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[PATCH] v4l: keep tvaudio driver away from saa7146
[linux-2.6/history.git] / drivers / scsi / dc395x.c
blobb08c3e6b128377d2f12c55411c5c3f4d8a486a9f
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 <asm/io.h>
60
61 #include <scsi/scsi.h>
62 #include <scsi/scsicam.h> /* needed for scsicam_bios_param */
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_device.h>
65 #include <scsi/scsi_host.h>
66
67 #include "dc395x.h"
68
69 #define DC395X_NAME "dc395x"
70 #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
71 #define DC395X_VERSION "v2.05, 2004/03/08"
72
73 /*---------------------------------------------------------------------------
74 Features
75 ---------------------------------------------------------------------------*/
76 /*
77 * Set to disable parts of the driver
78 */
79 /*#define DC395x_NO_DISCONNECT*/
80 /*#define DC395x_NO_TAGQ*/
81 /*#define DC395x_NO_SYNC*/
82 /*#define DC395x_NO_WIDE*/
83
84 /*---------------------------------------------------------------------------
85 Debugging
86 ---------------------------------------------------------------------------*/
87 /*
88 * Types of debugging that can be enabled and disabled
89 */
90 #define DBG_KG 0x0001
91 #define DBG_0 0x0002
92 #define DBG_1 0x0004
93 #define DBG_SG 0x0020
94 #define DBG_FIFO 0x0040
95 #define DBG_PIO 0x0080
96
97
98 /*
99 * Set set of things to output debugging for.
100 * Undefine to remove all debugging
101 */
102 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
103 /*#define DEBUG_MASK DBG_0*/
104
105
106 /*
107 * Output a kernel mesage at the specified level and append the
108 * driver name and a ": " to the start of the message
109 */
110 #define dprintkl(level, format, arg...) \
111 printk(level DC395X_NAME ": " format , ## arg)
112
113
114 #ifdef DEBUG_MASK
115 /*
116 * print a debug message - this is formated with KERN_DEBUG, then the
117 * driver name followed by a ": " and then the message is output.
118 * This also checks that the specified debug level is enabled before
119 * outputing the message
120 */
121 #define dprintkdbg(type, format, arg...) \
122 do { \
123 if ((type) & (DEBUG_MASK)) \
124 dprintkl(KERN_DEBUG , format , ## arg); \
125 } while (0)
126
127 /*
128 * Check if the specified type of debugging is enabled
129 */
130 #define debug_enabled(type) ((DEBUG_MASK) & (type))
131
132 #else
133 /*
134 * No debugging. Do nothing
135 */
136 #define dprintkdbg(type, format, arg...) \
137 do {} while (0)
138 #define debug_enabled(type) (0)
139
140 #endif
141
142
143 #ifndef PCI_VENDOR_ID_TEKRAM
144 #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */
145 #endif
146 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
147 #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */
148 #endif
149
150
151 #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
152 #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
153
154 #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address)))
155 #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address)))
156 #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address)))
157 #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address))
158 #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))
159 #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))
160
161 /* cmd->result */
162 #define RES_TARGET 0x000000FF /* Target State */
163 #define RES_TARGET_LNX STATUS_MASK /* Only official ... */
164 #define RES_ENDMSG 0x0000FF00 /* End Message */
165 #define RES_DID 0x00FF0000 /* DID_ codes */
166 #define RES_DRV 0xFF000000 /* DRIVER_ codes */
167
168 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
169 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
170
171 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
172 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
173 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
174 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
175 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
176
177 #define TAG_NONE 255
178
179 /*
180 * srb->segement_x is the hw sg list. It is always allocated as a
181 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
182 * cross a page boundy.
183 */
184 #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
185
186
187 struct SGentry {
188 u32 address; /* bus! address */
189 u32 length;
190 };
191
192 /* The SEEPROM structure for TRM_S1040 */
193 struct NVRamTarget {
194 u8 cfg0; /* Target configuration byte 0 */
195 u8 period; /* Target period */
196 u8 cfg2; /* Target configuration byte 2 */
197 u8 cfg3; /* Target configuration byte 3 */
198 };
199
200 struct NvRamType {
201 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */
202 u8 sub_sys_id[2]; /* 2,3 Sub System ID */
203 u8 sub_class; /* 4 Sub Class */
204 u8 vendor_id[2]; /* 5,6 Vendor ID */
205 u8 device_id[2]; /* 7,8 Device ID */
206 u8 reserved; /* 9 Reserved */
207 struct NVRamTarget target[DC395x_MAX_SCSI_ID];
208 /** 10,11,12,13
209 ** 14,15,16,17
210 ** ....
211 ** ....
212 ** 70,71,72,73
213 */
214 u8 scsi_id; /* 74 Host Adapter SCSI ID */
215 u8 channel_cfg; /* 75 Channel configuration */
216 u8 delay_time; /* 76 Power on delay time */
217 u8 max_tag; /* 77 Maximum tags */
218 u8 reserved0; /* 78 */
219 u8 boot_target; /* 79 */
220 u8 boot_lun; /* 80 */
221 u8 reserved1; /* 81 */
222 u16 reserved2[22]; /* 82,..125 */
223 u16 cksum; /* 126,127 */
224 };
225
226 struct ScsiReqBlk {
227 struct list_head list; /* next/prev ptrs for srb lists */
228 struct DeviceCtlBlk *dcb;
229 struct scsi_cmnd *cmd;
230
231 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */
232 u32 sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */
233
234 u8 sg_count; /* No of HW sg entries for this request */
235 u8 sg_index; /* Index of HW sg entry for this request */
236 u32 total_xfer_length; /* Total number of bytes remaining to be transfered */
237 unsigned char *virt_addr; /* Virtual address of current transfer position */
238
239 /*
240 * The sense buffer handling function, request_sense, uses
241 * the first hw sg entry (segment_x[0]) and the transfer
242 * length (total_xfer_length). While doing this it stores the
243 * original values into the last sg hw list
244 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
245 * total_xfer_length in xferred. These values are restored in
246 * pci_unmap_srb_sense. This is the only place xferred is used.
247 */
248 u32 xferred; /* Saved copy of total_xfer_length */
249
250 u16 state;
251
252 u8 msgin_buf[6];
253 u8 msgout_buf[6];
254
255 u8 adapter_status;
256 u8 target_status;
257 u8 msg_count;
258 u8 end_message;
259
260 u8 tag_number;
261 u8 status;
262 u8 retry_count;
263 u8 flag;
264
265 u8 scsi_phase;
266 };
267
268 struct DeviceCtlBlk {
269 struct list_head list; /* next/prev ptrs for the dcb list */
270 struct AdapterCtlBlk *acb;
271 struct list_head srb_going_list; /* head of going srb list */
272 struct list_head srb_waiting_list; /* head of waiting srb list */
273
274 struct ScsiReqBlk *active_srb;
275 u32 tag_mask;
276
277 u16 max_command;
278
279 u8 target_id; /* SCSI Target ID (SCSI Only) */
280 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */
281 u8 identify_msg;
282 u8 dev_mode;
283
284 u8 inquiry7; /* To store Inquiry flags */
285 u8 sync_mode; /* 0:async mode */
286 u8 min_nego_period; /* for nego. */
287 u8 sync_period; /* for reg. */
288
289 u8 sync_offset; /* for reg. and nego.(low nibble) */
290 u8 flag;
291 u8 dev_type;
292 u8 init_tcq_flag;
293 };
294
295 struct AdapterCtlBlk {
296 struct Scsi_Host *scsi_host;
297
298 u16 io_port_base;
299 u16 io_port_len;
300
301 struct list_head dcb_list; /* head of going dcb list */
302 struct DeviceCtlBlk *dcb_run_robin;
303 struct DeviceCtlBlk *active_dcb;
304
305 struct list_head srb_free_list; /* head of free srb list */
306 struct ScsiReqBlk *tmp_srb;
307 struct timer_list waiting_timer;
308 struct timer_list selto_timer;
309
310 u16 srb_count;
311
312 u8 sel_timeout;
313
314 u8 irq_level;
315 u8 tag_max_num;
316 u8 acb_flag;
317 u8 gmode2;
318
319 u8 config;
320 u8 lun_chk;
321 u8 scan_devices;
322 u8 hostid_bit;
323
324 u8 dcb_map[DC395x_MAX_SCSI_ID];
325 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
326
327 struct pci_dev *dev;
328
329 u8 msg_len;
330
331 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
332 struct ScsiReqBlk srb;
333
334 struct NvRamType eeprom; /* eeprom settings for this adapter */
335 };
336
337
338 /*---------------------------------------------------------------------------
339 Forward declarations
340 ---------------------------------------------------------------------------*/
341 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
342 u16 *pscsi_status);
343 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
344 u16 *pscsi_status);
345 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
346 u16 *pscsi_status);
347 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
348 u16 *pscsi_status);
349 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
350 u16 *pscsi_status);
351 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
352 u16 *pscsi_status);
353 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
354 u16 *pscsi_status);
355 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
356 u16 *pscsi_status);
357 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
358 u16 *pscsi_status);
359 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
360 u16 *pscsi_status);
361 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
362 u16 *pscsi_status);
363 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
364 u16 *pscsi_status);
365 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
366 u16 *pscsi_status);
367 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
368 u16 *pscsi_status);
369 static void set_basic_config(struct AdapterCtlBlk *acb);
370 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
371 struct ScsiReqBlk *srb);
372 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
373 static void data_io_transfer(struct AdapterCtlBlk *acb,
374 struct ScsiReqBlk *srb, u16 io_dir);
375 static void disconnect(struct AdapterCtlBlk *acb);
376 static void reselect(struct AdapterCtlBlk *acb);
377 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
378 struct ScsiReqBlk *srb);
379 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
380 struct ScsiReqBlk *srb);
381 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
382 struct ScsiReqBlk *srb);
383 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
384 struct scsi_cmnd *cmd, u8 force);
385 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
386 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
387 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
388 struct ScsiReqBlk *srb);
389 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
390 struct ScsiReqBlk *srb);
391 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
392 struct ScsiReqBlk *srb);
393 static void set_xfer_rate(struct AdapterCtlBlk *acb,
394 struct DeviceCtlBlk *dcb);
395 static void waiting_timeout(unsigned long ptr);
396
397
398 /*---------------------------------------------------------------------------
399 Static Data
400 ---------------------------------------------------------------------------*/
401 static u16 current_sync_offset = 0;
402
403 static void *dc395x_scsi_phase0[] = {
404 data_out_phase0,/* phase:0 */
405 data_in_phase0, /* phase:1 */
406 command_phase0, /* phase:2 */
407 status_phase0, /* phase:3 */
408 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
409 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
410 msgout_phase0, /* phase:6 */
411 msgin_phase0, /* phase:7 */
412 };
413
414 static void *dc395x_scsi_phase1[] = {
415 data_out_phase1,/* phase:0 */
416 data_in_phase1, /* phase:1 */
417 command_phase1, /* phase:2 */
418 status_phase1, /* phase:3 */
419 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
420 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
421 msgout_phase1, /* phase:6 */
422 msgin_phase1, /* phase:7 */
423 };
424
425 /*
426 *Fast20: 000 50ns, 20.0 MHz
427 * 001 75ns, 13.3 MHz
428 * 010 100ns, 10.0 MHz
429 * 011 125ns, 8.0 MHz
430 * 100 150ns, 6.6 MHz
431 * 101 175ns, 5.7 MHz
432 * 110 200ns, 5.0 MHz
433 * 111 250ns, 4.0 MHz
434 *
435 *Fast40(LVDS): 000 25ns, 40.0 MHz
436 * 001 50ns, 20.0 MHz
437 * 010 75ns, 13.3 MHz
438 * 011 100ns, 10.0 MHz
439 * 100 125ns, 8.0 MHz
440 * 101 150ns, 6.6 MHz
441 * 110 175ns, 5.7 MHz
442 * 111 200ns, 5.0 MHz
443 */
444 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
445
446 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
447 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
448 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
449
450
451 /*---------------------------------------------------------------------------
452 Configuration
453 ---------------------------------------------------------------------------*/
454 /*
455 * Module/boot parameters currently effect *all* instances of the
456 * card in the system.
457 */
458
459 /*
460 * Command line parameters are stored in a structure below.
461 * These are the index's into the structure for the various
462 * command line options.
463 */
464 #define CFG_ADAPTER_ID 0
465 #define CFG_MAX_SPEED 1
466 #define CFG_DEV_MODE 2
467 #define CFG_ADAPTER_MODE 3
468 #define CFG_TAGS 4
469 #define CFG_RESET_DELAY 5
470
471 #define CFG_NUM 6 /* number of configuration items */
472
473
474 /*
475 * Value used to indicate that a command line override
476 * hasn't been used to modify the value.
477 */
478 #define CFG_PARAM_UNSET -1
479
480
481 /*
482 * Hold command line parameters.
483 */
484 struct ParameterData {
485 int value; /* value of this setting */
486 int min; /* minimum value */
487 int max; /* maximum value */
488 int def; /* default value */
489 int safe; /* safe value */
490 };
491 static struct ParameterData __initdata cfg_data[] = {
492 { /* adapter id */
493 CFG_PARAM_UNSET,
494 0,
495 15,
496 7,
497 7
498 },
499 { /* max speed */
500 CFG_PARAM_UNSET,
501 0,
502 7,
503 1, /* 13.3Mhz */
504 4, /* 6.7Hmz */
505 },
506 { /* dev mode */
507 CFG_PARAM_UNSET,
508 0,
509 0x3f,
510 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
511 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
512 NTC_DO_SEND_START,
513 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
514 },
515 { /* adapter mode */
516 CFG_PARAM_UNSET,
517 0,
518 0x2f,
519 #ifdef CONFIG_SCSI_MULTI_LUN
520 NAC_SCANLUN |
521 #endif
522 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
523 /*| NAC_ACTIVE_NEG*/,
524 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
525 },
526 { /* tags */
527 CFG_PARAM_UNSET,
528 0,
529 5,
530 3, /* 16 tags (??) */
531 2,
532 },
533 { /* reset delay */
534 CFG_PARAM_UNSET,
535 0,
536 180,
537 1, /* 1 second */
538 10, /* 10 seconds */
539 }
540 };
541
542
543 /*
544 * Safe settings. If set to zero the the BIOS/default values with
545 * command line overrides will be used. If set to 1 then safe and
546 * slow settings will be used.
547 */
548 static int use_safe_settings = 0;
549 module_param_named(safe, use_safe_settings, bool, 0);
550 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
551
552
553 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
554 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
555
556 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
557 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");
558
559 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
560 MODULE_PARM_DESC(dev_mode, "Device mode.");
561
562 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
563 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
564
565 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
566 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
567
568 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
569 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
570
571
572 /**
573 * set_safe_settings - if the use_safe_settings option is set then
574 * set all values to the safe and slow values.
575 **/
576 static void __init set_safe_settings(void)
577 {
578 if (use_safe_settings)
579 {
580 int i;
581
582 dprintkl(KERN_INFO, "Using safe settings.\n");
583 for (i = 0; i < CFG_NUM; i++)
584 {
585 cfg_data[i].value = cfg_data[i].safe;
586 }
587 }
588 }
589
590
591 /**
592 * fix_settings - reset any boot parameters which are out of range
593 * back to the default values.
594 **/
595 static void __init fix_settings(void)
596 {
597 int i;
598
599 dprintkdbg(DBG_1,
600 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
601 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
602 cfg_data[CFG_ADAPTER_ID].value,
603 cfg_data[CFG_MAX_SPEED].value,
604 cfg_data[CFG_DEV_MODE].value,
605 cfg_data[CFG_ADAPTER_MODE].value,
606 cfg_data[CFG_TAGS].value,
607 cfg_data[CFG_RESET_DELAY].value);
608 for (i = 0; i < CFG_NUM; i++)
609 {
610 if (cfg_data[i].value < cfg_data[i].min
611 || cfg_data[i].value > cfg_data[i].max)
612 cfg_data[i].value = cfg_data[i].def;
613 }
614 }
615
616
617
618 /*
619 * Mapping from the eeprom delay index value (index into this array)
620 * to the the number of actual seconds that the delay should be for.
621 */
622 static char __initdata eeprom_index_to_delay_map[] =
623 { 1, 3, 5, 10, 16, 30, 60, 120 };
624
625
626 /**
627 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
628 * into a number of seconds.
629 *
630 * @eeprom: The eeprom structure in which we find the delay index to map.
631 **/
632 static void __init eeprom_index_to_delay(struct NvRamType *eeprom)
633 {
634 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
635 }
636
637
638 /**
639 * delay_to_eeprom_index - Take a delay in seconds and return the
640 * closest eeprom index which will delay for at least that amount of
641 * seconds.
642 *
643 * @delay: The delay, in seconds, to find the eeprom index for.
644 **/
645 static int __init delay_to_eeprom_index(int delay)
646 {
647 u8 idx = 0;
648 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
649 idx++;
650 return idx;
651 }
652
653
654 /**
655 * eeprom_override - Override the eeprom settings, in the provided
656 * eeprom structure, with values that have been set on the command
657 * line.
658 *
659 * @eeprom: The eeprom data to override with command line options.
660 **/
661 static void __init eeprom_override(struct NvRamType *eeprom)
662 {
663 u8 id;
664
665 /* Adapter Settings */
666 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
667 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
668
669 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
670 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
671
672 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
673 eeprom->delay_time = delay_to_eeprom_index(
674 cfg_data[CFG_RESET_DELAY].value);
675
676 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
677 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
678
679 /* Device Settings */
680 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
681 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
682 eeprom->target[id].cfg0 =
683 (u8)cfg_data[CFG_DEV_MODE].value;
684
685 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
686 eeprom->target[id].period =
687 (u8)cfg_data[CFG_MAX_SPEED].value;
688
689 }
690 }
691
692
693 /*---------------------------------------------------------------------------
694 ---------------------------------------------------------------------------*/
695
696 static unsigned int list_size(struct list_head *head)
697 {
698 unsigned int count = 0;
699 struct list_head *pos;
700 list_for_each(pos, head)
701 count++;
702 return count;
703 }
704
705
706 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
707 struct DeviceCtlBlk *pos)
708 {
709 int use_next = 0;
710 struct DeviceCtlBlk* next = NULL;
711 struct DeviceCtlBlk* i;
712
713 if (list_empty(head))
714 return NULL;
715
716 /* find supplied dcb and then select the next one */
717 list_for_each_entry(i, head, list)
718 if (use_next) {
719 next = i;
720 break;
721 } else if (i == pos) {
722 use_next = 1;
723 }
724 /* if no next one take the head one (ie, wraparound) */
725 if (!next)
726 list_for_each_entry(i, head, list) {
727 next = i;
728 break;
729 }
730
731 return next;
732 }
733
734
735 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
736 {
737 if (srb->tag_number < 255) {
738 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
739 srb->tag_number = 255;
740 }
741 }
742
743
744 /* Find cmd in SRB list */
745 inline static struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
746 struct list_head *head)
747 {
748 struct ScsiReqBlk *i;
749 list_for_each_entry(i, head, list)
750 if (i->cmd == cmd)
751 return i;
752 return NULL;
753 }
754
755
756 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
757 {
758 struct list_head *head = &acb->srb_free_list;
759 struct ScsiReqBlk *srb = NULL;
760
761 if (!list_empty(head)) {
762 srb = list_entry(head->next, struct ScsiReqBlk, list);
763 list_del(head->next);
764 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
765 }
766 return srb;
767 }
768
769
770 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
771 {
772 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
773 list_add_tail(&srb->list, &acb->srb_free_list);
774 }
775
776
777 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
778 struct ScsiReqBlk *srb)
779 {
780 dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
781 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
782 list_add(&srb->list, &dcb->srb_waiting_list);
783 }
784
785
786 static void srb_waiting_append(struct DeviceCtlBlk *dcb,
787 struct ScsiReqBlk *srb)
788 {
789 dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
790 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
791 list_add_tail(&srb->list, &dcb->srb_waiting_list);
792 }
793
794
795 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
796 {
797 dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
798 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
799 list_add_tail(&srb->list, &dcb->srb_going_list);
800 }
801
802
803 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
804 {
805 struct ScsiReqBlk *i;
806 struct ScsiReqBlk *tmp;
807 dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
808 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
809
810 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
811 if (i == srb) {
812 list_del(&srb->list);
813 break;
814 }
815 }
816
817
818 static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
819 struct ScsiReqBlk *srb)
820 {
821 struct ScsiReqBlk *i;
822 struct ScsiReqBlk *tmp;
823 dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
824 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
825
826 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
827 if (i == srb) {
828 list_del(&srb->list);
829 break;
830 }
831 }
832
833
834 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
835 struct ScsiReqBlk *srb)
836 {
837 dprintkdbg(DBG_0,
838 "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
839 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
840 list_move(&srb->list, &dcb->srb_waiting_list);
841 }
842
843
844 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
845 struct ScsiReqBlk *srb)
846 {
847 dprintkdbg(DBG_0,
848 "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
849 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
850 list_move(&srb->list, &dcb->srb_going_list);
851 }
852
853
854 /* Sets the timer to wake us up */
855 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
856 {
857 if (timer_pending(&acb->waiting_timer))
858 return;
859 init_timer(&acb->waiting_timer);
860 acb->waiting_timer.function = waiting_timeout;
861 acb->waiting_timer.data = (unsigned long) acb;
862 if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
863 acb->waiting_timer.expires =
864 acb->scsi_host->last_reset - HZ / 2 + 1;
865 else
866 acb->waiting_timer.expires = jiffies + to + 1;
867 add_timer(&acb->waiting_timer);
868 }
869
870
871 /* Send the next command from the waiting list to the bus */
872 static void waiting_process_next(struct AdapterCtlBlk *acb)
873 {
874 struct DeviceCtlBlk *start = NULL;
875 struct DeviceCtlBlk *pos;
876 struct DeviceCtlBlk *dcb;
877 struct ScsiReqBlk *srb;
878 struct list_head *dcb_list_head = &acb->dcb_list;
879
880 if (acb->active_dcb
881 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
882 return;
883
884 if (timer_pending(&acb->waiting_timer))
885 del_timer(&acb->waiting_timer);
886
887 if (list_empty(dcb_list_head))
888 return;
889
890 /*
891 * Find the starting dcb. Need to find it again in the list
892 * since the list may have changed since we set the ptr to it
893 */
894 list_for_each_entry(dcb, dcb_list_head, list)
895 if (dcb == acb->dcb_run_robin) {
896 start = dcb;
897 break;
898 }
899 if (!start) {
900 /* This can happen! */
901 start = list_entry(dcb_list_head->next, typeof(*start), list);
902 acb->dcb_run_robin = start;
903 }
904
905
906 /*
907 * Loop over the dcb, but we start somewhere (potentially) in
908 * the middle of the loop so we need to manully do this.
909 */
910 pos = start;
911 do {
912 struct list_head *waiting_list_head = &pos->srb_waiting_list;
913
914 /* Make sure, the next another device gets scheduled ... */
915 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
916 acb->dcb_run_robin);
917
918 if (list_empty(waiting_list_head) ||
919 pos->max_command <= list_size(&pos->srb_going_list)) {
920 /* move to next dcb */
921 pos = dcb_get_next(dcb_list_head, pos);
922 } else {
923 srb = list_entry(waiting_list_head->next,
924 struct ScsiReqBlk, list);
925
926 /* Try to send to the bus */
927 if (!start_scsi(acb, pos, srb))
928 srb_waiting_to_going_move(pos, srb);
929 else
930 waiting_set_timer(acb, HZ/50);
931 break;
932 }
933 } while (pos != start);
934 }
935
936
937 /* Wake up waiting queue */
938 static void waiting_timeout(unsigned long ptr)
939 {
940 unsigned long flags;
941 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
942 dprintkdbg(DBG_1,
943 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
944 DC395x_LOCK_IO(acb->scsi_host, flags);
945 waiting_process_next(acb);
946 DC395x_UNLOCK_IO(acb->scsi_host, flags);
947 }
948
949
950 /* Get the DCB for a given ID/LUN combination */
951 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
952 {
953 return acb->children[id][lun];
954 }
955
956
957 /* Send SCSI Request Block (srb) to adapter (acb) */
958 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
959 {
960 struct DeviceCtlBlk *dcb = srb->dcb;
961
962 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
963 acb->active_dcb ||
964 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
965 srb_waiting_append(dcb, srb);
966 waiting_process_next(acb);
967 return;
968 }
969
970 if (!start_scsi(acb, dcb, srb))
971 srb_going_append(dcb, srb);
972 else {
973 srb_waiting_insert(dcb, srb);
974 waiting_set_timer(acb, HZ / 50);
975 }
976 }
977
978
979 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
980 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
981 struct ScsiReqBlk *srb)
982 {
983 enum dma_data_direction dir = cmd->sc_data_direction;
984 dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
985 cmd->pid, dcb->target_id, dcb->target_lun);
986
987 srb->dcb = dcb;
988 srb->cmd = cmd;
989 srb->sg_count = 0;
990 srb->total_xfer_length = 0;
991 srb->sg_bus_addr = 0;
992 srb->virt_addr = NULL;
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 if (dir == PCI_DMA_NONE || !cmd->request_buffer) {
1006 dprintkdbg(DBG_0,
1007 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1008 cmd->bufflen, cmd->request_buffer,
1009 cmd->use_sg, srb->segment_x[0].address);
1010 } else if (cmd->use_sg) {
1011 int i;
1012 u32 reqlen = cmd->request_bufflen;
1013 struct scatterlist *sl = (struct scatterlist *)
1014 cmd->request_buffer;
1015 struct SGentry *sgp = srb->segment_x;
1016 srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg,
1017 dir);
1018 dprintkdbg(DBG_0,
1019 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1020 reqlen, cmd->request_buffer, cmd->use_sg,
1021 srb->sg_count);
1022
1023 srb->virt_addr = page_address(sl->page);
1024 for (i = 0; i < srb->sg_count; i++) {
1025 u32 busaddr = (u32)sg_dma_address(&sl[i]);
1026 u32 seglen = (u32)sl[i].length;
1027 sgp[i].address = busaddr;
1028 sgp[i].length = seglen;
1029 srb->total_xfer_length += seglen;
1030 }
1031 sgp += srb->sg_count - 1;
1032
1033 /*
1034 * adjust last page if too big as it is allocated
1035 * on even page boundaries
1036 */
1037 if (srb->total_xfer_length > reqlen) {
1038 sgp->length -= (srb->total_xfer_length - reqlen);
1039 srb->total_xfer_length = reqlen;
1040 }
1041
1042 /* Fixup for WIDE padding - make sure length is even */
1043 if (dcb->sync_period & WIDE_SYNC &&
1044 srb->total_xfer_length % 2) {
1045 srb->total_xfer_length++;
1046 sgp->length++;
1047 }
1048
1049 srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1050 srb->segment_x,
1051 SEGMENTX_LEN,
1052 PCI_DMA_TODEVICE);
1053
1054 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1055 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1056 } else {
1057 srb->total_xfer_length = cmd->request_bufflen;
1058 srb->sg_count = 1;
1059 srb->segment_x[0].address =
1060 pci_map_single(dcb->acb->dev, cmd->request_buffer,
1061 srb->total_xfer_length, dir);
1062
1063 /* Fixup for WIDE padding - make sure length is even */
1064 if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2)
1065 srb->total_xfer_length++;
1066
1067 srb->segment_x[0].length = srb->total_xfer_length;
1068 srb->virt_addr = cmd->request_buffer;
1069 dprintkdbg(DBG_0,
1070 "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n",
1071 srb->total_xfer_length, cmd->request_buffer,
1072 cmd->use_sg, srb->segment_x[0].address);
1073 }
1074 }
1075
1076
1077 /**
1078 * dc395x_queue_command - queue scsi command passed from the mid
1079 * layer, invoke 'done' on completion
1080 *
1081 * @cmd: pointer to scsi command object
1082 * @done: function pointer to be invoked on completion
1083 *
1084 * Returns 1 if the adapter (host) is busy, else returns 0. One
1085 * reason for an adapter to be busy is that the number
1086 * of outstanding queued commands is already equal to
1087 * struct Scsi_Host::can_queue .
1088 *
1089 * Required: if struct Scsi_Host::can_queue is ever non-zero
1090 * then this function is required.
1091 *
1092 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1093 * and is expected to be held on return.
1094 *
1095 **/
1096 static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1097 {
1098 struct DeviceCtlBlk *dcb;
1099 struct ScsiReqBlk *srb;
1100 struct AdapterCtlBlk *acb =
1101 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1102 dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n",
1103 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
1104
1105 /* Assume BAD_TARGET; will be cleared later */
1106 cmd->result = DID_BAD_TARGET << 16;
1107
1108 /* ignore invalid targets */
1109 if (cmd->device->id >= acb->scsi_host->max_id ||
1110 cmd->device->lun >= acb->scsi_host->max_lun ||
1111 cmd->device->lun >31) {
1112 goto complete;
1113 }
1114
1115 /* does the specified lun on the specified device exist */
1116 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1117 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1118 cmd->device->id, cmd->device->lun);
1119 goto complete;
1120 }
1121
1122 /* do we have a DCB for the device */
1123 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1124 if (!dcb) {
1125 /* should never happen */
1126 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1127 cmd->device->id, cmd->device->lun);
1128 goto complete;
1129 }
1130
1131 /* set callback and clear result in the command */
1132 cmd->scsi_done = done;
1133 cmd->result = 0;
1134
1135 srb = srb_get_free(acb);
1136 if (!srb)
1137 {
1138 /*
1139 * Return 1 since we are unable to queue this command at this
1140 * point in time.
1141 */
1142 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1143 return 1;
1144 }
1145
1146 build_srb(cmd, dcb, srb);
1147
1148 if (!list_empty(&dcb->srb_waiting_list)) {
1149 /* append to waiting queue */
1150 srb_waiting_append(dcb, srb);
1151 waiting_process_next(acb);
1152 } else {
1153 /* process immediately */
1154 send_srb(acb, srb);
1155 }
1156 dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid);
1157 return 0;
1158
1159 complete:
1160 /*
1161 * Complete the command immediatey, and then return 0 to
1162 * indicate that we have handled the command. This is usually
1163 * done when the commad is for things like non existent
1164 * devices.
1165 */
1166 done(cmd);
1167 return 0;
1168 }
1169
1170
1171 /*
1172 * Return the disk geometry for the given SCSI device.
1173 */
1174 static int dc395x_bios_param(struct scsi_device *sdev,
1175 struct block_device *bdev, sector_t capacity, int *info)
1176 {
1177 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1178 int heads, sectors, cylinders;
1179 struct AdapterCtlBlk *acb;
1180 int size = capacity;
1181
1182 dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1183 acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1184 heads = 64;
1185 sectors = 32;
1186 cylinders = size / (heads * sectors);
1187
1188 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1189 heads = 255;
1190 sectors = 63;
1191 cylinders = size / (heads * sectors);
1192 }
1193 geom[0] = heads;
1194 geom[1] = sectors;
1195 geom[2] = cylinders;
1196 return 0;
1197 #else
1198 return scsicam_bios_param(bdev, capacity, info);
1199 #endif
1200 }
1201
1202
1203 static void dump_register_info(struct AdapterCtlBlk *acb,
1204 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1205 {
1206 u16 pstat;
1207 struct pci_dev *dev = acb->dev;
1208 pci_read_config_word(dev, PCI_STATUS, &pstat);
1209 if (!dcb)
1210 dcb = acb->active_dcb;
1211 if (!srb && dcb)
1212 srb = dcb->active_srb;
1213 if (srb) {
1214 if (!srb->cmd)
1215 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1216 srb, srb->cmd);
1217 else
1218 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) "
1219 "cmnd=0x%02x <%02i-%i>\n",
1220 srb, srb->cmd, srb->cmd->pid,
1221 srb->cmd->cmnd[0], srb->cmd->device->id,
1222 srb->cmd->device->lun);
1223 printk(" sglist=%p cnt=%i idx=%i len=%i\n",
1224 srb->segment_x, srb->sg_count, srb->sg_index,
1225 srb->total_xfer_length);
1226 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1227 srb->state, srb->status, srb->scsi_phase,
1228 (acb->active_dcb) ? "" : "not");
1229 }
1230 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1231 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1232 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1233 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1234 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1235 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1236 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1237 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1238 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1239 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1240 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1241 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1242 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1243 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1244 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1245 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1246 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1247 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1248 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1249 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1250 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1251 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1252 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1253 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1254 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1255 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1256 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1257 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1258 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1259 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1260 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1261 "pci{status=0x%04x}\n",
1262 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1263 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1264 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1265 pstat);
1266 }
1267
1268
1269 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1270 {
1271 #if debug_enabled(DBG_FIFO)
1272 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1273 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1274 if (!(fifocnt & 0x40))
1275 dprintkdbg(DBG_FIFO,
1276 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1277 fifocnt & 0x3f, lines, txt);
1278 #endif
1279 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1280 }
1281
1282
1283 static void reset_dev_param(struct AdapterCtlBlk *acb)
1284 {
1285 struct DeviceCtlBlk *dcb;
1286 struct NvRamType *eeprom = &acb->eeprom;
1287 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1288
1289 list_for_each_entry(dcb, &acb->dcb_list, list) {
1290 u8 period_index;
1291
1292 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1293 dcb->sync_period = 0;
1294 dcb->sync_offset = 0;
1295
1296 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1297 period_index = eeprom->target[dcb->target_id].period & 0x07;
1298 dcb->min_nego_period = clock_period[period_index];
1299 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1300 || !(acb->config & HCC_WIDE_CARD))
1301 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1302 }
1303 }
1304
1305
1306 /*
1307 * perform a hard reset on the SCSI bus
1308 * @cmd - some command for this host (for fetching hooks)
1309 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1310 */
1311 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1312 {
1313 struct AdapterCtlBlk *acb =
1314 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1315 dprintkl(KERN_INFO,
1316 "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n",
1317 cmd->pid, cmd->device->id, cmd->device->lun, cmd);
1318
1319 if (timer_pending(&acb->waiting_timer))
1320 del_timer(&acb->waiting_timer);
1321
1322 /*
1323 * disable interrupt
1324 */
1325 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1326 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1327 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1328 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1329
1330 reset_scsi_bus(acb);
1331 udelay(500);
1332
1333 /* We may be in serious trouble. Wait some seconds */
1334 acb->scsi_host->last_reset =
1335 jiffies + 3 * HZ / 2 +
1336 HZ * acb->eeprom.delay_time;
1337
1338 /*
1339 * re-enable interrupt
1340 */
1341 /* Clear SCSI FIFO */
1342 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1343 clear_fifo(acb, "eh_bus_reset");
1344 /* Delete pending IRQ */
1345 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1346 set_basic_config(acb);
1347
1348 reset_dev_param(acb);
1349 doing_srb_done(acb, DID_RESET, cmd, 0);
1350 acb->active_dcb = NULL;
1351 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1352 waiting_process_next(acb);
1353
1354 return SUCCESS;
1355 }
1356
1357
1358 /*
1359 * abort an errant SCSI command
1360 * @cmd - command to be aborted
1361 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1362 */
1363 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1364 {
1365 /*
1366 * Look into our command queues: If it has not been sent already,
1367 * we remove it and return success. Otherwise fail.
1368 */
1369 struct AdapterCtlBlk *acb =
1370 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1371 struct DeviceCtlBlk *dcb;
1372 struct ScsiReqBlk *srb;
1373 dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n",
1374 cmd->pid, cmd->device->id, cmd->device->lun, cmd);
1375
1376 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1377 if (!dcb) {
1378 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1379 return FAILED;
1380 }
1381
1382 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1383 if (srb) {
1384 srb_waiting_remove(dcb, srb);
1385 pci_unmap_srb_sense(acb, srb);
1386 pci_unmap_srb(acb, srb);
1387 free_tag(dcb, srb);
1388 srb_free_insert(acb, srb);
1389 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1390 cmd->result = DID_ABORT << 16;
1391 return SUCCESS;
1392 }
1393 srb = find_cmd(cmd, &dcb->srb_going_list);
1394 if (srb) {
1395 dprintkl(KERN_DEBUG, "eh_abort: Command in progress");
1396 /* XXX: Should abort the command here */
1397 } else {
1398 dprintkl(KERN_DEBUG, "eh_abort: Command not found");
1399 }
1400 return FAILED;
1401 }
1402
1403
1404 /* SDTR */
1405 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1406 struct ScsiReqBlk *srb)
1407 {
1408 u8 *ptr = srb->msgout_buf + srb->msg_count;
1409 if (srb->msg_count > 1) {
1410 dprintkl(KERN_INFO,
1411 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1412 srb->msg_count, srb->msgout_buf[0],
1413 srb->msgout_buf[1]);
1414 return;
1415 }
1416 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1417 dcb->sync_offset = 0;
1418 dcb->min_nego_period = 200 >> 2;
1419 } else if (dcb->sync_offset == 0)
1420 dcb->sync_offset = SYNC_NEGO_OFFSET;
1421
1422 *ptr++ = MSG_EXTENDED; /* (01h) */
1423 *ptr++ = 3; /* length */
1424 *ptr++ = EXTENDED_SDTR; /* (01h) */
1425 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1426 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1427 srb->msg_count += 5;
1428 srb->state |= SRB_DO_SYNC_NEGO;
1429 }
1430
1431
1432 /* WDTR */
1433 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1434 struct ScsiReqBlk *srb)
1435 {
1436 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1437 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1438 u8 *ptr = srb->msgout_buf + srb->msg_count;
1439 if (srb->msg_count > 1) {
1440 dprintkl(KERN_INFO,
1441 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1442 srb->msg_count, srb->msgout_buf[0],
1443 srb->msgout_buf[1]);
1444 return;
1445 }
1446 *ptr++ = MSG_EXTENDED; /* (01h) */
1447 *ptr++ = 2; /* length */
1448 *ptr++ = EXTENDED_WDTR; /* (03h) */
1449 *ptr++ = wide;
1450 srb->msg_count += 4;
1451 srb->state |= SRB_DO_WIDE_NEGO;
1452 }
1453
1454
1455 #if 0
1456 /* Timer to work around chip flaw: When selecting and the bus is
1457 * busy, we sometimes miss a Selection timeout IRQ */
1458 void selection_timeout_missed(unsigned long ptr);
1459 /* Sets the timer to wake us up */
1460 static void selto_timer(struct AdapterCtlBlk *acb)
1461 {
1462 if (timer_pending(&acb->selto_timer))
1463 return;
1464 acb->selto_timer.function = selection_timeout_missed;
1465 acb->selto_timer.data = (unsigned long) acb;
1466 if (time_before
1467 (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
1468 acb->selto_timer.expires =
1469 acb->scsi_host->last_reset + HZ / 2 + 1;
1470 else
1471 acb->selto_timer.expires = jiffies + HZ + 1;
1472 add_timer(&acb->selto_timer);
1473 }
1474
1475
1476 void selection_timeout_missed(unsigned long ptr)
1477 {
1478 unsigned long flags;
1479 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1480 struct ScsiReqBlk *srb;
1481 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1482 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1483 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1484 return;
1485 }
1486 DC395x_LOCK_IO(acb->scsi_host, flags);
1487 srb = acb->active_dcb->active_srb;
1488 disconnect(acb);
1489 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1490 }
1491 #endif
1492
1493
1494 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1495 struct ScsiReqBlk* srb)
1496 {
1497 u16 s_stat2, return_code;
1498 u8 s_stat, scsicommand, i, identify_message;
1499 u8 *ptr;
1500 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n",
1501 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
1502
1503 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1504
1505 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1506 s_stat2 = 0;
1507 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1508 #if 1
1509 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1510 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n",
1511 srb->cmd->pid, s_stat, s_stat2);
1512 /*
1513 * Try anyway?
1514 *
1515 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1516 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed!
1517 * (This is likely to be a bug in the hardware. Obviously, most people
1518 * only have one initiator per SCSI bus.)
1519 * Instead let this fail and have the timer make sure the command is
1520 * tried again after a short time
1521 */
1522 /*selto_timer (acb); */
1523 return 1;
1524 }
1525 #endif
1526 if (acb->active_dcb) {
1527 dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a"
1528 "command while another command (pid#%li) is active.",
1529 srb->cmd->pid,
1530 acb->active_dcb->active_srb ?
1531 acb->active_dcb->active_srb->cmd->pid : 0);
1532 return 1;
1533 }
1534 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1535 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n",
1536 srb->cmd->pid);
1537 return 1;
1538 }
1539 /* Allow starting of SCSI commands half a second before we allow the mid-level
1540 * to queue them again after a reset */
1541 if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
1542 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1543 return 1;
1544 }
1545
1546 /* Flush FIFO */
1547 clear_fifo(acb, "start_scsi");
1548 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1549 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1550 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1551 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1552 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1553
1554 identify_message = dcb->identify_msg;
1555 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1556 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1557 if (srb->flag & AUTO_REQSENSE)
1558 identify_message &= 0xBF;
1559
1560 if (((srb->cmd->cmnd[0] == INQUIRY)
1561 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1562 || (srb->flag & AUTO_REQSENSE))
1563 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1564 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1565 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1566 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1567 && (dcb->target_lun == 0)) {
1568 srb->msgout_buf[0] = identify_message;
1569 srb->msg_count = 1;
1570 scsicommand = SCMD_SEL_ATNSTOP;
1571 srb->state = SRB_MSGOUT;
1572 #ifndef SYNC_FIRST
1573 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1574 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1575 build_wdtr(acb, dcb, srb);
1576 goto no_cmd;
1577 }
1578 #endif
1579 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1580 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1581 build_sdtr(acb, dcb, srb);
1582 goto no_cmd;
1583 }
1584 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1585 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1586 build_wdtr(acb, dcb, srb);
1587 goto no_cmd;
1588 }
1589 srb->msg_count = 0;
1590 }
1591 /* Send identify message */
1592 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1593
1594 scsicommand = SCMD_SEL_ATN;
1595 srb->state = SRB_START_;
1596 #ifndef DC395x_NO_TAGQ
1597 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1598 && (identify_message & 0xC0)) {
1599 /* Send Tag message */
1600 u32 tag_mask = 1;
1601 u8 tag_number = 0;
1602 while (tag_mask & dcb->tag_mask
1603 && tag_number <= dcb->max_command) {
1604 tag_mask = tag_mask << 1;
1605 tag_number++;
1606 }
1607 if (tag_number >= dcb->max_command) {
1608 dprintkl(KERN_WARNING, "start_scsi: (pid#%li) "
1609 "Out of tags target=<%02i-%i>)\n",
1610 srb->cmd->pid, srb->cmd->device->id,
1611 srb->cmd->device->lun);
1612 srb->state = SRB_READY;
1613 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1614 DO_HWRESELECT);
1615 return 1;
1616 }
1617 /* Send Tag id */
1618 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1619 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1620 dcb->tag_mask |= tag_mask;
1621 srb->tag_number = tag_number;
1622 scsicommand = SCMD_SEL_ATN3;
1623 srb->state = SRB_START_;
1624 }
1625 #endif
1626 /*polling:*/
1627 /* Send CDB ..command block ......... */
1628 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n",
1629 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
1630 srb->cmd->cmnd[0], srb->tag_number);
1631 if (srb->flag & AUTO_REQSENSE) {
1632 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1633 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1634 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1635 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1636 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
1637 sizeof(srb->cmd->sense_buffer));
1638 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1639 } else {
1640 ptr = (u8 *)srb->cmd->cmnd;
1641 for (i = 0; i < srb->cmd->cmd_len; i++)
1642 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1643 }
1644 no_cmd:
1645 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1646 DO_HWRESELECT | DO_DATALATCH);
1647 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1648 /*
1649 * If start_scsi return 1:
1650 * we caught an interrupt (must be reset or reselection ... )
1651 * : Let's process it first!
1652 */
1653 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
1654 srb->cmd->pid, dcb->target_id, dcb->target_lun);
1655 srb->state = SRB_READY;
1656 free_tag(dcb, srb);
1657 srb->msg_count = 0;
1658 return_code = 1;
1659 /* This IRQ should NOT get lost, as we did not acknowledge it */
1660 } else {
1661 /*
1662 * If start_scsi returns 0:
1663 * we know that the SCSI processor is free
1664 */
1665 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1666 dcb->active_srb = srb;
1667 acb->active_dcb = dcb;
1668 return_code = 0;
1669 /* it's important for atn stop */
1670 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1671 DO_DATALATCH | DO_HWRESELECT);
1672 /* SCSI command */
1673 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1674 }
1675 return return_code;
1676 }
1677
1678
1679 #define DC395x_ENABLE_MSGOUT \
1680 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1681 srb->state |= SRB_MSGOUT
1682
1683
1684 /* abort command */
1685 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1686 struct ScsiReqBlk *srb)
1687 {
1688 srb->msgout_buf[0] = ABORT;
1689 srb->msg_count = 1;
1690 DC395x_ENABLE_MSGOUT;
1691 srb->state &= ~SRB_MSGIN;
1692 srb->state |= SRB_MSGOUT;
1693 }
1694
1695
1696 /**
1697 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1698 * have been triggered for this card.
1699 *
1700 * @acb: a pointer to the adpter control block
1701 * @scsi_status: the status return when we checked the card
1702 **/
1703 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1704 u16 scsi_status)
1705 {
1706 struct DeviceCtlBlk *dcb;
1707 struct ScsiReqBlk *srb;
1708 u16 phase;
1709 u8 scsi_intstatus;
1710 unsigned long flags;
1711 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1712 u16 *);
1713
1714 DC395x_LOCK_IO(acb->scsi_host, flags);
1715
1716 /* This acknowledges the IRQ */
1717 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1718 if ((scsi_status & 0x2007) == 0x2002)
1719 dprintkl(KERN_DEBUG,
1720 "COP after COP completed? %04x\n", scsi_status);
1721 if (debug_enabled(DBG_KG)) {
1722 if (scsi_intstatus & INT_SELTIMEOUT)
1723 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1724 }
1725 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1726
1727 if (timer_pending(&acb->selto_timer))
1728 del_timer(&acb->selto_timer);
1729
1730 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1731 disconnect(acb); /* bus free interrupt */
1732 goto out_unlock;
1733 }
1734 if (scsi_intstatus & INT_RESELECTED) {
1735 reselect(acb);
1736 goto out_unlock;
1737 }
1738 if (scsi_intstatus & INT_SELECT) {
1739 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1740 goto out_unlock;
1741 }
1742 if (scsi_intstatus & INT_SCSIRESET) {
1743 scsi_reset_detect(acb);
1744 goto out_unlock;
1745 }
1746 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1747 dcb = acb->active_dcb;
1748 if (!dcb) {
1749 dprintkl(KERN_DEBUG,
1750 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1751 scsi_status, scsi_intstatus);
1752 goto out_unlock;
1753 }
1754 srb = dcb->active_srb;
1755 if (dcb->flag & ABORT_DEV_) {
1756 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1757 enable_msgout_abort(acb, srb);
1758 }
1759
1760 /* software sequential machine */
1761 phase = (u16)srb->scsi_phase;
1762
1763 /*
1764 * 62037 or 62137
1765 * call dc395x_scsi_phase0[]... "phase entry"
1766 * handle every phase before start transfer
1767 */
1768 /* data_out_phase0, phase:0 */
1769 /* data_in_phase0, phase:1 */
1770 /* command_phase0, phase:2 */
1771 /* status_phase0, phase:3 */
1772 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1773 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1774 /* msgout_phase0, phase:6 */
1775 /* msgin_phase0, phase:7 */
1776 dc395x_statev = dc395x_scsi_phase0[phase];
1777 dc395x_statev(acb, srb, &scsi_status);
1778
1779 /*
1780 * if there were any exception occured scsi_status
1781 * will be modify to bus free phase new scsi_status
1782 * transfer out from ... previous dc395x_statev
1783 */
1784 srb->scsi_phase = scsi_status & PHASEMASK;
1785 phase = (u16)scsi_status & PHASEMASK;
1786
1787 /*
1788 * call dc395x_scsi_phase1[]... "phase entry" handle
1789 * every phase to do transfer
1790 */
1791 /* data_out_phase1, phase:0 */
1792 /* data_in_phase1, phase:1 */
1793 /* command_phase1, phase:2 */
1794 /* status_phase1, phase:3 */
1795 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1796 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1797 /* msgout_phase1, phase:6 */
1798 /* msgin_phase1, phase:7 */
1799 dc395x_statev = dc395x_scsi_phase1[phase];
1800 dc395x_statev(acb, srb, &scsi_status);
1801 }
1802 out_unlock:
1803 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1804 }
1805
1806
1807 static irqreturn_t dc395x_interrupt(int irq, void *dev_id,
1808 struct pt_regs *regs)
1809 {
1810 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)dev_id;
1811 u16 scsi_status;
1812 u8 dma_status;
1813 irqreturn_t handled = IRQ_NONE;
1814
1815 /*
1816 * Check for pending interupt
1817 */
1818 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1819 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1820 if (scsi_status & SCSIINTERRUPT) {
1821 /* interupt pending - let's process it! */
1822 dc395x_handle_interrupt(acb, scsi_status);
1823 handled = IRQ_HANDLED;
1824 }
1825 else if (dma_status & 0x20) {
1826 /* Error from the DMA engine */
1827 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1828 #if 0
1829 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1830 if (acb->active_dcb) {
1831 acb->active_dcb-> flag |= ABORT_DEV_;
1832 if (acb->active_dcb->active_srb)
1833 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1834 }
1835 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1836 #else
1837 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1838 acb = NULL;
1839 #endif
1840 handled = IRQ_HANDLED;
1841 }
1842
1843 return handled;
1844 }
1845
1846
1847 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1848 u16 *pscsi_status)
1849 {
1850 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid);
1851 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1852 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1853
1854 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1855 srb->state &= ~SRB_MSGOUT;
1856 }
1857
1858
1859 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1860 u16 *pscsi_status)
1861 {
1862 u16 i;
1863 u8 *ptr;
1864 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid);
1865
1866 clear_fifo(acb, "msgout_phase1");
1867 if (!(srb->state & SRB_MSGOUT)) {
1868 srb->state |= SRB_MSGOUT;
1869 dprintkl(KERN_DEBUG,
1870 "msgout_phase1: (pid#%li) Phase unexpected\n",
1871 srb->cmd->pid); /* So what ? */
1872 }
1873 if (!srb->msg_count) {
1874 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
1875 srb->cmd->pid);
1876 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1877 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1878 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1879 return;
1880 }
1881 ptr = (u8 *)srb->msgout_buf;
1882 for (i = 0; i < srb->msg_count; i++)
1883 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1884 srb->msg_count = 0;
1885 if (srb->msgout_buf[0] == MSG_ABORT)
1886 srb->state = SRB_ABORT_SENT;
1887
1888 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1889 }
1890
1891
1892 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1893 u16 *pscsi_status)
1894 {
1895 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid);
1896 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1897 }
1898
1899
1900 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1901 u16 *pscsi_status)
1902 {
1903 struct DeviceCtlBlk *dcb;
1904 u8 *ptr;
1905 u16 i;
1906 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid);
1907
1908 clear_fifo(acb, "command_phase1");
1909 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1910 if (!(srb->flag & AUTO_REQSENSE)) {
1911 ptr = (u8 *)srb->cmd->cmnd;
1912 for (i = 0; i < srb->cmd->cmd_len; i++) {
1913 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1914 ptr++;
1915 }
1916 } else {
1917 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1918 dcb = acb->active_dcb;
1919 /* target id */
1920 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1921 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1922 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1923 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
1924 sizeof(srb->cmd->sense_buffer));
1925 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1926 }
1927 srb->state |= SRB_COMMAND;
1928 /* it's important for atn stop */
1929 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1930 /* SCSI command */
1931 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1932 }
1933
1934
1935 /*
1936 * Verify that the remaining space in the hw sg lists is the same as
1937 * the count of remaining bytes in srb->total_xfer_length
1938 */
1939 static void sg_verify_length(struct ScsiReqBlk *srb)
1940 {
1941 if (debug_enabled(DBG_SG)) {
1942 unsigned len = 0;
1943 unsigned idx = srb->sg_index;
1944 struct SGentry *psge = srb->segment_x + idx;
1945 for (; idx < srb->sg_count; psge++, idx++)
1946 len += psge->length;
1947 if (len != srb->total_xfer_length)
1948 dprintkdbg(DBG_SG,
1949 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1950 srb->total_xfer_length, len);
1951 }
1952 }
1953
1954
1955 /*
1956 * Compute the next Scatter Gather list index and adjust its length
1957 * and address if necessary; also compute virt_addr
1958 */
1959 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1960 {
1961 u8 idx;
1962 struct scatterlist *sg;
1963 struct scsi_cmnd *cmd = srb->cmd;
1964 int segment = cmd->use_sg;
1965 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
1966 struct SGentry *psge = srb->segment_x + srb->sg_index;
1967
1968 dprintkdbg(DBG_0,
1969 "sg_update_list: Transfered %i of %i bytes, %i remain\n",
1970 xferred, srb->total_xfer_length, left);
1971 if (xferred == 0) {
1972 /* nothing to update since we did not transfer any data */
1973 return;
1974 }
1975
1976 sg_verify_length(srb);
1977 srb->total_xfer_length = left; /* update remaining count */
1978 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1979 if (xferred >= psge->length) {
1980 /* Complete SG entries done */
1981 xferred -= psge->length;
1982 } else {
1983 /* Partial SG entry done */
1984 psge->length -= xferred;
1985 psge->address += xferred;
1986 srb->sg_index = idx;
1987 pci_dma_sync_single_for_device(srb->dcb->
1988 acb->dev,
1989 srb->sg_bus_addr,
1990 SEGMENTX_LEN,
1991 PCI_DMA_TODEVICE);
1992 break;
1993 }
1994 psge++;
1995 }
1996 sg_verify_length(srb);
1997
1998 /* we need the corresponding virtual address */
1999 if (!segment) {
2000 srb->virt_addr += xferred;
2001 return;
2002 }
2003
2004 /* We have to walk the scatterlist to find it */
2005 sg = (struct scatterlist *)cmd->request_buffer;
2006 while (segment--) {
2007 unsigned long mask =
2008 ~((unsigned long)sg->length - 1) & PAGE_MASK;
2009 if ((sg_dma_address(sg) & mask) == (psge->address & mask)) {
2010 srb->virt_addr = (page_address(sg->page)
2011 + psge->address -
2012 (psge->address & PAGE_MASK));
2013 return;
2014 }
2015 ++sg;
2016 }
2017
2018 dprintkl(KERN_ERR, "sg_update_list: sg_to_virt failed\n");
2019 srb->virt_addr = NULL;
2020 }
2021
2022
2023 /*
2024 * We have transfered a single byte (PIO mode?) and need to update
2025 * the count of bytes remaining (total_xfer_length) and update the sg
2026 * entry to either point to next byte in the current sg entry, or of
2027 * already at the end to point to the start of the next sg entry
2028 */
2029 static void sg_subtract_one(struct ScsiReqBlk *srb)
2030 {
2031 srb->total_xfer_length--;
2032 srb->segment_x[srb->sg_index].length--;
2033 if (srb->total_xfer_length &&
2034 !srb->segment_x[srb->sg_index].length) {
2035 if (debug_enabled(DBG_PIO))
2036 printk(" (next segment)");
2037 srb->sg_index++;
2038 sg_update_list(srb, srb->total_xfer_length);
2039 }
2040 }
2041
2042
2043 /*
2044 * cleanup_after_transfer
2045 *
2046 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2047 * KG: Currently called from StatusPhase1 ()
2048 * Should probably also be called from other places
2049 * Best might be to call it in DataXXPhase0, if new phase will differ
2050 */
2051 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2052 struct ScsiReqBlk *srb)
2053 {
2054 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2055 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2056 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2057 clear_fifo(acb, "cleanup/in");
2058 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2059 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2060 } else { /* write */
2061 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2062 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2063 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2064 clear_fifo(acb, "cleanup/out");
2065 }
2066 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2067 }
2068
2069
2070 /*
2071 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
2072 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2073 */
2074 #define DC395x_LASTPIO 4
2075
2076
2077 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2078 u16 *pscsi_status)
2079 {
2080 struct DeviceCtlBlk *dcb = srb->dcb;
2081 u16 scsi_status = *pscsi_status;
2082 u32 d_left_counter = 0;
2083 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
2084 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2085
2086 /*
2087 * KG: We need to drain the buffers before we draw any conclusions!
2088 * This means telling the DMA to push the rest into SCSI, telling
2089 * SCSI to push the rest to the bus.
2090 * However, the device might have been the one to stop us (phase
2091 * change), and the data in transit just needs to be accounted so
2092 * it can be retransmitted.)
2093 */
2094 /*
2095 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2096 * If we need more data, the DMA SG list will be freshly set up, anyway
2097 */
2098 dprintkdbg(DBG_PIO, "data_out_phase0: "
2099 "DMA{fifcnt=0x%02x fifostat=0x%02x} "
2100 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2101 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2102 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2103 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2104 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2105 srb->total_xfer_length);
2106 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2107
2108 if (!(srb->state & SRB_XFERPAD)) {
2109 if (scsi_status & PARITYERROR)
2110 srb->status |= PARITY_ERROR;
2111
2112 /*
2113 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2114 * is the no of bytes it got from the DMA engine not the no it
2115 * transferred successfully to the device. (And the difference could
2116 * be as much as the FIFO size, I guess ...)
2117 */
2118 if (!(scsi_status & SCSIXFERDONE)) {
2119 /*
2120 * when data transfer from DMA FIFO to SCSI FIFO
2121 * if there was some data left in SCSI FIFO
2122 */
2123 d_left_counter =
2124 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2125 0x1F);
2126 if (dcb->sync_period & WIDE_SYNC)
2127 d_left_counter <<= 1;
2128
2129 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2130 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2131 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2132 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2133 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2134 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2135 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2136 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2137 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2138 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2139 }
2140 /*
2141 * calculate all the residue data that not yet tranfered
2142 * SCSI transfer counter + left in SCSI FIFO data
2143 *
2144 * .....TRM_S1040_SCSI_COUNTER (24bits)
2145 * The counter always decrement by one for every SCSI byte transfer.
2146 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2147 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2148 */
2149 if (srb->total_xfer_length > DC395x_LASTPIO)
2150 d_left_counter +=
2151 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2152
2153 /* Is this a good idea? */
2154 /*clear_fifo(acb, "DOP1"); */
2155 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2156 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2157 && srb->cmd->request_bufflen % 2) {
2158 d_left_counter = 0;
2159 dprintkl(KERN_INFO,
2160 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2161 scsi_status);
2162 }
2163 /*
2164 * KG: Oops again. Same thinko as above: The SCSI might have been
2165 * faster than the DMA engine, so that it ran out of data.
2166 * In that case, we have to do just nothing!
2167 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2168 */
2169 /*
2170 * KG: This is nonsense: We have been WRITING data to the bus
2171 * If the SCSI engine has no bytes left, how should the DMA engine?
2172 */
2173 if (d_left_counter == 0) {
2174 srb->total_xfer_length = 0;
2175 } else {
2176 /*
2177 * if transfer not yet complete
2178 * there were some data residue in SCSI FIFO or
2179 * SCSI transfer counter not empty
2180 */
2181 long oldxferred =
2182 srb->total_xfer_length - d_left_counter;
2183 const int diff =
2184 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2185 sg_update_list(srb, d_left_counter);
2186 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2187 if ((srb->segment_x[srb->sg_index].length ==
2188 diff && srb->cmd->use_sg)
2189 || ((oldxferred & ~PAGE_MASK) ==
2190 (PAGE_SIZE - diff))
2191 ) {
2192 dprintkl(KERN_INFO, "data_out_phase0: "
2193 "Work around chip bug (%i)?\n", diff);
2194 d_left_counter =
2195 srb->total_xfer_length - diff;
2196 sg_update_list(srb, d_left_counter);
2197 /*srb->total_xfer_length -= diff; */
2198 /*srb->virt_addr += diff; */
2199 /*if (srb->cmd->use_sg) */
2200 /* srb->sg_index++; */
2201 }
2202 }
2203 }
2204 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2205 cleanup_after_transfer(acb, srb);
2206 }
2207 }
2208
2209
2210 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2211 u16 *pscsi_status)
2212 {
2213 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
2214 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2215 clear_fifo(acb, "data_out_phase1");
2216 /* do prepare before transfer when data out phase */
2217 data_io_transfer(acb, srb, XFERDATAOUT);
2218 }
2219
2220
2221 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2222 u16 *pscsi_status)
2223 {
2224 u16 scsi_status = *pscsi_status;
2225 u32 d_left_counter = 0;
2226 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
2227 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2228
2229 /*
2230 * KG: DataIn is much more tricky than DataOut. When the device is finished
2231 * and switches to another phase, the SCSI engine should be finished too.
2232 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2233 * engine and transferred to memory.
2234 * We should wait for the FIFOs to be emptied by that (is there any way to
2235 * enforce this?) and then stop the DMA engine, because it might think, that
2236 * there are more bytes to follow. Yes, the device might disconnect prior to
2237 * having all bytes transferred!
2238 * Also we should make sure that all data from the DMA engine buffer's really
2239 * made its way to the system memory! Some documentation on this would not
2240 * seem to be a bad idea, actually.
2241 */
2242 if (!(srb->state & SRB_XFERPAD)) {
2243 if (scsi_status & PARITYERROR) {
2244 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
2245 "Parity Error\n", srb->cmd->pid);
2246 srb->status |= PARITY_ERROR;
2247 }
2248 /*
2249 * KG: We should wait for the DMA FIFO to be empty ...
2250 * but: it would be better to wait first for the SCSI FIFO and then the
2251 * the DMA FIFO to become empty? How do we know, that the device not already
2252 * sent data to the FIFO in a MsgIn phase, eg.?
2253 */
2254 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2255 #if 0
2256 int ctr = 6000000;
2257 dprintkl(KERN_DEBUG,
2258 "DIP0: Wait for DMA FIFO to flush ...\n");
2259 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2260 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2261 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2262 while (!
2263 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2264 0x80) && --ctr);
2265 if (ctr < 6000000 - 1)
2266 dprintkl(KERN_DEBUG
2267 "DIP0: Had to wait for DMA ...\n");
2268 if (!ctr)
2269 dprintkl(KERN_ERR,
2270 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2271 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2272 #endif
2273 dprintkdbg(DBG_KG, "data_in_phase0: "
2274 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2275 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2276 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2277 }
2278 /* Now: Check remainig data: The SCSI counters should tell us ... */
2279 d_left_counter = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER)
2280 + ((DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f)
2281 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2282 0));
2283 dprintkdbg(DBG_KG, "data_in_phase0: "
2284 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2285 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2286 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2287 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2288 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2289 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2290 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2291 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2292 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2293 srb->total_xfer_length, d_left_counter);
2294 #if DC395x_LASTPIO
2295 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
2296 if (d_left_counter
2297 && srb->total_xfer_length <= DC395x_LASTPIO) {
2298 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2299 /*sg_update_list (srb, d_left_counter); */
2300 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) to "
2301 "%p for remaining %i bytes:",
2302 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f,
2303 (srb->dcb->sync_period & WIDE_SYNC) ?
2304 "words" : "bytes",
2305 srb->virt_addr,
2306 srb->total_xfer_length);
2307 if (srb->dcb->sync_period & WIDE_SYNC)
2308 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2309 CFG2_WIDEFIFO);
2310 while (DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) != 0x40) {
2311 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2312 *(srb->virt_addr)++ = byte;
2313 if (debug_enabled(DBG_PIO))
2314 printk(" %02x", byte);
2315 d_left_counter--;
2316 sg_subtract_one(srb);
2317 }
2318 if (srb->dcb->sync_period & WIDE_SYNC) {
2319 #if 1
2320 /* Read the last byte ... */
2321 if (srb->total_xfer_length > 0) {
2322 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2323 *(srb->virt_addr)++ = byte;
2324 srb->total_xfer_length--;
2325 if (debug_enabled(DBG_PIO))
2326 printk(" %02x", byte);
2327 }
2328 #endif
2329 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2330 }
2331 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2332 /*srb->total_xfer_length = 0; */
2333 if (debug_enabled(DBG_PIO))
2334 printk("\n");
2335 }
2336 #endif /* DC395x_LASTPIO */
2337
2338 #if 0
2339 /*
2340 * KG: This was in DATAOUT. Does it also belong here?
2341 * Nobody seems to know what counter and fifo_cnt count exactly ...
2342 */
2343 if (!(scsi_status & SCSIXFERDONE)) {
2344 /*
2345 * when data transfer from DMA FIFO to SCSI FIFO
2346 * if there was some data left in SCSI FIFO
2347 */
2348 d_left_counter =
2349 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2350 0x1F);
2351 if (srb->dcb->sync_period & WIDE_SYNC)
2352 d_left_counter <<= 1;
2353 /*
2354 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2355 * so need to *= 2
2356 * KG: Seems to be correct ...
2357 */
2358 }
2359 #endif
2360 /* KG: This should not be needed any more! */
2361 if (d_left_counter == 0
2362 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2363 #if 0
2364 int ctr = 6000000;
2365 u8 TempDMAstatus;
2366 do {
2367 TempDMAstatus =
2368 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2369 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2370 if (!ctr)
2371 dprintkl(KERN_ERR,
2372 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2373 srb->total_xfer_length = 0;
2374 #endif
2375 srb->total_xfer_length = d_left_counter;
2376 } else { /* phase changed */
2377 /*
2378 * parsing the case:
2379 * when a transfer not yet complete
2380 * but be disconnected by target
2381 * if transfer not yet complete
2382 * there were some data residue in SCSI FIFO or
2383 * SCSI transfer counter not empty
2384 */
2385 sg_update_list(srb, d_left_counter);
2386 }
2387 }
2388 /* KG: The target may decide to disconnect: Empty FIFO before! */
2389 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2390 cleanup_after_transfer(acb, srb);
2391 }
2392 }
2393
2394
2395 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2396 u16 *pscsi_status)
2397 {
2398 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
2399 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2400 data_io_transfer(acb, srb, XFERDATAIN);
2401 }
2402
2403
2404 static void data_io_transfer(struct AdapterCtlBlk *acb,
2405 struct ScsiReqBlk *srb, u16 io_dir)
2406 {
2407 struct DeviceCtlBlk *dcb = srb->dcb;
2408 u8 bval;
2409 dprintkdbg(DBG_0,
2410 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2411 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
2412 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2413 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2414 if (srb == acb->tmp_srb)
2415 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2416 if (srb->sg_index >= srb->sg_count) {
2417 /* can't happen? out of bounds error */
2418 return;
2419 }
2420
2421 if (srb->total_xfer_length > DC395x_LASTPIO) {
2422 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2423 /*
2424 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2425 * Maybe, even ABORTXFER would be appropriate
2426 */
2427 if (dma_status & XFERPENDING) {
2428 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2429 "Expect trouble!\n");
2430 dump_register_info(acb, dcb, srb);
2431 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2432 }
2433 /* clear_fifo(acb, "IO"); */
2434 /*
2435 * load what physical address of Scatter/Gather list table
2436 * want to be transfer
2437 */
2438 srb->state |= SRB_DATA_XFER;
2439 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2440 if (srb->cmd->use_sg) { /* with S/G */
2441 io_dir |= DMACMD_SG;
2442 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2443 srb->sg_bus_addr +
2444 sizeof(struct SGentry) *
2445 srb->sg_index);
2446 /* load how many bytes in the sg list table */
2447 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2448 ((u32)(srb->sg_count -
2449 srb->sg_index) << 3));
2450 } else { /* without S/G */
2451 io_dir &= ~DMACMD_SG;
2452 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2453 srb->segment_x[0].address);
2454 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2455 srb->segment_x[0].length);
2456 }
2457 /* load total transfer length (24bits) max value 16Mbyte */
2458 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2459 srb->total_xfer_length);
2460 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2461 if (io_dir & DMACMD_DIR) { /* read */
2462 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2463 SCMD_DMA_IN);
2464 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2465 } else {
2466 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2467 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2468 SCMD_DMA_OUT);
2469 }
2470
2471 }
2472 #if DC395x_LASTPIO
2473 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2474 /*
2475 * load what physical address of Scatter/Gather list table
2476 * want to be transfer
2477 */
2478 srb->state |= SRB_DATA_XFER;
2479 /* load total transfer length (24bits) max value 16Mbyte */
2480 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2481 srb->total_xfer_length);
2482 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2483 if (io_dir & DMACMD_DIR) { /* read */
2484 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2485 SCMD_FIFO_IN);
2486 } else { /* write */
2487 int ln = srb->total_xfer_length;
2488 if (srb->dcb->sync_period & WIDE_SYNC)
2489 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2490 CFG2_WIDEFIFO);
2491 dprintkdbg(DBG_PIO,
2492 "data_io_transfer: PIO %i bytes from %p:",
2493 srb->total_xfer_length, srb->virt_addr);
2494
2495 while (srb->total_xfer_length) {
2496 if (debug_enabled(DBG_PIO))
2497 printk(" %02x", (unsigned char) *(srb->virt_addr));
2498
2499 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
2500 *(srb->virt_addr)++);
2501
2502 sg_subtract_one(srb);
2503 }
2504 if (srb->dcb->sync_period & WIDE_SYNC) {
2505 if (ln % 2) {
2506 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2507 if (debug_enabled(DBG_PIO))
2508 printk(" |00");
2509 }
2510 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2511 }
2512 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2513 if (debug_enabled(DBG_PIO))
2514 printk("\n");
2515 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2516 SCMD_FIFO_OUT);
2517 }
2518 }
2519 #endif /* DC395x_LASTPIO */
2520 else { /* xfer pad */
2521 u8 data = 0, data2 = 0;
2522 if (srb->sg_count) {
2523 srb->adapter_status = H_OVER_UNDER_RUN;
2524 srb->status |= OVER_RUN;
2525 }
2526 /*
2527 * KG: despite the fact that we are using 16 bits I/O ops
2528 * the SCSI FIFO is only 8 bits according to the docs
2529 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2530 */
2531 if (dcb->sync_period & WIDE_SYNC) {
2532 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2533 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2534 CFG2_WIDEFIFO);
2535 if (io_dir & DMACMD_DIR) {
2536 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2537 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2538 } else {
2539 /* Danger, Robinson: If you find KGs
2540 * scattered over the wide disk, the driver
2541 * or chip is to blame :-( */
2542 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2543 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2544 }
2545 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2546 } else {
2547 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2548 /* Danger, Robinson: If you find a collection of Ks on your disk
2549 * something broke :-( */
2550 if (io_dir & DMACMD_DIR)
2551 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2552 else
2553 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2554 }
2555 srb->state |= SRB_XFERPAD;
2556 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2557 /* SCSI command */
2558 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2559 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2560 }
2561 }
2562
2563
2564 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2565 u16 *pscsi_status)
2566 {
2567 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
2568 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2569 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2570 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2571 srb->state = SRB_COMPLETED;
2572 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2573 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2574 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2575 }
2576
2577
2578 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2579 u16 *pscsi_status)
2580 {
2581 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
2582 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2583 srb->state = SRB_STATUS;
2584 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2585 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2586 }
2587
2588
2589 /* Check if the message is complete */
2590 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2591 {
2592 if (*msgbuf == EXTENDED_MESSAGE) {
2593 if (len < 2)
2594 return 0;
2595 if (len < msgbuf[1] + 2)
2596 return 0;
2597 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2598 if (len < 2)
2599 return 0;
2600 return 1;
2601 }
2602
2603 /* reject_msg */
2604 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2605 struct ScsiReqBlk *srb)
2606 {
2607 srb->msgout_buf[0] = MESSAGE_REJECT;
2608 srb->msg_count = 1;
2609 DC395x_ENABLE_MSGOUT;
2610 srb->state &= ~SRB_MSGIN;
2611 srb->state |= SRB_MSGOUT;
2612 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2613 srb->msgin_buf[0],
2614 srb->dcb->target_id, srb->dcb->target_lun);
2615 }
2616
2617
2618 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2619 struct DeviceCtlBlk *dcb, u8 tag)
2620 {
2621 struct ScsiReqBlk *srb = NULL;
2622 struct ScsiReqBlk *i;
2623 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
2624 srb->cmd->pid, tag, srb);
2625
2626 if (!(dcb->tag_mask & (1 << tag)))
2627 dprintkl(KERN_DEBUG,
2628 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2629 dcb->tag_mask, tag);
2630
2631 if (list_empty(&dcb->srb_going_list))
2632 goto mingx0;
2633 list_for_each_entry(i, &dcb->srb_going_list, list) {
2634 if (i->tag_number == tag) {
2635 srb = i;
2636 break;
2637 }
2638 }
2639 if (!srb)
2640 goto mingx0;
2641
2642 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
2643 srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun);
2644 if (dcb->flag & ABORT_DEV_) {
2645 /*srb->state = SRB_ABORT_SENT; */
2646 enable_msgout_abort(acb, srb);
2647 }
2648
2649 if (!(srb->state & SRB_DISCONNECT))
2650 goto mingx0;
2651
2652 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2653 srb->state |= dcb->active_srb->state;
2654 srb->state |= SRB_DATA_XFER;
2655 dcb->active_srb = srb;
2656 /* How can we make the DORS happy? */
2657 return srb;
2658
2659 mingx0:
2660 srb = acb->tmp_srb;
2661 srb->state = SRB_UNEXPECT_RESEL;
2662 dcb->active_srb = srb;
2663 srb->msgout_buf[0] = MSG_ABORT_TAG;
2664 srb->msg_count = 1;
2665 DC395x_ENABLE_MSGOUT;
2666 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2667 return srb;
2668 }
2669
2670
2671 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2672 struct DeviceCtlBlk *dcb)
2673 {
2674 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2675 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2676 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2677 set_xfer_rate(acb, dcb);
2678 }
2679
2680
2681 /* set async transfer mode */
2682 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2683 {
2684 struct DeviceCtlBlk *dcb = srb->dcb;
2685 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2686 dcb->target_id, dcb->target_lun);
2687
2688 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2689 dcb->sync_mode |= SYNC_NEGO_DONE;
2690 /*dcb->sync_period &= 0; */
2691 dcb->sync_offset = 0;
2692 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2693 srb->state &= ~SRB_DO_SYNC_NEGO;
2694 reprogram_regs(acb, dcb);
2695 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2696 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2697 build_wdtr(acb, dcb, srb);
2698 DC395x_ENABLE_MSGOUT;
2699 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2700 }
2701 }
2702
2703
2704 /* set sync transfer mode */
2705 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2706 {
2707 struct DeviceCtlBlk *dcb = srb->dcb;
2708 u8 bval;
2709 int fact;
2710 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2711 "(%02i.%01i MHz) Offset %i\n",
2712 dcb->target_id, srb->msgin_buf[3] << 2,
2713 (250 / srb->msgin_buf[3]),
2714 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2715 srb->msgin_buf[4]);
2716
2717 if (srb->msgin_buf[4] > 15)
2718 srb->msgin_buf[4] = 15;
2719 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2720 dcb->sync_offset = 0;
2721 else if (dcb->sync_offset == 0)
2722 dcb->sync_offset = srb->msgin_buf[4];
2723 if (srb->msgin_buf[4] > dcb->sync_offset)
2724 srb->msgin_buf[4] = dcb->sync_offset;
2725 else
2726 dcb->sync_offset = srb->msgin_buf[4];
2727 bval = 0;
2728 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2729 || dcb->min_nego_period >
2730 clock_period[bval]))
2731 bval++;
2732 if (srb->msgin_buf[3] < clock_period[bval])
2733 dprintkl(KERN_INFO,
2734 "msgin_set_sync: Increase sync nego period to %ins\n",
2735 clock_period[bval] << 2);
2736 srb->msgin_buf[3] = clock_period[bval];
2737 dcb->sync_period &= 0xf0;
2738 dcb->sync_period |= ALT_SYNC | bval;
2739 dcb->min_nego_period = srb->msgin_buf[3];
2740
2741 if (dcb->sync_period & WIDE_SYNC)
2742 fact = 500;
2743 else
2744 fact = 250;
2745
2746 dprintkl(KERN_INFO,
2747 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2748 dcb->target_id, (fact == 500) ? "Wide16" : "",
2749 dcb->min_nego_period << 2, dcb->sync_offset,
2750 (fact / dcb->min_nego_period),
2751 ((fact % dcb->min_nego_period) * 10 +
2752 dcb->min_nego_period / 2) / dcb->min_nego_period);
2753
2754 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2755 /* Reply with corrected SDTR Message */
2756 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2757 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2758
2759 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2760 srb->msg_count = 5;
2761 DC395x_ENABLE_MSGOUT;
2762 dcb->sync_mode |= SYNC_NEGO_DONE;
2763 } else {
2764 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2765 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2766 build_wdtr(acb, dcb, srb);
2767 DC395x_ENABLE_MSGOUT;
2768 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2769 }
2770 }
2771 srb->state &= ~SRB_DO_SYNC_NEGO;
2772 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2773
2774 reprogram_regs(acb, dcb);
2775 }
2776
2777
2778 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2779 struct ScsiReqBlk *srb)
2780 {
2781 struct DeviceCtlBlk *dcb = srb->dcb;
2782 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2783
2784 dcb->sync_period &= ~WIDE_SYNC;
2785 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2786 dcb->sync_mode |= WIDE_NEGO_DONE;
2787 srb->state &= ~SRB_DO_WIDE_NEGO;
2788 reprogram_regs(acb, dcb);
2789 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2790 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2791 build_sdtr(acb, dcb, srb);
2792 DC395x_ENABLE_MSGOUT;
2793 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2794 }
2795 }
2796
2797 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2798 {
2799 struct DeviceCtlBlk *dcb = srb->dcb;
2800 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2801 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2802 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2803
2804 if (srb->msgin_buf[3] > wide)
2805 srb->msgin_buf[3] = wide;
2806 /* Completed */
2807 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2808 dprintkl(KERN_DEBUG,
2809 "msgin_set_wide: Wide nego initiated <%02i>\n",
2810 dcb->target_id);
2811 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2812 srb->msg_count = 4;
2813 srb->state |= SRB_DO_WIDE_NEGO;
2814 DC395x_ENABLE_MSGOUT;
2815 }
2816
2817 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2818 if (srb->msgin_buf[3] > 0)
2819 dcb->sync_period |= WIDE_SYNC;
2820 else
2821 dcb->sync_period &= ~WIDE_SYNC;
2822 srb->state &= ~SRB_DO_WIDE_NEGO;
2823 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2824 dprintkdbg(DBG_1,
2825 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2826 (8 << srb->msgin_buf[3]), dcb->target_id);
2827 reprogram_regs(acb, dcb);
2828 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2829 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2830 build_sdtr(acb, dcb, srb);
2831 DC395x_ENABLE_MSGOUT;
2832 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2833 }
2834 }
2835
2836
2837 /*
2838 * extended message codes:
2839 *
2840 * code description
2841 *
2842 * 02h Reserved
2843 * 00h MODIFY DATA POINTER
2844 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2845 * 03h WIDE DATA TRANSFER REQUEST
2846 * 04h - 7Fh Reserved
2847 * 80h - FFh Vendor specific
2848 */
2849 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2850 u16 *pscsi_status)
2851 {
2852 struct DeviceCtlBlk *dcb = acb->active_dcb;
2853 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid);
2854
2855 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2856 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2857 /* Now eval the msg */
2858 switch (srb->msgin_buf[0]) {
2859 case DISCONNECT:
2860 srb->state = SRB_DISCONNECT;
2861 break;
2862
2863 case SIMPLE_QUEUE_TAG:
2864 case HEAD_OF_QUEUE_TAG:
2865 case ORDERED_QUEUE_TAG:
2866 srb =
2867 msgin_qtag(acb, dcb,
2868 srb->msgin_buf[1]);
2869 break;
2870
2871 case MESSAGE_REJECT:
2872 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2873 DO_CLRATN | DO_DATALATCH);
2874 /* A sync nego message was rejected ! */
2875 if (srb->state & SRB_DO_SYNC_NEGO) {
2876 msgin_set_async(acb, srb);
2877 break;
2878 }
2879 /* A wide nego message was rejected ! */
2880 if (srb->state & SRB_DO_WIDE_NEGO) {
2881 msgin_set_nowide(acb, srb);
2882 break;
2883 }
2884 enable_msgout_abort(acb, srb);
2885 /*srb->state |= SRB_ABORT_SENT */
2886 break;
2887
2888 case EXTENDED_MESSAGE:
2889 /* SDTR */
2890 if (srb->msgin_buf[1] == 3
2891 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2892 msgin_set_sync(acb, srb);
2893 break;
2894 }
2895 /* WDTR */
2896 if (srb->msgin_buf[1] == 2
2897 && srb->msgin_buf[2] == EXTENDED_WDTR
2898 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2899 msgin_set_wide(acb, srb);
2900 break;
2901 }
2902 msgin_reject(acb, srb);
2903 break;
2904
2905 case MSG_IGNOREWIDE:
2906 /* Discard wide residual */
2907 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2908 break;
2909
2910 case COMMAND_COMPLETE:
2911 /* nothing has to be done */
2912 break;
2913
2914 case SAVE_POINTERS:
2915 /*
2916 * SAVE POINTER may be ignored as we have the struct
2917 * ScsiReqBlk* associated with the scsi command.
2918 */
2919 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2920 "SAVE POINTER rem=%i Ignore\n",
2921 srb->cmd->pid, srb->total_xfer_length);
2922 break;
2923
2924 case RESTORE_POINTERS:
2925 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2926 break;
2927
2928 case ABORT:
2929 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2930 "<%02i-%i> ABORT msg\n",
2931 srb->cmd->pid, dcb->target_id,
2932 dcb->target_lun);
2933 dcb->flag |= ABORT_DEV_;
2934 enable_msgout_abort(acb, srb);
2935 break;
2936
2937 default:
2938 /* reject unknown messages */
2939 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2940 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2941 srb->msg_count = 1;
2942 srb->msgout_buf[0] = dcb->identify_msg;
2943 DC395x_ENABLE_MSGOUT;
2944 srb->state |= SRB_MSGOUT;
2945 /*break; */
2946 }
2947 msgin_reject(acb, srb);
2948 }
2949
2950 /* Clear counter and MsgIn state */
2951 srb->state &= ~SRB_MSGIN;
2952 acb->msg_len = 0;
2953 }
2954 *pscsi_status = PH_BUS_FREE;
2955 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2956 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2957 }
2958
2959
2960 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2961 u16 *pscsi_status)
2962 {
2963 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid);
2964 clear_fifo(acb, "msgin_phase1");
2965 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2966 if (!(srb->state & SRB_MSGIN)) {
2967 srb->state &= ~SRB_DISCONNECT;
2968 srb->state |= SRB_MSGIN;
2969 }
2970 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2971 /* SCSI command */
2972 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2973 }
2974
2975
2976 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2977 u16 *pscsi_status)
2978 {
2979 }
2980
2981
2982 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2983 u16 *pscsi_status)
2984 {
2985 }
2986
2987
2988 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
2989 {
2990 struct DeviceCtlBlk *i;
2991
2992 /* set all lun device's period, offset */
2993 if (dcb->identify_msg & 0x07)
2994 return;
2995
2996 if (acb->scan_devices) {
2997 current_sync_offset = dcb->sync_offset;
2998 return;
2999 }
3000
3001 list_for_each_entry(i, &acb->dcb_list, list)
3002 if (i->target_id == dcb->target_id) {
3003 i->sync_period = dcb->sync_period;
3004 i->sync_offset = dcb->sync_offset;
3005 i->sync_mode = dcb->sync_mode;
3006 i->min_nego_period = dcb->min_nego_period;
3007 }
3008 }
3009
3010
3011 static void disconnect(struct AdapterCtlBlk *acb)
3012 {
3013 struct DeviceCtlBlk *dcb = acb->active_dcb;
3014 struct ScsiReqBlk *srb;
3015
3016 if (!dcb) {
3017 dprintkl(KERN_ERR, "disconnect: No such device\n");
3018 udelay(500);
3019 /* Suspend queue for a while */
3020 acb->scsi_host->last_reset =
3021 jiffies + HZ / 2 +
3022 HZ * acb->eeprom.delay_time;
3023 clear_fifo(acb, "disconnectEx");
3024 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3025 return;
3026 }
3027 srb = dcb->active_srb;
3028 acb->active_dcb = NULL;
3029 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid);
3030
3031 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3032 clear_fifo(acb, "disconnect");
3033 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3034 if (srb->state & SRB_UNEXPECT_RESEL) {
3035 dprintkl(KERN_ERR,
3036 "disconnect: Unexpected reselection <%02i-%i>\n",
3037 dcb->target_id, dcb->target_lun);
3038 srb->state = 0;
3039 waiting_process_next(acb);
3040 } else if (srb->state & SRB_ABORT_SENT) {
3041 dcb->flag &= ~ABORT_DEV_;
3042 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3043 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3044 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3045 waiting_process_next(acb);
3046 } else {
3047 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3048 || !(srb->
3049 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3050 /*
3051 * Selection time out
3052 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3053 */
3054 /* Unexp. Disc / Sel Timeout */
3055 if (srb->state != SRB_START_
3056 && srb->state != SRB_MSGOUT) {
3057 srb->state = SRB_READY;
3058 dprintkl(KERN_DEBUG,
3059 "disconnect: (pid#%li) Unexpected\n",
3060 srb->cmd->pid);
3061 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3062 goto disc1;
3063 } else {
3064 /* Normal selection timeout */
3065 dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
3066 "<%02i-%i> SelTO\n", srb->cmd->pid,
3067 dcb->target_id, dcb->target_lun);
3068 if (srb->retry_count++ > DC395x_MAX_RETRIES
3069 || acb->scan_devices) {
3070 srb->target_status =
3071 SCSI_STAT_SEL_TIMEOUT;
3072 goto disc1;
3073 }
3074 free_tag(dcb, srb);
3075 srb_going_to_waiting_move(dcb, srb);
3076 dprintkdbg(DBG_KG,
3077 "disconnect: (pid#%li) Retry\n",
3078 srb->cmd->pid);
3079 waiting_set_timer(acb, HZ / 20);
3080 }
3081 } else if (srb->state & SRB_DISCONNECT) {
3082 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3083 /*
3084 * SRB_DISCONNECT (This is what we expect!)
3085 */
3086 if (bval & 0x40) {
3087 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3088 " 0x%02x: ACK set! Other controllers?\n",
3089 bval);
3090 /* It could come from another initiator, therefore don't do much ! */
3091 } else
3092 waiting_process_next(acb);
3093 } else if (srb->state & SRB_COMPLETED) {
3094 disc1:
3095 /*
3096 ** SRB_COMPLETED
3097 */
3098 free_tag(dcb, srb);
3099 dcb->active_srb = NULL;
3100 srb->state = SRB_FREE;
3101 srb_done(acb, dcb, srb);
3102 }
3103 }
3104 }
3105
3106
3107 static void reselect(struct AdapterCtlBlk *acb)
3108 {
3109 struct DeviceCtlBlk *dcb = acb->active_dcb;
3110 struct ScsiReqBlk *srb = NULL;
3111 u16 rsel_tar_lun_id;
3112 u8 id, lun;
3113 u8 arblostflag = 0;
3114 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3115
3116 clear_fifo(acb, "reselect");
3117 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3118 /* Read Reselected Target ID and LUN */
3119 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3120 if (dcb) { /* Arbitration lost but Reselection win */
3121 srb = dcb->active_srb;
3122 if (!srb) {
3123 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3124 "but active_srb == NULL\n");
3125 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3126 return;
3127 }
3128 /* Why the if ? */
3129 if (!acb->scan_devices) {
3130 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
3131 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3132 srb->cmd->pid, dcb->target_id,
3133 dcb->target_lun, rsel_tar_lun_id,
3134 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3135 arblostflag = 1;
3136 /*srb->state |= SRB_DISCONNECT; */
3137
3138 srb->state = SRB_READY;
3139 free_tag(dcb, srb);
3140 srb_going_to_waiting_move(dcb, srb);
3141 waiting_set_timer(acb, HZ / 20);
3142
3143 /* return; */
3144 }
3145 }
3146 /* Read Reselected Target Id and LUN */
3147 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3148 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3149 "Got %i!\n", rsel_tar_lun_id);
3150 id = rsel_tar_lun_id & 0xff;
3151 lun = (rsel_tar_lun_id >> 8) & 7;
3152 dcb = find_dcb(acb, id, lun);
3153 if (!dcb) {
3154 dprintkl(KERN_ERR, "reselect: From non existent device "
3155 "<%02i-%i>\n", id, lun);
3156 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3157 return;
3158 }
3159 acb->active_dcb = dcb;
3160
3161 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3162 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3163 "disconnection? <%02i-%i>\n",
3164 dcb->target_id, dcb->target_lun);
3165
3166 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3167 srb = acb->tmp_srb;
3168 dcb->active_srb = srb;
3169 } else {
3170 /* There can be only one! */
3171 srb = dcb->active_srb;
3172 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3173 /*
3174 * abort command
3175 */
3176 dprintkl(KERN_DEBUG,
3177 "reselect: w/o disconnected cmds <%02i-%i>\n",
3178 dcb->target_id, dcb->target_lun);
3179 srb = acb->tmp_srb;
3180 srb->state = SRB_UNEXPECT_RESEL;
3181 dcb->active_srb = srb;
3182 enable_msgout_abort(acb, srb);
3183 } else {
3184 if (dcb->flag & ABORT_DEV_) {
3185 /*srb->state = SRB_ABORT_SENT; */
3186 enable_msgout_abort(acb, srb);
3187 } else
3188 srb->state = SRB_DATA_XFER;
3189
3190 }
3191 }
3192 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3193
3194 /* Program HA ID, target ID, period and offset */
3195 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3196 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3197 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3198 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3199 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3200 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3201 /* SCSI command */
3202 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3203 }
3204
3205
3206 static inline u8 tagq_blacklist(char *name)
3207 {
3208 #ifndef DC395x_NO_TAGQ
3209 #if 0
3210 u8 i;
3211 for (i = 0; i < BADDEVCNT; i++)
3212 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3213 return 1;
3214 #endif
3215 return 0;
3216 #else
3217 return 1;
3218 #endif
3219 }
3220
3221
3222 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3223 {
3224 /* Check for SCSI format (ANSI and Response data format) */
3225 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3226 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3227 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3228 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3229 /* ((dcb->dev_type == TYPE_DISK)
3230 || (dcb->dev_type == TYPE_MOD)) && */
3231 !tagq_blacklist(((char *)ptr) + 8)) {
3232 if (dcb->max_command == 1)
3233 dcb->max_command =
3234 dcb->acb->tag_max_num;
3235 dcb->sync_mode |= EN_TAG_QUEUEING;
3236 /*dcb->tag_mask = 0; */
3237 } else
3238 dcb->max_command = 1;
3239 }
3240 }
3241
3242
3243 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3244 struct ScsiInqData *ptr)
3245 {
3246 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3247 dcb->dev_type = bval1;
3248 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3249 disc_tagq_set(dcb, ptr);
3250 }
3251
3252
3253 /* unmap mapped pci regions from SRB */
3254 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3255 {
3256 struct scsi_cmnd *cmd = srb->cmd;
3257 enum dma_data_direction dir = cmd->sc_data_direction;
3258 if (cmd->use_sg && dir != PCI_DMA_NONE) {
3259 /* unmap DC395x SG list */
3260 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3261 srb->sg_bus_addr, SEGMENTX_LEN);
3262 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3263 SEGMENTX_LEN,
3264 PCI_DMA_TODEVICE);
3265 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3266 cmd->use_sg, cmd->request_buffer);
3267 /* unmap the sg segments */
3268 pci_unmap_sg(acb->dev,
3269 (struct scatterlist *)cmd->request_buffer,
3270 cmd->use_sg, dir);
3271 } else if (cmd->request_buffer && dir != PCI_DMA_NONE) {
3272 dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n",
3273 srb->segment_x[0].address, cmd->request_bufflen);
3274 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3275 cmd->request_bufflen, dir);
3276 }
3277 }
3278
3279
3280 /* unmap mapped pci sense buffer from SRB */
3281 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3282 struct ScsiReqBlk *srb)
3283 {
3284 if (!(srb->flag & AUTO_REQSENSE))
3285 return;
3286 /* Unmap sense buffer */
3287 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3288 srb->segment_x[0].address);
3289 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3290 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3291 /* Restore SG stuff */
3292 srb->total_xfer_length = srb->xferred;
3293 srb->segment_x[0].address =
3294 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3295 srb->segment_x[0].length =
3296 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3297 }
3298
3299
3300 /*
3301 * Complete execution of a SCSI command
3302 * Signal completion to the generic SCSI driver
3303 */
3304 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3305 struct ScsiReqBlk *srb)
3306 {
3307 u8 tempcnt, status;
3308 struct scsi_cmnd *cmd = srb->cmd;
3309 struct ScsiInqData *ptr;
3310 enum dma_data_direction dir = cmd->sc_data_direction;
3311
3312 if (cmd->use_sg) {
3313 struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer;
3314 ptr = (struct ScsiInqData *)(page_address(sg->page) + sg->offset);
3315 } else {
3316 ptr = (struct ScsiInqData *)(cmd->request_buffer);
3317 }
3318
3319 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid,
3320 srb->cmd->device->id, srb->cmd->device->lun);
3321 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p addr=%p\n",
3322 srb, cmd->use_sg, srb->sg_index, srb->sg_count,
3323 cmd->request_buffer, ptr);
3324 status = srb->target_status;
3325 if (srb->flag & AUTO_REQSENSE) {
3326 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3327 pci_unmap_srb_sense(acb, srb);
3328 /*
3329 ** target status..........................
3330 */
3331 srb->flag &= ~AUTO_REQSENSE;
3332 srb->adapter_status = 0;
3333 srb->target_status = CHECK_CONDITION << 1;
3334 if (debug_enabled(DBG_1)) {
3335 switch (cmd->sense_buffer[2] & 0x0f) {
3336 case NOT_READY:
3337 dprintkl(KERN_DEBUG,
3338 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3339 cmd->cmnd[0], dcb->target_id,
3340 dcb->target_lun, status, acb->scan_devices);
3341 break;
3342 case UNIT_ATTENTION:
3343 dprintkl(KERN_DEBUG,
3344 "ReqSense: UNIT_ATTENTION 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 ILLEGAL_REQUEST:
3349 dprintkl(KERN_DEBUG,
3350 "ReqSense: ILLEGAL_REQUEST 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 MEDIUM_ERROR:
3355 dprintkl(KERN_DEBUG,
3356 "ReqSense: MEDIUM_ERROR 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 HARDWARE_ERROR:
3361 dprintkl(KERN_DEBUG,
3362 "ReqSense: HARDWARE_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 }
3367 if (cmd->sense_buffer[7] >= 6)
3368 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3369 "(0x%08x 0x%08x)\n",
3370 cmd->sense_buffer[2], cmd->sense_buffer[12],
3371 cmd->sense_buffer[13],
3372 *((unsigned int *)(cmd->sense_buffer + 3)),
3373 *((unsigned int *)(cmd->sense_buffer + 8)));
3374 else
3375 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3376 cmd->sense_buffer[2],
3377 *((unsigned int *)(cmd->sense_buffer + 3)));
3378 }
3379
3380 if (status == (CHECK_CONDITION << 1)) {
3381 cmd->result = DID_BAD_TARGET << 16;
3382 goto ckc_e;
3383 }
3384 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3385
3386 if (srb->total_xfer_length
3387 && srb->total_xfer_length >= cmd->underflow)
3388 cmd->result =
3389 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3390 srb->end_message, CHECK_CONDITION);
3391 /*SET_RES_DID(cmd->result,DID_OK) */
3392 else
3393 cmd->result =
3394 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3395 srb->end_message, CHECK_CONDITION);
3396
3397 goto ckc_e;
3398 }
3399
3400 /*************************************************************/
3401 if (status) {
3402 /*
3403 * target status..........................
3404 */
3405 if (status_byte(status) == CHECK_CONDITION) {
3406 request_sense(acb, dcb, srb);
3407 return;
3408 } else if (status_byte(status) == QUEUE_FULL) {
3409 tempcnt = (u8)list_size(&dcb->srb_going_list);
3410 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3411 dcb->target_id, dcb->target_lun, tempcnt);
3412 if (tempcnt > 1)
3413 tempcnt--;
3414 dcb->max_command = tempcnt;
3415 free_tag(dcb, srb);
3416 srb_going_to_waiting_move(dcb, srb);
3417 waiting_set_timer(acb, HZ / 20);
3418 srb->adapter_status = 0;
3419 srb->target_status = 0;
3420 return;
3421 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3422 srb->adapter_status = H_SEL_TIMEOUT;
3423 srb->target_status = 0;
3424 cmd->result = DID_NO_CONNECT << 16;
3425 } else {
3426 srb->adapter_status = 0;
3427 SET_RES_DID(cmd->result, DID_ERROR);
3428 SET_RES_MSG(cmd->result, srb->end_message);
3429 SET_RES_TARGET(cmd->result, status);
3430
3431 }
3432 } else {
3433 /*
3434 ** process initiator status..........................
3435 */
3436 status = srb->adapter_status;
3437 if (status & H_OVER_UNDER_RUN) {
3438 srb->target_status = 0;
3439 SET_RES_DID(cmd->result, DID_OK);
3440 SET_RES_MSG(cmd->result, srb->end_message);
3441 } else if (srb->status & PARITY_ERROR) {
3442 SET_RES_DID(cmd->result, DID_PARITY);
3443 SET_RES_MSG(cmd->result, srb->end_message);
3444 } else { /* No error */
3445
3446 srb->adapter_status = 0;
3447 srb->target_status = 0;
3448 SET_RES_DID(cmd->result, DID_OK);
3449 }
3450 }
3451
3452 if (dir != PCI_DMA_NONE) {
3453 if (cmd->use_sg)
3454 pci_dma_sync_sg_for_cpu(acb->dev,
3455 (struct scatterlist *)cmd->
3456 request_buffer, cmd->use_sg, dir);
3457 else if (cmd->request_buffer)
3458 pci_dma_sync_single_for_cpu(acb->dev,
3459 srb->segment_x[0].address,
3460 cmd->request_bufflen, dir);
3461 }
3462
3463 if ((cmd->result & RES_DID) == 0 && cmd->cmnd[0] == INQUIRY
3464 && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8
3465 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3466 dcb->inquiry7 = ptr->Flags;
3467 /* Check Error Conditions */
3468 ckc_e:
3469
3470 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3471 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3472 if (cmd->cmnd[0] == INQUIRY && (cmd->result == (DID_OK << 16)
3473 || status_byte(cmd->
3474 result) &
3475 CHECK_CONDITION)) {
3476
3477 if (!dcb->init_tcq_flag) {
3478 add_dev(acb, dcb, ptr);
3479 dcb->init_tcq_flag = 1;
3480 }
3481
3482 }
3483
3484
3485 /* Here is the info for Doug Gilbert's sg3 ... */
3486 cmd->resid = srb->total_xfer_length;
3487 /* This may be interpreted by sb. or not ... */
3488 cmd->SCp.this_residual = srb->total_xfer_length;
3489 cmd->SCp.buffers_residual = 0;
3490 if (debug_enabled(DBG_KG)) {
3491 if (srb->total_xfer_length)
3492 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
3493 "cmnd=0x%02x Missed %i bytes\n",
3494 cmd->pid, cmd->device->id, cmd->device->lun,
3495 cmd->cmnd[0], srb->total_xfer_length);
3496 }
3497
3498 srb_going_remove(dcb, srb);
3499 /* Add to free list */
3500 if (srb == acb->tmp_srb)
3501 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3502 else {
3503 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
3504 cmd->pid, cmd->result);
3505 srb_free_insert(acb, srb);
3506 }
3507 pci_unmap_srb(acb, srb);
3508
3509 cmd->scsi_done(cmd);
3510 waiting_process_next(acb);
3511 }
3512
3513
3514 /* abort all cmds in our queues */
3515 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3516 struct scsi_cmnd *cmd, u8 force)
3517 {
3518 struct DeviceCtlBlk *dcb;
3519 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3520
3521 list_for_each_entry(dcb, &acb->dcb_list, list) {
3522 struct ScsiReqBlk *srb;
3523 struct ScsiReqBlk *tmp;
3524 struct scsi_cmnd *p;
3525
3526 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3527 enum dma_data_direction dir;
3528 int result;
3529
3530 p = srb->cmd;
3531 dir = p->sc_data_direction;
3532 result = MK_RES(0, did_flag, 0, 0);
3533 printk("G:%li(%02i-%i) ", p->pid,
3534 p->device->id, p->device->lun);
3535 srb_going_remove(dcb, srb);
3536 free_tag(dcb, srb);
3537 srb_free_insert(acb, srb);
3538 p->result = result;
3539 pci_unmap_srb_sense(acb, srb);
3540 pci_unmap_srb(acb, srb);
3541 if (force) {
3542 /* For new EH, we normally don't need to give commands back,
3543 * as they all complete or all time out */
3544 p->scsi_done(p);
3545 }
3546 }
3547 if (!list_empty(&dcb->srb_going_list))
3548 dprintkl(KERN_DEBUG,
3549 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3550 dcb->target_id, dcb->target_lun);
3551 if (dcb->tag_mask)
3552 dprintkl(KERN_DEBUG,
3553 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3554 dcb->target_id, dcb->target_lun,
3555 dcb->tag_mask);
3556
3557 /* Waiting queue */
3558 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3559 int result;
3560 p = srb->cmd;
3561
3562 result = MK_RES(0, did_flag, 0, 0);
3563 printk("W:%li<%02i-%i>", p->pid, p->device->id,
3564 p->device->lun);
3565 srb_waiting_remove(dcb, srb);
3566 srb_free_insert(acb, srb);
3567 p->result = result;
3568 pci_unmap_srb_sense(acb, srb);
3569 pci_unmap_srb(acb, srb);
3570 if (force) {
3571 /* For new EH, we normally don't need to give commands back,
3572 * as they all complete or all time out */
3573 cmd->scsi_done(cmd);
3574 }
3575 }
3576 if (!list_empty(&dcb->srb_waiting_list))
3577 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3578 list_size(&dcb->srb_waiting_list), dcb->target_id,
3579 dcb->target_lun);
3580 dcb->flag &= ~ABORT_DEV_;
3581 }
3582 printk("\n");
3583 }
3584
3585
3586 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3587 {
3588 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3589 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3590 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3591
3592 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3593 /* nothing */;
3594 }
3595
3596
3597 static void set_basic_config(struct AdapterCtlBlk *acb)
3598 {
3599 u8 bval;
3600 u16 wval;
3601 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3602 if (acb->config & HCC_PARITY)
3603 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3604 else
3605 bval = PHASELATCH | INITIATOR | BLOCKRST;
3606
3607 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3608
3609 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3610 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3611 /* program Host ID */
3612 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3613 /* set ansynchronous transfer */
3614 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3615 /* Turn LED control off */
3616 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3617 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3618 /* DMA config */
3619 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3620 wval |=
3621 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3622 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3623 /* Clear pending interrupt status */
3624 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3625 /* Enable SCSI interrupt */
3626 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3627 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3628 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3629 );
3630 }
3631
3632
3633 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3634 {
3635 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3636 /* delay half a second */
3637 if (timer_pending(&acb->waiting_timer))
3638 del_timer(&acb->waiting_timer);
3639
3640 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3641 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3642 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3643 udelay(500);
3644 /* Maybe we locked up the bus? Then lets wait even longer ... */
3645 acb->scsi_host->last_reset =
3646 jiffies + 5 * HZ / 2 +
3647 HZ * acb->eeprom.delay_time;
3648
3649 clear_fifo(acb, "scsi_reset_detect");
3650 set_basic_config(acb);
3651 /*1.25 */
3652 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3653
3654 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3655 acb->acb_flag |= RESET_DONE;
3656 } else {
3657 acb->acb_flag |= RESET_DETECT;
3658 reset_dev_param(acb);
3659 doing_srb_done(acb, DID_RESET, NULL, 1);
3660 /*DC395x_RecoverSRB( acb ); */
3661 acb->active_dcb = NULL;
3662 acb->acb_flag = 0;
3663 waiting_process_next(acb);
3664 }
3665 }
3666
3667
3668 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3669 struct ScsiReqBlk *srb)
3670 {
3671 struct scsi_cmnd *cmd = srb->cmd;
3672 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
3673 cmd->pid, cmd->device->id, cmd->device->lun);
3674
3675 srb->flag |= AUTO_REQSENSE;
3676 srb->adapter_status = 0;
3677 srb->target_status = 0;
3678
3679 /* KG: Can this prevent crap sense data ? */
3680 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
3681
3682 /* Save some data */
3683 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3684 srb->segment_x[0].address;
3685 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3686 srb->segment_x[0].length;
3687 srb->xferred = srb->total_xfer_length;
3688 /* srb->segment_x : a one entry of S/G list table */
3689 srb->total_xfer_length = sizeof(cmd->sense_buffer);
3690 srb->segment_x[0].length = sizeof(cmd->sense_buffer);
3691 /* Map sense buffer */
3692 srb->segment_x[0].address =
3693 pci_map_single(acb->dev, cmd->sense_buffer,
3694 sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE);
3695 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3696 cmd->sense_buffer, srb->segment_x[0].address,
3697 sizeof(cmd->sense_buffer));
3698 srb->sg_count = 1;
3699 srb->sg_index = 0;
3700
3701 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3702 dprintkl(KERN_DEBUG,
3703 "request_sense: (pid#%li) failed <%02i-%i>\n",
3704 srb->cmd->pid, dcb->target_id, dcb->target_lun);
3705 srb_going_to_waiting_move(dcb, srb);
3706 waiting_set_timer(acb, HZ / 100);
3707 }
3708 }
3709
3710
3711 /**
3712 * device_alloc - Allocate a new device instance. This create the
3713 * devices instance and sets up all the data items. The adapter
3714 * instance is required to obtain confiuration information for this
3715 * device. This does *not* add this device to the adapters device
3716 * list.
3717 *
3718 * @acb: The adapter to obtain configuration information from.
3719 * @target: The target for the new device.
3720 * @lun: The lun for the new device.
3721 *
3722 * Return the new device if succesfull or NULL on failure.
3723 **/
3724 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3725 u8 target, u8 lun)
3726 {
3727 struct NvRamType *eeprom = &acb->eeprom;
3728 u8 period_index = eeprom->target[target].period & 0x07;
3729 struct DeviceCtlBlk *dcb;
3730
3731 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3732 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3733 if (!dcb)
3734 return NULL;
3735 dcb->acb = NULL;
3736 INIT_LIST_HEAD(&dcb->srb_going_list);
3737 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3738 dcb->active_srb = NULL;
3739 dcb->tag_mask = 0;
3740 dcb->max_command = 1;
3741 dcb->target_id = target;
3742 dcb->target_lun = lun;
3743 #ifndef DC395x_NO_DISCONNECT
3744 dcb->identify_msg =
3745 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3746 #else
3747 dcb->identify_msg = IDENTIFY(0, lun);
3748 #endif
3749 dcb->dev_mode = eeprom->target[target].cfg0;
3750 dcb->inquiry7 = 0;
3751 dcb->sync_mode = 0;
3752 dcb->min_nego_period = clock_period[period_index];
3753 dcb->sync_period = 0;
3754 dcb->sync_offset = 0;
3755 dcb->flag = 0;
3756
3757 #ifndef DC395x_NO_WIDE
3758 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3759 && (acb->config & HCC_WIDE_CARD))
3760 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3761 #endif
3762 #ifndef DC395x_NO_SYNC
3763 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3764 if (!(lun) || current_sync_offset)
3765 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3766 #endif
3767 if (dcb->target_lun != 0) {
3768 /* Copy settings */
3769 struct DeviceCtlBlk *p;
3770 list_for_each_entry(p, &acb->dcb_list, list)
3771 if (p->target_id == dcb->target_id)
3772 break;
3773 dprintkdbg(DBG_1,
3774 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3775 dcb->target_id, dcb->target_lun,
3776 p->target_id, p->target_lun);
3777 dcb->sync_mode = p->sync_mode;
3778 dcb->sync_period = p->sync_period;
3779 dcb->min_nego_period = p->min_nego_period;
3780 dcb->sync_offset = p->sync_offset;
3781 dcb->inquiry7 = p->inquiry7;
3782 }
3783 return dcb;
3784 }
3785
3786
3787 /**
3788 * adapter_add_device - Adds the device instance to the adaptor instance.
3789 *
3790 * @acb: The adapter device to be updated
3791 * @dcb: A newly created and intialised device instance to add.
3792 **/
3793 static void adapter_add_device(struct AdapterCtlBlk *acb,
3794 struct DeviceCtlBlk *dcb)
3795 {
3796 /* backpointer to adapter */
3797 dcb->acb = acb;
3798
3799 /* set run_robin to this device if it is currently empty */
3800 if (list_empty(&acb->dcb_list))
3801 acb->dcb_run_robin = dcb;
3802
3803 /* add device to list */
3804 list_add_tail(&dcb->list, &acb->dcb_list);
3805
3806 /* update device maps */
3807 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3808 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3809 }
3810
3811
3812 /**
3813 * adapter_remove_device - Removes the device instance from the adaptor
3814 * instance. The device instance is not check in any way or freed by this.
3815 * The caller is expected to take care of that. This will simply remove the
3816 * device from the adapters data strcutures.
3817 *
3818 * @acb: The adapter device to be updated
3819 * @dcb: A device that has previously been added to the adapter.
3820 **/
3821 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3822 struct DeviceCtlBlk *dcb)
3823 {
3824 struct DeviceCtlBlk *i;
3825 struct DeviceCtlBlk *tmp;
3826 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3827 dcb->target_id, dcb->target_lun);
3828
3829 /* fix up any pointers to this device that we have in the adapter */
3830 if (acb->active_dcb == dcb)
3831 acb->active_dcb = NULL;
3832 if (acb->dcb_run_robin == dcb)
3833 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3834
3835 /* unlink from list */
3836 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3837 if (dcb == i) {
3838 list_del(&i->list);
3839 break;
3840 }
3841
3842 /* clear map and children */
3843 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3844 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3845 dcb->acb = NULL;
3846 }
3847
3848
3849 /**
3850 * adapter_remove_and_free_device - Removes a single device from the adapter
3851 * and then frees the device information.
3852 *
3853 * @acb: The adapter device to be updated
3854 * @dcb: A device that has previously been added to the adapter.
3855 */
3856 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3857 struct DeviceCtlBlk *dcb)
3858 {
3859 if (list_size(&dcb->srb_going_list) > 1) {
3860 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3861 "Won't remove because of %i active requests.\n",
3862 dcb->target_id, dcb->target_lun,
3863 list_size(&dcb->srb_going_list));
3864 return;
3865 }
3866 adapter_remove_device(acb, dcb);
3867 kfree(dcb);
3868 }
3869
3870
3871 /**
3872 * adapter_remove_and_free_all_devices - Removes and frees all of the
3873 * devices associated with the specified adapter.
3874 *
3875 * @acb: The adapter from which all devices should be removed.
3876 **/
3877 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3878 {
3879 struct DeviceCtlBlk *dcb;
3880 struct DeviceCtlBlk *tmp;
3881 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3882 list_size(&acb->dcb_list));
3883
3884 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3885 adapter_remove_and_free_device(acb, dcb);
3886 }
3887
3888
3889 /**
3890 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3891 * scsi device that we need to deal with. We allocate a new device and then
3892 * insert that device into the adapters device list.
3893 *
3894 * @scsi_device: The new scsi device that we need to handle.
3895 **/
3896 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3897 {
3898 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3899 struct DeviceCtlBlk *dcb;
3900
3901 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3902 if (!dcb)
3903 return -ENOMEM;
3904 adapter_add_device(acb, dcb);
3905
3906 return 0;
3907 }
3908
3909
3910 /**
3911 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3912 * device that is going away.
3913 *
3914 * @scsi_device: The new scsi device that we need to handle.
3915 **/
3916 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3917 {
3918 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3919 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3920 if (dcb)
3921 adapter_remove_and_free_device(acb, dcb);
3922 }
3923
3924
3925
3926
3927 /**
3928 * trms1040_wait_30us: wait for 30 us
3929 *
3930 * Waits for 30us (using the chip by the looks of it..)
3931 *
3932 * @io_port: base I/O address
3933 **/
3934 static void __init trms1040_wait_30us(u16 io_port)
3935 {
3936 /* ScsiPortStallExecution(30); wait 30 us */
3937 outb(5, io_port + TRM_S1040_GEN_TIMER);
3938 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3939 /* nothing */ ;
3940 }
3941
3942
3943 /**
3944 * trms1040_write_cmd - write the secified command and address to
3945 * chip
3946 *
3947 * @io_port: base I/O address
3948 * @cmd: SB + op code (command) to send
3949 * @addr: address to send
3950 **/
3951 static void __init trms1040_write_cmd(u16 io_port, u8 cmd, u8 addr)
3952 {
3953 int i;
3954 u8 send_data;
3955
3956 /* program SB + OP code */
3957 for (i = 0; i < 3; i++, cmd <<= 1) {
3958 send_data = NVR_SELECT;
3959 if (cmd & 0x04) /* Start from bit 2 */
3960 send_data |= NVR_BITOUT;
3961
3962 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3963 trms1040_wait_30us(io_port);
3964 outb((send_data | NVR_CLOCK),
3965 io_port + TRM_S1040_GEN_NVRAM);
3966 trms1040_wait_30us(io_port);
3967 }
3968
3969 /* send address */
3970 for (i = 0; i < 7; i++, addr <<= 1) {
3971 send_data = NVR_SELECT;
3972 if (addr & 0x40) /* Start from bit 6 */
3973 send_data |= NVR_BITOUT;
3974
3975 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3976 trms1040_wait_30us(io_port);
3977 outb((send_data | NVR_CLOCK),
3978 io_port + TRM_S1040_GEN_NVRAM);
3979 trms1040_wait_30us(io_port);
3980 }
3981 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3982 trms1040_wait_30us(io_port);
3983 }
3984
3985
3986 /**
3987 * trms1040_set_data - store a single byte in the eeprom
3988 *
3989 * Called from write all to write a single byte into the SSEEPROM
3990 * Which is done one bit at a time.
3991 *
3992 * @io_port: base I/O address
3993 * @addr: offset into EEPROM
3994 * @byte: bytes to write
3995 **/
3996 static void __init trms1040_set_data(u16 io_port, u8 addr, u8 byte)
3997 {
3998 int i;
3999 u8 send_data;
4000
4001 /* Send write command & address */
4002 trms1040_write_cmd(io_port, 0x05, addr);
4003
4004 /* Write data */
4005 for (i = 0; i < 8; i++, byte <<= 1) {
4006 send_data = NVR_SELECT;
4007 if (byte & 0x80) /* Start from bit 7 */
4008 send_data |= NVR_BITOUT;
4009
4010 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4011 trms1040_wait_30us(io_port);
4012 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4013 trms1040_wait_30us(io_port);
4014 }
4015 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4016 trms1040_wait_30us(io_port);
4017
4018 /* Disable chip select */
4019 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4020 trms1040_wait_30us(io_port);
4021
4022 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4023 trms1040_wait_30us(io_port);
4024
4025 /* Wait for write ready */
4026 while (1) {
4027 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4028 trms1040_wait_30us(io_port);
4029
4030 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4031 trms1040_wait_30us(io_port);
4032
4033 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4034 break;
4035 }
4036
4037 /* Disable chip select */
4038 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4039 }
4040
4041
4042 /**
4043 * trms1040_write_all - write 128 bytes to the eeprom
4044 *
4045 * Write the supplied 128 bytes to the chips SEEPROM
4046 *
4047 * @eeprom: the data to write
4048 * @io_port: the base io port
4049 **/
4050 static void __init trms1040_write_all(struct NvRamType *eeprom, u16 io_port)
4051 {
4052 u8 *b_eeprom = (u8 *)eeprom;
4053 u8 addr;
4054
4055 /* Enable SEEPROM */
4056 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4057 io_port + TRM_S1040_GEN_CONTROL);
4058
4059 /* write enable */
4060 trms1040_write_cmd(io_port, 0x04, 0xFF);
4061 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4062 trms1040_wait_30us(io_port);
4063
4064 /* write */
4065 for (addr = 0; addr < 128; addr++, b_eeprom++)
4066 trms1040_set_data(io_port, addr, *b_eeprom);
4067
4068 /* write disable */
4069 trms1040_write_cmd(io_port, 0x04, 0x00);
4070 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4071 trms1040_wait_30us(io_port);
4072
4073 /* Disable SEEPROM */
4074 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4075 io_port + TRM_S1040_GEN_CONTROL);
4076 }
4077
4078
4079 /**
4080 * trms1040_get_data - get a single byte from the eeprom
4081 *
4082 * Called from read all to read a single byte into the SSEEPROM
4083 * Which is done one bit at a time.
4084 *
4085 * @io_port: base I/O address
4086 * @addr: offset into SEEPROM
4087 *
4088 * Returns the the byte read.
4089 **/
4090 static u8 __init trms1040_get_data(u16 io_port, u8 addr)
4091 {
4092 int i;
4093 u8 read_byte;
4094 u8 result = 0;
4095
4096 /* Send read command & address */
4097 trms1040_write_cmd(io_port, 0x06, addr);
4098
4099 /* read data */
4100 for (i = 0; i < 8; i++) {
4101 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4102 trms1040_wait_30us(io_port);
4103 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4104
4105 /* Get data bit while falling edge */
4106 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4107 result <<= 1;
4108 if (read_byte & NVR_BITIN)
4109 result |= 1;
4110
4111 trms1040_wait_30us(io_port);
4112 }
4113
4114 /* Disable chip select */
4115 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4116 return result;
4117 }
4118
4119
4120 /**
4121 * trms1040_read_all - read all bytes from the eeprom
4122 *
4123 * Read the 128 bytes from the SEEPROM.
4124 *
4125 * @eeprom: where to store the data
4126 * @io_port: the base io port
4127 **/
4128 static void __init trms1040_read_all(struct NvRamType *eeprom, u16 io_port)
4129 {
4130 u8 *b_eeprom = (u8 *)eeprom;
4131 u8 addr;
4132
4133 /* Enable SEEPROM */
4134 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4135 io_port + TRM_S1040_GEN_CONTROL);
4136
4137 /* read details */
4138 for (addr = 0; addr < 128; addr++, b_eeprom++)
4139 *b_eeprom = trms1040_get_data(io_port, addr);
4140
4141 /* Disable SEEPROM */
4142 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4143 io_port + TRM_S1040_GEN_CONTROL);
4144 }
4145
4146
4147
4148 /**
4149 * check_eeprom - get and check contents of the eeprom
4150 *
4151 * Read seeprom 128 bytes into the memory provider in eeprom.
4152 * Checks the checksum and if it's not correct it uses a set of default
4153 * values.
4154 *
4155 * @eeprom: caller allocated strcuture to read the eeprom data into
4156 * @io_port: io port to read from
4157 **/
4158 static void __init check_eeprom(struct NvRamType *eeprom, u16 io_port)
4159 {
4160 u16 *w_eeprom = (u16 *)eeprom;
4161 u16 w_addr;
4162 u16 cksum;
4163 u32 d_addr;
4164 u32 *d_eeprom;
4165
4166 trms1040_read_all(eeprom, io_port); /* read eeprom */
4167
4168 cksum = 0;
4169 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4170 w_addr++, w_eeprom++)
4171 cksum += *w_eeprom;
4172 if (cksum != 0x1234) {
4173 /*
4174 * Checksum is wrong.
4175 * Load a set of defaults into the eeprom buffer
4176 */
4177 dprintkl(KERN_WARNING,
4178 "EEProm checksum error: using default values and options.\n");
4179 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4180 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4181 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4182 eeprom->sub_sys_id[1] =
4183 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4184 eeprom->sub_class = 0x00;
4185 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4186 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4187 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4188 eeprom->device_id[1] =
4189 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4190 eeprom->reserved = 0x00;
4191
4192 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4193 d_addr < 16; d_addr++, d_eeprom++)
4194 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4195
4196 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4197 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4198 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4199 *d_eeprom = 0x00;
4200
4201 /* Now load defaults (maybe set by boot/module params) */
4202 set_safe_settings();
4203 fix_settings();
4204 eeprom_override(eeprom);
4205
4206 eeprom->cksum = 0x00;
4207 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4208 w_addr < 63; w_addr++, w_eeprom++)
4209 cksum += *w_eeprom;
4210
4211 *w_eeprom = 0x1234 - cksum;
4212 trms1040_write_all(eeprom, io_port);
4213 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4214 } else {
4215 set_safe_settings();
4216 eeprom_index_to_delay(eeprom);
4217 eeprom_override(eeprom);
4218 }
4219 }
4220
4221
4222 /**
4223 * print_eeprom_settings - output the eeprom settings
4224 * to the kernel log so people can see what they were.
4225 *
4226 * @eeprom: The eeprom data strucutre to show details for.
4227 **/
4228 static void __init print_eeprom_settings(struct NvRamType *eeprom)
4229 {
4230 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4231 eeprom->scsi_id,
4232 eeprom->target[0].period,
4233 clock_speed[eeprom->target[0].period] / 10,
4234 clock_speed[eeprom->target[0].period] % 10,
4235 eeprom->target[0].cfg0);
4236 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4237 eeprom->channel_cfg, eeprom->max_tag,
4238 1 << eeprom->max_tag, eeprom->delay_time);
4239 }
4240
4241
4242 /* Free SG tables */
4243 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4244 {
4245 int i;
4246 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4247
4248 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4249 if (acb->srb_array[i].segment_x)
4250 kfree(acb->srb_array[i].segment_x);
4251 }
4252
4253
4254 /*
4255 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4256 * should never cross a page boundary */
4257 static int __init adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4258 {
4259 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4260 *SEGMENTX_LEN;
4261 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4262 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4263 int srb_idx = 0;
4264 unsigned i = 0;
4265 struct SGentry *ptr;
4266
4267 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4268 acb->srb_array[i].segment_x = NULL;
4269
4270 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4271 while (pages--) {
4272 ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL);
4273 if (!ptr) {
4274 adapter_sg_tables_free(acb);
4275 return 1;
4276 }
4277 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4278 PAGE_SIZE, ptr, srb_idx);
4279 i = 0;
4280 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4281 acb->srb_array[srb_idx++].segment_x =
4282 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4283 }
4284 if (i < srbs_per_page)
4285 acb->srb.segment_x =
4286 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4287 else
4288 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4289 return 0;
4290 }
4291
4292
4293
4294 /**
4295 * adapter_print_config - print adapter connection and termination
4296 * config
4297 *
4298 * The io port in the adapter needs to have been set before calling
4299 * this function.
4300 *
4301 * @acb: The adapter to print the information for.
4302 **/
4303 static void __init adapter_print_config(struct AdapterCtlBlk *acb)
4304 {
4305 u8 bval;
4306
4307 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4308 dprintkl(KERN_INFO, "%sConnectors: ",
4309 ((bval & WIDESCSI) ? "(Wide) " : ""));
4310 if (!(bval & CON5068))
4311 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4312 if (!(bval & CON68))
4313 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4314 if (!(bval & CON50))
4315 printk("int50 ");
4316 if ((bval & (CON5068 | CON50 | CON68)) ==
4317 0 /*(CON5068 | CON50 | CON68) */ )
4318 printk(" Oops! (All 3?) ");
4319 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4320 printk(" Termination: ");
4321 if (bval & DIS_TERM)
4322 printk("Disabled\n");
4323 else {
4324 if (bval & AUTOTERM)
4325 printk("Auto ");
4326 if (bval & LOW8TERM)
4327 printk("Low ");
4328 if (bval & UP8TERM)
4329 printk("High ");
4330 printk("\n");
4331 }
4332 }
4333
4334
4335 /**
4336 * adapter_init_params - Initialize the various parameters in the
4337 * adapter structure. Note that the pointer to the scsi_host is set
4338 * early (when this instance is created) and the io_port and irq
4339 * values are set later after they have been reserved. This just gets
4340 * everything set to a good starting position.
4341 *
4342 * The eeprom structure in the adapter needs to have been set before
4343 * calling this function.
4344 *
4345 * @acb: The adapter to initialize.
4346 **/
4347 static void __init adapter_init_params(struct AdapterCtlBlk *acb)
4348 {
4349 struct NvRamType *eeprom = &acb->eeprom;
4350 int i;
4351
4352 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4353 /* NOTE: acb->io_port_base is set at port registration time */
4354 /* NOTE: acb->io_port_len is set at port registration time */
4355
4356 INIT_LIST_HEAD(&acb->dcb_list);
4357 acb->dcb_run_robin = NULL;
4358 acb->active_dcb = NULL;
4359
4360 INIT_LIST_HEAD(&acb->srb_free_list);
4361 /* temp SRB for Q tag used or abort command used */
4362 acb->tmp_srb = &acb->srb;
4363 init_timer(&acb->waiting_timer);
4364 init_timer(&acb->selto_timer);
4365
4366 acb->srb_count = DC395x_MAX_SRB_CNT;
4367
4368 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4369 /* NOTE: acb->irq_level is set at IRQ registration time */
4370
4371 acb->tag_max_num = 1 << eeprom->max_tag;
4372 if (acb->tag_max_num > 30)
4373 acb->tag_max_num = 30;
4374
4375 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4376 acb->gmode2 = eeprom->channel_cfg;
4377 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4378
4379 if (eeprom->channel_cfg & NAC_SCANLUN)
4380 acb->lun_chk = 1;
4381 acb->scan_devices = 1;
4382
4383 acb->scsi_host->this_id = eeprom->scsi_id;
4384 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4385
4386 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4387 acb->dcb_map[i] = 0;
4388
4389 acb->msg_len = 0;
4390
4391 /* link static array of srbs into the srb free list */
4392 for (i = 0; i < acb->srb_count - 1; i++)
4393 srb_free_insert(acb, &acb->srb_array[i]);
4394 }
4395
4396
4397 /**
4398 * adapter_init_host - Initialize the scsi host instance based on
4399 * values that we have already stored in the adapter instance. There's
4400 * some mention that a lot of these are deprecated, so we won't use
4401 * them (we'll use the ones in the adapter instance) but we'll fill
4402 * them in in case something else needs them.
4403 *
4404 * The eeprom structure, irq and io ports in the adapter need to have
4405 * been set before calling this function.
4406 *
4407 * @host: The scsi host instance to fill in the values for.
4408 **/
4409 static void __init adapter_init_scsi_host(struct Scsi_Host *host)
4410 {
4411 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4412 struct NvRamType *eeprom = &acb->eeprom;
4413
4414 host->max_cmd_len = 24;
4415 host->can_queue = DC395x_MAX_CMD_QUEUE;
4416 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4417 host->this_id = (int)eeprom->scsi_id;
4418 host->io_port = acb->io_port_base;
4419 host->n_io_port = acb->io_port_len;
4420 host->dma_channel = -1;
4421 host->unique_id = acb->io_port_base;
4422 host->irq = acb->irq_level;
4423 host->last_reset = jiffies;
4424
4425 host->max_id = 16;
4426 if (host->max_id - 1 == eeprom->scsi_id)
4427 host->max_id--;
4428
4429 #ifdef CONFIG_SCSI_MULTI_LUN
4430 if (eeprom->channel_cfg & NAC_SCANLUN)
4431 host->max_lun = 8;
4432 else
4433 host->max_lun = 1;
4434 #else
4435 host->max_lun = 1;
4436 #endif
4437
4438 }
4439
4440
4441 /**
4442 * adapter_init_chip - Get the chip into a know state and figure out
4443 * some of the settings that apply to this adapter.
4444 *
4445 * The io port in the adapter needs to have been set before calling
4446 * this function. The config will be configured correctly on return.
4447 *
4448 * @acb: The adapter which we are to init.
4449 **/
4450 void __init adapter_init_chip(struct AdapterCtlBlk *acb)
4451 {
4452 struct NvRamType *eeprom = &acb->eeprom;
4453
4454 /* Mask all the interrupt */
4455 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4456 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4457
4458 /* Reset SCSI module */
4459 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4460
4461 /* Reset PCI/DMA module */
4462 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4463 udelay(20);
4464
4465 /* program configuration 0 */
4466 acb->config = HCC_AUTOTERM | HCC_PARITY;
4467 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4468 acb->config |= HCC_WIDE_CARD;
4469
4470 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4471 acb->config |= HCC_SCSI_RESET;
4472
4473 if (acb->config & HCC_SCSI_RESET) {
4474 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4475 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4476
4477 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4478 /*spin_unlock_irq (&io_request_lock); */
4479 udelay(500);
4480
4481 acb->scsi_host->last_reset =
4482 jiffies + HZ / 2 +
4483 HZ * acb->eeprom.delay_time;
4484
4485 /*spin_lock_irq (&io_request_lock); */
4486 }
4487 }
4488
4489
4490 /**
4491 * init_adapter - Grab the resource for the card, setup the adapter
4492 * information, set the card into a known state, create the various
4493 * tables etc etc. This basically gets all adapter information all up
4494 * to date, intialised and gets the chip in sync with it.
4495 *
4496 * @host: This hosts adapter structure
4497 * @io_port: The base I/O port
4498 * @irq: IRQ
4499 *
4500 * Returns 0 if the initialization succeeds, any other value on
4501 * failure.
4502 **/
4503 static int __init adapter_init(struct AdapterCtlBlk *acb, u32 io_port,
4504 u32 io_port_len, u8 irq)
4505 {
4506 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4507 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%x\n", io_port);
4508 goto failed;
4509 }
4510 /* store port base to indicate we have registered it */
4511 acb->io_port_base = io_port;
4512 acb->io_port_len = io_port_len;
4513
4514 if (request_irq(irq, dc395x_interrupt, SA_SHIRQ, DC395X_NAME, acb)) {
4515 /* release the region we just claimed */
4516 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4517 goto failed;
4518 }
4519 /* store irq to indicate we have registered it */
4520 acb->irq_level = irq;
4521
4522 /* get eeprom configuration information and command line settings etc */
4523 check_eeprom(&acb->eeprom, (u16)io_port);
4524 print_eeprom_settings(&acb->eeprom);
4525
4526 /* setup adapter control block */
4527 adapter_init_params(acb);
4528
4529 /* display card connectors/termination settings */
4530 adapter_print_config(acb);
4531
4532 if (adapter_sg_tables_alloc(acb)) {
4533 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4534 goto failed;
4535 }
4536 adapter_init_scsi_host(acb->scsi_host);
4537 adapter_init_chip(acb);
4538 set_basic_config(acb);
4539
4540 dprintkdbg(DBG_0,
4541 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4542 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4543 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4544 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4545 return 0;
4546
4547 failed:
4548 if (acb->irq_level)
4549 free_irq(acb->irq_level, acb);
4550 if (acb->io_port_base)
4551 release_region(acb->io_port_base, acb->io_port_len);
4552 adapter_sg_tables_free(acb);
4553
4554 return 1;
4555 }
4556
4557
4558 /**
4559 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4560 * stopping all operations and disabling interrupt generation on the
4561 * card.
4562 *
4563 * @acb: The adapter which we are to shutdown.
4564 **/
4565 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4566 {
4567 /* disable interrupts */
4568 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4569 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4570
4571 /* reset the scsi bus */
4572 if (acb->config & HCC_SCSI_RESET)
4573 reset_scsi_bus(acb);
4574
4575 /* clear any pending interupt state */
4576 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4577 }
4578
4579
4580
4581 /**
4582 * adapter_uninit - Shut down the chip and release any resources that
4583 * we had allocated. Once this returns the adapter should not be used
4584 * anymore.
4585 *
4586 * @acb: The adapter which we are to un-initialize.
4587 **/
4588 static void adapter_uninit(struct AdapterCtlBlk *acb)
4589 {
4590 unsigned long flags;
4591 DC395x_LOCK_IO(acb->scsi_host, flags);
4592
4593 /* remove timers */
4594 if (timer_pending(&acb->waiting_timer))
4595 del_timer(&acb->waiting_timer);
4596 if (timer_pending(&acb->selto_timer))
4597 del_timer(&acb->selto_timer);
4598
4599 adapter_uninit_chip(acb);
4600 adapter_remove_and_free_all_devices(acb);
4601 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4602
4603 if (acb->irq_level)
4604 free_irq(acb->irq_level, acb);
4605 if (acb->io_port_base)
4606 release_region(acb->io_port_base, acb->io_port_len);
4607
4608 adapter_sg_tables_free(acb);
4609 }
4610
4611
4612 #undef SPRINTF
4613 #define SPRINTF(args...) pos += sprintf(pos, args)
4614
4615 #undef YESNO
4616 #define YESNO(YN) \
4617 if (YN) SPRINTF(" Yes ");\
4618 else SPRINTF(" No ")
4619
4620 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4621 char **start, off_t offset, int length, int inout)
4622 {
4623 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4624 int spd, spd1;
4625 char *pos = buffer;
4626 struct DeviceCtlBlk *dcb;
4627 unsigned long flags;
4628 int dev;
4629
4630 if (inout) /* Has data been written to the file ? */
4631 return -EPERM;
4632
4633 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4634 SPRINTF(" Driver Version " DC395X_VERSION "\n");
4635
4636 DC395x_LOCK_IO(acb->scsi_host, flags);
4637
4638 SPRINTF("SCSI Host Nr %i, ", host->host_no);
4639 SPRINTF("DC395U/UW/F DC315/U %s\n",
4640 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4641 SPRINTF("io_port_base 0x%04x, ", acb->io_port_base);
4642 SPRINTF("irq_level 0x%02x, ", acb->irq_level);
4643 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4644
4645 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4646 SPRINTF("AdapterID %i\n", host->this_id);
4647
4648 SPRINTF("tag_max_num %i", acb->tag_max_num);
4649 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4650 SPRINTF(", FilterCfg 0x%02x",
4651 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4652 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4653 /*SPRINTF("\n"); */
4654
4655 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4656 SPRINTF
4657 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4658 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4659 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4660 acb->dcb_map[6], acb->dcb_map[7]);
4661 SPRINTF
4662 (" %02x %02x %02x %02x %02x %02x %02x %02x\n",
4663 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4664 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4665 acb->dcb_map[14], acb->dcb_map[15]);
4666
4667 SPRINTF
4668 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4669
4670 dev = 0;
4671 list_for_each_entry(dcb, &acb->dcb_list, list) {
4672 int nego_period;
4673 SPRINTF("%02i %02i %02i ", dev, dcb->target_id,
4674 dcb->target_lun);
4675 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4676 YESNO(dcb->sync_offset);
4677 YESNO(dcb->sync_period & WIDE_SYNC);
4678 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4679 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4680 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4681 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4682 if (dcb->sync_offset)
4683 SPRINTF(" %03i ns ", nego_period);
4684 else
4685 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4686
4687 if (dcb->sync_offset & 0x0f) {
4688 spd = 1000 / (nego_period);
4689 spd1 = 1000 % (nego_period);
4690 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4691 SPRINTF(" %2i.%1i M %02i ", spd, spd1,
4692 (dcb->sync_offset & 0x0f));
4693 } else
4694 SPRINTF(" ");
4695
4696 /* Add more info ... */
4697 SPRINTF(" %02i\n", dcb->max_command);
4698 dev++;
4699 }
4700
4701 if (timer_pending(&acb->waiting_timer))
4702 SPRINTF("Waiting queue timer running\n");
4703 else
4704 SPRINTF("\n");
4705
4706 list_for_each_entry(dcb, &acb->dcb_list, list) {
4707 struct ScsiReqBlk *srb;
4708 if (!list_empty(&dcb->srb_waiting_list))
4709 SPRINTF("DCB (%02i-%i): Waiting: %i:",
4710 dcb->target_id, dcb->target_lun,
4711 list_size(&dcb->srb_waiting_list));
4712 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4713 SPRINTF(" %li", srb->cmd->pid);
4714 if (!list_empty(&dcb->srb_going_list))
4715 SPRINTF("\nDCB (%02i-%i): Going : %i:",
4716 dcb->target_id, dcb->target_lun,
4717 list_size(&dcb->srb_going_list));
4718 list_for_each_entry(srb, &dcb->srb_going_list, list)
4719 SPRINTF(" %li", srb->cmd->pid);
4720 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4721 SPRINTF("\n");
4722 }
4723
4724 if (debug_enabled(DBG_1)) {
4725 SPRINTF("DCB list for ACB %p:\n", acb);
4726 list_for_each_entry(dcb, &acb->dcb_list, list) {
4727 SPRINTF("%p -> ", dcb);
4728 }
4729 SPRINTF("END\n");
4730 }
4731
4732 *start = buffer + offset;
4733 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4734
4735 if (pos - buffer < offset)
4736 return 0;
4737 else if (pos - buffer - offset < length)
4738 return pos - buffer - offset;
4739 else
4740 return length;
4741 }
4742
4743
4744 static struct scsi_host_template dc395x_driver_template = {
4745 .module = THIS_MODULE,
4746 .proc_name = DC395X_NAME,
4747 .proc_info = dc395x_proc_info,
4748 .name = DC395X_BANNER " " DC395X_VERSION,
4749 .queuecommand = dc395x_queue_command,
4750 .bios_param = dc395x_bios_param,
4751 .slave_alloc = dc395x_slave_alloc,
4752 .slave_destroy = dc395x_slave_destroy,
4753 .can_queue = DC395x_MAX_CAN_QUEUE,
4754 .this_id = 7,
4755 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4756 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4757 .eh_abort_handler = dc395x_eh_abort,
4758 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4759 .unchecked_isa_dma = 0,
4760 .use_clustering = DISABLE_CLUSTERING,
4761 };
4762
4763
4764 /**
4765 * banner_display - Display banner on first instance of driver
4766 * initialized.
4767 **/
4768 static void banner_display(void)
4769 {
4770 static int banner_done = 0;
4771 if (!banner_done)
4772 {
4773 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4774 banner_done = 1;
4775 }
4776 }
4777
4778
4779 /**
4780 * dc395x_init_one - Initialise a single instance of the adapter.
4781 *
4782 * The PCI layer will call this once for each instance of the adapter
4783 * that it finds in the system. The pci_dev strcuture indicates which
4784 * instance we are being called from.
4785 *
4786 * @dev: The PCI device to intialize.
4787 * @id: Looks like a pointer to the entry in our pci device table
4788 * that was actually matched by the PCI subsystem.
4789 *
4790 * Returns 0 on success, or an error code (-ve) on failure.
4791 **/
4792 static int __devinit dc395x_init_one(struct pci_dev *dev,
4793 const struct pci_device_id *id)
4794 {
4795 struct Scsi_Host *scsi_host;
4796 struct AdapterCtlBlk *acb;
4797 unsigned int io_port_base;
4798 unsigned int io_port_len;
4799 u8 irq;
4800
4801 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4802 banner_display();
4803
4804 if (pci_enable_device(dev))
4805 {
4806 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4807 return -ENODEV;
4808 }
4809 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4810 io_port_len = pci_resource_len(dev, 0);
4811 irq = dev->irq;
4812 dprintkdbg(DBG_0, "IO_PORT=%04x, IRQ=%x\n", io_port_base, dev->irq);
4813
4814 /* allocate scsi host information (includes out adapter) */
4815 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4816 sizeof(struct AdapterCtlBlk));
4817 if (!scsi_host) {
4818 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4819 return -ENOMEM;
4820 }
4821 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4822 acb->scsi_host = scsi_host;
4823
4824 /* initialise the adapter and everything we need */
4825 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4826 dprintkl(KERN_INFO, "adapter init failed\n");
4827 scsi_host_put(scsi_host);
4828 return -ENODEV;
4829 }
4830
4831 pci_set_master(dev);
4832
4833 /* get the scsi mid level to scan for new devices on the bus */
4834 if (scsi_add_host(scsi_host, &dev->dev)) {
4835 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4836 adapter_uninit(acb);
4837 scsi_host_put(scsi_host);
4838 return -ENODEV;
4839 }
4840 pci_set_drvdata(dev, scsi_host);
4841 scsi_scan_host(scsi_host);
4842
4843 return 0;
4844 }
4845
4846
4847 /**
4848 * dc395x_remove_one - Called to remove a single instance of the
4849 * adapter.
4850 *
4851 * @dev: The PCI device to intialize.
4852 **/
4853 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4854 {
4855 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4856 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4857
4858 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4859
4860 scsi_remove_host(scsi_host);
4861 adapter_uninit(acb);
4862 scsi_host_put(scsi_host);
4863 pci_set_drvdata(dev, NULL);
4864 }
4865
4866
4867 static struct pci_device_id dc395x_pci_table[] = {
4868 {
4869 .vendor = PCI_VENDOR_ID_TEKRAM,
4870 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4871 .subvendor = PCI_ANY_ID,
4872 .subdevice = PCI_ANY_ID,
4873 },
4874 {} /* Terminating entry */
4875 };
4876 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4877
4878
4879 static struct pci_driver dc395x_driver = {
4880 .name = DC395X_NAME,
4881 .id_table = dc395x_pci_table,
4882 .probe = dc395x_init_one,
4883 .remove = __devexit_p(dc395x_remove_one),
4884 };
4885
4886
4887 /**
4888 * dc395x_module_init - Module initialization function
4889 *
4890 * Used by both module and built-in driver to initialise this driver.
4891 **/
4892 static int __init dc395x_module_init(void)
4893 {
4894 return pci_module_init(&dc395x_driver);
4895 }
4896
4897
4898 /**
4899 * dc395x_module_exit - Module cleanup function.
4900 **/
4901 static void __exit dc395x_module_exit(void)
4902 {
4903 pci_unregister_driver(&dc395x_driver);
4904 }
4905
4906
4907 module_init(dc395x_module_init);
4908 module_exit(dc395x_module_exit);
4909
4910 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4911 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4912 MODULE_LICENSE("GPL");
Historical 2.5/2.6 development