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Linux 4.19.133
[linux/fpc-iii.git] / drivers / scsi / dc395x.c
blob3943347ec3c7ca02f1555d2ee371ede711588321
1 /*
2 * dc395x.c
3 *
4 * Device Driver for Tekram DC395(U/UW/F), DC315(U)
5 * PCI SCSI Bus Master Host Adapter
6 * (SCSI chip set used Tekram ASIC TRM-S1040)
7 *
8 * Authors:
9 * C.L. Huang <ching@tekram.com.tw>
10 * Erich Chen <erich@tekram.com.tw>
11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
12 *
13 * Kurt Garloff <garloff@suse.de>
14 * (C) 1999-2000 Kurt Garloff
15 *
16 * Oliver Neukum <oliver@neukum.name>
17 * Ali Akcaagac <aliakc@web.de>
18 * Jamie Lenehan <lenehan@twibble.org>
19 * (C) 2003
20 *
21 * License: GNU GPL
22 *
23 *************************************************************************
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. The name of the author may not be used to endorse or promote products
34 * derived from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 *
47 ************************************************************************
48 */
49 #include <linux/module.h>
50 #include <linux/moduleparam.h>
51 #include <linux/delay.h>
52 #include <linux/ctype.h>
53 #include <linux/blkdev.h>
54 #include <linux/interrupt.h>
55 #include <linux/init.h>
56 #include <linux/spinlock.h>
57 #include <linux/pci.h>
58 #include <linux/list.h>
59 #include <linux/vmalloc.h>
60 #include <linux/slab.h>
61 #include <asm/io.h>
62
63 #include <scsi/scsi.h>
64 #include <scsi/scsicam.h> /* needed for scsicam_bios_param */
65 #include <scsi/scsi_cmnd.h>
66 #include <scsi/scsi_device.h>
67 #include <scsi/scsi_host.h>
68
69 #include "dc395x.h"
70
71 #define DC395X_NAME "dc395x"
72 #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
73 #define DC395X_VERSION "v2.05, 2004/03/08"
74
75 /*---------------------------------------------------------------------------
76 Features
77 ---------------------------------------------------------------------------*/
78 /*
79 * Set to disable parts of the driver
80 */
81 /*#define DC395x_NO_DISCONNECT*/
82 /*#define DC395x_NO_TAGQ*/
83 /*#define DC395x_NO_SYNC*/
84 /*#define DC395x_NO_WIDE*/
85
86 /*---------------------------------------------------------------------------
87 Debugging
88 ---------------------------------------------------------------------------*/
89 /*
90 * Types of debugging that can be enabled and disabled
91 */
92 #define DBG_KG 0x0001
93 #define DBG_0 0x0002
94 #define DBG_1 0x0004
95 #define DBG_SG 0x0020
96 #define DBG_FIFO 0x0040
97 #define DBG_PIO 0x0080
98
99
100 /*
101 * Set set of things to output debugging for.
102 * Undefine to remove all debugging
103 */
104 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
105 /*#define DEBUG_MASK DBG_0*/
106
107
108 /*
109 * Output a kernel mesage at the specified level and append the
110 * driver name and a ": " to the start of the message
111 */
112 #define dprintkl(level, format, arg...) \
113 printk(level DC395X_NAME ": " format , ## arg)
114
115
116 #ifdef DEBUG_MASK
117 /*
118 * print a debug message - this is formated with KERN_DEBUG, then the
119 * driver name followed by a ": " and then the message is output.
120 * This also checks that the specified debug level is enabled before
121 * outputing the message
122 */
123 #define dprintkdbg(type, format, arg...) \
124 do { \
125 if ((type) & (DEBUG_MASK)) \
126 dprintkl(KERN_DEBUG , format , ## arg); \
127 } while (0)
128
129 /*
130 * Check if the specified type of debugging is enabled
131 */
132 #define debug_enabled(type) ((DEBUG_MASK) & (type))
133
134 #else
135 /*
136 * No debugging. Do nothing
137 */
138 #define dprintkdbg(type, format, arg...) \
139 do {} while (0)
140 #define debug_enabled(type) (0)
141
142 #endif
143
144
145 #ifndef PCI_VENDOR_ID_TEKRAM
146 #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */
147 #endif
148 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
149 #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */
150 #endif
151
152
153 #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
154 #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
155
156 #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address)))
157 #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address)))
158 #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address)))
159 #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address))
160 #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))
161 #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))
162
163 /* cmd->result */
164 #define RES_TARGET 0x000000FF /* Target State */
165 #define RES_TARGET_LNX STATUS_MASK /* Only official ... */
166 #define RES_ENDMSG 0x0000FF00 /* End Message */
167 #define RES_DID 0x00FF0000 /* DID_ codes */
168 #define RES_DRV 0xFF000000 /* DRIVER_ codes */
169
170 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
171 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
172
173 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
174 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
175 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
176 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
177 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
178
179 #define TAG_NONE 255
180
181 /*
182 * srb->segement_x is the hw sg list. It is always allocated as a
183 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
184 * cross a page boundy.
185 */
186 #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
187
188
189 struct SGentry {
190 u32 address; /* bus! address */
191 u32 length;
192 };
193
194 /* The SEEPROM structure for TRM_S1040 */
195 struct NVRamTarget {
196 u8 cfg0; /* Target configuration byte 0 */
197 u8 period; /* Target period */
198 u8 cfg2; /* Target configuration byte 2 */
199 u8 cfg3; /* Target configuration byte 3 */
200 };
201
202 struct NvRamType {
203 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */
204 u8 sub_sys_id[2]; /* 2,3 Sub System ID */
205 u8 sub_class; /* 4 Sub Class */
206 u8 vendor_id[2]; /* 5,6 Vendor ID */
207 u8 device_id[2]; /* 7,8 Device ID */
208 u8 reserved; /* 9 Reserved */
209 struct NVRamTarget target[DC395x_MAX_SCSI_ID];
210 /** 10,11,12,13
211 ** 14,15,16,17
212 ** ....
213 ** ....
214 ** 70,71,72,73
215 */
216 u8 scsi_id; /* 74 Host Adapter SCSI ID */
217 u8 channel_cfg; /* 75 Channel configuration */
218 u8 delay_time; /* 76 Power on delay time */
219 u8 max_tag; /* 77 Maximum tags */
220 u8 reserved0; /* 78 */
221 u8 boot_target; /* 79 */
222 u8 boot_lun; /* 80 */
223 u8 reserved1; /* 81 */
224 u16 reserved2[22]; /* 82,..125 */
225 u16 cksum; /* 126,127 */
226 };
227
228 struct ScsiReqBlk {
229 struct list_head list; /* next/prev ptrs for srb lists */
230 struct DeviceCtlBlk *dcb;
231 struct scsi_cmnd *cmd;
232
233 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */
234 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */
235
236 u8 sg_count; /* No of HW sg entries for this request */
237 u8 sg_index; /* Index of HW sg entry for this request */
238 size_t total_xfer_length; /* Total number of bytes remaining to be transferred */
239 size_t request_length; /* Total number of bytes in this request */
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 size_t 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 unsigned long last_reset;
312
313 u16 srb_count;
314
315 u8 sel_timeout;
316
317 unsigned int irq_level;
318 u8 tag_max_num;
319 u8 acb_flag;
320 u8 gmode2;
321
322 u8 config;
323 u8 lun_chk;
324 u8 scan_devices;
325 u8 hostid_bit;
326
327 u8 dcb_map[DC395x_MAX_SCSI_ID];
328 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
329
330 struct pci_dev *dev;
331
332 u8 msg_len;
333
334 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
335 struct ScsiReqBlk srb;
336
337 struct NvRamType eeprom; /* eeprom settings for this adapter */
338 };
339
340
341 /*---------------------------------------------------------------------------
342 Forward declarations
343 ---------------------------------------------------------------------------*/
344 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
345 u16 *pscsi_status);
346 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
347 u16 *pscsi_status);
348 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
349 u16 *pscsi_status);
350 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
351 u16 *pscsi_status);
352 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
353 u16 *pscsi_status);
354 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
355 u16 *pscsi_status);
356 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
357 u16 *pscsi_status);
358 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
359 u16 *pscsi_status);
360 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
361 u16 *pscsi_status);
362 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
363 u16 *pscsi_status);
364 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
365 u16 *pscsi_status);
366 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
367 u16 *pscsi_status);
368 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
369 u16 *pscsi_status);
370 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
371 u16 *pscsi_status);
372 static void set_basic_config(struct AdapterCtlBlk *acb);
373 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
374 struct ScsiReqBlk *srb);
375 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
376 static void data_io_transfer(struct AdapterCtlBlk *acb,
377 struct ScsiReqBlk *srb, u16 io_dir);
378 static void disconnect(struct AdapterCtlBlk *acb);
379 static void reselect(struct AdapterCtlBlk *acb);
380 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
381 struct ScsiReqBlk *srb);
382 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
383 struct ScsiReqBlk *srb);
384 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
385 struct ScsiReqBlk *srb);
386 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
387 struct scsi_cmnd *cmd, u8 force);
388 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
389 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
390 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
391 struct ScsiReqBlk *srb);
392 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
393 struct ScsiReqBlk *srb);
394 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
395 struct ScsiReqBlk *srb);
396 static void set_xfer_rate(struct AdapterCtlBlk *acb,
397 struct DeviceCtlBlk *dcb);
398 static void waiting_timeout(struct timer_list *t);
399
400
401 /*---------------------------------------------------------------------------
402 Static Data
403 ---------------------------------------------------------------------------*/
404 static u16 current_sync_offset = 0;
405
406 static void *dc395x_scsi_phase0[] = {
407 data_out_phase0,/* phase:0 */
408 data_in_phase0, /* phase:1 */
409 command_phase0, /* phase:2 */
410 status_phase0, /* phase:3 */
411 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
412 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
413 msgout_phase0, /* phase:6 */
414 msgin_phase0, /* phase:7 */
415 };
416
417 static void *dc395x_scsi_phase1[] = {
418 data_out_phase1,/* phase:0 */
419 data_in_phase1, /* phase:1 */
420 command_phase1, /* phase:2 */
421 status_phase1, /* phase:3 */
422 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
423 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
424 msgout_phase1, /* phase:6 */
425 msgin_phase1, /* phase:7 */
426 };
427
428 /*
429 *Fast20: 000 50ns, 20.0 MHz
430 * 001 75ns, 13.3 MHz
431 * 010 100ns, 10.0 MHz
432 * 011 125ns, 8.0 MHz
433 * 100 150ns, 6.6 MHz
434 * 101 175ns, 5.7 MHz
435 * 110 200ns, 5.0 MHz
436 * 111 250ns, 4.0 MHz
437 *
438 *Fast40(LVDS): 000 25ns, 40.0 MHz
439 * 001 50ns, 20.0 MHz
440 * 010 75ns, 13.3 MHz
441 * 011 100ns, 10.0 MHz
442 * 100 125ns, 8.0 MHz
443 * 101 150ns, 6.6 MHz
444 * 110 175ns, 5.7 MHz
445 * 111 200ns, 5.0 MHz
446 */
447 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
448
449 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
450 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
451 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
452
453
454 /*---------------------------------------------------------------------------
455 Configuration
456 ---------------------------------------------------------------------------*/
457 /*
458 * Module/boot parameters currently effect *all* instances of the
459 * card in the system.
460 */
461
462 /*
463 * Command line parameters are stored in a structure below.
464 * These are the index's into the structure for the various
465 * command line options.
466 */
467 #define CFG_ADAPTER_ID 0
468 #define CFG_MAX_SPEED 1
469 #define CFG_DEV_MODE 2
470 #define CFG_ADAPTER_MODE 3
471 #define CFG_TAGS 4
472 #define CFG_RESET_DELAY 5
473
474 #define CFG_NUM 6 /* number of configuration items */
475
476
477 /*
478 * Value used to indicate that a command line override
479 * hasn't been used to modify the value.
480 */
481 #define CFG_PARAM_UNSET -1
482
483
484 /*
485 * Hold command line parameters.
486 */
487 struct ParameterData {
488 int value; /* value of this setting */
489 int min; /* minimum value */
490 int max; /* maximum value */
491 int def; /* default value */
492 int safe; /* safe value */
493 };
494 static struct ParameterData cfg_data[] = {
495 { /* adapter id */
496 CFG_PARAM_UNSET,
497 0,
498 15,
499 7,
500 7
501 },
502 { /* max speed */
503 CFG_PARAM_UNSET,
504 0,
505 7,
506 1, /* 13.3Mhz */
507 4, /* 6.7Hmz */
508 },
509 { /* dev mode */
510 CFG_PARAM_UNSET,
511 0,
512 0x3f,
513 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
514 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
515 NTC_DO_SEND_START,
516 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
517 },
518 { /* adapter mode */
519 CFG_PARAM_UNSET,
520 0,
521 0x2f,
522 NAC_SCANLUN |
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 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 bool 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 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 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 number of actual seconds that the delay should be for.
622 */
623 static char 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 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 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 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: (0x%p) <%02i-%i> srb=%p\n",
782 srb->cmd, 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: (0x%p) <%02i-%i> srb=%p\n",
791 srb->cmd, 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: (0x%p) <%02i-%i> srb=%p\n",
799 srb->cmd, 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: (0x%p) <%02i-%i> srb=%p\n",
809 srb->cmd, 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: (0x%p) <%02i-%i> srb=%p\n",
825 srb->cmd, 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: (0x%p) <%02i-%i> srb=%p\n",
840 srb->cmd, 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: (0x%p) <%02i-%i> srb=%p\n",
850 srb->cmd, 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 if (time_before(jiffies + to, acb->last_reset - HZ / 2))
861 acb->waiting_timer.expires =
862 acb->last_reset - HZ / 2 + 1;
863 else
864 acb->waiting_timer.expires = jiffies + to + 1;
865 add_timer(&acb->waiting_timer);
866 }
867
868
869 /* Send the next command from the waiting list to the bus */
870 static void waiting_process_next(struct AdapterCtlBlk *acb)
871 {
872 struct DeviceCtlBlk *start = NULL;
873 struct DeviceCtlBlk *pos;
874 struct DeviceCtlBlk *dcb;
875 struct ScsiReqBlk *srb;
876 struct list_head *dcb_list_head = &acb->dcb_list;
877
878 if (acb->active_dcb
879 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
880 return;
881
882 if (timer_pending(&acb->waiting_timer))
883 del_timer(&acb->waiting_timer);
884
885 if (list_empty(dcb_list_head))
886 return;
887
888 /*
889 * Find the starting dcb. Need to find it again in the list
890 * since the list may have changed since we set the ptr to it
891 */
892 list_for_each_entry(dcb, dcb_list_head, list)
893 if (dcb == acb->dcb_run_robin) {
894 start = dcb;
895 break;
896 }
897 if (!start) {
898 /* This can happen! */
899 start = list_entry(dcb_list_head->next, typeof(*start), list);
900 acb->dcb_run_robin = start;
901 }
902
903
904 /*
905 * Loop over the dcb, but we start somewhere (potentially) in
906 * the middle of the loop so we need to manully do this.
907 */
908 pos = start;
909 do {
910 struct list_head *waiting_list_head = &pos->srb_waiting_list;
911
912 /* Make sure, the next another device gets scheduled ... */
913 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
914 acb->dcb_run_robin);
915
916 if (list_empty(waiting_list_head) ||
917 pos->max_command <= list_size(&pos->srb_going_list)) {
918 /* move to next dcb */
919 pos = dcb_get_next(dcb_list_head, pos);
920 } else {
921 srb = list_entry(waiting_list_head->next,
922 struct ScsiReqBlk, list);
923
924 /* Try to send to the bus */
925 if (!start_scsi(acb, pos, srb))
926 srb_waiting_to_going_move(pos, srb);
927 else
928 waiting_set_timer(acb, HZ/50);
929 break;
930 }
931 } while (pos != start);
932 }
933
934
935 /* Wake up waiting queue */
936 static void waiting_timeout(struct timer_list *t)
937 {
938 unsigned long flags;
939 struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);
940 dprintkdbg(DBG_1,
941 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
942 DC395x_LOCK_IO(acb->scsi_host, flags);
943 waiting_process_next(acb);
944 DC395x_UNLOCK_IO(acb->scsi_host, flags);
945 }
946
947
948 /* Get the DCB for a given ID/LUN combination */
949 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
950 {
951 return acb->children[id][lun];
952 }
953
954
955 /* Send SCSI Request Block (srb) to adapter (acb) */
956 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
957 {
958 struct DeviceCtlBlk *dcb = srb->dcb;
959
960 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
961 acb->active_dcb ||
962 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
963 srb_waiting_append(dcb, srb);
964 waiting_process_next(acb);
965 return;
966 }
967
968 if (!start_scsi(acb, dcb, srb))
969 srb_going_append(dcb, srb);
970 else {
971 srb_waiting_insert(dcb, srb);
972 waiting_set_timer(acb, HZ / 50);
973 }
974 }
975
976 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
977 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
978 struct ScsiReqBlk *srb)
979 {
980 int nseg;
981 enum dma_data_direction dir = cmd->sc_data_direction;
982 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
983 cmd, dcb->target_id, dcb->target_lun);
984
985 srb->dcb = dcb;
986 srb->cmd = cmd;
987 srb->sg_count = 0;
988 srb->total_xfer_length = 0;
989 srb->sg_bus_addr = 0;
990 srb->sg_index = 0;
991 srb->adapter_status = 0;
992 srb->target_status = 0;
993 srb->msg_count = 0;
994 srb->status = 0;
995 srb->flag = 0;
996 srb->state = 0;
997 srb->retry_count = 0;
998 srb->tag_number = TAG_NONE;
999 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1000 srb->end_message = 0;
1001
1002 nseg = scsi_dma_map(cmd);
1003 BUG_ON(nseg < 0);
1004
1005 if (dir == PCI_DMA_NONE || !nseg) {
1006 dprintkdbg(DBG_0,
1007 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1008 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
1009 srb->segment_x[0].address);
1010 } else {
1011 int i;
1012 u32 reqlen = scsi_bufflen(cmd);
1013 struct scatterlist *sg;
1014 struct SGentry *sgp = srb->segment_x;
1015
1016 srb->sg_count = nseg;
1017
1018 dprintkdbg(DBG_0,
1019 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1020 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
1021 srb->sg_count);
1022
1023 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
1024 u32 busaddr = (u32)sg_dma_address(sg);
1025 u32 seglen = (u32)sg->length;
1026 sgp[i].address = busaddr;
1027 sgp[i].length = seglen;
1028 srb->total_xfer_length += seglen;
1029 }
1030 sgp += srb->sg_count - 1;
1031
1032 /*
1033 * adjust last page if too big as it is allocated
1034 * on even page boundaries
1035 */
1036 if (srb->total_xfer_length > reqlen) {
1037 sgp->length -= (srb->total_xfer_length - reqlen);
1038 srb->total_xfer_length = reqlen;
1039 }
1040
1041 /* Fixup for WIDE padding - make sure length is even */
1042 if (dcb->sync_period & WIDE_SYNC &&
1043 srb->total_xfer_length % 2) {
1044 srb->total_xfer_length++;
1045 sgp->length++;
1046 }
1047
1048 srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1049 srb->segment_x,
1050 SEGMENTX_LEN,
1051 PCI_DMA_TODEVICE);
1052
1053 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1054 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1055 }
1056
1057 srb->request_length = srb->total_xfer_length;
1058 }
1059
1060
1061 /**
1062 * dc395x_queue_command - queue scsi command passed from the mid
1063 * layer, invoke 'done' on completion
1064 *
1065 * @cmd: pointer to scsi command object
1066 * @done: function pointer to be invoked on completion
1067 *
1068 * Returns 1 if the adapter (host) is busy, else returns 0. One
1069 * reason for an adapter to be busy is that the number
1070 * of outstanding queued commands is already equal to
1071 * struct Scsi_Host::can_queue .
1072 *
1073 * Required: if struct Scsi_Host::can_queue is ever non-zero
1074 * then this function is required.
1075 *
1076 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1077 * and is expected to be held on return.
1078 *
1079 **/
1080 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1081 {
1082 struct DeviceCtlBlk *dcb;
1083 struct ScsiReqBlk *srb;
1084 struct AdapterCtlBlk *acb =
1085 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1086 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
1087 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
1088
1089 /* Assume BAD_TARGET; will be cleared later */
1090 cmd->result = DID_BAD_TARGET << 16;
1091
1092 /* ignore invalid targets */
1093 if (cmd->device->id >= acb->scsi_host->max_id ||
1094 cmd->device->lun >= acb->scsi_host->max_lun ||
1095 cmd->device->lun >31) {
1096 goto complete;
1097 }
1098
1099 /* does the specified lun on the specified device exist */
1100 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1101 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1102 cmd->device->id, (u8)cmd->device->lun);
1103 goto complete;
1104 }
1105
1106 /* do we have a DCB for the device */
1107 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1108 if (!dcb) {
1109 /* should never happen */
1110 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1111 cmd->device->id, (u8)cmd->device->lun);
1112 goto complete;
1113 }
1114
1115 /* set callback and clear result in the command */
1116 cmd->scsi_done = done;
1117 cmd->result = 0;
1118
1119 srb = srb_get_free(acb);
1120 if (!srb)
1121 {
1122 /*
1123 * Return 1 since we are unable to queue this command at this
1124 * point in time.
1125 */
1126 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1127 return 1;
1128 }
1129
1130 build_srb(cmd, dcb, srb);
1131
1132 if (!list_empty(&dcb->srb_waiting_list)) {
1133 /* append to waiting queue */
1134 srb_waiting_append(dcb, srb);
1135 waiting_process_next(acb);
1136 } else {
1137 /* process immediately */
1138 send_srb(acb, srb);
1139 }
1140 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1141 return 0;
1142
1143 complete:
1144 /*
1145 * Complete the command immediatey, and then return 0 to
1146 * indicate that we have handled the command. This is usually
1147 * done when the commad is for things like non existent
1148 * devices.
1149 */
1150 done(cmd);
1151 return 0;
1152 }
1153
1154 static DEF_SCSI_QCMD(dc395x_queue_command)
1155
1156 /*
1157 * Return the disk geometry for the given SCSI device.
1158 */
1159 static int dc395x_bios_param(struct scsi_device *sdev,
1160 struct block_device *bdev, sector_t capacity, int *info)
1161 {
1162 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1163 int heads, sectors, cylinders;
1164 struct AdapterCtlBlk *acb;
1165 int size = capacity;
1166
1167 dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1168 acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1169 heads = 64;
1170 sectors = 32;
1171 cylinders = size / (heads * sectors);
1172
1173 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1174 heads = 255;
1175 sectors = 63;
1176 cylinders = size / (heads * sectors);
1177 }
1178 geom[0] = heads;
1179 geom[1] = sectors;
1180 geom[2] = cylinders;
1181 return 0;
1182 #else
1183 return scsicam_bios_param(bdev, capacity, info);
1184 #endif
1185 }
1186
1187
1188 static void dump_register_info(struct AdapterCtlBlk *acb,
1189 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1190 {
1191 u16 pstat;
1192 struct pci_dev *dev = acb->dev;
1193 pci_read_config_word(dev, PCI_STATUS, &pstat);
1194 if (!dcb)
1195 dcb = acb->active_dcb;
1196 if (!srb && dcb)
1197 srb = dcb->active_srb;
1198 if (srb) {
1199 if (!srb->cmd)
1200 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1201 srb, srb->cmd);
1202 else
1203 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1204 "cmnd=0x%02x <%02i-%i>\n",
1205 srb, srb->cmd,
1206 srb->cmd->cmnd[0], srb->cmd->device->id,
1207 (u8)srb->cmd->device->lun);
1208 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1209 srb->segment_x, srb->sg_count, srb->sg_index,
1210 srb->total_xfer_length);
1211 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1212 srb->state, srb->status, srb->scsi_phase,
1213 (acb->active_dcb) ? "" : "not");
1214 }
1215 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1216 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1217 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1218 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1219 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1220 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1221 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1222 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1223 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1224 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1225 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1226 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1227 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1228 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1229 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1230 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1231 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1232 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1233 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1234 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1235 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1236 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1237 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1238 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1239 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1240 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1241 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1242 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1243 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1244 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1245 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1246 "pci{status=0x%04x}\n",
1247 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1248 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1249 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1250 pstat);
1251 }
1252
1253
1254 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1255 {
1256 #if debug_enabled(DBG_FIFO)
1257 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1258 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1259 if (!(fifocnt & 0x40))
1260 dprintkdbg(DBG_FIFO,
1261 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1262 fifocnt & 0x3f, lines, txt);
1263 #endif
1264 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1265 }
1266
1267
1268 static void reset_dev_param(struct AdapterCtlBlk *acb)
1269 {
1270 struct DeviceCtlBlk *dcb;
1271 struct NvRamType *eeprom = &acb->eeprom;
1272 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1273
1274 list_for_each_entry(dcb, &acb->dcb_list, list) {
1275 u8 period_index;
1276
1277 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1278 dcb->sync_period = 0;
1279 dcb->sync_offset = 0;
1280
1281 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1282 period_index = eeprom->target[dcb->target_id].period & 0x07;
1283 dcb->min_nego_period = clock_period[period_index];
1284 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1285 || !(acb->config & HCC_WIDE_CARD))
1286 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1287 }
1288 }
1289
1290
1291 /*
1292 * perform a hard reset on the SCSI bus
1293 * @cmd - some command for this host (for fetching hooks)
1294 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1295 */
1296 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1297 {
1298 struct AdapterCtlBlk *acb =
1299 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1300 dprintkl(KERN_INFO,
1301 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1302 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1303
1304 if (timer_pending(&acb->waiting_timer))
1305 del_timer(&acb->waiting_timer);
1306
1307 /*
1308 * disable interrupt
1309 */
1310 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1311 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1312 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1313 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1314
1315 reset_scsi_bus(acb);
1316 udelay(500);
1317
1318 /* We may be in serious trouble. Wait some seconds */
1319 acb->last_reset =
1320 jiffies + 3 * HZ / 2 +
1321 HZ * acb->eeprom.delay_time;
1322
1323 /*
1324 * re-enable interrupt
1325 */
1326 /* Clear SCSI FIFO */
1327 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1328 clear_fifo(acb, "eh_bus_reset");
1329 /* Delete pending IRQ */
1330 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1331 set_basic_config(acb);
1332
1333 reset_dev_param(acb);
1334 doing_srb_done(acb, DID_RESET, cmd, 0);
1335 acb->active_dcb = NULL;
1336 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1337 waiting_process_next(acb);
1338
1339 return SUCCESS;
1340 }
1341
1342 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1343 {
1344 int rc;
1345
1346 spin_lock_irq(cmd->device->host->host_lock);
1347 rc = __dc395x_eh_bus_reset(cmd);
1348 spin_unlock_irq(cmd->device->host->host_lock);
1349
1350 return rc;
1351 }
1352
1353 /*
1354 * abort an errant SCSI command
1355 * @cmd - command to be aborted
1356 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1357 */
1358 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1359 {
1360 /*
1361 * Look into our command queues: If it has not been sent already,
1362 * we remove it and return success. Otherwise fail.
1363 */
1364 struct AdapterCtlBlk *acb =
1365 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1366 struct DeviceCtlBlk *dcb;
1367 struct ScsiReqBlk *srb;
1368 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1369 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1370
1371 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1372 if (!dcb) {
1373 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1374 return FAILED;
1375 }
1376
1377 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1378 if (srb) {
1379 srb_waiting_remove(dcb, srb);
1380 pci_unmap_srb_sense(acb, srb);
1381 pci_unmap_srb(acb, srb);
1382 free_tag(dcb, srb);
1383 srb_free_insert(acb, srb);
1384 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1385 cmd->result = DID_ABORT << 16;
1386 return SUCCESS;
1387 }
1388 srb = find_cmd(cmd, &dcb->srb_going_list);
1389 if (srb) {
1390 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1391 /* XXX: Should abort the command here */
1392 } else {
1393 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1394 }
1395 return FAILED;
1396 }
1397
1398
1399 /* SDTR */
1400 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1401 struct ScsiReqBlk *srb)
1402 {
1403 u8 *ptr = srb->msgout_buf + srb->msg_count;
1404 if (srb->msg_count > 1) {
1405 dprintkl(KERN_INFO,
1406 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1407 srb->msg_count, srb->msgout_buf[0],
1408 srb->msgout_buf[1]);
1409 return;
1410 }
1411 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1412 dcb->sync_offset = 0;
1413 dcb->min_nego_period = 200 >> 2;
1414 } else if (dcb->sync_offset == 0)
1415 dcb->sync_offset = SYNC_NEGO_OFFSET;
1416
1417 *ptr++ = MSG_EXTENDED; /* (01h) */
1418 *ptr++ = 3; /* length */
1419 *ptr++ = EXTENDED_SDTR; /* (01h) */
1420 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1421 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1422 srb->msg_count += 5;
1423 srb->state |= SRB_DO_SYNC_NEGO;
1424 }
1425
1426
1427 /* WDTR */
1428 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1429 struct ScsiReqBlk *srb)
1430 {
1431 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1432 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1433 u8 *ptr = srb->msgout_buf + srb->msg_count;
1434 if (srb->msg_count > 1) {
1435 dprintkl(KERN_INFO,
1436 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1437 srb->msg_count, srb->msgout_buf[0],
1438 srb->msgout_buf[1]);
1439 return;
1440 }
1441 *ptr++ = MSG_EXTENDED; /* (01h) */
1442 *ptr++ = 2; /* length */
1443 *ptr++ = EXTENDED_WDTR; /* (03h) */
1444 *ptr++ = wide;
1445 srb->msg_count += 4;
1446 srb->state |= SRB_DO_WIDE_NEGO;
1447 }
1448
1449
1450 #if 0
1451 /* Timer to work around chip flaw: When selecting and the bus is
1452 * busy, we sometimes miss a Selection timeout IRQ */
1453 void selection_timeout_missed(unsigned long ptr);
1454 /* Sets the timer to wake us up */
1455 static void selto_timer(struct AdapterCtlBlk *acb)
1456 {
1457 if (timer_pending(&acb->selto_timer))
1458 return;
1459 acb->selto_timer.function = selection_timeout_missed;
1460 acb->selto_timer.data = (unsigned long) acb;
1461 if (time_before
1462 (jiffies + HZ, acb->last_reset + HZ / 2))
1463 acb->selto_timer.expires =
1464 acb->last_reset + HZ / 2 + 1;
1465 else
1466 acb->selto_timer.expires = jiffies + HZ + 1;
1467 add_timer(&acb->selto_timer);
1468 }
1469
1470
1471 void selection_timeout_missed(unsigned long ptr)
1472 {
1473 unsigned long flags;
1474 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1475 struct ScsiReqBlk *srb;
1476 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1477 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1478 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1479 return;
1480 }
1481 DC395x_LOCK_IO(acb->scsi_host, flags);
1482 srb = acb->active_dcb->active_srb;
1483 disconnect(acb);
1484 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1485 }
1486 #endif
1487
1488
1489 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1490 struct ScsiReqBlk* srb)
1491 {
1492 u16 s_stat2, return_code;
1493 u8 s_stat, scsicommand, i, identify_message;
1494 u8 *ptr;
1495 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1496 dcb->target_id, dcb->target_lun, srb);
1497
1498 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1499
1500 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1501 s_stat2 = 0;
1502 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1503 #if 1
1504 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1505 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1506 s_stat, s_stat2);
1507 /*
1508 * Try anyway?
1509 *
1510 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1511 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1512 * (This is likely to be a bug in the hardware. Obviously, most people
1513 * only have one initiator per SCSI bus.)
1514 * Instead let this fail and have the timer make sure the command is
1515 * tried again after a short time
1516 */
1517 /*selto_timer (acb); */
1518 return 1;
1519 }
1520 #endif
1521 if (acb->active_dcb) {
1522 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1523 "command while another command (0x%p) is active.",
1524 srb->cmd,
1525 acb->active_dcb->active_srb ?
1526 acb->active_dcb->active_srb->cmd : 0);
1527 return 1;
1528 }
1529 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1530 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1531 return 1;
1532 }
1533 /* Allow starting of SCSI commands half a second before we allow the mid-level
1534 * to queue them again after a reset */
1535 if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1536 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1537 return 1;
1538 }
1539
1540 /* Flush FIFO */
1541 clear_fifo(acb, "start_scsi");
1542 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1543 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1544 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1545 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1546 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1547
1548 identify_message = dcb->identify_msg;
1549 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1550 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1551 if (srb->flag & AUTO_REQSENSE)
1552 identify_message &= 0xBF;
1553
1554 if (((srb->cmd->cmnd[0] == INQUIRY)
1555 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1556 || (srb->flag & AUTO_REQSENSE))
1557 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1558 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1559 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1560 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1561 && (dcb->target_lun == 0)) {
1562 srb->msgout_buf[0] = identify_message;
1563 srb->msg_count = 1;
1564 scsicommand = SCMD_SEL_ATNSTOP;
1565 srb->state = SRB_MSGOUT;
1566 #ifndef SYNC_FIRST
1567 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1568 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1569 build_wdtr(acb, dcb, srb);
1570 goto no_cmd;
1571 }
1572 #endif
1573 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1574 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1575 build_sdtr(acb, dcb, srb);
1576 goto no_cmd;
1577 }
1578 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1579 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1580 build_wdtr(acb, dcb, srb);
1581 goto no_cmd;
1582 }
1583 srb->msg_count = 0;
1584 }
1585 /* Send identify message */
1586 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1587
1588 scsicommand = SCMD_SEL_ATN;
1589 srb->state = SRB_START_;
1590 #ifndef DC395x_NO_TAGQ
1591 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1592 && (identify_message & 0xC0)) {
1593 /* Send Tag message */
1594 u32 tag_mask = 1;
1595 u8 tag_number = 0;
1596 while (tag_mask & dcb->tag_mask
1597 && tag_number < dcb->max_command) {
1598 tag_mask = tag_mask << 1;
1599 tag_number++;
1600 }
1601 if (tag_number >= dcb->max_command) {
1602 dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1603 "Out of tags target=<%02i-%i>)\n",
1604 srb->cmd, srb->cmd->device->id,
1605 (u8)srb->cmd->device->lun);
1606 srb->state = SRB_READY;
1607 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1608 DO_HWRESELECT);
1609 return 1;
1610 }
1611 /* Send Tag id */
1612 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1613 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1614 dcb->tag_mask |= tag_mask;
1615 srb->tag_number = tag_number;
1616 scsicommand = SCMD_SEL_ATN3;
1617 srb->state = SRB_START_;
1618 }
1619 #endif
1620 /*polling:*/
1621 /* Send CDB ..command block ......... */
1622 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1623 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1624 srb->cmd->cmnd[0], srb->tag_number);
1625 if (srb->flag & AUTO_REQSENSE) {
1626 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1627 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1628 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1629 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1630 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1631 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1632 } else {
1633 ptr = (u8 *)srb->cmd->cmnd;
1634 for (i = 0; i < srb->cmd->cmd_len; i++)
1635 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1636 }
1637 no_cmd:
1638 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1639 DO_HWRESELECT | DO_DATALATCH);
1640 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1641 /*
1642 * If start_scsi return 1:
1643 * we caught an interrupt (must be reset or reselection ... )
1644 * : Let's process it first!
1645 */
1646 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1647 srb->cmd, dcb->target_id, dcb->target_lun);
1648 srb->state = SRB_READY;
1649 free_tag(dcb, srb);
1650 srb->msg_count = 0;
1651 return_code = 1;
1652 /* This IRQ should NOT get lost, as we did not acknowledge it */
1653 } else {
1654 /*
1655 * If start_scsi returns 0:
1656 * we know that the SCSI processor is free
1657 */
1658 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1659 dcb->active_srb = srb;
1660 acb->active_dcb = dcb;
1661 return_code = 0;
1662 /* it's important for atn stop */
1663 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1664 DO_DATALATCH | DO_HWRESELECT);
1665 /* SCSI command */
1666 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1667 }
1668 return return_code;
1669 }
1670
1671
1672 #define DC395x_ENABLE_MSGOUT \
1673 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1674 srb->state |= SRB_MSGOUT
1675
1676
1677 /* abort command */
1678 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1679 struct ScsiReqBlk *srb)
1680 {
1681 srb->msgout_buf[0] = ABORT;
1682 srb->msg_count = 1;
1683 DC395x_ENABLE_MSGOUT;
1684 srb->state &= ~SRB_MSGIN;
1685 srb->state |= SRB_MSGOUT;
1686 }
1687
1688
1689 /**
1690 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1691 * have been triggered for this card.
1692 *
1693 * @acb: a pointer to the adpter control block
1694 * @scsi_status: the status return when we checked the card
1695 **/
1696 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1697 u16 scsi_status)
1698 {
1699 struct DeviceCtlBlk *dcb;
1700 struct ScsiReqBlk *srb;
1701 u16 phase;
1702 u8 scsi_intstatus;
1703 unsigned long flags;
1704 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1705 u16 *);
1706
1707 DC395x_LOCK_IO(acb->scsi_host, flags);
1708
1709 /* This acknowledges the IRQ */
1710 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1711 if ((scsi_status & 0x2007) == 0x2002)
1712 dprintkl(KERN_DEBUG,
1713 "COP after COP completed? %04x\n", scsi_status);
1714 if (debug_enabled(DBG_KG)) {
1715 if (scsi_intstatus & INT_SELTIMEOUT)
1716 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1717 }
1718 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1719
1720 if (timer_pending(&acb->selto_timer))
1721 del_timer(&acb->selto_timer);
1722
1723 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1724 disconnect(acb); /* bus free interrupt */
1725 goto out_unlock;
1726 }
1727 if (scsi_intstatus & INT_RESELECTED) {
1728 reselect(acb);
1729 goto out_unlock;
1730 }
1731 if (scsi_intstatus & INT_SELECT) {
1732 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1733 goto out_unlock;
1734 }
1735 if (scsi_intstatus & INT_SCSIRESET) {
1736 scsi_reset_detect(acb);
1737 goto out_unlock;
1738 }
1739 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1740 dcb = acb->active_dcb;
1741 if (!dcb) {
1742 dprintkl(KERN_DEBUG,
1743 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1744 scsi_status, scsi_intstatus);
1745 goto out_unlock;
1746 }
1747 srb = dcb->active_srb;
1748 if (dcb->flag & ABORT_DEV_) {
1749 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1750 enable_msgout_abort(acb, srb);
1751 }
1752
1753 /* software sequential machine */
1754 phase = (u16)srb->scsi_phase;
1755
1756 /*
1757 * 62037 or 62137
1758 * call dc395x_scsi_phase0[]... "phase entry"
1759 * handle every phase before start transfer
1760 */
1761 /* data_out_phase0, phase:0 */
1762 /* data_in_phase0, phase:1 */
1763 /* command_phase0, phase:2 */
1764 /* status_phase0, phase:3 */
1765 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1766 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1767 /* msgout_phase0, phase:6 */
1768 /* msgin_phase0, phase:7 */
1769 dc395x_statev = dc395x_scsi_phase0[phase];
1770 dc395x_statev(acb, srb, &scsi_status);
1771
1772 /*
1773 * if there were any exception occurred scsi_status
1774 * will be modify to bus free phase new scsi_status
1775 * transfer out from ... previous dc395x_statev
1776 */
1777 srb->scsi_phase = scsi_status & PHASEMASK;
1778 phase = (u16)scsi_status & PHASEMASK;
1779
1780 /*
1781 * call dc395x_scsi_phase1[]... "phase entry" handle
1782 * every phase to do transfer
1783 */
1784 /* data_out_phase1, phase:0 */
1785 /* data_in_phase1, phase:1 */
1786 /* command_phase1, phase:2 */
1787 /* status_phase1, phase:3 */
1788 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1789 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1790 /* msgout_phase1, phase:6 */
1791 /* msgin_phase1, phase:7 */
1792 dc395x_statev = dc395x_scsi_phase1[phase];
1793 dc395x_statev(acb, srb, &scsi_status);
1794 }
1795 out_unlock:
1796 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1797 }
1798
1799
1800 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1801 {
1802 struct AdapterCtlBlk *acb = dev_id;
1803 u16 scsi_status;
1804 u8 dma_status;
1805 irqreturn_t handled = IRQ_NONE;
1806
1807 /*
1808 * Check for pending interrupt
1809 */
1810 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1811 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1812 if (scsi_status & SCSIINTERRUPT) {
1813 /* interrupt pending - let's process it! */
1814 dc395x_handle_interrupt(acb, scsi_status);
1815 handled = IRQ_HANDLED;
1816 }
1817 else if (dma_status & 0x20) {
1818 /* Error from the DMA engine */
1819 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1820 #if 0
1821 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1822 if (acb->active_dcb) {
1823 acb->active_dcb-> flag |= ABORT_DEV_;
1824 if (acb->active_dcb->active_srb)
1825 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1826 }
1827 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1828 #else
1829 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1830 acb = NULL;
1831 #endif
1832 handled = IRQ_HANDLED;
1833 }
1834
1835 return handled;
1836 }
1837
1838
1839 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1840 u16 *pscsi_status)
1841 {
1842 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1843 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1844 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1845
1846 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1847 srb->state &= ~SRB_MSGOUT;
1848 }
1849
1850
1851 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1852 u16 *pscsi_status)
1853 {
1854 u16 i;
1855 u8 *ptr;
1856 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1857
1858 clear_fifo(acb, "msgout_phase1");
1859 if (!(srb->state & SRB_MSGOUT)) {
1860 srb->state |= SRB_MSGOUT;
1861 dprintkl(KERN_DEBUG,
1862 "msgout_phase1: (0x%p) Phase unexpected\n",
1863 srb->cmd); /* So what ? */
1864 }
1865 if (!srb->msg_count) {
1866 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1867 srb->cmd);
1868 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1869 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1870 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1871 return;
1872 }
1873 ptr = (u8 *)srb->msgout_buf;
1874 for (i = 0; i < srb->msg_count; i++)
1875 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1876 srb->msg_count = 0;
1877 if (srb->msgout_buf[0] == MSG_ABORT)
1878 srb->state = SRB_ABORT_SENT;
1879
1880 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1881 }
1882
1883
1884 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1885 u16 *pscsi_status)
1886 {
1887 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1888 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1889 }
1890
1891
1892 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1893 u16 *pscsi_status)
1894 {
1895 struct DeviceCtlBlk *dcb;
1896 u8 *ptr;
1897 u16 i;
1898 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1899
1900 clear_fifo(acb, "command_phase1");
1901 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1902 if (!(srb->flag & AUTO_REQSENSE)) {
1903 ptr = (u8 *)srb->cmd->cmnd;
1904 for (i = 0; i < srb->cmd->cmd_len; i++) {
1905 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1906 ptr++;
1907 }
1908 } else {
1909 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1910 dcb = acb->active_dcb;
1911 /* target id */
1912 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1913 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1914 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1915 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1916 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1917 }
1918 srb->state |= SRB_COMMAND;
1919 /* it's important for atn stop */
1920 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1921 /* SCSI command */
1922 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1923 }
1924
1925
1926 /*
1927 * Verify that the remaining space in the hw sg lists is the same as
1928 * the count of remaining bytes in srb->total_xfer_length
1929 */
1930 static void sg_verify_length(struct ScsiReqBlk *srb)
1931 {
1932 if (debug_enabled(DBG_SG)) {
1933 unsigned len = 0;
1934 unsigned idx = srb->sg_index;
1935 struct SGentry *psge = srb->segment_x + idx;
1936 for (; idx < srb->sg_count; psge++, idx++)
1937 len += psge->length;
1938 if (len != srb->total_xfer_length)
1939 dprintkdbg(DBG_SG,
1940 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1941 srb->total_xfer_length, len);
1942 }
1943 }
1944
1945
1946 /*
1947 * Compute the next Scatter Gather list index and adjust its length
1948 * and address if necessary
1949 */
1950 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1951 {
1952 u8 idx;
1953 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1954 struct SGentry *psge = srb->segment_x + srb->sg_index;
1955
1956 dprintkdbg(DBG_0,
1957 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1958 xferred, srb->total_xfer_length, left);
1959 if (xferred == 0) {
1960 /* nothing to update since we did not transfer any data */
1961 return;
1962 }
1963
1964 sg_verify_length(srb);
1965 srb->total_xfer_length = left; /* update remaining count */
1966 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1967 if (xferred >= psge->length) {
1968 /* Complete SG entries done */
1969 xferred -= psge->length;
1970 } else {
1971 /* Partial SG entry done */
1972 pci_dma_sync_single_for_cpu(srb->dcb->
1973 acb->dev,
1974 srb->sg_bus_addr,
1975 SEGMENTX_LEN,
1976 PCI_DMA_TODEVICE);
1977 psge->length -= xferred;
1978 psge->address += xferred;
1979 srb->sg_index = idx;
1980 pci_dma_sync_single_for_device(srb->dcb->
1981 acb->dev,
1982 srb->sg_bus_addr,
1983 SEGMENTX_LEN,
1984 PCI_DMA_TODEVICE);
1985 break;
1986 }
1987 psge++;
1988 }
1989 sg_verify_length(srb);
1990 }
1991
1992
1993 /*
1994 * We have transferred a single byte (PIO mode?) and need to update
1995 * the count of bytes remaining (total_xfer_length) and update the sg
1996 * entry to either point to next byte in the current sg entry, or of
1997 * already at the end to point to the start of the next sg entry
1998 */
1999 static void sg_subtract_one(struct ScsiReqBlk *srb)
2000 {
2001 sg_update_list(srb, srb->total_xfer_length - 1);
2002 }
2003
2004
2005 /*
2006 * cleanup_after_transfer
2007 *
2008 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2009 * KG: Currently called from StatusPhase1 ()
2010 * Should probably also be called from other places
2011 * Best might be to call it in DataXXPhase0, if new phase will differ
2012 */
2013 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2014 struct ScsiReqBlk *srb)
2015 {
2016 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2017 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2018 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2019 clear_fifo(acb, "cleanup/in");
2020 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2021 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2022 } else { /* write */
2023 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2024 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2025 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2026 clear_fifo(acb, "cleanup/out");
2027 }
2028 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2029 }
2030
2031
2032 /*
2033 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
2034 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2035 */
2036 #define DC395x_LASTPIO 4
2037
2038
2039 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2040 u16 *pscsi_status)
2041 {
2042 struct DeviceCtlBlk *dcb = srb->dcb;
2043 u16 scsi_status = *pscsi_status;
2044 u32 d_left_counter = 0;
2045 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
2046 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2047
2048 /*
2049 * KG: We need to drain the buffers before we draw any conclusions!
2050 * This means telling the DMA to push the rest into SCSI, telling
2051 * SCSI to push the rest to the bus.
2052 * However, the device might have been the one to stop us (phase
2053 * change), and the data in transit just needs to be accounted so
2054 * it can be retransmitted.)
2055 */
2056 /*
2057 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2058 * If we need more data, the DMA SG list will be freshly set up, anyway
2059 */
2060 dprintkdbg(DBG_PIO, "data_out_phase0: "
2061 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2062 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2063 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2064 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2065 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2066 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2067 srb->total_xfer_length);
2068 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2069
2070 if (!(srb->state & SRB_XFERPAD)) {
2071 if (scsi_status & PARITYERROR)
2072 srb->status |= PARITY_ERROR;
2073
2074 /*
2075 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2076 * is the no of bytes it got from the DMA engine not the no it
2077 * transferred successfully to the device. (And the difference could
2078 * be as much as the FIFO size, I guess ...)
2079 */
2080 if (!(scsi_status & SCSIXFERDONE)) {
2081 /*
2082 * when data transfer from DMA FIFO to SCSI FIFO
2083 * if there was some data left in SCSI FIFO
2084 */
2085 d_left_counter =
2086 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2087 0x1F);
2088 if (dcb->sync_period & WIDE_SYNC)
2089 d_left_counter <<= 1;
2090
2091 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2092 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2093 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2094 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2095 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2096 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2097 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2098 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2099 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2100 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2101 }
2102 /*
2103 * calculate all the residue data that not yet tranfered
2104 * SCSI transfer counter + left in SCSI FIFO data
2105 *
2106 * .....TRM_S1040_SCSI_COUNTER (24bits)
2107 * The counter always decrement by one for every SCSI byte transfer.
2108 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2109 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2110 */
2111 if (srb->total_xfer_length > DC395x_LASTPIO)
2112 d_left_counter +=
2113 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2114
2115 /* Is this a good idea? */
2116 /*clear_fifo(acb, "DOP1"); */
2117 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2118 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2119 && scsi_bufflen(srb->cmd) % 2) {
2120 d_left_counter = 0;
2121 dprintkl(KERN_INFO,
2122 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2123 scsi_status);
2124 }
2125 /*
2126 * KG: Oops again. Same thinko as above: The SCSI might have been
2127 * faster than the DMA engine, so that it ran out of data.
2128 * In that case, we have to do just nothing!
2129 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2130 */
2131 /*
2132 * KG: This is nonsense: We have been WRITING data to the bus
2133 * If the SCSI engine has no bytes left, how should the DMA engine?
2134 */
2135 if (d_left_counter == 0) {
2136 srb->total_xfer_length = 0;
2137 } else {
2138 /*
2139 * if transfer not yet complete
2140 * there were some data residue in SCSI FIFO or
2141 * SCSI transfer counter not empty
2142 */
2143 long oldxferred =
2144 srb->total_xfer_length - d_left_counter;
2145 const int diff =
2146 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2147 sg_update_list(srb, d_left_counter);
2148 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2149 if ((srb->segment_x[srb->sg_index].length ==
2150 diff && scsi_sg_count(srb->cmd))
2151 || ((oldxferred & ~PAGE_MASK) ==
2152 (PAGE_SIZE - diff))
2153 ) {
2154 dprintkl(KERN_INFO, "data_out_phase0: "
2155 "Work around chip bug (%i)?\n", diff);
2156 d_left_counter =
2157 srb->total_xfer_length - diff;
2158 sg_update_list(srb, d_left_counter);
2159 /*srb->total_xfer_length -= diff; */
2160 /*srb->virt_addr += diff; */
2161 /*if (srb->cmd->use_sg) */
2162 /* srb->sg_index++; */
2163 }
2164 }
2165 }
2166 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2167 cleanup_after_transfer(acb, srb);
2168 }
2169 }
2170
2171
2172 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2173 u16 *pscsi_status)
2174 {
2175 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2176 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2177 clear_fifo(acb, "data_out_phase1");
2178 /* do prepare before transfer when data out phase */
2179 data_io_transfer(acb, srb, XFERDATAOUT);
2180 }
2181
2182 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2183 u16 *pscsi_status)
2184 {
2185 u16 scsi_status = *pscsi_status;
2186
2187 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2188 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2189
2190 /*
2191 * KG: DataIn is much more tricky than DataOut. When the device is finished
2192 * and switches to another phase, the SCSI engine should be finished too.
2193 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2194 * engine and transferred to memory.
2195 * We should wait for the FIFOs to be emptied by that (is there any way to
2196 * enforce this?) and then stop the DMA engine, because it might think, that
2197 * there are more bytes to follow. Yes, the device might disconnect prior to
2198 * having all bytes transferred!
2199 * Also we should make sure that all data from the DMA engine buffer's really
2200 * made its way to the system memory! Some documentation on this would not
2201 * seem to be a bad idea, actually.
2202 */
2203 if (!(srb->state & SRB_XFERPAD)) {
2204 u32 d_left_counter;
2205 unsigned int sc, fc;
2206
2207 if (scsi_status & PARITYERROR) {
2208 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2209 "Parity Error\n", srb->cmd);
2210 srb->status |= PARITY_ERROR;
2211 }
2212 /*
2213 * KG: We should wait for the DMA FIFO to be empty ...
2214 * but: it would be better to wait first for the SCSI FIFO and then the
2215 * the DMA FIFO to become empty? How do we know, that the device not already
2216 * sent data to the FIFO in a MsgIn phase, eg.?
2217 */
2218 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2219 #if 0
2220 int ctr = 6000000;
2221 dprintkl(KERN_DEBUG,
2222 "DIP0: Wait for DMA FIFO to flush ...\n");
2223 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2224 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2225 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2226 while (!
2227 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2228 0x80) && --ctr);
2229 if (ctr < 6000000 - 1)
2230 dprintkl(KERN_DEBUG
2231 "DIP0: Had to wait for DMA ...\n");
2232 if (!ctr)
2233 dprintkl(KERN_ERR,
2234 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2235 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2236 #endif
2237 dprintkdbg(DBG_KG, "data_in_phase0: "
2238 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2239 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2240 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2241 }
2242 /* Now: Check remainig data: The SCSI counters should tell us ... */
2243 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2244 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2245 d_left_counter = sc + ((fc & 0x1f)
2246 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2247 0));
2248 dprintkdbg(DBG_KG, "data_in_phase0: "
2249 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2250 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2251 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2252 fc,
2253 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2254 sc,
2255 fc,
2256 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2257 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2258 srb->total_xfer_length, d_left_counter);
2259 #if DC395x_LASTPIO
2260 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2261 if (d_left_counter
2262 && srb->total_xfer_length <= DC395x_LASTPIO) {
2263 size_t left_io = srb->total_xfer_length;
2264
2265 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2266 /*sg_update_list (srb, d_left_counter); */
2267 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2268 "for remaining %i bytes:",
2269 fc & 0x1f,
2270 (srb->dcb->sync_period & WIDE_SYNC) ?
2271 "words" : "bytes",
2272 srb->total_xfer_length);
2273 if (srb->dcb->sync_period & WIDE_SYNC)
2274 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2275 CFG2_WIDEFIFO);
2276 while (left_io) {
2277 unsigned char *virt, *base = NULL;
2278 unsigned long flags = 0;
2279 size_t len = left_io;
2280 size_t offset = srb->request_length - left_io;
2281
2282 local_irq_save(flags);
2283 /* Assumption: it's inside one page as it's at most 4 bytes and
2284 I just assume it's on a 4-byte boundary */
2285 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2286 srb->sg_count, &offset, &len);
2287 virt = base + offset;
2288
2289 left_io -= len;
2290
2291 while (len) {
2292 u8 byte;
2293 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2294 *virt++ = byte;
2295
2296 if (debug_enabled(DBG_PIO))
2297 printk(" %02x", byte);
2298
2299 d_left_counter--;
2300 sg_subtract_one(srb);
2301
2302 len--;
2303
2304 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2305
2306 if (fc == 0x40) {
2307 left_io = 0;
2308 break;
2309 }
2310 }
2311
2312 WARN_ON((fc != 0x40) == !d_left_counter);
2313
2314 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2315 /* Read the last byte ... */
2316 if (srb->total_xfer_length > 0) {
2317 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2318
2319 *virt++ = byte;
2320 srb->total_xfer_length--;
2321 if (debug_enabled(DBG_PIO))
2322 printk(" %02x", byte);
2323 }
2324
2325 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2326 }
2327
2328 scsi_kunmap_atomic_sg(base);
2329 local_irq_restore(flags);
2330 }
2331 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2332 /*srb->total_xfer_length = 0; */
2333 if (debug_enabled(DBG_PIO))
2334 printk("\n");
2335 }
2336 #endif /* DC395x_LASTPIO */
2337
2338 #if 0
2339 /*
2340 * KG: This was in DATAOUT. Does it also belong here?
2341 * Nobody seems to know what counter and fifo_cnt count exactly ...
2342 */
2343 if (!(scsi_status & SCSIXFERDONE)) {
2344 /*
2345 * when data transfer from DMA FIFO to SCSI FIFO
2346 * if there was some data left in SCSI FIFO
2347 */
2348 d_left_counter =
2349 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2350 0x1F);
2351 if (srb->dcb->sync_period & WIDE_SYNC)
2352 d_left_counter <<= 1;
2353 /*
2354 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2355 * so need to *= 2
2356 * KG: Seems to be correct ...
2357 */
2358 }
2359 #endif
2360 /* KG: This should not be needed any more! */
2361 if (d_left_counter == 0
2362 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2363 #if 0
2364 int ctr = 6000000;
2365 u8 TempDMAstatus;
2366 do {
2367 TempDMAstatus =
2368 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2369 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2370 if (!ctr)
2371 dprintkl(KERN_ERR,
2372 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2373 srb->total_xfer_length = 0;
2374 #endif
2375 srb->total_xfer_length = d_left_counter;
2376 } else { /* phase changed */
2377 /*
2378 * parsing the case:
2379 * when a transfer not yet complete
2380 * but be disconnected by target
2381 * if transfer not yet complete
2382 * there were some data residue in SCSI FIFO or
2383 * SCSI transfer counter not empty
2384 */
2385 sg_update_list(srb, d_left_counter);
2386 }
2387 }
2388 /* KG: The target may decide to disconnect: Empty FIFO before! */
2389 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2390 cleanup_after_transfer(acb, srb);
2391 }
2392 }
2393
2394
2395 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2396 u16 *pscsi_status)
2397 {
2398 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2399 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2400 data_io_transfer(acb, srb, XFERDATAIN);
2401 }
2402
2403
2404 static void data_io_transfer(struct AdapterCtlBlk *acb,
2405 struct ScsiReqBlk *srb, u16 io_dir)
2406 {
2407 struct DeviceCtlBlk *dcb = srb->dcb;
2408 u8 bval;
2409 dprintkdbg(DBG_0,
2410 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2411 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2412 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2413 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2414 if (srb == acb->tmp_srb)
2415 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2416 if (srb->sg_index >= srb->sg_count) {
2417 /* can't happen? out of bounds error */
2418 return;
2419 }
2420
2421 if (srb->total_xfer_length > DC395x_LASTPIO) {
2422 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2423 /*
2424 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2425 * Maybe, even ABORTXFER would be appropriate
2426 */
2427 if (dma_status & XFERPENDING) {
2428 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2429 "Expect trouble!\n");
2430 dump_register_info(acb, dcb, srb);
2431 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2432 }
2433 /* clear_fifo(acb, "IO"); */
2434 /*
2435 * load what physical address of Scatter/Gather list table
2436 * want to be transfer
2437 */
2438 srb->state |= SRB_DATA_XFER;
2439 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2440 if (scsi_sg_count(srb->cmd)) { /* with S/G */
2441 io_dir |= DMACMD_SG;
2442 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2443 srb->sg_bus_addr +
2444 sizeof(struct SGentry) *
2445 srb->sg_index);
2446 /* load how many bytes in the sg list table */
2447 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2448 ((u32)(srb->sg_count -
2449 srb->sg_index) << 3));
2450 } else { /* without S/G */
2451 io_dir &= ~DMACMD_SG;
2452 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2453 srb->segment_x[0].address);
2454 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2455 srb->segment_x[0].length);
2456 }
2457 /* load total transfer length (24bits) max value 16Mbyte */
2458 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2459 srb->total_xfer_length);
2460 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2461 if (io_dir & DMACMD_DIR) { /* read */
2462 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2463 SCMD_DMA_IN);
2464 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2465 } else {
2466 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2467 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2468 SCMD_DMA_OUT);
2469 }
2470
2471 }
2472 #if DC395x_LASTPIO
2473 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2474 /*
2475 * load what physical address of Scatter/Gather list table
2476 * want to be transfer
2477 */
2478 srb->state |= SRB_DATA_XFER;
2479 /* load total transfer length (24bits) max value 16Mbyte */
2480 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2481 srb->total_xfer_length);
2482 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2483 if (io_dir & DMACMD_DIR) { /* read */
2484 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2485 SCMD_FIFO_IN);
2486 } else { /* write */
2487 int ln = srb->total_xfer_length;
2488 size_t left_io = srb->total_xfer_length;
2489
2490 if (srb->dcb->sync_period & WIDE_SYNC)
2491 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2492 CFG2_WIDEFIFO);
2493
2494 while (left_io) {
2495 unsigned char *virt, *base = NULL;
2496 unsigned long flags = 0;
2497 size_t len = left_io;
2498 size_t offset = srb->request_length - left_io;
2499
2500 local_irq_save(flags);
2501 /* Again, max 4 bytes */
2502 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2503 srb->sg_count, &offset, &len);
2504 virt = base + offset;
2505
2506 left_io -= len;
2507
2508 while (len--) {
2509 if (debug_enabled(DBG_PIO))
2510 printk(" %02x", *virt);
2511
2512 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2513
2514 sg_subtract_one(srb);
2515 }
2516
2517 scsi_kunmap_atomic_sg(base);
2518 local_irq_restore(flags);
2519 }
2520 if (srb->dcb->sync_period & WIDE_SYNC) {
2521 if (ln % 2) {
2522 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2523 if (debug_enabled(DBG_PIO))
2524 printk(" |00");
2525 }
2526 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2527 }
2528 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2529 if (debug_enabled(DBG_PIO))
2530 printk("\n");
2531 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2532 SCMD_FIFO_OUT);
2533 }
2534 }
2535 #endif /* DC395x_LASTPIO */
2536 else { /* xfer pad */
2537 u8 data = 0, data2 = 0;
2538 if (srb->sg_count) {
2539 srb->adapter_status = H_OVER_UNDER_RUN;
2540 srb->status |= OVER_RUN;
2541 }
2542 /*
2543 * KG: despite the fact that we are using 16 bits I/O ops
2544 * the SCSI FIFO is only 8 bits according to the docs
2545 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2546 */
2547 if (dcb->sync_period & WIDE_SYNC) {
2548 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2549 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2550 CFG2_WIDEFIFO);
2551 if (io_dir & DMACMD_DIR) {
2552 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2553 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2554 } else {
2555 /* Danger, Robinson: If you find KGs
2556 * scattered over the wide disk, the driver
2557 * or chip is to blame :-( */
2558 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2559 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2560 }
2561 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2562 } else {
2563 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2564 /* Danger, Robinson: If you find a collection of Ks on your disk
2565 * something broke :-( */
2566 if (io_dir & DMACMD_DIR)
2567 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2568 else
2569 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2570 }
2571 srb->state |= SRB_XFERPAD;
2572 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2573 /* SCSI command */
2574 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2575 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2576 }
2577 }
2578
2579
2580 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2581 u16 *pscsi_status)
2582 {
2583 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2584 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2585 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2586 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2587 srb->state = SRB_COMPLETED;
2588 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2589 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2590 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2591 }
2592
2593
2594 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2595 u16 *pscsi_status)
2596 {
2597 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2598 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2599 srb->state = SRB_STATUS;
2600 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2601 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2602 }
2603
2604
2605 /* Check if the message is complete */
2606 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2607 {
2608 if (*msgbuf == EXTENDED_MESSAGE) {
2609 if (len < 2)
2610 return 0;
2611 if (len < msgbuf[1] + 2)
2612 return 0;
2613 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2614 if (len < 2)
2615 return 0;
2616 return 1;
2617 }
2618
2619 /* reject_msg */
2620 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2621 struct ScsiReqBlk *srb)
2622 {
2623 srb->msgout_buf[0] = MESSAGE_REJECT;
2624 srb->msg_count = 1;
2625 DC395x_ENABLE_MSGOUT;
2626 srb->state &= ~SRB_MSGIN;
2627 srb->state |= SRB_MSGOUT;
2628 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2629 srb->msgin_buf[0],
2630 srb->dcb->target_id, srb->dcb->target_lun);
2631 }
2632
2633
2634 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2635 struct DeviceCtlBlk *dcb, u8 tag)
2636 {
2637 struct ScsiReqBlk *srb = NULL;
2638 struct ScsiReqBlk *i;
2639 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2640 srb->cmd, tag, srb);
2641
2642 if (!(dcb->tag_mask & (1 << tag)))
2643 dprintkl(KERN_DEBUG,
2644 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2645 dcb->tag_mask, tag);
2646
2647 if (list_empty(&dcb->srb_going_list))
2648 goto mingx0;
2649 list_for_each_entry(i, &dcb->srb_going_list, list) {
2650 if (i->tag_number == tag) {
2651 srb = i;
2652 break;
2653 }
2654 }
2655 if (!srb)
2656 goto mingx0;
2657
2658 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2659 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2660 if (dcb->flag & ABORT_DEV_) {
2661 /*srb->state = SRB_ABORT_SENT; */
2662 enable_msgout_abort(acb, srb);
2663 }
2664
2665 if (!(srb->state & SRB_DISCONNECT))
2666 goto mingx0;
2667
2668 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2669 srb->state |= dcb->active_srb->state;
2670 srb->state |= SRB_DATA_XFER;
2671 dcb->active_srb = srb;
2672 /* How can we make the DORS happy? */
2673 return srb;
2674
2675 mingx0:
2676 srb = acb->tmp_srb;
2677 srb->state = SRB_UNEXPECT_RESEL;
2678 dcb->active_srb = srb;
2679 srb->msgout_buf[0] = MSG_ABORT_TAG;
2680 srb->msg_count = 1;
2681 DC395x_ENABLE_MSGOUT;
2682 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2683 return srb;
2684 }
2685
2686
2687 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2688 struct DeviceCtlBlk *dcb)
2689 {
2690 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2691 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2692 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2693 set_xfer_rate(acb, dcb);
2694 }
2695
2696
2697 /* set async transfer mode */
2698 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2699 {
2700 struct DeviceCtlBlk *dcb = srb->dcb;
2701 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2702 dcb->target_id, dcb->target_lun);
2703
2704 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2705 dcb->sync_mode |= SYNC_NEGO_DONE;
2706 /*dcb->sync_period &= 0; */
2707 dcb->sync_offset = 0;
2708 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2709 srb->state &= ~SRB_DO_SYNC_NEGO;
2710 reprogram_regs(acb, dcb);
2711 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2712 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2713 build_wdtr(acb, dcb, srb);
2714 DC395x_ENABLE_MSGOUT;
2715 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2716 }
2717 }
2718
2719
2720 /* set sync transfer mode */
2721 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2722 {
2723 struct DeviceCtlBlk *dcb = srb->dcb;
2724 u8 bval;
2725 int fact;
2726 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2727 "(%02i.%01i MHz) Offset %i\n",
2728 dcb->target_id, srb->msgin_buf[3] << 2,
2729 (250 / srb->msgin_buf[3]),
2730 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2731 srb->msgin_buf[4]);
2732
2733 if (srb->msgin_buf[4] > 15)
2734 srb->msgin_buf[4] = 15;
2735 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2736 dcb->sync_offset = 0;
2737 else if (dcb->sync_offset == 0)
2738 dcb->sync_offset = srb->msgin_buf[4];
2739 if (srb->msgin_buf[4] > dcb->sync_offset)
2740 srb->msgin_buf[4] = dcb->sync_offset;
2741 else
2742 dcb->sync_offset = srb->msgin_buf[4];
2743 bval = 0;
2744 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2745 || dcb->min_nego_period >
2746 clock_period[bval]))
2747 bval++;
2748 if (srb->msgin_buf[3] < clock_period[bval])
2749 dprintkl(KERN_INFO,
2750 "msgin_set_sync: Increase sync nego period to %ins\n",
2751 clock_period[bval] << 2);
2752 srb->msgin_buf[3] = clock_period[bval];
2753 dcb->sync_period &= 0xf0;
2754 dcb->sync_period |= ALT_SYNC | bval;
2755 dcb->min_nego_period = srb->msgin_buf[3];
2756
2757 if (dcb->sync_period & WIDE_SYNC)
2758 fact = 500;
2759 else
2760 fact = 250;
2761
2762 dprintkl(KERN_INFO,
2763 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2764 dcb->target_id, (fact == 500) ? "Wide16" : "",
2765 dcb->min_nego_period << 2, dcb->sync_offset,
2766 (fact / dcb->min_nego_period),
2767 ((fact % dcb->min_nego_period) * 10 +
2768 dcb->min_nego_period / 2) / dcb->min_nego_period);
2769
2770 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2771 /* Reply with corrected SDTR Message */
2772 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2773 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2774
2775 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2776 srb->msg_count = 5;
2777 DC395x_ENABLE_MSGOUT;
2778 dcb->sync_mode |= SYNC_NEGO_DONE;
2779 } else {
2780 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2781 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2782 build_wdtr(acb, dcb, srb);
2783 DC395x_ENABLE_MSGOUT;
2784 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2785 }
2786 }
2787 srb->state &= ~SRB_DO_SYNC_NEGO;
2788 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2789
2790 reprogram_regs(acb, dcb);
2791 }
2792
2793
2794 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2795 struct ScsiReqBlk *srb)
2796 {
2797 struct DeviceCtlBlk *dcb = srb->dcb;
2798 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2799
2800 dcb->sync_period &= ~WIDE_SYNC;
2801 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2802 dcb->sync_mode |= WIDE_NEGO_DONE;
2803 srb->state &= ~SRB_DO_WIDE_NEGO;
2804 reprogram_regs(acb, dcb);
2805 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2806 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2807 build_sdtr(acb, dcb, srb);
2808 DC395x_ENABLE_MSGOUT;
2809 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2810 }
2811 }
2812
2813 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2814 {
2815 struct DeviceCtlBlk *dcb = srb->dcb;
2816 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2817 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2818 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2819
2820 if (srb->msgin_buf[3] > wide)
2821 srb->msgin_buf[3] = wide;
2822 /* Completed */
2823 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2824 dprintkl(KERN_DEBUG,
2825 "msgin_set_wide: Wide nego initiated <%02i>\n",
2826 dcb->target_id);
2827 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2828 srb->msg_count = 4;
2829 srb->state |= SRB_DO_WIDE_NEGO;
2830 DC395x_ENABLE_MSGOUT;
2831 }
2832
2833 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2834 if (srb->msgin_buf[3] > 0)
2835 dcb->sync_period |= WIDE_SYNC;
2836 else
2837 dcb->sync_period &= ~WIDE_SYNC;
2838 srb->state &= ~SRB_DO_WIDE_NEGO;
2839 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2840 dprintkdbg(DBG_1,
2841 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2842 (8 << srb->msgin_buf[3]), dcb->target_id);
2843 reprogram_regs(acb, dcb);
2844 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2845 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2846 build_sdtr(acb, dcb, srb);
2847 DC395x_ENABLE_MSGOUT;
2848 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2849 }
2850 }
2851
2852
2853 /*
2854 * extended message codes:
2855 *
2856 * code description
2857 *
2858 * 02h Reserved
2859 * 00h MODIFY DATA POINTER
2860 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2861 * 03h WIDE DATA TRANSFER REQUEST
2862 * 04h - 7Fh Reserved
2863 * 80h - FFh Vendor specific
2864 */
2865 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2866 u16 *pscsi_status)
2867 {
2868 struct DeviceCtlBlk *dcb = acb->active_dcb;
2869 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2870
2871 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2872 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2873 /* Now eval the msg */
2874 switch (srb->msgin_buf[0]) {
2875 case DISCONNECT:
2876 srb->state = SRB_DISCONNECT;
2877 break;
2878
2879 case SIMPLE_QUEUE_TAG:
2880 case HEAD_OF_QUEUE_TAG:
2881 case ORDERED_QUEUE_TAG:
2882 srb =
2883 msgin_qtag(acb, dcb,
2884 srb->msgin_buf[1]);
2885 break;
2886
2887 case MESSAGE_REJECT:
2888 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2889 DO_CLRATN | DO_DATALATCH);
2890 /* A sync nego message was rejected ! */
2891 if (srb->state & SRB_DO_SYNC_NEGO) {
2892 msgin_set_async(acb, srb);
2893 break;
2894 }
2895 /* A wide nego message was rejected ! */
2896 if (srb->state & SRB_DO_WIDE_NEGO) {
2897 msgin_set_nowide(acb, srb);
2898 break;
2899 }
2900 enable_msgout_abort(acb, srb);
2901 /*srb->state |= SRB_ABORT_SENT */
2902 break;
2903
2904 case EXTENDED_MESSAGE:
2905 /* SDTR */
2906 if (srb->msgin_buf[1] == 3
2907 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2908 msgin_set_sync(acb, srb);
2909 break;
2910 }
2911 /* WDTR */
2912 if (srb->msgin_buf[1] == 2
2913 && srb->msgin_buf[2] == EXTENDED_WDTR
2914 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2915 msgin_set_wide(acb, srb);
2916 break;
2917 }
2918 msgin_reject(acb, srb);
2919 break;
2920
2921 case MSG_IGNOREWIDE:
2922 /* Discard wide residual */
2923 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2924 break;
2925
2926 case COMMAND_COMPLETE:
2927 /* nothing has to be done */
2928 break;
2929
2930 case SAVE_POINTERS:
2931 /*
2932 * SAVE POINTER may be ignored as we have the struct
2933 * ScsiReqBlk* associated with the scsi command.
2934 */
2935 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2936 "SAVE POINTER rem=%i Ignore\n",
2937 srb->cmd, srb->total_xfer_length);
2938 break;
2939
2940 case RESTORE_POINTERS:
2941 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2942 break;
2943
2944 case ABORT:
2945 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2946 "<%02i-%i> ABORT msg\n",
2947 srb->cmd, dcb->target_id,
2948 dcb->target_lun);
2949 dcb->flag |= ABORT_DEV_;
2950 enable_msgout_abort(acb, srb);
2951 break;
2952
2953 default:
2954 /* reject unknown messages */
2955 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2956 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2957 srb->msg_count = 1;
2958 srb->msgout_buf[0] = dcb->identify_msg;
2959 DC395x_ENABLE_MSGOUT;
2960 srb->state |= SRB_MSGOUT;
2961 /*break; */
2962 }
2963 msgin_reject(acb, srb);
2964 }
2965
2966 /* Clear counter and MsgIn state */
2967 srb->state &= ~SRB_MSGIN;
2968 acb->msg_len = 0;
2969 }
2970 *pscsi_status = PH_BUS_FREE;
2971 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2972 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2973 }
2974
2975
2976 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2977 u16 *pscsi_status)
2978 {
2979 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2980 clear_fifo(acb, "msgin_phase1");
2981 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2982 if (!(srb->state & SRB_MSGIN)) {
2983 srb->state &= ~SRB_DISCONNECT;
2984 srb->state |= SRB_MSGIN;
2985 }
2986 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2987 /* SCSI command */
2988 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2989 }
2990
2991
2992 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2993 u16 *pscsi_status)
2994 {
2995 }
2996
2997
2998 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2999 u16 *pscsi_status)
3000 {
3001 }
3002
3003
3004 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3005 {
3006 struct DeviceCtlBlk *i;
3007
3008 /* set all lun device's period, offset */
3009 if (dcb->identify_msg & 0x07)
3010 return;
3011
3012 if (acb->scan_devices) {
3013 current_sync_offset = dcb->sync_offset;
3014 return;
3015 }
3016
3017 list_for_each_entry(i, &acb->dcb_list, list)
3018 if (i->target_id == dcb->target_id) {
3019 i->sync_period = dcb->sync_period;
3020 i->sync_offset = dcb->sync_offset;
3021 i->sync_mode = dcb->sync_mode;
3022 i->min_nego_period = dcb->min_nego_period;
3023 }
3024 }
3025
3026
3027 static void disconnect(struct AdapterCtlBlk *acb)
3028 {
3029 struct DeviceCtlBlk *dcb = acb->active_dcb;
3030 struct ScsiReqBlk *srb;
3031
3032 if (!dcb) {
3033 dprintkl(KERN_ERR, "disconnect: No such device\n");
3034 udelay(500);
3035 /* Suspend queue for a while */
3036 acb->last_reset =
3037 jiffies + HZ / 2 +
3038 HZ * acb->eeprom.delay_time;
3039 clear_fifo(acb, "disconnectEx");
3040 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3041 return;
3042 }
3043 srb = dcb->active_srb;
3044 acb->active_dcb = NULL;
3045 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
3046
3047 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3048 clear_fifo(acb, "disconnect");
3049 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3050 if (srb->state & SRB_UNEXPECT_RESEL) {
3051 dprintkl(KERN_ERR,
3052 "disconnect: Unexpected reselection <%02i-%i>\n",
3053 dcb->target_id, dcb->target_lun);
3054 srb->state = 0;
3055 waiting_process_next(acb);
3056 } else if (srb->state & SRB_ABORT_SENT) {
3057 dcb->flag &= ~ABORT_DEV_;
3058 acb->last_reset = jiffies + HZ / 2 + 1;
3059 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3060 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3061 waiting_process_next(acb);
3062 } else {
3063 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3064 || !(srb->
3065 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3066 /*
3067 * Selection time out
3068 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3069 */
3070 /* Unexp. Disc / Sel Timeout */
3071 if (srb->state != SRB_START_
3072 && srb->state != SRB_MSGOUT) {
3073 srb->state = SRB_READY;
3074 dprintkl(KERN_DEBUG,
3075 "disconnect: (0x%p) Unexpected\n",
3076 srb->cmd);
3077 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3078 goto disc1;
3079 } else {
3080 /* Normal selection timeout */
3081 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
3082 "<%02i-%i> SelTO\n", srb->cmd,
3083 dcb->target_id, dcb->target_lun);
3084 if (srb->retry_count++ > DC395x_MAX_RETRIES
3085 || acb->scan_devices) {
3086 srb->target_status =
3087 SCSI_STAT_SEL_TIMEOUT;
3088 goto disc1;
3089 }
3090 free_tag(dcb, srb);
3091 srb_going_to_waiting_move(dcb, srb);
3092 dprintkdbg(DBG_KG,
3093 "disconnect: (0x%p) Retry\n",
3094 srb->cmd);
3095 waiting_set_timer(acb, HZ / 20);
3096 }
3097 } else if (srb->state & SRB_DISCONNECT) {
3098 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3099 /*
3100 * SRB_DISCONNECT (This is what we expect!)
3101 */
3102 if (bval & 0x40) {
3103 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3104 " 0x%02x: ACK set! Other controllers?\n",
3105 bval);
3106 /* It could come from another initiator, therefore don't do much ! */
3107 } else
3108 waiting_process_next(acb);
3109 } else if (srb->state & SRB_COMPLETED) {
3110 disc1:
3111 /*
3112 ** SRB_COMPLETED
3113 */
3114 free_tag(dcb, srb);
3115 dcb->active_srb = NULL;
3116 srb->state = SRB_FREE;
3117 srb_done(acb, dcb, srb);
3118 }
3119 }
3120 }
3121
3122
3123 static void reselect(struct AdapterCtlBlk *acb)
3124 {
3125 struct DeviceCtlBlk *dcb = acb->active_dcb;
3126 struct ScsiReqBlk *srb = NULL;
3127 u16 rsel_tar_lun_id;
3128 u8 id, lun;
3129 u8 arblostflag = 0;
3130 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3131
3132 clear_fifo(acb, "reselect");
3133 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3134 /* Read Reselected Target ID and LUN */
3135 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3136 if (dcb) { /* Arbitration lost but Reselection win */
3137 srb = dcb->active_srb;
3138 if (!srb) {
3139 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3140 "but active_srb == NULL\n");
3141 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3142 return;
3143 }
3144 /* Why the if ? */
3145 if (!acb->scan_devices) {
3146 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3147 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3148 srb->cmd, dcb->target_id,
3149 dcb->target_lun, rsel_tar_lun_id,
3150 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3151 arblostflag = 1;
3152 /*srb->state |= SRB_DISCONNECT; */
3153
3154 srb->state = SRB_READY;
3155 free_tag(dcb, srb);
3156 srb_going_to_waiting_move(dcb, srb);
3157 waiting_set_timer(acb, HZ / 20);
3158
3159 /* return; */
3160 }
3161 }
3162 /* Read Reselected Target Id and LUN */
3163 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3164 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3165 "Got %i!\n", rsel_tar_lun_id);
3166 id = rsel_tar_lun_id & 0xff;
3167 lun = (rsel_tar_lun_id >> 8) & 7;
3168 dcb = find_dcb(acb, id, lun);
3169 if (!dcb) {
3170 dprintkl(KERN_ERR, "reselect: From non existent device "
3171 "<%02i-%i>\n", id, lun);
3172 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3173 return;
3174 }
3175 acb->active_dcb = dcb;
3176
3177 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3178 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3179 "disconnection? <%02i-%i>\n",
3180 dcb->target_id, dcb->target_lun);
3181
3182 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3183 srb = acb->tmp_srb;
3184 dcb->active_srb = srb;
3185 } else {
3186 /* There can be only one! */
3187 srb = dcb->active_srb;
3188 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3189 /*
3190 * abort command
3191 */
3192 dprintkl(KERN_DEBUG,
3193 "reselect: w/o disconnected cmds <%02i-%i>\n",
3194 dcb->target_id, dcb->target_lun);
3195 srb = acb->tmp_srb;
3196 srb->state = SRB_UNEXPECT_RESEL;
3197 dcb->active_srb = srb;
3198 enable_msgout_abort(acb, srb);
3199 } else {
3200 if (dcb->flag & ABORT_DEV_) {
3201 /*srb->state = SRB_ABORT_SENT; */
3202 enable_msgout_abort(acb, srb);
3203 } else
3204 srb->state = SRB_DATA_XFER;
3205
3206 }
3207 }
3208 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3209
3210 /* Program HA ID, target ID, period and offset */
3211 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3212 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3213 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3214 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3215 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3216 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3217 /* SCSI command */
3218 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3219 }
3220
3221
3222 static inline u8 tagq_blacklist(char *name)
3223 {
3224 #ifndef DC395x_NO_TAGQ
3225 #if 0
3226 u8 i;
3227 for (i = 0; i < BADDEVCNT; i++)
3228 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3229 return 1;
3230 #endif
3231 return 0;
3232 #else
3233 return 1;
3234 #endif
3235 }
3236
3237
3238 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3239 {
3240 /* Check for SCSI format (ANSI and Response data format) */
3241 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3242 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3243 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3244 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3245 /* ((dcb->dev_type == TYPE_DISK)
3246 || (dcb->dev_type == TYPE_MOD)) && */
3247 !tagq_blacklist(((char *)ptr) + 8)) {
3248 if (dcb->max_command == 1)
3249 dcb->max_command =
3250 dcb->acb->tag_max_num;
3251 dcb->sync_mode |= EN_TAG_QUEUEING;
3252 /*dcb->tag_mask = 0; */
3253 } else
3254 dcb->max_command = 1;
3255 }
3256 }
3257
3258
3259 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3260 struct ScsiInqData *ptr)
3261 {
3262 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3263 dcb->dev_type = bval1;
3264 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3265 disc_tagq_set(dcb, ptr);
3266 }
3267
3268
3269 /* unmap mapped pci regions from SRB */
3270 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3271 {
3272 struct scsi_cmnd *cmd = srb->cmd;
3273 enum dma_data_direction dir = cmd->sc_data_direction;
3274
3275 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3276 /* unmap DC395x SG list */
3277 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3278 srb->sg_bus_addr, SEGMENTX_LEN);
3279 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3280 SEGMENTX_LEN,
3281 PCI_DMA_TODEVICE);
3282 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3283 scsi_sg_count(cmd), scsi_bufflen(cmd));
3284 /* unmap the sg segments */
3285 scsi_dma_unmap(cmd);
3286 }
3287 }
3288
3289
3290 /* unmap mapped pci sense buffer from SRB */
3291 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3292 struct ScsiReqBlk *srb)
3293 {
3294 if (!(srb->flag & AUTO_REQSENSE))
3295 return;
3296 /* Unmap sense buffer */
3297 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3298 srb->segment_x[0].address);
3299 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3300 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3301 /* Restore SG stuff */
3302 srb->total_xfer_length = srb->xferred;
3303 srb->segment_x[0].address =
3304 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3305 srb->segment_x[0].length =
3306 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3307 }
3308
3309
3310 /*
3311 * Complete execution of a SCSI command
3312 * Signal completion to the generic SCSI driver
3313 */
3314 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3315 struct ScsiReqBlk *srb)
3316 {
3317 u8 tempcnt, status;
3318 struct scsi_cmnd *cmd = srb->cmd;
3319 enum dma_data_direction dir = cmd->sc_data_direction;
3320 int ckc_only = 1;
3321
3322 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3323 srb->cmd->device->id, (u8)srb->cmd->device->lun);
3324 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3325 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3326 scsi_sgtalbe(cmd));
3327 status = srb->target_status;
3328 if (srb->flag & AUTO_REQSENSE) {
3329 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3330 pci_unmap_srb_sense(acb, srb);
3331 /*
3332 ** target status..........................
3333 */
3334 srb->flag &= ~AUTO_REQSENSE;
3335 srb->adapter_status = 0;
3336 srb->target_status = CHECK_CONDITION << 1;
3337 if (debug_enabled(DBG_1)) {
3338 switch (cmd->sense_buffer[2] & 0x0f) {
3339 case NOT_READY:
3340 dprintkl(KERN_DEBUG,
3341 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3342 cmd->cmnd[0], dcb->target_id,
3343 dcb->target_lun, status, acb->scan_devices);
3344 break;
3345 case UNIT_ATTENTION:
3346 dprintkl(KERN_DEBUG,
3347 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3348 cmd->cmnd[0], dcb->target_id,
3349 dcb->target_lun, status, acb->scan_devices);
3350 break;
3351 case ILLEGAL_REQUEST:
3352 dprintkl(KERN_DEBUG,
3353 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3354 cmd->cmnd[0], dcb->target_id,
3355 dcb->target_lun, status, acb->scan_devices);
3356 break;
3357 case MEDIUM_ERROR:
3358 dprintkl(KERN_DEBUG,
3359 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3360 cmd->cmnd[0], dcb->target_id,
3361 dcb->target_lun, status, acb->scan_devices);
3362 break;
3363 case HARDWARE_ERROR:
3364 dprintkl(KERN_DEBUG,
3365 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3366 cmd->cmnd[0], dcb->target_id,
3367 dcb->target_lun, status, acb->scan_devices);
3368 break;
3369 }
3370 if (cmd->sense_buffer[7] >= 6)
3371 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3372 "(0x%08x 0x%08x)\n",
3373 cmd->sense_buffer[2], cmd->sense_buffer[12],
3374 cmd->sense_buffer[13],
3375 *((unsigned int *)(cmd->sense_buffer + 3)),
3376 *((unsigned int *)(cmd->sense_buffer + 8)));
3377 else
3378 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3379 cmd->sense_buffer[2],
3380 *((unsigned int *)(cmd->sense_buffer + 3)));
3381 }
3382
3383 if (status == (CHECK_CONDITION << 1)) {
3384 cmd->result = DID_BAD_TARGET << 16;
3385 goto ckc_e;
3386 }
3387 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3388
3389 if (srb->total_xfer_length
3390 && srb->total_xfer_length >= cmd->underflow)
3391 cmd->result =
3392 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3393 srb->end_message, CHECK_CONDITION);
3394 /*SET_RES_DID(cmd->result,DID_OK) */
3395 else
3396 cmd->result =
3397 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3398 srb->end_message, CHECK_CONDITION);
3399
3400 goto ckc_e;
3401 }
3402
3403 /*************************************************************/
3404 if (status) {
3405 /*
3406 * target status..........................
3407 */
3408 if (status_byte(status) == CHECK_CONDITION) {
3409 request_sense(acb, dcb, srb);
3410 return;
3411 } else if (status_byte(status) == QUEUE_FULL) {
3412 tempcnt = (u8)list_size(&dcb->srb_going_list);
3413 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3414 dcb->target_id, dcb->target_lun, tempcnt);
3415 if (tempcnt > 1)
3416 tempcnt--;
3417 dcb->max_command = tempcnt;
3418 free_tag(dcb, srb);
3419 srb_going_to_waiting_move(dcb, srb);
3420 waiting_set_timer(acb, HZ / 20);
3421 srb->adapter_status = 0;
3422 srb->target_status = 0;
3423 return;
3424 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3425 srb->adapter_status = H_SEL_TIMEOUT;
3426 srb->target_status = 0;
3427 cmd->result = DID_NO_CONNECT << 16;
3428 } else {
3429 srb->adapter_status = 0;
3430 SET_RES_DID(cmd->result, DID_ERROR);
3431 SET_RES_MSG(cmd->result, srb->end_message);
3432 SET_RES_TARGET(cmd->result, status);
3433
3434 }
3435 } else {
3436 /*
3437 ** process initiator status..........................
3438 */
3439 status = srb->adapter_status;
3440 if (status & H_OVER_UNDER_RUN) {
3441 srb->target_status = 0;
3442 SET_RES_DID(cmd->result, DID_OK);
3443 SET_RES_MSG(cmd->result, srb->end_message);
3444 } else if (srb->status & PARITY_ERROR) {
3445 SET_RES_DID(cmd->result, DID_PARITY);
3446 SET_RES_MSG(cmd->result, srb->end_message);
3447 } else { /* No error */
3448
3449 srb->adapter_status = 0;
3450 srb->target_status = 0;
3451 SET_RES_DID(cmd->result, DID_OK);
3452 }
3453 }
3454
3455 ckc_only = 0;
3456 /* Check Error Conditions */
3457 ckc_e:
3458
3459 pci_unmap_srb(acb, srb);
3460
3461 if (cmd->cmnd[0] == INQUIRY) {
3462 unsigned char *base = NULL;
3463 struct ScsiInqData *ptr;
3464 unsigned long flags = 0;
3465 struct scatterlist* sg = scsi_sglist(cmd);
3466 size_t offset = 0, len = sizeof(struct ScsiInqData);
3467
3468 local_irq_save(flags);
3469 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3470 ptr = (struct ScsiInqData *)(base + offset);
3471
3472 if (!ckc_only && (cmd->result & RES_DID) == 0
3473 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3474 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3475 dcb->inquiry7 = ptr->Flags;
3476
3477 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3478 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3479 if ((cmd->result == (DID_OK << 16) ||
3480 status_byte(cmd->result) == CHECK_CONDITION)) {
3481 if (!dcb->init_tcq_flag) {
3482 add_dev(acb, dcb, ptr);
3483 dcb->init_tcq_flag = 1;
3484 }
3485 }
3486
3487 scsi_kunmap_atomic_sg(base);
3488 local_irq_restore(flags);
3489 }
3490
3491 /* Here is the info for Doug Gilbert's sg3 ... */
3492 scsi_set_resid(cmd, srb->total_xfer_length);
3493 /* This may be interpreted by sb. or not ... */
3494 cmd->SCp.this_residual = srb->total_xfer_length;
3495 cmd->SCp.buffers_residual = 0;
3496 if (debug_enabled(DBG_KG)) {
3497 if (srb->total_xfer_length)
3498 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3499 "cmnd=0x%02x Missed %i bytes\n",
3500 cmd, cmd->device->id, (u8)cmd->device->lun,
3501 cmd->cmnd[0], srb->total_xfer_length);
3502 }
3503
3504 srb_going_remove(dcb, srb);
3505 /* Add to free list */
3506 if (srb == acb->tmp_srb)
3507 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3508 else {
3509 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3510 cmd, cmd->result);
3511 srb_free_insert(acb, srb);
3512 }
3513
3514 cmd->scsi_done(cmd);
3515 waiting_process_next(acb);
3516 }
3517
3518
3519 /* abort all cmds in our queues */
3520 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3521 struct scsi_cmnd *cmd, u8 force)
3522 {
3523 struct DeviceCtlBlk *dcb;
3524 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3525
3526 list_for_each_entry(dcb, &acb->dcb_list, list) {
3527 struct ScsiReqBlk *srb;
3528 struct ScsiReqBlk *tmp;
3529 struct scsi_cmnd *p;
3530
3531 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3532 enum dma_data_direction dir;
3533 int result;
3534
3535 p = srb->cmd;
3536 dir = p->sc_data_direction;
3537 result = MK_RES(0, did_flag, 0, 0);
3538 printk("G:%p(%02i-%i) ", p,
3539 p->device->id, (u8)p->device->lun);
3540 srb_going_remove(dcb, srb);
3541 free_tag(dcb, srb);
3542 srb_free_insert(acb, srb);
3543 p->result = result;
3544 pci_unmap_srb_sense(acb, srb);
3545 pci_unmap_srb(acb, srb);
3546 if (force) {
3547 /* For new EH, we normally don't need to give commands back,
3548 * as they all complete or all time out */
3549 p->scsi_done(p);
3550 }
3551 }
3552 if (!list_empty(&dcb->srb_going_list))
3553 dprintkl(KERN_DEBUG,
3554 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3555 dcb->target_id, dcb->target_lun);
3556 if (dcb->tag_mask)
3557 dprintkl(KERN_DEBUG,
3558 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3559 dcb->target_id, dcb->target_lun,
3560 dcb->tag_mask);
3561
3562 /* Waiting queue */
3563 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3564 int result;
3565 p = srb->cmd;
3566
3567 result = MK_RES(0, did_flag, 0, 0);
3568 printk("W:%p<%02i-%i>", p, p->device->id,
3569 (u8)p->device->lun);
3570 srb_waiting_remove(dcb, srb);
3571 srb_free_insert(acb, srb);
3572 p->result = result;
3573 pci_unmap_srb_sense(acb, srb);
3574 pci_unmap_srb(acb, srb);
3575 if (force) {
3576 /* For new EH, we normally don't need to give commands back,
3577 * as they all complete or all time out */
3578 cmd->scsi_done(cmd);
3579 }
3580 }
3581 if (!list_empty(&dcb->srb_waiting_list))
3582 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3583 list_size(&dcb->srb_waiting_list), dcb->target_id,
3584 dcb->target_lun);
3585 dcb->flag &= ~ABORT_DEV_;
3586 }
3587 printk("\n");
3588 }
3589
3590
3591 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3592 {
3593 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3594 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3595 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3596
3597 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3598 /* nothing */;
3599 }
3600
3601
3602 static void set_basic_config(struct AdapterCtlBlk *acb)
3603 {
3604 u8 bval;
3605 u16 wval;
3606 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3607 if (acb->config & HCC_PARITY)
3608 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3609 else
3610 bval = PHASELATCH | INITIATOR | BLOCKRST;
3611
3612 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3613
3614 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3615 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3616 /* program Host ID */
3617 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3618 /* set ansynchronous transfer */
3619 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3620 /* Turn LED control off */
3621 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3622 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3623 /* DMA config */
3624 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3625 wval |=
3626 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3627 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3628 /* Clear pending interrupt status */
3629 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3630 /* Enable SCSI interrupt */
3631 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3632 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3633 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3634 );
3635 }
3636
3637
3638 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3639 {
3640 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3641 /* delay half a second */
3642 if (timer_pending(&acb->waiting_timer))
3643 del_timer(&acb->waiting_timer);
3644
3645 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3646 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3647 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3648 udelay(500);
3649 /* Maybe we locked up the bus? Then lets wait even longer ... */
3650 acb->last_reset =
3651 jiffies + 5 * HZ / 2 +
3652 HZ * acb->eeprom.delay_time;
3653
3654 clear_fifo(acb, "scsi_reset_detect");
3655 set_basic_config(acb);
3656 /*1.25 */
3657 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3658
3659 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3660 acb->acb_flag |= RESET_DONE;
3661 } else {
3662 acb->acb_flag |= RESET_DETECT;
3663 reset_dev_param(acb);
3664 doing_srb_done(acb, DID_RESET, NULL, 1);
3665 /*DC395x_RecoverSRB( acb ); */
3666 acb->active_dcb = NULL;
3667 acb->acb_flag = 0;
3668 waiting_process_next(acb);
3669 }
3670 }
3671
3672
3673 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3674 struct ScsiReqBlk *srb)
3675 {
3676 struct scsi_cmnd *cmd = srb->cmd;
3677 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3678 cmd, cmd->device->id, (u8)cmd->device->lun);
3679
3680 srb->flag |= AUTO_REQSENSE;
3681 srb->adapter_status = 0;
3682 srb->target_status = 0;
3683
3684 /* KG: Can this prevent crap sense data ? */
3685 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3686
3687 /* Save some data */
3688 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3689 srb->segment_x[0].address;
3690 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3691 srb->segment_x[0].length;
3692 srb->xferred = srb->total_xfer_length;
3693 /* srb->segment_x : a one entry of S/G list table */
3694 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3695 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3696 /* Map sense buffer */
3697 srb->segment_x[0].address =
3698 pci_map_single(acb->dev, cmd->sense_buffer,
3699 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3700 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3701 cmd->sense_buffer, srb->segment_x[0].address,
3702 SCSI_SENSE_BUFFERSIZE);
3703 srb->sg_count = 1;
3704 srb->sg_index = 0;
3705
3706 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3707 dprintkl(KERN_DEBUG,
3708 "request_sense: (0x%p) failed <%02i-%i>\n",
3709 srb->cmd, dcb->target_id, dcb->target_lun);
3710 srb_going_to_waiting_move(dcb, srb);
3711 waiting_set_timer(acb, HZ / 100);
3712 }
3713 }
3714
3715
3716 /**
3717 * device_alloc - Allocate a new device instance. This create the
3718 * devices instance and sets up all the data items. The adapter
3719 * instance is required to obtain confiuration information for this
3720 * device. This does *not* add this device to the adapters device
3721 * list.
3722 *
3723 * @acb: The adapter to obtain configuration information from.
3724 * @target: The target for the new device.
3725 * @lun: The lun for the new device.
3726 *
3727 * Return the new device if successful or NULL on failure.
3728 **/
3729 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3730 u8 target, u8 lun)
3731 {
3732 struct NvRamType *eeprom = &acb->eeprom;
3733 u8 period_index = eeprom->target[target].period & 0x07;
3734 struct DeviceCtlBlk *dcb;
3735
3736 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3737 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3738 if (!dcb)
3739 return NULL;
3740 dcb->acb = NULL;
3741 INIT_LIST_HEAD(&dcb->srb_going_list);
3742 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3743 dcb->active_srb = NULL;
3744 dcb->tag_mask = 0;
3745 dcb->max_command = 1;
3746 dcb->target_id = target;
3747 dcb->target_lun = lun;
3748 dcb->dev_mode = eeprom->target[target].cfg0;
3749 #ifndef DC395x_NO_DISCONNECT
3750 dcb->identify_msg =
3751 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3752 #else
3753 dcb->identify_msg = IDENTIFY(0, lun);
3754 #endif
3755 dcb->inquiry7 = 0;
3756 dcb->sync_mode = 0;
3757 dcb->min_nego_period = clock_period[period_index];
3758 dcb->sync_period = 0;
3759 dcb->sync_offset = 0;
3760 dcb->flag = 0;
3761
3762 #ifndef DC395x_NO_WIDE
3763 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3764 && (acb->config & HCC_WIDE_CARD))
3765 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3766 #endif
3767 #ifndef DC395x_NO_SYNC
3768 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3769 if (!(lun) || current_sync_offset)
3770 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3771 #endif
3772 if (dcb->target_lun != 0) {
3773 /* Copy settings */
3774 struct DeviceCtlBlk *p;
3775 list_for_each_entry(p, &acb->dcb_list, list)
3776 if (p->target_id == dcb->target_id)
3777 break;
3778 dprintkdbg(DBG_1,
3779 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3780 dcb->target_id, dcb->target_lun,
3781 p->target_id, p->target_lun);
3782 dcb->sync_mode = p->sync_mode;
3783 dcb->sync_period = p->sync_period;
3784 dcb->min_nego_period = p->min_nego_period;
3785 dcb->sync_offset = p->sync_offset;
3786 dcb->inquiry7 = p->inquiry7;
3787 }
3788 return dcb;
3789 }
3790
3791
3792 /**
3793 * adapter_add_device - Adds the device instance to the adaptor instance.
3794 *
3795 * @acb: The adapter device to be updated
3796 * @dcb: A newly created and initialised device instance to add.
3797 **/
3798 static void adapter_add_device(struct AdapterCtlBlk *acb,
3799 struct DeviceCtlBlk *dcb)
3800 {
3801 /* backpointer to adapter */
3802 dcb->acb = acb;
3803
3804 /* set run_robin to this device if it is currently empty */
3805 if (list_empty(&acb->dcb_list))
3806 acb->dcb_run_robin = dcb;
3807
3808 /* add device to list */
3809 list_add_tail(&dcb->list, &acb->dcb_list);
3810
3811 /* update device maps */
3812 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3813 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3814 }
3815
3816
3817 /**
3818 * adapter_remove_device - Removes the device instance from the adaptor
3819 * instance. The device instance is not check in any way or freed by this.
3820 * The caller is expected to take care of that. This will simply remove the
3821 * device from the adapters data strcutures.
3822 *
3823 * @acb: The adapter device to be updated
3824 * @dcb: A device that has previously been added to the adapter.
3825 **/
3826 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3827 struct DeviceCtlBlk *dcb)
3828 {
3829 struct DeviceCtlBlk *i;
3830 struct DeviceCtlBlk *tmp;
3831 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3832 dcb->target_id, dcb->target_lun);
3833
3834 /* fix up any pointers to this device that we have in the adapter */
3835 if (acb->active_dcb == dcb)
3836 acb->active_dcb = NULL;
3837 if (acb->dcb_run_robin == dcb)
3838 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3839
3840 /* unlink from list */
3841 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3842 if (dcb == i) {
3843 list_del(&i->list);
3844 break;
3845 }
3846
3847 /* clear map and children */
3848 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3849 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3850 dcb->acb = NULL;
3851 }
3852
3853
3854 /**
3855 * adapter_remove_and_free_device - Removes a single device from the adapter
3856 * and then frees the device information.
3857 *
3858 * @acb: The adapter device to be updated
3859 * @dcb: A device that has previously been added to the adapter.
3860 */
3861 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3862 struct DeviceCtlBlk *dcb)
3863 {
3864 if (list_size(&dcb->srb_going_list) > 1) {
3865 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3866 "Won't remove because of %i active requests.\n",
3867 dcb->target_id, dcb->target_lun,
3868 list_size(&dcb->srb_going_list));
3869 return;
3870 }
3871 adapter_remove_device(acb, dcb);
3872 kfree(dcb);
3873 }
3874
3875
3876 /**
3877 * adapter_remove_and_free_all_devices - Removes and frees all of the
3878 * devices associated with the specified adapter.
3879 *
3880 * @acb: The adapter from which all devices should be removed.
3881 **/
3882 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3883 {
3884 struct DeviceCtlBlk *dcb;
3885 struct DeviceCtlBlk *tmp;
3886 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3887 list_size(&acb->dcb_list));
3888
3889 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3890 adapter_remove_and_free_device(acb, dcb);
3891 }
3892
3893
3894 /**
3895 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3896 * scsi device that we need to deal with. We allocate a new device and then
3897 * insert that device into the adapters device list.
3898 *
3899 * @scsi_device: The new scsi device that we need to handle.
3900 **/
3901 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3902 {
3903 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3904 struct DeviceCtlBlk *dcb;
3905
3906 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3907 if (!dcb)
3908 return -ENOMEM;
3909 adapter_add_device(acb, dcb);
3910
3911 return 0;
3912 }
3913
3914
3915 /**
3916 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3917 * device that is going away.
3918 *
3919 * @scsi_device: The new scsi device that we need to handle.
3920 **/
3921 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3922 {
3923 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3924 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3925 if (dcb)
3926 adapter_remove_and_free_device(acb, dcb);
3927 }
3928
3929
3930
3931
3932 /**
3933 * trms1040_wait_30us: wait for 30 us
3934 *
3935 * Waits for 30us (using the chip by the looks of it..)
3936 *
3937 * @io_port: base I/O address
3938 **/
3939 static void trms1040_wait_30us(unsigned long io_port)
3940 {
3941 /* ScsiPortStallExecution(30); wait 30 us */
3942 outb(5, io_port + TRM_S1040_GEN_TIMER);
3943 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3944 /* nothing */ ;
3945 }
3946
3947
3948 /**
3949 * trms1040_write_cmd - write the secified command and address to
3950 * chip
3951 *
3952 * @io_port: base I/O address
3953 * @cmd: SB + op code (command) to send
3954 * @addr: address to send
3955 **/
3956 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3957 {
3958 int i;
3959 u8 send_data;
3960
3961 /* program SB + OP code */
3962 for (i = 0; i < 3; i++, cmd <<= 1) {
3963 send_data = NVR_SELECT;
3964 if (cmd & 0x04) /* Start from bit 2 */
3965 send_data |= NVR_BITOUT;
3966
3967 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3968 trms1040_wait_30us(io_port);
3969 outb((send_data | NVR_CLOCK),
3970 io_port + TRM_S1040_GEN_NVRAM);
3971 trms1040_wait_30us(io_port);
3972 }
3973
3974 /* send address */
3975 for (i = 0; i < 7; i++, addr <<= 1) {
3976 send_data = NVR_SELECT;
3977 if (addr & 0x40) /* Start from bit 6 */
3978 send_data |= NVR_BITOUT;
3979
3980 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3981 trms1040_wait_30us(io_port);
3982 outb((send_data | NVR_CLOCK),
3983 io_port + TRM_S1040_GEN_NVRAM);
3984 trms1040_wait_30us(io_port);
3985 }
3986 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3987 trms1040_wait_30us(io_port);
3988 }
3989
3990
3991 /**
3992 * trms1040_set_data - store a single byte in the eeprom
3993 *
3994 * Called from write all to write a single byte into the SSEEPROM
3995 * Which is done one bit at a time.
3996 *
3997 * @io_port: base I/O address
3998 * @addr: offset into EEPROM
3999 * @byte: bytes to write
4000 **/
4001 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4002 {
4003 int i;
4004 u8 send_data;
4005
4006 /* Send write command & address */
4007 trms1040_write_cmd(io_port, 0x05, addr);
4008
4009 /* Write data */
4010 for (i = 0; i < 8; i++, byte <<= 1) {
4011 send_data = NVR_SELECT;
4012 if (byte & 0x80) /* Start from bit 7 */
4013 send_data |= NVR_BITOUT;
4014
4015 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4016 trms1040_wait_30us(io_port);
4017 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4018 trms1040_wait_30us(io_port);
4019 }
4020 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4021 trms1040_wait_30us(io_port);
4022
4023 /* Disable chip select */
4024 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4025 trms1040_wait_30us(io_port);
4026
4027 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4028 trms1040_wait_30us(io_port);
4029
4030 /* Wait for write ready */
4031 while (1) {
4032 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4033 trms1040_wait_30us(io_port);
4034
4035 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4036 trms1040_wait_30us(io_port);
4037
4038 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4039 break;
4040 }
4041
4042 /* Disable chip select */
4043 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4044 }
4045
4046
4047 /**
4048 * trms1040_write_all - write 128 bytes to the eeprom
4049 *
4050 * Write the supplied 128 bytes to the chips SEEPROM
4051 *
4052 * @eeprom: the data to write
4053 * @io_port: the base io port
4054 **/
4055 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4056 {
4057 u8 *b_eeprom = (u8 *)eeprom;
4058 u8 addr;
4059
4060 /* Enable SEEPROM */
4061 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4062 io_port + TRM_S1040_GEN_CONTROL);
4063
4064 /* write enable */
4065 trms1040_write_cmd(io_port, 0x04, 0xFF);
4066 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4067 trms1040_wait_30us(io_port);
4068
4069 /* write */
4070 for (addr = 0; addr < 128; addr++, b_eeprom++)
4071 trms1040_set_data(io_port, addr, *b_eeprom);
4072
4073 /* write disable */
4074 trms1040_write_cmd(io_port, 0x04, 0x00);
4075 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4076 trms1040_wait_30us(io_port);
4077
4078 /* Disable SEEPROM */
4079 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4080 io_port + TRM_S1040_GEN_CONTROL);
4081 }
4082
4083
4084 /**
4085 * trms1040_get_data - get a single byte from the eeprom
4086 *
4087 * Called from read all to read a single byte into the SSEEPROM
4088 * Which is done one bit at a time.
4089 *
4090 * @io_port: base I/O address
4091 * @addr: offset into SEEPROM
4092 *
4093 * Returns the byte read.
4094 **/
4095 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
4096 {
4097 int i;
4098 u8 read_byte;
4099 u8 result = 0;
4100
4101 /* Send read command & address */
4102 trms1040_write_cmd(io_port, 0x06, addr);
4103
4104 /* read data */
4105 for (i = 0; i < 8; i++) {
4106 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4107 trms1040_wait_30us(io_port);
4108 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4109
4110 /* Get data bit while falling edge */
4111 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4112 result <<= 1;
4113 if (read_byte & NVR_BITIN)
4114 result |= 1;
4115
4116 trms1040_wait_30us(io_port);
4117 }
4118
4119 /* Disable chip select */
4120 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4121 return result;
4122 }
4123
4124
4125 /**
4126 * trms1040_read_all - read all bytes from the eeprom
4127 *
4128 * Read the 128 bytes from the SEEPROM.
4129 *
4130 * @eeprom: where to store the data
4131 * @io_port: the base io port
4132 **/
4133 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4134 {
4135 u8 *b_eeprom = (u8 *)eeprom;
4136 u8 addr;
4137
4138 /* Enable SEEPROM */
4139 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4140 io_port + TRM_S1040_GEN_CONTROL);
4141
4142 /* read details */
4143 for (addr = 0; addr < 128; addr++, b_eeprom++)
4144 *b_eeprom = trms1040_get_data(io_port, addr);
4145
4146 /* Disable SEEPROM */
4147 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4148 io_port + TRM_S1040_GEN_CONTROL);
4149 }
4150
4151
4152
4153 /**
4154 * check_eeprom - get and check contents of the eeprom
4155 *
4156 * Read seeprom 128 bytes into the memory provider in eeprom.
4157 * Checks the checksum and if it's not correct it uses a set of default
4158 * values.
4159 *
4160 * @eeprom: caller allocated strcuture to read the eeprom data into
4161 * @io_port: io port to read from
4162 **/
4163 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4164 {
4165 u16 *w_eeprom = (u16 *)eeprom;
4166 u16 w_addr;
4167 u16 cksum;
4168 u32 d_addr;
4169 u32 *d_eeprom;
4170
4171 trms1040_read_all(eeprom, io_port); /* read eeprom */
4172
4173 cksum = 0;
4174 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4175 w_addr++, w_eeprom++)
4176 cksum += *w_eeprom;
4177 if (cksum != 0x1234) {
4178 /*
4179 * Checksum is wrong.
4180 * Load a set of defaults into the eeprom buffer
4181 */
4182 dprintkl(KERN_WARNING,
4183 "EEProm checksum error: using default values and options.\n");
4184 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4185 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4186 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4187 eeprom->sub_sys_id[1] =
4188 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4189 eeprom->sub_class = 0x00;
4190 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4191 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4192 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4193 eeprom->device_id[1] =
4194 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4195 eeprom->reserved = 0x00;
4196
4197 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4198 d_addr < 16; d_addr++, d_eeprom++)
4199 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4200
4201 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4202 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4203 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4204 *d_eeprom = 0x00;
4205
4206 /* Now load defaults (maybe set by boot/module params) */
4207 set_safe_settings();
4208 fix_settings();
4209 eeprom_override(eeprom);
4210
4211 eeprom->cksum = 0x00;
4212 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4213 w_addr < 63; w_addr++, w_eeprom++)
4214 cksum += *w_eeprom;
4215
4216 *w_eeprom = 0x1234 - cksum;
4217 trms1040_write_all(eeprom, io_port);
4218 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4219 } else {
4220 set_safe_settings();
4221 eeprom_index_to_delay(eeprom);
4222 eeprom_override(eeprom);
4223 }
4224 }
4225
4226
4227 /**
4228 * print_eeprom_settings - output the eeprom settings
4229 * to the kernel log so people can see what they were.
4230 *
4231 * @eeprom: The eeprom data strucutre to show details for.
4232 **/
4233 static void print_eeprom_settings(struct NvRamType *eeprom)
4234 {
4235 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4236 eeprom->scsi_id,
4237 eeprom->target[0].period,
4238 clock_speed[eeprom->target[0].period] / 10,
4239 clock_speed[eeprom->target[0].period] % 10,
4240 eeprom->target[0].cfg0);
4241 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4242 eeprom->channel_cfg, eeprom->max_tag,
4243 1 << eeprom->max_tag, eeprom->delay_time);
4244 }
4245
4246
4247 /* Free SG tables */
4248 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4249 {
4250 int i;
4251 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4252
4253 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4254 kfree(acb->srb_array[i].segment_x);
4255 }
4256
4257
4258 /*
4259 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4260 * should never cross a page boundary */
4261 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4262 {
4263 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4264 *SEGMENTX_LEN;
4265 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4266 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4267 int srb_idx = 0;
4268 unsigned i = 0;
4269 struct SGentry *uninitialized_var(ptr);
4270
4271 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4272 acb->srb_array[i].segment_x = NULL;
4273
4274 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4275 while (pages--) {
4276 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4277 if (!ptr) {
4278 adapter_sg_tables_free(acb);
4279 return 1;
4280 }
4281 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4282 PAGE_SIZE, ptr, srb_idx);
4283 i = 0;
4284 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4285 acb->srb_array[srb_idx++].segment_x =
4286 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4287 }
4288 if (i < srbs_per_page)
4289 acb->srb.segment_x =
4290 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4291 else
4292 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4293 return 0;
4294 }
4295
4296
4297
4298 /**
4299 * adapter_print_config - print adapter connection and termination
4300 * config
4301 *
4302 * The io port in the adapter needs to have been set before calling
4303 * this function.
4304 *
4305 * @acb: The adapter to print the information for.
4306 **/
4307 static void adapter_print_config(struct AdapterCtlBlk *acb)
4308 {
4309 u8 bval;
4310
4311 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4312 dprintkl(KERN_INFO, "%sConnectors: ",
4313 ((bval & WIDESCSI) ? "(Wide) " : ""));
4314 if (!(bval & CON5068))
4315 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4316 if (!(bval & CON68))
4317 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4318 if (!(bval & CON50))
4319 printk("int50 ");
4320 if ((bval & (CON5068 | CON50 | CON68)) ==
4321 0 /*(CON5068 | CON50 | CON68) */ )
4322 printk(" Oops! (All 3?) ");
4323 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4324 printk(" Termination: ");
4325 if (bval & DIS_TERM)
4326 printk("Disabled\n");
4327 else {
4328 if (bval & AUTOTERM)
4329 printk("Auto ");
4330 if (bval & LOW8TERM)
4331 printk("Low ");
4332 if (bval & UP8TERM)
4333 printk("High ");
4334 printk("\n");
4335 }
4336 }
4337
4338
4339 /**
4340 * adapter_init_params - Initialize the various parameters in the
4341 * adapter structure. Note that the pointer to the scsi_host is set
4342 * early (when this instance is created) and the io_port and irq
4343 * values are set later after they have been reserved. This just gets
4344 * everything set to a good starting position.
4345 *
4346 * The eeprom structure in the adapter needs to have been set before
4347 * calling this function.
4348 *
4349 * @acb: The adapter to initialize.
4350 **/
4351 static void adapter_init_params(struct AdapterCtlBlk *acb)
4352 {
4353 struct NvRamType *eeprom = &acb->eeprom;
4354 int i;
4355
4356 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4357 /* NOTE: acb->io_port_base is set at port registration time */
4358 /* NOTE: acb->io_port_len is set at port registration time */
4359
4360 INIT_LIST_HEAD(&acb->dcb_list);
4361 acb->dcb_run_robin = NULL;
4362 acb->active_dcb = NULL;
4363
4364 INIT_LIST_HEAD(&acb->srb_free_list);
4365 /* temp SRB for Q tag used or abort command used */
4366 acb->tmp_srb = &acb->srb;
4367 timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4368 timer_setup(&acb->selto_timer, NULL, 0);
4369
4370 acb->srb_count = DC395x_MAX_SRB_CNT;
4371
4372 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4373 /* NOTE: acb->irq_level is set at IRQ registration time */
4374
4375 acb->tag_max_num = 1 << eeprom->max_tag;
4376 if (acb->tag_max_num > 30)
4377 acb->tag_max_num = 30;
4378
4379 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4380 acb->gmode2 = eeprom->channel_cfg;
4381 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4382
4383 if (eeprom->channel_cfg & NAC_SCANLUN)
4384 acb->lun_chk = 1;
4385 acb->scan_devices = 1;
4386
4387 acb->scsi_host->this_id = eeprom->scsi_id;
4388 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4389
4390 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4391 acb->dcb_map[i] = 0;
4392
4393 acb->msg_len = 0;
4394
4395 /* link static array of srbs into the srb free list */
4396 for (i = 0; i < acb->srb_count - 1; i++)
4397 srb_free_insert(acb, &acb->srb_array[i]);
4398 }
4399
4400
4401 /**
4402 * adapter_init_host - Initialize the scsi host instance based on
4403 * values that we have already stored in the adapter instance. There's
4404 * some mention that a lot of these are deprecated, so we won't use
4405 * them (we'll use the ones in the adapter instance) but we'll fill
4406 * them in in case something else needs them.
4407 *
4408 * The eeprom structure, irq and io ports in the adapter need to have
4409 * been set before calling this function.
4410 *
4411 * @host: The scsi host instance to fill in the values for.
4412 **/
4413 static void adapter_init_scsi_host(struct Scsi_Host *host)
4414 {
4415 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4416 struct NvRamType *eeprom = &acb->eeprom;
4417
4418 host->max_cmd_len = 24;
4419 host->can_queue = DC395x_MAX_CMD_QUEUE;
4420 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4421 host->this_id = (int)eeprom->scsi_id;
4422 host->io_port = acb->io_port_base;
4423 host->n_io_port = acb->io_port_len;
4424 host->dma_channel = -1;
4425 host->unique_id = acb->io_port_base;
4426 host->irq = acb->irq_level;
4427 acb->last_reset = jiffies;
4428
4429 host->max_id = 16;
4430 if (host->max_id - 1 == eeprom->scsi_id)
4431 host->max_id--;
4432
4433 if (eeprom->channel_cfg & NAC_SCANLUN)
4434 host->max_lun = 8;
4435 else
4436 host->max_lun = 1;
4437 }
4438
4439
4440 /**
4441 * adapter_init_chip - Get the chip into a know state and figure out
4442 * some of the settings that apply to this adapter.
4443 *
4444 * The io port in the adapter needs to have been set before calling
4445 * this function. The config will be configured correctly on return.
4446 *
4447 * @acb: The adapter which we are to init.
4448 **/
4449 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4450 {
4451 struct NvRamType *eeprom = &acb->eeprom;
4452
4453 /* Mask all the interrupt */
4454 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4455 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4456
4457 /* Reset SCSI module */
4458 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4459
4460 /* Reset PCI/DMA module */
4461 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4462 udelay(20);
4463
4464 /* program configuration 0 */
4465 acb->config = HCC_AUTOTERM | HCC_PARITY;
4466 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4467 acb->config |= HCC_WIDE_CARD;
4468
4469 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4470 acb->config |= HCC_SCSI_RESET;
4471
4472 if (acb->config & HCC_SCSI_RESET) {
4473 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4474 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4475
4476 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4477 /*spin_unlock_irq (&io_request_lock); */
4478 udelay(500);
4479
4480 acb->last_reset =
4481 jiffies + HZ / 2 +
4482 HZ * acb->eeprom.delay_time;
4483
4484 /*spin_lock_irq (&io_request_lock); */
4485 }
4486 }
4487
4488
4489 /**
4490 * init_adapter - Grab the resource for the card, setup the adapter
4491 * information, set the card into a known state, create the various
4492 * tables etc etc. This basically gets all adapter information all up
4493 * to date, initialised and gets the chip in sync with it.
4494 *
4495 * @host: This hosts adapter structure
4496 * @io_port: The base I/O port
4497 * @irq: IRQ
4498 *
4499 * Returns 0 if the initialization succeeds, any other value on
4500 * failure.
4501 **/
4502 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4503 u32 io_port_len, unsigned int irq)
4504 {
4505 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4506 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4507 goto failed;
4508 }
4509 /* store port base to indicate we have registered it */
4510 acb->io_port_base = io_port;
4511 acb->io_port_len = io_port_len;
4512
4513 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4514 /* release the region we just claimed */
4515 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4516 goto failed;
4517 }
4518 /* store irq to indicate we have registered it */
4519 acb->irq_level = irq;
4520
4521 /* get eeprom configuration information and command line settings etc */
4522 check_eeprom(&acb->eeprom, io_port);
4523 print_eeprom_settings(&acb->eeprom);
4524
4525 /* setup adapter control block */
4526 adapter_init_params(acb);
4527
4528 /* display card connectors/termination settings */
4529 adapter_print_config(acb);
4530
4531 if (adapter_sg_tables_alloc(acb)) {
4532 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4533 goto failed;
4534 }
4535 adapter_init_scsi_host(acb->scsi_host);
4536 adapter_init_chip(acb);
4537 set_basic_config(acb);
4538
4539 dprintkdbg(DBG_0,
4540 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4541 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4542 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4543 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4544 return 0;
4545
4546 failed:
4547 if (acb->irq_level)
4548 free_irq(acb->irq_level, acb);
4549 if (acb->io_port_base)
4550 release_region(acb->io_port_base, acb->io_port_len);
4551 adapter_sg_tables_free(acb);
4552
4553 return 1;
4554 }
4555
4556
4557 /**
4558 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4559 * stopping all operations and disabling interrupt generation on the
4560 * card.
4561 *
4562 * @acb: The adapter which we are to shutdown.
4563 **/
4564 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4565 {
4566 /* disable interrupts */
4567 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4568 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4569
4570 /* reset the scsi bus */
4571 if (acb->config & HCC_SCSI_RESET)
4572 reset_scsi_bus(acb);
4573
4574 /* clear any pending interrupt state */
4575 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4576 }
4577
4578
4579
4580 /**
4581 * adapter_uninit - Shut down the chip and release any resources that
4582 * we had allocated. Once this returns the adapter should not be used
4583 * anymore.
4584 *
4585 * @acb: The adapter which we are to un-initialize.
4586 **/
4587 static void adapter_uninit(struct AdapterCtlBlk *acb)
4588 {
4589 unsigned long flags;
4590 DC395x_LOCK_IO(acb->scsi_host, flags);
4591
4592 /* remove timers */
4593 if (timer_pending(&acb->waiting_timer))
4594 del_timer(&acb->waiting_timer);
4595 if (timer_pending(&acb->selto_timer))
4596 del_timer(&acb->selto_timer);
4597
4598 adapter_uninit_chip(acb);
4599 adapter_remove_and_free_all_devices(acb);
4600 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4601
4602 if (acb->irq_level)
4603 free_irq(acb->irq_level, acb);
4604 if (acb->io_port_base)
4605 release_region(acb->io_port_base, acb->io_port_len);
4606
4607 adapter_sg_tables_free(acb);
4608 }
4609
4610
4611 #undef YESNO
4612 #define YESNO(YN) \
4613 if (YN) seq_printf(m, " Yes ");\
4614 else seq_printf(m, " No ")
4615
4616 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4617 {
4618 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4619 int spd, spd1;
4620 struct DeviceCtlBlk *dcb;
4621 unsigned long flags;
4622 int dev;
4623
4624 seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4625 " Driver Version " DC395X_VERSION "\n");
4626
4627 DC395x_LOCK_IO(acb->scsi_host, flags);
4628
4629 seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4630 seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4631 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4632 seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4633 seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4634 seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4635
4636 seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4637 seq_printf(m, "AdapterID %i\n", host->this_id);
4638
4639 seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4640 /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4641 seq_printf(m, ", FilterCfg 0x%02x",
4642 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4643 seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4644 /*seq_printf(m, "\n"); */
4645
4646 seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4647 seq_printf(m, "Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4648 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4649 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4650 acb->dcb_map[6], acb->dcb_map[7]);
4651 seq_printf(m, " %02x %02x %02x %02x %02x %02x %02x %02x\n",
4652 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4653 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4654 acb->dcb_map[14], acb->dcb_map[15]);
4655
4656 seq_puts(m,
4657 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4658
4659 dev = 0;
4660 list_for_each_entry(dcb, &acb->dcb_list, list) {
4661 int nego_period;
4662 seq_printf(m, "%02i %02i %02i ", dev, dcb->target_id,
4663 dcb->target_lun);
4664 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4665 YESNO(dcb->sync_offset);
4666 YESNO(dcb->sync_period & WIDE_SYNC);
4667 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4668 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4669 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4670 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4671 if (dcb->sync_offset)
4672 seq_printf(m, " %03i ns ", nego_period);
4673 else
4674 seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4675
4676 if (dcb->sync_offset & 0x0f) {
4677 spd = 1000 / (nego_period);
4678 spd1 = 1000 % (nego_period);
4679 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4680 seq_printf(m, " %2i.%1i M %02i ", spd, spd1,
4681 (dcb->sync_offset & 0x0f));
4682 } else
4683 seq_puts(m, " ");
4684
4685 /* Add more info ... */
4686 seq_printf(m, " %02i\n", dcb->max_command);
4687 dev++;
4688 }
4689
4690 if (timer_pending(&acb->waiting_timer))
4691 seq_puts(m, "Waiting queue timer running\n");
4692 else
4693 seq_putc(m, '\n');
4694
4695 list_for_each_entry(dcb, &acb->dcb_list, list) {
4696 struct ScsiReqBlk *srb;
4697 if (!list_empty(&dcb->srb_waiting_list))
4698 seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4699 dcb->target_id, dcb->target_lun,
4700 list_size(&dcb->srb_waiting_list));
4701 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4702 seq_printf(m, " %p", srb->cmd);
4703 if (!list_empty(&dcb->srb_going_list))
4704 seq_printf(m, "\nDCB (%02i-%i): Going : %i:",
4705 dcb->target_id, dcb->target_lun,
4706 list_size(&dcb->srb_going_list));
4707 list_for_each_entry(srb, &dcb->srb_going_list, list)
4708 seq_printf(m, " %p", srb->cmd);
4709 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4710 seq_putc(m, '\n');
4711 }
4712
4713 if (debug_enabled(DBG_1)) {
4714 seq_printf(m, "DCB list for ACB %p:\n", acb);
4715 list_for_each_entry(dcb, &acb->dcb_list, list) {
4716 seq_printf(m, "%p -> ", dcb);
4717 }
4718 seq_puts(m, "END\n");
4719 }
4720
4721 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4722 return 0;
4723 }
4724
4725
4726 static struct scsi_host_template dc395x_driver_template = {
4727 .module = THIS_MODULE,
4728 .proc_name = DC395X_NAME,
4729 .show_info = dc395x_show_info,
4730 .name = DC395X_BANNER " " DC395X_VERSION,
4731 .queuecommand = dc395x_queue_command,
4732 .bios_param = dc395x_bios_param,
4733 .slave_alloc = dc395x_slave_alloc,
4734 .slave_destroy = dc395x_slave_destroy,
4735 .can_queue = DC395x_MAX_CAN_QUEUE,
4736 .this_id = 7,
4737 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4738 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4739 .eh_abort_handler = dc395x_eh_abort,
4740 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4741 .use_clustering = DISABLE_CLUSTERING,
4742 };
4743
4744
4745 /**
4746 * banner_display - Display banner on first instance of driver
4747 * initialized.
4748 **/
4749 static void banner_display(void)
4750 {
4751 static int banner_done = 0;
4752 if (!banner_done)
4753 {
4754 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4755 banner_done = 1;
4756 }
4757 }
4758
4759
4760 /**
4761 * dc395x_init_one - Initialise a single instance of the adapter.
4762 *
4763 * The PCI layer will call this once for each instance of the adapter
4764 * that it finds in the system. The pci_dev strcuture indicates which
4765 * instance we are being called from.
4766 *
4767 * @dev: The PCI device to initialize.
4768 * @id: Looks like a pointer to the entry in our pci device table
4769 * that was actually matched by the PCI subsystem.
4770 *
4771 * Returns 0 on success, or an error code (-ve) on failure.
4772 **/
4773 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4774 {
4775 struct Scsi_Host *scsi_host = NULL;
4776 struct AdapterCtlBlk *acb = NULL;
4777 unsigned long io_port_base;
4778 unsigned int io_port_len;
4779 unsigned int irq;
4780
4781 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4782 banner_display();
4783
4784 if (pci_enable_device(dev))
4785 {
4786 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4787 return -ENODEV;
4788 }
4789 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4790 io_port_len = pci_resource_len(dev, 0);
4791 irq = dev->irq;
4792 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4793
4794 /* allocate scsi host information (includes out adapter) */
4795 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4796 sizeof(struct AdapterCtlBlk));
4797 if (!scsi_host) {
4798 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4799 goto fail;
4800 }
4801 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4802 acb->scsi_host = scsi_host;
4803 acb->dev = dev;
4804
4805 /* initialise the adapter and everything we need */
4806 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4807 dprintkl(KERN_INFO, "adapter init failed\n");
4808 goto fail;
4809 }
4810
4811 pci_set_master(dev);
4812
4813 /* get the scsi mid level to scan for new devices on the bus */
4814 if (scsi_add_host(scsi_host, &dev->dev)) {
4815 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4816 goto fail;
4817 }
4818 pci_set_drvdata(dev, scsi_host);
4819 scsi_scan_host(scsi_host);
4820
4821 return 0;
4822
4823 fail:
4824 if (acb != NULL)
4825 adapter_uninit(acb);
4826 if (scsi_host != NULL)
4827 scsi_host_put(scsi_host);
4828 pci_disable_device(dev);
4829 return -ENODEV;
4830 }
4831
4832
4833 /**
4834 * dc395x_remove_one - Called to remove a single instance of the
4835 * adapter.
4836 *
4837 * @dev: The PCI device to initialize.
4838 **/
4839 static void dc395x_remove_one(struct pci_dev *dev)
4840 {
4841 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4842 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4843
4844 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4845
4846 scsi_remove_host(scsi_host);
4847 adapter_uninit(acb);
4848 pci_disable_device(dev);
4849 scsi_host_put(scsi_host);
4850 }
4851
4852
4853 static struct pci_device_id dc395x_pci_table[] = {
4854 {
4855 .vendor = PCI_VENDOR_ID_TEKRAM,
4856 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4857 .subvendor = PCI_ANY_ID,
4858 .subdevice = PCI_ANY_ID,
4859 },
4860 {} /* Terminating entry */
4861 };
4862 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4863
4864
4865 static struct pci_driver dc395x_driver = {
4866 .name = DC395X_NAME,
4867 .id_table = dc395x_pci_table,
4868 .probe = dc395x_init_one,
4869 .remove = dc395x_remove_one,
4870 };
4871
4872
4873 /**
4874 * dc395x_module_init - Module initialization function
4875 *
4876 * Used by both module and built-in driver to initialise this driver.
4877 **/
4878 static int __init dc395x_module_init(void)
4879 {
4880 return pci_register_driver(&dc395x_driver);
4881 }
4882
4883
4884 /**
4885 * dc395x_module_exit - Module cleanup function.
4886 **/
4887 static void __exit dc395x_module_exit(void)
4888 {
4889 pci_unregister_driver(&dc395x_driver);
4890 }
4891
4892
4893 module_init(dc395x_module_init);
4894 module_exit(dc395x_module_exit);
4895
4896 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4897 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4898 MODULE_LICENSE("GPL");
Linux with added FPC-III support