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allow coexistance of N build and AC build.
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / scsi / dc395x.c
blobdbc4260889921a692c0dacf138156593aa254609
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 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 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, SCSI_SENSE_BUFFERSIZE);
1646 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1647 } else {
1648 ptr = (u8 *)srb->cmd->cmnd;
1649 for (i = 0; i < srb->cmd->cmd_len; i++)
1650 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1651 }
1652 no_cmd:
1653 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1654 DO_HWRESELECT | DO_DATALATCH);
1655 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1656 /*
1657 * If start_scsi return 1:
1658 * we caught an interrupt (must be reset or reselection ... )
1659 * : Let's process it first!
1660 */
1661 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
1662 srb->cmd->pid, dcb->target_id, dcb->target_lun);
1663 srb->state = SRB_READY;
1664 free_tag(dcb, srb);
1665 srb->msg_count = 0;
1666 return_code = 1;
1667 /* This IRQ should NOT get lost, as we did not acknowledge it */
1668 } else {
1669 /*
1670 * If start_scsi returns 0:
1671 * we know that the SCSI processor is free
1672 */
1673 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1674 dcb->active_srb = srb;
1675 acb->active_dcb = dcb;
1676 return_code = 0;
1677 /* it's important for atn stop */
1678 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1679 DO_DATALATCH | DO_HWRESELECT);
1680 /* SCSI command */
1681 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1682 }
1683 return return_code;
1684 }
1685
1686
1687 #define DC395x_ENABLE_MSGOUT \
1688 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1689 srb->state |= SRB_MSGOUT
1690
1691
1692 /* abort command */
1693 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1694 struct ScsiReqBlk *srb)
1695 {
1696 srb->msgout_buf[0] = ABORT;
1697 srb->msg_count = 1;
1698 DC395x_ENABLE_MSGOUT;
1699 srb->state &= ~SRB_MSGIN;
1700 srb->state |= SRB_MSGOUT;
1701 }
1702
1703
1704 /**
1705 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1706 * have been triggered for this card.
1707 *
1708 * @acb: a pointer to the adpter control block
1709 * @scsi_status: the status return when we checked the card
1710 **/
1711 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1712 u16 scsi_status)
1713 {
1714 struct DeviceCtlBlk *dcb;
1715 struct ScsiReqBlk *srb;
1716 u16 phase;
1717 u8 scsi_intstatus;
1718 unsigned long flags;
1719 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1720 u16 *);
1721
1722 DC395x_LOCK_IO(acb->scsi_host, flags);
1723
1724 /* This acknowledges the IRQ */
1725 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1726 if ((scsi_status & 0x2007) == 0x2002)
1727 dprintkl(KERN_DEBUG,
1728 "COP after COP completed? %04x\n", scsi_status);
1729 if (debug_enabled(DBG_KG)) {
1730 if (scsi_intstatus & INT_SELTIMEOUT)
1731 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1732 }
1733 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1734
1735 if (timer_pending(&acb->selto_timer))
1736 del_timer(&acb->selto_timer);
1737
1738 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1739 disconnect(acb); /* bus free interrupt */
1740 goto out_unlock;
1741 }
1742 if (scsi_intstatus & INT_RESELECTED) {
1743 reselect(acb);
1744 goto out_unlock;
1745 }
1746 if (scsi_intstatus & INT_SELECT) {
1747 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1748 goto out_unlock;
1749 }
1750 if (scsi_intstatus & INT_SCSIRESET) {
1751 scsi_reset_detect(acb);
1752 goto out_unlock;
1753 }
1754 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1755 dcb = acb->active_dcb;
1756 if (!dcb) {
1757 dprintkl(KERN_DEBUG,
1758 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1759 scsi_status, scsi_intstatus);
1760 goto out_unlock;
1761 }
1762 srb = dcb->active_srb;
1763 if (dcb->flag & ABORT_DEV_) {
1764 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1765 enable_msgout_abort(acb, srb);
1766 }
1767
1768 /* software sequential machine */
1769 phase = (u16)srb->scsi_phase;
1770
1771 /*
1772 * 62037 or 62137
1773 * call dc395x_scsi_phase0[]... "phase entry"
1774 * handle every phase before start transfer
1775 */
1776 /* data_out_phase0, phase:0 */
1777 /* data_in_phase0, phase:1 */
1778 /* command_phase0, phase:2 */
1779 /* status_phase0, phase:3 */
1780 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1781 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1782 /* msgout_phase0, phase:6 */
1783 /* msgin_phase0, phase:7 */
1784 dc395x_statev = dc395x_scsi_phase0[phase];
1785 dc395x_statev(acb, srb, &scsi_status);
1786
1787 /*
1788 * if there were any exception occured scsi_status
1789 * will be modify to bus free phase new scsi_status
1790 * transfer out from ... previous dc395x_statev
1791 */
1792 srb->scsi_phase = scsi_status & PHASEMASK;
1793 phase = (u16)scsi_status & PHASEMASK;
1794
1795 /*
1796 * call dc395x_scsi_phase1[]... "phase entry" handle
1797 * every phase to do transfer
1798 */
1799 /* data_out_phase1, phase:0 */
1800 /* data_in_phase1, phase:1 */
1801 /* command_phase1, phase:2 */
1802 /* status_phase1, phase:3 */
1803 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1804 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1805 /* msgout_phase1, phase:6 */
1806 /* msgin_phase1, phase:7 */
1807 dc395x_statev = dc395x_scsi_phase1[phase];
1808 dc395x_statev(acb, srb, &scsi_status);
1809 }
1810 out_unlock:
1811 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1812 }
1813
1814
1815 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1816 {
1817 struct AdapterCtlBlk *acb = dev_id;
1818 u16 scsi_status;
1819 u8 dma_status;
1820 irqreturn_t handled = IRQ_NONE;
1821
1822 /*
1823 * Check for pending interupt
1824 */
1825 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1826 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1827 if (scsi_status & SCSIINTERRUPT) {
1828 /* interupt pending - let's process it! */
1829 dc395x_handle_interrupt(acb, scsi_status);
1830 handled = IRQ_HANDLED;
1831 }
1832 else if (dma_status & 0x20) {
1833 /* Error from the DMA engine */
1834 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1835 #if 0
1836 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1837 if (acb->active_dcb) {
1838 acb->active_dcb-> flag |= ABORT_DEV_;
1839 if (acb->active_dcb->active_srb)
1840 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1841 }
1842 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1843 #else
1844 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1845 acb = NULL;
1846 #endif
1847 handled = IRQ_HANDLED;
1848 }
1849
1850 return handled;
1851 }
1852
1853
1854 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1855 u16 *pscsi_status)
1856 {
1857 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid);
1858 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1859 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1860
1861 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1862 srb->state &= ~SRB_MSGOUT;
1863 }
1864
1865
1866 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1867 u16 *pscsi_status)
1868 {
1869 u16 i;
1870 u8 *ptr;
1871 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid);
1872
1873 clear_fifo(acb, "msgout_phase1");
1874 if (!(srb->state & SRB_MSGOUT)) {
1875 srb->state |= SRB_MSGOUT;
1876 dprintkl(KERN_DEBUG,
1877 "msgout_phase1: (pid#%li) Phase unexpected\n",
1878 srb->cmd->pid); /* So what ? */
1879 }
1880 if (!srb->msg_count) {
1881 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
1882 srb->cmd->pid);
1883 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1884 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1885 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1886 return;
1887 }
1888 ptr = (u8 *)srb->msgout_buf;
1889 for (i = 0; i < srb->msg_count; i++)
1890 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1891 srb->msg_count = 0;
1892 if (srb->msgout_buf[0] == MSG_ABORT)
1893 srb->state = SRB_ABORT_SENT;
1894
1895 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1896 }
1897
1898
1899 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1900 u16 *pscsi_status)
1901 {
1902 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid);
1903 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1904 }
1905
1906
1907 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1908 u16 *pscsi_status)
1909 {
1910 struct DeviceCtlBlk *dcb;
1911 u8 *ptr;
1912 u16 i;
1913 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid);
1914
1915 clear_fifo(acb, "command_phase1");
1916 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1917 if (!(srb->flag & AUTO_REQSENSE)) {
1918 ptr = (u8 *)srb->cmd->cmnd;
1919 for (i = 0; i < srb->cmd->cmd_len; i++) {
1920 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1921 ptr++;
1922 }
1923 } else {
1924 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1925 dcb = acb->active_dcb;
1926 /* target id */
1927 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1928 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1929 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1930 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1931 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1932 }
1933 srb->state |= SRB_COMMAND;
1934 /* it's important for atn stop */
1935 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1936 /* SCSI command */
1937 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1938 }
1939
1940
1941 /*
1942 * Verify that the remaining space in the hw sg lists is the same as
1943 * the count of remaining bytes in srb->total_xfer_length
1944 */
1945 static void sg_verify_length(struct ScsiReqBlk *srb)
1946 {
1947 if (debug_enabled(DBG_SG)) {
1948 unsigned len = 0;
1949 unsigned idx = srb->sg_index;
1950 struct SGentry *psge = srb->segment_x + idx;
1951 for (; idx < srb->sg_count; psge++, idx++)
1952 len += psge->length;
1953 if (len != srb->total_xfer_length)
1954 dprintkdbg(DBG_SG,
1955 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1956 srb->total_xfer_length, len);
1957 }
1958 }
1959
1960
1961 /*
1962 * Compute the next Scatter Gather list index and adjust its length
1963 * and address if necessary
1964 */
1965 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1966 {
1967 u8 idx;
1968 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
1969 struct SGentry *psge = srb->segment_x + srb->sg_index;
1970
1971 dprintkdbg(DBG_0,
1972 "sg_update_list: Transfered %i of %i bytes, %i remain\n",
1973 xferred, srb->total_xfer_length, left);
1974 if (xferred == 0) {
1975 /* nothing to update since we did not transfer any data */
1976 return;
1977 }
1978
1979 sg_verify_length(srb);
1980 srb->total_xfer_length = left; /* update remaining count */
1981 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1982 if (xferred >= psge->length) {
1983 /* Complete SG entries done */
1984 xferred -= psge->length;
1985 } else {
1986 /* Partial SG entry done */
1987 psge->length -= xferred;
1988 psge->address += xferred;
1989 srb->sg_index = idx;
1990 pci_dma_sync_single_for_device(srb->dcb->
1991 acb->dev,
1992 srb->sg_bus_addr,
1993 SEGMENTX_LEN,
1994 PCI_DMA_TODEVICE);
1995 break;
1996 }
1997 psge++;
1998 }
1999 sg_verify_length(srb);
2000 }
2001
2002
2003 /*
2004 * We have transfered a single byte (PIO mode?) and need to update
2005 * the count of bytes remaining (total_xfer_length) and update the sg
2006 * entry to either point to next byte in the current sg entry, or of
2007 * already at the end to point to the start of the next sg entry
2008 */
2009 static void sg_subtract_one(struct ScsiReqBlk *srb)
2010 {
2011 sg_update_list(srb, srb->total_xfer_length - 1);
2012 }
2013
2014
2015 /*
2016 * cleanup_after_transfer
2017 *
2018 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2019 * KG: Currently called from StatusPhase1 ()
2020 * Should probably also be called from other places
2021 * Best might be to call it in DataXXPhase0, if new phase will differ
2022 */
2023 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2024 struct ScsiReqBlk *srb)
2025 {
2026 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2027 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2028 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2029 clear_fifo(acb, "cleanup/in");
2030 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2031 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2032 } else { /* write */
2033 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2034 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2035 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2036 clear_fifo(acb, "cleanup/out");
2037 }
2038 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2039 }
2040
2041
2042 /*
2043 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
2044 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2045 */
2046 #define DC395x_LASTPIO 4
2047
2048
2049 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2050 u16 *pscsi_status)
2051 {
2052 struct DeviceCtlBlk *dcb = srb->dcb;
2053 u16 scsi_status = *pscsi_status;
2054 u32 d_left_counter = 0;
2055 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
2056 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2057
2058 /*
2059 * KG: We need to drain the buffers before we draw any conclusions!
2060 * This means telling the DMA to push the rest into SCSI, telling
2061 * SCSI to push the rest to the bus.
2062 * However, the device might have been the one to stop us (phase
2063 * change), and the data in transit just needs to be accounted so
2064 * it can be retransmitted.)
2065 */
2066 /*
2067 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2068 * If we need more data, the DMA SG list will be freshly set up, anyway
2069 */
2070 dprintkdbg(DBG_PIO, "data_out_phase0: "
2071 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2072 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2073 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2074 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2075 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2076 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2077 srb->total_xfer_length);
2078 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2079
2080 if (!(srb->state & SRB_XFERPAD)) {
2081 if (scsi_status & PARITYERROR)
2082 srb->status |= PARITY_ERROR;
2083
2084 /*
2085 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2086 * is the no of bytes it got from the DMA engine not the no it
2087 * transferred successfully to the device. (And the difference could
2088 * be as much as the FIFO size, I guess ...)
2089 */
2090 if (!(scsi_status & SCSIXFERDONE)) {
2091 /*
2092 * when data transfer from DMA FIFO to SCSI FIFO
2093 * if there was some data left in SCSI FIFO
2094 */
2095 d_left_counter =
2096 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2097 0x1F);
2098 if (dcb->sync_period & WIDE_SYNC)
2099 d_left_counter <<= 1;
2100
2101 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2102 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2103 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2104 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2105 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2106 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2107 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2108 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2109 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2110 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2111 }
2112 /*
2113 * calculate all the residue data that not yet tranfered
2114 * SCSI transfer counter + left in SCSI FIFO data
2115 *
2116 * .....TRM_S1040_SCSI_COUNTER (24bits)
2117 * The counter always decrement by one for every SCSI byte transfer.
2118 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2119 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2120 */
2121 if (srb->total_xfer_length > DC395x_LASTPIO)
2122 d_left_counter +=
2123 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2124
2125 /* Is this a good idea? */
2126 /*clear_fifo(acb, "DOP1"); */
2127 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2128 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2129 && srb->cmd->request_bufflen % 2) {
2130 d_left_counter = 0;
2131 dprintkl(KERN_INFO,
2132 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2133 scsi_status);
2134 }
2135 /*
2136 * KG: Oops again. Same thinko as above: The SCSI might have been
2137 * faster than the DMA engine, so that it ran out of data.
2138 * In that case, we have to do just nothing!
2139 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2140 */
2141 /*
2142 * KG: This is nonsense: We have been WRITING data to the bus
2143 * If the SCSI engine has no bytes left, how should the DMA engine?
2144 */
2145 if (d_left_counter == 0) {
2146 srb->total_xfer_length = 0;
2147 } else {
2148 /*
2149 * if transfer not yet complete
2150 * there were some data residue in SCSI FIFO or
2151 * SCSI transfer counter not empty
2152 */
2153 long oldxferred =
2154 srb->total_xfer_length - d_left_counter;
2155 const int diff =
2156 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2157 sg_update_list(srb, d_left_counter);
2158 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2159 if ((srb->segment_x[srb->sg_index].length ==
2160 diff && srb->cmd->use_sg)
2161 || ((oldxferred & ~PAGE_MASK) ==
2162 (PAGE_SIZE - diff))
2163 ) {
2164 dprintkl(KERN_INFO, "data_out_phase0: "
2165 "Work around chip bug (%i)?\n", diff);
2166 d_left_counter =
2167 srb->total_xfer_length - diff;
2168 sg_update_list(srb, d_left_counter);
2169 /*srb->total_xfer_length -= diff; */
2170 /*srb->virt_addr += diff; */
2171 /*if (srb->cmd->use_sg) */
2172 /* srb->sg_index++; */
2173 }
2174 }
2175 }
2176 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2177 cleanup_after_transfer(acb, srb);
2178 }
2179 }
2180
2181
2182 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2183 u16 *pscsi_status)
2184 {
2185 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
2186 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2187 clear_fifo(acb, "data_out_phase1");
2188 /* do prepare before transfer when data out phase */
2189 data_io_transfer(acb, srb, XFERDATAOUT);
2190 }
2191
2192 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2193 u16 *pscsi_status)
2194 {
2195 u16 scsi_status = *pscsi_status;
2196
2197 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
2198 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2199
2200 /*
2201 * KG: DataIn is much more tricky than DataOut. When the device is finished
2202 * and switches to another phase, the SCSI engine should be finished too.
2203 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2204 * engine and transferred to memory.
2205 * We should wait for the FIFOs to be emptied by that (is there any way to
2206 * enforce this?) and then stop the DMA engine, because it might think, that
2207 * there are more bytes to follow. Yes, the device might disconnect prior to
2208 * having all bytes transferred!
2209 * Also we should make sure that all data from the DMA engine buffer's really
2210 * made its way to the system memory! Some documentation on this would not
2211 * seem to be a bad idea, actually.
2212 */
2213 if (!(srb->state & SRB_XFERPAD)) {
2214 u32 d_left_counter;
2215 unsigned int sc, fc;
2216
2217 if (scsi_status & PARITYERROR) {
2218 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
2219 "Parity Error\n", srb->cmd->pid);
2220 srb->status |= PARITY_ERROR;
2221 }
2222 /*
2223 * KG: We should wait for the DMA FIFO to be empty ...
2224 * but: it would be better to wait first for the SCSI FIFO and then the
2225 * the DMA FIFO to become empty? How do we know, that the device not already
2226 * sent data to the FIFO in a MsgIn phase, eg.?
2227 */
2228 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2229 #if 0
2230 int ctr = 6000000;
2231 dprintkl(KERN_DEBUG,
2232 "DIP0: Wait for DMA FIFO to flush ...\n");
2233 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2234 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2235 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2236 while (!
2237 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2238 0x80) && --ctr);
2239 if (ctr < 6000000 - 1)
2240 dprintkl(KERN_DEBUG
2241 "DIP0: Had to wait for DMA ...\n");
2242 if (!ctr)
2243 dprintkl(KERN_ERR,
2244 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2245 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2246 #endif
2247 dprintkdbg(DBG_KG, "data_in_phase0: "
2248 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2249 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2250 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2251 }
2252 /* Now: Check remainig data: The SCSI counters should tell us ... */
2253 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2254 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2255 d_left_counter = sc + ((fc & 0x1f)
2256 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2257 0));
2258 dprintkdbg(DBG_KG, "data_in_phase0: "
2259 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2260 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2261 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2262 fc,
2263 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2264 sc,
2265 fc,
2266 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2267 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2268 srb->total_xfer_length, d_left_counter);
2269 #if DC395x_LASTPIO
2270 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
2271 if (d_left_counter
2272 && srb->total_xfer_length <= DC395x_LASTPIO) {
2273 size_t left_io = srb->total_xfer_length;
2274
2275 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2276 /*sg_update_list (srb, d_left_counter); */
2277 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2278 "for remaining %i bytes:",
2279 fc & 0x1f,
2280 (srb->dcb->sync_period & WIDE_SYNC) ?
2281 "words" : "bytes",
2282 srb->total_xfer_length);
2283 if (srb->dcb->sync_period & WIDE_SYNC)
2284 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2285 CFG2_WIDEFIFO);
2286 while (left_io) {
2287 unsigned char *virt, *base = NULL;
2288 unsigned long flags = 0;
2289 size_t len = left_io;
2290
2291 if (srb->cmd->use_sg) {
2292 size_t offset = srb->request_length - left_io;
2293 local_irq_save(flags);
2294 /* Assumption: it's inside one page as it's at most 4 bytes and
2295 I just assume it's on a 4-byte boundary */
2296 base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
2297 srb->sg_count, &offset, &len);
2298 virt = base + offset;
2299 } else {
2300 virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
2301 len = left_io;
2302 }
2303 left_io -= len;
2304
2305 while (len) {
2306 u8 byte;
2307 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2308 *virt++ = byte;
2309
2310 if (debug_enabled(DBG_PIO))
2311 printk(" %02x", byte);
2312
2313 d_left_counter--;
2314 sg_subtract_one(srb);
2315
2316 len--;
2317
2318 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2319
2320 if (fc == 0x40) {
2321 left_io = 0;
2322 break;
2323 }
2324 }
2325
2326 WARN_ON((fc != 0x40) == !d_left_counter);
2327
2328 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2329 /* Read the last byte ... */
2330 if (srb->total_xfer_length > 0) {
2331 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2332
2333 *virt++ = byte;
2334 srb->total_xfer_length--;
2335 if (debug_enabled(DBG_PIO))
2336 printk(" %02x", byte);
2337 }
2338
2339 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2340 }
2341
2342 if (srb->cmd->use_sg) {
2343 scsi_kunmap_atomic_sg(base);
2344 local_irq_restore(flags);
2345 }
2346 }
2347 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2348 /*srb->total_xfer_length = 0; */
2349 if (debug_enabled(DBG_PIO))
2350 printk("\n");
2351 }
2352 #endif /* DC395x_LASTPIO */
2353
2354 #if 0
2355 /*
2356 * KG: This was in DATAOUT. Does it also belong here?
2357 * Nobody seems to know what counter and fifo_cnt count exactly ...
2358 */
2359 if (!(scsi_status & SCSIXFERDONE)) {
2360 /*
2361 * when data transfer from DMA FIFO to SCSI FIFO
2362 * if there was some data left in SCSI FIFO
2363 */
2364 d_left_counter =
2365 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2366 0x1F);
2367 if (srb->dcb->sync_period & WIDE_SYNC)
2368 d_left_counter <<= 1;
2369 /*
2370 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2371 * so need to *= 2
2372 * KG: Seems to be correct ...
2373 */
2374 }
2375 #endif
2376 /* KG: This should not be needed any more! */
2377 if (d_left_counter == 0
2378 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2379 #if 0
2380 int ctr = 6000000;
2381 u8 TempDMAstatus;
2382 do {
2383 TempDMAstatus =
2384 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2385 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2386 if (!ctr)
2387 dprintkl(KERN_ERR,
2388 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2389 srb->total_xfer_length = 0;
2390 #endif
2391 srb->total_xfer_length = d_left_counter;
2392 } else { /* phase changed */
2393 /*
2394 * parsing the case:
2395 * when a transfer not yet complete
2396 * but be disconnected by target
2397 * if transfer not yet complete
2398 * there were some data residue in SCSI FIFO or
2399 * SCSI transfer counter not empty
2400 */
2401 sg_update_list(srb, d_left_counter);
2402 }
2403 }
2404 /* KG: The target may decide to disconnect: Empty FIFO before! */
2405 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2406 cleanup_after_transfer(acb, srb);
2407 }
2408 }
2409
2410
2411 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2412 u16 *pscsi_status)
2413 {
2414 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
2415 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2416 data_io_transfer(acb, srb, XFERDATAIN);
2417 }
2418
2419
2420 static void data_io_transfer(struct AdapterCtlBlk *acb,
2421 struct ScsiReqBlk *srb, u16 io_dir)
2422 {
2423 struct DeviceCtlBlk *dcb = srb->dcb;
2424 u8 bval;
2425 dprintkdbg(DBG_0,
2426 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2427 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
2428 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2429 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2430 if (srb == acb->tmp_srb)
2431 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2432 if (srb->sg_index >= srb->sg_count) {
2433 /* can't happen? out of bounds error */
2434 return;
2435 }
2436
2437 if (srb->total_xfer_length > DC395x_LASTPIO) {
2438 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2439 /*
2440 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2441 * Maybe, even ABORTXFER would be appropriate
2442 */
2443 if (dma_status & XFERPENDING) {
2444 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2445 "Expect trouble!\n");
2446 dump_register_info(acb, dcb, srb);
2447 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2448 }
2449 /* clear_fifo(acb, "IO"); */
2450 /*
2451 * load what physical address of Scatter/Gather list table
2452 * want to be transfer
2453 */
2454 srb->state |= SRB_DATA_XFER;
2455 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2456 if (srb->cmd->use_sg) { /* with S/G */
2457 io_dir |= DMACMD_SG;
2458 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2459 srb->sg_bus_addr +
2460 sizeof(struct SGentry) *
2461 srb->sg_index);
2462 /* load how many bytes in the sg list table */
2463 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2464 ((u32)(srb->sg_count -
2465 srb->sg_index) << 3));
2466 } else { /* without S/G */
2467 io_dir &= ~DMACMD_SG;
2468 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2469 srb->segment_x[0].address);
2470 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2471 srb->segment_x[0].length);
2472 }
2473 /* load total transfer length (24bits) max value 16Mbyte */
2474 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2475 srb->total_xfer_length);
2476 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2477 if (io_dir & DMACMD_DIR) { /* read */
2478 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2479 SCMD_DMA_IN);
2480 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2481 } else {
2482 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2483 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2484 SCMD_DMA_OUT);
2485 }
2486
2487 }
2488 #if DC395x_LASTPIO
2489 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2490 /*
2491 * load what physical address of Scatter/Gather list table
2492 * want to be transfer
2493 */
2494 srb->state |= SRB_DATA_XFER;
2495 /* load total transfer length (24bits) max value 16Mbyte */
2496 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2497 srb->total_xfer_length);
2498 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2499 if (io_dir & DMACMD_DIR) { /* read */
2500 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2501 SCMD_FIFO_IN);
2502 } else { /* write */
2503 int ln = srb->total_xfer_length;
2504 size_t left_io = srb->total_xfer_length;
2505
2506 if (srb->dcb->sync_period & WIDE_SYNC)
2507 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2508 CFG2_WIDEFIFO);
2509
2510 while (left_io) {
2511 unsigned char *virt, *base = NULL;
2512 unsigned long flags = 0;
2513 size_t len = left_io;
2514
2515 if (srb->cmd->use_sg) {
2516 size_t offset = srb->request_length - left_io;
2517 local_irq_save(flags);
2518 /* Again, max 4 bytes */
2519 base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
2520 srb->sg_count, &offset, &len);
2521 virt = base + offset;
2522 } else {
2523 virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
2524 len = left_io;
2525 }
2526 left_io -= len;
2527
2528 while (len--) {
2529 if (debug_enabled(DBG_PIO))
2530 printk(" %02x", *virt);
2531
2532 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2533
2534 sg_subtract_one(srb);
2535 }
2536
2537 if (srb->cmd->use_sg) {
2538 scsi_kunmap_atomic_sg(base);
2539 local_irq_restore(flags);
2540 }
2541 }
2542 if (srb->dcb->sync_period & WIDE_SYNC) {
2543 if (ln % 2) {
2544 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2545 if (debug_enabled(DBG_PIO))
2546 printk(" |00");
2547 }
2548 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2549 }
2550 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2551 if (debug_enabled(DBG_PIO))
2552 printk("\n");
2553 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2554 SCMD_FIFO_OUT);
2555 }
2556 }
2557 #endif /* DC395x_LASTPIO */
2558 else { /* xfer pad */
2559 u8 data = 0, data2 = 0;
2560 if (srb->sg_count) {
2561 srb->adapter_status = H_OVER_UNDER_RUN;
2562 srb->status |= OVER_RUN;
2563 }
2564 /*
2565 * KG: despite the fact that we are using 16 bits I/O ops
2566 * the SCSI FIFO is only 8 bits according to the docs
2567 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2568 */
2569 if (dcb->sync_period & WIDE_SYNC) {
2570 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2571 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2572 CFG2_WIDEFIFO);
2573 if (io_dir & DMACMD_DIR) {
2574 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2575 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2576 } else {
2577 /* Danger, Robinson: If you find KGs
2578 * scattered over the wide disk, the driver
2579 * or chip is to blame :-( */
2580 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2581 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2582 }
2583 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2584 } else {
2585 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2586 /* Danger, Robinson: If you find a collection of Ks on your disk
2587 * something broke :-( */
2588 if (io_dir & DMACMD_DIR)
2589 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2590 else
2591 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2592 }
2593 srb->state |= SRB_XFERPAD;
2594 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2595 /* SCSI command */
2596 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2597 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2598 }
2599 }
2600
2601
2602 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2603 u16 *pscsi_status)
2604 {
2605 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
2606 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2607 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2608 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2609 srb->state = SRB_COMPLETED;
2610 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2611 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2612 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2613 }
2614
2615
2616 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2617 u16 *pscsi_status)
2618 {
2619 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
2620 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2621 srb->state = SRB_STATUS;
2622 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2623 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2624 }
2625
2626
2627 /* Check if the message is complete */
2628 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2629 {
2630 if (*msgbuf == EXTENDED_MESSAGE) {
2631 if (len < 2)
2632 return 0;
2633 if (len < msgbuf[1] + 2)
2634 return 0;
2635 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2636 if (len < 2)
2637 return 0;
2638 return 1;
2639 }
2640
2641 /* reject_msg */
2642 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2643 struct ScsiReqBlk *srb)
2644 {
2645 srb->msgout_buf[0] = MESSAGE_REJECT;
2646 srb->msg_count = 1;
2647 DC395x_ENABLE_MSGOUT;
2648 srb->state &= ~SRB_MSGIN;
2649 srb->state |= SRB_MSGOUT;
2650 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2651 srb->msgin_buf[0],
2652 srb->dcb->target_id, srb->dcb->target_lun);
2653 }
2654
2655
2656 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2657 struct DeviceCtlBlk *dcb, u8 tag)
2658 {
2659 struct ScsiReqBlk *srb = NULL;
2660 struct ScsiReqBlk *i;
2661 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
2662 srb->cmd->pid, tag, srb);
2663
2664 if (!(dcb->tag_mask & (1 << tag)))
2665 dprintkl(KERN_DEBUG,
2666 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2667 dcb->tag_mask, tag);
2668
2669 if (list_empty(&dcb->srb_going_list))
2670 goto mingx0;
2671 list_for_each_entry(i, &dcb->srb_going_list, list) {
2672 if (i->tag_number == tag) {
2673 srb = i;
2674 break;
2675 }
2676 }
2677 if (!srb)
2678 goto mingx0;
2679
2680 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
2681 srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun);
2682 if (dcb->flag & ABORT_DEV_) {
2683 /*srb->state = SRB_ABORT_SENT; */
2684 enable_msgout_abort(acb, srb);
2685 }
2686
2687 if (!(srb->state & SRB_DISCONNECT))
2688 goto mingx0;
2689
2690 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2691 srb->state |= dcb->active_srb->state;
2692 srb->state |= SRB_DATA_XFER;
2693 dcb->active_srb = srb;
2694 /* How can we make the DORS happy? */
2695 return srb;
2696
2697 mingx0:
2698 srb = acb->tmp_srb;
2699 srb->state = SRB_UNEXPECT_RESEL;
2700 dcb->active_srb = srb;
2701 srb->msgout_buf[0] = MSG_ABORT_TAG;
2702 srb->msg_count = 1;
2703 DC395x_ENABLE_MSGOUT;
2704 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2705 return srb;
2706 }
2707
2708
2709 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2710 struct DeviceCtlBlk *dcb)
2711 {
2712 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2713 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2714 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2715 set_xfer_rate(acb, dcb);
2716 }
2717
2718
2719 /* set async transfer mode */
2720 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2721 {
2722 struct DeviceCtlBlk *dcb = srb->dcb;
2723 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2724 dcb->target_id, dcb->target_lun);
2725
2726 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2727 dcb->sync_mode |= SYNC_NEGO_DONE;
2728 /*dcb->sync_period &= 0; */
2729 dcb->sync_offset = 0;
2730 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2731 srb->state &= ~SRB_DO_SYNC_NEGO;
2732 reprogram_regs(acb, dcb);
2733 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2734 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2735 build_wdtr(acb, dcb, srb);
2736 DC395x_ENABLE_MSGOUT;
2737 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2738 }
2739 }
2740
2741
2742 /* set sync transfer mode */
2743 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2744 {
2745 struct DeviceCtlBlk *dcb = srb->dcb;
2746 u8 bval;
2747 int fact;
2748 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2749 "(%02i.%01i MHz) Offset %i\n",
2750 dcb->target_id, srb->msgin_buf[3] << 2,
2751 (250 / srb->msgin_buf[3]),
2752 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2753 srb->msgin_buf[4]);
2754
2755 if (srb->msgin_buf[4] > 15)
2756 srb->msgin_buf[4] = 15;
2757 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2758 dcb->sync_offset = 0;
2759 else if (dcb->sync_offset == 0)
2760 dcb->sync_offset = srb->msgin_buf[4];
2761 if (srb->msgin_buf[4] > dcb->sync_offset)
2762 srb->msgin_buf[4] = dcb->sync_offset;
2763 else
2764 dcb->sync_offset = srb->msgin_buf[4];
2765 bval = 0;
2766 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2767 || dcb->min_nego_period >
2768 clock_period[bval]))
2769 bval++;
2770 if (srb->msgin_buf[3] < clock_period[bval])
2771 dprintkl(KERN_INFO,
2772 "msgin_set_sync: Increase sync nego period to %ins\n",
2773 clock_period[bval] << 2);
2774 srb->msgin_buf[3] = clock_period[bval];
2775 dcb->sync_period &= 0xf0;
2776 dcb->sync_period |= ALT_SYNC | bval;
2777 dcb->min_nego_period = srb->msgin_buf[3];
2778
2779 if (dcb->sync_period & WIDE_SYNC)
2780 fact = 500;
2781 else
2782 fact = 250;
2783
2784 dprintkl(KERN_INFO,
2785 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2786 dcb->target_id, (fact == 500) ? "Wide16" : "",
2787 dcb->min_nego_period << 2, dcb->sync_offset,
2788 (fact / dcb->min_nego_period),
2789 ((fact % dcb->min_nego_period) * 10 +
2790 dcb->min_nego_period / 2) / dcb->min_nego_period);
2791
2792 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2793 /* Reply with corrected SDTR Message */
2794 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2795 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2796
2797 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2798 srb->msg_count = 5;
2799 DC395x_ENABLE_MSGOUT;
2800 dcb->sync_mode |= SYNC_NEGO_DONE;
2801 } else {
2802 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2803 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2804 build_wdtr(acb, dcb, srb);
2805 DC395x_ENABLE_MSGOUT;
2806 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2807 }
2808 }
2809 srb->state &= ~SRB_DO_SYNC_NEGO;
2810 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2811
2812 reprogram_regs(acb, dcb);
2813 }
2814
2815
2816 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2817 struct ScsiReqBlk *srb)
2818 {
2819 struct DeviceCtlBlk *dcb = srb->dcb;
2820 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2821
2822 dcb->sync_period &= ~WIDE_SYNC;
2823 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2824 dcb->sync_mode |= WIDE_NEGO_DONE;
2825 srb->state &= ~SRB_DO_WIDE_NEGO;
2826 reprogram_regs(acb, dcb);
2827 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2828 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2829 build_sdtr(acb, dcb, srb);
2830 DC395x_ENABLE_MSGOUT;
2831 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2832 }
2833 }
2834
2835 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2836 {
2837 struct DeviceCtlBlk *dcb = srb->dcb;
2838 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2839 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2840 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2841
2842 if (srb->msgin_buf[3] > wide)
2843 srb->msgin_buf[3] = wide;
2844 /* Completed */
2845 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2846 dprintkl(KERN_DEBUG,
2847 "msgin_set_wide: Wide nego initiated <%02i>\n",
2848 dcb->target_id);
2849 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2850 srb->msg_count = 4;
2851 srb->state |= SRB_DO_WIDE_NEGO;
2852 DC395x_ENABLE_MSGOUT;
2853 }
2854
2855 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2856 if (srb->msgin_buf[3] > 0)
2857 dcb->sync_period |= WIDE_SYNC;
2858 else
2859 dcb->sync_period &= ~WIDE_SYNC;
2860 srb->state &= ~SRB_DO_WIDE_NEGO;
2861 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2862 dprintkdbg(DBG_1,
2863 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2864 (8 << srb->msgin_buf[3]), dcb->target_id);
2865 reprogram_regs(acb, dcb);
2866 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2867 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2868 build_sdtr(acb, dcb, srb);
2869 DC395x_ENABLE_MSGOUT;
2870 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2871 }
2872 }
2873
2874
2875 /*
2876 * extended message codes:
2877 *
2878 * code description
2879 *
2880 * 02h Reserved
2881 * 00h MODIFY DATA POINTER
2882 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2883 * 03h WIDE DATA TRANSFER REQUEST
2884 * 04h - 7Fh Reserved
2885 * 80h - FFh Vendor specific
2886 */
2887 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2888 u16 *pscsi_status)
2889 {
2890 struct DeviceCtlBlk *dcb = acb->active_dcb;
2891 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid);
2892
2893 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2894 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2895 /* Now eval the msg */
2896 switch (srb->msgin_buf[0]) {
2897 case DISCONNECT:
2898 srb->state = SRB_DISCONNECT;
2899 break;
2900
2901 case SIMPLE_QUEUE_TAG:
2902 case HEAD_OF_QUEUE_TAG:
2903 case ORDERED_QUEUE_TAG:
2904 srb =
2905 msgin_qtag(acb, dcb,
2906 srb->msgin_buf[1]);
2907 break;
2908
2909 case MESSAGE_REJECT:
2910 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2911 DO_CLRATN | DO_DATALATCH);
2912 /* A sync nego message was rejected ! */
2913 if (srb->state & SRB_DO_SYNC_NEGO) {
2914 msgin_set_async(acb, srb);
2915 break;
2916 }
2917 /* A wide nego message was rejected ! */
2918 if (srb->state & SRB_DO_WIDE_NEGO) {
2919 msgin_set_nowide(acb, srb);
2920 break;
2921 }
2922 enable_msgout_abort(acb, srb);
2923 /*srb->state |= SRB_ABORT_SENT */
2924 break;
2925
2926 case EXTENDED_MESSAGE:
2927 /* SDTR */
2928 if (srb->msgin_buf[1] == 3
2929 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2930 msgin_set_sync(acb, srb);
2931 break;
2932 }
2933 /* WDTR */
2934 if (srb->msgin_buf[1] == 2
2935 && srb->msgin_buf[2] == EXTENDED_WDTR
2936 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2937 msgin_set_wide(acb, srb);
2938 break;
2939 }
2940 msgin_reject(acb, srb);
2941 break;
2942
2943 case MSG_IGNOREWIDE:
2944 /* Discard wide residual */
2945 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2946 break;
2947
2948 case COMMAND_COMPLETE:
2949 /* nothing has to be done */
2950 break;
2951
2952 case SAVE_POINTERS:
2953 /*
2954 * SAVE POINTER may be ignored as we have the struct
2955 * ScsiReqBlk* associated with the scsi command.
2956 */
2957 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2958 "SAVE POINTER rem=%i Ignore\n",
2959 srb->cmd->pid, srb->total_xfer_length);
2960 break;
2961
2962 case RESTORE_POINTERS:
2963 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2964 break;
2965
2966 case ABORT:
2967 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2968 "<%02i-%i> ABORT msg\n",
2969 srb->cmd->pid, dcb->target_id,
2970 dcb->target_lun);
2971 dcb->flag |= ABORT_DEV_;
2972 enable_msgout_abort(acb, srb);
2973 break;
2974
2975 default:
2976 /* reject unknown messages */
2977 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2978 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2979 srb->msg_count = 1;
2980 srb->msgout_buf[0] = dcb->identify_msg;
2981 DC395x_ENABLE_MSGOUT;
2982 srb->state |= SRB_MSGOUT;
2983 /*break; */
2984 }
2985 msgin_reject(acb, srb);
2986 }
2987
2988 /* Clear counter and MsgIn state */
2989 srb->state &= ~SRB_MSGIN;
2990 acb->msg_len = 0;
2991 }
2992 *pscsi_status = PH_BUS_FREE;
2993 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2994 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2995 }
2996
2997
2998 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2999 u16 *pscsi_status)
3000 {
3001 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid);
3002 clear_fifo(acb, "msgin_phase1");
3003 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
3004 if (!(srb->state & SRB_MSGIN)) {
3005 srb->state &= ~SRB_DISCONNECT;
3006 srb->state |= SRB_MSGIN;
3007 }
3008 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3009 /* SCSI command */
3010 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
3011 }
3012
3013
3014 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3015 u16 *pscsi_status)
3016 {
3017 }
3018
3019
3020 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3021 u16 *pscsi_status)
3022 {
3023 }
3024
3025
3026 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3027 {
3028 struct DeviceCtlBlk *i;
3029
3030 /* set all lun device's period, offset */
3031 if (dcb->identify_msg & 0x07)
3032 return;
3033
3034 if (acb->scan_devices) {
3035 current_sync_offset = dcb->sync_offset;
3036 return;
3037 }
3038
3039 list_for_each_entry(i, &acb->dcb_list, list)
3040 if (i->target_id == dcb->target_id) {
3041 i->sync_period = dcb->sync_period;
3042 i->sync_offset = dcb->sync_offset;
3043 i->sync_mode = dcb->sync_mode;
3044 i->min_nego_period = dcb->min_nego_period;
3045 }
3046 }
3047
3048
3049 static void disconnect(struct AdapterCtlBlk *acb)
3050 {
3051 struct DeviceCtlBlk *dcb = acb->active_dcb;
3052 struct ScsiReqBlk *srb;
3053
3054 if (!dcb) {
3055 dprintkl(KERN_ERR, "disconnect: No such device\n");
3056 udelay(500);
3057 /* Suspend queue for a while */
3058 acb->scsi_host->last_reset =
3059 jiffies + HZ / 2 +
3060 HZ * acb->eeprom.delay_time;
3061 clear_fifo(acb, "disconnectEx");
3062 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3063 return;
3064 }
3065 srb = dcb->active_srb;
3066 acb->active_dcb = NULL;
3067 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid);
3068
3069 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3070 clear_fifo(acb, "disconnect");
3071 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3072 if (srb->state & SRB_UNEXPECT_RESEL) {
3073 dprintkl(KERN_ERR,
3074 "disconnect: Unexpected reselection <%02i-%i>\n",
3075 dcb->target_id, dcb->target_lun);
3076 srb->state = 0;
3077 waiting_process_next(acb);
3078 } else if (srb->state & SRB_ABORT_SENT) {
3079 dcb->flag &= ~ABORT_DEV_;
3080 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3081 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3082 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3083 waiting_process_next(acb);
3084 } else {
3085 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3086 || !(srb->
3087 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3088 /*
3089 * Selection time out
3090 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3091 */
3092 /* Unexp. Disc / Sel Timeout */
3093 if (srb->state != SRB_START_
3094 && srb->state != SRB_MSGOUT) {
3095 srb->state = SRB_READY;
3096 dprintkl(KERN_DEBUG,
3097 "disconnect: (pid#%li) Unexpected\n",
3098 srb->cmd->pid);
3099 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3100 goto disc1;
3101 } else {
3102 /* Normal selection timeout */
3103 dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
3104 "<%02i-%i> SelTO\n", srb->cmd->pid,
3105 dcb->target_id, dcb->target_lun);
3106 if (srb->retry_count++ > DC395x_MAX_RETRIES
3107 || acb->scan_devices) {
3108 srb->target_status =
3109 SCSI_STAT_SEL_TIMEOUT;
3110 goto disc1;
3111 }
3112 free_tag(dcb, srb);
3113 srb_going_to_waiting_move(dcb, srb);
3114 dprintkdbg(DBG_KG,
3115 "disconnect: (pid#%li) Retry\n",
3116 srb->cmd->pid);
3117 waiting_set_timer(acb, HZ / 20);
3118 }
3119 } else if (srb->state & SRB_DISCONNECT) {
3120 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3121 /*
3122 * SRB_DISCONNECT (This is what we expect!)
3123 */
3124 if (bval & 0x40) {
3125 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3126 " 0x%02x: ACK set! Other controllers?\n",
3127 bval);
3128 /* It could come from another initiator, therefore don't do much ! */
3129 } else
3130 waiting_process_next(acb);
3131 } else if (srb->state & SRB_COMPLETED) {
3132 disc1:
3133 /*
3134 ** SRB_COMPLETED
3135 */
3136 free_tag(dcb, srb);
3137 dcb->active_srb = NULL;
3138 srb->state = SRB_FREE;
3139 srb_done(acb, dcb, srb);
3140 }
3141 }
3142 }
3143
3144
3145 static void reselect(struct AdapterCtlBlk *acb)
3146 {
3147 struct DeviceCtlBlk *dcb = acb->active_dcb;
3148 struct ScsiReqBlk *srb = NULL;
3149 u16 rsel_tar_lun_id;
3150 u8 id, lun;
3151 u8 arblostflag = 0;
3152 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3153
3154 clear_fifo(acb, "reselect");
3155 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3156 /* Read Reselected Target ID and LUN */
3157 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3158 if (dcb) { /* Arbitration lost but Reselection win */
3159 srb = dcb->active_srb;
3160 if (!srb) {
3161 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3162 "but active_srb == NULL\n");
3163 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3164 return;
3165 }
3166 /* Why the if ? */
3167 if (!acb->scan_devices) {
3168 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
3169 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3170 srb->cmd->pid, dcb->target_id,
3171 dcb->target_lun, rsel_tar_lun_id,
3172 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3173 arblostflag = 1;
3174 /*srb->state |= SRB_DISCONNECT; */
3175
3176 srb->state = SRB_READY;
3177 free_tag(dcb, srb);
3178 srb_going_to_waiting_move(dcb, srb);
3179 waiting_set_timer(acb, HZ / 20);
3180
3181 /* return; */
3182 }
3183 }
3184 /* Read Reselected Target Id and LUN */
3185 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3186 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3187 "Got %i!\n", rsel_tar_lun_id);
3188 id = rsel_tar_lun_id & 0xff;
3189 lun = (rsel_tar_lun_id >> 8) & 7;
3190 dcb = find_dcb(acb, id, lun);
3191 if (!dcb) {
3192 dprintkl(KERN_ERR, "reselect: From non existent device "
3193 "<%02i-%i>\n", id, lun);
3194 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3195 return;
3196 }
3197 acb->active_dcb = dcb;
3198
3199 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3200 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3201 "disconnection? <%02i-%i>\n",
3202 dcb->target_id, dcb->target_lun);
3203
3204 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3205 srb = acb->tmp_srb;
3206 dcb->active_srb = srb;
3207 } else {
3208 /* There can be only one! */
3209 srb = dcb->active_srb;
3210 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3211 /*
3212 * abort command
3213 */
3214 dprintkl(KERN_DEBUG,
3215 "reselect: w/o disconnected cmds <%02i-%i>\n",
3216 dcb->target_id, dcb->target_lun);
3217 srb = acb->tmp_srb;
3218 srb->state = SRB_UNEXPECT_RESEL;
3219 dcb->active_srb = srb;
3220 enable_msgout_abort(acb, srb);
3221 } else {
3222 if (dcb->flag & ABORT_DEV_) {
3223 /*srb->state = SRB_ABORT_SENT; */
3224 enable_msgout_abort(acb, srb);
3225 } else
3226 srb->state = SRB_DATA_XFER;
3227
3228 }
3229 }
3230 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3231
3232 /* Program HA ID, target ID, period and offset */
3233 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3234 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3235 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3236 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3237 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3238 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3239 /* SCSI command */
3240 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3241 }
3242
3243
3244 static inline u8 tagq_blacklist(char *name)
3245 {
3246 #ifndef DC395x_NO_TAGQ
3247 #if 0
3248 u8 i;
3249 for (i = 0; i < BADDEVCNT; i++)
3250 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3251 return 1;
3252 #endif
3253 return 0;
3254 #else
3255 return 1;
3256 #endif
3257 }
3258
3259
3260 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3261 {
3262 /* Check for SCSI format (ANSI and Response data format) */
3263 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3264 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3265 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3266 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3267 /* ((dcb->dev_type == TYPE_DISK)
3268 || (dcb->dev_type == TYPE_MOD)) && */
3269 !tagq_blacklist(((char *)ptr) + 8)) {
3270 if (dcb->max_command == 1)
3271 dcb->max_command =
3272 dcb->acb->tag_max_num;
3273 dcb->sync_mode |= EN_TAG_QUEUEING;
3274 /*dcb->tag_mask = 0; */
3275 } else
3276 dcb->max_command = 1;
3277 }
3278 }
3279
3280
3281 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3282 struct ScsiInqData *ptr)
3283 {
3284 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3285 dcb->dev_type = bval1;
3286 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3287 disc_tagq_set(dcb, ptr);
3288 }
3289
3290
3291 /* unmap mapped pci regions from SRB */
3292 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3293 {
3294 struct scsi_cmnd *cmd = srb->cmd;
3295 enum dma_data_direction dir = cmd->sc_data_direction;
3296 if (cmd->use_sg && dir != PCI_DMA_NONE) {
3297 /* unmap DC395x SG list */
3298 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3299 srb->sg_bus_addr, SEGMENTX_LEN);
3300 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3301 SEGMENTX_LEN,
3302 PCI_DMA_TODEVICE);
3303 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3304 cmd->use_sg, cmd->request_buffer);
3305 /* unmap the sg segments */
3306 pci_unmap_sg(acb->dev,
3307 (struct scatterlist *)cmd->request_buffer,
3308 cmd->use_sg, dir);
3309 } else if (cmd->request_buffer && dir != PCI_DMA_NONE) {
3310 dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n",
3311 srb->segment_x[0].address, cmd->request_bufflen);
3312 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3313 cmd->request_bufflen, dir);
3314 }
3315 }
3316
3317
3318 /* unmap mapped pci sense buffer from SRB */
3319 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3320 struct ScsiReqBlk *srb)
3321 {
3322 if (!(srb->flag & AUTO_REQSENSE))
3323 return;
3324 /* Unmap sense buffer */
3325 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3326 srb->segment_x[0].address);
3327 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3328 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3329 /* Restore SG stuff */
3330 srb->total_xfer_length = srb->xferred;
3331 srb->segment_x[0].address =
3332 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3333 srb->segment_x[0].length =
3334 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3335 }
3336
3337
3338 /*
3339 * Complete execution of a SCSI command
3340 * Signal completion to the generic SCSI driver
3341 */
3342 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3343 struct ScsiReqBlk *srb)
3344 {
3345 u8 tempcnt, status;
3346 struct scsi_cmnd *cmd = srb->cmd;
3347 enum dma_data_direction dir = cmd->sc_data_direction;
3348 int ckc_only = 1;
3349
3350 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid,
3351 srb->cmd->device->id, srb->cmd->device->lun);
3352 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3353 srb, cmd->use_sg, srb->sg_index, srb->sg_count,
3354 cmd->request_buffer);
3355 status = srb->target_status;
3356 if (srb->flag & AUTO_REQSENSE) {
3357 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3358 pci_unmap_srb_sense(acb, srb);
3359 /*
3360 ** target status..........................
3361 */
3362 srb->flag &= ~AUTO_REQSENSE;
3363 srb->adapter_status = 0;
3364 srb->target_status = CHECK_CONDITION << 1;
3365 if (debug_enabled(DBG_1)) {
3366 switch (cmd->sense_buffer[2] & 0x0f) {
3367 case NOT_READY:
3368 dprintkl(KERN_DEBUG,
3369 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3370 cmd->cmnd[0], dcb->target_id,
3371 dcb->target_lun, status, acb->scan_devices);
3372 break;
3373 case UNIT_ATTENTION:
3374 dprintkl(KERN_DEBUG,
3375 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3376 cmd->cmnd[0], dcb->target_id,
3377 dcb->target_lun, status, acb->scan_devices);
3378 break;
3379 case ILLEGAL_REQUEST:
3380 dprintkl(KERN_DEBUG,
3381 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3382 cmd->cmnd[0], dcb->target_id,
3383 dcb->target_lun, status, acb->scan_devices);
3384 break;
3385 case MEDIUM_ERROR:
3386 dprintkl(KERN_DEBUG,
3387 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3388 cmd->cmnd[0], dcb->target_id,
3389 dcb->target_lun, status, acb->scan_devices);
3390 break;
3391 case HARDWARE_ERROR:
3392 dprintkl(KERN_DEBUG,
3393 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3394 cmd->cmnd[0], dcb->target_id,
3395 dcb->target_lun, status, acb->scan_devices);
3396 break;
3397 }
3398 if (cmd->sense_buffer[7] >= 6)
3399 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3400 "(0x%08x 0x%08x)\n",
3401 cmd->sense_buffer[2], cmd->sense_buffer[12],
3402 cmd->sense_buffer[13],
3403 *((unsigned int *)(cmd->sense_buffer + 3)),
3404 *((unsigned int *)(cmd->sense_buffer + 8)));
3405 else
3406 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3407 cmd->sense_buffer[2],
3408 *((unsigned int *)(cmd->sense_buffer + 3)));
3409 }
3410
3411 if (status == (CHECK_CONDITION << 1)) {
3412 cmd->result = DID_BAD_TARGET << 16;
3413 goto ckc_e;
3414 }
3415 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3416
3417 if (srb->total_xfer_length
3418 && srb->total_xfer_length >= cmd->underflow)
3419 cmd->result =
3420 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3421 srb->end_message, CHECK_CONDITION);
3422 /*SET_RES_DID(cmd->result,DID_OK) */
3423 else
3424 cmd->result =
3425 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3426 srb->end_message, CHECK_CONDITION);
3427
3428 goto ckc_e;
3429 }
3430
3431 /*************************************************************/
3432 if (status) {
3433 /*
3434 * target status..........................
3435 */
3436 if (status_byte(status) == CHECK_CONDITION) {
3437 request_sense(acb, dcb, srb);
3438 return;
3439 } else if (status_byte(status) == QUEUE_FULL) {
3440 tempcnt = (u8)list_size(&dcb->srb_going_list);
3441 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3442 dcb->target_id, dcb->target_lun, tempcnt);
3443 if (tempcnt > 1)
3444 tempcnt--;
3445 dcb->max_command = tempcnt;
3446 free_tag(dcb, srb);
3447 srb_going_to_waiting_move(dcb, srb);
3448 waiting_set_timer(acb, HZ / 20);
3449 srb->adapter_status = 0;
3450 srb->target_status = 0;
3451 return;
3452 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3453 srb->adapter_status = H_SEL_TIMEOUT;
3454 srb->target_status = 0;
3455 cmd->result = DID_NO_CONNECT << 16;
3456 } else {
3457 srb->adapter_status = 0;
3458 SET_RES_DID(cmd->result, DID_ERROR);
3459 SET_RES_MSG(cmd->result, srb->end_message);
3460 SET_RES_TARGET(cmd->result, status);
3461
3462 }
3463 } else {
3464 /*
3465 ** process initiator status..........................
3466 */
3467 status = srb->adapter_status;
3468 if (status & H_OVER_UNDER_RUN) {
3469 srb->target_status = 0;
3470 SET_RES_DID(cmd->result, DID_OK);
3471 SET_RES_MSG(cmd->result, srb->end_message);
3472 } else if (srb->status & PARITY_ERROR) {
3473 SET_RES_DID(cmd->result, DID_PARITY);
3474 SET_RES_MSG(cmd->result, srb->end_message);
3475 } else { /* No error */
3476
3477 srb->adapter_status = 0;
3478 srb->target_status = 0;
3479 SET_RES_DID(cmd->result, DID_OK);
3480 }
3481 }
3482
3483 if (dir != PCI_DMA_NONE) {
3484 if (cmd->use_sg)
3485 pci_dma_sync_sg_for_cpu(acb->dev,
3486 (struct scatterlist *)cmd->
3487 request_buffer, cmd->use_sg, dir);
3488 else if (cmd->request_buffer)
3489 pci_dma_sync_single_for_cpu(acb->dev,
3490 srb->segment_x[0].address,
3491 cmd->request_bufflen, dir);
3492 }
3493 ckc_only = 0;
3494 /* Check Error Conditions */
3495 ckc_e:
3496
3497 if (cmd->cmnd[0] == INQUIRY) {
3498 unsigned char *base = NULL;
3499 struct ScsiInqData *ptr;
3500 unsigned long flags = 0;
3501
3502 if (cmd->use_sg) {
3503 struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer;
3504 size_t offset = 0, len = sizeof(struct ScsiInqData);
3505
3506 local_irq_save(flags);
3507 base = scsi_kmap_atomic_sg(sg, cmd->use_sg, &offset, &len);
3508 ptr = (struct ScsiInqData *)(base + offset);
3509 } else
3510 ptr = (struct ScsiInqData *)(cmd->request_buffer);
3511
3512 if (!ckc_only && (cmd->result & RES_DID) == 0
3513 && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8
3514 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3515 dcb->inquiry7 = ptr->Flags;
3516
3517 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3518 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3519 if ((cmd->result == (DID_OK << 16)
3520 || status_byte(cmd->result) &
3521 CHECK_CONDITION)) {
3522 if (!dcb->init_tcq_flag) {
3523 add_dev(acb, dcb, ptr);
3524 dcb->init_tcq_flag = 1;
3525 }
3526 }
3527
3528 if (cmd->use_sg) {
3529 scsi_kunmap_atomic_sg(base);
3530 local_irq_restore(flags);
3531 }
3532 }
3533
3534 /* Here is the info for Doug Gilbert's sg3 ... */
3535 cmd->resid = srb->total_xfer_length;
3536 /* This may be interpreted by sb. or not ... */
3537 cmd->SCp.this_residual = srb->total_xfer_length;
3538 cmd->SCp.buffers_residual = 0;
3539 if (debug_enabled(DBG_KG)) {
3540 if (srb->total_xfer_length)
3541 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
3542 "cmnd=0x%02x Missed %i bytes\n",
3543 cmd->pid, cmd->device->id, cmd->device->lun,
3544 cmd->cmnd[0], srb->total_xfer_length);
3545 }
3546
3547 srb_going_remove(dcb, srb);
3548 /* Add to free list */
3549 if (srb == acb->tmp_srb)
3550 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3551 else {
3552 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
3553 cmd->pid, cmd->result);
3554 srb_free_insert(acb, srb);
3555 }
3556 pci_unmap_srb(acb, srb);
3557
3558 cmd->scsi_done(cmd);
3559 waiting_process_next(acb);
3560 }
3561
3562
3563 /* abort all cmds in our queues */
3564 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3565 struct scsi_cmnd *cmd, u8 force)
3566 {
3567 struct DeviceCtlBlk *dcb;
3568 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3569
3570 list_for_each_entry(dcb, &acb->dcb_list, list) {
3571 struct ScsiReqBlk *srb;
3572 struct ScsiReqBlk *tmp;
3573 struct scsi_cmnd *p;
3574
3575 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3576 enum dma_data_direction dir;
3577 int result;
3578
3579 p = srb->cmd;
3580 dir = p->sc_data_direction;
3581 result = MK_RES(0, did_flag, 0, 0);
3582 printk("G:%li(%02i-%i) ", p->pid,
3583 p->device->id, p->device->lun);
3584 srb_going_remove(dcb, srb);
3585 free_tag(dcb, srb);
3586 srb_free_insert(acb, srb);
3587 p->result = result;
3588 pci_unmap_srb_sense(acb, srb);
3589 pci_unmap_srb(acb, srb);
3590 if (force) {
3591 /* For new EH, we normally don't need to give commands back,
3592 * as they all complete or all time out */
3593 p->scsi_done(p);
3594 }
3595 }
3596 if (!list_empty(&dcb->srb_going_list))
3597 dprintkl(KERN_DEBUG,
3598 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3599 dcb->target_id, dcb->target_lun);
3600 if (dcb->tag_mask)
3601 dprintkl(KERN_DEBUG,
3602 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3603 dcb->target_id, dcb->target_lun,
3604 dcb->tag_mask);
3605
3606 /* Waiting queue */
3607 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3608 int result;
3609 p = srb->cmd;
3610
3611 result = MK_RES(0, did_flag, 0, 0);
3612 printk("W:%li<%02i-%i>", p->pid, p->device->id,
3613 p->device->lun);
3614 srb_waiting_remove(dcb, srb);
3615 srb_free_insert(acb, srb);
3616 p->result = result;
3617 pci_unmap_srb_sense(acb, srb);
3618 pci_unmap_srb(acb, srb);
3619 if (force) {
3620 /* For new EH, we normally don't need to give commands back,
3621 * as they all complete or all time out */
3622 cmd->scsi_done(cmd);
3623 }
3624 }
3625 if (!list_empty(&dcb->srb_waiting_list))
3626 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3627 list_size(&dcb->srb_waiting_list), dcb->target_id,
3628 dcb->target_lun);
3629 dcb->flag &= ~ABORT_DEV_;
3630 }
3631 printk("\n");
3632 }
3633
3634
3635 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3636 {
3637 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3638 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3639 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3640
3641 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3642 /* nothing */;
3643 }
3644
3645
3646 static void set_basic_config(struct AdapterCtlBlk *acb)
3647 {
3648 u8 bval;
3649 u16 wval;
3650 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3651 if (acb->config & HCC_PARITY)
3652 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3653 else
3654 bval = PHASELATCH | INITIATOR | BLOCKRST;
3655
3656 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3657
3658 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3659 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3660 /* program Host ID */
3661 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3662 /* set ansynchronous transfer */
3663 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3664 /* Turn LED control off */
3665 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3666 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3667 /* DMA config */
3668 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3669 wval |=
3670 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3671 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3672 /* Clear pending interrupt status */
3673 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3674 /* Enable SCSI interrupt */
3675 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3676 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3677 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3678 );
3679 }
3680
3681
3682 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3683 {
3684 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3685 /* delay half a second */
3686 if (timer_pending(&acb->waiting_timer))
3687 del_timer(&acb->waiting_timer);
3688
3689 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3690 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3691 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3692 udelay(500);
3693 /* Maybe we locked up the bus? Then lets wait even longer ... */
3694 acb->scsi_host->last_reset =
3695 jiffies + 5 * HZ / 2 +
3696 HZ * acb->eeprom.delay_time;
3697
3698 clear_fifo(acb, "scsi_reset_detect");
3699 set_basic_config(acb);
3700 /*1.25 */
3701 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3702
3703 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3704 acb->acb_flag |= RESET_DONE;
3705 } else {
3706 acb->acb_flag |= RESET_DETECT;
3707 reset_dev_param(acb);
3708 doing_srb_done(acb, DID_RESET, NULL, 1);
3709 /*DC395x_RecoverSRB( acb ); */
3710 acb->active_dcb = NULL;
3711 acb->acb_flag = 0;
3712 waiting_process_next(acb);
3713 }
3714 }
3715
3716
3717 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3718 struct ScsiReqBlk *srb)
3719 {
3720 struct scsi_cmnd *cmd = srb->cmd;
3721 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
3722 cmd->pid, cmd->device->id, cmd->device->lun);
3723
3724 srb->flag |= AUTO_REQSENSE;
3725 srb->adapter_status = 0;
3726 srb->target_status = 0;
3727
3728 /* KG: Can this prevent crap sense data ? */
3729 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3730
3731 /* Save some data */
3732 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3733 srb->segment_x[0].address;
3734 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3735 srb->segment_x[0].length;
3736 srb->xferred = srb->total_xfer_length;
3737 /* srb->segment_x : a one entry of S/G list table */
3738 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3739 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3740 /* Map sense buffer */
3741 srb->segment_x[0].address =
3742 pci_map_single(acb->dev, cmd->sense_buffer,
3743 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3744 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3745 cmd->sense_buffer, srb->segment_x[0].address,
3746 SCSI_SENSE_BUFFERSIZE);
3747 srb->sg_count = 1;
3748 srb->sg_index = 0;
3749
3750 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3751 dprintkl(KERN_DEBUG,
3752 "request_sense: (pid#%li) failed <%02i-%i>\n",
3753 srb->cmd->pid, dcb->target_id, dcb->target_lun);
3754 srb_going_to_waiting_move(dcb, srb);
3755 waiting_set_timer(acb, HZ / 100);
3756 }
3757 }
3758
3759
3760 /**
3761 * device_alloc - Allocate a new device instance. This create the
3762 * devices instance and sets up all the data items. The adapter
3763 * instance is required to obtain confiuration information for this
3764 * device. This does *not* add this device to the adapters device
3765 * list.
3766 *
3767 * @acb: The adapter to obtain configuration information from.
3768 * @target: The target for the new device.
3769 * @lun: The lun for the new device.
3770 *
3771 * Return the new device if successful or NULL on failure.
3772 **/
3773 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3774 u8 target, u8 lun)
3775 {
3776 struct NvRamType *eeprom = &acb->eeprom;
3777 u8 period_index = eeprom->target[target].period & 0x07;
3778 struct DeviceCtlBlk *dcb;
3779
3780 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3781 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3782 if (!dcb)
3783 return NULL;
3784 dcb->acb = NULL;
3785 INIT_LIST_HEAD(&dcb->srb_going_list);
3786 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3787 dcb->active_srb = NULL;
3788 dcb->tag_mask = 0;
3789 dcb->max_command = 1;
3790 dcb->target_id = target;
3791 dcb->target_lun = lun;
3792 #ifndef DC395x_NO_DISCONNECT
3793 dcb->identify_msg =
3794 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3795 #else
3796 dcb->identify_msg = IDENTIFY(0, lun);
3797 #endif
3798 dcb->dev_mode = eeprom->target[target].cfg0;
3799 dcb->inquiry7 = 0;
3800 dcb->sync_mode = 0;
3801 dcb->min_nego_period = clock_period[period_index];
3802 dcb->sync_period = 0;
3803 dcb->sync_offset = 0;
3804 dcb->flag = 0;
3805
3806 #ifndef DC395x_NO_WIDE
3807 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3808 && (acb->config & HCC_WIDE_CARD))
3809 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3810 #endif
3811 #ifndef DC395x_NO_SYNC
3812 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3813 if (!(lun) || current_sync_offset)
3814 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3815 #endif
3816 if (dcb->target_lun != 0) {
3817 /* Copy settings */
3818 struct DeviceCtlBlk *p;
3819 list_for_each_entry(p, &acb->dcb_list, list)
3820 if (p->target_id == dcb->target_id)
3821 break;
3822 dprintkdbg(DBG_1,
3823 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3824 dcb->target_id, dcb->target_lun,
3825 p->target_id, p->target_lun);
3826 dcb->sync_mode = p->sync_mode;
3827 dcb->sync_period = p->sync_period;
3828 dcb->min_nego_period = p->min_nego_period;
3829 dcb->sync_offset = p->sync_offset;
3830 dcb->inquiry7 = p->inquiry7;
3831 }
3832 return dcb;
3833 }
3834
3835
3836 /**
3837 * adapter_add_device - Adds the device instance to the adaptor instance.
3838 *
3839 * @acb: The adapter device to be updated
3840 * @dcb: A newly created and intialised device instance to add.
3841 **/
3842 static void adapter_add_device(struct AdapterCtlBlk *acb,
3843 struct DeviceCtlBlk *dcb)
3844 {
3845 /* backpointer to adapter */
3846 dcb->acb = acb;
3847
3848 /* set run_robin to this device if it is currently empty */
3849 if (list_empty(&acb->dcb_list))
3850 acb->dcb_run_robin = dcb;
3851
3852 /* add device to list */
3853 list_add_tail(&dcb->list, &acb->dcb_list);
3854
3855 /* update device maps */
3856 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3857 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3858 }
3859
3860
3861 /**
3862 * adapter_remove_device - Removes the device instance from the adaptor
3863 * instance. The device instance is not check in any way or freed by this.
3864 * The caller is expected to take care of that. This will simply remove the
3865 * device from the adapters data strcutures.
3866 *
3867 * @acb: The adapter device to be updated
3868 * @dcb: A device that has previously been added to the adapter.
3869 **/
3870 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3871 struct DeviceCtlBlk *dcb)
3872 {
3873 struct DeviceCtlBlk *i;
3874 struct DeviceCtlBlk *tmp;
3875 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3876 dcb->target_id, dcb->target_lun);
3877
3878 /* fix up any pointers to this device that we have in the adapter */
3879 if (acb->active_dcb == dcb)
3880 acb->active_dcb = NULL;
3881 if (acb->dcb_run_robin == dcb)
3882 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3883
3884 /* unlink from list */
3885 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3886 if (dcb == i) {
3887 list_del(&i->list);
3888 break;
3889 }
3890
3891 /* clear map and children */
3892 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3893 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3894 dcb->acb = NULL;
3895 }
3896
3897
3898 /**
3899 * adapter_remove_and_free_device - Removes a single device from the adapter
3900 * and then frees the device information.
3901 *
3902 * @acb: The adapter device to be updated
3903 * @dcb: A device that has previously been added to the adapter.
3904 */
3905 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3906 struct DeviceCtlBlk *dcb)
3907 {
3908 if (list_size(&dcb->srb_going_list) > 1) {
3909 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3910 "Won't remove because of %i active requests.\n",
3911 dcb->target_id, dcb->target_lun,
3912 list_size(&dcb->srb_going_list));
3913 return;
3914 }
3915 adapter_remove_device(acb, dcb);
3916 kfree(dcb);
3917 }
3918
3919
3920 /**
3921 * adapter_remove_and_free_all_devices - Removes and frees all of the
3922 * devices associated with the specified adapter.
3923 *
3924 * @acb: The adapter from which all devices should be removed.
3925 **/
3926 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3927 {
3928 struct DeviceCtlBlk *dcb;
3929 struct DeviceCtlBlk *tmp;
3930 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3931 list_size(&acb->dcb_list));
3932
3933 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3934 adapter_remove_and_free_device(acb, dcb);
3935 }
3936
3937
3938 /**
3939 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3940 * scsi device that we need to deal with. We allocate a new device and then
3941 * insert that device into the adapters device list.
3942 *
3943 * @scsi_device: The new scsi device that we need to handle.
3944 **/
3945 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3946 {
3947 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3948 struct DeviceCtlBlk *dcb;
3949
3950 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3951 if (!dcb)
3952 return -ENOMEM;
3953 adapter_add_device(acb, dcb);
3954
3955 return 0;
3956 }
3957
3958
3959 /**
3960 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3961 * device that is going away.
3962 *
3963 * @scsi_device: The new scsi device that we need to handle.
3964 **/
3965 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3966 {
3967 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3968 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3969 if (dcb)
3970 adapter_remove_and_free_device(acb, dcb);
3971 }
3972
3973
3974
3975
3976 /**
3977 * trms1040_wait_30us: wait for 30 us
3978 *
3979 * Waits for 30us (using the chip by the looks of it..)
3980 *
3981 * @io_port: base I/O address
3982 **/
3983 static void __devinit trms1040_wait_30us(unsigned long io_port)
3984 {
3985 /* ScsiPortStallExecution(30); wait 30 us */
3986 outb(5, io_port + TRM_S1040_GEN_TIMER);
3987 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3988 /* nothing */ ;
3989 }
3990
3991
3992 /**
3993 * trms1040_write_cmd - write the secified command and address to
3994 * chip
3995 *
3996 * @io_port: base I/O address
3997 * @cmd: SB + op code (command) to send
3998 * @addr: address to send
3999 **/
4000 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
4001 {
4002 int i;
4003 u8 send_data;
4004
4005 /* program SB + OP code */
4006 for (i = 0; i < 3; i++, cmd <<= 1) {
4007 send_data = NVR_SELECT;
4008 if (cmd & 0x04) /* Start from bit 2 */
4009 send_data |= NVR_BITOUT;
4010
4011 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4012 trms1040_wait_30us(io_port);
4013 outb((send_data | NVR_CLOCK),
4014 io_port + TRM_S1040_GEN_NVRAM);
4015 trms1040_wait_30us(io_port);
4016 }
4017
4018 /* send address */
4019 for (i = 0; i < 7; i++, addr <<= 1) {
4020 send_data = NVR_SELECT;
4021 if (addr & 0x40) /* Start from bit 6 */
4022 send_data |= NVR_BITOUT;
4023
4024 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4025 trms1040_wait_30us(io_port);
4026 outb((send_data | NVR_CLOCK),
4027 io_port + TRM_S1040_GEN_NVRAM);
4028 trms1040_wait_30us(io_port);
4029 }
4030 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4031 trms1040_wait_30us(io_port);
4032 }
4033
4034
4035 /**
4036 * trms1040_set_data - store a single byte in the eeprom
4037 *
4038 * Called from write all to write a single byte into the SSEEPROM
4039 * Which is done one bit at a time.
4040 *
4041 * @io_port: base I/O address
4042 * @addr: offset into EEPROM
4043 * @byte: bytes to write
4044 **/
4045 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4046 {
4047 int i;
4048 u8 send_data;
4049
4050 /* Send write command & address */
4051 trms1040_write_cmd(io_port, 0x05, addr);
4052
4053 /* Write data */
4054 for (i = 0; i < 8; i++, byte <<= 1) {
4055 send_data = NVR_SELECT;
4056 if (byte & 0x80) /* Start from bit 7 */
4057 send_data |= NVR_BITOUT;
4058
4059 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4060 trms1040_wait_30us(io_port);
4061 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4062 trms1040_wait_30us(io_port);
4063 }
4064 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4065 trms1040_wait_30us(io_port);
4066
4067 /* Disable chip select */
4068 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4069 trms1040_wait_30us(io_port);
4070
4071 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4072 trms1040_wait_30us(io_port);
4073
4074 /* Wait for write ready */
4075 while (1) {
4076 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4077 trms1040_wait_30us(io_port);
4078
4079 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4080 trms1040_wait_30us(io_port);
4081
4082 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4083 break;
4084 }
4085
4086 /* Disable chip select */
4087 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4088 }
4089
4090
4091 /**
4092 * trms1040_write_all - write 128 bytes to the eeprom
4093 *
4094 * Write the supplied 128 bytes to the chips SEEPROM
4095 *
4096 * @eeprom: the data to write
4097 * @io_port: the base io port
4098 **/
4099 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4100 {
4101 u8 *b_eeprom = (u8 *)eeprom;
4102 u8 addr;
4103
4104 /* Enable SEEPROM */
4105 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4106 io_port + TRM_S1040_GEN_CONTROL);
4107
4108 /* write enable */
4109 trms1040_write_cmd(io_port, 0x04, 0xFF);
4110 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4111 trms1040_wait_30us(io_port);
4112
4113 /* write */
4114 for (addr = 0; addr < 128; addr++, b_eeprom++)
4115 trms1040_set_data(io_port, addr, *b_eeprom);
4116
4117 /* write disable */
4118 trms1040_write_cmd(io_port, 0x04, 0x00);
4119 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4120 trms1040_wait_30us(io_port);
4121
4122 /* Disable SEEPROM */
4123 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4124 io_port + TRM_S1040_GEN_CONTROL);
4125 }
4126
4127
4128 /**
4129 * trms1040_get_data - get a single byte from the eeprom
4130 *
4131 * Called from read all to read a single byte into the SSEEPROM
4132 * Which is done one bit at a time.
4133 *
4134 * @io_port: base I/O address
4135 * @addr: offset into SEEPROM
4136 *
4137 * Returns the byte read.
4138 **/
4139 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4140 {
4141 int i;
4142 u8 read_byte;
4143 u8 result = 0;
4144
4145 /* Send read command & address */
4146 trms1040_write_cmd(io_port, 0x06, addr);
4147
4148 /* read data */
4149 for (i = 0; i < 8; i++) {
4150 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4151 trms1040_wait_30us(io_port);
4152 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4153
4154 /* Get data bit while falling edge */
4155 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4156 result <<= 1;
4157 if (read_byte & NVR_BITIN)
4158 result |= 1;
4159
4160 trms1040_wait_30us(io_port);
4161 }
4162
4163 /* Disable chip select */
4164 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4165 return result;
4166 }
4167
4168
4169 /**
4170 * trms1040_read_all - read all bytes from the eeprom
4171 *
4172 * Read the 128 bytes from the SEEPROM.
4173 *
4174 * @eeprom: where to store the data
4175 * @io_port: the base io port
4176 **/
4177 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4178 {
4179 u8 *b_eeprom = (u8 *)eeprom;
4180 u8 addr;
4181
4182 /* Enable SEEPROM */
4183 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4184 io_port + TRM_S1040_GEN_CONTROL);
4185
4186 /* read details */
4187 for (addr = 0; addr < 128; addr++, b_eeprom++)
4188 *b_eeprom = trms1040_get_data(io_port, addr);
4189
4190 /* Disable SEEPROM */
4191 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4192 io_port + TRM_S1040_GEN_CONTROL);
4193 }
4194
4195
4196
4197 /**
4198 * check_eeprom - get and check contents of the eeprom
4199 *
4200 * Read seeprom 128 bytes into the memory provider in eeprom.
4201 * Checks the checksum and if it's not correct it uses a set of default
4202 * values.
4203 *
4204 * @eeprom: caller allocated strcuture to read the eeprom data into
4205 * @io_port: io port to read from
4206 **/
4207 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4208 {
4209 u16 *w_eeprom = (u16 *)eeprom;
4210 u16 w_addr;
4211 u16 cksum;
4212 u32 d_addr;
4213 u32 *d_eeprom;
4214
4215 trms1040_read_all(eeprom, io_port); /* read eeprom */
4216
4217 cksum = 0;
4218 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4219 w_addr++, w_eeprom++)
4220 cksum += *w_eeprom;
4221 if (cksum != 0x1234) {
4222 /*
4223 * Checksum is wrong.
4224 * Load a set of defaults into the eeprom buffer
4225 */
4226 dprintkl(KERN_WARNING,
4227 "EEProm checksum error: using default values and options.\n");
4228 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4229 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4230 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4231 eeprom->sub_sys_id[1] =
4232 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4233 eeprom->sub_class = 0x00;
4234 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4235 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4236 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4237 eeprom->device_id[1] =
4238 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4239 eeprom->reserved = 0x00;
4240
4241 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4242 d_addr < 16; d_addr++, d_eeprom++)
4243 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4244
4245 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4246 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4247 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4248 *d_eeprom = 0x00;
4249
4250 /* Now load defaults (maybe set by boot/module params) */
4251 set_safe_settings();
4252 fix_settings();
4253 eeprom_override(eeprom);
4254
4255 eeprom->cksum = 0x00;
4256 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4257 w_addr < 63; w_addr++, w_eeprom++)
4258 cksum += *w_eeprom;
4259
4260 *w_eeprom = 0x1234 - cksum;
4261 trms1040_write_all(eeprom, io_port);
4262 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4263 } else {
4264 set_safe_settings();
4265 eeprom_index_to_delay(eeprom);
4266 eeprom_override(eeprom);
4267 }
4268 }
4269
4270
4271 /**
4272 * print_eeprom_settings - output the eeprom settings
4273 * to the kernel log so people can see what they were.
4274 *
4275 * @eeprom: The eeprom data strucutre to show details for.
4276 **/
4277 static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4278 {
4279 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4280 eeprom->scsi_id,
4281 eeprom->target[0].period,
4282 clock_speed[eeprom->target[0].period] / 10,
4283 clock_speed[eeprom->target[0].period] % 10,
4284 eeprom->target[0].cfg0);
4285 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4286 eeprom->channel_cfg, eeprom->max_tag,
4287 1 << eeprom->max_tag, eeprom->delay_time);
4288 }
4289
4290
4291 /* Free SG tables */
4292 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4293 {
4294 int i;
4295 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4296
4297 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4298 kfree(acb->srb_array[i].segment_x);
4299 }
4300
4301
4302 /*
4303 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4304 * should never cross a page boundary */
4305 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4306 {
4307 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4308 *SEGMENTX_LEN;
4309 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4310 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4311 int srb_idx = 0;
4312 unsigned i = 0;
4313 struct SGentry *ptr;
4314
4315 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4316 acb->srb_array[i].segment_x = NULL;
4317
4318 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4319 while (pages--) {
4320 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4321 if (!ptr) {
4322 adapter_sg_tables_free(acb);
4323 return 1;
4324 }
4325 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4326 PAGE_SIZE, ptr, srb_idx);
4327 i = 0;
4328 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4329 acb->srb_array[srb_idx++].segment_x =
4330 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4331 }
4332 if (i < srbs_per_page)
4333 acb->srb.segment_x =
4334 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4335 else
4336 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4337 return 0;
4338 }
4339
4340
4341
4342 /**
4343 * adapter_print_config - print adapter connection and termination
4344 * config
4345 *
4346 * The io port in the adapter needs to have been set before calling
4347 * this function.
4348 *
4349 * @acb: The adapter to print the information for.
4350 **/
4351 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4352 {
4353 u8 bval;
4354
4355 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4356 dprintkl(KERN_INFO, "%sConnectors: ",
4357 ((bval & WIDESCSI) ? "(Wide) " : ""));
4358 if (!(bval & CON5068))
4359 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4360 if (!(bval & CON68))
4361 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4362 if (!(bval & CON50))
4363 printk("int50 ");
4364 if ((bval & (CON5068 | CON50 | CON68)) ==
4365 0 /*(CON5068 | CON50 | CON68) */ )
4366 printk(" Oops! (All 3?) ");
4367 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4368 printk(" Termination: ");
4369 if (bval & DIS_TERM)
4370 printk("Disabled\n");
4371 else {
4372 if (bval & AUTOTERM)
4373 printk("Auto ");
4374 if (bval & LOW8TERM)
4375 printk("Low ");
4376 if (bval & UP8TERM)
4377 printk("High ");
4378 printk("\n");
4379 }
4380 }
4381
4382
4383 /**
4384 * adapter_init_params - Initialize the various parameters in the
4385 * adapter structure. Note that the pointer to the scsi_host is set
4386 * early (when this instance is created) and the io_port and irq
4387 * values are set later after they have been reserved. This just gets
4388 * everything set to a good starting position.
4389 *
4390 * The eeprom structure in the adapter needs to have been set before
4391 * calling this function.
4392 *
4393 * @acb: The adapter to initialize.
4394 **/
4395 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4396 {
4397 struct NvRamType *eeprom = &acb->eeprom;
4398 int i;
4399
4400 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4401 /* NOTE: acb->io_port_base is set at port registration time */
4402 /* NOTE: acb->io_port_len is set at port registration time */
4403
4404 INIT_LIST_HEAD(&acb->dcb_list);
4405 acb->dcb_run_robin = NULL;
4406 acb->active_dcb = NULL;
4407
4408 INIT_LIST_HEAD(&acb->srb_free_list);
4409 /* temp SRB for Q tag used or abort command used */
4410 acb->tmp_srb = &acb->srb;
4411 init_timer(&acb->waiting_timer);
4412 init_timer(&acb->selto_timer);
4413
4414 acb->srb_count = DC395x_MAX_SRB_CNT;
4415
4416 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4417 /* NOTE: acb->irq_level is set at IRQ registration time */
4418
4419 acb->tag_max_num = 1 << eeprom->max_tag;
4420 if (acb->tag_max_num > 30)
4421 acb->tag_max_num = 30;
4422
4423 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4424 acb->gmode2 = eeprom->channel_cfg;
4425 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4426
4427 if (eeprom->channel_cfg & NAC_SCANLUN)
4428 acb->lun_chk = 1;
4429 acb->scan_devices = 1;
4430
4431 acb->scsi_host->this_id = eeprom->scsi_id;
4432 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4433
4434 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4435 acb->dcb_map[i] = 0;
4436
4437 acb->msg_len = 0;
4438
4439 /* link static array of srbs into the srb free list */
4440 for (i = 0; i < acb->srb_count - 1; i++)
4441 srb_free_insert(acb, &acb->srb_array[i]);
4442 }
4443
4444
4445 /**
4446 * adapter_init_host - Initialize the scsi host instance based on
4447 * values that we have already stored in the adapter instance. There's
4448 * some mention that a lot of these are deprecated, so we won't use
4449 * them (we'll use the ones in the adapter instance) but we'll fill
4450 * them in in case something else needs them.
4451 *
4452 * The eeprom structure, irq and io ports in the adapter need to have
4453 * been set before calling this function.
4454 *
4455 * @host: The scsi host instance to fill in the values for.
4456 **/
4457 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4458 {
4459 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4460 struct NvRamType *eeprom = &acb->eeprom;
4461
4462 host->max_cmd_len = 24;
4463 host->can_queue = DC395x_MAX_CMD_QUEUE;
4464 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4465 host->this_id = (int)eeprom->scsi_id;
4466 host->io_port = acb->io_port_base;
4467 host->n_io_port = acb->io_port_len;
4468 host->dma_channel = -1;
4469 host->unique_id = acb->io_port_base;
4470 host->irq = acb->irq_level;
4471 host->last_reset = jiffies;
4472
4473 host->max_id = 16;
4474 if (host->max_id - 1 == eeprom->scsi_id)
4475 host->max_id--;
4476
4477 #ifdef CONFIG_SCSI_MULTI_LUN
4478 if (eeprom->channel_cfg & NAC_SCANLUN)
4479 host->max_lun = 8;
4480 else
4481 host->max_lun = 1;
4482 #else
4483 host->max_lun = 1;
4484 #endif
4485
4486 }
4487
4488
4489 /**
4490 * adapter_init_chip - Get the chip into a know state and figure out
4491 * some of the settings that apply to this adapter.
4492 *
4493 * The io port in the adapter needs to have been set before calling
4494 * this function. The config will be configured correctly on return.
4495 *
4496 * @acb: The adapter which we are to init.
4497 **/
4498 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4499 {
4500 struct NvRamType *eeprom = &acb->eeprom;
4501
4502 /* Mask all the interrupt */
4503 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4504 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4505
4506 /* Reset SCSI module */
4507 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4508
4509 /* Reset PCI/DMA module */
4510 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4511 udelay(20);
4512
4513 /* program configuration 0 */
4514 acb->config = HCC_AUTOTERM | HCC_PARITY;
4515 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4516 acb->config |= HCC_WIDE_CARD;
4517
4518 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4519 acb->config |= HCC_SCSI_RESET;
4520
4521 if (acb->config & HCC_SCSI_RESET) {
4522 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4523 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4524
4525 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4526 /*spin_unlock_irq (&io_request_lock); */
4527 udelay(500);
4528
4529 acb->scsi_host->last_reset =
4530 jiffies + HZ / 2 +
4531 HZ * acb->eeprom.delay_time;
4532
4533 /*spin_lock_irq (&io_request_lock); */
4534 }
4535 }
4536
4537
4538 /**
4539 * init_adapter - Grab the resource for the card, setup the adapter
4540 * information, set the card into a known state, create the various
4541 * tables etc etc. This basically gets all adapter information all up
4542 * to date, intialised and gets the chip in sync with it.
4543 *
4544 * @host: This hosts adapter structure
4545 * @io_port: The base I/O port
4546 * @irq: IRQ
4547 *
4548 * Returns 0 if the initialization succeeds, any other value on
4549 * failure.
4550 **/
4551 static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4552 unsigned long io_port, u32 io_port_len, unsigned int irq)
4553 {
4554 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4555 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4556 goto failed;
4557 }
4558 /* store port base to indicate we have registered it */
4559 acb->io_port_base = io_port;
4560 acb->io_port_len = io_port_len;
4561
4562 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4563 /* release the region we just claimed */
4564 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4565 goto failed;
4566 }
4567 /* store irq to indicate we have registered it */
4568 acb->irq_level = irq;
4569
4570 /* get eeprom configuration information and command line settings etc */
4571 check_eeprom(&acb->eeprom, io_port);
4572 print_eeprom_settings(&acb->eeprom);
4573
4574 /* setup adapter control block */
4575 adapter_init_params(acb);
4576
4577 /* display card connectors/termination settings */
4578 adapter_print_config(acb);
4579
4580 if (adapter_sg_tables_alloc(acb)) {
4581 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4582 goto failed;
4583 }
4584 adapter_init_scsi_host(acb->scsi_host);
4585 adapter_init_chip(acb);
4586 set_basic_config(acb);
4587
4588 dprintkdbg(DBG_0,
4589 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4590 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4591 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4592 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4593 return 0;
4594
4595 failed:
4596 if (acb->irq_level)
4597 free_irq(acb->irq_level, acb);
4598 if (acb->io_port_base)
4599 release_region(acb->io_port_base, acb->io_port_len);
4600 adapter_sg_tables_free(acb);
4601
4602 return 1;
4603 }
4604
4605
4606 /**
4607 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4608 * stopping all operations and disabling interrupt generation on the
4609 * card.
4610 *
4611 * @acb: The adapter which we are to shutdown.
4612 **/
4613 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4614 {
4615 /* disable interrupts */
4616 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4617 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4618
4619 /* reset the scsi bus */
4620 if (acb->config & HCC_SCSI_RESET)
4621 reset_scsi_bus(acb);
4622
4623 /* clear any pending interupt state */
4624 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4625 }
4626
4627
4628
4629 /**
4630 * adapter_uninit - Shut down the chip and release any resources that
4631 * we had allocated. Once this returns the adapter should not be used
4632 * anymore.
4633 *
4634 * @acb: The adapter which we are to un-initialize.
4635 **/
4636 static void adapter_uninit(struct AdapterCtlBlk *acb)
4637 {
4638 unsigned long flags;
4639 DC395x_LOCK_IO(acb->scsi_host, flags);
4640
4641 /* remove timers */
4642 if (timer_pending(&acb->waiting_timer))
4643 del_timer(&acb->waiting_timer);
4644 if (timer_pending(&acb->selto_timer))
4645 del_timer(&acb->selto_timer);
4646
4647 adapter_uninit_chip(acb);
4648 adapter_remove_and_free_all_devices(acb);
4649 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4650
4651 if (acb->irq_level)
4652 free_irq(acb->irq_level, acb);
4653 if (acb->io_port_base)
4654 release_region(acb->io_port_base, acb->io_port_len);
4655
4656 adapter_sg_tables_free(acb);
4657 }
4658
4659
4660 #undef SPRINTF
4661 #define SPRINTF(args...) pos += sprintf(pos, args)
4662
4663 #undef YESNO
4664 #define YESNO(YN) \
4665 if (YN) SPRINTF(" Yes ");\
4666 else SPRINTF(" No ")
4667
4668 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4669 char **start, off_t offset, int length, int inout)
4670 {
4671 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4672 int spd, spd1;
4673 char *pos = buffer;
4674 struct DeviceCtlBlk *dcb;
4675 unsigned long flags;
4676 int dev;
4677
4678 if (inout) /* Has data been written to the file ? */
4679 return -EPERM;
4680
4681 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4682 SPRINTF(" Driver Version " DC395X_VERSION "\n");
4683
4684 DC395x_LOCK_IO(acb->scsi_host, flags);
4685
4686 SPRINTF("SCSI Host Nr %i, ", host->host_no);
4687 SPRINTF("DC395U/UW/F DC315/U %s\n",
4688 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4689 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4690 SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4691 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4692
4693 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4694 SPRINTF("AdapterID %i\n", host->this_id);
4695
4696 SPRINTF("tag_max_num %i", acb->tag_max_num);
4697 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4698 SPRINTF(", FilterCfg 0x%02x",
4699 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4700 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4701 /*SPRINTF("\n"); */
4702
4703 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4704 SPRINTF
4705 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4706 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4707 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4708 acb->dcb_map[6], acb->dcb_map[7]);
4709 SPRINTF
4710 (" %02x %02x %02x %02x %02x %02x %02x %02x\n",
4711 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4712 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4713 acb->dcb_map[14], acb->dcb_map[15]);
4714
4715 SPRINTF
4716 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4717
4718 dev = 0;
4719 list_for_each_entry(dcb, &acb->dcb_list, list) {
4720 int nego_period;
4721 SPRINTF("%02i %02i %02i ", dev, dcb->target_id,
4722 dcb->target_lun);
4723 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4724 YESNO(dcb->sync_offset);
4725 YESNO(dcb->sync_period & WIDE_SYNC);
4726 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4727 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4728 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4729 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4730 if (dcb->sync_offset)
4731 SPRINTF(" %03i ns ", nego_period);
4732 else
4733 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4734
4735 if (dcb->sync_offset & 0x0f) {
4736 spd = 1000 / (nego_period);
4737 spd1 = 1000 % (nego_period);
4738 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4739 SPRINTF(" %2i.%1i M %02i ", spd, spd1,
4740 (dcb->sync_offset & 0x0f));
4741 } else
4742 SPRINTF(" ");
4743
4744 /* Add more info ... */
4745 SPRINTF(" %02i\n", dcb->max_command);
4746 dev++;
4747 }
4748
4749 if (timer_pending(&acb->waiting_timer))
4750 SPRINTF("Waiting queue timer running\n");
4751 else
4752 SPRINTF("\n");
4753
4754 list_for_each_entry(dcb, &acb->dcb_list, list) {
4755 struct ScsiReqBlk *srb;
4756 if (!list_empty(&dcb->srb_waiting_list))
4757 SPRINTF("DCB (%02i-%i): Waiting: %i:",
4758 dcb->target_id, dcb->target_lun,
4759 list_size(&dcb->srb_waiting_list));
4760 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4761 SPRINTF(" %li", srb->cmd->pid);
4762 if (!list_empty(&dcb->srb_going_list))
4763 SPRINTF("\nDCB (%02i-%i): Going : %i:",
4764 dcb->target_id, dcb->target_lun,
4765 list_size(&dcb->srb_going_list));
4766 list_for_each_entry(srb, &dcb->srb_going_list, list)
4767 SPRINTF(" %li", srb->cmd->pid);
4768 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4769 SPRINTF("\n");
4770 }
4771
4772 if (debug_enabled(DBG_1)) {
4773 SPRINTF("DCB list for ACB %p:\n", acb);
4774 list_for_each_entry(dcb, &acb->dcb_list, list) {
4775 SPRINTF("%p -> ", dcb);
4776 }
4777 SPRINTF("END\n");
4778 }
4779
4780 *start = buffer + offset;
4781 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4782
4783 if (pos - buffer < offset)
4784 return 0;
4785 else if (pos - buffer - offset < length)
4786 return pos - buffer - offset;
4787 else
4788 return length;
4789 }
4790
4791
4792 static struct scsi_host_template dc395x_driver_template = {
4793 .module = THIS_MODULE,
4794 .proc_name = DC395X_NAME,
4795 .proc_info = dc395x_proc_info,
4796 .name = DC395X_BANNER " " DC395X_VERSION,
4797 .queuecommand = dc395x_queue_command,
4798 .bios_param = dc395x_bios_param,
4799 .slave_alloc = dc395x_slave_alloc,
4800 .slave_destroy = dc395x_slave_destroy,
4801 .can_queue = DC395x_MAX_CAN_QUEUE,
4802 .this_id = 7,
4803 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4804 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4805 .eh_abort_handler = dc395x_eh_abort,
4806 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4807 .unchecked_isa_dma = 0,
4808 .use_clustering = DISABLE_CLUSTERING,
4809 };
4810
4811
4812 /**
4813 * banner_display - Display banner on first instance of driver
4814 * initialized.
4815 **/
4816 static void banner_display(void)
4817 {
4818 static int banner_done = 0;
4819 if (!banner_done)
4820 {
4821 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4822 banner_done = 1;
4823 }
4824 }
4825
4826
4827 /**
4828 * dc395x_init_one - Initialise a single instance of the adapter.
4829 *
4830 * The PCI layer will call this once for each instance of the adapter
4831 * that it finds in the system. The pci_dev strcuture indicates which
4832 * instance we are being called from.
4833 *
4834 * @dev: The PCI device to intialize.
4835 * @id: Looks like a pointer to the entry in our pci device table
4836 * that was actually matched by the PCI subsystem.
4837 *
4838 * Returns 0 on success, or an error code (-ve) on failure.
4839 **/
4840 static int __devinit dc395x_init_one(struct pci_dev *dev,
4841 const struct pci_device_id *id)
4842 {
4843 struct Scsi_Host *scsi_host = NULL;
4844 struct AdapterCtlBlk *acb = NULL;
4845 unsigned long io_port_base;
4846 unsigned int io_port_len;
4847 unsigned int irq;
4848
4849 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4850 banner_display();
4851
4852 if (pci_enable_device(dev))
4853 {
4854 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4855 return -ENODEV;
4856 }
4857 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4858 io_port_len = pci_resource_len(dev, 0);
4859 irq = dev->irq;
4860 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4861
4862 /* allocate scsi host information (includes out adapter) */
4863 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4864 sizeof(struct AdapterCtlBlk));
4865 if (!scsi_host) {
4866 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4867 goto fail;
4868 }
4869 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4870 acb->scsi_host = scsi_host;
4871 acb->dev = dev;
4872
4873 /* initialise the adapter and everything we need */
4874 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4875 dprintkl(KERN_INFO, "adapter init failed\n");
4876 goto fail;
4877 }
4878
4879 pci_set_master(dev);
4880
4881 /* get the scsi mid level to scan for new devices on the bus */
4882 if (scsi_add_host(scsi_host, &dev->dev)) {
4883 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4884 goto fail;
4885 }
4886 pci_set_drvdata(dev, scsi_host);
4887 scsi_scan_host(scsi_host);
4888
4889 return 0;
4890
4891 fail:
4892 if (acb != NULL)
4893 adapter_uninit(acb);
4894 if (scsi_host != NULL)
4895 scsi_host_put(scsi_host);
4896 pci_disable_device(dev);
4897 return -ENODEV;
4898 }
4899
4900
4901 /**
4902 * dc395x_remove_one - Called to remove a single instance of the
4903 * adapter.
4904 *
4905 * @dev: The PCI device to intialize.
4906 **/
4907 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4908 {
4909 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4910 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4911
4912 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4913
4914 scsi_remove_host(scsi_host);
4915 adapter_uninit(acb);
4916 pci_disable_device(dev);
4917 scsi_host_put(scsi_host);
4918 pci_set_drvdata(dev, NULL);
4919 }
4920
4921
4922 static struct pci_device_id dc395x_pci_table[] = {
4923 {
4924 .vendor = PCI_VENDOR_ID_TEKRAM,
4925 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4926 .subvendor = PCI_ANY_ID,
4927 .subdevice = PCI_ANY_ID,
4928 },
4929 {} /* Terminating entry */
4930 };
4931 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4932
4933
4934 static struct pci_driver dc395x_driver = {
4935 .name = DC395X_NAME,
4936 .id_table = dc395x_pci_table,
4937 .probe = dc395x_init_one,
4938 .remove = __devexit_p(dc395x_remove_one),
4939 };
4940
4941
4942 /**
4943 * dc395x_module_init - Module initialization function
4944 *
4945 * Used by both module and built-in driver to initialise this driver.
4946 **/
4947 static int __init dc395x_module_init(void)
4948 {
4949 return pci_register_driver(&dc395x_driver);
4950 }
4951
4952
4953 /**
4954 * dc395x_module_exit - Module cleanup function.
4955 **/
4956 static void __exit dc395x_module_exit(void)
4957 {
4958 pci_unregister_driver(&dc395x_driver);
4959 }
4960
4961
4962 module_init(dc395x_module_init);
4963 module_exit(dc395x_module_exit);
4964
4965 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4966 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4967 MODULE_LICENSE("GPL");
Tomato firmware and modifications.