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manual update from upstream:
[linux-2.6/libata-dev.git] / drivers / scsi / dc395x.c
blob600ba120286468e63f0df8240e08613dee24fdf5
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 u32 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 u32 total_xfer_length; /* Total number of bytes remaining to be transfered */
238 unsigned char *virt_addr; /* Virtual address of current transfer position */
239
240 /*
241 * The sense buffer handling function, request_sense, uses
242 * the first hw sg entry (segment_x[0]) and the transfer
243 * length (total_xfer_length). While doing this it stores the
244 * original values into the last sg hw list
245 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
246 * total_xfer_length in xferred. These values are restored in
247 * pci_unmap_srb_sense. This is the only place xferred is used.
248 */
249 u32 xferred; /* Saved copy of total_xfer_length */
250
251 u16 state;
252
253 u8 msgin_buf[6];
254 u8 msgout_buf[6];
255
256 u8 adapter_status;
257 u8 target_status;
258 u8 msg_count;
259 u8 end_message;
260
261 u8 tag_number;
262 u8 status;
263 u8 retry_count;
264 u8 flag;
265
266 u8 scsi_phase;
267 };
268
269 struct DeviceCtlBlk {
270 struct list_head list; /* next/prev ptrs for the dcb list */
271 struct AdapterCtlBlk *acb;
272 struct list_head srb_going_list; /* head of going srb list */
273 struct list_head srb_waiting_list; /* head of waiting srb list */
274
275 struct ScsiReqBlk *active_srb;
276 u32 tag_mask;
277
278 u16 max_command;
279
280 u8 target_id; /* SCSI Target ID (SCSI Only) */
281 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */
282 u8 identify_msg;
283 u8 dev_mode;
284
285 u8 inquiry7; /* To store Inquiry flags */
286 u8 sync_mode; /* 0:async mode */
287 u8 min_nego_period; /* for nego. */
288 u8 sync_period; /* for reg. */
289
290 u8 sync_offset; /* for reg. and nego.(low nibble) */
291 u8 flag;
292 u8 dev_type;
293 u8 init_tcq_flag;
294 };
295
296 struct AdapterCtlBlk {
297 struct Scsi_Host *scsi_host;
298
299 unsigned long io_port_base;
300 unsigned long io_port_len;
301
302 struct list_head dcb_list; /* head of going dcb list */
303 struct DeviceCtlBlk *dcb_run_robin;
304 struct DeviceCtlBlk *active_dcb;
305
306 struct list_head srb_free_list; /* head of free srb list */
307 struct ScsiReqBlk *tmp_srb;
308 struct timer_list waiting_timer;
309 struct timer_list selto_timer;
310
311 u16 srb_count;
312
313 u8 sel_timeout;
314
315 unsigned int irq_level;
316 u8 tag_max_num;
317 u8 acb_flag;
318 u8 gmode2;
319
320 u8 config;
321 u8 lun_chk;
322 u8 scan_devices;
323 u8 hostid_bit;
324
325 u8 dcb_map[DC395x_MAX_SCSI_ID];
326 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
327
328 struct pci_dev *dev;
329
330 u8 msg_len;
331
332 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
333 struct ScsiReqBlk srb;
334
335 struct NvRamType eeprom; /* eeprom settings for this adapter */
336 };
337
338
339 /*---------------------------------------------------------------------------
340 Forward declarations
341 ---------------------------------------------------------------------------*/
342 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
343 u16 *pscsi_status);
344 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
345 u16 *pscsi_status);
346 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
347 u16 *pscsi_status);
348 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
349 u16 *pscsi_status);
350 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
351 u16 *pscsi_status);
352 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
353 u16 *pscsi_status);
354 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
355 u16 *pscsi_status);
356 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
357 u16 *pscsi_status);
358 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
359 u16 *pscsi_status);
360 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
361 u16 *pscsi_status);
362 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
363 u16 *pscsi_status);
364 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
365 u16 *pscsi_status);
366 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
367 u16 *pscsi_status);
368 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
369 u16 *pscsi_status);
370 static void set_basic_config(struct AdapterCtlBlk *acb);
371 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
372 struct ScsiReqBlk *srb);
373 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
374 static void data_io_transfer(struct AdapterCtlBlk *acb,
375 struct ScsiReqBlk *srb, u16 io_dir);
376 static void disconnect(struct AdapterCtlBlk *acb);
377 static void reselect(struct AdapterCtlBlk *acb);
378 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
379 struct ScsiReqBlk *srb);
380 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
381 struct ScsiReqBlk *srb);
382 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
383 struct ScsiReqBlk *srb);
384 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
385 struct scsi_cmnd *cmd, u8 force);
386 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
387 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
388 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
389 struct ScsiReqBlk *srb);
390 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
391 struct ScsiReqBlk *srb);
392 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
393 struct ScsiReqBlk *srb);
394 static void set_xfer_rate(struct AdapterCtlBlk *acb,
395 struct DeviceCtlBlk *dcb);
396 static void waiting_timeout(unsigned long ptr);
397
398
399 /*---------------------------------------------------------------------------
400 Static Data
401 ---------------------------------------------------------------------------*/
402 static u16 current_sync_offset = 0;
403
404 static void *dc395x_scsi_phase0[] = {
405 data_out_phase0,/* phase:0 */
406 data_in_phase0, /* phase:1 */
407 command_phase0, /* phase:2 */
408 status_phase0, /* phase:3 */
409 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
410 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
411 msgout_phase0, /* phase:6 */
412 msgin_phase0, /* phase:7 */
413 };
414
415 static void *dc395x_scsi_phase1[] = {
416 data_out_phase1,/* phase:0 */
417 data_in_phase1, /* phase:1 */
418 command_phase1, /* phase:2 */
419 status_phase1, /* phase:3 */
420 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
421 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
422 msgout_phase1, /* phase:6 */
423 msgin_phase1, /* phase:7 */
424 };
425
426 /*
427 *Fast20: 000 50ns, 20.0 MHz
428 * 001 75ns, 13.3 MHz
429 * 010 100ns, 10.0 MHz
430 * 011 125ns, 8.0 MHz
431 * 100 150ns, 6.6 MHz
432 * 101 175ns, 5.7 MHz
433 * 110 200ns, 5.0 MHz
434 * 111 250ns, 4.0 MHz
435 *
436 *Fast40(LVDS): 000 25ns, 40.0 MHz
437 * 001 50ns, 20.0 MHz
438 * 010 75ns, 13.3 MHz
439 * 011 100ns, 10.0 MHz
440 * 100 125ns, 8.0 MHz
441 * 101 150ns, 6.6 MHz
442 * 110 175ns, 5.7 MHz
443 * 111 200ns, 5.0 MHz
444 */
445 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
446
447 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
448 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
449 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
450
451
452 /*---------------------------------------------------------------------------
453 Configuration
454 ---------------------------------------------------------------------------*/
455 /*
456 * Module/boot parameters currently effect *all* instances of the
457 * card in the system.
458 */
459
460 /*
461 * Command line parameters are stored in a structure below.
462 * These are the index's into the structure for the various
463 * command line options.
464 */
465 #define CFG_ADAPTER_ID 0
466 #define CFG_MAX_SPEED 1
467 #define CFG_DEV_MODE 2
468 #define CFG_ADAPTER_MODE 3
469 #define CFG_TAGS 4
470 #define CFG_RESET_DELAY 5
471
472 #define CFG_NUM 6 /* number of configuration items */
473
474
475 /*
476 * Value used to indicate that a command line override
477 * hasn't been used to modify the value.
478 */
479 #define CFG_PARAM_UNSET -1
480
481
482 /*
483 * Hold command line parameters.
484 */
485 struct ParameterData {
486 int value; /* value of this setting */
487 int min; /* minimum value */
488 int max; /* maximum value */
489 int def; /* default value */
490 int safe; /* safe value */
491 };
492 static struct ParameterData __devinitdata cfg_data[] = {
493 { /* adapter id */
494 CFG_PARAM_UNSET,
495 0,
496 15,
497 7,
498 7
499 },
500 { /* max speed */
501 CFG_PARAM_UNSET,
502 0,
503 7,
504 1, /* 13.3Mhz */
505 4, /* 6.7Hmz */
506 },
507 { /* dev mode */
508 CFG_PARAM_UNSET,
509 0,
510 0x3f,
511 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
512 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
513 NTC_DO_SEND_START,
514 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
515 },
516 { /* adapter mode */
517 CFG_PARAM_UNSET,
518 0,
519 0x2f,
520 #ifdef CONFIG_SCSI_MULTI_LUN
521 NAC_SCANLUN |
522 #endif
523 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
524 /*| NAC_ACTIVE_NEG*/,
525 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
526 },
527 { /* tags */
528 CFG_PARAM_UNSET,
529 0,
530 5,
531 3, /* 16 tags (??) */
532 2,
533 },
534 { /* reset delay */
535 CFG_PARAM_UNSET,
536 0,
537 180,
538 1, /* 1 second */
539 10, /* 10 seconds */
540 }
541 };
542
543
544 /*
545 * Safe settings. If set to zero the the BIOS/default values with
546 * command line overrides will be used. If set to 1 then safe and
547 * slow settings will be used.
548 */
549 static int use_safe_settings = 0;
550 module_param_named(safe, use_safe_settings, bool, 0);
551 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
552
553
554 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
555 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
556
557 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
558 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
559
560 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
561 MODULE_PARM_DESC(dev_mode, "Device mode.");
562
563 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
564 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
565
566 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
567 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
568
569 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
570 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
571
572
573 /**
574 * set_safe_settings - if the use_safe_settings option is set then
575 * set all values to the safe and slow values.
576 **/
577 static void __devinit set_safe_settings(void)
578 {
579 if (use_safe_settings)
580 {
581 int i;
582
583 dprintkl(KERN_INFO, "Using safe settings.\n");
584 for (i = 0; i < CFG_NUM; i++)
585 {
586 cfg_data[i].value = cfg_data[i].safe;
587 }
588 }
589 }
590
591
592 /**
593 * fix_settings - reset any boot parameters which are out of range
594 * back to the default values.
595 **/
596 static void __devinit fix_settings(void)
597 {
598 int i;
599
600 dprintkdbg(DBG_1,
601 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
602 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
603 cfg_data[CFG_ADAPTER_ID].value,
604 cfg_data[CFG_MAX_SPEED].value,
605 cfg_data[CFG_DEV_MODE].value,
606 cfg_data[CFG_ADAPTER_MODE].value,
607 cfg_data[CFG_TAGS].value,
608 cfg_data[CFG_RESET_DELAY].value);
609 for (i = 0; i < CFG_NUM; i++)
610 {
611 if (cfg_data[i].value < cfg_data[i].min
612 || cfg_data[i].value > cfg_data[i].max)
613 cfg_data[i].value = cfg_data[i].def;
614 }
615 }
616
617
618
619 /*
620 * Mapping from the eeprom delay index value (index into this array)
621 * to the the number of actual seconds that the delay should be for.
622 */
623 static char __devinitdata eeprom_index_to_delay_map[] =
624 { 1, 3, 5, 10, 16, 30, 60, 120 };
625
626
627 /**
628 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
629 * into a number of seconds.
630 *
631 * @eeprom: The eeprom structure in which we find the delay index to map.
632 **/
633 static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
634 {
635 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
636 }
637
638
639 /**
640 * delay_to_eeprom_index - Take a delay in seconds and return the
641 * closest eeprom index which will delay for at least that amount of
642 * seconds.
643 *
644 * @delay: The delay, in seconds, to find the eeprom index for.
645 **/
646 static int __devinit delay_to_eeprom_index(int delay)
647 {
648 u8 idx = 0;
649 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
650 idx++;
651 return idx;
652 }
653
654
655 /**
656 * eeprom_override - Override the eeprom settings, in the provided
657 * eeprom structure, with values that have been set on the command
658 * line.
659 *
660 * @eeprom: The eeprom data to override with command line options.
661 **/
662 static void __devinit eeprom_override(struct NvRamType *eeprom)
663 {
664 u8 id;
665
666 /* Adapter Settings */
667 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
668 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
669
670 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
671 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
672
673 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
674 eeprom->delay_time = delay_to_eeprom_index(
675 cfg_data[CFG_RESET_DELAY].value);
676
677 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
678 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
679
680 /* Device Settings */
681 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
682 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
683 eeprom->target[id].cfg0 =
684 (u8)cfg_data[CFG_DEV_MODE].value;
685
686 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
687 eeprom->target[id].period =
688 (u8)cfg_data[CFG_MAX_SPEED].value;
689
690 }
691 }
692
693
694 /*---------------------------------------------------------------------------
695 ---------------------------------------------------------------------------*/
696
697 static unsigned int list_size(struct list_head *head)
698 {
699 unsigned int count = 0;
700 struct list_head *pos;
701 list_for_each(pos, head)
702 count++;
703 return count;
704 }
705
706
707 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
708 struct DeviceCtlBlk *pos)
709 {
710 int use_next = 0;
711 struct DeviceCtlBlk* next = NULL;
712 struct DeviceCtlBlk* i;
713
714 if (list_empty(head))
715 return NULL;
716
717 /* find supplied dcb and then select the next one */
718 list_for_each_entry(i, head, list)
719 if (use_next) {
720 next = i;
721 break;
722 } else if (i == pos) {
723 use_next = 1;
724 }
725 /* if no next one take the head one (ie, wraparound) */
726 if (!next)
727 list_for_each_entry(i, head, list) {
728 next = i;
729 break;
730 }
731
732 return next;
733 }
734
735
736 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
737 {
738 if (srb->tag_number < 255) {
739 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
740 srb->tag_number = 255;
741 }
742 }
743
744
745 /* Find cmd in SRB list */
746 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
747 struct list_head *head)
748 {
749 struct ScsiReqBlk *i;
750 list_for_each_entry(i, head, list)
751 if (i->cmd == cmd)
752 return i;
753 return NULL;
754 }
755
756
757 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
758 {
759 struct list_head *head = &acb->srb_free_list;
760 struct ScsiReqBlk *srb = NULL;
761
762 if (!list_empty(head)) {
763 srb = list_entry(head->next, struct ScsiReqBlk, list);
764 list_del(head->next);
765 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
766 }
767 return srb;
768 }
769
770
771 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
772 {
773 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
774 list_add_tail(&srb->list, &acb->srb_free_list);
775 }
776
777
778 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
779 struct ScsiReqBlk *srb)
780 {
781 dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
782 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
783 list_add(&srb->list, &dcb->srb_waiting_list);
784 }
785
786
787 static void srb_waiting_append(struct DeviceCtlBlk *dcb,
788 struct ScsiReqBlk *srb)
789 {
790 dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
791 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
792 list_add_tail(&srb->list, &dcb->srb_waiting_list);
793 }
794
795
796 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
797 {
798 dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
799 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
800 list_add_tail(&srb->list, &dcb->srb_going_list);
801 }
802
803
804 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
805 {
806 struct ScsiReqBlk *i;
807 struct ScsiReqBlk *tmp;
808 dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
809 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
810
811 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
812 if (i == srb) {
813 list_del(&srb->list);
814 break;
815 }
816 }
817
818
819 static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
820 struct ScsiReqBlk *srb)
821 {
822 struct ScsiReqBlk *i;
823 struct ScsiReqBlk *tmp;
824 dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
825 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
826
827 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
828 if (i == srb) {
829 list_del(&srb->list);
830 break;
831 }
832 }
833
834
835 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
836 struct ScsiReqBlk *srb)
837 {
838 dprintkdbg(DBG_0,
839 "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
840 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
841 list_move(&srb->list, &dcb->srb_waiting_list);
842 }
843
844
845 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
846 struct ScsiReqBlk *srb)
847 {
848 dprintkdbg(DBG_0,
849 "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
850 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
851 list_move(&srb->list, &dcb->srb_going_list);
852 }
853
854
855 /* Sets the timer to wake us up */
856 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
857 {
858 if (timer_pending(&acb->waiting_timer))
859 return;
860 init_timer(&acb->waiting_timer);
861 acb->waiting_timer.function = waiting_timeout;
862 acb->waiting_timer.data = (unsigned long) acb;
863 if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
864 acb->waiting_timer.expires =
865 acb->scsi_host->last_reset - HZ / 2 + 1;
866 else
867 acb->waiting_timer.expires = jiffies + to + 1;
868 add_timer(&acb->waiting_timer);
869 }
870
871
872 /* Send the next command from the waiting list to the bus */
873 static void waiting_process_next(struct AdapterCtlBlk *acb)
874 {
875 struct DeviceCtlBlk *start = NULL;
876 struct DeviceCtlBlk *pos;
877 struct DeviceCtlBlk *dcb;
878 struct ScsiReqBlk *srb;
879 struct list_head *dcb_list_head = &acb->dcb_list;
880
881 if (acb->active_dcb
882 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
883 return;
884
885 if (timer_pending(&acb->waiting_timer))
886 del_timer(&acb->waiting_timer);
887
888 if (list_empty(dcb_list_head))
889 return;
890
891 /*
892 * Find the starting dcb. Need to find it again in the list
893 * since the list may have changed since we set the ptr to it
894 */
895 list_for_each_entry(dcb, dcb_list_head, list)
896 if (dcb == acb->dcb_run_robin) {
897 start = dcb;
898 break;
899 }
900 if (!start) {
901 /* This can happen! */
902 start = list_entry(dcb_list_head->next, typeof(*start), list);
903 acb->dcb_run_robin = start;
904 }
905
906
907 /*
908 * Loop over the dcb, but we start somewhere (potentially) in
909 * the middle of the loop so we need to manully do this.
910 */
911 pos = start;
912 do {
913 struct list_head *waiting_list_head = &pos->srb_waiting_list;
914
915 /* Make sure, the next another device gets scheduled ... */
916 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
917 acb->dcb_run_robin);
918
919 if (list_empty(waiting_list_head) ||
920 pos->max_command <= list_size(&pos->srb_going_list)) {
921 /* move to next dcb */
922 pos = dcb_get_next(dcb_list_head, pos);
923 } else {
924 srb = list_entry(waiting_list_head->next,
925 struct ScsiReqBlk, list);
926
927 /* Try to send to the bus */
928 if (!start_scsi(acb, pos, srb))
929 srb_waiting_to_going_move(pos, srb);
930 else
931 waiting_set_timer(acb, HZ/50);
932 break;
933 }
934 } while (pos != start);
935 }
936
937
938 /* Wake up waiting queue */
939 static void waiting_timeout(unsigned long ptr)
940 {
941 unsigned long flags;
942 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
943 dprintkdbg(DBG_1,
944 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
945 DC395x_LOCK_IO(acb->scsi_host, flags);
946 waiting_process_next(acb);
947 DC395x_UNLOCK_IO(acb->scsi_host, flags);
948 }
949
950
951 /* Get the DCB for a given ID/LUN combination */
952 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
953 {
954 return acb->children[id][lun];
955 }
956
957
958 /* Send SCSI Request Block (srb) to adapter (acb) */
959 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
960 {
961 struct DeviceCtlBlk *dcb = srb->dcb;
962
963 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
964 acb->active_dcb ||
965 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
966 srb_waiting_append(dcb, srb);
967 waiting_process_next(acb);
968 return;
969 }
970
971 if (!start_scsi(acb, dcb, srb))
972 srb_going_append(dcb, srb);
973 else {
974 srb_waiting_insert(dcb, srb);
975 waiting_set_timer(acb, HZ / 50);
976 }
977 }
978
979
980 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
981 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
982 struct ScsiReqBlk *srb)
983 {
984 enum dma_data_direction dir = cmd->sc_data_direction;
985 dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
986 cmd->pid, dcb->target_id, dcb->target_lun);
987
988 srb->dcb = dcb;
989 srb->cmd = cmd;
990 srb->sg_count = 0;
991 srb->total_xfer_length = 0;
992 srb->sg_bus_addr = 0;
993 srb->virt_addr = NULL;
994 srb->sg_index = 0;
995 srb->adapter_status = 0;
996 srb->target_status = 0;
997 srb->msg_count = 0;
998 srb->status = 0;
999 srb->flag = 0;
1000 srb->state = 0;
1001 srb->retry_count = 0;
1002 srb->tag_number = TAG_NONE;
1003 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1004 srb->end_message = 0;
1005
1006 if (dir == PCI_DMA_NONE || !cmd->request_buffer) {
1007 dprintkdbg(DBG_0,
1008 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1009 cmd->bufflen, cmd->request_buffer,
1010 cmd->use_sg, srb->segment_x[0].address);
1011 } else if (cmd->use_sg) {
1012 int i;
1013 u32 reqlen = cmd->request_bufflen;
1014 struct scatterlist *sl = (struct scatterlist *)
1015 cmd->request_buffer;
1016 struct SGentry *sgp = srb->segment_x;
1017 srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg,
1018 dir);
1019 dprintkdbg(DBG_0,
1020 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1021 reqlen, cmd->request_buffer, cmd->use_sg,
1022 srb->sg_count);
1023
1024 srb->virt_addr = page_address(sl->page);
1025 for (i = 0; i < srb->sg_count; i++) {
1026 u32 busaddr = (u32)sg_dma_address(&sl[i]);
1027 u32 seglen = (u32)sl[i].length;
1028 sgp[i].address = busaddr;
1029 sgp[i].length = seglen;
1030 srb->total_xfer_length += seglen;
1031 }
1032 sgp += srb->sg_count - 1;
1033
1034 /*
1035 * adjust last page if too big as it is allocated
1036 * on even page boundaries
1037 */
1038 if (srb->total_xfer_length > reqlen) {
1039 sgp->length -= (srb->total_xfer_length - reqlen);
1040 srb->total_xfer_length = reqlen;
1041 }
1042
1043 /* Fixup for WIDE padding - make sure length is even */
1044 if (dcb->sync_period & WIDE_SYNC &&
1045 srb->total_xfer_length % 2) {
1046 srb->total_xfer_length++;
1047 sgp->length++;
1048 }
1049
1050 srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1051 srb->segment_x,
1052 SEGMENTX_LEN,
1053 PCI_DMA_TODEVICE);
1054
1055 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1056 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1057 } else {
1058 srb->total_xfer_length = cmd->request_bufflen;
1059 srb->sg_count = 1;
1060 srb->segment_x[0].address =
1061 pci_map_single(dcb->acb->dev, cmd->request_buffer,
1062 srb->total_xfer_length, dir);
1063
1064 /* Fixup for WIDE padding - make sure length is even */
1065 if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2)
1066 srb->total_xfer_length++;
1067
1068 srb->segment_x[0].length = srb->total_xfer_length;
1069 srb->virt_addr = cmd->request_buffer;
1070 dprintkdbg(DBG_0,
1071 "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n",
1072 srb->total_xfer_length, cmd->request_buffer,
1073 cmd->use_sg, srb->segment_x[0].address);
1074 }
1075 }
1076
1077
1078 /**
1079 * dc395x_queue_command - queue scsi command passed from the mid
1080 * layer, invoke 'done' on completion
1081 *
1082 * @cmd: pointer to scsi command object
1083 * @done: function pointer to be invoked on completion
1084 *
1085 * Returns 1 if the adapter (host) is busy, else returns 0. One
1086 * reason for an adapter to be busy is that the number
1087 * of outstanding queued commands is already equal to
1088 * struct Scsi_Host::can_queue .
1089 *
1090 * Required: if struct Scsi_Host::can_queue is ever non-zero
1091 * then this function is required.
1092 *
1093 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1094 * and is expected to be held on return.
1095 *
1096 **/
1097 static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1098 {
1099 struct DeviceCtlBlk *dcb;
1100 struct ScsiReqBlk *srb;
1101 struct AdapterCtlBlk *acb =
1102 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1103 dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n",
1104 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
1105
1106 /* Assume BAD_TARGET; will be cleared later */
1107 cmd->result = DID_BAD_TARGET << 16;
1108
1109 /* ignore invalid targets */
1110 if (cmd->device->id >= acb->scsi_host->max_id ||
1111 cmd->device->lun >= acb->scsi_host->max_lun ||
1112 cmd->device->lun >31) {
1113 goto complete;
1114 }
1115
1116 /* does the specified lun on the specified device exist */
1117 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1118 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1119 cmd->device->id, cmd->device->lun);
1120 goto complete;
1121 }
1122
1123 /* do we have a DCB for the device */
1124 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1125 if (!dcb) {
1126 /* should never happen */
1127 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1128 cmd->device->id, cmd->device->lun);
1129 goto complete;
1130 }
1131
1132 /* set callback and clear result in the command */
1133 cmd->scsi_done = done;
1134 cmd->result = 0;
1135
1136 srb = srb_get_free(acb);
1137 if (!srb)
1138 {
1139 /*
1140 * Return 1 since we are unable to queue this command at this
1141 * point in time.
1142 */
1143 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1144 return 1;
1145 }
1146
1147 build_srb(cmd, dcb, srb);
1148
1149 if (!list_empty(&dcb->srb_waiting_list)) {
1150 /* append to waiting queue */
1151 srb_waiting_append(dcb, srb);
1152 waiting_process_next(acb);
1153 } else {
1154 /* process immediately */
1155 send_srb(acb, srb);
1156 }
1157 dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid);
1158 return 0;
1159
1160 complete:
1161 /*
1162 * Complete the command immediatey, and then return 0 to
1163 * indicate that we have handled the command. This is usually
1164 * done when the commad is for things like non existent
1165 * devices.
1166 */
1167 done(cmd);
1168 return 0;
1169 }
1170
1171
1172 /*
1173 * Return the disk geometry for the given SCSI device.
1174 */
1175 static int dc395x_bios_param(struct scsi_device *sdev,
1176 struct block_device *bdev, sector_t capacity, int *info)
1177 {
1178 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1179 int heads, sectors, cylinders;
1180 struct AdapterCtlBlk *acb;
1181 int size = capacity;
1182
1183 dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1184 acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1185 heads = 64;
1186 sectors = 32;
1187 cylinders = size / (heads * sectors);
1188
1189 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1190 heads = 255;
1191 sectors = 63;
1192 cylinders = size / (heads * sectors);
1193 }
1194 geom[0] = heads;
1195 geom[1] = sectors;
1196 geom[2] = cylinders;
1197 return 0;
1198 #else
1199 return scsicam_bios_param(bdev, capacity, info);
1200 #endif
1201 }
1202
1203
1204 static void dump_register_info(struct AdapterCtlBlk *acb,
1205 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1206 {
1207 u16 pstat;
1208 struct pci_dev *dev = acb->dev;
1209 pci_read_config_word(dev, PCI_STATUS, &pstat);
1210 if (!dcb)
1211 dcb = acb->active_dcb;
1212 if (!srb && dcb)
1213 srb = dcb->active_srb;
1214 if (srb) {
1215 if (!srb->cmd)
1216 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1217 srb, srb->cmd);
1218 else
1219 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) "
1220 "cmnd=0x%02x <%02i-%i>\n",
1221 srb, srb->cmd, srb->cmd->pid,
1222 srb->cmd->cmnd[0], srb->cmd->device->id,
1223 srb->cmd->device->lun);
1224 printk(" sglist=%p cnt=%i idx=%i len=%i\n",
1225 srb->segment_x, srb->sg_count, srb->sg_index,
1226 srb->total_xfer_length);
1227 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1228 srb->state, srb->status, srb->scsi_phase,
1229 (acb->active_dcb) ? "" : "not");
1230 }
1231 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1232 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1233 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1234 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1235 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1236 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1237 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1238 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1239 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1240 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1241 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1242 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1243 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1244 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1245 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1246 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1247 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1248 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1249 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1250 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1251 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1252 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1253 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1254 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1255 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1256 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1257 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1258 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1259 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1260 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1261 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1262 "pci{status=0x%04x}\n",
1263 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1264 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1265 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1266 pstat);
1267 }
1268
1269
1270 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1271 {
1272 #if debug_enabled(DBG_FIFO)
1273 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1274 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1275 if (!(fifocnt & 0x40))
1276 dprintkdbg(DBG_FIFO,
1277 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1278 fifocnt & 0x3f, lines, txt);
1279 #endif
1280 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1281 }
1282
1283
1284 static void reset_dev_param(struct AdapterCtlBlk *acb)
1285 {
1286 struct DeviceCtlBlk *dcb;
1287 struct NvRamType *eeprom = &acb->eeprom;
1288 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1289
1290 list_for_each_entry(dcb, &acb->dcb_list, list) {
1291 u8 period_index;
1292
1293 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1294 dcb->sync_period = 0;
1295 dcb->sync_offset = 0;
1296
1297 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1298 period_index = eeprom->target[dcb->target_id].period & 0x07;
1299 dcb->min_nego_period = clock_period[period_index];
1300 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1301 || !(acb->config & HCC_WIDE_CARD))
1302 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1303 }
1304 }
1305
1306
1307 /*
1308 * perform a hard reset on the SCSI bus
1309 * @cmd - some command for this host (for fetching hooks)
1310 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1311 */
1312 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1313 {
1314 struct AdapterCtlBlk *acb =
1315 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1316 dprintkl(KERN_INFO,
1317 "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n",
1318 cmd->pid, cmd->device->id, cmd->device->lun, cmd);
1319
1320 if (timer_pending(&acb->waiting_timer))
1321 del_timer(&acb->waiting_timer);
1322
1323 /*
1324 * disable interrupt
1325 */
1326 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1327 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1328 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1329 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1330
1331 reset_scsi_bus(acb);
1332 udelay(500);
1333
1334 /* We may be in serious trouble. Wait some seconds */
1335 acb->scsi_host->last_reset =
1336 jiffies + 3 * HZ / 2 +
1337 HZ * acb->eeprom.delay_time;
1338
1339 /*
1340 * re-enable interrupt
1341 */
1342 /* Clear SCSI FIFO */
1343 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1344 clear_fifo(acb, "eh_bus_reset");
1345 /* Delete pending IRQ */
1346 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1347 set_basic_config(acb);
1348
1349 reset_dev_param(acb);
1350 doing_srb_done(acb, DID_RESET, cmd, 0);
1351 acb->active_dcb = NULL;
1352 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1353 waiting_process_next(acb);
1354
1355 return SUCCESS;
1356 }
1357
1358 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1359 {
1360 int rc;
1361
1362 spin_lock_irq(cmd->device->host->host_lock);
1363 rc = __dc395x_eh_bus_reset(cmd);
1364 spin_unlock_irq(cmd->device->host->host_lock);
1365
1366 return rc;
1367 }
1368
1369 /*
1370 * abort an errant SCSI command
1371 * @cmd - command to be aborted
1372 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1373 */
1374 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1375 {
1376 /*
1377 * Look into our command queues: If it has not been sent already,
1378 * we remove it and return success. Otherwise fail.
1379 */
1380 struct AdapterCtlBlk *acb =
1381 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1382 struct DeviceCtlBlk *dcb;
1383 struct ScsiReqBlk *srb;
1384 dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n",
1385 cmd->pid, cmd->device->id, cmd->device->lun, cmd);
1386
1387 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1388 if (!dcb) {
1389 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1390 return FAILED;
1391 }
1392
1393 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1394 if (srb) {
1395 srb_waiting_remove(dcb, srb);
1396 pci_unmap_srb_sense(acb, srb);
1397 pci_unmap_srb(acb, srb);
1398 free_tag(dcb, srb);
1399 srb_free_insert(acb, srb);
1400 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1401 cmd->result = DID_ABORT << 16;
1402 return SUCCESS;
1403 }
1404 srb = find_cmd(cmd, &dcb->srb_going_list);
1405 if (srb) {
1406 dprintkl(KERN_DEBUG, "eh_abort: Command in progress");
1407 /* XXX: Should abort the command here */
1408 } else {
1409 dprintkl(KERN_DEBUG, "eh_abort: Command not found");
1410 }
1411 return FAILED;
1412 }
1413
1414
1415 /* SDTR */
1416 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1417 struct ScsiReqBlk *srb)
1418 {
1419 u8 *ptr = srb->msgout_buf + srb->msg_count;
1420 if (srb->msg_count > 1) {
1421 dprintkl(KERN_INFO,
1422 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1423 srb->msg_count, srb->msgout_buf[0],
1424 srb->msgout_buf[1]);
1425 return;
1426 }
1427 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1428 dcb->sync_offset = 0;
1429 dcb->min_nego_period = 200 >> 2;
1430 } else if (dcb->sync_offset == 0)
1431 dcb->sync_offset = SYNC_NEGO_OFFSET;
1432
1433 *ptr++ = MSG_EXTENDED; /* (01h) */
1434 *ptr++ = 3; /* length */
1435 *ptr++ = EXTENDED_SDTR; /* (01h) */
1436 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1437 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1438 srb->msg_count += 5;
1439 srb->state |= SRB_DO_SYNC_NEGO;
1440 }
1441
1442
1443 /* WDTR */
1444 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1445 struct ScsiReqBlk *srb)
1446 {
1447 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1448 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1449 u8 *ptr = srb->msgout_buf + srb->msg_count;
1450 if (srb->msg_count > 1) {
1451 dprintkl(KERN_INFO,
1452 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1453 srb->msg_count, srb->msgout_buf[0],
1454 srb->msgout_buf[1]);
1455 return;
1456 }
1457 *ptr++ = MSG_EXTENDED; /* (01h) */
1458 *ptr++ = 2; /* length */
1459 *ptr++ = EXTENDED_WDTR; /* (03h) */
1460 *ptr++ = wide;
1461 srb->msg_count += 4;
1462 srb->state |= SRB_DO_WIDE_NEGO;
1463 }
1464
1465
1466 #if 0
1467 /* Timer to work around chip flaw: When selecting and the bus is
1468 * busy, we sometimes miss a Selection timeout IRQ */
1469 void selection_timeout_missed(unsigned long ptr);
1470 /* Sets the timer to wake us up */
1471 static void selto_timer(struct AdapterCtlBlk *acb)
1472 {
1473 if (timer_pending(&acb->selto_timer))
1474 return;
1475 acb->selto_timer.function = selection_timeout_missed;
1476 acb->selto_timer.data = (unsigned long) acb;
1477 if (time_before
1478 (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
1479 acb->selto_timer.expires =
1480 acb->scsi_host->last_reset + HZ / 2 + 1;
1481 else
1482 acb->selto_timer.expires = jiffies + HZ + 1;
1483 add_timer(&acb->selto_timer);
1484 }
1485
1486
1487 void selection_timeout_missed(unsigned long ptr)
1488 {
1489 unsigned long flags;
1490 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1491 struct ScsiReqBlk *srb;
1492 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1493 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1494 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1495 return;
1496 }
1497 DC395x_LOCK_IO(acb->scsi_host, flags);
1498 srb = acb->active_dcb->active_srb;
1499 disconnect(acb);
1500 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1501 }
1502 #endif
1503
1504
1505 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1506 struct ScsiReqBlk* srb)
1507 {
1508 u16 s_stat2, return_code;
1509 u8 s_stat, scsicommand, i, identify_message;
1510 u8 *ptr;
1511 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n",
1512 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
1513
1514 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1515
1516 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1517 s_stat2 = 0;
1518 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1519 #if 1
1520 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1521 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n",
1522 srb->cmd->pid, s_stat, s_stat2);
1523 /*
1524 * Try anyway?
1525 *
1526 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1527 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed!
1528 * (This is likely to be a bug in the hardware. Obviously, most people
1529 * only have one initiator per SCSI bus.)
1530 * Instead let this fail and have the timer make sure the command is
1531 * tried again after a short time
1532 */
1533 /*selto_timer (acb); */
1534 return 1;
1535 }
1536 #endif
1537 if (acb->active_dcb) {
1538 dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a"
1539 "command while another command (pid#%li) is active.",
1540 srb->cmd->pid,
1541 acb->active_dcb->active_srb ?
1542 acb->active_dcb->active_srb->cmd->pid : 0);
1543 return 1;
1544 }
1545 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1546 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n",
1547 srb->cmd->pid);
1548 return 1;
1549 }
1550 /* Allow starting of SCSI commands half a second before we allow the mid-level
1551 * to queue them again after a reset */
1552 if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
1553 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1554 return 1;
1555 }
1556
1557 /* Flush FIFO */
1558 clear_fifo(acb, "start_scsi");
1559 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1560 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1561 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1562 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1563 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1564
1565 identify_message = dcb->identify_msg;
1566 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1567 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1568 if (srb->flag & AUTO_REQSENSE)
1569 identify_message &= 0xBF;
1570
1571 if (((srb->cmd->cmnd[0] == INQUIRY)
1572 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1573 || (srb->flag & AUTO_REQSENSE))
1574 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1575 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1576 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1577 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1578 && (dcb->target_lun == 0)) {
1579 srb->msgout_buf[0] = identify_message;
1580 srb->msg_count = 1;
1581 scsicommand = SCMD_SEL_ATNSTOP;
1582 srb->state = SRB_MSGOUT;
1583 #ifndef SYNC_FIRST
1584 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1585 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1586 build_wdtr(acb, dcb, srb);
1587 goto no_cmd;
1588 }
1589 #endif
1590 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1591 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1592 build_sdtr(acb, dcb, srb);
1593 goto no_cmd;
1594 }
1595 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1596 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1597 build_wdtr(acb, dcb, srb);
1598 goto no_cmd;
1599 }
1600 srb->msg_count = 0;
1601 }
1602 /* Send identify message */
1603 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1604
1605 scsicommand = SCMD_SEL_ATN;
1606 srb->state = SRB_START_;
1607 #ifndef DC395x_NO_TAGQ
1608 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1609 && (identify_message & 0xC0)) {
1610 /* Send Tag message */
1611 u32 tag_mask = 1;
1612 u8 tag_number = 0;
1613 while (tag_mask & dcb->tag_mask
1614 && tag_number <= dcb->max_command) {
1615 tag_mask = tag_mask << 1;
1616 tag_number++;
1617 }
1618 if (tag_number >= dcb->max_command) {
1619 dprintkl(KERN_WARNING, "start_scsi: (pid#%li) "
1620 "Out of tags target=<%02i-%i>)\n",
1621 srb->cmd->pid, srb->cmd->device->id,
1622 srb->cmd->device->lun);
1623 srb->state = SRB_READY;
1624 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1625 DO_HWRESELECT);
1626 return 1;
1627 }
1628 /* Send Tag id */
1629 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1630 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1631 dcb->tag_mask |= tag_mask;
1632 srb->tag_number = tag_number;
1633 scsicommand = SCMD_SEL_ATN3;
1634 srb->state = SRB_START_;
1635 }
1636 #endif
1637 /*polling:*/
1638 /* Send CDB ..command block ......... */
1639 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n",
1640 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
1641 srb->cmd->cmnd[0], srb->tag_number);
1642 if (srb->flag & AUTO_REQSENSE) {
1643 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1644 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1645 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1646 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1647 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
1648 sizeof(srb->cmd->sense_buffer));
1649 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1650 } else {
1651 ptr = (u8 *)srb->cmd->cmnd;
1652 for (i = 0; i < srb->cmd->cmd_len; i++)
1653 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1654 }
1655 no_cmd:
1656 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1657 DO_HWRESELECT | DO_DATALATCH);
1658 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1659 /*
1660 * If start_scsi return 1:
1661 * we caught an interrupt (must be reset or reselection ... )
1662 * : Let's process it first!
1663 */
1664 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
1665 srb->cmd->pid, dcb->target_id, dcb->target_lun);
1666 srb->state = SRB_READY;
1667 free_tag(dcb, srb);
1668 srb->msg_count = 0;
1669 return_code = 1;
1670 /* This IRQ should NOT get lost, as we did not acknowledge it */
1671 } else {
1672 /*
1673 * If start_scsi returns 0:
1674 * we know that the SCSI processor is free
1675 */
1676 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1677 dcb->active_srb = srb;
1678 acb->active_dcb = dcb;
1679 return_code = 0;
1680 /* it's important for atn stop */
1681 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1682 DO_DATALATCH | DO_HWRESELECT);
1683 /* SCSI command */
1684 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1685 }
1686 return return_code;
1687 }
1688
1689
1690 #define DC395x_ENABLE_MSGOUT \
1691 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1692 srb->state |= SRB_MSGOUT
1693
1694
1695 /* abort command */
1696 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1697 struct ScsiReqBlk *srb)
1698 {
1699 srb->msgout_buf[0] = ABORT;
1700 srb->msg_count = 1;
1701 DC395x_ENABLE_MSGOUT;
1702 srb->state &= ~SRB_MSGIN;
1703 srb->state |= SRB_MSGOUT;
1704 }
1705
1706
1707 /**
1708 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1709 * have been triggered for this card.
1710 *
1711 * @acb: a pointer to the adpter control block
1712 * @scsi_status: the status return when we checked the card
1713 **/
1714 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1715 u16 scsi_status)
1716 {
1717 struct DeviceCtlBlk *dcb;
1718 struct ScsiReqBlk *srb;
1719 u16 phase;
1720 u8 scsi_intstatus;
1721 unsigned long flags;
1722 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1723 u16 *);
1724
1725 DC395x_LOCK_IO(acb->scsi_host, flags);
1726
1727 /* This acknowledges the IRQ */
1728 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1729 if ((scsi_status & 0x2007) == 0x2002)
1730 dprintkl(KERN_DEBUG,
1731 "COP after COP completed? %04x\n", scsi_status);
1732 if (debug_enabled(DBG_KG)) {
1733 if (scsi_intstatus & INT_SELTIMEOUT)
1734 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1735 }
1736 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1737
1738 if (timer_pending(&acb->selto_timer))
1739 del_timer(&acb->selto_timer);
1740
1741 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1742 disconnect(acb); /* bus free interrupt */
1743 goto out_unlock;
1744 }
1745 if (scsi_intstatus & INT_RESELECTED) {
1746 reselect(acb);
1747 goto out_unlock;
1748 }
1749 if (scsi_intstatus & INT_SELECT) {
1750 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1751 goto out_unlock;
1752 }
1753 if (scsi_intstatus & INT_SCSIRESET) {
1754 scsi_reset_detect(acb);
1755 goto out_unlock;
1756 }
1757 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1758 dcb = acb->active_dcb;
1759 if (!dcb) {
1760 dprintkl(KERN_DEBUG,
1761 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1762 scsi_status, scsi_intstatus);
1763 goto out_unlock;
1764 }
1765 srb = dcb->active_srb;
1766 if (dcb->flag & ABORT_DEV_) {
1767 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1768 enable_msgout_abort(acb, srb);
1769 }
1770
1771 /* software sequential machine */
1772 phase = (u16)srb->scsi_phase;
1773
1774 /*
1775 * 62037 or 62137
1776 * call dc395x_scsi_phase0[]... "phase entry"
1777 * handle every phase before start transfer
1778 */
1779 /* data_out_phase0, phase:0 */
1780 /* data_in_phase0, phase:1 */
1781 /* command_phase0, phase:2 */
1782 /* status_phase0, phase:3 */
1783 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1784 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1785 /* msgout_phase0, phase:6 */
1786 /* msgin_phase0, phase:7 */
1787 dc395x_statev = dc395x_scsi_phase0[phase];
1788 dc395x_statev(acb, srb, &scsi_status);
1789
1790 /*
1791 * if there were any exception occured scsi_status
1792 * will be modify to bus free phase new scsi_status
1793 * transfer out from ... previous dc395x_statev
1794 */
1795 srb->scsi_phase = scsi_status & PHASEMASK;
1796 phase = (u16)scsi_status & PHASEMASK;
1797
1798 /*
1799 * call dc395x_scsi_phase1[]... "phase entry" handle
1800 * every phase to do transfer
1801 */
1802 /* data_out_phase1, phase:0 */
1803 /* data_in_phase1, phase:1 */
1804 /* command_phase1, phase:2 */
1805 /* status_phase1, phase:3 */
1806 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1807 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1808 /* msgout_phase1, phase:6 */
1809 /* msgin_phase1, phase:7 */
1810 dc395x_statev = dc395x_scsi_phase1[phase];
1811 dc395x_statev(acb, srb, &scsi_status);
1812 }
1813 out_unlock:
1814 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1815 }
1816
1817
1818 static irqreturn_t dc395x_interrupt(int irq, void *dev_id,
1819 struct pt_regs *regs)
1820 {
1821 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)dev_id;
1822 u16 scsi_status;
1823 u8 dma_status;
1824 irqreturn_t handled = IRQ_NONE;
1825
1826 /*
1827 * Check for pending interupt
1828 */
1829 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1830 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1831 if (scsi_status & SCSIINTERRUPT) {
1832 /* interupt pending - let's process it! */
1833 dc395x_handle_interrupt(acb, scsi_status);
1834 handled = IRQ_HANDLED;
1835 }
1836 else if (dma_status & 0x20) {
1837 /* Error from the DMA engine */
1838 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1839 #if 0
1840 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1841 if (acb->active_dcb) {
1842 acb->active_dcb-> flag |= ABORT_DEV_;
1843 if (acb->active_dcb->active_srb)
1844 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1845 }
1846 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1847 #else
1848 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1849 acb = NULL;
1850 #endif
1851 handled = IRQ_HANDLED;
1852 }
1853
1854 return handled;
1855 }
1856
1857
1858 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1859 u16 *pscsi_status)
1860 {
1861 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid);
1862 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1863 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1864
1865 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1866 srb->state &= ~SRB_MSGOUT;
1867 }
1868
1869
1870 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1871 u16 *pscsi_status)
1872 {
1873 u16 i;
1874 u8 *ptr;
1875 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid);
1876
1877 clear_fifo(acb, "msgout_phase1");
1878 if (!(srb->state & SRB_MSGOUT)) {
1879 srb->state |= SRB_MSGOUT;
1880 dprintkl(KERN_DEBUG,
1881 "msgout_phase1: (pid#%li) Phase unexpected\n",
1882 srb->cmd->pid); /* So what ? */
1883 }
1884 if (!srb->msg_count) {
1885 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
1886 srb->cmd->pid);
1887 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1888 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1889 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1890 return;
1891 }
1892 ptr = (u8 *)srb->msgout_buf;
1893 for (i = 0; i < srb->msg_count; i++)
1894 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1895 srb->msg_count = 0;
1896 if (srb->msgout_buf[0] == MSG_ABORT)
1897 srb->state = SRB_ABORT_SENT;
1898
1899 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1900 }
1901
1902
1903 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1904 u16 *pscsi_status)
1905 {
1906 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid);
1907 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1908 }
1909
1910
1911 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1912 u16 *pscsi_status)
1913 {
1914 struct DeviceCtlBlk *dcb;
1915 u8 *ptr;
1916 u16 i;
1917 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid);
1918
1919 clear_fifo(acb, "command_phase1");
1920 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1921 if (!(srb->flag & AUTO_REQSENSE)) {
1922 ptr = (u8 *)srb->cmd->cmnd;
1923 for (i = 0; i < srb->cmd->cmd_len; i++) {
1924 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1925 ptr++;
1926 }
1927 } else {
1928 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1929 dcb = acb->active_dcb;
1930 /* target id */
1931 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1932 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1933 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1934 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
1935 sizeof(srb->cmd->sense_buffer));
1936 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1937 }
1938 srb->state |= SRB_COMMAND;
1939 /* it's important for atn stop */
1940 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1941 /* SCSI command */
1942 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1943 }
1944
1945
1946 /*
1947 * Verify that the remaining space in the hw sg lists is the same as
1948 * the count of remaining bytes in srb->total_xfer_length
1949 */
1950 static void sg_verify_length(struct ScsiReqBlk *srb)
1951 {
1952 if (debug_enabled(DBG_SG)) {
1953 unsigned len = 0;
1954 unsigned idx = srb->sg_index;
1955 struct SGentry *psge = srb->segment_x + idx;
1956 for (; idx < srb->sg_count; psge++, idx++)
1957 len += psge->length;
1958 if (len != srb->total_xfer_length)
1959 dprintkdbg(DBG_SG,
1960 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1961 srb->total_xfer_length, len);
1962 }
1963 }
1964
1965
1966 /*
1967 * Compute the next Scatter Gather list index and adjust its length
1968 * and address if necessary; also compute virt_addr
1969 */
1970 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1971 {
1972 u8 idx;
1973 struct scatterlist *sg;
1974 struct scsi_cmnd *cmd = srb->cmd;
1975 int segment = cmd->use_sg;
1976 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
1977 struct SGentry *psge = srb->segment_x + srb->sg_index;
1978
1979 dprintkdbg(DBG_0,
1980 "sg_update_list: Transfered %i of %i bytes, %i remain\n",
1981 xferred, srb->total_xfer_length, left);
1982 if (xferred == 0) {
1983 /* nothing to update since we did not transfer any data */
1984 return;
1985 }
1986
1987 sg_verify_length(srb);
1988 srb->total_xfer_length = left; /* update remaining count */
1989 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1990 if (xferred >= psge->length) {
1991 /* Complete SG entries done */
1992 xferred -= psge->length;
1993 } else {
1994 /* Partial SG entry done */
1995 psge->length -= xferred;
1996 psge->address += xferred;
1997 srb->sg_index = idx;
1998 pci_dma_sync_single_for_device(srb->dcb->
1999 acb->dev,
2000 srb->sg_bus_addr,
2001 SEGMENTX_LEN,
2002 PCI_DMA_TODEVICE);
2003 break;
2004 }
2005 psge++;
2006 }
2007 sg_verify_length(srb);
2008
2009 /* we need the corresponding virtual address */
2010 if (!segment) {
2011 srb->virt_addr += xferred;
2012 return;
2013 }
2014
2015 /* We have to walk the scatterlist to find it */
2016 sg = (struct scatterlist *)cmd->request_buffer;
2017 while (segment--) {
2018 unsigned long mask =
2019 ~((unsigned long)sg->length - 1) & PAGE_MASK;
2020 if ((sg_dma_address(sg) & mask) == (psge->address & mask)) {
2021 srb->virt_addr = (page_address(sg->page)
2022 + psge->address -
2023 (psge->address & PAGE_MASK));
2024 return;
2025 }
2026 ++sg;
2027 }
2028
2029 dprintkl(KERN_ERR, "sg_update_list: sg_to_virt failed\n");
2030 srb->virt_addr = NULL;
2031 }
2032
2033
2034 /*
2035 * We have transfered a single byte (PIO mode?) and need to update
2036 * the count of bytes remaining (total_xfer_length) and update the sg
2037 * entry to either point to next byte in the current sg entry, or of
2038 * already at the end to point to the start of the next sg entry
2039 */
2040 static void sg_subtract_one(struct ScsiReqBlk *srb)
2041 {
2042 srb->total_xfer_length--;
2043 srb->segment_x[srb->sg_index].length--;
2044 if (srb->total_xfer_length &&
2045 !srb->segment_x[srb->sg_index].length) {
2046 if (debug_enabled(DBG_PIO))
2047 printk(" (next segment)");
2048 srb->sg_index++;
2049 sg_update_list(srb, srb->total_xfer_length);
2050 }
2051 }
2052
2053
2054 /*
2055 * cleanup_after_transfer
2056 *
2057 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2058 * KG: Currently called from StatusPhase1 ()
2059 * Should probably also be called from other places
2060 * Best might be to call it in DataXXPhase0, if new phase will differ
2061 */
2062 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2063 struct ScsiReqBlk *srb)
2064 {
2065 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2066 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2067 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2068 clear_fifo(acb, "cleanup/in");
2069 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2070 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2071 } else { /* write */
2072 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2073 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2074 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2075 clear_fifo(acb, "cleanup/out");
2076 }
2077 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2078 }
2079
2080
2081 /*
2082 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
2083 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2084 */
2085 #define DC395x_LASTPIO 4
2086
2087
2088 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2089 u16 *pscsi_status)
2090 {
2091 struct DeviceCtlBlk *dcb = srb->dcb;
2092 u16 scsi_status = *pscsi_status;
2093 u32 d_left_counter = 0;
2094 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
2095 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2096
2097 /*
2098 * KG: We need to drain the buffers before we draw any conclusions!
2099 * This means telling the DMA to push the rest into SCSI, telling
2100 * SCSI to push the rest to the bus.
2101 * However, the device might have been the one to stop us (phase
2102 * change), and the data in transit just needs to be accounted so
2103 * it can be retransmitted.)
2104 */
2105 /*
2106 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2107 * If we need more data, the DMA SG list will be freshly set up, anyway
2108 */
2109 dprintkdbg(DBG_PIO, "data_out_phase0: "
2110 "DMA{fifcnt=0x%02x fifostat=0x%02x} "
2111 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2112 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2113 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2114 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2115 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2116 srb->total_xfer_length);
2117 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2118
2119 if (!(srb->state & SRB_XFERPAD)) {
2120 if (scsi_status & PARITYERROR)
2121 srb->status |= PARITY_ERROR;
2122
2123 /*
2124 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2125 * is the no of bytes it got from the DMA engine not the no it
2126 * transferred successfully to the device. (And the difference could
2127 * be as much as the FIFO size, I guess ...)
2128 */
2129 if (!(scsi_status & SCSIXFERDONE)) {
2130 /*
2131 * when data transfer from DMA FIFO to SCSI FIFO
2132 * if there was some data left in SCSI FIFO
2133 */
2134 d_left_counter =
2135 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2136 0x1F);
2137 if (dcb->sync_period & WIDE_SYNC)
2138 d_left_counter <<= 1;
2139
2140 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2141 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2142 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2143 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2144 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2145 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2146 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2147 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2148 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2149 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2150 }
2151 /*
2152 * calculate all the residue data that not yet tranfered
2153 * SCSI transfer counter + left in SCSI FIFO data
2154 *
2155 * .....TRM_S1040_SCSI_COUNTER (24bits)
2156 * The counter always decrement by one for every SCSI byte transfer.
2157 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2158 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2159 */
2160 if (srb->total_xfer_length > DC395x_LASTPIO)
2161 d_left_counter +=
2162 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2163
2164 /* Is this a good idea? */
2165 /*clear_fifo(acb, "DOP1"); */
2166 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2167 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2168 && srb->cmd->request_bufflen % 2) {
2169 d_left_counter = 0;
2170 dprintkl(KERN_INFO,
2171 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2172 scsi_status);
2173 }
2174 /*
2175 * KG: Oops again. Same thinko as above: The SCSI might have been
2176 * faster than the DMA engine, so that it ran out of data.
2177 * In that case, we have to do just nothing!
2178 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2179 */
2180 /*
2181 * KG: This is nonsense: We have been WRITING data to the bus
2182 * If the SCSI engine has no bytes left, how should the DMA engine?
2183 */
2184 if (d_left_counter == 0) {
2185 srb->total_xfer_length = 0;
2186 } else {
2187 /*
2188 * if transfer not yet complete
2189 * there were some data residue in SCSI FIFO or
2190 * SCSI transfer counter not empty
2191 */
2192 long oldxferred =
2193 srb->total_xfer_length - d_left_counter;
2194 const int diff =
2195 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2196 sg_update_list(srb, d_left_counter);
2197 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2198 if ((srb->segment_x[srb->sg_index].length ==
2199 diff && srb->cmd->use_sg)
2200 || ((oldxferred & ~PAGE_MASK) ==
2201 (PAGE_SIZE - diff))
2202 ) {
2203 dprintkl(KERN_INFO, "data_out_phase0: "
2204 "Work around chip bug (%i)?\n", diff);
2205 d_left_counter =
2206 srb->total_xfer_length - diff;
2207 sg_update_list(srb, d_left_counter);
2208 /*srb->total_xfer_length -= diff; */
2209 /*srb->virt_addr += diff; */
2210 /*if (srb->cmd->use_sg) */
2211 /* srb->sg_index++; */
2212 }
2213 }
2214 }
2215 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2216 cleanup_after_transfer(acb, srb);
2217 }
2218 }
2219
2220
2221 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2222 u16 *pscsi_status)
2223 {
2224 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
2225 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2226 clear_fifo(acb, "data_out_phase1");
2227 /* do prepare before transfer when data out phase */
2228 data_io_transfer(acb, srb, XFERDATAOUT);
2229 }
2230
2231
2232 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2233 u16 *pscsi_status)
2234 {
2235 u16 scsi_status = *pscsi_status;
2236 u32 d_left_counter = 0;
2237 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
2238 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2239
2240 /*
2241 * KG: DataIn is much more tricky than DataOut. When the device is finished
2242 * and switches to another phase, the SCSI engine should be finished too.
2243 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2244 * engine and transferred to memory.
2245 * We should wait for the FIFOs to be emptied by that (is there any way to
2246 * enforce this?) and then stop the DMA engine, because it might think, that
2247 * there are more bytes to follow. Yes, the device might disconnect prior to
2248 * having all bytes transferred!
2249 * Also we should make sure that all data from the DMA engine buffer's really
2250 * made its way to the system memory! Some documentation on this would not
2251 * seem to be a bad idea, actually.
2252 */
2253 if (!(srb->state & SRB_XFERPAD)) {
2254 if (scsi_status & PARITYERROR) {
2255 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
2256 "Parity Error\n", srb->cmd->pid);
2257 srb->status |= PARITY_ERROR;
2258 }
2259 /*
2260 * KG: We should wait for the DMA FIFO to be empty ...
2261 * but: it would be better to wait first for the SCSI FIFO and then the
2262 * the DMA FIFO to become empty? How do we know, that the device not already
2263 * sent data to the FIFO in a MsgIn phase, eg.?
2264 */
2265 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2266 #if 0
2267 int ctr = 6000000;
2268 dprintkl(KERN_DEBUG,
2269 "DIP0: Wait for DMA FIFO to flush ...\n");
2270 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2271 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2272 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2273 while (!
2274 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2275 0x80) && --ctr);
2276 if (ctr < 6000000 - 1)
2277 dprintkl(KERN_DEBUG
2278 "DIP0: Had to wait for DMA ...\n");
2279 if (!ctr)
2280 dprintkl(KERN_ERR,
2281 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2282 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2283 #endif
2284 dprintkdbg(DBG_KG, "data_in_phase0: "
2285 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2286 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2287 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2288 }
2289 /* Now: Check remainig data: The SCSI counters should tell us ... */
2290 d_left_counter = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER)
2291 + ((DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f)
2292 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2293 0));
2294 dprintkdbg(DBG_KG, "data_in_phase0: "
2295 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2296 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2297 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2298 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2299 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2300 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2301 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2302 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2303 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2304 srb->total_xfer_length, d_left_counter);
2305 #if DC395x_LASTPIO
2306 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
2307 if (d_left_counter
2308 && srb->total_xfer_length <= DC395x_LASTPIO) {
2309 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2310 /*sg_update_list (srb, d_left_counter); */
2311 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) to "
2312 "%p for remaining %i bytes:",
2313 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f,
2314 (srb->dcb->sync_period & WIDE_SYNC) ?
2315 "words" : "bytes",
2316 srb->virt_addr,
2317 srb->total_xfer_length);
2318 if (srb->dcb->sync_period & WIDE_SYNC)
2319 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2320 CFG2_WIDEFIFO);
2321 while (DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) != 0x40) {
2322 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2323 *(srb->virt_addr)++ = byte;
2324 if (debug_enabled(DBG_PIO))
2325 printk(" %02x", byte);
2326 d_left_counter--;
2327 sg_subtract_one(srb);
2328 }
2329 if (srb->dcb->sync_period & WIDE_SYNC) {
2330 #if 1
2331 /* Read the last byte ... */
2332 if (srb->total_xfer_length > 0) {
2333 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2334 *(srb->virt_addr)++ = byte;
2335 srb->total_xfer_length--;
2336 if (debug_enabled(DBG_PIO))
2337 printk(" %02x", byte);
2338 }
2339 #endif
2340 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2341 }
2342 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2343 /*srb->total_xfer_length = 0; */
2344 if (debug_enabled(DBG_PIO))
2345 printk("\n");
2346 }
2347 #endif /* DC395x_LASTPIO */
2348
2349 #if 0
2350 /*
2351 * KG: This was in DATAOUT. Does it also belong here?
2352 * Nobody seems to know what counter and fifo_cnt count exactly ...
2353 */
2354 if (!(scsi_status & SCSIXFERDONE)) {
2355 /*
2356 * when data transfer from DMA FIFO to SCSI FIFO
2357 * if there was some data left in SCSI FIFO
2358 */
2359 d_left_counter =
2360 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2361 0x1F);
2362 if (srb->dcb->sync_period & WIDE_SYNC)
2363 d_left_counter <<= 1;
2364 /*
2365 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2366 * so need to *= 2
2367 * KG: Seems to be correct ...
2368 */
2369 }
2370 #endif
2371 /* KG: This should not be needed any more! */
2372 if (d_left_counter == 0
2373 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2374 #if 0
2375 int ctr = 6000000;
2376 u8 TempDMAstatus;
2377 do {
2378 TempDMAstatus =
2379 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2380 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2381 if (!ctr)
2382 dprintkl(KERN_ERR,
2383 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2384 srb->total_xfer_length = 0;
2385 #endif
2386 srb->total_xfer_length = d_left_counter;
2387 } else { /* phase changed */
2388 /*
2389 * parsing the case:
2390 * when a transfer not yet complete
2391 * but be disconnected by target
2392 * if transfer not yet complete
2393 * there were some data residue in SCSI FIFO or
2394 * SCSI transfer counter not empty
2395 */
2396 sg_update_list(srb, d_left_counter);
2397 }
2398 }
2399 /* KG: The target may decide to disconnect: Empty FIFO before! */
2400 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2401 cleanup_after_transfer(acb, srb);
2402 }
2403 }
2404
2405
2406 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2407 u16 *pscsi_status)
2408 {
2409 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
2410 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2411 data_io_transfer(acb, srb, XFERDATAIN);
2412 }
2413
2414
2415 static void data_io_transfer(struct AdapterCtlBlk *acb,
2416 struct ScsiReqBlk *srb, u16 io_dir)
2417 {
2418 struct DeviceCtlBlk *dcb = srb->dcb;
2419 u8 bval;
2420 dprintkdbg(DBG_0,
2421 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2422 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
2423 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2424 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2425 if (srb == acb->tmp_srb)
2426 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2427 if (srb->sg_index >= srb->sg_count) {
2428 /* can't happen? out of bounds error */
2429 return;
2430 }
2431
2432 if (srb->total_xfer_length > DC395x_LASTPIO) {
2433 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2434 /*
2435 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2436 * Maybe, even ABORTXFER would be appropriate
2437 */
2438 if (dma_status & XFERPENDING) {
2439 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2440 "Expect trouble!\n");
2441 dump_register_info(acb, dcb, srb);
2442 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2443 }
2444 /* clear_fifo(acb, "IO"); */
2445 /*
2446 * load what physical address of Scatter/Gather list table
2447 * want to be transfer
2448 */
2449 srb->state |= SRB_DATA_XFER;
2450 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2451 if (srb->cmd->use_sg) { /* with S/G */
2452 io_dir |= DMACMD_SG;
2453 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2454 srb->sg_bus_addr +
2455 sizeof(struct SGentry) *
2456 srb->sg_index);
2457 /* load how many bytes in the sg list table */
2458 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2459 ((u32)(srb->sg_count -
2460 srb->sg_index) << 3));
2461 } else { /* without S/G */
2462 io_dir &= ~DMACMD_SG;
2463 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2464 srb->segment_x[0].address);
2465 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2466 srb->segment_x[0].length);
2467 }
2468 /* load total transfer length (24bits) max value 16Mbyte */
2469 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2470 srb->total_xfer_length);
2471 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2472 if (io_dir & DMACMD_DIR) { /* read */
2473 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2474 SCMD_DMA_IN);
2475 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2476 } else {
2477 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2478 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2479 SCMD_DMA_OUT);
2480 }
2481
2482 }
2483 #if DC395x_LASTPIO
2484 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2485 /*
2486 * load what physical address of Scatter/Gather list table
2487 * want to be transfer
2488 */
2489 srb->state |= SRB_DATA_XFER;
2490 /* load total transfer length (24bits) max value 16Mbyte */
2491 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2492 srb->total_xfer_length);
2493 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2494 if (io_dir & DMACMD_DIR) { /* read */
2495 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2496 SCMD_FIFO_IN);
2497 } else { /* write */
2498 int ln = srb->total_xfer_length;
2499 if (srb->dcb->sync_period & WIDE_SYNC)
2500 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2501 CFG2_WIDEFIFO);
2502 dprintkdbg(DBG_PIO,
2503 "data_io_transfer: PIO %i bytes from %p:",
2504 srb->total_xfer_length, srb->virt_addr);
2505
2506 while (srb->total_xfer_length) {
2507 if (debug_enabled(DBG_PIO))
2508 printk(" %02x", (unsigned char) *(srb->virt_addr));
2509
2510 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
2511 *(srb->virt_addr)++);
2512
2513 sg_subtract_one(srb);
2514 }
2515 if (srb->dcb->sync_period & WIDE_SYNC) {
2516 if (ln % 2) {
2517 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2518 if (debug_enabled(DBG_PIO))
2519 printk(" |00");
2520 }
2521 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2522 }
2523 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2524 if (debug_enabled(DBG_PIO))
2525 printk("\n");
2526 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2527 SCMD_FIFO_OUT);
2528 }
2529 }
2530 #endif /* DC395x_LASTPIO */
2531 else { /* xfer pad */
2532 u8 data = 0, data2 = 0;
2533 if (srb->sg_count) {
2534 srb->adapter_status = H_OVER_UNDER_RUN;
2535 srb->status |= OVER_RUN;
2536 }
2537 /*
2538 * KG: despite the fact that we are using 16 bits I/O ops
2539 * the SCSI FIFO is only 8 bits according to the docs
2540 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2541 */
2542 if (dcb->sync_period & WIDE_SYNC) {
2543 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2544 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2545 CFG2_WIDEFIFO);
2546 if (io_dir & DMACMD_DIR) {
2547 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2548 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2549 } else {
2550 /* Danger, Robinson: If you find KGs
2551 * scattered over the wide disk, the driver
2552 * or chip is to blame :-( */
2553 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2554 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2555 }
2556 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2557 } else {
2558 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2559 /* Danger, Robinson: If you find a collection of Ks on your disk
2560 * something broke :-( */
2561 if (io_dir & DMACMD_DIR)
2562 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2563 else
2564 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2565 }
2566 srb->state |= SRB_XFERPAD;
2567 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2568 /* SCSI command */
2569 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2570 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2571 }
2572 }
2573
2574
2575 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2576 u16 *pscsi_status)
2577 {
2578 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
2579 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2580 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2581 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2582 srb->state = SRB_COMPLETED;
2583 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2584 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2585 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2586 }
2587
2588
2589 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2590 u16 *pscsi_status)
2591 {
2592 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
2593 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2594 srb->state = SRB_STATUS;
2595 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2596 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2597 }
2598
2599
2600 /* Check if the message is complete */
2601 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2602 {
2603 if (*msgbuf == EXTENDED_MESSAGE) {
2604 if (len < 2)
2605 return 0;
2606 if (len < msgbuf[1] + 2)
2607 return 0;
2608 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2609 if (len < 2)
2610 return 0;
2611 return 1;
2612 }
2613
2614 /* reject_msg */
2615 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2616 struct ScsiReqBlk *srb)
2617 {
2618 srb->msgout_buf[0] = MESSAGE_REJECT;
2619 srb->msg_count = 1;
2620 DC395x_ENABLE_MSGOUT;
2621 srb->state &= ~SRB_MSGIN;
2622 srb->state |= SRB_MSGOUT;
2623 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2624 srb->msgin_buf[0],
2625 srb->dcb->target_id, srb->dcb->target_lun);
2626 }
2627
2628
2629 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2630 struct DeviceCtlBlk *dcb, u8 tag)
2631 {
2632 struct ScsiReqBlk *srb = NULL;
2633 struct ScsiReqBlk *i;
2634 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
2635 srb->cmd->pid, tag, srb);
2636
2637 if (!(dcb->tag_mask & (1 << tag)))
2638 dprintkl(KERN_DEBUG,
2639 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2640 dcb->tag_mask, tag);
2641
2642 if (list_empty(&dcb->srb_going_list))
2643 goto mingx0;
2644 list_for_each_entry(i, &dcb->srb_going_list, list) {
2645 if (i->tag_number == tag) {
2646 srb = i;
2647 break;
2648 }
2649 }
2650 if (!srb)
2651 goto mingx0;
2652
2653 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
2654 srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun);
2655 if (dcb->flag & ABORT_DEV_) {
2656 /*srb->state = SRB_ABORT_SENT; */
2657 enable_msgout_abort(acb, srb);
2658 }
2659
2660 if (!(srb->state & SRB_DISCONNECT))
2661 goto mingx0;
2662
2663 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2664 srb->state |= dcb->active_srb->state;
2665 srb->state |= SRB_DATA_XFER;
2666 dcb->active_srb = srb;
2667 /* How can we make the DORS happy? */
2668 return srb;
2669
2670 mingx0:
2671 srb = acb->tmp_srb;
2672 srb->state = SRB_UNEXPECT_RESEL;
2673 dcb->active_srb = srb;
2674 srb->msgout_buf[0] = MSG_ABORT_TAG;
2675 srb->msg_count = 1;
2676 DC395x_ENABLE_MSGOUT;
2677 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2678 return srb;
2679 }
2680
2681
2682 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2683 struct DeviceCtlBlk *dcb)
2684 {
2685 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2686 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2687 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2688 set_xfer_rate(acb, dcb);
2689 }
2690
2691
2692 /* set async transfer mode */
2693 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2694 {
2695 struct DeviceCtlBlk *dcb = srb->dcb;
2696 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2697 dcb->target_id, dcb->target_lun);
2698
2699 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2700 dcb->sync_mode |= SYNC_NEGO_DONE;
2701 /*dcb->sync_period &= 0; */
2702 dcb->sync_offset = 0;
2703 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2704 srb->state &= ~SRB_DO_SYNC_NEGO;
2705 reprogram_regs(acb, dcb);
2706 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2707 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2708 build_wdtr(acb, dcb, srb);
2709 DC395x_ENABLE_MSGOUT;
2710 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2711 }
2712 }
2713
2714
2715 /* set sync transfer mode */
2716 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2717 {
2718 struct DeviceCtlBlk *dcb = srb->dcb;
2719 u8 bval;
2720 int fact;
2721 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2722 "(%02i.%01i MHz) Offset %i\n",
2723 dcb->target_id, srb->msgin_buf[3] << 2,
2724 (250 / srb->msgin_buf[3]),
2725 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2726 srb->msgin_buf[4]);
2727
2728 if (srb->msgin_buf[4] > 15)
2729 srb->msgin_buf[4] = 15;
2730 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2731 dcb->sync_offset = 0;
2732 else if (dcb->sync_offset == 0)
2733 dcb->sync_offset = srb->msgin_buf[4];
2734 if (srb->msgin_buf[4] > dcb->sync_offset)
2735 srb->msgin_buf[4] = dcb->sync_offset;
2736 else
2737 dcb->sync_offset = srb->msgin_buf[4];
2738 bval = 0;
2739 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2740 || dcb->min_nego_period >
2741 clock_period[bval]))
2742 bval++;
2743 if (srb->msgin_buf[3] < clock_period[bval])
2744 dprintkl(KERN_INFO,
2745 "msgin_set_sync: Increase sync nego period to %ins\n",
2746 clock_period[bval] << 2);
2747 srb->msgin_buf[3] = clock_period[bval];
2748 dcb->sync_period &= 0xf0;
2749 dcb->sync_period |= ALT_SYNC | bval;
2750 dcb->min_nego_period = srb->msgin_buf[3];
2751
2752 if (dcb->sync_period & WIDE_SYNC)
2753 fact = 500;
2754 else
2755 fact = 250;
2756
2757 dprintkl(KERN_INFO,
2758 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2759 dcb->target_id, (fact == 500) ? "Wide16" : "",
2760 dcb->min_nego_period << 2, dcb->sync_offset,
2761 (fact / dcb->min_nego_period),
2762 ((fact % dcb->min_nego_period) * 10 +
2763 dcb->min_nego_period / 2) / dcb->min_nego_period);
2764
2765 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2766 /* Reply with corrected SDTR Message */
2767 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2768 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2769
2770 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2771 srb->msg_count = 5;
2772 DC395x_ENABLE_MSGOUT;
2773 dcb->sync_mode |= SYNC_NEGO_DONE;
2774 } else {
2775 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2776 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2777 build_wdtr(acb, dcb, srb);
2778 DC395x_ENABLE_MSGOUT;
2779 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2780 }
2781 }
2782 srb->state &= ~SRB_DO_SYNC_NEGO;
2783 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2784
2785 reprogram_regs(acb, dcb);
2786 }
2787
2788
2789 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2790 struct ScsiReqBlk *srb)
2791 {
2792 struct DeviceCtlBlk *dcb = srb->dcb;
2793 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2794
2795 dcb->sync_period &= ~WIDE_SYNC;
2796 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2797 dcb->sync_mode |= WIDE_NEGO_DONE;
2798 srb->state &= ~SRB_DO_WIDE_NEGO;
2799 reprogram_regs(acb, dcb);
2800 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2801 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2802 build_sdtr(acb, dcb, srb);
2803 DC395x_ENABLE_MSGOUT;
2804 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2805 }
2806 }
2807
2808 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2809 {
2810 struct DeviceCtlBlk *dcb = srb->dcb;
2811 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2812 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2813 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2814
2815 if (srb->msgin_buf[3] > wide)
2816 srb->msgin_buf[3] = wide;
2817 /* Completed */
2818 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2819 dprintkl(KERN_DEBUG,
2820 "msgin_set_wide: Wide nego initiated <%02i>\n",
2821 dcb->target_id);
2822 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2823 srb->msg_count = 4;
2824 srb->state |= SRB_DO_WIDE_NEGO;
2825 DC395x_ENABLE_MSGOUT;
2826 }
2827
2828 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2829 if (srb->msgin_buf[3] > 0)
2830 dcb->sync_period |= WIDE_SYNC;
2831 else
2832 dcb->sync_period &= ~WIDE_SYNC;
2833 srb->state &= ~SRB_DO_WIDE_NEGO;
2834 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2835 dprintkdbg(DBG_1,
2836 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2837 (8 << srb->msgin_buf[3]), dcb->target_id);
2838 reprogram_regs(acb, dcb);
2839 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2840 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2841 build_sdtr(acb, dcb, srb);
2842 DC395x_ENABLE_MSGOUT;
2843 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2844 }
2845 }
2846
2847
2848 /*
2849 * extended message codes:
2850 *
2851 * code description
2852 *
2853 * 02h Reserved
2854 * 00h MODIFY DATA POINTER
2855 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2856 * 03h WIDE DATA TRANSFER REQUEST
2857 * 04h - 7Fh Reserved
2858 * 80h - FFh Vendor specific
2859 */
2860 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2861 u16 *pscsi_status)
2862 {
2863 struct DeviceCtlBlk *dcb = acb->active_dcb;
2864 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid);
2865
2866 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2867 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2868 /* Now eval the msg */
2869 switch (srb->msgin_buf[0]) {
2870 case DISCONNECT:
2871 srb->state = SRB_DISCONNECT;
2872 break;
2873
2874 case SIMPLE_QUEUE_TAG:
2875 case HEAD_OF_QUEUE_TAG:
2876 case ORDERED_QUEUE_TAG:
2877 srb =
2878 msgin_qtag(acb, dcb,
2879 srb->msgin_buf[1]);
2880 break;
2881
2882 case MESSAGE_REJECT:
2883 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2884 DO_CLRATN | DO_DATALATCH);
2885 /* A sync nego message was rejected ! */
2886 if (srb->state & SRB_DO_SYNC_NEGO) {
2887 msgin_set_async(acb, srb);
2888 break;
2889 }
2890 /* A wide nego message was rejected ! */
2891 if (srb->state & SRB_DO_WIDE_NEGO) {
2892 msgin_set_nowide(acb, srb);
2893 break;
2894 }
2895 enable_msgout_abort(acb, srb);
2896 /*srb->state |= SRB_ABORT_SENT */
2897 break;
2898
2899 case EXTENDED_MESSAGE:
2900 /* SDTR */
2901 if (srb->msgin_buf[1] == 3
2902 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2903 msgin_set_sync(acb, srb);
2904 break;
2905 }
2906 /* WDTR */
2907 if (srb->msgin_buf[1] == 2
2908 && srb->msgin_buf[2] == EXTENDED_WDTR
2909 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2910 msgin_set_wide(acb, srb);
2911 break;
2912 }
2913 msgin_reject(acb, srb);
2914 break;
2915
2916 case MSG_IGNOREWIDE:
2917 /* Discard wide residual */
2918 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2919 break;
2920
2921 case COMMAND_COMPLETE:
2922 /* nothing has to be done */
2923 break;
2924
2925 case SAVE_POINTERS:
2926 /*
2927 * SAVE POINTER may be ignored as we have the struct
2928 * ScsiReqBlk* associated with the scsi command.
2929 */
2930 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2931 "SAVE POINTER rem=%i Ignore\n",
2932 srb->cmd->pid, srb->total_xfer_length);
2933 break;
2934
2935 case RESTORE_POINTERS:
2936 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2937 break;
2938
2939 case ABORT:
2940 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2941 "<%02i-%i> ABORT msg\n",
2942 srb->cmd->pid, dcb->target_id,
2943 dcb->target_lun);
2944 dcb->flag |= ABORT_DEV_;
2945 enable_msgout_abort(acb, srb);
2946 break;
2947
2948 default:
2949 /* reject unknown messages */
2950 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2951 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2952 srb->msg_count = 1;
2953 srb->msgout_buf[0] = dcb->identify_msg;
2954 DC395x_ENABLE_MSGOUT;
2955 srb->state |= SRB_MSGOUT;
2956 /*break; */
2957 }
2958 msgin_reject(acb, srb);
2959 }
2960
2961 /* Clear counter and MsgIn state */
2962 srb->state &= ~SRB_MSGIN;
2963 acb->msg_len = 0;
2964 }
2965 *pscsi_status = PH_BUS_FREE;
2966 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2967 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2968 }
2969
2970
2971 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2972 u16 *pscsi_status)
2973 {
2974 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid);
2975 clear_fifo(acb, "msgin_phase1");
2976 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2977 if (!(srb->state & SRB_MSGIN)) {
2978 srb->state &= ~SRB_DISCONNECT;
2979 srb->state |= SRB_MSGIN;
2980 }
2981 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2982 /* SCSI command */
2983 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2984 }
2985
2986
2987 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2988 u16 *pscsi_status)
2989 {
2990 }
2991
2992
2993 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2994 u16 *pscsi_status)
2995 {
2996 }
2997
2998
2999 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3000 {
3001 struct DeviceCtlBlk *i;
3002
3003 /* set all lun device's period, offset */
3004 if (dcb->identify_msg & 0x07)
3005 return;
3006
3007 if (acb->scan_devices) {
3008 current_sync_offset = dcb->sync_offset;
3009 return;
3010 }
3011
3012 list_for_each_entry(i, &acb->dcb_list, list)
3013 if (i->target_id == dcb->target_id) {
3014 i->sync_period = dcb->sync_period;
3015 i->sync_offset = dcb->sync_offset;
3016 i->sync_mode = dcb->sync_mode;
3017 i->min_nego_period = dcb->min_nego_period;
3018 }
3019 }
3020
3021
3022 static void disconnect(struct AdapterCtlBlk *acb)
3023 {
3024 struct DeviceCtlBlk *dcb = acb->active_dcb;
3025 struct ScsiReqBlk *srb;
3026
3027 if (!dcb) {
3028 dprintkl(KERN_ERR, "disconnect: No such device\n");
3029 udelay(500);
3030 /* Suspend queue for a while */
3031 acb->scsi_host->last_reset =
3032 jiffies + HZ / 2 +
3033 HZ * acb->eeprom.delay_time;
3034 clear_fifo(acb, "disconnectEx");
3035 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3036 return;
3037 }
3038 srb = dcb->active_srb;
3039 acb->active_dcb = NULL;
3040 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid);
3041
3042 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3043 clear_fifo(acb, "disconnect");
3044 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3045 if (srb->state & SRB_UNEXPECT_RESEL) {
3046 dprintkl(KERN_ERR,
3047 "disconnect: Unexpected reselection <%02i-%i>\n",
3048 dcb->target_id, dcb->target_lun);
3049 srb->state = 0;
3050 waiting_process_next(acb);
3051 } else if (srb->state & SRB_ABORT_SENT) {
3052 dcb->flag &= ~ABORT_DEV_;
3053 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3054 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3055 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3056 waiting_process_next(acb);
3057 } else {
3058 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3059 || !(srb->
3060 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3061 /*
3062 * Selection time out
3063 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3064 */
3065 /* Unexp. Disc / Sel Timeout */
3066 if (srb->state != SRB_START_
3067 && srb->state != SRB_MSGOUT) {
3068 srb->state = SRB_READY;
3069 dprintkl(KERN_DEBUG,
3070 "disconnect: (pid#%li) Unexpected\n",
3071 srb->cmd->pid);
3072 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3073 goto disc1;
3074 } else {
3075 /* Normal selection timeout */
3076 dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
3077 "<%02i-%i> SelTO\n", srb->cmd->pid,
3078 dcb->target_id, dcb->target_lun);
3079 if (srb->retry_count++ > DC395x_MAX_RETRIES
3080 || acb->scan_devices) {
3081 srb->target_status =
3082 SCSI_STAT_SEL_TIMEOUT;
3083 goto disc1;
3084 }
3085 free_tag(dcb, srb);
3086 srb_going_to_waiting_move(dcb, srb);
3087 dprintkdbg(DBG_KG,
3088 "disconnect: (pid#%li) Retry\n",
3089 srb->cmd->pid);
3090 waiting_set_timer(acb, HZ / 20);
3091 }
3092 } else if (srb->state & SRB_DISCONNECT) {
3093 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3094 /*
3095 * SRB_DISCONNECT (This is what we expect!)
3096 */
3097 if (bval & 0x40) {
3098 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3099 " 0x%02x: ACK set! Other controllers?\n",
3100 bval);
3101 /* It could come from another initiator, therefore don't do much ! */
3102 } else
3103 waiting_process_next(acb);
3104 } else if (srb->state & SRB_COMPLETED) {
3105 disc1:
3106 /*
3107 ** SRB_COMPLETED
3108 */
3109 free_tag(dcb, srb);
3110 dcb->active_srb = NULL;
3111 srb->state = SRB_FREE;
3112 srb_done(acb, dcb, srb);
3113 }
3114 }
3115 }
3116
3117
3118 static void reselect(struct AdapterCtlBlk *acb)
3119 {
3120 struct DeviceCtlBlk *dcb = acb->active_dcb;
3121 struct ScsiReqBlk *srb = NULL;
3122 u16 rsel_tar_lun_id;
3123 u8 id, lun;
3124 u8 arblostflag = 0;
3125 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3126
3127 clear_fifo(acb, "reselect");
3128 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3129 /* Read Reselected Target ID and LUN */
3130 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3131 if (dcb) { /* Arbitration lost but Reselection win */
3132 srb = dcb->active_srb;
3133 if (!srb) {
3134 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3135 "but active_srb == NULL\n");
3136 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3137 return;
3138 }
3139 /* Why the if ? */
3140 if (!acb->scan_devices) {
3141 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
3142 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3143 srb->cmd->pid, dcb->target_id,
3144 dcb->target_lun, rsel_tar_lun_id,
3145 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3146 arblostflag = 1;
3147 /*srb->state |= SRB_DISCONNECT; */
3148
3149 srb->state = SRB_READY;
3150 free_tag(dcb, srb);
3151 srb_going_to_waiting_move(dcb, srb);
3152 waiting_set_timer(acb, HZ / 20);
3153
3154 /* return; */
3155 }
3156 }
3157 /* Read Reselected Target Id and LUN */
3158 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3159 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3160 "Got %i!\n", rsel_tar_lun_id);
3161 id = rsel_tar_lun_id & 0xff;
3162 lun = (rsel_tar_lun_id >> 8) & 7;
3163 dcb = find_dcb(acb, id, lun);
3164 if (!dcb) {
3165 dprintkl(KERN_ERR, "reselect: From non existent device "
3166 "<%02i-%i>\n", id, lun);
3167 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3168 return;
3169 }
3170 acb->active_dcb = dcb;
3171
3172 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3173 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3174 "disconnection? <%02i-%i>\n",
3175 dcb->target_id, dcb->target_lun);
3176
3177 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3178 srb = acb->tmp_srb;
3179 dcb->active_srb = srb;
3180 } else {
3181 /* There can be only one! */
3182 srb = dcb->active_srb;
3183 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3184 /*
3185 * abort command
3186 */
3187 dprintkl(KERN_DEBUG,
3188 "reselect: w/o disconnected cmds <%02i-%i>\n",
3189 dcb->target_id, dcb->target_lun);
3190 srb = acb->tmp_srb;
3191 srb->state = SRB_UNEXPECT_RESEL;
3192 dcb->active_srb = srb;
3193 enable_msgout_abort(acb, srb);
3194 } else {
3195 if (dcb->flag & ABORT_DEV_) {
3196 /*srb->state = SRB_ABORT_SENT; */
3197 enable_msgout_abort(acb, srb);
3198 } else
3199 srb->state = SRB_DATA_XFER;
3200
3201 }
3202 }
3203 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3204
3205 /* Program HA ID, target ID, period and offset */
3206 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3207 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3208 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3209 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3210 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3211 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3212 /* SCSI command */
3213 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3214 }
3215
3216
3217 static inline u8 tagq_blacklist(char *name)
3218 {
3219 #ifndef DC395x_NO_TAGQ
3220 #if 0
3221 u8 i;
3222 for (i = 0; i < BADDEVCNT; i++)
3223 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3224 return 1;
3225 #endif
3226 return 0;
3227 #else
3228 return 1;
3229 #endif
3230 }
3231
3232
3233 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3234 {
3235 /* Check for SCSI format (ANSI and Response data format) */
3236 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3237 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3238 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3239 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3240 /* ((dcb->dev_type == TYPE_DISK)
3241 || (dcb->dev_type == TYPE_MOD)) && */
3242 !tagq_blacklist(((char *)ptr) + 8)) {
3243 if (dcb->max_command == 1)
3244 dcb->max_command =
3245 dcb->acb->tag_max_num;
3246 dcb->sync_mode |= EN_TAG_QUEUEING;
3247 /*dcb->tag_mask = 0; */
3248 } else
3249 dcb->max_command = 1;
3250 }
3251 }
3252
3253
3254 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3255 struct ScsiInqData *ptr)
3256 {
3257 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3258 dcb->dev_type = bval1;
3259 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3260 disc_tagq_set(dcb, ptr);
3261 }
3262
3263
3264 /* unmap mapped pci regions from SRB */
3265 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3266 {
3267 struct scsi_cmnd *cmd = srb->cmd;
3268 enum dma_data_direction dir = cmd->sc_data_direction;
3269 if (cmd->use_sg && dir != PCI_DMA_NONE) {
3270 /* unmap DC395x SG list */
3271 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3272 srb->sg_bus_addr, SEGMENTX_LEN);
3273 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3274 SEGMENTX_LEN,
3275 PCI_DMA_TODEVICE);
3276 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3277 cmd->use_sg, cmd->request_buffer);
3278 /* unmap the sg segments */
3279 pci_unmap_sg(acb->dev,
3280 (struct scatterlist *)cmd->request_buffer,
3281 cmd->use_sg, dir);
3282 } else if (cmd->request_buffer && dir != PCI_DMA_NONE) {
3283 dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n",
3284 srb->segment_x[0].address, cmd->request_bufflen);
3285 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3286 cmd->request_bufflen, dir);
3287 }
3288 }
3289
3290
3291 /* unmap mapped pci sense buffer from SRB */
3292 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3293 struct ScsiReqBlk *srb)
3294 {
3295 if (!(srb->flag & AUTO_REQSENSE))
3296 return;
3297 /* Unmap sense buffer */
3298 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3299 srb->segment_x[0].address);
3300 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3301 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3302 /* Restore SG stuff */
3303 srb->total_xfer_length = srb->xferred;
3304 srb->segment_x[0].address =
3305 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3306 srb->segment_x[0].length =
3307 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3308 }
3309
3310
3311 /*
3312 * Complete execution of a SCSI command
3313 * Signal completion to the generic SCSI driver
3314 */
3315 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3316 struct ScsiReqBlk *srb)
3317 {
3318 u8 tempcnt, status;
3319 struct scsi_cmnd *cmd = srb->cmd;
3320 struct ScsiInqData *ptr;
3321 enum dma_data_direction dir = cmd->sc_data_direction;
3322
3323 if (cmd->use_sg) {
3324 struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer;
3325 ptr = (struct ScsiInqData *)(page_address(sg->page) + sg->offset);
3326 } else {
3327 ptr = (struct ScsiInqData *)(cmd->request_buffer);
3328 }
3329
3330 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid,
3331 srb->cmd->device->id, srb->cmd->device->lun);
3332 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p addr=%p\n",
3333 srb, cmd->use_sg, srb->sg_index, srb->sg_count,
3334 cmd->request_buffer, ptr);
3335 status = srb->target_status;
3336 if (srb->flag & AUTO_REQSENSE) {
3337 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3338 pci_unmap_srb_sense(acb, srb);
3339 /*
3340 ** target status..........................
3341 */
3342 srb->flag &= ~AUTO_REQSENSE;
3343 srb->adapter_status = 0;
3344 srb->target_status = CHECK_CONDITION << 1;
3345 if (debug_enabled(DBG_1)) {
3346 switch (cmd->sense_buffer[2] & 0x0f) {
3347 case NOT_READY:
3348 dprintkl(KERN_DEBUG,
3349 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3350 cmd->cmnd[0], dcb->target_id,
3351 dcb->target_lun, status, acb->scan_devices);
3352 break;
3353 case UNIT_ATTENTION:
3354 dprintkl(KERN_DEBUG,
3355 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3356 cmd->cmnd[0], dcb->target_id,
3357 dcb->target_lun, status, acb->scan_devices);
3358 break;
3359 case ILLEGAL_REQUEST:
3360 dprintkl(KERN_DEBUG,
3361 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3362 cmd->cmnd[0], dcb->target_id,
3363 dcb->target_lun, status, acb->scan_devices);
3364 break;
3365 case MEDIUM_ERROR:
3366 dprintkl(KERN_DEBUG,
3367 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3368 cmd->cmnd[0], dcb->target_id,
3369 dcb->target_lun, status, acb->scan_devices);
3370 break;
3371 case HARDWARE_ERROR:
3372 dprintkl(KERN_DEBUG,
3373 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3374 cmd->cmnd[0], dcb->target_id,
3375 dcb->target_lun, status, acb->scan_devices);
3376 break;
3377 }
3378 if (cmd->sense_buffer[7] >= 6)
3379 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3380 "(0x%08x 0x%08x)\n",
3381 cmd->sense_buffer[2], cmd->sense_buffer[12],
3382 cmd->sense_buffer[13],
3383 *((unsigned int *)(cmd->sense_buffer + 3)),
3384 *((unsigned int *)(cmd->sense_buffer + 8)));
3385 else
3386 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3387 cmd->sense_buffer[2],
3388 *((unsigned int *)(cmd->sense_buffer + 3)));
3389 }
3390
3391 if (status == (CHECK_CONDITION << 1)) {
3392 cmd->result = DID_BAD_TARGET << 16;
3393 goto ckc_e;
3394 }
3395 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3396
3397 if (srb->total_xfer_length
3398 && srb->total_xfer_length >= cmd->underflow)
3399 cmd->result =
3400 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3401 srb->end_message, CHECK_CONDITION);
3402 /*SET_RES_DID(cmd->result,DID_OK) */
3403 else
3404 cmd->result =
3405 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3406 srb->end_message, CHECK_CONDITION);
3407
3408 goto ckc_e;
3409 }
3410
3411 /*************************************************************/
3412 if (status) {
3413 /*
3414 * target status..........................
3415 */
3416 if (status_byte(status) == CHECK_CONDITION) {
3417 request_sense(acb, dcb, srb);
3418 return;
3419 } else if (status_byte(status) == QUEUE_FULL) {
3420 tempcnt = (u8)list_size(&dcb->srb_going_list);
3421 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3422 dcb->target_id, dcb->target_lun, tempcnt);
3423 if (tempcnt > 1)
3424 tempcnt--;
3425 dcb->max_command = tempcnt;
3426 free_tag(dcb, srb);
3427 srb_going_to_waiting_move(dcb, srb);
3428 waiting_set_timer(acb, HZ / 20);
3429 srb->adapter_status = 0;
3430 srb->target_status = 0;
3431 return;
3432 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3433 srb->adapter_status = H_SEL_TIMEOUT;
3434 srb->target_status = 0;
3435 cmd->result = DID_NO_CONNECT << 16;
3436 } else {
3437 srb->adapter_status = 0;
3438 SET_RES_DID(cmd->result, DID_ERROR);
3439 SET_RES_MSG(cmd->result, srb->end_message);
3440 SET_RES_TARGET(cmd->result, status);
3441
3442 }
3443 } else {
3444 /*
3445 ** process initiator status..........................
3446 */
3447 status = srb->adapter_status;
3448 if (status & H_OVER_UNDER_RUN) {
3449 srb->target_status = 0;
3450 SET_RES_DID(cmd->result, DID_OK);
3451 SET_RES_MSG(cmd->result, srb->end_message);
3452 } else if (srb->status & PARITY_ERROR) {
3453 SET_RES_DID(cmd->result, DID_PARITY);
3454 SET_RES_MSG(cmd->result, srb->end_message);
3455 } else { /* No error */
3456
3457 srb->adapter_status = 0;
3458 srb->target_status = 0;
3459 SET_RES_DID(cmd->result, DID_OK);
3460 }
3461 }
3462
3463 if (dir != PCI_DMA_NONE) {
3464 if (cmd->use_sg)
3465 pci_dma_sync_sg_for_cpu(acb->dev,
3466 (struct scatterlist *)cmd->
3467 request_buffer, cmd->use_sg, dir);
3468 else if (cmd->request_buffer)
3469 pci_dma_sync_single_for_cpu(acb->dev,
3470 srb->segment_x[0].address,
3471 cmd->request_bufflen, dir);
3472 }
3473
3474 if ((cmd->result & RES_DID) == 0 && cmd->cmnd[0] == INQUIRY
3475 && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8
3476 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3477 dcb->inquiry7 = ptr->Flags;
3478 /* Check Error Conditions */
3479 ckc_e:
3480
3481 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3482 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3483 if (cmd->cmnd[0] == INQUIRY && (cmd->result == (DID_OK << 16)
3484 || status_byte(cmd->
3485 result) &
3486 CHECK_CONDITION)) {
3487
3488 if (!dcb->init_tcq_flag) {
3489 add_dev(acb, dcb, ptr);
3490 dcb->init_tcq_flag = 1;
3491 }
3492
3493 }
3494
3495
3496 /* Here is the info for Doug Gilbert's sg3 ... */
3497 cmd->resid = srb->total_xfer_length;
3498 /* This may be interpreted by sb. or not ... */
3499 cmd->SCp.this_residual = srb->total_xfer_length;
3500 cmd->SCp.buffers_residual = 0;
3501 if (debug_enabled(DBG_KG)) {
3502 if (srb->total_xfer_length)
3503 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
3504 "cmnd=0x%02x Missed %i bytes\n",
3505 cmd->pid, cmd->device->id, cmd->device->lun,
3506 cmd->cmnd[0], srb->total_xfer_length);
3507 }
3508
3509 srb_going_remove(dcb, srb);
3510 /* Add to free list */
3511 if (srb == acb->tmp_srb)
3512 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3513 else {
3514 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
3515 cmd->pid, cmd->result);
3516 srb_free_insert(acb, srb);
3517 }
3518 pci_unmap_srb(acb, srb);
3519
3520 cmd->scsi_done(cmd);
3521 waiting_process_next(acb);
3522 }
3523
3524
3525 /* abort all cmds in our queues */
3526 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3527 struct scsi_cmnd *cmd, u8 force)
3528 {
3529 struct DeviceCtlBlk *dcb;
3530 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3531
3532 list_for_each_entry(dcb, &acb->dcb_list, list) {
3533 struct ScsiReqBlk *srb;
3534 struct ScsiReqBlk *tmp;
3535 struct scsi_cmnd *p;
3536
3537 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3538 enum dma_data_direction dir;
3539 int result;
3540
3541 p = srb->cmd;
3542 dir = p->sc_data_direction;
3543 result = MK_RES(0, did_flag, 0, 0);
3544 printk("G:%li(%02i-%i) ", p->pid,
3545 p->device->id, p->device->lun);
3546 srb_going_remove(dcb, srb);
3547 free_tag(dcb, srb);
3548 srb_free_insert(acb, srb);
3549 p->result = result;
3550 pci_unmap_srb_sense(acb, srb);
3551 pci_unmap_srb(acb, srb);
3552 if (force) {
3553 /* For new EH, we normally don't need to give commands back,
3554 * as they all complete or all time out */
3555 p->scsi_done(p);
3556 }
3557 }
3558 if (!list_empty(&dcb->srb_going_list))
3559 dprintkl(KERN_DEBUG,
3560 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3561 dcb->target_id, dcb->target_lun);
3562 if (dcb->tag_mask)
3563 dprintkl(KERN_DEBUG,
3564 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3565 dcb->target_id, dcb->target_lun,
3566 dcb->tag_mask);
3567
3568 /* Waiting queue */
3569 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3570 int result;
3571 p = srb->cmd;
3572
3573 result = MK_RES(0, did_flag, 0, 0);
3574 printk("W:%li<%02i-%i>", p->pid, p->device->id,
3575 p->device->lun);
3576 srb_waiting_remove(dcb, srb);
3577 srb_free_insert(acb, srb);
3578 p->result = result;
3579 pci_unmap_srb_sense(acb, srb);
3580 pci_unmap_srb(acb, srb);
3581 if (force) {
3582 /* For new EH, we normally don't need to give commands back,
3583 * as they all complete or all time out */
3584 cmd->scsi_done(cmd);
3585 }
3586 }
3587 if (!list_empty(&dcb->srb_waiting_list))
3588 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3589 list_size(&dcb->srb_waiting_list), dcb->target_id,
3590 dcb->target_lun);
3591 dcb->flag &= ~ABORT_DEV_;
3592 }
3593 printk("\n");
3594 }
3595
3596
3597 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3598 {
3599 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3600 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3601 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3602
3603 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3604 /* nothing */;
3605 }
3606
3607
3608 static void set_basic_config(struct AdapterCtlBlk *acb)
3609 {
3610 u8 bval;
3611 u16 wval;
3612 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3613 if (acb->config & HCC_PARITY)
3614 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3615 else
3616 bval = PHASELATCH | INITIATOR | BLOCKRST;
3617
3618 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3619
3620 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3621 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3622 /* program Host ID */
3623 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3624 /* set ansynchronous transfer */
3625 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3626 /* Turn LED control off */
3627 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3628 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3629 /* DMA config */
3630 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3631 wval |=
3632 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3633 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3634 /* Clear pending interrupt status */
3635 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3636 /* Enable SCSI interrupt */
3637 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3638 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3639 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3640 );
3641 }
3642
3643
3644 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3645 {
3646 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3647 /* delay half a second */
3648 if (timer_pending(&acb->waiting_timer))
3649 del_timer(&acb->waiting_timer);
3650
3651 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3652 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3653 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3654 udelay(500);
3655 /* Maybe we locked up the bus? Then lets wait even longer ... */
3656 acb->scsi_host->last_reset =
3657 jiffies + 5 * HZ / 2 +
3658 HZ * acb->eeprom.delay_time;
3659
3660 clear_fifo(acb, "scsi_reset_detect");
3661 set_basic_config(acb);
3662 /*1.25 */
3663 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3664
3665 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3666 acb->acb_flag |= RESET_DONE;
3667 } else {
3668 acb->acb_flag |= RESET_DETECT;
3669 reset_dev_param(acb);
3670 doing_srb_done(acb, DID_RESET, NULL, 1);
3671 /*DC395x_RecoverSRB( acb ); */
3672 acb->active_dcb = NULL;
3673 acb->acb_flag = 0;
3674 waiting_process_next(acb);
3675 }
3676 }
3677
3678
3679 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3680 struct ScsiReqBlk *srb)
3681 {
3682 struct scsi_cmnd *cmd = srb->cmd;
3683 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
3684 cmd->pid, cmd->device->id, cmd->device->lun);
3685
3686 srb->flag |= AUTO_REQSENSE;
3687 srb->adapter_status = 0;
3688 srb->target_status = 0;
3689
3690 /* KG: Can this prevent crap sense data ? */
3691 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
3692
3693 /* Save some data */
3694 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3695 srb->segment_x[0].address;
3696 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3697 srb->segment_x[0].length;
3698 srb->xferred = srb->total_xfer_length;
3699 /* srb->segment_x : a one entry of S/G list table */
3700 srb->total_xfer_length = sizeof(cmd->sense_buffer);
3701 srb->segment_x[0].length = sizeof(cmd->sense_buffer);
3702 /* Map sense buffer */
3703 srb->segment_x[0].address =
3704 pci_map_single(acb->dev, cmd->sense_buffer,
3705 sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE);
3706 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3707 cmd->sense_buffer, srb->segment_x[0].address,
3708 sizeof(cmd->sense_buffer));
3709 srb->sg_count = 1;
3710 srb->sg_index = 0;
3711
3712 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3713 dprintkl(KERN_DEBUG,
3714 "request_sense: (pid#%li) failed <%02i-%i>\n",
3715 srb->cmd->pid, dcb->target_id, dcb->target_lun);
3716 srb_going_to_waiting_move(dcb, srb);
3717 waiting_set_timer(acb, HZ / 100);
3718 }
3719 }
3720
3721
3722 /**
3723 * device_alloc - Allocate a new device instance. This create the
3724 * devices instance and sets up all the data items. The adapter
3725 * instance is required to obtain confiuration information for this
3726 * device. This does *not* add this device to the adapters device
3727 * list.
3728 *
3729 * @acb: The adapter to obtain configuration information from.
3730 * @target: The target for the new device.
3731 * @lun: The lun for the new device.
3732 *
3733 * Return the new device if succesfull or NULL on failure.
3734 **/
3735 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3736 u8 target, u8 lun)
3737 {
3738 struct NvRamType *eeprom = &acb->eeprom;
3739 u8 period_index = eeprom->target[target].period & 0x07;
3740 struct DeviceCtlBlk *dcb;
3741
3742 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3743 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3744 if (!dcb)
3745 return NULL;
3746 dcb->acb = NULL;
3747 INIT_LIST_HEAD(&dcb->srb_going_list);
3748 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3749 dcb->active_srb = NULL;
3750 dcb->tag_mask = 0;
3751 dcb->max_command = 1;
3752 dcb->target_id = target;
3753 dcb->target_lun = lun;
3754 #ifndef DC395x_NO_DISCONNECT
3755 dcb->identify_msg =
3756 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3757 #else
3758 dcb->identify_msg = IDENTIFY(0, lun);
3759 #endif
3760 dcb->dev_mode = eeprom->target[target].cfg0;
3761 dcb->inquiry7 = 0;
3762 dcb->sync_mode = 0;
3763 dcb->min_nego_period = clock_period[period_index];
3764 dcb->sync_period = 0;
3765 dcb->sync_offset = 0;
3766 dcb->flag = 0;
3767
3768 #ifndef DC395x_NO_WIDE
3769 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3770 && (acb->config & HCC_WIDE_CARD))
3771 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3772 #endif
3773 #ifndef DC395x_NO_SYNC
3774 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3775 if (!(lun) || current_sync_offset)
3776 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3777 #endif
3778 if (dcb->target_lun != 0) {
3779 /* Copy settings */
3780 struct DeviceCtlBlk *p;
3781 list_for_each_entry(p, &acb->dcb_list, list)
3782 if (p->target_id == dcb->target_id)
3783 break;
3784 dprintkdbg(DBG_1,
3785 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3786 dcb->target_id, dcb->target_lun,
3787 p->target_id, p->target_lun);
3788 dcb->sync_mode = p->sync_mode;
3789 dcb->sync_period = p->sync_period;
3790 dcb->min_nego_period = p->min_nego_period;
3791 dcb->sync_offset = p->sync_offset;
3792 dcb->inquiry7 = p->inquiry7;
3793 }
3794 return dcb;
3795 }
3796
3797
3798 /**
3799 * adapter_add_device - Adds the device instance to the adaptor instance.
3800 *
3801 * @acb: The adapter device to be updated
3802 * @dcb: A newly created and intialised device instance to add.
3803 **/
3804 static void adapter_add_device(struct AdapterCtlBlk *acb,
3805 struct DeviceCtlBlk *dcb)
3806 {
3807 /* backpointer to adapter */
3808 dcb->acb = acb;
3809
3810 /* set run_robin to this device if it is currently empty */
3811 if (list_empty(&acb->dcb_list))
3812 acb->dcb_run_robin = dcb;
3813
3814 /* add device to list */
3815 list_add_tail(&dcb->list, &acb->dcb_list);
3816
3817 /* update device maps */
3818 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3819 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3820 }
3821
3822
3823 /**
3824 * adapter_remove_device - Removes the device instance from the adaptor
3825 * instance. The device instance is not check in any way or freed by this.
3826 * The caller is expected to take care of that. This will simply remove the
3827 * device from the adapters data strcutures.
3828 *
3829 * @acb: The adapter device to be updated
3830 * @dcb: A device that has previously been added to the adapter.
3831 **/
3832 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3833 struct DeviceCtlBlk *dcb)
3834 {
3835 struct DeviceCtlBlk *i;
3836 struct DeviceCtlBlk *tmp;
3837 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3838 dcb->target_id, dcb->target_lun);
3839
3840 /* fix up any pointers to this device that we have in the adapter */
3841 if (acb->active_dcb == dcb)
3842 acb->active_dcb = NULL;
3843 if (acb->dcb_run_robin == dcb)
3844 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3845
3846 /* unlink from list */
3847 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3848 if (dcb == i) {
3849 list_del(&i->list);
3850 break;
3851 }
3852
3853 /* clear map and children */
3854 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3855 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3856 dcb->acb = NULL;
3857 }
3858
3859
3860 /**
3861 * adapter_remove_and_free_device - Removes a single device from the adapter
3862 * and then frees the device information.
3863 *
3864 * @acb: The adapter device to be updated
3865 * @dcb: A device that has previously been added to the adapter.
3866 */
3867 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3868 struct DeviceCtlBlk *dcb)
3869 {
3870 if (list_size(&dcb->srb_going_list) > 1) {
3871 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3872 "Won't remove because of %i active requests.\n",
3873 dcb->target_id, dcb->target_lun,
3874 list_size(&dcb->srb_going_list));
3875 return;
3876 }
3877 adapter_remove_device(acb, dcb);
3878 kfree(dcb);
3879 }
3880
3881
3882 /**
3883 * adapter_remove_and_free_all_devices - Removes and frees all of the
3884 * devices associated with the specified adapter.
3885 *
3886 * @acb: The adapter from which all devices should be removed.
3887 **/
3888 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3889 {
3890 struct DeviceCtlBlk *dcb;
3891 struct DeviceCtlBlk *tmp;
3892 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3893 list_size(&acb->dcb_list));
3894
3895 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3896 adapter_remove_and_free_device(acb, dcb);
3897 }
3898
3899
3900 /**
3901 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3902 * scsi device that we need to deal with. We allocate a new device and then
3903 * insert that device into the adapters device list.
3904 *
3905 * @scsi_device: The new scsi device that we need to handle.
3906 **/
3907 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3908 {
3909 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3910 struct DeviceCtlBlk *dcb;
3911
3912 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3913 if (!dcb)
3914 return -ENOMEM;
3915 adapter_add_device(acb, dcb);
3916
3917 return 0;
3918 }
3919
3920
3921 /**
3922 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3923 * device that is going away.
3924 *
3925 * @scsi_device: The new scsi device that we need to handle.
3926 **/
3927 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3928 {
3929 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3930 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3931 if (dcb)
3932 adapter_remove_and_free_device(acb, dcb);
3933 }
3934
3935
3936
3937
3938 /**
3939 * trms1040_wait_30us: wait for 30 us
3940 *
3941 * Waits for 30us (using the chip by the looks of it..)
3942 *
3943 * @io_port: base I/O address
3944 **/
3945 static void __devinit trms1040_wait_30us(unsigned long io_port)
3946 {
3947 /* ScsiPortStallExecution(30); wait 30 us */
3948 outb(5, io_port + TRM_S1040_GEN_TIMER);
3949 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3950 /* nothing */ ;
3951 }
3952
3953
3954 /**
3955 * trms1040_write_cmd - write the secified command and address to
3956 * chip
3957 *
3958 * @io_port: base I/O address
3959 * @cmd: SB + op code (command) to send
3960 * @addr: address to send
3961 **/
3962 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3963 {
3964 int i;
3965 u8 send_data;
3966
3967 /* program SB + OP code */
3968 for (i = 0; i < 3; i++, cmd <<= 1) {
3969 send_data = NVR_SELECT;
3970 if (cmd & 0x04) /* Start from bit 2 */
3971 send_data |= NVR_BITOUT;
3972
3973 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3974 trms1040_wait_30us(io_port);
3975 outb((send_data | NVR_CLOCK),
3976 io_port + TRM_S1040_GEN_NVRAM);
3977 trms1040_wait_30us(io_port);
3978 }
3979
3980 /* send address */
3981 for (i = 0; i < 7; i++, addr <<= 1) {
3982 send_data = NVR_SELECT;
3983 if (addr & 0x40) /* Start from bit 6 */
3984 send_data |= NVR_BITOUT;
3985
3986 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3987 trms1040_wait_30us(io_port);
3988 outb((send_data | NVR_CLOCK),
3989 io_port + TRM_S1040_GEN_NVRAM);
3990 trms1040_wait_30us(io_port);
3991 }
3992 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3993 trms1040_wait_30us(io_port);
3994 }
3995
3996
3997 /**
3998 * trms1040_set_data - store a single byte in the eeprom
3999 *
4000 * Called from write all to write a single byte into the SSEEPROM
4001 * Which is done one bit at a time.
4002 *
4003 * @io_port: base I/O address
4004 * @addr: offset into EEPROM
4005 * @byte: bytes to write
4006 **/
4007 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4008 {
4009 int i;
4010 u8 send_data;
4011
4012 /* Send write command & address */
4013 trms1040_write_cmd(io_port, 0x05, addr);
4014
4015 /* Write data */
4016 for (i = 0; i < 8; i++, byte <<= 1) {
4017 send_data = NVR_SELECT;
4018 if (byte & 0x80) /* Start from bit 7 */
4019 send_data |= NVR_BITOUT;
4020
4021 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4022 trms1040_wait_30us(io_port);
4023 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4024 trms1040_wait_30us(io_port);
4025 }
4026 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4027 trms1040_wait_30us(io_port);
4028
4029 /* Disable chip select */
4030 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4031 trms1040_wait_30us(io_port);
4032
4033 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4034 trms1040_wait_30us(io_port);
4035
4036 /* Wait for write ready */
4037 while (1) {
4038 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4039 trms1040_wait_30us(io_port);
4040
4041 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4042 trms1040_wait_30us(io_port);
4043
4044 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4045 break;
4046 }
4047
4048 /* Disable chip select */
4049 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4050 }
4051
4052
4053 /**
4054 * trms1040_write_all - write 128 bytes to the eeprom
4055 *
4056 * Write the supplied 128 bytes to the chips SEEPROM
4057 *
4058 * @eeprom: the data to write
4059 * @io_port: the base io port
4060 **/
4061 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4062 {
4063 u8 *b_eeprom = (u8 *)eeprom;
4064 u8 addr;
4065
4066 /* Enable SEEPROM */
4067 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4068 io_port + TRM_S1040_GEN_CONTROL);
4069
4070 /* write enable */
4071 trms1040_write_cmd(io_port, 0x04, 0xFF);
4072 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4073 trms1040_wait_30us(io_port);
4074
4075 /* write */
4076 for (addr = 0; addr < 128; addr++, b_eeprom++)
4077 trms1040_set_data(io_port, addr, *b_eeprom);
4078
4079 /* write disable */
4080 trms1040_write_cmd(io_port, 0x04, 0x00);
4081 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4082 trms1040_wait_30us(io_port);
4083
4084 /* Disable SEEPROM */
4085 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4086 io_port + TRM_S1040_GEN_CONTROL);
4087 }
4088
4089
4090 /**
4091 * trms1040_get_data - get a single byte from the eeprom
4092 *
4093 * Called from read all to read a single byte into the SSEEPROM
4094 * Which is done one bit at a time.
4095 *
4096 * @io_port: base I/O address
4097 * @addr: offset into SEEPROM
4098 *
4099 * Returns the the byte read.
4100 **/
4101 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4102 {
4103 int i;
4104 u8 read_byte;
4105 u8 result = 0;
4106
4107 /* Send read command & address */
4108 trms1040_write_cmd(io_port, 0x06, addr);
4109
4110 /* read data */
4111 for (i = 0; i < 8; i++) {
4112 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4113 trms1040_wait_30us(io_port);
4114 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4115
4116 /* Get data bit while falling edge */
4117 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4118 result <<= 1;
4119 if (read_byte & NVR_BITIN)
4120 result |= 1;
4121
4122 trms1040_wait_30us(io_port);
4123 }
4124
4125 /* Disable chip select */
4126 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4127 return result;
4128 }
4129
4130
4131 /**
4132 * trms1040_read_all - read all bytes from the eeprom
4133 *
4134 * Read the 128 bytes from the SEEPROM.
4135 *
4136 * @eeprom: where to store the data
4137 * @io_port: the base io port
4138 **/
4139 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4140 {
4141 u8 *b_eeprom = (u8 *)eeprom;
4142 u8 addr;
4143
4144 /* Enable SEEPROM */
4145 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4146 io_port + TRM_S1040_GEN_CONTROL);
4147
4148 /* read details */
4149 for (addr = 0; addr < 128; addr++, b_eeprom++)
4150 *b_eeprom = trms1040_get_data(io_port, addr);
4151
4152 /* Disable SEEPROM */
4153 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4154 io_port + TRM_S1040_GEN_CONTROL);
4155 }
4156
4157
4158
4159 /**
4160 * check_eeprom - get and check contents of the eeprom
4161 *
4162 * Read seeprom 128 bytes into the memory provider in eeprom.
4163 * Checks the checksum and if it's not correct it uses a set of default
4164 * values.
4165 *
4166 * @eeprom: caller allocated strcuture to read the eeprom data into
4167 * @io_port: io port to read from
4168 **/
4169 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4170 {
4171 u16 *w_eeprom = (u16 *)eeprom;
4172 u16 w_addr;
4173 u16 cksum;
4174 u32 d_addr;
4175 u32 *d_eeprom;
4176
4177 trms1040_read_all(eeprom, io_port); /* read eeprom */
4178
4179 cksum = 0;
4180 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4181 w_addr++, w_eeprom++)
4182 cksum += *w_eeprom;
4183 if (cksum != 0x1234) {
4184 /*
4185 * Checksum is wrong.
4186 * Load a set of defaults into the eeprom buffer
4187 */
4188 dprintkl(KERN_WARNING,
4189 "EEProm checksum error: using default values and options.\n");
4190 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4191 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4192 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4193 eeprom->sub_sys_id[1] =
4194 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4195 eeprom->sub_class = 0x00;
4196 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4197 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4198 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4199 eeprom->device_id[1] =
4200 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4201 eeprom->reserved = 0x00;
4202
4203 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4204 d_addr < 16; d_addr++, d_eeprom++)
4205 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4206
4207 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4208 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4209 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4210 *d_eeprom = 0x00;
4211
4212 /* Now load defaults (maybe set by boot/module params) */
4213 set_safe_settings();
4214 fix_settings();
4215 eeprom_override(eeprom);
4216
4217 eeprom->cksum = 0x00;
4218 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4219 w_addr < 63; w_addr++, w_eeprom++)
4220 cksum += *w_eeprom;
4221
4222 *w_eeprom = 0x1234 - cksum;
4223 trms1040_write_all(eeprom, io_port);
4224 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4225 } else {
4226 set_safe_settings();
4227 eeprom_index_to_delay(eeprom);
4228 eeprom_override(eeprom);
4229 }
4230 }
4231
4232
4233 /**
4234 * print_eeprom_settings - output the eeprom settings
4235 * to the kernel log so people can see what they were.
4236 *
4237 * @eeprom: The eeprom data strucutre to show details for.
4238 **/
4239 static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4240 {
4241 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4242 eeprom->scsi_id,
4243 eeprom->target[0].period,
4244 clock_speed[eeprom->target[0].period] / 10,
4245 clock_speed[eeprom->target[0].period] % 10,
4246 eeprom->target[0].cfg0);
4247 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4248 eeprom->channel_cfg, eeprom->max_tag,
4249 1 << eeprom->max_tag, eeprom->delay_time);
4250 }
4251
4252
4253 /* Free SG tables */
4254 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4255 {
4256 int i;
4257 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4258
4259 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4260 if (acb->srb_array[i].segment_x)
4261 kfree(acb->srb_array[i].segment_x);
4262 }
4263
4264
4265 /*
4266 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4267 * should never cross a page boundary */
4268 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4269 {
4270 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4271 *SEGMENTX_LEN;
4272 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4273 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4274 int srb_idx = 0;
4275 unsigned i = 0;
4276 struct SGentry *ptr;
4277
4278 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4279 acb->srb_array[i].segment_x = NULL;
4280
4281 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4282 while (pages--) {
4283 ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL);
4284 if (!ptr) {
4285 adapter_sg_tables_free(acb);
4286 return 1;
4287 }
4288 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4289 PAGE_SIZE, ptr, srb_idx);
4290 i = 0;
4291 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4292 acb->srb_array[srb_idx++].segment_x =
4293 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4294 }
4295 if (i < srbs_per_page)
4296 acb->srb.segment_x =
4297 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4298 else
4299 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4300 return 0;
4301 }
4302
4303
4304
4305 /**
4306 * adapter_print_config - print adapter connection and termination
4307 * config
4308 *
4309 * The io port in the adapter needs to have been set before calling
4310 * this function.
4311 *
4312 * @acb: The adapter to print the information for.
4313 **/
4314 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4315 {
4316 u8 bval;
4317
4318 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4319 dprintkl(KERN_INFO, "%sConnectors: ",
4320 ((bval & WIDESCSI) ? "(Wide) " : ""));
4321 if (!(bval & CON5068))
4322 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4323 if (!(bval & CON68))
4324 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4325 if (!(bval & CON50))
4326 printk("int50 ");
4327 if ((bval & (CON5068 | CON50 | CON68)) ==
4328 0 /*(CON5068 | CON50 | CON68) */ )
4329 printk(" Oops! (All 3?) ");
4330 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4331 printk(" Termination: ");
4332 if (bval & DIS_TERM)
4333 printk("Disabled\n");
4334 else {
4335 if (bval & AUTOTERM)
4336 printk("Auto ");
4337 if (bval & LOW8TERM)
4338 printk("Low ");
4339 if (bval & UP8TERM)
4340 printk("High ");
4341 printk("\n");
4342 }
4343 }
4344
4345
4346 /**
4347 * adapter_init_params - Initialize the various parameters in the
4348 * adapter structure. Note that the pointer to the scsi_host is set
4349 * early (when this instance is created) and the io_port and irq
4350 * values are set later after they have been reserved. This just gets
4351 * everything set to a good starting position.
4352 *
4353 * The eeprom structure in the adapter needs to have been set before
4354 * calling this function.
4355 *
4356 * @acb: The adapter to initialize.
4357 **/
4358 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4359 {
4360 struct NvRamType *eeprom = &acb->eeprom;
4361 int i;
4362
4363 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4364 /* NOTE: acb->io_port_base is set at port registration time */
4365 /* NOTE: acb->io_port_len is set at port registration time */
4366
4367 INIT_LIST_HEAD(&acb->dcb_list);
4368 acb->dcb_run_robin = NULL;
4369 acb->active_dcb = NULL;
4370
4371 INIT_LIST_HEAD(&acb->srb_free_list);
4372 /* temp SRB for Q tag used or abort command used */
4373 acb->tmp_srb = &acb->srb;
4374 init_timer(&acb->waiting_timer);
4375 init_timer(&acb->selto_timer);
4376
4377 acb->srb_count = DC395x_MAX_SRB_CNT;
4378
4379 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4380 /* NOTE: acb->irq_level is set at IRQ registration time */
4381
4382 acb->tag_max_num = 1 << eeprom->max_tag;
4383 if (acb->tag_max_num > 30)
4384 acb->tag_max_num = 30;
4385
4386 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4387 acb->gmode2 = eeprom->channel_cfg;
4388 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4389
4390 if (eeprom->channel_cfg & NAC_SCANLUN)
4391 acb->lun_chk = 1;
4392 acb->scan_devices = 1;
4393
4394 acb->scsi_host->this_id = eeprom->scsi_id;
4395 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4396
4397 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4398 acb->dcb_map[i] = 0;
4399
4400 acb->msg_len = 0;
4401
4402 /* link static array of srbs into the srb free list */
4403 for (i = 0; i < acb->srb_count - 1; i++)
4404 srb_free_insert(acb, &acb->srb_array[i]);
4405 }
4406
4407
4408 /**
4409 * adapter_init_host - Initialize the scsi host instance based on
4410 * values that we have already stored in the adapter instance. There's
4411 * some mention that a lot of these are deprecated, so we won't use
4412 * them (we'll use the ones in the adapter instance) but we'll fill
4413 * them in in case something else needs them.
4414 *
4415 * The eeprom structure, irq and io ports in the adapter need to have
4416 * been set before calling this function.
4417 *
4418 * @host: The scsi host instance to fill in the values for.
4419 **/
4420 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4421 {
4422 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4423 struct NvRamType *eeprom = &acb->eeprom;
4424
4425 host->max_cmd_len = 24;
4426 host->can_queue = DC395x_MAX_CMD_QUEUE;
4427 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4428 host->this_id = (int)eeprom->scsi_id;
4429 host->io_port = acb->io_port_base;
4430 host->n_io_port = acb->io_port_len;
4431 host->dma_channel = -1;
4432 host->unique_id = acb->io_port_base;
4433 host->irq = acb->irq_level;
4434 host->last_reset = jiffies;
4435
4436 host->max_id = 16;
4437 if (host->max_id - 1 == eeprom->scsi_id)
4438 host->max_id--;
4439
4440 #ifdef CONFIG_SCSI_MULTI_LUN
4441 if (eeprom->channel_cfg & NAC_SCANLUN)
4442 host->max_lun = 8;
4443 else
4444 host->max_lun = 1;
4445 #else
4446 host->max_lun = 1;
4447 #endif
4448
4449 }
4450
4451
4452 /**
4453 * adapter_init_chip - Get the chip into a know state and figure out
4454 * some of the settings that apply to this adapter.
4455 *
4456 * The io port in the adapter needs to have been set before calling
4457 * this function. The config will be configured correctly on return.
4458 *
4459 * @acb: The adapter which we are to init.
4460 **/
4461 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4462 {
4463 struct NvRamType *eeprom = &acb->eeprom;
4464
4465 /* Mask all the interrupt */
4466 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4467 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4468
4469 /* Reset SCSI module */
4470 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4471
4472 /* Reset PCI/DMA module */
4473 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4474 udelay(20);
4475
4476 /* program configuration 0 */
4477 acb->config = HCC_AUTOTERM | HCC_PARITY;
4478 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4479 acb->config |= HCC_WIDE_CARD;
4480
4481 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4482 acb->config |= HCC_SCSI_RESET;
4483
4484 if (acb->config & HCC_SCSI_RESET) {
4485 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4486 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4487
4488 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4489 /*spin_unlock_irq (&io_request_lock); */
4490 udelay(500);
4491
4492 acb->scsi_host->last_reset =
4493 jiffies + HZ / 2 +
4494 HZ * acb->eeprom.delay_time;
4495
4496 /*spin_lock_irq (&io_request_lock); */
4497 }
4498 }
4499
4500
4501 /**
4502 * init_adapter - Grab the resource for the card, setup the adapter
4503 * information, set the card into a known state, create the various
4504 * tables etc etc. This basically gets all adapter information all up
4505 * to date, intialised and gets the chip in sync with it.
4506 *
4507 * @host: This hosts adapter structure
4508 * @io_port: The base I/O port
4509 * @irq: IRQ
4510 *
4511 * Returns 0 if the initialization succeeds, any other value on
4512 * failure.
4513 **/
4514 static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4515 unsigned long io_port, u32 io_port_len, unsigned int irq)
4516 {
4517 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4518 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4519 goto failed;
4520 }
4521 /* store port base to indicate we have registered it */
4522 acb->io_port_base = io_port;
4523 acb->io_port_len = io_port_len;
4524
4525 if (request_irq(irq, dc395x_interrupt, SA_SHIRQ, DC395X_NAME, acb)) {
4526 /* release the region we just claimed */
4527 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4528 goto failed;
4529 }
4530 /* store irq to indicate we have registered it */
4531 acb->irq_level = irq;
4532
4533 /* get eeprom configuration information and command line settings etc */
4534 check_eeprom(&acb->eeprom, io_port);
4535 print_eeprom_settings(&acb->eeprom);
4536
4537 /* setup adapter control block */
4538 adapter_init_params(acb);
4539
4540 /* display card connectors/termination settings */
4541 adapter_print_config(acb);
4542
4543 if (adapter_sg_tables_alloc(acb)) {
4544 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4545 goto failed;
4546 }
4547 adapter_init_scsi_host(acb->scsi_host);
4548 adapter_init_chip(acb);
4549 set_basic_config(acb);
4550
4551 dprintkdbg(DBG_0,
4552 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4553 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4554 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4555 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4556 return 0;
4557
4558 failed:
4559 if (acb->irq_level)
4560 free_irq(acb->irq_level, acb);
4561 if (acb->io_port_base)
4562 release_region(acb->io_port_base, acb->io_port_len);
4563 adapter_sg_tables_free(acb);
4564
4565 return 1;
4566 }
4567
4568
4569 /**
4570 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4571 * stopping all operations and disabling interrupt generation on the
4572 * card.
4573 *
4574 * @acb: The adapter which we are to shutdown.
4575 **/
4576 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4577 {
4578 /* disable interrupts */
4579 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4580 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4581
4582 /* reset the scsi bus */
4583 if (acb->config & HCC_SCSI_RESET)
4584 reset_scsi_bus(acb);
4585
4586 /* clear any pending interupt state */
4587 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4588 }
4589
4590
4591
4592 /**
4593 * adapter_uninit - Shut down the chip and release any resources that
4594 * we had allocated. Once this returns the adapter should not be used
4595 * anymore.
4596 *
4597 * @acb: The adapter which we are to un-initialize.
4598 **/
4599 static void adapter_uninit(struct AdapterCtlBlk *acb)
4600 {
4601 unsigned long flags;
4602 DC395x_LOCK_IO(acb->scsi_host, flags);
4603
4604 /* remove timers */
4605 if (timer_pending(&acb->waiting_timer))
4606 del_timer(&acb->waiting_timer);
4607 if (timer_pending(&acb->selto_timer))
4608 del_timer(&acb->selto_timer);
4609
4610 adapter_uninit_chip(acb);
4611 adapter_remove_and_free_all_devices(acb);
4612 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4613
4614 if (acb->irq_level)
4615 free_irq(acb->irq_level, acb);
4616 if (acb->io_port_base)
4617 release_region(acb->io_port_base, acb->io_port_len);
4618
4619 adapter_sg_tables_free(acb);
4620 }
4621
4622
4623 #undef SPRINTF
4624 #define SPRINTF(args...) pos += sprintf(pos, args)
4625
4626 #undef YESNO
4627 #define YESNO(YN) \
4628 if (YN) SPRINTF(" Yes ");\
4629 else SPRINTF(" No ")
4630
4631 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4632 char **start, off_t offset, int length, int inout)
4633 {
4634 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4635 int spd, spd1;
4636 char *pos = buffer;
4637 struct DeviceCtlBlk *dcb;
4638 unsigned long flags;
4639 int dev;
4640
4641 if (inout) /* Has data been written to the file ? */
4642 return -EPERM;
4643
4644 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4645 SPRINTF(" Driver Version " DC395X_VERSION "\n");
4646
4647 DC395x_LOCK_IO(acb->scsi_host, flags);
4648
4649 SPRINTF("SCSI Host Nr %i, ", host->host_no);
4650 SPRINTF("DC395U/UW/F DC315/U %s\n",
4651 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4652 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4653 SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4654 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4655
4656 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4657 SPRINTF("AdapterID %i\n", host->this_id);
4658
4659 SPRINTF("tag_max_num %i", acb->tag_max_num);
4660 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4661 SPRINTF(", FilterCfg 0x%02x",
4662 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4663 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4664 /*SPRINTF("\n"); */
4665
4666 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4667 SPRINTF
4668 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4669 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4670 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4671 acb->dcb_map[6], acb->dcb_map[7]);
4672 SPRINTF
4673 (" %02x %02x %02x %02x %02x %02x %02x %02x\n",
4674 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4675 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4676 acb->dcb_map[14], acb->dcb_map[15]);
4677
4678 SPRINTF
4679 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4680
4681 dev = 0;
4682 list_for_each_entry(dcb, &acb->dcb_list, list) {
4683 int nego_period;
4684 SPRINTF("%02i %02i %02i ", dev, dcb->target_id,
4685 dcb->target_lun);
4686 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4687 YESNO(dcb->sync_offset);
4688 YESNO(dcb->sync_period & WIDE_SYNC);
4689 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4690 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4691 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4692 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4693 if (dcb->sync_offset)
4694 SPRINTF(" %03i ns ", nego_period);
4695 else
4696 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4697
4698 if (dcb->sync_offset & 0x0f) {
4699 spd = 1000 / (nego_period);
4700 spd1 = 1000 % (nego_period);
4701 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4702 SPRINTF(" %2i.%1i M %02i ", spd, spd1,
4703 (dcb->sync_offset & 0x0f));
4704 } else
4705 SPRINTF(" ");
4706
4707 /* Add more info ... */
4708 SPRINTF(" %02i\n", dcb->max_command);
4709 dev++;
4710 }
4711
4712 if (timer_pending(&acb->waiting_timer))
4713 SPRINTF("Waiting queue timer running\n");
4714 else
4715 SPRINTF("\n");
4716
4717 list_for_each_entry(dcb, &acb->dcb_list, list) {
4718 struct ScsiReqBlk *srb;
4719 if (!list_empty(&dcb->srb_waiting_list))
4720 SPRINTF("DCB (%02i-%i): Waiting: %i:",
4721 dcb->target_id, dcb->target_lun,
4722 list_size(&dcb->srb_waiting_list));
4723 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4724 SPRINTF(" %li", srb->cmd->pid);
4725 if (!list_empty(&dcb->srb_going_list))
4726 SPRINTF("\nDCB (%02i-%i): Going : %i:",
4727 dcb->target_id, dcb->target_lun,
4728 list_size(&dcb->srb_going_list));
4729 list_for_each_entry(srb, &dcb->srb_going_list, list)
4730 SPRINTF(" %li", srb->cmd->pid);
4731 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4732 SPRINTF("\n");
4733 }
4734
4735 if (debug_enabled(DBG_1)) {
4736 SPRINTF("DCB list for ACB %p:\n", acb);
4737 list_for_each_entry(dcb, &acb->dcb_list, list) {
4738 SPRINTF("%p -> ", dcb);
4739 }
4740 SPRINTF("END\n");
4741 }
4742
4743 *start = buffer + offset;
4744 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4745
4746 if (pos - buffer < offset)
4747 return 0;
4748 else if (pos - buffer - offset < length)
4749 return pos - buffer - offset;
4750 else
4751 return length;
4752 }
4753
4754
4755 static struct scsi_host_template dc395x_driver_template = {
4756 .module = THIS_MODULE,
4757 .proc_name = DC395X_NAME,
4758 .proc_info = dc395x_proc_info,
4759 .name = DC395X_BANNER " " DC395X_VERSION,
4760 .queuecommand = dc395x_queue_command,
4761 .bios_param = dc395x_bios_param,
4762 .slave_alloc = dc395x_slave_alloc,
4763 .slave_destroy = dc395x_slave_destroy,
4764 .can_queue = DC395x_MAX_CAN_QUEUE,
4765 .this_id = 7,
4766 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4767 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4768 .eh_abort_handler = dc395x_eh_abort,
4769 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4770 .unchecked_isa_dma = 0,
4771 .use_clustering = DISABLE_CLUSTERING,
4772 };
4773
4774
4775 /**
4776 * banner_display - Display banner on first instance of driver
4777 * initialized.
4778 **/
4779 static void banner_display(void)
4780 {
4781 static int banner_done = 0;
4782 if (!banner_done)
4783 {
4784 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4785 banner_done = 1;
4786 }
4787 }
4788
4789
4790 /**
4791 * dc395x_init_one - Initialise a single instance of the adapter.
4792 *
4793 * The PCI layer will call this once for each instance of the adapter
4794 * that it finds in the system. The pci_dev strcuture indicates which
4795 * instance we are being called from.
4796 *
4797 * @dev: The PCI device to intialize.
4798 * @id: Looks like a pointer to the entry in our pci device table
4799 * that was actually matched by the PCI subsystem.
4800 *
4801 * Returns 0 on success, or an error code (-ve) on failure.
4802 **/
4803 static int __devinit dc395x_init_one(struct pci_dev *dev,
4804 const struct pci_device_id *id)
4805 {
4806 struct Scsi_Host *scsi_host = NULL;
4807 struct AdapterCtlBlk *acb = NULL;
4808 unsigned long io_port_base;
4809 unsigned int io_port_len;
4810 unsigned int irq;
4811
4812 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4813 banner_display();
4814
4815 if (pci_enable_device(dev))
4816 {
4817 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4818 return -ENODEV;
4819 }
4820 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4821 io_port_len = pci_resource_len(dev, 0);
4822 irq = dev->irq;
4823 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4824
4825 /* allocate scsi host information (includes out adapter) */
4826 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4827 sizeof(struct AdapterCtlBlk));
4828 if (!scsi_host) {
4829 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4830 goto fail;
4831 }
4832 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4833 acb->scsi_host = scsi_host;
4834 acb->dev = dev;
4835
4836 /* initialise the adapter and everything we need */
4837 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4838 dprintkl(KERN_INFO, "adapter init failed\n");
4839 goto fail;
4840 }
4841
4842 pci_set_master(dev);
4843
4844 /* get the scsi mid level to scan for new devices on the bus */
4845 if (scsi_add_host(scsi_host, &dev->dev)) {
4846 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4847 goto fail;
4848 }
4849 pci_set_drvdata(dev, scsi_host);
4850 scsi_scan_host(scsi_host);
4851
4852 return 0;
4853
4854 fail:
4855 if (acb != NULL)
4856 adapter_uninit(acb);
4857 if (scsi_host != NULL)
4858 scsi_host_put(scsi_host);
4859 pci_disable_device(dev);
4860 return -ENODEV;
4861 }
4862
4863
4864 /**
4865 * dc395x_remove_one - Called to remove a single instance of the
4866 * adapter.
4867 *
4868 * @dev: The PCI device to intialize.
4869 **/
4870 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4871 {
4872 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4873 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4874
4875 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4876
4877 scsi_remove_host(scsi_host);
4878 adapter_uninit(acb);
4879 pci_disable_device(dev);
4880 scsi_host_put(scsi_host);
4881 pci_set_drvdata(dev, NULL);
4882 }
4883
4884
4885 static struct pci_device_id dc395x_pci_table[] = {
4886 {
4887 .vendor = PCI_VENDOR_ID_TEKRAM,
4888 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4889 .subvendor = PCI_ANY_ID,
4890 .subdevice = PCI_ANY_ID,
4891 },
4892 {} /* Terminating entry */
4893 };
4894 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4895
4896
4897 static struct pci_driver dc395x_driver = {
4898 .name = DC395X_NAME,
4899 .id_table = dc395x_pci_table,
4900 .probe = dc395x_init_one,
4901 .remove = __devexit_p(dc395x_remove_one),
4902 };
4903
4904
4905 /**
4906 * dc395x_module_init - Module initialization function
4907 *
4908 * Used by both module and built-in driver to initialise this driver.
4909 **/
4910 static int __init dc395x_module_init(void)
4911 {
4912 return pci_module_init(&dc395x_driver);
4913 }
4914
4915
4916 /**
4917 * dc395x_module_exit - Module cleanup function.
4918 **/
4919 static void __exit dc395x_module_exit(void)
4920 {
4921 pci_unregister_driver(&dc395x_driver);
4922 }
4923
4924
4925 module_init(dc395x_module_init);
4926 module_exit(dc395x_module_exit);
4927
4928 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4929 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4930 MODULE_LICENSE("GPL");
Linux 2.6 libata-dev (mirror)