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Merge tag 'iio-for-5.8a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio...
[mirror_ubuntu-hirsute-kernel.git] / drivers / scsi / dc395x.c
1 /*
2 * dc395x.c
3 *
4 * Device Driver for Tekram DC395(U/UW/F), DC315(U)
5 * PCI SCSI Bus Master Host Adapter
6 * (SCSI chip set used Tekram ASIC TRM-S1040)
7 *
8 * Authors:
9 * C.L. Huang <ching@tekram.com.tw>
10 * Erich Chen <erich@tekram.com.tw>
11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
12 *
13 * Kurt Garloff <garloff@suse.de>
14 * (C) 1999-2000 Kurt Garloff
15 *
16 * Oliver Neukum <oliver@neukum.name>
17 * Ali Akcaagac <aliakc@web.de>
18 * Jamie Lenehan <lenehan@twibble.org>
19 * (C) 2003
20 *
21 * License: GNU GPL
22 *
23 *************************************************************************
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. The name of the author may not be used to endorse or promote products
34 * derived from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 *
47 ************************************************************************
48 */
49 #include <linux/module.h>
50 #include <linux/moduleparam.h>
51 #include <linux/delay.h>
52 #include <linux/ctype.h>
53 #include <linux/blkdev.h>
54 #include <linux/interrupt.h>
55 #include <linux/init.h>
56 #include <linux/spinlock.h>
57 #include <linux/pci.h>
58 #include <linux/list.h>
59 #include <linux/vmalloc.h>
60 #include <linux/slab.h>
61 #include <asm/io.h>
62
63 #include <scsi/scsi.h>
64 #include <scsi/scsi_cmnd.h>
65 #include <scsi/scsi_device.h>
66 #include <scsi/scsi_host.h>
67
68 #include "dc395x.h"
69
70 #define DC395X_NAME "dc395x"
71 #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
72 #define DC395X_VERSION "v2.05, 2004/03/08"
73
74 /*---------------------------------------------------------------------------
75 Features
76 ---------------------------------------------------------------------------*/
77 /*
78 * Set to disable parts of the driver
79 */
80 /*#define DC395x_NO_DISCONNECT*/
81 /*#define DC395x_NO_TAGQ*/
82 /*#define DC395x_NO_SYNC*/
83 /*#define DC395x_NO_WIDE*/
84
85 /*---------------------------------------------------------------------------
86 Debugging
87 ---------------------------------------------------------------------------*/
88 /*
89 * Types of debugging that can be enabled and disabled
90 */
91 #define DBG_KG 0x0001
92 #define DBG_0 0x0002
93 #define DBG_1 0x0004
94 #define DBG_SG 0x0020
95 #define DBG_FIFO 0x0040
96 #define DBG_PIO 0x0080
97
98
99 /*
100 * Set set of things to output debugging for.
101 * Undefine to remove all debugging
102 */
103 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
104 /*#define DEBUG_MASK DBG_0*/
105
106
107 /*
108 * Output a kernel mesage at the specified level and append the
109 * driver name and a ": " to the start of the message
110 */
111 #define dprintkl(level, format, arg...) \
112 printk(level DC395X_NAME ": " format , ## arg)
113
114
115 #ifdef DEBUG_MASK
116 /*
117 * print a debug message - this is formated with KERN_DEBUG, then the
118 * driver name followed by a ": " and then the message is output.
119 * This also checks that the specified debug level is enabled before
120 * outputing the message
121 */
122 #define dprintkdbg(type, format, arg...) \
123 do { \
124 if ((type) & (DEBUG_MASK)) \
125 dprintkl(KERN_DEBUG , format , ## arg); \
126 } while (0)
127
128 /*
129 * Check if the specified type of debugging is enabled
130 */
131 #define debug_enabled(type) ((DEBUG_MASK) & (type))
132
133 #else
134 /*
135 * No debugging. Do nothing
136 */
137 #define dprintkdbg(type, format, arg...) \
138 do {} while (0)
139 #define debug_enabled(type) (0)
140
141 #endif
142
143
144 #ifndef PCI_VENDOR_ID_TEKRAM
145 #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */
146 #endif
147 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
148 #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */
149 #endif
150
151
152 #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
153 #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
154
155 #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address)))
156 #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address)))
157 #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address)))
158 #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address))
159 #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))
160 #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))
161
162 /* cmd->result */
163 #define RES_TARGET 0x000000FF /* Target State */
164 #define RES_TARGET_LNX STATUS_MASK /* Only official ... */
165 #define RES_ENDMSG 0x0000FF00 /* End Message */
166 #define RES_DID 0x00FF0000 /* DID_ codes */
167 #define RES_DRV 0xFF000000 /* DRIVER_ codes */
168
169 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
170 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
171
172 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
173 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
174 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
175 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
176 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
177
178 #define TAG_NONE 255
179
180 /*
181 * srb->segement_x is the hw sg list. It is always allocated as a
182 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
183 * cross a page boundy.
184 */
185 #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
186
187
188 struct SGentry {
189 u32 address; /* bus! address */
190 u32 length;
191 };
192
193 /* The SEEPROM structure for TRM_S1040 */
194 struct NVRamTarget {
195 u8 cfg0; /* Target configuration byte 0 */
196 u8 period; /* Target period */
197 u8 cfg2; /* Target configuration byte 2 */
198 u8 cfg3; /* Target configuration byte 3 */
199 };
200
201 struct NvRamType {
202 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */
203 u8 sub_sys_id[2]; /* 2,3 Sub System ID */
204 u8 sub_class; /* 4 Sub Class */
205 u8 vendor_id[2]; /* 5,6 Vendor ID */
206 u8 device_id[2]; /* 7,8 Device ID */
207 u8 reserved; /* 9 Reserved */
208 struct NVRamTarget target[DC395x_MAX_SCSI_ID];
209 /** 10,11,12,13
210 ** 14,15,16,17
211 ** ....
212 ** ....
213 ** 70,71,72,73
214 */
215 u8 scsi_id; /* 74 Host Adapter SCSI ID */
216 u8 channel_cfg; /* 75 Channel configuration */
217 u8 delay_time; /* 76 Power on delay time */
218 u8 max_tag; /* 77 Maximum tags */
219 u8 reserved0; /* 78 */
220 u8 boot_target; /* 79 */
221 u8 boot_lun; /* 80 */
222 u8 reserved1; /* 81 */
223 u16 reserved2[22]; /* 82,..125 */
224 u16 cksum; /* 126,127 */
225 };
226
227 struct ScsiReqBlk {
228 struct list_head list; /* next/prev ptrs for srb lists */
229 struct DeviceCtlBlk *dcb;
230 struct scsi_cmnd *cmd;
231
232 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */
233 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */
234
235 u8 sg_count; /* No of HW sg entries for this request */
236 u8 sg_index; /* Index of HW sg entry for this request */
237 size_t total_xfer_length; /* Total number of bytes remaining to be transferred */
238 size_t request_length; /* Total number of bytes in this request */
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 size_t 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 unsigned long io_port_base;
299 unsigned long 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 unsigned long last_reset;
311
312 u16 srb_count;
313
314 u8 sel_timeout;
315
316 unsigned int irq_level;
317 u8 tag_max_num;
318 u8 acb_flag;
319 u8 gmode2;
320
321 u8 config;
322 u8 lun_chk;
323 u8 scan_devices;
324 u8 hostid_bit;
325
326 u8 dcb_map[DC395x_MAX_SCSI_ID];
327 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
328
329 struct pci_dev *dev;
330
331 u8 msg_len;
332
333 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
334 struct ScsiReqBlk srb;
335
336 struct NvRamType eeprom; /* eeprom settings for this adapter */
337 };
338
339
340 /*---------------------------------------------------------------------------
341 Forward declarations
342 ---------------------------------------------------------------------------*/
343 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
344 u16 *pscsi_status);
345 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
346 u16 *pscsi_status);
347 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
348 u16 *pscsi_status);
349 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
350 u16 *pscsi_status);
351 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
352 u16 *pscsi_status);
353 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
354 u16 *pscsi_status);
355 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
356 u16 *pscsi_status);
357 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
358 u16 *pscsi_status);
359 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
360 u16 *pscsi_status);
361 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
362 u16 *pscsi_status);
363 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
364 u16 *pscsi_status);
365 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
366 u16 *pscsi_status);
367 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
368 u16 *pscsi_status);
369 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
370 u16 *pscsi_status);
371 static void set_basic_config(struct AdapterCtlBlk *acb);
372 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
373 struct ScsiReqBlk *srb);
374 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
375 static void data_io_transfer(struct AdapterCtlBlk *acb,
376 struct ScsiReqBlk *srb, u16 io_dir);
377 static void disconnect(struct AdapterCtlBlk *acb);
378 static void reselect(struct AdapterCtlBlk *acb);
379 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
380 struct ScsiReqBlk *srb);
381 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
382 struct ScsiReqBlk *srb);
383 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
384 struct ScsiReqBlk *srb);
385 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
386 struct scsi_cmnd *cmd, u8 force);
387 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
388 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
389 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
390 struct ScsiReqBlk *srb);
391 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
392 struct ScsiReqBlk *srb);
393 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
394 struct ScsiReqBlk *srb);
395 static void set_xfer_rate(struct AdapterCtlBlk *acb,
396 struct DeviceCtlBlk *dcb);
397 static void waiting_timeout(struct timer_list *t);
398
399
400 /*---------------------------------------------------------------------------
401 Static Data
402 ---------------------------------------------------------------------------*/
403 static u16 current_sync_offset = 0;
404
405 static void *dc395x_scsi_phase0[] = {
406 data_out_phase0,/* phase:0 */
407 data_in_phase0, /* phase:1 */
408 command_phase0, /* phase:2 */
409 status_phase0, /* phase:3 */
410 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
411 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
412 msgout_phase0, /* phase:6 */
413 msgin_phase0, /* phase:7 */
414 };
415
416 static void *dc395x_scsi_phase1[] = {
417 data_out_phase1,/* phase:0 */
418 data_in_phase1, /* phase:1 */
419 command_phase1, /* phase:2 */
420 status_phase1, /* phase:3 */
421 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
422 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
423 msgout_phase1, /* phase:6 */
424 msgin_phase1, /* phase:7 */
425 };
426
427 /*
428 *Fast20: 000 50ns, 20.0 MHz
429 * 001 75ns, 13.3 MHz
430 * 010 100ns, 10.0 MHz
431 * 011 125ns, 8.0 MHz
432 * 100 150ns, 6.6 MHz
433 * 101 175ns, 5.7 MHz
434 * 110 200ns, 5.0 MHz
435 * 111 250ns, 4.0 MHz
436 *
437 *Fast40(LVDS): 000 25ns, 40.0 MHz
438 * 001 50ns, 20.0 MHz
439 * 010 75ns, 13.3 MHz
440 * 011 100ns, 10.0 MHz
441 * 100 125ns, 8.0 MHz
442 * 101 150ns, 6.6 MHz
443 * 110 175ns, 5.7 MHz
444 * 111 200ns, 5.0 MHz
445 */
446 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
447
448 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
449 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
450 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
451
452
453 /*---------------------------------------------------------------------------
454 Configuration
455 ---------------------------------------------------------------------------*/
456 /*
457 * Module/boot parameters currently effect *all* instances of the
458 * card in the system.
459 */
460
461 /*
462 * Command line parameters are stored in a structure below.
463 * These are the index's into the structure for the various
464 * command line options.
465 */
466 #define CFG_ADAPTER_ID 0
467 #define CFG_MAX_SPEED 1
468 #define CFG_DEV_MODE 2
469 #define CFG_ADAPTER_MODE 3
470 #define CFG_TAGS 4
471 #define CFG_RESET_DELAY 5
472
473 #define CFG_NUM 6 /* number of configuration items */
474
475
476 /*
477 * Value used to indicate that a command line override
478 * hasn't been used to modify the value.
479 */
480 #define CFG_PARAM_UNSET -1
481
482
483 /*
484 * Hold command line parameters.
485 */
486 struct ParameterData {
487 int value; /* value of this setting */
488 int min; /* minimum value */
489 int max; /* maximum value */
490 int def; /* default value */
491 int safe; /* safe value */
492 };
493 static struct ParameterData cfg_data[] = {
494 { /* adapter id */
495 CFG_PARAM_UNSET,
496 0,
497 15,
498 7,
499 7
500 },
501 { /* max speed */
502 CFG_PARAM_UNSET,
503 0,
504 7,
505 1, /* 13.3Mhz */
506 4, /* 6.7Hmz */
507 },
508 { /* dev mode */
509 CFG_PARAM_UNSET,
510 0,
511 0x3f,
512 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
513 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
514 NTC_DO_SEND_START,
515 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
516 },
517 { /* adapter mode */
518 CFG_PARAM_UNSET,
519 0,
520 0x2f,
521 NAC_SCANLUN |
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 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 bool 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 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 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 number of actual seconds that the delay should be for.
621 */
622 static char 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 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 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 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 static inline 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 /* Sets the timer to wake us up */
756 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
757 {
758 if (timer_pending(&acb->waiting_timer))
759 return;
760 if (time_before(jiffies + to, acb->last_reset - HZ / 2))
761 acb->waiting_timer.expires =
762 acb->last_reset - HZ / 2 + 1;
763 else
764 acb->waiting_timer.expires = jiffies + to + 1;
765 add_timer(&acb->waiting_timer);
766 }
767
768
769 /* Send the next command from the waiting list to the bus */
770 static void waiting_process_next(struct AdapterCtlBlk *acb)
771 {
772 struct DeviceCtlBlk *start = NULL;
773 struct DeviceCtlBlk *pos;
774 struct DeviceCtlBlk *dcb;
775 struct ScsiReqBlk *srb;
776 struct list_head *dcb_list_head = &acb->dcb_list;
777
778 if (acb->active_dcb
779 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
780 return;
781
782 if (timer_pending(&acb->waiting_timer))
783 del_timer(&acb->waiting_timer);
784
785 if (list_empty(dcb_list_head))
786 return;
787
788 /*
789 * Find the starting dcb. Need to find it again in the list
790 * since the list may have changed since we set the ptr to it
791 */
792 list_for_each_entry(dcb, dcb_list_head, list)
793 if (dcb == acb->dcb_run_robin) {
794 start = dcb;
795 break;
796 }
797 if (!start) {
798 /* This can happen! */
799 start = list_entry(dcb_list_head->next, typeof(*start), list);
800 acb->dcb_run_robin = start;
801 }
802
803
804 /*
805 * Loop over the dcb, but we start somewhere (potentially) in
806 * the middle of the loop so we need to manully do this.
807 */
808 pos = start;
809 do {
810 struct list_head *waiting_list_head = &pos->srb_waiting_list;
811
812 /* Make sure, the next another device gets scheduled ... */
813 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
814 acb->dcb_run_robin);
815
816 if (list_empty(waiting_list_head) ||
817 pos->max_command <= list_size(&pos->srb_going_list)) {
818 /* move to next dcb */
819 pos = dcb_get_next(dcb_list_head, pos);
820 } else {
821 srb = list_entry(waiting_list_head->next,
822 struct ScsiReqBlk, list);
823
824 /* Try to send to the bus */
825 if (!start_scsi(acb, pos, srb))
826 list_move(&srb->list, &pos->srb_going_list);
827 else
828 waiting_set_timer(acb, HZ/50);
829 break;
830 }
831 } while (pos != start);
832 }
833
834
835 /* Wake up waiting queue */
836 static void waiting_timeout(struct timer_list *t)
837 {
838 unsigned long flags;
839 struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);
840 dprintkdbg(DBG_1,
841 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
842 DC395x_LOCK_IO(acb->scsi_host, flags);
843 waiting_process_next(acb);
844 DC395x_UNLOCK_IO(acb->scsi_host, flags);
845 }
846
847
848 /* Get the DCB for a given ID/LUN combination */
849 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
850 {
851 return acb->children[id][lun];
852 }
853
854
855 /* Send SCSI Request Block (srb) to adapter (acb) */
856 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
857 {
858 struct DeviceCtlBlk *dcb = srb->dcb;
859
860 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
861 acb->active_dcb ||
862 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
863 list_add_tail(&srb->list, &dcb->srb_waiting_list);
864 waiting_process_next(acb);
865 return;
866 }
867
868 if (!start_scsi(acb, dcb, srb)) {
869 list_add_tail(&srb->list, &dcb->srb_going_list);
870 } else {
871 list_add(&srb->list, &dcb->srb_waiting_list);
872 waiting_set_timer(acb, HZ / 50);
873 }
874 }
875
876 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
877 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
878 struct ScsiReqBlk *srb)
879 {
880 int nseg;
881 enum dma_data_direction dir = cmd->sc_data_direction;
882 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
883 cmd, dcb->target_id, dcb->target_lun);
884
885 srb->dcb = dcb;
886 srb->cmd = cmd;
887 srb->sg_count = 0;
888 srb->total_xfer_length = 0;
889 srb->sg_bus_addr = 0;
890 srb->sg_index = 0;
891 srb->adapter_status = 0;
892 srb->target_status = 0;
893 srb->msg_count = 0;
894 srb->status = 0;
895 srb->flag = 0;
896 srb->state = 0;
897 srb->retry_count = 0;
898 srb->tag_number = TAG_NONE;
899 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
900 srb->end_message = 0;
901
902 nseg = scsi_dma_map(cmd);
903 BUG_ON(nseg < 0);
904
905 if (dir == PCI_DMA_NONE || !nseg) {
906 dprintkdbg(DBG_0,
907 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
908 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
909 srb->segment_x[0].address);
910 } else {
911 int i;
912 u32 reqlen = scsi_bufflen(cmd);
913 struct scatterlist *sg;
914 struct SGentry *sgp = srb->segment_x;
915
916 srb->sg_count = nseg;
917
918 dprintkdbg(DBG_0,
919 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
920 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
921 srb->sg_count);
922
923 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
924 u32 busaddr = (u32)sg_dma_address(sg);
925 u32 seglen = (u32)sg->length;
926 sgp[i].address = busaddr;
927 sgp[i].length = seglen;
928 srb->total_xfer_length += seglen;
929 }
930 sgp += srb->sg_count - 1;
931
932 /*
933 * adjust last page if too big as it is allocated
934 * on even page boundaries
935 */
936 if (srb->total_xfer_length > reqlen) {
937 sgp->length -= (srb->total_xfer_length - reqlen);
938 srb->total_xfer_length = reqlen;
939 }
940
941 /* Fixup for WIDE padding - make sure length is even */
942 if (dcb->sync_period & WIDE_SYNC &&
943 srb->total_xfer_length % 2) {
944 srb->total_xfer_length++;
945 sgp->length++;
946 }
947
948 srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev,
949 srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE);
950
951 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
952 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
953 }
954
955 srb->request_length = srb->total_xfer_length;
956 }
957
958
959 /**
960 * dc395x_queue_command - queue scsi command passed from the mid
961 * layer, invoke 'done' on completion
962 *
963 * @cmd: pointer to scsi command object
964 * @done: function pointer to be invoked on completion
965 *
966 * Returns 1 if the adapter (host) is busy, else returns 0. One
967 * reason for an adapter to be busy is that the number
968 * of outstanding queued commands is already equal to
969 * struct Scsi_Host::can_queue .
970 *
971 * Required: if struct Scsi_Host::can_queue is ever non-zero
972 * then this function is required.
973 *
974 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
975 * and is expected to be held on return.
976 *
977 **/
978 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
979 {
980 struct DeviceCtlBlk *dcb;
981 struct ScsiReqBlk *srb;
982 struct AdapterCtlBlk *acb =
983 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
984 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
985 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
986
987 /* Assume BAD_TARGET; will be cleared later */
988 cmd->result = DID_BAD_TARGET << 16;
989
990 /* ignore invalid targets */
991 if (cmd->device->id >= acb->scsi_host->max_id ||
992 cmd->device->lun >= acb->scsi_host->max_lun ||
993 cmd->device->lun >31) {
994 goto complete;
995 }
996
997 /* does the specified lun on the specified device exist */
998 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
999 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1000 cmd->device->id, (u8)cmd->device->lun);
1001 goto complete;
1002 }
1003
1004 /* do we have a DCB for the device */
1005 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1006 if (!dcb) {
1007 /* should never happen */
1008 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1009 cmd->device->id, (u8)cmd->device->lun);
1010 goto complete;
1011 }
1012
1013 /* set callback and clear result in the command */
1014 cmd->scsi_done = done;
1015 cmd->result = 0;
1016
1017 srb = list_first_entry_or_null(&acb->srb_free_list,
1018 struct ScsiReqBlk, list);
1019 if (!srb) {
1020 /*
1021 * Return 1 since we are unable to queue this command at this
1022 * point in time.
1023 */
1024 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1025 return 1;
1026 }
1027 list_del(&srb->list);
1028
1029 build_srb(cmd, dcb, srb);
1030
1031 if (!list_empty(&dcb->srb_waiting_list)) {
1032 /* append to waiting queue */
1033 list_add_tail(&srb->list, &dcb->srb_waiting_list);
1034 waiting_process_next(acb);
1035 } else {
1036 /* process immediately */
1037 send_srb(acb, srb);
1038 }
1039 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1040 return 0;
1041
1042 complete:
1043 /*
1044 * Complete the command immediatey, and then return 0 to
1045 * indicate that we have handled the command. This is usually
1046 * done when the commad is for things like non existent
1047 * devices.
1048 */
1049 done(cmd);
1050 return 0;
1051 }
1052
1053 static DEF_SCSI_QCMD(dc395x_queue_command)
1054
1055 static void dump_register_info(struct AdapterCtlBlk *acb,
1056 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1057 {
1058 u16 pstat;
1059 struct pci_dev *dev = acb->dev;
1060 pci_read_config_word(dev, PCI_STATUS, &pstat);
1061 if (!dcb)
1062 dcb = acb->active_dcb;
1063 if (!srb && dcb)
1064 srb = dcb->active_srb;
1065 if (srb) {
1066 if (!srb->cmd)
1067 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1068 srb, srb->cmd);
1069 else
1070 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1071 "cmnd=0x%02x <%02i-%i>\n",
1072 srb, srb->cmd,
1073 srb->cmd->cmnd[0], srb->cmd->device->id,
1074 (u8)srb->cmd->device->lun);
1075 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1076 srb->segment_x, srb->sg_count, srb->sg_index,
1077 srb->total_xfer_length);
1078 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1079 srb->state, srb->status, srb->scsi_phase,
1080 (acb->active_dcb) ? "" : "not");
1081 }
1082 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1083 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1084 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1085 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1086 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1087 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1088 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1089 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1090 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1091 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1092 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1093 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1094 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1095 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1096 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1097 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1098 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1099 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1100 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1101 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1102 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1103 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1104 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1105 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1106 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1107 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1108 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1109 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1110 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1111 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1112 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1113 "pci{status=0x%04x}\n",
1114 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1115 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1116 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1117 pstat);
1118 }
1119
1120
1121 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1122 {
1123 #if debug_enabled(DBG_FIFO)
1124 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1125 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1126 if (!(fifocnt & 0x40))
1127 dprintkdbg(DBG_FIFO,
1128 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1129 fifocnt & 0x3f, lines, txt);
1130 #endif
1131 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1132 }
1133
1134
1135 static void reset_dev_param(struct AdapterCtlBlk *acb)
1136 {
1137 struct DeviceCtlBlk *dcb;
1138 struct NvRamType *eeprom = &acb->eeprom;
1139 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1140
1141 list_for_each_entry(dcb, &acb->dcb_list, list) {
1142 u8 period_index;
1143
1144 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1145 dcb->sync_period = 0;
1146 dcb->sync_offset = 0;
1147
1148 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1149 period_index = eeprom->target[dcb->target_id].period & 0x07;
1150 dcb->min_nego_period = clock_period[period_index];
1151 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1152 || !(acb->config & HCC_WIDE_CARD))
1153 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1154 }
1155 }
1156
1157
1158 /*
1159 * perform a hard reset on the SCSI bus
1160 * @cmd - some command for this host (for fetching hooks)
1161 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1162 */
1163 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1164 {
1165 struct AdapterCtlBlk *acb =
1166 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1167 dprintkl(KERN_INFO,
1168 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1169 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1170
1171 if (timer_pending(&acb->waiting_timer))
1172 del_timer(&acb->waiting_timer);
1173
1174 /*
1175 * disable interrupt
1176 */
1177 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1178 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1179 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1180 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1181
1182 reset_scsi_bus(acb);
1183 udelay(500);
1184
1185 /* We may be in serious trouble. Wait some seconds */
1186 acb->last_reset =
1187 jiffies + 3 * HZ / 2 +
1188 HZ * acb->eeprom.delay_time;
1189
1190 /*
1191 * re-enable interrupt
1192 */
1193 /* Clear SCSI FIFO */
1194 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1195 clear_fifo(acb, "eh_bus_reset");
1196 /* Delete pending IRQ */
1197 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1198 set_basic_config(acb);
1199
1200 reset_dev_param(acb);
1201 doing_srb_done(acb, DID_RESET, cmd, 0);
1202 acb->active_dcb = NULL;
1203 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1204 waiting_process_next(acb);
1205
1206 return SUCCESS;
1207 }
1208
1209 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1210 {
1211 int rc;
1212
1213 spin_lock_irq(cmd->device->host->host_lock);
1214 rc = __dc395x_eh_bus_reset(cmd);
1215 spin_unlock_irq(cmd->device->host->host_lock);
1216
1217 return rc;
1218 }
1219
1220 /*
1221 * abort an errant SCSI command
1222 * @cmd - command to be aborted
1223 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1224 */
1225 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1226 {
1227 /*
1228 * Look into our command queues: If it has not been sent already,
1229 * we remove it and return success. Otherwise fail.
1230 */
1231 struct AdapterCtlBlk *acb =
1232 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1233 struct DeviceCtlBlk *dcb;
1234 struct ScsiReqBlk *srb;
1235 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1236 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1237
1238 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1239 if (!dcb) {
1240 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1241 return FAILED;
1242 }
1243
1244 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1245 if (srb) {
1246 list_del(&srb->list);
1247 pci_unmap_srb_sense(acb, srb);
1248 pci_unmap_srb(acb, srb);
1249 free_tag(dcb, srb);
1250 list_add_tail(&srb->list, &acb->srb_free_list);
1251 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1252 cmd->result = DID_ABORT << 16;
1253 return SUCCESS;
1254 }
1255 srb = find_cmd(cmd, &dcb->srb_going_list);
1256 if (srb) {
1257 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1258 /* XXX: Should abort the command here */
1259 } else {
1260 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1261 }
1262 return FAILED;
1263 }
1264
1265
1266 /* SDTR */
1267 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1268 struct ScsiReqBlk *srb)
1269 {
1270 u8 *ptr = srb->msgout_buf + srb->msg_count;
1271 if (srb->msg_count > 1) {
1272 dprintkl(KERN_INFO,
1273 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1274 srb->msg_count, srb->msgout_buf[0],
1275 srb->msgout_buf[1]);
1276 return;
1277 }
1278 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1279 dcb->sync_offset = 0;
1280 dcb->min_nego_period = 200 >> 2;
1281 } else if (dcb->sync_offset == 0)
1282 dcb->sync_offset = SYNC_NEGO_OFFSET;
1283
1284 *ptr++ = MSG_EXTENDED; /* (01h) */
1285 *ptr++ = 3; /* length */
1286 *ptr++ = EXTENDED_SDTR; /* (01h) */
1287 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1288 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1289 srb->msg_count += 5;
1290 srb->state |= SRB_DO_SYNC_NEGO;
1291 }
1292
1293
1294 /* WDTR */
1295 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1296 struct ScsiReqBlk *srb)
1297 {
1298 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1299 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1300 u8 *ptr = srb->msgout_buf + srb->msg_count;
1301 if (srb->msg_count > 1) {
1302 dprintkl(KERN_INFO,
1303 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1304 srb->msg_count, srb->msgout_buf[0],
1305 srb->msgout_buf[1]);
1306 return;
1307 }
1308 *ptr++ = MSG_EXTENDED; /* (01h) */
1309 *ptr++ = 2; /* length */
1310 *ptr++ = EXTENDED_WDTR; /* (03h) */
1311 *ptr++ = wide;
1312 srb->msg_count += 4;
1313 srb->state |= SRB_DO_WIDE_NEGO;
1314 }
1315
1316
1317 #if 0
1318 /* Timer to work around chip flaw: When selecting and the bus is
1319 * busy, we sometimes miss a Selection timeout IRQ */
1320 void selection_timeout_missed(unsigned long ptr);
1321 /* Sets the timer to wake us up */
1322 static void selto_timer(struct AdapterCtlBlk *acb)
1323 {
1324 if (timer_pending(&acb->selto_timer))
1325 return;
1326 acb->selto_timer.function = selection_timeout_missed;
1327 acb->selto_timer.data = (unsigned long) acb;
1328 if (time_before
1329 (jiffies + HZ, acb->last_reset + HZ / 2))
1330 acb->selto_timer.expires =
1331 acb->last_reset + HZ / 2 + 1;
1332 else
1333 acb->selto_timer.expires = jiffies + HZ + 1;
1334 add_timer(&acb->selto_timer);
1335 }
1336
1337
1338 void selection_timeout_missed(unsigned long ptr)
1339 {
1340 unsigned long flags;
1341 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1342 struct ScsiReqBlk *srb;
1343 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1344 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1345 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1346 return;
1347 }
1348 DC395x_LOCK_IO(acb->scsi_host, flags);
1349 srb = acb->active_dcb->active_srb;
1350 disconnect(acb);
1351 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1352 }
1353 #endif
1354
1355
1356 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1357 struct ScsiReqBlk* srb)
1358 {
1359 u16 s_stat2, return_code;
1360 u8 s_stat, scsicommand, i, identify_message;
1361 u8 *ptr;
1362 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1363 dcb->target_id, dcb->target_lun, srb);
1364
1365 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1366
1367 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1368 s_stat2 = 0;
1369 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1370 #if 1
1371 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1372 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1373 s_stat, s_stat2);
1374 /*
1375 * Try anyway?
1376 *
1377 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1378 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1379 * (This is likely to be a bug in the hardware. Obviously, most people
1380 * only have one initiator per SCSI bus.)
1381 * Instead let this fail and have the timer make sure the command is
1382 * tried again after a short time
1383 */
1384 /*selto_timer (acb); */
1385 return 1;
1386 }
1387 #endif
1388 if (acb->active_dcb) {
1389 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1390 "command while another command (0x%p) is active.",
1391 srb->cmd,
1392 acb->active_dcb->active_srb ?
1393 acb->active_dcb->active_srb->cmd : 0);
1394 return 1;
1395 }
1396 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1397 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1398 return 1;
1399 }
1400 /* Allow starting of SCSI commands half a second before we allow the mid-level
1401 * to queue them again after a reset */
1402 if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1403 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1404 return 1;
1405 }
1406
1407 /* Flush FIFO */
1408 clear_fifo(acb, "start_scsi");
1409 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1410 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1411 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1412 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1413 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1414
1415 identify_message = dcb->identify_msg;
1416 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1417 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1418 if (srb->flag & AUTO_REQSENSE)
1419 identify_message &= 0xBF;
1420
1421 if (((srb->cmd->cmnd[0] == INQUIRY)
1422 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1423 || (srb->flag & AUTO_REQSENSE))
1424 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1425 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1426 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1427 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1428 && (dcb->target_lun == 0)) {
1429 srb->msgout_buf[0] = identify_message;
1430 srb->msg_count = 1;
1431 scsicommand = SCMD_SEL_ATNSTOP;
1432 srb->state = SRB_MSGOUT;
1433 #ifndef SYNC_FIRST
1434 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1435 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1436 build_wdtr(acb, dcb, srb);
1437 goto no_cmd;
1438 }
1439 #endif
1440 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1441 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1442 build_sdtr(acb, dcb, srb);
1443 goto no_cmd;
1444 }
1445 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1446 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1447 build_wdtr(acb, dcb, srb);
1448 goto no_cmd;
1449 }
1450 srb->msg_count = 0;
1451 }
1452 /* Send identify message */
1453 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1454
1455 scsicommand = SCMD_SEL_ATN;
1456 srb->state = SRB_START_;
1457 #ifndef DC395x_NO_TAGQ
1458 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1459 && (identify_message & 0xC0)) {
1460 /* Send Tag message */
1461 u32 tag_mask = 1;
1462 u8 tag_number = 0;
1463 while (tag_mask & dcb->tag_mask
1464 && tag_number < dcb->max_command) {
1465 tag_mask = tag_mask << 1;
1466 tag_number++;
1467 }
1468 if (tag_number >= dcb->max_command) {
1469 dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1470 "Out of tags target=<%02i-%i>)\n",
1471 srb->cmd, srb->cmd->device->id,
1472 (u8)srb->cmd->device->lun);
1473 srb->state = SRB_READY;
1474 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1475 DO_HWRESELECT);
1476 return 1;
1477 }
1478 /* Send Tag id */
1479 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1480 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1481 dcb->tag_mask |= tag_mask;
1482 srb->tag_number = tag_number;
1483 scsicommand = SCMD_SEL_ATN3;
1484 srb->state = SRB_START_;
1485 }
1486 #endif
1487 /*polling:*/
1488 /* Send CDB ..command block ......... */
1489 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1490 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1491 srb->cmd->cmnd[0], srb->tag_number);
1492 if (srb->flag & AUTO_REQSENSE) {
1493 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1494 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1495 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1496 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1497 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1498 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1499 } else {
1500 ptr = (u8 *)srb->cmd->cmnd;
1501 for (i = 0; i < srb->cmd->cmd_len; i++)
1502 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1503 }
1504 no_cmd:
1505 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1506 DO_HWRESELECT | DO_DATALATCH);
1507 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1508 /*
1509 * If start_scsi return 1:
1510 * we caught an interrupt (must be reset or reselection ... )
1511 * : Let's process it first!
1512 */
1513 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1514 srb->cmd, dcb->target_id, dcb->target_lun);
1515 srb->state = SRB_READY;
1516 free_tag(dcb, srb);
1517 srb->msg_count = 0;
1518 return_code = 1;
1519 /* This IRQ should NOT get lost, as we did not acknowledge it */
1520 } else {
1521 /*
1522 * If start_scsi returns 0:
1523 * we know that the SCSI processor is free
1524 */
1525 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1526 dcb->active_srb = srb;
1527 acb->active_dcb = dcb;
1528 return_code = 0;
1529 /* it's important for atn stop */
1530 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1531 DO_DATALATCH | DO_HWRESELECT);
1532 /* SCSI command */
1533 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1534 }
1535 return return_code;
1536 }
1537
1538
1539 #define DC395x_ENABLE_MSGOUT \
1540 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1541 srb->state |= SRB_MSGOUT
1542
1543
1544 /* abort command */
1545 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1546 struct ScsiReqBlk *srb)
1547 {
1548 srb->msgout_buf[0] = ABORT;
1549 srb->msg_count = 1;
1550 DC395x_ENABLE_MSGOUT;
1551 srb->state &= ~SRB_MSGIN;
1552 srb->state |= SRB_MSGOUT;
1553 }
1554
1555
1556 /**
1557 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1558 * have been triggered for this card.
1559 *
1560 * @acb: a pointer to the adpter control block
1561 * @scsi_status: the status return when we checked the card
1562 **/
1563 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1564 u16 scsi_status)
1565 {
1566 struct DeviceCtlBlk *dcb;
1567 struct ScsiReqBlk *srb;
1568 u16 phase;
1569 u8 scsi_intstatus;
1570 unsigned long flags;
1571 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1572 u16 *);
1573
1574 DC395x_LOCK_IO(acb->scsi_host, flags);
1575
1576 /* This acknowledges the IRQ */
1577 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1578 if ((scsi_status & 0x2007) == 0x2002)
1579 dprintkl(KERN_DEBUG,
1580 "COP after COP completed? %04x\n", scsi_status);
1581 if (debug_enabled(DBG_KG)) {
1582 if (scsi_intstatus & INT_SELTIMEOUT)
1583 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1584 }
1585 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1586
1587 if (timer_pending(&acb->selto_timer))
1588 del_timer(&acb->selto_timer);
1589
1590 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1591 disconnect(acb); /* bus free interrupt */
1592 goto out_unlock;
1593 }
1594 if (scsi_intstatus & INT_RESELECTED) {
1595 reselect(acb);
1596 goto out_unlock;
1597 }
1598 if (scsi_intstatus & INT_SELECT) {
1599 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1600 goto out_unlock;
1601 }
1602 if (scsi_intstatus & INT_SCSIRESET) {
1603 scsi_reset_detect(acb);
1604 goto out_unlock;
1605 }
1606 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1607 dcb = acb->active_dcb;
1608 if (!dcb) {
1609 dprintkl(KERN_DEBUG,
1610 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1611 scsi_status, scsi_intstatus);
1612 goto out_unlock;
1613 }
1614 srb = dcb->active_srb;
1615 if (dcb->flag & ABORT_DEV_) {
1616 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1617 enable_msgout_abort(acb, srb);
1618 }
1619
1620 /* software sequential machine */
1621 phase = (u16)srb->scsi_phase;
1622
1623 /*
1624 * 62037 or 62137
1625 * call dc395x_scsi_phase0[]... "phase entry"
1626 * handle every phase before start transfer
1627 */
1628 /* data_out_phase0, phase:0 */
1629 /* data_in_phase0, phase:1 */
1630 /* command_phase0, phase:2 */
1631 /* status_phase0, phase:3 */
1632 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1633 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1634 /* msgout_phase0, phase:6 */
1635 /* msgin_phase0, phase:7 */
1636 dc395x_statev = dc395x_scsi_phase0[phase];
1637 dc395x_statev(acb, srb, &scsi_status);
1638
1639 /*
1640 * if there were any exception occurred scsi_status
1641 * will be modify to bus free phase new scsi_status
1642 * transfer out from ... previous dc395x_statev
1643 */
1644 srb->scsi_phase = scsi_status & PHASEMASK;
1645 phase = (u16)scsi_status & PHASEMASK;
1646
1647 /*
1648 * call dc395x_scsi_phase1[]... "phase entry" handle
1649 * every phase to do transfer
1650 */
1651 /* data_out_phase1, phase:0 */
1652 /* data_in_phase1, phase:1 */
1653 /* command_phase1, phase:2 */
1654 /* status_phase1, phase:3 */
1655 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1656 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1657 /* msgout_phase1, phase:6 */
1658 /* msgin_phase1, phase:7 */
1659 dc395x_statev = dc395x_scsi_phase1[phase];
1660 dc395x_statev(acb, srb, &scsi_status);
1661 }
1662 out_unlock:
1663 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1664 }
1665
1666
1667 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1668 {
1669 struct AdapterCtlBlk *acb = dev_id;
1670 u16 scsi_status;
1671 u8 dma_status;
1672 irqreturn_t handled = IRQ_NONE;
1673
1674 /*
1675 * Check for pending interrupt
1676 */
1677 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1678 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1679 if (scsi_status & SCSIINTERRUPT) {
1680 /* interrupt pending - let's process it! */
1681 dc395x_handle_interrupt(acb, scsi_status);
1682 handled = IRQ_HANDLED;
1683 }
1684 else if (dma_status & 0x20) {
1685 /* Error from the DMA engine */
1686 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1687 #if 0
1688 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1689 if (acb->active_dcb) {
1690 acb->active_dcb-> flag |= ABORT_DEV_;
1691 if (acb->active_dcb->active_srb)
1692 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1693 }
1694 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1695 #else
1696 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1697 acb = NULL;
1698 #endif
1699 handled = IRQ_HANDLED;
1700 }
1701
1702 return handled;
1703 }
1704
1705
1706 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1707 u16 *pscsi_status)
1708 {
1709 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1710 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1711 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1712
1713 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1714 srb->state &= ~SRB_MSGOUT;
1715 }
1716
1717
1718 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1719 u16 *pscsi_status)
1720 {
1721 u16 i;
1722 u8 *ptr;
1723 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1724
1725 clear_fifo(acb, "msgout_phase1");
1726 if (!(srb->state & SRB_MSGOUT)) {
1727 srb->state |= SRB_MSGOUT;
1728 dprintkl(KERN_DEBUG,
1729 "msgout_phase1: (0x%p) Phase unexpected\n",
1730 srb->cmd); /* So what ? */
1731 }
1732 if (!srb->msg_count) {
1733 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1734 srb->cmd);
1735 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1736 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1737 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1738 return;
1739 }
1740 ptr = (u8 *)srb->msgout_buf;
1741 for (i = 0; i < srb->msg_count; i++)
1742 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1743 srb->msg_count = 0;
1744 if (srb->msgout_buf[0] == MSG_ABORT)
1745 srb->state = SRB_ABORT_SENT;
1746
1747 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1748 }
1749
1750
1751 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1752 u16 *pscsi_status)
1753 {
1754 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1755 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1756 }
1757
1758
1759 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1760 u16 *pscsi_status)
1761 {
1762 struct DeviceCtlBlk *dcb;
1763 u8 *ptr;
1764 u16 i;
1765 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1766
1767 clear_fifo(acb, "command_phase1");
1768 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1769 if (!(srb->flag & AUTO_REQSENSE)) {
1770 ptr = (u8 *)srb->cmd->cmnd;
1771 for (i = 0; i < srb->cmd->cmd_len; i++) {
1772 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1773 ptr++;
1774 }
1775 } else {
1776 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1777 dcb = acb->active_dcb;
1778 /* target id */
1779 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1780 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1781 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1782 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1783 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1784 }
1785 srb->state |= SRB_COMMAND;
1786 /* it's important for atn stop */
1787 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1788 /* SCSI command */
1789 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1790 }
1791
1792
1793 /*
1794 * Verify that the remaining space in the hw sg lists is the same as
1795 * the count of remaining bytes in srb->total_xfer_length
1796 */
1797 static void sg_verify_length(struct ScsiReqBlk *srb)
1798 {
1799 if (debug_enabled(DBG_SG)) {
1800 unsigned len = 0;
1801 unsigned idx = srb->sg_index;
1802 struct SGentry *psge = srb->segment_x + idx;
1803 for (; idx < srb->sg_count; psge++, idx++)
1804 len += psge->length;
1805 if (len != srb->total_xfer_length)
1806 dprintkdbg(DBG_SG,
1807 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1808 srb->total_xfer_length, len);
1809 }
1810 }
1811
1812
1813 /*
1814 * Compute the next Scatter Gather list index and adjust its length
1815 * and address if necessary
1816 */
1817 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1818 {
1819 u8 idx;
1820 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1821 struct SGentry *psge = srb->segment_x + srb->sg_index;
1822
1823 dprintkdbg(DBG_0,
1824 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1825 xferred, srb->total_xfer_length, left);
1826 if (xferred == 0) {
1827 /* nothing to update since we did not transfer any data */
1828 return;
1829 }
1830
1831 sg_verify_length(srb);
1832 srb->total_xfer_length = left; /* update remaining count */
1833 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1834 if (xferred >= psge->length) {
1835 /* Complete SG entries done */
1836 xferred -= psge->length;
1837 } else {
1838 /* Partial SG entry done */
1839 dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev,
1840 srb->sg_bus_addr, SEGMENTX_LEN,
1841 DMA_TO_DEVICE);
1842 psge->length -= xferred;
1843 psge->address += xferred;
1844 srb->sg_index = idx;
1845 dma_sync_single_for_device(&srb->dcb->acb->dev->dev,
1846 srb->sg_bus_addr, SEGMENTX_LEN,
1847 DMA_TO_DEVICE);
1848 break;
1849 }
1850 psge++;
1851 }
1852 sg_verify_length(srb);
1853 }
1854
1855
1856 /*
1857 * We have transferred a single byte (PIO mode?) and need to update
1858 * the count of bytes remaining (total_xfer_length) and update the sg
1859 * entry to either point to next byte in the current sg entry, or of
1860 * already at the end to point to the start of the next sg entry
1861 */
1862 static void sg_subtract_one(struct ScsiReqBlk *srb)
1863 {
1864 sg_update_list(srb, srb->total_xfer_length - 1);
1865 }
1866
1867
1868 /*
1869 * cleanup_after_transfer
1870 *
1871 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
1872 * KG: Currently called from StatusPhase1 ()
1873 * Should probably also be called from other places
1874 * Best might be to call it in DataXXPhase0, if new phase will differ
1875 */
1876 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
1877 struct ScsiReqBlk *srb)
1878 {
1879 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
1880 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
1881 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1882 clear_fifo(acb, "cleanup/in");
1883 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1884 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1885 } else { /* write */
1886 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1887 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1888 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1889 clear_fifo(acb, "cleanup/out");
1890 }
1891 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1892 }
1893
1894
1895 /*
1896 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
1897 * Seems to be needed for unknown reasons; could be a hardware bug :-(
1898 */
1899 #define DC395x_LASTPIO 4
1900
1901
1902 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1903 u16 *pscsi_status)
1904 {
1905 struct DeviceCtlBlk *dcb = srb->dcb;
1906 u16 scsi_status = *pscsi_status;
1907 u32 d_left_counter = 0;
1908 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
1909 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1910
1911 /*
1912 * KG: We need to drain the buffers before we draw any conclusions!
1913 * This means telling the DMA to push the rest into SCSI, telling
1914 * SCSI to push the rest to the bus.
1915 * However, the device might have been the one to stop us (phase
1916 * change), and the data in transit just needs to be accounted so
1917 * it can be retransmitted.)
1918 */
1919 /*
1920 * KG: Stop DMA engine pushing more data into the SCSI FIFO
1921 * If we need more data, the DMA SG list will be freshly set up, anyway
1922 */
1923 dprintkdbg(DBG_PIO, "data_out_phase0: "
1924 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
1925 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
1926 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1927 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1928 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1929 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
1930 srb->total_xfer_length);
1931 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
1932
1933 if (!(srb->state & SRB_XFERPAD)) {
1934 if (scsi_status & PARITYERROR)
1935 srb->status |= PARITY_ERROR;
1936
1937 /*
1938 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
1939 * is the no of bytes it got from the DMA engine not the no it
1940 * transferred successfully to the device. (And the difference could
1941 * be as much as the FIFO size, I guess ...)
1942 */
1943 if (!(scsi_status & SCSIXFERDONE)) {
1944 /*
1945 * when data transfer from DMA FIFO to SCSI FIFO
1946 * if there was some data left in SCSI FIFO
1947 */
1948 d_left_counter =
1949 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
1950 0x1F);
1951 if (dcb->sync_period & WIDE_SYNC)
1952 d_left_counter <<= 1;
1953
1954 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
1955 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
1956 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
1957 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1958 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
1959 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1960 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1961 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1962 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1963 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
1964 }
1965 /*
1966 * calculate all the residue data that not yet tranfered
1967 * SCSI transfer counter + left in SCSI FIFO data
1968 *
1969 * .....TRM_S1040_SCSI_COUNTER (24bits)
1970 * The counter always decrement by one for every SCSI byte transfer.
1971 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
1972 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
1973 */
1974 if (srb->total_xfer_length > DC395x_LASTPIO)
1975 d_left_counter +=
1976 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
1977
1978 /* Is this a good idea? */
1979 /*clear_fifo(acb, "DOP1"); */
1980 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
1981 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
1982 && scsi_bufflen(srb->cmd) % 2) {
1983 d_left_counter = 0;
1984 dprintkl(KERN_INFO,
1985 "data_out_phase0: Discard 1 byte (0x%02x)\n",
1986 scsi_status);
1987 }
1988 /*
1989 * KG: Oops again. Same thinko as above: The SCSI might have been
1990 * faster than the DMA engine, so that it ran out of data.
1991 * In that case, we have to do just nothing!
1992 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
1993 */
1994 /*
1995 * KG: This is nonsense: We have been WRITING data to the bus
1996 * If the SCSI engine has no bytes left, how should the DMA engine?
1997 */
1998 if (d_left_counter == 0) {
1999 srb->total_xfer_length = 0;
2000 } else {
2001 /*
2002 * if transfer not yet complete
2003 * there were some data residue in SCSI FIFO or
2004 * SCSI transfer counter not empty
2005 */
2006 long oldxferred =
2007 srb->total_xfer_length - d_left_counter;
2008 const int diff =
2009 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2010 sg_update_list(srb, d_left_counter);
2011 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2012 if ((srb->segment_x[srb->sg_index].length ==
2013 diff && scsi_sg_count(srb->cmd))
2014 || ((oldxferred & ~PAGE_MASK) ==
2015 (PAGE_SIZE - diff))
2016 ) {
2017 dprintkl(KERN_INFO, "data_out_phase0: "
2018 "Work around chip bug (%i)?\n", diff);
2019 d_left_counter =
2020 srb->total_xfer_length - diff;
2021 sg_update_list(srb, d_left_counter);
2022 /*srb->total_xfer_length -= diff; */
2023 /*srb->virt_addr += diff; */
2024 /*if (srb->cmd->use_sg) */
2025 /* srb->sg_index++; */
2026 }
2027 }
2028 }
2029 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2030 cleanup_after_transfer(acb, srb);
2031 }
2032 }
2033
2034
2035 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2036 u16 *pscsi_status)
2037 {
2038 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2039 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2040 clear_fifo(acb, "data_out_phase1");
2041 /* do prepare before transfer when data out phase */
2042 data_io_transfer(acb, srb, XFERDATAOUT);
2043 }
2044
2045 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2046 u16 *pscsi_status)
2047 {
2048 u16 scsi_status = *pscsi_status;
2049
2050 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2051 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2052
2053 /*
2054 * KG: DataIn is much more tricky than DataOut. When the device is finished
2055 * and switches to another phase, the SCSI engine should be finished too.
2056 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2057 * engine and transferred to memory.
2058 * We should wait for the FIFOs to be emptied by that (is there any way to
2059 * enforce this?) and then stop the DMA engine, because it might think, that
2060 * there are more bytes to follow. Yes, the device might disconnect prior to
2061 * having all bytes transferred!
2062 * Also we should make sure that all data from the DMA engine buffer's really
2063 * made its way to the system memory! Some documentation on this would not
2064 * seem to be a bad idea, actually.
2065 */
2066 if (!(srb->state & SRB_XFERPAD)) {
2067 u32 d_left_counter;
2068 unsigned int sc, fc;
2069
2070 if (scsi_status & PARITYERROR) {
2071 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2072 "Parity Error\n", srb->cmd);
2073 srb->status |= PARITY_ERROR;
2074 }
2075 /*
2076 * KG: We should wait for the DMA FIFO to be empty ...
2077 * but: it would be better to wait first for the SCSI FIFO and then the
2078 * the DMA FIFO to become empty? How do we know, that the device not already
2079 * sent data to the FIFO in a MsgIn phase, eg.?
2080 */
2081 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2082 #if 0
2083 int ctr = 6000000;
2084 dprintkl(KERN_DEBUG,
2085 "DIP0: Wait for DMA FIFO to flush ...\n");
2086 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2087 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2088 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2089 while (!
2090 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2091 0x80) && --ctr);
2092 if (ctr < 6000000 - 1)
2093 dprintkl(KERN_DEBUG
2094 "DIP0: Had to wait for DMA ...\n");
2095 if (!ctr)
2096 dprintkl(KERN_ERR,
2097 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2098 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2099 #endif
2100 dprintkdbg(DBG_KG, "data_in_phase0: "
2101 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2102 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2103 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2104 }
2105 /* Now: Check remainig data: The SCSI counters should tell us ... */
2106 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2107 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2108 d_left_counter = sc + ((fc & 0x1f)
2109 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2110 0));
2111 dprintkdbg(DBG_KG, "data_in_phase0: "
2112 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2113 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2114 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2115 fc,
2116 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2117 sc,
2118 fc,
2119 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2120 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2121 srb->total_xfer_length, d_left_counter);
2122 #if DC395x_LASTPIO
2123 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2124 if (d_left_counter
2125 && srb->total_xfer_length <= DC395x_LASTPIO) {
2126 size_t left_io = srb->total_xfer_length;
2127
2128 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2129 /*sg_update_list (srb, d_left_counter); */
2130 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2131 "for remaining %i bytes:",
2132 fc & 0x1f,
2133 (srb->dcb->sync_period & WIDE_SYNC) ?
2134 "words" : "bytes",
2135 srb->total_xfer_length);
2136 if (srb->dcb->sync_period & WIDE_SYNC)
2137 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2138 CFG2_WIDEFIFO);
2139 while (left_io) {
2140 unsigned char *virt, *base = NULL;
2141 unsigned long flags = 0;
2142 size_t len = left_io;
2143 size_t offset = srb->request_length - left_io;
2144
2145 local_irq_save(flags);
2146 /* Assumption: it's inside one page as it's at most 4 bytes and
2147 I just assume it's on a 4-byte boundary */
2148 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2149 srb->sg_count, &offset, &len);
2150 virt = base + offset;
2151
2152 left_io -= len;
2153
2154 while (len) {
2155 u8 byte;
2156 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2157 *virt++ = byte;
2158
2159 if (debug_enabled(DBG_PIO))
2160 printk(" %02x", byte);
2161
2162 d_left_counter--;
2163 sg_subtract_one(srb);
2164
2165 len--;
2166
2167 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2168
2169 if (fc == 0x40) {
2170 left_io = 0;
2171 break;
2172 }
2173 }
2174
2175 WARN_ON((fc != 0x40) == !d_left_counter);
2176
2177 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2178 /* Read the last byte ... */
2179 if (srb->total_xfer_length > 0) {
2180 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2181
2182 *virt++ = byte;
2183 srb->total_xfer_length--;
2184 if (debug_enabled(DBG_PIO))
2185 printk(" %02x", byte);
2186 }
2187
2188 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2189 }
2190
2191 scsi_kunmap_atomic_sg(base);
2192 local_irq_restore(flags);
2193 }
2194 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2195 /*srb->total_xfer_length = 0; */
2196 if (debug_enabled(DBG_PIO))
2197 printk("\n");
2198 }
2199 #endif /* DC395x_LASTPIO */
2200
2201 #if 0
2202 /*
2203 * KG: This was in DATAOUT. Does it also belong here?
2204 * Nobody seems to know what counter and fifo_cnt count exactly ...
2205 */
2206 if (!(scsi_status & SCSIXFERDONE)) {
2207 /*
2208 * when data transfer from DMA FIFO to SCSI FIFO
2209 * if there was some data left in SCSI FIFO
2210 */
2211 d_left_counter =
2212 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2213 0x1F);
2214 if (srb->dcb->sync_period & WIDE_SYNC)
2215 d_left_counter <<= 1;
2216 /*
2217 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2218 * so need to *= 2
2219 * KG: Seems to be correct ...
2220 */
2221 }
2222 #endif
2223 /* KG: This should not be needed any more! */
2224 if (d_left_counter == 0
2225 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2226 #if 0
2227 int ctr = 6000000;
2228 u8 TempDMAstatus;
2229 do {
2230 TempDMAstatus =
2231 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2232 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2233 if (!ctr)
2234 dprintkl(KERN_ERR,
2235 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2236 srb->total_xfer_length = 0;
2237 #endif
2238 srb->total_xfer_length = d_left_counter;
2239 } else { /* phase changed */
2240 /*
2241 * parsing the case:
2242 * when a transfer not yet complete
2243 * but be disconnected by target
2244 * if transfer not yet complete
2245 * there were some data residue in SCSI FIFO or
2246 * SCSI transfer counter not empty
2247 */
2248 sg_update_list(srb, d_left_counter);
2249 }
2250 }
2251 /* KG: The target may decide to disconnect: Empty FIFO before! */
2252 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2253 cleanup_after_transfer(acb, srb);
2254 }
2255 }
2256
2257
2258 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2259 u16 *pscsi_status)
2260 {
2261 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2262 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2263 data_io_transfer(acb, srb, XFERDATAIN);
2264 }
2265
2266
2267 static void data_io_transfer(struct AdapterCtlBlk *acb,
2268 struct ScsiReqBlk *srb, u16 io_dir)
2269 {
2270 struct DeviceCtlBlk *dcb = srb->dcb;
2271 u8 bval;
2272 dprintkdbg(DBG_0,
2273 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2274 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2275 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2276 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2277 if (srb == acb->tmp_srb)
2278 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2279 if (srb->sg_index >= srb->sg_count) {
2280 /* can't happen? out of bounds error */
2281 return;
2282 }
2283
2284 if (srb->total_xfer_length > DC395x_LASTPIO) {
2285 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2286 /*
2287 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2288 * Maybe, even ABORTXFER would be appropriate
2289 */
2290 if (dma_status & XFERPENDING) {
2291 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2292 "Expect trouble!\n");
2293 dump_register_info(acb, dcb, srb);
2294 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2295 }
2296 /* clear_fifo(acb, "IO"); */
2297 /*
2298 * load what physical address of Scatter/Gather list table
2299 * want to be transfer
2300 */
2301 srb->state |= SRB_DATA_XFER;
2302 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2303 if (scsi_sg_count(srb->cmd)) { /* with S/G */
2304 io_dir |= DMACMD_SG;
2305 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2306 srb->sg_bus_addr +
2307 sizeof(struct SGentry) *
2308 srb->sg_index);
2309 /* load how many bytes in the sg list table */
2310 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2311 ((u32)(srb->sg_count -
2312 srb->sg_index) << 3));
2313 } else { /* without S/G */
2314 io_dir &= ~DMACMD_SG;
2315 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2316 srb->segment_x[0].address);
2317 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2318 srb->segment_x[0].length);
2319 }
2320 /* load total transfer length (24bits) max value 16Mbyte */
2321 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2322 srb->total_xfer_length);
2323 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2324 if (io_dir & DMACMD_DIR) { /* read */
2325 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2326 SCMD_DMA_IN);
2327 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2328 } else {
2329 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2330 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2331 SCMD_DMA_OUT);
2332 }
2333
2334 }
2335 #if DC395x_LASTPIO
2336 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2337 /*
2338 * load what physical address of Scatter/Gather list table
2339 * want to be transfer
2340 */
2341 srb->state |= SRB_DATA_XFER;
2342 /* load total transfer length (24bits) max value 16Mbyte */
2343 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2344 srb->total_xfer_length);
2345 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2346 if (io_dir & DMACMD_DIR) { /* read */
2347 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2348 SCMD_FIFO_IN);
2349 } else { /* write */
2350 int ln = srb->total_xfer_length;
2351 size_t left_io = srb->total_xfer_length;
2352
2353 if (srb->dcb->sync_period & WIDE_SYNC)
2354 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2355 CFG2_WIDEFIFO);
2356
2357 while (left_io) {
2358 unsigned char *virt, *base = NULL;
2359 unsigned long flags = 0;
2360 size_t len = left_io;
2361 size_t offset = srb->request_length - left_io;
2362
2363 local_irq_save(flags);
2364 /* Again, max 4 bytes */
2365 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2366 srb->sg_count, &offset, &len);
2367 virt = base + offset;
2368
2369 left_io -= len;
2370
2371 while (len--) {
2372 if (debug_enabled(DBG_PIO))
2373 printk(" %02x", *virt);
2374
2375 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2376
2377 sg_subtract_one(srb);
2378 }
2379
2380 scsi_kunmap_atomic_sg(base);
2381 local_irq_restore(flags);
2382 }
2383 if (srb->dcb->sync_period & WIDE_SYNC) {
2384 if (ln % 2) {
2385 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2386 if (debug_enabled(DBG_PIO))
2387 printk(" |00");
2388 }
2389 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2390 }
2391 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2392 if (debug_enabled(DBG_PIO))
2393 printk("\n");
2394 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2395 SCMD_FIFO_OUT);
2396 }
2397 }
2398 #endif /* DC395x_LASTPIO */
2399 else { /* xfer pad */
2400 u8 data = 0, data2 = 0;
2401 if (srb->sg_count) {
2402 srb->adapter_status = H_OVER_UNDER_RUN;
2403 srb->status |= OVER_RUN;
2404 }
2405 /*
2406 * KG: despite the fact that we are using 16 bits I/O ops
2407 * the SCSI FIFO is only 8 bits according to the docs
2408 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2409 */
2410 if (dcb->sync_period & WIDE_SYNC) {
2411 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2412 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2413 CFG2_WIDEFIFO);
2414 if (io_dir & DMACMD_DIR) {
2415 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2416 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2417 } else {
2418 /* Danger, Robinson: If you find KGs
2419 * scattered over the wide disk, the driver
2420 * or chip is to blame :-( */
2421 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2422 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2423 }
2424 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2425 } else {
2426 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2427 /* Danger, Robinson: If you find a collection of Ks on your disk
2428 * something broke :-( */
2429 if (io_dir & DMACMD_DIR)
2430 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2431 else
2432 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2433 }
2434 srb->state |= SRB_XFERPAD;
2435 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2436 /* SCSI command */
2437 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2438 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2439 }
2440 }
2441
2442
2443 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2444 u16 *pscsi_status)
2445 {
2446 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2447 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2448 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2449 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2450 srb->state = SRB_COMPLETED;
2451 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2452 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2453 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2454 }
2455
2456
2457 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2458 u16 *pscsi_status)
2459 {
2460 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2461 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2462 srb->state = SRB_STATUS;
2463 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2464 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2465 }
2466
2467
2468 /* Check if the message is complete */
2469 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2470 {
2471 if (*msgbuf == EXTENDED_MESSAGE) {
2472 if (len < 2)
2473 return 0;
2474 if (len < msgbuf[1] + 2)
2475 return 0;
2476 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2477 if (len < 2)
2478 return 0;
2479 return 1;
2480 }
2481
2482 /* reject_msg */
2483 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2484 struct ScsiReqBlk *srb)
2485 {
2486 srb->msgout_buf[0] = MESSAGE_REJECT;
2487 srb->msg_count = 1;
2488 DC395x_ENABLE_MSGOUT;
2489 srb->state &= ~SRB_MSGIN;
2490 srb->state |= SRB_MSGOUT;
2491 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2492 srb->msgin_buf[0],
2493 srb->dcb->target_id, srb->dcb->target_lun);
2494 }
2495
2496
2497 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2498 struct DeviceCtlBlk *dcb, u8 tag)
2499 {
2500 struct ScsiReqBlk *srb = NULL;
2501 struct ScsiReqBlk *i;
2502 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2503 srb->cmd, tag, srb);
2504
2505 if (!(dcb->tag_mask & (1 << tag)))
2506 dprintkl(KERN_DEBUG,
2507 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2508 dcb->tag_mask, tag);
2509
2510 if (list_empty(&dcb->srb_going_list))
2511 goto mingx0;
2512 list_for_each_entry(i, &dcb->srb_going_list, list) {
2513 if (i->tag_number == tag) {
2514 srb = i;
2515 break;
2516 }
2517 }
2518 if (!srb)
2519 goto mingx0;
2520
2521 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2522 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2523 if (dcb->flag & ABORT_DEV_) {
2524 /*srb->state = SRB_ABORT_SENT; */
2525 enable_msgout_abort(acb, srb);
2526 }
2527
2528 if (!(srb->state & SRB_DISCONNECT))
2529 goto mingx0;
2530
2531 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2532 srb->state |= dcb->active_srb->state;
2533 srb->state |= SRB_DATA_XFER;
2534 dcb->active_srb = srb;
2535 /* How can we make the DORS happy? */
2536 return srb;
2537
2538 mingx0:
2539 srb = acb->tmp_srb;
2540 srb->state = SRB_UNEXPECT_RESEL;
2541 dcb->active_srb = srb;
2542 srb->msgout_buf[0] = MSG_ABORT_TAG;
2543 srb->msg_count = 1;
2544 DC395x_ENABLE_MSGOUT;
2545 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2546 return srb;
2547 }
2548
2549
2550 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2551 struct DeviceCtlBlk *dcb)
2552 {
2553 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2554 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2555 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2556 set_xfer_rate(acb, dcb);
2557 }
2558
2559
2560 /* set async transfer mode */
2561 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2562 {
2563 struct DeviceCtlBlk *dcb = srb->dcb;
2564 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2565 dcb->target_id, dcb->target_lun);
2566
2567 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2568 dcb->sync_mode |= SYNC_NEGO_DONE;
2569 /*dcb->sync_period &= 0; */
2570 dcb->sync_offset = 0;
2571 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2572 srb->state &= ~SRB_DO_SYNC_NEGO;
2573 reprogram_regs(acb, dcb);
2574 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2575 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2576 build_wdtr(acb, dcb, srb);
2577 DC395x_ENABLE_MSGOUT;
2578 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2579 }
2580 }
2581
2582
2583 /* set sync transfer mode */
2584 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2585 {
2586 struct DeviceCtlBlk *dcb = srb->dcb;
2587 u8 bval;
2588 int fact;
2589 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2590 "(%02i.%01i MHz) Offset %i\n",
2591 dcb->target_id, srb->msgin_buf[3] << 2,
2592 (250 / srb->msgin_buf[3]),
2593 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2594 srb->msgin_buf[4]);
2595
2596 if (srb->msgin_buf[4] > 15)
2597 srb->msgin_buf[4] = 15;
2598 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2599 dcb->sync_offset = 0;
2600 else if (dcb->sync_offset == 0)
2601 dcb->sync_offset = srb->msgin_buf[4];
2602 if (srb->msgin_buf[4] > dcb->sync_offset)
2603 srb->msgin_buf[4] = dcb->sync_offset;
2604 else
2605 dcb->sync_offset = srb->msgin_buf[4];
2606 bval = 0;
2607 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2608 || dcb->min_nego_period >
2609 clock_period[bval]))
2610 bval++;
2611 if (srb->msgin_buf[3] < clock_period[bval])
2612 dprintkl(KERN_INFO,
2613 "msgin_set_sync: Increase sync nego period to %ins\n",
2614 clock_period[bval] << 2);
2615 srb->msgin_buf[3] = clock_period[bval];
2616 dcb->sync_period &= 0xf0;
2617 dcb->sync_period |= ALT_SYNC | bval;
2618 dcb->min_nego_period = srb->msgin_buf[3];
2619
2620 if (dcb->sync_period & WIDE_SYNC)
2621 fact = 500;
2622 else
2623 fact = 250;
2624
2625 dprintkl(KERN_INFO,
2626 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2627 dcb->target_id, (fact == 500) ? "Wide16" : "",
2628 dcb->min_nego_period << 2, dcb->sync_offset,
2629 (fact / dcb->min_nego_period),
2630 ((fact % dcb->min_nego_period) * 10 +
2631 dcb->min_nego_period / 2) / dcb->min_nego_period);
2632
2633 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2634 /* Reply with corrected SDTR Message */
2635 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2636 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2637
2638 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2639 srb->msg_count = 5;
2640 DC395x_ENABLE_MSGOUT;
2641 dcb->sync_mode |= SYNC_NEGO_DONE;
2642 } else {
2643 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2644 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2645 build_wdtr(acb, dcb, srb);
2646 DC395x_ENABLE_MSGOUT;
2647 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2648 }
2649 }
2650 srb->state &= ~SRB_DO_SYNC_NEGO;
2651 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2652
2653 reprogram_regs(acb, dcb);
2654 }
2655
2656
2657 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2658 struct ScsiReqBlk *srb)
2659 {
2660 struct DeviceCtlBlk *dcb = srb->dcb;
2661 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2662
2663 dcb->sync_period &= ~WIDE_SYNC;
2664 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2665 dcb->sync_mode |= WIDE_NEGO_DONE;
2666 srb->state &= ~SRB_DO_WIDE_NEGO;
2667 reprogram_regs(acb, dcb);
2668 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2669 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2670 build_sdtr(acb, dcb, srb);
2671 DC395x_ENABLE_MSGOUT;
2672 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2673 }
2674 }
2675
2676 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2677 {
2678 struct DeviceCtlBlk *dcb = srb->dcb;
2679 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2680 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2681 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2682
2683 if (srb->msgin_buf[3] > wide)
2684 srb->msgin_buf[3] = wide;
2685 /* Completed */
2686 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2687 dprintkl(KERN_DEBUG,
2688 "msgin_set_wide: Wide nego initiated <%02i>\n",
2689 dcb->target_id);
2690 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2691 srb->msg_count = 4;
2692 srb->state |= SRB_DO_WIDE_NEGO;
2693 DC395x_ENABLE_MSGOUT;
2694 }
2695
2696 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2697 if (srb->msgin_buf[3] > 0)
2698 dcb->sync_period |= WIDE_SYNC;
2699 else
2700 dcb->sync_period &= ~WIDE_SYNC;
2701 srb->state &= ~SRB_DO_WIDE_NEGO;
2702 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2703 dprintkdbg(DBG_1,
2704 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2705 (8 << srb->msgin_buf[3]), dcb->target_id);
2706 reprogram_regs(acb, dcb);
2707 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2708 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2709 build_sdtr(acb, dcb, srb);
2710 DC395x_ENABLE_MSGOUT;
2711 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2712 }
2713 }
2714
2715
2716 /*
2717 * extended message codes:
2718 *
2719 * code description
2720 *
2721 * 02h Reserved
2722 * 00h MODIFY DATA POINTER
2723 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2724 * 03h WIDE DATA TRANSFER REQUEST
2725 * 04h - 7Fh Reserved
2726 * 80h - FFh Vendor specific
2727 */
2728 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2729 u16 *pscsi_status)
2730 {
2731 struct DeviceCtlBlk *dcb = acb->active_dcb;
2732 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2733
2734 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2735 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2736 /* Now eval the msg */
2737 switch (srb->msgin_buf[0]) {
2738 case DISCONNECT:
2739 srb->state = SRB_DISCONNECT;
2740 break;
2741
2742 case SIMPLE_QUEUE_TAG:
2743 case HEAD_OF_QUEUE_TAG:
2744 case ORDERED_QUEUE_TAG:
2745 srb =
2746 msgin_qtag(acb, dcb,
2747 srb->msgin_buf[1]);
2748 break;
2749
2750 case MESSAGE_REJECT:
2751 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2752 DO_CLRATN | DO_DATALATCH);
2753 /* A sync nego message was rejected ! */
2754 if (srb->state & SRB_DO_SYNC_NEGO) {
2755 msgin_set_async(acb, srb);
2756 break;
2757 }
2758 /* A wide nego message was rejected ! */
2759 if (srb->state & SRB_DO_WIDE_NEGO) {
2760 msgin_set_nowide(acb, srb);
2761 break;
2762 }
2763 enable_msgout_abort(acb, srb);
2764 /*srb->state |= SRB_ABORT_SENT */
2765 break;
2766
2767 case EXTENDED_MESSAGE:
2768 /* SDTR */
2769 if (srb->msgin_buf[1] == 3
2770 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2771 msgin_set_sync(acb, srb);
2772 break;
2773 }
2774 /* WDTR */
2775 if (srb->msgin_buf[1] == 2
2776 && srb->msgin_buf[2] == EXTENDED_WDTR
2777 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2778 msgin_set_wide(acb, srb);
2779 break;
2780 }
2781 msgin_reject(acb, srb);
2782 break;
2783
2784 case MSG_IGNOREWIDE:
2785 /* Discard wide residual */
2786 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2787 break;
2788
2789 case COMMAND_COMPLETE:
2790 /* nothing has to be done */
2791 break;
2792
2793 case SAVE_POINTERS:
2794 /*
2795 * SAVE POINTER may be ignored as we have the struct
2796 * ScsiReqBlk* associated with the scsi command.
2797 */
2798 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2799 "SAVE POINTER rem=%i Ignore\n",
2800 srb->cmd, srb->total_xfer_length);
2801 break;
2802
2803 case RESTORE_POINTERS:
2804 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2805 break;
2806
2807 case ABORT:
2808 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2809 "<%02i-%i> ABORT msg\n",
2810 srb->cmd, dcb->target_id,
2811 dcb->target_lun);
2812 dcb->flag |= ABORT_DEV_;
2813 enable_msgout_abort(acb, srb);
2814 break;
2815
2816 default:
2817 /* reject unknown messages */
2818 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2819 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2820 srb->msg_count = 1;
2821 srb->msgout_buf[0] = dcb->identify_msg;
2822 DC395x_ENABLE_MSGOUT;
2823 srb->state |= SRB_MSGOUT;
2824 /*break; */
2825 }
2826 msgin_reject(acb, srb);
2827 }
2828
2829 /* Clear counter and MsgIn state */
2830 srb->state &= ~SRB_MSGIN;
2831 acb->msg_len = 0;
2832 }
2833 *pscsi_status = PH_BUS_FREE;
2834 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2835 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2836 }
2837
2838
2839 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2840 u16 *pscsi_status)
2841 {
2842 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2843 clear_fifo(acb, "msgin_phase1");
2844 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2845 if (!(srb->state & SRB_MSGIN)) {
2846 srb->state &= ~SRB_DISCONNECT;
2847 srb->state |= SRB_MSGIN;
2848 }
2849 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2850 /* SCSI command */
2851 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2852 }
2853
2854
2855 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2856 u16 *pscsi_status)
2857 {
2858 }
2859
2860
2861 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2862 u16 *pscsi_status)
2863 {
2864 }
2865
2866
2867 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
2868 {
2869 struct DeviceCtlBlk *i;
2870
2871 /* set all lun device's period, offset */
2872 if (dcb->identify_msg & 0x07)
2873 return;
2874
2875 if (acb->scan_devices) {
2876 current_sync_offset = dcb->sync_offset;
2877 return;
2878 }
2879
2880 list_for_each_entry(i, &acb->dcb_list, list)
2881 if (i->target_id == dcb->target_id) {
2882 i->sync_period = dcb->sync_period;
2883 i->sync_offset = dcb->sync_offset;
2884 i->sync_mode = dcb->sync_mode;
2885 i->min_nego_period = dcb->min_nego_period;
2886 }
2887 }
2888
2889
2890 static void disconnect(struct AdapterCtlBlk *acb)
2891 {
2892 struct DeviceCtlBlk *dcb = acb->active_dcb;
2893 struct ScsiReqBlk *srb;
2894
2895 if (!dcb) {
2896 dprintkl(KERN_ERR, "disconnect: No such device\n");
2897 udelay(500);
2898 /* Suspend queue for a while */
2899 acb->last_reset =
2900 jiffies + HZ / 2 +
2901 HZ * acb->eeprom.delay_time;
2902 clear_fifo(acb, "disconnectEx");
2903 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2904 return;
2905 }
2906 srb = dcb->active_srb;
2907 acb->active_dcb = NULL;
2908 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
2909
2910 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
2911 clear_fifo(acb, "disconnect");
2912 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2913 if (srb->state & SRB_UNEXPECT_RESEL) {
2914 dprintkl(KERN_ERR,
2915 "disconnect: Unexpected reselection <%02i-%i>\n",
2916 dcb->target_id, dcb->target_lun);
2917 srb->state = 0;
2918 waiting_process_next(acb);
2919 } else if (srb->state & SRB_ABORT_SENT) {
2920 dcb->flag &= ~ABORT_DEV_;
2921 acb->last_reset = jiffies + HZ / 2 + 1;
2922 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
2923 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
2924 waiting_process_next(acb);
2925 } else {
2926 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
2927 || !(srb->
2928 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
2929 /*
2930 * Selection time out
2931 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
2932 */
2933 /* Unexp. Disc / Sel Timeout */
2934 if (srb->state != SRB_START_
2935 && srb->state != SRB_MSGOUT) {
2936 srb->state = SRB_READY;
2937 dprintkl(KERN_DEBUG,
2938 "disconnect: (0x%p) Unexpected\n",
2939 srb->cmd);
2940 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
2941 goto disc1;
2942 } else {
2943 /* Normal selection timeout */
2944 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
2945 "<%02i-%i> SelTO\n", srb->cmd,
2946 dcb->target_id, dcb->target_lun);
2947 if (srb->retry_count++ > DC395x_MAX_RETRIES
2948 || acb->scan_devices) {
2949 srb->target_status =
2950 SCSI_STAT_SEL_TIMEOUT;
2951 goto disc1;
2952 }
2953 free_tag(dcb, srb);
2954 list_move(&srb->list, &dcb->srb_waiting_list);
2955 dprintkdbg(DBG_KG,
2956 "disconnect: (0x%p) Retry\n",
2957 srb->cmd);
2958 waiting_set_timer(acb, HZ / 20);
2959 }
2960 } else if (srb->state & SRB_DISCONNECT) {
2961 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
2962 /*
2963 * SRB_DISCONNECT (This is what we expect!)
2964 */
2965 if (bval & 0x40) {
2966 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
2967 " 0x%02x: ACK set! Other controllers?\n",
2968 bval);
2969 /* It could come from another initiator, therefore don't do much ! */
2970 } else
2971 waiting_process_next(acb);
2972 } else if (srb->state & SRB_COMPLETED) {
2973 disc1:
2974 /*
2975 ** SRB_COMPLETED
2976 */
2977 free_tag(dcb, srb);
2978 dcb->active_srb = NULL;
2979 srb->state = SRB_FREE;
2980 srb_done(acb, dcb, srb);
2981 }
2982 }
2983 }
2984
2985
2986 static void reselect(struct AdapterCtlBlk *acb)
2987 {
2988 struct DeviceCtlBlk *dcb = acb->active_dcb;
2989 struct ScsiReqBlk *srb = NULL;
2990 u16 rsel_tar_lun_id;
2991 u8 id, lun;
2992 u8 arblostflag = 0;
2993 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
2994
2995 clear_fifo(acb, "reselect");
2996 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
2997 /* Read Reselected Target ID and LUN */
2998 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
2999 if (dcb) { /* Arbitration lost but Reselection win */
3000 srb = dcb->active_srb;
3001 if (!srb) {
3002 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3003 "but active_srb == NULL\n");
3004 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3005 return;
3006 }
3007 /* Why the if ? */
3008 if (!acb->scan_devices) {
3009 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3010 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3011 srb->cmd, dcb->target_id,
3012 dcb->target_lun, rsel_tar_lun_id,
3013 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3014 arblostflag = 1;
3015 /*srb->state |= SRB_DISCONNECT; */
3016
3017 srb->state = SRB_READY;
3018 free_tag(dcb, srb);
3019 list_move(&srb->list, &dcb->srb_waiting_list);
3020 waiting_set_timer(acb, HZ / 20);
3021
3022 /* return; */
3023 }
3024 }
3025 /* Read Reselected Target Id and LUN */
3026 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3027 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3028 "Got %i!\n", rsel_tar_lun_id);
3029 id = rsel_tar_lun_id & 0xff;
3030 lun = (rsel_tar_lun_id >> 8) & 7;
3031 dcb = find_dcb(acb, id, lun);
3032 if (!dcb) {
3033 dprintkl(KERN_ERR, "reselect: From non existent device "
3034 "<%02i-%i>\n", id, lun);
3035 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3036 return;
3037 }
3038 acb->active_dcb = dcb;
3039
3040 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3041 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3042 "disconnection? <%02i-%i>\n",
3043 dcb->target_id, dcb->target_lun);
3044
3045 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3046 srb = acb->tmp_srb;
3047 dcb->active_srb = srb;
3048 } else {
3049 /* There can be only one! */
3050 srb = dcb->active_srb;
3051 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3052 /*
3053 * abort command
3054 */
3055 dprintkl(KERN_DEBUG,
3056 "reselect: w/o disconnected cmds <%02i-%i>\n",
3057 dcb->target_id, dcb->target_lun);
3058 srb = acb->tmp_srb;
3059 srb->state = SRB_UNEXPECT_RESEL;
3060 dcb->active_srb = srb;
3061 enable_msgout_abort(acb, srb);
3062 } else {
3063 if (dcb->flag & ABORT_DEV_) {
3064 /*srb->state = SRB_ABORT_SENT; */
3065 enable_msgout_abort(acb, srb);
3066 } else
3067 srb->state = SRB_DATA_XFER;
3068
3069 }
3070 }
3071 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3072
3073 /* Program HA ID, target ID, period and offset */
3074 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3075 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3076 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3077 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3078 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3079 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3080 /* SCSI command */
3081 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3082 }
3083
3084
3085 static inline u8 tagq_blacklist(char *name)
3086 {
3087 #ifndef DC395x_NO_TAGQ
3088 #if 0
3089 u8 i;
3090 for (i = 0; i < BADDEVCNT; i++)
3091 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3092 return 1;
3093 #endif
3094 return 0;
3095 #else
3096 return 1;
3097 #endif
3098 }
3099
3100
3101 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3102 {
3103 /* Check for SCSI format (ANSI and Response data format) */
3104 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3105 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3106 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3107 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3108 /* ((dcb->dev_type == TYPE_DISK)
3109 || (dcb->dev_type == TYPE_MOD)) && */
3110 !tagq_blacklist(((char *)ptr) + 8)) {
3111 if (dcb->max_command == 1)
3112 dcb->max_command =
3113 dcb->acb->tag_max_num;
3114 dcb->sync_mode |= EN_TAG_QUEUEING;
3115 /*dcb->tag_mask = 0; */
3116 } else
3117 dcb->max_command = 1;
3118 }
3119 }
3120
3121
3122 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3123 struct ScsiInqData *ptr)
3124 {
3125 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3126 dcb->dev_type = bval1;
3127 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3128 disc_tagq_set(dcb, ptr);
3129 }
3130
3131
3132 /* unmap mapped pci regions from SRB */
3133 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3134 {
3135 struct scsi_cmnd *cmd = srb->cmd;
3136 enum dma_data_direction dir = cmd->sc_data_direction;
3137
3138 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3139 /* unmap DC395x SG list */
3140 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3141 srb->sg_bus_addr, SEGMENTX_LEN);
3142 dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN,
3143 DMA_TO_DEVICE);
3144 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3145 scsi_sg_count(cmd), scsi_bufflen(cmd));
3146 /* unmap the sg segments */
3147 scsi_dma_unmap(cmd);
3148 }
3149 }
3150
3151
3152 /* unmap mapped pci sense buffer from SRB */
3153 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3154 struct ScsiReqBlk *srb)
3155 {
3156 if (!(srb->flag & AUTO_REQSENSE))
3157 return;
3158 /* Unmap sense buffer */
3159 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3160 srb->segment_x[0].address);
3161 dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address,
3162 srb->segment_x[0].length, DMA_FROM_DEVICE);
3163 /* Restore SG stuff */
3164 srb->total_xfer_length = srb->xferred;
3165 srb->segment_x[0].address =
3166 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3167 srb->segment_x[0].length =
3168 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3169 }
3170
3171
3172 /*
3173 * Complete execution of a SCSI command
3174 * Signal completion to the generic SCSI driver
3175 */
3176 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3177 struct ScsiReqBlk *srb)
3178 {
3179 u8 tempcnt, status;
3180 struct scsi_cmnd *cmd = srb->cmd;
3181 enum dma_data_direction dir = cmd->sc_data_direction;
3182 int ckc_only = 1;
3183
3184 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3185 srb->cmd->device->id, (u8)srb->cmd->device->lun);
3186 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3187 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3188 scsi_sgtalbe(cmd));
3189 status = srb->target_status;
3190 if (srb->flag & AUTO_REQSENSE) {
3191 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3192 pci_unmap_srb_sense(acb, srb);
3193 /*
3194 ** target status..........................
3195 */
3196 srb->flag &= ~AUTO_REQSENSE;
3197 srb->adapter_status = 0;
3198 srb->target_status = CHECK_CONDITION << 1;
3199 if (debug_enabled(DBG_1)) {
3200 switch (cmd->sense_buffer[2] & 0x0f) {
3201 case NOT_READY:
3202 dprintkl(KERN_DEBUG,
3203 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3204 cmd->cmnd[0], dcb->target_id,
3205 dcb->target_lun, status, acb->scan_devices);
3206 break;
3207 case UNIT_ATTENTION:
3208 dprintkl(KERN_DEBUG,
3209 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3210 cmd->cmnd[0], dcb->target_id,
3211 dcb->target_lun, status, acb->scan_devices);
3212 break;
3213 case ILLEGAL_REQUEST:
3214 dprintkl(KERN_DEBUG,
3215 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3216 cmd->cmnd[0], dcb->target_id,
3217 dcb->target_lun, status, acb->scan_devices);
3218 break;
3219 case MEDIUM_ERROR:
3220 dprintkl(KERN_DEBUG,
3221 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3222 cmd->cmnd[0], dcb->target_id,
3223 dcb->target_lun, status, acb->scan_devices);
3224 break;
3225 case HARDWARE_ERROR:
3226 dprintkl(KERN_DEBUG,
3227 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3228 cmd->cmnd[0], dcb->target_id,
3229 dcb->target_lun, status, acb->scan_devices);
3230 break;
3231 }
3232 if (cmd->sense_buffer[7] >= 6)
3233 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3234 "(0x%08x 0x%08x)\n",
3235 cmd->sense_buffer[2], cmd->sense_buffer[12],
3236 cmd->sense_buffer[13],
3237 *((unsigned int *)(cmd->sense_buffer + 3)),
3238 *((unsigned int *)(cmd->sense_buffer + 8)));
3239 else
3240 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3241 cmd->sense_buffer[2],
3242 *((unsigned int *)(cmd->sense_buffer + 3)));
3243 }
3244
3245 if (status == (CHECK_CONDITION << 1)) {
3246 cmd->result = DID_BAD_TARGET << 16;
3247 goto ckc_e;
3248 }
3249 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3250
3251 if (srb->total_xfer_length
3252 && srb->total_xfer_length >= cmd->underflow)
3253 cmd->result =
3254 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3255 srb->end_message, CHECK_CONDITION);
3256 /*SET_RES_DID(cmd->result,DID_OK) */
3257 else
3258 cmd->result =
3259 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3260 srb->end_message, CHECK_CONDITION);
3261
3262 goto ckc_e;
3263 }
3264
3265 /*************************************************************/
3266 if (status) {
3267 /*
3268 * target status..........................
3269 */
3270 if (status_byte(status) == CHECK_CONDITION) {
3271 request_sense(acb, dcb, srb);
3272 return;
3273 } else if (status_byte(status) == QUEUE_FULL) {
3274 tempcnt = (u8)list_size(&dcb->srb_going_list);
3275 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3276 dcb->target_id, dcb->target_lun, tempcnt);
3277 if (tempcnt > 1)
3278 tempcnt--;
3279 dcb->max_command = tempcnt;
3280 free_tag(dcb, srb);
3281 list_move(&srb->list, &dcb->srb_waiting_list);
3282 waiting_set_timer(acb, HZ / 20);
3283 srb->adapter_status = 0;
3284 srb->target_status = 0;
3285 return;
3286 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3287 srb->adapter_status = H_SEL_TIMEOUT;
3288 srb->target_status = 0;
3289 cmd->result = DID_NO_CONNECT << 16;
3290 } else {
3291 srb->adapter_status = 0;
3292 SET_RES_DID(cmd->result, DID_ERROR);
3293 SET_RES_MSG(cmd->result, srb->end_message);
3294 SET_RES_TARGET(cmd->result, status);
3295
3296 }
3297 } else {
3298 /*
3299 ** process initiator status..........................
3300 */
3301 status = srb->adapter_status;
3302 if (status & H_OVER_UNDER_RUN) {
3303 srb->target_status = 0;
3304 SET_RES_DID(cmd->result, DID_OK);
3305 SET_RES_MSG(cmd->result, srb->end_message);
3306 } else if (srb->status & PARITY_ERROR) {
3307 SET_RES_DID(cmd->result, DID_PARITY);
3308 SET_RES_MSG(cmd->result, srb->end_message);
3309 } else { /* No error */
3310
3311 srb->adapter_status = 0;
3312 srb->target_status = 0;
3313 SET_RES_DID(cmd->result, DID_OK);
3314 }
3315 }
3316
3317 ckc_only = 0;
3318 /* Check Error Conditions */
3319 ckc_e:
3320
3321 pci_unmap_srb(acb, srb);
3322
3323 if (cmd->cmnd[0] == INQUIRY) {
3324 unsigned char *base = NULL;
3325 struct ScsiInqData *ptr;
3326 unsigned long flags = 0;
3327 struct scatterlist* sg = scsi_sglist(cmd);
3328 size_t offset = 0, len = sizeof(struct ScsiInqData);
3329
3330 local_irq_save(flags);
3331 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3332 ptr = (struct ScsiInqData *)(base + offset);
3333
3334 if (!ckc_only && (cmd->result & RES_DID) == 0
3335 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3336 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3337 dcb->inquiry7 = ptr->Flags;
3338
3339 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3340 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3341 if ((cmd->result == (DID_OK << 16) ||
3342 status_byte(cmd->result) == CHECK_CONDITION)) {
3343 if (!dcb->init_tcq_flag) {
3344 add_dev(acb, dcb, ptr);
3345 dcb->init_tcq_flag = 1;
3346 }
3347 }
3348
3349 scsi_kunmap_atomic_sg(base);
3350 local_irq_restore(flags);
3351 }
3352
3353 /* Here is the info for Doug Gilbert's sg3 ... */
3354 scsi_set_resid(cmd, srb->total_xfer_length);
3355 /* This may be interpreted by sb. or not ... */
3356 cmd->SCp.this_residual = srb->total_xfer_length;
3357 cmd->SCp.buffers_residual = 0;
3358 if (debug_enabled(DBG_KG)) {
3359 if (srb->total_xfer_length)
3360 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3361 "cmnd=0x%02x Missed %i bytes\n",
3362 cmd, cmd->device->id, (u8)cmd->device->lun,
3363 cmd->cmnd[0], srb->total_xfer_length);
3364 }
3365
3366 if (srb != acb->tmp_srb) {
3367 /* Add to free list */
3368 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3369 cmd, cmd->result);
3370 list_move_tail(&srb->list, &acb->srb_free_list);
3371 } else {
3372 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3373 }
3374
3375 cmd->scsi_done(cmd);
3376 waiting_process_next(acb);
3377 }
3378
3379
3380 /* abort all cmds in our queues */
3381 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3382 struct scsi_cmnd *cmd, u8 force)
3383 {
3384 struct DeviceCtlBlk *dcb;
3385 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3386
3387 list_for_each_entry(dcb, &acb->dcb_list, list) {
3388 struct ScsiReqBlk *srb;
3389 struct ScsiReqBlk *tmp;
3390 struct scsi_cmnd *p;
3391
3392 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3393 enum dma_data_direction dir;
3394 int result;
3395
3396 p = srb->cmd;
3397 dir = p->sc_data_direction;
3398 result = MK_RES(0, did_flag, 0, 0);
3399 printk("G:%p(%02i-%i) ", p,
3400 p->device->id, (u8)p->device->lun);
3401 list_del(&srb->list);
3402 free_tag(dcb, srb);
3403 list_add_tail(&srb->list, &acb->srb_free_list);
3404 p->result = result;
3405 pci_unmap_srb_sense(acb, srb);
3406 pci_unmap_srb(acb, srb);
3407 if (force) {
3408 /* For new EH, we normally don't need to give commands back,
3409 * as they all complete or all time out */
3410 p->scsi_done(p);
3411 }
3412 }
3413 if (!list_empty(&dcb->srb_going_list))
3414 dprintkl(KERN_DEBUG,
3415 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3416 dcb->target_id, dcb->target_lun);
3417 if (dcb->tag_mask)
3418 dprintkl(KERN_DEBUG,
3419 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3420 dcb->target_id, dcb->target_lun,
3421 dcb->tag_mask);
3422
3423 /* Waiting queue */
3424 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3425 int result;
3426 p = srb->cmd;
3427
3428 result = MK_RES(0, did_flag, 0, 0);
3429 printk("W:%p<%02i-%i>", p, p->device->id,
3430 (u8)p->device->lun);
3431 list_move_tail(&srb->list, &acb->srb_free_list);
3432 p->result = result;
3433 pci_unmap_srb_sense(acb, srb);
3434 pci_unmap_srb(acb, srb);
3435 if (force) {
3436 /* For new EH, we normally don't need to give commands back,
3437 * as they all complete or all time out */
3438 cmd->scsi_done(cmd);
3439 }
3440 }
3441 if (!list_empty(&dcb->srb_waiting_list))
3442 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3443 list_size(&dcb->srb_waiting_list), dcb->target_id,
3444 dcb->target_lun);
3445 dcb->flag &= ~ABORT_DEV_;
3446 }
3447 printk("\n");
3448 }
3449
3450
3451 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3452 {
3453 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3454 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3455 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3456
3457 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3458 /* nothing */;
3459 }
3460
3461
3462 static void set_basic_config(struct AdapterCtlBlk *acb)
3463 {
3464 u8 bval;
3465 u16 wval;
3466 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3467 if (acb->config & HCC_PARITY)
3468 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3469 else
3470 bval = PHASELATCH | INITIATOR | BLOCKRST;
3471
3472 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3473
3474 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3475 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3476 /* program Host ID */
3477 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3478 /* set ansynchronous transfer */
3479 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3480 /* Turn LED control off */
3481 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3482 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3483 /* DMA config */
3484 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3485 wval |=
3486 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3487 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3488 /* Clear pending interrupt status */
3489 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3490 /* Enable SCSI interrupt */
3491 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3492 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3493 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3494 );
3495 }
3496
3497
3498 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3499 {
3500 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3501 /* delay half a second */
3502 if (timer_pending(&acb->waiting_timer))
3503 del_timer(&acb->waiting_timer);
3504
3505 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3506 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3507 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3508 udelay(500);
3509 /* Maybe we locked up the bus? Then lets wait even longer ... */
3510 acb->last_reset =
3511 jiffies + 5 * HZ / 2 +
3512 HZ * acb->eeprom.delay_time;
3513
3514 clear_fifo(acb, "scsi_reset_detect");
3515 set_basic_config(acb);
3516 /*1.25 */
3517 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3518
3519 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3520 acb->acb_flag |= RESET_DONE;
3521 } else {
3522 acb->acb_flag |= RESET_DETECT;
3523 reset_dev_param(acb);
3524 doing_srb_done(acb, DID_RESET, NULL, 1);
3525 /*DC395x_RecoverSRB( acb ); */
3526 acb->active_dcb = NULL;
3527 acb->acb_flag = 0;
3528 waiting_process_next(acb);
3529 }
3530 }
3531
3532
3533 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3534 struct ScsiReqBlk *srb)
3535 {
3536 struct scsi_cmnd *cmd = srb->cmd;
3537 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3538 cmd, cmd->device->id, (u8)cmd->device->lun);
3539
3540 srb->flag |= AUTO_REQSENSE;
3541 srb->adapter_status = 0;
3542 srb->target_status = 0;
3543
3544 /* KG: Can this prevent crap sense data ? */
3545 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3546
3547 /* Save some data */
3548 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3549 srb->segment_x[0].address;
3550 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3551 srb->segment_x[0].length;
3552 srb->xferred = srb->total_xfer_length;
3553 /* srb->segment_x : a one entry of S/G list table */
3554 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3555 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3556 /* Map sense buffer */
3557 srb->segment_x[0].address = dma_map_single(&acb->dev->dev,
3558 cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
3559 DMA_FROM_DEVICE);
3560 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3561 cmd->sense_buffer, srb->segment_x[0].address,
3562 SCSI_SENSE_BUFFERSIZE);
3563 srb->sg_count = 1;
3564 srb->sg_index = 0;
3565
3566 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3567 dprintkl(KERN_DEBUG,
3568 "request_sense: (0x%p) failed <%02i-%i>\n",
3569 srb->cmd, dcb->target_id, dcb->target_lun);
3570 list_move(&srb->list, &dcb->srb_waiting_list);
3571 waiting_set_timer(acb, HZ / 100);
3572 }
3573 }
3574
3575
3576 /**
3577 * device_alloc - Allocate a new device instance. This create the
3578 * devices instance and sets up all the data items. The adapter
3579 * instance is required to obtain confiuration information for this
3580 * device. This does *not* add this device to the adapters device
3581 * list.
3582 *
3583 * @acb: The adapter to obtain configuration information from.
3584 * @target: The target for the new device.
3585 * @lun: The lun for the new device.
3586 *
3587 * Return the new device if successful or NULL on failure.
3588 **/
3589 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3590 u8 target, u8 lun)
3591 {
3592 struct NvRamType *eeprom = &acb->eeprom;
3593 u8 period_index = eeprom->target[target].period & 0x07;
3594 struct DeviceCtlBlk *dcb;
3595
3596 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3597 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3598 if (!dcb)
3599 return NULL;
3600 dcb->acb = NULL;
3601 INIT_LIST_HEAD(&dcb->srb_going_list);
3602 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3603 dcb->active_srb = NULL;
3604 dcb->tag_mask = 0;
3605 dcb->max_command = 1;
3606 dcb->target_id = target;
3607 dcb->target_lun = lun;
3608 dcb->dev_mode = eeprom->target[target].cfg0;
3609 #ifndef DC395x_NO_DISCONNECT
3610 dcb->identify_msg =
3611 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3612 #else
3613 dcb->identify_msg = IDENTIFY(0, lun);
3614 #endif
3615 dcb->inquiry7 = 0;
3616 dcb->sync_mode = 0;
3617 dcb->min_nego_period = clock_period[period_index];
3618 dcb->sync_period = 0;
3619 dcb->sync_offset = 0;
3620 dcb->flag = 0;
3621
3622 #ifndef DC395x_NO_WIDE
3623 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3624 && (acb->config & HCC_WIDE_CARD))
3625 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3626 #endif
3627 #ifndef DC395x_NO_SYNC
3628 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3629 if (!(lun) || current_sync_offset)
3630 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3631 #endif
3632 if (dcb->target_lun != 0) {
3633 /* Copy settings */
3634 struct DeviceCtlBlk *p;
3635 list_for_each_entry(p, &acb->dcb_list, list)
3636 if (p->target_id == dcb->target_id)
3637 break;
3638 dprintkdbg(DBG_1,
3639 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3640 dcb->target_id, dcb->target_lun,
3641 p->target_id, p->target_lun);
3642 dcb->sync_mode = p->sync_mode;
3643 dcb->sync_period = p->sync_period;
3644 dcb->min_nego_period = p->min_nego_period;
3645 dcb->sync_offset = p->sync_offset;
3646 dcb->inquiry7 = p->inquiry7;
3647 }
3648 return dcb;
3649 }
3650
3651
3652 /**
3653 * adapter_add_device - Adds the device instance to the adaptor instance.
3654 *
3655 * @acb: The adapter device to be updated
3656 * @dcb: A newly created and initialised device instance to add.
3657 **/
3658 static void adapter_add_device(struct AdapterCtlBlk *acb,
3659 struct DeviceCtlBlk *dcb)
3660 {
3661 /* backpointer to adapter */
3662 dcb->acb = acb;
3663
3664 /* set run_robin to this device if it is currently empty */
3665 if (list_empty(&acb->dcb_list))
3666 acb->dcb_run_robin = dcb;
3667
3668 /* add device to list */
3669 list_add_tail(&dcb->list, &acb->dcb_list);
3670
3671 /* update device maps */
3672 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3673 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3674 }
3675
3676
3677 /**
3678 * adapter_remove_device - Removes the device instance from the adaptor
3679 * instance. The device instance is not check in any way or freed by this.
3680 * The caller is expected to take care of that. This will simply remove the
3681 * device from the adapters data strcutures.
3682 *
3683 * @acb: The adapter device to be updated
3684 * @dcb: A device that has previously been added to the adapter.
3685 **/
3686 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3687 struct DeviceCtlBlk *dcb)
3688 {
3689 struct DeviceCtlBlk *i;
3690 struct DeviceCtlBlk *tmp;
3691 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3692 dcb->target_id, dcb->target_lun);
3693
3694 /* fix up any pointers to this device that we have in the adapter */
3695 if (acb->active_dcb == dcb)
3696 acb->active_dcb = NULL;
3697 if (acb->dcb_run_robin == dcb)
3698 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3699
3700 /* unlink from list */
3701 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3702 if (dcb == i) {
3703 list_del(&i->list);
3704 break;
3705 }
3706
3707 /* clear map and children */
3708 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3709 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3710 dcb->acb = NULL;
3711 }
3712
3713
3714 /**
3715 * adapter_remove_and_free_device - Removes a single device from the adapter
3716 * and then frees the device information.
3717 *
3718 * @acb: The adapter device to be updated
3719 * @dcb: A device that has previously been added to the adapter.
3720 */
3721 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3722 struct DeviceCtlBlk *dcb)
3723 {
3724 if (list_size(&dcb->srb_going_list) > 1) {
3725 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3726 "Won't remove because of %i active requests.\n",
3727 dcb->target_id, dcb->target_lun,
3728 list_size(&dcb->srb_going_list));
3729 return;
3730 }
3731 adapter_remove_device(acb, dcb);
3732 kfree(dcb);
3733 }
3734
3735
3736 /**
3737 * adapter_remove_and_free_all_devices - Removes and frees all of the
3738 * devices associated with the specified adapter.
3739 *
3740 * @acb: The adapter from which all devices should be removed.
3741 **/
3742 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3743 {
3744 struct DeviceCtlBlk *dcb;
3745 struct DeviceCtlBlk *tmp;
3746 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3747 list_size(&acb->dcb_list));
3748
3749 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3750 adapter_remove_and_free_device(acb, dcb);
3751 }
3752
3753
3754 /**
3755 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3756 * scsi device that we need to deal with. We allocate a new device and then
3757 * insert that device into the adapters device list.
3758 *
3759 * @scsi_device: The new scsi device that we need to handle.
3760 **/
3761 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3762 {
3763 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3764 struct DeviceCtlBlk *dcb;
3765
3766 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3767 if (!dcb)
3768 return -ENOMEM;
3769 adapter_add_device(acb, dcb);
3770
3771 return 0;
3772 }
3773
3774
3775 /**
3776 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3777 * device that is going away.
3778 *
3779 * @scsi_device: The new scsi device that we need to handle.
3780 **/
3781 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3782 {
3783 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3784 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3785 if (dcb)
3786 adapter_remove_and_free_device(acb, dcb);
3787 }
3788
3789
3790
3791
3792 /**
3793 * trms1040_wait_30us: wait for 30 us
3794 *
3795 * Waits for 30us (using the chip by the looks of it..)
3796 *
3797 * @io_port: base I/O address
3798 **/
3799 static void trms1040_wait_30us(unsigned long io_port)
3800 {
3801 /* ScsiPortStallExecution(30); wait 30 us */
3802 outb(5, io_port + TRM_S1040_GEN_TIMER);
3803 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3804 /* nothing */ ;
3805 }
3806
3807
3808 /**
3809 * trms1040_write_cmd - write the secified command and address to
3810 * chip
3811 *
3812 * @io_port: base I/O address
3813 * @cmd: SB + op code (command) to send
3814 * @addr: address to send
3815 **/
3816 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3817 {
3818 int i;
3819 u8 send_data;
3820
3821 /* program SB + OP code */
3822 for (i = 0; i < 3; i++, cmd <<= 1) {
3823 send_data = NVR_SELECT;
3824 if (cmd & 0x04) /* Start from bit 2 */
3825 send_data |= NVR_BITOUT;
3826
3827 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3828 trms1040_wait_30us(io_port);
3829 outb((send_data | NVR_CLOCK),
3830 io_port + TRM_S1040_GEN_NVRAM);
3831 trms1040_wait_30us(io_port);
3832 }
3833
3834 /* send address */
3835 for (i = 0; i < 7; i++, addr <<= 1) {
3836 send_data = NVR_SELECT;
3837 if (addr & 0x40) /* Start from bit 6 */
3838 send_data |= NVR_BITOUT;
3839
3840 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3841 trms1040_wait_30us(io_port);
3842 outb((send_data | NVR_CLOCK),
3843 io_port + TRM_S1040_GEN_NVRAM);
3844 trms1040_wait_30us(io_port);
3845 }
3846 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3847 trms1040_wait_30us(io_port);
3848 }
3849
3850
3851 /**
3852 * trms1040_set_data - store a single byte in the eeprom
3853 *
3854 * Called from write all to write a single byte into the SSEEPROM
3855 * Which is done one bit at a time.
3856 *
3857 * @io_port: base I/O address
3858 * @addr: offset into EEPROM
3859 * @byte: bytes to write
3860 **/
3861 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
3862 {
3863 int i;
3864 u8 send_data;
3865
3866 /* Send write command & address */
3867 trms1040_write_cmd(io_port, 0x05, addr);
3868
3869 /* Write data */
3870 for (i = 0; i < 8; i++, byte <<= 1) {
3871 send_data = NVR_SELECT;
3872 if (byte & 0x80) /* Start from bit 7 */
3873 send_data |= NVR_BITOUT;
3874
3875 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3876 trms1040_wait_30us(io_port);
3877 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3878 trms1040_wait_30us(io_port);
3879 }
3880 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3881 trms1040_wait_30us(io_port);
3882
3883 /* Disable chip select */
3884 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3885 trms1040_wait_30us(io_port);
3886
3887 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3888 trms1040_wait_30us(io_port);
3889
3890 /* Wait for write ready */
3891 while (1) {
3892 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3893 trms1040_wait_30us(io_port);
3894
3895 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3896 trms1040_wait_30us(io_port);
3897
3898 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
3899 break;
3900 }
3901
3902 /* Disable chip select */
3903 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3904 }
3905
3906
3907 /**
3908 * trms1040_write_all - write 128 bytes to the eeprom
3909 *
3910 * Write the supplied 128 bytes to the chips SEEPROM
3911 *
3912 * @eeprom: the data to write
3913 * @io_port: the base io port
3914 **/
3915 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
3916 {
3917 u8 *b_eeprom = (u8 *)eeprom;
3918 u8 addr;
3919
3920 /* Enable SEEPROM */
3921 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3922 io_port + TRM_S1040_GEN_CONTROL);
3923
3924 /* write enable */
3925 trms1040_write_cmd(io_port, 0x04, 0xFF);
3926 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3927 trms1040_wait_30us(io_port);
3928
3929 /* write */
3930 for (addr = 0; addr < 128; addr++, b_eeprom++)
3931 trms1040_set_data(io_port, addr, *b_eeprom);
3932
3933 /* write disable */
3934 trms1040_write_cmd(io_port, 0x04, 0x00);
3935 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3936 trms1040_wait_30us(io_port);
3937
3938 /* Disable SEEPROM */
3939 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3940 io_port + TRM_S1040_GEN_CONTROL);
3941 }
3942
3943
3944 /**
3945 * trms1040_get_data - get a single byte from the eeprom
3946 *
3947 * Called from read all to read a single byte into the SSEEPROM
3948 * Which is done one bit at a time.
3949 *
3950 * @io_port: base I/O address
3951 * @addr: offset into SEEPROM
3952 *
3953 * Returns the byte read.
3954 **/
3955 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
3956 {
3957 int i;
3958 u8 read_byte;
3959 u8 result = 0;
3960
3961 /* Send read command & address */
3962 trms1040_write_cmd(io_port, 0x06, addr);
3963
3964 /* read data */
3965 for (i = 0; i < 8; i++) {
3966 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3967 trms1040_wait_30us(io_port);
3968 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3969
3970 /* Get data bit while falling edge */
3971 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
3972 result <<= 1;
3973 if (read_byte & NVR_BITIN)
3974 result |= 1;
3975
3976 trms1040_wait_30us(io_port);
3977 }
3978
3979 /* Disable chip select */
3980 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3981 return result;
3982 }
3983
3984
3985 /**
3986 * trms1040_read_all - read all bytes from the eeprom
3987 *
3988 * Read the 128 bytes from the SEEPROM.
3989 *
3990 * @eeprom: where to store the data
3991 * @io_port: the base io port
3992 **/
3993 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
3994 {
3995 u8 *b_eeprom = (u8 *)eeprom;
3996 u8 addr;
3997
3998 /* Enable SEEPROM */
3999 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4000 io_port + TRM_S1040_GEN_CONTROL);
4001
4002 /* read details */
4003 for (addr = 0; addr < 128; addr++, b_eeprom++)
4004 *b_eeprom = trms1040_get_data(io_port, addr);
4005
4006 /* Disable SEEPROM */
4007 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4008 io_port + TRM_S1040_GEN_CONTROL);
4009 }
4010
4011
4012
4013 /**
4014 * check_eeprom - get and check contents of the eeprom
4015 *
4016 * Read seeprom 128 bytes into the memory provider in eeprom.
4017 * Checks the checksum and if it's not correct it uses a set of default
4018 * values.
4019 *
4020 * @eeprom: caller allocated strcuture to read the eeprom data into
4021 * @io_port: io port to read from
4022 **/
4023 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4024 {
4025 u16 *w_eeprom = (u16 *)eeprom;
4026 u16 w_addr;
4027 u16 cksum;
4028 u32 d_addr;
4029 u32 *d_eeprom;
4030
4031 trms1040_read_all(eeprom, io_port); /* read eeprom */
4032
4033 cksum = 0;
4034 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4035 w_addr++, w_eeprom++)
4036 cksum += *w_eeprom;
4037 if (cksum != 0x1234) {
4038 /*
4039 * Checksum is wrong.
4040 * Load a set of defaults into the eeprom buffer
4041 */
4042 dprintkl(KERN_WARNING,
4043 "EEProm checksum error: using default values and options.\n");
4044 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4045 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4046 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4047 eeprom->sub_sys_id[1] =
4048 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4049 eeprom->sub_class = 0x00;
4050 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4051 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4052 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4053 eeprom->device_id[1] =
4054 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4055 eeprom->reserved = 0x00;
4056
4057 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4058 d_addr < 16; d_addr++, d_eeprom++)
4059 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4060
4061 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4062 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4063 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4064 *d_eeprom = 0x00;
4065
4066 /* Now load defaults (maybe set by boot/module params) */
4067 set_safe_settings();
4068 fix_settings();
4069 eeprom_override(eeprom);
4070
4071 eeprom->cksum = 0x00;
4072 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4073 w_addr < 63; w_addr++, w_eeprom++)
4074 cksum += *w_eeprom;
4075
4076 *w_eeprom = 0x1234 - cksum;
4077 trms1040_write_all(eeprom, io_port);
4078 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4079 } else {
4080 set_safe_settings();
4081 eeprom_index_to_delay(eeprom);
4082 eeprom_override(eeprom);
4083 }
4084 }
4085
4086
4087 /**
4088 * print_eeprom_settings - output the eeprom settings
4089 * to the kernel log so people can see what they were.
4090 *
4091 * @eeprom: The eeprom data strucutre to show details for.
4092 **/
4093 static void print_eeprom_settings(struct NvRamType *eeprom)
4094 {
4095 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4096 eeprom->scsi_id,
4097 eeprom->target[0].period,
4098 clock_speed[eeprom->target[0].period] / 10,
4099 clock_speed[eeprom->target[0].period] % 10,
4100 eeprom->target[0].cfg0);
4101 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4102 eeprom->channel_cfg, eeprom->max_tag,
4103 1 << eeprom->max_tag, eeprom->delay_time);
4104 }
4105
4106
4107 /* Free SG tables */
4108 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4109 {
4110 int i;
4111 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4112
4113 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4114 kfree(acb->srb_array[i].segment_x);
4115 }
4116
4117
4118 /*
4119 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4120 * should never cross a page boundary */
4121 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4122 {
4123 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4124 *SEGMENTX_LEN;
4125 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4126 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4127 int srb_idx = 0;
4128 unsigned i = 0;
4129 struct SGentry *uninitialized_var(ptr);
4130
4131 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4132 acb->srb_array[i].segment_x = NULL;
4133
4134 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4135 while (pages--) {
4136 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4137 if (!ptr) {
4138 adapter_sg_tables_free(acb);
4139 return 1;
4140 }
4141 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4142 PAGE_SIZE, ptr, srb_idx);
4143 i = 0;
4144 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4145 acb->srb_array[srb_idx++].segment_x =
4146 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4147 }
4148 if (i < srbs_per_page)
4149 acb->srb.segment_x =
4150 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4151 else
4152 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4153 return 0;
4154 }
4155
4156
4157
4158 /**
4159 * adapter_print_config - print adapter connection and termination
4160 * config
4161 *
4162 * The io port in the adapter needs to have been set before calling
4163 * this function.
4164 *
4165 * @acb: The adapter to print the information for.
4166 **/
4167 static void adapter_print_config(struct AdapterCtlBlk *acb)
4168 {
4169 u8 bval;
4170
4171 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4172 dprintkl(KERN_INFO, "%sConnectors: ",
4173 ((bval & WIDESCSI) ? "(Wide) " : ""));
4174 if (!(bval & CON5068))
4175 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4176 if (!(bval & CON68))
4177 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4178 if (!(bval & CON50))
4179 printk("int50 ");
4180 if ((bval & (CON5068 | CON50 | CON68)) ==
4181 0 /*(CON5068 | CON50 | CON68) */ )
4182 printk(" Oops! (All 3?) ");
4183 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4184 printk(" Termination: ");
4185 if (bval & DIS_TERM)
4186 printk("Disabled\n");
4187 else {
4188 if (bval & AUTOTERM)
4189 printk("Auto ");
4190 if (bval & LOW8TERM)
4191 printk("Low ");
4192 if (bval & UP8TERM)
4193 printk("High ");
4194 printk("\n");
4195 }
4196 }
4197
4198
4199 /**
4200 * adapter_init_params - Initialize the various parameters in the
4201 * adapter structure. Note that the pointer to the scsi_host is set
4202 * early (when this instance is created) and the io_port and irq
4203 * values are set later after they have been reserved. This just gets
4204 * everything set to a good starting position.
4205 *
4206 * The eeprom structure in the adapter needs to have been set before
4207 * calling this function.
4208 *
4209 * @acb: The adapter to initialize.
4210 **/
4211 static void adapter_init_params(struct AdapterCtlBlk *acb)
4212 {
4213 struct NvRamType *eeprom = &acb->eeprom;
4214 int i;
4215
4216 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4217 /* NOTE: acb->io_port_base is set at port registration time */
4218 /* NOTE: acb->io_port_len is set at port registration time */
4219
4220 INIT_LIST_HEAD(&acb->dcb_list);
4221 acb->dcb_run_robin = NULL;
4222 acb->active_dcb = NULL;
4223
4224 INIT_LIST_HEAD(&acb->srb_free_list);
4225 /* temp SRB for Q tag used or abort command used */
4226 acb->tmp_srb = &acb->srb;
4227 timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4228 timer_setup(&acb->selto_timer, NULL, 0);
4229
4230 acb->srb_count = DC395x_MAX_SRB_CNT;
4231
4232 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4233 /* NOTE: acb->irq_level is set at IRQ registration time */
4234
4235 acb->tag_max_num = 1 << eeprom->max_tag;
4236 if (acb->tag_max_num > 30)
4237 acb->tag_max_num = 30;
4238
4239 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4240 acb->gmode2 = eeprom->channel_cfg;
4241 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4242
4243 if (eeprom->channel_cfg & NAC_SCANLUN)
4244 acb->lun_chk = 1;
4245 acb->scan_devices = 1;
4246
4247 acb->scsi_host->this_id = eeprom->scsi_id;
4248 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4249
4250 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4251 acb->dcb_map[i] = 0;
4252
4253 acb->msg_len = 0;
4254
4255 /* link static array of srbs into the srb free list */
4256 for (i = 0; i < acb->srb_count - 1; i++)
4257 list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list);
4258 }
4259
4260
4261 /**
4262 * adapter_init_host - Initialize the scsi host instance based on
4263 * values that we have already stored in the adapter instance. There's
4264 * some mention that a lot of these are deprecated, so we won't use
4265 * them (we'll use the ones in the adapter instance) but we'll fill
4266 * them in in case something else needs them.
4267 *
4268 * The eeprom structure, irq and io ports in the adapter need to have
4269 * been set before calling this function.
4270 *
4271 * @host: The scsi host instance to fill in the values for.
4272 **/
4273 static void adapter_init_scsi_host(struct Scsi_Host *host)
4274 {
4275 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4276 struct NvRamType *eeprom = &acb->eeprom;
4277
4278 host->max_cmd_len = 24;
4279 host->can_queue = DC395x_MAX_CMD_QUEUE;
4280 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4281 host->this_id = (int)eeprom->scsi_id;
4282 host->io_port = acb->io_port_base;
4283 host->n_io_port = acb->io_port_len;
4284 host->dma_channel = -1;
4285 host->unique_id = acb->io_port_base;
4286 host->irq = acb->irq_level;
4287 acb->last_reset = jiffies;
4288
4289 host->max_id = 16;
4290 if (host->max_id - 1 == eeprom->scsi_id)
4291 host->max_id--;
4292
4293 if (eeprom->channel_cfg & NAC_SCANLUN)
4294 host->max_lun = 8;
4295 else
4296 host->max_lun = 1;
4297 }
4298
4299
4300 /**
4301 * adapter_init_chip - Get the chip into a know state and figure out
4302 * some of the settings that apply to this adapter.
4303 *
4304 * The io port in the adapter needs to have been set before calling
4305 * this function. The config will be configured correctly on return.
4306 *
4307 * @acb: The adapter which we are to init.
4308 **/
4309 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4310 {
4311 struct NvRamType *eeprom = &acb->eeprom;
4312
4313 /* Mask all the interrupt */
4314 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4315 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4316
4317 /* Reset SCSI module */
4318 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4319
4320 /* Reset PCI/DMA module */
4321 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4322 udelay(20);
4323
4324 /* program configuration 0 */
4325 acb->config = HCC_AUTOTERM | HCC_PARITY;
4326 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4327 acb->config |= HCC_WIDE_CARD;
4328
4329 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4330 acb->config |= HCC_SCSI_RESET;
4331
4332 if (acb->config & HCC_SCSI_RESET) {
4333 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4334 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4335
4336 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4337 /*spin_unlock_irq (&io_request_lock); */
4338 udelay(500);
4339
4340 acb->last_reset =
4341 jiffies + HZ / 2 +
4342 HZ * acb->eeprom.delay_time;
4343
4344 /*spin_lock_irq (&io_request_lock); */
4345 }
4346 }
4347
4348
4349 /**
4350 * init_adapter - Grab the resource for the card, setup the adapter
4351 * information, set the card into a known state, create the various
4352 * tables etc etc. This basically gets all adapter information all up
4353 * to date, initialised and gets the chip in sync with it.
4354 *
4355 * @host: This hosts adapter structure
4356 * @io_port: The base I/O port
4357 * @irq: IRQ
4358 *
4359 * Returns 0 if the initialization succeeds, any other value on
4360 * failure.
4361 **/
4362 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4363 u32 io_port_len, unsigned int irq)
4364 {
4365 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4366 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4367 goto failed;
4368 }
4369 /* store port base to indicate we have registered it */
4370 acb->io_port_base = io_port;
4371 acb->io_port_len = io_port_len;
4372
4373 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4374 /* release the region we just claimed */
4375 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4376 goto failed;
4377 }
4378 /* store irq to indicate we have registered it */
4379 acb->irq_level = irq;
4380
4381 /* get eeprom configuration information and command line settings etc */
4382 check_eeprom(&acb->eeprom, io_port);
4383 print_eeprom_settings(&acb->eeprom);
4384
4385 /* setup adapter control block */
4386 adapter_init_params(acb);
4387
4388 /* display card connectors/termination settings */
4389 adapter_print_config(acb);
4390
4391 if (adapter_sg_tables_alloc(acb)) {
4392 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4393 goto failed;
4394 }
4395 adapter_init_scsi_host(acb->scsi_host);
4396 adapter_init_chip(acb);
4397 set_basic_config(acb);
4398
4399 dprintkdbg(DBG_0,
4400 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4401 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4402 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4403 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4404 return 0;
4405
4406 failed:
4407 if (acb->irq_level)
4408 free_irq(acb->irq_level, acb);
4409 if (acb->io_port_base)
4410 release_region(acb->io_port_base, acb->io_port_len);
4411 adapter_sg_tables_free(acb);
4412
4413 return 1;
4414 }
4415
4416
4417 /**
4418 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4419 * stopping all operations and disabling interrupt generation on the
4420 * card.
4421 *
4422 * @acb: The adapter which we are to shutdown.
4423 **/
4424 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4425 {
4426 /* disable interrupts */
4427 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4428 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4429
4430 /* reset the scsi bus */
4431 if (acb->config & HCC_SCSI_RESET)
4432 reset_scsi_bus(acb);
4433
4434 /* clear any pending interrupt state */
4435 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4436 }
4437
4438
4439
4440 /**
4441 * adapter_uninit - Shut down the chip and release any resources that
4442 * we had allocated. Once this returns the adapter should not be used
4443 * anymore.
4444 *
4445 * @acb: The adapter which we are to un-initialize.
4446 **/
4447 static void adapter_uninit(struct AdapterCtlBlk *acb)
4448 {
4449 unsigned long flags;
4450 DC395x_LOCK_IO(acb->scsi_host, flags);
4451
4452 /* remove timers */
4453 if (timer_pending(&acb->waiting_timer))
4454 del_timer(&acb->waiting_timer);
4455 if (timer_pending(&acb->selto_timer))
4456 del_timer(&acb->selto_timer);
4457
4458 adapter_uninit_chip(acb);
4459 adapter_remove_and_free_all_devices(acb);
4460 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4461
4462 if (acb->irq_level)
4463 free_irq(acb->irq_level, acb);
4464 if (acb->io_port_base)
4465 release_region(acb->io_port_base, acb->io_port_len);
4466
4467 adapter_sg_tables_free(acb);
4468 }
4469
4470
4471 #undef YESNO
4472 #define YESNO(YN) \
4473 if (YN) seq_printf(m, " Yes ");\
4474 else seq_printf(m, " No ")
4475
4476 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4477 {
4478 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4479 int spd, spd1;
4480 struct DeviceCtlBlk *dcb;
4481 unsigned long flags;
4482 int dev;
4483
4484 seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4485 " Driver Version " DC395X_VERSION "\n");
4486
4487 DC395x_LOCK_IO(acb->scsi_host, flags);
4488
4489 seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4490 seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4491 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4492 seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4493 seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4494 seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4495
4496 seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4497 seq_printf(m, "AdapterID %i\n", host->this_id);
4498
4499 seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4500 /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4501 seq_printf(m, ", FilterCfg 0x%02x",
4502 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4503 seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4504 /*seq_printf(m, "\n"); */
4505
4506 seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4507 seq_printf(m, "Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4508 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4509 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4510 acb->dcb_map[6], acb->dcb_map[7]);
4511 seq_printf(m, " %02x %02x %02x %02x %02x %02x %02x %02x\n",
4512 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4513 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4514 acb->dcb_map[14], acb->dcb_map[15]);
4515
4516 seq_puts(m,
4517 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4518
4519 dev = 0;
4520 list_for_each_entry(dcb, &acb->dcb_list, list) {
4521 int nego_period;
4522 seq_printf(m, "%02i %02i %02i ", dev, dcb->target_id,
4523 dcb->target_lun);
4524 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4525 YESNO(dcb->sync_offset);
4526 YESNO(dcb->sync_period & WIDE_SYNC);
4527 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4528 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4529 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4530 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4531 if (dcb->sync_offset)
4532 seq_printf(m, " %03i ns ", nego_period);
4533 else
4534 seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4535
4536 if (dcb->sync_offset & 0x0f) {
4537 spd = 1000 / (nego_period);
4538 spd1 = 1000 % (nego_period);
4539 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4540 seq_printf(m, " %2i.%1i M %02i ", spd, spd1,
4541 (dcb->sync_offset & 0x0f));
4542 } else
4543 seq_puts(m, " ");
4544
4545 /* Add more info ... */
4546 seq_printf(m, " %02i\n", dcb->max_command);
4547 dev++;
4548 }
4549
4550 if (timer_pending(&acb->waiting_timer))
4551 seq_puts(m, "Waiting queue timer running\n");
4552 else
4553 seq_putc(m, '\n');
4554
4555 list_for_each_entry(dcb, &acb->dcb_list, list) {
4556 struct ScsiReqBlk *srb;
4557 if (!list_empty(&dcb->srb_waiting_list))
4558 seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4559 dcb->target_id, dcb->target_lun,
4560 list_size(&dcb->srb_waiting_list));
4561 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4562 seq_printf(m, " %p", srb->cmd);
4563 if (!list_empty(&dcb->srb_going_list))
4564 seq_printf(m, "\nDCB (%02i-%i): Going : %i:",
4565 dcb->target_id, dcb->target_lun,
4566 list_size(&dcb->srb_going_list));
4567 list_for_each_entry(srb, &dcb->srb_going_list, list)
4568 seq_printf(m, " %p", srb->cmd);
4569 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4570 seq_putc(m, '\n');
4571 }
4572
4573 if (debug_enabled(DBG_1)) {
4574 seq_printf(m, "DCB list for ACB %p:\n", acb);
4575 list_for_each_entry(dcb, &acb->dcb_list, list) {
4576 seq_printf(m, "%p -> ", dcb);
4577 }
4578 seq_puts(m, "END\n");
4579 }
4580
4581 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4582 return 0;
4583 }
4584
4585
4586 static struct scsi_host_template dc395x_driver_template = {
4587 .module = THIS_MODULE,
4588 .proc_name = DC395X_NAME,
4589 .show_info = dc395x_show_info,
4590 .name = DC395X_BANNER " " DC395X_VERSION,
4591 .queuecommand = dc395x_queue_command,
4592 .slave_alloc = dc395x_slave_alloc,
4593 .slave_destroy = dc395x_slave_destroy,
4594 .can_queue = DC395x_MAX_CAN_QUEUE,
4595 .this_id = 7,
4596 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4597 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4598 .eh_abort_handler = dc395x_eh_abort,
4599 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4600 .dma_boundary = PAGE_SIZE - 1,
4601 };
4602
4603
4604 /**
4605 * banner_display - Display banner on first instance of driver
4606 * initialized.
4607 **/
4608 static void banner_display(void)
4609 {
4610 static int banner_done = 0;
4611 if (!banner_done)
4612 {
4613 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4614 banner_done = 1;
4615 }
4616 }
4617
4618
4619 /**
4620 * dc395x_init_one - Initialise a single instance of the adapter.
4621 *
4622 * The PCI layer will call this once for each instance of the adapter
4623 * that it finds in the system. The pci_dev strcuture indicates which
4624 * instance we are being called from.
4625 *
4626 * @dev: The PCI device to initialize.
4627 * @id: Looks like a pointer to the entry in our pci device table
4628 * that was actually matched by the PCI subsystem.
4629 *
4630 * Returns 0 on success, or an error code (-ve) on failure.
4631 **/
4632 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4633 {
4634 struct Scsi_Host *scsi_host = NULL;
4635 struct AdapterCtlBlk *acb = NULL;
4636 unsigned long io_port_base;
4637 unsigned int io_port_len;
4638 unsigned int irq;
4639
4640 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4641 banner_display();
4642
4643 if (pci_enable_device(dev))
4644 {
4645 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4646 return -ENODEV;
4647 }
4648 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4649 io_port_len = pci_resource_len(dev, 0);
4650 irq = dev->irq;
4651 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4652
4653 /* allocate scsi host information (includes out adapter) */
4654 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4655 sizeof(struct AdapterCtlBlk));
4656 if (!scsi_host) {
4657 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4658 goto fail;
4659 }
4660 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4661 acb->scsi_host = scsi_host;
4662 acb->dev = dev;
4663
4664 /* initialise the adapter and everything we need */
4665 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4666 dprintkl(KERN_INFO, "adapter init failed\n");
4667 goto fail;
4668 }
4669
4670 pci_set_master(dev);
4671
4672 /* get the scsi mid level to scan for new devices on the bus */
4673 if (scsi_add_host(scsi_host, &dev->dev)) {
4674 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4675 goto fail;
4676 }
4677 pci_set_drvdata(dev, scsi_host);
4678 scsi_scan_host(scsi_host);
4679
4680 return 0;
4681
4682 fail:
4683 if (acb != NULL)
4684 adapter_uninit(acb);
4685 if (scsi_host != NULL)
4686 scsi_host_put(scsi_host);
4687 pci_disable_device(dev);
4688 return -ENODEV;
4689 }
4690
4691
4692 /**
4693 * dc395x_remove_one - Called to remove a single instance of the
4694 * adapter.
4695 *
4696 * @dev: The PCI device to initialize.
4697 **/
4698 static void dc395x_remove_one(struct pci_dev *dev)
4699 {
4700 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4701 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4702
4703 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4704
4705 scsi_remove_host(scsi_host);
4706 adapter_uninit(acb);
4707 pci_disable_device(dev);
4708 scsi_host_put(scsi_host);
4709 }
4710
4711
4712 static struct pci_device_id dc395x_pci_table[] = {
4713 {
4714 .vendor = PCI_VENDOR_ID_TEKRAM,
4715 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4716 .subvendor = PCI_ANY_ID,
4717 .subdevice = PCI_ANY_ID,
4718 },
4719 {} /* Terminating entry */
4720 };
4721 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4722
4723
4724 static struct pci_driver dc395x_driver = {
4725 .name = DC395X_NAME,
4726 .id_table = dc395x_pci_table,
4727 .probe = dc395x_init_one,
4728 .remove = dc395x_remove_one,
4729 };
4730
4731
4732 /**
4733 * dc395x_module_init - Module initialization function
4734 *
4735 * Used by both module and built-in driver to initialise this driver.
4736 **/
4737 static int __init dc395x_module_init(void)
4738 {
4739 return pci_register_driver(&dc395x_driver);
4740 }
4741
4742
4743 /**
4744 * dc395x_module_exit - Module cleanup function.
4745 **/
4746 static void __exit dc395x_module_exit(void)
4747 {
4748 pci_unregister_driver(&dc395x_driver);
4749 }
4750
4751
4752 module_init(dc395x_module_init);
4753 module_exit(dc395x_module_exit);
4754
4755 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4756 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4757 MODULE_LICENSE("GPL");
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