 static u16 current_sync_offset = 0;
405
406 static void *dc395x_scsi_phase0[] = {
407 data_out_phase0,/* phase:0 */
408 data_in_phase0, /* phase:1 */
409 command_phase0, /* phase:2 */
410 status_phase0, /* phase:3 */
411 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
412 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
413 msgout_phase0, /* phase:6 */
414 msgin_phase0, /* phase:7 */
415 };
416
417 static void *dc395x_scsi_phase1[] = {
418 data_out_phase1,/* phase:0 */
419 data_in_phase1, /* phase:1 */
420 command_phase1, /* phase:2 */
421 status_phase1, /* phase:3 */
422 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
423 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
424 msgout_phase1, /* phase:6 */
425 msgin_phase1, /* phase:7 */
426 };
427
428 /*
429 *Fast20: 000 50ns, 20.0 MHz
430 * 001 75ns, 13.3 MHz
431 * 010 100ns, 10.0 MHz
432 * 011 125ns, 8.0 MHz
433 * 100 150ns, 6.6 MHz
434 * 101 175ns, 5.7 MHz
435 * 110 200ns, 5.0 MHz
436 * 111 250ns, 4.0 MHz
437 *
438 *Fast40(LVDS): 000 25ns, 40.0 MHz
439 * 001 50ns, 20.0 MHz
440 * 010 75ns, 13.3 MHz
441 * 011 100ns, 10.0 MHz
442 * 100 125ns, 8.0 MHz
443 * 101 150ns, 6.6 MHz
444 * 110 175ns, 5.7 MHz
445 * 111 200ns, 5.0 MHz
446 */
447 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
448
449 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
450 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
451 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
452
453
454 /*---------------------------------------------------------------------------
455 Configuration
456 ---------------------------------------------------------------------------*/
457 /*
458 * Module/boot parameters currently effect *all* instances of the
459 * card in the system.
460 */
461
462 /*
463 * Command line parameters are stored in a structure below.
464 * These are the index's into the structure for the various
465 * command line options.
466 */
467 #define CFG_ADAPTER_ID 0
468 #define CFG_MAX_SPEED 1
469 #define CFG_DEV_MODE 2
470 #define CFG_ADAPTER_MODE 3
471 #define CFG_TAGS 4
472 #define CFG_RESET_DELAY 5
473
474 #define CFG_NUM 6 /* number of configuration items */
475
476
477 /*
478 * Value used to indicate that a command line override
479 * hasn't been used to modify the value.
480 */
481 #define CFG_PARAM_UNSET -1
482
483
484 /*
485 * Hold command line parameters.
486 */
487 struct ParameterData {
488 int value; /* value of this setting */
489 int min; /* minimum value */
490 int max; /* maximum value */
491 int def; /* default value */
492 int safe; /* safe value */
493 };
494 static struct ParameterData cfg_data[] = {
495 { /* adapter id */
496 CFG_PARAM_UNSET,
497 0,
498 15,
499 7,
500 7
501 },
502 { /* max speed */
503 CFG_PARAM_UNSET,
504 0,
505 7,
506 1, /* 13.3Mhz */
507 4, /* 6.7Hmz */
508 },
509 { /* dev mode */
510 CFG_PARAM_UNSET,
511 0,
512 0x3f,
513 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
514 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
515 NTC_DO_SEND_START,
516 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
517 },
518 { /* adapter mode */
519 CFG_PARAM_UNSET,
520 0,
521 0x2f,
522 NAC_SCANLUN |
523 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
524 /*| NAC_ACTIVE_NEG*/,
525 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
526 },
527 { /* tags */
528 CFG_PARAM_UNSET,
529 0,
530 5,
531 3, /* 16 tags (??) */
532 2,
533 },
534 { /* reset delay */
535 CFG_PARAM_UNSET,
536 0,
537 180,
538 1, /* 1 second */
539 10, /* 10 seconds */
540 }
541 };
542
543
544 /*
545 * Safe settings. If set to zero the BIOS/default values with
546 * command line overrides will be used. If set to 1 then safe and
547 * slow settings will be used.
548 */
549 static bool use_safe_settings = 0;
550 module_param_named(safe, use_safe_settings, bool, 0);
551 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
552
553
554 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
555 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
556
557 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
558 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
559
560 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
561 MODULE_PARM_DESC(dev_mode, "Device mode.");
562
563 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
564 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
565
566 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
567 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
568
569 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
570 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
571
572
573 /**
574 * set_safe_settings - if the use_safe_settings option is set then
575 * set all values to the safe and slow values.
576 **/
set_safe_settings(void)577 static void set_safe_settings(void)
578 {
579 if (use_safe_settings)
580 {
581 int i;
582
583 dprintkl(KERN_INFO, "Using safe settings.\n");
584 for (i = 0; i < CFG_NUM; i++)
585 {
586 cfg_data[i].value = cfg_data[i].safe;
587 }
588 }
589 }
590
591
592 /**
593 * fix_settings - reset any boot parameters which are out of range
594 * back to the default values.
595 **/
fix_settings(void)596 static void fix_settings(void)
597 {
598 int i;
599
600 dprintkdbg(DBG_1,
601 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
602 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
603 cfg_data[CFG_ADAPTER_ID].value,
604 cfg_data[CFG_MAX_SPEED].value,
605 cfg_data[CFG_DEV_MODE].value,
606 cfg_data[CFG_ADAPTER_MODE].value,
607 cfg_data[CFG_TAGS].value,
608 cfg_data[CFG_RESET_DELAY].value);
609 for (i = 0; i < CFG_NUM; i++)
610 {
611 if (cfg_data[i].value < cfg_data[i].min
612 || cfg_data[i].value > cfg_data[i].max)
613 cfg_data[i].value = cfg_data[i].def;
614 }
615 }
616
617
618
619 /*
620 * Mapping from the eeprom delay index value (index into this array)
621 * to the number of actual seconds that the delay should be for.
622 */
623 static char eeprom_index_to_delay_map[] =
624 { 1, 3, 5, 10, 16, 30, 60, 120 };
625
626
627 /**
628 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
629 * into a number of seconds.
630 *
631 * @eeprom: The eeprom structure in which we find the delay index to map.
632 **/
eeprom_index_to_delay(struct NvRamType * eeprom)633 static void eeprom_index_to_delay(struct NvRamType *eeprom)
634 {
635 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
636 }
637
638
639 /**
640 * delay_to_eeprom_index - Take a delay in seconds and return the
641 * closest eeprom index which will delay for at least that amount of
642 * seconds.
643 *
644 * @delay: The delay, in seconds, to find the eeprom index for.
645 **/
delay_to_eeprom_index(int delay)646 static int delay_to_eeprom_index(int delay)
647 {
648 u8 idx = 0;
649 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
650 idx++;
651 return idx;
652 }
653
654
655 /**
656 * eeprom_override - Override the eeprom settings, in the provided
657 * eeprom structure, with values that have been set on the command
658 * line.
659 *
660 * @eeprom: The eeprom data to override with command line options.
661 **/
eeprom_override(struct NvRamType * eeprom)662 static void eeprom_override(struct NvRamType *eeprom)
663 {
664 u8 id;
665
666 /* Adapter Settings */
667 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
668 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
669
670 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
671 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
672
673 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
674 eeprom->delay_time = delay_to_eeprom_index(
675 cfg_data[CFG_RESET_DELAY].value);
676
677 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
678 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
679
680 /* Device Settings */
681 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
682 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
683 eeprom->target[id].cfg0 =
684 (u8)cfg_data[CFG_DEV_MODE].value;
685
686 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
687 eeprom->target[id].period =
688 (u8)cfg_data[CFG_MAX_SPEED].value;
689
690 }
691 }
692
693
694 /*---------------------------------------------------------------------------
695 ---------------------------------------------------------------------------*/
696
list_size(struct list_head * head)697 static unsigned int list_size(struct list_head *head)
698 {
699 unsigned int count = 0;
700 struct list_head *pos;
701 list_for_each(pos, head)
702 count++;
703 return count;
704 }
705
706
dcb_get_next(struct list_head * head,struct DeviceCtlBlk * pos)707 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
708 struct DeviceCtlBlk *pos)
709 {
710 int use_next = 0;
711 struct DeviceCtlBlk* next = NULL;
712 struct DeviceCtlBlk* i;
713
714 if (list_empty(head))
715 return NULL;
716
717 /* find supplied dcb and then select the next one */
718 list_for_each_entry(i, head, list)
719 if (use_next) {
720 next = i;
721 break;
722 } else if (i == pos) {
723 use_next = 1;
724 }
725 /* if no next one take the head one (ie, wraparound) */
726 if (!next)
727 list_for_each_entry(i, head, list) {
728 next = i;
729 break;
730 }
731
732 return next;
733 }
734
735
free_tag(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)736 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
737 {
738 if (srb->tag_number < 255) {
739 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
740 srb->tag_number = 255;
741 }
742 }
743
744
745 /* Find cmd in SRB list */
find_cmd(struct scsi_cmnd * cmd,struct list_head * head)746 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
747 struct list_head *head)
748 {
749 struct ScsiReqBlk *i;
750 list_for_each_entry(i, head, list)
751 if (i->cmd == cmd)
752 return i;
753 return NULL;
754 }
755
756
srb_get_free(struct AdapterCtlBlk * acb)757 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
758 {
759 struct list_head *head = &acb->srb_free_list;
760 struct ScsiReqBlk *srb = NULL;
761
762 if (!list_empty(head)) {
763 srb = list_entry(head->next, struct ScsiReqBlk, list);
764 list_del(head->next);
765 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
766 }
767 return srb;
768 }
769
770
srb_free_insert(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)771 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
772 {
773 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
774 list_add_tail(&srb->list, &acb->srb_free_list);
775 }
776
777
srb_waiting_insert(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)778 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
779 struct ScsiReqBlk *srb)
780 {
781 dprintkdbg(DBG_0, "srb_waiting_insert: (0x%p) <%02i-%i> srb=%p\n",
782 srb->cmd, dcb->target_id, dcb->target_lun, srb);
783 list_add(&srb->list, &dcb->srb_waiting_list);
784 }
785
786
srb_waiting_append(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)787 static void srb_waiting_append(struct DeviceCtlBlk *dcb,
788 struct ScsiReqBlk *srb)
789 {
790 dprintkdbg(DBG_0, "srb_waiting_append: (0x%p) <%02i-%i> srb=%p\n",
791 srb->cmd, dcb->target_id, dcb->target_lun, srb);
792 list_add_tail(&srb->list, &dcb->srb_waiting_list);
793 }
794
795
srb_going_append(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)796 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
797 {
798 dprintkdbg(DBG_0, "srb_going_append: (0x%p) <%02i-%i> srb=%p\n",
799 srb->cmd, dcb->target_id, dcb->target_lun, srb);
800 list_add_tail(&srb->list, &dcb->srb_going_list);
801 }
802
803
srb_going_remove(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)804 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
805 {
806 struct ScsiReqBlk *i;
807 struct ScsiReqBlk *tmp;
808 dprintkdbg(DBG_0, "srb_going_remove: (0x%p) <%02i-%i> srb=%p\n",
809 srb->cmd, dcb->target_id, dcb->target_lun, srb);
810
811 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
812 if (i == srb) {
813 list_del(&srb->list);
814 break;
815 }
816 }
817
818
srb_waiting_remove(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)819 static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
820 struct ScsiReqBlk *srb)
821 {
822 struct ScsiReqBlk *i;
823 struct ScsiReqBlk *tmp;
824 dprintkdbg(DBG_0, "srb_waiting_remove: (0x%p) <%02i-%i> srb=%p\n",
825 srb->cmd, dcb->target_id, dcb->target_lun, srb);
826
827 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
828 if (i == srb) {
829 list_del(&srb->list);
830 break;
831 }
832 }
833
834
srb_going_to_waiting_move(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)835 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
836 struct ScsiReqBlk *srb)
837 {
838 dprintkdbg(DBG_0,
839 "srb_going_to_waiting_move: (0x%p) <%02i-%i> srb=%p\n",
840 srb->cmd, dcb->target_id, dcb->target_lun, srb);
841 list_move(&srb->list, &dcb->srb_waiting_list);
842 }
843
844
srb_waiting_to_going_move(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)845 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
846 struct ScsiReqBlk *srb)
847 {
848 dprintkdbg(DBG_0,
849 "srb_waiting_to_going_move: (0x%p) <%02i-%i> srb=%p\n",
850 srb->cmd, dcb->target_id, dcb->target_lun, srb);
851 list_move(&srb->list, &dcb->srb_going_list);
852 }
853
854
855 /* Sets the timer to wake us up */
waiting_set_timer(struct AdapterCtlBlk * acb,unsigned long to)856 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
857 {
858 if (timer_pending(&acb->waiting_timer))
859 return;
860 init_timer(&acb->waiting_timer);
861 acb->waiting_timer.function = waiting_timeout;
862 acb->waiting_timer.data = (unsigned long) acb;
863 if (time_before(jiffies + to, acb->last_reset - HZ / 2))
864 acb->waiting_timer.expires =
865 acb->last_reset - HZ / 2 + 1;
866 else
867 acb->waiting_timer.expires = jiffies + to + 1;
868 add_timer(&acb->waiting_timer);
869 }
870
871
872 /* Send the next command from the waiting list to the bus */
waiting_process_next(struct AdapterCtlBlk * acb)873 static void waiting_process_next(struct AdapterCtlBlk *acb)
874 {
875 struct DeviceCtlBlk *start = NULL;
876 struct DeviceCtlBlk *pos;
877 struct DeviceCtlBlk *dcb;
878 struct ScsiReqBlk *srb;
879 struct list_head *dcb_list_head = &acb->dcb_list;
880
881 if (acb->active_dcb
882 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
883 return;
884
885 if (timer_pending(&acb->waiting_timer))
886 del_timer(&acb->waiting_timer);
887
888 if (list_empty(dcb_list_head))
889 return;
890
891 /*
892 * Find the starting dcb. Need to find it again in the list
893 * since the list may have changed since we set the ptr to it
894 */
895 list_for_each_entry(dcb, dcb_list_head, list)
896 if (dcb == acb->dcb_run_robin) {
897 start = dcb;
898 break;
899 }
900 if (!start) {
901 /* This can happen! */
902 start = list_entry(dcb_list_head->next, typeof(*start), list);
903 acb->dcb_run_robin = start;
904 }
905
906
907 /*
908 * Loop over the dcb, but we start somewhere (potentially) in
909 * the middle of the loop so we need to manully do this.
910 */
911 pos = start;
912 do {
913 struct list_head *waiting_list_head = &pos->srb_waiting_list;
914
915 /* Make sure, the next another device gets scheduled ... */
916 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
917 acb->dcb_run_robin);
918
919 if (list_empty(waiting_list_head) ||
920 pos->max_command <= list_size(&pos->srb_going_list)) {
921 /* move to next dcb */
922 pos = dcb_get_next(dcb_list_head, pos);
923 } else {
924 srb = list_entry(waiting_list_head->next,
925 struct ScsiReqBlk, list);
926
927 /* Try to send to the bus */
928 if (!start_scsi(acb, pos, srb))
929 srb_waiting_to_going_move(pos, srb);
930 else
931 waiting_set_timer(acb, HZ/50);
932 break;
933 }
934 } while (pos != start);
935 }
936
937
938 /* Wake up waiting queue */
waiting_timeout(unsigned long ptr)939 static void waiting_timeout(unsigned long ptr)
940 {
941 unsigned long flags;
942 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
943 dprintkdbg(DBG_1,
944 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
945 DC395x_LOCK_IO(acb->scsi_host, flags);
946 waiting_process_next(acb);
947 DC395x_UNLOCK_IO(acb->scsi_host, flags);
948 }
949
950
951 /* Get the DCB for a given ID/LUN combination */
find_dcb(struct AdapterCtlBlk * acb,u8 id,u8 lun)952 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
953 {
954 return acb->children[id][lun];
955 }
956
957
958 /* Send SCSI Request Block (srb) to adapter (acb) */
send_srb(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)959 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
960 {
961 struct DeviceCtlBlk *dcb = srb->dcb;
962
963 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
964 acb->active_dcb ||
965 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
966 srb_waiting_append(dcb, srb);
967 waiting_process_next(acb);
968 return;
969 }
970
971 if (!start_scsi(acb, dcb, srb))
972 srb_going_append(dcb, srb);
973 else {
974 srb_waiting_insert(dcb, srb);
975 waiting_set_timer(acb, HZ / 50);
976 }
977 }
978
979 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
build_srb(struct scsi_cmnd * cmd,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)980 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
981 struct ScsiReqBlk *srb)
982 {
983 int nseg;
984 enum dma_data_direction dir = cmd->sc_data_direction;
985 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
986 cmd, dcb->target_id, dcb->target_lun);
987
988 srb->dcb = dcb;
989 srb->cmd = cmd;
990 srb->sg_count = 0;
991 srb->total_xfer_length = 0;
992 srb->sg_bus_addr = 0;
993 srb->sg_index = 0;
994 srb->adapter_status = 0;
995 srb->target_status = 0;
996 srb->msg_count = 0;
997 srb->status = 0;
998 srb->flag = 0;
999 srb->state = 0;
1000 srb->retry_count = 0;
1001 srb->tag_number = TAG_NONE;
1002 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1003 srb->end_message = 0;
1004
1005 nseg = scsi_dma_map(cmd);
1006 BUG_ON(nseg < 0);
1007
1008 if (dir == PCI_DMA_NONE || !nseg) {
1009 dprintkdbg(DBG_0,
1010 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1011 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
1012 srb->segment_x[0].address);
1013 } else {
1014 int i;
1015 u32 reqlen = scsi_bufflen(cmd);
1016 struct scatterlist *sg;
1017 struct SGentry *sgp = srb->segment_x;
1018
1019 srb->sg_count = nseg;
1020
1021 dprintkdbg(DBG_0,
1022 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1023 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
1024 srb->sg_count);
1025
1026 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
1027 u32 busaddr = (u32)sg_dma_address(sg);
1028 u32 seglen = (u32)sg->length;
1029 sgp[i].address = busaddr;
1030 sgp[i].length = seglen;
1031 srb->total_xfer_length += seglen;
1032 }
1033 sgp += srb->sg_count - 1;
1034
1035 /*
1036 * adjust last page if too big as it is allocated
1037 * on even page boundaries
1038 */
1039 if (srb->total_xfer_length > reqlen) {
1040 sgp->length -= (srb->total_xfer_length - reqlen);
1041 srb->total_xfer_length = reqlen;
1042 }
1043
1044 /* Fixup for WIDE padding - make sure length is even */
1045 if (dcb->sync_period & WIDE_SYNC &&
1046 srb->total_xfer_length % 2) {
1047 srb->total_xfer_length++;
1048 sgp->length++;
1049 }
1050
1051 srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1052 srb->segment_x,
1053 SEGMENTX_LEN,
1054 PCI_DMA_TODEVICE);
1055
1056 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1057 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1058 }
1059
1060 srb->request_length = srb->total_xfer_length;
1061 }
1062
1063
1064 /**
1065 * dc395x_queue_command - queue scsi command passed from the mid
1066 * layer, invoke 'done' on completion
1067 *
1068 * @cmd: pointer to scsi command object
1069 * @done: function pointer to be invoked on completion
1070 *
1071 * Returns 1 if the adapter (host) is busy, else returns 0. One
1072 * reason for an adapter to be busy is that the number
1073 * of outstanding queued commands is already equal to
1074 * struct Scsi_Host::can_queue .
1075 *
1076 * Required: if struct Scsi_Host::can_queue is ever non-zero
1077 * then this function is required.
1078 *
1079 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1080 * and is expected to be held on return.
1081 *
1082 **/
dc395x_queue_command_lck(struct scsi_cmnd * cmd,void (* done)(struct scsi_cmnd *))1083 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1084 {
1085 struct DeviceCtlBlk *dcb;
1086 struct ScsiReqBlk *srb;
1087 struct AdapterCtlBlk *acb =
1088 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1089 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
1090 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
1091
1092 /* Assume BAD_TARGET; will be cleared later */
1093 cmd->result = DID_BAD_TARGET << 16;
1094
1095 /* ignore invalid targets */
1096 if (cmd->device->id >= acb->scsi_host->max_id ||
1097 cmd->device->lun >= acb->scsi_host->max_lun ||
1098 cmd->device->lun >31) {
1099 goto complete;
1100 }
1101
1102 /* does the specified lun on the specified device exist */
1103 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1104 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1105 cmd->device->id, (u8)cmd->device->lun);
1106 goto complete;
1107 }
1108
1109 /* do we have a DCB for the device */
1110 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1111 if (!dcb) {
1112 /* should never happen */
1113 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1114 cmd->device->id, (u8)cmd->device->lun);
1115 goto complete;
1116 }
1117
1118 /* set callback and clear result in the command */
1119 cmd->scsi_done = done;
1120 cmd->result = 0;
1121
1122 srb = srb_get_free(acb);
1123 if (!srb)
1124 {
1125 /*
1126 * Return 1 since we are unable to queue this command at this
1127 * point in time.
1128 */
1129 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1130 return 1;
1131 }
1132
1133 build_srb(cmd, dcb, srb);
1134
1135 if (!list_empty(&dcb->srb_waiting_list)) {
1136 /* append to waiting queue */
1137 srb_waiting_append(dcb, srb);
1138 waiting_process_next(acb);
1139 } else {
1140 /* process immediately */
1141 send_srb(acb, srb);
1142 }
1143 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1144 return 0;
1145
1146 complete:
1147 /*
1148 * Complete the command immediatey, and then return 0 to
1149 * indicate that we have handled the command. This is usually
1150 * done when the commad is for things like non existent
1151 * devices.
1152 */
1153 done(cmd);
1154 return 0;
1155 }
1156
DEF_SCSI_QCMD(dc395x_queue_command)1157 static DEF_SCSI_QCMD(dc395x_queue_command)
1158
1159 /*
1160 * Return the disk geometry for the given SCSI device.
1161 */
1162 static int dc395x_bios_param(struct scsi_device *sdev,
1163 struct block_device *bdev, sector_t capacity, int *info)
1164 {
1165 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1166 int heads, sectors, cylinders;
1167 struct AdapterCtlBlk *acb;
1168 int size = capacity;
1169
1170 dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1171 acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1172 heads = 64;
1173 sectors = 32;
1174 cylinders = size / (heads * sectors);
1175
1176 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1177 heads = 255;
1178 sectors = 63;
1179 cylinders = size / (heads * sectors);
1180 }
1181 geom[0] = heads;
1182 geom[1] = sectors;
1183 geom[2] = cylinders;
1184 return 0;
1185 #else
1186 return scsicam_bios_param(bdev, capacity, info);
1187 #endif
1188 }
1189
1190
dump_register_info(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1191 static void dump_register_info(struct AdapterCtlBlk *acb,
1192 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1193 {
1194 u16 pstat;
1195 struct pci_dev *dev = acb->dev;
1196 pci_read_config_word(dev, PCI_STATUS, &pstat);
1197 if (!dcb)
1198 dcb = acb->active_dcb;
1199 if (!srb && dcb)
1200 srb = dcb->active_srb;
1201 if (srb) {
1202 if (!srb->cmd)
1203 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1204 srb, srb->cmd);
1205 else
1206 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1207 "cmnd=0x%02x <%02i-%i>\n",
1208 srb, srb->cmd,
1209 srb->cmd->cmnd[0], srb->cmd->device->id,
1210 (u8)srb->cmd->device->lun);
1211 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1212 srb->segment_x, srb->sg_count, srb->sg_index,
1213 srb->total_xfer_length);
1214 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1215 srb->state, srb->status, srb->scsi_phase,
1216 (acb->active_dcb) ? "" : "not");
1217 }
1218 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1219 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1220 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1221 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1222 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1223 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1224 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1225 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1226 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1227 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1228 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1229 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1230 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1231 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1232 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1233 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1234 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1235 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1236 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1237 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1238 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1239 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1240 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1241 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1242 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1243 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1244 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1245 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1246 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1247 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1248 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1249 "pci{status=0x%04x}\n",
1250 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1251 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1252 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1253 pstat);
1254 }
1255
1256
clear_fifo(struct AdapterCtlBlk * acb,char * txt)1257 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1258 {
1259 #if debug_enabled(DBG_FIFO)
1260 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1261 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1262 if (!(fifocnt & 0x40))
1263 dprintkdbg(DBG_FIFO,
1264 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1265 fifocnt & 0x3f, lines, txt);
1266 #endif
1267 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1268 }
1269
1270
reset_dev_param(struct AdapterCtlBlk * acb)1271 static void reset_dev_param(struct AdapterCtlBlk *acb)
1272 {
1273 struct DeviceCtlBlk *dcb;
1274 struct NvRamType *eeprom = &acb->eeprom;
1275 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1276
1277 list_for_each_entry(dcb, &acb->dcb_list, list) {
1278 u8 period_index;
1279
1280 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1281 dcb->sync_period = 0;
1282 dcb->sync_offset = 0;
1283
1284 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1285 period_index = eeprom->target[dcb->target_id].period & 0x07;
1286 dcb->min_nego_period = clock_period[period_index];
1287 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1288 || !(acb->config & HCC_WIDE_CARD))
1289 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1290 }
1291 }
1292
1293
1294 /*
1295 * perform a hard reset on the SCSI bus
1296 * @cmd - some command for this host (for fetching hooks)
1297 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1298 */
__dc395x_eh_bus_reset(struct scsi_cmnd * cmd)1299 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1300 {
1301 struct AdapterCtlBlk *acb =
1302 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1303 dprintkl(KERN_INFO,
1304 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1305 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1306
1307 if (timer_pending(&acb->waiting_timer))
1308 del_timer(&acb->waiting_timer);
1309
1310 /*
1311 * disable interrupt
1312 */
1313 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1314 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1315 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1316 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1317
1318 reset_scsi_bus(acb);
1319 udelay(500);
1320
1321 /* We may be in serious trouble. Wait some seconds */
1322 acb->last_reset =
1323 jiffies + 3 * HZ / 2 +
1324 HZ * acb->eeprom.delay_time;
1325
1326 /*
1327 * re-enable interrupt
1328 */
1329 /* Clear SCSI FIFO */
1330 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1331 clear_fifo(acb, "eh_bus_reset");
1332 /* Delete pending IRQ */
1333 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1334 set_basic_config(acb);
1335
1336 reset_dev_param(acb);
1337 doing_srb_done(acb, DID_RESET, cmd, 0);
1338 acb->active_dcb = NULL;
1339 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1340 waiting_process_next(acb);
1341
1342 return SUCCESS;
1343 }
1344
dc395x_eh_bus_reset(struct scsi_cmnd * cmd)1345 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1346 {
1347 int rc;
1348
1349 spin_lock_irq(cmd->device->host->host_lock);
1350 rc = __dc395x_eh_bus_reset(cmd);
1351 spin_unlock_irq(cmd->device->host->host_lock);
1352
1353 return rc;
1354 }
1355
1356 /*
1357 * abort an errant SCSI command
1358 * @cmd - command to be aborted
1359 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1360 */
dc395x_eh_abort(struct scsi_cmnd * cmd)1361 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1362 {
1363 /*
1364 * Look into our command queues: If it has not been sent already,
1365 * we remove it and return success. Otherwise fail.
1366 */
1367 struct AdapterCtlBlk *acb =
1368 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1369 struct DeviceCtlBlk *dcb;
1370 struct ScsiReqBlk *srb;
1371 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1372 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1373
1374 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1375 if (!dcb) {
1376 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1377 return FAILED;
1378 }
1379
1380 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1381 if (srb) {
1382 srb_waiting_remove(dcb, srb);
1383 pci_unmap_srb_sense(acb, srb);
1384 pci_unmap_srb(acb, srb);
1385 free_tag(dcb, srb);
1386 srb_free_insert(acb, srb);
1387 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1388 cmd->result = DID_ABORT << 16;
1389 return SUCCESS;
1390 }
1391 srb = find_cmd(cmd, &dcb->srb_going_list);
1392 if (srb) {
1393 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1394 /* XXX: Should abort the command here */
1395 } else {
1396 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1397 }
1398 return FAILED;
1399 }
1400
1401
1402 /* SDTR */
build_sdtr(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1403 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1404 struct ScsiReqBlk *srb)
1405 {
1406 u8 *ptr = srb->msgout_buf + srb->msg_count;
1407 if (srb->msg_count > 1) {
1408 dprintkl(KERN_INFO,
1409 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1410 srb->msg_count, srb->msgout_buf[0],
1411 srb->msgout_buf[1]);
1412 return;
1413 }
1414 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1415 dcb->sync_offset = 0;
1416 dcb->min_nego_period = 200 >> 2;
1417 } else if (dcb->sync_offset == 0)
1418 dcb->sync_offset = SYNC_NEGO_OFFSET;
1419
1420 *ptr++ = MSG_EXTENDED; /* (01h) */
1421 *ptr++ = 3; /* length */
1422 *ptr++ = EXTENDED_SDTR; /* (01h) */
1423 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1424 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1425 srb->msg_count += 5;
1426 srb->state |= SRB_DO_SYNC_NEGO;
1427 }
1428
1429
1430 /* WDTR */
build_wdtr(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1431 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1432 struct ScsiReqBlk *srb)
1433 {
1434 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1435 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1436 u8 *ptr = srb->msgout_buf + srb->msg_count;
1437 if (srb->msg_count > 1) {
1438 dprintkl(KERN_INFO,
1439 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1440 srb->msg_count, srb->msgout_buf[0],
1441 srb->msgout_buf[1]);
1442 return;
1443 }
1444 *ptr++ = MSG_EXTENDED; /* (01h) */
1445 *ptr++ = 2; /* length */
1446 *ptr++ = EXTENDED_WDTR; /* (03h) */
1447 *ptr++ = wide;
1448 srb->msg_count += 4;
1449 srb->state |= SRB_DO_WIDE_NEGO;
1450 }
1451
1452
1453 #if 0
1454 /* Timer to work around chip flaw: When selecting and the bus is
1455 * busy, we sometimes miss a Selection timeout IRQ */
1456 void selection_timeout_missed(unsigned long ptr);
1457 /* Sets the timer to wake us up */
1458 static void selto_timer(struct AdapterCtlBlk *acb)
1459 {
1460 if (timer_pending(&acb->selto_timer))
1461 return;
1462 acb->selto_timer.function = selection_timeout_missed;
1463 acb->selto_timer.data = (unsigned long) acb;
1464 if (time_before
1465 (jiffies + HZ, acb->last_reset + HZ / 2))
1466 acb->selto_timer.expires =
1467 acb->last_reset + HZ / 2 + 1;
1468 else
1469 acb->selto_timer.expires = jiffies + HZ + 1;
1470 add_timer(&acb->selto_timer);
1471 }
1472
1473
1474 void selection_timeout_missed(unsigned long ptr)
1475 {
1476 unsigned long flags;
1477 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1478 struct ScsiReqBlk *srb;
1479 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1480 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1481 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1482 return;
1483 }
1484 DC395x_LOCK_IO(acb->scsi_host, flags);
1485 srb = acb->active_dcb->active_srb;
1486 disconnect(acb);
1487 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1488 }
1489 #endif
1490
1491
start_scsi(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1492 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1493 struct ScsiReqBlk* srb)
1494 {
1495 u16 s_stat2, return_code;
1496 u8 s_stat, scsicommand, i, identify_message;
1497 u8 *ptr;
1498 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1499 dcb->target_id, dcb->target_lun, srb);
1500
1501 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1502
1503 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1504 s_stat2 = 0;
1505 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1506 #if 1
1507 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1508 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1509 s_stat, s_stat2);
1510 /*
1511 * Try anyway?
1512 *
1513 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1514 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1515 * (This is likely to be a bug in the hardware. Obviously, most people
1516 * only have one initiator per SCSI bus.)
1517 * Instead let this fail and have the timer make sure the command is
1518 * tried again after a short time
1519 */
1520 /*selto_timer (acb); */
1521 return 1;
1522 }
1523 #endif
1524 if (acb->active_dcb) {
1525 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1526 "command while another command (0x%p) is active.",
1527 srb->cmd,
1528 acb->active_dcb->active_srb ?
1529 acb->active_dcb->active_srb->cmd : 0);
1530 return 1;
1531 }
1532 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1533 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1534 return 1;
1535 }
1536 /* Allow starting of SCSI commands half a second before we allow the mid-level
1537 * to queue them again after a reset */
1538 if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1539 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1540 return 1;
1541 }
1542
1543 /* Flush FIFO */
1544 clear_fifo(acb, "start_scsi");
1545 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1546 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1547 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1548 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1549 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1550
1551 identify_message = dcb->identify_msg;
1552 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1553 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1554 if (srb->flag & AUTO_REQSENSE)
1555 identify_message &= 0xBF;
1556
1557 if (((srb->cmd->cmnd[0] == INQUIRY)
1558 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1559 || (srb->flag & AUTO_REQSENSE))
1560 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1561 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1562 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1563 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1564 && (dcb->target_lun == 0)) {
1565 srb->msgout_buf[0] = identify_message;
1566 srb->msg_count = 1;
1567 scsicommand = SCMD_SEL_ATNSTOP;
1568 srb->state = SRB_MSGOUT;
1569 #ifndef SYNC_FIRST
1570 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1571 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1572 build_wdtr(acb, dcb, srb);
1573 goto no_cmd;
1574 }
1575 #endif
1576 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1577 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1578 build_sdtr(acb, dcb, srb);
1579 goto no_cmd;
1580 }
1581 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1582 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1583 build_wdtr(acb, dcb, srb);
1584 goto no_cmd;
1585 }
1586 srb->msg_count = 0;
1587 }
1588 /* Send identify message */
1589 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1590
1591 scsicommand = SCMD_SEL_ATN;
1592 srb->state = SRB_START_;
1593 #ifndef DC395x_NO_TAGQ
1594 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1595 && (identify_message & 0xC0)) {
1596 /* Send Tag message */
1597 u32 tag_mask = 1;
1598 u8 tag_number = 0;
1599 while (tag_mask & dcb->tag_mask
1600 && tag_number < dcb->max_command) {
1601 tag_mask = tag_mask << 1;
1602 tag_number++;
1603 }
1604 if (tag_number >= dcb->max_command) {
1605 dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1606 "Out of tags target=<%02i-%i>)\n",
1607 srb->cmd, srb->cmd->device->id,
1608 (u8)srb->cmd->device->lun);
1609 srb->state = SRB_READY;
1610 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1611 DO_HWRESELECT);
1612 return 1;
1613 }
1614 /* Send Tag id */
1615 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1616 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1617 dcb->tag_mask |= tag_mask;
1618 srb->tag_number = tag_number;
1619 scsicommand = SCMD_SEL_ATN3;
1620 srb->state = SRB_START_;
1621 }
1622 #endif
1623 /*polling:*/
1624 /* Send CDB ..command block ......... */
1625 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1626 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1627 srb->cmd->cmnd[0], srb->tag_number);
1628 if (srb->flag & AUTO_REQSENSE) {
1629 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1630 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1631 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1632 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1633 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1634 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1635 } else {
1636 ptr = (u8 *)srb->cmd->cmnd;
1637 for (i = 0; i < srb->cmd->cmd_len; i++)
1638 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1639 }
1640 no_cmd:
1641 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1642 DO_HWRESELECT | DO_DATALATCH);
1643 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1644 /*
1645 * If start_scsi return 1:
1646 * we caught an interrupt (must be reset or reselection ... )
1647 * : Let's process it first!
1648 */
1649 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1650 srb->cmd, dcb->target_id, dcb->target_lun);
1651 srb->state = SRB_READY;
1652 free_tag(dcb, srb);
1653 srb->msg_count = 0;
1654 return_code = 1;
1655 /* This IRQ should NOT get lost, as we did not acknowledge it */
1656 } else {
1657 /*
1658 * If start_scsi returns 0:
1659 * we know that the SCSI processor is free
1660 */
1661 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1662 dcb->active_srb = srb;
1663 acb->active_dcb = dcb;
1664 return_code = 0;
1665 /* it's important for atn stop */
1666 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1667 DO_DATALATCH | DO_HWRESELECT);
1668 /* SCSI command */
1669 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1670 }
1671 return return_code;
1672 }
1673
1674
1675 #define DC395x_ENABLE_MSGOUT \
1676 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1677 srb->state |= SRB_MSGOUT
1678
1679
1680 /* abort command */
enable_msgout_abort(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)1681 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1682 struct ScsiReqBlk *srb)
1683 {
1684 srb->msgout_buf[0] = ABORT;
1685 srb->msg_count = 1;
1686 DC395x_ENABLE_MSGOUT;
1687 srb->state &= ~SRB_MSGIN;
1688 srb->state |= SRB_MSGOUT;
1689 }
1690
1691
1692 /**
1693 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1694 * have been triggered for this card.
1695 *
1696 * @acb: a pointer to the adpter control block
1697 * @scsi_status: the status return when we checked the card
1698 **/
dc395x_handle_interrupt(struct AdapterCtlBlk * acb,u16 scsi_status)1699 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1700 u16 scsi_status)
1701 {
1702 struct DeviceCtlBlk *dcb;
1703 struct ScsiReqBlk *srb;
1704 u16 phase;
1705 u8 scsi_intstatus;
1706 unsigned long flags;
1707 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1708 u16 *);
1709
1710 DC395x_LOCK_IO(acb->scsi_host, flags);
1711
1712 /* This acknowledges the IRQ */
1713 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1714 if ((scsi_status & 0x2007) == 0x2002)
1715 dprintkl(KERN_DEBUG,
1716 "COP after COP completed? %04x\n", scsi_status);
1717 if (debug_enabled(DBG_KG)) {
1718 if (scsi_intstatus & INT_SELTIMEOUT)
1719 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1720 }
1721 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1722
1723 if (timer_pending(&acb->selto_timer))
1724 del_timer(&acb->selto_timer);
1725
1726 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1727 disconnect(acb); /* bus free interrupt */
1728 goto out_unlock;
1729 }
1730 if (scsi_intstatus & INT_RESELECTED) {
1731 reselect(acb);
1732 goto out_unlock;
1733 }
1734 if (scsi_intstatus & INT_SELECT) {
1735 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1736 goto out_unlock;
1737 }
1738 if (scsi_intstatus & INT_SCSIRESET) {
1739 scsi_reset_detect(acb);
1740 goto out_unlock;
1741 }
1742 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1743 dcb = acb->active_dcb;
1744 if (!dcb) {
1745 dprintkl(KERN_DEBUG,
1746 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1747 scsi_status, scsi_intstatus);
1748 goto out_unlock;
1749 }
1750 srb = dcb->active_srb;
1751 if (dcb->flag & ABORT_DEV_) {
1752 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1753 enable_msgout_abort(acb, srb);
1754 }
1755
1756 /* software sequential machine */
1757 phase = (u16)srb->scsi_phase;
1758
1759 /*
1760 * 62037 or 62137
1761 * call dc395x_scsi_phase0[]... "phase entry"
1762 * handle every phase before start transfer
1763 */
1764 /* data_out_phase0, phase:0 */
1765 /* data_in_phase0, phase:1 */
1766 /* command_phase0, phase:2 */
1767 /* status_phase0, phase:3 */
1768 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1769 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1770 /* msgout_phase0, phase:6 */
1771 /* msgin_phase0, phase:7 */
1772 dc395x_statev = dc395x_scsi_phase0[phase];
1773 dc395x_statev(acb, srb, &scsi_status);
1774
1775 /*
1776 * if there were any exception occurred scsi_status
1777 * will be modify to bus free phase new scsi_status
1778 * transfer out from ... previous dc395x_statev
1779 */
1780 srb->scsi_phase = scsi_status & PHASEMASK;
1781 phase = (u16)scsi_status & PHASEMASK;
1782
1783 /*
1784 * call dc395x_scsi_phase1[]... "phase entry" handle
1785 * every phase to do transfer
1786 */
1787 /* data_out_phase1, phase:0 */
1788 /* data_in_phase1, phase:1 */
1789 /* command_phase1, phase:2 */
1790 /* status_phase1, phase:3 */
1791 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1792 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1793 /* msgout_phase1, phase:6 */
1794 /* msgin_phase1, phase:7 */
1795 dc395x_statev = dc395x_scsi_phase1[phase];
1796 dc395x_statev(acb, srb, &scsi_status);
1797 }
1798 out_unlock:
1799 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1800 }
1801
1802
dc395x_interrupt(int irq,void * dev_id)1803 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1804 {
1805 struct AdapterCtlBlk *acb = dev_id;
1806 u16 scsi_status;
1807 u8 dma_status;
1808 irqreturn_t handled = IRQ_NONE;
1809
1810 /*
1811 * Check for pending interrupt
1812 */
1813 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1814 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1815 if (scsi_status & SCSIINTERRUPT) {
1816 /* interrupt pending - let's process it! */
1817 dc395x_handle_interrupt(acb, scsi_status);
1818 handled = IRQ_HANDLED;
1819 }
1820 else if (dma_status & 0x20) {
1821 /* Error from the DMA engine */
1822 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1823 #if 0
1824 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1825 if (acb->active_dcb) {
1826 acb->active_dcb-> flag |= ABORT_DEV_;
1827 if (acb->active_dcb->active_srb)
1828 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1829 }
1830 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1831 #else
1832 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1833 acb = NULL;
1834 #endif
1835 handled = IRQ_HANDLED;
1836 }
1837
1838 return handled;
1839 }
1840
1841
msgout_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1842 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1843 u16 *pscsi_status)
1844 {
1845 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1846 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1847 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1848
1849 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1850 srb->state &= ~SRB_MSGOUT;
1851 }
1852
1853
msgout_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1854 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1855 u16 *pscsi_status)
1856 {
1857 u16 i;
1858 u8 *ptr;
1859 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1860
1861 clear_fifo(acb, "msgout_phase1");
1862 if (!(srb->state & SRB_MSGOUT)) {
1863 srb->state |= SRB_MSGOUT;
1864 dprintkl(KERN_DEBUG,
1865 "msgout_phase1: (0x%p) Phase unexpected\n",
1866 srb->cmd); /* So what ? */
1867 }
1868 if (!srb->msg_count) {
1869 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1870 srb->cmd);
1871 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1872 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1873 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1874 return;
1875 }
1876 ptr = (u8 *)srb->msgout_buf;
1877 for (i = 0; i < srb->msg_count; i++)
1878 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1879 srb->msg_count = 0;
1880 if (srb->msgout_buf[0] == MSG_ABORT)
1881 srb->state = SRB_ABORT_SENT;
1882
1883 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1884 }
1885
1886
command_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1887 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1888 u16 *pscsi_status)
1889 {
1890 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1891 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1892 }
1893
1894
command_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1895 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1896 u16 *pscsi_status)
1897 {
1898 struct DeviceCtlBlk *dcb;
1899 u8 *ptr;
1900 u16 i;
1901 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1902
1903 clear_fifo(acb, "command_phase1");
1904 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1905 if (!(srb->flag & AUTO_REQSENSE)) {
1906 ptr = (u8 *)srb->cmd->cmnd;
1907 for (i = 0; i < srb->cmd->cmd_len; i++) {
1908 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1909 ptr++;
1910 }
1911 } else {
1912 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1913 dcb = acb->active_dcb;
1914 /* target id */
1915 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1916 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1917 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1918 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1919 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1920 }
1921 srb->state |= SRB_COMMAND;
1922 /* it's important for atn stop */
1923 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1924 /* SCSI command */
1925 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1926 }
1927
1928
1929 /*
1930 * Verify that the remaining space in the hw sg lists is the same as
1931 * the count of remaining bytes in srb->total_xfer_length
1932 */
sg_verify_length(struct ScsiReqBlk * srb)1933 static void sg_verify_length(struct ScsiReqBlk *srb)
1934 {
1935 if (debug_enabled(DBG_SG)) {
1936 unsigned len = 0;
1937 unsigned idx = srb->sg_index;
1938 struct SGentry *psge = srb->segment_x + idx;
1939 for (; idx < srb->sg_count; psge++, idx++)
1940 len += psge->length;
1941 if (len != srb->total_xfer_length)
1942 dprintkdbg(DBG_SG,
1943 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1944 srb->total_xfer_length, len);
1945 }
1946 }
1947
1948
1949 /*
1950 * Compute the next Scatter Gather list index and adjust its length
1951 * and address if necessary
1952 */
sg_update_list(struct ScsiReqBlk * srb,u32 left)1953 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1954 {
1955 u8 idx;
1956 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1957 struct SGentry *psge = srb->segment_x + srb->sg_index;
1958
1959 dprintkdbg(DBG_0,
1960 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1961 xferred, srb->total_xfer_length, left);
1962 if (xferred == 0) {
1963 /* nothing to update since we did not transfer any data */
1964 return;
1965 }
1966
1967 sg_verify_length(srb);
1968 srb->total_xfer_length = left; /* update remaining count */
1969 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1970 if (xferred >= psge->length) {
1971 /* Complete SG entries done */
1972 xferred -= psge->length;
1973 } else {
1974 /* Partial SG entry done */
1975 pci_dma_sync_single_for_cpu(srb->dcb->
1976 acb->dev,
1977 srb->sg_bus_addr,
1978 SEGMENTX_LEN,
1979 PCI_DMA_TODEVICE);
1980 psge->length -= xferred;
1981 psge->address += xferred;
1982 srb->sg_index = idx;
1983 pci_dma_sync_single_for_device(srb->dcb->
1984 acb->dev,
1985 srb->sg_bus_addr,
1986 SEGMENTX_LEN,
1987 PCI_DMA_TODEVICE);
1988 break;
1989 }
1990 psge++;
1991 }
1992 sg_verify_length(srb);
1993 }
1994
1995
1996 /*
1997 * We have transferred a single byte (PIO mode?) and need to update
1998 * the count of bytes remaining (total_xfer_length) and update the sg
1999 * entry to either point to next byte in the current sg entry, or of
2000 * already at the end to point to the start of the next sg entry
2001 */
sg_subtract_one(struct ScsiReqBlk * srb)2002 static void sg_subtract_one(struct ScsiReqBlk *srb)
2003 {
2004 sg_update_list(srb, srb->total_xfer_length - 1);
2005 }
2006
2007
2008 /*
2009 * cleanup_after_transfer
2010 *
2011 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2012 * KG: Currently called from StatusPhase1 ()
2013 * Should probably also be called from other places
2014 * Best might be to call it in DataXXPhase0, if new phase will differ
2015 */
cleanup_after_transfer(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2016 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2017 struct ScsiReqBlk *srb)
2018 {
2019 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2020 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2021 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2022 clear_fifo(acb, "cleanup/in");
2023 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2024 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2025 } else { /* write */
2026 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2027 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2028 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2029 clear_fifo(acb, "cleanup/out");
2030 }
2031 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2032 }
2033
2034
2035 /*
2036 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
2037 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2038 */
2039 #define DC395x_LASTPIO 4
2040
2041
data_out_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2042 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2043 u16 *pscsi_status)
2044 {
2045 struct DeviceCtlBlk *dcb = srb->dcb;
2046 u16 scsi_status = *pscsi_status;
2047 u32 d_left_counter = 0;
2048 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
2049 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2050
2051 /*
2052 * KG: We need to drain the buffers before we draw any conclusions!
2053 * This means telling the DMA to push the rest into SCSI, telling
2054 * SCSI to push the rest to the bus.
2055 * However, the device might have been the one to stop us (phase
2056 * change), and the data in transit just needs to be accounted so
2057 * it can be retransmitted.)
2058 */
2059 /*
2060 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2061 * If we need more data, the DMA SG list will be freshly set up, anyway
2062 */
2063 dprintkdbg(DBG_PIO, "data_out_phase0: "
2064 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2065 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2066 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2067 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2068 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2069 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2070 srb->total_xfer_length);
2071 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2072
2073 if (!(srb->state & SRB_XFERPAD)) {
2074 if (scsi_status & PARITYERROR)
2075 srb->status |= PARITY_ERROR;
2076
2077 /*
2078 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2079 * is the no of bytes it got from the DMA engine not the no it
2080 * transferred successfully to the device. (And the difference could
2081 * be as much as the FIFO size, I guess ...)
2082 */
2083 if (!(scsi_status & SCSIXFERDONE)) {
2084 /*
2085 * when data transfer from DMA FIFO to SCSI FIFO
2086 * if there was some data left in SCSI FIFO
2087 */
2088 d_left_counter =
2089 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2090 0x1F);
2091 if (dcb->sync_period & WIDE_SYNC)
2092 d_left_counter <<= 1;
2093
2094 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2095 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2096 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2097 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2098 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2099 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2100 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2101 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2102 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2103 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2104 }
2105 /*
2106 * calculate all the residue data that not yet tranfered
2107 * SCSI transfer counter + left in SCSI FIFO data
2108 *
2109 * .....TRM_S1040_SCSI_COUNTER (24bits)
2110 * The counter always decrement by one for every SCSI byte transfer.
2111 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2112 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2113 */
2114 if (srb->total_xfer_length > DC395x_LASTPIO)
2115 d_left_counter +=
2116 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2117
2118 /* Is this a good idea? */
2119 /*clear_fifo(acb, "DOP1"); */
2120 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2121 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2122 && scsi_bufflen(srb->cmd) % 2) {
2123 d_left_counter = 0;
2124 dprintkl(KERN_INFO,
2125 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2126 scsi_status);
2127 }
2128 /*
2129 * KG: Oops again. Same thinko as above: The SCSI might have been
2130 * faster than the DMA engine, so that it ran out of data.
2131 * In that case, we have to do just nothing!
2132 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2133 */
2134 /*
2135 * KG: This is nonsense: We have been WRITING data to the bus
2136 * If the SCSI engine has no bytes left, how should the DMA engine?
2137 */
2138 if (d_left_counter == 0) {
2139 srb->total_xfer_length = 0;
2140 } else {
2141 /*
2142 * if transfer not yet complete
2143 * there were some data residue in SCSI FIFO or
2144 * SCSI transfer counter not empty
2145 */
2146 long oldxferred =
2147 srb->total_xfer_length - d_left_counter;
2148 const int diff =
2149 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2150 sg_update_list(srb, d_left_counter);
2151 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2152 if ((srb->segment_x[srb->sg_index].length ==
2153 diff && scsi_sg_count(srb->cmd))
2154 || ((oldxferred & ~PAGE_MASK) ==
2155 (PAGE_SIZE - diff))
2156 ) {
2157 dprintkl(KERN_INFO, "data_out_phase0: "
2158 "Work around chip bug (%i)?\n", diff);
2159 d_left_counter =
2160 srb->total_xfer_length - diff;
2161 sg_update_list(srb, d_left_counter);
2162 /*srb->total_xfer_length -= diff; */
2163 /*srb->virt_addr += diff; */
2164 /*if (srb->cmd->use_sg) */
2165 /* srb->sg_index++; */
2166 }
2167 }
2168 }
2169 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2170 cleanup_after_transfer(acb, srb);
2171 }
2172 }
2173
2174
data_out_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2175 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2176 u16 *pscsi_status)
2177 {
2178 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2179 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2180 clear_fifo(acb, "data_out_phase1");
2181 /* do prepare before transfer when data out phase */
2182 data_io_transfer(acb, srb, XFERDATAOUT);
2183 }
2184
data_in_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2185 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2186 u16 *pscsi_status)
2187 {
2188 u16 scsi_status = *pscsi_status;
2189
2190 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2191 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2192
2193 /*
2194 * KG: DataIn is much more tricky than DataOut. When the device is finished
2195 * and switches to another phase, the SCSI engine should be finished too.
2196 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2197 * engine and transferred to memory.
2198 * We should wait for the FIFOs to be emptied by that (is there any way to
2199 * enforce this?) and then stop the DMA engine, because it might think, that
2200 * there are more bytes to follow. Yes, the device might disconnect prior to
2201 * having all bytes transferred!
2202 * Also we should make sure that all data from the DMA engine buffer's really
2203 * made its way to the system memory! Some documentation on this would not
2204 * seem to be a bad idea, actually.
2205 */
2206 if (!(srb->state & SRB_XFERPAD)) {
2207 u32 d_left_counter;
2208 unsigned int sc, fc;
2209
2210 if (scsi_status & PARITYERROR) {
2211 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2212 "Parity Error\n", srb->cmd);
2213 srb->status |= PARITY_ERROR;
2214 }
2215 /*
2216 * KG: We should wait for the DMA FIFO to be empty ...
2217 * but: it would be better to wait first for the SCSI FIFO and then the
2218 * the DMA FIFO to become empty? How do we know, that the device not already
2219 * sent data to the FIFO in a MsgIn phase, eg.?
2220 */
2221 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2222 #if 0
2223 int ctr = 6000000;
2224 dprintkl(KERN_DEBUG,
2225 "DIP0: Wait for DMA FIFO to flush ...\n");
2226 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2227 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2228 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2229 while (!
2230 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2231 0x80) && --ctr);
2232 if (ctr < 6000000 - 1)
2233 dprintkl(KERN_DEBUG
2234 "DIP0: Had to wait for DMA ...\n");
2235 if (!ctr)
2236 dprintkl(KERN_ERR,
2237 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2238 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2239 #endif
2240 dprintkdbg(DBG_KG, "data_in_phase0: "
2241 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2242 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2243 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2244 }
2245 /* Now: Check remainig data: The SCSI counters should tell us ... */
2246 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2247 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2248 d_left_counter = sc + ((fc & 0x1f)
2249 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2250 0));
2251 dprintkdbg(DBG_KG, "data_in_phase0: "
2252 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2253 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2254 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2255 fc,
2256 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2257 sc,
2258 fc,
2259 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2260 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2261 srb->total_xfer_length, d_left_counter);
2262 #if DC395x_LASTPIO
2263 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2264 if (d_left_counter
2265 && srb->total_xfer_length <= DC395x_LASTPIO) {
2266 size_t left_io = srb->total_xfer_length;
2267
2268 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2269 /*sg_update_list (srb, d_left_counter); */
2270 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2271 "for remaining %i bytes:",
2272 fc & 0x1f,
2273 (srb->dcb->sync_period & WIDE_SYNC) ?
2274 "words" : "bytes",
2275 srb->total_xfer_length);
2276 if (srb->dcb->sync_period & WIDE_SYNC)
2277 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2278 CFG2_WIDEFIFO);
2279 while (left_io) {
2280 unsigned char *virt, *base = NULL;
2281 unsigned long flags = 0;
2282 size_t len = left_io;
2283 size_t offset = srb->request_length - left_io;
2284
2285 local_irq_save(flags);
2286 /* Assumption: it's inside one page as it's at most 4 bytes and
2287 I just assume it's on a 4-byte boundary */
2288 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2289 srb->sg_count, &offset, &len);
2290 virt = base + offset;
2291
2292 left_io -= len;
2293
2294 while (len) {
2295 u8 byte;
2296 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2297 *virt++ = byte;
2298
2299 if (debug_enabled(DBG_PIO))
2300 printk(" %02x", byte);
2301
2302 d_left_counter--;
2303 sg_subtract_one(srb);
2304
2305 len--;
2306
2307 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2308
2309 if (fc == 0x40) {
2310 left_io = 0;
2311 break;
2312 }
2313 }
2314
2315 WARN_ON((fc != 0x40) == !d_left_counter);
2316
2317 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2318 /* Read the last byte ... */
2319 if (srb->total_xfer_length > 0) {
2320 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2321
2322 *virt++ = byte;
2323 srb->total_xfer_length--;
2324 if (debug_enabled(DBG_PIO))
2325 printk(" %02x", byte);
2326 }
2327
2328 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2329 }
2330
2331 scsi_kunmap_atomic_sg(base);
2332 local_irq_restore(flags);
2333 }
2334 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2335 /*srb->total_xfer_length = 0; */
2336 if (debug_enabled(DBG_PIO))
2337 printk("\n");
2338 }
2339 #endif /* DC395x_LASTPIO */
2340
2341 #if 0
2342 /*
2343 * KG: This was in DATAOUT. Does it also belong here?
2344 * Nobody seems to know what counter and fifo_cnt count exactly ...
2345 */
2346 if (!(scsi_status & SCSIXFERDONE)) {
2347 /*
2348 * when data transfer from DMA FIFO to SCSI FIFO
2349 * if there was some data left in SCSI FIFO
2350 */
2351 d_left_counter =
2352 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2353 0x1F);
2354 if (srb->dcb->sync_period & WIDE_SYNC)
2355 d_left_counter <<= 1;
2356 /*
2357 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2358 * so need to *= 2
2359 * KG: Seems to be correct ...
2360 */
2361 }
2362 #endif
2363 /* KG: This should not be needed any more! */
2364 if (d_left_counter == 0
2365 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2366 #if 0
2367 int ctr = 6000000;
2368 u8 TempDMAstatus;
2369 do {
2370 TempDMAstatus =
2371 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2372 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2373 if (!ctr)
2374 dprintkl(KERN_ERR,
2375 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2376 srb->total_xfer_length = 0;
2377 #endif
2378 srb->total_xfer_length = d_left_counter;
2379 } else { /* phase changed */
2380 /*
2381 * parsing the case:
2382 * when a transfer not yet complete
2383 * but be disconnected by target
2384 * if transfer not yet complete
2385 * there were some data residue in SCSI FIFO or
2386 * SCSI transfer counter not empty
2387 */
2388 sg_update_list(srb, d_left_counter);
2389 }
2390 }
2391 /* KG: The target may decide to disconnect: Empty FIFO before! */
2392 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2393 cleanup_after_transfer(acb, srb);
2394 }
2395 }
2396
2397
data_in_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2398 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2399 u16 *pscsi_status)
2400 {
2401 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2402 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2403 data_io_transfer(acb, srb, XFERDATAIN);
2404 }
2405
2406
data_io_transfer(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 io_dir)2407 static void data_io_transfer(struct AdapterCtlBlk *acb,
2408 struct ScsiReqBlk *srb, u16 io_dir)
2409 {
2410 struct DeviceCtlBlk *dcb = srb->dcb;
2411 u8 bval;
2412 dprintkdbg(DBG_0,
2413 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2414 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2415 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2416 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2417 if (srb == acb->tmp_srb)
2418 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2419 if (srb->sg_index >= srb->sg_count) {
2420 /* can't happen? out of bounds error */
2421 return;
2422 }
2423
2424 if (srb->total_xfer_length > DC395x_LASTPIO) {
2425 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2426 /*
2427 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2428 * Maybe, even ABORTXFER would be appropriate
2429 */
2430 if (dma_status & XFERPENDING) {
2431 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2432 "Expect trouble!\n");
2433 dump_register_info(acb, dcb, srb);
2434 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2435 }
2436 /* clear_fifo(acb, "IO"); */
2437 /*
2438 * load what physical address of Scatter/Gather list table
2439 * want to be transfer
2440 */
2441 srb->state |= SRB_DATA_XFER;
2442 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2443 if (scsi_sg_count(srb->cmd)) { /* with S/G */
2444 io_dir |= DMACMD_SG;
2445 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2446 srb->sg_bus_addr +
2447 sizeof(struct SGentry) *
2448 srb->sg_index);
2449 /* load how many bytes in the sg list table */
2450 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2451 ((u32)(srb->sg_count -
2452 srb->sg_index) << 3));
2453 } else { /* without S/G */
2454 io_dir &= ~DMACMD_SG;
2455 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2456 srb->segment_x[0].address);
2457 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2458 srb->segment_x[0].length);
2459 }
2460 /* load total transfer length (24bits) max value 16Mbyte */
2461 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2462 srb->total_xfer_length);
2463 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2464 if (io_dir & DMACMD_DIR) { /* read */
2465 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2466 SCMD_DMA_IN);
2467 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2468 } else {
2469 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2470 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2471 SCMD_DMA_OUT);
2472 }
2473
2474 }
2475 #if DC395x_LASTPIO
2476 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2477 /*
2478 * load what physical address of Scatter/Gather list table
2479 * want to be transfer
2480 */
2481 srb->state |= SRB_DATA_XFER;
2482 /* load total transfer length (24bits) max value 16Mbyte */
2483 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2484 srb->total_xfer_length);
2485 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2486 if (io_dir & DMACMD_DIR) { /* read */
2487 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2488 SCMD_FIFO_IN);
2489 } else { /* write */
2490 int ln = srb->total_xfer_length;
2491 size_t left_io = srb->total_xfer_length;
2492
2493 if (srb->dcb->sync_period & WIDE_SYNC)
2494 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2495 CFG2_WIDEFIFO);
2496
2497 while (left_io) {
2498 unsigned char *virt, *base = NULL;
2499 unsigned long flags = 0;
2500 size_t len = left_io;
2501 size_t offset = srb->request_length - left_io;
2502
2503 local_irq_save(flags);
2504 /* Again, max 4 bytes */
2505 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2506 srb->sg_count, &offset, &len);
2507 virt = base + offset;
2508
2509 left_io -= len;
2510
2511 while (len--) {
2512 if (debug_enabled(DBG_PIO))
2513 printk(" %02x", *virt);
2514
2515 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2516
2517 sg_subtract_one(srb);
2518 }
2519
2520 scsi_kunmap_atomic_sg(base);
2521 local_irq_restore(flags);
2522 }
2523 if (srb->dcb->sync_period & WIDE_SYNC) {
2524 if (ln % 2) {
2525 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2526 if (debug_enabled(DBG_PIO))
2527 printk(" |00");
2528 }
2529 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2530 }
2531 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2532 if (debug_enabled(DBG_PIO))
2533 printk("\n");
2534 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2535 SCMD_FIFO_OUT);
2536 }
2537 }
2538 #endif /* DC395x_LASTPIO */
2539 else { /* xfer pad */
2540 u8 data = 0, data2 = 0;
2541 if (srb->sg_count) {
2542 srb->adapter_status = H_OVER_UNDER_RUN;
2543 srb->status |= OVER_RUN;
2544 }
2545 /*
2546 * KG: despite the fact that we are using 16 bits I/O ops
2547 * the SCSI FIFO is only 8 bits according to the docs
2548 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2549 */
2550 if (dcb->sync_period & WIDE_SYNC) {
2551 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2552 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2553 CFG2_WIDEFIFO);
2554 if (io_dir & DMACMD_DIR) {
2555 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2556 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2557 } else {
2558 /* Danger, Robinson: If you find KGs
2559 * scattered over the wide disk, the driver
2560 * or chip is to blame :-( */
2561 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2562 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2563 }
2564 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2565 } else {
2566 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2567 /* Danger, Robinson: If you find a collection of Ks on your disk
2568 * something broke :-( */
2569 if (io_dir & DMACMD_DIR)
2570 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2571 else
2572 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2573 }
2574 srb->state |= SRB_XFERPAD;
2575 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2576 /* SCSI command */
2577 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2578 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2579 }
2580 }
2581
2582
status_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2583 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2584 u16 *pscsi_status)
2585 {
2586 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2587 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2588 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2589 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2590 srb->state = SRB_COMPLETED;
2591 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2592 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2593 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2594 }
2595
2596
status_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2597 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2598 u16 *pscsi_status)
2599 {
2600 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2601 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2602 srb->state = SRB_STATUS;
2603 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2604 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2605 }
2606
2607
2608 /* Check if the message is complete */
msgin_completed(u8 * msgbuf,u32 len)2609 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2610 {
2611 if (*msgbuf == EXTENDED_MESSAGE) {
2612 if (len < 2)
2613 return 0;
2614 if (len < msgbuf[1] + 2)
2615 return 0;
2616 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2617 if (len < 2)
2618 return 0;
2619 return 1;
2620 }
2621
2622 /* reject_msg */
msgin_reject(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2623 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2624 struct ScsiReqBlk *srb)
2625 {
2626 srb->msgout_buf[0] = MESSAGE_REJECT;
2627 srb->msg_count = 1;
2628 DC395x_ENABLE_MSGOUT;
2629 srb->state &= ~SRB_MSGIN;
2630 srb->state |= SRB_MSGOUT;
2631 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2632 srb->msgin_buf[0],
2633 srb->dcb->target_id, srb->dcb->target_lun);
2634 }
2635
2636
msgin_qtag(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,u8 tag)2637 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2638 struct DeviceCtlBlk *dcb, u8 tag)
2639 {
2640 struct ScsiReqBlk *srb = NULL;
2641 struct ScsiReqBlk *i;
2642 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2643 srb->cmd, tag, srb);
2644
2645 if (!(dcb->tag_mask & (1 << tag)))
2646 dprintkl(KERN_DEBUG,
2647 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2648 dcb->tag_mask, tag);
2649
2650 if (list_empty(&dcb->srb_going_list))
2651 goto mingx0;
2652 list_for_each_entry(i, &dcb->srb_going_list, list) {
2653 if (i->tag_number == tag) {
2654 srb = i;
2655 break;
2656 }
2657 }
2658 if (!srb)
2659 goto mingx0;
2660
2661 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2662 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2663 if (dcb->flag & ABORT_DEV_) {
2664 /*srb->state = SRB_ABORT_SENT; */
2665 enable_msgout_abort(acb, srb);
2666 }
2667
2668 if (!(srb->state & SRB_DISCONNECT))
2669 goto mingx0;
2670
2671 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2672 srb->state |= dcb->active_srb->state;
2673 srb->state |= SRB_DATA_XFER;
2674 dcb->active_srb = srb;
2675 /* How can we make the DORS happy? */
2676 return srb;
2677
2678 mingx0:
2679 srb = acb->tmp_srb;
2680 srb->state = SRB_UNEXPECT_RESEL;
2681 dcb->active_srb = srb;
2682 srb->msgout_buf[0] = MSG_ABORT_TAG;
2683 srb->msg_count = 1;
2684 DC395x_ENABLE_MSGOUT;
2685 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2686 return srb;
2687 }
2688
2689
reprogram_regs(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)2690 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2691 struct DeviceCtlBlk *dcb)
2692 {
2693 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2694 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2695 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2696 set_xfer_rate(acb, dcb);
2697 }
2698
2699
2700 /* set async transfer mode */
msgin_set_async(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2701 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2702 {
2703 struct DeviceCtlBlk *dcb = srb->dcb;
2704 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2705 dcb->target_id, dcb->target_lun);
2706
2707 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2708 dcb->sync_mode |= SYNC_NEGO_DONE;
2709 /*dcb->sync_period &= 0; */
2710 dcb->sync_offset = 0;
2711 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2712 srb->state &= ~SRB_DO_SYNC_NEGO;
2713 reprogram_regs(acb, dcb);
2714 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2715 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2716 build_wdtr(acb, dcb, srb);
2717 DC395x_ENABLE_MSGOUT;
2718 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2719 }
2720 }
2721
2722
2723 /* set sync transfer mode */
msgin_set_sync(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2724 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2725 {
2726 struct DeviceCtlBlk *dcb = srb->dcb;
2727 u8 bval;
2728 int fact;
2729 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2730 "(%02i.%01i MHz) Offset %i\n",
2731 dcb->target_id, srb->msgin_buf[3] << 2,
2732 (250 / srb->msgin_buf[3]),
2733 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2734 srb->msgin_buf[4]);
2735
2736 if (srb->msgin_buf[4] > 15)
2737 srb->msgin_buf[4] = 15;
2738 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2739 dcb->sync_offset = 0;
2740 else if (dcb->sync_offset == 0)
2741 dcb->sync_offset = srb->msgin_buf[4];
2742 if (srb->msgin_buf[4] > dcb->sync_offset)
2743 srb->msgin_buf[4] = dcb->sync_offset;
2744 else
2745 dcb->sync_offset = srb->msgin_buf[4];
2746 bval = 0;
2747 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2748 || dcb->min_nego_period >
2749 clock_period[bval]))
2750 bval++;
2751 if (srb->msgin_buf[3] < clock_period[bval])
2752 dprintkl(KERN_INFO,
2753 "msgin_set_sync: Increase sync nego period to %ins\n",
2754 clock_period[bval] << 2);
2755 srb->msgin_buf[3] = clock_period[bval];
2756 dcb->sync_period &= 0xf0;
2757 dcb->sync_period |= ALT_SYNC | bval;
2758 dcb->min_nego_period = srb->msgin_buf[3];
2759
2760 if (dcb->sync_period & WIDE_SYNC)
2761 fact = 500;
2762 else
2763 fact = 250;
2764
2765 dprintkl(KERN_INFO,
2766 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2767 dcb->target_id, (fact == 500) ? "Wide16" : "",
2768 dcb->min_nego_period << 2, dcb->sync_offset,
2769 (fact / dcb->min_nego_period),
2770 ((fact % dcb->min_nego_period) * 10 +
2771 dcb->min_nego_period / 2) / dcb->min_nego_period);
2772
2773 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2774 /* Reply with corrected SDTR Message */
2775 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2776 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2777
2778 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2779 srb->msg_count = 5;
2780 DC395x_ENABLE_MSGOUT;
2781 dcb->sync_mode |= SYNC_NEGO_DONE;
2782 } else {
2783 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2784 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2785 build_wdtr(acb, dcb, srb);
2786 DC395x_ENABLE_MSGOUT;
2787 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2788 }
2789 }
2790 srb->state &= ~SRB_DO_SYNC_NEGO;
2791 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2792
2793 reprogram_regs(acb, dcb);
2794 }
2795
2796
msgin_set_nowide(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2797 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2798 struct ScsiReqBlk *srb)
2799 {
2800 struct DeviceCtlBlk *dcb = srb->dcb;
2801 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2802
2803 dcb->sync_period &= ~WIDE_SYNC;
2804 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2805 dcb->sync_mode |= WIDE_NEGO_DONE;
2806 srb->state &= ~SRB_DO_WIDE_NEGO;
2807 reprogram_regs(acb, dcb);
2808 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2809 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2810 build_sdtr(acb, dcb, srb);
2811 DC395x_ENABLE_MSGOUT;
2812 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2813 }
2814 }
2815
msgin_set_wide(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2816 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2817 {
2818 struct DeviceCtlBlk *dcb = srb->dcb;
2819 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2820 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2821 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2822
2823 if (srb->msgin_buf[3] > wide)
2824 srb->msgin_buf[3] = wide;
2825 /* Completed */
2826 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2827 dprintkl(KERN_DEBUG,
2828 "msgin_set_wide: Wide nego initiated <%02i>\n",
2829 dcb->target_id);
2830 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2831 srb->msg_count = 4;
2832 srb->state |= SRB_DO_WIDE_NEGO;
2833 DC395x_ENABLE_MSGOUT;
2834 }
2835
2836 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2837 if (srb->msgin_buf[3] > 0)
2838 dcb->sync_period |= WIDE_SYNC;
2839 else
2840 dcb->sync_period &= ~WIDE_SYNC;
2841 srb->state &= ~SRB_DO_WIDE_NEGO;
2842 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2843 dprintkdbg(DBG_1,
2844 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2845 (8 << srb->msgin_buf[3]), dcb->target_id);
2846 reprogram_regs(acb, dcb);
2847 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2848 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2849 build_sdtr(acb, dcb, srb);
2850 DC395x_ENABLE_MSGOUT;
2851 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2852 }
2853 }
2854
2855
2856 /*
2857 * extended message codes:
2858 *
2859 * code description
2860 *
2861 * 02h Reserved
2862 * 00h MODIFY DATA POINTER
2863 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2864 * 03h WIDE DATA TRANSFER REQUEST
2865 * 04h - 7Fh Reserved
2866 * 80h - FFh Vendor specific
2867 */
msgin_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2868 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2869 u16 *pscsi_status)
2870 {
2871 struct DeviceCtlBlk *dcb = acb->active_dcb;
2872 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2873
2874 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2875 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2876 /* Now eval the msg */
2877 switch (srb->msgin_buf[0]) {
2878 case DISCONNECT:
2879 srb->state = SRB_DISCONNECT;
2880 break;
2881
2882 case SIMPLE_QUEUE_TAG:
2883 case HEAD_OF_QUEUE_TAG:
2884 case ORDERED_QUEUE_TAG:
2885 srb =
2886 msgin_qtag(acb, dcb,
2887 srb->msgin_buf[1]);
2888 break;
2889
2890 case MESSAGE_REJECT:
2891 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2892 DO_CLRATN | DO_DATALATCH);
2893 /* A sync nego message was rejected ! */
2894 if (srb->state & SRB_DO_SYNC_NEGO) {
2895 msgin_set_async(acb, srb);
2896 break;
2897 }
2898 /* A wide nego message was rejected ! */
2899 if (srb->state & SRB_DO_WIDE_NEGO) {
2900 msgin_set_nowide(acb, srb);
2901 break;
2902 }
2903 enable_msgout_abort(acb, srb);
2904 /*srb->state |= SRB_ABORT_SENT */
2905 break;
2906
2907 case EXTENDED_MESSAGE:
2908 /* SDTR */
2909 if (srb->msgin_buf[1] == 3
2910 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2911 msgin_set_sync(acb, srb);
2912 break;
2913 }
2914 /* WDTR */
2915 if (srb->msgin_buf[1] == 2
2916 && srb->msgin_buf[2] == EXTENDED_WDTR
2917 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2918 msgin_set_wide(acb, srb);
2919 break;
2920 }
2921 msgin_reject(acb, srb);
2922 break;
2923
2924 case MSG_IGNOREWIDE:
2925 /* Discard wide residual */
2926 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2927 break;
2928
2929 case COMMAND_COMPLETE:
2930 /* nothing has to be done */
2931 break;
2932
2933 case SAVE_POINTERS:
2934 /*
2935 * SAVE POINTER may be ignored as we have the struct
2936 * ScsiReqBlk* associated with the scsi command.
2937 */
2938 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2939 "SAVE POINTER rem=%i Ignore\n",
2940 srb->cmd, srb->total_xfer_length);
2941 break;
2942
2943 case RESTORE_POINTERS:
2944 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2945 break;
2946
2947 case ABORT:
2948 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2949 "<%02i-%i> ABORT msg\n",
2950 srb->cmd, dcb->target_id,
2951 dcb->target_lun);
2952 dcb->flag |= ABORT_DEV_;
2953 enable_msgout_abort(acb, srb);
2954 break;
2955
2956 default:
2957 /* reject unknown messages */
2958 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2959 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2960 srb->msg_count = 1;
2961 srb->msgout_buf[0] = dcb->identify_msg;
2962 DC395x_ENABLE_MSGOUT;
2963 srb->state |= SRB_MSGOUT;
2964 /*break; */
2965 }
2966 msgin_reject(acb, srb);
2967 }
2968
2969 /* Clear counter and MsgIn state */
2970 srb->state &= ~SRB_MSGIN;
2971 acb->msg_len = 0;
2972 }
2973 *pscsi_status = PH_BUS_FREE;
2974 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2975 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2976 }
2977
2978
msgin_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2979 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2980 u16 *pscsi_status)
2981 {
2982 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2983 clear_fifo(acb, "msgin_phase1");
2984 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2985 if (!(srb->state & SRB_MSGIN)) {
2986 srb->state &= ~SRB_DISCONNECT;
2987 srb->state |= SRB_MSGIN;
2988 }
2989 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2990 /* SCSI command */
2991 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2992 }
2993
2994
nop0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2995 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2996 u16 *pscsi_status)
2997 {
2998 }
2999
3000
nop1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)3001 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3002 u16 *pscsi_status)
3003 {
3004 }
3005
3006
set_xfer_rate(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3007 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3008 {
3009 struct DeviceCtlBlk *i;
3010
3011 /* set all lun device's period, offset */
3012 if (dcb->identify_msg & 0x07)
3013 return;
3014
3015 if (acb->scan_devices) {
3016 current_sync_offset = dcb->sync_offset;
3017 return;
3018 }
3019
3020 list_for_each_entry(i, &acb->dcb_list, list)
3021 if (i->target_id == dcb->target_id) {
3022 i->sync_period = dcb->sync_period;
3023 i->sync_offset = dcb->sync_offset;
3024 i->sync_mode = dcb->sync_mode;
3025 i->min_nego_period = dcb->min_nego_period;
3026 }
3027 }
3028
3029
disconnect(struct AdapterCtlBlk * acb)3030 static void disconnect(struct AdapterCtlBlk *acb)
3031 {
3032 struct DeviceCtlBlk *dcb = acb->active_dcb;
3033 struct ScsiReqBlk *srb;
3034
3035 if (!dcb) {
3036 dprintkl(KERN_ERR, "disconnect: No such device\n");
3037 udelay(500);
3038 /* Suspend queue for a while */
3039 acb->last_reset =
3040 jiffies + HZ / 2 +
3041 HZ * acb->eeprom.delay_time;
3042 clear_fifo(acb, "disconnectEx");
3043 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3044 return;
3045 }
3046 srb = dcb->active_srb;
3047 acb->active_dcb = NULL;
3048 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
3049
3050 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3051 clear_fifo(acb, "disconnect");
3052 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3053 if (srb->state & SRB_UNEXPECT_RESEL) {
3054 dprintkl(KERN_ERR,
3055 "disconnect: Unexpected reselection <%02i-%i>\n",
3056 dcb->target_id, dcb->target_lun);
3057 srb->state = 0;
3058 waiting_process_next(acb);
3059 } else if (srb->state & SRB_ABORT_SENT) {
3060 dcb->flag &= ~ABORT_DEV_;
3061 acb->last_reset = jiffies + HZ / 2 + 1;
3062 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3063 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3064 waiting_process_next(acb);
3065 } else {
3066 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3067 || !(srb->
3068 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3069 /*
3070 * Selection time out
3071 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3072 */
3073 /* Unexp. Disc / Sel Timeout */
3074 if (srb->state != SRB_START_
3075 && srb->state != SRB_MSGOUT) {
3076 srb->state = SRB_READY;
3077 dprintkl(KERN_DEBUG,
3078 "disconnect: (0x%p) Unexpected\n",
3079 srb->cmd);
3080 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3081 goto disc1;
3082 } else {
3083 /* Normal selection timeout */
3084 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
3085 "<%02i-%i> SelTO\n", srb->cmd,
3086 dcb->target_id, dcb->target_lun);
3087 if (srb->retry_count++ > DC395x_MAX_RETRIES
3088 || acb->scan_devices) {
3089 srb->target_status =
3090 SCSI_STAT_SEL_TIMEOUT;
3091 goto disc1;
3092 }
3093 free_tag(dcb, srb);
3094 srb_going_to_waiting_move(dcb, srb);
3095 dprintkdbg(DBG_KG,
3096 "disconnect: (0x%p) Retry\n",
3097 srb->cmd);
3098 waiting_set_timer(acb, HZ / 20);
3099 }
3100 } else if (srb->state & SRB_DISCONNECT) {
3101 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3102 /*
3103 * SRB_DISCONNECT (This is what we expect!)
3104 */
3105 if (bval & 0x40) {
3106 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3107 " 0x%02x: ACK set! Other controllers?\n",
3108 bval);
3109 /* It could come from another initiator, therefore don't do much ! */
3110 } else
3111 waiting_process_next(acb);
3112 } else if (srb->state & SRB_COMPLETED) {
3113 disc1:
3114 /*
3115 ** SRB_COMPLETED
3116 */
3117 free_tag(dcb, srb);
3118 dcb->active_srb = NULL;
3119 srb->state = SRB_FREE;
3120 srb_done(acb, dcb, srb);
3121 }
3122 }
3123 }
3124
3125
reselect(struct AdapterCtlBlk * acb)3126 static void reselect(struct AdapterCtlBlk *acb)
3127 {
3128 struct DeviceCtlBlk *dcb = acb->active_dcb;
3129 struct ScsiReqBlk *srb = NULL;
3130 u16 rsel_tar_lun_id;
3131 u8 id, lun;
3132 u8 arblostflag = 0;
3133 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3134
3135 clear_fifo(acb, "reselect");
3136 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3137 /* Read Reselected Target ID and LUN */
3138 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3139 if (dcb) { /* Arbitration lost but Reselection win */
3140 srb = dcb->active_srb;
3141 if (!srb) {
3142 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3143 "but active_srb == NULL\n");
3144 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3145 return;
3146 }
3147 /* Why the if ? */
3148 if (!acb->scan_devices) {
3149 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3150 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3151 srb->cmd, dcb->target_id,
3152 dcb->target_lun, rsel_tar_lun_id,
3153 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3154 arblostflag = 1;
3155 /*srb->state |= SRB_DISCONNECT; */
3156
3157 srb->state = SRB_READY;
3158 free_tag(dcb, srb);
3159 srb_going_to_waiting_move(dcb, srb);
3160 waiting_set_timer(acb, HZ / 20);
3161
3162 /* return; */
3163 }
3164 }
3165 /* Read Reselected Target Id and LUN */
3166 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3167 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3168 "Got %i!\n", rsel_tar_lun_id);
3169 id = rsel_tar_lun_id & 0xff;
3170 lun = (rsel_tar_lun_id >> 8) & 7;
3171 dcb = find_dcb(acb, id, lun);
3172 if (!dcb) {
3173 dprintkl(KERN_ERR, "reselect: From non existent device "
3174 "<%02i-%i>\n", id, lun);
3175 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3176 return;
3177 }
3178 acb->active_dcb = dcb;
3179
3180 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3181 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3182 "disconnection? <%02i-%i>\n",
3183 dcb->target_id, dcb->target_lun);
3184
3185 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3186 srb = acb->tmp_srb;
3187 dcb->active_srb = srb;
3188 } else {
3189 /* There can be only one! */
3190 srb = dcb->active_srb;
3191 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3192 /*
3193 * abort command
3194 */
3195 dprintkl(KERN_DEBUG,
3196 "reselect: w/o disconnected cmds <%02i-%i>\n",
3197 dcb->target_id, dcb->target_lun);
3198 srb = acb->tmp_srb;
3199 srb->state = SRB_UNEXPECT_RESEL;
3200 dcb->active_srb = srb;
3201 enable_msgout_abort(acb, srb);
3202 } else {
3203 if (dcb->flag & ABORT_DEV_) {
3204 /*srb->state = SRB_ABORT_SENT; */
3205 enable_msgout_abort(acb, srb);
3206 } else
3207 srb->state = SRB_DATA_XFER;
3208
3209 }
3210 }
3211 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3212
3213 /* Program HA ID, target ID, period and offset */
3214 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3215 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3216 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3217 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3218 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3219 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3220 /* SCSI command */
3221 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3222 }
3223
3224
tagq_blacklist(char * name)3225 static inline u8 tagq_blacklist(char *name)
3226 {
3227 #ifndef DC395x_NO_TAGQ
3228 #if 0
3229 u8 i;
3230 for (i = 0; i < BADDEVCNT; i++)
3231 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3232 return 1;
3233 #endif
3234 return 0;
3235 #else
3236 return 1;
3237 #endif
3238 }
3239
3240
disc_tagq_set(struct DeviceCtlBlk * dcb,struct ScsiInqData * ptr)3241 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3242 {
3243 /* Check for SCSI format (ANSI and Response data format) */
3244 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3245 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3246 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3247 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3248 /* ((dcb->dev_type == TYPE_DISK)
3249 || (dcb->dev_type == TYPE_MOD)) && */
3250 !tagq_blacklist(((char *)ptr) + 8)) {
3251 if (dcb->max_command == 1)
3252 dcb->max_command =
3253 dcb->acb->tag_max_num;
3254 dcb->sync_mode |= EN_TAG_QUEUEING;
3255 /*dcb->tag_mask = 0; */
3256 } else
3257 dcb->max_command = 1;
3258 }
3259 }
3260
3261
add_dev(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiInqData * ptr)3262 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3263 struct ScsiInqData *ptr)
3264 {
3265 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3266 dcb->dev_type = bval1;
3267 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3268 disc_tagq_set(dcb, ptr);
3269 }
3270
3271
3272 /* unmap mapped pci regions from SRB */
pci_unmap_srb(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)3273 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3274 {
3275 struct scsi_cmnd *cmd = srb->cmd;
3276 enum dma_data_direction dir = cmd->sc_data_direction;
3277
3278 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3279 /* unmap DC395x SG list */
3280 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3281 srb->sg_bus_addr, SEGMENTX_LEN);
3282 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3283 SEGMENTX_LEN,
3284 PCI_DMA_TODEVICE);
3285 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3286 scsi_sg_count(cmd), scsi_bufflen(cmd));
3287 /* unmap the sg segments */
3288 scsi_dma_unmap(cmd);
3289 }
3290 }
3291
3292
3293 /* unmap mapped pci sense buffer from SRB */
pci_unmap_srb_sense(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)3294 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3295 struct ScsiReqBlk *srb)
3296 {
3297 if (!(srb->flag & AUTO_REQSENSE))
3298 return;
3299 /* Unmap sense buffer */
3300 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3301 srb->segment_x[0].address);
3302 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3303 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3304 /* Restore SG stuff */
3305 srb->total_xfer_length = srb->xferred;
3306 srb->segment_x[0].address =
3307 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3308 srb->segment_x[0].length =
3309 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3310 }
3311
3312
3313 /*
3314 * Complete execution of a SCSI command
3315 * Signal completion to the generic SCSI driver
3316 */
srb_done(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)3317 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3318 struct ScsiReqBlk *srb)
3319 {
3320 u8 tempcnt, status;
3321 struct scsi_cmnd *cmd = srb->cmd;
3322 enum dma_data_direction dir = cmd->sc_data_direction;
3323 int ckc_only = 1;
3324
3325 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3326 srb->cmd->device->id, (u8)srb->cmd->device->lun);
3327 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3328 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3329 scsi_sgtalbe(cmd));
3330 status = srb->target_status;
3331 if (srb->flag & AUTO_REQSENSE) {
3332 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3333 pci_unmap_srb_sense(acb, srb);
3334 /*
3335 ** target status..........................
3336 */
3337 srb->flag &= ~AUTO_REQSENSE;
3338 srb->adapter_status = 0;
3339 srb->target_status = CHECK_CONDITION << 1;
3340 if (debug_enabled(DBG_1)) {
3341 switch (cmd->sense_buffer[2] & 0x0f) {
3342 case NOT_READY:
3343 dprintkl(KERN_DEBUG,
3344 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3345 cmd->cmnd[0], dcb->target_id,
3346 dcb->target_lun, status, acb->scan_devices);
3347 break;
3348 case UNIT_ATTENTION:
3349 dprintkl(KERN_DEBUG,
3350 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3351 cmd->cmnd[0], dcb->target_id,
3352 dcb->target_lun, status, acb->scan_devices);
3353 break;
3354 case ILLEGAL_REQUEST:
3355 dprintkl(KERN_DEBUG,
3356 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3357 cmd->cmnd[0], dcb->target_id,
3358 dcb->target_lun, status, acb->scan_devices);
3359 break;
3360 case MEDIUM_ERROR:
3361 dprintkl(KERN_DEBUG,
3362 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3363 cmd->cmnd[0], dcb->target_id,
3364 dcb->target_lun, status, acb->scan_devices);
3365 break;
3366 case HARDWARE_ERROR:
3367 dprintkl(KERN_DEBUG,
3368 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3369 cmd->cmnd[0], dcb->target_id,
3370 dcb->target_lun, status, acb->scan_devices);
3371 break;
3372 }
3373 if (cmd->sense_buffer[7] >= 6)
3374 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3375 "(0x%08x 0x%08x)\n",
3376 cmd->sense_buffer[2], cmd->sense_buffer[12],
3377 cmd->sense_buffer[13],
3378 *((unsigned int *)(cmd->sense_buffer + 3)),
3379 *((unsigned int *)(cmd->sense_buffer + 8)));
3380 else
3381 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3382 cmd->sense_buffer[2],
3383 *((unsigned int *)(cmd->sense_buffer + 3)));
3384 }
3385
3386 if (status == (CHECK_CONDITION << 1)) {
3387 cmd->result = DID_BAD_TARGET << 16;
3388 goto ckc_e;
3389 }
3390 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3391
3392 if (srb->total_xfer_length
3393 && srb->total_xfer_length >= cmd->underflow)
3394 cmd->result =
3395 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3396 srb->end_message, CHECK_CONDITION);
3397 /*SET_RES_DID(cmd->result,DID_OK) */
3398 else
3399 cmd->result =
3400 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3401 srb->end_message, CHECK_CONDITION);
3402
3403 goto ckc_e;
3404 }
3405
3406 /*************************************************************/
3407 if (status) {
3408 /*
3409 * target status..........................
3410 */
3411 if (status_byte(status) == CHECK_CONDITION) {
3412 request_sense(acb, dcb, srb);
3413 return;
3414 } else if (status_byte(status) == QUEUE_FULL) {
3415 tempcnt = (u8)list_size(&dcb->srb_going_list);
3416 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3417 dcb->target_id, dcb->target_lun, tempcnt);
3418 if (tempcnt > 1)
3419 tempcnt--;
3420 dcb->max_command = tempcnt;
3421 free_tag(dcb, srb);
3422 srb_going_to_waiting_move(dcb, srb);
3423 waiting_set_timer(acb, HZ / 20);
3424 srb->adapter_status = 0;
3425 srb->target_status = 0;
3426 return;
3427 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3428 srb->adapter_status = H_SEL_TIMEOUT;
3429 srb->target_status = 0;
3430 cmd->result = DID_NO_CONNECT << 16;
3431 } else {
3432 srb->adapter_status = 0;
3433 SET_RES_DID(cmd->result, DID_ERROR);
3434 SET_RES_MSG(cmd->result, srb->end_message);
3435 SET_RES_TARGET(cmd->result, status);
3436
3437 }
3438 } else {
3439 /*
3440 ** process initiator status..........................
3441 */
3442 status = srb->adapter_status;
3443 if (status & H_OVER_UNDER_RUN) {
3444 srb->target_status = 0;
3445 SET_RES_DID(cmd->result, DID_OK);
3446 SET_RES_MSG(cmd->result, srb->end_message);
3447 } else if (srb->status & PARITY_ERROR) {
3448 SET_RES_DID(cmd->result, DID_PARITY);
3449 SET_RES_MSG(cmd->result, srb->end_message);
3450 } else { /* No error */
3451
3452 srb->adapter_status = 0;
3453 srb->target_status = 0;
3454 SET_RES_DID(cmd->result, DID_OK);
3455 }
3456 }
3457
3458 ckc_only = 0;
3459 /* Check Error Conditions */
3460 ckc_e:
3461
3462 pci_unmap_srb(acb, srb);
3463
3464 if (cmd->cmnd[0] == INQUIRY) {
3465 unsigned char *base = NULL;
3466 struct ScsiInqData *ptr;
3467 unsigned long flags = 0;
3468 struct scatterlist* sg = scsi_sglist(cmd);
3469 size_t offset = 0, len = sizeof(struct ScsiInqData);
3470
3471 local_irq_save(flags);
3472 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3473 ptr = (struct ScsiInqData *)(base + offset);
3474
3475 if (!ckc_only && (cmd->result & RES_DID) == 0
3476 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3477 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3478 dcb->inquiry7 = ptr->Flags;
3479
3480 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3481 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3482 if ((cmd->result == (DID_OK << 16)
3483 || status_byte(cmd->result) &
3484 CHECK_CONDITION)) {
3485 if (!dcb->init_tcq_flag) {
3486 add_dev(acb, dcb, ptr);
3487 dcb->init_tcq_flag = 1;
3488 }
3489 }
3490
3491 scsi_kunmap_atomic_sg(base);
3492 local_irq_restore(flags);
3493 }
3494
3495 /* Here is the info for Doug Gilbert's sg3 ... */
3496 scsi_set_resid(cmd, srb->total_xfer_length);
3497 /* This may be interpreted by sb. or not ... */
3498 cmd->SCp.this_residual = srb->total_xfer_length;
3499 cmd->SCp.buffers_residual = 0;
3500 if (debug_enabled(DBG_KG)) {
3501 if (srb->total_xfer_length)
3502 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3503 "cmnd=0x%02x Missed %i bytes\n",
3504 cmd, cmd->device->id, (u8)cmd->device->lun,
3505 cmd->cmnd[0], srb->total_xfer_length);
3506 }
3507
3508 srb_going_remove(dcb, srb);
3509 /* Add to free list */
3510 if (srb == acb->tmp_srb)
3511 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3512 else {
3513 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3514 cmd, cmd->result);
3515 srb_free_insert(acb, srb);
3516 }
3517
3518 cmd->scsi_done(cmd);
3519 waiting_process_next(acb);
3520 }
3521
3522
3523 /* abort all cmds in our queues */
doing_srb_done(struct AdapterCtlBlk * acb,u8 did_flag,struct scsi_cmnd * cmd,u8 force)3524 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3525 struct scsi_cmnd *cmd, u8 force)
3526 {
3527 struct DeviceCtlBlk *dcb;
3528 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3529
3530 list_for_each_entry(dcb, &acb->dcb_list, list) {
3531 struct ScsiReqBlk *srb;
3532 struct ScsiReqBlk *tmp;
3533 struct scsi_cmnd *p;
3534
3535 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3536 enum dma_data_direction dir;
3537 int result;
3538
3539 p = srb->cmd;
3540 dir = p->sc_data_direction;
3541 result = MK_RES(0, did_flag, 0, 0);
3542 printk("G:%p(%02i-%i) ", p,
3543 p->device->id, (u8)p->device->lun);
3544 srb_going_remove(dcb, srb);
3545 free_tag(dcb, srb);
3546 srb_free_insert(acb, srb);
3547 p->result = result;
3548 pci_unmap_srb_sense(acb, srb);
3549 pci_unmap_srb(acb, srb);
3550 if (force) {
3551 /* For new EH, we normally don't need to give commands back,
3552 * as they all complete or all time out */
3553 p->scsi_done(p);
3554 }
3555 }
3556 if (!list_empty(&dcb->srb_going_list))
3557 dprintkl(KERN_DEBUG,
3558 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3559 dcb->target_id, dcb->target_lun);
3560 if (dcb->tag_mask)
3561 dprintkl(KERN_DEBUG,
3562 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3563 dcb->target_id, dcb->target_lun,
3564 dcb->tag_mask);
3565
3566 /* Waiting queue */
3567 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3568 int result;
3569 p = srb->cmd;
3570
3571 result = MK_RES(0, did_flag, 0, 0);
3572 printk("W:%p<%02i-%i>", p, p->device->id,
3573 (u8)p->device->lun);
3574 srb_waiting_remove(dcb, srb);
3575 srb_free_insert(acb, srb);
3576 p->result = result;
3577 pci_unmap_srb_sense(acb, srb);
3578 pci_unmap_srb(acb, srb);
3579 if (force) {
3580 /* For new EH, we normally don't need to give commands back,
3581 * as they all complete or all time out */
3582 cmd->scsi_done(cmd);
3583 }
3584 }
3585 if (!list_empty(&dcb->srb_waiting_list))
3586 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3587 list_size(&dcb->srb_waiting_list), dcb->target_id,
3588 dcb->target_lun);
3589 dcb->flag &= ~ABORT_DEV_;
3590 }
3591 printk("\n");
3592 }
3593
3594
reset_scsi_bus(struct AdapterCtlBlk * acb)3595 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3596 {
3597 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3598 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3599 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3600
3601 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3602 /* nothing */;
3603 }
3604
3605
set_basic_config(struct AdapterCtlBlk * acb)3606 static void set_basic_config(struct AdapterCtlBlk *acb)
3607 {
3608 u8 bval;
3609 u16 wval;
3610 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3611 if (acb->config & HCC_PARITY)
3612 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3613 else
3614 bval = PHASELATCH | INITIATOR | BLOCKRST;
3615
3616 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3617
3618 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3619 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3620 /* program Host ID */
3621 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3622 /* set ansynchronous transfer */
3623 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3624 /* Turn LED control off */
3625 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3626 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3627 /* DMA config */
3628 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3629 wval |=
3630 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3631 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3632 /* Clear pending interrupt status */
3633 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3634 /* Enable SCSI interrupt */
3635 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3636 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3637 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3638 );
3639 }
3640
3641
scsi_reset_detect(struct AdapterCtlBlk * acb)3642 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3643 {
3644 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3645 /* delay half a second */
3646 if (timer_pending(&acb->waiting_timer))
3647 del_timer(&acb->waiting_timer);
3648
3649 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3650 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3651 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3652 udelay(500);
3653 /* Maybe we locked up the bus? Then lets wait even longer ... */
3654 acb->last_reset =
3655 jiffies + 5 * HZ / 2 +
3656 HZ * acb->eeprom.delay_time;
3657
3658 clear_fifo(acb, "scsi_reset_detect");
3659 set_basic_config(acb);
3660 /*1.25 */
3661 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3662
3663 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3664 acb->acb_flag |= RESET_DONE;
3665 } else {
3666 acb->acb_flag |= RESET_DETECT;
3667 reset_dev_param(acb);
3668 doing_srb_done(acb, DID_RESET, NULL, 1);
3669 /*DC395x_RecoverSRB( acb ); */
3670 acb->active_dcb = NULL;
3671 acb->acb_flag = 0;
3672 waiting_process_next(acb);
3673 }
3674 }
3675
3676
request_sense(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)3677 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3678 struct ScsiReqBlk *srb)
3679 {
3680 struct scsi_cmnd *cmd = srb->cmd;
3681 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3682 cmd, cmd->device->id, (u8)cmd->device->lun);
3683
3684 srb->flag |= AUTO_REQSENSE;
3685 srb->adapter_status = 0;
3686 srb->target_status = 0;
3687
3688 /* KG: Can this prevent crap sense data ? */
3689 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3690
3691 /* Save some data */
3692 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3693 srb->segment_x[0].address;
3694 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3695 srb->segment_x[0].length;
3696 srb->xferred = srb->total_xfer_length;
3697 /* srb->segment_x : a one entry of S/G list table */
3698 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3699 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3700 /* Map sense buffer */
3701 srb->segment_x[0].address =
3702 pci_map_single(acb->dev, cmd->sense_buffer,
3703 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3704 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3705 cmd->sense_buffer, srb->segment_x[0].address,
3706 SCSI_SENSE_BUFFERSIZE);
3707 srb->sg_count = 1;
3708 srb->sg_index = 0;
3709
3710 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3711 dprintkl(KERN_DEBUG,
3712 "request_sense: (0x%p) failed <%02i-%i>\n",
3713 srb->cmd, dcb->target_id, dcb->target_lun);
3714 srb_going_to_waiting_move(dcb, srb);
3715 waiting_set_timer(acb, HZ / 100);
3716 }
3717 }
3718
3719
3720 /**
3721 * device_alloc - Allocate a new device instance. This create the
3722 * devices instance and sets up all the data items. The adapter
3723 * instance is required to obtain confiuration information for this
3724 * device. This does *not* add this device to the adapters device
3725 * list.
3726 *
3727 * @acb: The adapter to obtain configuration information from.
3728 * @target: The target for the new device.
3729 * @lun: The lun for the new device.
3730 *
3731 * Return the new device if successful or NULL on failure.
3732 **/
device_alloc(struct AdapterCtlBlk * acb,u8 target,u8 lun)3733 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3734 u8 target, u8 lun)
3735 {
3736 struct NvRamType *eeprom = &acb->eeprom;
3737 u8 period_index = eeprom->target[target].period & 0x07;
3738 struct DeviceCtlBlk *dcb;
3739
3740 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3741 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3742 if (!dcb)
3743 return NULL;
3744 dcb->acb = NULL;
3745 INIT_LIST_HEAD(&dcb->srb_going_list);
3746 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3747 dcb->active_srb = NULL;
3748 dcb->tag_mask = 0;
3749 dcb->max_command = 1;
3750 dcb->target_id = target;
3751 dcb->target_lun = lun;
3752 dcb->dev_mode = eeprom->target[target].cfg0;
3753 #ifndef DC395x_NO_DISCONNECT
3754 dcb->identify_msg =
3755 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3756 #else
3757 dcb->identify_msg = IDENTIFY(0, lun);
3758 #endif
3759 dcb->inquiry7 = 0;
3760 dcb->sync_mode = 0;
3761 dcb->min_nego_period = clock_period[period_index];
3762 dcb->sync_period = 0;
3763 dcb->sync_offset = 0;
3764 dcb->flag = 0;
3765
3766 #ifndef DC395x_NO_WIDE
3767 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3768 && (acb->config & HCC_WIDE_CARD))
3769 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3770 #endif
3771 #ifndef DC395x_NO_SYNC
3772 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3773 if (!(lun) || current_sync_offset)
3774 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3775 #endif
3776 if (dcb->target_lun != 0) {
3777 /* Copy settings */
3778 struct DeviceCtlBlk *p;
3779 list_for_each_entry(p, &acb->dcb_list, list)
3780 if (p->target_id == dcb->target_id)
3781 break;
3782 dprintkdbg(DBG_1,
3783 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3784 dcb->target_id, dcb->target_lun,
3785 p->target_id, p->target_lun);
3786 dcb->sync_mode = p->sync_mode;
3787 dcb->sync_period = p->sync_period;
3788 dcb->min_nego_period = p->min_nego_period;
3789 dcb->sync_offset = p->sync_offset;
3790 dcb->inquiry7 = p->inquiry7;
3791 }
3792 return dcb;
3793 }
3794
3795
3796 /**
3797 * adapter_add_device - Adds the device instance to the adaptor instance.
3798 *
3799 * @acb: The adapter device to be updated
3800 * @dcb: A newly created and initialised device instance to add.
3801 **/
adapter_add_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3802 static void adapter_add_device(struct AdapterCtlBlk *acb,
3803 struct DeviceCtlBlk *dcb)
3804 {
3805 /* backpointer to adapter */
3806 dcb->acb = acb;
3807
3808 /* set run_robin to this device if it is currently empty */
3809 if (list_empty(&acb->dcb_list))
3810 acb->dcb_run_robin = dcb;
3811
3812 /* add device to list */
3813 list_add_tail(&dcb->list, &acb->dcb_list);
3814
3815 /* update device maps */
3816 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3817 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3818 }
3819
3820
3821 /**
3822 * adapter_remove_device - Removes the device instance from the adaptor
3823 * instance. The device instance is not check in any way or freed by this.
3824 * The caller is expected to take care of that. This will simply remove the
3825 * device from the adapters data strcutures.
3826 *
3827 * @acb: The adapter device to be updated
3828 * @dcb: A device that has previously been added to the adapter.
3829 **/
adapter_remove_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3830 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3831 struct DeviceCtlBlk *dcb)
3832 {
3833 struct DeviceCtlBlk *i;
3834 struct DeviceCtlBlk *tmp;
3835 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3836 dcb->target_id, dcb->target_lun);
3837
3838 /* fix up any pointers to this device that we have in the adapter */
3839 if (acb->active_dcb == dcb)
3840 acb->active_dcb = NULL;
3841 if (acb->dcb_run_robin == dcb)
3842 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3843
3844 /* unlink from list */
3845 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3846 if (dcb == i) {
3847 list_del(&i->list);
3848 break;
3849 }
3850
3851 /* clear map and children */
3852 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3853 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3854 dcb->acb = NULL;
3855 }
3856
3857
3858 /**
3859 * adapter_remove_and_free_device - Removes a single device from the adapter
3860 * and then frees the device information.
3861 *
3862 * @acb: The adapter device to be updated
3863 * @dcb: A device that has previously been added to the adapter.
3864 */
adapter_remove_and_free_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3865 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3866 struct DeviceCtlBlk *dcb)
3867 {
3868 if (list_size(&dcb->srb_going_list) > 1) {
3869 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3870 "Won't remove because of %i active requests.\n",
3871 dcb->target_id, dcb->target_lun,
3872 list_size(&dcb->srb_going_list));
3873 return;
3874 }
3875 adapter_remove_device(acb, dcb);
3876 kfree(dcb);
3877 }
3878
3879
3880 /**
3881 * adapter_remove_and_free_all_devices - Removes and frees all of the
3882 * devices associated with the specified adapter.
3883 *
3884 * @acb: The adapter from which all devices should be removed.
3885 **/
adapter_remove_and_free_all_devices(struct AdapterCtlBlk * acb)3886 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3887 {
3888 struct DeviceCtlBlk *dcb;
3889 struct DeviceCtlBlk *tmp;
3890 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3891 list_size(&acb->dcb_list));
3892
3893 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3894 adapter_remove_and_free_device(acb, dcb);
3895 }
3896
3897
3898 /**
3899 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3900 * scsi device that we need to deal with. We allocate a new device and then
3901 * insert that device into the adapters device list.
3902 *
3903 * @scsi_device: The new scsi device that we need to handle.
3904 **/
dc395x_slave_alloc(struct scsi_device * scsi_device)3905 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3906 {
3907 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3908 struct DeviceCtlBlk *dcb;
3909
3910 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3911 if (!dcb)
3912 return -ENOMEM;
3913 adapter_add_device(acb, dcb);
3914
3915 return 0;
3916 }
3917
3918
3919 /**
3920 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3921 * device that is going away.
3922 *
3923 * @scsi_device: The new scsi device that we need to handle.
3924 **/
dc395x_slave_destroy(struct scsi_device * scsi_device)3925 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3926 {
3927 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3928 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3929 if (dcb)
3930 adapter_remove_and_free_device(acb, dcb);
3931 }
3932
3933
3934
3935
3936 /**
3937 * trms1040_wait_30us: wait for 30 us
3938 *
3939 * Waits for 30us (using the chip by the looks of it..)
3940 *
3941 * @io_port: base I/O address
3942 **/
trms1040_wait_30us(unsigned long io_port)3943 static void trms1040_wait_30us(unsigned long io_port)
3944 {
3945 /* ScsiPortStallExecution(30); wait 30 us */
3946 outb(5, io_port + TRM_S1040_GEN_TIMER);
3947 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3948 /* nothing */ ;
3949 }
3950
3951
3952 /**
3953 * trms1040_write_cmd - write the secified command and address to
3954 * chip
3955 *
3956 * @io_port: base I/O address
3957 * @cmd: SB + op code (command) to send
3958 * @addr: address to send
3959 **/
trms1040_write_cmd(unsigned long io_port,u8 cmd,u8 addr)3960 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3961 {
3962 int i;
3963 u8 send_data;
3964
3965 /* program SB + OP code */
3966 for (i = 0; i < 3; i++, cmd <<= 1) {
3967 send_data = NVR_SELECT;
3968 if (cmd & 0x04) /* Start from bit 2 */
3969 send_data |= NVR_BITOUT;
3970
3971 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3972 trms1040_wait_30us(io_port);
3973 outb((send_data | NVR_CLOCK),
3974 io_port + TRM_S1040_GEN_NVRAM);
3975 trms1040_wait_30us(io_port);
3976 }
3977
3978 /* send address */
3979 for (i = 0; i < 7; i++, addr <<= 1) {
3980 send_data = NVR_SELECT;
3981 if (addr & 0x40) /* Start from bit 6 */
3982 send_data |= NVR_BITOUT;
3983
3984 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3985 trms1040_wait_30us(io_port);
3986 outb((send_data | NVR_CLOCK),
3987 io_port + TRM_S1040_GEN_NVRAM);
3988 trms1040_wait_30us(io_port);
3989 }
3990 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3991 trms1040_wait_30us(io_port);
3992 }
3993
3994
3995 /**
3996 * trms1040_set_data - store a single byte in the eeprom
3997 *
3998 * Called from write all to write a single byte into the SSEEPROM
3999 * Which is done one bit at a time.
4000 *
4001 * @io_port: base I/O address
4002 * @addr: offset into EEPROM
4003 * @byte: bytes to write
4004 **/
trms1040_set_data(unsigned long io_port,u8 addr,u8 byte)4005 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4006 {
4007 int i;
4008 u8 send_data;
4009
4010 /* Send write command & address */
4011 trms1040_write_cmd(io_port, 0x05, addr);
4012
4013 /* Write data */
4014 for (i = 0; i < 8; i++, byte <<= 1) {
4015 send_data = NVR_SELECT;
4016 if (byte & 0x80) /* Start from bit 7 */
4017 send_data |= NVR_BITOUT;
4018
4019 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4020 trms1040_wait_30us(io_port);
4021 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4022 trms1040_wait_30us(io_port);
4023 }
4024 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4025 trms1040_wait_30us(io_port);
4026
4027 /* Disable chip select */
4028 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4029 trms1040_wait_30us(io_port);
4030
4031 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4032 trms1040_wait_30us(io_port);
4033
4034 /* Wait for write ready */
4035 while (1) {
4036 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4037 trms1040_wait_30us(io_port);
4038
4039 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4040 trms1040_wait_30us(io_port);
4041
4042 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4043 break;
4044 }
4045
4046 /* Disable chip select */
4047 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4048 }
4049
4050
4051 /**
4052 * trms1040_write_all - write 128 bytes to the eeprom
4053 *
4054 * Write the supplied 128 bytes to the chips SEEPROM
4055 *
4056 * @eeprom: the data to write
4057 * @io_port: the base io port
4058 **/
trms1040_write_all(struct NvRamType * eeprom,unsigned long io_port)4059 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4060 {
4061 u8 *b_eeprom = (u8 *)eeprom;
4062 u8 addr;
4063
4064 /* Enable SEEPROM */
4065 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4066 io_port + TRM_S1040_GEN_CONTROL);
4067
4068 /* write enable */
4069 trms1040_write_cmd(io_port, 0x04, 0xFF);
4070 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4071 trms1040_wait_30us(io_port);
4072
4073 /* write */
4074 for (addr = 0; addr < 128; addr++, b_eeprom++)
4075 trms1040_set_data(io_port, addr, *b_eeprom);
4076
4077 /* write disable */
4078 trms1040_write_cmd(io_port, 0x04, 0x00);
4079 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4080 trms1040_wait_30us(io_port);
4081
4082 /* Disable SEEPROM */
4083 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4084 io_port + TRM_S1040_GEN_CONTROL);
4085 }
4086
4087
4088 /**
4089 * trms1040_get_data - get a single byte from the eeprom
4090 *
4091 * Called from read all to read a single byte into the SSEEPROM
4092 * Which is done one bit at a time.
4093 *
4094 * @io_port: base I/O address
4095 * @addr: offset into SEEPROM
4096 *
4097 * Returns the byte read.
4098 **/
trms1040_get_data(unsigned long io_port,u8 addr)4099 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
4100 {
4101 int i;
4102 u8 read_byte;
4103 u8 result = 0;
4104
4105 /* Send read command & address */
4106 trms1040_write_cmd(io_port, 0x06, addr);
4107
4108 /* read data */
4109 for (i = 0; i < 8; i++) {
4110 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4111 trms1040_wait_30us(io_port);
4112 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4113
4114 /* Get data bit while falling edge */
4115 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4116 result <<= 1;
4117 if (read_byte & NVR_BITIN)
4118 result |= 1;
4119
4120 trms1040_wait_30us(io_port);
4121 }
4122
4123 /* Disable chip select */
4124 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4125 return result;
4126 }
4127
4128
4129 /**
4130 * trms1040_read_all - read all bytes from the eeprom
4131 *
4132 * Read the 128 bytes from the SEEPROM.
4133 *
4134 * @eeprom: where to store the data
4135 * @io_port: the base io port
4136 **/
trms1040_read_all(struct NvRamType * eeprom,unsigned long io_port)4137 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4138 {
4139 u8 *b_eeprom = (u8 *)eeprom;
4140 u8 addr;
4141
4142 /* Enable SEEPROM */
4143 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4144 io_port + TRM_S1040_GEN_CONTROL);
4145
4146 /* read details */
4147 for (addr = 0; addr < 128; addr++, b_eeprom++)
4148 *b_eeprom = trms1040_get_data(io_port, addr);
4149
4150 /* Disable SEEPROM */
4151 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4152 io_port + TRM_S1040_GEN_CONTROL);
4153 }
4154
4155
4156
4157 /**
4158 * check_eeprom - get and check contents of the eeprom
4159 *
4160 * Read seeprom 128 bytes into the memory provider in eeprom.
4161 * Checks the checksum and if it's not correct it uses a set of default
4162 * values.
4163 *
4164 * @eeprom: caller allocated strcuture to read the eeprom data into
4165 * @io_port: io port to read from
4166 **/
check_eeprom(struct NvRamType * eeprom,unsigned long io_port)4167 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4168 {
4169 u16 *w_eeprom = (u16 *)eeprom;
4170 u16 w_addr;
4171 u16 cksum;
4172 u32 d_addr;
4173 u32 *d_eeprom;
4174
4175 trms1040_read_all(eeprom, io_port); /* read eeprom */
4176
4177 cksum = 0;
4178 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4179 w_addr++, w_eeprom++)
4180 cksum += *w_eeprom;
4181 if (cksum != 0x1234) {
4182 /*
4183 * Checksum is wrong.
4184 * Load a set of defaults into the eeprom buffer
4185 */
4186 dprintkl(KERN_WARNING,
4187 "EEProm checksum error: using default values and options.\n");
4188 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4189 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4190 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4191 eeprom->sub_sys_id[1] =
4192 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4193 eeprom->sub_class = 0x00;
4194 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4195 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4196 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4197 eeprom->device_id[1] =
4198 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4199 eeprom->reserved = 0x00;
4200
4201 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4202 d_addr < 16; d_addr++, d_eeprom++)
4203 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4204
4205 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4206 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4207 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4208 *d_eeprom = 0x00;
4209
4210 /* Now load defaults (maybe set by boot/module params) */
4211 set_safe_settings();
4212 fix_settings();
4213 eeprom_override(eeprom);
4214
4215 eeprom->cksum = 0x00;
4216 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4217 w_addr < 63; w_addr++, w_eeprom++)
4218 cksum += *w_eeprom;
4219
4220 *w_eeprom = 0x1234 - cksum;
4221 trms1040_write_all(eeprom, io_port);
4222 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4223 } else {
4224 set_safe_settings();
4225 eeprom_index_to_delay(eeprom);
4226 eeprom_override(eeprom);
4227 }
4228 }
4229
4230
4231 /**
4232 * print_eeprom_settings - output the eeprom settings
4233 * to the kernel log so people can see what they were.
4234 *
4235 * @eeprom: The eeprom data strucutre to show details for.
4236 **/
print_eeprom_settings(struct NvRamType * eeprom)4237 static void print_eeprom_settings(struct NvRamType *eeprom)
4238 {
4239 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4240 eeprom->scsi_id,
4241 eeprom->target[0].period,
4242 clock_speed[eeprom->target[0].period] / 10,
4243 clock_speed[eeprom->target[0].period] % 10,
4244 eeprom->target[0].cfg0);
4245 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4246 eeprom->channel_cfg, eeprom->max_tag,
4247 1 << eeprom->max_tag, eeprom->delay_time);
4248 }
4249
4250
4251 /* Free SG tables */
adapter_sg_tables_free(struct AdapterCtlBlk * acb)4252 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4253 {
4254 int i;
4255 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4256
4257 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4258 kfree(acb->srb_array[i].segment_x);
4259 }
4260
4261
4262 /*
4263 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4264 * should never cross a page boundary */
adapter_sg_tables_alloc(struct AdapterCtlBlk * acb)4265 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4266 {
4267 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4268 *SEGMENTX_LEN;
4269 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4270 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4271 int srb_idx = 0;
4272 unsigned i = 0;
4273 struct SGentry *uninitialized_var(ptr);
4274
4275 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4276 acb->srb_array[i].segment_x = NULL;
4277
4278 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4279 while (pages--) {
4280 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4281 if (!ptr) {
4282 adapter_sg_tables_free(acb);
4283 return 1;
4284 }
4285 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4286 PAGE_SIZE, ptr, srb_idx);
4287 i = 0;
4288 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4289 acb->srb_array[srb_idx++].segment_x =
4290 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4291 }
4292 if (i < srbs_per_page)
4293 acb->srb.segment_x =
4294 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4295 else
4296 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4297 return 0;
4298 }
4299
4300
4301
4302 /**
4303 * adapter_print_config - print adapter connection and termination
4304 * config
4305 *
4306 * The io port in the adapter needs to have been set before calling
4307 * this function.
4308 *
4309 * @acb: The adapter to print the information for.
4310 **/
adapter_print_config(struct AdapterCtlBlk * acb)4311 static void adapter_print_config(struct AdapterCtlBlk *acb)
4312 {
4313 u8 bval;
4314
4315 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4316 dprintkl(KERN_INFO, "%sConnectors: ",
4317 ((bval & WIDESCSI) ? "(Wide) " : ""));
4318 if (!(bval & CON5068))
4319 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4320 if (!(bval & CON68))
4321 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4322 if (!(bval & CON50))
4323 printk("int50 ");
4324 if ((bval & (CON5068 | CON50 | CON68)) ==
4325 0 /*(CON5068 | CON50 | CON68) */ )
4326 printk(" Oops! (All 3?) ");
4327 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4328 printk(" Termination: ");
4329 if (bval & DIS_TERM)
4330 printk("Disabled\n");
4331 else {
4332 if (bval & AUTOTERM)
4333 printk("Auto ");
4334 if (bval & LOW8TERM)
4335 printk("Low ");
4336 if (bval & UP8TERM)
4337 printk("High ");
4338 printk("\n");
4339 }
4340 }
4341
4342
4343 /**
4344 * adapter_init_params - Initialize the various parameters in the
4345 * adapter structure. Note that the pointer to the scsi_host is set
4346 * early (when this instance is created) and the io_port and irq
4347 * values are set later after they have been reserved. This just gets
4348 * everything set to a good starting position.
4349 *
4350 * The eeprom structure in the adapter needs to have been set before
4351 * calling this function.
4352 *
4353 * @acb: The adapter to initialize.
4354 **/
adapter_init_params(struct AdapterCtlBlk * acb)4355 static void adapter_init_params(struct AdapterCtlBlk *acb)
4356 {
4357 struct NvRamType *eeprom = &acb->eeprom;
4358 int i;
4359
4360 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4361 /* NOTE: acb->io_port_base is set at port registration time */
4362 /* NOTE: acb->io_port_len is set at port registration time */
4363
4364 INIT_LIST_HEAD(&acb->dcb_list);
4365 acb->dcb_run_robin = NULL;
4366 acb->active_dcb = NULL;
4367
4368 INIT_LIST_HEAD(&acb->srb_free_list);
4369 /* temp SRB for Q tag used or abort command used */
4370 acb->tmp_srb = &acb->srb;
4371 init_timer(&acb->waiting_timer);
4372 init_timer(&acb->selto_timer);
4373
4374 acb->srb_count = DC395x_MAX_SRB_CNT;
4375
4376 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4377 /* NOTE: acb->irq_level is set at IRQ registration time */
4378
4379 acb->tag_max_num = 1 << eeprom->max_tag;
4380 if (acb->tag_max_num > 30)
4381 acb->tag_max_num = 30;
4382
4383 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4384 acb->gmode2 = eeprom->channel_cfg;
4385 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4386
4387 if (eeprom->channel_cfg & NAC_SCANLUN)
4388 acb->lun_chk = 1;
4389 acb->scan_devices = 1;
4390
4391 acb->scsi_host->this_id = eeprom->scsi_id;
4392 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4393
4394 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4395 acb->dcb_map[i] = 0;
4396
4397 acb->msg_len = 0;
4398
4399 /* link static array of srbs into the srb free list */
4400 for (i = 0; i < acb->srb_count - 1; i++)
4401 srb_free_insert(acb, &acb->srb_array[i]);
4402 }
4403
4404
4405 /**
4406 * adapter_init_host - Initialize the scsi host instance based on
4407 * values that we have already stored in the adapter instance. There's
4408 * some mention that a lot of these are deprecated, so we won't use
4409 * them (we'll use the ones in the adapter instance) but we'll fill
4410 * them in in case something else needs them.
4411 *
4412 * The eeprom structure, irq and io ports in the adapter need to have
4413 * been set before calling this function.
4414 *
4415 * @host: The scsi host instance to fill in the values for.
4416 **/
adapter_init_scsi_host(struct Scsi_Host * host)4417 static void adapter_init_scsi_host(struct Scsi_Host *host)
4418 {
4419 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4420 struct NvRamType *eeprom = &acb->eeprom;
4421
4422 host->max_cmd_len = 24;
4423 host->can_queue = DC395x_MAX_CMD_QUEUE;
4424 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4425 host->this_id = (int)eeprom->scsi_id;
4426 host->io_port = acb->io_port_base;
4427 host->n_io_port = acb->io_port_len;
4428 host->dma_channel = -1;
4429 host->unique_id = acb->io_port_base;
4430 host->irq = acb->irq_level;
4431 acb->last_reset = jiffies;
4432
4433 host->max_id = 16;
4434 if (host->max_id - 1 == eeprom->scsi_id)
4435 host->max_id--;
4436
4437 if (eeprom->channel_cfg & NAC_SCANLUN)
4438 host->max_lun = 8;
4439 else
4440 host->max_lun = 1;
4441 }
4442
4443
4444 /**
4445 * adapter_init_chip - Get the chip into a know state and figure out
4446 * some of the settings that apply to this adapter.
4447 *
4448 * The io port in the adapter needs to have been set before calling
4449 * this function. The config will be configured correctly on return.
4450 *
4451 * @acb: The adapter which we are to init.
4452 **/
adapter_init_chip(struct AdapterCtlBlk * acb)4453 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4454 {
4455 struct NvRamType *eeprom = &acb->eeprom;
4456
4457 /* Mask all the interrupt */
4458 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4459 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4460
4461 /* Reset SCSI module */
4462 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4463
4464 /* Reset PCI/DMA module */
4465 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4466 udelay(20);
4467
4468 /* program configuration 0 */
4469 acb->config = HCC_AUTOTERM | HCC_PARITY;
4470 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4471 acb->config |= HCC_WIDE_CARD;
4472
4473 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4474 acb->config |= HCC_SCSI_RESET;
4475
4476 if (acb->config & HCC_SCSI_RESET) {
4477 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4478 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4479
4480 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4481 /*spin_unlock_irq (&io_request_lock); */
4482 udelay(500);
4483
4484 acb->last_reset =
4485 jiffies + HZ / 2 +
4486 HZ * acb->eeprom.delay_time;
4487
4488 /*spin_lock_irq (&io_request_lock); */
4489 }
4490 }
4491
4492
4493 /**
4494 * init_adapter - Grab the resource for the card, setup the adapter
4495 * information, set the card into a known state, create the various
4496 * tables etc etc. This basically gets all adapter information all up
4497 * to date, initialised and gets the chip in sync with it.
4498 *
4499 * @host: This hosts adapter structure
4500 * @io_port: The base I/O port
4501 * @irq: IRQ
4502 *
4503 * Returns 0 if the initialization succeeds, any other value on
4504 * failure.
4505 **/
adapter_init(struct AdapterCtlBlk * acb,unsigned long io_port,u32 io_port_len,unsigned int irq)4506 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4507 u32 io_port_len, unsigned int irq)
4508 {
4509 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4510 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4511 goto failed;
4512 }
4513 /* store port base to indicate we have registered it */
4514 acb->io_port_base = io_port;
4515 acb->io_port_len = io_port_len;
4516
4517 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4518 /* release the region we just claimed */
4519 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4520 goto failed;
4521 }
4522 /* store irq to indicate we have registered it */
4523 acb->irq_level = irq;
4524
4525 /* get eeprom configuration information and command line settings etc */
4526 check_eeprom(&acb->eeprom, io_port);
4527 print_eeprom_settings(&acb->eeprom);
4528
4529 /* setup adapter control block */
4530 adapter_init_params(acb);
4531
4532 /* display card connectors/termination settings */
4533 adapter_print_config(acb);
4534
4535 if (adapter_sg_tables_alloc(acb)) {
4536 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4537 goto failed;
4538 }
4539 adapter_init_scsi_host(acb->scsi_host);
4540 adapter_init_chip(acb);
4541 set_basic_config(acb);
4542
4543 dprintkdbg(DBG_0,
4544 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4545 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4546 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4547 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4548 return 0;
4549
4550 failed:
4551 if (acb->irq_level)
4552 free_irq(acb->irq_level, acb);
4553 if (acb->io_port_base)
4554 release_region(acb->io_port_base, acb->io_port_len);
4555 adapter_sg_tables_free(acb);
4556
4557 return 1;
4558 }
4559
4560
4561 /**
4562 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4563 * stopping all operations and disabling interrupt generation on the
4564 * card.
4565 *
4566 * @acb: The adapter which we are to shutdown.
4567 **/
adapter_uninit_chip(struct AdapterCtlBlk * acb)4568 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4569 {
4570 /* disable interrupts */
4571 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4572 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4573
4574 /* reset the scsi bus */
4575 if (acb->config & HCC_SCSI_RESET)
4576 reset_scsi_bus(acb);
4577
4578 /* clear any pending interrupt state */
4579 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4580 }
4581
4582
4583
4584 /**
4585 * adapter_uninit - Shut down the chip and release any resources that
4586 * we had allocated. Once this returns the adapter should not be used
4587 * anymore.
4588 *
4589 * @acb: The adapter which we are to un-initialize.
4590 **/
adapter_uninit(struct AdapterCtlBlk * acb)4591 static void adapter_uninit(struct AdapterCtlBlk *acb)
4592 {
4593 unsigned long flags;
4594 DC395x_LOCK_IO(acb->scsi_host, flags);
4595
4596 /* remove timers */
4597 if (timer_pending(&acb->waiting_timer))
4598 del_timer(&acb->waiting_timer);
4599 if (timer_pending(&acb->selto_timer))
4600 del_timer(&acb->selto_timer);
4601
4602 adapter_uninit_chip(acb);
4603 adapter_remove_and_free_all_devices(acb);
4604 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4605
4606 if (acb->irq_level)
4607 free_irq(acb->irq_level, acb);
4608 if (acb->io_port_base)
4609 release_region(acb->io_port_base, acb->io_port_len);
4610
4611 adapter_sg_tables_free(acb);
4612 }
4613
4614
4615 #undef YESNO
4616 #define YESNO(YN) \
4617 if (YN) seq_printf(m, " Yes ");\
4618 else seq_printf(m, " No ")
4619
dc395x_show_info(struct seq_file * m,struct Scsi_Host * host)4620 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4621 {
4622 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4623 int spd, spd1;
4624 struct DeviceCtlBlk *dcb;
4625 unsigned long flags;
4626 int dev;
4627
4628 seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4629 " Driver Version " DC395X_VERSION "\n");
4630
4631 DC395x_LOCK_IO(acb->scsi_host, flags);
4632
4633 seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4634 seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4635 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4636 seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4637 seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4638 seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4639
4640 seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4641 seq_printf(m, "AdapterID %i\n", host->this_id);
4642
4643 seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4644 /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4645 seq_printf(m, ", FilterCfg 0x%02x",
4646 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4647 seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4648 /*seq_printf(m, "\n"); */
4649
4650 seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4651 seq_printf(m, "Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4652 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4653 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4654 acb->dcb_map[6], acb->dcb_map[7]);
4655 seq_printf(m, " %02x %02x %02x %02x %02x %02x %02x %02x\n",
4656 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4657 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4658 acb->dcb_map[14], acb->dcb_map[15]);
4659
4660 seq_puts(m,
4661 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4662
4663 dev = 0;
4664 list_for_each_entry(dcb, &acb->dcb_list, list) {
4665 int nego_period;
4666 seq_printf(m, "%02i %02i %02i ", dev, dcb->target_id,
4667 dcb->target_lun);
4668 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4669 YESNO(dcb->sync_offset);
4670 YESNO(dcb->sync_period & WIDE_SYNC);
4671 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4672 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4673 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4674 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4675 if (dcb->sync_offset)
4676 seq_printf(m, " %03i ns ", nego_period);
4677 else
4678 seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4679
4680 if (dcb->sync_offset & 0x0f) {
4681 spd = 1000 / (nego_period);
4682 spd1 = 1000 % (nego_period);
4683 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4684 seq_printf(m, " %2i.%1i M %02i ", spd, spd1,
4685 (dcb->sync_offset & 0x0f));
4686 } else
4687 seq_puts(m, " ");
4688
4689 /* Add more info ... */
4690 seq_printf(m, " %02i\n", dcb->max_command);
4691 dev++;
4692 }
4693
4694 if (timer_pending(&acb->waiting_timer))
4695 seq_puts(m, "Waiting queue timer running\n");
4696 else
4697 seq_putc(m, '\n');
4698
4699 list_for_each_entry(dcb, &acb->dcb_list, list) {
4700 struct ScsiReqBlk *srb;
4701 if (!list_empty(&dcb->srb_waiting_list))
4702 seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4703 dcb->target_id, dcb->target_lun,
4704 list_size(&dcb->srb_waiting_list));
4705 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4706 seq_printf(m, " %p", srb->cmd);
4707 if (!list_empty(&dcb->srb_going_list))
4708 seq_printf(m, "\nDCB (%02i-%i): Going : %i:",
4709 dcb->target_id, dcb->target_lun,
4710 list_size(&dcb->srb_going_list));
4711 list_for_each_entry(srb, &dcb->srb_going_list, list)
4712 seq_printf(m, " %p", srb->cmd);
4713 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4714 seq_putc(m, '\n');
4715 }
4716
4717 if (debug_enabled(DBG_1)) {
4718 seq_printf(m, "DCB list for ACB %p:\n", acb);
4719 list_for_each_entry(dcb, &acb->dcb_list, list) {
4720 seq_printf(m, "%p -> ", dcb);
4721 }
4722 seq_puts(m, "END\n");
4723 }
4724
4725 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4726 return 0;
4727 }
4728
4729
4730 static struct scsi_host_template dc395x_driver_template = {
4731 .module = THIS_MODULE,
4732 .proc_name = DC395X_NAME,
4733 .show_info = dc395x_show_info,
4734 .name = DC395X_BANNER " " DC395X_VERSION,
4735 .queuecommand = dc395x_queue_command,
4736 .bios_param = dc395x_bios_param,
4737 .slave_alloc = dc395x_slave_alloc,
4738 .slave_destroy = dc395x_slave_destroy,
4739 .can_queue = DC395x_MAX_CAN_QUEUE,
4740 .this_id = 7,
4741 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4742 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4743 .eh_abort_handler = dc395x_eh_abort,
4744 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4745 .use_clustering = DISABLE_CLUSTERING,
4746 };
4747
4748
4749 /**
4750 * banner_display - Display banner on first instance of driver
4751 * initialized.
4752 **/
banner_display(void)4753 static void banner_display(void)
4754 {
4755 static int banner_done = 0;
4756 if (!banner_done)
4757 {
4758 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4759 banner_done = 1;
4760 }
4761 }
4762
4763
4764 /**
4765 * dc395x_init_one - Initialise a single instance of the adapter.
4766 *
4767 * The PCI layer will call this once for each instance of the adapter
4768 * that it finds in the system. The pci_dev strcuture indicates which
4769 * instance we are being called from.
4770 *
4771 * @dev: The PCI device to initialize.
4772 * @id: Looks like a pointer to the entry in our pci device table
4773 * that was actually matched by the PCI subsystem.
4774 *
4775 * Returns 0 on success, or an error code (-ve) on failure.
4776 **/
dc395x_init_one(struct pci_dev * dev,const struct pci_device_id * id)4777 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4778 {
4779 struct Scsi_Host *scsi_host = NULL;
4780 struct AdapterCtlBlk *acb = NULL;
4781 unsigned long io_port_base;
4782 unsigned int io_port_len;
4783 unsigned int irq;
4784
4785 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4786 banner_display();
4787
4788 if (pci_enable_device(dev))
4789 {
4790 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4791 return -ENODEV;
4792 }
4793 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4794 io_port_len = pci_resource_len(dev, 0);
4795 irq = dev->irq;
4796 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4797
4798 /* allocate scsi host information (includes out adapter) */
4799 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4800 sizeof(struct AdapterCtlBlk));
4801 if (!scsi_host) {
4802 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4803 goto fail;
4804 }
4805 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4806 acb->scsi_host = scsi_host;
4807 acb->dev = dev;
4808
4809 /* initialise the adapter and everything we need */
4810 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4811 dprintkl(KERN_INFO, "adapter init failed\n");
4812 goto fail;
4813 }
4814
4815 pci_set_master(dev);
4816
4817 /* get the scsi mid level to scan for new devices on the bus */
4818 if (scsi_add_host(scsi_host, &dev->dev)) {
4819 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4820 goto fail;
4821 }
4822 pci_set_drvdata(dev, scsi_host);
4823 scsi_scan_host(scsi_host);
4824
4825 return 0;
4826
4827 fail:
4828 if (acb != NULL)
4829 adapter_uninit(acb);
4830 if (scsi_host != NULL)
4831 scsi_host_put(scsi_host);
4832 pci_disable_device(dev);
4833 return -ENODEV;
4834 }
4835
4836
4837 /**
4838 * dc395x_remove_one - Called to remove a single instance of the
4839 * adapter.
4840 *
4841 * @dev: The PCI device to initialize.
4842 **/
dc395x_remove_one(struct pci_dev * dev)4843 static void dc395x_remove_one(struct pci_dev *dev)
4844 {
4845 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4846 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4847
4848 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4849
4850 scsi_remove_host(scsi_host);
4851 adapter_uninit(acb);
4852 pci_disable_device(dev);
4853 scsi_host_put(scsi_host);
4854 }
4855
4856
4857 static struct pci_device_id dc395x_pci_table[] = {
4858 {
4859 .vendor = PCI_VENDOR_ID_TEKRAM,
4860 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4861 .subvendor = PCI_ANY_ID,
4862 .subdevice = PCI_ANY_ID,
4863 },
4864 {} /* Terminating entry */
4865 };
4866 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4867
4868
4869 static struct pci_driver dc395x_driver = {
4870 .name = DC395X_NAME,
4871 .id_table = dc395x_pci_table,
4872 .probe = dc395x_init_one,
4873 .remove = dc395x_remove_one,
4874 };
4875
4876
4877 /**
4878 * dc395x_module_init - Module initialization function
4879 *
4880 * Used by both module and built-in driver to initialise this driver.
4881 **/
dc395x_module_init(void)4882 static int __init dc395x_module_init(void)
4883 {
4884 return pci_register_driver(&dc395x_driver);
4885 }
4886
4887
4888 /**
4889 * dc395x_module_exit - Module cleanup function.
4890 **/
dc395x_module_exit(void)4891 static void __exit dc395x_module_exit(void)
4892 {
4893 pci_unregister_driver(&dc395x_driver);
4894 }
4895
4896
4897 module_init(dc395x_module_init);
4898 module_exit(dc395x_module_exit);
4899
4900 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4901 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4902 MODULE_LICENSE("GPL");
4903