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AFS: Use patched rxrpc_kernel_send_data() correctly
[wrt350n-kernel.git] / drivers / scsi / dc395x.c
blob7b8a3457b6962c78734811fa918978aed2c9b07a
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->pid, 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->pid, 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->pid, 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->pid, 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->pid, 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->pid, 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->pid, 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->pid, 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->pid, 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->pid);
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->pid,
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->pid, 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->pid, 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->pid, 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->pid, 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->pid,
1526 acb->active_dcb->active_srb ?
1527 acb->active_dcb->active_srb->cmd->pid : 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->pid);
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->pid, 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->pid, 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,
1633 sizeof(srb->cmd->sense_buffer));
1634 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1635 } else {
1636 ptr = (u8 *)srb->cmd->cmnd;
1637 for (i = 0; i < srb->cmd->cmd_len; i++)
1638 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1639 }
1640 no_cmd:
1641 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1642 DO_HWRESELECT | DO_DATALATCH);
1643 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1644 /*
1645 * If start_scsi return 1:
1646 * we caught an interrupt (must be reset or reselection ... )
1647 * : Let's process it first!
1648 */
1649 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
1650 srb->cmd->pid, dcb->target_id, dcb->target_lun);
1651 srb->state = SRB_READY;
1652 free_tag(dcb, srb);
1653 srb->msg_count = 0;
1654 return_code = 1;
1655 /* This IRQ should NOT get lost, as we did not acknowledge it */
1656 } else {
1657 /*
1658 * If start_scsi returns 0:
1659 * we know that the SCSI processor is free
1660 */
1661 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1662 dcb->active_srb = srb;
1663 acb->active_dcb = dcb;
1664 return_code = 0;
1665 /* it's important for atn stop */
1666 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1667 DO_DATALATCH | DO_HWRESELECT);
1668 /* SCSI command */
1669 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1670 }
1671 return return_code;
1672 }
1673
1674
1675 #define DC395x_ENABLE_MSGOUT \
1676 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1677 srb->state |= SRB_MSGOUT
1678
1679
1680 /* abort command */
1681 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1682 struct ScsiReqBlk *srb)
1683 {
1684 srb->msgout_buf[0] = ABORT;
1685 srb->msg_count = 1;
1686 DC395x_ENABLE_MSGOUT;
1687 srb->state &= ~SRB_MSGIN;
1688 srb->state |= SRB_MSGOUT;
1689 }
1690
1691
1692 /**
1693 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1694 * have been triggered for this card.
1695 *
1696 * @acb: a pointer to the adpter control block
1697 * @scsi_status: the status return when we checked the card
1698 **/
1699 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1700 u16 scsi_status)
1701 {
1702 struct DeviceCtlBlk *dcb;
1703 struct ScsiReqBlk *srb;
1704 u16 phase;
1705 u8 scsi_intstatus;
1706 unsigned long flags;
1707 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1708 u16 *);
1709
1710 DC395x_LOCK_IO(acb->scsi_host, flags);
1711
1712 /* This acknowledges the IRQ */
1713 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1714 if ((scsi_status & 0x2007) == 0x2002)
1715 dprintkl(KERN_DEBUG,
1716 "COP after COP completed? %04x\n", scsi_status);
1717 if (debug_enabled(DBG_KG)) {
1718 if (scsi_intstatus & INT_SELTIMEOUT)
1719 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1720 }
1721 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1722
1723 if (timer_pending(&acb->selto_timer))
1724 del_timer(&acb->selto_timer);
1725
1726 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1727 disconnect(acb); /* bus free interrupt */
1728 goto out_unlock;
1729 }
1730 if (scsi_intstatus & INT_RESELECTED) {
1731 reselect(acb);
1732 goto out_unlock;
1733 }
1734 if (scsi_intstatus & INT_SELECT) {
1735 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1736 goto out_unlock;
1737 }
1738 if (scsi_intstatus & INT_SCSIRESET) {
1739 scsi_reset_detect(acb);
1740 goto out_unlock;
1741 }
1742 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1743 dcb = acb->active_dcb;
1744 if (!dcb) {
1745 dprintkl(KERN_DEBUG,
1746 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1747 scsi_status, scsi_intstatus);
1748 goto out_unlock;
1749 }
1750 srb = dcb->active_srb;
1751 if (dcb->flag & ABORT_DEV_) {
1752 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1753 enable_msgout_abort(acb, srb);
1754 }
1755
1756 /* software sequential machine */
1757 phase = (u16)srb->scsi_phase;
1758
1759 /*
1760 * 62037 or 62137
1761 * call dc395x_scsi_phase0[]... "phase entry"
1762 * handle every phase before start transfer
1763 */
1764 /* data_out_phase0, phase:0 */
1765 /* data_in_phase0, phase:1 */
1766 /* command_phase0, phase:2 */
1767 /* status_phase0, phase:3 */
1768 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1769 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1770 /* msgout_phase0, phase:6 */
1771 /* msgin_phase0, phase:7 */
1772 dc395x_statev = dc395x_scsi_phase0[phase];
1773 dc395x_statev(acb, srb, &scsi_status);
1774
1775 /*
1776 * if there were any exception occured scsi_status
1777 * will be modify to bus free phase new scsi_status
1778 * transfer out from ... previous dc395x_statev
1779 */
1780 srb->scsi_phase = scsi_status & PHASEMASK;
1781 phase = (u16)scsi_status & PHASEMASK;
1782
1783 /*
1784 * call dc395x_scsi_phase1[]... "phase entry" handle
1785 * every phase to do transfer
1786 */
1787 /* data_out_phase1, phase:0 */
1788 /* data_in_phase1, phase:1 */
1789 /* command_phase1, phase:2 */
1790 /* status_phase1, phase:3 */
1791 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1792 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1793 /* msgout_phase1, phase:6 */
1794 /* msgin_phase1, phase:7 */
1795 dc395x_statev = dc395x_scsi_phase1[phase];
1796 dc395x_statev(acb, srb, &scsi_status);
1797 }
1798 out_unlock:
1799 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1800 }
1801
1802
1803 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1804 {
1805 struct AdapterCtlBlk *acb = dev_id;
1806 u16 scsi_status;
1807 u8 dma_status;
1808 irqreturn_t handled = IRQ_NONE;
1809
1810 /*
1811 * Check for pending interupt
1812 */
1813 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1814 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1815 if (scsi_status & SCSIINTERRUPT) {
1816 /* interupt pending - let's process it! */
1817 dc395x_handle_interrupt(acb, scsi_status);
1818 handled = IRQ_HANDLED;
1819 }
1820 else if (dma_status & 0x20) {
1821 /* Error from the DMA engine */
1822 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1823 #if 0
1824 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1825 if (acb->active_dcb) {
1826 acb->active_dcb-> flag |= ABORT_DEV_;
1827 if (acb->active_dcb->active_srb)
1828 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1829 }
1830 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1831 #else
1832 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1833 acb = NULL;
1834 #endif
1835 handled = IRQ_HANDLED;
1836 }
1837
1838 return handled;
1839 }
1840
1841
1842 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1843 u16 *pscsi_status)
1844 {
1845 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid);
1846 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1847 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1848
1849 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1850 srb->state &= ~SRB_MSGOUT;
1851 }
1852
1853
1854 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1855 u16 *pscsi_status)
1856 {
1857 u16 i;
1858 u8 *ptr;
1859 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid);
1860
1861 clear_fifo(acb, "msgout_phase1");
1862 if (!(srb->state & SRB_MSGOUT)) {
1863 srb->state |= SRB_MSGOUT;
1864 dprintkl(KERN_DEBUG,
1865 "msgout_phase1: (pid#%li) Phase unexpected\n",
1866 srb->cmd->pid); /* So what ? */
1867 }
1868 if (!srb->msg_count) {
1869 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
1870 srb->cmd->pid);
1871 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1872 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1873 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1874 return;
1875 }
1876 ptr = (u8 *)srb->msgout_buf;
1877 for (i = 0; i < srb->msg_count; i++)
1878 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1879 srb->msg_count = 0;
1880 if (srb->msgout_buf[0] == MSG_ABORT)
1881 srb->state = SRB_ABORT_SENT;
1882
1883 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1884 }
1885
1886
1887 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1888 u16 *pscsi_status)
1889 {
1890 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid);
1891 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1892 }
1893
1894
1895 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1896 u16 *pscsi_status)
1897 {
1898 struct DeviceCtlBlk *dcb;
1899 u8 *ptr;
1900 u16 i;
1901 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid);
1902
1903 clear_fifo(acb, "command_phase1");
1904 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1905 if (!(srb->flag & AUTO_REQSENSE)) {
1906 ptr = (u8 *)srb->cmd->cmnd;
1907 for (i = 0; i < srb->cmd->cmd_len; i++) {
1908 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1909 ptr++;
1910 }
1911 } else {
1912 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1913 dcb = acb->active_dcb;
1914 /* target id */
1915 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1916 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1917 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1918 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
1919 sizeof(srb->cmd->sense_buffer));
1920 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1921 }
1922 srb->state |= SRB_COMMAND;
1923 /* it's important for atn stop */
1924 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1925 /* SCSI command */
1926 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1927 }
1928
1929
1930 /*
1931 * Verify that the remaining space in the hw sg lists is the same as
1932 * the count of remaining bytes in srb->total_xfer_length
1933 */
1934 static void sg_verify_length(struct ScsiReqBlk *srb)
1935 {
1936 if (debug_enabled(DBG_SG)) {
1937 unsigned len = 0;
1938 unsigned idx = srb->sg_index;
1939 struct SGentry *psge = srb->segment_x + idx;
1940 for (; idx < srb->sg_count; psge++, idx++)
1941 len += psge->length;
1942 if (len != srb->total_xfer_length)
1943 dprintkdbg(DBG_SG,
1944 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1945 srb->total_xfer_length, len);
1946 }
1947 }
1948
1949
1950 /*
1951 * Compute the next Scatter Gather list index and adjust its length
1952 * and address if necessary
1953 */
1954 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1955 {
1956 u8 idx;
1957 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
1958 struct SGentry *psge = srb->segment_x + srb->sg_index;
1959
1960 dprintkdbg(DBG_0,
1961 "sg_update_list: Transfered %i of %i bytes, %i remain\n",
1962 xferred, srb->total_xfer_length, left);
1963 if (xferred == 0) {
1964 /* nothing to update since we did not transfer any data */
1965 return;
1966 }
1967
1968 sg_verify_length(srb);
1969 srb->total_xfer_length = left; /* update remaining count */
1970 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1971 if (xferred >= psge->length) {
1972 /* Complete SG entries done */
1973 xferred -= psge->length;
1974 } else {
1975 /* Partial SG entry done */
1976 psge->length -= xferred;
1977 psge->address += xferred;
1978 srb->sg_index = idx;
1979 pci_dma_sync_single_for_device(srb->dcb->
1980 acb->dev,
1981 srb->sg_bus_addr,
1982 SEGMENTX_LEN,
1983 PCI_DMA_TODEVICE);
1984 break;
1985 }
1986 psge++;
1987 }
1988 sg_verify_length(srb);
1989 }
1990
1991
1992 /*
1993 * We have transfered a single byte (PIO mode?) and need to update
1994 * the count of bytes remaining (total_xfer_length) and update the sg
1995 * entry to either point to next byte in the current sg entry, or of
1996 * already at the end to point to the start of the next sg entry
1997 */
1998 static void sg_subtract_one(struct ScsiReqBlk *srb)
1999 {
2000 sg_update_list(srb, srb->total_xfer_length - 1);
2001 }
2002
2003
2004 /*
2005 * cleanup_after_transfer
2006 *
2007 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2008 * KG: Currently called from StatusPhase1 ()
2009 * Should probably also be called from other places
2010 * Best might be to call it in DataXXPhase0, if new phase will differ
2011 */
2012 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2013 struct ScsiReqBlk *srb)
2014 {
2015 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2016 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2017 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2018 clear_fifo(acb, "cleanup/in");
2019 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2020 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2021 } else { /* write */
2022 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2023 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2024 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2025 clear_fifo(acb, "cleanup/out");
2026 }
2027 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2028 }
2029
2030
2031 /*
2032 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
2033 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2034 */
2035 #define DC395x_LASTPIO 4
2036
2037
2038 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2039 u16 *pscsi_status)
2040 {
2041 struct DeviceCtlBlk *dcb = srb->dcb;
2042 u16 scsi_status = *pscsi_status;
2043 u32 d_left_counter = 0;
2044 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
2045 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2046
2047 /*
2048 * KG: We need to drain the buffers before we draw any conclusions!
2049 * This means telling the DMA to push the rest into SCSI, telling
2050 * SCSI to push the rest to the bus.
2051 * However, the device might have been the one to stop us (phase
2052 * change), and the data in transit just needs to be accounted so
2053 * it can be retransmitted.)
2054 */
2055 /*
2056 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2057 * If we need more data, the DMA SG list will be freshly set up, anyway
2058 */
2059 dprintkdbg(DBG_PIO, "data_out_phase0: "
2060 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2061 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2062 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2063 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2064 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2065 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2066 srb->total_xfer_length);
2067 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2068
2069 if (!(srb->state & SRB_XFERPAD)) {
2070 if (scsi_status & PARITYERROR)
2071 srb->status |= PARITY_ERROR;
2072
2073 /*
2074 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2075 * is the no of bytes it got from the DMA engine not the no it
2076 * transferred successfully to the device. (And the difference could
2077 * be as much as the FIFO size, I guess ...)
2078 */
2079 if (!(scsi_status & SCSIXFERDONE)) {
2080 /*
2081 * when data transfer from DMA FIFO to SCSI FIFO
2082 * if there was some data left in SCSI FIFO
2083 */
2084 d_left_counter =
2085 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2086 0x1F);
2087 if (dcb->sync_period & WIDE_SYNC)
2088 d_left_counter <<= 1;
2089
2090 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2091 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2092 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2093 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2094 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2095 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2096 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2097 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2098 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2099 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2100 }
2101 /*
2102 * calculate all the residue data that not yet tranfered
2103 * SCSI transfer counter + left in SCSI FIFO data
2104 *
2105 * .....TRM_S1040_SCSI_COUNTER (24bits)
2106 * The counter always decrement by one for every SCSI byte transfer.
2107 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2108 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2109 */
2110 if (srb->total_xfer_length > DC395x_LASTPIO)
2111 d_left_counter +=
2112 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2113
2114 /* Is this a good idea? */
2115 /*clear_fifo(acb, "DOP1"); */
2116 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2117 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2118 && scsi_bufflen(srb->cmd) % 2) {
2119 d_left_counter = 0;
2120 dprintkl(KERN_INFO,
2121 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2122 scsi_status);
2123 }
2124 /*
2125 * KG: Oops again. Same thinko as above: The SCSI might have been
2126 * faster than the DMA engine, so that it ran out of data.
2127 * In that case, we have to do just nothing!
2128 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2129 */
2130 /*
2131 * KG: This is nonsense: We have been WRITING data to the bus
2132 * If the SCSI engine has no bytes left, how should the DMA engine?
2133 */
2134 if (d_left_counter == 0) {
2135 srb->total_xfer_length = 0;
2136 } else {
2137 /*
2138 * if transfer not yet complete
2139 * there were some data residue in SCSI FIFO or
2140 * SCSI transfer counter not empty
2141 */
2142 long oldxferred =
2143 srb->total_xfer_length - d_left_counter;
2144 const int diff =
2145 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2146 sg_update_list(srb, d_left_counter);
2147 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2148 if ((srb->segment_x[srb->sg_index].length ==
2149 diff && scsi_sg_count(srb->cmd))
2150 || ((oldxferred & ~PAGE_MASK) ==
2151 (PAGE_SIZE - diff))
2152 ) {
2153 dprintkl(KERN_INFO, "data_out_phase0: "
2154 "Work around chip bug (%i)?\n", diff);
2155 d_left_counter =
2156 srb->total_xfer_length - diff;
2157 sg_update_list(srb, d_left_counter);
2158 /*srb->total_xfer_length -= diff; */
2159 /*srb->virt_addr += diff; */
2160 /*if (srb->cmd->use_sg) */
2161 /* srb->sg_index++; */
2162 }
2163 }
2164 }
2165 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2166 cleanup_after_transfer(acb, srb);
2167 }
2168 }
2169
2170
2171 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2172 u16 *pscsi_status)
2173 {
2174 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
2175 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2176 clear_fifo(acb, "data_out_phase1");
2177 /* do prepare before transfer when data out phase */
2178 data_io_transfer(acb, srb, XFERDATAOUT);
2179 }
2180
2181 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2182 u16 *pscsi_status)
2183 {
2184 u16 scsi_status = *pscsi_status;
2185
2186 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
2187 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2188
2189 /*
2190 * KG: DataIn is much more tricky than DataOut. When the device is finished
2191 * and switches to another phase, the SCSI engine should be finished too.
2192 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2193 * engine and transferred to memory.
2194 * We should wait for the FIFOs to be emptied by that (is there any way to
2195 * enforce this?) and then stop the DMA engine, because it might think, that
2196 * there are more bytes to follow. Yes, the device might disconnect prior to
2197 * having all bytes transferred!
2198 * Also we should make sure that all data from the DMA engine buffer's really
2199 * made its way to the system memory! Some documentation on this would not
2200 * seem to be a bad idea, actually.
2201 */
2202 if (!(srb->state & SRB_XFERPAD)) {
2203 u32 d_left_counter;
2204 unsigned int sc, fc;
2205
2206 if (scsi_status & PARITYERROR) {
2207 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
2208 "Parity Error\n", srb->cmd->pid);
2209 srb->status |= PARITY_ERROR;
2210 }
2211 /*
2212 * KG: We should wait for the DMA FIFO to be empty ...
2213 * but: it would be better to wait first for the SCSI FIFO and then the
2214 * the DMA FIFO to become empty? How do we know, that the device not already
2215 * sent data to the FIFO in a MsgIn phase, eg.?
2216 */
2217 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2218 #if 0
2219 int ctr = 6000000;
2220 dprintkl(KERN_DEBUG,
2221 "DIP0: Wait for DMA FIFO to flush ...\n");
2222 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2223 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2224 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2225 while (!
2226 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2227 0x80) && --ctr);
2228 if (ctr < 6000000 - 1)
2229 dprintkl(KERN_DEBUG
2230 "DIP0: Had to wait for DMA ...\n");
2231 if (!ctr)
2232 dprintkl(KERN_ERR,
2233 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2234 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2235 #endif
2236 dprintkdbg(DBG_KG, "data_in_phase0: "
2237 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2238 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2239 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2240 }
2241 /* Now: Check remainig data: The SCSI counters should tell us ... */
2242 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2243 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2244 d_left_counter = sc + ((fc & 0x1f)
2245 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2246 0));
2247 dprintkdbg(DBG_KG, "data_in_phase0: "
2248 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2249 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2250 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2251 fc,
2252 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2253 sc,
2254 fc,
2255 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2256 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2257 srb->total_xfer_length, d_left_counter);
2258 #if DC395x_LASTPIO
2259 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
2260 if (d_left_counter
2261 && srb->total_xfer_length <= DC395x_LASTPIO) {
2262 size_t left_io = srb->total_xfer_length;
2263
2264 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2265 /*sg_update_list (srb, d_left_counter); */
2266 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2267 "for remaining %i bytes:",
2268 fc & 0x1f,
2269 (srb->dcb->sync_period & WIDE_SYNC) ?
2270 "words" : "bytes",
2271 srb->total_xfer_length);
2272 if (srb->dcb->sync_period & WIDE_SYNC)
2273 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2274 CFG2_WIDEFIFO);
2275 while (left_io) {
2276 unsigned char *virt, *base = NULL;
2277 unsigned long flags = 0;
2278 size_t len = left_io;
2279 size_t offset = srb->request_length - left_io;
2280
2281 local_irq_save(flags);
2282 /* Assumption: it's inside one page as it's at most 4 bytes and
2283 I just assume it's on a 4-byte boundary */
2284 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2285 srb->sg_count, &offset, &len);
2286 virt = base + offset;
2287
2288 left_io -= len;
2289
2290 while (len) {
2291 u8 byte;
2292 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2293 *virt++ = byte;
2294
2295 if (debug_enabled(DBG_PIO))
2296 printk(" %02x", byte);
2297
2298 d_left_counter--;
2299 sg_subtract_one(srb);
2300
2301 len--;
2302
2303 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2304
2305 if (fc == 0x40) {
2306 left_io = 0;
2307 break;
2308 }
2309 }
2310
2311 WARN_ON((fc != 0x40) == !d_left_counter);
2312
2313 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2314 /* Read the last byte ... */
2315 if (srb->total_xfer_length > 0) {
2316 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2317
2318 *virt++ = byte;
2319 srb->total_xfer_length--;
2320 if (debug_enabled(DBG_PIO))
2321 printk(" %02x", byte);
2322 }
2323
2324 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2325 }
2326
2327 scsi_kunmap_atomic_sg(base);
2328 local_irq_restore(flags);
2329 }
2330 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2331 /*srb->total_xfer_length = 0; */
2332 if (debug_enabled(DBG_PIO))
2333 printk("\n");
2334 }
2335 #endif /* DC395x_LASTPIO */
2336
2337 #if 0
2338 /*
2339 * KG: This was in DATAOUT. Does it also belong here?
2340 * Nobody seems to know what counter and fifo_cnt count exactly ...
2341 */
2342 if (!(scsi_status & SCSIXFERDONE)) {
2343 /*
2344 * when data transfer from DMA FIFO to SCSI FIFO
2345 * if there was some data left in SCSI FIFO
2346 */
2347 d_left_counter =
2348 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2349 0x1F);
2350 if (srb->dcb->sync_period & WIDE_SYNC)
2351 d_left_counter <<= 1;
2352 /*
2353 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2354 * so need to *= 2
2355 * KG: Seems to be correct ...
2356 */
2357 }
2358 #endif
2359 /* KG: This should not be needed any more! */
2360 if (d_left_counter == 0
2361 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2362 #if 0
2363 int ctr = 6000000;
2364 u8 TempDMAstatus;
2365 do {
2366 TempDMAstatus =
2367 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2368 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2369 if (!ctr)
2370 dprintkl(KERN_ERR,
2371 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2372 srb->total_xfer_length = 0;
2373 #endif
2374 srb->total_xfer_length = d_left_counter;
2375 } else { /* phase changed */
2376 /*
2377 * parsing the case:
2378 * when a transfer not yet complete
2379 * but be disconnected by target
2380 * if transfer not yet complete
2381 * there were some data residue in SCSI FIFO or
2382 * SCSI transfer counter not empty
2383 */
2384 sg_update_list(srb, d_left_counter);
2385 }
2386 }
2387 /* KG: The target may decide to disconnect: Empty FIFO before! */
2388 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2389 cleanup_after_transfer(acb, srb);
2390 }
2391 }
2392
2393
2394 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2395 u16 *pscsi_status)
2396 {
2397 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
2398 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2399 data_io_transfer(acb, srb, XFERDATAIN);
2400 }
2401
2402
2403 static void data_io_transfer(struct AdapterCtlBlk *acb,
2404 struct ScsiReqBlk *srb, u16 io_dir)
2405 {
2406 struct DeviceCtlBlk *dcb = srb->dcb;
2407 u8 bval;
2408 dprintkdbg(DBG_0,
2409 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2410 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
2411 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2412 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2413 if (srb == acb->tmp_srb)
2414 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2415 if (srb->sg_index >= srb->sg_count) {
2416 /* can't happen? out of bounds error */
2417 return;
2418 }
2419
2420 if (srb->total_xfer_length > DC395x_LASTPIO) {
2421 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2422 /*
2423 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2424 * Maybe, even ABORTXFER would be appropriate
2425 */
2426 if (dma_status & XFERPENDING) {
2427 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2428 "Expect trouble!\n");
2429 dump_register_info(acb, dcb, srb);
2430 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2431 }
2432 /* clear_fifo(acb, "IO"); */
2433 /*
2434 * load what physical address of Scatter/Gather list table
2435 * want to be transfer
2436 */
2437 srb->state |= SRB_DATA_XFER;
2438 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2439 if (scsi_sg_count(srb->cmd)) { /* with S/G */
2440 io_dir |= DMACMD_SG;
2441 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2442 srb->sg_bus_addr +
2443 sizeof(struct SGentry) *
2444 srb->sg_index);
2445 /* load how many bytes in the sg list table */
2446 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2447 ((u32)(srb->sg_count -
2448 srb->sg_index) << 3));
2449 } else { /* without S/G */
2450 io_dir &= ~DMACMD_SG;
2451 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2452 srb->segment_x[0].address);
2453 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2454 srb->segment_x[0].length);
2455 }
2456 /* load total transfer length (24bits) max value 16Mbyte */
2457 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2458 srb->total_xfer_length);
2459 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2460 if (io_dir & DMACMD_DIR) { /* read */
2461 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2462 SCMD_DMA_IN);
2463 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2464 } else {
2465 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2466 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2467 SCMD_DMA_OUT);
2468 }
2469
2470 }
2471 #if DC395x_LASTPIO
2472 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2473 /*
2474 * load what physical address of Scatter/Gather list table
2475 * want to be transfer
2476 */
2477 srb->state |= SRB_DATA_XFER;
2478 /* load total transfer length (24bits) max value 16Mbyte */
2479 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2480 srb->total_xfer_length);
2481 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2482 if (io_dir & DMACMD_DIR) { /* read */
2483 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2484 SCMD_FIFO_IN);
2485 } else { /* write */
2486 int ln = srb->total_xfer_length;
2487 size_t left_io = srb->total_xfer_length;
2488
2489 if (srb->dcb->sync_period & WIDE_SYNC)
2490 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2491 CFG2_WIDEFIFO);
2492
2493 while (left_io) {
2494 unsigned char *virt, *base = NULL;
2495 unsigned long flags = 0;
2496 size_t len = left_io;
2497 size_t offset = srb->request_length - left_io;
2498
2499 local_irq_save(flags);
2500 /* Again, max 4 bytes */
2501 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2502 srb->sg_count, &offset, &len);
2503 virt = base + offset;
2504
2505 left_io -= len;
2506
2507 while (len--) {
2508 if (debug_enabled(DBG_PIO))
2509 printk(" %02x", *virt);
2510
2511 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2512
2513 sg_subtract_one(srb);
2514 }
2515
2516 scsi_kunmap_atomic_sg(base);
2517 local_irq_restore(flags);
2518 }
2519 if (srb->dcb->sync_period & WIDE_SYNC) {
2520 if (ln % 2) {
2521 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2522 if (debug_enabled(DBG_PIO))
2523 printk(" |00");
2524 }
2525 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2526 }
2527 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2528 if (debug_enabled(DBG_PIO))
2529 printk("\n");
2530 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2531 SCMD_FIFO_OUT);
2532 }
2533 }
2534 #endif /* DC395x_LASTPIO */
2535 else { /* xfer pad */
2536 u8 data = 0, data2 = 0;
2537 if (srb->sg_count) {
2538 srb->adapter_status = H_OVER_UNDER_RUN;
2539 srb->status |= OVER_RUN;
2540 }
2541 /*
2542 * KG: despite the fact that we are using 16 bits I/O ops
2543 * the SCSI FIFO is only 8 bits according to the docs
2544 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2545 */
2546 if (dcb->sync_period & WIDE_SYNC) {
2547 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2548 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2549 CFG2_WIDEFIFO);
2550 if (io_dir & DMACMD_DIR) {
2551 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2552 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2553 } else {
2554 /* Danger, Robinson: If you find KGs
2555 * scattered over the wide disk, the driver
2556 * or chip is to blame :-( */
2557 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2558 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2559 }
2560 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2561 } else {
2562 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2563 /* Danger, Robinson: If you find a collection of Ks on your disk
2564 * something broke :-( */
2565 if (io_dir & DMACMD_DIR)
2566 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2567 else
2568 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2569 }
2570 srb->state |= SRB_XFERPAD;
2571 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2572 /* SCSI command */
2573 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2574 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2575 }
2576 }
2577
2578
2579 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2580 u16 *pscsi_status)
2581 {
2582 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
2583 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2584 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2585 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2586 srb->state = SRB_COMPLETED;
2587 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2588 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2589 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2590 }
2591
2592
2593 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2594 u16 *pscsi_status)
2595 {
2596 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
2597 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2598 srb->state = SRB_STATUS;
2599 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2600 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2601 }
2602
2603
2604 /* Check if the message is complete */
2605 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2606 {
2607 if (*msgbuf == EXTENDED_MESSAGE) {
2608 if (len < 2)
2609 return 0;
2610 if (len < msgbuf[1] + 2)
2611 return 0;
2612 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2613 if (len < 2)
2614 return 0;
2615 return 1;
2616 }
2617
2618 /* reject_msg */
2619 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2620 struct ScsiReqBlk *srb)
2621 {
2622 srb->msgout_buf[0] = MESSAGE_REJECT;
2623 srb->msg_count = 1;
2624 DC395x_ENABLE_MSGOUT;
2625 srb->state &= ~SRB_MSGIN;
2626 srb->state |= SRB_MSGOUT;
2627 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2628 srb->msgin_buf[0],
2629 srb->dcb->target_id, srb->dcb->target_lun);
2630 }
2631
2632
2633 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2634 struct DeviceCtlBlk *dcb, u8 tag)
2635 {
2636 struct ScsiReqBlk *srb = NULL;
2637 struct ScsiReqBlk *i;
2638 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
2639 srb->cmd->pid, tag, srb);
2640
2641 if (!(dcb->tag_mask & (1 << tag)))
2642 dprintkl(KERN_DEBUG,
2643 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2644 dcb->tag_mask, tag);
2645
2646 if (list_empty(&dcb->srb_going_list))
2647 goto mingx0;
2648 list_for_each_entry(i, &dcb->srb_going_list, list) {
2649 if (i->tag_number == tag) {
2650 srb = i;
2651 break;
2652 }
2653 }
2654 if (!srb)
2655 goto mingx0;
2656
2657 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
2658 srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun);
2659 if (dcb->flag & ABORT_DEV_) {
2660 /*srb->state = SRB_ABORT_SENT; */
2661 enable_msgout_abort(acb, srb);
2662 }
2663
2664 if (!(srb->state & SRB_DISCONNECT))
2665 goto mingx0;
2666
2667 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2668 srb->state |= dcb->active_srb->state;
2669 srb->state |= SRB_DATA_XFER;
2670 dcb->active_srb = srb;
2671 /* How can we make the DORS happy? */
2672 return srb;
2673
2674 mingx0:
2675 srb = acb->tmp_srb;
2676 srb->state = SRB_UNEXPECT_RESEL;
2677 dcb->active_srb = srb;
2678 srb->msgout_buf[0] = MSG_ABORT_TAG;
2679 srb->msg_count = 1;
2680 DC395x_ENABLE_MSGOUT;
2681 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2682 return srb;
2683 }
2684
2685
2686 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2687 struct DeviceCtlBlk *dcb)
2688 {
2689 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2690 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2691 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2692 set_xfer_rate(acb, dcb);
2693 }
2694
2695
2696 /* set async transfer mode */
2697 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2698 {
2699 struct DeviceCtlBlk *dcb = srb->dcb;
2700 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2701 dcb->target_id, dcb->target_lun);
2702
2703 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2704 dcb->sync_mode |= SYNC_NEGO_DONE;
2705 /*dcb->sync_period &= 0; */
2706 dcb->sync_offset = 0;
2707 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2708 srb->state &= ~SRB_DO_SYNC_NEGO;
2709 reprogram_regs(acb, dcb);
2710 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2711 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2712 build_wdtr(acb, dcb, srb);
2713 DC395x_ENABLE_MSGOUT;
2714 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2715 }
2716 }
2717
2718
2719 /* set sync transfer mode */
2720 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2721 {
2722 struct DeviceCtlBlk *dcb = srb->dcb;
2723 u8 bval;
2724 int fact;
2725 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2726 "(%02i.%01i MHz) Offset %i\n",
2727 dcb->target_id, srb->msgin_buf[3] << 2,
2728 (250 / srb->msgin_buf[3]),
2729 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2730 srb->msgin_buf[4]);
2731
2732 if (srb->msgin_buf[4] > 15)
2733 srb->msgin_buf[4] = 15;
2734 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2735 dcb->sync_offset = 0;
2736 else if (dcb->sync_offset == 0)
2737 dcb->sync_offset = srb->msgin_buf[4];
2738 if (srb->msgin_buf[4] > dcb->sync_offset)
2739 srb->msgin_buf[4] = dcb->sync_offset;
2740 else
2741 dcb->sync_offset = srb->msgin_buf[4];
2742 bval = 0;
2743 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2744 || dcb->min_nego_period >
2745 clock_period[bval]))
2746 bval++;
2747 if (srb->msgin_buf[3] < clock_period[bval])
2748 dprintkl(KERN_INFO,
2749 "msgin_set_sync: Increase sync nego period to %ins\n",
2750 clock_period[bval] << 2);
2751 srb->msgin_buf[3] = clock_period[bval];
2752 dcb->sync_period &= 0xf0;
2753 dcb->sync_period |= ALT_SYNC | bval;
2754 dcb->min_nego_period = srb->msgin_buf[3];
2755
2756 if (dcb->sync_period & WIDE_SYNC)
2757 fact = 500;
2758 else
2759 fact = 250;
2760
2761 dprintkl(KERN_INFO,
2762 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2763 dcb->target_id, (fact == 500) ? "Wide16" : "",
2764 dcb->min_nego_period << 2, dcb->sync_offset,
2765 (fact / dcb->min_nego_period),
2766 ((fact % dcb->min_nego_period) * 10 +
2767 dcb->min_nego_period / 2) / dcb->min_nego_period);
2768
2769 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2770 /* Reply with corrected SDTR Message */
2771 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2772 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2773
2774 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2775 srb->msg_count = 5;
2776 DC395x_ENABLE_MSGOUT;
2777 dcb->sync_mode |= SYNC_NEGO_DONE;
2778 } else {
2779 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2780 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2781 build_wdtr(acb, dcb, srb);
2782 DC395x_ENABLE_MSGOUT;
2783 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2784 }
2785 }
2786 srb->state &= ~SRB_DO_SYNC_NEGO;
2787 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2788
2789 reprogram_regs(acb, dcb);
2790 }
2791
2792
2793 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2794 struct ScsiReqBlk *srb)
2795 {
2796 struct DeviceCtlBlk *dcb = srb->dcb;
2797 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2798
2799 dcb->sync_period &= ~WIDE_SYNC;
2800 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2801 dcb->sync_mode |= WIDE_NEGO_DONE;
2802 srb->state &= ~SRB_DO_WIDE_NEGO;
2803 reprogram_regs(acb, dcb);
2804 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2805 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2806 build_sdtr(acb, dcb, srb);
2807 DC395x_ENABLE_MSGOUT;
2808 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2809 }
2810 }
2811
2812 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2813 {
2814 struct DeviceCtlBlk *dcb = srb->dcb;
2815 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2816 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2817 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2818
2819 if (srb->msgin_buf[3] > wide)
2820 srb->msgin_buf[3] = wide;
2821 /* Completed */
2822 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2823 dprintkl(KERN_DEBUG,
2824 "msgin_set_wide: Wide nego initiated <%02i>\n",
2825 dcb->target_id);
2826 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2827 srb->msg_count = 4;
2828 srb->state |= SRB_DO_WIDE_NEGO;
2829 DC395x_ENABLE_MSGOUT;
2830 }
2831
2832 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2833 if (srb->msgin_buf[3] > 0)
2834 dcb->sync_period |= WIDE_SYNC;
2835 else
2836 dcb->sync_period &= ~WIDE_SYNC;
2837 srb->state &= ~SRB_DO_WIDE_NEGO;
2838 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2839 dprintkdbg(DBG_1,
2840 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2841 (8 << srb->msgin_buf[3]), dcb->target_id);
2842 reprogram_regs(acb, dcb);
2843 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2844 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2845 build_sdtr(acb, dcb, srb);
2846 DC395x_ENABLE_MSGOUT;
2847 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2848 }
2849 }
2850
2851
2852 /*
2853 * extended message codes:
2854 *
2855 * code description
2856 *
2857 * 02h Reserved
2858 * 00h MODIFY DATA POINTER
2859 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2860 * 03h WIDE DATA TRANSFER REQUEST
2861 * 04h - 7Fh Reserved
2862 * 80h - FFh Vendor specific
2863 */
2864 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2865 u16 *pscsi_status)
2866 {
2867 struct DeviceCtlBlk *dcb = acb->active_dcb;
2868 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid);
2869
2870 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2871 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2872 /* Now eval the msg */
2873 switch (srb->msgin_buf[0]) {
2874 case DISCONNECT:
2875 srb->state = SRB_DISCONNECT;
2876 break;
2877
2878 case SIMPLE_QUEUE_TAG:
2879 case HEAD_OF_QUEUE_TAG:
2880 case ORDERED_QUEUE_TAG:
2881 srb =
2882 msgin_qtag(acb, dcb,
2883 srb->msgin_buf[1]);
2884 break;
2885
2886 case MESSAGE_REJECT:
2887 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2888 DO_CLRATN | DO_DATALATCH);
2889 /* A sync nego message was rejected ! */
2890 if (srb->state & SRB_DO_SYNC_NEGO) {
2891 msgin_set_async(acb, srb);
2892 break;
2893 }
2894 /* A wide nego message was rejected ! */
2895 if (srb->state & SRB_DO_WIDE_NEGO) {
2896 msgin_set_nowide(acb, srb);
2897 break;
2898 }
2899 enable_msgout_abort(acb, srb);
2900 /*srb->state |= SRB_ABORT_SENT */
2901 break;
2902
2903 case EXTENDED_MESSAGE:
2904 /* SDTR */
2905 if (srb->msgin_buf[1] == 3
2906 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2907 msgin_set_sync(acb, srb);
2908 break;
2909 }
2910 /* WDTR */
2911 if (srb->msgin_buf[1] == 2
2912 && srb->msgin_buf[2] == EXTENDED_WDTR
2913 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2914 msgin_set_wide(acb, srb);
2915 break;
2916 }
2917 msgin_reject(acb, srb);
2918 break;
2919
2920 case MSG_IGNOREWIDE:
2921 /* Discard wide residual */
2922 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2923 break;
2924
2925 case COMMAND_COMPLETE:
2926 /* nothing has to be done */
2927 break;
2928
2929 case SAVE_POINTERS:
2930 /*
2931 * SAVE POINTER may be ignored as we have the struct
2932 * ScsiReqBlk* associated with the scsi command.
2933 */
2934 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2935 "SAVE POINTER rem=%i Ignore\n",
2936 srb->cmd->pid, srb->total_xfer_length);
2937 break;
2938
2939 case RESTORE_POINTERS:
2940 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2941 break;
2942
2943 case ABORT:
2944 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2945 "<%02i-%i> ABORT msg\n",
2946 srb->cmd->pid, dcb->target_id,
2947 dcb->target_lun);
2948 dcb->flag |= ABORT_DEV_;
2949 enable_msgout_abort(acb, srb);
2950 break;
2951
2952 default:
2953 /* reject unknown messages */
2954 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2955 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2956 srb->msg_count = 1;
2957 srb->msgout_buf[0] = dcb->identify_msg;
2958 DC395x_ENABLE_MSGOUT;
2959 srb->state |= SRB_MSGOUT;
2960 /*break; */
2961 }
2962 msgin_reject(acb, srb);
2963 }
2964
2965 /* Clear counter and MsgIn state */
2966 srb->state &= ~SRB_MSGIN;
2967 acb->msg_len = 0;
2968 }
2969 *pscsi_status = PH_BUS_FREE;
2970 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2971 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2972 }
2973
2974
2975 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2976 u16 *pscsi_status)
2977 {
2978 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid);
2979 clear_fifo(acb, "msgin_phase1");
2980 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2981 if (!(srb->state & SRB_MSGIN)) {
2982 srb->state &= ~SRB_DISCONNECT;
2983 srb->state |= SRB_MSGIN;
2984 }
2985 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2986 /* SCSI command */
2987 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2988 }
2989
2990
2991 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2992 u16 *pscsi_status)
2993 {
2994 }
2995
2996
2997 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2998 u16 *pscsi_status)
2999 {
3000 }
3001
3002
3003 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3004 {
3005 struct DeviceCtlBlk *i;
3006
3007 /* set all lun device's period, offset */
3008 if (dcb->identify_msg & 0x07)
3009 return;
3010
3011 if (acb->scan_devices) {
3012 current_sync_offset = dcb->sync_offset;
3013 return;
3014 }
3015
3016 list_for_each_entry(i, &acb->dcb_list, list)
3017 if (i->target_id == dcb->target_id) {
3018 i->sync_period = dcb->sync_period;
3019 i->sync_offset = dcb->sync_offset;
3020 i->sync_mode = dcb->sync_mode;
3021 i->min_nego_period = dcb->min_nego_period;
3022 }
3023 }
3024
3025
3026 static void disconnect(struct AdapterCtlBlk *acb)
3027 {
3028 struct DeviceCtlBlk *dcb = acb->active_dcb;
3029 struct ScsiReqBlk *srb;
3030
3031 if (!dcb) {
3032 dprintkl(KERN_ERR, "disconnect: No such device\n");
3033 udelay(500);
3034 /* Suspend queue for a while */
3035 acb->scsi_host->last_reset =
3036 jiffies + HZ / 2 +
3037 HZ * acb->eeprom.delay_time;
3038 clear_fifo(acb, "disconnectEx");
3039 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3040 return;
3041 }
3042 srb = dcb->active_srb;
3043 acb->active_dcb = NULL;
3044 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid);
3045
3046 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3047 clear_fifo(acb, "disconnect");
3048 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3049 if (srb->state & SRB_UNEXPECT_RESEL) {
3050 dprintkl(KERN_ERR,
3051 "disconnect: Unexpected reselection <%02i-%i>\n",
3052 dcb->target_id, dcb->target_lun);
3053 srb->state = 0;
3054 waiting_process_next(acb);
3055 } else if (srb->state & SRB_ABORT_SENT) {
3056 dcb->flag &= ~ABORT_DEV_;
3057 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3058 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3059 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3060 waiting_process_next(acb);
3061 } else {
3062 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3063 || !(srb->
3064 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3065 /*
3066 * Selection time out
3067 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3068 */
3069 /* Unexp. Disc / Sel Timeout */
3070 if (srb->state != SRB_START_
3071 && srb->state != SRB_MSGOUT) {
3072 srb->state = SRB_READY;
3073 dprintkl(KERN_DEBUG,
3074 "disconnect: (pid#%li) Unexpected\n",
3075 srb->cmd->pid);
3076 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3077 goto disc1;
3078 } else {
3079 /* Normal selection timeout */
3080 dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
3081 "<%02i-%i> SelTO\n", srb->cmd->pid,
3082 dcb->target_id, dcb->target_lun);
3083 if (srb->retry_count++ > DC395x_MAX_RETRIES
3084 || acb->scan_devices) {
3085 srb->target_status =
3086 SCSI_STAT_SEL_TIMEOUT;
3087 goto disc1;
3088 }
3089 free_tag(dcb, srb);
3090 srb_going_to_waiting_move(dcb, srb);
3091 dprintkdbg(DBG_KG,
3092 "disconnect: (pid#%li) Retry\n",
3093 srb->cmd->pid);
3094 waiting_set_timer(acb, HZ / 20);
3095 }
3096 } else if (srb->state & SRB_DISCONNECT) {
3097 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3098 /*
3099 * SRB_DISCONNECT (This is what we expect!)
3100 */
3101 if (bval & 0x40) {
3102 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3103 " 0x%02x: ACK set! Other controllers?\n",
3104 bval);
3105 /* It could come from another initiator, therefore don't do much ! */
3106 } else
3107 waiting_process_next(acb);
3108 } else if (srb->state & SRB_COMPLETED) {
3109 disc1:
3110 /*
3111 ** SRB_COMPLETED
3112 */
3113 free_tag(dcb, srb);
3114 dcb->active_srb = NULL;
3115 srb->state = SRB_FREE;
3116 srb_done(acb, dcb, srb);
3117 }
3118 }
3119 }
3120
3121
3122 static void reselect(struct AdapterCtlBlk *acb)
3123 {
3124 struct DeviceCtlBlk *dcb = acb->active_dcb;
3125 struct ScsiReqBlk *srb = NULL;
3126 u16 rsel_tar_lun_id;
3127 u8 id, lun;
3128 u8 arblostflag = 0;
3129 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3130
3131 clear_fifo(acb, "reselect");
3132 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3133 /* Read Reselected Target ID and LUN */
3134 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3135 if (dcb) { /* Arbitration lost but Reselection win */
3136 srb = dcb->active_srb;
3137 if (!srb) {
3138 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3139 "but active_srb == NULL\n");
3140 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3141 return;
3142 }
3143 /* Why the if ? */
3144 if (!acb->scan_devices) {
3145 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
3146 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3147 srb->cmd->pid, dcb->target_id,
3148 dcb->target_lun, rsel_tar_lun_id,
3149 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3150 arblostflag = 1;
3151 /*srb->state |= SRB_DISCONNECT; */
3152
3153 srb->state = SRB_READY;
3154 free_tag(dcb, srb);
3155 srb_going_to_waiting_move(dcb, srb);
3156 waiting_set_timer(acb, HZ / 20);
3157
3158 /* return; */
3159 }
3160 }
3161 /* Read Reselected Target Id and LUN */
3162 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3163 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3164 "Got %i!\n", rsel_tar_lun_id);
3165 id = rsel_tar_lun_id & 0xff;
3166 lun = (rsel_tar_lun_id >> 8) & 7;
3167 dcb = find_dcb(acb, id, lun);
3168 if (!dcb) {
3169 dprintkl(KERN_ERR, "reselect: From non existent device "
3170 "<%02i-%i>\n", id, lun);
3171 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3172 return;
3173 }
3174 acb->active_dcb = dcb;
3175
3176 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3177 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3178 "disconnection? <%02i-%i>\n",
3179 dcb->target_id, dcb->target_lun);
3180
3181 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3182 srb = acb->tmp_srb;
3183 dcb->active_srb = srb;
3184 } else {
3185 /* There can be only one! */
3186 srb = dcb->active_srb;
3187 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3188 /*
3189 * abort command
3190 */
3191 dprintkl(KERN_DEBUG,
3192 "reselect: w/o disconnected cmds <%02i-%i>\n",
3193 dcb->target_id, dcb->target_lun);
3194 srb = acb->tmp_srb;
3195 srb->state = SRB_UNEXPECT_RESEL;
3196 dcb->active_srb = srb;
3197 enable_msgout_abort(acb, srb);
3198 } else {
3199 if (dcb->flag & ABORT_DEV_) {
3200 /*srb->state = SRB_ABORT_SENT; */
3201 enable_msgout_abort(acb, srb);
3202 } else
3203 srb->state = SRB_DATA_XFER;
3204
3205 }
3206 }
3207 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3208
3209 /* Program HA ID, target ID, period and offset */
3210 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3211 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3212 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3213 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3214 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3215 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3216 /* SCSI command */
3217 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3218 }
3219
3220
3221 static inline u8 tagq_blacklist(char *name)
3222 {
3223 #ifndef DC395x_NO_TAGQ
3224 #if 0
3225 u8 i;
3226 for (i = 0; i < BADDEVCNT; i++)
3227 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3228 return 1;
3229 #endif
3230 return 0;
3231 #else
3232 return 1;
3233 #endif
3234 }
3235
3236
3237 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3238 {
3239 /* Check for SCSI format (ANSI and Response data format) */
3240 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3241 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3242 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3243 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3244 /* ((dcb->dev_type == TYPE_DISK)
3245 || (dcb->dev_type == TYPE_MOD)) && */
3246 !tagq_blacklist(((char *)ptr) + 8)) {
3247 if (dcb->max_command == 1)
3248 dcb->max_command =
3249 dcb->acb->tag_max_num;
3250 dcb->sync_mode |= EN_TAG_QUEUEING;
3251 /*dcb->tag_mask = 0; */
3252 } else
3253 dcb->max_command = 1;
3254 }
3255 }
3256
3257
3258 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3259 struct ScsiInqData *ptr)
3260 {
3261 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3262 dcb->dev_type = bval1;
3263 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3264 disc_tagq_set(dcb, ptr);
3265 }
3266
3267
3268 /* unmap mapped pci regions from SRB */
3269 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3270 {
3271 struct scsi_cmnd *cmd = srb->cmd;
3272 enum dma_data_direction dir = cmd->sc_data_direction;
3273
3274 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3275 /* unmap DC395x SG list */
3276 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3277 srb->sg_bus_addr, SEGMENTX_LEN);
3278 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3279 SEGMENTX_LEN,
3280 PCI_DMA_TODEVICE);
3281 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3282 scsi_sg_count(cmd), scsi_bufflen(cmd));
3283 /* unmap the sg segments */
3284 scsi_dma_unmap(cmd);
3285 }
3286 }
3287
3288
3289 /* unmap mapped pci sense buffer from SRB */
3290 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3291 struct ScsiReqBlk *srb)
3292 {
3293 if (!(srb->flag & AUTO_REQSENSE))
3294 return;
3295 /* Unmap sense buffer */
3296 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3297 srb->segment_x[0].address);
3298 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3299 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3300 /* Restore SG stuff */
3301 srb->total_xfer_length = srb->xferred;
3302 srb->segment_x[0].address =
3303 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3304 srb->segment_x[0].length =
3305 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3306 }
3307
3308
3309 /*
3310 * Complete execution of a SCSI command
3311 * Signal completion to the generic SCSI driver
3312 */
3313 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3314 struct ScsiReqBlk *srb)
3315 {
3316 u8 tempcnt, status;
3317 struct scsi_cmnd *cmd = srb->cmd;
3318 enum dma_data_direction dir = cmd->sc_data_direction;
3319 int ckc_only = 1;
3320
3321 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid,
3322 srb->cmd->device->id, srb->cmd->device->lun);
3323 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3324 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3325 scsi_sgtalbe(cmd));
3326 status = srb->target_status;
3327 if (srb->flag & AUTO_REQSENSE) {
3328 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3329 pci_unmap_srb_sense(acb, srb);
3330 /*
3331 ** target status..........................
3332 */
3333 srb->flag &= ~AUTO_REQSENSE;
3334 srb->adapter_status = 0;
3335 srb->target_status = CHECK_CONDITION << 1;
3336 if (debug_enabled(DBG_1)) {
3337 switch (cmd->sense_buffer[2] & 0x0f) {
3338 case NOT_READY:
3339 dprintkl(KERN_DEBUG,
3340 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3341 cmd->cmnd[0], dcb->target_id,
3342 dcb->target_lun, status, acb->scan_devices);
3343 break;
3344 case UNIT_ATTENTION:
3345 dprintkl(KERN_DEBUG,
3346 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3347 cmd->cmnd[0], dcb->target_id,
3348 dcb->target_lun, status, acb->scan_devices);
3349 break;
3350 case ILLEGAL_REQUEST:
3351 dprintkl(KERN_DEBUG,
3352 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3353 cmd->cmnd[0], dcb->target_id,
3354 dcb->target_lun, status, acb->scan_devices);
3355 break;
3356 case MEDIUM_ERROR:
3357 dprintkl(KERN_DEBUG,
3358 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3359 cmd->cmnd[0], dcb->target_id,
3360 dcb->target_lun, status, acb->scan_devices);
3361 break;
3362 case HARDWARE_ERROR:
3363 dprintkl(KERN_DEBUG,
3364 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3365 cmd->cmnd[0], dcb->target_id,
3366 dcb->target_lun, status, acb->scan_devices);
3367 break;
3368 }
3369 if (cmd->sense_buffer[7] >= 6)
3370 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3371 "(0x%08x 0x%08x)\n",
3372 cmd->sense_buffer[2], cmd->sense_buffer[12],
3373 cmd->sense_buffer[13],
3374 *((unsigned int *)(cmd->sense_buffer + 3)),
3375 *((unsigned int *)(cmd->sense_buffer + 8)));
3376 else
3377 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3378 cmd->sense_buffer[2],
3379 *((unsigned int *)(cmd->sense_buffer + 3)));
3380 }
3381
3382 if (status == (CHECK_CONDITION << 1)) {
3383 cmd->result = DID_BAD_TARGET << 16;
3384 goto ckc_e;
3385 }
3386 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3387
3388 if (srb->total_xfer_length
3389 && srb->total_xfer_length >= cmd->underflow)
3390 cmd->result =
3391 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3392 srb->end_message, CHECK_CONDITION);
3393 /*SET_RES_DID(cmd->result,DID_OK) */
3394 else
3395 cmd->result =
3396 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3397 srb->end_message, CHECK_CONDITION);
3398
3399 goto ckc_e;
3400 }
3401
3402 /*************************************************************/
3403 if (status) {
3404 /*
3405 * target status..........................
3406 */
3407 if (status_byte(status) == CHECK_CONDITION) {
3408 request_sense(acb, dcb, srb);
3409 return;
3410 } else if (status_byte(status) == QUEUE_FULL) {
3411 tempcnt = (u8)list_size(&dcb->srb_going_list);
3412 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3413 dcb->target_id, dcb->target_lun, tempcnt);
3414 if (tempcnt > 1)
3415 tempcnt--;
3416 dcb->max_command = tempcnt;
3417 free_tag(dcb, srb);
3418 srb_going_to_waiting_move(dcb, srb);
3419 waiting_set_timer(acb, HZ / 20);
3420 srb->adapter_status = 0;
3421 srb->target_status = 0;
3422 return;
3423 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3424 srb->adapter_status = H_SEL_TIMEOUT;
3425 srb->target_status = 0;
3426 cmd->result = DID_NO_CONNECT << 16;
3427 } else {
3428 srb->adapter_status = 0;
3429 SET_RES_DID(cmd->result, DID_ERROR);
3430 SET_RES_MSG(cmd->result, srb->end_message);
3431 SET_RES_TARGET(cmd->result, status);
3432
3433 }
3434 } else {
3435 /*
3436 ** process initiator status..........................
3437 */
3438 status = srb->adapter_status;
3439 if (status & H_OVER_UNDER_RUN) {
3440 srb->target_status = 0;
3441 SET_RES_DID(cmd->result, DID_OK);
3442 SET_RES_MSG(cmd->result, srb->end_message);
3443 } else if (srb->status & PARITY_ERROR) {
3444 SET_RES_DID(cmd->result, DID_PARITY);
3445 SET_RES_MSG(cmd->result, srb->end_message);
3446 } else { /* No error */
3447
3448 srb->adapter_status = 0;
3449 srb->target_status = 0;
3450 SET_RES_DID(cmd->result, DID_OK);
3451 }
3452 }
3453
3454 if (dir != PCI_DMA_NONE && scsi_sg_count(cmd))
3455 pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd),
3456 scsi_sg_count(cmd), dir);
3457
3458 ckc_only = 0;
3459 /* Check Error Conditions */
3460 ckc_e:
3461
3462 if (cmd->cmnd[0] == INQUIRY) {
3463 unsigned char *base = NULL;
3464 struct ScsiInqData *ptr;
3465 unsigned long flags = 0;
3466 struct scatterlist* sg = scsi_sglist(cmd);
3467 size_t offset = 0, len = sizeof(struct ScsiInqData);
3468
3469 local_irq_save(flags);
3470 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3471 ptr = (struct ScsiInqData *)(base + offset);
3472
3473 if (!ckc_only && (cmd->result & RES_DID) == 0
3474 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3475 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3476 dcb->inquiry7 = ptr->Flags;
3477
3478 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3479 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3480 if ((cmd->result == (DID_OK << 16)
3481 || status_byte(cmd->result) &
3482 CHECK_CONDITION)) {
3483 if (!dcb->init_tcq_flag) {
3484 add_dev(acb, dcb, ptr);
3485 dcb->init_tcq_flag = 1;
3486 }
3487 }
3488
3489 scsi_kunmap_atomic_sg(base);
3490 local_irq_restore(flags);
3491 }
3492
3493 /* Here is the info for Doug Gilbert's sg3 ... */
3494 scsi_set_resid(cmd, srb->total_xfer_length);
3495 /* This may be interpreted by sb. or not ... */
3496 cmd->SCp.this_residual = srb->total_xfer_length;
3497 cmd->SCp.buffers_residual = 0;
3498 if (debug_enabled(DBG_KG)) {
3499 if (srb->total_xfer_length)
3500 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
3501 "cmnd=0x%02x Missed %i bytes\n",
3502 cmd->pid, cmd->device->id, cmd->device->lun,
3503 cmd->cmnd[0], srb->total_xfer_length);
3504 }
3505
3506 srb_going_remove(dcb, srb);
3507 /* Add to free list */
3508 if (srb == acb->tmp_srb)
3509 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3510 else {
3511 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
3512 cmd->pid, cmd->result);
3513 srb_free_insert(acb, srb);
3514 }
3515 pci_unmap_srb(acb, srb);
3516
3517 cmd->scsi_done(cmd);
3518 waiting_process_next(acb);
3519 }
3520
3521
3522 /* abort all cmds in our queues */
3523 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3524 struct scsi_cmnd *cmd, u8 force)
3525 {
3526 struct DeviceCtlBlk *dcb;
3527 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3528
3529 list_for_each_entry(dcb, &acb->dcb_list, list) {
3530 struct ScsiReqBlk *srb;
3531 struct ScsiReqBlk *tmp;
3532 struct scsi_cmnd *p;
3533
3534 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3535 enum dma_data_direction dir;
3536 int result;
3537
3538 p = srb->cmd;
3539 dir = p->sc_data_direction;
3540 result = MK_RES(0, did_flag, 0, 0);
3541 printk("G:%li(%02i-%i) ", p->pid,
3542 p->device->id, p->device->lun);
3543 srb_going_remove(dcb, srb);
3544 free_tag(dcb, srb);
3545 srb_free_insert(acb, srb);
3546 p->result = result;
3547 pci_unmap_srb_sense(acb, srb);
3548 pci_unmap_srb(acb, srb);
3549 if (force) {
3550 /* For new EH, we normally don't need to give commands back,
3551 * as they all complete or all time out */
3552 p->scsi_done(p);
3553 }
3554 }
3555 if (!list_empty(&dcb->srb_going_list))
3556 dprintkl(KERN_DEBUG,
3557 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3558 dcb->target_id, dcb->target_lun);
3559 if (dcb->tag_mask)
3560 dprintkl(KERN_DEBUG,
3561 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3562 dcb->target_id, dcb->target_lun,
3563 dcb->tag_mask);
3564
3565 /* Waiting queue */
3566 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3567 int result;
3568 p = srb->cmd;
3569
3570 result = MK_RES(0, did_flag, 0, 0);
3571 printk("W:%li<%02i-%i>", p->pid, p->device->id,
3572 p->device->lun);
3573 srb_waiting_remove(dcb, srb);
3574 srb_free_insert(acb, srb);
3575 p->result = result;
3576 pci_unmap_srb_sense(acb, srb);
3577 pci_unmap_srb(acb, srb);
3578 if (force) {
3579 /* For new EH, we normally don't need to give commands back,
3580 * as they all complete or all time out */
3581 cmd->scsi_done(cmd);
3582 }
3583 }
3584 if (!list_empty(&dcb->srb_waiting_list))
3585 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3586 list_size(&dcb->srb_waiting_list), dcb->target_id,
3587 dcb->target_lun);
3588 dcb->flag &= ~ABORT_DEV_;
3589 }
3590 printk("\n");
3591 }
3592
3593
3594 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3595 {
3596 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3597 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3598 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3599
3600 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3601 /* nothing */;
3602 }
3603
3604
3605 static void set_basic_config(struct AdapterCtlBlk *acb)
3606 {
3607 u8 bval;
3608 u16 wval;
3609 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3610 if (acb->config & HCC_PARITY)
3611 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3612 else
3613 bval = PHASELATCH | INITIATOR | BLOCKRST;
3614
3615 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3616
3617 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3618 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3619 /* program Host ID */
3620 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3621 /* set ansynchronous transfer */
3622 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3623 /* Turn LED control off */
3624 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3625 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3626 /* DMA config */
3627 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3628 wval |=
3629 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3630 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3631 /* Clear pending interrupt status */
3632 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3633 /* Enable SCSI interrupt */
3634 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3635 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3636 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3637 );
3638 }
3639
3640
3641 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3642 {
3643 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3644 /* delay half a second */
3645 if (timer_pending(&acb->waiting_timer))
3646 del_timer(&acb->waiting_timer);
3647
3648 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3649 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3650 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3651 udelay(500);
3652 /* Maybe we locked up the bus? Then lets wait even longer ... */
3653 acb->scsi_host->last_reset =
3654 jiffies + 5 * HZ / 2 +
3655 HZ * acb->eeprom.delay_time;
3656
3657 clear_fifo(acb, "scsi_reset_detect");
3658 set_basic_config(acb);
3659 /*1.25 */
3660 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3661
3662 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3663 acb->acb_flag |= RESET_DONE;
3664 } else {
3665 acb->acb_flag |= RESET_DETECT;
3666 reset_dev_param(acb);
3667 doing_srb_done(acb, DID_RESET, NULL, 1);
3668 /*DC395x_RecoverSRB( acb ); */
3669 acb->active_dcb = NULL;
3670 acb->acb_flag = 0;
3671 waiting_process_next(acb);
3672 }
3673 }
3674
3675
3676 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3677 struct ScsiReqBlk *srb)
3678 {
3679 struct scsi_cmnd *cmd = srb->cmd;
3680 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
3681 cmd->pid, cmd->device->id, cmd->device->lun);
3682
3683 srb->flag |= AUTO_REQSENSE;
3684 srb->adapter_status = 0;
3685 srb->target_status = 0;
3686
3687 /* KG: Can this prevent crap sense data ? */
3688 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
3689
3690 /* Save some data */
3691 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3692 srb->segment_x[0].address;
3693 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3694 srb->segment_x[0].length;
3695 srb->xferred = srb->total_xfer_length;
3696 /* srb->segment_x : a one entry of S/G list table */
3697 srb->total_xfer_length = sizeof(cmd->sense_buffer);
3698 srb->segment_x[0].length = sizeof(cmd->sense_buffer);
3699 /* Map sense buffer */
3700 srb->segment_x[0].address =
3701 pci_map_single(acb->dev, cmd->sense_buffer,
3702 sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE);
3703 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3704 cmd->sense_buffer, srb->segment_x[0].address,
3705 sizeof(cmd->sense_buffer));
3706 srb->sg_count = 1;
3707 srb->sg_index = 0;
3708
3709 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3710 dprintkl(KERN_DEBUG,
3711 "request_sense: (pid#%li) failed <%02i-%i>\n",
3712 srb->cmd->pid, dcb->target_id, dcb->target_lun);
3713 srb_going_to_waiting_move(dcb, srb);
3714 waiting_set_timer(acb, HZ / 100);
3715 }
3716 }
3717
3718
3719 /**
3720 * device_alloc - Allocate a new device instance. This create the
3721 * devices instance and sets up all the data items. The adapter
3722 * instance is required to obtain confiuration information for this
3723 * device. This does *not* add this device to the adapters device
3724 * list.
3725 *
3726 * @acb: The adapter to obtain configuration information from.
3727 * @target: The target for the new device.
3728 * @lun: The lun for the new device.
3729 *
3730 * Return the new device if successful or NULL on failure.
3731 **/
3732 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3733 u8 target, u8 lun)
3734 {
3735 struct NvRamType *eeprom = &acb->eeprom;
3736 u8 period_index = eeprom->target[target].period & 0x07;
3737 struct DeviceCtlBlk *dcb;
3738
3739 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3740 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3741 if (!dcb)
3742 return NULL;
3743 dcb->acb = NULL;
3744 INIT_LIST_HEAD(&dcb->srb_going_list);
3745 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3746 dcb->active_srb = NULL;
3747 dcb->tag_mask = 0;
3748 dcb->max_command = 1;
3749 dcb->target_id = target;
3750 dcb->target_lun = lun;
3751 #ifndef DC395x_NO_DISCONNECT
3752 dcb->identify_msg =
3753 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3754 #else
3755 dcb->identify_msg = IDENTIFY(0, lun);
3756 #endif
3757 dcb->dev_mode = eeprom->target[target].cfg0;
3758 dcb->inquiry7 = 0;
3759 dcb->sync_mode = 0;
3760 dcb->min_nego_period = clock_period[period_index];
3761 dcb->sync_period = 0;
3762 dcb->sync_offset = 0;
3763 dcb->flag = 0;
3764
3765 #ifndef DC395x_NO_WIDE
3766 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3767 && (acb->config & HCC_WIDE_CARD))
3768 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3769 #endif
3770 #ifndef DC395x_NO_SYNC
3771 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3772 if (!(lun) || current_sync_offset)
3773 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3774 #endif
3775 if (dcb->target_lun != 0) {
3776 /* Copy settings */
3777 struct DeviceCtlBlk *p;
3778 list_for_each_entry(p, &acb->dcb_list, list)
3779 if (p->target_id == dcb->target_id)
3780 break;
3781 dprintkdbg(DBG_1,
3782 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3783 dcb->target_id, dcb->target_lun,
3784 p->target_id, p->target_lun);
3785 dcb->sync_mode = p->sync_mode;
3786 dcb->sync_period = p->sync_period;
3787 dcb->min_nego_period = p->min_nego_period;
3788 dcb->sync_offset = p->sync_offset;
3789 dcb->inquiry7 = p->inquiry7;
3790 }
3791 return dcb;
3792 }
3793
3794
3795 /**
3796 * adapter_add_device - Adds the device instance to the adaptor instance.
3797 *
3798 * @acb: The adapter device to be updated
3799 * @dcb: A newly created and intialised device instance to add.
3800 **/
3801 static void adapter_add_device(struct AdapterCtlBlk *acb,
3802 struct DeviceCtlBlk *dcb)
3803 {
3804 /* backpointer to adapter */
3805 dcb->acb = acb;
3806
3807 /* set run_robin to this device if it is currently empty */
3808 if (list_empty(&acb->dcb_list))
3809 acb->dcb_run_robin = dcb;
3810
3811 /* add device to list */
3812 list_add_tail(&dcb->list, &acb->dcb_list);
3813
3814 /* update device maps */
3815 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3816 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3817 }
3818
3819
3820 /**
3821 * adapter_remove_device - Removes the device instance from the adaptor
3822 * instance. The device instance is not check in any way or freed by this.
3823 * The caller is expected to take care of that. This will simply remove the
3824 * device from the adapters data strcutures.
3825 *
3826 * @acb: The adapter device to be updated
3827 * @dcb: A device that has previously been added to the adapter.
3828 **/
3829 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3830 struct DeviceCtlBlk *dcb)
3831 {
3832 struct DeviceCtlBlk *i;
3833 struct DeviceCtlBlk *tmp;
3834 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3835 dcb->target_id, dcb->target_lun);
3836
3837 /* fix up any pointers to this device that we have in the adapter */
3838 if (acb->active_dcb == dcb)
3839 acb->active_dcb = NULL;
3840 if (acb->dcb_run_robin == dcb)
3841 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3842
3843 /* unlink from list */
3844 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3845 if (dcb == i) {
3846 list_del(&i->list);
3847 break;
3848 }
3849
3850 /* clear map and children */
3851 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3852 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3853 dcb->acb = NULL;
3854 }
3855
3856
3857 /**
3858 * adapter_remove_and_free_device - Removes a single device from the adapter
3859 * and then frees the device information.
3860 *
3861 * @acb: The adapter device to be updated
3862 * @dcb: A device that has previously been added to the adapter.
3863 */
3864 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3865 struct DeviceCtlBlk *dcb)
3866 {
3867 if (list_size(&dcb->srb_going_list) > 1) {
3868 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3869 "Won't remove because of %i active requests.\n",
3870 dcb->target_id, dcb->target_lun,
3871 list_size(&dcb->srb_going_list));
3872 return;
3873 }
3874 adapter_remove_device(acb, dcb);
3875 kfree(dcb);
3876 }
3877
3878
3879 /**
3880 * adapter_remove_and_free_all_devices - Removes and frees all of the
3881 * devices associated with the specified adapter.
3882 *
3883 * @acb: The adapter from which all devices should be removed.
3884 **/
3885 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3886 {
3887 struct DeviceCtlBlk *dcb;
3888 struct DeviceCtlBlk *tmp;
3889 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3890 list_size(&acb->dcb_list));
3891
3892 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3893 adapter_remove_and_free_device(acb, dcb);
3894 }
3895
3896
3897 /**
3898 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3899 * scsi device that we need to deal with. We allocate a new device and then
3900 * insert that device into the adapters device list.
3901 *
3902 * @scsi_device: The new scsi device that we need to handle.
3903 **/
3904 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3905 {
3906 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3907 struct DeviceCtlBlk *dcb;
3908
3909 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3910 if (!dcb)
3911 return -ENOMEM;
3912 adapter_add_device(acb, dcb);
3913
3914 return 0;
3915 }
3916
3917
3918 /**
3919 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3920 * device that is going away.
3921 *
3922 * @scsi_device: The new scsi device that we need to handle.
3923 **/
3924 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3925 {
3926 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3927 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3928 if (dcb)
3929 adapter_remove_and_free_device(acb, dcb);
3930 }
3931
3932
3933
3934
3935 /**
3936 * trms1040_wait_30us: wait for 30 us
3937 *
3938 * Waits for 30us (using the chip by the looks of it..)
3939 *
3940 * @io_port: base I/O address
3941 **/
3942 static void __devinit trms1040_wait_30us(unsigned long io_port)
3943 {
3944 /* ScsiPortStallExecution(30); wait 30 us */
3945 outb(5, io_port + TRM_S1040_GEN_TIMER);
3946 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3947 /* nothing */ ;
3948 }
3949
3950
3951 /**
3952 * trms1040_write_cmd - write the secified command and address to
3953 * chip
3954 *
3955 * @io_port: base I/O address
3956 * @cmd: SB + op code (command) to send
3957 * @addr: address to send
3958 **/
3959 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3960 {
3961 int i;
3962 u8 send_data;
3963
3964 /* program SB + OP code */
3965 for (i = 0; i < 3; i++, cmd <<= 1) {
3966 send_data = NVR_SELECT;
3967 if (cmd & 0x04) /* Start from bit 2 */
3968 send_data |= NVR_BITOUT;
3969
3970 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3971 trms1040_wait_30us(io_port);
3972 outb((send_data | NVR_CLOCK),
3973 io_port + TRM_S1040_GEN_NVRAM);
3974 trms1040_wait_30us(io_port);
3975 }
3976
3977 /* send address */
3978 for (i = 0; i < 7; i++, addr <<= 1) {
3979 send_data = NVR_SELECT;
3980 if (addr & 0x40) /* Start from bit 6 */
3981 send_data |= NVR_BITOUT;
3982
3983 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3984 trms1040_wait_30us(io_port);
3985 outb((send_data | NVR_CLOCK),
3986 io_port + TRM_S1040_GEN_NVRAM);
3987 trms1040_wait_30us(io_port);
3988 }
3989 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3990 trms1040_wait_30us(io_port);
3991 }
3992
3993
3994 /**
3995 * trms1040_set_data - store a single byte in the eeprom
3996 *
3997 * Called from write all to write a single byte into the SSEEPROM
3998 * Which is done one bit at a time.
3999 *
4000 * @io_port: base I/O address
4001 * @addr: offset into EEPROM
4002 * @byte: bytes to write
4003 **/
4004 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4005 {
4006 int i;
4007 u8 send_data;
4008
4009 /* Send write command & address */
4010 trms1040_write_cmd(io_port, 0x05, addr);
4011
4012 /* Write data */
4013 for (i = 0; i < 8; i++, byte <<= 1) {
4014 send_data = NVR_SELECT;
4015 if (byte & 0x80) /* Start from bit 7 */
4016 send_data |= NVR_BITOUT;
4017
4018 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4019 trms1040_wait_30us(io_port);
4020 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4021 trms1040_wait_30us(io_port);
4022 }
4023 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4024 trms1040_wait_30us(io_port);
4025
4026 /* Disable chip select */
4027 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4028 trms1040_wait_30us(io_port);
4029
4030 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4031 trms1040_wait_30us(io_port);
4032
4033 /* Wait for write ready */
4034 while (1) {
4035 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4036 trms1040_wait_30us(io_port);
4037
4038 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4039 trms1040_wait_30us(io_port);
4040
4041 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4042 break;
4043 }
4044
4045 /* Disable chip select */
4046 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4047 }
4048
4049
4050 /**
4051 * trms1040_write_all - write 128 bytes to the eeprom
4052 *
4053 * Write the supplied 128 bytes to the chips SEEPROM
4054 *
4055 * @eeprom: the data to write
4056 * @io_port: the base io port
4057 **/
4058 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4059 {
4060 u8 *b_eeprom = (u8 *)eeprom;
4061 u8 addr;
4062
4063 /* Enable SEEPROM */
4064 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4065 io_port + TRM_S1040_GEN_CONTROL);
4066
4067 /* write enable */
4068 trms1040_write_cmd(io_port, 0x04, 0xFF);
4069 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4070 trms1040_wait_30us(io_port);
4071
4072 /* write */
4073 for (addr = 0; addr < 128; addr++, b_eeprom++)
4074 trms1040_set_data(io_port, addr, *b_eeprom);
4075
4076 /* write disable */
4077 trms1040_write_cmd(io_port, 0x04, 0x00);
4078 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4079 trms1040_wait_30us(io_port);
4080
4081 /* Disable SEEPROM */
4082 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4083 io_port + TRM_S1040_GEN_CONTROL);
4084 }
4085
4086
4087 /**
4088 * trms1040_get_data - get a single byte from the eeprom
4089 *
4090 * Called from read all to read a single byte into the SSEEPROM
4091 * Which is done one bit at a time.
4092 *
4093 * @io_port: base I/O address
4094 * @addr: offset into SEEPROM
4095 *
4096 * Returns the byte read.
4097 **/
4098 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4099 {
4100 int i;
4101 u8 read_byte;
4102 u8 result = 0;
4103
4104 /* Send read command & address */
4105 trms1040_write_cmd(io_port, 0x06, addr);
4106
4107 /* read data */
4108 for (i = 0; i < 8; i++) {
4109 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4110 trms1040_wait_30us(io_port);
4111 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4112
4113 /* Get data bit while falling edge */
4114 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4115 result <<= 1;
4116 if (read_byte & NVR_BITIN)
4117 result |= 1;
4118
4119 trms1040_wait_30us(io_port);
4120 }
4121
4122 /* Disable chip select */
4123 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4124 return result;
4125 }
4126
4127
4128 /**
4129 * trms1040_read_all - read all bytes from the eeprom
4130 *
4131 * Read the 128 bytes from the SEEPROM.
4132 *
4133 * @eeprom: where to store the data
4134 * @io_port: the base io port
4135 **/
4136 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4137 {
4138 u8 *b_eeprom = (u8 *)eeprom;
4139 u8 addr;
4140
4141 /* Enable SEEPROM */
4142 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4143 io_port + TRM_S1040_GEN_CONTROL);
4144
4145 /* read details */
4146 for (addr = 0; addr < 128; addr++, b_eeprom++)
4147 *b_eeprom = trms1040_get_data(io_port, addr);
4148
4149 /* Disable SEEPROM */
4150 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4151 io_port + TRM_S1040_GEN_CONTROL);
4152 }
4153
4154
4155
4156 /**
4157 * check_eeprom - get and check contents of the eeprom
4158 *
4159 * Read seeprom 128 bytes into the memory provider in eeprom.
4160 * Checks the checksum and if it's not correct it uses a set of default
4161 * values.
4162 *
4163 * @eeprom: caller allocated strcuture to read the eeprom data into
4164 * @io_port: io port to read from
4165 **/
4166 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4167 {
4168 u16 *w_eeprom = (u16 *)eeprom;
4169 u16 w_addr;
4170 u16 cksum;
4171 u32 d_addr;
4172 u32 *d_eeprom;
4173
4174 trms1040_read_all(eeprom, io_port); /* read eeprom */
4175
4176 cksum = 0;
4177 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4178 w_addr++, w_eeprom++)
4179 cksum += *w_eeprom;
4180 if (cksum != 0x1234) {
4181 /*
4182 * Checksum is wrong.
4183 * Load a set of defaults into the eeprom buffer
4184 */
4185 dprintkl(KERN_WARNING,
4186 "EEProm checksum error: using default values and options.\n");
4187 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4188 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4189 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4190 eeprom->sub_sys_id[1] =
4191 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4192 eeprom->sub_class = 0x00;
4193 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4194 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4195 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4196 eeprom->device_id[1] =
4197 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4198 eeprom->reserved = 0x00;
4199
4200 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4201 d_addr < 16; d_addr++, d_eeprom++)
4202 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4203
4204 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4205 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4206 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4207 *d_eeprom = 0x00;
4208
4209 /* Now load defaults (maybe set by boot/module params) */
4210 set_safe_settings();
4211 fix_settings();
4212 eeprom_override(eeprom);
4213
4214 eeprom->cksum = 0x00;
4215 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4216 w_addr < 63; w_addr++, w_eeprom++)
4217 cksum += *w_eeprom;
4218
4219 *w_eeprom = 0x1234 - cksum;
4220 trms1040_write_all(eeprom, io_port);
4221 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4222 } else {
4223 set_safe_settings();
4224 eeprom_index_to_delay(eeprom);
4225 eeprom_override(eeprom);
4226 }
4227 }
4228
4229
4230 /**
4231 * print_eeprom_settings - output the eeprom settings
4232 * to the kernel log so people can see what they were.
4233 *
4234 * @eeprom: The eeprom data strucutre to show details for.
4235 **/
4236 static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4237 {
4238 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4239 eeprom->scsi_id,
4240 eeprom->target[0].period,
4241 clock_speed[eeprom->target[0].period] / 10,
4242 clock_speed[eeprom->target[0].period] % 10,
4243 eeprom->target[0].cfg0);
4244 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4245 eeprom->channel_cfg, eeprom->max_tag,
4246 1 << eeprom->max_tag, eeprom->delay_time);
4247 }
4248
4249
4250 /* Free SG tables */
4251 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4252 {
4253 int i;
4254 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4255
4256 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4257 kfree(acb->srb_array[i].segment_x);
4258 }
4259
4260
4261 /*
4262 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4263 * should never cross a page boundary */
4264 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4265 {
4266 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4267 *SEGMENTX_LEN;
4268 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4269 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4270 int srb_idx = 0;
4271 unsigned i = 0;
4272 struct SGentry *ptr;
4273
4274 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4275 acb->srb_array[i].segment_x = NULL;
4276
4277 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4278 while (pages--) {
4279 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4280 if (!ptr) {
4281 adapter_sg_tables_free(acb);
4282 return 1;
4283 }
4284 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4285 PAGE_SIZE, ptr, srb_idx);
4286 i = 0;
4287 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4288 acb->srb_array[srb_idx++].segment_x =
4289 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4290 }
4291 if (i < srbs_per_page)
4292 acb->srb.segment_x =
4293 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4294 else
4295 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4296 return 0;
4297 }
4298
4299
4300
4301 /**
4302 * adapter_print_config - print adapter connection and termination
4303 * config
4304 *
4305 * The io port in the adapter needs to have been set before calling
4306 * this function.
4307 *
4308 * @acb: The adapter to print the information for.
4309 **/
4310 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4311 {
4312 u8 bval;
4313
4314 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4315 dprintkl(KERN_INFO, "%sConnectors: ",
4316 ((bval & WIDESCSI) ? "(Wide) " : ""));
4317 if (!(bval & CON5068))
4318 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4319 if (!(bval & CON68))
4320 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4321 if (!(bval & CON50))
4322 printk("int50 ");
4323 if ((bval & (CON5068 | CON50 | CON68)) ==
4324 0 /*(CON5068 | CON50 | CON68) */ )
4325 printk(" Oops! (All 3?) ");
4326 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4327 printk(" Termination: ");
4328 if (bval & DIS_TERM)
4329 printk("Disabled\n");
4330 else {
4331 if (bval & AUTOTERM)
4332 printk("Auto ");
4333 if (bval & LOW8TERM)
4334 printk("Low ");
4335 if (bval & UP8TERM)
4336 printk("High ");
4337 printk("\n");
4338 }
4339 }
4340
4341
4342 /**
4343 * adapter_init_params - Initialize the various parameters in the
4344 * adapter structure. Note that the pointer to the scsi_host is set
4345 * early (when this instance is created) and the io_port and irq
4346 * values are set later after they have been reserved. This just gets
4347 * everything set to a good starting position.
4348 *
4349 * The eeprom structure in the adapter needs to have been set before
4350 * calling this function.
4351 *
4352 * @acb: The adapter to initialize.
4353 **/
4354 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4355 {
4356 struct NvRamType *eeprom = &acb->eeprom;
4357 int i;
4358
4359 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4360 /* NOTE: acb->io_port_base is set at port registration time */
4361 /* NOTE: acb->io_port_len is set at port registration time */
4362
4363 INIT_LIST_HEAD(&acb->dcb_list);
4364 acb->dcb_run_robin = NULL;
4365 acb->active_dcb = NULL;
4366
4367 INIT_LIST_HEAD(&acb->srb_free_list);
4368 /* temp SRB for Q tag used or abort command used */
4369 acb->tmp_srb = &acb->srb;
4370 init_timer(&acb->waiting_timer);
4371 init_timer(&acb->selto_timer);
4372
4373 acb->srb_count = DC395x_MAX_SRB_CNT;
4374
4375 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4376 /* NOTE: acb->irq_level is set at IRQ registration time */
4377
4378 acb->tag_max_num = 1 << eeprom->max_tag;
4379 if (acb->tag_max_num > 30)
4380 acb->tag_max_num = 30;
4381
4382 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4383 acb->gmode2 = eeprom->channel_cfg;
4384 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4385
4386 if (eeprom->channel_cfg & NAC_SCANLUN)
4387 acb->lun_chk = 1;
4388 acb->scan_devices = 1;
4389
4390 acb->scsi_host->this_id = eeprom->scsi_id;
4391 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4392
4393 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4394 acb->dcb_map[i] = 0;
4395
4396 acb->msg_len = 0;
4397
4398 /* link static array of srbs into the srb free list */
4399 for (i = 0; i < acb->srb_count - 1; i++)
4400 srb_free_insert(acb, &acb->srb_array[i]);
4401 }
4402
4403
4404 /**
4405 * adapter_init_host - Initialize the scsi host instance based on
4406 * values that we have already stored in the adapter instance. There's
4407 * some mention that a lot of these are deprecated, so we won't use
4408 * them (we'll use the ones in the adapter instance) but we'll fill
4409 * them in in case something else needs them.
4410 *
4411 * The eeprom structure, irq and io ports in the adapter need to have
4412 * been set before calling this function.
4413 *
4414 * @host: The scsi host instance to fill in the values for.
4415 **/
4416 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4417 {
4418 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4419 struct NvRamType *eeprom = &acb->eeprom;
4420
4421 host->max_cmd_len = 24;
4422 host->can_queue = DC395x_MAX_CMD_QUEUE;
4423 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4424 host->this_id = (int)eeprom->scsi_id;
4425 host->io_port = acb->io_port_base;
4426 host->n_io_port = acb->io_port_len;
4427 host->dma_channel = -1;
4428 host->unique_id = acb->io_port_base;
4429 host->irq = acb->irq_level;
4430 host->last_reset = jiffies;
4431
4432 host->max_id = 16;
4433 if (host->max_id - 1 == eeprom->scsi_id)
4434 host->max_id--;
4435
4436 #ifdef CONFIG_SCSI_MULTI_LUN
4437 if (eeprom->channel_cfg & NAC_SCANLUN)
4438 host->max_lun = 8;
4439 else
4440 host->max_lun = 1;
4441 #else
4442 host->max_lun = 1;
4443 #endif
4444
4445 }
4446
4447
4448 /**
4449 * adapter_init_chip - Get the chip into a know state and figure out
4450 * some of the settings that apply to this adapter.
4451 *
4452 * The io port in the adapter needs to have been set before calling
4453 * this function. The config will be configured correctly on return.
4454 *
4455 * @acb: The adapter which we are to init.
4456 **/
4457 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4458 {
4459 struct NvRamType *eeprom = &acb->eeprom;
4460
4461 /* Mask all the interrupt */
4462 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4463 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4464
4465 /* Reset SCSI module */
4466 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4467
4468 /* Reset PCI/DMA module */
4469 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4470 udelay(20);
4471
4472 /* program configuration 0 */
4473 acb->config = HCC_AUTOTERM | HCC_PARITY;
4474 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4475 acb->config |= HCC_WIDE_CARD;
4476
4477 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4478 acb->config |= HCC_SCSI_RESET;
4479
4480 if (acb->config & HCC_SCSI_RESET) {
4481 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4482 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4483
4484 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4485 /*spin_unlock_irq (&io_request_lock); */
4486 udelay(500);
4487
4488 acb->scsi_host->last_reset =
4489 jiffies + HZ / 2 +
4490 HZ * acb->eeprom.delay_time;
4491
4492 /*spin_lock_irq (&io_request_lock); */
4493 }
4494 }
4495
4496
4497 /**
4498 * init_adapter - Grab the resource for the card, setup the adapter
4499 * information, set the card into a known state, create the various
4500 * tables etc etc. This basically gets all adapter information all up
4501 * to date, intialised and gets the chip in sync with it.
4502 *
4503 * @host: This hosts adapter structure
4504 * @io_port: The base I/O port
4505 * @irq: IRQ
4506 *
4507 * Returns 0 if the initialization succeeds, any other value on
4508 * failure.
4509 **/
4510 static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4511 unsigned long io_port, u32 io_port_len, unsigned int irq)
4512 {
4513 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4514 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4515 goto failed;
4516 }
4517 /* store port base to indicate we have registered it */
4518 acb->io_port_base = io_port;
4519 acb->io_port_len = io_port_len;
4520
4521 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4522 /* release the region we just claimed */
4523 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4524 goto failed;
4525 }
4526 /* store irq to indicate we have registered it */
4527 acb->irq_level = irq;
4528
4529 /* get eeprom configuration information and command line settings etc */
4530 check_eeprom(&acb->eeprom, io_port);
4531 print_eeprom_settings(&acb->eeprom);
4532
4533 /* setup adapter control block */
4534 adapter_init_params(acb);
4535
4536 /* display card connectors/termination settings */
4537 adapter_print_config(acb);
4538
4539 if (adapter_sg_tables_alloc(acb)) {
4540 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4541 goto failed;
4542 }
4543 adapter_init_scsi_host(acb->scsi_host);
4544 adapter_init_chip(acb);
4545 set_basic_config(acb);
4546
4547 dprintkdbg(DBG_0,
4548 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4549 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4550 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4551 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4552 return 0;
4553
4554 failed:
4555 if (acb->irq_level)
4556 free_irq(acb->irq_level, acb);
4557 if (acb->io_port_base)
4558 release_region(acb->io_port_base, acb->io_port_len);
4559 adapter_sg_tables_free(acb);
4560
4561 return 1;
4562 }
4563
4564
4565 /**
4566 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4567 * stopping all operations and disabling interrupt generation on the
4568 * card.
4569 *
4570 * @acb: The adapter which we are to shutdown.
4571 **/
4572 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4573 {
4574 /* disable interrupts */
4575 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4576 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4577
4578 /* reset the scsi bus */
4579 if (acb->config & HCC_SCSI_RESET)
4580 reset_scsi_bus(acb);
4581
4582 /* clear any pending interupt state */
4583 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4584 }
4585
4586
4587
4588 /**
4589 * adapter_uninit - Shut down the chip and release any resources that
4590 * we had allocated. Once this returns the adapter should not be used
4591 * anymore.
4592 *
4593 * @acb: The adapter which we are to un-initialize.
4594 **/
4595 static void adapter_uninit(struct AdapterCtlBlk *acb)
4596 {
4597 unsigned long flags;
4598 DC395x_LOCK_IO(acb->scsi_host, flags);
4599
4600 /* remove timers */
4601 if (timer_pending(&acb->waiting_timer))
4602 del_timer(&acb->waiting_timer);
4603 if (timer_pending(&acb->selto_timer))
4604 del_timer(&acb->selto_timer);
4605
4606 adapter_uninit_chip(acb);
4607 adapter_remove_and_free_all_devices(acb);
4608 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4609
4610 if (acb->irq_level)
4611 free_irq(acb->irq_level, acb);
4612 if (acb->io_port_base)
4613 release_region(acb->io_port_base, acb->io_port_len);
4614
4615 adapter_sg_tables_free(acb);
4616 }
4617
4618
4619 #undef SPRINTF
4620 #define SPRINTF(args...) pos += sprintf(pos, args)
4621
4622 #undef YESNO
4623 #define YESNO(YN) \
4624 if (YN) SPRINTF(" Yes ");\
4625 else SPRINTF(" No ")
4626
4627 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4628 char **start, off_t offset, int length, int inout)
4629 {
4630 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4631 int spd, spd1;
4632 char *pos = buffer;
4633 struct DeviceCtlBlk *dcb;
4634 unsigned long flags;
4635 int dev;
4636
4637 if (inout) /* Has data been written to the file ? */
4638 return -EPERM;
4639
4640 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4641 SPRINTF(" Driver Version " DC395X_VERSION "\n");
4642
4643 DC395x_LOCK_IO(acb->scsi_host, flags);
4644
4645 SPRINTF("SCSI Host Nr %i, ", host->host_no);
4646 SPRINTF("DC395U/UW/F DC315/U %s\n",
4647 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4648 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4649 SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4650 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4651
4652 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4653 SPRINTF("AdapterID %i\n", host->this_id);
4654
4655 SPRINTF("tag_max_num %i", acb->tag_max_num);
4656 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4657 SPRINTF(", FilterCfg 0x%02x",
4658 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4659 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4660 /*SPRINTF("\n"); */
4661
4662 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4663 SPRINTF
4664 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4665 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4666 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4667 acb->dcb_map[6], acb->dcb_map[7]);
4668 SPRINTF
4669 (" %02x %02x %02x %02x %02x %02x %02x %02x\n",
4670 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4671 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4672 acb->dcb_map[14], acb->dcb_map[15]);
4673
4674 SPRINTF
4675 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4676
4677 dev = 0;
4678 list_for_each_entry(dcb, &acb->dcb_list, list) {
4679 int nego_period;
4680 SPRINTF("%02i %02i %02i ", dev, dcb->target_id,
4681 dcb->target_lun);
4682 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4683 YESNO(dcb->sync_offset);
4684 YESNO(dcb->sync_period & WIDE_SYNC);
4685 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4686 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4687 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4688 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4689 if (dcb->sync_offset)
4690 SPRINTF(" %03i ns ", nego_period);
4691 else
4692 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4693
4694 if (dcb->sync_offset & 0x0f) {
4695 spd = 1000 / (nego_period);
4696 spd1 = 1000 % (nego_period);
4697 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4698 SPRINTF(" %2i.%1i M %02i ", spd, spd1,
4699 (dcb->sync_offset & 0x0f));
4700 } else
4701 SPRINTF(" ");
4702
4703 /* Add more info ... */
4704 SPRINTF(" %02i\n", dcb->max_command);
4705 dev++;
4706 }
4707
4708 if (timer_pending(&acb->waiting_timer))
4709 SPRINTF("Waiting queue timer running\n");
4710 else
4711 SPRINTF("\n");
4712
4713 list_for_each_entry(dcb, &acb->dcb_list, list) {
4714 struct ScsiReqBlk *srb;
4715 if (!list_empty(&dcb->srb_waiting_list))
4716 SPRINTF("DCB (%02i-%i): Waiting: %i:",
4717 dcb->target_id, dcb->target_lun,
4718 list_size(&dcb->srb_waiting_list));
4719 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4720 SPRINTF(" %li", srb->cmd->pid);
4721 if (!list_empty(&dcb->srb_going_list))
4722 SPRINTF("\nDCB (%02i-%i): Going : %i:",
4723 dcb->target_id, dcb->target_lun,
4724 list_size(&dcb->srb_going_list));
4725 list_for_each_entry(srb, &dcb->srb_going_list, list)
4726 SPRINTF(" %li", srb->cmd->pid);
4727 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4728 SPRINTF("\n");
4729 }
4730
4731 if (debug_enabled(DBG_1)) {
4732 SPRINTF("DCB list for ACB %p:\n", acb);
4733 list_for_each_entry(dcb, &acb->dcb_list, list) {
4734 SPRINTF("%p -> ", dcb);
4735 }
4736 SPRINTF("END\n");
4737 }
4738
4739 *start = buffer + offset;
4740 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4741
4742 if (pos - buffer < offset)
4743 return 0;
4744 else if (pos - buffer - offset < length)
4745 return pos - buffer - offset;
4746 else
4747 return length;
4748 }
4749
4750
4751 static struct scsi_host_template dc395x_driver_template = {
4752 .module = THIS_MODULE,
4753 .proc_name = DC395X_NAME,
4754 .proc_info = dc395x_proc_info,
4755 .name = DC395X_BANNER " " DC395X_VERSION,
4756 .queuecommand = dc395x_queue_command,
4757 .bios_param = dc395x_bios_param,
4758 .slave_alloc = dc395x_slave_alloc,
4759 .slave_destroy = dc395x_slave_destroy,
4760 .can_queue = DC395x_MAX_CAN_QUEUE,
4761 .this_id = 7,
4762 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4763 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4764 .eh_abort_handler = dc395x_eh_abort,
4765 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4766 .unchecked_isa_dma = 0,
4767 .use_clustering = DISABLE_CLUSTERING,
4768 };
4769
4770
4771 /**
4772 * banner_display - Display banner on first instance of driver
4773 * initialized.
4774 **/
4775 static void banner_display(void)
4776 {
4777 static int banner_done = 0;
4778 if (!banner_done)
4779 {
4780 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4781 banner_done = 1;
4782 }
4783 }
4784
4785
4786 /**
4787 * dc395x_init_one - Initialise a single instance of the adapter.
4788 *
4789 * The PCI layer will call this once for each instance of the adapter
4790 * that it finds in the system. The pci_dev strcuture indicates which
4791 * instance we are being called from.
4792 *
4793 * @dev: The PCI device to intialize.
4794 * @id: Looks like a pointer to the entry in our pci device table
4795 * that was actually matched by the PCI subsystem.
4796 *
4797 * Returns 0 on success, or an error code (-ve) on failure.
4798 **/
4799 static int __devinit dc395x_init_one(struct pci_dev *dev,
4800 const struct pci_device_id *id)
4801 {
4802 struct Scsi_Host *scsi_host = NULL;
4803 struct AdapterCtlBlk *acb = NULL;
4804 unsigned long io_port_base;
4805 unsigned int io_port_len;
4806 unsigned int irq;
4807
4808 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4809 banner_display();
4810
4811 if (pci_enable_device(dev))
4812 {
4813 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4814 return -ENODEV;
4815 }
4816 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4817 io_port_len = pci_resource_len(dev, 0);
4818 irq = dev->irq;
4819 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4820
4821 /* allocate scsi host information (includes out adapter) */
4822 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4823 sizeof(struct AdapterCtlBlk));
4824 if (!scsi_host) {
4825 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4826 goto fail;
4827 }
4828 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4829 acb->scsi_host = scsi_host;
4830 acb->dev = dev;
4831
4832 /* initialise the adapter and everything we need */
4833 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4834 dprintkl(KERN_INFO, "adapter init failed\n");
4835 goto fail;
4836 }
4837
4838 pci_set_master(dev);
4839
4840 /* get the scsi mid level to scan for new devices on the bus */
4841 if (scsi_add_host(scsi_host, &dev->dev)) {
4842 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4843 goto fail;
4844 }
4845 pci_set_drvdata(dev, scsi_host);
4846 scsi_scan_host(scsi_host);
4847
4848 return 0;
4849
4850 fail:
4851 if (acb != NULL)
4852 adapter_uninit(acb);
4853 if (scsi_host != NULL)
4854 scsi_host_put(scsi_host);
4855 pci_disable_device(dev);
4856 return -ENODEV;
4857 }
4858
4859
4860 /**
4861 * dc395x_remove_one - Called to remove a single instance of the
4862 * adapter.
4863 *
4864 * @dev: The PCI device to intialize.
4865 **/
4866 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4867 {
4868 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4869 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4870
4871 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4872
4873 scsi_remove_host(scsi_host);
4874 adapter_uninit(acb);
4875 pci_disable_device(dev);
4876 scsi_host_put(scsi_host);
4877 pci_set_drvdata(dev, NULL);
4878 }
4879
4880
4881 static struct pci_device_id dc395x_pci_table[] = {
4882 {
4883 .vendor = PCI_VENDOR_ID_TEKRAM,
4884 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4885 .subvendor = PCI_ANY_ID,
4886 .subdevice = PCI_ANY_ID,
4887 },
4888 {} /* Terminating entry */
4889 };
4890 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4891
4892
4893 static struct pci_driver dc395x_driver = {
4894 .name = DC395X_NAME,
4895 .id_table = dc395x_pci_table,
4896 .probe = dc395x_init_one,
4897 .remove = __devexit_p(dc395x_remove_one),
4898 };
4899
4900
4901 /**
4902 * dc395x_module_init - Module initialization function
4903 *
4904 * Used by both module and built-in driver to initialise this driver.
4905 **/
4906 static int __init dc395x_module_init(void)
4907 {
4908 return pci_register_driver(&dc395x_driver);
4909 }
4910
4911
4912 /**
4913 * dc395x_module_exit - Module cleanup function.
4914 **/
4915 static void __exit dc395x_module_exit(void)
4916 {
4917 pci_unregister_driver(&dc395x_driver);
4918 }
4919
4920
4921 module_init(dc395x_module_init);
4922 module_exit(dc395x_module_exit);
4923
4924 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4925 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4926 MODULE_LICENSE("GPL");
WRT350N Kernel Patches