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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / drivers / scsi / dc395x.c
blob075e2397273c6849f5cd1727c9bb749865e05e3b
1 /*
2 * dc395x.c
3 *
4 * Device Driver for Tekram DC395(U/UW/F), DC315(U)
5 * PCI SCSI Bus Master Host Adapter
6 * (SCSI chip set used Tekram ASIC TRM-S1040)
7 *
8 * Authors:
9 * C.L. Huang <ching@tekram.com.tw>
10 * Erich Chen <erich@tekram.com.tw>
11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
12 *
13 * Kurt Garloff <garloff@suse.de>
14 * (C) 1999-2000 Kurt Garloff
15 *
16 * Oliver Neukum <oliver@neukum.name>
17 * Ali Akcaagac <aliakc@web.de>
18 * Jamie Lenehan <lenehan@twibble.org>
19 * (C) 2003
20 *
21 * License: GNU GPL
22 *
23 *************************************************************************
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. The name of the author may not be used to endorse or promote products
34 * derived from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 *
47 ************************************************************************
48 */
49 #include <linux/module.h>
50 #include <linux/moduleparam.h>
51 #include <linux/delay.h>
52 #include <linux/ctype.h>
53 #include <linux/blkdev.h>
54 #include <linux/interrupt.h>
55 #include <linux/init.h>
56 #include <linux/spinlock.h>
57 #include <linux/pci.h>
58 #include <linux/list.h>
59 #include <linux/vmalloc.h>
60 #include <asm/io.h>
61
62 #include <scsi/scsi.h>
63 #include <scsi/scsicam.h> /* needed for scsicam_bios_param */
64 #include <scsi/scsi_cmnd.h>
65 #include <scsi/scsi_device.h>
66 #include <scsi/scsi_host.h>
67
68 #include "dc395x.h"
69
70 #define DC395X_NAME "dc395x"
71 #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
72 #define DC395X_VERSION "v2.05, 2004/03/08"
73
74 /*---------------------------------------------------------------------------
75 Features
76 ---------------------------------------------------------------------------*/
77 /*
78 * Set to disable parts of the driver
79 */
80 /*#define DC395x_NO_DISCONNECT*/
81 /*#define DC395x_NO_TAGQ*/
82 /*#define DC395x_NO_SYNC*/
83 /*#define DC395x_NO_WIDE*/
84
85 /*---------------------------------------------------------------------------
86 Debugging
87 ---------------------------------------------------------------------------*/
88 /*
89 * Types of debugging that can be enabled and disabled
90 */
91 #define DBG_KG 0x0001
92 #define DBG_0 0x0002
93 #define DBG_1 0x0004
94 #define DBG_SG 0x0020
95 #define DBG_FIFO 0x0040
96 #define DBG_PIO 0x0080
97
98
99 /*
100 * Set set of things to output debugging for.
101 * Undefine to remove all debugging
102 */
103 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
104 /*#define DEBUG_MASK DBG_0*/
105
106
107 /*
108 * Output a kernel mesage at the specified level and append the
109 * driver name and a ": " to the start of the message
110 */
111 #define dprintkl(level, format, arg...) \
112 printk(level DC395X_NAME ": " format , ## arg)
113
114
115 #ifdef DEBUG_MASK
116 /*
117 * print a debug message - this is formated with KERN_DEBUG, then the
118 * driver name followed by a ": " and then the message is output.
119 * This also checks that the specified debug level is enabled before
120 * outputing the message
121 */
122 #define dprintkdbg(type, format, arg...) \
123 do { \
124 if ((type) & (DEBUG_MASK)) \
125 dprintkl(KERN_DEBUG , format , ## arg); \
126 } while (0)
127
128 /*
129 * Check if the specified type of debugging is enabled
130 */
131 #define debug_enabled(type) ((DEBUG_MASK) & (type))
132
133 #else
134 /*
135 * No debugging. Do nothing
136 */
137 #define dprintkdbg(type, format, arg...) \
138 do {} while (0)
139 #define debug_enabled(type) (0)
140
141 #endif
142
143
144 #ifndef PCI_VENDOR_ID_TEKRAM
145 #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */
146 #endif
147 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
148 #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */
149 #endif
150
151
152 #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
153 #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
154
155 #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address)))
156 #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address)))
157 #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address)))
158 #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address))
159 #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))
160 #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))
161
162 /* cmd->result */
163 #define RES_TARGET 0x000000FF /* Target State */
164 #define RES_TARGET_LNX STATUS_MASK /* Only official ... */
165 #define RES_ENDMSG 0x0000FF00 /* End Message */
166 #define RES_DID 0x00FF0000 /* DID_ codes */
167 #define RES_DRV 0xFF000000 /* DRIVER_ codes */
168
169 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
170 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
171
172 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
173 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
174 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
175 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
176 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
177
178 #define TAG_NONE 255
179
180 /*
181 * srb->segement_x is the hw sg list. It is always allocated as a
182 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
183 * cross a page boundy.
184 */
185 #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
186
187
188 struct SGentry {
189 u32 address; /* bus! address */
190 u32 length;
191 };
192
193 /* The SEEPROM structure for TRM_S1040 */
194 struct NVRamTarget {
195 u8 cfg0; /* Target configuration byte 0 */
196 u8 period; /* Target period */
197 u8 cfg2; /* Target configuration byte 2 */
198 u8 cfg3; /* Target configuration byte 3 */
199 };
200
201 struct NvRamType {
202 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */
203 u8 sub_sys_id[2]; /* 2,3 Sub System ID */
204 u8 sub_class; /* 4 Sub Class */
205 u8 vendor_id[2]; /* 5,6 Vendor ID */
206 u8 device_id[2]; /* 7,8 Device ID */
207 u8 reserved; /* 9 Reserved */
208 struct NVRamTarget target[DC395x_MAX_SCSI_ID];
209 /** 10,11,12,13
210 ** 14,15,16,17
211 ** ....
212 ** ....
213 ** 70,71,72,73
214 */
215 u8 scsi_id; /* 74 Host Adapter SCSI ID */
216 u8 channel_cfg; /* 75 Channel configuration */
217 u8 delay_time; /* 76 Power on delay time */
218 u8 max_tag; /* 77 Maximum tags */
219 u8 reserved0; /* 78 */
220 u8 boot_target; /* 79 */
221 u8 boot_lun; /* 80 */
222 u8 reserved1; /* 81 */
223 u16 reserved2[22]; /* 82,..125 */
224 u16 cksum; /* 126,127 */
225 };
226
227 struct ScsiReqBlk {
228 struct list_head list; /* next/prev ptrs for srb lists */
229 struct DeviceCtlBlk *dcb;
230 struct scsi_cmnd *cmd;
231
232 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */
233 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */
234
235 u8 sg_count; /* No of HW sg entries for this request */
236 u8 sg_index; /* Index of HW sg entry for this request */
237 size_t total_xfer_length; /* Total number of bytes remaining to be transfered */
238 size_t request_length; /* Total number of bytes in this request */
239 /*
240 * The sense buffer handling function, request_sense, uses
241 * the first hw sg entry (segment_x[0]) and the transfer
242 * length (total_xfer_length). While doing this it stores the
243 * original values into the last sg hw list
244 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
245 * total_xfer_length in xferred. These values are restored in
246 * pci_unmap_srb_sense. This is the only place xferred is used.
247 */
248 size_t xferred; /* Saved copy of total_xfer_length */
249
250 u16 state;
251
252 u8 msgin_buf[6];
253 u8 msgout_buf[6];
254
255 u8 adapter_status;
256 u8 target_status;
257 u8 msg_count;
258 u8 end_message;
259
260 u8 tag_number;
261 u8 status;
262 u8 retry_count;
263 u8 flag;
264
265 u8 scsi_phase;
266 };
267
268 struct DeviceCtlBlk {
269 struct list_head list; /* next/prev ptrs for the dcb list */
270 struct AdapterCtlBlk *acb;
271 struct list_head srb_going_list; /* head of going srb list */
272 struct list_head srb_waiting_list; /* head of waiting srb list */
273
274 struct ScsiReqBlk *active_srb;
275 u32 tag_mask;
276
277 u16 max_command;
278
279 u8 target_id; /* SCSI Target ID (SCSI Only) */
280 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */
281 u8 identify_msg;
282 u8 dev_mode;
283
284 u8 inquiry7; /* To store Inquiry flags */
285 u8 sync_mode; /* 0:async mode */
286 u8 min_nego_period; /* for nego. */
287 u8 sync_period; /* for reg. */
288
289 u8 sync_offset; /* for reg. and nego.(low nibble) */
290 u8 flag;
291 u8 dev_type;
292 u8 init_tcq_flag;
293 };
294
295 struct AdapterCtlBlk {
296 struct Scsi_Host *scsi_host;
297
298 unsigned long io_port_base;
299 unsigned long io_port_len;
300
301 struct list_head dcb_list; /* head of going dcb list */
302 struct DeviceCtlBlk *dcb_run_robin;
303 struct DeviceCtlBlk *active_dcb;
304
305 struct list_head srb_free_list; /* head of free srb list */
306 struct ScsiReqBlk *tmp_srb;
307 struct timer_list waiting_timer;
308 struct timer_list selto_timer;
309
310 u16 srb_count;
311
312 u8 sel_timeout;
313
314 unsigned int irq_level;
315 u8 tag_max_num;
316 u8 acb_flag;
317 u8 gmode2;
318
319 u8 config;
320 u8 lun_chk;
321 u8 scan_devices;
322 u8 hostid_bit;
323
324 u8 dcb_map[DC395x_MAX_SCSI_ID];
325 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
326
327 struct pci_dev *dev;
328
329 u8 msg_len;
330
331 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
332 struct ScsiReqBlk srb;
333
334 struct NvRamType eeprom; /* eeprom settings for this adapter */
335 };
336
337
338 /*---------------------------------------------------------------------------
339 Forward declarations
340 ---------------------------------------------------------------------------*/
341 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
342 u16 *pscsi_status);
343 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
344 u16 *pscsi_status);
345 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
346 u16 *pscsi_status);
347 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
348 u16 *pscsi_status);
349 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
350 u16 *pscsi_status);
351 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
352 u16 *pscsi_status);
353 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
354 u16 *pscsi_status);
355 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
356 u16 *pscsi_status);
357 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
358 u16 *pscsi_status);
359 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
360 u16 *pscsi_status);
361 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
362 u16 *pscsi_status);
363 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
364 u16 *pscsi_status);
365 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
366 u16 *pscsi_status);
367 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
368 u16 *pscsi_status);
369 static void set_basic_config(struct AdapterCtlBlk *acb);
370 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
371 struct ScsiReqBlk *srb);
372 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
373 static void data_io_transfer(struct AdapterCtlBlk *acb,
374 struct ScsiReqBlk *srb, u16 io_dir);
375 static void disconnect(struct AdapterCtlBlk *acb);
376 static void reselect(struct AdapterCtlBlk *acb);
377 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
378 struct ScsiReqBlk *srb);
379 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
380 struct ScsiReqBlk *srb);
381 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
382 struct ScsiReqBlk *srb);
383 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
384 struct scsi_cmnd *cmd, u8 force);
385 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
386 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
387 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
388 struct ScsiReqBlk *srb);
389 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
390 struct ScsiReqBlk *srb);
391 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
392 struct ScsiReqBlk *srb);
393 static void set_xfer_rate(struct AdapterCtlBlk *acb,
394 struct DeviceCtlBlk *dcb);
395 static void waiting_timeout(unsigned long ptr);
396
397
398 /*---------------------------------------------------------------------------
399 Static Data
400 ---------------------------------------------------------------------------*/
401 static u16 current_sync_offset = 0;
402
403 static void *dc395x_scsi_phase0[] = {
404 data_out_phase0,/* phase:0 */
405 data_in_phase0, /* phase:1 */
406 command_phase0, /* phase:2 */
407 status_phase0, /* phase:3 */
408 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
409 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
410 msgout_phase0, /* phase:6 */
411 msgin_phase0, /* phase:7 */
412 };
413
414 static void *dc395x_scsi_phase1[] = {
415 data_out_phase1,/* phase:0 */
416 data_in_phase1, /* phase:1 */
417 command_phase1, /* phase:2 */
418 status_phase1, /* phase:3 */
419 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
420 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
421 msgout_phase1, /* phase:6 */
422 msgin_phase1, /* phase:7 */
423 };
424
425 /*
426 *Fast20: 000 50ns, 20.0 MHz
427 * 001 75ns, 13.3 MHz
428 * 010 100ns, 10.0 MHz
429 * 011 125ns, 8.0 MHz
430 * 100 150ns, 6.6 MHz
431 * 101 175ns, 5.7 MHz
432 * 110 200ns, 5.0 MHz
433 * 111 250ns, 4.0 MHz
434 *
435 *Fast40(LVDS): 000 25ns, 40.0 MHz
436 * 001 50ns, 20.0 MHz
437 * 010 75ns, 13.3 MHz
438 * 011 100ns, 10.0 MHz
439 * 100 125ns, 8.0 MHz
440 * 101 150ns, 6.6 MHz
441 * 110 175ns, 5.7 MHz
442 * 111 200ns, 5.0 MHz
443 */
444 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
445
446 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
447 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
448 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
449
450
451 /*---------------------------------------------------------------------------
452 Configuration
453 ---------------------------------------------------------------------------*/
454 /*
455 * Module/boot parameters currently effect *all* instances of the
456 * card in the system.
457 */
458
459 /*
460 * Command line parameters are stored in a structure below.
461 * These are the index's into the structure for the various
462 * command line options.
463 */
464 #define CFG_ADAPTER_ID 0
465 #define CFG_MAX_SPEED 1
466 #define CFG_DEV_MODE 2
467 #define CFG_ADAPTER_MODE 3
468 #define CFG_TAGS 4
469 #define CFG_RESET_DELAY 5
470
471 #define CFG_NUM 6 /* number of configuration items */
472
473
474 /*
475 * Value used to indicate that a command line override
476 * hasn't been used to modify the value.
477 */
478 #define CFG_PARAM_UNSET -1
479
480
481 /*
482 * Hold command line parameters.
483 */
484 struct ParameterData {
485 int value; /* value of this setting */
486 int min; /* minimum value */
487 int max; /* maximum value */
488 int def; /* default value */
489 int safe; /* safe value */
490 };
491 static struct ParameterData __devinitdata cfg_data[] = {
492 { /* adapter id */
493 CFG_PARAM_UNSET,
494 0,
495 15,
496 7,
497 7
498 },
499 { /* max speed */
500 CFG_PARAM_UNSET,
501 0,
502 7,
503 1, /* 13.3Mhz */
504 4, /* 6.7Hmz */
505 },
506 { /* dev mode */
507 CFG_PARAM_UNSET,
508 0,
509 0x3f,
510 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
511 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
512 NTC_DO_SEND_START,
513 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
514 },
515 { /* adapter mode */
516 CFG_PARAM_UNSET,
517 0,
518 0x2f,
519 #ifdef CONFIG_SCSI_MULTI_LUN
520 NAC_SCANLUN |
521 #endif
522 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
523 /*| NAC_ACTIVE_NEG*/,
524 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
525 },
526 { /* tags */
527 CFG_PARAM_UNSET,
528 0,
529 5,
530 3, /* 16 tags (??) */
531 2,
532 },
533 { /* reset delay */
534 CFG_PARAM_UNSET,
535 0,
536 180,
537 1, /* 1 second */
538 10, /* 10 seconds */
539 }
540 };
541
542
543 /*
544 * Safe settings. If set to zero the BIOS/default values with
545 * command line overrides will be used. If set to 1 then safe and
546 * slow settings will be used.
547 */
548 static int use_safe_settings = 0;
549 module_param_named(safe, use_safe_settings, bool, 0);
550 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
551
552
553 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
554 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
555
556 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
557 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
558
559 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
560 MODULE_PARM_DESC(dev_mode, "Device mode.");
561
562 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
563 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
564
565 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
566 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
567
568 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
569 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
570
571
572 /**
573 * set_safe_settings - if the use_safe_settings option is set then
574 * set all values to the safe and slow values.
575 **/
576 static void __devinit set_safe_settings(void)
577 {
578 if (use_safe_settings)
579 {
580 int i;
581
582 dprintkl(KERN_INFO, "Using safe settings.\n");
583 for (i = 0; i < CFG_NUM; i++)
584 {
585 cfg_data[i].value = cfg_data[i].safe;
586 }
587 }
588 }
589
590
591 /**
592 * fix_settings - reset any boot parameters which are out of range
593 * back to the default values.
594 **/
595 static void __devinit fix_settings(void)
596 {
597 int i;
598
599 dprintkdbg(DBG_1,
600 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
601 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
602 cfg_data[CFG_ADAPTER_ID].value,
603 cfg_data[CFG_MAX_SPEED].value,
604 cfg_data[CFG_DEV_MODE].value,
605 cfg_data[CFG_ADAPTER_MODE].value,
606 cfg_data[CFG_TAGS].value,
607 cfg_data[CFG_RESET_DELAY].value);
608 for (i = 0; i < CFG_NUM; i++)
609 {
610 if (cfg_data[i].value < cfg_data[i].min
611 || cfg_data[i].value > cfg_data[i].max)
612 cfg_data[i].value = cfg_data[i].def;
613 }
614 }
615
616
617
618 /*
619 * Mapping from the eeprom delay index value (index into this array)
620 * to the number of actual seconds that the delay should be for.
621 */
622 static char __devinitdata eeprom_index_to_delay_map[] =
623 { 1, 3, 5, 10, 16, 30, 60, 120 };
624
625
626 /**
627 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
628 * into a number of seconds.
629 *
630 * @eeprom: The eeprom structure in which we find the delay index to map.
631 **/
632 static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
633 {
634 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
635 }
636
637
638 /**
639 * delay_to_eeprom_index - Take a delay in seconds and return the
640 * closest eeprom index which will delay for at least that amount of
641 * seconds.
642 *
643 * @delay: The delay, in seconds, to find the eeprom index for.
644 **/
645 static int __devinit delay_to_eeprom_index(int delay)
646 {
647 u8 idx = 0;
648 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
649 idx++;
650 return idx;
651 }
652
653
654 /**
655 * eeprom_override - Override the eeprom settings, in the provided
656 * eeprom structure, with values that have been set on the command
657 * line.
658 *
659 * @eeprom: The eeprom data to override with command line options.
660 **/
661 static void __devinit eeprom_override(struct NvRamType *eeprom)
662 {
663 u8 id;
664
665 /* Adapter Settings */
666 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
667 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
668
669 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
670 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
671
672 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
673 eeprom->delay_time = delay_to_eeprom_index(
674 cfg_data[CFG_RESET_DELAY].value);
675
676 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
677 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
678
679 /* Device Settings */
680 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
681 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
682 eeprom->target[id].cfg0 =
683 (u8)cfg_data[CFG_DEV_MODE].value;
684
685 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
686 eeprom->target[id].period =
687 (u8)cfg_data[CFG_MAX_SPEED].value;
688
689 }
690 }
691
692
693 /*---------------------------------------------------------------------------
694 ---------------------------------------------------------------------------*/
695
696 static unsigned int list_size(struct list_head *head)
697 {
698 unsigned int count = 0;
699 struct list_head *pos;
700 list_for_each(pos, head)
701 count++;
702 return count;
703 }
704
705
706 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
707 struct DeviceCtlBlk *pos)
708 {
709 int use_next = 0;
710 struct DeviceCtlBlk* next = NULL;
711 struct DeviceCtlBlk* i;
712
713 if (list_empty(head))
714 return NULL;
715
716 /* find supplied dcb and then select the next one */
717 list_for_each_entry(i, head, list)
718 if (use_next) {
719 next = i;
720 break;
721 } else if (i == pos) {
722 use_next = 1;
723 }
724 /* if no next one take the head one (ie, wraparound) */
725 if (!next)
726 list_for_each_entry(i, head, list) {
727 next = i;
728 break;
729 }
730
731 return next;
732 }
733
734
735 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
736 {
737 if (srb->tag_number < 255) {
738 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
739 srb->tag_number = 255;
740 }
741 }
742
743
744 /* Find cmd in SRB list */
745 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
746 struct list_head *head)
747 {
748 struct ScsiReqBlk *i;
749 list_for_each_entry(i, head, list)
750 if (i->cmd == cmd)
751 return i;
752 return NULL;
753 }
754
755
756 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
757 {
758 struct list_head *head = &acb->srb_free_list;
759 struct ScsiReqBlk *srb = NULL;
760
761 if (!list_empty(head)) {
762 srb = list_entry(head->next, struct ScsiReqBlk, list);
763 list_del(head->next);
764 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
765 }
766 return srb;
767 }
768
769
770 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
771 {
772 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
773 list_add_tail(&srb->list, &acb->srb_free_list);
774 }
775
776
777 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
778 struct ScsiReqBlk *srb)
779 {
780 dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
781 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
782 list_add(&srb->list, &dcb->srb_waiting_list);
783 }
784
785
786 static void srb_waiting_append(struct DeviceCtlBlk *dcb,
787 struct ScsiReqBlk *srb)
788 {
789 dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
790 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
791 list_add_tail(&srb->list, &dcb->srb_waiting_list);
792 }
793
794
795 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
796 {
797 dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
798 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
799 list_add_tail(&srb->list, &dcb->srb_going_list);
800 }
801
802
803 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
804 {
805 struct ScsiReqBlk *i;
806 struct ScsiReqBlk *tmp;
807 dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
808 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
809
810 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
811 if (i == srb) {
812 list_del(&srb->list);
813 break;
814 }
815 }
816
817
818 static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
819 struct ScsiReqBlk *srb)
820 {
821 struct ScsiReqBlk *i;
822 struct ScsiReqBlk *tmp;
823 dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
824 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
825
826 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
827 if (i == srb) {
828 list_del(&srb->list);
829 break;
830 }
831 }
832
833
834 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
835 struct ScsiReqBlk *srb)
836 {
837 dprintkdbg(DBG_0,
838 "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
839 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
840 list_move(&srb->list, &dcb->srb_waiting_list);
841 }
842
843
844 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
845 struct ScsiReqBlk *srb)
846 {
847 dprintkdbg(DBG_0,
848 "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
849 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
850 list_move(&srb->list, &dcb->srb_going_list);
851 }
852
853
854 /* Sets the timer to wake us up */
855 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
856 {
857 if (timer_pending(&acb->waiting_timer))
858 return;
859 init_timer(&acb->waiting_timer);
860 acb->waiting_timer.function = waiting_timeout;
861 acb->waiting_timer.data = (unsigned long) acb;
862 if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
863 acb->waiting_timer.expires =
864 acb->scsi_host->last_reset - HZ / 2 + 1;
865 else
866 acb->waiting_timer.expires = jiffies + to + 1;
867 add_timer(&acb->waiting_timer);
868 }
869
870
871 /* Send the next command from the waiting list to the bus */
872 static void waiting_process_next(struct AdapterCtlBlk *acb)
873 {
874 struct DeviceCtlBlk *start = NULL;
875 struct DeviceCtlBlk *pos;
876 struct DeviceCtlBlk *dcb;
877 struct ScsiReqBlk *srb;
878 struct list_head *dcb_list_head = &acb->dcb_list;
879
880 if (acb->active_dcb
881 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
882 return;
883
884 if (timer_pending(&acb->waiting_timer))
885 del_timer(&acb->waiting_timer);
886
887 if (list_empty(dcb_list_head))
888 return;
889
890 /*
891 * Find the starting dcb. Need to find it again in the list
892 * since the list may have changed since we set the ptr to it
893 */
894 list_for_each_entry(dcb, dcb_list_head, list)
895 if (dcb == acb->dcb_run_robin) {
896 start = dcb;
897 break;
898 }
899 if (!start) {
900 /* This can happen! */
901 start = list_entry(dcb_list_head->next, typeof(*start), list);
902 acb->dcb_run_robin = start;
903 }
904
905
906 /*
907 * Loop over the dcb, but we start somewhere (potentially) in
908 * the middle of the loop so we need to manully do this.
909 */
910 pos = start;
911 do {
912 struct list_head *waiting_list_head = &pos->srb_waiting_list;
913
914 /* Make sure, the next another device gets scheduled ... */
915 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
916 acb->dcb_run_robin);
917
918 if (list_empty(waiting_list_head) ||
919 pos->max_command <= list_size(&pos->srb_going_list)) {
920 /* move to next dcb */
921 pos = dcb_get_next(dcb_list_head, pos);
922 } else {
923 srb = list_entry(waiting_list_head->next,
924 struct ScsiReqBlk, list);
925
926 /* Try to send to the bus */
927 if (!start_scsi(acb, pos, srb))
928 srb_waiting_to_going_move(pos, srb);
929 else
930 waiting_set_timer(acb, HZ/50);
931 break;
932 }
933 } while (pos != start);
934 }
935
936
937 /* Wake up waiting queue */
938 static void waiting_timeout(unsigned long ptr)
939 {
940 unsigned long flags;
941 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
942 dprintkdbg(DBG_1,
943 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
944 DC395x_LOCK_IO(acb->scsi_host, flags);
945 waiting_process_next(acb);
946 DC395x_UNLOCK_IO(acb->scsi_host, flags);
947 }
948
949
950 /* Get the DCB for a given ID/LUN combination */
951 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
952 {
953 return acb->children[id][lun];
954 }
955
956
957 /* Send SCSI Request Block (srb) to adapter (acb) */
958 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
959 {
960 struct DeviceCtlBlk *dcb = srb->dcb;
961
962 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
963 acb->active_dcb ||
964 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
965 srb_waiting_append(dcb, srb);
966 waiting_process_next(acb);
967 return;
968 }
969
970 if (!start_scsi(acb, dcb, srb))
971 srb_going_append(dcb, srb);
972 else {
973 srb_waiting_insert(dcb, srb);
974 waiting_set_timer(acb, HZ / 50);
975 }
976 }
977
978 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
979 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
980 struct ScsiReqBlk *srb)
981 {
982 int nseg;
983 enum dma_data_direction dir = cmd->sc_data_direction;
984 dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
985 cmd->serial_number, dcb->target_id, dcb->target_lun);
986
987 srb->dcb = dcb;
988 srb->cmd = cmd;
989 srb->sg_count = 0;
990 srb->total_xfer_length = 0;
991 srb->sg_bus_addr = 0;
992 srb->sg_index = 0;
993 srb->adapter_status = 0;
994 srb->target_status = 0;
995 srb->msg_count = 0;
996 srb->status = 0;
997 srb->flag = 0;
998 srb->state = 0;
999 srb->retry_count = 0;
1000 srb->tag_number = TAG_NONE;
1001 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1002 srb->end_message = 0;
1003
1004 nseg = scsi_dma_map(cmd);
1005 BUG_ON(nseg < 0);
1006
1007 if (dir == PCI_DMA_NONE || !nseg) {
1008 dprintkdbg(DBG_0,
1009 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1010 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
1011 srb->segment_x[0].address);
1012 } else {
1013 int i;
1014 u32 reqlen = scsi_bufflen(cmd);
1015 struct scatterlist *sg;
1016 struct SGentry *sgp = srb->segment_x;
1017
1018 srb->sg_count = nseg;
1019
1020 dprintkdbg(DBG_0,
1021 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1022 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
1023 srb->sg_count);
1024
1025 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
1026 u32 busaddr = (u32)sg_dma_address(sg);
1027 u32 seglen = (u32)sg->length;
1028 sgp[i].address = busaddr;
1029 sgp[i].length = seglen;
1030 srb->total_xfer_length += seglen;
1031 }
1032 sgp += srb->sg_count - 1;
1033
1034 /*
1035 * adjust last page if too big as it is allocated
1036 * on even page boundaries
1037 */
1038 if (srb->total_xfer_length > reqlen) {
1039 sgp->length -= (srb->total_xfer_length - reqlen);
1040 srb->total_xfer_length = reqlen;
1041 }
1042
1043 /* Fixup for WIDE padding - make sure length is even */
1044 if (dcb->sync_period & WIDE_SYNC &&
1045 srb->total_xfer_length % 2) {
1046 srb->total_xfer_length++;
1047 sgp->length++;
1048 }
1049
1050 srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1051 srb->segment_x,
1052 SEGMENTX_LEN,
1053 PCI_DMA_TODEVICE);
1054
1055 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1056 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1057 }
1058
1059 srb->request_length = srb->total_xfer_length;
1060 }
1061
1062
1063 /**
1064 * dc395x_queue_command - queue scsi command passed from the mid
1065 * layer, invoke 'done' on completion
1066 *
1067 * @cmd: pointer to scsi command object
1068 * @done: function pointer to be invoked on completion
1069 *
1070 * Returns 1 if the adapter (host) is busy, else returns 0. One
1071 * reason for an adapter to be busy is that the number
1072 * of outstanding queued commands is already equal to
1073 * struct Scsi_Host::can_queue .
1074 *
1075 * Required: if struct Scsi_Host::can_queue is ever non-zero
1076 * then this function is required.
1077 *
1078 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1079 * and is expected to be held on return.
1080 *
1081 **/
1082 static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1083 {
1084 struct DeviceCtlBlk *dcb;
1085 struct ScsiReqBlk *srb;
1086 struct AdapterCtlBlk *acb =
1087 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1088 dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n",
1089 cmd->serial_number, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
1090
1091 /* Assume BAD_TARGET; will be cleared later */
1092 cmd->result = DID_BAD_TARGET << 16;
1093
1094 /* ignore invalid targets */
1095 if (cmd->device->id >= acb->scsi_host->max_id ||
1096 cmd->device->lun >= acb->scsi_host->max_lun ||
1097 cmd->device->lun >31) {
1098 goto complete;
1099 }
1100
1101 /* does the specified lun on the specified device exist */
1102 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1103 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1104 cmd->device->id, cmd->device->lun);
1105 goto complete;
1106 }
1107
1108 /* do we have a DCB for the device */
1109 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1110 if (!dcb) {
1111 /* should never happen */
1112 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1113 cmd->device->id, cmd->device->lun);
1114 goto complete;
1115 }
1116
1117 /* set callback and clear result in the command */
1118 cmd->scsi_done = done;
1119 cmd->result = 0;
1120
1121 srb = srb_get_free(acb);
1122 if (!srb)
1123 {
1124 /*
1125 * Return 1 since we are unable to queue this command at this
1126 * point in time.
1127 */
1128 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1129 return 1;
1130 }
1131
1132 build_srb(cmd, dcb, srb);
1133
1134 if (!list_empty(&dcb->srb_waiting_list)) {
1135 /* append to waiting queue */
1136 srb_waiting_append(dcb, srb);
1137 waiting_process_next(acb);
1138 } else {
1139 /* process immediately */
1140 send_srb(acb, srb);
1141 }
1142 dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->serial_number);
1143 return 0;
1144
1145 complete:
1146 /*
1147 * Complete the command immediatey, and then return 0 to
1148 * indicate that we have handled the command. This is usually
1149 * done when the commad is for things like non existent
1150 * devices.
1151 */
1152 done(cmd);
1153 return 0;
1154 }
1155
1156
1157 /*
1158 * Return the disk geometry for the given SCSI device.
1159 */
1160 static int dc395x_bios_param(struct scsi_device *sdev,
1161 struct block_device *bdev, sector_t capacity, int *info)
1162 {
1163 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1164 int heads, sectors, cylinders;
1165 struct AdapterCtlBlk *acb;
1166 int size = capacity;
1167
1168 dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1169 acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1170 heads = 64;
1171 sectors = 32;
1172 cylinders = size / (heads * sectors);
1173
1174 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1175 heads = 255;
1176 sectors = 63;
1177 cylinders = size / (heads * sectors);
1178 }
1179 geom[0] = heads;
1180 geom[1] = sectors;
1181 geom[2] = cylinders;
1182 return 0;
1183 #else
1184 return scsicam_bios_param(bdev, capacity, info);
1185 #endif
1186 }
1187
1188
1189 static void dump_register_info(struct AdapterCtlBlk *acb,
1190 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1191 {
1192 u16 pstat;
1193 struct pci_dev *dev = acb->dev;
1194 pci_read_config_word(dev, PCI_STATUS, &pstat);
1195 if (!dcb)
1196 dcb = acb->active_dcb;
1197 if (!srb && dcb)
1198 srb = dcb->active_srb;
1199 if (srb) {
1200 if (!srb->cmd)
1201 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1202 srb, srb->cmd);
1203 else
1204 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) "
1205 "cmnd=0x%02x <%02i-%i>\n",
1206 srb, srb->cmd, srb->cmd->serial_number,
1207 srb->cmd->cmnd[0], srb->cmd->device->id,
1208 srb->cmd->device->lun);
1209 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1210 srb->segment_x, srb->sg_count, srb->sg_index,
1211 srb->total_xfer_length);
1212 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1213 srb->state, srb->status, srb->scsi_phase,
1214 (acb->active_dcb) ? "" : "not");
1215 }
1216 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1217 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1218 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1219 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1220 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1221 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1222 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1223 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1224 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1225 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1226 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1227 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1228 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1229 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1230 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1231 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1232 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1233 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1234 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1235 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1236 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1237 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1238 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1239 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1240 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1241 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1242 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1243 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1244 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1245 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1246 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1247 "pci{status=0x%04x}\n",
1248 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1249 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1250 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1251 pstat);
1252 }
1253
1254
1255 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1256 {
1257 #if debug_enabled(DBG_FIFO)
1258 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1259 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1260 if (!(fifocnt & 0x40))
1261 dprintkdbg(DBG_FIFO,
1262 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1263 fifocnt & 0x3f, lines, txt);
1264 #endif
1265 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1266 }
1267
1268
1269 static void reset_dev_param(struct AdapterCtlBlk *acb)
1270 {
1271 struct DeviceCtlBlk *dcb;
1272 struct NvRamType *eeprom = &acb->eeprom;
1273 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1274
1275 list_for_each_entry(dcb, &acb->dcb_list, list) {
1276 u8 period_index;
1277
1278 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1279 dcb->sync_period = 0;
1280 dcb->sync_offset = 0;
1281
1282 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1283 period_index = eeprom->target[dcb->target_id].period & 0x07;
1284 dcb->min_nego_period = clock_period[period_index];
1285 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1286 || !(acb->config & HCC_WIDE_CARD))
1287 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1288 }
1289 }
1290
1291
1292 /*
1293 * perform a hard reset on the SCSI bus
1294 * @cmd - some command for this host (for fetching hooks)
1295 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1296 */
1297 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1298 {
1299 struct AdapterCtlBlk *acb =
1300 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1301 dprintkl(KERN_INFO,
1302 "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n",
1303 cmd->serial_number, cmd->device->id, cmd->device->lun, cmd);
1304
1305 if (timer_pending(&acb->waiting_timer))
1306 del_timer(&acb->waiting_timer);
1307
1308 /*
1309 * disable interrupt
1310 */
1311 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1312 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1313 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1314 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1315
1316 reset_scsi_bus(acb);
1317 udelay(500);
1318
1319 /* We may be in serious trouble. Wait some seconds */
1320 acb->scsi_host->last_reset =
1321 jiffies + 3 * HZ / 2 +
1322 HZ * acb->eeprom.delay_time;
1323
1324 /*
1325 * re-enable interrupt
1326 */
1327 /* Clear SCSI FIFO */
1328 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1329 clear_fifo(acb, "eh_bus_reset");
1330 /* Delete pending IRQ */
1331 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1332 set_basic_config(acb);
1333
1334 reset_dev_param(acb);
1335 doing_srb_done(acb, DID_RESET, cmd, 0);
1336 acb->active_dcb = NULL;
1337 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1338 waiting_process_next(acb);
1339
1340 return SUCCESS;
1341 }
1342
1343 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1344 {
1345 int rc;
1346
1347 spin_lock_irq(cmd->device->host->host_lock);
1348 rc = __dc395x_eh_bus_reset(cmd);
1349 spin_unlock_irq(cmd->device->host->host_lock);
1350
1351 return rc;
1352 }
1353
1354 /*
1355 * abort an errant SCSI command
1356 * @cmd - command to be aborted
1357 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1358 */
1359 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1360 {
1361 /*
1362 * Look into our command queues: If it has not been sent already,
1363 * we remove it and return success. Otherwise fail.
1364 */
1365 struct AdapterCtlBlk *acb =
1366 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1367 struct DeviceCtlBlk *dcb;
1368 struct ScsiReqBlk *srb;
1369 dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n",
1370 cmd->serial_number, cmd->device->id, cmd->device->lun, cmd);
1371
1372 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1373 if (!dcb) {
1374 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1375 return FAILED;
1376 }
1377
1378 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1379 if (srb) {
1380 srb_waiting_remove(dcb, srb);
1381 pci_unmap_srb_sense(acb, srb);
1382 pci_unmap_srb(acb, srb);
1383 free_tag(dcb, srb);
1384 srb_free_insert(acb, srb);
1385 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1386 cmd->result = DID_ABORT << 16;
1387 return SUCCESS;
1388 }
1389 srb = find_cmd(cmd, &dcb->srb_going_list);
1390 if (srb) {
1391 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1392 /* XXX: Should abort the command here */
1393 } else {
1394 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1395 }
1396 return FAILED;
1397 }
1398
1399
1400 /* SDTR */
1401 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1402 struct ScsiReqBlk *srb)
1403 {
1404 u8 *ptr = srb->msgout_buf + srb->msg_count;
1405 if (srb->msg_count > 1) {
1406 dprintkl(KERN_INFO,
1407 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1408 srb->msg_count, srb->msgout_buf[0],
1409 srb->msgout_buf[1]);
1410 return;
1411 }
1412 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1413 dcb->sync_offset = 0;
1414 dcb->min_nego_period = 200 >> 2;
1415 } else if (dcb->sync_offset == 0)
1416 dcb->sync_offset = SYNC_NEGO_OFFSET;
1417
1418 *ptr++ = MSG_EXTENDED; /* (01h) */
1419 *ptr++ = 3; /* length */
1420 *ptr++ = EXTENDED_SDTR; /* (01h) */
1421 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1422 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1423 srb->msg_count += 5;
1424 srb->state |= SRB_DO_SYNC_NEGO;
1425 }
1426
1427
1428 /* WDTR */
1429 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1430 struct ScsiReqBlk *srb)
1431 {
1432 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1433 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1434 u8 *ptr = srb->msgout_buf + srb->msg_count;
1435 if (srb->msg_count > 1) {
1436 dprintkl(KERN_INFO,
1437 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1438 srb->msg_count, srb->msgout_buf[0],
1439 srb->msgout_buf[1]);
1440 return;
1441 }
1442 *ptr++ = MSG_EXTENDED; /* (01h) */
1443 *ptr++ = 2; /* length */
1444 *ptr++ = EXTENDED_WDTR; /* (03h) */
1445 *ptr++ = wide;
1446 srb->msg_count += 4;
1447 srb->state |= SRB_DO_WIDE_NEGO;
1448 }
1449
1450
1451 #if 0
1452 /* Timer to work around chip flaw: When selecting and the bus is
1453 * busy, we sometimes miss a Selection timeout IRQ */
1454 void selection_timeout_missed(unsigned long ptr);
1455 /* Sets the timer to wake us up */
1456 static void selto_timer(struct AdapterCtlBlk *acb)
1457 {
1458 if (timer_pending(&acb->selto_timer))
1459 return;
1460 acb->selto_timer.function = selection_timeout_missed;
1461 acb->selto_timer.data = (unsigned long) acb;
1462 if (time_before
1463 (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
1464 acb->selto_timer.expires =
1465 acb->scsi_host->last_reset + HZ / 2 + 1;
1466 else
1467 acb->selto_timer.expires = jiffies + HZ + 1;
1468 add_timer(&acb->selto_timer);
1469 }
1470
1471
1472 void selection_timeout_missed(unsigned long ptr)
1473 {
1474 unsigned long flags;
1475 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1476 struct ScsiReqBlk *srb;
1477 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1478 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1479 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1480 return;
1481 }
1482 DC395x_LOCK_IO(acb->scsi_host, flags);
1483 srb = acb->active_dcb->active_srb;
1484 disconnect(acb);
1485 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1486 }
1487 #endif
1488
1489
1490 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1491 struct ScsiReqBlk* srb)
1492 {
1493 u16 s_stat2, return_code;
1494 u8 s_stat, scsicommand, i, identify_message;
1495 u8 *ptr;
1496 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n",
1497 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
1498
1499 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1500
1501 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1502 s_stat2 = 0;
1503 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1504 #if 1
1505 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1506 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n",
1507 srb->cmd->serial_number, s_stat, s_stat2);
1508 /*
1509 * Try anyway?
1510 *
1511 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1512 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed!
1513 * (This is likely to be a bug in the hardware. Obviously, most people
1514 * only have one initiator per SCSI bus.)
1515 * Instead let this fail and have the timer make sure the command is
1516 * tried again after a short time
1517 */
1518 /*selto_timer (acb); */
1519 return 1;
1520 }
1521 #endif
1522 if (acb->active_dcb) {
1523 dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a"
1524 "command while another command (pid#%li) is active.",
1525 srb->cmd->serial_number,
1526 acb->active_dcb->active_srb ?
1527 acb->active_dcb->active_srb->cmd->serial_number : 0);
1528 return 1;
1529 }
1530 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1531 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n",
1532 srb->cmd->serial_number);
1533 return 1;
1534 }
1535 /* Allow starting of SCSI commands half a second before we allow the mid-level
1536 * to queue them again after a reset */
1537 if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
1538 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1539 return 1;
1540 }
1541
1542 /* Flush FIFO */
1543 clear_fifo(acb, "start_scsi");
1544 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1545 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1546 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1547 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1548 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1549
1550 identify_message = dcb->identify_msg;
1551 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1552 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1553 if (srb->flag & AUTO_REQSENSE)
1554 identify_message &= 0xBF;
1555
1556 if (((srb->cmd->cmnd[0] == INQUIRY)
1557 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1558 || (srb->flag & AUTO_REQSENSE))
1559 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1560 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1561 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1562 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1563 && (dcb->target_lun == 0)) {
1564 srb->msgout_buf[0] = identify_message;
1565 srb->msg_count = 1;
1566 scsicommand = SCMD_SEL_ATNSTOP;
1567 srb->state = SRB_MSGOUT;
1568 #ifndef SYNC_FIRST
1569 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1570 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1571 build_wdtr(acb, dcb, srb);
1572 goto no_cmd;
1573 }
1574 #endif
1575 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1576 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1577 build_sdtr(acb, dcb, srb);
1578 goto no_cmd;
1579 }
1580 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1581 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1582 build_wdtr(acb, dcb, srb);
1583 goto no_cmd;
1584 }
1585 srb->msg_count = 0;
1586 }
1587 /* Send identify message */
1588 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1589
1590 scsicommand = SCMD_SEL_ATN;
1591 srb->state = SRB_START_;
1592 #ifndef DC395x_NO_TAGQ
1593 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1594 && (identify_message & 0xC0)) {
1595 /* Send Tag message */
1596 u32 tag_mask = 1;
1597 u8 tag_number = 0;
1598 while (tag_mask & dcb->tag_mask
1599 && tag_number <= dcb->max_command) {
1600 tag_mask = tag_mask << 1;
1601 tag_number++;
1602 }
1603 if (tag_number >= dcb->max_command) {
1604 dprintkl(KERN_WARNING, "start_scsi: (pid#%li) "
1605 "Out of tags target=<%02i-%i>)\n",
1606 srb->cmd->serial_number, srb->cmd->device->id,
1607 srb->cmd->device->lun);
1608 srb->state = SRB_READY;
1609 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1610 DO_HWRESELECT);
1611 return 1;
1612 }
1613 /* Send Tag id */
1614 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1615 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1616 dcb->tag_mask |= tag_mask;
1617 srb->tag_number = tag_number;
1618 scsicommand = SCMD_SEL_ATN3;
1619 srb->state = SRB_START_;
1620 }
1621 #endif
1622 /*polling:*/
1623 /* Send CDB ..command block ......... */
1624 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n",
1625 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun,
1626 srb->cmd->cmnd[0], srb->tag_number);
1627 if (srb->flag & AUTO_REQSENSE) {
1628 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1629 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1630 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1631 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1632 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1633 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1634 } else {
1635 ptr = (u8 *)srb->cmd->cmnd;
1636 for (i = 0; i < srb->cmd->cmd_len; i++)
1637 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1638 }
1639 no_cmd:
1640 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1641 DO_HWRESELECT | DO_DATALATCH);
1642 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1643 /*
1644 * If start_scsi return 1:
1645 * we caught an interrupt (must be reset or reselection ... )
1646 * : Let's process it first!
1647 */
1648 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
1649 srb->cmd->serial_number, dcb->target_id, dcb->target_lun);
1650 srb->state = SRB_READY;
1651 free_tag(dcb, srb);
1652 srb->msg_count = 0;
1653 return_code = 1;
1654 /* This IRQ should NOT get lost, as we did not acknowledge it */
1655 } else {
1656 /*
1657 * If start_scsi returns 0:
1658 * we know that the SCSI processor is free
1659 */
1660 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1661 dcb->active_srb = srb;
1662 acb->active_dcb = dcb;
1663 return_code = 0;
1664 /* it's important for atn stop */
1665 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1666 DO_DATALATCH | DO_HWRESELECT);
1667 /* SCSI command */
1668 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1669 }
1670 return return_code;
1671 }
1672
1673
1674 #define DC395x_ENABLE_MSGOUT \
1675 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1676 srb->state |= SRB_MSGOUT
1677
1678
1679 /* abort command */
1680 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1681 struct ScsiReqBlk *srb)
1682 {
1683 srb->msgout_buf[0] = ABORT;
1684 srb->msg_count = 1;
1685 DC395x_ENABLE_MSGOUT;
1686 srb->state &= ~SRB_MSGIN;
1687 srb->state |= SRB_MSGOUT;
1688 }
1689
1690
1691 /**
1692 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1693 * have been triggered for this card.
1694 *
1695 * @acb: a pointer to the adpter control block
1696 * @scsi_status: the status return when we checked the card
1697 **/
1698 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1699 u16 scsi_status)
1700 {
1701 struct DeviceCtlBlk *dcb;
1702 struct ScsiReqBlk *srb;
1703 u16 phase;
1704 u8 scsi_intstatus;
1705 unsigned long flags;
1706 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1707 u16 *);
1708
1709 DC395x_LOCK_IO(acb->scsi_host, flags);
1710
1711 /* This acknowledges the IRQ */
1712 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1713 if ((scsi_status & 0x2007) == 0x2002)
1714 dprintkl(KERN_DEBUG,
1715 "COP after COP completed? %04x\n", scsi_status);
1716 if (debug_enabled(DBG_KG)) {
1717 if (scsi_intstatus & INT_SELTIMEOUT)
1718 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1719 }
1720 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1721
1722 if (timer_pending(&acb->selto_timer))
1723 del_timer(&acb->selto_timer);
1724
1725 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1726 disconnect(acb); /* bus free interrupt */
1727 goto out_unlock;
1728 }
1729 if (scsi_intstatus & INT_RESELECTED) {
1730 reselect(acb);
1731 goto out_unlock;
1732 }
1733 if (scsi_intstatus & INT_SELECT) {
1734 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1735 goto out_unlock;
1736 }
1737 if (scsi_intstatus & INT_SCSIRESET) {
1738 scsi_reset_detect(acb);
1739 goto out_unlock;
1740 }
1741 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1742 dcb = acb->active_dcb;
1743 if (!dcb) {
1744 dprintkl(KERN_DEBUG,
1745 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1746 scsi_status, scsi_intstatus);
1747 goto out_unlock;
1748 }
1749 srb = dcb->active_srb;
1750 if (dcb->flag & ABORT_DEV_) {
1751 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1752 enable_msgout_abort(acb, srb);
1753 }
1754
1755 /* software sequential machine */
1756 phase = (u16)srb->scsi_phase;
1757
1758 /*
1759 * 62037 or 62137
1760 * call dc395x_scsi_phase0[]... "phase entry"
1761 * handle every phase before start transfer
1762 */
1763 /* data_out_phase0, phase:0 */
1764 /* data_in_phase0, phase:1 */
1765 /* command_phase0, phase:2 */
1766 /* status_phase0, phase:3 */
1767 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1768 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1769 /* msgout_phase0, phase:6 */
1770 /* msgin_phase0, phase:7 */
1771 dc395x_statev = dc395x_scsi_phase0[phase];
1772 dc395x_statev(acb, srb, &scsi_status);
1773
1774 /*
1775 * if there were any exception occured scsi_status
1776 * will be modify to bus free phase new scsi_status
1777 * transfer out from ... previous dc395x_statev
1778 */
1779 srb->scsi_phase = scsi_status & PHASEMASK;
1780 phase = (u16)scsi_status & PHASEMASK;
1781
1782 /*
1783 * call dc395x_scsi_phase1[]... "phase entry" handle
1784 * every phase to do transfer
1785 */
1786 /* data_out_phase1, phase:0 */
1787 /* data_in_phase1, phase:1 */
1788 /* command_phase1, phase:2 */
1789 /* status_phase1, phase:3 */
1790 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1791 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1792 /* msgout_phase1, phase:6 */
1793 /* msgin_phase1, phase:7 */
1794 dc395x_statev = dc395x_scsi_phase1[phase];
1795 dc395x_statev(acb, srb, &scsi_status);
1796 }
1797 out_unlock:
1798 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1799 }
1800
1801
1802 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1803 {
1804 struct AdapterCtlBlk *acb = dev_id;
1805 u16 scsi_status;
1806 u8 dma_status;
1807 irqreturn_t handled = IRQ_NONE;
1808
1809 /*
1810 * Check for pending interrupt
1811 */
1812 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1813 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1814 if (scsi_status & SCSIINTERRUPT) {
1815 /* interrupt pending - let's process it! */
1816 dc395x_handle_interrupt(acb, scsi_status);
1817 handled = IRQ_HANDLED;
1818 }
1819 else if (dma_status & 0x20) {
1820 /* Error from the DMA engine */
1821 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1822 #if 0
1823 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1824 if (acb->active_dcb) {
1825 acb->active_dcb-> flag |= ABORT_DEV_;
1826 if (acb->active_dcb->active_srb)
1827 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1828 }
1829 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1830 #else
1831 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1832 acb = NULL;
1833 #endif
1834 handled = IRQ_HANDLED;
1835 }
1836
1837 return handled;
1838 }
1839
1840
1841 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1842 u16 *pscsi_status)
1843 {
1844 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->serial_number);
1845 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1846 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1847
1848 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1849 srb->state &= ~SRB_MSGOUT;
1850 }
1851
1852
1853 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1854 u16 *pscsi_status)
1855 {
1856 u16 i;
1857 u8 *ptr;
1858 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->serial_number);
1859
1860 clear_fifo(acb, "msgout_phase1");
1861 if (!(srb->state & SRB_MSGOUT)) {
1862 srb->state |= SRB_MSGOUT;
1863 dprintkl(KERN_DEBUG,
1864 "msgout_phase1: (pid#%li) Phase unexpected\n",
1865 srb->cmd->serial_number); /* So what ? */
1866 }
1867 if (!srb->msg_count) {
1868 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
1869 srb->cmd->serial_number);
1870 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1871 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1872 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1873 return;
1874 }
1875 ptr = (u8 *)srb->msgout_buf;
1876 for (i = 0; i < srb->msg_count; i++)
1877 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1878 srb->msg_count = 0;
1879 if (srb->msgout_buf[0] == MSG_ABORT)
1880 srb->state = SRB_ABORT_SENT;
1881
1882 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1883 }
1884
1885
1886 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1887 u16 *pscsi_status)
1888 {
1889 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->serial_number);
1890 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1891 }
1892
1893
1894 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1895 u16 *pscsi_status)
1896 {
1897 struct DeviceCtlBlk *dcb;
1898 u8 *ptr;
1899 u16 i;
1900 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->serial_number);
1901
1902 clear_fifo(acb, "command_phase1");
1903 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1904 if (!(srb->flag & AUTO_REQSENSE)) {
1905 ptr = (u8 *)srb->cmd->cmnd;
1906 for (i = 0; i < srb->cmd->cmd_len; i++) {
1907 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1908 ptr++;
1909 }
1910 } else {
1911 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1912 dcb = acb->active_dcb;
1913 /* target id */
1914 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1915 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1916 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1917 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1918 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1919 }
1920 srb->state |= SRB_COMMAND;
1921 /* it's important for atn stop */
1922 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1923 /* SCSI command */
1924 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1925 }
1926
1927
1928 /*
1929 * Verify that the remaining space in the hw sg lists is the same as
1930 * the count of remaining bytes in srb->total_xfer_length
1931 */
1932 static void sg_verify_length(struct ScsiReqBlk *srb)
1933 {
1934 if (debug_enabled(DBG_SG)) {
1935 unsigned len = 0;
1936 unsigned idx = srb->sg_index;
1937 struct SGentry *psge = srb->segment_x + idx;
1938 for (; idx < srb->sg_count; psge++, idx++)
1939 len += psge->length;
1940 if (len != srb->total_xfer_length)
1941 dprintkdbg(DBG_SG,
1942 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1943 srb->total_xfer_length, len);
1944 }
1945 }
1946
1947
1948 /*
1949 * Compute the next Scatter Gather list index and adjust its length
1950 * and address if necessary
1951 */
1952 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1953 {
1954 u8 idx;
1955 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
1956 struct SGentry *psge = srb->segment_x + srb->sg_index;
1957
1958 dprintkdbg(DBG_0,
1959 "sg_update_list: Transfered %i of %i bytes, %i remain\n",
1960 xferred, srb->total_xfer_length, left);
1961 if (xferred == 0) {
1962 /* nothing to update since we did not transfer any data */
1963 return;
1964 }
1965
1966 sg_verify_length(srb);
1967 srb->total_xfer_length = left; /* update remaining count */
1968 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1969 if (xferred >= psge->length) {
1970 /* Complete SG entries done */
1971 xferred -= psge->length;
1972 } else {
1973 /* Partial SG entry done */
1974 psge->length -= xferred;
1975 psge->address += xferred;
1976 srb->sg_index = idx;
1977 pci_dma_sync_single_for_device(srb->dcb->
1978 acb->dev,
1979 srb->sg_bus_addr,
1980 SEGMENTX_LEN,
1981 PCI_DMA_TODEVICE);
1982 break;
1983 }
1984 psge++;
1985 }
1986 sg_verify_length(srb);
1987 }
1988
1989
1990 /*
1991 * We have transfered a single byte (PIO mode?) and need to update
1992 * the count of bytes remaining (total_xfer_length) and update the sg
1993 * entry to either point to next byte in the current sg entry, or of
1994 * already at the end to point to the start of the next sg entry
1995 */
1996 static void sg_subtract_one(struct ScsiReqBlk *srb)
1997 {
1998 sg_update_list(srb, srb->total_xfer_length - 1);
1999 }
2000
2001
2002 /*
2003 * cleanup_after_transfer
2004 *
2005 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2006 * KG: Currently called from StatusPhase1 ()
2007 * Should probably also be called from other places
2008 * Best might be to call it in DataXXPhase0, if new phase will differ
2009 */
2010 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2011 struct ScsiReqBlk *srb)
2012 {
2013 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2014 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2015 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2016 clear_fifo(acb, "cleanup/in");
2017 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2018 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2019 } else { /* write */
2020 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2021 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2022 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2023 clear_fifo(acb, "cleanup/out");
2024 }
2025 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2026 }
2027
2028
2029 /*
2030 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
2031 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2032 */
2033 #define DC395x_LASTPIO 4
2034
2035
2036 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2037 u16 *pscsi_status)
2038 {
2039 struct DeviceCtlBlk *dcb = srb->dcb;
2040 u16 scsi_status = *pscsi_status;
2041 u32 d_left_counter = 0;
2042 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
2043 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2044
2045 /*
2046 * KG: We need to drain the buffers before we draw any conclusions!
2047 * This means telling the DMA to push the rest into SCSI, telling
2048 * SCSI to push the rest to the bus.
2049 * However, the device might have been the one to stop us (phase
2050 * change), and the data in transit just needs to be accounted so
2051 * it can be retransmitted.)
2052 */
2053 /*
2054 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2055 * If we need more data, the DMA SG list will be freshly set up, anyway
2056 */
2057 dprintkdbg(DBG_PIO, "data_out_phase0: "
2058 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2059 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2060 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2061 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2062 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2063 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2064 srb->total_xfer_length);
2065 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2066
2067 if (!(srb->state & SRB_XFERPAD)) {
2068 if (scsi_status & PARITYERROR)
2069 srb->status |= PARITY_ERROR;
2070
2071 /*
2072 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2073 * is the no of bytes it got from the DMA engine not the no it
2074 * transferred successfully to the device. (And the difference could
2075 * be as much as the FIFO size, I guess ...)
2076 */
2077 if (!(scsi_status & SCSIXFERDONE)) {
2078 /*
2079 * when data transfer from DMA FIFO to SCSI FIFO
2080 * if there was some data left in SCSI FIFO
2081 */
2082 d_left_counter =
2083 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2084 0x1F);
2085 if (dcb->sync_period & WIDE_SYNC)
2086 d_left_counter <<= 1;
2087
2088 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2089 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2090 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2091 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2092 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2093 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2094 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2095 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2096 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2097 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2098 }
2099 /*
2100 * calculate all the residue data that not yet tranfered
2101 * SCSI transfer counter + left in SCSI FIFO data
2102 *
2103 * .....TRM_S1040_SCSI_COUNTER (24bits)
2104 * The counter always decrement by one for every SCSI byte transfer.
2105 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2106 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2107 */
2108 if (srb->total_xfer_length > DC395x_LASTPIO)
2109 d_left_counter +=
2110 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2111
2112 /* Is this a good idea? */
2113 /*clear_fifo(acb, "DOP1"); */
2114 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2115 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2116 && scsi_bufflen(srb->cmd) % 2) {
2117 d_left_counter = 0;
2118 dprintkl(KERN_INFO,
2119 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2120 scsi_status);
2121 }
2122 /*
2123 * KG: Oops again. Same thinko as above: The SCSI might have been
2124 * faster than the DMA engine, so that it ran out of data.
2125 * In that case, we have to do just nothing!
2126 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2127 */
2128 /*
2129 * KG: This is nonsense: We have been WRITING data to the bus
2130 * If the SCSI engine has no bytes left, how should the DMA engine?
2131 */
2132 if (d_left_counter == 0) {
2133 srb->total_xfer_length = 0;
2134 } else {
2135 /*
2136 * if transfer not yet complete
2137 * there were some data residue in SCSI FIFO or
2138 * SCSI transfer counter not empty
2139 */
2140 long oldxferred =
2141 srb->total_xfer_length - d_left_counter;
2142 const int diff =
2143 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2144 sg_update_list(srb, d_left_counter);
2145 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2146 if ((srb->segment_x[srb->sg_index].length ==
2147 diff && scsi_sg_count(srb->cmd))
2148 || ((oldxferred & ~PAGE_MASK) ==
2149 (PAGE_SIZE - diff))
2150 ) {
2151 dprintkl(KERN_INFO, "data_out_phase0: "
2152 "Work around chip bug (%i)?\n", diff);
2153 d_left_counter =
2154 srb->total_xfer_length - diff;
2155 sg_update_list(srb, d_left_counter);
2156 /*srb->total_xfer_length -= diff; */
2157 /*srb->virt_addr += diff; */
2158 /*if (srb->cmd->use_sg) */
2159 /* srb->sg_index++; */
2160 }
2161 }
2162 }
2163 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2164 cleanup_after_transfer(acb, srb);
2165 }
2166 }
2167
2168
2169 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2170 u16 *pscsi_status)
2171 {
2172 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
2173 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2174 clear_fifo(acb, "data_out_phase1");
2175 /* do prepare before transfer when data out phase */
2176 data_io_transfer(acb, srb, XFERDATAOUT);
2177 }
2178
2179 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2180 u16 *pscsi_status)
2181 {
2182 u16 scsi_status = *pscsi_status;
2183
2184 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
2185 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2186
2187 /*
2188 * KG: DataIn is much more tricky than DataOut. When the device is finished
2189 * and switches to another phase, the SCSI engine should be finished too.
2190 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2191 * engine and transferred to memory.
2192 * We should wait for the FIFOs to be emptied by that (is there any way to
2193 * enforce this?) and then stop the DMA engine, because it might think, that
2194 * there are more bytes to follow. Yes, the device might disconnect prior to
2195 * having all bytes transferred!
2196 * Also we should make sure that all data from the DMA engine buffer's really
2197 * made its way to the system memory! Some documentation on this would not
2198 * seem to be a bad idea, actually.
2199 */
2200 if (!(srb->state & SRB_XFERPAD)) {
2201 u32 d_left_counter;
2202 unsigned int sc, fc;
2203
2204 if (scsi_status & PARITYERROR) {
2205 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
2206 "Parity Error\n", srb->cmd->serial_number);
2207 srb->status |= PARITY_ERROR;
2208 }
2209 /*
2210 * KG: We should wait for the DMA FIFO to be empty ...
2211 * but: it would be better to wait first for the SCSI FIFO and then the
2212 * the DMA FIFO to become empty? How do we know, that the device not already
2213 * sent data to the FIFO in a MsgIn phase, eg.?
2214 */
2215 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2216 #if 0
2217 int ctr = 6000000;
2218 dprintkl(KERN_DEBUG,
2219 "DIP0: Wait for DMA FIFO to flush ...\n");
2220 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2221 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2222 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2223 while (!
2224 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2225 0x80) && --ctr);
2226 if (ctr < 6000000 - 1)
2227 dprintkl(KERN_DEBUG
2228 "DIP0: Had to wait for DMA ...\n");
2229 if (!ctr)
2230 dprintkl(KERN_ERR,
2231 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2232 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2233 #endif
2234 dprintkdbg(DBG_KG, "data_in_phase0: "
2235 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2236 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2237 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2238 }
2239 /* Now: Check remainig data: The SCSI counters should tell us ... */
2240 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2241 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2242 d_left_counter = sc + ((fc & 0x1f)
2243 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2244 0));
2245 dprintkdbg(DBG_KG, "data_in_phase0: "
2246 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2247 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2248 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2249 fc,
2250 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2251 sc,
2252 fc,
2253 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2254 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2255 srb->total_xfer_length, d_left_counter);
2256 #if DC395x_LASTPIO
2257 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
2258 if (d_left_counter
2259 && srb->total_xfer_length <= DC395x_LASTPIO) {
2260 size_t left_io = srb->total_xfer_length;
2261
2262 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2263 /*sg_update_list (srb, d_left_counter); */
2264 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2265 "for remaining %i bytes:",
2266 fc & 0x1f,
2267 (srb->dcb->sync_period & WIDE_SYNC) ?
2268 "words" : "bytes",
2269 srb->total_xfer_length);
2270 if (srb->dcb->sync_period & WIDE_SYNC)
2271 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2272 CFG2_WIDEFIFO);
2273 while (left_io) {
2274 unsigned char *virt, *base = NULL;
2275 unsigned long flags = 0;
2276 size_t len = left_io;
2277 size_t offset = srb->request_length - left_io;
2278
2279 local_irq_save(flags);
2280 /* Assumption: it's inside one page as it's at most 4 bytes and
2281 I just assume it's on a 4-byte boundary */
2282 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2283 srb->sg_count, &offset, &len);
2284 virt = base + offset;
2285
2286 left_io -= len;
2287
2288 while (len) {
2289 u8 byte;
2290 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2291 *virt++ = byte;
2292
2293 if (debug_enabled(DBG_PIO))
2294 printk(" %02x", byte);
2295
2296 d_left_counter--;
2297 sg_subtract_one(srb);
2298
2299 len--;
2300
2301 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2302
2303 if (fc == 0x40) {
2304 left_io = 0;
2305 break;
2306 }
2307 }
2308
2309 WARN_ON((fc != 0x40) == !d_left_counter);
2310
2311 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2312 /* Read the last byte ... */
2313 if (srb->total_xfer_length > 0) {
2314 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2315
2316 *virt++ = byte;
2317 srb->total_xfer_length--;
2318 if (debug_enabled(DBG_PIO))
2319 printk(" %02x", byte);
2320 }
2321
2322 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2323 }
2324
2325 scsi_kunmap_atomic_sg(base);
2326 local_irq_restore(flags);
2327 }
2328 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2329 /*srb->total_xfer_length = 0; */
2330 if (debug_enabled(DBG_PIO))
2331 printk("\n");
2332 }
2333 #endif /* DC395x_LASTPIO */
2334
2335 #if 0
2336 /*
2337 * KG: This was in DATAOUT. Does it also belong here?
2338 * Nobody seems to know what counter and fifo_cnt count exactly ...
2339 */
2340 if (!(scsi_status & SCSIXFERDONE)) {
2341 /*
2342 * when data transfer from DMA FIFO to SCSI FIFO
2343 * if there was some data left in SCSI FIFO
2344 */
2345 d_left_counter =
2346 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2347 0x1F);
2348 if (srb->dcb->sync_period & WIDE_SYNC)
2349 d_left_counter <<= 1;
2350 /*
2351 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2352 * so need to *= 2
2353 * KG: Seems to be correct ...
2354 */
2355 }
2356 #endif
2357 /* KG: This should not be needed any more! */
2358 if (d_left_counter == 0
2359 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2360 #if 0
2361 int ctr = 6000000;
2362 u8 TempDMAstatus;
2363 do {
2364 TempDMAstatus =
2365 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2366 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2367 if (!ctr)
2368 dprintkl(KERN_ERR,
2369 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2370 srb->total_xfer_length = 0;
2371 #endif
2372 srb->total_xfer_length = d_left_counter;
2373 } else { /* phase changed */
2374 /*
2375 * parsing the case:
2376 * when a transfer not yet complete
2377 * but be disconnected by target
2378 * if transfer not yet complete
2379 * there were some data residue in SCSI FIFO or
2380 * SCSI transfer counter not empty
2381 */
2382 sg_update_list(srb, d_left_counter);
2383 }
2384 }
2385 /* KG: The target may decide to disconnect: Empty FIFO before! */
2386 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2387 cleanup_after_transfer(acb, srb);
2388 }
2389 }
2390
2391
2392 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2393 u16 *pscsi_status)
2394 {
2395 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
2396 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2397 data_io_transfer(acb, srb, XFERDATAIN);
2398 }
2399
2400
2401 static void data_io_transfer(struct AdapterCtlBlk *acb,
2402 struct ScsiReqBlk *srb, u16 io_dir)
2403 {
2404 struct DeviceCtlBlk *dcb = srb->dcb;
2405 u8 bval;
2406 dprintkdbg(DBG_0,
2407 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2408 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun,
2409 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2410 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2411 if (srb == acb->tmp_srb)
2412 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2413 if (srb->sg_index >= srb->sg_count) {
2414 /* can't happen? out of bounds error */
2415 return;
2416 }
2417
2418 if (srb->total_xfer_length > DC395x_LASTPIO) {
2419 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2420 /*
2421 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2422 * Maybe, even ABORTXFER would be appropriate
2423 */
2424 if (dma_status & XFERPENDING) {
2425 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2426 "Expect trouble!\n");
2427 dump_register_info(acb, dcb, srb);
2428 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2429 }
2430 /* clear_fifo(acb, "IO"); */
2431 /*
2432 * load what physical address of Scatter/Gather list table
2433 * want to be transfer
2434 */
2435 srb->state |= SRB_DATA_XFER;
2436 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2437 if (scsi_sg_count(srb->cmd)) { /* with S/G */
2438 io_dir |= DMACMD_SG;
2439 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2440 srb->sg_bus_addr +
2441 sizeof(struct SGentry) *
2442 srb->sg_index);
2443 /* load how many bytes in the sg list table */
2444 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2445 ((u32)(srb->sg_count -
2446 srb->sg_index) << 3));
2447 } else { /* without S/G */
2448 io_dir &= ~DMACMD_SG;
2449 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2450 srb->segment_x[0].address);
2451 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2452 srb->segment_x[0].length);
2453 }
2454 /* load total transfer length (24bits) max value 16Mbyte */
2455 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2456 srb->total_xfer_length);
2457 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2458 if (io_dir & DMACMD_DIR) { /* read */
2459 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2460 SCMD_DMA_IN);
2461 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2462 } else {
2463 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2464 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2465 SCMD_DMA_OUT);
2466 }
2467
2468 }
2469 #if DC395x_LASTPIO
2470 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2471 /*
2472 * load what physical address of Scatter/Gather list table
2473 * want to be transfer
2474 */
2475 srb->state |= SRB_DATA_XFER;
2476 /* load total transfer length (24bits) max value 16Mbyte */
2477 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2478 srb->total_xfer_length);
2479 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2480 if (io_dir & DMACMD_DIR) { /* read */
2481 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2482 SCMD_FIFO_IN);
2483 } else { /* write */
2484 int ln = srb->total_xfer_length;
2485 size_t left_io = srb->total_xfer_length;
2486
2487 if (srb->dcb->sync_period & WIDE_SYNC)
2488 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2489 CFG2_WIDEFIFO);
2490
2491 while (left_io) {
2492 unsigned char *virt, *base = NULL;
2493 unsigned long flags = 0;
2494 size_t len = left_io;
2495 size_t offset = srb->request_length - left_io;
2496
2497 local_irq_save(flags);
2498 /* Again, max 4 bytes */
2499 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2500 srb->sg_count, &offset, &len);
2501 virt = base + offset;
2502
2503 left_io -= len;
2504
2505 while (len--) {
2506 if (debug_enabled(DBG_PIO))
2507 printk(" %02x", *virt);
2508
2509 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2510
2511 sg_subtract_one(srb);
2512 }
2513
2514 scsi_kunmap_atomic_sg(base);
2515 local_irq_restore(flags);
2516 }
2517 if (srb->dcb->sync_period & WIDE_SYNC) {
2518 if (ln % 2) {
2519 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2520 if (debug_enabled(DBG_PIO))
2521 printk(" |00");
2522 }
2523 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2524 }
2525 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2526 if (debug_enabled(DBG_PIO))
2527 printk("\n");
2528 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2529 SCMD_FIFO_OUT);
2530 }
2531 }
2532 #endif /* DC395x_LASTPIO */
2533 else { /* xfer pad */
2534 u8 data = 0, data2 = 0;
2535 if (srb->sg_count) {
2536 srb->adapter_status = H_OVER_UNDER_RUN;
2537 srb->status |= OVER_RUN;
2538 }
2539 /*
2540 * KG: despite the fact that we are using 16 bits I/O ops
2541 * the SCSI FIFO is only 8 bits according to the docs
2542 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2543 */
2544 if (dcb->sync_period & WIDE_SYNC) {
2545 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2546 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2547 CFG2_WIDEFIFO);
2548 if (io_dir & DMACMD_DIR) {
2549 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2550 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2551 } else {
2552 /* Danger, Robinson: If you find KGs
2553 * scattered over the wide disk, the driver
2554 * or chip is to blame :-( */
2555 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2556 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2557 }
2558 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2559 } else {
2560 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2561 /* Danger, Robinson: If you find a collection of Ks on your disk
2562 * something broke :-( */
2563 if (io_dir & DMACMD_DIR)
2564 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2565 else
2566 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2567 }
2568 srb->state |= SRB_XFERPAD;
2569 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2570 /* SCSI command */
2571 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2572 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2573 }
2574 }
2575
2576
2577 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2578 u16 *pscsi_status)
2579 {
2580 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
2581 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2582 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2583 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2584 srb->state = SRB_COMPLETED;
2585 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2586 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2587 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2588 }
2589
2590
2591 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2592 u16 *pscsi_status)
2593 {
2594 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
2595 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2596 srb->state = SRB_STATUS;
2597 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2598 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2599 }
2600
2601
2602 /* Check if the message is complete */
2603 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2604 {
2605 if (*msgbuf == EXTENDED_MESSAGE) {
2606 if (len < 2)
2607 return 0;
2608 if (len < msgbuf[1] + 2)
2609 return 0;
2610 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2611 if (len < 2)
2612 return 0;
2613 return 1;
2614 }
2615
2616 /* reject_msg */
2617 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2618 struct ScsiReqBlk *srb)
2619 {
2620 srb->msgout_buf[0] = MESSAGE_REJECT;
2621 srb->msg_count = 1;
2622 DC395x_ENABLE_MSGOUT;
2623 srb->state &= ~SRB_MSGIN;
2624 srb->state |= SRB_MSGOUT;
2625 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2626 srb->msgin_buf[0],
2627 srb->dcb->target_id, srb->dcb->target_lun);
2628 }
2629
2630
2631 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2632 struct DeviceCtlBlk *dcb, u8 tag)
2633 {
2634 struct ScsiReqBlk *srb = NULL;
2635 struct ScsiReqBlk *i;
2636 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
2637 srb->cmd->serial_number, tag, srb);
2638
2639 if (!(dcb->tag_mask & (1 << tag)))
2640 dprintkl(KERN_DEBUG,
2641 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2642 dcb->tag_mask, tag);
2643
2644 if (list_empty(&dcb->srb_going_list))
2645 goto mingx0;
2646 list_for_each_entry(i, &dcb->srb_going_list, list) {
2647 if (i->tag_number == tag) {
2648 srb = i;
2649 break;
2650 }
2651 }
2652 if (!srb)
2653 goto mingx0;
2654
2655 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
2656 srb->cmd->serial_number, srb->dcb->target_id, srb->dcb->target_lun);
2657 if (dcb->flag & ABORT_DEV_) {
2658 /*srb->state = SRB_ABORT_SENT; */
2659 enable_msgout_abort(acb, srb);
2660 }
2661
2662 if (!(srb->state & SRB_DISCONNECT))
2663 goto mingx0;
2664
2665 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2666 srb->state |= dcb->active_srb->state;
2667 srb->state |= SRB_DATA_XFER;
2668 dcb->active_srb = srb;
2669 /* How can we make the DORS happy? */
2670 return srb;
2671
2672 mingx0:
2673 srb = acb->tmp_srb;
2674 srb->state = SRB_UNEXPECT_RESEL;
2675 dcb->active_srb = srb;
2676 srb->msgout_buf[0] = MSG_ABORT_TAG;
2677 srb->msg_count = 1;
2678 DC395x_ENABLE_MSGOUT;
2679 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2680 return srb;
2681 }
2682
2683
2684 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2685 struct DeviceCtlBlk *dcb)
2686 {
2687 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2688 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2689 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2690 set_xfer_rate(acb, dcb);
2691 }
2692
2693
2694 /* set async transfer mode */
2695 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2696 {
2697 struct DeviceCtlBlk *dcb = srb->dcb;
2698 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2699 dcb->target_id, dcb->target_lun);
2700
2701 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2702 dcb->sync_mode |= SYNC_NEGO_DONE;
2703 /*dcb->sync_period &= 0; */
2704 dcb->sync_offset = 0;
2705 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2706 srb->state &= ~SRB_DO_SYNC_NEGO;
2707 reprogram_regs(acb, dcb);
2708 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2709 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2710 build_wdtr(acb, dcb, srb);
2711 DC395x_ENABLE_MSGOUT;
2712 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2713 }
2714 }
2715
2716
2717 /* set sync transfer mode */
2718 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2719 {
2720 struct DeviceCtlBlk *dcb = srb->dcb;
2721 u8 bval;
2722 int fact;
2723 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2724 "(%02i.%01i MHz) Offset %i\n",
2725 dcb->target_id, srb->msgin_buf[3] << 2,
2726 (250 / srb->msgin_buf[3]),
2727 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2728 srb->msgin_buf[4]);
2729
2730 if (srb->msgin_buf[4] > 15)
2731 srb->msgin_buf[4] = 15;
2732 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2733 dcb->sync_offset = 0;
2734 else if (dcb->sync_offset == 0)
2735 dcb->sync_offset = srb->msgin_buf[4];
2736 if (srb->msgin_buf[4] > dcb->sync_offset)
2737 srb->msgin_buf[4] = dcb->sync_offset;
2738 else
2739 dcb->sync_offset = srb->msgin_buf[4];
2740 bval = 0;
2741 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2742 || dcb->min_nego_period >
2743 clock_period[bval]))
2744 bval++;
2745 if (srb->msgin_buf[3] < clock_period[bval])
2746 dprintkl(KERN_INFO,
2747 "msgin_set_sync: Increase sync nego period to %ins\n",
2748 clock_period[bval] << 2);
2749 srb->msgin_buf[3] = clock_period[bval];
2750 dcb->sync_period &= 0xf0;
2751 dcb->sync_period |= ALT_SYNC | bval;
2752 dcb->min_nego_period = srb->msgin_buf[3];
2753
2754 if (dcb->sync_period & WIDE_SYNC)
2755 fact = 500;
2756 else
2757 fact = 250;
2758
2759 dprintkl(KERN_INFO,
2760 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2761 dcb->target_id, (fact == 500) ? "Wide16" : "",
2762 dcb->min_nego_period << 2, dcb->sync_offset,
2763 (fact / dcb->min_nego_period),
2764 ((fact % dcb->min_nego_period) * 10 +
2765 dcb->min_nego_period / 2) / dcb->min_nego_period);
2766
2767 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2768 /* Reply with corrected SDTR Message */
2769 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2770 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2771
2772 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2773 srb->msg_count = 5;
2774 DC395x_ENABLE_MSGOUT;
2775 dcb->sync_mode |= SYNC_NEGO_DONE;
2776 } else {
2777 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2778 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2779 build_wdtr(acb, dcb, srb);
2780 DC395x_ENABLE_MSGOUT;
2781 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2782 }
2783 }
2784 srb->state &= ~SRB_DO_SYNC_NEGO;
2785 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2786
2787 reprogram_regs(acb, dcb);
2788 }
2789
2790
2791 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2792 struct ScsiReqBlk *srb)
2793 {
2794 struct DeviceCtlBlk *dcb = srb->dcb;
2795 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2796
2797 dcb->sync_period &= ~WIDE_SYNC;
2798 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2799 dcb->sync_mode |= WIDE_NEGO_DONE;
2800 srb->state &= ~SRB_DO_WIDE_NEGO;
2801 reprogram_regs(acb, dcb);
2802 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2803 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2804 build_sdtr(acb, dcb, srb);
2805 DC395x_ENABLE_MSGOUT;
2806 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2807 }
2808 }
2809
2810 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2811 {
2812 struct DeviceCtlBlk *dcb = srb->dcb;
2813 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2814 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2815 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2816
2817 if (srb->msgin_buf[3] > wide)
2818 srb->msgin_buf[3] = wide;
2819 /* Completed */
2820 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2821 dprintkl(KERN_DEBUG,
2822 "msgin_set_wide: Wide nego initiated <%02i>\n",
2823 dcb->target_id);
2824 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2825 srb->msg_count = 4;
2826 srb->state |= SRB_DO_WIDE_NEGO;
2827 DC395x_ENABLE_MSGOUT;
2828 }
2829
2830 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2831 if (srb->msgin_buf[3] > 0)
2832 dcb->sync_period |= WIDE_SYNC;
2833 else
2834 dcb->sync_period &= ~WIDE_SYNC;
2835 srb->state &= ~SRB_DO_WIDE_NEGO;
2836 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2837 dprintkdbg(DBG_1,
2838 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2839 (8 << srb->msgin_buf[3]), dcb->target_id);
2840 reprogram_regs(acb, dcb);
2841 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2842 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2843 build_sdtr(acb, dcb, srb);
2844 DC395x_ENABLE_MSGOUT;
2845 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2846 }
2847 }
2848
2849
2850 /*
2851 * extended message codes:
2852 *
2853 * code description
2854 *
2855 * 02h Reserved
2856 * 00h MODIFY DATA POINTER
2857 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2858 * 03h WIDE DATA TRANSFER REQUEST
2859 * 04h - 7Fh Reserved
2860 * 80h - FFh Vendor specific
2861 */
2862 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2863 u16 *pscsi_status)
2864 {
2865 struct DeviceCtlBlk *dcb = acb->active_dcb;
2866 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->serial_number);
2867
2868 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2869 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2870 /* Now eval the msg */
2871 switch (srb->msgin_buf[0]) {
2872 case DISCONNECT:
2873 srb->state = SRB_DISCONNECT;
2874 break;
2875
2876 case SIMPLE_QUEUE_TAG:
2877 case HEAD_OF_QUEUE_TAG:
2878 case ORDERED_QUEUE_TAG:
2879 srb =
2880 msgin_qtag(acb, dcb,
2881 srb->msgin_buf[1]);
2882 break;
2883
2884 case MESSAGE_REJECT:
2885 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2886 DO_CLRATN | DO_DATALATCH);
2887 /* A sync nego message was rejected ! */
2888 if (srb->state & SRB_DO_SYNC_NEGO) {
2889 msgin_set_async(acb, srb);
2890 break;
2891 }
2892 /* A wide nego message was rejected ! */
2893 if (srb->state & SRB_DO_WIDE_NEGO) {
2894 msgin_set_nowide(acb, srb);
2895 break;
2896 }
2897 enable_msgout_abort(acb, srb);
2898 /*srb->state |= SRB_ABORT_SENT */
2899 break;
2900
2901 case EXTENDED_MESSAGE:
2902 /* SDTR */
2903 if (srb->msgin_buf[1] == 3
2904 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2905 msgin_set_sync(acb, srb);
2906 break;
2907 }
2908 /* WDTR */
2909 if (srb->msgin_buf[1] == 2
2910 && srb->msgin_buf[2] == EXTENDED_WDTR
2911 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2912 msgin_set_wide(acb, srb);
2913 break;
2914 }
2915 msgin_reject(acb, srb);
2916 break;
2917
2918 case MSG_IGNOREWIDE:
2919 /* Discard wide residual */
2920 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2921 break;
2922
2923 case COMMAND_COMPLETE:
2924 /* nothing has to be done */
2925 break;
2926
2927 case SAVE_POINTERS:
2928 /*
2929 * SAVE POINTER may be ignored as we have the struct
2930 * ScsiReqBlk* associated with the scsi command.
2931 */
2932 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2933 "SAVE POINTER rem=%i Ignore\n",
2934 srb->cmd->serial_number, srb->total_xfer_length);
2935 break;
2936
2937 case RESTORE_POINTERS:
2938 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2939 break;
2940
2941 case ABORT:
2942 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2943 "<%02i-%i> ABORT msg\n",
2944 srb->cmd->serial_number, dcb->target_id,
2945 dcb->target_lun);
2946 dcb->flag |= ABORT_DEV_;
2947 enable_msgout_abort(acb, srb);
2948 break;
2949
2950 default:
2951 /* reject unknown messages */
2952 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2953 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2954 srb->msg_count = 1;
2955 srb->msgout_buf[0] = dcb->identify_msg;
2956 DC395x_ENABLE_MSGOUT;
2957 srb->state |= SRB_MSGOUT;
2958 /*break; */
2959 }
2960 msgin_reject(acb, srb);
2961 }
2962
2963 /* Clear counter and MsgIn state */
2964 srb->state &= ~SRB_MSGIN;
2965 acb->msg_len = 0;
2966 }
2967 *pscsi_status = PH_BUS_FREE;
2968 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2969 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2970 }
2971
2972
2973 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2974 u16 *pscsi_status)
2975 {
2976 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->serial_number);
2977 clear_fifo(acb, "msgin_phase1");
2978 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2979 if (!(srb->state & SRB_MSGIN)) {
2980 srb->state &= ~SRB_DISCONNECT;
2981 srb->state |= SRB_MSGIN;
2982 }
2983 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2984 /* SCSI command */
2985 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2986 }
2987
2988
2989 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2990 u16 *pscsi_status)
2991 {
2992 }
2993
2994
2995 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2996 u16 *pscsi_status)
2997 {
2998 }
2999
3000
3001 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3002 {
3003 struct DeviceCtlBlk *i;
3004
3005 /* set all lun device's period, offset */
3006 if (dcb->identify_msg & 0x07)
3007 return;
3008
3009 if (acb->scan_devices) {
3010 current_sync_offset = dcb->sync_offset;
3011 return;
3012 }
3013
3014 list_for_each_entry(i, &acb->dcb_list, list)
3015 if (i->target_id == dcb->target_id) {
3016 i->sync_period = dcb->sync_period;
3017 i->sync_offset = dcb->sync_offset;
3018 i->sync_mode = dcb->sync_mode;
3019 i->min_nego_period = dcb->min_nego_period;
3020 }
3021 }
3022
3023
3024 static void disconnect(struct AdapterCtlBlk *acb)
3025 {
3026 struct DeviceCtlBlk *dcb = acb->active_dcb;
3027 struct ScsiReqBlk *srb;
3028
3029 if (!dcb) {
3030 dprintkl(KERN_ERR, "disconnect: No such device\n");
3031 udelay(500);
3032 /* Suspend queue for a while */
3033 acb->scsi_host->last_reset =
3034 jiffies + HZ / 2 +
3035 HZ * acb->eeprom.delay_time;
3036 clear_fifo(acb, "disconnectEx");
3037 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3038 return;
3039 }
3040 srb = dcb->active_srb;
3041 acb->active_dcb = NULL;
3042 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->serial_number);
3043
3044 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3045 clear_fifo(acb, "disconnect");
3046 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3047 if (srb->state & SRB_UNEXPECT_RESEL) {
3048 dprintkl(KERN_ERR,
3049 "disconnect: Unexpected reselection <%02i-%i>\n",
3050 dcb->target_id, dcb->target_lun);
3051 srb->state = 0;
3052 waiting_process_next(acb);
3053 } else if (srb->state & SRB_ABORT_SENT) {
3054 dcb->flag &= ~ABORT_DEV_;
3055 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3056 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3057 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3058 waiting_process_next(acb);
3059 } else {
3060 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3061 || !(srb->
3062 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3063 /*
3064 * Selection time out
3065 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3066 */
3067 /* Unexp. Disc / Sel Timeout */
3068 if (srb->state != SRB_START_
3069 && srb->state != SRB_MSGOUT) {
3070 srb->state = SRB_READY;
3071 dprintkl(KERN_DEBUG,
3072 "disconnect: (pid#%li) Unexpected\n",
3073 srb->cmd->serial_number);
3074 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3075 goto disc1;
3076 } else {
3077 /* Normal selection timeout */
3078 dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
3079 "<%02i-%i> SelTO\n", srb->cmd->serial_number,
3080 dcb->target_id, dcb->target_lun);
3081 if (srb->retry_count++ > DC395x_MAX_RETRIES
3082 || acb->scan_devices) {
3083 srb->target_status =
3084 SCSI_STAT_SEL_TIMEOUT;
3085 goto disc1;
3086 }
3087 free_tag(dcb, srb);
3088 srb_going_to_waiting_move(dcb, srb);
3089 dprintkdbg(DBG_KG,
3090 "disconnect: (pid#%li) Retry\n",
3091 srb->cmd->serial_number);
3092 waiting_set_timer(acb, HZ / 20);
3093 }
3094 } else if (srb->state & SRB_DISCONNECT) {
3095 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3096 /*
3097 * SRB_DISCONNECT (This is what we expect!)
3098 */
3099 if (bval & 0x40) {
3100 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3101 " 0x%02x: ACK set! Other controllers?\n",
3102 bval);
3103 /* It could come from another initiator, therefore don't do much ! */
3104 } else
3105 waiting_process_next(acb);
3106 } else if (srb->state & SRB_COMPLETED) {
3107 disc1:
3108 /*
3109 ** SRB_COMPLETED
3110 */
3111 free_tag(dcb, srb);
3112 dcb->active_srb = NULL;
3113 srb->state = SRB_FREE;
3114 srb_done(acb, dcb, srb);
3115 }
3116 }
3117 }
3118
3119
3120 static void reselect(struct AdapterCtlBlk *acb)
3121 {
3122 struct DeviceCtlBlk *dcb = acb->active_dcb;
3123 struct ScsiReqBlk *srb = NULL;
3124 u16 rsel_tar_lun_id;
3125 u8 id, lun;
3126 u8 arblostflag = 0;
3127 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3128
3129 clear_fifo(acb, "reselect");
3130 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3131 /* Read Reselected Target ID and LUN */
3132 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3133 if (dcb) { /* Arbitration lost but Reselection win */
3134 srb = dcb->active_srb;
3135 if (!srb) {
3136 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3137 "but active_srb == NULL\n");
3138 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3139 return;
3140 }
3141 /* Why the if ? */
3142 if (!acb->scan_devices) {
3143 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
3144 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3145 srb->cmd->serial_number, dcb->target_id,
3146 dcb->target_lun, rsel_tar_lun_id,
3147 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3148 arblostflag = 1;
3149 /*srb->state |= SRB_DISCONNECT; */
3150
3151 srb->state = SRB_READY;
3152 free_tag(dcb, srb);
3153 srb_going_to_waiting_move(dcb, srb);
3154 waiting_set_timer(acb, HZ / 20);
3155
3156 /* return; */
3157 }
3158 }
3159 /* Read Reselected Target Id and LUN */
3160 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3161 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3162 "Got %i!\n", rsel_tar_lun_id);
3163 id = rsel_tar_lun_id & 0xff;
3164 lun = (rsel_tar_lun_id >> 8) & 7;
3165 dcb = find_dcb(acb, id, lun);
3166 if (!dcb) {
3167 dprintkl(KERN_ERR, "reselect: From non existent device "
3168 "<%02i-%i>\n", id, lun);
3169 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3170 return;
3171 }
3172 acb->active_dcb = dcb;
3173
3174 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3175 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3176 "disconnection? <%02i-%i>\n",
3177 dcb->target_id, dcb->target_lun);
3178
3179 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3180 srb = acb->tmp_srb;
3181 dcb->active_srb = srb;
3182 } else {
3183 /* There can be only one! */
3184 srb = dcb->active_srb;
3185 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3186 /*
3187 * abort command
3188 */
3189 dprintkl(KERN_DEBUG,
3190 "reselect: w/o disconnected cmds <%02i-%i>\n",
3191 dcb->target_id, dcb->target_lun);
3192 srb = acb->tmp_srb;
3193 srb->state = SRB_UNEXPECT_RESEL;
3194 dcb->active_srb = srb;
3195 enable_msgout_abort(acb, srb);
3196 } else {
3197 if (dcb->flag & ABORT_DEV_) {
3198 /*srb->state = SRB_ABORT_SENT; */
3199 enable_msgout_abort(acb, srb);
3200 } else
3201 srb->state = SRB_DATA_XFER;
3202
3203 }
3204 }
3205 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3206
3207 /* Program HA ID, target ID, period and offset */
3208 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3209 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3210 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3211 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3212 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3213 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3214 /* SCSI command */
3215 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3216 }
3217
3218
3219 static inline u8 tagq_blacklist(char *name)
3220 {
3221 #ifndef DC395x_NO_TAGQ
3222 #if 0
3223 u8 i;
3224 for (i = 0; i < BADDEVCNT; i++)
3225 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3226 return 1;
3227 #endif
3228 return 0;
3229 #else
3230 return 1;
3231 #endif
3232 }
3233
3234
3235 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3236 {
3237 /* Check for SCSI format (ANSI and Response data format) */
3238 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3239 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3240 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3241 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3242 /* ((dcb->dev_type == TYPE_DISK)
3243 || (dcb->dev_type == TYPE_MOD)) && */
3244 !tagq_blacklist(((char *)ptr) + 8)) {
3245 if (dcb->max_command == 1)
3246 dcb->max_command =
3247 dcb->acb->tag_max_num;
3248 dcb->sync_mode |= EN_TAG_QUEUEING;
3249 /*dcb->tag_mask = 0; */
3250 } else
3251 dcb->max_command = 1;
3252 }
3253 }
3254
3255
3256 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3257 struct ScsiInqData *ptr)
3258 {
3259 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3260 dcb->dev_type = bval1;
3261 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3262 disc_tagq_set(dcb, ptr);
3263 }
3264
3265
3266 /* unmap mapped pci regions from SRB */
3267 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3268 {
3269 struct scsi_cmnd *cmd = srb->cmd;
3270 enum dma_data_direction dir = cmd->sc_data_direction;
3271
3272 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3273 /* unmap DC395x SG list */
3274 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3275 srb->sg_bus_addr, SEGMENTX_LEN);
3276 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3277 SEGMENTX_LEN,
3278 PCI_DMA_TODEVICE);
3279 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3280 scsi_sg_count(cmd), scsi_bufflen(cmd));
3281 /* unmap the sg segments */
3282 scsi_dma_unmap(cmd);
3283 }
3284 }
3285
3286
3287 /* unmap mapped pci sense buffer from SRB */
3288 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3289 struct ScsiReqBlk *srb)
3290 {
3291 if (!(srb->flag & AUTO_REQSENSE))
3292 return;
3293 /* Unmap sense buffer */
3294 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3295 srb->segment_x[0].address);
3296 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3297 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3298 /* Restore SG stuff */
3299 srb->total_xfer_length = srb->xferred;
3300 srb->segment_x[0].address =
3301 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3302 srb->segment_x[0].length =
3303 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3304 }
3305
3306
3307 /*
3308 * Complete execution of a SCSI command
3309 * Signal completion to the generic SCSI driver
3310 */
3311 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3312 struct ScsiReqBlk *srb)
3313 {
3314 u8 tempcnt, status;
3315 struct scsi_cmnd *cmd = srb->cmd;
3316 enum dma_data_direction dir = cmd->sc_data_direction;
3317 int ckc_only = 1;
3318
3319 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->serial_number,
3320 srb->cmd->device->id, srb->cmd->device->lun);
3321 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3322 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3323 scsi_sgtalbe(cmd));
3324 status = srb->target_status;
3325 if (srb->flag & AUTO_REQSENSE) {
3326 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3327 pci_unmap_srb_sense(acb, srb);
3328 /*
3329 ** target status..........................
3330 */
3331 srb->flag &= ~AUTO_REQSENSE;
3332 srb->adapter_status = 0;
3333 srb->target_status = CHECK_CONDITION << 1;
3334 if (debug_enabled(DBG_1)) {
3335 switch (cmd->sense_buffer[2] & 0x0f) {
3336 case NOT_READY:
3337 dprintkl(KERN_DEBUG,
3338 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3339 cmd->cmnd[0], dcb->target_id,
3340 dcb->target_lun, status, acb->scan_devices);
3341 break;
3342 case UNIT_ATTENTION:
3343 dprintkl(KERN_DEBUG,
3344 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3345 cmd->cmnd[0], dcb->target_id,
3346 dcb->target_lun, status, acb->scan_devices);
3347 break;
3348 case ILLEGAL_REQUEST:
3349 dprintkl(KERN_DEBUG,
3350 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3351 cmd->cmnd[0], dcb->target_id,
3352 dcb->target_lun, status, acb->scan_devices);
3353 break;
3354 case MEDIUM_ERROR:
3355 dprintkl(KERN_DEBUG,
3356 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3357 cmd->cmnd[0], dcb->target_id,
3358 dcb->target_lun, status, acb->scan_devices);
3359 break;
3360 case HARDWARE_ERROR:
3361 dprintkl(KERN_DEBUG,
3362 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3363 cmd->cmnd[0], dcb->target_id,
3364 dcb->target_lun, status, acb->scan_devices);
3365 break;
3366 }
3367 if (cmd->sense_buffer[7] >= 6)
3368 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3369 "(0x%08x 0x%08x)\n",
3370 cmd->sense_buffer[2], cmd->sense_buffer[12],
3371 cmd->sense_buffer[13],
3372 *((unsigned int *)(cmd->sense_buffer + 3)),
3373 *((unsigned int *)(cmd->sense_buffer + 8)));
3374 else
3375 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3376 cmd->sense_buffer[2],
3377 *((unsigned int *)(cmd->sense_buffer + 3)));
3378 }
3379
3380 if (status == (CHECK_CONDITION << 1)) {
3381 cmd->result = DID_BAD_TARGET << 16;
3382 goto ckc_e;
3383 }
3384 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3385
3386 if (srb->total_xfer_length
3387 && srb->total_xfer_length >= cmd->underflow)
3388 cmd->result =
3389 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3390 srb->end_message, CHECK_CONDITION);
3391 /*SET_RES_DID(cmd->result,DID_OK) */
3392 else
3393 cmd->result =
3394 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3395 srb->end_message, CHECK_CONDITION);
3396
3397 goto ckc_e;
3398 }
3399
3400 /*************************************************************/
3401 if (status) {
3402 /*
3403 * target status..........................
3404 */
3405 if (status_byte(status) == CHECK_CONDITION) {
3406 request_sense(acb, dcb, srb);
3407 return;
3408 } else if (status_byte(status) == QUEUE_FULL) {
3409 tempcnt = (u8)list_size(&dcb->srb_going_list);
3410 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3411 dcb->target_id, dcb->target_lun, tempcnt);
3412 if (tempcnt > 1)
3413 tempcnt--;
3414 dcb->max_command = tempcnt;
3415 free_tag(dcb, srb);
3416 srb_going_to_waiting_move(dcb, srb);
3417 waiting_set_timer(acb, HZ / 20);
3418 srb->adapter_status = 0;
3419 srb->target_status = 0;
3420 return;
3421 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3422 srb->adapter_status = H_SEL_TIMEOUT;
3423 srb->target_status = 0;
3424 cmd->result = DID_NO_CONNECT << 16;
3425 } else {
3426 srb->adapter_status = 0;
3427 SET_RES_DID(cmd->result, DID_ERROR);
3428 SET_RES_MSG(cmd->result, srb->end_message);
3429 SET_RES_TARGET(cmd->result, status);
3430
3431 }
3432 } else {
3433 /*
3434 ** process initiator status..........................
3435 */
3436 status = srb->adapter_status;
3437 if (status & H_OVER_UNDER_RUN) {
3438 srb->target_status = 0;
3439 SET_RES_DID(cmd->result, DID_OK);
3440 SET_RES_MSG(cmd->result, srb->end_message);
3441 } else if (srb->status & PARITY_ERROR) {
3442 SET_RES_DID(cmd->result, DID_PARITY);
3443 SET_RES_MSG(cmd->result, srb->end_message);
3444 } else { /* No error */
3445
3446 srb->adapter_status = 0;
3447 srb->target_status = 0;
3448 SET_RES_DID(cmd->result, DID_OK);
3449 }
3450 }
3451
3452 if (dir != PCI_DMA_NONE && scsi_sg_count(cmd))
3453 pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd),
3454 scsi_sg_count(cmd), dir);
3455
3456 ckc_only = 0;
3457 /* Check Error Conditions */
3458 ckc_e:
3459
3460 if (cmd->cmnd[0] == INQUIRY) {
3461 unsigned char *base = NULL;
3462 struct ScsiInqData *ptr;
3463 unsigned long flags = 0;
3464 struct scatterlist* sg = scsi_sglist(cmd);
3465 size_t offset = 0, len = sizeof(struct ScsiInqData);
3466
3467 local_irq_save(flags);
3468 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3469 ptr = (struct ScsiInqData *)(base + offset);
3470
3471 if (!ckc_only && (cmd->result & RES_DID) == 0
3472 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3473 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3474 dcb->inquiry7 = ptr->Flags;
3475
3476 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3477 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3478 if ((cmd->result == (DID_OK << 16)
3479 || status_byte(cmd->result) &
3480 CHECK_CONDITION)) {
3481 if (!dcb->init_tcq_flag) {
3482 add_dev(acb, dcb, ptr);
3483 dcb->init_tcq_flag = 1;
3484 }
3485 }
3486
3487 scsi_kunmap_atomic_sg(base);
3488 local_irq_restore(flags);
3489 }
3490
3491 /* Here is the info for Doug Gilbert's sg3 ... */
3492 scsi_set_resid(cmd, srb->total_xfer_length);
3493 /* This may be interpreted by sb. or not ... */
3494 cmd->SCp.this_residual = srb->total_xfer_length;
3495 cmd->SCp.buffers_residual = 0;
3496 if (debug_enabled(DBG_KG)) {
3497 if (srb->total_xfer_length)
3498 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
3499 "cmnd=0x%02x Missed %i bytes\n",
3500 cmd->serial_number, cmd->device->id, cmd->device->lun,
3501 cmd->cmnd[0], srb->total_xfer_length);
3502 }
3503
3504 srb_going_remove(dcb, srb);
3505 /* Add to free list */
3506 if (srb == acb->tmp_srb)
3507 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3508 else {
3509 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
3510 cmd->serial_number, cmd->result);
3511 srb_free_insert(acb, srb);
3512 }
3513 pci_unmap_srb(acb, srb);
3514
3515 cmd->scsi_done(cmd);
3516 waiting_process_next(acb);
3517 }
3518
3519
3520 /* abort all cmds in our queues */
3521 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3522 struct scsi_cmnd *cmd, u8 force)
3523 {
3524 struct DeviceCtlBlk *dcb;
3525 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3526
3527 list_for_each_entry(dcb, &acb->dcb_list, list) {
3528 struct ScsiReqBlk *srb;
3529 struct ScsiReqBlk *tmp;
3530 struct scsi_cmnd *p;
3531
3532 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3533 enum dma_data_direction dir;
3534 int result;
3535
3536 p = srb->cmd;
3537 dir = p->sc_data_direction;
3538 result = MK_RES(0, did_flag, 0, 0);
3539 printk("G:%li(%02i-%i) ", p->serial_number,
3540 p->device->id, p->device->lun);
3541 srb_going_remove(dcb, srb);
3542 free_tag(dcb, srb);
3543 srb_free_insert(acb, srb);
3544 p->result = result;
3545 pci_unmap_srb_sense(acb, srb);
3546 pci_unmap_srb(acb, srb);
3547 if (force) {
3548 /* For new EH, we normally don't need to give commands back,
3549 * as they all complete or all time out */
3550 p->scsi_done(p);
3551 }
3552 }
3553 if (!list_empty(&dcb->srb_going_list))
3554 dprintkl(KERN_DEBUG,
3555 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3556 dcb->target_id, dcb->target_lun);
3557 if (dcb->tag_mask)
3558 dprintkl(KERN_DEBUG,
3559 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3560 dcb->target_id, dcb->target_lun,
3561 dcb->tag_mask);
3562
3563 /* Waiting queue */
3564 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3565 int result;
3566 p = srb->cmd;
3567
3568 result = MK_RES(0, did_flag, 0, 0);
3569 printk("W:%li<%02i-%i>", p->serial_number, p->device->id,
3570 p->device->lun);
3571 srb_waiting_remove(dcb, srb);
3572 srb_free_insert(acb, srb);
3573 p->result = result;
3574 pci_unmap_srb_sense(acb, srb);
3575 pci_unmap_srb(acb, srb);
3576 if (force) {
3577 /* For new EH, we normally don't need to give commands back,
3578 * as they all complete or all time out */
3579 cmd->scsi_done(cmd);
3580 }
3581 }
3582 if (!list_empty(&dcb->srb_waiting_list))
3583 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3584 list_size(&dcb->srb_waiting_list), dcb->target_id,
3585 dcb->target_lun);
3586 dcb->flag &= ~ABORT_DEV_;
3587 }
3588 printk("\n");
3589 }
3590
3591
3592 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3593 {
3594 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3595 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3596 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3597
3598 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3599 /* nothing */;
3600 }
3601
3602
3603 static void set_basic_config(struct AdapterCtlBlk *acb)
3604 {
3605 u8 bval;
3606 u16 wval;
3607 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3608 if (acb->config & HCC_PARITY)
3609 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3610 else
3611 bval = PHASELATCH | INITIATOR | BLOCKRST;
3612
3613 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3614
3615 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3616 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3617 /* program Host ID */
3618 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3619 /* set ansynchronous transfer */
3620 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3621 /* Turn LED control off */
3622 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3623 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3624 /* DMA config */
3625 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3626 wval |=
3627 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3628 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3629 /* Clear pending interrupt status */
3630 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3631 /* Enable SCSI interrupt */
3632 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3633 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3634 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3635 );
3636 }
3637
3638
3639 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3640 {
3641 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3642 /* delay half a second */
3643 if (timer_pending(&acb->waiting_timer))
3644 del_timer(&acb->waiting_timer);
3645
3646 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3647 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3648 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3649 udelay(500);
3650 /* Maybe we locked up the bus? Then lets wait even longer ... */
3651 acb->scsi_host->last_reset =
3652 jiffies + 5 * HZ / 2 +
3653 HZ * acb->eeprom.delay_time;
3654
3655 clear_fifo(acb, "scsi_reset_detect");
3656 set_basic_config(acb);
3657 /*1.25 */
3658 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3659
3660 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3661 acb->acb_flag |= RESET_DONE;
3662 } else {
3663 acb->acb_flag |= RESET_DETECT;
3664 reset_dev_param(acb);
3665 doing_srb_done(acb, DID_RESET, NULL, 1);
3666 /*DC395x_RecoverSRB( acb ); */
3667 acb->active_dcb = NULL;
3668 acb->acb_flag = 0;
3669 waiting_process_next(acb);
3670 }
3671 }
3672
3673
3674 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3675 struct ScsiReqBlk *srb)
3676 {
3677 struct scsi_cmnd *cmd = srb->cmd;
3678 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
3679 cmd->serial_number, cmd->device->id, cmd->device->lun);
3680
3681 srb->flag |= AUTO_REQSENSE;
3682 srb->adapter_status = 0;
3683 srb->target_status = 0;
3684
3685 /* KG: Can this prevent crap sense data ? */
3686 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3687
3688 /* Save some data */
3689 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3690 srb->segment_x[0].address;
3691 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3692 srb->segment_x[0].length;
3693 srb->xferred = srb->total_xfer_length;
3694 /* srb->segment_x : a one entry of S/G list table */
3695 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3696 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3697 /* Map sense buffer */
3698 srb->segment_x[0].address =
3699 pci_map_single(acb->dev, cmd->sense_buffer,
3700 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3701 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3702 cmd->sense_buffer, srb->segment_x[0].address,
3703 SCSI_SENSE_BUFFERSIZE);
3704 srb->sg_count = 1;
3705 srb->sg_index = 0;
3706
3707 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3708 dprintkl(KERN_DEBUG,
3709 "request_sense: (pid#%li) failed <%02i-%i>\n",
3710 srb->cmd->serial_number, dcb->target_id, dcb->target_lun);
3711 srb_going_to_waiting_move(dcb, srb);
3712 waiting_set_timer(acb, HZ / 100);
3713 }
3714 }
3715
3716
3717 /**
3718 * device_alloc - Allocate a new device instance. This create the
3719 * devices instance and sets up all the data items. The adapter
3720 * instance is required to obtain confiuration information for this
3721 * device. This does *not* add this device to the adapters device
3722 * list.
3723 *
3724 * @acb: The adapter to obtain configuration information from.
3725 * @target: The target for the new device.
3726 * @lun: The lun for the new device.
3727 *
3728 * Return the new device if successful or NULL on failure.
3729 **/
3730 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3731 u8 target, u8 lun)
3732 {
3733 struct NvRamType *eeprom = &acb->eeprom;
3734 u8 period_index = eeprom->target[target].period & 0x07;
3735 struct DeviceCtlBlk *dcb;
3736
3737 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3738 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3739 if (!dcb)
3740 return NULL;
3741 dcb->acb = NULL;
3742 INIT_LIST_HEAD(&dcb->srb_going_list);
3743 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3744 dcb->active_srb = NULL;
3745 dcb->tag_mask = 0;
3746 dcb->max_command = 1;
3747 dcb->target_id = target;
3748 dcb->target_lun = lun;
3749 #ifndef DC395x_NO_DISCONNECT
3750 dcb->identify_msg =
3751 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3752 #else
3753 dcb->identify_msg = IDENTIFY(0, lun);
3754 #endif
3755 dcb->dev_mode = eeprom->target[target].cfg0;
3756 dcb->inquiry7 = 0;
3757 dcb->sync_mode = 0;
3758 dcb->min_nego_period = clock_period[period_index];
3759 dcb->sync_period = 0;
3760 dcb->sync_offset = 0;
3761 dcb->flag = 0;
3762
3763 #ifndef DC395x_NO_WIDE
3764 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3765 && (acb->config & HCC_WIDE_CARD))
3766 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3767 #endif
3768 #ifndef DC395x_NO_SYNC
3769 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3770 if (!(lun) || current_sync_offset)
3771 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3772 #endif
3773 if (dcb->target_lun != 0) {
3774 /* Copy settings */
3775 struct DeviceCtlBlk *p;
3776 list_for_each_entry(p, &acb->dcb_list, list)
3777 if (p->target_id == dcb->target_id)
3778 break;
3779 dprintkdbg(DBG_1,
3780 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3781 dcb->target_id, dcb->target_lun,
3782 p->target_id, p->target_lun);
3783 dcb->sync_mode = p->sync_mode;
3784 dcb->sync_period = p->sync_period;
3785 dcb->min_nego_period = p->min_nego_period;
3786 dcb->sync_offset = p->sync_offset;
3787 dcb->inquiry7 = p->inquiry7;
3788 }
3789 return dcb;
3790 }
3791
3792
3793 /**
3794 * adapter_add_device - Adds the device instance to the adaptor instance.
3795 *
3796 * @acb: The adapter device to be updated
3797 * @dcb: A newly created and intialised device instance to add.
3798 **/
3799 static void adapter_add_device(struct AdapterCtlBlk *acb,
3800 struct DeviceCtlBlk *dcb)
3801 {
3802 /* backpointer to adapter */
3803 dcb->acb = acb;
3804
3805 /* set run_robin to this device if it is currently empty */
3806 if (list_empty(&acb->dcb_list))
3807 acb->dcb_run_robin = dcb;
3808
3809 /* add device to list */
3810 list_add_tail(&dcb->list, &acb->dcb_list);
3811
3812 /* update device maps */
3813 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3814 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3815 }
3816
3817
3818 /**
3819 * adapter_remove_device - Removes the device instance from the adaptor
3820 * instance. The device instance is not check in any way or freed by this.
3821 * The caller is expected to take care of that. This will simply remove the
3822 * device from the adapters data strcutures.
3823 *
3824 * @acb: The adapter device to be updated
3825 * @dcb: A device that has previously been added to the adapter.
3826 **/
3827 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3828 struct DeviceCtlBlk *dcb)
3829 {
3830 struct DeviceCtlBlk *i;
3831 struct DeviceCtlBlk *tmp;
3832 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3833 dcb->target_id, dcb->target_lun);
3834
3835 /* fix up any pointers to this device that we have in the adapter */
3836 if (acb->active_dcb == dcb)
3837 acb->active_dcb = NULL;
3838 if (acb->dcb_run_robin == dcb)
3839 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3840
3841 /* unlink from list */
3842 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3843 if (dcb == i) {
3844 list_del(&i->list);
3845 break;
3846 }
3847
3848 /* clear map and children */
3849 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3850 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3851 dcb->acb = NULL;
3852 }
3853
3854
3855 /**
3856 * adapter_remove_and_free_device - Removes a single device from the adapter
3857 * and then frees the device information.
3858 *
3859 * @acb: The adapter device to be updated
3860 * @dcb: A device that has previously been added to the adapter.
3861 */
3862 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3863 struct DeviceCtlBlk *dcb)
3864 {
3865 if (list_size(&dcb->srb_going_list) > 1) {
3866 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3867 "Won't remove because of %i active requests.\n",
3868 dcb->target_id, dcb->target_lun,
3869 list_size(&dcb->srb_going_list));
3870 return;
3871 }
3872 adapter_remove_device(acb, dcb);
3873 kfree(dcb);
3874 }
3875
3876
3877 /**
3878 * adapter_remove_and_free_all_devices - Removes and frees all of the
3879 * devices associated with the specified adapter.
3880 *
3881 * @acb: The adapter from which all devices should be removed.
3882 **/
3883 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3884 {
3885 struct DeviceCtlBlk *dcb;
3886 struct DeviceCtlBlk *tmp;
3887 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3888 list_size(&acb->dcb_list));
3889
3890 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3891 adapter_remove_and_free_device(acb, dcb);
3892 }
3893
3894
3895 /**
3896 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3897 * scsi device that we need to deal with. We allocate a new device and then
3898 * insert that device into the adapters device list.
3899 *
3900 * @scsi_device: The new scsi device that we need to handle.
3901 **/
3902 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3903 {
3904 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3905 struct DeviceCtlBlk *dcb;
3906
3907 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3908 if (!dcb)
3909 return -ENOMEM;
3910 adapter_add_device(acb, dcb);
3911
3912 return 0;
3913 }
3914
3915
3916 /**
3917 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3918 * device that is going away.
3919 *
3920 * @scsi_device: The new scsi device that we need to handle.
3921 **/
3922 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3923 {
3924 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3925 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3926 if (dcb)
3927 adapter_remove_and_free_device(acb, dcb);
3928 }
3929
3930
3931
3932
3933 /**
3934 * trms1040_wait_30us: wait for 30 us
3935 *
3936 * Waits for 30us (using the chip by the looks of it..)
3937 *
3938 * @io_port: base I/O address
3939 **/
3940 static void __devinit trms1040_wait_30us(unsigned long io_port)
3941 {
3942 /* ScsiPortStallExecution(30); wait 30 us */
3943 outb(5, io_port + TRM_S1040_GEN_TIMER);
3944 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3945 /* nothing */ ;
3946 }
3947
3948
3949 /**
3950 * trms1040_write_cmd - write the secified command and address to
3951 * chip
3952 *
3953 * @io_port: base I/O address
3954 * @cmd: SB + op code (command) to send
3955 * @addr: address to send
3956 **/
3957 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3958 {
3959 int i;
3960 u8 send_data;
3961
3962 /* program SB + OP code */
3963 for (i = 0; i < 3; i++, cmd <<= 1) {
3964 send_data = NVR_SELECT;
3965 if (cmd & 0x04) /* Start from bit 2 */
3966 send_data |= NVR_BITOUT;
3967
3968 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3969 trms1040_wait_30us(io_port);
3970 outb((send_data | NVR_CLOCK),
3971 io_port + TRM_S1040_GEN_NVRAM);
3972 trms1040_wait_30us(io_port);
3973 }
3974
3975 /* send address */
3976 for (i = 0; i < 7; i++, addr <<= 1) {
3977 send_data = NVR_SELECT;
3978 if (addr & 0x40) /* Start from bit 6 */
3979 send_data |= NVR_BITOUT;
3980
3981 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3982 trms1040_wait_30us(io_port);
3983 outb((send_data | NVR_CLOCK),
3984 io_port + TRM_S1040_GEN_NVRAM);
3985 trms1040_wait_30us(io_port);
3986 }
3987 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3988 trms1040_wait_30us(io_port);
3989 }
3990
3991
3992 /**
3993 * trms1040_set_data - store a single byte in the eeprom
3994 *
3995 * Called from write all to write a single byte into the SSEEPROM
3996 * Which is done one bit at a time.
3997 *
3998 * @io_port: base I/O address
3999 * @addr: offset into EEPROM
4000 * @byte: bytes to write
4001 **/
4002 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4003 {
4004 int i;
4005 u8 send_data;
4006
4007 /* Send write command & address */
4008 trms1040_write_cmd(io_port, 0x05, addr);
4009
4010 /* Write data */
4011 for (i = 0; i < 8; i++, byte <<= 1) {
4012 send_data = NVR_SELECT;
4013 if (byte & 0x80) /* Start from bit 7 */
4014 send_data |= NVR_BITOUT;
4015
4016 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4017 trms1040_wait_30us(io_port);
4018 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4019 trms1040_wait_30us(io_port);
4020 }
4021 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4022 trms1040_wait_30us(io_port);
4023
4024 /* Disable chip select */
4025 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4026 trms1040_wait_30us(io_port);
4027
4028 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4029 trms1040_wait_30us(io_port);
4030
4031 /* Wait for write ready */
4032 while (1) {
4033 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4034 trms1040_wait_30us(io_port);
4035
4036 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4037 trms1040_wait_30us(io_port);
4038
4039 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4040 break;
4041 }
4042
4043 /* Disable chip select */
4044 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4045 }
4046
4047
4048 /**
4049 * trms1040_write_all - write 128 bytes to the eeprom
4050 *
4051 * Write the supplied 128 bytes to the chips SEEPROM
4052 *
4053 * @eeprom: the data to write
4054 * @io_port: the base io port
4055 **/
4056 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4057 {
4058 u8 *b_eeprom = (u8 *)eeprom;
4059 u8 addr;
4060
4061 /* Enable SEEPROM */
4062 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4063 io_port + TRM_S1040_GEN_CONTROL);
4064
4065 /* write enable */
4066 trms1040_write_cmd(io_port, 0x04, 0xFF);
4067 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4068 trms1040_wait_30us(io_port);
4069
4070 /* write */
4071 for (addr = 0; addr < 128; addr++, b_eeprom++)
4072 trms1040_set_data(io_port, addr, *b_eeprom);
4073
4074 /* write disable */
4075 trms1040_write_cmd(io_port, 0x04, 0x00);
4076 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4077 trms1040_wait_30us(io_port);
4078
4079 /* Disable SEEPROM */
4080 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4081 io_port + TRM_S1040_GEN_CONTROL);
4082 }
4083
4084
4085 /**
4086 * trms1040_get_data - get a single byte from the eeprom
4087 *
4088 * Called from read all to read a single byte into the SSEEPROM
4089 * Which is done one bit at a time.
4090 *
4091 * @io_port: base I/O address
4092 * @addr: offset into SEEPROM
4093 *
4094 * Returns the byte read.
4095 **/
4096 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4097 {
4098 int i;
4099 u8 read_byte;
4100 u8 result = 0;
4101
4102 /* Send read command & address */
4103 trms1040_write_cmd(io_port, 0x06, addr);
4104
4105 /* read data */
4106 for (i = 0; i < 8; i++) {
4107 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4108 trms1040_wait_30us(io_port);
4109 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4110
4111 /* Get data bit while falling edge */
4112 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4113 result <<= 1;
4114 if (read_byte & NVR_BITIN)
4115 result |= 1;
4116
4117 trms1040_wait_30us(io_port);
4118 }
4119
4120 /* Disable chip select */
4121 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4122 return result;
4123 }
4124
4125
4126 /**
4127 * trms1040_read_all - read all bytes from the eeprom
4128 *
4129 * Read the 128 bytes from the SEEPROM.
4130 *
4131 * @eeprom: where to store the data
4132 * @io_port: the base io port
4133 **/
4134 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4135 {
4136 u8 *b_eeprom = (u8 *)eeprom;
4137 u8 addr;
4138
4139 /* Enable SEEPROM */
4140 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4141 io_port + TRM_S1040_GEN_CONTROL);
4142
4143 /* read details */
4144 for (addr = 0; addr < 128; addr++, b_eeprom++)
4145 *b_eeprom = trms1040_get_data(io_port, addr);
4146
4147 /* Disable SEEPROM */
4148 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4149 io_port + TRM_S1040_GEN_CONTROL);
4150 }
4151
4152
4153
4154 /**
4155 * check_eeprom - get and check contents of the eeprom
4156 *
4157 * Read seeprom 128 bytes into the memory provider in eeprom.
4158 * Checks the checksum and if it's not correct it uses a set of default
4159 * values.
4160 *
4161 * @eeprom: caller allocated strcuture to read the eeprom data into
4162 * @io_port: io port to read from
4163 **/
4164 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4165 {
4166 u16 *w_eeprom = (u16 *)eeprom;
4167 u16 w_addr;
4168 u16 cksum;
4169 u32 d_addr;
4170 u32 *d_eeprom;
4171
4172 trms1040_read_all(eeprom, io_port); /* read eeprom */
4173
4174 cksum = 0;
4175 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4176 w_addr++, w_eeprom++)
4177 cksum += *w_eeprom;
4178 if (cksum != 0x1234) {
4179 /*
4180 * Checksum is wrong.
4181 * Load a set of defaults into the eeprom buffer
4182 */
4183 dprintkl(KERN_WARNING,
4184 "EEProm checksum error: using default values and options.\n");
4185 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4186 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4187 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4188 eeprom->sub_sys_id[1] =
4189 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4190 eeprom->sub_class = 0x00;
4191 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4192 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4193 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4194 eeprom->device_id[1] =
4195 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4196 eeprom->reserved = 0x00;
4197
4198 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4199 d_addr < 16; d_addr++, d_eeprom++)
4200 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4201
4202 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4203 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4204 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4205 *d_eeprom = 0x00;
4206
4207 /* Now load defaults (maybe set by boot/module params) */
4208 set_safe_settings();
4209 fix_settings();
4210 eeprom_override(eeprom);
4211
4212 eeprom->cksum = 0x00;
4213 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4214 w_addr < 63; w_addr++, w_eeprom++)
4215 cksum += *w_eeprom;
4216
4217 *w_eeprom = 0x1234 - cksum;
4218 trms1040_write_all(eeprom, io_port);
4219 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4220 } else {
4221 set_safe_settings();
4222 eeprom_index_to_delay(eeprom);
4223 eeprom_override(eeprom);
4224 }
4225 }
4226
4227
4228 /**
4229 * print_eeprom_settings - output the eeprom settings
4230 * to the kernel log so people can see what they were.
4231 *
4232 * @eeprom: The eeprom data strucutre to show details for.
4233 **/
4234 static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4235 {
4236 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4237 eeprom->scsi_id,
4238 eeprom->target[0].period,
4239 clock_speed[eeprom->target[0].period] / 10,
4240 clock_speed[eeprom->target[0].period] % 10,
4241 eeprom->target[0].cfg0);
4242 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4243 eeprom->channel_cfg, eeprom->max_tag,
4244 1 << eeprom->max_tag, eeprom->delay_time);
4245 }
4246
4247
4248 /* Free SG tables */
4249 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4250 {
4251 int i;
4252 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4253
4254 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4255 kfree(acb->srb_array[i].segment_x);
4256 }
4257
4258
4259 /*
4260 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4261 * should never cross a page boundary */
4262 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4263 {
4264 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4265 *SEGMENTX_LEN;
4266 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4267 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4268 int srb_idx = 0;
4269 unsigned i = 0;
4270 struct SGentry *uninitialized_var(ptr);
4271
4272 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4273 acb->srb_array[i].segment_x = NULL;
4274
4275 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4276 while (pages--) {
4277 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4278 if (!ptr) {
4279 adapter_sg_tables_free(acb);
4280 return 1;
4281 }
4282 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4283 PAGE_SIZE, ptr, srb_idx);
4284 i = 0;
4285 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4286 acb->srb_array[srb_idx++].segment_x =
4287 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4288 }
4289 if (i < srbs_per_page)
4290 acb->srb.segment_x =
4291 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4292 else
4293 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4294 return 0;
4295 }
4296
4297
4298
4299 /**
4300 * adapter_print_config - print adapter connection and termination
4301 * config
4302 *
4303 * The io port in the adapter needs to have been set before calling
4304 * this function.
4305 *
4306 * @acb: The adapter to print the information for.
4307 **/
4308 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4309 {
4310 u8 bval;
4311
4312 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4313 dprintkl(KERN_INFO, "%sConnectors: ",
4314 ((bval & WIDESCSI) ? "(Wide) " : ""));
4315 if (!(bval & CON5068))
4316 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4317 if (!(bval & CON68))
4318 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4319 if (!(bval & CON50))
4320 printk("int50 ");
4321 if ((bval & (CON5068 | CON50 | CON68)) ==
4322 0 /*(CON5068 | CON50 | CON68) */ )
4323 printk(" Oops! (All 3?) ");
4324 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4325 printk(" Termination: ");
4326 if (bval & DIS_TERM)
4327 printk("Disabled\n");
4328 else {
4329 if (bval & AUTOTERM)
4330 printk("Auto ");
4331 if (bval & LOW8TERM)
4332 printk("Low ");
4333 if (bval & UP8TERM)
4334 printk("High ");
4335 printk("\n");
4336 }
4337 }
4338
4339
4340 /**
4341 * adapter_init_params - Initialize the various parameters in the
4342 * adapter structure. Note that the pointer to the scsi_host is set
4343 * early (when this instance is created) and the io_port and irq
4344 * values are set later after they have been reserved. This just gets
4345 * everything set to a good starting position.
4346 *
4347 * The eeprom structure in the adapter needs to have been set before
4348 * calling this function.
4349 *
4350 * @acb: The adapter to initialize.
4351 **/
4352 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4353 {
4354 struct NvRamType *eeprom = &acb->eeprom;
4355 int i;
4356
4357 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4358 /* NOTE: acb->io_port_base is set at port registration time */
4359 /* NOTE: acb->io_port_len is set at port registration time */
4360
4361 INIT_LIST_HEAD(&acb->dcb_list);
4362 acb->dcb_run_robin = NULL;
4363 acb->active_dcb = NULL;
4364
4365 INIT_LIST_HEAD(&acb->srb_free_list);
4366 /* temp SRB for Q tag used or abort command used */
4367 acb->tmp_srb = &acb->srb;
4368 init_timer(&acb->waiting_timer);
4369 init_timer(&acb->selto_timer);
4370
4371 acb->srb_count = DC395x_MAX_SRB_CNT;
4372
4373 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4374 /* NOTE: acb->irq_level is set at IRQ registration time */
4375
4376 acb->tag_max_num = 1 << eeprom->max_tag;
4377 if (acb->tag_max_num > 30)
4378 acb->tag_max_num = 30;
4379
4380 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4381 acb->gmode2 = eeprom->channel_cfg;
4382 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4383
4384 if (eeprom->channel_cfg & NAC_SCANLUN)
4385 acb->lun_chk = 1;
4386 acb->scan_devices = 1;
4387
4388 acb->scsi_host->this_id = eeprom->scsi_id;
4389 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4390
4391 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4392 acb->dcb_map[i] = 0;
4393
4394 acb->msg_len = 0;
4395
4396 /* link static array of srbs into the srb free list */
4397 for (i = 0; i < acb->srb_count - 1; i++)
4398 srb_free_insert(acb, &acb->srb_array[i]);
4399 }
4400
4401
4402 /**
4403 * adapter_init_host - Initialize the scsi host instance based on
4404 * values that we have already stored in the adapter instance. There's
4405 * some mention that a lot of these are deprecated, so we won't use
4406 * them (we'll use the ones in the adapter instance) but we'll fill
4407 * them in in case something else needs them.
4408 *
4409 * The eeprom structure, irq and io ports in the adapter need to have
4410 * been set before calling this function.
4411 *
4412 * @host: The scsi host instance to fill in the values for.
4413 **/
4414 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4415 {
4416 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4417 struct NvRamType *eeprom = &acb->eeprom;
4418
4419 host->max_cmd_len = 24;
4420 host->can_queue = DC395x_MAX_CMD_QUEUE;
4421 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4422 host->this_id = (int)eeprom->scsi_id;
4423 host->io_port = acb->io_port_base;
4424 host->n_io_port = acb->io_port_len;
4425 host->dma_channel = -1;
4426 host->unique_id = acb->io_port_base;
4427 host->irq = acb->irq_level;
4428 host->last_reset = jiffies;
4429
4430 host->max_id = 16;
4431 if (host->max_id - 1 == eeprom->scsi_id)
4432 host->max_id--;
4433
4434 #ifdef CONFIG_SCSI_MULTI_LUN
4435 if (eeprom->channel_cfg & NAC_SCANLUN)
4436 host->max_lun = 8;
4437 else
4438 host->max_lun = 1;
4439 #else
4440 host->max_lun = 1;
4441 #endif
4442
4443 }
4444
4445
4446 /**
4447 * adapter_init_chip - Get the chip into a know state and figure out
4448 * some of the settings that apply to this adapter.
4449 *
4450 * The io port in the adapter needs to have been set before calling
4451 * this function. The config will be configured correctly on return.
4452 *
4453 * @acb: The adapter which we are to init.
4454 **/
4455 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4456 {
4457 struct NvRamType *eeprom = &acb->eeprom;
4458
4459 /* Mask all the interrupt */
4460 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4461 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4462
4463 /* Reset SCSI module */
4464 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4465
4466 /* Reset PCI/DMA module */
4467 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4468 udelay(20);
4469
4470 /* program configuration 0 */
4471 acb->config = HCC_AUTOTERM | HCC_PARITY;
4472 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4473 acb->config |= HCC_WIDE_CARD;
4474
4475 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4476 acb->config |= HCC_SCSI_RESET;
4477
4478 if (acb->config & HCC_SCSI_RESET) {
4479 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4480 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4481
4482 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4483 /*spin_unlock_irq (&io_request_lock); */
4484 udelay(500);
4485
4486 acb->scsi_host->last_reset =
4487 jiffies + HZ / 2 +
4488 HZ * acb->eeprom.delay_time;
4489
4490 /*spin_lock_irq (&io_request_lock); */
4491 }
4492 }
4493
4494
4495 /**
4496 * init_adapter - Grab the resource for the card, setup the adapter
4497 * information, set the card into a known state, create the various
4498 * tables etc etc. This basically gets all adapter information all up
4499 * to date, intialised and gets the chip in sync with it.
4500 *
4501 * @host: This hosts adapter structure
4502 * @io_port: The base I/O port
4503 * @irq: IRQ
4504 *
4505 * Returns 0 if the initialization succeeds, any other value on
4506 * failure.
4507 **/
4508 static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4509 unsigned long io_port, u32 io_port_len, unsigned int irq)
4510 {
4511 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4512 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4513 goto failed;
4514 }
4515 /* store port base to indicate we have registered it */
4516 acb->io_port_base = io_port;
4517 acb->io_port_len = io_port_len;
4518
4519 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4520 /* release the region we just claimed */
4521 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4522 goto failed;
4523 }
4524 /* store irq to indicate we have registered it */
4525 acb->irq_level = irq;
4526
4527 /* get eeprom configuration information and command line settings etc */
4528 check_eeprom(&acb->eeprom, io_port);
4529 print_eeprom_settings(&acb->eeprom);
4530
4531 /* setup adapter control block */
4532 adapter_init_params(acb);
4533
4534 /* display card connectors/termination settings */
4535 adapter_print_config(acb);
4536
4537 if (adapter_sg_tables_alloc(acb)) {
4538 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4539 goto failed;
4540 }
4541 adapter_init_scsi_host(acb->scsi_host);
4542 adapter_init_chip(acb);
4543 set_basic_config(acb);
4544
4545 dprintkdbg(DBG_0,
4546 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4547 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4548 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4549 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4550 return 0;
4551
4552 failed:
4553 if (acb->irq_level)
4554 free_irq(acb->irq_level, acb);
4555 if (acb->io_port_base)
4556 release_region(acb->io_port_base, acb->io_port_len);
4557 adapter_sg_tables_free(acb);
4558
4559 return 1;
4560 }
4561
4562
4563 /**
4564 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4565 * stopping all operations and disabling interrupt generation on the
4566 * card.
4567 *
4568 * @acb: The adapter which we are to shutdown.
4569 **/
4570 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4571 {
4572 /* disable interrupts */
4573 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4574 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4575
4576 /* reset the scsi bus */
4577 if (acb->config & HCC_SCSI_RESET)
4578 reset_scsi_bus(acb);
4579
4580 /* clear any pending interrupt state */
4581 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4582 }
4583
4584
4585
4586 /**
4587 * adapter_uninit - Shut down the chip and release any resources that
4588 * we had allocated. Once this returns the adapter should not be used
4589 * anymore.
4590 *
4591 * @acb: The adapter which we are to un-initialize.
4592 **/
4593 static void adapter_uninit(struct AdapterCtlBlk *acb)
4594 {
4595 unsigned long flags;
4596 DC395x_LOCK_IO(acb->scsi_host, flags);
4597
4598 /* remove timers */
4599 if (timer_pending(&acb->waiting_timer))
4600 del_timer(&acb->waiting_timer);
4601 if (timer_pending(&acb->selto_timer))
4602 del_timer(&acb->selto_timer);
4603
4604 adapter_uninit_chip(acb);
4605 adapter_remove_and_free_all_devices(acb);
4606 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4607
4608 if (acb->irq_level)
4609 free_irq(acb->irq_level, acb);
4610 if (acb->io_port_base)
4611 release_region(acb->io_port_base, acb->io_port_len);
4612
4613 adapter_sg_tables_free(acb);
4614 }
4615
4616
4617 #undef SPRINTF
4618 #define SPRINTF(args...) pos += sprintf(pos, args)
4619
4620 #undef YESNO
4621 #define YESNO(YN) \
4622 if (YN) SPRINTF(" Yes ");\
4623 else SPRINTF(" No ")
4624
4625 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4626 char **start, off_t offset, int length, int inout)
4627 {
4628 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4629 int spd, spd1;
4630 char *pos = buffer;
4631 struct DeviceCtlBlk *dcb;
4632 unsigned long flags;
4633 int dev;
4634
4635 if (inout) /* Has data been written to the file ? */
4636 return -EPERM;
4637
4638 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4639 SPRINTF(" Driver Version " DC395X_VERSION "\n");
4640
4641 DC395x_LOCK_IO(acb->scsi_host, flags);
4642
4643 SPRINTF("SCSI Host Nr %i, ", host->host_no);
4644 SPRINTF("DC395U/UW/F DC315/U %s\n",
4645 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4646 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4647 SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4648 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4649
4650 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4651 SPRINTF("AdapterID %i\n", host->this_id);
4652
4653 SPRINTF("tag_max_num %i", acb->tag_max_num);
4654 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4655 SPRINTF(", FilterCfg 0x%02x",
4656 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4657 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4658 /*SPRINTF("\n"); */
4659
4660 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4661 SPRINTF
4662 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4663 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4664 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4665 acb->dcb_map[6], acb->dcb_map[7]);
4666 SPRINTF
4667 (" %02x %02x %02x %02x %02x %02x %02x %02x\n",
4668 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4669 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4670 acb->dcb_map[14], acb->dcb_map[15]);
4671
4672 SPRINTF
4673 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4674
4675 dev = 0;
4676 list_for_each_entry(dcb, &acb->dcb_list, list) {
4677 int nego_period;
4678 SPRINTF("%02i %02i %02i ", dev, dcb->target_id,
4679 dcb->target_lun);
4680 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4681 YESNO(dcb->sync_offset);
4682 YESNO(dcb->sync_period & WIDE_SYNC);
4683 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4684 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4685 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4686 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4687 if (dcb->sync_offset)
4688 SPRINTF(" %03i ns ", nego_period);
4689 else
4690 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4691
4692 if (dcb->sync_offset & 0x0f) {
4693 spd = 1000 / (nego_period);
4694 spd1 = 1000 % (nego_period);
4695 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4696 SPRINTF(" %2i.%1i M %02i ", spd, spd1,
4697 (dcb->sync_offset & 0x0f));
4698 } else
4699 SPRINTF(" ");
4700
4701 /* Add more info ... */
4702 SPRINTF(" %02i\n", dcb->max_command);
4703 dev++;
4704 }
4705
4706 if (timer_pending(&acb->waiting_timer))
4707 SPRINTF("Waiting queue timer running\n");
4708 else
4709 SPRINTF("\n");
4710
4711 list_for_each_entry(dcb, &acb->dcb_list, list) {
4712 struct ScsiReqBlk *srb;
4713 if (!list_empty(&dcb->srb_waiting_list))
4714 SPRINTF("DCB (%02i-%i): Waiting: %i:",
4715 dcb->target_id, dcb->target_lun,
4716 list_size(&dcb->srb_waiting_list));
4717 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4718 SPRINTF(" %li", srb->cmd->serial_number);
4719 if (!list_empty(&dcb->srb_going_list))
4720 SPRINTF("\nDCB (%02i-%i): Going : %i:",
4721 dcb->target_id, dcb->target_lun,
4722 list_size(&dcb->srb_going_list));
4723 list_for_each_entry(srb, &dcb->srb_going_list, list)
4724 SPRINTF(" %li", srb->cmd->serial_number);
4725 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4726 SPRINTF("\n");
4727 }
4728
4729 if (debug_enabled(DBG_1)) {
4730 SPRINTF("DCB list for ACB %p:\n", acb);
4731 list_for_each_entry(dcb, &acb->dcb_list, list) {
4732 SPRINTF("%p -> ", dcb);
4733 }
4734 SPRINTF("END\n");
4735 }
4736
4737 *start = buffer + offset;
4738 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4739
4740 if (pos - buffer < offset)
4741 return 0;
4742 else if (pos - buffer - offset < length)
4743 return pos - buffer - offset;
4744 else
4745 return length;
4746 }
4747
4748
4749 static struct scsi_host_template dc395x_driver_template = {
4750 .module = THIS_MODULE,
4751 .proc_name = DC395X_NAME,
4752 .proc_info = dc395x_proc_info,
4753 .name = DC395X_BANNER " " DC395X_VERSION,
4754 .queuecommand = dc395x_queue_command,
4755 .bios_param = dc395x_bios_param,
4756 .slave_alloc = dc395x_slave_alloc,
4757 .slave_destroy = dc395x_slave_destroy,
4758 .can_queue = DC395x_MAX_CAN_QUEUE,
4759 .this_id = 7,
4760 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4761 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4762 .eh_abort_handler = dc395x_eh_abort,
4763 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4764 .use_clustering = DISABLE_CLUSTERING,
4765 };
4766
4767
4768 /**
4769 * banner_display - Display banner on first instance of driver
4770 * initialized.
4771 **/
4772 static void banner_display(void)
4773 {
4774 static int banner_done = 0;
4775 if (!banner_done)
4776 {
4777 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4778 banner_done = 1;
4779 }
4780 }
4781
4782
4783 /**
4784 * dc395x_init_one - Initialise a single instance of the adapter.
4785 *
4786 * The PCI layer will call this once for each instance of the adapter
4787 * that it finds in the system. The pci_dev strcuture indicates which
4788 * instance we are being called from.
4789 *
4790 * @dev: The PCI device to intialize.
4791 * @id: Looks like a pointer to the entry in our pci device table
4792 * that was actually matched by the PCI subsystem.
4793 *
4794 * Returns 0 on success, or an error code (-ve) on failure.
4795 **/
4796 static int __devinit dc395x_init_one(struct pci_dev *dev,
4797 const struct pci_device_id *id)
4798 {
4799 struct Scsi_Host *scsi_host = NULL;
4800 struct AdapterCtlBlk *acb = NULL;
4801 unsigned long io_port_base;
4802 unsigned int io_port_len;
4803 unsigned int irq;
4804
4805 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4806 banner_display();
4807
4808 if (pci_enable_device(dev))
4809 {
4810 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4811 return -ENODEV;
4812 }
4813 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4814 io_port_len = pci_resource_len(dev, 0);
4815 irq = dev->irq;
4816 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4817
4818 /* allocate scsi host information (includes out adapter) */
4819 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4820 sizeof(struct AdapterCtlBlk));
4821 if (!scsi_host) {
4822 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4823 goto fail;
4824 }
4825 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4826 acb->scsi_host = scsi_host;
4827 acb->dev = dev;
4828
4829 /* initialise the adapter and everything we need */
4830 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4831 dprintkl(KERN_INFO, "adapter init failed\n");
4832 goto fail;
4833 }
4834
4835 pci_set_master(dev);
4836
4837 /* get the scsi mid level to scan for new devices on the bus */
4838 if (scsi_add_host(scsi_host, &dev->dev)) {
4839 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4840 goto fail;
4841 }
4842 pci_set_drvdata(dev, scsi_host);
4843 scsi_scan_host(scsi_host);
4844
4845 return 0;
4846
4847 fail:
4848 if (acb != NULL)
4849 adapter_uninit(acb);
4850 if (scsi_host != NULL)
4851 scsi_host_put(scsi_host);
4852 pci_disable_device(dev);
4853 return -ENODEV;
4854 }
4855
4856
4857 /**
4858 * dc395x_remove_one - Called to remove a single instance of the
4859 * adapter.
4860 *
4861 * @dev: The PCI device to intialize.
4862 **/
4863 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4864 {
4865 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4866 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4867
4868 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4869
4870 scsi_remove_host(scsi_host);
4871 adapter_uninit(acb);
4872 pci_disable_device(dev);
4873 scsi_host_put(scsi_host);
4874 pci_set_drvdata(dev, NULL);
4875 }
4876
4877
4878 static struct pci_device_id dc395x_pci_table[] = {
4879 {
4880 .vendor = PCI_VENDOR_ID_TEKRAM,
4881 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4882 .subvendor = PCI_ANY_ID,
4883 .subdevice = PCI_ANY_ID,
4884 },
4885 {} /* Terminating entry */
4886 };
4887 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4888
4889
4890 static struct pci_driver dc395x_driver = {
4891 .name = DC395X_NAME,
4892 .id_table = dc395x_pci_table,
4893 .probe = dc395x_init_one,
4894 .remove = __devexit_p(dc395x_remove_one),
4895 };
4896
4897
4898 /**
4899 * dc395x_module_init - Module initialization function
4900 *
4901 * Used by both module and built-in driver to initialise this driver.
4902 **/
4903 static int __init dc395x_module_init(void)
4904 {
4905 return pci_register_driver(&dc395x_driver);
4906 }
4907
4908
4909 /**
4910 * dc395x_module_exit - Module cleanup function.
4911 **/
4912 static void __exit dc395x_module_exit(void)
4913 {
4914 pci_unregister_driver(&dc395x_driver);
4915 }
4916
4917
4918 module_init(dc395x_module_init);
4919 module_exit(dc395x_module_exit);
4920
4921 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4922 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4923 MODULE_LICENSE("GPL");
Linux with added FPC-III support