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[NET_SCHED]: Fix endless loops caused by inaccurate qlen counters (part 1)
[hh.org.git] / drivers / scsi / dc395x.c
blobe95b367d09edd739af8e1739a8d9ed2a1b8d20aa
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 <asm/io.h>
61
62 #include <scsi/scsi.h>
63 #include <scsi/scsicam.h> /* needed for scsicam_bios_param */
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 transfered */
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 u16 srb_count;
311
312 u8 sel_timeout;
313
314 unsigned int irq_level;
315 u8 tag_max_num;
316 u8 acb_flag;
317 u8 gmode2;
318
319 u8 config;
320 u8 lun_chk;
321 u8 scan_devices;
322 u8 hostid_bit;
323
324 u8 dcb_map[DC395x_MAX_SCSI_ID];
325 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
326
327 struct pci_dev *dev;
328
329 u8 msg_len;
330
331 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
332 struct ScsiReqBlk srb;
333
334 struct NvRamType eeprom; /* eeprom settings for this adapter */
335 };
336
337
338 /*---------------------------------------------------------------------------
339 Forward declarations
340 ---------------------------------------------------------------------------*/
341 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
342 u16 *pscsi_status);
343 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
344 u16 *pscsi_status);
345 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
346 u16 *pscsi_status);
347 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
348 u16 *pscsi_status);
349 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
350 u16 *pscsi_status);
351 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
352 u16 *pscsi_status);
353 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
354 u16 *pscsi_status);
355 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
356 u16 *pscsi_status);
357 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
358 u16 *pscsi_status);
359 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
360 u16 *pscsi_status);
361 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
362 u16 *pscsi_status);
363 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
364 u16 *pscsi_status);
365 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
366 u16 *pscsi_status);
367 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
368 u16 *pscsi_status);
369 static void set_basic_config(struct AdapterCtlBlk *acb);
370 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
371 struct ScsiReqBlk *srb);
372 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
373 static void data_io_transfer(struct AdapterCtlBlk *acb,
374 struct ScsiReqBlk *srb, u16 io_dir);
375 static void disconnect(struct AdapterCtlBlk *acb);
376 static void reselect(struct AdapterCtlBlk *acb);
377 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
378 struct ScsiReqBlk *srb);
379 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
380 struct ScsiReqBlk *srb);
381 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
382 struct ScsiReqBlk *srb);
383 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
384 struct scsi_cmnd *cmd, u8 force);
385 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
386 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
387 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
388 struct ScsiReqBlk *srb);
389 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
390 struct ScsiReqBlk *srb);
391 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
392 struct ScsiReqBlk *srb);
393 static void set_xfer_rate(struct AdapterCtlBlk *acb,
394 struct DeviceCtlBlk *dcb);
395 static void waiting_timeout(unsigned long ptr);
396
397
398 /*---------------------------------------------------------------------------
399 Static Data
400 ---------------------------------------------------------------------------*/
401 static u16 current_sync_offset = 0;
402
403 static void *dc395x_scsi_phase0[] = {
404 data_out_phase0,/* phase:0 */
405 data_in_phase0, /* phase:1 */
406 command_phase0, /* phase:2 */
407 status_phase0, /* phase:3 */
408 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
409 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
410 msgout_phase0, /* phase:6 */
411 msgin_phase0, /* phase:7 */
412 };
413
414 static void *dc395x_scsi_phase1[] = {
415 data_out_phase1,/* phase:0 */
416 data_in_phase1, /* phase:1 */
417 command_phase1, /* phase:2 */
418 status_phase1, /* phase:3 */
419 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
420 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
421 msgout_phase1, /* phase:6 */
422 msgin_phase1, /* phase:7 */
423 };
424
425 /*
426 *Fast20: 000 50ns, 20.0 MHz
427 * 001 75ns, 13.3 MHz
428 * 010 100ns, 10.0 MHz
429 * 011 125ns, 8.0 MHz
430 * 100 150ns, 6.6 MHz
431 * 101 175ns, 5.7 MHz
432 * 110 200ns, 5.0 MHz
433 * 111 250ns, 4.0 MHz
434 *
435 *Fast40(LVDS): 000 25ns, 40.0 MHz
436 * 001 50ns, 20.0 MHz
437 * 010 75ns, 13.3 MHz
438 * 011 100ns, 10.0 MHz
439 * 100 125ns, 8.0 MHz
440 * 101 150ns, 6.6 MHz
441 * 110 175ns, 5.7 MHz
442 * 111 200ns, 5.0 MHz
443 */
444 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
445
446 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
447 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
448 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
449
450
451 /*---------------------------------------------------------------------------
452 Configuration
453 ---------------------------------------------------------------------------*/
454 /*
455 * Module/boot parameters currently effect *all* instances of the
456 * card in the system.
457 */
458
459 /*
460 * Command line parameters are stored in a structure below.
461 * These are the index's into the structure for the various
462 * command line options.
463 */
464 #define CFG_ADAPTER_ID 0
465 #define CFG_MAX_SPEED 1
466 #define CFG_DEV_MODE 2
467 #define CFG_ADAPTER_MODE 3
468 #define CFG_TAGS 4
469 #define CFG_RESET_DELAY 5
470
471 #define CFG_NUM 6 /* number of configuration items */
472
473
474 /*
475 * Value used to indicate that a command line override
476 * hasn't been used to modify the value.
477 */
478 #define CFG_PARAM_UNSET -1
479
480
481 /*
482 * Hold command line parameters.
483 */
484 struct ParameterData {
485 int value; /* value of this setting */
486 int min; /* minimum value */
487 int max; /* maximum value */
488 int def; /* default value */
489 int safe; /* safe value */
490 };
491 static struct ParameterData __devinitdata cfg_data[] = {
492 { /* adapter id */
493 CFG_PARAM_UNSET,
494 0,
495 15,
496 7,
497 7
498 },
499 { /* max speed */
500 CFG_PARAM_UNSET,
501 0,
502 7,
503 1, /* 13.3Mhz */
504 4, /* 6.7Hmz */
505 },
506 { /* dev mode */
507 CFG_PARAM_UNSET,
508 0,
509 0x3f,
510 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
511 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
512 NTC_DO_SEND_START,
513 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
514 },
515 { /* adapter mode */
516 CFG_PARAM_UNSET,
517 0,
518 0x2f,
519 #ifdef CONFIG_SCSI_MULTI_LUN
520 NAC_SCANLUN |
521 #endif
522 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
523 /*| NAC_ACTIVE_NEG*/,
524 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
525 },
526 { /* tags */
527 CFG_PARAM_UNSET,
528 0,
529 5,
530 3, /* 16 tags (??) */
531 2,
532 },
533 { /* reset delay */
534 CFG_PARAM_UNSET,
535 0,
536 180,
537 1, /* 1 second */
538 10, /* 10 seconds */
539 }
540 };
541
542
543 /*
544 * Safe settings. If set to zero the the BIOS/default values with
545 * command line overrides will be used. If set to 1 then safe and
546 * slow settings will be used.
547 */
548 static int use_safe_settings = 0;
549 module_param_named(safe, use_safe_settings, bool, 0);
550 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
551
552
553 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
554 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
555
556 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
557 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
558
559 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
560 MODULE_PARM_DESC(dev_mode, "Device mode.");
561
562 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
563 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
564
565 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
566 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
567
568 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
569 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
570
571
572 /**
573 * set_safe_settings - if the use_safe_settings option is set then
574 * set all values to the safe and slow values.
575 **/
576 static void __devinit 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 __devinit fix_settings(void)
596 {
597 int i;
598
599 dprintkdbg(DBG_1,
600 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
601 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
602 cfg_data[CFG_ADAPTER_ID].value,
603 cfg_data[CFG_MAX_SPEED].value,
604 cfg_data[CFG_DEV_MODE].value,
605 cfg_data[CFG_ADAPTER_MODE].value,
606 cfg_data[CFG_TAGS].value,
607 cfg_data[CFG_RESET_DELAY].value);
608 for (i = 0; i < CFG_NUM; i++)
609 {
610 if (cfg_data[i].value < cfg_data[i].min
611 || cfg_data[i].value > cfg_data[i].max)
612 cfg_data[i].value = cfg_data[i].def;
613 }
614 }
615
616
617
618 /*
619 * Mapping from the eeprom delay index value (index into this array)
620 * to the the number of actual seconds that the delay should be for.
621 */
622 static char __devinitdata 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 __devinit 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 __devinit 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 __devinit 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
756 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
757 {
758 struct list_head *head = &acb->srb_free_list;
759 struct ScsiReqBlk *srb = NULL;
760
761 if (!list_empty(head)) {
762 srb = list_entry(head->next, struct ScsiReqBlk, list);
763 list_del(head->next);
764 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
765 }
766 return srb;
767 }
768
769
770 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
771 {
772 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
773 list_add_tail(&srb->list, &acb->srb_free_list);
774 }
775
776
777 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
778 struct ScsiReqBlk *srb)
779 {
780 dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
781 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
782 list_add(&srb->list, &dcb->srb_waiting_list);
783 }
784
785
786 static void srb_waiting_append(struct DeviceCtlBlk *dcb,
787 struct ScsiReqBlk *srb)
788 {
789 dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
790 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
791 list_add_tail(&srb->list, &dcb->srb_waiting_list);
792 }
793
794
795 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
796 {
797 dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
798 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
799 list_add_tail(&srb->list, &dcb->srb_going_list);
800 }
801
802
803 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
804 {
805 struct ScsiReqBlk *i;
806 struct ScsiReqBlk *tmp;
807 dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
808 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
809
810 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
811 if (i == srb) {
812 list_del(&srb->list);
813 break;
814 }
815 }
816
817
818 static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
819 struct ScsiReqBlk *srb)
820 {
821 struct ScsiReqBlk *i;
822 struct ScsiReqBlk *tmp;
823 dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
824 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
825
826 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
827 if (i == srb) {
828 list_del(&srb->list);
829 break;
830 }
831 }
832
833
834 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
835 struct ScsiReqBlk *srb)
836 {
837 dprintkdbg(DBG_0,
838 "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
839 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
840 list_move(&srb->list, &dcb->srb_waiting_list);
841 }
842
843
844 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
845 struct ScsiReqBlk *srb)
846 {
847 dprintkdbg(DBG_0,
848 "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
849 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
850 list_move(&srb->list, &dcb->srb_going_list);
851 }
852
853
854 /* Sets the timer to wake us up */
855 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
856 {
857 if (timer_pending(&acb->waiting_timer))
858 return;
859 init_timer(&acb->waiting_timer);
860 acb->waiting_timer.function = waiting_timeout;
861 acb->waiting_timer.data = (unsigned long) acb;
862 if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
863 acb->waiting_timer.expires =
864 acb->scsi_host->last_reset - HZ / 2 + 1;
865 else
866 acb->waiting_timer.expires = jiffies + to + 1;
867 add_timer(&acb->waiting_timer);
868 }
869
870
871 /* Send the next command from the waiting list to the bus */
872 static void waiting_process_next(struct AdapterCtlBlk *acb)
873 {
874 struct DeviceCtlBlk *start = NULL;
875 struct DeviceCtlBlk *pos;
876 struct DeviceCtlBlk *dcb;
877 struct ScsiReqBlk *srb;
878 struct list_head *dcb_list_head = &acb->dcb_list;
879
880 if (acb->active_dcb
881 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
882 return;
883
884 if (timer_pending(&acb->waiting_timer))
885 del_timer(&acb->waiting_timer);
886
887 if (list_empty(dcb_list_head))
888 return;
889
890 /*
891 * Find the starting dcb. Need to find it again in the list
892 * since the list may have changed since we set the ptr to it
893 */
894 list_for_each_entry(dcb, dcb_list_head, list)
895 if (dcb == acb->dcb_run_robin) {
896 start = dcb;
897 break;
898 }
899 if (!start) {
900 /* This can happen! */
901 start = list_entry(dcb_list_head->next, typeof(*start), list);
902 acb->dcb_run_robin = start;
903 }
904
905
906 /*
907 * Loop over the dcb, but we start somewhere (potentially) in
908 * the middle of the loop so we need to manully do this.
909 */
910 pos = start;
911 do {
912 struct list_head *waiting_list_head = &pos->srb_waiting_list;
913
914 /* Make sure, the next another device gets scheduled ... */
915 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
916 acb->dcb_run_robin);
917
918 if (list_empty(waiting_list_head) ||
919 pos->max_command <= list_size(&pos->srb_going_list)) {
920 /* move to next dcb */
921 pos = dcb_get_next(dcb_list_head, pos);
922 } else {
923 srb = list_entry(waiting_list_head->next,
924 struct ScsiReqBlk, list);
925
926 /* Try to send to the bus */
927 if (!start_scsi(acb, pos, srb))
928 srb_waiting_to_going_move(pos, srb);
929 else
930 waiting_set_timer(acb, HZ/50);
931 break;
932 }
933 } while (pos != start);
934 }
935
936
937 /* Wake up waiting queue */
938 static void waiting_timeout(unsigned long ptr)
939 {
940 unsigned long flags;
941 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
942 dprintkdbg(DBG_1,
943 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
944 DC395x_LOCK_IO(acb->scsi_host, flags);
945 waiting_process_next(acb);
946 DC395x_UNLOCK_IO(acb->scsi_host, flags);
947 }
948
949
950 /* Get the DCB for a given ID/LUN combination */
951 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
952 {
953 return acb->children[id][lun];
954 }
955
956
957 /* Send SCSI Request Block (srb) to adapter (acb) */
958 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
959 {
960 struct DeviceCtlBlk *dcb = srb->dcb;
961
962 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
963 acb->active_dcb ||
964 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
965 srb_waiting_append(dcb, srb);
966 waiting_process_next(acb);
967 return;
968 }
969
970 if (!start_scsi(acb, dcb, srb))
971 srb_going_append(dcb, srb);
972 else {
973 srb_waiting_insert(dcb, srb);
974 waiting_set_timer(acb, HZ / 50);
975 }
976 }
977
978 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
979 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
980 struct ScsiReqBlk *srb)
981 {
982 enum dma_data_direction dir = cmd->sc_data_direction;
983 dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
984 cmd->pid, dcb->target_id, dcb->target_lun);
985
986 srb->dcb = dcb;
987 srb->cmd = cmd;
988 srb->sg_count = 0;
989 srb->total_xfer_length = 0;
990 srb->sg_bus_addr = 0;
991 srb->sg_index = 0;
992 srb->adapter_status = 0;
993 srb->target_status = 0;
994 srb->msg_count = 0;
995 srb->status = 0;
996 srb->flag = 0;
997 srb->state = 0;
998 srb->retry_count = 0;
999 srb->tag_number = TAG_NONE;
1000 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1001 srb->end_message = 0;
1002
1003 if (dir == PCI_DMA_NONE || !cmd->request_buffer) {
1004 dprintkdbg(DBG_0,
1005 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1006 cmd->bufflen, cmd->request_buffer,
1007 cmd->use_sg, srb->segment_x[0].address);
1008 } else if (cmd->use_sg) {
1009 int i;
1010 u32 reqlen = cmd->request_bufflen;
1011 struct scatterlist *sl = (struct scatterlist *)
1012 cmd->request_buffer;
1013 struct SGentry *sgp = srb->segment_x;
1014 srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg,
1015 dir);
1016 dprintkdbg(DBG_0,
1017 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1018 reqlen, cmd->request_buffer, cmd->use_sg,
1019 srb->sg_count);
1020
1021 for (i = 0; i < srb->sg_count; i++) {
1022 u32 busaddr = (u32)sg_dma_address(&sl[i]);
1023 u32 seglen = (u32)sl[i].length;
1024 sgp[i].address = busaddr;
1025 sgp[i].length = seglen;
1026 srb->total_xfer_length += seglen;
1027 }
1028 sgp += srb->sg_count - 1;
1029
1030 /*
1031 * adjust last page if too big as it is allocated
1032 * on even page boundaries
1033 */
1034 if (srb->total_xfer_length > reqlen) {
1035 sgp->length -= (srb->total_xfer_length - reqlen);
1036 srb->total_xfer_length = reqlen;
1037 }
1038
1039 /* Fixup for WIDE padding - make sure length is even */
1040 if (dcb->sync_period & WIDE_SYNC &&
1041 srb->total_xfer_length % 2) {
1042 srb->total_xfer_length++;
1043 sgp->length++;
1044 }
1045
1046 srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1047 srb->segment_x,
1048 SEGMENTX_LEN,
1049 PCI_DMA_TODEVICE);
1050
1051 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1052 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1053 } else {
1054 srb->total_xfer_length = cmd->request_bufflen;
1055 srb->sg_count = 1;
1056 srb->segment_x[0].address =
1057 pci_map_single(dcb->acb->dev, cmd->request_buffer,
1058 srb->total_xfer_length, dir);
1059
1060 /* Fixup for WIDE padding - make sure length is even */
1061 if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2)
1062 srb->total_xfer_length++;
1063
1064 srb->segment_x[0].length = srb->total_xfer_length;
1065
1066 dprintkdbg(DBG_0,
1067 "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n",
1068 srb->total_xfer_length, cmd->request_buffer,
1069 cmd->use_sg, srb->segment_x[0].address);
1070 }
1071
1072 srb->request_length = srb->total_xfer_length;
1073 }
1074
1075
1076 /**
1077 * dc395x_queue_command - queue scsi command passed from the mid
1078 * layer, invoke 'done' on completion
1079 *
1080 * @cmd: pointer to scsi command object
1081 * @done: function pointer to be invoked on completion
1082 *
1083 * Returns 1 if the adapter (host) is busy, else returns 0. One
1084 * reason for an adapter to be busy is that the number
1085 * of outstanding queued commands is already equal to
1086 * struct Scsi_Host::can_queue .
1087 *
1088 * Required: if struct Scsi_Host::can_queue is ever non-zero
1089 * then this function is required.
1090 *
1091 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1092 * and is expected to be held on return.
1093 *
1094 **/
1095 static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1096 {
1097 struct DeviceCtlBlk *dcb;
1098 struct ScsiReqBlk *srb;
1099 struct AdapterCtlBlk *acb =
1100 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1101 dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n",
1102 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
1103
1104 /* Assume BAD_TARGET; will be cleared later */
1105 cmd->result = DID_BAD_TARGET << 16;
1106
1107 /* ignore invalid targets */
1108 if (cmd->device->id >= acb->scsi_host->max_id ||
1109 cmd->device->lun >= acb->scsi_host->max_lun ||
1110 cmd->device->lun >31) {
1111 goto complete;
1112 }
1113
1114 /* does the specified lun on the specified device exist */
1115 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1116 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1117 cmd->device->id, cmd->device->lun);
1118 goto complete;
1119 }
1120
1121 /* do we have a DCB for the device */
1122 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1123 if (!dcb) {
1124 /* should never happen */
1125 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1126 cmd->device->id, cmd->device->lun);
1127 goto complete;
1128 }
1129
1130 /* set callback and clear result in the command */
1131 cmd->scsi_done = done;
1132 cmd->result = 0;
1133
1134 srb = srb_get_free(acb);
1135 if (!srb)
1136 {
1137 /*
1138 * Return 1 since we are unable to queue this command at this
1139 * point in time.
1140 */
1141 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1142 return 1;
1143 }
1144
1145 build_srb(cmd, dcb, srb);
1146
1147 if (!list_empty(&dcb->srb_waiting_list)) {
1148 /* append to waiting queue */
1149 srb_waiting_append(dcb, srb);
1150 waiting_process_next(acb);
1151 } else {
1152 /* process immediately */
1153 send_srb(acb, srb);
1154 }
1155 dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid);
1156 return 0;
1157
1158 complete:
1159 /*
1160 * Complete the command immediatey, and then return 0 to
1161 * indicate that we have handled the command. This is usually
1162 * done when the commad is for things like non existent
1163 * devices.
1164 */
1165 done(cmd);
1166 return 0;
1167 }
1168
1169
1170 /*
1171 * Return the disk geometry for the given SCSI device.
1172 */
1173 static int dc395x_bios_param(struct scsi_device *sdev,
1174 struct block_device *bdev, sector_t capacity, int *info)
1175 {
1176 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1177 int heads, sectors, cylinders;
1178 struct AdapterCtlBlk *acb;
1179 int size = capacity;
1180
1181 dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1182 acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1183 heads = 64;
1184 sectors = 32;
1185 cylinders = size / (heads * sectors);
1186
1187 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1188 heads = 255;
1189 sectors = 63;
1190 cylinders = size / (heads * sectors);
1191 }
1192 geom[0] = heads;
1193 geom[1] = sectors;
1194 geom[2] = cylinders;
1195 return 0;
1196 #else
1197 return scsicam_bios_param(bdev, capacity, info);
1198 #endif
1199 }
1200
1201
1202 static void dump_register_info(struct AdapterCtlBlk *acb,
1203 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1204 {
1205 u16 pstat;
1206 struct pci_dev *dev = acb->dev;
1207 pci_read_config_word(dev, PCI_STATUS, &pstat);
1208 if (!dcb)
1209 dcb = acb->active_dcb;
1210 if (!srb && dcb)
1211 srb = dcb->active_srb;
1212 if (srb) {
1213 if (!srb->cmd)
1214 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1215 srb, srb->cmd);
1216 else
1217 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) "
1218 "cmnd=0x%02x <%02i-%i>\n",
1219 srb, srb->cmd, srb->cmd->pid,
1220 srb->cmd->cmnd[0], srb->cmd->device->id,
1221 srb->cmd->device->lun);
1222 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1223 srb->segment_x, srb->sg_count, srb->sg_index,
1224 srb->total_xfer_length);
1225 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1226 srb->state, srb->status, srb->scsi_phase,
1227 (acb->active_dcb) ? "" : "not");
1228 }
1229 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1230 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1231 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1232 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1233 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1234 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1235 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1236 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1237 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1238 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1239 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1240 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1241 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1242 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1243 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1244 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1245 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1246 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1247 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1248 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1249 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1250 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1251 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1252 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1253 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1254 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1255 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1256 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1257 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1258 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1259 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1260 "pci{status=0x%04x}\n",
1261 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1262 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1263 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1264 pstat);
1265 }
1266
1267
1268 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1269 {
1270 #if debug_enabled(DBG_FIFO)
1271 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1272 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1273 if (!(fifocnt & 0x40))
1274 dprintkdbg(DBG_FIFO,
1275 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1276 fifocnt & 0x3f, lines, txt);
1277 #endif
1278 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1279 }
1280
1281
1282 static void reset_dev_param(struct AdapterCtlBlk *acb)
1283 {
1284 struct DeviceCtlBlk *dcb;
1285 struct NvRamType *eeprom = &acb->eeprom;
1286 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1287
1288 list_for_each_entry(dcb, &acb->dcb_list, list) {
1289 u8 period_index;
1290
1291 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1292 dcb->sync_period = 0;
1293 dcb->sync_offset = 0;
1294
1295 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1296 period_index = eeprom->target[dcb->target_id].period & 0x07;
1297 dcb->min_nego_period = clock_period[period_index];
1298 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1299 || !(acb->config & HCC_WIDE_CARD))
1300 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1301 }
1302 }
1303
1304
1305 /*
1306 * perform a hard reset on the SCSI bus
1307 * @cmd - some command for this host (for fetching hooks)
1308 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1309 */
1310 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1311 {
1312 struct AdapterCtlBlk *acb =
1313 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1314 dprintkl(KERN_INFO,
1315 "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n",
1316 cmd->pid, cmd->device->id, cmd->device->lun, cmd);
1317
1318 if (timer_pending(&acb->waiting_timer))
1319 del_timer(&acb->waiting_timer);
1320
1321 /*
1322 * disable interrupt
1323 */
1324 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1325 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1326 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1327 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1328
1329 reset_scsi_bus(acb);
1330 udelay(500);
1331
1332 /* We may be in serious trouble. Wait some seconds */
1333 acb->scsi_host->last_reset =
1334 jiffies + 3 * HZ / 2 +
1335 HZ * acb->eeprom.delay_time;
1336
1337 /*
1338 * re-enable interrupt
1339 */
1340 /* Clear SCSI FIFO */
1341 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1342 clear_fifo(acb, "eh_bus_reset");
1343 /* Delete pending IRQ */
1344 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1345 set_basic_config(acb);
1346
1347 reset_dev_param(acb);
1348 doing_srb_done(acb, DID_RESET, cmd, 0);
1349 acb->active_dcb = NULL;
1350 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1351 waiting_process_next(acb);
1352
1353 return SUCCESS;
1354 }
1355
1356 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1357 {
1358 int rc;
1359
1360 spin_lock_irq(cmd->device->host->host_lock);
1361 rc = __dc395x_eh_bus_reset(cmd);
1362 spin_unlock_irq(cmd->device->host->host_lock);
1363
1364 return rc;
1365 }
1366
1367 /*
1368 * abort an errant SCSI command
1369 * @cmd - command to be aborted
1370 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1371 */
1372 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1373 {
1374 /*
1375 * Look into our command queues: If it has not been sent already,
1376 * we remove it and return success. Otherwise fail.
1377 */
1378 struct AdapterCtlBlk *acb =
1379 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1380 struct DeviceCtlBlk *dcb;
1381 struct ScsiReqBlk *srb;
1382 dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n",
1383 cmd->pid, cmd->device->id, cmd->device->lun, cmd);
1384
1385 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1386 if (!dcb) {
1387 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1388 return FAILED;
1389 }
1390
1391 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1392 if (srb) {
1393 srb_waiting_remove(dcb, srb);
1394 pci_unmap_srb_sense(acb, srb);
1395 pci_unmap_srb(acb, srb);
1396 free_tag(dcb, srb);
1397 srb_free_insert(acb, srb);
1398 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1399 cmd->result = DID_ABORT << 16;
1400 return SUCCESS;
1401 }
1402 srb = find_cmd(cmd, &dcb->srb_going_list);
1403 if (srb) {
1404 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1405 /* XXX: Should abort the command here */
1406 } else {
1407 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1408 }
1409 return FAILED;
1410 }
1411
1412
1413 /* SDTR */
1414 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1415 struct ScsiReqBlk *srb)
1416 {
1417 u8 *ptr = srb->msgout_buf + srb->msg_count;
1418 if (srb->msg_count > 1) {
1419 dprintkl(KERN_INFO,
1420 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1421 srb->msg_count, srb->msgout_buf[0],
1422 srb->msgout_buf[1]);
1423 return;
1424 }
1425 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1426 dcb->sync_offset = 0;
1427 dcb->min_nego_period = 200 >> 2;
1428 } else if (dcb->sync_offset == 0)
1429 dcb->sync_offset = SYNC_NEGO_OFFSET;
1430
1431 *ptr++ = MSG_EXTENDED; /* (01h) */
1432 *ptr++ = 3; /* length */
1433 *ptr++ = EXTENDED_SDTR; /* (01h) */
1434 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1435 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1436 srb->msg_count += 5;
1437 srb->state |= SRB_DO_SYNC_NEGO;
1438 }
1439
1440
1441 /* WDTR */
1442 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1443 struct ScsiReqBlk *srb)
1444 {
1445 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1446 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1447 u8 *ptr = srb->msgout_buf + srb->msg_count;
1448 if (srb->msg_count > 1) {
1449 dprintkl(KERN_INFO,
1450 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1451 srb->msg_count, srb->msgout_buf[0],
1452 srb->msgout_buf[1]);
1453 return;
1454 }
1455 *ptr++ = MSG_EXTENDED; /* (01h) */
1456 *ptr++ = 2; /* length */
1457 *ptr++ = EXTENDED_WDTR; /* (03h) */
1458 *ptr++ = wide;
1459 srb->msg_count += 4;
1460 srb->state |= SRB_DO_WIDE_NEGO;
1461 }
1462
1463
1464 #if 0
1465 /* Timer to work around chip flaw: When selecting and the bus is
1466 * busy, we sometimes miss a Selection timeout IRQ */
1467 void selection_timeout_missed(unsigned long ptr);
1468 /* Sets the timer to wake us up */
1469 static void selto_timer(struct AdapterCtlBlk *acb)
1470 {
1471 if (timer_pending(&acb->selto_timer))
1472 return;
1473 acb->selto_timer.function = selection_timeout_missed;
1474 acb->selto_timer.data = (unsigned long) acb;
1475 if (time_before
1476 (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
1477 acb->selto_timer.expires =
1478 acb->scsi_host->last_reset + HZ / 2 + 1;
1479 else
1480 acb->selto_timer.expires = jiffies + HZ + 1;
1481 add_timer(&acb->selto_timer);
1482 }
1483
1484
1485 void selection_timeout_missed(unsigned long ptr)
1486 {
1487 unsigned long flags;
1488 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1489 struct ScsiReqBlk *srb;
1490 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1491 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1492 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1493 return;
1494 }
1495 DC395x_LOCK_IO(acb->scsi_host, flags);
1496 srb = acb->active_dcb->active_srb;
1497 disconnect(acb);
1498 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1499 }
1500 #endif
1501
1502
1503 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1504 struct ScsiReqBlk* srb)
1505 {
1506 u16 s_stat2, return_code;
1507 u8 s_stat, scsicommand, i, identify_message;
1508 u8 *ptr;
1509 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n",
1510 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
1511
1512 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1513
1514 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1515 s_stat2 = 0;
1516 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1517 #if 1
1518 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1519 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n",
1520 srb->cmd->pid, s_stat, s_stat2);
1521 /*
1522 * Try anyway?
1523 *
1524 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1525 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed!
1526 * (This is likely to be a bug in the hardware. Obviously, most people
1527 * only have one initiator per SCSI bus.)
1528 * Instead let this fail and have the timer make sure the command is
1529 * tried again after a short time
1530 */
1531 /*selto_timer (acb); */
1532 return 1;
1533 }
1534 #endif
1535 if (acb->active_dcb) {
1536 dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a"
1537 "command while another command (pid#%li) is active.",
1538 srb->cmd->pid,
1539 acb->active_dcb->active_srb ?
1540 acb->active_dcb->active_srb->cmd->pid : 0);
1541 return 1;
1542 }
1543 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1544 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n",
1545 srb->cmd->pid);
1546 return 1;
1547 }
1548 /* Allow starting of SCSI commands half a second before we allow the mid-level
1549 * to queue them again after a reset */
1550 if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
1551 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1552 return 1;
1553 }
1554
1555 /* Flush FIFO */
1556 clear_fifo(acb, "start_scsi");
1557 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1558 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1559 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1560 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1561 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1562
1563 identify_message = dcb->identify_msg;
1564 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1565 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1566 if (srb->flag & AUTO_REQSENSE)
1567 identify_message &= 0xBF;
1568
1569 if (((srb->cmd->cmnd[0] == INQUIRY)
1570 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1571 || (srb->flag & AUTO_REQSENSE))
1572 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1573 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1574 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1575 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1576 && (dcb->target_lun == 0)) {
1577 srb->msgout_buf[0] = identify_message;
1578 srb->msg_count = 1;
1579 scsicommand = SCMD_SEL_ATNSTOP;
1580 srb->state = SRB_MSGOUT;
1581 #ifndef SYNC_FIRST
1582 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1583 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1584 build_wdtr(acb, dcb, srb);
1585 goto no_cmd;
1586 }
1587 #endif
1588 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1589 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1590 build_sdtr(acb, dcb, srb);
1591 goto no_cmd;
1592 }
1593 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1594 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1595 build_wdtr(acb, dcb, srb);
1596 goto no_cmd;
1597 }
1598 srb->msg_count = 0;
1599 }
1600 /* Send identify message */
1601 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1602
1603 scsicommand = SCMD_SEL_ATN;
1604 srb->state = SRB_START_;
1605 #ifndef DC395x_NO_TAGQ
1606 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1607 && (identify_message & 0xC0)) {
1608 /* Send Tag message */
1609 u32 tag_mask = 1;
1610 u8 tag_number = 0;
1611 while (tag_mask & dcb->tag_mask
1612 && tag_number <= dcb->max_command) {
1613 tag_mask = tag_mask << 1;
1614 tag_number++;
1615 }
1616 if (tag_number >= dcb->max_command) {
1617 dprintkl(KERN_WARNING, "start_scsi: (pid#%li) "
1618 "Out of tags target=<%02i-%i>)\n",
1619 srb->cmd->pid, srb->cmd->device->id,
1620 srb->cmd->device->lun);
1621 srb->state = SRB_READY;
1622 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1623 DO_HWRESELECT);
1624 return 1;
1625 }
1626 /* Send Tag id */
1627 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1628 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1629 dcb->tag_mask |= tag_mask;
1630 srb->tag_number = tag_number;
1631 scsicommand = SCMD_SEL_ATN3;
1632 srb->state = SRB_START_;
1633 }
1634 #endif
1635 /*polling:*/
1636 /* Send CDB ..command block ......... */
1637 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n",
1638 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
1639 srb->cmd->cmnd[0], srb->tag_number);
1640 if (srb->flag & AUTO_REQSENSE) {
1641 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1642 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1643 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1644 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1645 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
1646 sizeof(srb->cmd->sense_buffer));
1647 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1648 } else {
1649 ptr = (u8 *)srb->cmd->cmnd;
1650 for (i = 0; i < srb->cmd->cmd_len; i++)
1651 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1652 }
1653 no_cmd:
1654 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1655 DO_HWRESELECT | DO_DATALATCH);
1656 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1657 /*
1658 * If start_scsi return 1:
1659 * we caught an interrupt (must be reset or reselection ... )
1660 * : Let's process it first!
1661 */
1662 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
1663 srb->cmd->pid, dcb->target_id, dcb->target_lun);
1664 srb->state = SRB_READY;
1665 free_tag(dcb, srb);
1666 srb->msg_count = 0;
1667 return_code = 1;
1668 /* This IRQ should NOT get lost, as we did not acknowledge it */
1669 } else {
1670 /*
1671 * If start_scsi returns 0:
1672 * we know that the SCSI processor is free
1673 */
1674 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1675 dcb->active_srb = srb;
1676 acb->active_dcb = dcb;
1677 return_code = 0;
1678 /* it's important for atn stop */
1679 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1680 DO_DATALATCH | DO_HWRESELECT);
1681 /* SCSI command */
1682 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1683 }
1684 return return_code;
1685 }
1686
1687
1688 #define DC395x_ENABLE_MSGOUT \
1689 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1690 srb->state |= SRB_MSGOUT
1691
1692
1693 /* abort command */
1694 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1695 struct ScsiReqBlk *srb)
1696 {
1697 srb->msgout_buf[0] = ABORT;
1698 srb->msg_count = 1;
1699 DC395x_ENABLE_MSGOUT;
1700 srb->state &= ~SRB_MSGIN;
1701 srb->state |= SRB_MSGOUT;
1702 }
1703
1704
1705 /**
1706 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1707 * have been triggered for this card.
1708 *
1709 * @acb: a pointer to the adpter control block
1710 * @scsi_status: the status return when we checked the card
1711 **/
1712 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1713 u16 scsi_status)
1714 {
1715 struct DeviceCtlBlk *dcb;
1716 struct ScsiReqBlk *srb;
1717 u16 phase;
1718 u8 scsi_intstatus;
1719 unsigned long flags;
1720 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1721 u16 *);
1722
1723 DC395x_LOCK_IO(acb->scsi_host, flags);
1724
1725 /* This acknowledges the IRQ */
1726 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1727 if ((scsi_status & 0x2007) == 0x2002)
1728 dprintkl(KERN_DEBUG,
1729 "COP after COP completed? %04x\n", scsi_status);
1730 if (debug_enabled(DBG_KG)) {
1731 if (scsi_intstatus & INT_SELTIMEOUT)
1732 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1733 }
1734 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1735
1736 if (timer_pending(&acb->selto_timer))
1737 del_timer(&acb->selto_timer);
1738
1739 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1740 disconnect(acb); /* bus free interrupt */
1741 goto out_unlock;
1742 }
1743 if (scsi_intstatus & INT_RESELECTED) {
1744 reselect(acb);
1745 goto out_unlock;
1746 }
1747 if (scsi_intstatus & INT_SELECT) {
1748 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1749 goto out_unlock;
1750 }
1751 if (scsi_intstatus & INT_SCSIRESET) {
1752 scsi_reset_detect(acb);
1753 goto out_unlock;
1754 }
1755 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1756 dcb = acb->active_dcb;
1757 if (!dcb) {
1758 dprintkl(KERN_DEBUG,
1759 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1760 scsi_status, scsi_intstatus);
1761 goto out_unlock;
1762 }
1763 srb = dcb->active_srb;
1764 if (dcb->flag & ABORT_DEV_) {
1765 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1766 enable_msgout_abort(acb, srb);
1767 }
1768
1769 /* software sequential machine */
1770 phase = (u16)srb->scsi_phase;
1771
1772 /*
1773 * 62037 or 62137
1774 * call dc395x_scsi_phase0[]... "phase entry"
1775 * handle every phase before start transfer
1776 */
1777 /* data_out_phase0, phase:0 */
1778 /* data_in_phase0, phase:1 */
1779 /* command_phase0, phase:2 */
1780 /* status_phase0, phase:3 */
1781 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1782 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1783 /* msgout_phase0, phase:6 */
1784 /* msgin_phase0, phase:7 */
1785 dc395x_statev = dc395x_scsi_phase0[phase];
1786 dc395x_statev(acb, srb, &scsi_status);
1787
1788 /*
1789 * if there were any exception occured scsi_status
1790 * will be modify to bus free phase new scsi_status
1791 * transfer out from ... previous dc395x_statev
1792 */
1793 srb->scsi_phase = scsi_status & PHASEMASK;
1794 phase = (u16)scsi_status & PHASEMASK;
1795
1796 /*
1797 * call dc395x_scsi_phase1[]... "phase entry" handle
1798 * every phase to do transfer
1799 */
1800 /* data_out_phase1, phase:0 */
1801 /* data_in_phase1, phase:1 */
1802 /* command_phase1, phase:2 */
1803 /* status_phase1, phase:3 */
1804 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1805 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1806 /* msgout_phase1, phase:6 */
1807 /* msgin_phase1, phase:7 */
1808 dc395x_statev = dc395x_scsi_phase1[phase];
1809 dc395x_statev(acb, srb, &scsi_status);
1810 }
1811 out_unlock:
1812 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1813 }
1814
1815
1816 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1817 {
1818 struct AdapterCtlBlk *acb = dev_id;
1819 u16 scsi_status;
1820 u8 dma_status;
1821 irqreturn_t handled = IRQ_NONE;
1822
1823 /*
1824 * Check for pending interupt
1825 */
1826 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1827 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1828 if (scsi_status & SCSIINTERRUPT) {
1829 /* interupt pending - let's process it! */
1830 dc395x_handle_interrupt(acb, scsi_status);
1831 handled = IRQ_HANDLED;
1832 }
1833 else if (dma_status & 0x20) {
1834 /* Error from the DMA engine */
1835 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1836 #if 0
1837 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1838 if (acb->active_dcb) {
1839 acb->active_dcb-> flag |= ABORT_DEV_;
1840 if (acb->active_dcb->active_srb)
1841 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1842 }
1843 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1844 #else
1845 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1846 acb = NULL;
1847 #endif
1848 handled = IRQ_HANDLED;
1849 }
1850
1851 return handled;
1852 }
1853
1854
1855 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1856 u16 *pscsi_status)
1857 {
1858 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid);
1859 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1860 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1861
1862 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1863 srb->state &= ~SRB_MSGOUT;
1864 }
1865
1866
1867 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1868 u16 *pscsi_status)
1869 {
1870 u16 i;
1871 u8 *ptr;
1872 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid);
1873
1874 clear_fifo(acb, "msgout_phase1");
1875 if (!(srb->state & SRB_MSGOUT)) {
1876 srb->state |= SRB_MSGOUT;
1877 dprintkl(KERN_DEBUG,
1878 "msgout_phase1: (pid#%li) Phase unexpected\n",
1879 srb->cmd->pid); /* So what ? */
1880 }
1881 if (!srb->msg_count) {
1882 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
1883 srb->cmd->pid);
1884 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1885 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1886 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1887 return;
1888 }
1889 ptr = (u8 *)srb->msgout_buf;
1890 for (i = 0; i < srb->msg_count; i++)
1891 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1892 srb->msg_count = 0;
1893 if (srb->msgout_buf[0] == MSG_ABORT)
1894 srb->state = SRB_ABORT_SENT;
1895
1896 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1897 }
1898
1899
1900 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1901 u16 *pscsi_status)
1902 {
1903 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid);
1904 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1905 }
1906
1907
1908 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1909 u16 *pscsi_status)
1910 {
1911 struct DeviceCtlBlk *dcb;
1912 u8 *ptr;
1913 u16 i;
1914 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid);
1915
1916 clear_fifo(acb, "command_phase1");
1917 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1918 if (!(srb->flag & AUTO_REQSENSE)) {
1919 ptr = (u8 *)srb->cmd->cmnd;
1920 for (i = 0; i < srb->cmd->cmd_len; i++) {
1921 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1922 ptr++;
1923 }
1924 } else {
1925 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1926 dcb = acb->active_dcb;
1927 /* target id */
1928 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1929 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1930 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1931 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
1932 sizeof(srb->cmd->sense_buffer));
1933 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1934 }
1935 srb->state |= SRB_COMMAND;
1936 /* it's important for atn stop */
1937 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1938 /* SCSI command */
1939 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1940 }
1941
1942
1943 /*
1944 * Verify that the remaining space in the hw sg lists is the same as
1945 * the count of remaining bytes in srb->total_xfer_length
1946 */
1947 static void sg_verify_length(struct ScsiReqBlk *srb)
1948 {
1949 if (debug_enabled(DBG_SG)) {
1950 unsigned len = 0;
1951 unsigned idx = srb->sg_index;
1952 struct SGentry *psge = srb->segment_x + idx;
1953 for (; idx < srb->sg_count; psge++, idx++)
1954 len += psge->length;
1955 if (len != srb->total_xfer_length)
1956 dprintkdbg(DBG_SG,
1957 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1958 srb->total_xfer_length, len);
1959 }
1960 }
1961
1962
1963 /*
1964 * Compute the next Scatter Gather list index and adjust its length
1965 * and address if necessary
1966 */
1967 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1968 {
1969 u8 idx;
1970 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
1971 struct SGentry *psge = srb->segment_x + srb->sg_index;
1972
1973 dprintkdbg(DBG_0,
1974 "sg_update_list: Transfered %i of %i bytes, %i remain\n",
1975 xferred, srb->total_xfer_length, left);
1976 if (xferred == 0) {
1977 /* nothing to update since we did not transfer any data */
1978 return;
1979 }
1980
1981 sg_verify_length(srb);
1982 srb->total_xfer_length = left; /* update remaining count */
1983 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1984 if (xferred >= psge->length) {
1985 /* Complete SG entries done */
1986 xferred -= psge->length;
1987 } else {
1988 /* Partial SG entry done */
1989 psge->length -= xferred;
1990 psge->address += xferred;
1991 srb->sg_index = idx;
1992 pci_dma_sync_single_for_device(srb->dcb->
1993 acb->dev,
1994 srb->sg_bus_addr,
1995 SEGMENTX_LEN,
1996 PCI_DMA_TODEVICE);
1997 break;
1998 }
1999 psge++;
2000 }
2001 sg_verify_length(srb);
2002 }
2003
2004
2005 /*
2006 * We have transfered a single byte (PIO mode?) and need to update
2007 * the count of bytes remaining (total_xfer_length) and update the sg
2008 * entry to either point to next byte in the current sg entry, or of
2009 * already at the end to point to the start of the next sg entry
2010 */
2011 static void sg_subtract_one(struct ScsiReqBlk *srb)
2012 {
2013 sg_update_list(srb, srb->total_xfer_length - 1);
2014 }
2015
2016
2017 /*
2018 * cleanup_after_transfer
2019 *
2020 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2021 * KG: Currently called from StatusPhase1 ()
2022 * Should probably also be called from other places
2023 * Best might be to call it in DataXXPhase0, if new phase will differ
2024 */
2025 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2026 struct ScsiReqBlk *srb)
2027 {
2028 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2029 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2030 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2031 clear_fifo(acb, "cleanup/in");
2032 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2033 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2034 } else { /* write */
2035 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2036 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2037 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2038 clear_fifo(acb, "cleanup/out");
2039 }
2040 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2041 }
2042
2043
2044 /*
2045 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
2046 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2047 */
2048 #define DC395x_LASTPIO 4
2049
2050
2051 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2052 u16 *pscsi_status)
2053 {
2054 struct DeviceCtlBlk *dcb = srb->dcb;
2055 u16 scsi_status = *pscsi_status;
2056 u32 d_left_counter = 0;
2057 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
2058 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2059
2060 /*
2061 * KG: We need to drain the buffers before we draw any conclusions!
2062 * This means telling the DMA to push the rest into SCSI, telling
2063 * SCSI to push the rest to the bus.
2064 * However, the device might have been the one to stop us (phase
2065 * change), and the data in transit just needs to be accounted so
2066 * it can be retransmitted.)
2067 */
2068 /*
2069 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2070 * If we need more data, the DMA SG list will be freshly set up, anyway
2071 */
2072 dprintkdbg(DBG_PIO, "data_out_phase0: "
2073 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2074 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2075 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2076 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2077 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2078 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2079 srb->total_xfer_length);
2080 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2081
2082 if (!(srb->state & SRB_XFERPAD)) {
2083 if (scsi_status & PARITYERROR)
2084 srb->status |= PARITY_ERROR;
2085
2086 /*
2087 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2088 * is the no of bytes it got from the DMA engine not the no it
2089 * transferred successfully to the device. (And the difference could
2090 * be as much as the FIFO size, I guess ...)
2091 */
2092 if (!(scsi_status & SCSIXFERDONE)) {
2093 /*
2094 * when data transfer from DMA FIFO to SCSI FIFO
2095 * if there was some data left in SCSI FIFO
2096 */
2097 d_left_counter =
2098 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2099 0x1F);
2100 if (dcb->sync_period & WIDE_SYNC)
2101 d_left_counter <<= 1;
2102
2103 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2104 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2105 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2106 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2107 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2108 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2109 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2110 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2111 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2112 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2113 }
2114 /*
2115 * calculate all the residue data that not yet tranfered
2116 * SCSI transfer counter + left in SCSI FIFO data
2117 *
2118 * .....TRM_S1040_SCSI_COUNTER (24bits)
2119 * The counter always decrement by one for every SCSI byte transfer.
2120 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2121 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2122 */
2123 if (srb->total_xfer_length > DC395x_LASTPIO)
2124 d_left_counter +=
2125 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2126
2127 /* Is this a good idea? */
2128 /*clear_fifo(acb, "DOP1"); */
2129 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2130 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2131 && srb->cmd->request_bufflen % 2) {
2132 d_left_counter = 0;
2133 dprintkl(KERN_INFO,
2134 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2135 scsi_status);
2136 }
2137 /*
2138 * KG: Oops again. Same thinko as above: The SCSI might have been
2139 * faster than the DMA engine, so that it ran out of data.
2140 * In that case, we have to do just nothing!
2141 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2142 */
2143 /*
2144 * KG: This is nonsense: We have been WRITING data to the bus
2145 * If the SCSI engine has no bytes left, how should the DMA engine?
2146 */
2147 if (d_left_counter == 0) {
2148 srb->total_xfer_length = 0;
2149 } else {
2150 /*
2151 * if transfer not yet complete
2152 * there were some data residue in SCSI FIFO or
2153 * SCSI transfer counter not empty
2154 */
2155 long oldxferred =
2156 srb->total_xfer_length - d_left_counter;
2157 const int diff =
2158 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2159 sg_update_list(srb, d_left_counter);
2160 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2161 if ((srb->segment_x[srb->sg_index].length ==
2162 diff && srb->cmd->use_sg)
2163 || ((oldxferred & ~PAGE_MASK) ==
2164 (PAGE_SIZE - diff))
2165 ) {
2166 dprintkl(KERN_INFO, "data_out_phase0: "
2167 "Work around chip bug (%i)?\n", diff);
2168 d_left_counter =
2169 srb->total_xfer_length - diff;
2170 sg_update_list(srb, d_left_counter);
2171 /*srb->total_xfer_length -= diff; */
2172 /*srb->virt_addr += diff; */
2173 /*if (srb->cmd->use_sg) */
2174 /* srb->sg_index++; */
2175 }
2176 }
2177 }
2178 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2179 cleanup_after_transfer(acb, srb);
2180 }
2181 }
2182
2183
2184 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2185 u16 *pscsi_status)
2186 {
2187 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
2188 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2189 clear_fifo(acb, "data_out_phase1");
2190 /* do prepare before transfer when data out phase */
2191 data_io_transfer(acb, srb, XFERDATAOUT);
2192 }
2193
2194 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2195 u16 *pscsi_status)
2196 {
2197 u16 scsi_status = *pscsi_status;
2198
2199 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
2200 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2201
2202 /*
2203 * KG: DataIn is much more tricky than DataOut. When the device is finished
2204 * and switches to another phase, the SCSI engine should be finished too.
2205 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2206 * engine and transferred to memory.
2207 * We should wait for the FIFOs to be emptied by that (is there any way to
2208 * enforce this?) and then stop the DMA engine, because it might think, that
2209 * there are more bytes to follow. Yes, the device might disconnect prior to
2210 * having all bytes transferred!
2211 * Also we should make sure that all data from the DMA engine buffer's really
2212 * made its way to the system memory! Some documentation on this would not
2213 * seem to be a bad idea, actually.
2214 */
2215 if (!(srb->state & SRB_XFERPAD)) {
2216 u32 d_left_counter;
2217 unsigned int sc, fc;
2218
2219 if (scsi_status & PARITYERROR) {
2220 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
2221 "Parity Error\n", srb->cmd->pid);
2222 srb->status |= PARITY_ERROR;
2223 }
2224 /*
2225 * KG: We should wait for the DMA FIFO to be empty ...
2226 * but: it would be better to wait first for the SCSI FIFO and then the
2227 * the DMA FIFO to become empty? How do we know, that the device not already
2228 * sent data to the FIFO in a MsgIn phase, eg.?
2229 */
2230 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2231 #if 0
2232 int ctr = 6000000;
2233 dprintkl(KERN_DEBUG,
2234 "DIP0: Wait for DMA FIFO to flush ...\n");
2235 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2236 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2237 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2238 while (!
2239 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2240 0x80) && --ctr);
2241 if (ctr < 6000000 - 1)
2242 dprintkl(KERN_DEBUG
2243 "DIP0: Had to wait for DMA ...\n");
2244 if (!ctr)
2245 dprintkl(KERN_ERR,
2246 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2247 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2248 #endif
2249 dprintkdbg(DBG_KG, "data_in_phase0: "
2250 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2251 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2252 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2253 }
2254 /* Now: Check remainig data: The SCSI counters should tell us ... */
2255 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2256 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2257 d_left_counter = sc + ((fc & 0x1f)
2258 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2259 0));
2260 dprintkdbg(DBG_KG, "data_in_phase0: "
2261 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2262 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2263 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2264 fc,
2265 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2266 sc,
2267 fc,
2268 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2269 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2270 srb->total_xfer_length, d_left_counter);
2271 #if DC395x_LASTPIO
2272 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
2273 if (d_left_counter
2274 && srb->total_xfer_length <= DC395x_LASTPIO) {
2275 size_t left_io = srb->total_xfer_length;
2276
2277 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2278 /*sg_update_list (srb, d_left_counter); */
2279 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2280 "for remaining %i bytes:",
2281 fc & 0x1f,
2282 (srb->dcb->sync_period & WIDE_SYNC) ?
2283 "words" : "bytes",
2284 srb->total_xfer_length);
2285 if (srb->dcb->sync_period & WIDE_SYNC)
2286 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2287 CFG2_WIDEFIFO);
2288 while (left_io) {
2289 unsigned char *virt, *base = NULL;
2290 unsigned long flags = 0;
2291 size_t len = left_io;
2292
2293 if (srb->cmd->use_sg) {
2294 size_t offset = srb->request_length - left_io;
2295 local_irq_save(flags);
2296 /* Assumption: it's inside one page as it's at most 4 bytes and
2297 I just assume it's on a 4-byte boundary */
2298 base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
2299 srb->sg_count, &offset, &len);
2300 virt = base + offset;
2301 } else {
2302 virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
2303 len = left_io;
2304 }
2305 left_io -= len;
2306
2307 while (len) {
2308 u8 byte;
2309 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2310 *virt++ = byte;
2311
2312 if (debug_enabled(DBG_PIO))
2313 printk(" %02x", byte);
2314
2315 d_left_counter--;
2316 sg_subtract_one(srb);
2317
2318 len--;
2319
2320 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2321
2322 if (fc == 0x40) {
2323 left_io = 0;
2324 break;
2325 }
2326 }
2327
2328 WARN_ON((fc != 0x40) == !d_left_counter);
2329
2330 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2331 /* Read the last byte ... */
2332 if (srb->total_xfer_length > 0) {
2333 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2334
2335 *virt++ = byte;
2336 srb->total_xfer_length--;
2337 if (debug_enabled(DBG_PIO))
2338 printk(" %02x", byte);
2339 }
2340
2341 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2342 }
2343
2344 if (srb->cmd->use_sg) {
2345 scsi_kunmap_atomic_sg(base);
2346 local_irq_restore(flags);
2347 }
2348 }
2349 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2350 /*srb->total_xfer_length = 0; */
2351 if (debug_enabled(DBG_PIO))
2352 printk("\n");
2353 }
2354 #endif /* DC395x_LASTPIO */
2355
2356 #if 0
2357 /*
2358 * KG: This was in DATAOUT. Does it also belong here?
2359 * Nobody seems to know what counter and fifo_cnt count exactly ...
2360 */
2361 if (!(scsi_status & SCSIXFERDONE)) {
2362 /*
2363 * when data transfer from DMA FIFO to SCSI FIFO
2364 * if there was some data left in SCSI FIFO
2365 */
2366 d_left_counter =
2367 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2368 0x1F);
2369 if (srb->dcb->sync_period & WIDE_SYNC)
2370 d_left_counter <<= 1;
2371 /*
2372 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2373 * so need to *= 2
2374 * KG: Seems to be correct ...
2375 */
2376 }
2377 #endif
2378 /* KG: This should not be needed any more! */
2379 if (d_left_counter == 0
2380 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2381 #if 0
2382 int ctr = 6000000;
2383 u8 TempDMAstatus;
2384 do {
2385 TempDMAstatus =
2386 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2387 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2388 if (!ctr)
2389 dprintkl(KERN_ERR,
2390 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2391 srb->total_xfer_length = 0;
2392 #endif
2393 srb->total_xfer_length = d_left_counter;
2394 } else { /* phase changed */
2395 /*
2396 * parsing the case:
2397 * when a transfer not yet complete
2398 * but be disconnected by target
2399 * if transfer not yet complete
2400 * there were some data residue in SCSI FIFO or
2401 * SCSI transfer counter not empty
2402 */
2403 sg_update_list(srb, d_left_counter);
2404 }
2405 }
2406 /* KG: The target may decide to disconnect: Empty FIFO before! */
2407 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2408 cleanup_after_transfer(acb, srb);
2409 }
2410 }
2411
2412
2413 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2414 u16 *pscsi_status)
2415 {
2416 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
2417 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2418 data_io_transfer(acb, srb, XFERDATAIN);
2419 }
2420
2421
2422 static void data_io_transfer(struct AdapterCtlBlk *acb,
2423 struct ScsiReqBlk *srb, u16 io_dir)
2424 {
2425 struct DeviceCtlBlk *dcb = srb->dcb;
2426 u8 bval;
2427 dprintkdbg(DBG_0,
2428 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2429 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
2430 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2431 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2432 if (srb == acb->tmp_srb)
2433 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2434 if (srb->sg_index >= srb->sg_count) {
2435 /* can't happen? out of bounds error */
2436 return;
2437 }
2438
2439 if (srb->total_xfer_length > DC395x_LASTPIO) {
2440 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2441 /*
2442 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2443 * Maybe, even ABORTXFER would be appropriate
2444 */
2445 if (dma_status & XFERPENDING) {
2446 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2447 "Expect trouble!\n");
2448 dump_register_info(acb, dcb, srb);
2449 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2450 }
2451 /* clear_fifo(acb, "IO"); */
2452 /*
2453 * load what physical address of Scatter/Gather list table
2454 * want to be transfer
2455 */
2456 srb->state |= SRB_DATA_XFER;
2457 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2458 if (srb->cmd->use_sg) { /* with S/G */
2459 io_dir |= DMACMD_SG;
2460 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2461 srb->sg_bus_addr +
2462 sizeof(struct SGentry) *
2463 srb->sg_index);
2464 /* load how many bytes in the sg list table */
2465 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2466 ((u32)(srb->sg_count -
2467 srb->sg_index) << 3));
2468 } else { /* without S/G */
2469 io_dir &= ~DMACMD_SG;
2470 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2471 srb->segment_x[0].address);
2472 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2473 srb->segment_x[0].length);
2474 }
2475 /* load total transfer length (24bits) max value 16Mbyte */
2476 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2477 srb->total_xfer_length);
2478 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2479 if (io_dir & DMACMD_DIR) { /* read */
2480 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2481 SCMD_DMA_IN);
2482 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2483 } else {
2484 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2485 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2486 SCMD_DMA_OUT);
2487 }
2488
2489 }
2490 #if DC395x_LASTPIO
2491 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2492 /*
2493 * load what physical address of Scatter/Gather list table
2494 * want to be transfer
2495 */
2496 srb->state |= SRB_DATA_XFER;
2497 /* load total transfer length (24bits) max value 16Mbyte */
2498 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2499 srb->total_xfer_length);
2500 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2501 if (io_dir & DMACMD_DIR) { /* read */
2502 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2503 SCMD_FIFO_IN);
2504 } else { /* write */
2505 int ln = srb->total_xfer_length;
2506 size_t left_io = srb->total_xfer_length;
2507
2508 if (srb->dcb->sync_period & WIDE_SYNC)
2509 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2510 CFG2_WIDEFIFO);
2511
2512 while (left_io) {
2513 unsigned char *virt, *base = NULL;
2514 unsigned long flags = 0;
2515 size_t len = left_io;
2516
2517 if (srb->cmd->use_sg) {
2518 size_t offset = srb->request_length - left_io;
2519 local_irq_save(flags);
2520 /* Again, max 4 bytes */
2521 base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
2522 srb->sg_count, &offset, &len);
2523 virt = base + offset;
2524 } else {
2525 virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
2526 len = left_io;
2527 }
2528 left_io -= len;
2529
2530 while (len--) {
2531 if (debug_enabled(DBG_PIO))
2532 printk(" %02x", *virt);
2533
2534 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2535
2536 sg_subtract_one(srb);
2537 }
2538
2539 if (srb->cmd->use_sg) {
2540 scsi_kunmap_atomic_sg(base);
2541 local_irq_restore(flags);
2542 }
2543 }
2544 if (srb->dcb->sync_period & WIDE_SYNC) {
2545 if (ln % 2) {
2546 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2547 if (debug_enabled(DBG_PIO))
2548 printk(" |00");
2549 }
2550 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2551 }
2552 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2553 if (debug_enabled(DBG_PIO))
2554 printk("\n");
2555 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2556 SCMD_FIFO_OUT);
2557 }
2558 }
2559 #endif /* DC395x_LASTPIO */
2560 else { /* xfer pad */
2561 u8 data = 0, data2 = 0;
2562 if (srb->sg_count) {
2563 srb->adapter_status = H_OVER_UNDER_RUN;
2564 srb->status |= OVER_RUN;
2565 }
2566 /*
2567 * KG: despite the fact that we are using 16 bits I/O ops
2568 * the SCSI FIFO is only 8 bits according to the docs
2569 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2570 */
2571 if (dcb->sync_period & WIDE_SYNC) {
2572 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2573 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2574 CFG2_WIDEFIFO);
2575 if (io_dir & DMACMD_DIR) {
2576 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2577 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2578 } else {
2579 /* Danger, Robinson: If you find KGs
2580 * scattered over the wide disk, the driver
2581 * or chip is to blame :-( */
2582 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2583 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2584 }
2585 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2586 } else {
2587 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2588 /* Danger, Robinson: If you find a collection of Ks on your disk
2589 * something broke :-( */
2590 if (io_dir & DMACMD_DIR)
2591 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2592 else
2593 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2594 }
2595 srb->state |= SRB_XFERPAD;
2596 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2597 /* SCSI command */
2598 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2599 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2600 }
2601 }
2602
2603
2604 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2605 u16 *pscsi_status)
2606 {
2607 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
2608 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2609 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2610 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2611 srb->state = SRB_COMPLETED;
2612 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2613 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2614 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2615 }
2616
2617
2618 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2619 u16 *pscsi_status)
2620 {
2621 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
2622 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2623 srb->state = SRB_STATUS;
2624 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2625 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2626 }
2627
2628
2629 /* Check if the message is complete */
2630 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2631 {
2632 if (*msgbuf == EXTENDED_MESSAGE) {
2633 if (len < 2)
2634 return 0;
2635 if (len < msgbuf[1] + 2)
2636 return 0;
2637 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2638 if (len < 2)
2639 return 0;
2640 return 1;
2641 }
2642
2643 /* reject_msg */
2644 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2645 struct ScsiReqBlk *srb)
2646 {
2647 srb->msgout_buf[0] = MESSAGE_REJECT;
2648 srb->msg_count = 1;
2649 DC395x_ENABLE_MSGOUT;
2650 srb->state &= ~SRB_MSGIN;
2651 srb->state |= SRB_MSGOUT;
2652 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2653 srb->msgin_buf[0],
2654 srb->dcb->target_id, srb->dcb->target_lun);
2655 }
2656
2657
2658 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2659 struct DeviceCtlBlk *dcb, u8 tag)
2660 {
2661 struct ScsiReqBlk *srb = NULL;
2662 struct ScsiReqBlk *i;
2663 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
2664 srb->cmd->pid, tag, srb);
2665
2666 if (!(dcb->tag_mask & (1 << tag)))
2667 dprintkl(KERN_DEBUG,
2668 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2669 dcb->tag_mask, tag);
2670
2671 if (list_empty(&dcb->srb_going_list))
2672 goto mingx0;
2673 list_for_each_entry(i, &dcb->srb_going_list, list) {
2674 if (i->tag_number == tag) {
2675 srb = i;
2676 break;
2677 }
2678 }
2679 if (!srb)
2680 goto mingx0;
2681
2682 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
2683 srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun);
2684 if (dcb->flag & ABORT_DEV_) {
2685 /*srb->state = SRB_ABORT_SENT; */
2686 enable_msgout_abort(acb, srb);
2687 }
2688
2689 if (!(srb->state & SRB_DISCONNECT))
2690 goto mingx0;
2691
2692 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2693 srb->state |= dcb->active_srb->state;
2694 srb->state |= SRB_DATA_XFER;
2695 dcb->active_srb = srb;
2696 /* How can we make the DORS happy? */
2697 return srb;
2698
2699 mingx0:
2700 srb = acb->tmp_srb;
2701 srb->state = SRB_UNEXPECT_RESEL;
2702 dcb->active_srb = srb;
2703 srb->msgout_buf[0] = MSG_ABORT_TAG;
2704 srb->msg_count = 1;
2705 DC395x_ENABLE_MSGOUT;
2706 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2707 return srb;
2708 }
2709
2710
2711 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2712 struct DeviceCtlBlk *dcb)
2713 {
2714 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2715 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2716 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2717 set_xfer_rate(acb, dcb);
2718 }
2719
2720
2721 /* set async transfer mode */
2722 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2723 {
2724 struct DeviceCtlBlk *dcb = srb->dcb;
2725 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2726 dcb->target_id, dcb->target_lun);
2727
2728 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2729 dcb->sync_mode |= SYNC_NEGO_DONE;
2730 /*dcb->sync_period &= 0; */
2731 dcb->sync_offset = 0;
2732 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2733 srb->state &= ~SRB_DO_SYNC_NEGO;
2734 reprogram_regs(acb, dcb);
2735 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2736 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2737 build_wdtr(acb, dcb, srb);
2738 DC395x_ENABLE_MSGOUT;
2739 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2740 }
2741 }
2742
2743
2744 /* set sync transfer mode */
2745 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2746 {
2747 struct DeviceCtlBlk *dcb = srb->dcb;
2748 u8 bval;
2749 int fact;
2750 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2751 "(%02i.%01i MHz) Offset %i\n",
2752 dcb->target_id, srb->msgin_buf[3] << 2,
2753 (250 / srb->msgin_buf[3]),
2754 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2755 srb->msgin_buf[4]);
2756
2757 if (srb->msgin_buf[4] > 15)
2758 srb->msgin_buf[4] = 15;
2759 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2760 dcb->sync_offset = 0;
2761 else if (dcb->sync_offset == 0)
2762 dcb->sync_offset = srb->msgin_buf[4];
2763 if (srb->msgin_buf[4] > dcb->sync_offset)
2764 srb->msgin_buf[4] = dcb->sync_offset;
2765 else
2766 dcb->sync_offset = srb->msgin_buf[4];
2767 bval = 0;
2768 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2769 || dcb->min_nego_period >
2770 clock_period[bval]))
2771 bval++;
2772 if (srb->msgin_buf[3] < clock_period[bval])
2773 dprintkl(KERN_INFO,
2774 "msgin_set_sync: Increase sync nego period to %ins\n",
2775 clock_period[bval] << 2);
2776 srb->msgin_buf[3] = clock_period[bval];
2777 dcb->sync_period &= 0xf0;
2778 dcb->sync_period |= ALT_SYNC | bval;
2779 dcb->min_nego_period = srb->msgin_buf[3];
2780
2781 if (dcb->sync_period & WIDE_SYNC)
2782 fact = 500;
2783 else
2784 fact = 250;
2785
2786 dprintkl(KERN_INFO,
2787 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2788 dcb->target_id, (fact == 500) ? "Wide16" : "",
2789 dcb->min_nego_period << 2, dcb->sync_offset,
2790 (fact / dcb->min_nego_period),
2791 ((fact % dcb->min_nego_period) * 10 +
2792 dcb->min_nego_period / 2) / dcb->min_nego_period);
2793
2794 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2795 /* Reply with corrected SDTR Message */
2796 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2797 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2798
2799 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2800 srb->msg_count = 5;
2801 DC395x_ENABLE_MSGOUT;
2802 dcb->sync_mode |= SYNC_NEGO_DONE;
2803 } else {
2804 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2805 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2806 build_wdtr(acb, dcb, srb);
2807 DC395x_ENABLE_MSGOUT;
2808 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2809 }
2810 }
2811 srb->state &= ~SRB_DO_SYNC_NEGO;
2812 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2813
2814 reprogram_regs(acb, dcb);
2815 }
2816
2817
2818 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2819 struct ScsiReqBlk *srb)
2820 {
2821 struct DeviceCtlBlk *dcb = srb->dcb;
2822 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2823
2824 dcb->sync_period &= ~WIDE_SYNC;
2825 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2826 dcb->sync_mode |= WIDE_NEGO_DONE;
2827 srb->state &= ~SRB_DO_WIDE_NEGO;
2828 reprogram_regs(acb, dcb);
2829 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2830 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2831 build_sdtr(acb, dcb, srb);
2832 DC395x_ENABLE_MSGOUT;
2833 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2834 }
2835 }
2836
2837 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2838 {
2839 struct DeviceCtlBlk *dcb = srb->dcb;
2840 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2841 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2842 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2843
2844 if (srb->msgin_buf[3] > wide)
2845 srb->msgin_buf[3] = wide;
2846 /* Completed */
2847 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2848 dprintkl(KERN_DEBUG,
2849 "msgin_set_wide: Wide nego initiated <%02i>\n",
2850 dcb->target_id);
2851 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2852 srb->msg_count = 4;
2853 srb->state |= SRB_DO_WIDE_NEGO;
2854 DC395x_ENABLE_MSGOUT;
2855 }
2856
2857 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2858 if (srb->msgin_buf[3] > 0)
2859 dcb->sync_period |= WIDE_SYNC;
2860 else
2861 dcb->sync_period &= ~WIDE_SYNC;
2862 srb->state &= ~SRB_DO_WIDE_NEGO;
2863 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2864 dprintkdbg(DBG_1,
2865 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2866 (8 << srb->msgin_buf[3]), dcb->target_id);
2867 reprogram_regs(acb, dcb);
2868 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2869 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2870 build_sdtr(acb, dcb, srb);
2871 DC395x_ENABLE_MSGOUT;
2872 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2873 }
2874 }
2875
2876
2877 /*
2878 * extended message codes:
2879 *
2880 * code description
2881 *
2882 * 02h Reserved
2883 * 00h MODIFY DATA POINTER
2884 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2885 * 03h WIDE DATA TRANSFER REQUEST
2886 * 04h - 7Fh Reserved
2887 * 80h - FFh Vendor specific
2888 */
2889 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2890 u16 *pscsi_status)
2891 {
2892 struct DeviceCtlBlk *dcb = acb->active_dcb;
2893 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid);
2894
2895 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2896 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2897 /* Now eval the msg */
2898 switch (srb->msgin_buf[0]) {
2899 case DISCONNECT:
2900 srb->state = SRB_DISCONNECT;
2901 break;
2902
2903 case SIMPLE_QUEUE_TAG:
2904 case HEAD_OF_QUEUE_TAG:
2905 case ORDERED_QUEUE_TAG:
2906 srb =
2907 msgin_qtag(acb, dcb,
2908 srb->msgin_buf[1]);
2909 break;
2910
2911 case MESSAGE_REJECT:
2912 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2913 DO_CLRATN | DO_DATALATCH);
2914 /* A sync nego message was rejected ! */
2915 if (srb->state & SRB_DO_SYNC_NEGO) {
2916 msgin_set_async(acb, srb);
2917 break;
2918 }
2919 /* A wide nego message was rejected ! */
2920 if (srb->state & SRB_DO_WIDE_NEGO) {
2921 msgin_set_nowide(acb, srb);
2922 break;
2923 }
2924 enable_msgout_abort(acb, srb);
2925 /*srb->state |= SRB_ABORT_SENT */
2926 break;
2927
2928 case EXTENDED_MESSAGE:
2929 /* SDTR */
2930 if (srb->msgin_buf[1] == 3
2931 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2932 msgin_set_sync(acb, srb);
2933 break;
2934 }
2935 /* WDTR */
2936 if (srb->msgin_buf[1] == 2
2937 && srb->msgin_buf[2] == EXTENDED_WDTR
2938 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2939 msgin_set_wide(acb, srb);
2940 break;
2941 }
2942 msgin_reject(acb, srb);
2943 break;
2944
2945 case MSG_IGNOREWIDE:
2946 /* Discard wide residual */
2947 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2948 break;
2949
2950 case COMMAND_COMPLETE:
2951 /* nothing has to be done */
2952 break;
2953
2954 case SAVE_POINTERS:
2955 /*
2956 * SAVE POINTER may be ignored as we have the struct
2957 * ScsiReqBlk* associated with the scsi command.
2958 */
2959 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2960 "SAVE POINTER rem=%i Ignore\n",
2961 srb->cmd->pid, srb->total_xfer_length);
2962 break;
2963
2964 case RESTORE_POINTERS:
2965 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2966 break;
2967
2968 case ABORT:
2969 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2970 "<%02i-%i> ABORT msg\n",
2971 srb->cmd->pid, dcb->target_id,
2972 dcb->target_lun);
2973 dcb->flag |= ABORT_DEV_;
2974 enable_msgout_abort(acb, srb);
2975 break;
2976
2977 default:
2978 /* reject unknown messages */
2979 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2980 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2981 srb->msg_count = 1;
2982 srb->msgout_buf[0] = dcb->identify_msg;
2983 DC395x_ENABLE_MSGOUT;
2984 srb->state |= SRB_MSGOUT;
2985 /*break; */
2986 }
2987 msgin_reject(acb, srb);
2988 }
2989
2990 /* Clear counter and MsgIn state */
2991 srb->state &= ~SRB_MSGIN;
2992 acb->msg_len = 0;
2993 }
2994 *pscsi_status = PH_BUS_FREE;
2995 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2996 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2997 }
2998
2999
3000 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3001 u16 *pscsi_status)
3002 {
3003 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid);
3004 clear_fifo(acb, "msgin_phase1");
3005 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
3006 if (!(srb->state & SRB_MSGIN)) {
3007 srb->state &= ~SRB_DISCONNECT;
3008 srb->state |= SRB_MSGIN;
3009 }
3010 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3011 /* SCSI command */
3012 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
3013 }
3014
3015
3016 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3017 u16 *pscsi_status)
3018 {
3019 }
3020
3021
3022 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3023 u16 *pscsi_status)
3024 {
3025 }
3026
3027
3028 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3029 {
3030 struct DeviceCtlBlk *i;
3031
3032 /* set all lun device's period, offset */
3033 if (dcb->identify_msg & 0x07)
3034 return;
3035
3036 if (acb->scan_devices) {
3037 current_sync_offset = dcb->sync_offset;
3038 return;
3039 }
3040
3041 list_for_each_entry(i, &acb->dcb_list, list)
3042 if (i->target_id == dcb->target_id) {
3043 i->sync_period = dcb->sync_period;
3044 i->sync_offset = dcb->sync_offset;
3045 i->sync_mode = dcb->sync_mode;
3046 i->min_nego_period = dcb->min_nego_period;
3047 }
3048 }
3049
3050
3051 static void disconnect(struct AdapterCtlBlk *acb)
3052 {
3053 struct DeviceCtlBlk *dcb = acb->active_dcb;
3054 struct ScsiReqBlk *srb;
3055
3056 if (!dcb) {
3057 dprintkl(KERN_ERR, "disconnect: No such device\n");
3058 udelay(500);
3059 /* Suspend queue for a while */
3060 acb->scsi_host->last_reset =
3061 jiffies + HZ / 2 +
3062 HZ * acb->eeprom.delay_time;
3063 clear_fifo(acb, "disconnectEx");
3064 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3065 return;
3066 }
3067 srb = dcb->active_srb;
3068 acb->active_dcb = NULL;
3069 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid);
3070
3071 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3072 clear_fifo(acb, "disconnect");
3073 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3074 if (srb->state & SRB_UNEXPECT_RESEL) {
3075 dprintkl(KERN_ERR,
3076 "disconnect: Unexpected reselection <%02i-%i>\n",
3077 dcb->target_id, dcb->target_lun);
3078 srb->state = 0;
3079 waiting_process_next(acb);
3080 } else if (srb->state & SRB_ABORT_SENT) {
3081 dcb->flag &= ~ABORT_DEV_;
3082 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3083 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3084 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3085 waiting_process_next(acb);
3086 } else {
3087 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3088 || !(srb->
3089 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3090 /*
3091 * Selection time out
3092 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3093 */
3094 /* Unexp. Disc / Sel Timeout */
3095 if (srb->state != SRB_START_
3096 && srb->state != SRB_MSGOUT) {
3097 srb->state = SRB_READY;
3098 dprintkl(KERN_DEBUG,
3099 "disconnect: (pid#%li) Unexpected\n",
3100 srb->cmd->pid);
3101 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3102 goto disc1;
3103 } else {
3104 /* Normal selection timeout */
3105 dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
3106 "<%02i-%i> SelTO\n", srb->cmd->pid,
3107 dcb->target_id, dcb->target_lun);
3108 if (srb->retry_count++ > DC395x_MAX_RETRIES
3109 || acb->scan_devices) {
3110 srb->target_status =
3111 SCSI_STAT_SEL_TIMEOUT;
3112 goto disc1;
3113 }
3114 free_tag(dcb, srb);
3115 srb_going_to_waiting_move(dcb, srb);
3116 dprintkdbg(DBG_KG,
3117 "disconnect: (pid#%li) Retry\n",
3118 srb->cmd->pid);
3119 waiting_set_timer(acb, HZ / 20);
3120 }
3121 } else if (srb->state & SRB_DISCONNECT) {
3122 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3123 /*
3124 * SRB_DISCONNECT (This is what we expect!)
3125 */
3126 if (bval & 0x40) {
3127 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3128 " 0x%02x: ACK set! Other controllers?\n",
3129 bval);
3130 /* It could come from another initiator, therefore don't do much ! */
3131 } else
3132 waiting_process_next(acb);
3133 } else if (srb->state & SRB_COMPLETED) {
3134 disc1:
3135 /*
3136 ** SRB_COMPLETED
3137 */
3138 free_tag(dcb, srb);
3139 dcb->active_srb = NULL;
3140 srb->state = SRB_FREE;
3141 srb_done(acb, dcb, srb);
3142 }
3143 }
3144 }
3145
3146
3147 static void reselect(struct AdapterCtlBlk *acb)
3148 {
3149 struct DeviceCtlBlk *dcb = acb->active_dcb;
3150 struct ScsiReqBlk *srb = NULL;
3151 u16 rsel_tar_lun_id;
3152 u8 id, lun;
3153 u8 arblostflag = 0;
3154 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3155
3156 clear_fifo(acb, "reselect");
3157 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3158 /* Read Reselected Target ID and LUN */
3159 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3160 if (dcb) { /* Arbitration lost but Reselection win */
3161 srb = dcb->active_srb;
3162 if (!srb) {
3163 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3164 "but active_srb == NULL\n");
3165 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3166 return;
3167 }
3168 /* Why the if ? */
3169 if (!acb->scan_devices) {
3170 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
3171 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3172 srb->cmd->pid, dcb->target_id,
3173 dcb->target_lun, rsel_tar_lun_id,
3174 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3175 arblostflag = 1;
3176 /*srb->state |= SRB_DISCONNECT; */
3177
3178 srb->state = SRB_READY;
3179 free_tag(dcb, srb);
3180 srb_going_to_waiting_move(dcb, srb);
3181 waiting_set_timer(acb, HZ / 20);
3182
3183 /* return; */
3184 }
3185 }
3186 /* Read Reselected Target Id and LUN */
3187 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3188 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3189 "Got %i!\n", rsel_tar_lun_id);
3190 id = rsel_tar_lun_id & 0xff;
3191 lun = (rsel_tar_lun_id >> 8) & 7;
3192 dcb = find_dcb(acb, id, lun);
3193 if (!dcb) {
3194 dprintkl(KERN_ERR, "reselect: From non existent device "
3195 "<%02i-%i>\n", id, lun);
3196 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3197 return;
3198 }
3199 acb->active_dcb = dcb;
3200
3201 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3202 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3203 "disconnection? <%02i-%i>\n",
3204 dcb->target_id, dcb->target_lun);
3205
3206 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3207 srb = acb->tmp_srb;
3208 dcb->active_srb = srb;
3209 } else {
3210 /* There can be only one! */
3211 srb = dcb->active_srb;
3212 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3213 /*
3214 * abort command
3215 */
3216 dprintkl(KERN_DEBUG,
3217 "reselect: w/o disconnected cmds <%02i-%i>\n",
3218 dcb->target_id, dcb->target_lun);
3219 srb = acb->tmp_srb;
3220 srb->state = SRB_UNEXPECT_RESEL;
3221 dcb->active_srb = srb;
3222 enable_msgout_abort(acb, srb);
3223 } else {
3224 if (dcb->flag & ABORT_DEV_) {
3225 /*srb->state = SRB_ABORT_SENT; */
3226 enable_msgout_abort(acb, srb);
3227 } else
3228 srb->state = SRB_DATA_XFER;
3229
3230 }
3231 }
3232 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3233
3234 /* Program HA ID, target ID, period and offset */
3235 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3236 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3237 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3238 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3239 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3240 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3241 /* SCSI command */
3242 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3243 }
3244
3245
3246 static inline u8 tagq_blacklist(char *name)
3247 {
3248 #ifndef DC395x_NO_TAGQ
3249 #if 0
3250 u8 i;
3251 for (i = 0; i < BADDEVCNT; i++)
3252 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3253 return 1;
3254 #endif
3255 return 0;
3256 #else
3257 return 1;
3258 #endif
3259 }
3260
3261
3262 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3263 {
3264 /* Check for SCSI format (ANSI and Response data format) */
3265 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3266 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3267 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3268 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3269 /* ((dcb->dev_type == TYPE_DISK)
3270 || (dcb->dev_type == TYPE_MOD)) && */
3271 !tagq_blacklist(((char *)ptr) + 8)) {
3272 if (dcb->max_command == 1)
3273 dcb->max_command =
3274 dcb->acb->tag_max_num;
3275 dcb->sync_mode |= EN_TAG_QUEUEING;
3276 /*dcb->tag_mask = 0; */
3277 } else
3278 dcb->max_command = 1;
3279 }
3280 }
3281
3282
3283 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3284 struct ScsiInqData *ptr)
3285 {
3286 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3287 dcb->dev_type = bval1;
3288 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3289 disc_tagq_set(dcb, ptr);
3290 }
3291
3292
3293 /* unmap mapped pci regions from SRB */
3294 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3295 {
3296 struct scsi_cmnd *cmd = srb->cmd;
3297 enum dma_data_direction dir = cmd->sc_data_direction;
3298 if (cmd->use_sg && dir != PCI_DMA_NONE) {
3299 /* unmap DC395x SG list */
3300 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3301 srb->sg_bus_addr, SEGMENTX_LEN);
3302 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3303 SEGMENTX_LEN,
3304 PCI_DMA_TODEVICE);
3305 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3306 cmd->use_sg, cmd->request_buffer);
3307 /* unmap the sg segments */
3308 pci_unmap_sg(acb->dev,
3309 (struct scatterlist *)cmd->request_buffer,
3310 cmd->use_sg, dir);
3311 } else if (cmd->request_buffer && dir != PCI_DMA_NONE) {
3312 dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n",
3313 srb->segment_x[0].address, cmd->request_bufflen);
3314 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3315 cmd->request_bufflen, dir);
3316 }
3317 }
3318
3319
3320 /* unmap mapped pci sense buffer from SRB */
3321 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3322 struct ScsiReqBlk *srb)
3323 {
3324 if (!(srb->flag & AUTO_REQSENSE))
3325 return;
3326 /* Unmap sense buffer */
3327 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3328 srb->segment_x[0].address);
3329 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3330 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3331 /* Restore SG stuff */
3332 srb->total_xfer_length = srb->xferred;
3333 srb->segment_x[0].address =
3334 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3335 srb->segment_x[0].length =
3336 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3337 }
3338
3339
3340 /*
3341 * Complete execution of a SCSI command
3342 * Signal completion to the generic SCSI driver
3343 */
3344 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3345 struct ScsiReqBlk *srb)
3346 {
3347 u8 tempcnt, status;
3348 struct scsi_cmnd *cmd = srb->cmd;
3349 enum dma_data_direction dir = cmd->sc_data_direction;
3350 int ckc_only = 1;
3351
3352 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid,
3353 srb->cmd->device->id, srb->cmd->device->lun);
3354 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3355 srb, cmd->use_sg, srb->sg_index, srb->sg_count,
3356 cmd->request_buffer);
3357 status = srb->target_status;
3358 if (srb->flag & AUTO_REQSENSE) {
3359 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3360 pci_unmap_srb_sense(acb, srb);
3361 /*
3362 ** target status..........................
3363 */
3364 srb->flag &= ~AUTO_REQSENSE;
3365 srb->adapter_status = 0;
3366 srb->target_status = CHECK_CONDITION << 1;
3367 if (debug_enabled(DBG_1)) {
3368 switch (cmd->sense_buffer[2] & 0x0f) {
3369 case NOT_READY:
3370 dprintkl(KERN_DEBUG,
3371 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3372 cmd->cmnd[0], dcb->target_id,
3373 dcb->target_lun, status, acb->scan_devices);
3374 break;
3375 case UNIT_ATTENTION:
3376 dprintkl(KERN_DEBUG,
3377 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3378 cmd->cmnd[0], dcb->target_id,
3379 dcb->target_lun, status, acb->scan_devices);
3380 break;
3381 case ILLEGAL_REQUEST:
3382 dprintkl(KERN_DEBUG,
3383 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3384 cmd->cmnd[0], dcb->target_id,
3385 dcb->target_lun, status, acb->scan_devices);
3386 break;
3387 case MEDIUM_ERROR:
3388 dprintkl(KERN_DEBUG,
3389 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3390 cmd->cmnd[0], dcb->target_id,
3391 dcb->target_lun, status, acb->scan_devices);
3392 break;
3393 case HARDWARE_ERROR:
3394 dprintkl(KERN_DEBUG,
3395 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3396 cmd->cmnd[0], dcb->target_id,
3397 dcb->target_lun, status, acb->scan_devices);
3398 break;
3399 }
3400 if (cmd->sense_buffer[7] >= 6)
3401 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3402 "(0x%08x 0x%08x)\n",
3403 cmd->sense_buffer[2], cmd->sense_buffer[12],
3404 cmd->sense_buffer[13],
3405 *((unsigned int *)(cmd->sense_buffer + 3)),
3406 *((unsigned int *)(cmd->sense_buffer + 8)));
3407 else
3408 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3409 cmd->sense_buffer[2],
3410 *((unsigned int *)(cmd->sense_buffer + 3)));
3411 }
3412
3413 if (status == (CHECK_CONDITION << 1)) {
3414 cmd->result = DID_BAD_TARGET << 16;
3415 goto ckc_e;
3416 }
3417 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3418
3419 if (srb->total_xfer_length
3420 && srb->total_xfer_length >= cmd->underflow)
3421 cmd->result =
3422 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3423 srb->end_message, CHECK_CONDITION);
3424 /*SET_RES_DID(cmd->result,DID_OK) */
3425 else
3426 cmd->result =
3427 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3428 srb->end_message, CHECK_CONDITION);
3429
3430 goto ckc_e;
3431 }
3432
3433 /*************************************************************/
3434 if (status) {
3435 /*
3436 * target status..........................
3437 */
3438 if (status_byte(status) == CHECK_CONDITION) {
3439 request_sense(acb, dcb, srb);
3440 return;
3441 } else if (status_byte(status) == QUEUE_FULL) {
3442 tempcnt = (u8)list_size(&dcb->srb_going_list);
3443 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3444 dcb->target_id, dcb->target_lun, tempcnt);
3445 if (tempcnt > 1)
3446 tempcnt--;
3447 dcb->max_command = tempcnt;
3448 free_tag(dcb, srb);
3449 srb_going_to_waiting_move(dcb, srb);
3450 waiting_set_timer(acb, HZ / 20);
3451 srb->adapter_status = 0;
3452 srb->target_status = 0;
3453 return;
3454 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3455 srb->adapter_status = H_SEL_TIMEOUT;
3456 srb->target_status = 0;
3457 cmd->result = DID_NO_CONNECT << 16;
3458 } else {
3459 srb->adapter_status = 0;
3460 SET_RES_DID(cmd->result, DID_ERROR);
3461 SET_RES_MSG(cmd->result, srb->end_message);
3462 SET_RES_TARGET(cmd->result, status);
3463
3464 }
3465 } else {
3466 /*
3467 ** process initiator status..........................
3468 */
3469 status = srb->adapter_status;
3470 if (status & H_OVER_UNDER_RUN) {
3471 srb->target_status = 0;
3472 SET_RES_DID(cmd->result, DID_OK);
3473 SET_RES_MSG(cmd->result, srb->end_message);
3474 } else if (srb->status & PARITY_ERROR) {
3475 SET_RES_DID(cmd->result, DID_PARITY);
3476 SET_RES_MSG(cmd->result, srb->end_message);
3477 } else { /* No error */
3478
3479 srb->adapter_status = 0;
3480 srb->target_status = 0;
3481 SET_RES_DID(cmd->result, DID_OK);
3482 }
3483 }
3484
3485 if (dir != PCI_DMA_NONE) {
3486 if (cmd->use_sg)
3487 pci_dma_sync_sg_for_cpu(acb->dev,
3488 (struct scatterlist *)cmd->
3489 request_buffer, cmd->use_sg, dir);
3490 else if (cmd->request_buffer)
3491 pci_dma_sync_single_for_cpu(acb->dev,
3492 srb->segment_x[0].address,
3493 cmd->request_bufflen, dir);
3494 }
3495 ckc_only = 0;
3496 /* Check Error Conditions */
3497 ckc_e:
3498
3499 if (cmd->cmnd[0] == INQUIRY) {
3500 unsigned char *base = NULL;
3501 struct ScsiInqData *ptr;
3502 unsigned long flags = 0;
3503
3504 if (cmd->use_sg) {
3505 struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer;
3506 size_t offset = 0, len = sizeof(struct ScsiInqData);
3507
3508 local_irq_save(flags);
3509 base = scsi_kmap_atomic_sg(sg, cmd->use_sg, &offset, &len);
3510 ptr = (struct ScsiInqData *)(base + offset);
3511 } else
3512 ptr = (struct ScsiInqData *)(cmd->request_buffer);
3513
3514 if (!ckc_only && (cmd->result & RES_DID) == 0
3515 && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8
3516 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3517 dcb->inquiry7 = ptr->Flags;
3518
3519 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3520 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3521 if ((cmd->result == (DID_OK << 16)
3522 || status_byte(cmd->result) &
3523 CHECK_CONDITION)) {
3524 if (!dcb->init_tcq_flag) {
3525 add_dev(acb, dcb, ptr);
3526 dcb->init_tcq_flag = 1;
3527 }
3528 }
3529
3530 if (cmd->use_sg) {
3531 scsi_kunmap_atomic_sg(base);
3532 local_irq_restore(flags);
3533 }
3534 }
3535
3536 /* Here is the info for Doug Gilbert's sg3 ... */
3537 cmd->resid = srb->total_xfer_length;
3538 /* This may be interpreted by sb. or not ... */
3539 cmd->SCp.this_residual = srb->total_xfer_length;
3540 cmd->SCp.buffers_residual = 0;
3541 if (debug_enabled(DBG_KG)) {
3542 if (srb->total_xfer_length)
3543 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
3544 "cmnd=0x%02x Missed %i bytes\n",
3545 cmd->pid, cmd->device->id, cmd->device->lun,
3546 cmd->cmnd[0], srb->total_xfer_length);
3547 }
3548
3549 srb_going_remove(dcb, srb);
3550 /* Add to free list */
3551 if (srb == acb->tmp_srb)
3552 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3553 else {
3554 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
3555 cmd->pid, cmd->result);
3556 srb_free_insert(acb, srb);
3557 }
3558 pci_unmap_srb(acb, srb);
3559
3560 cmd->scsi_done(cmd);
3561 waiting_process_next(acb);
3562 }
3563
3564
3565 /* abort all cmds in our queues */
3566 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3567 struct scsi_cmnd *cmd, u8 force)
3568 {
3569 struct DeviceCtlBlk *dcb;
3570 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3571
3572 list_for_each_entry(dcb, &acb->dcb_list, list) {
3573 struct ScsiReqBlk *srb;
3574 struct ScsiReqBlk *tmp;
3575 struct scsi_cmnd *p;
3576
3577 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3578 enum dma_data_direction dir;
3579 int result;
3580
3581 p = srb->cmd;
3582 dir = p->sc_data_direction;
3583 result = MK_RES(0, did_flag, 0, 0);
3584 printk("G:%li(%02i-%i) ", p->pid,
3585 p->device->id, p->device->lun);
3586 srb_going_remove(dcb, srb);
3587 free_tag(dcb, srb);
3588 srb_free_insert(acb, srb);
3589 p->result = result;
3590 pci_unmap_srb_sense(acb, srb);
3591 pci_unmap_srb(acb, srb);
3592 if (force) {
3593 /* For new EH, we normally don't need to give commands back,
3594 * as they all complete or all time out */
3595 p->scsi_done(p);
3596 }
3597 }
3598 if (!list_empty(&dcb->srb_going_list))
3599 dprintkl(KERN_DEBUG,
3600 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3601 dcb->target_id, dcb->target_lun);
3602 if (dcb->tag_mask)
3603 dprintkl(KERN_DEBUG,
3604 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3605 dcb->target_id, dcb->target_lun,
3606 dcb->tag_mask);
3607
3608 /* Waiting queue */
3609 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3610 int result;
3611 p = srb->cmd;
3612
3613 result = MK_RES(0, did_flag, 0, 0);
3614 printk("W:%li<%02i-%i>", p->pid, p->device->id,
3615 p->device->lun);
3616 srb_waiting_remove(dcb, srb);
3617 srb_free_insert(acb, srb);
3618 p->result = result;
3619 pci_unmap_srb_sense(acb, srb);
3620 pci_unmap_srb(acb, srb);
3621 if (force) {
3622 /* For new EH, we normally don't need to give commands back,
3623 * as they all complete or all time out */
3624 cmd->scsi_done(cmd);
3625 }
3626 }
3627 if (!list_empty(&dcb->srb_waiting_list))
3628 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3629 list_size(&dcb->srb_waiting_list), dcb->target_id,
3630 dcb->target_lun);
3631 dcb->flag &= ~ABORT_DEV_;
3632 }
3633 printk("\n");
3634 }
3635
3636
3637 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3638 {
3639 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3640 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3641 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3642
3643 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3644 /* nothing */;
3645 }
3646
3647
3648 static void set_basic_config(struct AdapterCtlBlk *acb)
3649 {
3650 u8 bval;
3651 u16 wval;
3652 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3653 if (acb->config & HCC_PARITY)
3654 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3655 else
3656 bval = PHASELATCH | INITIATOR | BLOCKRST;
3657
3658 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3659
3660 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3661 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3662 /* program Host ID */
3663 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3664 /* set ansynchronous transfer */
3665 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3666 /* Turn LED control off */
3667 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3668 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3669 /* DMA config */
3670 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3671 wval |=
3672 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3673 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3674 /* Clear pending interrupt status */
3675 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3676 /* Enable SCSI interrupt */
3677 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3678 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3679 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3680 );
3681 }
3682
3683
3684 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3685 {
3686 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3687 /* delay half a second */
3688 if (timer_pending(&acb->waiting_timer))
3689 del_timer(&acb->waiting_timer);
3690
3691 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3692 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3693 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3694 udelay(500);
3695 /* Maybe we locked up the bus? Then lets wait even longer ... */
3696 acb->scsi_host->last_reset =
3697 jiffies + 5 * HZ / 2 +
3698 HZ * acb->eeprom.delay_time;
3699
3700 clear_fifo(acb, "scsi_reset_detect");
3701 set_basic_config(acb);
3702 /*1.25 */
3703 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3704
3705 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3706 acb->acb_flag |= RESET_DONE;
3707 } else {
3708 acb->acb_flag |= RESET_DETECT;
3709 reset_dev_param(acb);
3710 doing_srb_done(acb, DID_RESET, NULL, 1);
3711 /*DC395x_RecoverSRB( acb ); */
3712 acb->active_dcb = NULL;
3713 acb->acb_flag = 0;
3714 waiting_process_next(acb);
3715 }
3716 }
3717
3718
3719 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3720 struct ScsiReqBlk *srb)
3721 {
3722 struct scsi_cmnd *cmd = srb->cmd;
3723 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
3724 cmd->pid, cmd->device->id, cmd->device->lun);
3725
3726 srb->flag |= AUTO_REQSENSE;
3727 srb->adapter_status = 0;
3728 srb->target_status = 0;
3729
3730 /* KG: Can this prevent crap sense data ? */
3731 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
3732
3733 /* Save some data */
3734 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3735 srb->segment_x[0].address;
3736 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3737 srb->segment_x[0].length;
3738 srb->xferred = srb->total_xfer_length;
3739 /* srb->segment_x : a one entry of S/G list table */
3740 srb->total_xfer_length = sizeof(cmd->sense_buffer);
3741 srb->segment_x[0].length = sizeof(cmd->sense_buffer);
3742 /* Map sense buffer */
3743 srb->segment_x[0].address =
3744 pci_map_single(acb->dev, cmd->sense_buffer,
3745 sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE);
3746 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3747 cmd->sense_buffer, srb->segment_x[0].address,
3748 sizeof(cmd->sense_buffer));
3749 srb->sg_count = 1;
3750 srb->sg_index = 0;
3751
3752 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3753 dprintkl(KERN_DEBUG,
3754 "request_sense: (pid#%li) failed <%02i-%i>\n",
3755 srb->cmd->pid, dcb->target_id, dcb->target_lun);
3756 srb_going_to_waiting_move(dcb, srb);
3757 waiting_set_timer(acb, HZ / 100);
3758 }
3759 }
3760
3761
3762 /**
3763 * device_alloc - Allocate a new device instance. This create the
3764 * devices instance and sets up all the data items. The adapter
3765 * instance is required to obtain confiuration information for this
3766 * device. This does *not* add this device to the adapters device
3767 * list.
3768 *
3769 * @acb: The adapter to obtain configuration information from.
3770 * @target: The target for the new device.
3771 * @lun: The lun for the new device.
3772 *
3773 * Return the new device if successful or NULL on failure.
3774 **/
3775 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3776 u8 target, u8 lun)
3777 {
3778 struct NvRamType *eeprom = &acb->eeprom;
3779 u8 period_index = eeprom->target[target].period & 0x07;
3780 struct DeviceCtlBlk *dcb;
3781
3782 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3783 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3784 if (!dcb)
3785 return NULL;
3786 dcb->acb = NULL;
3787 INIT_LIST_HEAD(&dcb->srb_going_list);
3788 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3789 dcb->active_srb = NULL;
3790 dcb->tag_mask = 0;
3791 dcb->max_command = 1;
3792 dcb->target_id = target;
3793 dcb->target_lun = lun;
3794 #ifndef DC395x_NO_DISCONNECT
3795 dcb->identify_msg =
3796 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3797 #else
3798 dcb->identify_msg = IDENTIFY(0, lun);
3799 #endif
3800 dcb->dev_mode = eeprom->target[target].cfg0;
3801 dcb->inquiry7 = 0;
3802 dcb->sync_mode = 0;
3803 dcb->min_nego_period = clock_period[period_index];
3804 dcb->sync_period = 0;
3805 dcb->sync_offset = 0;
3806 dcb->flag = 0;
3807
3808 #ifndef DC395x_NO_WIDE
3809 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3810 && (acb->config & HCC_WIDE_CARD))
3811 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3812 #endif
3813 #ifndef DC395x_NO_SYNC
3814 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3815 if (!(lun) || current_sync_offset)
3816 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3817 #endif
3818 if (dcb->target_lun != 0) {
3819 /* Copy settings */
3820 struct DeviceCtlBlk *p;
3821 list_for_each_entry(p, &acb->dcb_list, list)
3822 if (p->target_id == dcb->target_id)
3823 break;
3824 dprintkdbg(DBG_1,
3825 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3826 dcb->target_id, dcb->target_lun,
3827 p->target_id, p->target_lun);
3828 dcb->sync_mode = p->sync_mode;
3829 dcb->sync_period = p->sync_period;
3830 dcb->min_nego_period = p->min_nego_period;
3831 dcb->sync_offset = p->sync_offset;
3832 dcb->inquiry7 = p->inquiry7;
3833 }
3834 return dcb;
3835 }
3836
3837
3838 /**
3839 * adapter_add_device - Adds the device instance to the adaptor instance.
3840 *
3841 * @acb: The adapter device to be updated
3842 * @dcb: A newly created and intialised device instance to add.
3843 **/
3844 static void adapter_add_device(struct AdapterCtlBlk *acb,
3845 struct DeviceCtlBlk *dcb)
3846 {
3847 /* backpointer to adapter */
3848 dcb->acb = acb;
3849
3850 /* set run_robin to this device if it is currently empty */
3851 if (list_empty(&acb->dcb_list))
3852 acb->dcb_run_robin = dcb;
3853
3854 /* add device to list */
3855 list_add_tail(&dcb->list, &acb->dcb_list);
3856
3857 /* update device maps */
3858 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3859 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3860 }
3861
3862
3863 /**
3864 * adapter_remove_device - Removes the device instance from the adaptor
3865 * instance. The device instance is not check in any way or freed by this.
3866 * The caller is expected to take care of that. This will simply remove the
3867 * device from the adapters data strcutures.
3868 *
3869 * @acb: The adapter device to be updated
3870 * @dcb: A device that has previously been added to the adapter.
3871 **/
3872 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3873 struct DeviceCtlBlk *dcb)
3874 {
3875 struct DeviceCtlBlk *i;
3876 struct DeviceCtlBlk *tmp;
3877 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3878 dcb->target_id, dcb->target_lun);
3879
3880 /* fix up any pointers to this device that we have in the adapter */
3881 if (acb->active_dcb == dcb)
3882 acb->active_dcb = NULL;
3883 if (acb->dcb_run_robin == dcb)
3884 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3885
3886 /* unlink from list */
3887 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3888 if (dcb == i) {
3889 list_del(&i->list);
3890 break;
3891 }
3892
3893 /* clear map and children */
3894 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3895 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3896 dcb->acb = NULL;
3897 }
3898
3899
3900 /**
3901 * adapter_remove_and_free_device - Removes a single device from the adapter
3902 * and then frees the device information.
3903 *
3904 * @acb: The adapter device to be updated
3905 * @dcb: A device that has previously been added to the adapter.
3906 */
3907 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3908 struct DeviceCtlBlk *dcb)
3909 {
3910 if (list_size(&dcb->srb_going_list) > 1) {
3911 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3912 "Won't remove because of %i active requests.\n",
3913 dcb->target_id, dcb->target_lun,
3914 list_size(&dcb->srb_going_list));
3915 return;
3916 }
3917 adapter_remove_device(acb, dcb);
3918 kfree(dcb);
3919 }
3920
3921
3922 /**
3923 * adapter_remove_and_free_all_devices - Removes and frees all of the
3924 * devices associated with the specified adapter.
3925 *
3926 * @acb: The adapter from which all devices should be removed.
3927 **/
3928 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3929 {
3930 struct DeviceCtlBlk *dcb;
3931 struct DeviceCtlBlk *tmp;
3932 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3933 list_size(&acb->dcb_list));
3934
3935 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3936 adapter_remove_and_free_device(acb, dcb);
3937 }
3938
3939
3940 /**
3941 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3942 * scsi device that we need to deal with. We allocate a new device and then
3943 * insert that device into the adapters device list.
3944 *
3945 * @scsi_device: The new scsi device that we need to handle.
3946 **/
3947 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3948 {
3949 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3950 struct DeviceCtlBlk *dcb;
3951
3952 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3953 if (!dcb)
3954 return -ENOMEM;
3955 adapter_add_device(acb, dcb);
3956
3957 return 0;
3958 }
3959
3960
3961 /**
3962 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3963 * device that is going away.
3964 *
3965 * @scsi_device: The new scsi device that we need to handle.
3966 **/
3967 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3968 {
3969 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3970 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3971 if (dcb)
3972 adapter_remove_and_free_device(acb, dcb);
3973 }
3974
3975
3976
3977
3978 /**
3979 * trms1040_wait_30us: wait for 30 us
3980 *
3981 * Waits for 30us (using the chip by the looks of it..)
3982 *
3983 * @io_port: base I/O address
3984 **/
3985 static void __devinit trms1040_wait_30us(unsigned long io_port)
3986 {
3987 /* ScsiPortStallExecution(30); wait 30 us */
3988 outb(5, io_port + TRM_S1040_GEN_TIMER);
3989 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3990 /* nothing */ ;
3991 }
3992
3993
3994 /**
3995 * trms1040_write_cmd - write the secified command and address to
3996 * chip
3997 *
3998 * @io_port: base I/O address
3999 * @cmd: SB + op code (command) to send
4000 * @addr: address to send
4001 **/
4002 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
4003 {
4004 int i;
4005 u8 send_data;
4006
4007 /* program SB + OP code */
4008 for (i = 0; i < 3; i++, cmd <<= 1) {
4009 send_data = NVR_SELECT;
4010 if (cmd & 0x04) /* Start from bit 2 */
4011 send_data |= NVR_BITOUT;
4012
4013 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4014 trms1040_wait_30us(io_port);
4015 outb((send_data | NVR_CLOCK),
4016 io_port + TRM_S1040_GEN_NVRAM);
4017 trms1040_wait_30us(io_port);
4018 }
4019
4020 /* send address */
4021 for (i = 0; i < 7; i++, addr <<= 1) {
4022 send_data = NVR_SELECT;
4023 if (addr & 0x40) /* Start from bit 6 */
4024 send_data |= NVR_BITOUT;
4025
4026 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4027 trms1040_wait_30us(io_port);
4028 outb((send_data | NVR_CLOCK),
4029 io_port + TRM_S1040_GEN_NVRAM);
4030 trms1040_wait_30us(io_port);
4031 }
4032 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4033 trms1040_wait_30us(io_port);
4034 }
4035
4036
4037 /**
4038 * trms1040_set_data - store a single byte in the eeprom
4039 *
4040 * Called from write all to write a single byte into the SSEEPROM
4041 * Which is done one bit at a time.
4042 *
4043 * @io_port: base I/O address
4044 * @addr: offset into EEPROM
4045 * @byte: bytes to write
4046 **/
4047 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4048 {
4049 int i;
4050 u8 send_data;
4051
4052 /* Send write command & address */
4053 trms1040_write_cmd(io_port, 0x05, addr);
4054
4055 /* Write data */
4056 for (i = 0; i < 8; i++, byte <<= 1) {
4057 send_data = NVR_SELECT;
4058 if (byte & 0x80) /* Start from bit 7 */
4059 send_data |= NVR_BITOUT;
4060
4061 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4062 trms1040_wait_30us(io_port);
4063 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4064 trms1040_wait_30us(io_port);
4065 }
4066 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4067 trms1040_wait_30us(io_port);
4068
4069 /* Disable chip select */
4070 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4071 trms1040_wait_30us(io_port);
4072
4073 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4074 trms1040_wait_30us(io_port);
4075
4076 /* Wait for write ready */
4077 while (1) {
4078 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4079 trms1040_wait_30us(io_port);
4080
4081 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4082 trms1040_wait_30us(io_port);
4083
4084 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4085 break;
4086 }
4087
4088 /* Disable chip select */
4089 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4090 }
4091
4092
4093 /**
4094 * trms1040_write_all - write 128 bytes to the eeprom
4095 *
4096 * Write the supplied 128 bytes to the chips SEEPROM
4097 *
4098 * @eeprom: the data to write
4099 * @io_port: the base io port
4100 **/
4101 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4102 {
4103 u8 *b_eeprom = (u8 *)eeprom;
4104 u8 addr;
4105
4106 /* Enable SEEPROM */
4107 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4108 io_port + TRM_S1040_GEN_CONTROL);
4109
4110 /* write enable */
4111 trms1040_write_cmd(io_port, 0x04, 0xFF);
4112 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4113 trms1040_wait_30us(io_port);
4114
4115 /* write */
4116 for (addr = 0; addr < 128; addr++, b_eeprom++)
4117 trms1040_set_data(io_port, addr, *b_eeprom);
4118
4119 /* write disable */
4120 trms1040_write_cmd(io_port, 0x04, 0x00);
4121 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4122 trms1040_wait_30us(io_port);
4123
4124 /* Disable SEEPROM */
4125 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4126 io_port + TRM_S1040_GEN_CONTROL);
4127 }
4128
4129
4130 /**
4131 * trms1040_get_data - get a single byte from the eeprom
4132 *
4133 * Called from read all to read a single byte into the SSEEPROM
4134 * Which is done one bit at a time.
4135 *
4136 * @io_port: base I/O address
4137 * @addr: offset into SEEPROM
4138 *
4139 * Returns the the byte read.
4140 **/
4141 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4142 {
4143 int i;
4144 u8 read_byte;
4145 u8 result = 0;
4146
4147 /* Send read command & address */
4148 trms1040_write_cmd(io_port, 0x06, addr);
4149
4150 /* read data */
4151 for (i = 0; i < 8; i++) {
4152 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4153 trms1040_wait_30us(io_port);
4154 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4155
4156 /* Get data bit while falling edge */
4157 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4158 result <<= 1;
4159 if (read_byte & NVR_BITIN)
4160 result |= 1;
4161
4162 trms1040_wait_30us(io_port);
4163 }
4164
4165 /* Disable chip select */
4166 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4167 return result;
4168 }
4169
4170
4171 /**
4172 * trms1040_read_all - read all bytes from the eeprom
4173 *
4174 * Read the 128 bytes from the SEEPROM.
4175 *
4176 * @eeprom: where to store the data
4177 * @io_port: the base io port
4178 **/
4179 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4180 {
4181 u8 *b_eeprom = (u8 *)eeprom;
4182 u8 addr;
4183
4184 /* Enable SEEPROM */
4185 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4186 io_port + TRM_S1040_GEN_CONTROL);
4187
4188 /* read details */
4189 for (addr = 0; addr < 128; addr++, b_eeprom++)
4190 *b_eeprom = trms1040_get_data(io_port, addr);
4191
4192 /* Disable SEEPROM */
4193 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4194 io_port + TRM_S1040_GEN_CONTROL);
4195 }
4196
4197
4198
4199 /**
4200 * check_eeprom - get and check contents of the eeprom
4201 *
4202 * Read seeprom 128 bytes into the memory provider in eeprom.
4203 * Checks the checksum and if it's not correct it uses a set of default
4204 * values.
4205 *
4206 * @eeprom: caller allocated strcuture to read the eeprom data into
4207 * @io_port: io port to read from
4208 **/
4209 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4210 {
4211 u16 *w_eeprom = (u16 *)eeprom;
4212 u16 w_addr;
4213 u16 cksum;
4214 u32 d_addr;
4215 u32 *d_eeprom;
4216
4217 trms1040_read_all(eeprom, io_port); /* read eeprom */
4218
4219 cksum = 0;
4220 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4221 w_addr++, w_eeprom++)
4222 cksum += *w_eeprom;
4223 if (cksum != 0x1234) {
4224 /*
4225 * Checksum is wrong.
4226 * Load a set of defaults into the eeprom buffer
4227 */
4228 dprintkl(KERN_WARNING,
4229 "EEProm checksum error: using default values and options.\n");
4230 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4231 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4232 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4233 eeprom->sub_sys_id[1] =
4234 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4235 eeprom->sub_class = 0x00;
4236 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4237 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4238 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4239 eeprom->device_id[1] =
4240 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4241 eeprom->reserved = 0x00;
4242
4243 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4244 d_addr < 16; d_addr++, d_eeprom++)
4245 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4246
4247 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4248 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4249 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4250 *d_eeprom = 0x00;
4251
4252 /* Now load defaults (maybe set by boot/module params) */
4253 set_safe_settings();
4254 fix_settings();
4255 eeprom_override(eeprom);
4256
4257 eeprom->cksum = 0x00;
4258 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4259 w_addr < 63; w_addr++, w_eeprom++)
4260 cksum += *w_eeprom;
4261
4262 *w_eeprom = 0x1234 - cksum;
4263 trms1040_write_all(eeprom, io_port);
4264 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4265 } else {
4266 set_safe_settings();
4267 eeprom_index_to_delay(eeprom);
4268 eeprom_override(eeprom);
4269 }
4270 }
4271
4272
4273 /**
4274 * print_eeprom_settings - output the eeprom settings
4275 * to the kernel log so people can see what they were.
4276 *
4277 * @eeprom: The eeprom data strucutre to show details for.
4278 **/
4279 static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4280 {
4281 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4282 eeprom->scsi_id,
4283 eeprom->target[0].period,
4284 clock_speed[eeprom->target[0].period] / 10,
4285 clock_speed[eeprom->target[0].period] % 10,
4286 eeprom->target[0].cfg0);
4287 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4288 eeprom->channel_cfg, eeprom->max_tag,
4289 1 << eeprom->max_tag, eeprom->delay_time);
4290 }
4291
4292
4293 /* Free SG tables */
4294 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4295 {
4296 int i;
4297 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4298
4299 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4300 kfree(acb->srb_array[i].segment_x);
4301 }
4302
4303
4304 /*
4305 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4306 * should never cross a page boundary */
4307 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4308 {
4309 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4310 *SEGMENTX_LEN;
4311 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4312 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4313 int srb_idx = 0;
4314 unsigned i = 0;
4315 struct SGentry *ptr;
4316
4317 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4318 acb->srb_array[i].segment_x = NULL;
4319
4320 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4321 while (pages--) {
4322 ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL);
4323 if (!ptr) {
4324 adapter_sg_tables_free(acb);
4325 return 1;
4326 }
4327 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4328 PAGE_SIZE, ptr, srb_idx);
4329 i = 0;
4330 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4331 acb->srb_array[srb_idx++].segment_x =
4332 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4333 }
4334 if (i < srbs_per_page)
4335 acb->srb.segment_x =
4336 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4337 else
4338 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4339 return 0;
4340 }
4341
4342
4343
4344 /**
4345 * adapter_print_config - print adapter connection and termination
4346 * config
4347 *
4348 * The io port in the adapter needs to have been set before calling
4349 * this function.
4350 *
4351 * @acb: The adapter to print the information for.
4352 **/
4353 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4354 {
4355 u8 bval;
4356
4357 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4358 dprintkl(KERN_INFO, "%sConnectors: ",
4359 ((bval & WIDESCSI) ? "(Wide) " : ""));
4360 if (!(bval & CON5068))
4361 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4362 if (!(bval & CON68))
4363 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4364 if (!(bval & CON50))
4365 printk("int50 ");
4366 if ((bval & (CON5068 | CON50 | CON68)) ==
4367 0 /*(CON5068 | CON50 | CON68) */ )
4368 printk(" Oops! (All 3?) ");
4369 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4370 printk(" Termination: ");
4371 if (bval & DIS_TERM)
4372 printk("Disabled\n");
4373 else {
4374 if (bval & AUTOTERM)
4375 printk("Auto ");
4376 if (bval & LOW8TERM)
4377 printk("Low ");
4378 if (bval & UP8TERM)
4379 printk("High ");
4380 printk("\n");
4381 }
4382 }
4383
4384
4385 /**
4386 * adapter_init_params - Initialize the various parameters in the
4387 * adapter structure. Note that the pointer to the scsi_host is set
4388 * early (when this instance is created) and the io_port and irq
4389 * values are set later after they have been reserved. This just gets
4390 * everything set to a good starting position.
4391 *
4392 * The eeprom structure in the adapter needs to have been set before
4393 * calling this function.
4394 *
4395 * @acb: The adapter to initialize.
4396 **/
4397 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4398 {
4399 struct NvRamType *eeprom = &acb->eeprom;
4400 int i;
4401
4402 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4403 /* NOTE: acb->io_port_base is set at port registration time */
4404 /* NOTE: acb->io_port_len is set at port registration time */
4405
4406 INIT_LIST_HEAD(&acb->dcb_list);
4407 acb->dcb_run_robin = NULL;
4408 acb->active_dcb = NULL;
4409
4410 INIT_LIST_HEAD(&acb->srb_free_list);
4411 /* temp SRB for Q tag used or abort command used */
4412 acb->tmp_srb = &acb->srb;
4413 init_timer(&acb->waiting_timer);
4414 init_timer(&acb->selto_timer);
4415
4416 acb->srb_count = DC395x_MAX_SRB_CNT;
4417
4418 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4419 /* NOTE: acb->irq_level is set at IRQ registration time */
4420
4421 acb->tag_max_num = 1 << eeprom->max_tag;
4422 if (acb->tag_max_num > 30)
4423 acb->tag_max_num = 30;
4424
4425 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4426 acb->gmode2 = eeprom->channel_cfg;
4427 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4428
4429 if (eeprom->channel_cfg & NAC_SCANLUN)
4430 acb->lun_chk = 1;
4431 acb->scan_devices = 1;
4432
4433 acb->scsi_host->this_id = eeprom->scsi_id;
4434 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4435
4436 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4437 acb->dcb_map[i] = 0;
4438
4439 acb->msg_len = 0;
4440
4441 /* link static array of srbs into the srb free list */
4442 for (i = 0; i < acb->srb_count - 1; i++)
4443 srb_free_insert(acb, &acb->srb_array[i]);
4444 }
4445
4446
4447 /**
4448 * adapter_init_host - Initialize the scsi host instance based on
4449 * values that we have already stored in the adapter instance. There's
4450 * some mention that a lot of these are deprecated, so we won't use
4451 * them (we'll use the ones in the adapter instance) but we'll fill
4452 * them in in case something else needs them.
4453 *
4454 * The eeprom structure, irq and io ports in the adapter need to have
4455 * been set before calling this function.
4456 *
4457 * @host: The scsi host instance to fill in the values for.
4458 **/
4459 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4460 {
4461 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4462 struct NvRamType *eeprom = &acb->eeprom;
4463
4464 host->max_cmd_len = 24;
4465 host->can_queue = DC395x_MAX_CMD_QUEUE;
4466 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4467 host->this_id = (int)eeprom->scsi_id;
4468 host->io_port = acb->io_port_base;
4469 host->n_io_port = acb->io_port_len;
4470 host->dma_channel = -1;
4471 host->unique_id = acb->io_port_base;
4472 host->irq = acb->irq_level;
4473 host->last_reset = jiffies;
4474
4475 host->max_id = 16;
4476 if (host->max_id - 1 == eeprom->scsi_id)
4477 host->max_id--;
4478
4479 #ifdef CONFIG_SCSI_MULTI_LUN
4480 if (eeprom->channel_cfg & NAC_SCANLUN)
4481 host->max_lun = 8;
4482 else
4483 host->max_lun = 1;
4484 #else
4485 host->max_lun = 1;
4486 #endif
4487
4488 }
4489
4490
4491 /**
4492 * adapter_init_chip - Get the chip into a know state and figure out
4493 * some of the settings that apply to this adapter.
4494 *
4495 * The io port in the adapter needs to have been set before calling
4496 * this function. The config will be configured correctly on return.
4497 *
4498 * @acb: The adapter which we are to init.
4499 **/
4500 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4501 {
4502 struct NvRamType *eeprom = &acb->eeprom;
4503
4504 /* Mask all the interrupt */
4505 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4506 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4507
4508 /* Reset SCSI module */
4509 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4510
4511 /* Reset PCI/DMA module */
4512 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4513 udelay(20);
4514
4515 /* program configuration 0 */
4516 acb->config = HCC_AUTOTERM | HCC_PARITY;
4517 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4518 acb->config |= HCC_WIDE_CARD;
4519
4520 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4521 acb->config |= HCC_SCSI_RESET;
4522
4523 if (acb->config & HCC_SCSI_RESET) {
4524 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4525 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4526
4527 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4528 /*spin_unlock_irq (&io_request_lock); */
4529 udelay(500);
4530
4531 acb->scsi_host->last_reset =
4532 jiffies + HZ / 2 +
4533 HZ * acb->eeprom.delay_time;
4534
4535 /*spin_lock_irq (&io_request_lock); */
4536 }
4537 }
4538
4539
4540 /**
4541 * init_adapter - Grab the resource for the card, setup the adapter
4542 * information, set the card into a known state, create the various
4543 * tables etc etc. This basically gets all adapter information all up
4544 * to date, intialised and gets the chip in sync with it.
4545 *
4546 * @host: This hosts adapter structure
4547 * @io_port: The base I/O port
4548 * @irq: IRQ
4549 *
4550 * Returns 0 if the initialization succeeds, any other value on
4551 * failure.
4552 **/
4553 static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4554 unsigned long io_port, u32 io_port_len, unsigned int irq)
4555 {
4556 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4557 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4558 goto failed;
4559 }
4560 /* store port base to indicate we have registered it */
4561 acb->io_port_base = io_port;
4562 acb->io_port_len = io_port_len;
4563
4564 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4565 /* release the region we just claimed */
4566 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4567 goto failed;
4568 }
4569 /* store irq to indicate we have registered it */
4570 acb->irq_level = irq;
4571
4572 /* get eeprom configuration information and command line settings etc */
4573 check_eeprom(&acb->eeprom, io_port);
4574 print_eeprom_settings(&acb->eeprom);
4575
4576 /* setup adapter control block */
4577 adapter_init_params(acb);
4578
4579 /* display card connectors/termination settings */
4580 adapter_print_config(acb);
4581
4582 if (adapter_sg_tables_alloc(acb)) {
4583 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4584 goto failed;
4585 }
4586 adapter_init_scsi_host(acb->scsi_host);
4587 adapter_init_chip(acb);
4588 set_basic_config(acb);
4589
4590 dprintkdbg(DBG_0,
4591 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4592 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4593 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4594 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4595 return 0;
4596
4597 failed:
4598 if (acb->irq_level)
4599 free_irq(acb->irq_level, acb);
4600 if (acb->io_port_base)
4601 release_region(acb->io_port_base, acb->io_port_len);
4602 adapter_sg_tables_free(acb);
4603
4604 return 1;
4605 }
4606
4607
4608 /**
4609 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4610 * stopping all operations and disabling interrupt generation on the
4611 * card.
4612 *
4613 * @acb: The adapter which we are to shutdown.
4614 **/
4615 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4616 {
4617 /* disable interrupts */
4618 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4619 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4620
4621 /* reset the scsi bus */
4622 if (acb->config & HCC_SCSI_RESET)
4623 reset_scsi_bus(acb);
4624
4625 /* clear any pending interupt state */
4626 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4627 }
4628
4629
4630
4631 /**
4632 * adapter_uninit - Shut down the chip and release any resources that
4633 * we had allocated. Once this returns the adapter should not be used
4634 * anymore.
4635 *
4636 * @acb: The adapter which we are to un-initialize.
4637 **/
4638 static void adapter_uninit(struct AdapterCtlBlk *acb)
4639 {
4640 unsigned long flags;
4641 DC395x_LOCK_IO(acb->scsi_host, flags);
4642
4643 /* remove timers */
4644 if (timer_pending(&acb->waiting_timer))
4645 del_timer(&acb->waiting_timer);
4646 if (timer_pending(&acb->selto_timer))
4647 del_timer(&acb->selto_timer);
4648
4649 adapter_uninit_chip(acb);
4650 adapter_remove_and_free_all_devices(acb);
4651 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4652
4653 if (acb->irq_level)
4654 free_irq(acb->irq_level, acb);
4655 if (acb->io_port_base)
4656 release_region(acb->io_port_base, acb->io_port_len);
4657
4658 adapter_sg_tables_free(acb);
4659 }
4660
4661
4662 #undef SPRINTF
4663 #define SPRINTF(args...) pos += sprintf(pos, args)
4664
4665 #undef YESNO
4666 #define YESNO(YN) \
4667 if (YN) SPRINTF(" Yes ");\
4668 else SPRINTF(" No ")
4669
4670 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4671 char **start, off_t offset, int length, int inout)
4672 {
4673 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4674 int spd, spd1;
4675 char *pos = buffer;
4676 struct DeviceCtlBlk *dcb;
4677 unsigned long flags;
4678 int dev;
4679
4680 if (inout) /* Has data been written to the file ? */
4681 return -EPERM;
4682
4683 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4684 SPRINTF(" Driver Version " DC395X_VERSION "\n");
4685
4686 DC395x_LOCK_IO(acb->scsi_host, flags);
4687
4688 SPRINTF("SCSI Host Nr %i, ", host->host_no);
4689 SPRINTF("DC395U/UW/F DC315/U %s\n",
4690 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4691 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4692 SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4693 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4694
4695 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4696 SPRINTF("AdapterID %i\n", host->this_id);
4697
4698 SPRINTF("tag_max_num %i", acb->tag_max_num);
4699 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4700 SPRINTF(", FilterCfg 0x%02x",
4701 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4702 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4703 /*SPRINTF("\n"); */
4704
4705 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4706 SPRINTF
4707 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4708 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4709 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4710 acb->dcb_map[6], acb->dcb_map[7]);
4711 SPRINTF
4712 (" %02x %02x %02x %02x %02x %02x %02x %02x\n",
4713 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4714 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4715 acb->dcb_map[14], acb->dcb_map[15]);
4716
4717 SPRINTF
4718 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4719
4720 dev = 0;
4721 list_for_each_entry(dcb, &acb->dcb_list, list) {
4722 int nego_period;
4723 SPRINTF("%02i %02i %02i ", dev, dcb->target_id,
4724 dcb->target_lun);
4725 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4726 YESNO(dcb->sync_offset);
4727 YESNO(dcb->sync_period & WIDE_SYNC);
4728 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4729 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4730 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4731 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4732 if (dcb->sync_offset)
4733 SPRINTF(" %03i ns ", nego_period);
4734 else
4735 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4736
4737 if (dcb->sync_offset & 0x0f) {
4738 spd = 1000 / (nego_period);
4739 spd1 = 1000 % (nego_period);
4740 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4741 SPRINTF(" %2i.%1i M %02i ", spd, spd1,
4742 (dcb->sync_offset & 0x0f));
4743 } else
4744 SPRINTF(" ");
4745
4746 /* Add more info ... */
4747 SPRINTF(" %02i\n", dcb->max_command);
4748 dev++;
4749 }
4750
4751 if (timer_pending(&acb->waiting_timer))
4752 SPRINTF("Waiting queue timer running\n");
4753 else
4754 SPRINTF("\n");
4755
4756 list_for_each_entry(dcb, &acb->dcb_list, list) {
4757 struct ScsiReqBlk *srb;
4758 if (!list_empty(&dcb->srb_waiting_list))
4759 SPRINTF("DCB (%02i-%i): Waiting: %i:",
4760 dcb->target_id, dcb->target_lun,
4761 list_size(&dcb->srb_waiting_list));
4762 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4763 SPRINTF(" %li", srb->cmd->pid);
4764 if (!list_empty(&dcb->srb_going_list))
4765 SPRINTF("\nDCB (%02i-%i): Going : %i:",
4766 dcb->target_id, dcb->target_lun,
4767 list_size(&dcb->srb_going_list));
4768 list_for_each_entry(srb, &dcb->srb_going_list, list)
4769 SPRINTF(" %li", srb->cmd->pid);
4770 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4771 SPRINTF("\n");
4772 }
4773
4774 if (debug_enabled(DBG_1)) {
4775 SPRINTF("DCB list for ACB %p:\n", acb);
4776 list_for_each_entry(dcb, &acb->dcb_list, list) {
4777 SPRINTF("%p -> ", dcb);
4778 }
4779 SPRINTF("END\n");
4780 }
4781
4782 *start = buffer + offset;
4783 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4784
4785 if (pos - buffer < offset)
4786 return 0;
4787 else if (pos - buffer - offset < length)
4788 return pos - buffer - offset;
4789 else
4790 return length;
4791 }
4792
4793
4794 static struct scsi_host_template dc395x_driver_template = {
4795 .module = THIS_MODULE,
4796 .proc_name = DC395X_NAME,
4797 .proc_info = dc395x_proc_info,
4798 .name = DC395X_BANNER " " DC395X_VERSION,
4799 .queuecommand = dc395x_queue_command,
4800 .bios_param = dc395x_bios_param,
4801 .slave_alloc = dc395x_slave_alloc,
4802 .slave_destroy = dc395x_slave_destroy,
4803 .can_queue = DC395x_MAX_CAN_QUEUE,
4804 .this_id = 7,
4805 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4806 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4807 .eh_abort_handler = dc395x_eh_abort,
4808 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4809 .unchecked_isa_dma = 0,
4810 .use_clustering = DISABLE_CLUSTERING,
4811 };
4812
4813
4814 /**
4815 * banner_display - Display banner on first instance of driver
4816 * initialized.
4817 **/
4818 static void banner_display(void)
4819 {
4820 static int banner_done = 0;
4821 if (!banner_done)
4822 {
4823 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4824 banner_done = 1;
4825 }
4826 }
4827
4828
4829 /**
4830 * dc395x_init_one - Initialise a single instance of the adapter.
4831 *
4832 * The PCI layer will call this once for each instance of the adapter
4833 * that it finds in the system. The pci_dev strcuture indicates which
4834 * instance we are being called from.
4835 *
4836 * @dev: The PCI device to intialize.
4837 * @id: Looks like a pointer to the entry in our pci device table
4838 * that was actually matched by the PCI subsystem.
4839 *
4840 * Returns 0 on success, or an error code (-ve) on failure.
4841 **/
4842 static int __devinit dc395x_init_one(struct pci_dev *dev,
4843 const struct pci_device_id *id)
4844 {
4845 struct Scsi_Host *scsi_host = NULL;
4846 struct AdapterCtlBlk *acb = NULL;
4847 unsigned long io_port_base;
4848 unsigned int io_port_len;
4849 unsigned int irq;
4850
4851 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4852 banner_display();
4853
4854 if (pci_enable_device(dev))
4855 {
4856 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4857 return -ENODEV;
4858 }
4859 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4860 io_port_len = pci_resource_len(dev, 0);
4861 irq = dev->irq;
4862 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4863
4864 /* allocate scsi host information (includes out adapter) */
4865 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4866 sizeof(struct AdapterCtlBlk));
4867 if (!scsi_host) {
4868 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4869 goto fail;
4870 }
4871 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4872 acb->scsi_host = scsi_host;
4873 acb->dev = dev;
4874
4875 /* initialise the adapter and everything we need */
4876 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4877 dprintkl(KERN_INFO, "adapter init failed\n");
4878 goto fail;
4879 }
4880
4881 pci_set_master(dev);
4882
4883 /* get the scsi mid level to scan for new devices on the bus */
4884 if (scsi_add_host(scsi_host, &dev->dev)) {
4885 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4886 goto fail;
4887 }
4888 pci_set_drvdata(dev, scsi_host);
4889 scsi_scan_host(scsi_host);
4890
4891 return 0;
4892
4893 fail:
4894 if (acb != NULL)
4895 adapter_uninit(acb);
4896 if (scsi_host != NULL)
4897 scsi_host_put(scsi_host);
4898 pci_disable_device(dev);
4899 return -ENODEV;
4900 }
4901
4902
4903 /**
4904 * dc395x_remove_one - Called to remove a single instance of the
4905 * adapter.
4906 *
4907 * @dev: The PCI device to intialize.
4908 **/
4909 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4910 {
4911 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4912 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4913
4914 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4915
4916 scsi_remove_host(scsi_host);
4917 adapter_uninit(acb);
4918 pci_disable_device(dev);
4919 scsi_host_put(scsi_host);
4920 pci_set_drvdata(dev, NULL);
4921 }
4922
4923
4924 static struct pci_device_id dc395x_pci_table[] = {
4925 {
4926 .vendor = PCI_VENDOR_ID_TEKRAM,
4927 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4928 .subvendor = PCI_ANY_ID,
4929 .subdevice = PCI_ANY_ID,
4930 },
4931 {} /* Terminating entry */
4932 };
4933 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4934
4935
4936 static struct pci_driver dc395x_driver = {
4937 .name = DC395X_NAME,
4938 .id_table = dc395x_pci_table,
4939 .probe = dc395x_init_one,
4940 .remove = __devexit_p(dc395x_remove_one),
4941 };
4942
4943
4944 /**
4945 * dc395x_module_init - Module initialization function
4946 *
4947 * Used by both module and built-in driver to initialise this driver.
4948 **/
4949 static int __init dc395x_module_init(void)
4950 {
4951 return pci_register_driver(&dc395x_driver);
4952 }
4953
4954
4955 /**
4956 * dc395x_module_exit - Module cleanup function.
4957 **/
4958 static void __exit dc395x_module_exit(void)
4959 {
4960 pci_unregister_driver(&dc395x_driver);
4961 }
4962
4963
4964 module_init(dc395x_module_init);
4965 module_exit(dc395x_module_exit);
4966
4967 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4968 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4969 MODULE_LICENSE("GPL");
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