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vfio/pci: Pull BAR mapping setup from read-write path
[linux/fpc-iii.git] / drivers / scsi / dc395x.c
blob60ef8df42b95c95f671cba4a0d9223161813b20c
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 psge->length -= xferred;
1973 psge->address += xferred;
1974 srb->sg_index = idx;
1975 pci_dma_sync_single_for_device(srb->dcb->
1976 acb->dev,
1977 srb->sg_bus_addr,
1978 SEGMENTX_LEN,
1979 PCI_DMA_TODEVICE);
1980 break;
1981 }
1982 psge++;
1983 }
1984 sg_verify_length(srb);
1985 }
1986
1987
1988 /*
1989 * We have transferred a single byte (PIO mode?) and need to update
1990 * the count of bytes remaining (total_xfer_length) and update the sg
1991 * entry to either point to next byte in the current sg entry, or of
1992 * already at the end to point to the start of the next sg entry
1993 */
1994 static void sg_subtract_one(struct ScsiReqBlk *srb)
1995 {
1996 sg_update_list(srb, srb->total_xfer_length - 1);
1997 }
1998
1999
2000 /*
2001 * cleanup_after_transfer
2002 *
2003 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2004 * KG: Currently called from StatusPhase1 ()
2005 * Should probably also be called from other places
2006 * Best might be to call it in DataXXPhase0, if new phase will differ
2007 */
2008 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2009 struct ScsiReqBlk *srb)
2010 {
2011 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2012 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2013 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2014 clear_fifo(acb, "cleanup/in");
2015 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2016 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2017 } else { /* write */
2018 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2019 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2020 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2021 clear_fifo(acb, "cleanup/out");
2022 }
2023 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2024 }
2025
2026
2027 /*
2028 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
2029 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2030 */
2031 #define DC395x_LASTPIO 4
2032
2033
2034 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2035 u16 *pscsi_status)
2036 {
2037 struct DeviceCtlBlk *dcb = srb->dcb;
2038 u16 scsi_status = *pscsi_status;
2039 u32 d_left_counter = 0;
2040 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
2041 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2042
2043 /*
2044 * KG: We need to drain the buffers before we draw any conclusions!
2045 * This means telling the DMA to push the rest into SCSI, telling
2046 * SCSI to push the rest to the bus.
2047 * However, the device might have been the one to stop us (phase
2048 * change), and the data in transit just needs to be accounted so
2049 * it can be retransmitted.)
2050 */
2051 /*
2052 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2053 * If we need more data, the DMA SG list will be freshly set up, anyway
2054 */
2055 dprintkdbg(DBG_PIO, "data_out_phase0: "
2056 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2057 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2058 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2059 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2060 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2061 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2062 srb->total_xfer_length);
2063 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2064
2065 if (!(srb->state & SRB_XFERPAD)) {
2066 if (scsi_status & PARITYERROR)
2067 srb->status |= PARITY_ERROR;
2068
2069 /*
2070 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2071 * is the no of bytes it got from the DMA engine not the no it
2072 * transferred successfully to the device. (And the difference could
2073 * be as much as the FIFO size, I guess ...)
2074 */
2075 if (!(scsi_status & SCSIXFERDONE)) {
2076 /*
2077 * when data transfer from DMA FIFO to SCSI FIFO
2078 * if there was some data left in SCSI FIFO
2079 */
2080 d_left_counter =
2081 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2082 0x1F);
2083 if (dcb->sync_period & WIDE_SYNC)
2084 d_left_counter <<= 1;
2085
2086 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2087 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2088 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2089 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2090 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2091 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2092 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2093 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2094 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2095 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2096 }
2097 /*
2098 * calculate all the residue data that not yet tranfered
2099 * SCSI transfer counter + left in SCSI FIFO data
2100 *
2101 * .....TRM_S1040_SCSI_COUNTER (24bits)
2102 * The counter always decrement by one for every SCSI byte transfer.
2103 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2104 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2105 */
2106 if (srb->total_xfer_length > DC395x_LASTPIO)
2107 d_left_counter +=
2108 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2109
2110 /* Is this a good idea? */
2111 /*clear_fifo(acb, "DOP1"); */
2112 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2113 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2114 && scsi_bufflen(srb->cmd) % 2) {
2115 d_left_counter = 0;
2116 dprintkl(KERN_INFO,
2117 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2118 scsi_status);
2119 }
2120 /*
2121 * KG: Oops again. Same thinko as above: The SCSI might have been
2122 * faster than the DMA engine, so that it ran out of data.
2123 * In that case, we have to do just nothing!
2124 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2125 */
2126 /*
2127 * KG: This is nonsense: We have been WRITING data to the bus
2128 * If the SCSI engine has no bytes left, how should the DMA engine?
2129 */
2130 if (d_left_counter == 0) {
2131 srb->total_xfer_length = 0;
2132 } else {
2133 /*
2134 * if transfer not yet complete
2135 * there were some data residue in SCSI FIFO or
2136 * SCSI transfer counter not empty
2137 */
2138 long oldxferred =
2139 srb->total_xfer_length - d_left_counter;
2140 const int diff =
2141 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2142 sg_update_list(srb, d_left_counter);
2143 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2144 if ((srb->segment_x[srb->sg_index].length ==
2145 diff && scsi_sg_count(srb->cmd))
2146 || ((oldxferred & ~PAGE_MASK) ==
2147 (PAGE_SIZE - diff))
2148 ) {
2149 dprintkl(KERN_INFO, "data_out_phase0: "
2150 "Work around chip bug (%i)?\n", diff);
2151 d_left_counter =
2152 srb->total_xfer_length - diff;
2153 sg_update_list(srb, d_left_counter);
2154 /*srb->total_xfer_length -= diff; */
2155 /*srb->virt_addr += diff; */
2156 /*if (srb->cmd->use_sg) */
2157 /* srb->sg_index++; */
2158 }
2159 }
2160 }
2161 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2162 cleanup_after_transfer(acb, srb);
2163 }
2164 }
2165
2166
2167 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2168 u16 *pscsi_status)
2169 {
2170 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2171 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2172 clear_fifo(acb, "data_out_phase1");
2173 /* do prepare before transfer when data out phase */
2174 data_io_transfer(acb, srb, XFERDATAOUT);
2175 }
2176
2177 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2178 u16 *pscsi_status)
2179 {
2180 u16 scsi_status = *pscsi_status;
2181
2182 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2183 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2184
2185 /*
2186 * KG: DataIn is much more tricky than DataOut. When the device is finished
2187 * and switches to another phase, the SCSI engine should be finished too.
2188 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2189 * engine and transferred to memory.
2190 * We should wait for the FIFOs to be emptied by that (is there any way to
2191 * enforce this?) and then stop the DMA engine, because it might think, that
2192 * there are more bytes to follow. Yes, the device might disconnect prior to
2193 * having all bytes transferred!
2194 * Also we should make sure that all data from the DMA engine buffer's really
2195 * made its way to the system memory! Some documentation on this would not
2196 * seem to be a bad idea, actually.
2197 */
2198 if (!(srb->state & SRB_XFERPAD)) {
2199 u32 d_left_counter;
2200 unsigned int sc, fc;
2201
2202 if (scsi_status & PARITYERROR) {
2203 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2204 "Parity Error\n", srb->cmd);
2205 srb->status |= PARITY_ERROR;
2206 }
2207 /*
2208 * KG: We should wait for the DMA FIFO to be empty ...
2209 * but: it would be better to wait first for the SCSI FIFO and then the
2210 * the DMA FIFO to become empty? How do we know, that the device not already
2211 * sent data to the FIFO in a MsgIn phase, eg.?
2212 */
2213 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2214 #if 0
2215 int ctr = 6000000;
2216 dprintkl(KERN_DEBUG,
2217 "DIP0: Wait for DMA FIFO to flush ...\n");
2218 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2219 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2220 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2221 while (!
2222 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2223 0x80) && --ctr);
2224 if (ctr < 6000000 - 1)
2225 dprintkl(KERN_DEBUG
2226 "DIP0: Had to wait for DMA ...\n");
2227 if (!ctr)
2228 dprintkl(KERN_ERR,
2229 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2230 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2231 #endif
2232 dprintkdbg(DBG_KG, "data_in_phase0: "
2233 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2234 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2235 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2236 }
2237 /* Now: Check remainig data: The SCSI counters should tell us ... */
2238 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2239 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2240 d_left_counter = sc + ((fc & 0x1f)
2241 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2242 0));
2243 dprintkdbg(DBG_KG, "data_in_phase0: "
2244 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2245 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2246 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2247 fc,
2248 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2249 sc,
2250 fc,
2251 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2252 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2253 srb->total_xfer_length, d_left_counter);
2254 #if DC395x_LASTPIO
2255 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2256 if (d_left_counter
2257 && srb->total_xfer_length <= DC395x_LASTPIO) {
2258 size_t left_io = srb->total_xfer_length;
2259
2260 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2261 /*sg_update_list (srb, d_left_counter); */
2262 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2263 "for remaining %i bytes:",
2264 fc & 0x1f,
2265 (srb->dcb->sync_period & WIDE_SYNC) ?
2266 "words" : "bytes",
2267 srb->total_xfer_length);
2268 if (srb->dcb->sync_period & WIDE_SYNC)
2269 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2270 CFG2_WIDEFIFO);
2271 while (left_io) {
2272 unsigned char *virt, *base = NULL;
2273 unsigned long flags = 0;
2274 size_t len = left_io;
2275 size_t offset = srb->request_length - left_io;
2276
2277 local_irq_save(flags);
2278 /* Assumption: it's inside one page as it's at most 4 bytes and
2279 I just assume it's on a 4-byte boundary */
2280 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2281 srb->sg_count, &offset, &len);
2282 virt = base + offset;
2283
2284 left_io -= len;
2285
2286 while (len) {
2287 u8 byte;
2288 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2289 *virt++ = byte;
2290
2291 if (debug_enabled(DBG_PIO))
2292 printk(" %02x", byte);
2293
2294 d_left_counter--;
2295 sg_subtract_one(srb);
2296
2297 len--;
2298
2299 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2300
2301 if (fc == 0x40) {
2302 left_io = 0;
2303 break;
2304 }
2305 }
2306
2307 WARN_ON((fc != 0x40) == !d_left_counter);
2308
2309 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2310 /* Read the last byte ... */
2311 if (srb->total_xfer_length > 0) {
2312 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2313
2314 *virt++ = byte;
2315 srb->total_xfer_length--;
2316 if (debug_enabled(DBG_PIO))
2317 printk(" %02x", byte);
2318 }
2319
2320 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2321 }
2322
2323 scsi_kunmap_atomic_sg(base);
2324 local_irq_restore(flags);
2325 }
2326 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2327 /*srb->total_xfer_length = 0; */
2328 if (debug_enabled(DBG_PIO))
2329 printk("\n");
2330 }
2331 #endif /* DC395x_LASTPIO */
2332
2333 #if 0
2334 /*
2335 * KG: This was in DATAOUT. Does it also belong here?
2336 * Nobody seems to know what counter and fifo_cnt count exactly ...
2337 */
2338 if (!(scsi_status & SCSIXFERDONE)) {
2339 /*
2340 * when data transfer from DMA FIFO to SCSI FIFO
2341 * if there was some data left in SCSI FIFO
2342 */
2343 d_left_counter =
2344 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2345 0x1F);
2346 if (srb->dcb->sync_period & WIDE_SYNC)
2347 d_left_counter <<= 1;
2348 /*
2349 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2350 * so need to *= 2
2351 * KG: Seems to be correct ...
2352 */
2353 }
2354 #endif
2355 /* KG: This should not be needed any more! */
2356 if (d_left_counter == 0
2357 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2358 #if 0
2359 int ctr = 6000000;
2360 u8 TempDMAstatus;
2361 do {
2362 TempDMAstatus =
2363 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2364 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2365 if (!ctr)
2366 dprintkl(KERN_ERR,
2367 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2368 srb->total_xfer_length = 0;
2369 #endif
2370 srb->total_xfer_length = d_left_counter;
2371 } else { /* phase changed */
2372 /*
2373 * parsing the case:
2374 * when a transfer not yet complete
2375 * but be disconnected by target
2376 * if transfer not yet complete
2377 * there were some data residue in SCSI FIFO or
2378 * SCSI transfer counter not empty
2379 */
2380 sg_update_list(srb, d_left_counter);
2381 }
2382 }
2383 /* KG: The target may decide to disconnect: Empty FIFO before! */
2384 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2385 cleanup_after_transfer(acb, srb);
2386 }
2387 }
2388
2389
2390 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2391 u16 *pscsi_status)
2392 {
2393 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2394 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2395 data_io_transfer(acb, srb, XFERDATAIN);
2396 }
2397
2398
2399 static void data_io_transfer(struct AdapterCtlBlk *acb,
2400 struct ScsiReqBlk *srb, u16 io_dir)
2401 {
2402 struct DeviceCtlBlk *dcb = srb->dcb;
2403 u8 bval;
2404 dprintkdbg(DBG_0,
2405 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2406 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2407 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2408 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2409 if (srb == acb->tmp_srb)
2410 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2411 if (srb->sg_index >= srb->sg_count) {
2412 /* can't happen? out of bounds error */
2413 return;
2414 }
2415
2416 if (srb->total_xfer_length > DC395x_LASTPIO) {
2417 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2418 /*
2419 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2420 * Maybe, even ABORTXFER would be appropriate
2421 */
2422 if (dma_status & XFERPENDING) {
2423 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2424 "Expect trouble!\n");
2425 dump_register_info(acb, dcb, srb);
2426 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2427 }
2428 /* clear_fifo(acb, "IO"); */
2429 /*
2430 * load what physical address of Scatter/Gather list table
2431 * want to be transfer
2432 */
2433 srb->state |= SRB_DATA_XFER;
2434 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2435 if (scsi_sg_count(srb->cmd)) { /* with S/G */
2436 io_dir |= DMACMD_SG;
2437 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2438 srb->sg_bus_addr +
2439 sizeof(struct SGentry) *
2440 srb->sg_index);
2441 /* load how many bytes in the sg list table */
2442 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2443 ((u32)(srb->sg_count -
2444 srb->sg_index) << 3));
2445 } else { /* without S/G */
2446 io_dir &= ~DMACMD_SG;
2447 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2448 srb->segment_x[0].address);
2449 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2450 srb->segment_x[0].length);
2451 }
2452 /* load total transfer length (24bits) max value 16Mbyte */
2453 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2454 srb->total_xfer_length);
2455 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2456 if (io_dir & DMACMD_DIR) { /* read */
2457 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2458 SCMD_DMA_IN);
2459 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2460 } else {
2461 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2462 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2463 SCMD_DMA_OUT);
2464 }
2465
2466 }
2467 #if DC395x_LASTPIO
2468 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2469 /*
2470 * load what physical address of Scatter/Gather list table
2471 * want to be transfer
2472 */
2473 srb->state |= SRB_DATA_XFER;
2474 /* load total transfer length (24bits) max value 16Mbyte */
2475 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2476 srb->total_xfer_length);
2477 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2478 if (io_dir & DMACMD_DIR) { /* read */
2479 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2480 SCMD_FIFO_IN);
2481 } else { /* write */
2482 int ln = srb->total_xfer_length;
2483 size_t left_io = srb->total_xfer_length;
2484
2485 if (srb->dcb->sync_period & WIDE_SYNC)
2486 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2487 CFG2_WIDEFIFO);
2488
2489 while (left_io) {
2490 unsigned char *virt, *base = NULL;
2491 unsigned long flags = 0;
2492 size_t len = left_io;
2493 size_t offset = srb->request_length - left_io;
2494
2495 local_irq_save(flags);
2496 /* Again, max 4 bytes */
2497 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2498 srb->sg_count, &offset, &len);
2499 virt = base + offset;
2500
2501 left_io -= len;
2502
2503 while (len--) {
2504 if (debug_enabled(DBG_PIO))
2505 printk(" %02x", *virt);
2506
2507 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2508
2509 sg_subtract_one(srb);
2510 }
2511
2512 scsi_kunmap_atomic_sg(base);
2513 local_irq_restore(flags);
2514 }
2515 if (srb->dcb->sync_period & WIDE_SYNC) {
2516 if (ln % 2) {
2517 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2518 if (debug_enabled(DBG_PIO))
2519 printk(" |00");
2520 }
2521 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2522 }
2523 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2524 if (debug_enabled(DBG_PIO))
2525 printk("\n");
2526 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2527 SCMD_FIFO_OUT);
2528 }
2529 }
2530 #endif /* DC395x_LASTPIO */
2531 else { /* xfer pad */
2532 u8 data = 0, data2 = 0;
2533 if (srb->sg_count) {
2534 srb->adapter_status = H_OVER_UNDER_RUN;
2535 srb->status |= OVER_RUN;
2536 }
2537 /*
2538 * KG: despite the fact that we are using 16 bits I/O ops
2539 * the SCSI FIFO is only 8 bits according to the docs
2540 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2541 */
2542 if (dcb->sync_period & WIDE_SYNC) {
2543 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2544 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2545 CFG2_WIDEFIFO);
2546 if (io_dir & DMACMD_DIR) {
2547 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2548 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2549 } else {
2550 /* Danger, Robinson: If you find KGs
2551 * scattered over the wide disk, the driver
2552 * or chip is to blame :-( */
2553 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2554 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2555 }
2556 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2557 } else {
2558 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2559 /* Danger, Robinson: If you find a collection of Ks on your disk
2560 * something broke :-( */
2561 if (io_dir & DMACMD_DIR)
2562 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2563 else
2564 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2565 }
2566 srb->state |= SRB_XFERPAD;
2567 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2568 /* SCSI command */
2569 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2570 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2571 }
2572 }
2573
2574
2575 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2576 u16 *pscsi_status)
2577 {
2578 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2579 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2580 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2581 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2582 srb->state = SRB_COMPLETED;
2583 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2584 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2585 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2586 }
2587
2588
2589 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2590 u16 *pscsi_status)
2591 {
2592 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2593 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2594 srb->state = SRB_STATUS;
2595 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2596 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2597 }
2598
2599
2600 /* Check if the message is complete */
2601 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2602 {
2603 if (*msgbuf == EXTENDED_MESSAGE) {
2604 if (len < 2)
2605 return 0;
2606 if (len < msgbuf[1] + 2)
2607 return 0;
2608 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2609 if (len < 2)
2610 return 0;
2611 return 1;
2612 }
2613
2614 /* reject_msg */
2615 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2616 struct ScsiReqBlk *srb)
2617 {
2618 srb->msgout_buf[0] = MESSAGE_REJECT;
2619 srb->msg_count = 1;
2620 DC395x_ENABLE_MSGOUT;
2621 srb->state &= ~SRB_MSGIN;
2622 srb->state |= SRB_MSGOUT;
2623 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2624 srb->msgin_buf[0],
2625 srb->dcb->target_id, srb->dcb->target_lun);
2626 }
2627
2628
2629 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2630 struct DeviceCtlBlk *dcb, u8 tag)
2631 {
2632 struct ScsiReqBlk *srb = NULL;
2633 struct ScsiReqBlk *i;
2634 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2635 srb->cmd, tag, srb);
2636
2637 if (!(dcb->tag_mask & (1 << tag)))
2638 dprintkl(KERN_DEBUG,
2639 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2640 dcb->tag_mask, tag);
2641
2642 if (list_empty(&dcb->srb_going_list))
2643 goto mingx0;
2644 list_for_each_entry(i, &dcb->srb_going_list, list) {
2645 if (i->tag_number == tag) {
2646 srb = i;
2647 break;
2648 }
2649 }
2650 if (!srb)
2651 goto mingx0;
2652
2653 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2654 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2655 if (dcb->flag & ABORT_DEV_) {
2656 /*srb->state = SRB_ABORT_SENT; */
2657 enable_msgout_abort(acb, srb);
2658 }
2659
2660 if (!(srb->state & SRB_DISCONNECT))
2661 goto mingx0;
2662
2663 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2664 srb->state |= dcb->active_srb->state;
2665 srb->state |= SRB_DATA_XFER;
2666 dcb->active_srb = srb;
2667 /* How can we make the DORS happy? */
2668 return srb;
2669
2670 mingx0:
2671 srb = acb->tmp_srb;
2672 srb->state = SRB_UNEXPECT_RESEL;
2673 dcb->active_srb = srb;
2674 srb->msgout_buf[0] = MSG_ABORT_TAG;
2675 srb->msg_count = 1;
2676 DC395x_ENABLE_MSGOUT;
2677 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2678 return srb;
2679 }
2680
2681
2682 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2683 struct DeviceCtlBlk *dcb)
2684 {
2685 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2686 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2687 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2688 set_xfer_rate(acb, dcb);
2689 }
2690
2691
2692 /* set async transfer mode */
2693 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2694 {
2695 struct DeviceCtlBlk *dcb = srb->dcb;
2696 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2697 dcb->target_id, dcb->target_lun);
2698
2699 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2700 dcb->sync_mode |= SYNC_NEGO_DONE;
2701 /*dcb->sync_period &= 0; */
2702 dcb->sync_offset = 0;
2703 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2704 srb->state &= ~SRB_DO_SYNC_NEGO;
2705 reprogram_regs(acb, dcb);
2706 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2707 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2708 build_wdtr(acb, dcb, srb);
2709 DC395x_ENABLE_MSGOUT;
2710 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2711 }
2712 }
2713
2714
2715 /* set sync transfer mode */
2716 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2717 {
2718 struct DeviceCtlBlk *dcb = srb->dcb;
2719 u8 bval;
2720 int fact;
2721 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2722 "(%02i.%01i MHz) Offset %i\n",
2723 dcb->target_id, srb->msgin_buf[3] << 2,
2724 (250 / srb->msgin_buf[3]),
2725 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2726 srb->msgin_buf[4]);
2727
2728 if (srb->msgin_buf[4] > 15)
2729 srb->msgin_buf[4] = 15;
2730 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2731 dcb->sync_offset = 0;
2732 else if (dcb->sync_offset == 0)
2733 dcb->sync_offset = srb->msgin_buf[4];
2734 if (srb->msgin_buf[4] > dcb->sync_offset)
2735 srb->msgin_buf[4] = dcb->sync_offset;
2736 else
2737 dcb->sync_offset = srb->msgin_buf[4];
2738 bval = 0;
2739 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2740 || dcb->min_nego_period >
2741 clock_period[bval]))
2742 bval++;
2743 if (srb->msgin_buf[3] < clock_period[bval])
2744 dprintkl(KERN_INFO,
2745 "msgin_set_sync: Increase sync nego period to %ins\n",
2746 clock_period[bval] << 2);
2747 srb->msgin_buf[3] = clock_period[bval];
2748 dcb->sync_period &= 0xf0;
2749 dcb->sync_period |= ALT_SYNC | bval;
2750 dcb->min_nego_period = srb->msgin_buf[3];
2751
2752 if (dcb->sync_period & WIDE_SYNC)
2753 fact = 500;
2754 else
2755 fact = 250;
2756
2757 dprintkl(KERN_INFO,
2758 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2759 dcb->target_id, (fact == 500) ? "Wide16" : "",
2760 dcb->min_nego_period << 2, dcb->sync_offset,
2761 (fact / dcb->min_nego_period),
2762 ((fact % dcb->min_nego_period) * 10 +
2763 dcb->min_nego_period / 2) / dcb->min_nego_period);
2764
2765 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2766 /* Reply with corrected SDTR Message */
2767 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2768 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2769
2770 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2771 srb->msg_count = 5;
2772 DC395x_ENABLE_MSGOUT;
2773 dcb->sync_mode |= SYNC_NEGO_DONE;
2774 } else {
2775 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2776 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2777 build_wdtr(acb, dcb, srb);
2778 DC395x_ENABLE_MSGOUT;
2779 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2780 }
2781 }
2782 srb->state &= ~SRB_DO_SYNC_NEGO;
2783 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2784
2785 reprogram_regs(acb, dcb);
2786 }
2787
2788
2789 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2790 struct ScsiReqBlk *srb)
2791 {
2792 struct DeviceCtlBlk *dcb = srb->dcb;
2793 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2794
2795 dcb->sync_period &= ~WIDE_SYNC;
2796 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2797 dcb->sync_mode |= WIDE_NEGO_DONE;
2798 srb->state &= ~SRB_DO_WIDE_NEGO;
2799 reprogram_regs(acb, dcb);
2800 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2801 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2802 build_sdtr(acb, dcb, srb);
2803 DC395x_ENABLE_MSGOUT;
2804 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2805 }
2806 }
2807
2808 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2809 {
2810 struct DeviceCtlBlk *dcb = srb->dcb;
2811 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2812 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2813 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2814
2815 if (srb->msgin_buf[3] > wide)
2816 srb->msgin_buf[3] = wide;
2817 /* Completed */
2818 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2819 dprintkl(KERN_DEBUG,
2820 "msgin_set_wide: Wide nego initiated <%02i>\n",
2821 dcb->target_id);
2822 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2823 srb->msg_count = 4;
2824 srb->state |= SRB_DO_WIDE_NEGO;
2825 DC395x_ENABLE_MSGOUT;
2826 }
2827
2828 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2829 if (srb->msgin_buf[3] > 0)
2830 dcb->sync_period |= WIDE_SYNC;
2831 else
2832 dcb->sync_period &= ~WIDE_SYNC;
2833 srb->state &= ~SRB_DO_WIDE_NEGO;
2834 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2835 dprintkdbg(DBG_1,
2836 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2837 (8 << srb->msgin_buf[3]), dcb->target_id);
2838 reprogram_regs(acb, dcb);
2839 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2840 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2841 build_sdtr(acb, dcb, srb);
2842 DC395x_ENABLE_MSGOUT;
2843 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2844 }
2845 }
2846
2847
2848 /*
2849 * extended message codes:
2850 *
2851 * code description
2852 *
2853 * 02h Reserved
2854 * 00h MODIFY DATA POINTER
2855 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2856 * 03h WIDE DATA TRANSFER REQUEST
2857 * 04h - 7Fh Reserved
2858 * 80h - FFh Vendor specific
2859 */
2860 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2861 u16 *pscsi_status)
2862 {
2863 struct DeviceCtlBlk *dcb = acb->active_dcb;
2864 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2865
2866 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2867 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2868 /* Now eval the msg */
2869 switch (srb->msgin_buf[0]) {
2870 case DISCONNECT:
2871 srb->state = SRB_DISCONNECT;
2872 break;
2873
2874 case SIMPLE_QUEUE_TAG:
2875 case HEAD_OF_QUEUE_TAG:
2876 case ORDERED_QUEUE_TAG:
2877 srb =
2878 msgin_qtag(acb, dcb,
2879 srb->msgin_buf[1]);
2880 break;
2881
2882 case MESSAGE_REJECT:
2883 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2884 DO_CLRATN | DO_DATALATCH);
2885 /* A sync nego message was rejected ! */
2886 if (srb->state & SRB_DO_SYNC_NEGO) {
2887 msgin_set_async(acb, srb);
2888 break;
2889 }
2890 /* A wide nego message was rejected ! */
2891 if (srb->state & SRB_DO_WIDE_NEGO) {
2892 msgin_set_nowide(acb, srb);
2893 break;
2894 }
2895 enable_msgout_abort(acb, srb);
2896 /*srb->state |= SRB_ABORT_SENT */
2897 break;
2898
2899 case EXTENDED_MESSAGE:
2900 /* SDTR */
2901 if (srb->msgin_buf[1] == 3
2902 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2903 msgin_set_sync(acb, srb);
2904 break;
2905 }
2906 /* WDTR */
2907 if (srb->msgin_buf[1] == 2
2908 && srb->msgin_buf[2] == EXTENDED_WDTR
2909 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2910 msgin_set_wide(acb, srb);
2911 break;
2912 }
2913 msgin_reject(acb, srb);
2914 break;
2915
2916 case MSG_IGNOREWIDE:
2917 /* Discard wide residual */
2918 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2919 break;
2920
2921 case COMMAND_COMPLETE:
2922 /* nothing has to be done */
2923 break;
2924
2925 case SAVE_POINTERS:
2926 /*
2927 * SAVE POINTER may be ignored as we have the struct
2928 * ScsiReqBlk* associated with the scsi command.
2929 */
2930 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2931 "SAVE POINTER rem=%i Ignore\n",
2932 srb->cmd, srb->total_xfer_length);
2933 break;
2934
2935 case RESTORE_POINTERS:
2936 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2937 break;
2938
2939 case ABORT:
2940 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2941 "<%02i-%i> ABORT msg\n",
2942 srb->cmd, dcb->target_id,
2943 dcb->target_lun);
2944 dcb->flag |= ABORT_DEV_;
2945 enable_msgout_abort(acb, srb);
2946 break;
2947
2948 default:
2949 /* reject unknown messages */
2950 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2951 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2952 srb->msg_count = 1;
2953 srb->msgout_buf[0] = dcb->identify_msg;
2954 DC395x_ENABLE_MSGOUT;
2955 srb->state |= SRB_MSGOUT;
2956 /*break; */
2957 }
2958 msgin_reject(acb, srb);
2959 }
2960
2961 /* Clear counter and MsgIn state */
2962 srb->state &= ~SRB_MSGIN;
2963 acb->msg_len = 0;
2964 }
2965 *pscsi_status = PH_BUS_FREE;
2966 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2967 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2968 }
2969
2970
2971 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2972 u16 *pscsi_status)
2973 {
2974 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2975 clear_fifo(acb, "msgin_phase1");
2976 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2977 if (!(srb->state & SRB_MSGIN)) {
2978 srb->state &= ~SRB_DISCONNECT;
2979 srb->state |= SRB_MSGIN;
2980 }
2981 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2982 /* SCSI command */
2983 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2984 }
2985
2986
2987 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2988 u16 *pscsi_status)
2989 {
2990 }
2991
2992
2993 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2994 u16 *pscsi_status)
2995 {
2996 }
2997
2998
2999 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3000 {
3001 struct DeviceCtlBlk *i;
3002
3003 /* set all lun device's period, offset */
3004 if (dcb->identify_msg & 0x07)
3005 return;
3006
3007 if (acb->scan_devices) {
3008 current_sync_offset = dcb->sync_offset;
3009 return;
3010 }
3011
3012 list_for_each_entry(i, &acb->dcb_list, list)
3013 if (i->target_id == dcb->target_id) {
3014 i->sync_period = dcb->sync_period;
3015 i->sync_offset = dcb->sync_offset;
3016 i->sync_mode = dcb->sync_mode;
3017 i->min_nego_period = dcb->min_nego_period;
3018 }
3019 }
3020
3021
3022 static void disconnect(struct AdapterCtlBlk *acb)
3023 {
3024 struct DeviceCtlBlk *dcb = acb->active_dcb;
3025 struct ScsiReqBlk *srb;
3026
3027 if (!dcb) {
3028 dprintkl(KERN_ERR, "disconnect: No such device\n");
3029 udelay(500);
3030 /* Suspend queue for a while */
3031 acb->last_reset =
3032 jiffies + HZ / 2 +
3033 HZ * acb->eeprom.delay_time;
3034 clear_fifo(acb, "disconnectEx");
3035 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3036 return;
3037 }
3038 srb = dcb->active_srb;
3039 acb->active_dcb = NULL;
3040 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
3041
3042 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3043 clear_fifo(acb, "disconnect");
3044 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3045 if (srb->state & SRB_UNEXPECT_RESEL) {
3046 dprintkl(KERN_ERR,
3047 "disconnect: Unexpected reselection <%02i-%i>\n",
3048 dcb->target_id, dcb->target_lun);
3049 srb->state = 0;
3050 waiting_process_next(acb);
3051 } else if (srb->state & SRB_ABORT_SENT) {
3052 dcb->flag &= ~ABORT_DEV_;
3053 acb->last_reset = jiffies + HZ / 2 + 1;
3054 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3055 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3056 waiting_process_next(acb);
3057 } else {
3058 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3059 || !(srb->
3060 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3061 /*
3062 * Selection time out
3063 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3064 */
3065 /* Unexp. Disc / Sel Timeout */
3066 if (srb->state != SRB_START_
3067 && srb->state != SRB_MSGOUT) {
3068 srb->state = SRB_READY;
3069 dprintkl(KERN_DEBUG,
3070 "disconnect: (0x%p) Unexpected\n",
3071 srb->cmd);
3072 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3073 goto disc1;
3074 } else {
3075 /* Normal selection timeout */
3076 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
3077 "<%02i-%i> SelTO\n", srb->cmd,
3078 dcb->target_id, dcb->target_lun);
3079 if (srb->retry_count++ > DC395x_MAX_RETRIES
3080 || acb->scan_devices) {
3081 srb->target_status =
3082 SCSI_STAT_SEL_TIMEOUT;
3083 goto disc1;
3084 }
3085 free_tag(dcb, srb);
3086 srb_going_to_waiting_move(dcb, srb);
3087 dprintkdbg(DBG_KG,
3088 "disconnect: (0x%p) Retry\n",
3089 srb->cmd);
3090 waiting_set_timer(acb, HZ / 20);
3091 }
3092 } else if (srb->state & SRB_DISCONNECT) {
3093 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3094 /*
3095 * SRB_DISCONNECT (This is what we expect!)
3096 */
3097 if (bval & 0x40) {
3098 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3099 " 0x%02x: ACK set! Other controllers?\n",
3100 bval);
3101 /* It could come from another initiator, therefore don't do much ! */
3102 } else
3103 waiting_process_next(acb);
3104 } else if (srb->state & SRB_COMPLETED) {
3105 disc1:
3106 /*
3107 ** SRB_COMPLETED
3108 */
3109 free_tag(dcb, srb);
3110 dcb->active_srb = NULL;
3111 srb->state = SRB_FREE;
3112 srb_done(acb, dcb, srb);
3113 }
3114 }
3115 }
3116
3117
3118 static void reselect(struct AdapterCtlBlk *acb)
3119 {
3120 struct DeviceCtlBlk *dcb = acb->active_dcb;
3121 struct ScsiReqBlk *srb = NULL;
3122 u16 rsel_tar_lun_id;
3123 u8 id, lun;
3124 u8 arblostflag = 0;
3125 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3126
3127 clear_fifo(acb, "reselect");
3128 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3129 /* Read Reselected Target ID and LUN */
3130 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3131 if (dcb) { /* Arbitration lost but Reselection win */
3132 srb = dcb->active_srb;
3133 if (!srb) {
3134 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3135 "but active_srb == NULL\n");
3136 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3137 return;
3138 }
3139 /* Why the if ? */
3140 if (!acb->scan_devices) {
3141 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3142 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3143 srb->cmd, dcb->target_id,
3144 dcb->target_lun, rsel_tar_lun_id,
3145 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3146 arblostflag = 1;
3147 /*srb->state |= SRB_DISCONNECT; */
3148
3149 srb->state = SRB_READY;
3150 free_tag(dcb, srb);
3151 srb_going_to_waiting_move(dcb, srb);
3152 waiting_set_timer(acb, HZ / 20);
3153
3154 /* return; */
3155 }
3156 }
3157 /* Read Reselected Target Id and LUN */
3158 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3159 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3160 "Got %i!\n", rsel_tar_lun_id);
3161 id = rsel_tar_lun_id & 0xff;
3162 lun = (rsel_tar_lun_id >> 8) & 7;
3163 dcb = find_dcb(acb, id, lun);
3164 if (!dcb) {
3165 dprintkl(KERN_ERR, "reselect: From non existent device "
3166 "<%02i-%i>\n", id, lun);
3167 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3168 return;
3169 }
3170 acb->active_dcb = dcb;
3171
3172 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3173 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3174 "disconnection? <%02i-%i>\n",
3175 dcb->target_id, dcb->target_lun);
3176
3177 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3178 srb = acb->tmp_srb;
3179 dcb->active_srb = srb;
3180 } else {
3181 /* There can be only one! */
3182 srb = dcb->active_srb;
3183 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3184 /*
3185 * abort command
3186 */
3187 dprintkl(KERN_DEBUG,
3188 "reselect: w/o disconnected cmds <%02i-%i>\n",
3189 dcb->target_id, dcb->target_lun);
3190 srb = acb->tmp_srb;
3191 srb->state = SRB_UNEXPECT_RESEL;
3192 dcb->active_srb = srb;
3193 enable_msgout_abort(acb, srb);
3194 } else {
3195 if (dcb->flag & ABORT_DEV_) {
3196 /*srb->state = SRB_ABORT_SENT; */
3197 enable_msgout_abort(acb, srb);
3198 } else
3199 srb->state = SRB_DATA_XFER;
3200
3201 }
3202 }
3203 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3204
3205 /* Program HA ID, target ID, period and offset */
3206 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3207 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3208 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3209 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3210 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3211 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3212 /* SCSI command */
3213 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3214 }
3215
3216
3217 static inline u8 tagq_blacklist(char *name)
3218 {
3219 #ifndef DC395x_NO_TAGQ
3220 #if 0
3221 u8 i;
3222 for (i = 0; i < BADDEVCNT; i++)
3223 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3224 return 1;
3225 #endif
3226 return 0;
3227 #else
3228 return 1;
3229 #endif
3230 }
3231
3232
3233 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3234 {
3235 /* Check for SCSI format (ANSI and Response data format) */
3236 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3237 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3238 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3239 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3240 /* ((dcb->dev_type == TYPE_DISK)
3241 || (dcb->dev_type == TYPE_MOD)) && */
3242 !tagq_blacklist(((char *)ptr) + 8)) {
3243 if (dcb->max_command == 1)
3244 dcb->max_command =
3245 dcb->acb->tag_max_num;
3246 dcb->sync_mode |= EN_TAG_QUEUEING;
3247 /*dcb->tag_mask = 0; */
3248 } else
3249 dcb->max_command = 1;
3250 }
3251 }
3252
3253
3254 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3255 struct ScsiInqData *ptr)
3256 {
3257 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3258 dcb->dev_type = bval1;
3259 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3260 disc_tagq_set(dcb, ptr);
3261 }
3262
3263
3264 /* unmap mapped pci regions from SRB */
3265 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3266 {
3267 struct scsi_cmnd *cmd = srb->cmd;
3268 enum dma_data_direction dir = cmd->sc_data_direction;
3269
3270 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3271 /* unmap DC395x SG list */
3272 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3273 srb->sg_bus_addr, SEGMENTX_LEN);
3274 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3275 SEGMENTX_LEN,
3276 PCI_DMA_TODEVICE);
3277 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3278 scsi_sg_count(cmd), scsi_bufflen(cmd));
3279 /* unmap the sg segments */
3280 scsi_dma_unmap(cmd);
3281 }
3282 }
3283
3284
3285 /* unmap mapped pci sense buffer from SRB */
3286 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3287 struct ScsiReqBlk *srb)
3288 {
3289 if (!(srb->flag & AUTO_REQSENSE))
3290 return;
3291 /* Unmap sense buffer */
3292 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3293 srb->segment_x[0].address);
3294 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3295 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3296 /* Restore SG stuff */
3297 srb->total_xfer_length = srb->xferred;
3298 srb->segment_x[0].address =
3299 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3300 srb->segment_x[0].length =
3301 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3302 }
3303
3304
3305 /*
3306 * Complete execution of a SCSI command
3307 * Signal completion to the generic SCSI driver
3308 */
3309 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3310 struct ScsiReqBlk *srb)
3311 {
3312 u8 tempcnt, status;
3313 struct scsi_cmnd *cmd = srb->cmd;
3314 enum dma_data_direction dir = cmd->sc_data_direction;
3315 int ckc_only = 1;
3316
3317 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3318 srb->cmd->device->id, (u8)srb->cmd->device->lun);
3319 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3320 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3321 scsi_sgtalbe(cmd));
3322 status = srb->target_status;
3323 if (srb->flag & AUTO_REQSENSE) {
3324 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3325 pci_unmap_srb_sense(acb, srb);
3326 /*
3327 ** target status..........................
3328 */
3329 srb->flag &= ~AUTO_REQSENSE;
3330 srb->adapter_status = 0;
3331 srb->target_status = CHECK_CONDITION << 1;
3332 if (debug_enabled(DBG_1)) {
3333 switch (cmd->sense_buffer[2] & 0x0f) {
3334 case NOT_READY:
3335 dprintkl(KERN_DEBUG,
3336 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3337 cmd->cmnd[0], dcb->target_id,
3338 dcb->target_lun, status, acb->scan_devices);
3339 break;
3340 case UNIT_ATTENTION:
3341 dprintkl(KERN_DEBUG,
3342 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3343 cmd->cmnd[0], dcb->target_id,
3344 dcb->target_lun, status, acb->scan_devices);
3345 break;
3346 case ILLEGAL_REQUEST:
3347 dprintkl(KERN_DEBUG,
3348 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3349 cmd->cmnd[0], dcb->target_id,
3350 dcb->target_lun, status, acb->scan_devices);
3351 break;
3352 case MEDIUM_ERROR:
3353 dprintkl(KERN_DEBUG,
3354 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3355 cmd->cmnd[0], dcb->target_id,
3356 dcb->target_lun, status, acb->scan_devices);
3357 break;
3358 case HARDWARE_ERROR:
3359 dprintkl(KERN_DEBUG,
3360 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3361 cmd->cmnd[0], dcb->target_id,
3362 dcb->target_lun, status, acb->scan_devices);
3363 break;
3364 }
3365 if (cmd->sense_buffer[7] >= 6)
3366 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3367 "(0x%08x 0x%08x)\n",
3368 cmd->sense_buffer[2], cmd->sense_buffer[12],
3369 cmd->sense_buffer[13],
3370 *((unsigned int *)(cmd->sense_buffer + 3)),
3371 *((unsigned int *)(cmd->sense_buffer + 8)));
3372 else
3373 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3374 cmd->sense_buffer[2],
3375 *((unsigned int *)(cmd->sense_buffer + 3)));
3376 }
3377
3378 if (status == (CHECK_CONDITION << 1)) {
3379 cmd->result = DID_BAD_TARGET << 16;
3380 goto ckc_e;
3381 }
3382 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3383
3384 if (srb->total_xfer_length
3385 && srb->total_xfer_length >= cmd->underflow)
3386 cmd->result =
3387 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3388 srb->end_message, CHECK_CONDITION);
3389 /*SET_RES_DID(cmd->result,DID_OK) */
3390 else
3391 cmd->result =
3392 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3393 srb->end_message, CHECK_CONDITION);
3394
3395 goto ckc_e;
3396 }
3397
3398 /*************************************************************/
3399 if (status) {
3400 /*
3401 * target status..........................
3402 */
3403 if (status_byte(status) == CHECK_CONDITION) {
3404 request_sense(acb, dcb, srb);
3405 return;
3406 } else if (status_byte(status) == QUEUE_FULL) {
3407 tempcnt = (u8)list_size(&dcb->srb_going_list);
3408 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3409 dcb->target_id, dcb->target_lun, tempcnt);
3410 if (tempcnt > 1)
3411 tempcnt--;
3412 dcb->max_command = tempcnt;
3413 free_tag(dcb, srb);
3414 srb_going_to_waiting_move(dcb, srb);
3415 waiting_set_timer(acb, HZ / 20);
3416 srb->adapter_status = 0;
3417 srb->target_status = 0;
3418 return;
3419 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3420 srb->adapter_status = H_SEL_TIMEOUT;
3421 srb->target_status = 0;
3422 cmd->result = DID_NO_CONNECT << 16;
3423 } else {
3424 srb->adapter_status = 0;
3425 SET_RES_DID(cmd->result, DID_ERROR);
3426 SET_RES_MSG(cmd->result, srb->end_message);
3427 SET_RES_TARGET(cmd->result, status);
3428
3429 }
3430 } else {
3431 /*
3432 ** process initiator status..........................
3433 */
3434 status = srb->adapter_status;
3435 if (status & H_OVER_UNDER_RUN) {
3436 srb->target_status = 0;
3437 SET_RES_DID(cmd->result, DID_OK);
3438 SET_RES_MSG(cmd->result, srb->end_message);
3439 } else if (srb->status & PARITY_ERROR) {
3440 SET_RES_DID(cmd->result, DID_PARITY);
3441 SET_RES_MSG(cmd->result, srb->end_message);
3442 } else { /* No error */
3443
3444 srb->adapter_status = 0;
3445 srb->target_status = 0;
3446 SET_RES_DID(cmd->result, DID_OK);
3447 }
3448 }
3449
3450 if (dir != PCI_DMA_NONE && scsi_sg_count(cmd))
3451 pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd),
3452 scsi_sg_count(cmd), dir);
3453
3454 ckc_only = 0;
3455 /* Check Error Conditions */
3456 ckc_e:
3457
3458 if (cmd->cmnd[0] == INQUIRY) {
3459 unsigned char *base = NULL;
3460 struct ScsiInqData *ptr;
3461 unsigned long flags = 0;
3462 struct scatterlist* sg = scsi_sglist(cmd);
3463 size_t offset = 0, len = sizeof(struct ScsiInqData);
3464
3465 local_irq_save(flags);
3466 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3467 ptr = (struct ScsiInqData *)(base + offset);
3468
3469 if (!ckc_only && (cmd->result & RES_DID) == 0
3470 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3471 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3472 dcb->inquiry7 = ptr->Flags;
3473
3474 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3475 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3476 if ((cmd->result == (DID_OK << 16)
3477 || status_byte(cmd->result) &
3478 CHECK_CONDITION)) {
3479 if (!dcb->init_tcq_flag) {
3480 add_dev(acb, dcb, ptr);
3481 dcb->init_tcq_flag = 1;
3482 }
3483 }
3484
3485 scsi_kunmap_atomic_sg(base);
3486 local_irq_restore(flags);
3487 }
3488
3489 /* Here is the info for Doug Gilbert's sg3 ... */
3490 scsi_set_resid(cmd, srb->total_xfer_length);
3491 /* This may be interpreted by sb. or not ... */
3492 cmd->SCp.this_residual = srb->total_xfer_length;
3493 cmd->SCp.buffers_residual = 0;
3494 if (debug_enabled(DBG_KG)) {
3495 if (srb->total_xfer_length)
3496 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3497 "cmnd=0x%02x Missed %i bytes\n",
3498 cmd, cmd->device->id, (u8)cmd->device->lun,
3499 cmd->cmnd[0], srb->total_xfer_length);
3500 }
3501
3502 srb_going_remove(dcb, srb);
3503 /* Add to free list */
3504 if (srb == acb->tmp_srb)
3505 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3506 else {
3507 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3508 cmd, cmd->result);
3509 srb_free_insert(acb, srb);
3510 }
3511 pci_unmap_srb(acb, srb);
3512
3513 cmd->scsi_done(cmd);
3514 waiting_process_next(acb);
3515 }
3516
3517
3518 /* abort all cmds in our queues */
3519 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3520 struct scsi_cmnd *cmd, u8 force)
3521 {
3522 struct DeviceCtlBlk *dcb;
3523 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3524
3525 list_for_each_entry(dcb, &acb->dcb_list, list) {
3526 struct ScsiReqBlk *srb;
3527 struct ScsiReqBlk *tmp;
3528 struct scsi_cmnd *p;
3529
3530 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3531 enum dma_data_direction dir;
3532 int result;
3533
3534 p = srb->cmd;
3535 dir = p->sc_data_direction;
3536 result = MK_RES(0, did_flag, 0, 0);
3537 printk("G:%p(%02i-%i) ", p,
3538 p->device->id, (u8)p->device->lun);
3539 srb_going_remove(dcb, srb);
3540 free_tag(dcb, srb);
3541 srb_free_insert(acb, srb);
3542 p->result = result;
3543 pci_unmap_srb_sense(acb, srb);
3544 pci_unmap_srb(acb, srb);
3545 if (force) {
3546 /* For new EH, we normally don't need to give commands back,
3547 * as they all complete or all time out */
3548 p->scsi_done(p);
3549 }
3550 }
3551 if (!list_empty(&dcb->srb_going_list))
3552 dprintkl(KERN_DEBUG,
3553 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3554 dcb->target_id, dcb->target_lun);
3555 if (dcb->tag_mask)
3556 dprintkl(KERN_DEBUG,
3557 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3558 dcb->target_id, dcb->target_lun,
3559 dcb->tag_mask);
3560
3561 /* Waiting queue */
3562 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3563 int result;
3564 p = srb->cmd;
3565
3566 result = MK_RES(0, did_flag, 0, 0);
3567 printk("W:%p<%02i-%i>", p, p->device->id,
3568 (u8)p->device->lun);
3569 srb_waiting_remove(dcb, srb);
3570 srb_free_insert(acb, srb);
3571 p->result = result;
3572 pci_unmap_srb_sense(acb, srb);
3573 pci_unmap_srb(acb, srb);
3574 if (force) {
3575 /* For new EH, we normally don't need to give commands back,
3576 * as they all complete or all time out */
3577 cmd->scsi_done(cmd);
3578 }
3579 }
3580 if (!list_empty(&dcb->srb_waiting_list))
3581 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3582 list_size(&dcb->srb_waiting_list), dcb->target_id,
3583 dcb->target_lun);
3584 dcb->flag &= ~ABORT_DEV_;
3585 }
3586 printk("\n");
3587 }
3588
3589
3590 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3591 {
3592 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3593 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3594 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3595
3596 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3597 /* nothing */;
3598 }
3599
3600
3601 static void set_basic_config(struct AdapterCtlBlk *acb)
3602 {
3603 u8 bval;
3604 u16 wval;
3605 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3606 if (acb->config & HCC_PARITY)
3607 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3608 else
3609 bval = PHASELATCH | INITIATOR | BLOCKRST;
3610
3611 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3612
3613 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3614 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3615 /* program Host ID */
3616 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3617 /* set ansynchronous transfer */
3618 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3619 /* Turn LED control off */
3620 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3621 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3622 /* DMA config */
3623 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3624 wval |=
3625 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3626 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3627 /* Clear pending interrupt status */
3628 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3629 /* Enable SCSI interrupt */
3630 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3631 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3632 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3633 );
3634 }
3635
3636
3637 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3638 {
3639 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3640 /* delay half a second */
3641 if (timer_pending(&acb->waiting_timer))
3642 del_timer(&acb->waiting_timer);
3643
3644 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3645 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3646 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3647 udelay(500);
3648 /* Maybe we locked up the bus? Then lets wait even longer ... */
3649 acb->last_reset =
3650 jiffies + 5 * HZ / 2 +
3651 HZ * acb->eeprom.delay_time;
3652
3653 clear_fifo(acb, "scsi_reset_detect");
3654 set_basic_config(acb);
3655 /*1.25 */
3656 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3657
3658 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3659 acb->acb_flag |= RESET_DONE;
3660 } else {
3661 acb->acb_flag |= RESET_DETECT;
3662 reset_dev_param(acb);
3663 doing_srb_done(acb, DID_RESET, NULL, 1);
3664 /*DC395x_RecoverSRB( acb ); */
3665 acb->active_dcb = NULL;
3666 acb->acb_flag = 0;
3667 waiting_process_next(acb);
3668 }
3669 }
3670
3671
3672 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3673 struct ScsiReqBlk *srb)
3674 {
3675 struct scsi_cmnd *cmd = srb->cmd;
3676 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3677 cmd, cmd->device->id, (u8)cmd->device->lun);
3678
3679 srb->flag |= AUTO_REQSENSE;
3680 srb->adapter_status = 0;
3681 srb->target_status = 0;
3682
3683 /* KG: Can this prevent crap sense data ? */
3684 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3685
3686 /* Save some data */
3687 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3688 srb->segment_x[0].address;
3689 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3690 srb->segment_x[0].length;
3691 srb->xferred = srb->total_xfer_length;
3692 /* srb->segment_x : a one entry of S/G list table */
3693 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3694 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3695 /* Map sense buffer */
3696 srb->segment_x[0].address =
3697 pci_map_single(acb->dev, cmd->sense_buffer,
3698 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3699 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3700 cmd->sense_buffer, srb->segment_x[0].address,
3701 SCSI_SENSE_BUFFERSIZE);
3702 srb->sg_count = 1;
3703 srb->sg_index = 0;
3704
3705 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3706 dprintkl(KERN_DEBUG,
3707 "request_sense: (0x%p) failed <%02i-%i>\n",
3708 srb->cmd, dcb->target_id, dcb->target_lun);
3709 srb_going_to_waiting_move(dcb, srb);
3710 waiting_set_timer(acb, HZ / 100);
3711 }
3712 }
3713
3714
3715 /**
3716 * device_alloc - Allocate a new device instance. This create the
3717 * devices instance and sets up all the data items. The adapter
3718 * instance is required to obtain confiuration information for this
3719 * device. This does *not* add this device to the adapters device
3720 * list.
3721 *
3722 * @acb: The adapter to obtain configuration information from.
3723 * @target: The target for the new device.
3724 * @lun: The lun for the new device.
3725 *
3726 * Return the new device if successful or NULL on failure.
3727 **/
3728 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3729 u8 target, u8 lun)
3730 {
3731 struct NvRamType *eeprom = &acb->eeprom;
3732 u8 period_index = eeprom->target[target].period & 0x07;
3733 struct DeviceCtlBlk *dcb;
3734
3735 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3736 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3737 if (!dcb)
3738 return NULL;
3739 dcb->acb = NULL;
3740 INIT_LIST_HEAD(&dcb->srb_going_list);
3741 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3742 dcb->active_srb = NULL;
3743 dcb->tag_mask = 0;
3744 dcb->max_command = 1;
3745 dcb->target_id = target;
3746 dcb->target_lun = lun;
3747 dcb->dev_mode = eeprom->target[target].cfg0;
3748 #ifndef DC395x_NO_DISCONNECT
3749 dcb->identify_msg =
3750 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3751 #else
3752 dcb->identify_msg = IDENTIFY(0, lun);
3753 #endif
3754 dcb->inquiry7 = 0;
3755 dcb->sync_mode = 0;
3756 dcb->min_nego_period = clock_period[period_index];
3757 dcb->sync_period = 0;
3758 dcb->sync_offset = 0;
3759 dcb->flag = 0;
3760
3761 #ifndef DC395x_NO_WIDE
3762 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3763 && (acb->config & HCC_WIDE_CARD))
3764 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3765 #endif
3766 #ifndef DC395x_NO_SYNC
3767 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3768 if (!(lun) || current_sync_offset)
3769 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3770 #endif
3771 if (dcb->target_lun != 0) {
3772 /* Copy settings */
3773 struct DeviceCtlBlk *p;
3774 list_for_each_entry(p, &acb->dcb_list, list)
3775 if (p->target_id == dcb->target_id)
3776 break;
3777 dprintkdbg(DBG_1,
3778 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3779 dcb->target_id, dcb->target_lun,
3780 p->target_id, p->target_lun);
3781 dcb->sync_mode = p->sync_mode;
3782 dcb->sync_period = p->sync_period;
3783 dcb->min_nego_period = p->min_nego_period;
3784 dcb->sync_offset = p->sync_offset;
3785 dcb->inquiry7 = p->inquiry7;
3786 }
3787 return dcb;
3788 }
3789
3790
3791 /**
3792 * adapter_add_device - Adds the device instance to the adaptor instance.
3793 *
3794 * @acb: The adapter device to be updated
3795 * @dcb: A newly created and initialised device instance to add.
3796 **/
3797 static void adapter_add_device(struct AdapterCtlBlk *acb,
3798 struct DeviceCtlBlk *dcb)
3799 {
3800 /* backpointer to adapter */
3801 dcb->acb = acb;
3802
3803 /* set run_robin to this device if it is currently empty */
3804 if (list_empty(&acb->dcb_list))
3805 acb->dcb_run_robin = dcb;
3806
3807 /* add device to list */
3808 list_add_tail(&dcb->list, &acb->dcb_list);
3809
3810 /* update device maps */
3811 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3812 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3813 }
3814
3815
3816 /**
3817 * adapter_remove_device - Removes the device instance from the adaptor
3818 * instance. The device instance is not check in any way or freed by this.
3819 * The caller is expected to take care of that. This will simply remove the
3820 * device from the adapters data strcutures.
3821 *
3822 * @acb: The adapter device to be updated
3823 * @dcb: A device that has previously been added to the adapter.
3824 **/
3825 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3826 struct DeviceCtlBlk *dcb)
3827 {
3828 struct DeviceCtlBlk *i;
3829 struct DeviceCtlBlk *tmp;
3830 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3831 dcb->target_id, dcb->target_lun);
3832
3833 /* fix up any pointers to this device that we have in the adapter */
3834 if (acb->active_dcb == dcb)
3835 acb->active_dcb = NULL;
3836 if (acb->dcb_run_robin == dcb)
3837 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3838
3839 /* unlink from list */
3840 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3841 if (dcb == i) {
3842 list_del(&i->list);
3843 break;
3844 }
3845
3846 /* clear map and children */
3847 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3848 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3849 dcb->acb = NULL;
3850 }
3851
3852
3853 /**
3854 * adapter_remove_and_free_device - Removes a single device from the adapter
3855 * and then frees the device information.
3856 *
3857 * @acb: The adapter device to be updated
3858 * @dcb: A device that has previously been added to the adapter.
3859 */
3860 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3861 struct DeviceCtlBlk *dcb)
3862 {
3863 if (list_size(&dcb->srb_going_list) > 1) {
3864 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3865 "Won't remove because of %i active requests.\n",
3866 dcb->target_id, dcb->target_lun,
3867 list_size(&dcb->srb_going_list));
3868 return;
3869 }
3870 adapter_remove_device(acb, dcb);
3871 kfree(dcb);
3872 }
3873
3874
3875 /**
3876 * adapter_remove_and_free_all_devices - Removes and frees all of the
3877 * devices associated with the specified adapter.
3878 *
3879 * @acb: The adapter from which all devices should be removed.
3880 **/
3881 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3882 {
3883 struct DeviceCtlBlk *dcb;
3884 struct DeviceCtlBlk *tmp;
3885 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3886 list_size(&acb->dcb_list));
3887
3888 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3889 adapter_remove_and_free_device(acb, dcb);
3890 }
3891
3892
3893 /**
3894 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3895 * scsi device that we need to deal with. We allocate a new device and then
3896 * insert that device into the adapters device list.
3897 *
3898 * @scsi_device: The new scsi device that we need to handle.
3899 **/
3900 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3901 {
3902 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3903 struct DeviceCtlBlk *dcb;
3904
3905 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3906 if (!dcb)
3907 return -ENOMEM;
3908 adapter_add_device(acb, dcb);
3909
3910 return 0;
3911 }
3912
3913
3914 /**
3915 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3916 * device that is going away.
3917 *
3918 * @scsi_device: The new scsi device that we need to handle.
3919 **/
3920 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3921 {
3922 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3923 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3924 if (dcb)
3925 adapter_remove_and_free_device(acb, dcb);
3926 }
3927
3928
3929
3930
3931 /**
3932 * trms1040_wait_30us: wait for 30 us
3933 *
3934 * Waits for 30us (using the chip by the looks of it..)
3935 *
3936 * @io_port: base I/O address
3937 **/
3938 static void trms1040_wait_30us(unsigned long io_port)
3939 {
3940 /* ScsiPortStallExecution(30); wait 30 us */
3941 outb(5, io_port + TRM_S1040_GEN_TIMER);
3942 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3943 /* nothing */ ;
3944 }
3945
3946
3947 /**
3948 * trms1040_write_cmd - write the secified command and address to
3949 * chip
3950 *
3951 * @io_port: base I/O address
3952 * @cmd: SB + op code (command) to send
3953 * @addr: address to send
3954 **/
3955 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3956 {
3957 int i;
3958 u8 send_data;
3959
3960 /* program SB + OP code */
3961 for (i = 0; i < 3; i++, cmd <<= 1) {
3962 send_data = NVR_SELECT;
3963 if (cmd & 0x04) /* Start from bit 2 */
3964 send_data |= NVR_BITOUT;
3965
3966 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3967 trms1040_wait_30us(io_port);
3968 outb((send_data | NVR_CLOCK),
3969 io_port + TRM_S1040_GEN_NVRAM);
3970 trms1040_wait_30us(io_port);
3971 }
3972
3973 /* send address */
3974 for (i = 0; i < 7; i++, addr <<= 1) {
3975 send_data = NVR_SELECT;
3976 if (addr & 0x40) /* Start from bit 6 */
3977 send_data |= NVR_BITOUT;
3978
3979 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3980 trms1040_wait_30us(io_port);
3981 outb((send_data | NVR_CLOCK),
3982 io_port + TRM_S1040_GEN_NVRAM);
3983 trms1040_wait_30us(io_port);
3984 }
3985 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3986 trms1040_wait_30us(io_port);
3987 }
3988
3989
3990 /**
3991 * trms1040_set_data - store a single byte in the eeprom
3992 *
3993 * Called from write all to write a single byte into the SSEEPROM
3994 * Which is done one bit at a time.
3995 *
3996 * @io_port: base I/O address
3997 * @addr: offset into EEPROM
3998 * @byte: bytes to write
3999 **/
4000 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4001 {
4002 int i;
4003 u8 send_data;
4004
4005 /* Send write command & address */
4006 trms1040_write_cmd(io_port, 0x05, addr);
4007
4008 /* Write data */
4009 for (i = 0; i < 8; i++, byte <<= 1) {
4010 send_data = NVR_SELECT;
4011 if (byte & 0x80) /* Start from bit 7 */
4012 send_data |= NVR_BITOUT;
4013
4014 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4015 trms1040_wait_30us(io_port);
4016 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4017 trms1040_wait_30us(io_port);
4018 }
4019 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4020 trms1040_wait_30us(io_port);
4021
4022 /* Disable chip select */
4023 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4024 trms1040_wait_30us(io_port);
4025
4026 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4027 trms1040_wait_30us(io_port);
4028
4029 /* Wait for write ready */
4030 while (1) {
4031 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4032 trms1040_wait_30us(io_port);
4033
4034 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4035 trms1040_wait_30us(io_port);
4036
4037 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4038 break;
4039 }
4040
4041 /* Disable chip select */
4042 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4043 }
4044
4045
4046 /**
4047 * trms1040_write_all - write 128 bytes to the eeprom
4048 *
4049 * Write the supplied 128 bytes to the chips SEEPROM
4050 *
4051 * @eeprom: the data to write
4052 * @io_port: the base io port
4053 **/
4054 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4055 {
4056 u8 *b_eeprom = (u8 *)eeprom;
4057 u8 addr;
4058
4059 /* Enable SEEPROM */
4060 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4061 io_port + TRM_S1040_GEN_CONTROL);
4062
4063 /* write enable */
4064 trms1040_write_cmd(io_port, 0x04, 0xFF);
4065 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4066 trms1040_wait_30us(io_port);
4067
4068 /* write */
4069 for (addr = 0; addr < 128; addr++, b_eeprom++)
4070 trms1040_set_data(io_port, addr, *b_eeprom);
4071
4072 /* write disable */
4073 trms1040_write_cmd(io_port, 0x04, 0x00);
4074 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4075 trms1040_wait_30us(io_port);
4076
4077 /* Disable SEEPROM */
4078 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4079 io_port + TRM_S1040_GEN_CONTROL);
4080 }
4081
4082
4083 /**
4084 * trms1040_get_data - get a single byte from the eeprom
4085 *
4086 * Called from read all to read a single byte into the SSEEPROM
4087 * Which is done one bit at a time.
4088 *
4089 * @io_port: base I/O address
4090 * @addr: offset into SEEPROM
4091 *
4092 * Returns the byte read.
4093 **/
4094 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
4095 {
4096 int i;
4097 u8 read_byte;
4098 u8 result = 0;
4099
4100 /* Send read command & address */
4101 trms1040_write_cmd(io_port, 0x06, addr);
4102
4103 /* read data */
4104 for (i = 0; i < 8; i++) {
4105 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4106 trms1040_wait_30us(io_port);
4107 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4108
4109 /* Get data bit while falling edge */
4110 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4111 result <<= 1;
4112 if (read_byte & NVR_BITIN)
4113 result |= 1;
4114
4115 trms1040_wait_30us(io_port);
4116 }
4117
4118 /* Disable chip select */
4119 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4120 return result;
4121 }
4122
4123
4124 /**
4125 * trms1040_read_all - read all bytes from the eeprom
4126 *
4127 * Read the 128 bytes from the SEEPROM.
4128 *
4129 * @eeprom: where to store the data
4130 * @io_port: the base io port
4131 **/
4132 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4133 {
4134 u8 *b_eeprom = (u8 *)eeprom;
4135 u8 addr;
4136
4137 /* Enable SEEPROM */
4138 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4139 io_port + TRM_S1040_GEN_CONTROL);
4140
4141 /* read details */
4142 for (addr = 0; addr < 128; addr++, b_eeprom++)
4143 *b_eeprom = trms1040_get_data(io_port, addr);
4144
4145 /* Disable SEEPROM */
4146 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4147 io_port + TRM_S1040_GEN_CONTROL);
4148 }
4149
4150
4151
4152 /**
4153 * check_eeprom - get and check contents of the eeprom
4154 *
4155 * Read seeprom 128 bytes into the memory provider in eeprom.
4156 * Checks the checksum and if it's not correct it uses a set of default
4157 * values.
4158 *
4159 * @eeprom: caller allocated strcuture to read the eeprom data into
4160 * @io_port: io port to read from
4161 **/
4162 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4163 {
4164 u16 *w_eeprom = (u16 *)eeprom;
4165 u16 w_addr;
4166 u16 cksum;
4167 u32 d_addr;
4168 u32 *d_eeprom;
4169
4170 trms1040_read_all(eeprom, io_port); /* read eeprom */
4171
4172 cksum = 0;
4173 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4174 w_addr++, w_eeprom++)
4175 cksum += *w_eeprom;
4176 if (cksum != 0x1234) {
4177 /*
4178 * Checksum is wrong.
4179 * Load a set of defaults into the eeprom buffer
4180 */
4181 dprintkl(KERN_WARNING,
4182 "EEProm checksum error: using default values and options.\n");
4183 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4184 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4185 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4186 eeprom->sub_sys_id[1] =
4187 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4188 eeprom->sub_class = 0x00;
4189 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4190 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4191 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4192 eeprom->device_id[1] =
4193 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4194 eeprom->reserved = 0x00;
4195
4196 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4197 d_addr < 16; d_addr++, d_eeprom++)
4198 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4199
4200 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4201 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4202 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4203 *d_eeprom = 0x00;
4204
4205 /* Now load defaults (maybe set by boot/module params) */
4206 set_safe_settings();
4207 fix_settings();
4208 eeprom_override(eeprom);
4209
4210 eeprom->cksum = 0x00;
4211 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4212 w_addr < 63; w_addr++, w_eeprom++)
4213 cksum += *w_eeprom;
4214
4215 *w_eeprom = 0x1234 - cksum;
4216 trms1040_write_all(eeprom, io_port);
4217 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4218 } else {
4219 set_safe_settings();
4220 eeprom_index_to_delay(eeprom);
4221 eeprom_override(eeprom);
4222 }
4223 }
4224
4225
4226 /**
4227 * print_eeprom_settings - output the eeprom settings
4228 * to the kernel log so people can see what they were.
4229 *
4230 * @eeprom: The eeprom data strucutre to show details for.
4231 **/
4232 static void print_eeprom_settings(struct NvRamType *eeprom)
4233 {
4234 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4235 eeprom->scsi_id,
4236 eeprom->target[0].period,
4237 clock_speed[eeprom->target[0].period] / 10,
4238 clock_speed[eeprom->target[0].period] % 10,
4239 eeprom->target[0].cfg0);
4240 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4241 eeprom->channel_cfg, eeprom->max_tag,
4242 1 << eeprom->max_tag, eeprom->delay_time);
4243 }
4244
4245
4246 /* Free SG tables */
4247 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4248 {
4249 int i;
4250 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4251
4252 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4253 kfree(acb->srb_array[i].segment_x);
4254 }
4255
4256
4257 /*
4258 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4259 * should never cross a page boundary */
4260 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4261 {
4262 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4263 *SEGMENTX_LEN;
4264 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4265 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4266 int srb_idx = 0;
4267 unsigned i = 0;
4268 struct SGentry *uninitialized_var(ptr);
4269
4270 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4271 acb->srb_array[i].segment_x = NULL;
4272
4273 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4274 while (pages--) {
4275 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4276 if (!ptr) {
4277 adapter_sg_tables_free(acb);
4278 return 1;
4279 }
4280 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4281 PAGE_SIZE, ptr, srb_idx);
4282 i = 0;
4283 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4284 acb->srb_array[srb_idx++].segment_x =
4285 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4286 }
4287 if (i < srbs_per_page)
4288 acb->srb.segment_x =
4289 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4290 else
4291 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4292 return 0;
4293 }
4294
4295
4296
4297 /**
4298 * adapter_print_config - print adapter connection and termination
4299 * config
4300 *
4301 * The io port in the adapter needs to have been set before calling
4302 * this function.
4303 *
4304 * @acb: The adapter to print the information for.
4305 **/
4306 static void adapter_print_config(struct AdapterCtlBlk *acb)
4307 {
4308 u8 bval;
4309
4310 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4311 dprintkl(KERN_INFO, "%sConnectors: ",
4312 ((bval & WIDESCSI) ? "(Wide) " : ""));
4313 if (!(bval & CON5068))
4314 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4315 if (!(bval & CON68))
4316 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4317 if (!(bval & CON50))
4318 printk("int50 ");
4319 if ((bval & (CON5068 | CON50 | CON68)) ==
4320 0 /*(CON5068 | CON50 | CON68) */ )
4321 printk(" Oops! (All 3?) ");
4322 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4323 printk(" Termination: ");
4324 if (bval & DIS_TERM)
4325 printk("Disabled\n");
4326 else {
4327 if (bval & AUTOTERM)
4328 printk("Auto ");
4329 if (bval & LOW8TERM)
4330 printk("Low ");
4331 if (bval & UP8TERM)
4332 printk("High ");
4333 printk("\n");
4334 }
4335 }
4336
4337
4338 /**
4339 * adapter_init_params - Initialize the various parameters in the
4340 * adapter structure. Note that the pointer to the scsi_host is set
4341 * early (when this instance is created) and the io_port and irq
4342 * values are set later after they have been reserved. This just gets
4343 * everything set to a good starting position.
4344 *
4345 * The eeprom structure in the adapter needs to have been set before
4346 * calling this function.
4347 *
4348 * @acb: The adapter to initialize.
4349 **/
4350 static void adapter_init_params(struct AdapterCtlBlk *acb)
4351 {
4352 struct NvRamType *eeprom = &acb->eeprom;
4353 int i;
4354
4355 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4356 /* NOTE: acb->io_port_base is set at port registration time */
4357 /* NOTE: acb->io_port_len is set at port registration time */
4358
4359 INIT_LIST_HEAD(&acb->dcb_list);
4360 acb->dcb_run_robin = NULL;
4361 acb->active_dcb = NULL;
4362
4363 INIT_LIST_HEAD(&acb->srb_free_list);
4364 /* temp SRB for Q tag used or abort command used */
4365 acb->tmp_srb = &acb->srb;
4366 timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4367 timer_setup(&acb->selto_timer, NULL, 0);
4368
4369 acb->srb_count = DC395x_MAX_SRB_CNT;
4370
4371 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4372 /* NOTE: acb->irq_level is set at IRQ registration time */
4373
4374 acb->tag_max_num = 1 << eeprom->max_tag;
4375 if (acb->tag_max_num > 30)
4376 acb->tag_max_num = 30;
4377
4378 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4379 acb->gmode2 = eeprom->channel_cfg;
4380 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4381
4382 if (eeprom->channel_cfg & NAC_SCANLUN)
4383 acb->lun_chk = 1;
4384 acb->scan_devices = 1;
4385
4386 acb->scsi_host->this_id = eeprom->scsi_id;
4387 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4388
4389 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4390 acb->dcb_map[i] = 0;
4391
4392 acb->msg_len = 0;
4393
4394 /* link static array of srbs into the srb free list */
4395 for (i = 0; i < acb->srb_count - 1; i++)
4396 srb_free_insert(acb, &acb->srb_array[i]);
4397 }
4398
4399
4400 /**
4401 * adapter_init_host - Initialize the scsi host instance based on
4402 * values that we have already stored in the adapter instance. There's
4403 * some mention that a lot of these are deprecated, so we won't use
4404 * them (we'll use the ones in the adapter instance) but we'll fill
4405 * them in in case something else needs them.
4406 *
4407 * The eeprom structure, irq and io ports in the adapter need to have
4408 * been set before calling this function.
4409 *
4410 * @host: The scsi host instance to fill in the values for.
4411 **/
4412 static void adapter_init_scsi_host(struct Scsi_Host *host)
4413 {
4414 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4415 struct NvRamType *eeprom = &acb->eeprom;
4416
4417 host->max_cmd_len = 24;
4418 host->can_queue = DC395x_MAX_CMD_QUEUE;
4419 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4420 host->this_id = (int)eeprom->scsi_id;
4421 host->io_port = acb->io_port_base;
4422 host->n_io_port = acb->io_port_len;
4423 host->dma_channel = -1;
4424 host->unique_id = acb->io_port_base;
4425 host->irq = acb->irq_level;
4426 acb->last_reset = jiffies;
4427
4428 host->max_id = 16;
4429 if (host->max_id - 1 == eeprom->scsi_id)
4430 host->max_id--;
4431
4432 if (eeprom->channel_cfg & NAC_SCANLUN)
4433 host->max_lun = 8;
4434 else
4435 host->max_lun = 1;
4436 }
4437
4438
4439 /**
4440 * adapter_init_chip - Get the chip into a know state and figure out
4441 * some of the settings that apply to this adapter.
4442 *
4443 * The io port in the adapter needs to have been set before calling
4444 * this function. The config will be configured correctly on return.
4445 *
4446 * @acb: The adapter which we are to init.
4447 **/
4448 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4449 {
4450 struct NvRamType *eeprom = &acb->eeprom;
4451
4452 /* Mask all the interrupt */
4453 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4454 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4455
4456 /* Reset SCSI module */
4457 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4458
4459 /* Reset PCI/DMA module */
4460 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4461 udelay(20);
4462
4463 /* program configuration 0 */
4464 acb->config = HCC_AUTOTERM | HCC_PARITY;
4465 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4466 acb->config |= HCC_WIDE_CARD;
4467
4468 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4469 acb->config |= HCC_SCSI_RESET;
4470
4471 if (acb->config & HCC_SCSI_RESET) {
4472 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4473 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4474
4475 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4476 /*spin_unlock_irq (&io_request_lock); */
4477 udelay(500);
4478
4479 acb->last_reset =
4480 jiffies + HZ / 2 +
4481 HZ * acb->eeprom.delay_time;
4482
4483 /*spin_lock_irq (&io_request_lock); */
4484 }
4485 }
4486
4487
4488 /**
4489 * init_adapter - Grab the resource for the card, setup the adapter
4490 * information, set the card into a known state, create the various
4491 * tables etc etc. This basically gets all adapter information all up
4492 * to date, initialised and gets the chip in sync with it.
4493 *
4494 * @host: This hosts adapter structure
4495 * @io_port: The base I/O port
4496 * @irq: IRQ
4497 *
4498 * Returns 0 if the initialization succeeds, any other value on
4499 * failure.
4500 **/
4501 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4502 u32 io_port_len, unsigned int irq)
4503 {
4504 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4505 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4506 goto failed;
4507 }
4508 /* store port base to indicate we have registered it */
4509 acb->io_port_base = io_port;
4510 acb->io_port_len = io_port_len;
4511
4512 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4513 /* release the region we just claimed */
4514 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4515 goto failed;
4516 }
4517 /* store irq to indicate we have registered it */
4518 acb->irq_level = irq;
4519
4520 /* get eeprom configuration information and command line settings etc */
4521 check_eeprom(&acb->eeprom, io_port);
4522 print_eeprom_settings(&acb->eeprom);
4523
4524 /* setup adapter control block */
4525 adapter_init_params(acb);
4526
4527 /* display card connectors/termination settings */
4528 adapter_print_config(acb);
4529
4530 if (adapter_sg_tables_alloc(acb)) {
4531 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4532 goto failed;
4533 }
4534 adapter_init_scsi_host(acb->scsi_host);
4535 adapter_init_chip(acb);
4536 set_basic_config(acb);
4537
4538 dprintkdbg(DBG_0,
4539 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4540 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4541 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4542 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4543 return 0;
4544
4545 failed:
4546 if (acb->irq_level)
4547 free_irq(acb->irq_level, acb);
4548 if (acb->io_port_base)
4549 release_region(acb->io_port_base, acb->io_port_len);
4550 adapter_sg_tables_free(acb);
4551
4552 return 1;
4553 }
4554
4555
4556 /**
4557 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4558 * stopping all operations and disabling interrupt generation on the
4559 * card.
4560 *
4561 * @acb: The adapter which we are to shutdown.
4562 **/
4563 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4564 {
4565 /* disable interrupts */
4566 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4567 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4568
4569 /* reset the scsi bus */
4570 if (acb->config & HCC_SCSI_RESET)
4571 reset_scsi_bus(acb);
4572
4573 /* clear any pending interrupt state */
4574 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4575 }
4576
4577
4578
4579 /**
4580 * adapter_uninit - Shut down the chip and release any resources that
4581 * we had allocated. Once this returns the adapter should not be used
4582 * anymore.
4583 *
4584 * @acb: The adapter which we are to un-initialize.
4585 **/
4586 static void adapter_uninit(struct AdapterCtlBlk *acb)
4587 {
4588 unsigned long flags;
4589 DC395x_LOCK_IO(acb->scsi_host, flags);
4590
4591 /* remove timers */
4592 if (timer_pending(&acb->waiting_timer))
4593 del_timer(&acb->waiting_timer);
4594 if (timer_pending(&acb->selto_timer))
4595 del_timer(&acb->selto_timer);
4596
4597 adapter_uninit_chip(acb);
4598 adapter_remove_and_free_all_devices(acb);
4599 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4600
4601 if (acb->irq_level)
4602 free_irq(acb->irq_level, acb);
4603 if (acb->io_port_base)
4604 release_region(acb->io_port_base, acb->io_port_len);
4605
4606 adapter_sg_tables_free(acb);
4607 }
4608
4609
4610 #undef YESNO
4611 #define YESNO(YN) \
4612 if (YN) seq_printf(m, " Yes ");\
4613 else seq_printf(m, " No ")
4614
4615 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4616 {
4617 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4618 int spd, spd1;
4619 struct DeviceCtlBlk *dcb;
4620 unsigned long flags;
4621 int dev;
4622
4623 seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4624 " Driver Version " DC395X_VERSION "\n");
4625
4626 DC395x_LOCK_IO(acb->scsi_host, flags);
4627
4628 seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4629 seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4630 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4631 seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4632 seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4633 seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4634
4635 seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4636 seq_printf(m, "AdapterID %i\n", host->this_id);
4637
4638 seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4639 /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4640 seq_printf(m, ", FilterCfg 0x%02x",
4641 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4642 seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4643 /*seq_printf(m, "\n"); */
4644
4645 seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4646 seq_printf(m, "Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4647 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4648 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4649 acb->dcb_map[6], acb->dcb_map[7]);
4650 seq_printf(m, " %02x %02x %02x %02x %02x %02x %02x %02x\n",
4651 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4652 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4653 acb->dcb_map[14], acb->dcb_map[15]);
4654
4655 seq_puts(m,
4656 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4657
4658 dev = 0;
4659 list_for_each_entry(dcb, &acb->dcb_list, list) {
4660 int nego_period;
4661 seq_printf(m, "%02i %02i %02i ", dev, dcb->target_id,
4662 dcb->target_lun);
4663 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4664 YESNO(dcb->sync_offset);
4665 YESNO(dcb->sync_period & WIDE_SYNC);
4666 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4667 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4668 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4669 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4670 if (dcb->sync_offset)
4671 seq_printf(m, " %03i ns ", nego_period);
4672 else
4673 seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4674
4675 if (dcb->sync_offset & 0x0f) {
4676 spd = 1000 / (nego_period);
4677 spd1 = 1000 % (nego_period);
4678 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4679 seq_printf(m, " %2i.%1i M %02i ", spd, spd1,
4680 (dcb->sync_offset & 0x0f));
4681 } else
4682 seq_puts(m, " ");
4683
4684 /* Add more info ... */
4685 seq_printf(m, " %02i\n", dcb->max_command);
4686 dev++;
4687 }
4688
4689 if (timer_pending(&acb->waiting_timer))
4690 seq_puts(m, "Waiting queue timer running\n");
4691 else
4692 seq_putc(m, '\n');
4693
4694 list_for_each_entry(dcb, &acb->dcb_list, list) {
4695 struct ScsiReqBlk *srb;
4696 if (!list_empty(&dcb->srb_waiting_list))
4697 seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4698 dcb->target_id, dcb->target_lun,
4699 list_size(&dcb->srb_waiting_list));
4700 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4701 seq_printf(m, " %p", srb->cmd);
4702 if (!list_empty(&dcb->srb_going_list))
4703 seq_printf(m, "\nDCB (%02i-%i): Going : %i:",
4704 dcb->target_id, dcb->target_lun,
4705 list_size(&dcb->srb_going_list));
4706 list_for_each_entry(srb, &dcb->srb_going_list, list)
4707 seq_printf(m, " %p", srb->cmd);
4708 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4709 seq_putc(m, '\n');
4710 }
4711
4712 if (debug_enabled(DBG_1)) {
4713 seq_printf(m, "DCB list for ACB %p:\n", acb);
4714 list_for_each_entry(dcb, &acb->dcb_list, list) {
4715 seq_printf(m, "%p -> ", dcb);
4716 }
4717 seq_puts(m, "END\n");
4718 }
4719
4720 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4721 return 0;
4722 }
4723
4724
4725 static struct scsi_host_template dc395x_driver_template = {
4726 .module = THIS_MODULE,
4727 .proc_name = DC395X_NAME,
4728 .show_info = dc395x_show_info,
4729 .name = DC395X_BANNER " " DC395X_VERSION,
4730 .queuecommand = dc395x_queue_command,
4731 .bios_param = dc395x_bios_param,
4732 .slave_alloc = dc395x_slave_alloc,
4733 .slave_destroy = dc395x_slave_destroy,
4734 .can_queue = DC395x_MAX_CAN_QUEUE,
4735 .this_id = 7,
4736 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4737 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4738 .eh_abort_handler = dc395x_eh_abort,
4739 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4740 .use_clustering = DISABLE_CLUSTERING,
4741 };
4742
4743
4744 /**
4745 * banner_display - Display banner on first instance of driver
4746 * initialized.
4747 **/
4748 static void banner_display(void)
4749 {
4750 static int banner_done = 0;
4751 if (!banner_done)
4752 {
4753 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4754 banner_done = 1;
4755 }
4756 }
4757
4758
4759 /**
4760 * dc395x_init_one - Initialise a single instance of the adapter.
4761 *
4762 * The PCI layer will call this once for each instance of the adapter
4763 * that it finds in the system. The pci_dev strcuture indicates which
4764 * instance we are being called from.
4765 *
4766 * @dev: The PCI device to initialize.
4767 * @id: Looks like a pointer to the entry in our pci device table
4768 * that was actually matched by the PCI subsystem.
4769 *
4770 * Returns 0 on success, or an error code (-ve) on failure.
4771 **/
4772 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4773 {
4774 struct Scsi_Host *scsi_host = NULL;
4775 struct AdapterCtlBlk *acb = NULL;
4776 unsigned long io_port_base;
4777 unsigned int io_port_len;
4778 unsigned int irq;
4779
4780 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4781 banner_display();
4782
4783 if (pci_enable_device(dev))
4784 {
4785 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4786 return -ENODEV;
4787 }
4788 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4789 io_port_len = pci_resource_len(dev, 0);
4790 irq = dev->irq;
4791 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4792
4793 /* allocate scsi host information (includes out adapter) */
4794 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4795 sizeof(struct AdapterCtlBlk));
4796 if (!scsi_host) {
4797 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4798 goto fail;
4799 }
4800 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4801 acb->scsi_host = scsi_host;
4802 acb->dev = dev;
4803
4804 /* initialise the adapter and everything we need */
4805 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4806 dprintkl(KERN_INFO, "adapter init failed\n");
4807 goto fail;
4808 }
4809
4810 pci_set_master(dev);
4811
4812 /* get the scsi mid level to scan for new devices on the bus */
4813 if (scsi_add_host(scsi_host, &dev->dev)) {
4814 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4815 goto fail;
4816 }
4817 pci_set_drvdata(dev, scsi_host);
4818 scsi_scan_host(scsi_host);
4819
4820 return 0;
4821
4822 fail:
4823 if (acb != NULL)
4824 adapter_uninit(acb);
4825 if (scsi_host != NULL)
4826 scsi_host_put(scsi_host);
4827 pci_disable_device(dev);
4828 return -ENODEV;
4829 }
4830
4831
4832 /**
4833 * dc395x_remove_one - Called to remove a single instance of the
4834 * adapter.
4835 *
4836 * @dev: The PCI device to initialize.
4837 **/
4838 static void dc395x_remove_one(struct pci_dev *dev)
4839 {
4840 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4841 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4842
4843 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4844
4845 scsi_remove_host(scsi_host);
4846 adapter_uninit(acb);
4847 pci_disable_device(dev);
4848 scsi_host_put(scsi_host);
4849 }
4850
4851
4852 static struct pci_device_id dc395x_pci_table[] = {
4853 {
4854 .vendor = PCI_VENDOR_ID_TEKRAM,
4855 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4856 .subvendor = PCI_ANY_ID,
4857 .subdevice = PCI_ANY_ID,
4858 },
4859 {} /* Terminating entry */
4860 };
4861 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4862
4863
4864 static struct pci_driver dc395x_driver = {
4865 .name = DC395X_NAME,
4866 .id_table = dc395x_pci_table,
4867 .probe = dc395x_init_one,
4868 .remove = dc395x_remove_one,
4869 };
4870
4871
4872 /**
4873 * dc395x_module_init - Module initialization function
4874 *
4875 * Used by both module and built-in driver to initialise this driver.
4876 **/
4877 static int __init dc395x_module_init(void)
4878 {
4879 return pci_register_driver(&dc395x_driver);
4880 }
4881
4882
4883 /**
4884 * dc395x_module_exit - Module cleanup function.
4885 **/
4886 static void __exit dc395x_module_exit(void)
4887 {
4888 pci_unregister_driver(&dc395x_driver);
4889 }
4890
4891
4892 module_init(dc395x_module_init);
4893 module_exit(dc395x_module_exit);
4894
4895 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4896 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4897 MODULE_LICENSE("GPL");
Linux with added FPC-III support