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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / scsi / dc395x.c
blob13aeca3d51f24919ddf10406e941fd04b25c00bc
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 u16 srb_count;
312
313 u8 sel_timeout;
314
315 unsigned int irq_level;
316 u8 tag_max_num;
317 u8 acb_flag;
318 u8 gmode2;
319
320 u8 config;
321 u8 lun_chk;
322 u8 scan_devices;
323 u8 hostid_bit;
324
325 u8 dcb_map[DC395x_MAX_SCSI_ID];
326 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
327
328 struct pci_dev *dev;
329
330 u8 msg_len;
331
332 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
333 struct ScsiReqBlk srb;
334
335 struct NvRamType eeprom; /* eeprom settings for this adapter */
336 };
337
338
339 /*---------------------------------------------------------------------------
340 Forward declarations
341 ---------------------------------------------------------------------------*/
342 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
343 u16 *pscsi_status);
344 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
345 u16 *pscsi_status);
346 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
347 u16 *pscsi_status);
348 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
349 u16 *pscsi_status);
350 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
351 u16 *pscsi_status);
352 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
353 u16 *pscsi_status);
354 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
355 u16 *pscsi_status);
356 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
357 u16 *pscsi_status);
358 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
359 u16 *pscsi_status);
360 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
361 u16 *pscsi_status);
362 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
363 u16 *pscsi_status);
364 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
365 u16 *pscsi_status);
366 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
367 u16 *pscsi_status);
368 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
369 u16 *pscsi_status);
370 static void set_basic_config(struct AdapterCtlBlk *acb);
371 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
372 struct ScsiReqBlk *srb);
373 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
374 static void data_io_transfer(struct AdapterCtlBlk *acb,
375 struct ScsiReqBlk *srb, u16 io_dir);
376 static void disconnect(struct AdapterCtlBlk *acb);
377 static void reselect(struct AdapterCtlBlk *acb);
378 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
379 struct ScsiReqBlk *srb);
380 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
381 struct ScsiReqBlk *srb);
382 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
383 struct ScsiReqBlk *srb);
384 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
385 struct scsi_cmnd *cmd, u8 force);
386 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
387 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
388 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
389 struct ScsiReqBlk *srb);
390 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
391 struct ScsiReqBlk *srb);
392 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
393 struct ScsiReqBlk *srb);
394 static void set_xfer_rate(struct AdapterCtlBlk *acb,
395 struct DeviceCtlBlk *dcb);
396 static void waiting_timeout(unsigned long ptr);
397
398
399 /*---------------------------------------------------------------------------
400 Static Data
401 ---------------------------------------------------------------------------*/
402 static u16 current_sync_offset = 0;
403
404 static void *dc395x_scsi_phase0[] = {
405 data_out_phase0,/* phase:0 */
406 data_in_phase0, /* phase:1 */
407 command_phase0, /* phase:2 */
408 status_phase0, /* phase:3 */
409 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
410 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
411 msgout_phase0, /* phase:6 */
412 msgin_phase0, /* phase:7 */
413 };
414
415 static void *dc395x_scsi_phase1[] = {
416 data_out_phase1,/* phase:0 */
417 data_in_phase1, /* phase:1 */
418 command_phase1, /* phase:2 */
419 status_phase1, /* phase:3 */
420 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
421 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
422 msgout_phase1, /* phase:6 */
423 msgin_phase1, /* phase:7 */
424 };
425
426 /*
427 *Fast20: 000 50ns, 20.0 MHz
428 * 001 75ns, 13.3 MHz
429 * 010 100ns, 10.0 MHz
430 * 011 125ns, 8.0 MHz
431 * 100 150ns, 6.6 MHz
432 * 101 175ns, 5.7 MHz
433 * 110 200ns, 5.0 MHz
434 * 111 250ns, 4.0 MHz
435 *
436 *Fast40(LVDS): 000 25ns, 40.0 MHz
437 * 001 50ns, 20.0 MHz
438 * 010 75ns, 13.3 MHz
439 * 011 100ns, 10.0 MHz
440 * 100 125ns, 8.0 MHz
441 * 101 150ns, 6.6 MHz
442 * 110 175ns, 5.7 MHz
443 * 111 200ns, 5.0 MHz
444 */
445 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
446
447 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
448 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
449 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
450
451
452 /*---------------------------------------------------------------------------
453 Configuration
454 ---------------------------------------------------------------------------*/
455 /*
456 * Module/boot parameters currently effect *all* instances of the
457 * card in the system.
458 */
459
460 /*
461 * Command line parameters are stored in a structure below.
462 * These are the index's into the structure for the various
463 * command line options.
464 */
465 #define CFG_ADAPTER_ID 0
466 #define CFG_MAX_SPEED 1
467 #define CFG_DEV_MODE 2
468 #define CFG_ADAPTER_MODE 3
469 #define CFG_TAGS 4
470 #define CFG_RESET_DELAY 5
471
472 #define CFG_NUM 6 /* number of configuration items */
473
474
475 /*
476 * Value used to indicate that a command line override
477 * hasn't been used to modify the value.
478 */
479 #define CFG_PARAM_UNSET -1
480
481
482 /*
483 * Hold command line parameters.
484 */
485 struct ParameterData {
486 int value; /* value of this setting */
487 int min; /* minimum value */
488 int max; /* maximum value */
489 int def; /* default value */
490 int safe; /* safe value */
491 };
492 static struct ParameterData __devinitdata cfg_data[] = {
493 { /* adapter id */
494 CFG_PARAM_UNSET,
495 0,
496 15,
497 7,
498 7
499 },
500 { /* max speed */
501 CFG_PARAM_UNSET,
502 0,
503 7,
504 1, /* 13.3Mhz */
505 4, /* 6.7Hmz */
506 },
507 { /* dev mode */
508 CFG_PARAM_UNSET,
509 0,
510 0x3f,
511 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
512 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
513 NTC_DO_SEND_START,
514 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
515 },
516 { /* adapter mode */
517 CFG_PARAM_UNSET,
518 0,
519 0x2f,
520 #ifdef CONFIG_SCSI_MULTI_LUN
521 NAC_SCANLUN |
522 #endif
523 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
524 /*| NAC_ACTIVE_NEG*/,
525 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
526 },
527 { /* tags */
528 CFG_PARAM_UNSET,
529 0,
530 5,
531 3, /* 16 tags (??) */
532 2,
533 },
534 { /* reset delay */
535 CFG_PARAM_UNSET,
536 0,
537 180,
538 1, /* 1 second */
539 10, /* 10 seconds */
540 }
541 };
542
543
544 /*
545 * Safe settings. If set to zero the 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 __devinit set_safe_settings(void)
578 {
579 if (use_safe_settings)
580 {
581 int i;
582
583 dprintkl(KERN_INFO, "Using safe settings.\n");
584 for (i = 0; i < CFG_NUM; i++)
585 {
586 cfg_data[i].value = cfg_data[i].safe;
587 }
588 }
589 }
590
591
592 /**
593 * fix_settings - reset any boot parameters which are out of range
594 * back to the default values.
595 **/
596 static void __devinit fix_settings(void)
597 {
598 int i;
599
600 dprintkdbg(DBG_1,
601 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
602 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
603 cfg_data[CFG_ADAPTER_ID].value,
604 cfg_data[CFG_MAX_SPEED].value,
605 cfg_data[CFG_DEV_MODE].value,
606 cfg_data[CFG_ADAPTER_MODE].value,
607 cfg_data[CFG_TAGS].value,
608 cfg_data[CFG_RESET_DELAY].value);
609 for (i = 0; i < CFG_NUM; i++)
610 {
611 if (cfg_data[i].value < cfg_data[i].min
612 || cfg_data[i].value > cfg_data[i].max)
613 cfg_data[i].value = cfg_data[i].def;
614 }
615 }
616
617
618
619 /*
620 * Mapping from the eeprom delay index value (index into this array)
621 * to the number of actual seconds that the delay should be for.
622 */
623 static char __devinitdata eeprom_index_to_delay_map[] =
624 { 1, 3, 5, 10, 16, 30, 60, 120 };
625
626
627 /**
628 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
629 * into a number of seconds.
630 *
631 * @eeprom: The eeprom structure in which we find the delay index to map.
632 **/
633 static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
634 {
635 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
636 }
637
638
639 /**
640 * delay_to_eeprom_index - Take a delay in seconds and return the
641 * closest eeprom index which will delay for at least that amount of
642 * seconds.
643 *
644 * @delay: The delay, in seconds, to find the eeprom index for.
645 **/
646 static int __devinit delay_to_eeprom_index(int delay)
647 {
648 u8 idx = 0;
649 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
650 idx++;
651 return idx;
652 }
653
654
655 /**
656 * eeprom_override - Override the eeprom settings, in the provided
657 * eeprom structure, with values that have been set on the command
658 * line.
659 *
660 * @eeprom: The eeprom data to override with command line options.
661 **/
662 static void __devinit eeprom_override(struct NvRamType *eeprom)
663 {
664 u8 id;
665
666 /* Adapter Settings */
667 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
668 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
669
670 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
671 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
672
673 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
674 eeprom->delay_time = delay_to_eeprom_index(
675 cfg_data[CFG_RESET_DELAY].value);
676
677 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
678 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
679
680 /* Device Settings */
681 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
682 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
683 eeprom->target[id].cfg0 =
684 (u8)cfg_data[CFG_DEV_MODE].value;
685
686 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
687 eeprom->target[id].period =
688 (u8)cfg_data[CFG_MAX_SPEED].value;
689
690 }
691 }
692
693
694 /*---------------------------------------------------------------------------
695 ---------------------------------------------------------------------------*/
696
697 static unsigned int list_size(struct list_head *head)
698 {
699 unsigned int count = 0;
700 struct list_head *pos;
701 list_for_each(pos, head)
702 count++;
703 return count;
704 }
705
706
707 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
708 struct DeviceCtlBlk *pos)
709 {
710 int use_next = 0;
711 struct DeviceCtlBlk* next = NULL;
712 struct DeviceCtlBlk* i;
713
714 if (list_empty(head))
715 return NULL;
716
717 /* find supplied dcb and then select the next one */
718 list_for_each_entry(i, head, list)
719 if (use_next) {
720 next = i;
721 break;
722 } else if (i == pos) {
723 use_next = 1;
724 }
725 /* if no next one take the head one (ie, wraparound) */
726 if (!next)
727 list_for_each_entry(i, head, list) {
728 next = i;
729 break;
730 }
731
732 return next;
733 }
734
735
736 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
737 {
738 if (srb->tag_number < 255) {
739 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
740 srb->tag_number = 255;
741 }
742 }
743
744
745 /* Find cmd in SRB list */
746 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
747 struct list_head *head)
748 {
749 struct ScsiReqBlk *i;
750 list_for_each_entry(i, head, list)
751 if (i->cmd == cmd)
752 return i;
753 return NULL;
754 }
755
756
757 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
758 {
759 struct list_head *head = &acb->srb_free_list;
760 struct ScsiReqBlk *srb = NULL;
761
762 if (!list_empty(head)) {
763 srb = list_entry(head->next, struct ScsiReqBlk, list);
764 list_del(head->next);
765 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
766 }
767 return srb;
768 }
769
770
771 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
772 {
773 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
774 list_add_tail(&srb->list, &acb->srb_free_list);
775 }
776
777
778 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
779 struct ScsiReqBlk *srb)
780 {
781 dprintkdbg(DBG_0, "srb_waiting_insert: (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 init_timer(&acb->waiting_timer);
861 acb->waiting_timer.function = waiting_timeout;
862 acb->waiting_timer.data = (unsigned long) acb;
863 if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
864 acb->waiting_timer.expires =
865 acb->scsi_host->last_reset - HZ / 2 + 1;
866 else
867 acb->waiting_timer.expires = jiffies + to + 1;
868 add_timer(&acb->waiting_timer);
869 }
870
871
872 /* Send the next command from the waiting list to the bus */
873 static void waiting_process_next(struct AdapterCtlBlk *acb)
874 {
875 struct DeviceCtlBlk *start = NULL;
876 struct DeviceCtlBlk *pos;
877 struct DeviceCtlBlk *dcb;
878 struct ScsiReqBlk *srb;
879 struct list_head *dcb_list_head = &acb->dcb_list;
880
881 if (acb->active_dcb
882 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
883 return;
884
885 if (timer_pending(&acb->waiting_timer))
886 del_timer(&acb->waiting_timer);
887
888 if (list_empty(dcb_list_head))
889 return;
890
891 /*
892 * Find the starting dcb. Need to find it again in the list
893 * since the list may have changed since we set the ptr to it
894 */
895 list_for_each_entry(dcb, dcb_list_head, list)
896 if (dcb == acb->dcb_run_robin) {
897 start = dcb;
898 break;
899 }
900 if (!start) {
901 /* This can happen! */
902 start = list_entry(dcb_list_head->next, typeof(*start), list);
903 acb->dcb_run_robin = start;
904 }
905
906
907 /*
908 * Loop over the dcb, but we start somewhere (potentially) in
909 * the middle of the loop so we need to manully do this.
910 */
911 pos = start;
912 do {
913 struct list_head *waiting_list_head = &pos->srb_waiting_list;
914
915 /* Make sure, the next another device gets scheduled ... */
916 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
917 acb->dcb_run_robin);
918
919 if (list_empty(waiting_list_head) ||
920 pos->max_command <= list_size(&pos->srb_going_list)) {
921 /* move to next dcb */
922 pos = dcb_get_next(dcb_list_head, pos);
923 } else {
924 srb = list_entry(waiting_list_head->next,
925 struct ScsiReqBlk, list);
926
927 /* Try to send to the bus */
928 if (!start_scsi(acb, pos, srb))
929 srb_waiting_to_going_move(pos, srb);
930 else
931 waiting_set_timer(acb, HZ/50);
932 break;
933 }
934 } while (pos != start);
935 }
936
937
938 /* Wake up waiting queue */
939 static void waiting_timeout(unsigned long ptr)
940 {
941 unsigned long flags;
942 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
943 dprintkdbg(DBG_1,
944 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
945 DC395x_LOCK_IO(acb->scsi_host, flags);
946 waiting_process_next(acb);
947 DC395x_UNLOCK_IO(acb->scsi_host, flags);
948 }
949
950
951 /* Get the DCB for a given ID/LUN combination */
952 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
953 {
954 return acb->children[id][lun];
955 }
956
957
958 /* Send SCSI Request Block (srb) to adapter (acb) */
959 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
960 {
961 struct DeviceCtlBlk *dcb = srb->dcb;
962
963 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
964 acb->active_dcb ||
965 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
966 srb_waiting_append(dcb, srb);
967 waiting_process_next(acb);
968 return;
969 }
970
971 if (!start_scsi(acb, dcb, srb))
972 srb_going_append(dcb, srb);
973 else {
974 srb_waiting_insert(dcb, srb);
975 waiting_set_timer(acb, HZ / 50);
976 }
977 }
978
979 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
980 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
981 struct ScsiReqBlk *srb)
982 {
983 int nseg;
984 enum dma_data_direction dir = cmd->sc_data_direction;
985 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
986 cmd, dcb->target_id, dcb->target_lun);
987
988 srb->dcb = dcb;
989 srb->cmd = cmd;
990 srb->sg_count = 0;
991 srb->total_xfer_length = 0;
992 srb->sg_bus_addr = 0;
993 srb->sg_index = 0;
994 srb->adapter_status = 0;
995 srb->target_status = 0;
996 srb->msg_count = 0;
997 srb->status = 0;
998 srb->flag = 0;
999 srb->state = 0;
1000 srb->retry_count = 0;
1001 srb->tag_number = TAG_NONE;
1002 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1003 srb->end_message = 0;
1004
1005 nseg = scsi_dma_map(cmd);
1006 BUG_ON(nseg < 0);
1007
1008 if (dir == PCI_DMA_NONE || !nseg) {
1009 dprintkdbg(DBG_0,
1010 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1011 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
1012 srb->segment_x[0].address);
1013 } else {
1014 int i;
1015 u32 reqlen = scsi_bufflen(cmd);
1016 struct scatterlist *sg;
1017 struct SGentry *sgp = srb->segment_x;
1018
1019 srb->sg_count = nseg;
1020
1021 dprintkdbg(DBG_0,
1022 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1023 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
1024 srb->sg_count);
1025
1026 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
1027 u32 busaddr = (u32)sg_dma_address(sg);
1028 u32 seglen = (u32)sg->length;
1029 sgp[i].address = busaddr;
1030 sgp[i].length = seglen;
1031 srb->total_xfer_length += seglen;
1032 }
1033 sgp += srb->sg_count - 1;
1034
1035 /*
1036 * adjust last page if too big as it is allocated
1037 * on even page boundaries
1038 */
1039 if (srb->total_xfer_length > reqlen) {
1040 sgp->length -= (srb->total_xfer_length - reqlen);
1041 srb->total_xfer_length = reqlen;
1042 }
1043
1044 /* Fixup for WIDE padding - make sure length is even */
1045 if (dcb->sync_period & WIDE_SYNC &&
1046 srb->total_xfer_length % 2) {
1047 srb->total_xfer_length++;
1048 sgp->length++;
1049 }
1050
1051 srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1052 srb->segment_x,
1053 SEGMENTX_LEN,
1054 PCI_DMA_TODEVICE);
1055
1056 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1057 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1058 }
1059
1060 srb->request_length = srb->total_xfer_length;
1061 }
1062
1063
1064 /**
1065 * dc395x_queue_command - queue scsi command passed from the mid
1066 * layer, invoke 'done' on completion
1067 *
1068 * @cmd: pointer to scsi command object
1069 * @done: function pointer to be invoked on completion
1070 *
1071 * Returns 1 if the adapter (host) is busy, else returns 0. One
1072 * reason for an adapter to be busy is that the number
1073 * of outstanding queued commands is already equal to
1074 * struct Scsi_Host::can_queue .
1075 *
1076 * Required: if struct Scsi_Host::can_queue is ever non-zero
1077 * then this function is required.
1078 *
1079 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1080 * and is expected to be held on return.
1081 *
1082 **/
1083 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1084 {
1085 struct DeviceCtlBlk *dcb;
1086 struct ScsiReqBlk *srb;
1087 struct AdapterCtlBlk *acb =
1088 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1089 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
1090 cmd, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
1091
1092 /* Assume BAD_TARGET; will be cleared later */
1093 cmd->result = DID_BAD_TARGET << 16;
1094
1095 /* ignore invalid targets */
1096 if (cmd->device->id >= acb->scsi_host->max_id ||
1097 cmd->device->lun >= acb->scsi_host->max_lun ||
1098 cmd->device->lun >31) {
1099 goto complete;
1100 }
1101
1102 /* does the specified lun on the specified device exist */
1103 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1104 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1105 cmd->device->id, cmd->device->lun);
1106 goto complete;
1107 }
1108
1109 /* do we have a DCB for the device */
1110 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1111 if (!dcb) {
1112 /* should never happen */
1113 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1114 cmd->device->id, cmd->device->lun);
1115 goto complete;
1116 }
1117
1118 /* set callback and clear result in the command */
1119 cmd->scsi_done = done;
1120 cmd->result = 0;
1121
1122 srb = srb_get_free(acb);
1123 if (!srb)
1124 {
1125 /*
1126 * Return 1 since we are unable to queue this command at this
1127 * point in time.
1128 */
1129 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1130 return 1;
1131 }
1132
1133 build_srb(cmd, dcb, srb);
1134
1135 if (!list_empty(&dcb->srb_waiting_list)) {
1136 /* append to waiting queue */
1137 srb_waiting_append(dcb, srb);
1138 waiting_process_next(acb);
1139 } else {
1140 /* process immediately */
1141 send_srb(acb, srb);
1142 }
1143 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1144 return 0;
1145
1146 complete:
1147 /*
1148 * Complete the command immediatey, and then return 0 to
1149 * indicate that we have handled the command. This is usually
1150 * done when the commad is for things like non existent
1151 * devices.
1152 */
1153 done(cmd);
1154 return 0;
1155 }
1156
1157 static DEF_SCSI_QCMD(dc395x_queue_command)
1158
1159 /*
1160 * Return the disk geometry for the given SCSI device.
1161 */
1162 static int dc395x_bios_param(struct scsi_device *sdev,
1163 struct block_device *bdev, sector_t capacity, int *info)
1164 {
1165 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1166 int heads, sectors, cylinders;
1167 struct AdapterCtlBlk *acb;
1168 int size = capacity;
1169
1170 dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1171 acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1172 heads = 64;
1173 sectors = 32;
1174 cylinders = size / (heads * sectors);
1175
1176 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1177 heads = 255;
1178 sectors = 63;
1179 cylinders = size / (heads * sectors);
1180 }
1181 geom[0] = heads;
1182 geom[1] = sectors;
1183 geom[2] = cylinders;
1184 return 0;
1185 #else
1186 return scsicam_bios_param(bdev, capacity, info);
1187 #endif
1188 }
1189
1190
1191 static void dump_register_info(struct AdapterCtlBlk *acb,
1192 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1193 {
1194 u16 pstat;
1195 struct pci_dev *dev = acb->dev;
1196 pci_read_config_word(dev, PCI_STATUS, &pstat);
1197 if (!dcb)
1198 dcb = acb->active_dcb;
1199 if (!srb && dcb)
1200 srb = dcb->active_srb;
1201 if (srb) {
1202 if (!srb->cmd)
1203 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1204 srb, srb->cmd);
1205 else
1206 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1207 "cmnd=0x%02x <%02i-%i>\n",
1208 srb, srb->cmd,
1209 srb->cmd->cmnd[0], srb->cmd->device->id,
1210 srb->cmd->device->lun);
1211 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1212 srb->segment_x, srb->sg_count, srb->sg_index,
1213 srb->total_xfer_length);
1214 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1215 srb->state, srb->status, srb->scsi_phase,
1216 (acb->active_dcb) ? "" : "not");
1217 }
1218 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1219 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1220 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1221 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1222 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1223 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1224 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1225 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1226 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1227 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1228 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1229 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1230 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1231 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1232 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1233 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1234 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1235 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1236 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1237 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1238 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1239 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1240 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1241 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1242 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1243 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1244 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1245 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1246 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1247 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1248 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1249 "pci{status=0x%04x}\n",
1250 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1251 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1252 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1253 pstat);
1254 }
1255
1256
1257 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1258 {
1259 #if debug_enabled(DBG_FIFO)
1260 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1261 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1262 if (!(fifocnt & 0x40))
1263 dprintkdbg(DBG_FIFO,
1264 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1265 fifocnt & 0x3f, lines, txt);
1266 #endif
1267 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1268 }
1269
1270
1271 static void reset_dev_param(struct AdapterCtlBlk *acb)
1272 {
1273 struct DeviceCtlBlk *dcb;
1274 struct NvRamType *eeprom = &acb->eeprom;
1275 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1276
1277 list_for_each_entry(dcb, &acb->dcb_list, list) {
1278 u8 period_index;
1279
1280 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1281 dcb->sync_period = 0;
1282 dcb->sync_offset = 0;
1283
1284 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1285 period_index = eeprom->target[dcb->target_id].period & 0x07;
1286 dcb->min_nego_period = clock_period[period_index];
1287 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1288 || !(acb->config & HCC_WIDE_CARD))
1289 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1290 }
1291 }
1292
1293
1294 /*
1295 * perform a hard reset on the SCSI bus
1296 * @cmd - some command for this host (for fetching hooks)
1297 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1298 */
1299 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1300 {
1301 struct AdapterCtlBlk *acb =
1302 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1303 dprintkl(KERN_INFO,
1304 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1305 cmd, cmd->device->id, cmd->device->lun, cmd);
1306
1307 if (timer_pending(&acb->waiting_timer))
1308 del_timer(&acb->waiting_timer);
1309
1310 /*
1311 * disable interrupt
1312 */
1313 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1314 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1315 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1316 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1317
1318 reset_scsi_bus(acb);
1319 udelay(500);
1320
1321 /* We may be in serious trouble. Wait some seconds */
1322 acb->scsi_host->last_reset =
1323 jiffies + 3 * HZ / 2 +
1324 HZ * acb->eeprom.delay_time;
1325
1326 /*
1327 * re-enable interrupt
1328 */
1329 /* Clear SCSI FIFO */
1330 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1331 clear_fifo(acb, "eh_bus_reset");
1332 /* Delete pending IRQ */
1333 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1334 set_basic_config(acb);
1335
1336 reset_dev_param(acb);
1337 doing_srb_done(acb, DID_RESET, cmd, 0);
1338 acb->active_dcb = NULL;
1339 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1340 waiting_process_next(acb);
1341
1342 return SUCCESS;
1343 }
1344
1345 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1346 {
1347 int rc;
1348
1349 spin_lock_irq(cmd->device->host->host_lock);
1350 rc = __dc395x_eh_bus_reset(cmd);
1351 spin_unlock_irq(cmd->device->host->host_lock);
1352
1353 return rc;
1354 }
1355
1356 /*
1357 * abort an errant SCSI command
1358 * @cmd - command to be aborted
1359 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1360 */
1361 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1362 {
1363 /*
1364 * Look into our command queues: If it has not been sent already,
1365 * we remove it and return success. Otherwise fail.
1366 */
1367 struct AdapterCtlBlk *acb =
1368 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1369 struct DeviceCtlBlk *dcb;
1370 struct ScsiReqBlk *srb;
1371 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1372 cmd, cmd->device->id, cmd->device->lun, cmd);
1373
1374 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1375 if (!dcb) {
1376 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1377 return FAILED;
1378 }
1379
1380 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1381 if (srb) {
1382 srb_waiting_remove(dcb, srb);
1383 pci_unmap_srb_sense(acb, srb);
1384 pci_unmap_srb(acb, srb);
1385 free_tag(dcb, srb);
1386 srb_free_insert(acb, srb);
1387 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1388 cmd->result = DID_ABORT << 16;
1389 return SUCCESS;
1390 }
1391 srb = find_cmd(cmd, &dcb->srb_going_list);
1392 if (srb) {
1393 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1394 /* XXX: Should abort the command here */
1395 } else {
1396 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1397 }
1398 return FAILED;
1399 }
1400
1401
1402 /* SDTR */
1403 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1404 struct ScsiReqBlk *srb)
1405 {
1406 u8 *ptr = srb->msgout_buf + srb->msg_count;
1407 if (srb->msg_count > 1) {
1408 dprintkl(KERN_INFO,
1409 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1410 srb->msg_count, srb->msgout_buf[0],
1411 srb->msgout_buf[1]);
1412 return;
1413 }
1414 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1415 dcb->sync_offset = 0;
1416 dcb->min_nego_period = 200 >> 2;
1417 } else if (dcb->sync_offset == 0)
1418 dcb->sync_offset = SYNC_NEGO_OFFSET;
1419
1420 *ptr++ = MSG_EXTENDED; /* (01h) */
1421 *ptr++ = 3; /* length */
1422 *ptr++ = EXTENDED_SDTR; /* (01h) */
1423 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1424 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1425 srb->msg_count += 5;
1426 srb->state |= SRB_DO_SYNC_NEGO;
1427 }
1428
1429
1430 /* WDTR */
1431 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1432 struct ScsiReqBlk *srb)
1433 {
1434 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1435 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1436 u8 *ptr = srb->msgout_buf + srb->msg_count;
1437 if (srb->msg_count > 1) {
1438 dprintkl(KERN_INFO,
1439 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1440 srb->msg_count, srb->msgout_buf[0],
1441 srb->msgout_buf[1]);
1442 return;
1443 }
1444 *ptr++ = MSG_EXTENDED; /* (01h) */
1445 *ptr++ = 2; /* length */
1446 *ptr++ = EXTENDED_WDTR; /* (03h) */
1447 *ptr++ = wide;
1448 srb->msg_count += 4;
1449 srb->state |= SRB_DO_WIDE_NEGO;
1450 }
1451
1452
1453 #if 0
1454 /* Timer to work around chip flaw: When selecting and the bus is
1455 * busy, we sometimes miss a Selection timeout IRQ */
1456 void selection_timeout_missed(unsigned long ptr);
1457 /* Sets the timer to wake us up */
1458 static void selto_timer(struct AdapterCtlBlk *acb)
1459 {
1460 if (timer_pending(&acb->selto_timer))
1461 return;
1462 acb->selto_timer.function = selection_timeout_missed;
1463 acb->selto_timer.data = (unsigned long) acb;
1464 if (time_before
1465 (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
1466 acb->selto_timer.expires =
1467 acb->scsi_host->last_reset + HZ / 2 + 1;
1468 else
1469 acb->selto_timer.expires = jiffies + HZ + 1;
1470 add_timer(&acb->selto_timer);
1471 }
1472
1473
1474 void selection_timeout_missed(unsigned long ptr)
1475 {
1476 unsigned long flags;
1477 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1478 struct ScsiReqBlk *srb;
1479 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1480 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1481 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1482 return;
1483 }
1484 DC395x_LOCK_IO(acb->scsi_host, flags);
1485 srb = acb->active_dcb->active_srb;
1486 disconnect(acb);
1487 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1488 }
1489 #endif
1490
1491
1492 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1493 struct ScsiReqBlk* srb)
1494 {
1495 u16 s_stat2, return_code;
1496 u8 s_stat, scsicommand, i, identify_message;
1497 u8 *ptr;
1498 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1499 dcb->target_id, dcb->target_lun, srb);
1500
1501 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1502
1503 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1504 s_stat2 = 0;
1505 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1506 #if 1
1507 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1508 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1509 s_stat, s_stat2);
1510 /*
1511 * Try anyway?
1512 *
1513 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1514 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1515 * (This is likely to be a bug in the hardware. Obviously, most people
1516 * only have one initiator per SCSI bus.)
1517 * Instead let this fail and have the timer make sure the command is
1518 * tried again after a short time
1519 */
1520 /*selto_timer (acb); */
1521 return 1;
1522 }
1523 #endif
1524 if (acb->active_dcb) {
1525 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1526 "command while another command (0x%p) is active.",
1527 srb->cmd,
1528 acb->active_dcb->active_srb ?
1529 acb->active_dcb->active_srb->cmd : 0);
1530 return 1;
1531 }
1532 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1533 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1534 return 1;
1535 }
1536 /* Allow starting of SCSI commands half a second before we allow the mid-level
1537 * to queue them again after a reset */
1538 if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
1539 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1540 return 1;
1541 }
1542
1543 /* Flush FIFO */
1544 clear_fifo(acb, "start_scsi");
1545 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1546 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1547 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1548 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1549 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1550
1551 identify_message = dcb->identify_msg;
1552 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1553 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1554 if (srb->flag & AUTO_REQSENSE)
1555 identify_message &= 0xBF;
1556
1557 if (((srb->cmd->cmnd[0] == INQUIRY)
1558 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1559 || (srb->flag & AUTO_REQSENSE))
1560 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1561 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1562 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1563 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1564 && (dcb->target_lun == 0)) {
1565 srb->msgout_buf[0] = identify_message;
1566 srb->msg_count = 1;
1567 scsicommand = SCMD_SEL_ATNSTOP;
1568 srb->state = SRB_MSGOUT;
1569 #ifndef SYNC_FIRST
1570 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1571 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1572 build_wdtr(acb, dcb, srb);
1573 goto no_cmd;
1574 }
1575 #endif
1576 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1577 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1578 build_sdtr(acb, dcb, srb);
1579 goto no_cmd;
1580 }
1581 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1582 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1583 build_wdtr(acb, dcb, srb);
1584 goto no_cmd;
1585 }
1586 srb->msg_count = 0;
1587 }
1588 /* Send identify message */
1589 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1590
1591 scsicommand = SCMD_SEL_ATN;
1592 srb->state = SRB_START_;
1593 #ifndef DC395x_NO_TAGQ
1594 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1595 && (identify_message & 0xC0)) {
1596 /* Send Tag message */
1597 u32 tag_mask = 1;
1598 u8 tag_number = 0;
1599 while (tag_mask & dcb->tag_mask
1600 && tag_number < dcb->max_command) {
1601 tag_mask = tag_mask << 1;
1602 tag_number++;
1603 }
1604 if (tag_number >= dcb->max_command) {
1605 dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1606 "Out of tags target=<%02i-%i>)\n",
1607 srb->cmd, srb->cmd->device->id,
1608 srb->cmd->device->lun);
1609 srb->state = SRB_READY;
1610 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1611 DO_HWRESELECT);
1612 return 1;
1613 }
1614 /* Send Tag id */
1615 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1616 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1617 dcb->tag_mask |= tag_mask;
1618 srb->tag_number = tag_number;
1619 scsicommand = SCMD_SEL_ATN3;
1620 srb->state = SRB_START_;
1621 }
1622 #endif
1623 /*polling:*/
1624 /* Send CDB ..command block ......... */
1625 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1626 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun,
1627 srb->cmd->cmnd[0], srb->tag_number);
1628 if (srb->flag & AUTO_REQSENSE) {
1629 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1630 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1631 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1632 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1633 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1634 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1635 } else {
1636 ptr = (u8 *)srb->cmd->cmnd;
1637 for (i = 0; i < srb->cmd->cmd_len; i++)
1638 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1639 }
1640 no_cmd:
1641 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1642 DO_HWRESELECT | DO_DATALATCH);
1643 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1644 /*
1645 * If start_scsi return 1:
1646 * we caught an interrupt (must be reset or reselection ... )
1647 * : Let's process it first!
1648 */
1649 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1650 srb->cmd, dcb->target_id, dcb->target_lun);
1651 srb->state = SRB_READY;
1652 free_tag(dcb, srb);
1653 srb->msg_count = 0;
1654 return_code = 1;
1655 /* This IRQ should NOT get lost, as we did not acknowledge it */
1656 } else {
1657 /*
1658 * If start_scsi returns 0:
1659 * we know that the SCSI processor is free
1660 */
1661 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1662 dcb->active_srb = srb;
1663 acb->active_dcb = dcb;
1664 return_code = 0;
1665 /* it's important for atn stop */
1666 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1667 DO_DATALATCH | DO_HWRESELECT);
1668 /* SCSI command */
1669 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1670 }
1671 return return_code;
1672 }
1673
1674
1675 #define DC395x_ENABLE_MSGOUT \
1676 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1677 srb->state |= SRB_MSGOUT
1678
1679
1680 /* abort command */
1681 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1682 struct ScsiReqBlk *srb)
1683 {
1684 srb->msgout_buf[0] = ABORT;
1685 srb->msg_count = 1;
1686 DC395x_ENABLE_MSGOUT;
1687 srb->state &= ~SRB_MSGIN;
1688 srb->state |= SRB_MSGOUT;
1689 }
1690
1691
1692 /**
1693 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1694 * have been triggered for this card.
1695 *
1696 * @acb: a pointer to the adpter control block
1697 * @scsi_status: the status return when we checked the card
1698 **/
1699 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1700 u16 scsi_status)
1701 {
1702 struct DeviceCtlBlk *dcb;
1703 struct ScsiReqBlk *srb;
1704 u16 phase;
1705 u8 scsi_intstatus;
1706 unsigned long flags;
1707 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1708 u16 *);
1709
1710 DC395x_LOCK_IO(acb->scsi_host, flags);
1711
1712 /* This acknowledges the IRQ */
1713 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1714 if ((scsi_status & 0x2007) == 0x2002)
1715 dprintkl(KERN_DEBUG,
1716 "COP after COP completed? %04x\n", scsi_status);
1717 if (debug_enabled(DBG_KG)) {
1718 if (scsi_intstatus & INT_SELTIMEOUT)
1719 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1720 }
1721 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1722
1723 if (timer_pending(&acb->selto_timer))
1724 del_timer(&acb->selto_timer);
1725
1726 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1727 disconnect(acb); /* bus free interrupt */
1728 goto out_unlock;
1729 }
1730 if (scsi_intstatus & INT_RESELECTED) {
1731 reselect(acb);
1732 goto out_unlock;
1733 }
1734 if (scsi_intstatus & INT_SELECT) {
1735 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1736 goto out_unlock;
1737 }
1738 if (scsi_intstatus & INT_SCSIRESET) {
1739 scsi_reset_detect(acb);
1740 goto out_unlock;
1741 }
1742 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1743 dcb = acb->active_dcb;
1744 if (!dcb) {
1745 dprintkl(KERN_DEBUG,
1746 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1747 scsi_status, scsi_intstatus);
1748 goto out_unlock;
1749 }
1750 srb = dcb->active_srb;
1751 if (dcb->flag & ABORT_DEV_) {
1752 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1753 enable_msgout_abort(acb, srb);
1754 }
1755
1756 /* software sequential machine */
1757 phase = (u16)srb->scsi_phase;
1758
1759 /*
1760 * 62037 or 62137
1761 * call dc395x_scsi_phase0[]... "phase entry"
1762 * handle every phase before start transfer
1763 */
1764 /* data_out_phase0, phase:0 */
1765 /* data_in_phase0, phase:1 */
1766 /* command_phase0, phase:2 */
1767 /* status_phase0, phase:3 */
1768 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1769 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1770 /* msgout_phase0, phase:6 */
1771 /* msgin_phase0, phase:7 */
1772 dc395x_statev = dc395x_scsi_phase0[phase];
1773 dc395x_statev(acb, srb, &scsi_status);
1774
1775 /*
1776 * if there were any exception occurred scsi_status
1777 * will be modify to bus free phase new scsi_status
1778 * transfer out from ... previous dc395x_statev
1779 */
1780 srb->scsi_phase = scsi_status & PHASEMASK;
1781 phase = (u16)scsi_status & PHASEMASK;
1782
1783 /*
1784 * call dc395x_scsi_phase1[]... "phase entry" handle
1785 * every phase to do transfer
1786 */
1787 /* data_out_phase1, phase:0 */
1788 /* data_in_phase1, phase:1 */
1789 /* command_phase1, phase:2 */
1790 /* status_phase1, phase:3 */
1791 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1792 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1793 /* msgout_phase1, phase:6 */
1794 /* msgin_phase1, phase:7 */
1795 dc395x_statev = dc395x_scsi_phase1[phase];
1796 dc395x_statev(acb, srb, &scsi_status);
1797 }
1798 out_unlock:
1799 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1800 }
1801
1802
1803 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1804 {
1805 struct AdapterCtlBlk *acb = dev_id;
1806 u16 scsi_status;
1807 u8 dma_status;
1808 irqreturn_t handled = IRQ_NONE;
1809
1810 /*
1811 * Check for pending interrupt
1812 */
1813 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1814 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1815 if (scsi_status & SCSIINTERRUPT) {
1816 /* interrupt pending - let's process it! */
1817 dc395x_handle_interrupt(acb, scsi_status);
1818 handled = IRQ_HANDLED;
1819 }
1820 else if (dma_status & 0x20) {
1821 /* Error from the DMA engine */
1822 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1823 #if 0
1824 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1825 if (acb->active_dcb) {
1826 acb->active_dcb-> flag |= ABORT_DEV_;
1827 if (acb->active_dcb->active_srb)
1828 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1829 }
1830 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1831 #else
1832 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1833 acb = NULL;
1834 #endif
1835 handled = IRQ_HANDLED;
1836 }
1837
1838 return handled;
1839 }
1840
1841
1842 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1843 u16 *pscsi_status)
1844 {
1845 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1846 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1847 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1848
1849 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1850 srb->state &= ~SRB_MSGOUT;
1851 }
1852
1853
1854 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1855 u16 *pscsi_status)
1856 {
1857 u16 i;
1858 u8 *ptr;
1859 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1860
1861 clear_fifo(acb, "msgout_phase1");
1862 if (!(srb->state & SRB_MSGOUT)) {
1863 srb->state |= SRB_MSGOUT;
1864 dprintkl(KERN_DEBUG,
1865 "msgout_phase1: (0x%p) Phase unexpected\n",
1866 srb->cmd); /* So what ? */
1867 }
1868 if (!srb->msg_count) {
1869 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1870 srb->cmd);
1871 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1872 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1873 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1874 return;
1875 }
1876 ptr = (u8 *)srb->msgout_buf;
1877 for (i = 0; i < srb->msg_count; i++)
1878 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1879 srb->msg_count = 0;
1880 if (srb->msgout_buf[0] == MSG_ABORT)
1881 srb->state = SRB_ABORT_SENT;
1882
1883 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1884 }
1885
1886
1887 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1888 u16 *pscsi_status)
1889 {
1890 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1891 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1892 }
1893
1894
1895 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1896 u16 *pscsi_status)
1897 {
1898 struct DeviceCtlBlk *dcb;
1899 u8 *ptr;
1900 u16 i;
1901 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1902
1903 clear_fifo(acb, "command_phase1");
1904 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1905 if (!(srb->flag & AUTO_REQSENSE)) {
1906 ptr = (u8 *)srb->cmd->cmnd;
1907 for (i = 0; i < srb->cmd->cmd_len; i++) {
1908 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1909 ptr++;
1910 }
1911 } else {
1912 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1913 dcb = acb->active_dcb;
1914 /* target id */
1915 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1916 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1917 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1918 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1919 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1920 }
1921 srb->state |= SRB_COMMAND;
1922 /* it's important for atn stop */
1923 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1924 /* SCSI command */
1925 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1926 }
1927
1928
1929 /*
1930 * Verify that the remaining space in the hw sg lists is the same as
1931 * the count of remaining bytes in srb->total_xfer_length
1932 */
1933 static void sg_verify_length(struct ScsiReqBlk *srb)
1934 {
1935 if (debug_enabled(DBG_SG)) {
1936 unsigned len = 0;
1937 unsigned idx = srb->sg_index;
1938 struct SGentry *psge = srb->segment_x + idx;
1939 for (; idx < srb->sg_count; psge++, idx++)
1940 len += psge->length;
1941 if (len != srb->total_xfer_length)
1942 dprintkdbg(DBG_SG,
1943 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1944 srb->total_xfer_length, len);
1945 }
1946 }
1947
1948
1949 /*
1950 * Compute the next Scatter Gather list index and adjust its length
1951 * and address if necessary
1952 */
1953 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1954 {
1955 u8 idx;
1956 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1957 struct SGentry *psge = srb->segment_x + srb->sg_index;
1958
1959 dprintkdbg(DBG_0,
1960 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1961 xferred, srb->total_xfer_length, left);
1962 if (xferred == 0) {
1963 /* nothing to update since we did not transfer any data */
1964 return;
1965 }
1966
1967 sg_verify_length(srb);
1968 srb->total_xfer_length = left; /* update remaining count */
1969 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1970 if (xferred >= psge->length) {
1971 /* Complete SG entries done */
1972 xferred -= psge->length;
1973 } else {
1974 /* Partial SG entry done */
1975 psge->length -= xferred;
1976 psge->address += xferred;
1977 srb->sg_index = idx;
1978 pci_dma_sync_single_for_device(srb->dcb->
1979 acb->dev,
1980 srb->sg_bus_addr,
1981 SEGMENTX_LEN,
1982 PCI_DMA_TODEVICE);
1983 break;
1984 }
1985 psge++;
1986 }
1987 sg_verify_length(srb);
1988 }
1989
1990
1991 /*
1992 * We have transferred a single byte (PIO mode?) and need to update
1993 * the count of bytes remaining (total_xfer_length) and update the sg
1994 * entry to either point to next byte in the current sg entry, or of
1995 * already at the end to point to the start of the next sg entry
1996 */
1997 static void sg_subtract_one(struct ScsiReqBlk *srb)
1998 {
1999 sg_update_list(srb, srb->total_xfer_length - 1);
2000 }
2001
2002
2003 /*
2004 * cleanup_after_transfer
2005 *
2006 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2007 * KG: Currently called from StatusPhase1 ()
2008 * Should probably also be called from other places
2009 * Best might be to call it in DataXXPhase0, if new phase will differ
2010 */
2011 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2012 struct ScsiReqBlk *srb)
2013 {
2014 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2015 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2016 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2017 clear_fifo(acb, "cleanup/in");
2018 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2019 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2020 } else { /* write */
2021 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2022 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2023 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2024 clear_fifo(acb, "cleanup/out");
2025 }
2026 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2027 }
2028
2029
2030 /*
2031 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
2032 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2033 */
2034 #define DC395x_LASTPIO 4
2035
2036
2037 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2038 u16 *pscsi_status)
2039 {
2040 struct DeviceCtlBlk *dcb = srb->dcb;
2041 u16 scsi_status = *pscsi_status;
2042 u32 d_left_counter = 0;
2043 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
2044 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2045
2046 /*
2047 * KG: We need to drain the buffers before we draw any conclusions!
2048 * This means telling the DMA to push the rest into SCSI, telling
2049 * SCSI to push the rest to the bus.
2050 * However, the device might have been the one to stop us (phase
2051 * change), and the data in transit just needs to be accounted so
2052 * it can be retransmitted.)
2053 */
2054 /*
2055 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2056 * If we need more data, the DMA SG list will be freshly set up, anyway
2057 */
2058 dprintkdbg(DBG_PIO, "data_out_phase0: "
2059 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2060 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2061 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2062 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2063 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2064 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2065 srb->total_xfer_length);
2066 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2067
2068 if (!(srb->state & SRB_XFERPAD)) {
2069 if (scsi_status & PARITYERROR)
2070 srb->status |= PARITY_ERROR;
2071
2072 /*
2073 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2074 * is the no of bytes it got from the DMA engine not the no it
2075 * transferred successfully to the device. (And the difference could
2076 * be as much as the FIFO size, I guess ...)
2077 */
2078 if (!(scsi_status & SCSIXFERDONE)) {
2079 /*
2080 * when data transfer from DMA FIFO to SCSI FIFO
2081 * if there was some data left in SCSI FIFO
2082 */
2083 d_left_counter =
2084 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2085 0x1F);
2086 if (dcb->sync_period & WIDE_SYNC)
2087 d_left_counter <<= 1;
2088
2089 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2090 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2091 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2092 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2093 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2094 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2095 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2096 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2097 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2098 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2099 }
2100 /*
2101 * calculate all the residue data that not yet tranfered
2102 * SCSI transfer counter + left in SCSI FIFO data
2103 *
2104 * .....TRM_S1040_SCSI_COUNTER (24bits)
2105 * The counter always decrement by one for every SCSI byte transfer.
2106 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2107 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2108 */
2109 if (srb->total_xfer_length > DC395x_LASTPIO)
2110 d_left_counter +=
2111 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2112
2113 /* Is this a good idea? */
2114 /*clear_fifo(acb, "DOP1"); */
2115 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2116 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2117 && scsi_bufflen(srb->cmd) % 2) {
2118 d_left_counter = 0;
2119 dprintkl(KERN_INFO,
2120 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2121 scsi_status);
2122 }
2123 /*
2124 * KG: Oops again. Same thinko as above: The SCSI might have been
2125 * faster than the DMA engine, so that it ran out of data.
2126 * In that case, we have to do just nothing!
2127 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2128 */
2129 /*
2130 * KG: This is nonsense: We have been WRITING data to the bus
2131 * If the SCSI engine has no bytes left, how should the DMA engine?
2132 */
2133 if (d_left_counter == 0) {
2134 srb->total_xfer_length = 0;
2135 } else {
2136 /*
2137 * if transfer not yet complete
2138 * there were some data residue in SCSI FIFO or
2139 * SCSI transfer counter not empty
2140 */
2141 long oldxferred =
2142 srb->total_xfer_length - d_left_counter;
2143 const int diff =
2144 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2145 sg_update_list(srb, d_left_counter);
2146 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2147 if ((srb->segment_x[srb->sg_index].length ==
2148 diff && scsi_sg_count(srb->cmd))
2149 || ((oldxferred & ~PAGE_MASK) ==
2150 (PAGE_SIZE - diff))
2151 ) {
2152 dprintkl(KERN_INFO, "data_out_phase0: "
2153 "Work around chip bug (%i)?\n", diff);
2154 d_left_counter =
2155 srb->total_xfer_length - diff;
2156 sg_update_list(srb, d_left_counter);
2157 /*srb->total_xfer_length -= diff; */
2158 /*srb->virt_addr += diff; */
2159 /*if (srb->cmd->use_sg) */
2160 /* srb->sg_index++; */
2161 }
2162 }
2163 }
2164 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2165 cleanup_after_transfer(acb, srb);
2166 }
2167 }
2168
2169
2170 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2171 u16 *pscsi_status)
2172 {
2173 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2174 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2175 clear_fifo(acb, "data_out_phase1");
2176 /* do prepare before transfer when data out phase */
2177 data_io_transfer(acb, srb, XFERDATAOUT);
2178 }
2179
2180 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2181 u16 *pscsi_status)
2182 {
2183 u16 scsi_status = *pscsi_status;
2184
2185 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2186 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2187
2188 /*
2189 * KG: DataIn is much more tricky than DataOut. When the device is finished
2190 * and switches to another phase, the SCSI engine should be finished too.
2191 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2192 * engine and transferred to memory.
2193 * We should wait for the FIFOs to be emptied by that (is there any way to
2194 * enforce this?) and then stop the DMA engine, because it might think, that
2195 * there are more bytes to follow. Yes, the device might disconnect prior to
2196 * having all bytes transferred!
2197 * Also we should make sure that all data from the DMA engine buffer's really
2198 * made its way to the system memory! Some documentation on this would not
2199 * seem to be a bad idea, actually.
2200 */
2201 if (!(srb->state & SRB_XFERPAD)) {
2202 u32 d_left_counter;
2203 unsigned int sc, fc;
2204
2205 if (scsi_status & PARITYERROR) {
2206 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2207 "Parity Error\n", srb->cmd);
2208 srb->status |= PARITY_ERROR;
2209 }
2210 /*
2211 * KG: We should wait for the DMA FIFO to be empty ...
2212 * but: it would be better to wait first for the SCSI FIFO and then the
2213 * the DMA FIFO to become empty? How do we know, that the device not already
2214 * sent data to the FIFO in a MsgIn phase, eg.?
2215 */
2216 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2217 #if 0
2218 int ctr = 6000000;
2219 dprintkl(KERN_DEBUG,
2220 "DIP0: Wait for DMA FIFO to flush ...\n");
2221 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2222 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2223 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2224 while (!
2225 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2226 0x80) && --ctr);
2227 if (ctr < 6000000 - 1)
2228 dprintkl(KERN_DEBUG
2229 "DIP0: Had to wait for DMA ...\n");
2230 if (!ctr)
2231 dprintkl(KERN_ERR,
2232 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2233 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2234 #endif
2235 dprintkdbg(DBG_KG, "data_in_phase0: "
2236 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2237 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2238 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2239 }
2240 /* Now: Check remainig data: The SCSI counters should tell us ... */
2241 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2242 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2243 d_left_counter = sc + ((fc & 0x1f)
2244 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2245 0));
2246 dprintkdbg(DBG_KG, "data_in_phase0: "
2247 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2248 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2249 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2250 fc,
2251 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2252 sc,
2253 fc,
2254 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2255 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2256 srb->total_xfer_length, d_left_counter);
2257 #if DC395x_LASTPIO
2258 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2259 if (d_left_counter
2260 && srb->total_xfer_length <= DC395x_LASTPIO) {
2261 size_t left_io = srb->total_xfer_length;
2262
2263 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2264 /*sg_update_list (srb, d_left_counter); */
2265 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2266 "for remaining %i bytes:",
2267 fc & 0x1f,
2268 (srb->dcb->sync_period & WIDE_SYNC) ?
2269 "words" : "bytes",
2270 srb->total_xfer_length);
2271 if (srb->dcb->sync_period & WIDE_SYNC)
2272 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2273 CFG2_WIDEFIFO);
2274 while (left_io) {
2275 unsigned char *virt, *base = NULL;
2276 unsigned long flags = 0;
2277 size_t len = left_io;
2278 size_t offset = srb->request_length - left_io;
2279
2280 local_irq_save(flags);
2281 /* Assumption: it's inside one page as it's at most 4 bytes and
2282 I just assume it's on a 4-byte boundary */
2283 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2284 srb->sg_count, &offset, &len);
2285 virt = base + offset;
2286
2287 left_io -= len;
2288
2289 while (len) {
2290 u8 byte;
2291 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2292 *virt++ = byte;
2293
2294 if (debug_enabled(DBG_PIO))
2295 printk(" %02x", byte);
2296
2297 d_left_counter--;
2298 sg_subtract_one(srb);
2299
2300 len--;
2301
2302 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2303
2304 if (fc == 0x40) {
2305 left_io = 0;
2306 break;
2307 }
2308 }
2309
2310 WARN_ON((fc != 0x40) == !d_left_counter);
2311
2312 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2313 /* Read the last byte ... */
2314 if (srb->total_xfer_length > 0) {
2315 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2316
2317 *virt++ = byte;
2318 srb->total_xfer_length--;
2319 if (debug_enabled(DBG_PIO))
2320 printk(" %02x", byte);
2321 }
2322
2323 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2324 }
2325
2326 scsi_kunmap_atomic_sg(base);
2327 local_irq_restore(flags);
2328 }
2329 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2330 /*srb->total_xfer_length = 0; */
2331 if (debug_enabled(DBG_PIO))
2332 printk("\n");
2333 }
2334 #endif /* DC395x_LASTPIO */
2335
2336 #if 0
2337 /*
2338 * KG: This was in DATAOUT. Does it also belong here?
2339 * Nobody seems to know what counter and fifo_cnt count exactly ...
2340 */
2341 if (!(scsi_status & SCSIXFERDONE)) {
2342 /*
2343 * when data transfer from DMA FIFO to SCSI FIFO
2344 * if there was some data left in SCSI FIFO
2345 */
2346 d_left_counter =
2347 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2348 0x1F);
2349 if (srb->dcb->sync_period & WIDE_SYNC)
2350 d_left_counter <<= 1;
2351 /*
2352 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2353 * so need to *= 2
2354 * KG: Seems to be correct ...
2355 */
2356 }
2357 #endif
2358 /* KG: This should not be needed any more! */
2359 if (d_left_counter == 0
2360 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2361 #if 0
2362 int ctr = 6000000;
2363 u8 TempDMAstatus;
2364 do {
2365 TempDMAstatus =
2366 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2367 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2368 if (!ctr)
2369 dprintkl(KERN_ERR,
2370 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2371 srb->total_xfer_length = 0;
2372 #endif
2373 srb->total_xfer_length = d_left_counter;
2374 } else { /* phase changed */
2375 /*
2376 * parsing the case:
2377 * when a transfer not yet complete
2378 * but be disconnected by target
2379 * if transfer not yet complete
2380 * there were some data residue in SCSI FIFO or
2381 * SCSI transfer counter not empty
2382 */
2383 sg_update_list(srb, d_left_counter);
2384 }
2385 }
2386 /* KG: The target may decide to disconnect: Empty FIFO before! */
2387 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2388 cleanup_after_transfer(acb, srb);
2389 }
2390 }
2391
2392
2393 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2394 u16 *pscsi_status)
2395 {
2396 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2397 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2398 data_io_transfer(acb, srb, XFERDATAIN);
2399 }
2400
2401
2402 static void data_io_transfer(struct AdapterCtlBlk *acb,
2403 struct ScsiReqBlk *srb, u16 io_dir)
2404 {
2405 struct DeviceCtlBlk *dcb = srb->dcb;
2406 u8 bval;
2407 dprintkdbg(DBG_0,
2408 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2409 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun,
2410 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2411 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2412 if (srb == acb->tmp_srb)
2413 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2414 if (srb->sg_index >= srb->sg_count) {
2415 /* can't happen? out of bounds error */
2416 return;
2417 }
2418
2419 if (srb->total_xfer_length > DC395x_LASTPIO) {
2420 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2421 /*
2422 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2423 * Maybe, even ABORTXFER would be appropriate
2424 */
2425 if (dma_status & XFERPENDING) {
2426 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2427 "Expect trouble!\n");
2428 dump_register_info(acb, dcb, srb);
2429 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2430 }
2431 /* clear_fifo(acb, "IO"); */
2432 /*
2433 * load what physical address of Scatter/Gather list table
2434 * want to be transfer
2435 */
2436 srb->state |= SRB_DATA_XFER;
2437 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2438 if (scsi_sg_count(srb->cmd)) { /* with S/G */
2439 io_dir |= DMACMD_SG;
2440 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2441 srb->sg_bus_addr +
2442 sizeof(struct SGentry) *
2443 srb->sg_index);
2444 /* load how many bytes in the sg list table */
2445 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2446 ((u32)(srb->sg_count -
2447 srb->sg_index) << 3));
2448 } else { /* without S/G */
2449 io_dir &= ~DMACMD_SG;
2450 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2451 srb->segment_x[0].address);
2452 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2453 srb->segment_x[0].length);
2454 }
2455 /* load total transfer length (24bits) max value 16Mbyte */
2456 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2457 srb->total_xfer_length);
2458 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2459 if (io_dir & DMACMD_DIR) { /* read */
2460 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2461 SCMD_DMA_IN);
2462 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2463 } else {
2464 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2465 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2466 SCMD_DMA_OUT);
2467 }
2468
2469 }
2470 #if DC395x_LASTPIO
2471 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2472 /*
2473 * load what physical address of Scatter/Gather list table
2474 * want to be transfer
2475 */
2476 srb->state |= SRB_DATA_XFER;
2477 /* load total transfer length (24bits) max value 16Mbyte */
2478 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2479 srb->total_xfer_length);
2480 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2481 if (io_dir & DMACMD_DIR) { /* read */
2482 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2483 SCMD_FIFO_IN);
2484 } else { /* write */
2485 int ln = srb->total_xfer_length;
2486 size_t left_io = srb->total_xfer_length;
2487
2488 if (srb->dcb->sync_period & WIDE_SYNC)
2489 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2490 CFG2_WIDEFIFO);
2491
2492 while (left_io) {
2493 unsigned char *virt, *base = NULL;
2494 unsigned long flags = 0;
2495 size_t len = left_io;
2496 size_t offset = srb->request_length - left_io;
2497
2498 local_irq_save(flags);
2499 /* Again, max 4 bytes */
2500 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2501 srb->sg_count, &offset, &len);
2502 virt = base + offset;
2503
2504 left_io -= len;
2505
2506 while (len--) {
2507 if (debug_enabled(DBG_PIO))
2508 printk(" %02x", *virt);
2509
2510 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2511
2512 sg_subtract_one(srb);
2513 }
2514
2515 scsi_kunmap_atomic_sg(base);
2516 local_irq_restore(flags);
2517 }
2518 if (srb->dcb->sync_period & WIDE_SYNC) {
2519 if (ln % 2) {
2520 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2521 if (debug_enabled(DBG_PIO))
2522 printk(" |00");
2523 }
2524 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2525 }
2526 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2527 if (debug_enabled(DBG_PIO))
2528 printk("\n");
2529 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2530 SCMD_FIFO_OUT);
2531 }
2532 }
2533 #endif /* DC395x_LASTPIO */
2534 else { /* xfer pad */
2535 u8 data = 0, data2 = 0;
2536 if (srb->sg_count) {
2537 srb->adapter_status = H_OVER_UNDER_RUN;
2538 srb->status |= OVER_RUN;
2539 }
2540 /*
2541 * KG: despite the fact that we are using 16 bits I/O ops
2542 * the SCSI FIFO is only 8 bits according to the docs
2543 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2544 */
2545 if (dcb->sync_period & WIDE_SYNC) {
2546 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2547 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2548 CFG2_WIDEFIFO);
2549 if (io_dir & DMACMD_DIR) {
2550 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2551 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2552 } else {
2553 /* Danger, Robinson: If you find KGs
2554 * scattered over the wide disk, the driver
2555 * or chip is to blame :-( */
2556 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2557 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2558 }
2559 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2560 } else {
2561 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2562 /* Danger, Robinson: If you find a collection of Ks on your disk
2563 * something broke :-( */
2564 if (io_dir & DMACMD_DIR)
2565 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2566 else
2567 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2568 }
2569 srb->state |= SRB_XFERPAD;
2570 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2571 /* SCSI command */
2572 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2573 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2574 }
2575 }
2576
2577
2578 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2579 u16 *pscsi_status)
2580 {
2581 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2582 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2583 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2584 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2585 srb->state = SRB_COMPLETED;
2586 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2587 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2588 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2589 }
2590
2591
2592 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2593 u16 *pscsi_status)
2594 {
2595 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2596 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2597 srb->state = SRB_STATUS;
2598 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2599 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2600 }
2601
2602
2603 /* Check if the message is complete */
2604 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2605 {
2606 if (*msgbuf == EXTENDED_MESSAGE) {
2607 if (len < 2)
2608 return 0;
2609 if (len < msgbuf[1] + 2)
2610 return 0;
2611 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2612 if (len < 2)
2613 return 0;
2614 return 1;
2615 }
2616
2617 /* reject_msg */
2618 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2619 struct ScsiReqBlk *srb)
2620 {
2621 srb->msgout_buf[0] = MESSAGE_REJECT;
2622 srb->msg_count = 1;
2623 DC395x_ENABLE_MSGOUT;
2624 srb->state &= ~SRB_MSGIN;
2625 srb->state |= SRB_MSGOUT;
2626 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2627 srb->msgin_buf[0],
2628 srb->dcb->target_id, srb->dcb->target_lun);
2629 }
2630
2631
2632 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2633 struct DeviceCtlBlk *dcb, u8 tag)
2634 {
2635 struct ScsiReqBlk *srb = NULL;
2636 struct ScsiReqBlk *i;
2637 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2638 srb->cmd, tag, srb);
2639
2640 if (!(dcb->tag_mask & (1 << tag)))
2641 dprintkl(KERN_DEBUG,
2642 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2643 dcb->tag_mask, tag);
2644
2645 if (list_empty(&dcb->srb_going_list))
2646 goto mingx0;
2647 list_for_each_entry(i, &dcb->srb_going_list, list) {
2648 if (i->tag_number == tag) {
2649 srb = i;
2650 break;
2651 }
2652 }
2653 if (!srb)
2654 goto mingx0;
2655
2656 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2657 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2658 if (dcb->flag & ABORT_DEV_) {
2659 /*srb->state = SRB_ABORT_SENT; */
2660 enable_msgout_abort(acb, srb);
2661 }
2662
2663 if (!(srb->state & SRB_DISCONNECT))
2664 goto mingx0;
2665
2666 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2667 srb->state |= dcb->active_srb->state;
2668 srb->state |= SRB_DATA_XFER;
2669 dcb->active_srb = srb;
2670 /* How can we make the DORS happy? */
2671 return srb;
2672
2673 mingx0:
2674 srb = acb->tmp_srb;
2675 srb->state = SRB_UNEXPECT_RESEL;
2676 dcb->active_srb = srb;
2677 srb->msgout_buf[0] = MSG_ABORT_TAG;
2678 srb->msg_count = 1;
2679 DC395x_ENABLE_MSGOUT;
2680 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2681 return srb;
2682 }
2683
2684
2685 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2686 struct DeviceCtlBlk *dcb)
2687 {
2688 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2689 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2690 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2691 set_xfer_rate(acb, dcb);
2692 }
2693
2694
2695 /* set async transfer mode */
2696 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2697 {
2698 struct DeviceCtlBlk *dcb = srb->dcb;
2699 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2700 dcb->target_id, dcb->target_lun);
2701
2702 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2703 dcb->sync_mode |= SYNC_NEGO_DONE;
2704 /*dcb->sync_period &= 0; */
2705 dcb->sync_offset = 0;
2706 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2707 srb->state &= ~SRB_DO_SYNC_NEGO;
2708 reprogram_regs(acb, dcb);
2709 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2710 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2711 build_wdtr(acb, dcb, srb);
2712 DC395x_ENABLE_MSGOUT;
2713 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2714 }
2715 }
2716
2717
2718 /* set sync transfer mode */
2719 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2720 {
2721 struct DeviceCtlBlk *dcb = srb->dcb;
2722 u8 bval;
2723 int fact;
2724 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2725 "(%02i.%01i MHz) Offset %i\n",
2726 dcb->target_id, srb->msgin_buf[3] << 2,
2727 (250 / srb->msgin_buf[3]),
2728 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2729 srb->msgin_buf[4]);
2730
2731 if (srb->msgin_buf[4] > 15)
2732 srb->msgin_buf[4] = 15;
2733 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2734 dcb->sync_offset = 0;
2735 else if (dcb->sync_offset == 0)
2736 dcb->sync_offset = srb->msgin_buf[4];
2737 if (srb->msgin_buf[4] > dcb->sync_offset)
2738 srb->msgin_buf[4] = dcb->sync_offset;
2739 else
2740 dcb->sync_offset = srb->msgin_buf[4];
2741 bval = 0;
2742 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2743 || dcb->min_nego_period >
2744 clock_period[bval]))
2745 bval++;
2746 if (srb->msgin_buf[3] < clock_period[bval])
2747 dprintkl(KERN_INFO,
2748 "msgin_set_sync: Increase sync nego period to %ins\n",
2749 clock_period[bval] << 2);
2750 srb->msgin_buf[3] = clock_period[bval];
2751 dcb->sync_period &= 0xf0;
2752 dcb->sync_period |= ALT_SYNC | bval;
2753 dcb->min_nego_period = srb->msgin_buf[3];
2754
2755 if (dcb->sync_period & WIDE_SYNC)
2756 fact = 500;
2757 else
2758 fact = 250;
2759
2760 dprintkl(KERN_INFO,
2761 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2762 dcb->target_id, (fact == 500) ? "Wide16" : "",
2763 dcb->min_nego_period << 2, dcb->sync_offset,
2764 (fact / dcb->min_nego_period),
2765 ((fact % dcb->min_nego_period) * 10 +
2766 dcb->min_nego_period / 2) / dcb->min_nego_period);
2767
2768 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2769 /* Reply with corrected SDTR Message */
2770 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2771 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2772
2773 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2774 srb->msg_count = 5;
2775 DC395x_ENABLE_MSGOUT;
2776 dcb->sync_mode |= SYNC_NEGO_DONE;
2777 } else {
2778 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2779 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2780 build_wdtr(acb, dcb, srb);
2781 DC395x_ENABLE_MSGOUT;
2782 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2783 }
2784 }
2785 srb->state &= ~SRB_DO_SYNC_NEGO;
2786 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2787
2788 reprogram_regs(acb, dcb);
2789 }
2790
2791
2792 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2793 struct ScsiReqBlk *srb)
2794 {
2795 struct DeviceCtlBlk *dcb = srb->dcb;
2796 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2797
2798 dcb->sync_period &= ~WIDE_SYNC;
2799 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2800 dcb->sync_mode |= WIDE_NEGO_DONE;
2801 srb->state &= ~SRB_DO_WIDE_NEGO;
2802 reprogram_regs(acb, dcb);
2803 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2804 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2805 build_sdtr(acb, dcb, srb);
2806 DC395x_ENABLE_MSGOUT;
2807 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2808 }
2809 }
2810
2811 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2812 {
2813 struct DeviceCtlBlk *dcb = srb->dcb;
2814 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2815 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2816 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2817
2818 if (srb->msgin_buf[3] > wide)
2819 srb->msgin_buf[3] = wide;
2820 /* Completed */
2821 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2822 dprintkl(KERN_DEBUG,
2823 "msgin_set_wide: Wide nego initiated <%02i>\n",
2824 dcb->target_id);
2825 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2826 srb->msg_count = 4;
2827 srb->state |= SRB_DO_WIDE_NEGO;
2828 DC395x_ENABLE_MSGOUT;
2829 }
2830
2831 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2832 if (srb->msgin_buf[3] > 0)
2833 dcb->sync_period |= WIDE_SYNC;
2834 else
2835 dcb->sync_period &= ~WIDE_SYNC;
2836 srb->state &= ~SRB_DO_WIDE_NEGO;
2837 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2838 dprintkdbg(DBG_1,
2839 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2840 (8 << srb->msgin_buf[3]), dcb->target_id);
2841 reprogram_regs(acb, dcb);
2842 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2843 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2844 build_sdtr(acb, dcb, srb);
2845 DC395x_ENABLE_MSGOUT;
2846 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2847 }
2848 }
2849
2850
2851 /*
2852 * extended message codes:
2853 *
2854 * code description
2855 *
2856 * 02h Reserved
2857 * 00h MODIFY DATA POINTER
2858 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2859 * 03h WIDE DATA TRANSFER REQUEST
2860 * 04h - 7Fh Reserved
2861 * 80h - FFh Vendor specific
2862 */
2863 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2864 u16 *pscsi_status)
2865 {
2866 struct DeviceCtlBlk *dcb = acb->active_dcb;
2867 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2868
2869 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2870 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2871 /* Now eval the msg */
2872 switch (srb->msgin_buf[0]) {
2873 case DISCONNECT:
2874 srb->state = SRB_DISCONNECT;
2875 break;
2876
2877 case SIMPLE_QUEUE_TAG:
2878 case HEAD_OF_QUEUE_TAG:
2879 case ORDERED_QUEUE_TAG:
2880 srb =
2881 msgin_qtag(acb, dcb,
2882 srb->msgin_buf[1]);
2883 break;
2884
2885 case MESSAGE_REJECT:
2886 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2887 DO_CLRATN | DO_DATALATCH);
2888 /* A sync nego message was rejected ! */
2889 if (srb->state & SRB_DO_SYNC_NEGO) {
2890 msgin_set_async(acb, srb);
2891 break;
2892 }
2893 /* A wide nego message was rejected ! */
2894 if (srb->state & SRB_DO_WIDE_NEGO) {
2895 msgin_set_nowide(acb, srb);
2896 break;
2897 }
2898 enable_msgout_abort(acb, srb);
2899 /*srb->state |= SRB_ABORT_SENT */
2900 break;
2901
2902 case EXTENDED_MESSAGE:
2903 /* SDTR */
2904 if (srb->msgin_buf[1] == 3
2905 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2906 msgin_set_sync(acb, srb);
2907 break;
2908 }
2909 /* WDTR */
2910 if (srb->msgin_buf[1] == 2
2911 && srb->msgin_buf[2] == EXTENDED_WDTR
2912 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2913 msgin_set_wide(acb, srb);
2914 break;
2915 }
2916 msgin_reject(acb, srb);
2917 break;
2918
2919 case MSG_IGNOREWIDE:
2920 /* Discard wide residual */
2921 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2922 break;
2923
2924 case COMMAND_COMPLETE:
2925 /* nothing has to be done */
2926 break;
2927
2928 case SAVE_POINTERS:
2929 /*
2930 * SAVE POINTER may be ignored as we have the struct
2931 * ScsiReqBlk* associated with the scsi command.
2932 */
2933 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2934 "SAVE POINTER rem=%i Ignore\n",
2935 srb->cmd, srb->total_xfer_length);
2936 break;
2937
2938 case RESTORE_POINTERS:
2939 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2940 break;
2941
2942 case ABORT:
2943 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2944 "<%02i-%i> ABORT msg\n",
2945 srb->cmd, dcb->target_id,
2946 dcb->target_lun);
2947 dcb->flag |= ABORT_DEV_;
2948 enable_msgout_abort(acb, srb);
2949 break;
2950
2951 default:
2952 /* reject unknown messages */
2953 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2954 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2955 srb->msg_count = 1;
2956 srb->msgout_buf[0] = dcb->identify_msg;
2957 DC395x_ENABLE_MSGOUT;
2958 srb->state |= SRB_MSGOUT;
2959 /*break; */
2960 }
2961 msgin_reject(acb, srb);
2962 }
2963
2964 /* Clear counter and MsgIn state */
2965 srb->state &= ~SRB_MSGIN;
2966 acb->msg_len = 0;
2967 }
2968 *pscsi_status = PH_BUS_FREE;
2969 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2970 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2971 }
2972
2973
2974 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2975 u16 *pscsi_status)
2976 {
2977 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2978 clear_fifo(acb, "msgin_phase1");
2979 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2980 if (!(srb->state & SRB_MSGIN)) {
2981 srb->state &= ~SRB_DISCONNECT;
2982 srb->state |= SRB_MSGIN;
2983 }
2984 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2985 /* SCSI command */
2986 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2987 }
2988
2989
2990 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2991 u16 *pscsi_status)
2992 {
2993 }
2994
2995
2996 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2997 u16 *pscsi_status)
2998 {
2999 }
3000
3001
3002 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3003 {
3004 struct DeviceCtlBlk *i;
3005
3006 /* set all lun device's period, offset */
3007 if (dcb->identify_msg & 0x07)
3008 return;
3009
3010 if (acb->scan_devices) {
3011 current_sync_offset = dcb->sync_offset;
3012 return;
3013 }
3014
3015 list_for_each_entry(i, &acb->dcb_list, list)
3016 if (i->target_id == dcb->target_id) {
3017 i->sync_period = dcb->sync_period;
3018 i->sync_offset = dcb->sync_offset;
3019 i->sync_mode = dcb->sync_mode;
3020 i->min_nego_period = dcb->min_nego_period;
3021 }
3022 }
3023
3024
3025 static void disconnect(struct AdapterCtlBlk *acb)
3026 {
3027 struct DeviceCtlBlk *dcb = acb->active_dcb;
3028 struct ScsiReqBlk *srb;
3029
3030 if (!dcb) {
3031 dprintkl(KERN_ERR, "disconnect: No such device\n");
3032 udelay(500);
3033 /* Suspend queue for a while */
3034 acb->scsi_host->last_reset =
3035 jiffies + HZ / 2 +
3036 HZ * acb->eeprom.delay_time;
3037 clear_fifo(acb, "disconnectEx");
3038 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3039 return;
3040 }
3041 srb = dcb->active_srb;
3042 acb->active_dcb = NULL;
3043 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
3044
3045 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3046 clear_fifo(acb, "disconnect");
3047 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3048 if (srb->state & SRB_UNEXPECT_RESEL) {
3049 dprintkl(KERN_ERR,
3050 "disconnect: Unexpected reselection <%02i-%i>\n",
3051 dcb->target_id, dcb->target_lun);
3052 srb->state = 0;
3053 waiting_process_next(acb);
3054 } else if (srb->state & SRB_ABORT_SENT) {
3055 dcb->flag &= ~ABORT_DEV_;
3056 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3057 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3058 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3059 waiting_process_next(acb);
3060 } else {
3061 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3062 || !(srb->
3063 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3064 /*
3065 * Selection time out
3066 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3067 */
3068 /* Unexp. Disc / Sel Timeout */
3069 if (srb->state != SRB_START_
3070 && srb->state != SRB_MSGOUT) {
3071 srb->state = SRB_READY;
3072 dprintkl(KERN_DEBUG,
3073 "disconnect: (0x%p) Unexpected\n",
3074 srb->cmd);
3075 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3076 goto disc1;
3077 } else {
3078 /* Normal selection timeout */
3079 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
3080 "<%02i-%i> SelTO\n", srb->cmd,
3081 dcb->target_id, dcb->target_lun);
3082 if (srb->retry_count++ > DC395x_MAX_RETRIES
3083 || acb->scan_devices) {
3084 srb->target_status =
3085 SCSI_STAT_SEL_TIMEOUT;
3086 goto disc1;
3087 }
3088 free_tag(dcb, srb);
3089 srb_going_to_waiting_move(dcb, srb);
3090 dprintkdbg(DBG_KG,
3091 "disconnect: (0x%p) Retry\n",
3092 srb->cmd);
3093 waiting_set_timer(acb, HZ / 20);
3094 }
3095 } else if (srb->state & SRB_DISCONNECT) {
3096 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3097 /*
3098 * SRB_DISCONNECT (This is what we expect!)
3099 */
3100 if (bval & 0x40) {
3101 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3102 " 0x%02x: ACK set! Other controllers?\n",
3103 bval);
3104 /* It could come from another initiator, therefore don't do much ! */
3105 } else
3106 waiting_process_next(acb);
3107 } else if (srb->state & SRB_COMPLETED) {
3108 disc1:
3109 /*
3110 ** SRB_COMPLETED
3111 */
3112 free_tag(dcb, srb);
3113 dcb->active_srb = NULL;
3114 srb->state = SRB_FREE;
3115 srb_done(acb, dcb, srb);
3116 }
3117 }
3118 }
3119
3120
3121 static void reselect(struct AdapterCtlBlk *acb)
3122 {
3123 struct DeviceCtlBlk *dcb = acb->active_dcb;
3124 struct ScsiReqBlk *srb = NULL;
3125 u16 rsel_tar_lun_id;
3126 u8 id, lun;
3127 u8 arblostflag = 0;
3128 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3129
3130 clear_fifo(acb, "reselect");
3131 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3132 /* Read Reselected Target ID and LUN */
3133 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3134 if (dcb) { /* Arbitration lost but Reselection win */
3135 srb = dcb->active_srb;
3136 if (!srb) {
3137 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3138 "but active_srb == NULL\n");
3139 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3140 return;
3141 }
3142 /* Why the if ? */
3143 if (!acb->scan_devices) {
3144 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3145 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3146 srb->cmd, dcb->target_id,
3147 dcb->target_lun, rsel_tar_lun_id,
3148 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3149 arblostflag = 1;
3150 /*srb->state |= SRB_DISCONNECT; */
3151
3152 srb->state = SRB_READY;
3153 free_tag(dcb, srb);
3154 srb_going_to_waiting_move(dcb, srb);
3155 waiting_set_timer(acb, HZ / 20);
3156
3157 /* return; */
3158 }
3159 }
3160 /* Read Reselected Target Id and LUN */
3161 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3162 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3163 "Got %i!\n", rsel_tar_lun_id);
3164 id = rsel_tar_lun_id & 0xff;
3165 lun = (rsel_tar_lun_id >> 8) & 7;
3166 dcb = find_dcb(acb, id, lun);
3167 if (!dcb) {
3168 dprintkl(KERN_ERR, "reselect: From non existent device "
3169 "<%02i-%i>\n", id, lun);
3170 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3171 return;
3172 }
3173 acb->active_dcb = dcb;
3174
3175 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3176 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3177 "disconnection? <%02i-%i>\n",
3178 dcb->target_id, dcb->target_lun);
3179
3180 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3181 srb = acb->tmp_srb;
3182 dcb->active_srb = srb;
3183 } else {
3184 /* There can be only one! */
3185 srb = dcb->active_srb;
3186 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3187 /*
3188 * abort command
3189 */
3190 dprintkl(KERN_DEBUG,
3191 "reselect: w/o disconnected cmds <%02i-%i>\n",
3192 dcb->target_id, dcb->target_lun);
3193 srb = acb->tmp_srb;
3194 srb->state = SRB_UNEXPECT_RESEL;
3195 dcb->active_srb = srb;
3196 enable_msgout_abort(acb, srb);
3197 } else {
3198 if (dcb->flag & ABORT_DEV_) {
3199 /*srb->state = SRB_ABORT_SENT; */
3200 enable_msgout_abort(acb, srb);
3201 } else
3202 srb->state = SRB_DATA_XFER;
3203
3204 }
3205 }
3206 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3207
3208 /* Program HA ID, target ID, period and offset */
3209 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3210 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3211 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3212 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3213 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3214 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3215 /* SCSI command */
3216 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3217 }
3218
3219
3220 static inline u8 tagq_blacklist(char *name)
3221 {
3222 #ifndef DC395x_NO_TAGQ
3223 #if 0
3224 u8 i;
3225 for (i = 0; i < BADDEVCNT; i++)
3226 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3227 return 1;
3228 #endif
3229 return 0;
3230 #else
3231 return 1;
3232 #endif
3233 }
3234
3235
3236 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3237 {
3238 /* Check for SCSI format (ANSI and Response data format) */
3239 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3240 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3241 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3242 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3243 /* ((dcb->dev_type == TYPE_DISK)
3244 || (dcb->dev_type == TYPE_MOD)) && */
3245 !tagq_blacklist(((char *)ptr) + 8)) {
3246 if (dcb->max_command == 1)
3247 dcb->max_command =
3248 dcb->acb->tag_max_num;
3249 dcb->sync_mode |= EN_TAG_QUEUEING;
3250 /*dcb->tag_mask = 0; */
3251 } else
3252 dcb->max_command = 1;
3253 }
3254 }
3255
3256
3257 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3258 struct ScsiInqData *ptr)
3259 {
3260 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3261 dcb->dev_type = bval1;
3262 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3263 disc_tagq_set(dcb, ptr);
3264 }
3265
3266
3267 /* unmap mapped pci regions from SRB */
3268 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3269 {
3270 struct scsi_cmnd *cmd = srb->cmd;
3271 enum dma_data_direction dir = cmd->sc_data_direction;
3272
3273 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3274 /* unmap DC395x SG list */
3275 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3276 srb->sg_bus_addr, SEGMENTX_LEN);
3277 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3278 SEGMENTX_LEN,
3279 PCI_DMA_TODEVICE);
3280 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3281 scsi_sg_count(cmd), scsi_bufflen(cmd));
3282 /* unmap the sg segments */
3283 scsi_dma_unmap(cmd);
3284 }
3285 }
3286
3287
3288 /* unmap mapped pci sense buffer from SRB */
3289 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3290 struct ScsiReqBlk *srb)
3291 {
3292 if (!(srb->flag & AUTO_REQSENSE))
3293 return;
3294 /* Unmap sense buffer */
3295 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3296 srb->segment_x[0].address);
3297 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3298 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3299 /* Restore SG stuff */
3300 srb->total_xfer_length = srb->xferred;
3301 srb->segment_x[0].address =
3302 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3303 srb->segment_x[0].length =
3304 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3305 }
3306
3307
3308 /*
3309 * Complete execution of a SCSI command
3310 * Signal completion to the generic SCSI driver
3311 */
3312 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3313 struct ScsiReqBlk *srb)
3314 {
3315 u8 tempcnt, status;
3316 struct scsi_cmnd *cmd = srb->cmd;
3317 enum dma_data_direction dir = cmd->sc_data_direction;
3318 int ckc_only = 1;
3319
3320 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3321 srb->cmd->device->id, srb->cmd->device->lun);
3322 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3323 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3324 scsi_sgtalbe(cmd));
3325 status = srb->target_status;
3326 if (srb->flag & AUTO_REQSENSE) {
3327 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3328 pci_unmap_srb_sense(acb, srb);
3329 /*
3330 ** target status..........................
3331 */
3332 srb->flag &= ~AUTO_REQSENSE;
3333 srb->adapter_status = 0;
3334 srb->target_status = CHECK_CONDITION << 1;
3335 if (debug_enabled(DBG_1)) {
3336 switch (cmd->sense_buffer[2] & 0x0f) {
3337 case NOT_READY:
3338 dprintkl(KERN_DEBUG,
3339 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3340 cmd->cmnd[0], dcb->target_id,
3341 dcb->target_lun, status, acb->scan_devices);
3342 break;
3343 case UNIT_ATTENTION:
3344 dprintkl(KERN_DEBUG,
3345 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3346 cmd->cmnd[0], dcb->target_id,
3347 dcb->target_lun, status, acb->scan_devices);
3348 break;
3349 case ILLEGAL_REQUEST:
3350 dprintkl(KERN_DEBUG,
3351 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3352 cmd->cmnd[0], dcb->target_id,
3353 dcb->target_lun, status, acb->scan_devices);
3354 break;
3355 case MEDIUM_ERROR:
3356 dprintkl(KERN_DEBUG,
3357 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3358 cmd->cmnd[0], dcb->target_id,
3359 dcb->target_lun, status, acb->scan_devices);
3360 break;
3361 case HARDWARE_ERROR:
3362 dprintkl(KERN_DEBUG,
3363 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3364 cmd->cmnd[0], dcb->target_id,
3365 dcb->target_lun, status, acb->scan_devices);
3366 break;
3367 }
3368 if (cmd->sense_buffer[7] >= 6)
3369 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3370 "(0x%08x 0x%08x)\n",
3371 cmd->sense_buffer[2], cmd->sense_buffer[12],
3372 cmd->sense_buffer[13],
3373 *((unsigned int *)(cmd->sense_buffer + 3)),
3374 *((unsigned int *)(cmd->sense_buffer + 8)));
3375 else
3376 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3377 cmd->sense_buffer[2],
3378 *((unsigned int *)(cmd->sense_buffer + 3)));
3379 }
3380
3381 if (status == (CHECK_CONDITION << 1)) {
3382 cmd->result = DID_BAD_TARGET << 16;
3383 goto ckc_e;
3384 }
3385 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3386
3387 if (srb->total_xfer_length
3388 && srb->total_xfer_length >= cmd->underflow)
3389 cmd->result =
3390 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3391 srb->end_message, CHECK_CONDITION);
3392 /*SET_RES_DID(cmd->result,DID_OK) */
3393 else
3394 cmd->result =
3395 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3396 srb->end_message, CHECK_CONDITION);
3397
3398 goto ckc_e;
3399 }
3400
3401 /*************************************************************/
3402 if (status) {
3403 /*
3404 * target status..........................
3405 */
3406 if (status_byte(status) == CHECK_CONDITION) {
3407 request_sense(acb, dcb, srb);
3408 return;
3409 } else if (status_byte(status) == QUEUE_FULL) {
3410 tempcnt = (u8)list_size(&dcb->srb_going_list);
3411 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3412 dcb->target_id, dcb->target_lun, tempcnt);
3413 if (tempcnt > 1)
3414 tempcnt--;
3415 dcb->max_command = tempcnt;
3416 free_tag(dcb, srb);
3417 srb_going_to_waiting_move(dcb, srb);
3418 waiting_set_timer(acb, HZ / 20);
3419 srb->adapter_status = 0;
3420 srb->target_status = 0;
3421 return;
3422 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3423 srb->adapter_status = H_SEL_TIMEOUT;
3424 srb->target_status = 0;
3425 cmd->result = DID_NO_CONNECT << 16;
3426 } else {
3427 srb->adapter_status = 0;
3428 SET_RES_DID(cmd->result, DID_ERROR);
3429 SET_RES_MSG(cmd->result, srb->end_message);
3430 SET_RES_TARGET(cmd->result, status);
3431
3432 }
3433 } else {
3434 /*
3435 ** process initiator status..........................
3436 */
3437 status = srb->adapter_status;
3438 if (status & H_OVER_UNDER_RUN) {
3439 srb->target_status = 0;
3440 SET_RES_DID(cmd->result, DID_OK);
3441 SET_RES_MSG(cmd->result, srb->end_message);
3442 } else if (srb->status & PARITY_ERROR) {
3443 SET_RES_DID(cmd->result, DID_PARITY);
3444 SET_RES_MSG(cmd->result, srb->end_message);
3445 } else { /* No error */
3446
3447 srb->adapter_status = 0;
3448 srb->target_status = 0;
3449 SET_RES_DID(cmd->result, DID_OK);
3450 }
3451 }
3452
3453 if (dir != PCI_DMA_NONE && scsi_sg_count(cmd))
3454 pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd),
3455 scsi_sg_count(cmd), dir);
3456
3457 ckc_only = 0;
3458 /* Check Error Conditions */
3459 ckc_e:
3460
3461 if (cmd->cmnd[0] == INQUIRY) {
3462 unsigned char *base = NULL;
3463 struct ScsiInqData *ptr;
3464 unsigned long flags = 0;
3465 struct scatterlist* sg = scsi_sglist(cmd);
3466 size_t offset = 0, len = sizeof(struct ScsiInqData);
3467
3468 local_irq_save(flags);
3469 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3470 ptr = (struct ScsiInqData *)(base + offset);
3471
3472 if (!ckc_only && (cmd->result & RES_DID) == 0
3473 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3474 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3475 dcb->inquiry7 = ptr->Flags;
3476
3477 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3478 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3479 if ((cmd->result == (DID_OK << 16)
3480 || status_byte(cmd->result) &
3481 CHECK_CONDITION)) {
3482 if (!dcb->init_tcq_flag) {
3483 add_dev(acb, dcb, ptr);
3484 dcb->init_tcq_flag = 1;
3485 }
3486 }
3487
3488 scsi_kunmap_atomic_sg(base);
3489 local_irq_restore(flags);
3490 }
3491
3492 /* Here is the info for Doug Gilbert's sg3 ... */
3493 scsi_set_resid(cmd, srb->total_xfer_length);
3494 /* This may be interpreted by sb. or not ... */
3495 cmd->SCp.this_residual = srb->total_xfer_length;
3496 cmd->SCp.buffers_residual = 0;
3497 if (debug_enabled(DBG_KG)) {
3498 if (srb->total_xfer_length)
3499 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3500 "cmnd=0x%02x Missed %i bytes\n",
3501 cmd, cmd->device->id, cmd->device->lun,
3502 cmd->cmnd[0], srb->total_xfer_length);
3503 }
3504
3505 srb_going_remove(dcb, srb);
3506 /* Add to free list */
3507 if (srb == acb->tmp_srb)
3508 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3509 else {
3510 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3511 cmd, cmd->result);
3512 srb_free_insert(acb, srb);
3513 }
3514 pci_unmap_srb(acb, srb);
3515
3516 cmd->scsi_done(cmd);
3517 waiting_process_next(acb);
3518 }
3519
3520
3521 /* abort all cmds in our queues */
3522 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3523 struct scsi_cmnd *cmd, u8 force)
3524 {
3525 struct DeviceCtlBlk *dcb;
3526 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3527
3528 list_for_each_entry(dcb, &acb->dcb_list, list) {
3529 struct ScsiReqBlk *srb;
3530 struct ScsiReqBlk *tmp;
3531 struct scsi_cmnd *p;
3532
3533 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3534 enum dma_data_direction dir;
3535 int result;
3536
3537 p = srb->cmd;
3538 dir = p->sc_data_direction;
3539 result = MK_RES(0, did_flag, 0, 0);
3540 printk("G:%p(%02i-%i) ", p,
3541 p->device->id, p->device->lun);
3542 srb_going_remove(dcb, srb);
3543 free_tag(dcb, srb);
3544 srb_free_insert(acb, srb);
3545 p->result = result;
3546 pci_unmap_srb_sense(acb, srb);
3547 pci_unmap_srb(acb, srb);
3548 if (force) {
3549 /* For new EH, we normally don't need to give commands back,
3550 * as they all complete or all time out */
3551 p->scsi_done(p);
3552 }
3553 }
3554 if (!list_empty(&dcb->srb_going_list))
3555 dprintkl(KERN_DEBUG,
3556 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3557 dcb->target_id, dcb->target_lun);
3558 if (dcb->tag_mask)
3559 dprintkl(KERN_DEBUG,
3560 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3561 dcb->target_id, dcb->target_lun,
3562 dcb->tag_mask);
3563
3564 /* Waiting queue */
3565 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3566 int result;
3567 p = srb->cmd;
3568
3569 result = MK_RES(0, did_flag, 0, 0);
3570 printk("W:%p<%02i-%i>", p, p->device->id,
3571 p->device->lun);
3572 srb_waiting_remove(dcb, srb);
3573 srb_free_insert(acb, srb);
3574 p->result = result;
3575 pci_unmap_srb_sense(acb, srb);
3576 pci_unmap_srb(acb, srb);
3577 if (force) {
3578 /* For new EH, we normally don't need to give commands back,
3579 * as they all complete or all time out */
3580 cmd->scsi_done(cmd);
3581 }
3582 }
3583 if (!list_empty(&dcb->srb_waiting_list))
3584 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3585 list_size(&dcb->srb_waiting_list), dcb->target_id,
3586 dcb->target_lun);
3587 dcb->flag &= ~ABORT_DEV_;
3588 }
3589 printk("\n");
3590 }
3591
3592
3593 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3594 {
3595 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3596 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3597 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3598
3599 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3600 /* nothing */;
3601 }
3602
3603
3604 static void set_basic_config(struct AdapterCtlBlk *acb)
3605 {
3606 u8 bval;
3607 u16 wval;
3608 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3609 if (acb->config & HCC_PARITY)
3610 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3611 else
3612 bval = PHASELATCH | INITIATOR | BLOCKRST;
3613
3614 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3615
3616 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3617 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3618 /* program Host ID */
3619 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3620 /* set ansynchronous transfer */
3621 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3622 /* Turn LED control off */
3623 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3624 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3625 /* DMA config */
3626 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3627 wval |=
3628 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3629 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3630 /* Clear pending interrupt status */
3631 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3632 /* Enable SCSI interrupt */
3633 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3634 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3635 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3636 );
3637 }
3638
3639
3640 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3641 {
3642 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3643 /* delay half a second */
3644 if (timer_pending(&acb->waiting_timer))
3645 del_timer(&acb->waiting_timer);
3646
3647 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3648 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3649 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3650 udelay(500);
3651 /* Maybe we locked up the bus? Then lets wait even longer ... */
3652 acb->scsi_host->last_reset =
3653 jiffies + 5 * HZ / 2 +
3654 HZ * acb->eeprom.delay_time;
3655
3656 clear_fifo(acb, "scsi_reset_detect");
3657 set_basic_config(acb);
3658 /*1.25 */
3659 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3660
3661 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3662 acb->acb_flag |= RESET_DONE;
3663 } else {
3664 acb->acb_flag |= RESET_DETECT;
3665 reset_dev_param(acb);
3666 doing_srb_done(acb, DID_RESET, NULL, 1);
3667 /*DC395x_RecoverSRB( acb ); */
3668 acb->active_dcb = NULL;
3669 acb->acb_flag = 0;
3670 waiting_process_next(acb);
3671 }
3672 }
3673
3674
3675 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3676 struct ScsiReqBlk *srb)
3677 {
3678 struct scsi_cmnd *cmd = srb->cmd;
3679 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3680 cmd, cmd->device->id, cmd->device->lun);
3681
3682 srb->flag |= AUTO_REQSENSE;
3683 srb->adapter_status = 0;
3684 srb->target_status = 0;
3685
3686 /* KG: Can this prevent crap sense data ? */
3687 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3688
3689 /* Save some data */
3690 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3691 srb->segment_x[0].address;
3692 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3693 srb->segment_x[0].length;
3694 srb->xferred = srb->total_xfer_length;
3695 /* srb->segment_x : a one entry of S/G list table */
3696 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3697 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3698 /* Map sense buffer */
3699 srb->segment_x[0].address =
3700 pci_map_single(acb->dev, cmd->sense_buffer,
3701 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3702 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3703 cmd->sense_buffer, srb->segment_x[0].address,
3704 SCSI_SENSE_BUFFERSIZE);
3705 srb->sg_count = 1;
3706 srb->sg_index = 0;
3707
3708 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3709 dprintkl(KERN_DEBUG,
3710 "request_sense: (0x%p) failed <%02i-%i>\n",
3711 srb->cmd, dcb->target_id, dcb->target_lun);
3712 srb_going_to_waiting_move(dcb, srb);
3713 waiting_set_timer(acb, HZ / 100);
3714 }
3715 }
3716
3717
3718 /**
3719 * device_alloc - Allocate a new device instance. This create the
3720 * devices instance and sets up all the data items. The adapter
3721 * instance is required to obtain confiuration information for this
3722 * device. This does *not* add this device to the adapters device
3723 * list.
3724 *
3725 * @acb: The adapter to obtain configuration information from.
3726 * @target: The target for the new device.
3727 * @lun: The lun for the new device.
3728 *
3729 * Return the new device if successful or NULL on failure.
3730 **/
3731 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3732 u8 target, u8 lun)
3733 {
3734 struct NvRamType *eeprom = &acb->eeprom;
3735 u8 period_index = eeprom->target[target].period & 0x07;
3736 struct DeviceCtlBlk *dcb;
3737
3738 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3739 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3740 if (!dcb)
3741 return NULL;
3742 dcb->acb = NULL;
3743 INIT_LIST_HEAD(&dcb->srb_going_list);
3744 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3745 dcb->active_srb = NULL;
3746 dcb->tag_mask = 0;
3747 dcb->max_command = 1;
3748 dcb->target_id = target;
3749 dcb->target_lun = lun;
3750 #ifndef DC395x_NO_DISCONNECT
3751 dcb->identify_msg =
3752 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3753 #else
3754 dcb->identify_msg = IDENTIFY(0, lun);
3755 #endif
3756 dcb->dev_mode = eeprom->target[target].cfg0;
3757 dcb->inquiry7 = 0;
3758 dcb->sync_mode = 0;
3759 dcb->min_nego_period = clock_period[period_index];
3760 dcb->sync_period = 0;
3761 dcb->sync_offset = 0;
3762 dcb->flag = 0;
3763
3764 #ifndef DC395x_NO_WIDE
3765 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3766 && (acb->config & HCC_WIDE_CARD))
3767 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3768 #endif
3769 #ifndef DC395x_NO_SYNC
3770 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3771 if (!(lun) || current_sync_offset)
3772 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3773 #endif
3774 if (dcb->target_lun != 0) {
3775 /* Copy settings */
3776 struct DeviceCtlBlk *p;
3777 list_for_each_entry(p, &acb->dcb_list, list)
3778 if (p->target_id == dcb->target_id)
3779 break;
3780 dprintkdbg(DBG_1,
3781 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3782 dcb->target_id, dcb->target_lun,
3783 p->target_id, p->target_lun);
3784 dcb->sync_mode = p->sync_mode;
3785 dcb->sync_period = p->sync_period;
3786 dcb->min_nego_period = p->min_nego_period;
3787 dcb->sync_offset = p->sync_offset;
3788 dcb->inquiry7 = p->inquiry7;
3789 }
3790 return dcb;
3791 }
3792
3793
3794 /**
3795 * adapter_add_device - Adds the device instance to the adaptor instance.
3796 *
3797 * @acb: The adapter device to be updated
3798 * @dcb: A newly created and initialised device instance to add.
3799 **/
3800 static void adapter_add_device(struct AdapterCtlBlk *acb,
3801 struct DeviceCtlBlk *dcb)
3802 {
3803 /* backpointer to adapter */
3804 dcb->acb = acb;
3805
3806 /* set run_robin to this device if it is currently empty */
3807 if (list_empty(&acb->dcb_list))
3808 acb->dcb_run_robin = dcb;
3809
3810 /* add device to list */
3811 list_add_tail(&dcb->list, &acb->dcb_list);
3812
3813 /* update device maps */
3814 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3815 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3816 }
3817
3818
3819 /**
3820 * adapter_remove_device - Removes the device instance from the adaptor
3821 * instance. The device instance is not check in any way or freed by this.
3822 * The caller is expected to take care of that. This will simply remove the
3823 * device from the adapters data strcutures.
3824 *
3825 * @acb: The adapter device to be updated
3826 * @dcb: A device that has previously been added to the adapter.
3827 **/
3828 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3829 struct DeviceCtlBlk *dcb)
3830 {
3831 struct DeviceCtlBlk *i;
3832 struct DeviceCtlBlk *tmp;
3833 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3834 dcb->target_id, dcb->target_lun);
3835
3836 /* fix up any pointers to this device that we have in the adapter */
3837 if (acb->active_dcb == dcb)
3838 acb->active_dcb = NULL;
3839 if (acb->dcb_run_robin == dcb)
3840 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3841
3842 /* unlink from list */
3843 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3844 if (dcb == i) {
3845 list_del(&i->list);
3846 break;
3847 }
3848
3849 /* clear map and children */
3850 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3851 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3852 dcb->acb = NULL;
3853 }
3854
3855
3856 /**
3857 * adapter_remove_and_free_device - Removes a single device from the adapter
3858 * and then frees the device information.
3859 *
3860 * @acb: The adapter device to be updated
3861 * @dcb: A device that has previously been added to the adapter.
3862 */
3863 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3864 struct DeviceCtlBlk *dcb)
3865 {
3866 if (list_size(&dcb->srb_going_list) > 1) {
3867 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3868 "Won't remove because of %i active requests.\n",
3869 dcb->target_id, dcb->target_lun,
3870 list_size(&dcb->srb_going_list));
3871 return;
3872 }
3873 adapter_remove_device(acb, dcb);
3874 kfree(dcb);
3875 }
3876
3877
3878 /**
3879 * adapter_remove_and_free_all_devices - Removes and frees all of the
3880 * devices associated with the specified adapter.
3881 *
3882 * @acb: The adapter from which all devices should be removed.
3883 **/
3884 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3885 {
3886 struct DeviceCtlBlk *dcb;
3887 struct DeviceCtlBlk *tmp;
3888 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3889 list_size(&acb->dcb_list));
3890
3891 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3892 adapter_remove_and_free_device(acb, dcb);
3893 }
3894
3895
3896 /**
3897 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3898 * scsi device that we need to deal with. We allocate a new device and then
3899 * insert that device into the adapters device list.
3900 *
3901 * @scsi_device: The new scsi device that we need to handle.
3902 **/
3903 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3904 {
3905 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3906 struct DeviceCtlBlk *dcb;
3907
3908 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3909 if (!dcb)
3910 return -ENOMEM;
3911 adapter_add_device(acb, dcb);
3912
3913 return 0;
3914 }
3915
3916
3917 /**
3918 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3919 * device that is going away.
3920 *
3921 * @scsi_device: The new scsi device that we need to handle.
3922 **/
3923 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3924 {
3925 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3926 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3927 if (dcb)
3928 adapter_remove_and_free_device(acb, dcb);
3929 }
3930
3931
3932
3933
3934 /**
3935 * trms1040_wait_30us: wait for 30 us
3936 *
3937 * Waits for 30us (using the chip by the looks of it..)
3938 *
3939 * @io_port: base I/O address
3940 **/
3941 static void __devinit trms1040_wait_30us(unsigned long io_port)
3942 {
3943 /* ScsiPortStallExecution(30); wait 30 us */
3944 outb(5, io_port + TRM_S1040_GEN_TIMER);
3945 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3946 /* nothing */ ;
3947 }
3948
3949
3950 /**
3951 * trms1040_write_cmd - write the secified command and address to
3952 * chip
3953 *
3954 * @io_port: base I/O address
3955 * @cmd: SB + op code (command) to send
3956 * @addr: address to send
3957 **/
3958 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3959 {
3960 int i;
3961 u8 send_data;
3962
3963 /* program SB + OP code */
3964 for (i = 0; i < 3; i++, cmd <<= 1) {
3965 send_data = NVR_SELECT;
3966 if (cmd & 0x04) /* Start from bit 2 */
3967 send_data |= NVR_BITOUT;
3968
3969 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3970 trms1040_wait_30us(io_port);
3971 outb((send_data | NVR_CLOCK),
3972 io_port + TRM_S1040_GEN_NVRAM);
3973 trms1040_wait_30us(io_port);
3974 }
3975
3976 /* send address */
3977 for (i = 0; i < 7; i++, addr <<= 1) {
3978 send_data = NVR_SELECT;
3979 if (addr & 0x40) /* Start from bit 6 */
3980 send_data |= NVR_BITOUT;
3981
3982 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3983 trms1040_wait_30us(io_port);
3984 outb((send_data | NVR_CLOCK),
3985 io_port + TRM_S1040_GEN_NVRAM);
3986 trms1040_wait_30us(io_port);
3987 }
3988 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3989 trms1040_wait_30us(io_port);
3990 }
3991
3992
3993 /**
3994 * trms1040_set_data - store a single byte in the eeprom
3995 *
3996 * Called from write all to write a single byte into the SSEEPROM
3997 * Which is done one bit at a time.
3998 *
3999 * @io_port: base I/O address
4000 * @addr: offset into EEPROM
4001 * @byte: bytes to write
4002 **/
4003 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4004 {
4005 int i;
4006 u8 send_data;
4007
4008 /* Send write command & address */
4009 trms1040_write_cmd(io_port, 0x05, addr);
4010
4011 /* Write data */
4012 for (i = 0; i < 8; i++, byte <<= 1) {
4013 send_data = NVR_SELECT;
4014 if (byte & 0x80) /* Start from bit 7 */
4015 send_data |= NVR_BITOUT;
4016
4017 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4018 trms1040_wait_30us(io_port);
4019 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4020 trms1040_wait_30us(io_port);
4021 }
4022 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4023 trms1040_wait_30us(io_port);
4024
4025 /* Disable chip select */
4026 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4027 trms1040_wait_30us(io_port);
4028
4029 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4030 trms1040_wait_30us(io_port);
4031
4032 /* Wait for write ready */
4033 while (1) {
4034 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4035 trms1040_wait_30us(io_port);
4036
4037 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4038 trms1040_wait_30us(io_port);
4039
4040 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4041 break;
4042 }
4043
4044 /* Disable chip select */
4045 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4046 }
4047
4048
4049 /**
4050 * trms1040_write_all - write 128 bytes to the eeprom
4051 *
4052 * Write the supplied 128 bytes to the chips SEEPROM
4053 *
4054 * @eeprom: the data to write
4055 * @io_port: the base io port
4056 **/
4057 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4058 {
4059 u8 *b_eeprom = (u8 *)eeprom;
4060 u8 addr;
4061
4062 /* Enable SEEPROM */
4063 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4064 io_port + TRM_S1040_GEN_CONTROL);
4065
4066 /* write enable */
4067 trms1040_write_cmd(io_port, 0x04, 0xFF);
4068 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4069 trms1040_wait_30us(io_port);
4070
4071 /* write */
4072 for (addr = 0; addr < 128; addr++, b_eeprom++)
4073 trms1040_set_data(io_port, addr, *b_eeprom);
4074
4075 /* write disable */
4076 trms1040_write_cmd(io_port, 0x04, 0x00);
4077 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4078 trms1040_wait_30us(io_port);
4079
4080 /* Disable SEEPROM */
4081 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4082 io_port + TRM_S1040_GEN_CONTROL);
4083 }
4084
4085
4086 /**
4087 * trms1040_get_data - get a single byte from the eeprom
4088 *
4089 * Called from read all to read a single byte into the SSEEPROM
4090 * Which is done one bit at a time.
4091 *
4092 * @io_port: base I/O address
4093 * @addr: offset into SEEPROM
4094 *
4095 * Returns the byte read.
4096 **/
4097 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4098 {
4099 int i;
4100 u8 read_byte;
4101 u8 result = 0;
4102
4103 /* Send read command & address */
4104 trms1040_write_cmd(io_port, 0x06, addr);
4105
4106 /* read data */
4107 for (i = 0; i < 8; i++) {
4108 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4109 trms1040_wait_30us(io_port);
4110 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4111
4112 /* Get data bit while falling edge */
4113 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4114 result <<= 1;
4115 if (read_byte & NVR_BITIN)
4116 result |= 1;
4117
4118 trms1040_wait_30us(io_port);
4119 }
4120
4121 /* Disable chip select */
4122 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4123 return result;
4124 }
4125
4126
4127 /**
4128 * trms1040_read_all - read all bytes from the eeprom
4129 *
4130 * Read the 128 bytes from the SEEPROM.
4131 *
4132 * @eeprom: where to store the data
4133 * @io_port: the base io port
4134 **/
4135 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4136 {
4137 u8 *b_eeprom = (u8 *)eeprom;
4138 u8 addr;
4139
4140 /* Enable SEEPROM */
4141 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4142 io_port + TRM_S1040_GEN_CONTROL);
4143
4144 /* read details */
4145 for (addr = 0; addr < 128; addr++, b_eeprom++)
4146 *b_eeprom = trms1040_get_data(io_port, addr);
4147
4148 /* Disable SEEPROM */
4149 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4150 io_port + TRM_S1040_GEN_CONTROL);
4151 }
4152
4153
4154
4155 /**
4156 * check_eeprom - get and check contents of the eeprom
4157 *
4158 * Read seeprom 128 bytes into the memory provider in eeprom.
4159 * Checks the checksum and if it's not correct it uses a set of default
4160 * values.
4161 *
4162 * @eeprom: caller allocated strcuture to read the eeprom data into
4163 * @io_port: io port to read from
4164 **/
4165 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4166 {
4167 u16 *w_eeprom = (u16 *)eeprom;
4168 u16 w_addr;
4169 u16 cksum;
4170 u32 d_addr;
4171 u32 *d_eeprom;
4172
4173 trms1040_read_all(eeprom, io_port); /* read eeprom */
4174
4175 cksum = 0;
4176 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4177 w_addr++, w_eeprom++)
4178 cksum += *w_eeprom;
4179 if (cksum != 0x1234) {
4180 /*
4181 * Checksum is wrong.
4182 * Load a set of defaults into the eeprom buffer
4183 */
4184 dprintkl(KERN_WARNING,
4185 "EEProm checksum error: using default values and options.\n");
4186 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4187 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4188 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4189 eeprom->sub_sys_id[1] =
4190 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4191 eeprom->sub_class = 0x00;
4192 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4193 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4194 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4195 eeprom->device_id[1] =
4196 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4197 eeprom->reserved = 0x00;
4198
4199 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4200 d_addr < 16; d_addr++, d_eeprom++)
4201 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4202
4203 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4204 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4205 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4206 *d_eeprom = 0x00;
4207
4208 /* Now load defaults (maybe set by boot/module params) */
4209 set_safe_settings();
4210 fix_settings();
4211 eeprom_override(eeprom);
4212
4213 eeprom->cksum = 0x00;
4214 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4215 w_addr < 63; w_addr++, w_eeprom++)
4216 cksum += *w_eeprom;
4217
4218 *w_eeprom = 0x1234 - cksum;
4219 trms1040_write_all(eeprom, io_port);
4220 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4221 } else {
4222 set_safe_settings();
4223 eeprom_index_to_delay(eeprom);
4224 eeprom_override(eeprom);
4225 }
4226 }
4227
4228
4229 /**
4230 * print_eeprom_settings - output the eeprom settings
4231 * to the kernel log so people can see what they were.
4232 *
4233 * @eeprom: The eeprom data strucutre to show details for.
4234 **/
4235 static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4236 {
4237 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4238 eeprom->scsi_id,
4239 eeprom->target[0].period,
4240 clock_speed[eeprom->target[0].period] / 10,
4241 clock_speed[eeprom->target[0].period] % 10,
4242 eeprom->target[0].cfg0);
4243 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4244 eeprom->channel_cfg, eeprom->max_tag,
4245 1 << eeprom->max_tag, eeprom->delay_time);
4246 }
4247
4248
4249 /* Free SG tables */
4250 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4251 {
4252 int i;
4253 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4254
4255 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4256 kfree(acb->srb_array[i].segment_x);
4257 }
4258
4259
4260 /*
4261 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4262 * should never cross a page boundary */
4263 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4264 {
4265 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4266 *SEGMENTX_LEN;
4267 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4268 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4269 int srb_idx = 0;
4270 unsigned i = 0;
4271 struct SGentry *uninitialized_var(ptr);
4272
4273 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4274 acb->srb_array[i].segment_x = NULL;
4275
4276 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4277 while (pages--) {
4278 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4279 if (!ptr) {
4280 adapter_sg_tables_free(acb);
4281 return 1;
4282 }
4283 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4284 PAGE_SIZE, ptr, srb_idx);
4285 i = 0;
4286 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4287 acb->srb_array[srb_idx++].segment_x =
4288 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4289 }
4290 if (i < srbs_per_page)
4291 acb->srb.segment_x =
4292 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4293 else
4294 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4295 return 0;
4296 }
4297
4298
4299
4300 /**
4301 * adapter_print_config - print adapter connection and termination
4302 * config
4303 *
4304 * The io port in the adapter needs to have been set before calling
4305 * this function.
4306 *
4307 * @acb: The adapter to print the information for.
4308 **/
4309 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4310 {
4311 u8 bval;
4312
4313 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4314 dprintkl(KERN_INFO, "%sConnectors: ",
4315 ((bval & WIDESCSI) ? "(Wide) " : ""));
4316 if (!(bval & CON5068))
4317 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4318 if (!(bval & CON68))
4319 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4320 if (!(bval & CON50))
4321 printk("int50 ");
4322 if ((bval & (CON5068 | CON50 | CON68)) ==
4323 0 /*(CON5068 | CON50 | CON68) */ )
4324 printk(" Oops! (All 3?) ");
4325 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4326 printk(" Termination: ");
4327 if (bval & DIS_TERM)
4328 printk("Disabled\n");
4329 else {
4330 if (bval & AUTOTERM)
4331 printk("Auto ");
4332 if (bval & LOW8TERM)
4333 printk("Low ");
4334 if (bval & UP8TERM)
4335 printk("High ");
4336 printk("\n");
4337 }
4338 }
4339
4340
4341 /**
4342 * adapter_init_params - Initialize the various parameters in the
4343 * adapter structure. Note that the pointer to the scsi_host is set
4344 * early (when this instance is created) and the io_port and irq
4345 * values are set later after they have been reserved. This just gets
4346 * everything set to a good starting position.
4347 *
4348 * The eeprom structure in the adapter needs to have been set before
4349 * calling this function.
4350 *
4351 * @acb: The adapter to initialize.
4352 **/
4353 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4354 {
4355 struct NvRamType *eeprom = &acb->eeprom;
4356 int i;
4357
4358 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4359 /* NOTE: acb->io_port_base is set at port registration time */
4360 /* NOTE: acb->io_port_len is set at port registration time */
4361
4362 INIT_LIST_HEAD(&acb->dcb_list);
4363 acb->dcb_run_robin = NULL;
4364 acb->active_dcb = NULL;
4365
4366 INIT_LIST_HEAD(&acb->srb_free_list);
4367 /* temp SRB for Q tag used or abort command used */
4368 acb->tmp_srb = &acb->srb;
4369 init_timer(&acb->waiting_timer);
4370 init_timer(&acb->selto_timer);
4371
4372 acb->srb_count = DC395x_MAX_SRB_CNT;
4373
4374 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4375 /* NOTE: acb->irq_level is set at IRQ registration time */
4376
4377 acb->tag_max_num = 1 << eeprom->max_tag;
4378 if (acb->tag_max_num > 30)
4379 acb->tag_max_num = 30;
4380
4381 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4382 acb->gmode2 = eeprom->channel_cfg;
4383 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4384
4385 if (eeprom->channel_cfg & NAC_SCANLUN)
4386 acb->lun_chk = 1;
4387 acb->scan_devices = 1;
4388
4389 acb->scsi_host->this_id = eeprom->scsi_id;
4390 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4391
4392 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4393 acb->dcb_map[i] = 0;
4394
4395 acb->msg_len = 0;
4396
4397 /* link static array of srbs into the srb free list */
4398 for (i = 0; i < acb->srb_count - 1; i++)
4399 srb_free_insert(acb, &acb->srb_array[i]);
4400 }
4401
4402
4403 /**
4404 * adapter_init_host - Initialize the scsi host instance based on
4405 * values that we have already stored in the adapter instance. There's
4406 * some mention that a lot of these are deprecated, so we won't use
4407 * them (we'll use the ones in the adapter instance) but we'll fill
4408 * them in in case something else needs them.
4409 *
4410 * The eeprom structure, irq and io ports in the adapter need to have
4411 * been set before calling this function.
4412 *
4413 * @host: The scsi host instance to fill in the values for.
4414 **/
4415 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4416 {
4417 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4418 struct NvRamType *eeprom = &acb->eeprom;
4419
4420 host->max_cmd_len = 24;
4421 host->can_queue = DC395x_MAX_CMD_QUEUE;
4422 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4423 host->this_id = (int)eeprom->scsi_id;
4424 host->io_port = acb->io_port_base;
4425 host->n_io_port = acb->io_port_len;
4426 host->dma_channel = -1;
4427 host->unique_id = acb->io_port_base;
4428 host->irq = acb->irq_level;
4429 host->last_reset = jiffies;
4430
4431 host->max_id = 16;
4432 if (host->max_id - 1 == eeprom->scsi_id)
4433 host->max_id--;
4434
4435 #ifdef CONFIG_SCSI_MULTI_LUN
4436 if (eeprom->channel_cfg & NAC_SCANLUN)
4437 host->max_lun = 8;
4438 else
4439 host->max_lun = 1;
4440 #else
4441 host->max_lun = 1;
4442 #endif
4443
4444 }
4445
4446
4447 /**
4448 * adapter_init_chip - Get the chip into a know state and figure out
4449 * some of the settings that apply to this adapter.
4450 *
4451 * The io port in the adapter needs to have been set before calling
4452 * this function. The config will be configured correctly on return.
4453 *
4454 * @acb: The adapter which we are to init.
4455 **/
4456 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4457 {
4458 struct NvRamType *eeprom = &acb->eeprom;
4459
4460 /* Mask all the interrupt */
4461 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4462 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4463
4464 /* Reset SCSI module */
4465 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4466
4467 /* Reset PCI/DMA module */
4468 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4469 udelay(20);
4470
4471 /* program configuration 0 */
4472 acb->config = HCC_AUTOTERM | HCC_PARITY;
4473 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4474 acb->config |= HCC_WIDE_CARD;
4475
4476 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4477 acb->config |= HCC_SCSI_RESET;
4478
4479 if (acb->config & HCC_SCSI_RESET) {
4480 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4481 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4482
4483 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4484 /*spin_unlock_irq (&io_request_lock); */
4485 udelay(500);
4486
4487 acb->scsi_host->last_reset =
4488 jiffies + HZ / 2 +
4489 HZ * acb->eeprom.delay_time;
4490
4491 /*spin_lock_irq (&io_request_lock); */
4492 }
4493 }
4494
4495
4496 /**
4497 * init_adapter - Grab the resource for the card, setup the adapter
4498 * information, set the card into a known state, create the various
4499 * tables etc etc. This basically gets all adapter information all up
4500 * to date, initialised and gets the chip in sync with it.
4501 *
4502 * @host: This hosts adapter structure
4503 * @io_port: The base I/O port
4504 * @irq: IRQ
4505 *
4506 * Returns 0 if the initialization succeeds, any other value on
4507 * failure.
4508 **/
4509 static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4510 unsigned long io_port, u32 io_port_len, unsigned int irq)
4511 {
4512 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4513 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4514 goto failed;
4515 }
4516 /* store port base to indicate we have registered it */
4517 acb->io_port_base = io_port;
4518 acb->io_port_len = io_port_len;
4519
4520 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4521 /* release the region we just claimed */
4522 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4523 goto failed;
4524 }
4525 /* store irq to indicate we have registered it */
4526 acb->irq_level = irq;
4527
4528 /* get eeprom configuration information and command line settings etc */
4529 check_eeprom(&acb->eeprom, io_port);
4530 print_eeprom_settings(&acb->eeprom);
4531
4532 /* setup adapter control block */
4533 adapter_init_params(acb);
4534
4535 /* display card connectors/termination settings */
4536 adapter_print_config(acb);
4537
4538 if (adapter_sg_tables_alloc(acb)) {
4539 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4540 goto failed;
4541 }
4542 adapter_init_scsi_host(acb->scsi_host);
4543 adapter_init_chip(acb);
4544 set_basic_config(acb);
4545
4546 dprintkdbg(DBG_0,
4547 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4548 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4549 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4550 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4551 return 0;
4552
4553 failed:
4554 if (acb->irq_level)
4555 free_irq(acb->irq_level, acb);
4556 if (acb->io_port_base)
4557 release_region(acb->io_port_base, acb->io_port_len);
4558 adapter_sg_tables_free(acb);
4559
4560 return 1;
4561 }
4562
4563
4564 /**
4565 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4566 * stopping all operations and disabling interrupt generation on the
4567 * card.
4568 *
4569 * @acb: The adapter which we are to shutdown.
4570 **/
4571 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4572 {
4573 /* disable interrupts */
4574 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4575 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4576
4577 /* reset the scsi bus */
4578 if (acb->config & HCC_SCSI_RESET)
4579 reset_scsi_bus(acb);
4580
4581 /* clear any pending interrupt state */
4582 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4583 }
4584
4585
4586
4587 /**
4588 * adapter_uninit - Shut down the chip and release any resources that
4589 * we had allocated. Once this returns the adapter should not be used
4590 * anymore.
4591 *
4592 * @acb: The adapter which we are to un-initialize.
4593 **/
4594 static void adapter_uninit(struct AdapterCtlBlk *acb)
4595 {
4596 unsigned long flags;
4597 DC395x_LOCK_IO(acb->scsi_host, flags);
4598
4599 /* remove timers */
4600 if (timer_pending(&acb->waiting_timer))
4601 del_timer(&acb->waiting_timer);
4602 if (timer_pending(&acb->selto_timer))
4603 del_timer(&acb->selto_timer);
4604
4605 adapter_uninit_chip(acb);
4606 adapter_remove_and_free_all_devices(acb);
4607 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4608
4609 if (acb->irq_level)
4610 free_irq(acb->irq_level, acb);
4611 if (acb->io_port_base)
4612 release_region(acb->io_port_base, acb->io_port_len);
4613
4614 adapter_sg_tables_free(acb);
4615 }
4616
4617
4618 #undef SPRINTF
4619 #define SPRINTF(args...) pos += sprintf(pos, args)
4620
4621 #undef YESNO
4622 #define YESNO(YN) \
4623 if (YN) SPRINTF(" Yes ");\
4624 else SPRINTF(" No ")
4625
4626 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4627 char **start, off_t offset, int length, int inout)
4628 {
4629 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4630 int spd, spd1;
4631 char *pos = buffer;
4632 struct DeviceCtlBlk *dcb;
4633 unsigned long flags;
4634 int dev;
4635
4636 if (inout) /* Has data been written to the file ? */
4637 return -EPERM;
4638
4639 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4640 SPRINTF(" Driver Version " DC395X_VERSION "\n");
4641
4642 DC395x_LOCK_IO(acb->scsi_host, flags);
4643
4644 SPRINTF("SCSI Host Nr %i, ", host->host_no);
4645 SPRINTF("DC395U/UW/F DC315/U %s\n",
4646 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4647 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4648 SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4649 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4650
4651 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4652 SPRINTF("AdapterID %i\n", host->this_id);
4653
4654 SPRINTF("tag_max_num %i", acb->tag_max_num);
4655 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4656 SPRINTF(", FilterCfg 0x%02x",
4657 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4658 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4659 /*SPRINTF("\n"); */
4660
4661 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4662 SPRINTF
4663 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4664 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4665 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4666 acb->dcb_map[6], acb->dcb_map[7]);
4667 SPRINTF
4668 (" %02x %02x %02x %02x %02x %02x %02x %02x\n",
4669 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4670 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4671 acb->dcb_map[14], acb->dcb_map[15]);
4672
4673 SPRINTF
4674 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4675
4676 dev = 0;
4677 list_for_each_entry(dcb, &acb->dcb_list, list) {
4678 int nego_period;
4679 SPRINTF("%02i %02i %02i ", dev, dcb->target_id,
4680 dcb->target_lun);
4681 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4682 YESNO(dcb->sync_offset);
4683 YESNO(dcb->sync_period & WIDE_SYNC);
4684 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4685 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4686 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4687 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4688 if (dcb->sync_offset)
4689 SPRINTF(" %03i ns ", nego_period);
4690 else
4691 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4692
4693 if (dcb->sync_offset & 0x0f) {
4694 spd = 1000 / (nego_period);
4695 spd1 = 1000 % (nego_period);
4696 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4697 SPRINTF(" %2i.%1i M %02i ", spd, spd1,
4698 (dcb->sync_offset & 0x0f));
4699 } else
4700 SPRINTF(" ");
4701
4702 /* Add more info ... */
4703 SPRINTF(" %02i\n", dcb->max_command);
4704 dev++;
4705 }
4706
4707 if (timer_pending(&acb->waiting_timer))
4708 SPRINTF("Waiting queue timer running\n");
4709 else
4710 SPRINTF("\n");
4711
4712 list_for_each_entry(dcb, &acb->dcb_list, list) {
4713 struct ScsiReqBlk *srb;
4714 if (!list_empty(&dcb->srb_waiting_list))
4715 SPRINTF("DCB (%02i-%i): Waiting: %i:",
4716 dcb->target_id, dcb->target_lun,
4717 list_size(&dcb->srb_waiting_list));
4718 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4719 SPRINTF(" %p", srb->cmd);
4720 if (!list_empty(&dcb->srb_going_list))
4721 SPRINTF("\nDCB (%02i-%i): Going : %i:",
4722 dcb->target_id, dcb->target_lun,
4723 list_size(&dcb->srb_going_list));
4724 list_for_each_entry(srb, &dcb->srb_going_list, list)
4725 SPRINTF(" %p", srb->cmd);
4726 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4727 SPRINTF("\n");
4728 }
4729
4730 if (debug_enabled(DBG_1)) {
4731 SPRINTF("DCB list for ACB %p:\n", acb);
4732 list_for_each_entry(dcb, &acb->dcb_list, list) {
4733 SPRINTF("%p -> ", dcb);
4734 }
4735 SPRINTF("END\n");
4736 }
4737
4738 *start = buffer + offset;
4739 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4740
4741 if (pos - buffer < offset)
4742 return 0;
4743 else if (pos - buffer - offset < length)
4744 return pos - buffer - offset;
4745 else
4746 return length;
4747 }
4748
4749
4750 static struct scsi_host_template dc395x_driver_template = {
4751 .module = THIS_MODULE,
4752 .proc_name = DC395X_NAME,
4753 .proc_info = dc395x_proc_info,
4754 .name = DC395X_BANNER " " DC395X_VERSION,
4755 .queuecommand = dc395x_queue_command,
4756 .bios_param = dc395x_bios_param,
4757 .slave_alloc = dc395x_slave_alloc,
4758 .slave_destroy = dc395x_slave_destroy,
4759 .can_queue = DC395x_MAX_CAN_QUEUE,
4760 .this_id = 7,
4761 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4762 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4763 .eh_abort_handler = dc395x_eh_abort,
4764 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4765 .use_clustering = DISABLE_CLUSTERING,
4766 };
4767
4768
4769 /**
4770 * banner_display - Display banner on first instance of driver
4771 * initialized.
4772 **/
4773 static void banner_display(void)
4774 {
4775 static int banner_done = 0;
4776 if (!banner_done)
4777 {
4778 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4779 banner_done = 1;
4780 }
4781 }
4782
4783
4784 /**
4785 * dc395x_init_one - Initialise a single instance of the adapter.
4786 *
4787 * The PCI layer will call this once for each instance of the adapter
4788 * that it finds in the system. The pci_dev strcuture indicates which
4789 * instance we are being called from.
4790 *
4791 * @dev: The PCI device to initialize.
4792 * @id: Looks like a pointer to the entry in our pci device table
4793 * that was actually matched by the PCI subsystem.
4794 *
4795 * Returns 0 on success, or an error code (-ve) on failure.
4796 **/
4797 static int __devinit dc395x_init_one(struct pci_dev *dev,
4798 const struct pci_device_id *id)
4799 {
4800 struct Scsi_Host *scsi_host = NULL;
4801 struct AdapterCtlBlk *acb = NULL;
4802 unsigned long io_port_base;
4803 unsigned int io_port_len;
4804 unsigned int irq;
4805
4806 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4807 banner_display();
4808
4809 if (pci_enable_device(dev))
4810 {
4811 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4812 return -ENODEV;
4813 }
4814 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4815 io_port_len = pci_resource_len(dev, 0);
4816 irq = dev->irq;
4817 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4818
4819 /* allocate scsi host information (includes out adapter) */
4820 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4821 sizeof(struct AdapterCtlBlk));
4822 if (!scsi_host) {
4823 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4824 goto fail;
4825 }
4826 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4827 acb->scsi_host = scsi_host;
4828 acb->dev = dev;
4829
4830 /* initialise the adapter and everything we need */
4831 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4832 dprintkl(KERN_INFO, "adapter init failed\n");
4833 goto fail;
4834 }
4835
4836 pci_set_master(dev);
4837
4838 /* get the scsi mid level to scan for new devices on the bus */
4839 if (scsi_add_host(scsi_host, &dev->dev)) {
4840 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4841 goto fail;
4842 }
4843 pci_set_drvdata(dev, scsi_host);
4844 scsi_scan_host(scsi_host);
4845
4846 return 0;
4847
4848 fail:
4849 if (acb != NULL)
4850 adapter_uninit(acb);
4851 if (scsi_host != NULL)
4852 scsi_host_put(scsi_host);
4853 pci_disable_device(dev);
4854 return -ENODEV;
4855 }
4856
4857
4858 /**
4859 * dc395x_remove_one - Called to remove a single instance of the
4860 * adapter.
4861 *
4862 * @dev: The PCI device to initialize.
4863 **/
4864 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4865 {
4866 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4867 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4868
4869 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4870
4871 scsi_remove_host(scsi_host);
4872 adapter_uninit(acb);
4873 pci_disable_device(dev);
4874 scsi_host_put(scsi_host);
4875 pci_set_drvdata(dev, NULL);
4876 }
4877
4878
4879 static struct pci_device_id dc395x_pci_table[] = {
4880 {
4881 .vendor = PCI_VENDOR_ID_TEKRAM,
4882 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4883 .subvendor = PCI_ANY_ID,
4884 .subdevice = PCI_ANY_ID,
4885 },
4886 {} /* Terminating entry */
4887 };
4888 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4889
4890
4891 static struct pci_driver dc395x_driver = {
4892 .name = DC395X_NAME,
4893 .id_table = dc395x_pci_table,
4894 .probe = dc395x_init_one,
4895 .remove = __devexit_p(dc395x_remove_one),
4896 };
4897
4898
4899 /**
4900 * dc395x_module_init - Module initialization function
4901 *
4902 * Used by both module and built-in driver to initialise this driver.
4903 **/
4904 static int __init dc395x_module_init(void)
4905 {
4906 return pci_register_driver(&dc395x_driver);
4907 }
4908
4909
4910 /**
4911 * dc395x_module_exit - Module cleanup function.
4912 **/
4913 static void __exit dc395x_module_exit(void)
4914 {
4915 pci_unregister_driver(&dc395x_driver);
4916 }
4917
4918
4919 module_init(dc395x_module_init);
4920 module_exit(dc395x_module_exit);
4921
4922 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4923 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4924 MODULE_LICENSE("GPL");