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mlx5: avoid 64-bit division in dr_icm_pool_mr_create()
[linux-2.6-block.git] / drivers / scsi / dc395x.c
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1da177e4
LT		 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>
5a0e3ad6 60#include <linux/slab.h>
1da177e4
LT		 61#include <asm/io.h>
62
63#include <scsi/scsi.h>
64#include <scsi/scsicam.h> /* needed for scsicam_bios_param */
65#include <scsi/scsi_cmnd.h>
66#include <scsi/scsi_device.h>
67#include <scsi/scsi_host.h>
68
69#include "dc395x.h"
70
71#define DC395X_NAME "dc395x"
72#define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
73#define DC395X_VERSION "v2.05, 2004/03/08"
74
75/*---------------------------------------------------------------------------
76 Features
77 ---------------------------------------------------------------------------*/
78/*
79 * Set to disable parts of the driver
80 */
81/*#define DC395x_NO_DISCONNECT*/
82/*#define DC395x_NO_TAGQ*/
83/*#define DC395x_NO_SYNC*/
84/*#define DC395x_NO_WIDE*/
85
86/*---------------------------------------------------------------------------
87 Debugging
88 ---------------------------------------------------------------------------*/
89/*
90 * Types of debugging that can be enabled and disabled
91 */
92#define DBG_KG 0x0001
93#define DBG_0 0x0002
94#define DBG_1 0x0004
95#define DBG_SG 0x0020
96#define DBG_FIFO 0x0040
97#define DBG_PIO 0x0080
98
99
100/*
101 * Set set of things to output debugging for.
102 * Undefine to remove all debugging
103 */
104/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
105/*#define DEBUG_MASK DBG_0*/
106
107
108/*
109 * Output a kernel mesage at the specified level and append the
110 * driver name and a ": " to the start of the message
111 */
112#define dprintkl(level, format, arg...) \
113 printk(level DC395X_NAME ": " format , ## arg)
114
115
116#ifdef DEBUG_MASK
117/*
118 * print a debug message - this is formated with KERN_DEBUG, then the
119 * driver name followed by a ": " and then the message is output.
120 * This also checks that the specified debug level is enabled before
121 * outputing the message
122 */
123#define dprintkdbg(type, format, arg...) \
124 do { \
125 if ((type) & (DEBUG_MASK)) \
126 dprintkl(KERN_DEBUG , format , ## arg); \
127 } while (0)
128
129/*
130 * Check if the specified type of debugging is enabled
131 */
132#define debug_enabled(type) ((DEBUG_MASK) & (type))
133
134#else
135/*
136 * No debugging. Do nothing
137 */
138#define dprintkdbg(type, format, arg...) \
139 do {} while (0)
140#define debug_enabled(type) (0)
141
142#endif
143
144
145#ifndef PCI_VENDOR_ID_TEKRAM
146#define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */
147#endif
148#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
149#define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */
150#endif
151
152
153#define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
154#define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
155
156#define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address)))
157#define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address)))
158#define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address)))
159#define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address))
160#define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))
161#define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))
162
163/* cmd->result */
164#define RES_TARGET 0x000000FF /* Target State */
165#define RES_TARGET_LNX STATUS_MASK /* Only official ... */
166#define RES_ENDMSG 0x0000FF00 /* End Message */
167#define RES_DID 0x00FF0000 /* DID_ codes */
168#define RES_DRV 0xFF000000 /* DRIVER_ codes */
169
170#define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
171#define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
172
173#define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
174#define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
175#define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
176#define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
177#define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
178
179#define TAG_NONE 255
180
181/*
182 * srb->segement_x is the hw sg list. It is always allocated as a
183 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
184 * cross a page boundy.
185 */
186#define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
b4b08e58 187
1da177e4
LT		 188
189struct SGentry {
190 u32 address; /* bus! address */
191 u32 length;
192};
193
194/* The SEEPROM structure for TRM_S1040 */
195struct NVRamTarget {
196 u8 cfg0; /* Target configuration byte 0 */
197 u8 period; /* Target period */
198 u8 cfg2; /* Target configuration byte 2 */
199 u8 cfg3; /* Target configuration byte 3 */
200};
201
202struct NvRamType {
203 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */
204 u8 sub_sys_id[2]; /* 2,3 Sub System ID */
205 u8 sub_class; /* 4 Sub Class */
206 u8 vendor_id[2]; /* 5,6 Vendor ID */
207 u8 device_id[2]; /* 7,8 Device ID */
208 u8 reserved; /* 9 Reserved */
209 struct NVRamTarget target[DC395x_MAX_SCSI_ID];
210 /** 10,11,12,13
211 ** 14,15,16,17
212 ** ....
213 ** ....
214 ** 70,71,72,73
215 */
216 u8 scsi_id; /* 74 Host Adapter SCSI ID */
217 u8 channel_cfg; /* 75 Channel configuration */
218 u8 delay_time; /* 76 Power on delay time */
219 u8 max_tag; /* 77 Maximum tags */
220 u8 reserved0; /* 78 */
221 u8 boot_target; /* 79 */
222 u8 boot_lun; /* 80 */
223 u8 reserved1; /* 81 */
224 u16 reserved2[22]; /* 82,..125 */
225 u16 cksum; /* 126,127 */
226};
227
228struct ScsiReqBlk {
229 struct list_head list; /* next/prev ptrs for srb lists */
230 struct DeviceCtlBlk *dcb;
231 struct scsi_cmnd *cmd;
232
233 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */
cdb8c2a6 234 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */
1da177e4
LT		 235
236 u8 sg_count; /* No of HW sg entries for this request */
237 u8 sg_index; /* Index of HW sg entry for this request */
25985edc 238 size_t total_xfer_length; /* Total number of bytes remaining to be transferred */
cdb8c2a6 239 size_t request_length; /* Total number of bytes in this request */
1da177e4
LT		 240 /*
241 * The sense buffer handling function, request_sense, uses
242 * the first hw sg entry (segment_x[0]) and the transfer
243 * length (total_xfer_length). While doing this it stores the
244 * original values into the last sg hw list
245 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
246 * total_xfer_length in xferred. These values are restored in
247 * pci_unmap_srb_sense. This is the only place xferred is used.
248 */
cdb8c2a6 249 size_t xferred; /* Saved copy of total_xfer_length */
1da177e4
LT		 250
251 u16 state;
252
253 u8 msgin_buf[6];
254 u8 msgout_buf[6];
255
256 u8 adapter_status;
257 u8 target_status;
258 u8 msg_count;
259 u8 end_message;
260
261 u8 tag_number;
262 u8 status;
263 u8 retry_count;
264 u8 flag;
265
266 u8 scsi_phase;
267};
268
269struct DeviceCtlBlk {
270 struct list_head list; /* next/prev ptrs for the dcb list */
271 struct AdapterCtlBlk *acb;
272 struct list_head srb_going_list; /* head of going srb list */
273 struct list_head srb_waiting_list; /* head of waiting srb list */
274
275 struct ScsiReqBlk *active_srb;
276 u32 tag_mask;
277
278 u16 max_command;
279
280 u8 target_id; /* SCSI Target ID (SCSI Only) */
281 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */
282 u8 identify_msg;
283 u8 dev_mode;
284
285 u8 inquiry7; /* To store Inquiry flags */
286 u8 sync_mode; /* 0:async mode */
287 u8 min_nego_period; /* for nego. */
288 u8 sync_period; /* for reg. */
289
290 u8 sync_offset; /* for reg. and nego.(low nibble) */
291 u8 flag;
292 u8 dev_type;
293 u8 init_tcq_flag;
294};
295
296struct AdapterCtlBlk {
297 struct Scsi_Host *scsi_host;
298
299 unsigned long io_port_base;
300 unsigned long io_port_len;
301
302 struct list_head dcb_list; /* head of going dcb list */
303 struct DeviceCtlBlk *dcb_run_robin;
304 struct DeviceCtlBlk *active_dcb;
305
306 struct list_head srb_free_list; /* head of free srb list */
307 struct ScsiReqBlk *tmp_srb;
308 struct timer_list waiting_timer;
309 struct timer_list selto_timer;
310
53a8936c
HR		 311 unsigned long last_reset;
312
1da177e4
LT		 313 u16 srb_count;
314
315 u8 sel_timeout;
316
317 unsigned int irq_level;
318 u8 tag_max_num;
319 u8 acb_flag;
320 u8 gmode2;
321
322 u8 config;
323 u8 lun_chk;
324 u8 scan_devices;
325 u8 hostid_bit;
326
327 u8 dcb_map[DC395x_MAX_SCSI_ID];
328 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
329
330 struct pci_dev *dev;
331
332 u8 msg_len;
333
334 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
335 struct ScsiReqBlk srb;
336
337 struct NvRamType eeprom; /* eeprom settings for this adapter */
338};
339
340
341/*---------------------------------------------------------------------------
342 Forward declarations
343 ---------------------------------------------------------------------------*/
344static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
345 u16 *pscsi_status);
346static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
347 u16 *pscsi_status);
348static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
349 u16 *pscsi_status);
350static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
351 u16 *pscsi_status);
352static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
353 u16 *pscsi_status);
354static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
355 u16 *pscsi_status);
356static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
357 u16 *pscsi_status);
358static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
359 u16 *pscsi_status);
360static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
361 u16 *pscsi_status);
362static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
363 u16 *pscsi_status);
364static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
365 u16 *pscsi_status);
366static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
367 u16 *pscsi_status);
368static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
369 u16 *pscsi_status);
370static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
371 u16 *pscsi_status);
372static void set_basic_config(struct AdapterCtlBlk *acb);
373static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
374 struct ScsiReqBlk *srb);
375static void reset_scsi_bus(struct AdapterCtlBlk *acb);
376static void data_io_transfer(struct AdapterCtlBlk *acb,
377 struct ScsiReqBlk *srb, u16 io_dir);
378static void disconnect(struct AdapterCtlBlk *acb);
379static void reselect(struct AdapterCtlBlk *acb);
380static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
381 struct ScsiReqBlk *srb);
382static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
383 struct ScsiReqBlk *srb);
384static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
385 struct ScsiReqBlk *srb);
386static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
387 struct scsi_cmnd *cmd, u8 force);
388static void scsi_reset_detect(struct AdapterCtlBlk *acb);
389static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
390static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
391 struct ScsiReqBlk *srb);
392static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
393 struct ScsiReqBlk *srb);
394static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
395 struct ScsiReqBlk *srb);
396static void set_xfer_rate(struct AdapterCtlBlk *acb,
397 struct DeviceCtlBlk *dcb);
af53b89b 398static void waiting_timeout(struct timer_list *t);
1da177e4
LT		 399
400
401/*---------------------------------------------------------------------------
402 Static Data
403 ---------------------------------------------------------------------------*/
404static u16 current_sync_offset = 0;
405
406static void *dc395x_scsi_phase0[] = {
407 data_out_phase0,/* phase:0 */
408 data_in_phase0, /* phase:1 */
409 command_phase0, /* phase:2 */
410 status_phase0, /* phase:3 */
411 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
412 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
413 msgout_phase0, /* phase:6 */
414 msgin_phase0, /* phase:7 */
415};
416
417static void *dc395x_scsi_phase1[] = {
418 data_out_phase1,/* phase:0 */
419 data_in_phase1, /* phase:1 */
420 command_phase1, /* phase:2 */
421 status_phase1, /* phase:3 */
422 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
423 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
424 msgout_phase1, /* phase:6 */
425 msgin_phase1, /* phase:7 */
426};
427
428/*
429 *Fast20: 000 50ns, 20.0 MHz
430 * 001 75ns, 13.3 MHz
431 * 010 100ns, 10.0 MHz
432 * 011 125ns, 8.0 MHz
433 * 100 150ns, 6.6 MHz
434 * 101 175ns, 5.7 MHz
435 * 110 200ns, 5.0 MHz
436 * 111 250ns, 4.0 MHz
437 *
438 *Fast40(LVDS): 000 25ns, 40.0 MHz
439 * 001 50ns, 20.0 MHz
440 * 010 75ns, 13.3 MHz
441 * 011 100ns, 10.0 MHz
442 * 100 125ns, 8.0 MHz
443 * 101 150ns, 6.6 MHz
444 * 110 175ns, 5.7 MHz
445 * 111 200ns, 5.0 MHz
446 */
447/*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
448
449/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
450static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
451static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
452
453
454/*---------------------------------------------------------------------------
455 Configuration
456 ---------------------------------------------------------------------------*/
457/*
458 * Module/boot parameters currently effect *all* instances of the
459 * card in the system.
460 */
461
462/*
463 * Command line parameters are stored in a structure below.
464 * These are the index's into the structure for the various
465 * command line options.
466 */
467#define CFG_ADAPTER_ID 0
468#define CFG_MAX_SPEED 1
469#define CFG_DEV_MODE 2
470#define CFG_ADAPTER_MODE 3
471#define CFG_TAGS 4
472#define CFG_RESET_DELAY 5
473
474#define CFG_NUM 6 /* number of configuration items */
475
476
477/*
478 * Value used to indicate that a command line override
479 * hasn't been used to modify the value.
480 */
481#define CFG_PARAM_UNSET -1
482
483
484/*
485 * Hold command line parameters.
486 */
487struct ParameterData {
488 int value; /* value of this setting */
489 int min; /* minimum value */
490 int max; /* maximum value */
491 int def; /* default value */
492 int safe; /* safe value */
493};
6f039790 494static struct ParameterData cfg_data[] = {
1da177e4
LT		 495 { /* adapter id */
496 CFG_PARAM_UNSET,
497 0,
498 15,
499 7,
500 7
501 },
502 { /* max speed */
503 CFG_PARAM_UNSET,
504 0,
505 7,
506 1, /* 13.3Mhz */
507 4, /* 6.7Hmz */
508 },
509 { /* dev mode */
510 CFG_PARAM_UNSET,
511 0,
512 0x3f,
513 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
514 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
515 NTC_DO_SEND_START,
516 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
517 },
518 { /* adapter mode */
519 CFG_PARAM_UNSET,
520 0,
521 0x2f,
c309b351 522 NAC_SCANLUN |
1da177e4
LT		 523 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
524 /*| NAC_ACTIVE_NEG*/,
525 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
526 },
527 { /* tags */
528 CFG_PARAM_UNSET,
529 0,
530 5,
531 3, /* 16 tags (??) */
532 2,
533 },
534 { /* reset delay */
535 CFG_PARAM_UNSET,
536 0,
537 180,
538 1, /* 1 second */
539 10, /* 10 seconds */
540 }
541};
542
543
544/*
59c51591 545 * Safe settings. If set to zero the BIOS/default values with
1da177e4
LT		 546 * command line overrides will be used. If set to 1 then safe and
547 * slow settings will be used.
548 */
90ab5ee9 549static bool use_safe_settings = 0;
1da177e4
LT		 550module_param_named(safe, use_safe_settings, bool, 0);
551MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
552
553
554module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
555MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
556
557module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
558MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
559
560module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
561MODULE_PARM_DESC(dev_mode, "Device mode.");
562
563module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
564MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
565
566module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
567MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
568
569module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
570MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
571
572
573/**
574 * set_safe_settings - if the use_safe_settings option is set then
575 * set all values to the safe and slow values.
576 **/
6f039790 577static void set_safe_settings(void)
1da177e4
LT		 578{
579 if (use_safe_settings)
580 {
581 int i;
582
583 dprintkl(KERN_INFO, "Using safe settings.\n");
584 for (i = 0; i < CFG_NUM; i++)
585 {
586 cfg_data[i].value = cfg_data[i].safe;
587 }
588 }
589}
590
591
592/**
593 * fix_settings - reset any boot parameters which are out of range
594 * back to the default values.
595 **/
6f039790 596static void fix_settings(void)
1da177e4
LT		 597{
598 int i;
599
600 dprintkdbg(DBG_1,
601 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
602 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
603 cfg_data[CFG_ADAPTER_ID].value,
604 cfg_data[CFG_MAX_SPEED].value,
605 cfg_data[CFG_DEV_MODE].value,
606 cfg_data[CFG_ADAPTER_MODE].value,
607 cfg_data[CFG_TAGS].value,
608 cfg_data[CFG_RESET_DELAY].value);
609 for (i = 0; i < CFG_NUM; i++)
610 {
611 if (cfg_data[i].value < cfg_data[i].min
612 || cfg_data[i].value > cfg_data[i].max)
613 cfg_data[i].value = cfg_data[i].def;
614 }
615}
616
617
618
619/*
620 * Mapping from the eeprom delay index value (index into this array)
59c51591 621 * to the number of actual seconds that the delay should be for.
1da177e4 622 */
6f039790 623static char eeprom_index_to_delay_map[] =
1da177e4
LT		 624 { 1, 3, 5, 10, 16, 30, 60, 120 };
625
626
627/**
628 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
629 * into a number of seconds.
630 *
631 * @eeprom: The eeprom structure in which we find the delay index to map.
632 **/
6f039790 633static void eeprom_index_to_delay(struct NvRamType *eeprom)
1da177e4
LT		 634{
635 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
636}
637
638
639/**
640 * delay_to_eeprom_index - Take a delay in seconds and return the
641 * closest eeprom index which will delay for at least that amount of
642 * seconds.
643 *
644 * @delay: The delay, in seconds, to find the eeprom index for.
645 **/
6f039790 646static int delay_to_eeprom_index(int delay)
1da177e4
LT		 647{
648 u8 idx = 0;
649 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
650 idx++;
651 return idx;
652}
653
654
655/**
656 * eeprom_override - Override the eeprom settings, in the provided
657 * eeprom structure, with values that have been set on the command
658 * line.
659 *
660 * @eeprom: The eeprom data to override with command line options.
661 **/
6f039790 662static void eeprom_override(struct NvRamType *eeprom)
1da177e4
LT		 663{
664 u8 id;
665
666 /* Adapter Settings */
667 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
668 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
669
670 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
671 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
672
673 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
674 eeprom->delay_time = delay_to_eeprom_index(
675 cfg_data[CFG_RESET_DELAY].value);
676
677 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
678 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
679
680 /* Device Settings */
681 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
682 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
683 eeprom->target[id].cfg0 =
684 (u8)cfg_data[CFG_DEV_MODE].value;
685
686 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
687 eeprom->target[id].period =
688 (u8)cfg_data[CFG_MAX_SPEED].value;
689
690 }
691}
692
693
694/*---------------------------------------------------------------------------
695 ---------------------------------------------------------------------------*/
696
697static unsigned int list_size(struct list_head *head)
698{
699 unsigned int count = 0;
700 struct list_head *pos;
701 list_for_each(pos, head)
702 count++;
703 return count;
704}
705
706
707static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
708 struct DeviceCtlBlk *pos)
709{
710 int use_next = 0;
711 struct DeviceCtlBlk* next = NULL;
712 struct DeviceCtlBlk* i;
713
714 if (list_empty(head))
715 return NULL;
716
717 /* find supplied dcb and then select the next one */
718 list_for_each_entry(i, head, list)
719 if (use_next) {
720 next = i;
721 break;
722 } else if (i == pos) {
723 use_next = 1;
724 }
725 /* if no next one take the head one (ie, wraparound) */
726 if (!next)
727 list_for_each_entry(i, head, list) {
728 next = i;
729 break;
730 }
731
732 return next;
733}
734
735
736static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
737{
738 if (srb->tag_number < 255) {
739 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
740 srb->tag_number = 255;
741 }
742}
743
744
745/* Find cmd in SRB list */
77933d72 746static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
1da177e4
LT		 747 struct list_head *head)
748{
749 struct ScsiReqBlk *i;
750 list_for_each_entry(i, head, list)
751 if (i->cmd == cmd)
752 return i;
753 return NULL;
754}
755
1da177e4
LT		 756/* Sets the timer to wake us up */
757static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
758{
759 if (timer_pending(&acb->waiting_timer))
760 return;
53a8936c 761 if (time_before(jiffies + to, acb->last_reset - HZ / 2))
1da177e4 762 acb->waiting_timer.expires =
53a8936c 763 acb->last_reset - HZ / 2 + 1;
1da177e4
LT		 764 else
765 acb->waiting_timer.expires = jiffies + to + 1;
766 add_timer(&acb->waiting_timer);
767}
768
769
770/* Send the next command from the waiting list to the bus */
771static void waiting_process_next(struct AdapterCtlBlk *acb)
772{
773 struct DeviceCtlBlk *start = NULL;
774 struct DeviceCtlBlk *pos;
775 struct DeviceCtlBlk *dcb;
776 struct ScsiReqBlk *srb;
777 struct list_head *dcb_list_head = &acb->dcb_list;
778
779 if (acb->active_dcb
780 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
781 return;
782
783 if (timer_pending(&acb->waiting_timer))
784 del_timer(&acb->waiting_timer);
785
786 if (list_empty(dcb_list_head))
787 return;
788
789 /*
790 * Find the starting dcb. Need to find it again in the list
791 * since the list may have changed since we set the ptr to it
792 */
793 list_for_each_entry(dcb, dcb_list_head, list)
794 if (dcb == acb->dcb_run_robin) {
795 start = dcb;
796 break;
797 }
798 if (!start) {
799 /* This can happen! */
800 start = list_entry(dcb_list_head->next, typeof(*start), list);
801 acb->dcb_run_robin = start;
802 }
803
804
805 /*
806 * Loop over the dcb, but we start somewhere (potentially) in
807 * the middle of the loop so we need to manully do this.
808 */
809 pos = start;
810 do {
811 struct list_head *waiting_list_head = &pos->srb_waiting_list;
812
813 /* Make sure, the next another device gets scheduled ... */
814 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
815 acb->dcb_run_robin);
816
817 if (list_empty(waiting_list_head) ||
818 pos->max_command <= list_size(&pos->srb_going_list)) {
819 /* move to next dcb */
820 pos = dcb_get_next(dcb_list_head, pos);
821 } else {
822 srb = list_entry(waiting_list_head->next,
823 struct ScsiReqBlk, list);
824
825 /* Try to send to the bus */
826 if (!start_scsi(acb, pos, srb))
cd29660d 827 list_move(&srb->list, &pos->srb_going_list);
1da177e4
LT		 828 else
829 waiting_set_timer(acb, HZ/50);
830 break;
831 }
832 } while (pos != start);
833}
834
835
836/* Wake up waiting queue */
af53b89b 837static void waiting_timeout(struct timer_list *t)
1da177e4
LT		 838{
839 unsigned long flags;
af53b89b 840 struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);
1da177e4
LT		 841 dprintkdbg(DBG_1,
842 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
843 DC395x_LOCK_IO(acb->scsi_host, flags);
844 waiting_process_next(acb);
845 DC395x_UNLOCK_IO(acb->scsi_host, flags);
846}
847
848
849/* Get the DCB for a given ID/LUN combination */
850static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
851{
852 return acb->children[id][lun];
853}
854
855
856/* Send SCSI Request Block (srb) to adapter (acb) */
857static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
858{
859 struct DeviceCtlBlk *dcb = srb->dcb;
860
861 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
862 acb->active_dcb ||
863 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
cd29660d 864 list_add_tail(&srb->list, &dcb->srb_waiting_list);
1da177e4
LT		 865 waiting_process_next(acb);
866 return;
867 }
868
cd29660d
CH		 869 if (!start_scsi(acb, dcb, srb)) {
870 list_add_tail(&srb->list, &dcb->srb_going_list);
871 } else {
872 list_add(&srb->list, &dcb->srb_waiting_list);
1da177e4
LT		 873 waiting_set_timer(acb, HZ / 50);
874 }
875}
876
1da177e4
LT		 877/* Prepare SRB for being sent to Device DCB w/ command *cmd */
878static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
879 struct ScsiReqBlk *srb)
880{
a862ea31 881 int nseg;
1da177e4 882 enum dma_data_direction dir = cmd->sc_data_direction;
5cd049a5
CH		 883 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
884 cmd, dcb->target_id, dcb->target_lun);
1da177e4
LT		 885
886 srb->dcb = dcb;
887 srb->cmd = cmd;
888 srb->sg_count = 0;
889 srb->total_xfer_length = 0;
890 srb->sg_bus_addr = 0;
1da177e4
LT		 891 srb->sg_index = 0;
892 srb->adapter_status = 0;
893 srb->target_status = 0;
894 srb->msg_count = 0;
895 srb->status = 0;
896 srb->flag = 0;
897 srb->state = 0;
898 srb->retry_count = 0;
899 srb->tag_number = TAG_NONE;
900 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
901 srb->end_message = 0;
902
a862ea31
FT		 903 nseg = scsi_dma_map(cmd);
904 BUG_ON(nseg < 0);
905
906 if (dir == PCI_DMA_NONE || !nseg) {
1da177e4
LT		 907 dprintkdbg(DBG_0,
908 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
a862ea31
FT		 909 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
910 srb->segment_x[0].address);
911 } else {
1da177e4 912 int i;
a862ea31
FT		 913 u32 reqlen = scsi_bufflen(cmd);
914 struct scatterlist *sg;
1da177e4 915 struct SGentry *sgp = srb->segment_x;
a862ea31
FT		 916
917 srb->sg_count = nseg;
918
1da177e4 919 dprintkdbg(DBG_0,
a862ea31
FT		 920 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
921 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
922 srb->sg_count);
1da177e4 923
a862ea31
FT		 924 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
925 u32 busaddr = (u32)sg_dma_address(sg);
926 u32 seglen = (u32)sg->length;
b4b08e58 927 sgp[i].address = busaddr;
1da177e4
LT		 928 sgp[i].length = seglen;
929 srb->total_xfer_length += seglen;
1da177e4 930 }
1da177e4
LT		 931 sgp += srb->sg_count - 1;
932
933 /*
934 * adjust last page if too big as it is allocated
935 * on even page boundaries
936 */
937 if (srb->total_xfer_length > reqlen) {
938 sgp->length -= (srb->total_xfer_length - reqlen);
939 srb->total_xfer_length = reqlen;
940 }
941
942 /* Fixup for WIDE padding - make sure length is even */
943 if (dcb->sync_period & WIDE_SYNC &&
944 srb->total_xfer_length % 2) {
945 srb->total_xfer_length++;
946 sgp->length++;
947 }
948
dfda5e21
CH		 949 srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev,
950 srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE);
1da177e4
LT		 951
952 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
953 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1da177e4 954 }
cdb8c2a6
GL		 955
956 srb->request_length = srb->total_xfer_length;
1da177e4
LT		 957}
958
959
960/**
961 * dc395x_queue_command - queue scsi command passed from the mid
962 * layer, invoke 'done' on completion
963 *
964 * @cmd: pointer to scsi command object
965 * @done: function pointer to be invoked on completion
966 *
967 * Returns 1 if the adapter (host) is busy, else returns 0. One
968 * reason for an adapter to be busy is that the number
969 * of outstanding queued commands is already equal to
970 * struct Scsi_Host::can_queue .
971 *
972 * Required: if struct Scsi_Host::can_queue is ever non-zero
973 * then this function is required.
974 *
975 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
976 * and is expected to be held on return.
977 *
978 **/
f281233d 979static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1da177e4
LT		 980{
981 struct DeviceCtlBlk *dcb;
982 struct ScsiReqBlk *srb;
983 struct AdapterCtlBlk *acb =
984 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
5cd049a5 985 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
9cb78c16 986 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
1da177e4
LT		 987
988 /* Assume BAD_TARGET; will be cleared later */
989 cmd->result = DID_BAD_TARGET << 16;
990
991 /* ignore invalid targets */
992 if (cmd->device->id >= acb->scsi_host->max_id ||
993 cmd->device->lun >= acb->scsi_host->max_lun ||
994 cmd->device->lun >31) {
995 goto complete;
996 }
997
998 /* does the specified lun on the specified device exist */
999 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1000 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
9cb78c16 1001 cmd->device->id, (u8)cmd->device->lun);
1da177e4
LT		 1002 goto complete;
1003 }
1004
1005 /* do we have a DCB for the device */
1006 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1007 if (!dcb) {
1008 /* should never happen */
1009 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
9cb78c16 1010 cmd->device->id, (u8)cmd->device->lun);
1da177e4
LT		 1011 goto complete;
1012 }
1013
1014 /* set callback and clear result in the command */
1015 cmd->scsi_done = done;
1016 cmd->result = 0;
1017
cd29660d
CH		 1018 srb = list_first_entry_or_null(&acb->srb_free_list,
1019 struct ScsiReqBlk, list);
1020 if (!srb) {
1da177e4
LT		 1021 /*
1022 * Return 1 since we are unable to queue this command at this
1023 * point in time.
1024 */
1025 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1026 return 1;
1027 }
cd29660d 1028 list_del(&srb->list);
1da177e4
LT		 1029
1030 build_srb(cmd, dcb, srb);
1031
1032 if (!list_empty(&dcb->srb_waiting_list)) {
1033 /* append to waiting queue */
cd29660d 1034 list_add_tail(&srb->list, &dcb->srb_waiting_list);
1da177e4
LT		 1035 waiting_process_next(acb);
1036 } else {
1037 /* process immediately */
1038 send_srb(acb, srb);
1039 }
5cd049a5 1040 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1da177e4
LT		 1041 return 0;
1042
1043complete:
1044 /*
1045 * Complete the command immediatey, and then return 0 to
1046 * indicate that we have handled the command. This is usually
1047 * done when the commad is for things like non existent
1048 * devices.
1049 */
1050 done(cmd);
1051 return 0;
1052}
1053
f281233d 1054static DEF_SCSI_QCMD(dc395x_queue_command)
1da177e4
LT		 1055
1056/*
1057 * Return the disk geometry for the given SCSI device.
1058 */
1059static int dc395x_bios_param(struct scsi_device *sdev,
1060 struct block_device *bdev, sector_t capacity, int *info)
1061{
1062#ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1063 int heads, sectors, cylinders;
1064 struct AdapterCtlBlk *acb;
1065 int size = capacity;
1066
1067 dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1068 acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1069 heads = 64;
1070 sectors = 32;
1071 cylinders = size / (heads * sectors);
1072
1073 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1074 heads = 255;
1075 sectors = 63;
1076 cylinders = size / (heads * sectors);
1077 }
1078 geom[0] = heads;
1079 geom[1] = sectors;
1080 geom[2] = cylinders;
1081 return 0;
1082#else
1083 return scsicam_bios_param(bdev, capacity, info);
1084#endif
1085}
1086
1087
1088static void dump_register_info(struct AdapterCtlBlk *acb,
1089 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1090{
1091 u16 pstat;
1092 struct pci_dev *dev = acb->dev;
1093 pci_read_config_word(dev, PCI_STATUS, &pstat);
1094 if (!dcb)
1095 dcb = acb->active_dcb;
1096 if (!srb && dcb)
1097 srb = dcb->active_srb;
1098 if (srb) {
1099 if (!srb->cmd)
1100 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1101 srb, srb->cmd);
1102 else
5cd049a5 1103 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1da177e4 1104 "cmnd=0x%02x <%02i-%i>\n",
5cd049a5 1105 srb, srb->cmd,
1da177e4 1106 srb->cmd->cmnd[0], srb->cmd->device->id,
9cb78c16 1107 (u8)srb->cmd->device->lun);
3c5c6658 1108 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1da177e4
LT		 1109 srb->segment_x, srb->sg_count, srb->sg_index,
1110 srb->total_xfer_length);
1111 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1112 srb->state, srb->status, srb->scsi_phase,
1113 (acb->active_dcb) ? "" : "not");
1114 }
1115 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1116 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1117 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1118 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1119 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1120 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1121 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1122 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1123 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1124 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1125 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1126 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1127 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1128 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1129 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1130 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1131 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1132 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1133 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1134 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1135 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1136 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1137 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1138 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1139 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1140 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1141 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1142 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1143 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1144 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1145 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1146 "pci{status=0x%04x}\n",
1147 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1148 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1149 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1150 pstat);
1151}
1152
1153
1154static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1155{
1156#if debug_enabled(DBG_FIFO)
1157 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1158 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1159 if (!(fifocnt & 0x40))
1160 dprintkdbg(DBG_FIFO,
1161 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1162 fifocnt & 0x3f, lines, txt);
1163#endif
1164 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1165}
1166
1167
1168static void reset_dev_param(struct AdapterCtlBlk *acb)
1169{
1170 struct DeviceCtlBlk *dcb;
1171 struct NvRamType *eeprom = &acb->eeprom;
1172 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1173
1174 list_for_each_entry(dcb, &acb->dcb_list, list) {
1175 u8 period_index;
1176
1177 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1178 dcb->sync_period = 0;
1179 dcb->sync_offset = 0;
1180
1181 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1182 period_index = eeprom->target[dcb->target_id].period & 0x07;
1183 dcb->min_nego_period = clock_period[period_index];
1184 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1185 || !(acb->config & HCC_WIDE_CARD))
1186 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1187 }
1188}
1189
1190
1191/*
1192 * perform a hard reset on the SCSI bus
1193 * @cmd - some command for this host (for fetching hooks)
1194 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1195 */
68b3aa7c 1196static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 1197{
1198 struct AdapterCtlBlk *acb =
1199 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1200 dprintkl(KERN_INFO,
5cd049a5 1201 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
9cb78c16 1202 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1da177e4
LT		 1203
1204 if (timer_pending(&acb->waiting_timer))
1205 del_timer(&acb->waiting_timer);
1206
1207 /*
1208 * disable interrupt
1209 */
1210 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1211 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1212 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1213 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1214
1215 reset_scsi_bus(acb);
1216 udelay(500);
1217
1218 /* We may be in serious trouble. Wait some seconds */
53a8936c 1219 acb->last_reset =
1da177e4
LT		 1220 jiffies + 3 * HZ / 2 +
1221 HZ * acb->eeprom.delay_time;
1222
1223 /*
1224 * re-enable interrupt
1225 */
1226 /* Clear SCSI FIFO */
1227 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1228 clear_fifo(acb, "eh_bus_reset");
1229 /* Delete pending IRQ */
1230 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1231 set_basic_config(acb);
1232
1233 reset_dev_param(acb);
1234 doing_srb_done(acb, DID_RESET, cmd, 0);
1235 acb->active_dcb = NULL;
1236 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1237 waiting_process_next(acb);
1238
1239 return SUCCESS;
1240}
1241
68b3aa7c
JG		 1242static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1243{
1244 int rc;
1245
1246 spin_lock_irq(cmd->device->host->host_lock);
1247 rc = __dc395x_eh_bus_reset(cmd);
1248 spin_unlock_irq(cmd->device->host->host_lock);
1249
1250 return rc;
1251}
1da177e4
LT		 1252
1253/*
1254 * abort an errant SCSI command
1255 * @cmd - command to be aborted
1256 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1257 */
1258static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1259{
1260 /*
1261 * Look into our command queues: If it has not been sent already,
1262 * we remove it and return success. Otherwise fail.
1263 */
1264 struct AdapterCtlBlk *acb =
1265 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1266 struct DeviceCtlBlk *dcb;
1267 struct ScsiReqBlk *srb;
5cd049a5 1268 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
9cb78c16 1269 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1da177e4
LT		 1270
1271 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1272 if (!dcb) {
1273 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1274 return FAILED;
1275 }
1276
1277 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1278 if (srb) {
cd29660d 1279 list_del(&srb->list);
1da177e4
LT		 1280 pci_unmap_srb_sense(acb, srb);
1281 pci_unmap_srb(acb, srb);
1282 free_tag(dcb, srb);
cd29660d 1283 list_add_tail(&srb->list, &acb->srb_free_list);
1da177e4
LT		 1284 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1285 cmd->result = DID_ABORT << 16;
1286 return SUCCESS;
1287 }
1288 srb = find_cmd(cmd, &dcb->srb_going_list);
1289 if (srb) {
cdb8c2a6 1290 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1da177e4
LT		 1291 /* XXX: Should abort the command here */
1292 } else {
cdb8c2a6 1293 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1da177e4
LT		 1294 }
1295 return FAILED;
1296}
1297
1298
1299/* SDTR */
1300static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1301 struct ScsiReqBlk *srb)
1302{
1303 u8 *ptr = srb->msgout_buf + srb->msg_count;
1304 if (srb->msg_count > 1) {
1305 dprintkl(KERN_INFO,
1306 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1307 srb->msg_count, srb->msgout_buf[0],
1308 srb->msgout_buf[1]);
1309 return;
1310 }
1311 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1312 dcb->sync_offset = 0;
1313 dcb->min_nego_period = 200 >> 2;
1314 } else if (dcb->sync_offset == 0)
1315 dcb->sync_offset = SYNC_NEGO_OFFSET;
1316
1317 *ptr++ = MSG_EXTENDED; /* (01h) */
1318 *ptr++ = 3; /* length */
1319 *ptr++ = EXTENDED_SDTR; /* (01h) */
1320 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1321 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1322 srb->msg_count += 5;
1323 srb->state |= SRB_DO_SYNC_NEGO;
1324}
1325
1326
1327/* WDTR */
1328static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1329 struct ScsiReqBlk *srb)
1330{
1331 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1332 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1333 u8 *ptr = srb->msgout_buf + srb->msg_count;
1334 if (srb->msg_count > 1) {
1335 dprintkl(KERN_INFO,
1336 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1337 srb->msg_count, srb->msgout_buf[0],
1338 srb->msgout_buf[1]);
1339 return;
1340 }
1341 *ptr++ = MSG_EXTENDED; /* (01h) */
1342 *ptr++ = 2; /* length */
1343 *ptr++ = EXTENDED_WDTR; /* (03h) */
1344 *ptr++ = wide;
1345 srb->msg_count += 4;
1346 srb->state |= SRB_DO_WIDE_NEGO;
1347}
1348
1349
1350#if 0
1351/* Timer to work around chip flaw: When selecting and the bus is
1352 * busy, we sometimes miss a Selection timeout IRQ */
1353void selection_timeout_missed(unsigned long ptr);
1354/* Sets the timer to wake us up */
1355static void selto_timer(struct AdapterCtlBlk *acb)
1356{
1357 if (timer_pending(&acb->selto_timer))
1358 return;
1359 acb->selto_timer.function = selection_timeout_missed;
1360 acb->selto_timer.data = (unsigned long) acb;
1361 if (time_before
53a8936c 1362 (jiffies + HZ, acb->last_reset + HZ / 2))
1da177e4 1363 acb->selto_timer.expires =
53a8936c 1364 acb->last_reset + HZ / 2 + 1;
1da177e4
LT		 1365 else
1366 acb->selto_timer.expires = jiffies + HZ + 1;
1367 add_timer(&acb->selto_timer);
1368}
1369
1370
1371void selection_timeout_missed(unsigned long ptr)
1372{
1373 unsigned long flags;
1374 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1375 struct ScsiReqBlk *srb;
1376 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1377 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1378 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1379 return;
1380 }
1381 DC395x_LOCK_IO(acb->scsi_host, flags);
1382 srb = acb->active_dcb->active_srb;
1383 disconnect(acb);
1384 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1385}
1386#endif
1387
1388
1389static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1390 struct ScsiReqBlk* srb)
1391{
1392 u16 s_stat2, return_code;
1393 u8 s_stat, scsicommand, i, identify_message;
1394 u8 *ptr;
5cd049a5
CH		 1395 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1396 dcb->target_id, dcb->target_lun, srb);
1da177e4
LT		 1397
1398 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1399
1400 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1401 s_stat2 = 0;
1402 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1403#if 1
1404 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
5cd049a5
CH		 1405 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1406 s_stat, s_stat2);
1da177e4
LT		 1407 /*
1408 * Try anyway?
1409 *
1410 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
b71a8eb0 1411 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1da177e4
LT		 1412 * (This is likely to be a bug in the hardware. Obviously, most people
1413 * only have one initiator per SCSI bus.)
1414 * Instead let this fail and have the timer make sure the command is
1415 * tried again after a short time
1416 */
1417 /*selto_timer (acb); */
1418 return 1;
1419 }
1420#endif
1421 if (acb->active_dcb) {
5cd049a5
CH		 1422 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1423 "command while another command (0x%p) is active.",
1424 srb->cmd,
1da177e4 1425 acb->active_dcb->active_srb ?
5cd049a5 1426 acb->active_dcb->active_srb->cmd : 0);
1da177e4
LT		 1427 return 1;
1428 }
1429 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
5cd049a5 1430 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1da177e4
LT		 1431 return 1;
1432 }
1433 /* Allow starting of SCSI commands half a second before we allow the mid-level
1434 * to queue them again after a reset */
53a8936c 1435 if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1da177e4
LT		 1436 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1437 return 1;
1438 }
1439
1440 /* Flush FIFO */
1441 clear_fifo(acb, "start_scsi");
1442 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1443 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1444 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1445 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1446 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1447
1448 identify_message = dcb->identify_msg;
1449 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1450 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1451 if (srb->flag & AUTO_REQSENSE)
1452 identify_message &= 0xBF;
1453
1454 if (((srb->cmd->cmnd[0] == INQUIRY)
1455 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1456 || (srb->flag & AUTO_REQSENSE))
1457 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1458 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1459 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1460 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1461 && (dcb->target_lun == 0)) {
1462 srb->msgout_buf[0] = identify_message;
1463 srb->msg_count = 1;
1464 scsicommand = SCMD_SEL_ATNSTOP;
1465 srb->state = SRB_MSGOUT;
1466#ifndef SYNC_FIRST
1467 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1468 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1469 build_wdtr(acb, dcb, srb);
1470 goto no_cmd;
1471 }
1472#endif
1473 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1474 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1475 build_sdtr(acb, dcb, srb);
1476 goto no_cmd;
1477 }
1478 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1479 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1480 build_wdtr(acb, dcb, srb);
1481 goto no_cmd;
1482 }
1483 srb->msg_count = 0;
1484 }
1485 /* Send identify message */
1486 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1487
1488 scsicommand = SCMD_SEL_ATN;
1489 srb->state = SRB_START_;
1490#ifndef DC395x_NO_TAGQ
1491 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1492 && (identify_message & 0xC0)) {
1493 /* Send Tag message */
1494 u32 tag_mask = 1;
1495 u8 tag_number = 0;
1496 while (tag_mask & dcb->tag_mask
d8187b94 1497 && tag_number < dcb->max_command) {
1da177e4
LT		 1498 tag_mask = tag_mask << 1;
1499 tag_number++;
1500 }
1501 if (tag_number >= dcb->max_command) {
5cd049a5 1502 dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1da177e4 1503 "Out of tags target=<%02i-%i>)\n",
5cd049a5 1504 srb->cmd, srb->cmd->device->id,
9cb78c16 1505 (u8)srb->cmd->device->lun);
1da177e4
LT		 1506 srb->state = SRB_READY;
1507 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1508 DO_HWRESELECT);
1509 return 1;
1510 }
1511 /* Send Tag id */
1512 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1513 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1514 dcb->tag_mask |= tag_mask;
1515 srb->tag_number = tag_number;
1516 scsicommand = SCMD_SEL_ATN3;
1517 srb->state = SRB_START_;
1518 }
1519#endif
1520/*polling:*/
1521 /* Send CDB ..command block ......... */
5cd049a5 1522 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
9cb78c16 1523 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1da177e4
LT		 1524 srb->cmd->cmnd[0], srb->tag_number);
1525 if (srb->flag & AUTO_REQSENSE) {
1526 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1527 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1528 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1529 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
b80ca4f7 1530 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1da177e4
LT		 1531 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1532 } else {
1533 ptr = (u8 *)srb->cmd->cmnd;
1534 for (i = 0; i < srb->cmd->cmd_len; i++)
1535 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1536 }
1537 no_cmd:
1538 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1539 DO_HWRESELECT | DO_DATALATCH);
1540 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1541 /*
1542 * If start_scsi return 1:
1543 * we caught an interrupt (must be reset or reselection ... )
1544 * : Let's process it first!
1545 */
5cd049a5
CH		 1546 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1547 srb->cmd, dcb->target_id, dcb->target_lun);
1da177e4
LT		 1548 srb->state = SRB_READY;
1549 free_tag(dcb, srb);
1550 srb->msg_count = 0;
1551 return_code = 1;
1552 /* This IRQ should NOT get lost, as we did not acknowledge it */
1553 } else {
1554 /*
1555 * If start_scsi returns 0:
1556 * we know that the SCSI processor is free
1557 */
1558 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1559 dcb->active_srb = srb;
1560 acb->active_dcb = dcb;
1561 return_code = 0;
1562 /* it's important for atn stop */
1563 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1564 DO_DATALATCH | DO_HWRESELECT);
1565 /* SCSI command */
1566 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1567 }
1568 return return_code;
1569}
1570
1571
1572#define DC395x_ENABLE_MSGOUT \
1573 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1574 srb->state |= SRB_MSGOUT
1575
1576
1577/* abort command */
1578static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1579 struct ScsiReqBlk *srb)
1580{
1581 srb->msgout_buf[0] = ABORT;
1582 srb->msg_count = 1;
1583 DC395x_ENABLE_MSGOUT;
1584 srb->state &= ~SRB_MSGIN;
1585 srb->state |= SRB_MSGOUT;
1586}
1587
1588
1589/**
1590 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1591 * have been triggered for this card.
1592 *
1593 * @acb: a pointer to the adpter control block
1594 * @scsi_status: the status return when we checked the card
1595 **/
1596static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1597 u16 scsi_status)
1598{
1599 struct DeviceCtlBlk *dcb;
1600 struct ScsiReqBlk *srb;
1601 u16 phase;
1602 u8 scsi_intstatus;
1603 unsigned long flags;
1604 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1605 u16 *);
1606
1607 DC395x_LOCK_IO(acb->scsi_host, flags);
1608
1609 /* This acknowledges the IRQ */
1610 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1611 if ((scsi_status & 0x2007) == 0x2002)
1612 dprintkl(KERN_DEBUG,
1613 "COP after COP completed? %04x\n", scsi_status);
1614 if (debug_enabled(DBG_KG)) {
1615 if (scsi_intstatus & INT_SELTIMEOUT)
1616 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1617 }
1618 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1619
1620 if (timer_pending(&acb->selto_timer))
1621 del_timer(&acb->selto_timer);
1622
1623 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1624 disconnect(acb); /* bus free interrupt */
1625 goto out_unlock;
1626 }
1627 if (scsi_intstatus & INT_RESELECTED) {
1628 reselect(acb);
1629 goto out_unlock;
1630 }
1631 if (scsi_intstatus & INT_SELECT) {
1632 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1633 goto out_unlock;
1634 }
1635 if (scsi_intstatus & INT_SCSIRESET) {
1636 scsi_reset_detect(acb);
1637 goto out_unlock;
1638 }
1639 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1640 dcb = acb->active_dcb;
1641 if (!dcb) {
1642 dprintkl(KERN_DEBUG,
1643 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1644 scsi_status, scsi_intstatus);
1645 goto out_unlock;
1646 }
1647 srb = dcb->active_srb;
1648 if (dcb->flag & ABORT_DEV_) {
1649 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1650 enable_msgout_abort(acb, srb);
1651 }
1652
1653 /* software sequential machine */
1654 phase = (u16)srb->scsi_phase;
1655
1656 /*
1657 * 62037 or 62137
1658 * call dc395x_scsi_phase0[]... "phase entry"
1659 * handle every phase before start transfer
1660 */
1661 /* data_out_phase0, phase:0 */
1662 /* data_in_phase0, phase:1 */
1663 /* command_phase0, phase:2 */
1664 /* status_phase0, phase:3 */
1665 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1666 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1667 /* msgout_phase0, phase:6 */
1668 /* msgin_phase0, phase:7 */
1669 dc395x_statev = dc395x_scsi_phase0[phase];
1670 dc395x_statev(acb, srb, &scsi_status);
1671
1672 /*
25985edc 1673 * if there were any exception occurred scsi_status
1da177e4
LT		 1674 * will be modify to bus free phase new scsi_status
1675 * transfer out from ... previous dc395x_statev
1676 */
1677 srb->scsi_phase = scsi_status & PHASEMASK;
1678 phase = (u16)scsi_status & PHASEMASK;
1679
1680 /*
1681 * call dc395x_scsi_phase1[]... "phase entry" handle
1682 * every phase to do transfer
1683 */
1684 /* data_out_phase1, phase:0 */
1685 /* data_in_phase1, phase:1 */
1686 /* command_phase1, phase:2 */
1687 /* status_phase1, phase:3 */
1688 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1689 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1690 /* msgout_phase1, phase:6 */
1691 /* msgin_phase1, phase:7 */
1692 dc395x_statev = dc395x_scsi_phase1[phase];
1693 dc395x_statev(acb, srb, &scsi_status);
1694 }
1695 out_unlock:
1696 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1697}
1698
1699
7d12e780 1700static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1da177e4 1701{
c7bec5ab 1702 struct AdapterCtlBlk *acb = dev_id;
1da177e4
LT		 1703 u16 scsi_status;
1704 u8 dma_status;
1705 irqreturn_t handled = IRQ_NONE;
1706
1707 /*
3a4fa0a2 1708 * Check for pending interrupt
1da177e4
LT		 1709 */
1710 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1711 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1712 if (scsi_status & SCSIINTERRUPT) {
3a4fa0a2 1713 /* interrupt pending - let's process it! */
1da177e4
LT		 1714 dc395x_handle_interrupt(acb, scsi_status);
1715 handled = IRQ_HANDLED;
1716 }
1717 else if (dma_status & 0x20) {
1718 /* Error from the DMA engine */
1719 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1720#if 0
1721 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1722 if (acb->active_dcb) {
1723 acb->active_dcb-> flag |= ABORT_DEV_;
1724 if (acb->active_dcb->active_srb)
1725 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1726 }
1727 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1728#else
1729 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1730 acb = NULL;
1731#endif
1732 handled = IRQ_HANDLED;
1733 }
1734
1735 return handled;
1736}
1737
1738
1739static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1740 u16 *pscsi_status)
1741{
5cd049a5 1742 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1da177e4
LT		 1743 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1744 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1745
1746 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1747 srb->state &= ~SRB_MSGOUT;
1748}
1749
1750
1751static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1752 u16 *pscsi_status)
1753{
1754 u16 i;
1755 u8 *ptr;
5cd049a5 1756 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1da177e4
LT		 1757
1758 clear_fifo(acb, "msgout_phase1");
1759 if (!(srb->state & SRB_MSGOUT)) {
1760 srb->state |= SRB_MSGOUT;
1761 dprintkl(KERN_DEBUG,
5cd049a5
CH		 1762 "msgout_phase1: (0x%p) Phase unexpected\n",
1763 srb->cmd); /* So what ? */
1da177e4
LT		 1764 }
1765 if (!srb->msg_count) {
5cd049a5
CH		 1766 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1767 srb->cmd);
1da177e4
LT		 1768 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1769 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1770 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1771 return;
1772 }
1773 ptr = (u8 *)srb->msgout_buf;
1774 for (i = 0; i < srb->msg_count; i++)
1775 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1776 srb->msg_count = 0;
1777 if (srb->msgout_buf[0] == MSG_ABORT)
1778 srb->state = SRB_ABORT_SENT;
1779
1780 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1781}
1782
1783
1784static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1785 u16 *pscsi_status)
1786{
5cd049a5 1787 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1da177e4
LT		 1788 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1789}
1790
1791
1792static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1793 u16 *pscsi_status)
1794{
1795 struct DeviceCtlBlk *dcb;
1796 u8 *ptr;
1797 u16 i;
5cd049a5 1798 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1da177e4
LT		 1799
1800 clear_fifo(acb, "command_phase1");
1801 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1802 if (!(srb->flag & AUTO_REQSENSE)) {
1803 ptr = (u8 *)srb->cmd->cmnd;
1804 for (i = 0; i < srb->cmd->cmd_len; i++) {
1805 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1806 ptr++;
1807 }
1808 } else {
1809 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1810 dcb = acb->active_dcb;
1811 /* target id */
1812 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1813 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1814 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
b80ca4f7 1815 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1da177e4
LT		 1816 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1817 }
1818 srb->state |= SRB_COMMAND;
1819 /* it's important for atn stop */
1820 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1821 /* SCSI command */
1822 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1823}
1824
1825
1826/*
1827 * Verify that the remaining space in the hw sg lists is the same as
1828 * the count of remaining bytes in srb->total_xfer_length
1829 */
1830static void sg_verify_length(struct ScsiReqBlk *srb)
1831{
1832 if (debug_enabled(DBG_SG)) {
1833 unsigned len = 0;
1834 unsigned idx = srb->sg_index;
1835 struct SGentry *psge = srb->segment_x + idx;
1836 for (; idx < srb->sg_count; psge++, idx++)
1837 len += psge->length;
1838 if (len != srb->total_xfer_length)
1839 dprintkdbg(DBG_SG,
1840 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1841 srb->total_xfer_length, len);
1842 }
1843}
1844
1845
1846/*
1847 * Compute the next Scatter Gather list index and adjust its length
cdb8c2a6 1848 * and address if necessary
1da177e4
LT		 1849 */
1850static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1851{
1852 u8 idx;
25985edc 1853 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1da177e4 1854 struct SGentry *psge = srb->segment_x + srb->sg_index;
1da177e4
LT		 1855
1856 dprintkdbg(DBG_0,
25985edc 1857 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1da177e4
LT		 1858 xferred, srb->total_xfer_length, left);
1859 if (xferred == 0) {
1860 /* nothing to update since we did not transfer any data */
1861 return;
1862 }
1863
1864 sg_verify_length(srb);
1865 srb->total_xfer_length = left; /* update remaining count */
1866 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1867 if (xferred >= psge->length) {
1868 /* Complete SG entries done */
1869 xferred -= psge->length;
1870 } else {
1871 /* Partial SG entry done */
dfda5e21
CH		 1872 dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev,
1873 srb->sg_bus_addr, SEGMENTX_LEN,
1874 DMA_TO_DEVICE);
1da177e4
LT		 1875 psge->length -= xferred;
1876 psge->address += xferred;
1877 srb->sg_index = idx;
dfda5e21
CH		 1878 dma_sync_single_for_device(&srb->dcb->acb->dev->dev,
1879 srb->sg_bus_addr, SEGMENTX_LEN,
1880 DMA_TO_DEVICE);
1da177e4
LT		 1881 break;
1882 }
1883 psge++;
1884 }
1885 sg_verify_length(srb);
1da177e4
LT		 1886}
1887
1888
1889/*
25985edc 1890 * We have transferred a single byte (PIO mode?) and need to update
1da177e4
LT		 1891 * the count of bytes remaining (total_xfer_length) and update the sg
1892 * entry to either point to next byte in the current sg entry, or of
1893 * already at the end to point to the start of the next sg entry
1894 */
1895static void sg_subtract_one(struct ScsiReqBlk *srb)
1896{
cdb8c2a6 1897 sg_update_list(srb, srb->total_xfer_length - 1);
1da177e4
LT		 1898}
1899
1900
1901/*
1902 * cleanup_after_transfer
1903 *
1904 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
1905 * KG: Currently called from StatusPhase1 ()
1906 * Should probably also be called from other places
1907 * Best might be to call it in DataXXPhase0, if new phase will differ
1908 */
1909static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
1910 struct ScsiReqBlk *srb)
1911{
1912 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
1913 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
1914 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1915 clear_fifo(acb, "cleanup/in");
1916 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1917 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1918 } else { /* write */
1919 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1920 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1921 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1922 clear_fifo(acb, "cleanup/out");
1923 }
1924 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1925}
1926
1927
1928/*
25985edc 1929 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
1da177e4
LT		 1930 * Seems to be needed for unknown reasons; could be a hardware bug :-(
1931 */
1932#define DC395x_LASTPIO 4
1933
1934
1935static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1936 u16 *pscsi_status)
1937{
1938 struct DeviceCtlBlk *dcb = srb->dcb;
1939 u16 scsi_status = *pscsi_status;
1940 u32 d_left_counter = 0;
5cd049a5 1941 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
9cb78c16 1942 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1da177e4
LT		 1943
1944 /*
1945 * KG: We need to drain the buffers before we draw any conclusions!
1946 * This means telling the DMA to push the rest into SCSI, telling
1947 * SCSI to push the rest to the bus.
1948 * However, the device might have been the one to stop us (phase
1949 * change), and the data in transit just needs to be accounted so
1950 * it can be retransmitted.)
1951 */
1952 /*
1953 * KG: Stop DMA engine pushing more data into the SCSI FIFO
1954 * If we need more data, the DMA SG list will be freshly set up, anyway
1955 */
1956 dprintkdbg(DBG_PIO, "data_out_phase0: "
cdb8c2a6 1957 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
1da177e4
LT		 1958 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
1959 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1960 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1961 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1962 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
1963 srb->total_xfer_length);
1964 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
1965
1966 if (!(srb->state & SRB_XFERPAD)) {
1967 if (scsi_status & PARITYERROR)
1968 srb->status |= PARITY_ERROR;
1969
1970 /*
1971 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
1972 * is the no of bytes it got from the DMA engine not the no it
1973 * transferred successfully to the device. (And the difference could
1974 * be as much as the FIFO size, I guess ...)
1975 */
1976 if (!(scsi_status & SCSIXFERDONE)) {
1977 /*
1978 * when data transfer from DMA FIFO to SCSI FIFO
1979 * if there was some data left in SCSI FIFO
1980 */
1981 d_left_counter =
1982 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
1983 0x1F);
1984 if (dcb->sync_period & WIDE_SYNC)
1985 d_left_counter <<= 1;
1986
1987 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
1988 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
1989 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
1990 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1991 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
1992 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1993 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1994 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1995 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1996 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
1997 }
1998 /*
b4b08e58 1999 * calculate all the residue data that not yet tranfered
1da177e4
LT		 2000 * SCSI transfer counter + left in SCSI FIFO data
2001 *
2002 * .....TRM_S1040_SCSI_COUNTER (24bits)
2003 * The counter always decrement by one for every SCSI byte transfer.
2004 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2005 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2006 */
2007 if (srb->total_xfer_length > DC395x_LASTPIO)
2008 d_left_counter +=
2009 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2010
2011 /* Is this a good idea? */
2012 /*clear_fifo(acb, "DOP1"); */
2013 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2014 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
a862ea31 2015 && scsi_bufflen(srb->cmd) % 2) {
1da177e4
LT		 2016 d_left_counter = 0;
2017 dprintkl(KERN_INFO,
2018 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2019 scsi_status);
2020 }
2021 /*
2022 * KG: Oops again. Same thinko as above: The SCSI might have been
2023 * faster than the DMA engine, so that it ran out of data.
2024 * In that case, we have to do just nothing!
2025 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2026 */
2027 /*
2028 * KG: This is nonsense: We have been WRITING data to the bus
2029 * If the SCSI engine has no bytes left, how should the DMA engine?
2030 */
2031 if (d_left_counter == 0) {
2032 srb->total_xfer_length = 0;
2033 } else {
2034 /*
2035 * if transfer not yet complete
2036 * there were some data residue in SCSI FIFO or
2037 * SCSI transfer counter not empty
2038 */
2039 long oldxferred =
2040 srb->total_xfer_length - d_left_counter;
2041 const int diff =
2042 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2043 sg_update_list(srb, d_left_counter);
2044 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2045 if ((srb->segment_x[srb->sg_index].length ==
a862ea31 2046 diff && scsi_sg_count(srb->cmd))
1da177e4
LT		 2047 || ((oldxferred & ~PAGE_MASK) ==
2048 (PAGE_SIZE - diff))
2049 ) {
2050 dprintkl(KERN_INFO, "data_out_phase0: "
2051 "Work around chip bug (%i)?\n", diff);
2052 d_left_counter =
2053 srb->total_xfer_length - diff;
2054 sg_update_list(srb, d_left_counter);
2055 /*srb->total_xfer_length -= diff; */
2056 /*srb->virt_addr += diff; */
2057 /*if (srb->cmd->use_sg) */
2058 /* srb->sg_index++; */
2059 }
2060 }
2061 }
2062 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2063 cleanup_after_transfer(acb, srb);
2064 }
2065}
2066
2067
2068static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2069 u16 *pscsi_status)
2070{
5cd049a5 2071 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
9cb78c16 2072 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1da177e4
LT		 2073 clear_fifo(acb, "data_out_phase1");
2074 /* do prepare before transfer when data out phase */
2075 data_io_transfer(acb, srb, XFERDATAOUT);
2076}
2077
1da177e4
LT		 2078static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2079 u16 *pscsi_status)
2080{
2081 u16 scsi_status = *pscsi_status;
cdb8c2a6 2082
5cd049a5 2083 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
9cb78c16 2084 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1da177e4
LT		 2085
2086 /*
2087 * KG: DataIn is much more tricky than DataOut. When the device is finished
2088 * and switches to another phase, the SCSI engine should be finished too.
2089 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2090 * engine and transferred to memory.
2091 * We should wait for the FIFOs to be emptied by that (is there any way to
2092 * enforce this?) and then stop the DMA engine, because it might think, that
2093 * there are more bytes to follow. Yes, the device might disconnect prior to
2094 * having all bytes transferred!
2095 * Also we should make sure that all data from the DMA engine buffer's really
2096 * made its way to the system memory! Some documentation on this would not
2097 * seem to be a bad idea, actually.
2098 */
2099 if (!(srb->state & SRB_XFERPAD)) {
cdb8c2a6
GL		 2100 u32 d_left_counter;
2101 unsigned int sc, fc;
2102
1da177e4 2103 if (scsi_status & PARITYERROR) {
5cd049a5
CH		 2104 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2105 "Parity Error\n", srb->cmd);
1da177e4
LT		 2106 srb->status |= PARITY_ERROR;
2107 }
2108 /*
2109 * KG: We should wait for the DMA FIFO to be empty ...
2110 * but: it would be better to wait first for the SCSI FIFO and then the
2111 * the DMA FIFO to become empty? How do we know, that the device not already
2112 * sent data to the FIFO in a MsgIn phase, eg.?
2113 */
2114 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2115#if 0
2116 int ctr = 6000000;
2117 dprintkl(KERN_DEBUG,
2118 "DIP0: Wait for DMA FIFO to flush ...\n");
2119 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2120 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2121 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2122 while (!
2123 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2124 0x80) && --ctr);
2125 if (ctr < 6000000 - 1)
2126 dprintkl(KERN_DEBUG
2127 "DIP0: Had to wait for DMA ...\n");
2128 if (!ctr)
2129 dprintkl(KERN_ERR,
2130 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2131 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2132#endif
2133 dprintkdbg(DBG_KG, "data_in_phase0: "
2134 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2135 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2136 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2137 }
2138 /* Now: Check remainig data: The SCSI counters should tell us ... */
cdb8c2a6
GL		 2139 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2140 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2141 d_left_counter = sc + ((fc & 0x1f)
1da177e4
LT		 2142 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2143 0));
2144 dprintkdbg(DBG_KG, "data_in_phase0: "
2145 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2146 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2147 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
cdb8c2a6 2148 fc,
1da177e4 2149 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
cdb8c2a6
GL		 2150 sc,
2151 fc,
1da177e4
LT		 2152 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2153 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2154 srb->total_xfer_length, d_left_counter);
2155#if DC395x_LASTPIO
25985edc 2156 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
1da177e4
LT		 2157 if (d_left_counter
2158 && srb->total_xfer_length <= DC395x_LASTPIO) {
cdb8c2a6
GL		 2159 size_t left_io = srb->total_xfer_length;
2160
1da177e4
LT		 2161 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2162 /*sg_update_list (srb, d_left_counter); */
cdb8c2a6
GL		 2163 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2164 "for remaining %i bytes:",
2165 fc & 0x1f,
1da177e4
LT		 2166 (srb->dcb->sync_period & WIDE_SYNC) ?
2167 "words" : "bytes",
1da177e4
LT		 2168 srb->total_xfer_length);
2169 if (srb->dcb->sync_period & WIDE_SYNC)
2170 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2171 CFG2_WIDEFIFO);
cdb8c2a6
GL		 2172 while (left_io) {
2173 unsigned char *virt, *base = NULL;
2174 unsigned long flags = 0;
2175 size_t len = left_io;
a862ea31
FT		 2176 size_t offset = srb->request_length - left_io;
2177
2178 local_irq_save(flags);
2179 /* Assumption: it's inside one page as it's at most 4 bytes and
2180 I just assume it's on a 4-byte boundary */
2181 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2182 srb->sg_count, &offset, &len);
2183 virt = base + offset;
cdb8c2a6 2184
cdb8c2a6
GL		 2185 left_io -= len;
2186
2187 while (len) {
2188 u8 byte;
2189 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2190 *virt++ = byte;
2191
1da177e4
LT		 2192 if (debug_enabled(DBG_PIO))
2193 printk(" %02x", byte);
cdb8c2a6
GL		 2194
2195 d_left_counter--;
2196 sg_subtract_one(srb);
2197
2198 len--;
2199
2200 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2201
2202 if (fc == 0x40) {
2203 left_io = 0;
2204 break;
2205 }
2206 }
2207
2208 WARN_ON((fc != 0x40) == !d_left_counter);
2209
2210 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2211 /* Read the last byte ... */
2212 if (srb->total_xfer_length > 0) {
2213 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2214
2215 *virt++ = byte;
2216 srb->total_xfer_length--;
2217 if (debug_enabled(DBG_PIO))
2218 printk(" %02x", byte);
2219 }
2220
2221 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2222 }
2223
a862ea31
FT		 2224 scsi_kunmap_atomic_sg(base);
2225 local_irq_restore(flags);
1da177e4
LT		 2226 }
2227 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2228 /*srb->total_xfer_length = 0; */
2229 if (debug_enabled(DBG_PIO))
2230 printk("\n");
2231 }
2232#endif /* DC395x_LASTPIO */
2233
2234#if 0
2235 /*
2236 * KG: This was in DATAOUT. Does it also belong here?
2237 * Nobody seems to know what counter and fifo_cnt count exactly ...
2238 */
2239 if (!(scsi_status & SCSIXFERDONE)) {
2240 /*
2241 * when data transfer from DMA FIFO to SCSI FIFO
2242 * if there was some data left in SCSI FIFO
2243 */
2244 d_left_counter =
2245 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2246 0x1F);
2247 if (srb->dcb->sync_period & WIDE_SYNC)
2248 d_left_counter <<= 1;
2249 /*
2250 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2251 * so need to *= 2
2252 * KG: Seems to be correct ...
2253 */
2254 }
2255#endif
2256 /* KG: This should not be needed any more! */
2257 if (d_left_counter == 0
2258 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2259#if 0
2260 int ctr = 6000000;
2261 u8 TempDMAstatus;
2262 do {
2263 TempDMAstatus =
2264 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2265 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2266 if (!ctr)
2267 dprintkl(KERN_ERR,
2268 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2269 srb->total_xfer_length = 0;
2270#endif
2271 srb->total_xfer_length = d_left_counter;
2272 } else { /* phase changed */
2273 /*
2274 * parsing the case:
2275 * when a transfer not yet complete
2276 * but be disconnected by target
2277 * if transfer not yet complete
2278 * there were some data residue in SCSI FIFO or
2279 * SCSI transfer counter not empty
2280 */
2281 sg_update_list(srb, d_left_counter);
2282 }
2283 }
2284 /* KG: The target may decide to disconnect: Empty FIFO before! */
2285 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2286 cleanup_after_transfer(acb, srb);
2287 }
2288}
2289
2290
2291static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2292 u16 *pscsi_status)
2293{
5cd049a5 2294 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
9cb78c16 2295 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1da177e4
LT		 2296 data_io_transfer(acb, srb, XFERDATAIN);
2297}
2298
2299
2300static void data_io_transfer(struct AdapterCtlBlk *acb,
2301 struct ScsiReqBlk *srb, u16 io_dir)
2302{
2303 struct DeviceCtlBlk *dcb = srb->dcb;
2304 u8 bval;
2305 dprintkdbg(DBG_0,
5cd049a5 2306 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
9cb78c16 2307 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1da177e4
LT		 2308 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2309 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2310 if (srb == acb->tmp_srb)
2311 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2312 if (srb->sg_index >= srb->sg_count) {
2313 /* can't happen? out of bounds error */
2314 return;
2315 }
2316
2317 if (srb->total_xfer_length > DC395x_LASTPIO) {
2318 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2319 /*
2320 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2321 * Maybe, even ABORTXFER would be appropriate
2322 */
2323 if (dma_status & XFERPENDING) {
2324 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2325 "Expect trouble!\n");
2326 dump_register_info(acb, dcb, srb);
2327 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2328 }
2329 /* clear_fifo(acb, "IO"); */
2330 /*
2331 * load what physical address of Scatter/Gather list table
2332 * want to be transfer
2333 */
2334 srb->state |= SRB_DATA_XFER;
2335 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
a862ea31 2336 if (scsi_sg_count(srb->cmd)) { /* with S/G */
1da177e4
LT		 2337 io_dir |= DMACMD_SG;
2338 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2339 srb->sg_bus_addr +
2340 sizeof(struct SGentry) *
2341 srb->sg_index);
2342 /* load how many bytes in the sg list table */
2343 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2344 ((u32)(srb->sg_count -
2345 srb->sg_index) << 3));
2346 } else { /* without S/G */
2347 io_dir &= ~DMACMD_SG;
2348 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2349 srb->segment_x[0].address);
2350 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2351 srb->segment_x[0].length);
2352 }
2353 /* load total transfer length (24bits) max value 16Mbyte */
2354 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2355 srb->total_xfer_length);
2356 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2357 if (io_dir & DMACMD_DIR) { /* read */
2358 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2359 SCMD_DMA_IN);
2360 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2361 } else {
2362 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2363 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2364 SCMD_DMA_OUT);
2365 }
2366
2367 }
2368#if DC395x_LASTPIO
2369 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2370 /*
2371 * load what physical address of Scatter/Gather list table
2372 * want to be transfer
2373 */
2374 srb->state |= SRB_DATA_XFER;
2375 /* load total transfer length (24bits) max value 16Mbyte */
2376 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2377 srb->total_xfer_length);
2378 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2379 if (io_dir & DMACMD_DIR) { /* read */
2380 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2381 SCMD_FIFO_IN);
2382 } else { /* write */
2383 int ln = srb->total_xfer_length;
cdb8c2a6
GL		 2384 size_t left_io = srb->total_xfer_length;
2385
1da177e4
LT		 2386 if (srb->dcb->sync_period & WIDE_SYNC)
2387 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2388 CFG2_WIDEFIFO);
1da177e4 2389
cdb8c2a6
GL		 2390 while (left_io) {
2391 unsigned char *virt, *base = NULL;
2392 unsigned long flags = 0;
2393 size_t len = left_io;
a862ea31
FT		 2394 size_t offset = srb->request_length - left_io;
2395
2396 local_irq_save(flags);
2397 /* Again, max 4 bytes */
2398 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2399 srb->sg_count, &offset, &len);
2400 virt = base + offset;
cdb8c2a6 2401
cdb8c2a6
GL		 2402 left_io -= len;
2403
2404 while (len--) {
2405 if (debug_enabled(DBG_PIO))
2406 printk(" %02x", *virt);
1da177e4 2407
cdb8c2a6 2408 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
1da177e4 2409
cdb8c2a6
GL		 2410 sg_subtract_one(srb);
2411 }
2412
a862ea31
FT		 2413 scsi_kunmap_atomic_sg(base);
2414 local_irq_restore(flags);
1da177e4
LT		 2415 }
2416 if (srb->dcb->sync_period & WIDE_SYNC) {
2417 if (ln % 2) {
2418 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2419 if (debug_enabled(DBG_PIO))
2420 printk(" |00");
2421 }
2422 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2423 }
2424 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2425 if (debug_enabled(DBG_PIO))
2426 printk("\n");
2427 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2428 SCMD_FIFO_OUT);
2429 }
2430 }
2431#endif /* DC395x_LASTPIO */
2432 else { /* xfer pad */
2433 u8 data = 0, data2 = 0;
2434 if (srb->sg_count) {
2435 srb->adapter_status = H_OVER_UNDER_RUN;
2436 srb->status |= OVER_RUN;
2437 }
2438 /*
2439 * KG: despite the fact that we are using 16 bits I/O ops
2440 * the SCSI FIFO is only 8 bits according to the docs
2441 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2442 */
2443 if (dcb->sync_period & WIDE_SYNC) {
2444 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2445 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2446 CFG2_WIDEFIFO);
2447 if (io_dir & DMACMD_DIR) {
2448 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2449 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2450 } else {
2451 /* Danger, Robinson: If you find KGs
2452 * scattered over the wide disk, the driver
2453 * or chip is to blame :-( */
2454 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2455 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2456 }
2457 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2458 } else {
2459 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2460 /* Danger, Robinson: If you find a collection of Ks on your disk
2461 * something broke :-( */
2462 if (io_dir & DMACMD_DIR)
2463 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2464 else
2465 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2466 }
2467 srb->state |= SRB_XFERPAD;
2468 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2469 /* SCSI command */
2470 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2471 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2472 }
2473}
2474
2475
2476static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2477 u16 *pscsi_status)
2478{
5cd049a5 2479 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
9cb78c16 2480 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1da177e4
LT		 2481 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2482 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2483 srb->state = SRB_COMPLETED;
2484 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2485 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2486 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2487}
2488
2489
2490static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2491 u16 *pscsi_status)
2492{
5cd049a5 2493 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
9cb78c16 2494 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1da177e4
LT		 2495 srb->state = SRB_STATUS;
2496 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2497 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2498}
2499
2500
2501/* Check if the message is complete */
2502static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2503{
2504 if (*msgbuf == EXTENDED_MESSAGE) {
2505 if (len < 2)
2506 return 0;
2507 if (len < msgbuf[1] + 2)
2508 return 0;
2509 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2510 if (len < 2)
2511 return 0;
2512 return 1;
2513}
2514
2515/* reject_msg */
2516static inline void msgin_reject(struct AdapterCtlBlk *acb,
2517 struct ScsiReqBlk *srb)
2518{
2519 srb->msgout_buf[0] = MESSAGE_REJECT;
2520 srb->msg_count = 1;
2521 DC395x_ENABLE_MSGOUT;
2522 srb->state &= ~SRB_MSGIN;
2523 srb->state |= SRB_MSGOUT;
2524 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2525 srb->msgin_buf[0],
2526 srb->dcb->target_id, srb->dcb->target_lun);
2527}
2528
2529
2530static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2531 struct DeviceCtlBlk *dcb, u8 tag)
2532{
2533 struct ScsiReqBlk *srb = NULL;
2534 struct ScsiReqBlk *i;
5cd049a5
CH		 2535 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2536 srb->cmd, tag, srb);
1da177e4
LT		 2537
2538 if (!(dcb->tag_mask & (1 << tag)))
2539 dprintkl(KERN_DEBUG,
2540 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2541 dcb->tag_mask, tag);
2542
2543 if (list_empty(&dcb->srb_going_list))
2544 goto mingx0;
2545 list_for_each_entry(i, &dcb->srb_going_list, list) {
2546 if (i->tag_number == tag) {
2547 srb = i;
2548 break;
2549 }
2550 }
2551 if (!srb)
2552 goto mingx0;
2553
5cd049a5
CH		 2554 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2555 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
1da177e4
LT		 2556 if (dcb->flag & ABORT_DEV_) {
2557 /*srb->state = SRB_ABORT_SENT; */
2558 enable_msgout_abort(acb, srb);
2559 }
2560
2561 if (!(srb->state & SRB_DISCONNECT))
2562 goto mingx0;
2563
2564 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2565 srb->state |= dcb->active_srb->state;
2566 srb->state |= SRB_DATA_XFER;
2567 dcb->active_srb = srb;
2568 /* How can we make the DORS happy? */
2569 return srb;
2570
2571 mingx0:
2572 srb = acb->tmp_srb;
2573 srb->state = SRB_UNEXPECT_RESEL;
2574 dcb->active_srb = srb;
2575 srb->msgout_buf[0] = MSG_ABORT_TAG;
2576 srb->msg_count = 1;
2577 DC395x_ENABLE_MSGOUT;
2578 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2579 return srb;
2580}
2581
2582
2583static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2584 struct DeviceCtlBlk *dcb)
2585{
2586 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2587 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2588 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2589 set_xfer_rate(acb, dcb);
2590}
2591
2592
2593/* set async transfer mode */
2594static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2595{
2596 struct DeviceCtlBlk *dcb = srb->dcb;
2597 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2598 dcb->target_id, dcb->target_lun);
2599
2600 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2601 dcb->sync_mode |= SYNC_NEGO_DONE;
2602 /*dcb->sync_period &= 0; */
2603 dcb->sync_offset = 0;
2604 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2605 srb->state &= ~SRB_DO_SYNC_NEGO;
2606 reprogram_regs(acb, dcb);
2607 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2608 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2609 build_wdtr(acb, dcb, srb);
2610 DC395x_ENABLE_MSGOUT;
2611 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2612 }
2613}
2614
2615
2616/* set sync transfer mode */
2617static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2618{
2619 struct DeviceCtlBlk *dcb = srb->dcb;
2620 u8 bval;
2621 int fact;
2622 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2623 "(%02i.%01i MHz) Offset %i\n",
2624 dcb->target_id, srb->msgin_buf[3] << 2,
2625 (250 / srb->msgin_buf[3]),
2626 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2627 srb->msgin_buf[4]);
2628
2629 if (srb->msgin_buf[4] > 15)
2630 srb->msgin_buf[4] = 15;
2631 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2632 dcb->sync_offset = 0;
2633 else if (dcb->sync_offset == 0)
2634 dcb->sync_offset = srb->msgin_buf[4];
2635 if (srb->msgin_buf[4] > dcb->sync_offset)
2636 srb->msgin_buf[4] = dcb->sync_offset;
2637 else
2638 dcb->sync_offset = srb->msgin_buf[4];
2639 bval = 0;
2640 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2641 || dcb->min_nego_period >
2642 clock_period[bval]))
2643 bval++;
2644 if (srb->msgin_buf[3] < clock_period[bval])
2645 dprintkl(KERN_INFO,
2646 "msgin_set_sync: Increase sync nego period to %ins\n",
2647 clock_period[bval] << 2);
2648 srb->msgin_buf[3] = clock_period[bval];
2649 dcb->sync_period &= 0xf0;
2650 dcb->sync_period |= ALT_SYNC | bval;
2651 dcb->min_nego_period = srb->msgin_buf[3];
2652
2653 if (dcb->sync_period & WIDE_SYNC)
2654 fact = 500;
2655 else
2656 fact = 250;
2657
2658 dprintkl(KERN_INFO,
2659 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2660 dcb->target_id, (fact == 500) ? "Wide16" : "",
2661 dcb->min_nego_period << 2, dcb->sync_offset,
2662 (fact / dcb->min_nego_period),
2663 ((fact % dcb->min_nego_period) * 10 +
2664 dcb->min_nego_period / 2) / dcb->min_nego_period);
2665
2666 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2667 /* Reply with corrected SDTR Message */
2668 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2669 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2670
2671 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2672 srb->msg_count = 5;
2673 DC395x_ENABLE_MSGOUT;
2674 dcb->sync_mode |= SYNC_NEGO_DONE;
2675 } else {
2676 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2677 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2678 build_wdtr(acb, dcb, srb);
2679 DC395x_ENABLE_MSGOUT;
2680 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2681 }
2682 }
2683 srb->state &= ~SRB_DO_SYNC_NEGO;
2684 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2685
2686 reprogram_regs(acb, dcb);
2687}
2688
2689
2690static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2691 struct ScsiReqBlk *srb)
2692{
2693 struct DeviceCtlBlk *dcb = srb->dcb;
2694 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2695
2696 dcb->sync_period &= ~WIDE_SYNC;
2697 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2698 dcb->sync_mode |= WIDE_NEGO_DONE;
2699 srb->state &= ~SRB_DO_WIDE_NEGO;
2700 reprogram_regs(acb, dcb);
2701 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2702 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2703 build_sdtr(acb, dcb, srb);
2704 DC395x_ENABLE_MSGOUT;
2705 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2706 }
2707}
2708
2709static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2710{
2711 struct DeviceCtlBlk *dcb = srb->dcb;
2712 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2713 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2714 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2715
2716 if (srb->msgin_buf[3] > wide)
2717 srb->msgin_buf[3] = wide;
2718 /* Completed */
2719 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2720 dprintkl(KERN_DEBUG,
2721 "msgin_set_wide: Wide nego initiated <%02i>\n",
2722 dcb->target_id);
2723 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2724 srb->msg_count = 4;
2725 srb->state |= SRB_DO_WIDE_NEGO;
2726 DC395x_ENABLE_MSGOUT;
2727 }
2728
2729 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2730 if (srb->msgin_buf[3] > 0)
2731 dcb->sync_period |= WIDE_SYNC;
2732 else
2733 dcb->sync_period &= ~WIDE_SYNC;
2734 srb->state &= ~SRB_DO_WIDE_NEGO;
2735 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2736 dprintkdbg(DBG_1,
2737 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2738 (8 << srb->msgin_buf[3]), dcb->target_id);
2739 reprogram_regs(acb, dcb);
2740 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2741 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2742 build_sdtr(acb, dcb, srb);
2743 DC395x_ENABLE_MSGOUT;
2744 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2745 }
2746}
2747
2748
2749/*
2750 * extended message codes:
2751 *
2752 * code description
2753 *
2754 * 02h Reserved
2755 * 00h MODIFY DATA POINTER
2756 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2757 * 03h WIDE DATA TRANSFER REQUEST
2758 * 04h - 7Fh Reserved
2759 * 80h - FFh Vendor specific
2760 */
2761static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2762 u16 *pscsi_status)
2763{
2764 struct DeviceCtlBlk *dcb = acb->active_dcb;
5cd049a5 2765 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
1da177e4
LT		 2766
2767 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2768 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2769 /* Now eval the msg */
2770 switch (srb->msgin_buf[0]) {
2771 case DISCONNECT:
2772 srb->state = SRB_DISCONNECT;
2773 break;
2774
2775 case SIMPLE_QUEUE_TAG:
2776 case HEAD_OF_QUEUE_TAG:
2777 case ORDERED_QUEUE_TAG:
2778 srb =
2779 msgin_qtag(acb, dcb,
2780 srb->msgin_buf[1]);
2781 break;
2782
2783 case MESSAGE_REJECT:
2784 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2785 DO_CLRATN | DO_DATALATCH);
2786 /* A sync nego message was rejected ! */
2787 if (srb->state & SRB_DO_SYNC_NEGO) {
2788 msgin_set_async(acb, srb);
2789 break;
2790 }
2791 /* A wide nego message was rejected ! */
2792 if (srb->state & SRB_DO_WIDE_NEGO) {
2793 msgin_set_nowide(acb, srb);
2794 break;
2795 }
2796 enable_msgout_abort(acb, srb);
2797 /*srb->state |= SRB_ABORT_SENT */
2798 break;
2799
2800 case EXTENDED_MESSAGE:
2801 /* SDTR */
2802 if (srb->msgin_buf[1] == 3
2803 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2804 msgin_set_sync(acb, srb);
2805 break;
2806 }
2807 /* WDTR */
2808 if (srb->msgin_buf[1] == 2
2809 && srb->msgin_buf[2] == EXTENDED_WDTR
2810 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2811 msgin_set_wide(acb, srb);
2812 break;
2813 }
2814 msgin_reject(acb, srb);
2815 break;
2816
2817 case MSG_IGNOREWIDE:
2818 /* Discard wide residual */
2819 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2820 break;
2821
2822 case COMMAND_COMPLETE:
2823 /* nothing has to be done */
2824 break;
2825
2826 case SAVE_POINTERS:
2827 /*
2828 * SAVE POINTER may be ignored as we have the struct
2829 * ScsiReqBlk* associated with the scsi command.
2830 */
5cd049a5 2831 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
1da177e4 2832 "SAVE POINTER rem=%i Ignore\n",
5cd049a5 2833 srb->cmd, srb->total_xfer_length);
1da177e4
LT		 2834 break;
2835
2836 case RESTORE_POINTERS:
2837 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2838 break;
2839
2840 case ABORT:
5cd049a5 2841 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
1da177e4 2842 "<%02i-%i> ABORT msg\n",
5cd049a5 2843 srb->cmd, dcb->target_id,
1da177e4
LT		 2844 dcb->target_lun);
2845 dcb->flag |= ABORT_DEV_;
2846 enable_msgout_abort(acb, srb);
2847 break;
2848
2849 default:
2850 /* reject unknown messages */
2851 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2852 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2853 srb->msg_count = 1;
2854 srb->msgout_buf[0] = dcb->identify_msg;
2855 DC395x_ENABLE_MSGOUT;
2856 srb->state |= SRB_MSGOUT;
2857 /*break; */
2858 }
2859 msgin_reject(acb, srb);
2860 }
2861
2862 /* Clear counter and MsgIn state */
2863 srb->state &= ~SRB_MSGIN;
2864 acb->msg_len = 0;
2865 }
2866 *pscsi_status = PH_BUS_FREE;
2867 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2868 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2869}
2870
2871
2872static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2873 u16 *pscsi_status)
2874{
5cd049a5 2875 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
1da177e4
LT		 2876 clear_fifo(acb, "msgin_phase1");
2877 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2878 if (!(srb->state & SRB_MSGIN)) {
2879 srb->state &= ~SRB_DISCONNECT;
2880 srb->state |= SRB_MSGIN;
2881 }
2882 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2883 /* SCSI command */
2884 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2885}
2886
2887
2888static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2889 u16 *pscsi_status)
2890{
2891}
2892
2893
2894static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2895 u16 *pscsi_status)
2896{
2897}
2898
2899
2900static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
2901{
2902 struct DeviceCtlBlk *i;
2903
2904 /* set all lun device's period, offset */
2905 if (dcb->identify_msg & 0x07)
2906 return;
2907
2908 if (acb->scan_devices) {
2909 current_sync_offset = dcb->sync_offset;
2910 return;
2911 }
2912
2913 list_for_each_entry(i, &acb->dcb_list, list)
2914 if (i->target_id == dcb->target_id) {
2915 i->sync_period = dcb->sync_period;
2916 i->sync_offset = dcb->sync_offset;
2917 i->sync_mode = dcb->sync_mode;
2918 i->min_nego_period = dcb->min_nego_period;
2919 }
2920}
2921
2922
2923static void disconnect(struct AdapterCtlBlk *acb)
2924{
2925 struct DeviceCtlBlk *dcb = acb->active_dcb;
2926 struct ScsiReqBlk *srb;
2927
2928 if (!dcb) {
2929 dprintkl(KERN_ERR, "disconnect: No such device\n");
2930 udelay(500);
2931 /* Suspend queue for a while */
53a8936c 2932 acb->last_reset =
1da177e4
LT		 2933 jiffies + HZ / 2 +
2934 HZ * acb->eeprom.delay_time;
2935 clear_fifo(acb, "disconnectEx");
2936 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2937 return;
2938 }
2939 srb = dcb->active_srb;
2940 acb->active_dcb = NULL;
5cd049a5 2941 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
1da177e4
LT		 2942
2943 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
2944 clear_fifo(acb, "disconnect");
2945 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2946 if (srb->state & SRB_UNEXPECT_RESEL) {
2947 dprintkl(KERN_ERR,
2948 "disconnect: Unexpected reselection <%02i-%i>\n",
2949 dcb->target_id, dcb->target_lun);
2950 srb->state = 0;
2951 waiting_process_next(acb);
2952 } else if (srb->state & SRB_ABORT_SENT) {
2953 dcb->flag &= ~ABORT_DEV_;
53a8936c 2954 acb->last_reset = jiffies + HZ / 2 + 1;
1da177e4
LT		 2955 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
2956 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
2957 waiting_process_next(acb);
2958 } else {
2959 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
2960 || !(srb->
2961 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
2962 /*
2963 * Selection time out
2964 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
2965 */
2966 /* Unexp. Disc / Sel Timeout */
2967 if (srb->state != SRB_START_
2968 && srb->state != SRB_MSGOUT) {
2969 srb->state = SRB_READY;
2970 dprintkl(KERN_DEBUG,
5cd049a5
CH		 2971 "disconnect: (0x%p) Unexpected\n",
2972 srb->cmd);
1da177e4
LT		 2973 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
2974 goto disc1;
2975 } else {
2976 /* Normal selection timeout */
5cd049a5
CH		 2977 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
2978 "<%02i-%i> SelTO\n", srb->cmd,
1da177e4
LT		 2979 dcb->target_id, dcb->target_lun);
2980 if (srb->retry_count++ > DC395x_MAX_RETRIES
2981 || acb->scan_devices) {
2982 srb->target_status =
2983 SCSI_STAT_SEL_TIMEOUT;
2984 goto disc1;
2985 }
2986 free_tag(dcb, srb);
cd29660d 2987 list_move(&srb->list, &dcb->srb_waiting_list);
1da177e4 2988 dprintkdbg(DBG_KG,
5cd049a5
CH		 2989 "disconnect: (0x%p) Retry\n",
2990 srb->cmd);
1da177e4
LT		 2991 waiting_set_timer(acb, HZ / 20);
2992 }
2993 } else if (srb->state & SRB_DISCONNECT) {
2994 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
2995 /*
2996 * SRB_DISCONNECT (This is what we expect!)
2997 */
2998 if (bval & 0x40) {
2999 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3000 " 0x%02x: ACK set! Other controllers?\n",
3001 bval);
3002 /* It could come from another initiator, therefore don't do much ! */
3003 } else
3004 waiting_process_next(acb);
3005 } else if (srb->state & SRB_COMPLETED) {
3006 disc1:
3007 /*
3008 ** SRB_COMPLETED
3009 */
3010 free_tag(dcb, srb);
3011 dcb->active_srb = NULL;
3012 srb->state = SRB_FREE;
3013 srb_done(acb, dcb, srb);
3014 }
3015 }
3016}
3017
3018
3019static void reselect(struct AdapterCtlBlk *acb)
3020{
3021 struct DeviceCtlBlk *dcb = acb->active_dcb;
3022 struct ScsiReqBlk *srb = NULL;
3023 u16 rsel_tar_lun_id;
3024 u8 id, lun;
3025 u8 arblostflag = 0;
3026 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3027
3028 clear_fifo(acb, "reselect");
3029 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3030 /* Read Reselected Target ID and LUN */
3031 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3032 if (dcb) { /* Arbitration lost but Reselection win */
3033 srb = dcb->active_srb;
3034 if (!srb) {
3035 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3036 "but active_srb == NULL\n");
3037 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3038 return;
3039 }
3040 /* Why the if ? */
3041 if (!acb->scan_devices) {
5cd049a5 3042 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
1da177e4 3043 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
5cd049a5 3044 srb->cmd, dcb->target_id,
1da177e4
LT		 3045 dcb->target_lun, rsel_tar_lun_id,
3046 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3047 arblostflag = 1;
3048 /*srb->state |= SRB_DISCONNECT; */
3049
3050 srb->state = SRB_READY;
3051 free_tag(dcb, srb);
cd29660d 3052 list_move(&srb->list, &dcb->srb_waiting_list);
1da177e4
LT		 3053 waiting_set_timer(acb, HZ / 20);
3054
3055 /* return; */
3056 }
3057 }
3058 /* Read Reselected Target Id and LUN */
3059 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3060 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3061 "Got %i!\n", rsel_tar_lun_id);
3062 id = rsel_tar_lun_id & 0xff;
3063 lun = (rsel_tar_lun_id >> 8) & 7;
3064 dcb = find_dcb(acb, id, lun);
3065 if (!dcb) {
3066 dprintkl(KERN_ERR, "reselect: From non existent device "
3067 "<%02i-%i>\n", id, lun);
3068 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3069 return;
3070 }
3071 acb->active_dcb = dcb;
3072
3073 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3074 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3075 "disconnection? <%02i-%i>\n",
3076 dcb->target_id, dcb->target_lun);
3077
3078 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3079 srb = acb->tmp_srb;
3080 dcb->active_srb = srb;
3081 } else {
3082 /* There can be only one! */
3083 srb = dcb->active_srb;
3084 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3085 /*
3086 * abort command
3087 */
3088 dprintkl(KERN_DEBUG,
3089 "reselect: w/o disconnected cmds <%02i-%i>\n",
3090 dcb->target_id, dcb->target_lun);
3091 srb = acb->tmp_srb;
3092 srb->state = SRB_UNEXPECT_RESEL;
3093 dcb->active_srb = srb;
3094 enable_msgout_abort(acb, srb);
3095 } else {
3096 if (dcb->flag & ABORT_DEV_) {
3097 /*srb->state = SRB_ABORT_SENT; */
3098 enable_msgout_abort(acb, srb);
3099 } else
3100 srb->state = SRB_DATA_XFER;
3101
3102 }
3103 }
3104 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3105
3106 /* Program HA ID, target ID, period and offset */
3107 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3108 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3109 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3110 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3111 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3112 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3113 /* SCSI command */
3114 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3115}
3116
3117
3118static inline u8 tagq_blacklist(char *name)
3119{
3120#ifndef DC395x_NO_TAGQ
3121#if 0
3122 u8 i;
3123 for (i = 0; i < BADDEVCNT; i++)
3124 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3125 return 1;
3126#endif
3127 return 0;
3128#else
3129 return 1;
3130#endif
3131}
3132
3133
3134static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3135{
3136 /* Check for SCSI format (ANSI and Response data format) */
3137 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3138 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3139 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3140 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3141 /* ((dcb->dev_type == TYPE_DISK)
3142 || (dcb->dev_type == TYPE_MOD)) && */
3143 !tagq_blacklist(((char *)ptr) + 8)) {
3144 if (dcb->max_command == 1)
3145 dcb->max_command =
3146 dcb->acb->tag_max_num;
3147 dcb->sync_mode |= EN_TAG_QUEUEING;
3148 /*dcb->tag_mask = 0; */
3149 } else
3150 dcb->max_command = 1;
3151 }
3152}
3153
3154
3155static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3156 struct ScsiInqData *ptr)
3157{
3158 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3159 dcb->dev_type = bval1;
3160 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3161 disc_tagq_set(dcb, ptr);
3162}
3163
3164
3165/* unmap mapped pci regions from SRB */
3166static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3167{
3168 struct scsi_cmnd *cmd = srb->cmd;
3169 enum dma_data_direction dir = cmd->sc_data_direction;
a862ea31
FT		 3170
3171 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
1da177e4
LT		 3172 /* unmap DC395x SG list */
3173 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3174 srb->sg_bus_addr, SEGMENTX_LEN);
dfda5e21
CH		 3175 dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN,
3176 DMA_TO_DEVICE);
1da177e4 3177 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
a862ea31 3178 scsi_sg_count(cmd), scsi_bufflen(cmd));
1da177e4 3179 /* unmap the sg segments */
a862ea31 3180 scsi_dma_unmap(cmd);
1da177e4
LT		 3181 }
3182}
3183
3184
3185/* unmap mapped pci sense buffer from SRB */
3186static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3187 struct ScsiReqBlk *srb)
3188{
3189 if (!(srb->flag & AUTO_REQSENSE))
3190 return;
3191 /* Unmap sense buffer */
3192 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3193 srb->segment_x[0].address);
dfda5e21
CH		 3194 dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address,
3195 srb->segment_x[0].length, DMA_FROM_DEVICE);
1da177e4
LT		 3196 /* Restore SG stuff */
3197 srb->total_xfer_length = srb->xferred;
3198 srb->segment_x[0].address =
3199 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3200 srb->segment_x[0].length =
3201 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3202}
3203
3204
3205/*
3206 * Complete execution of a SCSI command
3207 * Signal completion to the generic SCSI driver
3208 */
3209static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3210 struct ScsiReqBlk *srb)
3211{
3212 u8 tempcnt, status;
3213 struct scsi_cmnd *cmd = srb->cmd;
1da177e4 3214 enum dma_data_direction dir = cmd->sc_data_direction;
9dc399de 3215 int ckc_only = 1;
1da177e4 3216
5cd049a5 3217 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
9cb78c16 3218 srb->cmd->device->id, (u8)srb->cmd->device->lun);
9dc399de 3219 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
a862ea31
FT		 3220 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3221 scsi_sgtalbe(cmd));
1da177e4
LT		 3222 status = srb->target_status;
3223 if (srb->flag & AUTO_REQSENSE) {
3224 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3225 pci_unmap_srb_sense(acb, srb);
3226 /*
3227 ** target status..........................
3228 */
3229 srb->flag &= ~AUTO_REQSENSE;
3230 srb->adapter_status = 0;
3231 srb->target_status = CHECK_CONDITION << 1;
3232 if (debug_enabled(DBG_1)) {
3233 switch (cmd->sense_buffer[2] & 0x0f) {
3234 case NOT_READY:
3235 dprintkl(KERN_DEBUG,
3236 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3237 cmd->cmnd[0], dcb->target_id,
3238 dcb->target_lun, status, acb->scan_devices);
3239 break;
3240 case UNIT_ATTENTION:
3241 dprintkl(KERN_DEBUG,
3242 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3243 cmd->cmnd[0], dcb->target_id,
3244 dcb->target_lun, status, acb->scan_devices);
3245 break;
3246 case ILLEGAL_REQUEST:
3247 dprintkl(KERN_DEBUG,
3248 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3249 cmd->cmnd[0], dcb->target_id,
3250 dcb->target_lun, status, acb->scan_devices);
3251 break;
3252 case MEDIUM_ERROR:
3253 dprintkl(KERN_DEBUG,
3254 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3255 cmd->cmnd[0], dcb->target_id,
3256 dcb->target_lun, status, acb->scan_devices);
3257 break;
3258 case HARDWARE_ERROR:
3259 dprintkl(KERN_DEBUG,
3260 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3261 cmd->cmnd[0], dcb->target_id,
3262 dcb->target_lun, status, acb->scan_devices);
3263 break;
3264 }
3265 if (cmd->sense_buffer[7] >= 6)
3266 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3267 "(0x%08x 0x%08x)\n",
3268 cmd->sense_buffer[2], cmd->sense_buffer[12],
3269 cmd->sense_buffer[13],
3270 *((unsigned int *)(cmd->sense_buffer + 3)),
3271 *((unsigned int *)(cmd->sense_buffer + 8)));
3272 else
3273 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3274 cmd->sense_buffer[2],
3275 *((unsigned int *)(cmd->sense_buffer + 3)));
3276 }
3277
3278 if (status == (CHECK_CONDITION << 1)) {
3279 cmd->result = DID_BAD_TARGET << 16;
3280 goto ckc_e;
3281 }
3282 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3283
3284 if (srb->total_xfer_length
3285 && srb->total_xfer_length >= cmd->underflow)
3286 cmd->result =
3287 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3288 srb->end_message, CHECK_CONDITION);
3289 /*SET_RES_DID(cmd->result,DID_OK) */
3290 else
3291 cmd->result =
3292 MK_RES_LNX(DRIVER_SENSE, DID_OK,
3293 srb->end_message, CHECK_CONDITION);
3294
3295 goto ckc_e;
3296 }
3297
3298/*************************************************************/
3299 if (status) {
3300 /*
3301 * target status..........................
3302 */
3303 if (status_byte(status) == CHECK_CONDITION) {
3304 request_sense(acb, dcb, srb);
3305 return;
3306 } else if (status_byte(status) == QUEUE_FULL) {
3307 tempcnt = (u8)list_size(&dcb->srb_going_list);
3308 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3309 dcb->target_id, dcb->target_lun, tempcnt);
3310 if (tempcnt > 1)
3311 tempcnt--;
3312 dcb->max_command = tempcnt;
3313 free_tag(dcb, srb);
cd29660d 3314 list_move(&srb->list, &dcb->srb_waiting_list);
1da177e4
LT		 3315 waiting_set_timer(acb, HZ / 20);
3316 srb->adapter_status = 0;
3317 srb->target_status = 0;
3318 return;
3319 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3320 srb->adapter_status = H_SEL_TIMEOUT;
3321 srb->target_status = 0;
3322 cmd->result = DID_NO_CONNECT << 16;
3323 } else {
3324 srb->adapter_status = 0;
3325 SET_RES_DID(cmd->result, DID_ERROR);
3326 SET_RES_MSG(cmd->result, srb->end_message);
3327 SET_RES_TARGET(cmd->result, status);
3328
3329 }
3330 } else {
3331 /*
3332 ** process initiator status..........................
3333 */
3334 status = srb->adapter_status;
3335 if (status & H_OVER_UNDER_RUN) {
3336 srb->target_status = 0;
3337 SET_RES_DID(cmd->result, DID_OK);
3338 SET_RES_MSG(cmd->result, srb->end_message);
3339 } else if (srb->status & PARITY_ERROR) {
3340 SET_RES_DID(cmd->result, DID_PARITY);
3341 SET_RES_MSG(cmd->result, srb->end_message);
3342 } else { /* No error */
3343
3344 srb->adapter_status = 0;
3345 srb->target_status = 0;
3346 SET_RES_DID(cmd->result, DID_OK);
3347 }
3348 }
3349
9dc399de 3350 ckc_only = 0;
1da177e4
LT		 3351/* Check Error Conditions */
3352 ckc_e:
3353
3a5bd702
CH		 3354 pci_unmap_srb(acb, srb);
3355
9dc399de
GL		 3356 if (cmd->cmnd[0] == INQUIRY) {
3357 unsigned char *base = NULL;
3358 struct ScsiInqData *ptr;
3359 unsigned long flags = 0;
a862ea31
FT		 3360 struct scatterlist* sg = scsi_sglist(cmd);
3361 size_t offset = 0, len = sizeof(struct ScsiInqData);
9dc399de 3362
a862ea31
FT		 3363 local_irq_save(flags);
3364 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3365 ptr = (struct ScsiInqData *)(base + offset);
9dc399de
GL		 3366
3367 if (!ckc_only && (cmd->result & RES_DID) == 0
a862ea31 3368 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
9dc399de
GL		 3369 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3370 dcb->inquiry7 = ptr->Flags;
3371
1da177e4
LT		 3372 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3373 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
c65be1a6
JT		 3374 if ((cmd->result == (DID_OK << 16) ||
3375 status_byte(cmd->result) == CHECK_CONDITION)) {
9dc399de
GL		 3376 if (!dcb->init_tcq_flag) {
3377 add_dev(acb, dcb, ptr);
3378 dcb->init_tcq_flag = 1;
3379 }
1da177e4
LT		 3380 }
3381
a862ea31
FT		 3382 scsi_kunmap_atomic_sg(base);
3383 local_irq_restore(flags);
1da177e4
LT		 3384 }
3385
1da177e4 3386 /* Here is the info for Doug Gilbert's sg3 ... */
a862ea31 3387 scsi_set_resid(cmd, srb->total_xfer_length);
1da177e4
LT		 3388 /* This may be interpreted by sb. or not ... */
3389 cmd->SCp.this_residual = srb->total_xfer_length;
3390 cmd->SCp.buffers_residual = 0;
3391 if (debug_enabled(DBG_KG)) {
3392 if (srb->total_xfer_length)
5cd049a5 3393 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
1da177e4 3394 "cmnd=0x%02x Missed %i bytes\n",
9cb78c16 3395 cmd, cmd->device->id, (u8)cmd->device->lun,
1da177e4
LT		 3396 cmd->cmnd[0], srb->total_xfer_length);
3397 }
3398
cd29660d
CH		 3399 if (srb != acb->tmp_srb) {
3400 /* Add to free list */
5cd049a5
CH		 3401 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3402 cmd, cmd->result);
cd29660d
CH		 3403 list_move_tail(&srb->list, &acb->srb_free_list);
3404 } else {
3405 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
1da177e4 3406 }
1da177e4
LT		 3407
3408 cmd->scsi_done(cmd);
3409 waiting_process_next(acb);
3410}
3411
3412
3413/* abort all cmds in our queues */
3414static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3415 struct scsi_cmnd *cmd, u8 force)
3416{
3417 struct DeviceCtlBlk *dcb;
3418 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3419
3420 list_for_each_entry(dcb, &acb->dcb_list, list) {
3421 struct ScsiReqBlk *srb;
3422 struct ScsiReqBlk *tmp;
3423 struct scsi_cmnd *p;
3424
3425 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3426 enum dma_data_direction dir;
3427 int result;
3428
3429 p = srb->cmd;
3430 dir = p->sc_data_direction;
3431 result = MK_RES(0, did_flag, 0, 0);
5cd049a5 3432 printk("G:%p(%02i-%i) ", p,
9cb78c16 3433 p->device->id, (u8)p->device->lun);
cd29660d 3434 list_del(&srb->list);
1da177e4 3435 free_tag(dcb, srb);
cd29660d 3436 list_add_tail(&srb->list, &acb->srb_free_list);
1da177e4
LT		 3437 p->result = result;
3438 pci_unmap_srb_sense(acb, srb);
3439 pci_unmap_srb(acb, srb);
3440 if (force) {
3441 /* For new EH, we normally don't need to give commands back,
3442 * as they all complete or all time out */
3443 p->scsi_done(p);
3444 }
3445 }
3446 if (!list_empty(&dcb->srb_going_list))
3447 dprintkl(KERN_DEBUG,
3448 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3449 dcb->target_id, dcb->target_lun);
3450 if (dcb->tag_mask)
3451 dprintkl(KERN_DEBUG,
3452 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3453 dcb->target_id, dcb->target_lun,
3454 dcb->tag_mask);
3455
3456 /* Waiting queue */
3457 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3458 int result;
3459 p = srb->cmd;
3460
3461 result = MK_RES(0, did_flag, 0, 0);
5cd049a5 3462 printk("W:%p<%02i-%i>", p, p->device->id,
9cb78c16 3463 (u8)p->device->lun);
cd29660d 3464 list_move_tail(&srb->list, &acb->srb_free_list);
1da177e4
LT		 3465 p->result = result;
3466 pci_unmap_srb_sense(acb, srb);
3467 pci_unmap_srb(acb, srb);
3468 if (force) {
3469 /* For new EH, we normally don't need to give commands back,
3470 * as they all complete or all time out */
3471 cmd->scsi_done(cmd);
3472 }
3473 }
3474 if (!list_empty(&dcb->srb_waiting_list))
3475 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3476 list_size(&dcb->srb_waiting_list), dcb->target_id,
3477 dcb->target_lun);
3478 dcb->flag &= ~ABORT_DEV_;
3479 }
3480 printk("\n");
3481}
3482
3483
3484static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3485{
3486 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3487 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3488 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3489
3490 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3491 /* nothing */;
3492}
3493
3494
3495static void set_basic_config(struct AdapterCtlBlk *acb)
3496{
3497 u8 bval;
3498 u16 wval;
3499 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3500 if (acb->config & HCC_PARITY)
3501 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3502 else
3503 bval = PHASELATCH | INITIATOR | BLOCKRST;
3504
3505 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3506
3507 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3508 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3509 /* program Host ID */
3510 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3511 /* set ansynchronous transfer */
3512 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3513 /* Turn LED control off */
3514 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3515 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3516 /* DMA config */
3517 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3518 wval |=
3519 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3520 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3521 /* Clear pending interrupt status */
3522 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3523 /* Enable SCSI interrupt */
3524 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3525 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3526 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3527 );
3528}
3529
3530
3531static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3532{
3533 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3534 /* delay half a second */
3535 if (timer_pending(&acb->waiting_timer))
3536 del_timer(&acb->waiting_timer);
3537
3538 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3539 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3540 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3541 udelay(500);
3542 /* Maybe we locked up the bus? Then lets wait even longer ... */
53a8936c 3543 acb->last_reset =
1da177e4
LT		 3544 jiffies + 5 * HZ / 2 +
3545 HZ * acb->eeprom.delay_time;
3546
3547 clear_fifo(acb, "scsi_reset_detect");
3548 set_basic_config(acb);
3549 /*1.25 */
3550 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3551
3552 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3553 acb->acb_flag |= RESET_DONE;
3554 } else {
3555 acb->acb_flag |= RESET_DETECT;
3556 reset_dev_param(acb);
3557 doing_srb_done(acb, DID_RESET, NULL, 1);
3558 /*DC395x_RecoverSRB( acb ); */
3559 acb->active_dcb = NULL;
3560 acb->acb_flag = 0;
3561 waiting_process_next(acb);
3562 }
3563}
3564
3565
3566static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3567 struct ScsiReqBlk *srb)
3568{
3569 struct scsi_cmnd *cmd = srb->cmd;
5cd049a5 3570 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
9cb78c16 3571 cmd, cmd->device->id, (u8)cmd->device->lun);
1da177e4
LT		 3572
3573 srb->flag |= AUTO_REQSENSE;
3574 srb->adapter_status = 0;
3575 srb->target_status = 0;
3576
3577 /* KG: Can this prevent crap sense data ? */
b80ca4f7 3578 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1da177e4
LT		 3579
3580 /* Save some data */
3581 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3582 srb->segment_x[0].address;
3583 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3584 srb->segment_x[0].length;
3585 srb->xferred = srb->total_xfer_length;
3586 /* srb->segment_x : a one entry of S/G list table */
b80ca4f7
FT		 3587 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3588 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
1da177e4 3589 /* Map sense buffer */
dfda5e21
CH		 3590 srb->segment_x[0].address = dma_map_single(&acb->dev->dev,
3591 cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
3592 DMA_FROM_DEVICE);
1da177e4
LT		 3593 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3594 cmd->sense_buffer, srb->segment_x[0].address,
b80ca4f7 3595 SCSI_SENSE_BUFFERSIZE);
1da177e4
LT		 3596 srb->sg_count = 1;
3597 srb->sg_index = 0;
3598
3599 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3600 dprintkl(KERN_DEBUG,
5cd049a5
CH		 3601 "request_sense: (0x%p) failed <%02i-%i>\n",
3602 srb->cmd, dcb->target_id, dcb->target_lun);
cd29660d 3603 list_move(&srb->list, &dcb->srb_waiting_list);
1da177e4
LT		 3604 waiting_set_timer(acb, HZ / 100);
3605 }
3606}
3607
3608
3609/**
3610 * device_alloc - Allocate a new device instance. This create the
3611 * devices instance and sets up all the data items. The adapter
3612 * instance is required to obtain confiuration information for this
3613 * device. This does *not* add this device to the adapters device
3614 * list.
3615 *
3616 * @acb: The adapter to obtain configuration information from.
3617 * @target: The target for the new device.
3618 * @lun: The lun for the new device.
3619 *
d6e05edc 3620 * Return the new device if successful or NULL on failure.
1da177e4
LT		 3621 **/
3622static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3623 u8 target, u8 lun)
3624{
3625 struct NvRamType *eeprom = &acb->eeprom;
3626 u8 period_index = eeprom->target[target].period & 0x07;
3627 struct DeviceCtlBlk *dcb;
3628
3629 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3630 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3631 if (!dcb)
3632 return NULL;
3633 dcb->acb = NULL;
3634 INIT_LIST_HEAD(&dcb->srb_going_list);
3635 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3636 dcb->active_srb = NULL;
3637 dcb->tag_mask = 0;
3638 dcb->max_command = 1;
3639 dcb->target_id = target;
3640 dcb->target_lun = lun;
208afec4 3641 dcb->dev_mode = eeprom->target[target].cfg0;
1da177e4
LT		 3642#ifndef DC395x_NO_DISCONNECT
3643 dcb->identify_msg =
3644 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3645#else
3646 dcb->identify_msg = IDENTIFY(0, lun);
3647#endif
1da177e4
LT		 3648 dcb->inquiry7 = 0;
3649 dcb->sync_mode = 0;
3650 dcb->min_nego_period = clock_period[period_index];
3651 dcb->sync_period = 0;
3652 dcb->sync_offset = 0;
3653 dcb->flag = 0;
3654
3655#ifndef DC395x_NO_WIDE
3656 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3657 && (acb->config & HCC_WIDE_CARD))
3658 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3659#endif
3660#ifndef DC395x_NO_SYNC
3661 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3662 if (!(lun) || current_sync_offset)
3663 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3664#endif
3665 if (dcb->target_lun != 0) {
3666 /* Copy settings */
3667 struct DeviceCtlBlk *p;
3668 list_for_each_entry(p, &acb->dcb_list, list)
3669 if (p->target_id == dcb->target_id)
3670 break;
3671 dprintkdbg(DBG_1,
3672 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3673 dcb->target_id, dcb->target_lun,
3674 p->target_id, p->target_lun);
3675 dcb->sync_mode = p->sync_mode;
3676 dcb->sync_period = p->sync_period;
3677 dcb->min_nego_period = p->min_nego_period;
3678 dcb->sync_offset = p->sync_offset;
3679 dcb->inquiry7 = p->inquiry7;
3680 }
3681 return dcb;
3682}
3683
3684
3685/**
3686 * adapter_add_device - Adds the device instance to the adaptor instance.
3687 *
3688 * @acb: The adapter device to be updated
b595076a 3689 * @dcb: A newly created and initialised device instance to add.
1da177e4
LT		 3690 **/
3691static void adapter_add_device(struct AdapterCtlBlk *acb,
3692 struct DeviceCtlBlk *dcb)
3693{
3694 /* backpointer to adapter */
3695 dcb->acb = acb;
3696
3697 /* set run_robin to this device if it is currently empty */
3698 if (list_empty(&acb->dcb_list))
3699 acb->dcb_run_robin = dcb;
3700
3701 /* add device to list */
3702 list_add_tail(&dcb->list, &acb->dcb_list);
3703
3704 /* update device maps */
3705 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3706 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3707}
3708
3709
3710/**
3711 * adapter_remove_device - Removes the device instance from the adaptor
3712 * instance. The device instance is not check in any way or freed by this.
3713 * The caller is expected to take care of that. This will simply remove the
3714 * device from the adapters data strcutures.
3715 *
3716 * @acb: The adapter device to be updated
3717 * @dcb: A device that has previously been added to the adapter.
3718 **/
3719static void adapter_remove_device(struct AdapterCtlBlk *acb,
3720 struct DeviceCtlBlk *dcb)
3721{
3722 struct DeviceCtlBlk *i;
3723 struct DeviceCtlBlk *tmp;
3724 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3725 dcb->target_id, dcb->target_lun);
3726
3727 /* fix up any pointers to this device that we have in the adapter */
3728 if (acb->active_dcb == dcb)
3729 acb->active_dcb = NULL;
3730 if (acb->dcb_run_robin == dcb)
3731 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3732
3733 /* unlink from list */
3734 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3735 if (dcb == i) {
3736 list_del(&i->list);
3737 break;
3738 }
3739
3740 /* clear map and children */
3741 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3742 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3743 dcb->acb = NULL;
3744}
3745
3746
3747/**
3748 * adapter_remove_and_free_device - Removes a single device from the adapter
3749 * and then frees the device information.
3750 *
3751 * @acb: The adapter device to be updated
3752 * @dcb: A device that has previously been added to the adapter.
3753 */
3754static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3755 struct DeviceCtlBlk *dcb)
3756{
3757 if (list_size(&dcb->srb_going_list) > 1) {
3758 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3759 "Won't remove because of %i active requests.\n",
3760 dcb->target_id, dcb->target_lun,
3761 list_size(&dcb->srb_going_list));
3762 return;
3763 }
3764 adapter_remove_device(acb, dcb);
3765 kfree(dcb);
3766}
3767
3768
3769/**
3770 * adapter_remove_and_free_all_devices - Removes and frees all of the
3771 * devices associated with the specified adapter.
3772 *
3773 * @acb: The adapter from which all devices should be removed.
3774 **/
3775static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3776{
3777 struct DeviceCtlBlk *dcb;
3778 struct DeviceCtlBlk *tmp;
3779 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3780 list_size(&acb->dcb_list));
3781
3782 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3783 adapter_remove_and_free_device(acb, dcb);
3784}
3785
3786
3787/**
3788 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3789 * scsi device that we need to deal with. We allocate a new device and then
3790 * insert that device into the adapters device list.
3791 *
3792 * @scsi_device: The new scsi device that we need to handle.
3793 **/
3794static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3795{
3796 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3797 struct DeviceCtlBlk *dcb;
3798
3799 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3800 if (!dcb)
3801 return -ENOMEM;
3802 adapter_add_device(acb, dcb);
3803
3804 return 0;
3805}
3806
3807
3808/**
3809 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3810 * device that is going away.
3811 *
3812 * @scsi_device: The new scsi device that we need to handle.
3813 **/
3814static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3815{
3816 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3817 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3818 if (dcb)
3819 adapter_remove_and_free_device(acb, dcb);
3820}
3821
3822
3823
3824
3825/**
3826 * trms1040_wait_30us: wait for 30 us
3827 *
3828 * Waits for 30us (using the chip by the looks of it..)
3829 *
3830 * @io_port: base I/O address
3831 **/
6f039790 3832static void trms1040_wait_30us(unsigned long io_port)
1da177e4
LT		 3833{
3834 /* ScsiPortStallExecution(30); wait 30 us */
3835 outb(5, io_port + TRM_S1040_GEN_TIMER);
3836 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3837 /* nothing */ ;
3838}
3839
3840
3841/**
3842 * trms1040_write_cmd - write the secified command and address to
3843 * chip
3844 *
3845 * @io_port: base I/O address
3846 * @cmd: SB + op code (command) to send
3847 * @addr: address to send
3848 **/
6f039790 3849static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
1da177e4
LT		 3850{
3851 int i;
3852 u8 send_data;
3853
3854 /* program SB + OP code */
3855 for (i = 0; i < 3; i++, cmd <<= 1) {
3856 send_data = NVR_SELECT;
3857 if (cmd & 0x04) /* Start from bit 2 */
3858 send_data |= NVR_BITOUT;
3859
3860 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3861 trms1040_wait_30us(io_port);
3862 outb((send_data | NVR_CLOCK),
3863 io_port + TRM_S1040_GEN_NVRAM);
3864 trms1040_wait_30us(io_port);
3865 }
3866
3867 /* send address */
3868 for (i = 0; i < 7; i++, addr <<= 1) {
3869 send_data = NVR_SELECT;
3870 if (addr & 0x40) /* Start from bit 6 */
3871 send_data |= NVR_BITOUT;
3872
3873 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3874 trms1040_wait_30us(io_port);
3875 outb((send_data | NVR_CLOCK),
3876 io_port + TRM_S1040_GEN_NVRAM);
3877 trms1040_wait_30us(io_port);
3878 }
3879 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3880 trms1040_wait_30us(io_port);
3881}
3882
3883
3884/**
3885 * trms1040_set_data - store a single byte in the eeprom
3886 *
3887 * Called from write all to write a single byte into the SSEEPROM
3888 * Which is done one bit at a time.
3889 *
3890 * @io_port: base I/O address
3891 * @addr: offset into EEPROM
3892 * @byte: bytes to write
3893 **/
6f039790 3894static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
1da177e4
LT		 3895{
3896 int i;
3897 u8 send_data;
3898
3899 /* Send write command & address */
3900 trms1040_write_cmd(io_port, 0x05, addr);
3901
3902 /* Write data */
3903 for (i = 0; i < 8; i++, byte <<= 1) {
3904 send_data = NVR_SELECT;
3905 if (byte & 0x80) /* Start from bit 7 */
3906 send_data |= NVR_BITOUT;
3907
3908 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3909 trms1040_wait_30us(io_port);
3910 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3911 trms1040_wait_30us(io_port);
3912 }
3913 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3914 trms1040_wait_30us(io_port);
3915
3916 /* Disable chip select */
3917 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3918 trms1040_wait_30us(io_port);
3919
3920 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3921 trms1040_wait_30us(io_port);
3922
3923 /* Wait for write ready */
3924 while (1) {
3925 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3926 trms1040_wait_30us(io_port);
3927
3928 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3929 trms1040_wait_30us(io_port);
3930
3931 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
3932 break;
3933 }
3934
3935 /* Disable chip select */
3936 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3937}
3938
3939
3940/**
3941 * trms1040_write_all - write 128 bytes to the eeprom
3942 *
3943 * Write the supplied 128 bytes to the chips SEEPROM
3944 *
3945 * @eeprom: the data to write
3946 * @io_port: the base io port
3947 **/
6f039790 3948static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
1da177e4
LT		 3949{
3950 u8 *b_eeprom = (u8 *)eeprom;
3951 u8 addr;
3952
3953 /* Enable SEEPROM */
3954 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3955 io_port + TRM_S1040_GEN_CONTROL);
3956
3957 /* write enable */
3958 trms1040_write_cmd(io_port, 0x04, 0xFF);
3959 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3960 trms1040_wait_30us(io_port);
3961
3962 /* write */
3963 for (addr = 0; addr < 128; addr++, b_eeprom++)
3964 trms1040_set_data(io_port, addr, *b_eeprom);
3965
3966 /* write disable */
3967 trms1040_write_cmd(io_port, 0x04, 0x00);
3968 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3969 trms1040_wait_30us(io_port);
3970
3971 /* Disable SEEPROM */
3972 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3973 io_port + TRM_S1040_GEN_CONTROL);
3974}
3975
3976
3977/**
3978 * trms1040_get_data - get a single byte from the eeprom
3979 *
3980 * Called from read all to read a single byte into the SSEEPROM
3981 * Which is done one bit at a time.
3982 *
3983 * @io_port: base I/O address
3984 * @addr: offset into SEEPROM
3985 *
59c51591 3986 * Returns the byte read.
1da177e4 3987 **/
6f039790 3988static u8 trms1040_get_data(unsigned long io_port, u8 addr)
1da177e4
LT		 3989{
3990 int i;
3991 u8 read_byte;
3992 u8 result = 0;
3993
3994 /* Send read command & address */
3995 trms1040_write_cmd(io_port, 0x06, addr);
3996
3997 /* read data */
3998 for (i = 0; i < 8; i++) {
3999 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4000 trms1040_wait_30us(io_port);
4001 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4002
4003 /* Get data bit while falling edge */
4004 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4005 result <<= 1;
4006 if (read_byte & NVR_BITIN)
4007 result |= 1;
4008
4009 trms1040_wait_30us(io_port);
4010 }
4011
4012 /* Disable chip select */
4013 outb(0, io_port + TRM_S1040_GEN_NVRAM);
4014 return result;
4015}
4016
4017
4018/**
4019 * trms1040_read_all - read all bytes from the eeprom
4020 *
4021 * Read the 128 bytes from the SEEPROM.
4022 *
4023 * @eeprom: where to store the data
4024 * @io_port: the base io port
4025 **/
6f039790 4026static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
1da177e4
LT		 4027{
4028 u8 *b_eeprom = (u8 *)eeprom;
4029 u8 addr;
4030
4031 /* Enable SEEPROM */
4032 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4033 io_port + TRM_S1040_GEN_CONTROL);
4034
4035 /* read details */
4036 for (addr = 0; addr < 128; addr++, b_eeprom++)
4037 *b_eeprom = trms1040_get_data(io_port, addr);
4038
4039 /* Disable SEEPROM */
4040 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4041 io_port + TRM_S1040_GEN_CONTROL);
4042}
4043
4044
4045
4046/**
4047 * check_eeprom - get and check contents of the eeprom
4048 *
4049 * Read seeprom 128 bytes into the memory provider in eeprom.
4050 * Checks the checksum and if it's not correct it uses a set of default
4051 * values.
4052 *
4053 * @eeprom: caller allocated strcuture to read the eeprom data into
4054 * @io_port: io port to read from
4055 **/
6f039790 4056static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
1da177e4
LT		 4057{
4058 u16 *w_eeprom = (u16 *)eeprom;
4059 u16 w_addr;
4060 u16 cksum;
4061 u32 d_addr;
4062 u32 *d_eeprom;
4063
4064 trms1040_read_all(eeprom, io_port); /* read eeprom */
4065
4066 cksum = 0;
4067 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4068 w_addr++, w_eeprom++)
4069 cksum += *w_eeprom;
4070 if (cksum != 0x1234) {
4071 /*
4072 * Checksum is wrong.
4073 * Load a set of defaults into the eeprom buffer
4074 */
4075 dprintkl(KERN_WARNING,
4076 "EEProm checksum error: using default values and options.\n");
4077 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4078 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4079 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4080 eeprom->sub_sys_id[1] =
4081 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4082 eeprom->sub_class = 0x00;
4083 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4084 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4085 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4086 eeprom->device_id[1] =
4087 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4088 eeprom->reserved = 0x00;
4089
4090 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4091 d_addr < 16; d_addr++, d_eeprom++)
4092 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4093
4094 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4095 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4096 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4097 *d_eeprom = 0x00;
4098
4099 /* Now load defaults (maybe set by boot/module params) */
4100 set_safe_settings();
4101 fix_settings();
4102 eeprom_override(eeprom);
4103
4104 eeprom->cksum = 0x00;
4105 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4106 w_addr < 63; w_addr++, w_eeprom++)
4107 cksum += *w_eeprom;
4108
4109 *w_eeprom = 0x1234 - cksum;
4110 trms1040_write_all(eeprom, io_port);
4111 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4112 } else {
4113 set_safe_settings();
4114 eeprom_index_to_delay(eeprom);
4115 eeprom_override(eeprom);
4116 }
4117}
4118
4119
4120/**
4121 * print_eeprom_settings - output the eeprom settings
4122 * to the kernel log so people can see what they were.
4123 *
4124 * @eeprom: The eeprom data strucutre to show details for.
4125 **/
6f039790 4126static void print_eeprom_settings(struct NvRamType *eeprom)
1da177e4
LT		 4127{
4128 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4129 eeprom->scsi_id,
4130 eeprom->target[0].period,
4131 clock_speed[eeprom->target[0].period] / 10,
4132 clock_speed[eeprom->target[0].period] % 10,
4133 eeprom->target[0].cfg0);
4134 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4135 eeprom->channel_cfg, eeprom->max_tag,
4136 1 << eeprom->max_tag, eeprom->delay_time);
4137}
4138
4139
4140/* Free SG tables */
4141static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4142{
4143 int i;
4144 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4145
4146 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
c9475cb0 4147 kfree(acb->srb_array[i].segment_x);
1da177e4
LT		 4148}
4149
4150
4151/*
4152 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4153 * should never cross a page boundary */
6f039790 4154static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
1da177e4
LT		 4155{
4156 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4157 *SEGMENTX_LEN;
4158 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4159 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4160 int srb_idx = 0;
4161 unsigned i = 0;
8144f213 4162 struct SGentry *uninitialized_var(ptr);
1da177e4 4163
b4b08e58 4164 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
1da177e4 4165 acb->srb_array[i].segment_x = NULL;
1da177e4
LT		 4166
4167 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4168 while (pages--) {
5cbded58 4169 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
1da177e4
LT		 4170 if (!ptr) {
4171 adapter_sg_tables_free(acb);
4172 return 1;
4173 }
4174 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4175 PAGE_SIZE, ptr, srb_idx);
4176 i = 0;
4177 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4178 acb->srb_array[srb_idx++].segment_x =
4179 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4180 }
4181 if (i < srbs_per_page)
4182 acb->srb.segment_x =
4183 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4184 else
4185 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
1da177e4
LT		 4186 return 0;
4187}
4188
4189
4190
4191/**
4192 * adapter_print_config - print adapter connection and termination
4193 * config
4194 *
4195 * The io port in the adapter needs to have been set before calling
4196 * this function.
4197 *
4198 * @acb: The adapter to print the information for.
4199 **/
6f039790 4200static void adapter_print_config(struct AdapterCtlBlk *acb)
1da177e4
LT		 4201{
4202 u8 bval;
4203
4204 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4205 dprintkl(KERN_INFO, "%sConnectors: ",
4206 ((bval & WIDESCSI) ? "(Wide) " : ""));
4207 if (!(bval & CON5068))
4208 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4209 if (!(bval & CON68))
4210 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4211 if (!(bval & CON50))
4212 printk("int50 ");
4213 if ((bval & (CON5068 | CON50 | CON68)) ==
4214 0 /*(CON5068 | CON50 | CON68) */ )
4215 printk(" Oops! (All 3?) ");
4216 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4217 printk(" Termination: ");
4218 if (bval & DIS_TERM)
4219 printk("Disabled\n");
4220 else {
4221 if (bval & AUTOTERM)
4222 printk("Auto ");
4223 if (bval & LOW8TERM)
4224 printk("Low ");
4225 if (bval & UP8TERM)
4226 printk("High ");
4227 printk("\n");
4228 }
4229}
4230
4231
4232/**
4233 * adapter_init_params - Initialize the various parameters in the
4234 * adapter structure. Note that the pointer to the scsi_host is set
4235 * early (when this instance is created) and the io_port and irq
4236 * values are set later after they have been reserved. This just gets
4237 * everything set to a good starting position.
4238 *
4239 * The eeprom structure in the adapter needs to have been set before
4240 * calling this function.
4241 *
4242 * @acb: The adapter to initialize.
4243 **/
6f039790 4244static void adapter_init_params(struct AdapterCtlBlk *acb)
1da177e4
LT		 4245{
4246 struct NvRamType *eeprom = &acb->eeprom;
4247 int i;
4248
4249 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4250 /* NOTE: acb->io_port_base is set at port registration time */
4251 /* NOTE: acb->io_port_len is set at port registration time */
4252
4253 INIT_LIST_HEAD(&acb->dcb_list);
4254 acb->dcb_run_robin = NULL;
4255 acb->active_dcb = NULL;
4256
4257 INIT_LIST_HEAD(&acb->srb_free_list);
4258 /* temp SRB for Q tag used or abort command used */
4259 acb->tmp_srb = &acb->srb;
af53b89b
KC		 4260 timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4261 timer_setup(&acb->selto_timer, NULL, 0);
1da177e4
LT		 4262
4263 acb->srb_count = DC395x_MAX_SRB_CNT;
4264
4265 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4266 /* NOTE: acb->irq_level is set at IRQ registration time */
4267
4268 acb->tag_max_num = 1 << eeprom->max_tag;
4269 if (acb->tag_max_num > 30)
4270 acb->tag_max_num = 30;
4271
4272 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4273 acb->gmode2 = eeprom->channel_cfg;
4274 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4275
4276 if (eeprom->channel_cfg & NAC_SCANLUN)
4277 acb->lun_chk = 1;
4278 acb->scan_devices = 1;
4279
4280 acb->scsi_host->this_id = eeprom->scsi_id;
4281 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4282
4283 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4284 acb->dcb_map[i] = 0;
4285
4286 acb->msg_len = 0;
4287
4288 /* link static array of srbs into the srb free list */
4289 for (i = 0; i < acb->srb_count - 1; i++)
cd29660d 4290 list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list);
1da177e4
LT		 4291}
4292
4293
4294/**
4295 * adapter_init_host - Initialize the scsi host instance based on
4296 * values that we have already stored in the adapter instance. There's
4297 * some mention that a lot of these are deprecated, so we won't use
4298 * them (we'll use the ones in the adapter instance) but we'll fill
4299 * them in in case something else needs them.
4300 *
4301 * The eeprom structure, irq and io ports in the adapter need to have
4302 * been set before calling this function.
4303 *
4304 * @host: The scsi host instance to fill in the values for.
4305 **/
6f039790 4306static void adapter_init_scsi_host(struct Scsi_Host *host)
1da177e4
LT		 4307{
4308 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4309 struct NvRamType *eeprom = &acb->eeprom;
4310
4311 host->max_cmd_len = 24;
4312 host->can_queue = DC395x_MAX_CMD_QUEUE;
4313 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4314 host->this_id = (int)eeprom->scsi_id;
4315 host->io_port = acb->io_port_base;
4316 host->n_io_port = acb->io_port_len;
4317 host->dma_channel = -1;
4318 host->unique_id = acb->io_port_base;
4319 host->irq = acb->irq_level;
53a8936c 4320 acb->last_reset = jiffies;
1da177e4
LT		 4321
4322 host->max_id = 16;
4323 if (host->max_id - 1 == eeprom->scsi_id)
4324 host->max_id--;
4325
1da177e4
LT		 4326 if (eeprom->channel_cfg & NAC_SCANLUN)
4327 host->max_lun = 8;
4328 else
4329 host->max_lun = 1;
1da177e4
LT		 4330}
4331
4332
4333/**
4334 * adapter_init_chip - Get the chip into a know state and figure out
4335 * some of the settings that apply to this adapter.
4336 *
4337 * The io port in the adapter needs to have been set before calling
4338 * this function. The config will be configured correctly on return.
4339 *
4340 * @acb: The adapter which we are to init.
4341 **/
6f039790 4342static void adapter_init_chip(struct AdapterCtlBlk *acb)
1da177e4
LT		 4343{
4344 struct NvRamType *eeprom = &acb->eeprom;
4345
4346 /* Mask all the interrupt */
4347 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4348 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4349
4350 /* Reset SCSI module */
4351 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4352
4353 /* Reset PCI/DMA module */
4354 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4355 udelay(20);
4356
4357 /* program configuration 0 */
4358 acb->config = HCC_AUTOTERM | HCC_PARITY;
4359 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4360 acb->config |= HCC_WIDE_CARD;
4361
4362 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4363 acb->config |= HCC_SCSI_RESET;
4364
4365 if (acb->config & HCC_SCSI_RESET) {
4366 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4367 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4368
4369 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4370 /*spin_unlock_irq (&io_request_lock); */
4371 udelay(500);
4372
53a8936c 4373 acb->last_reset =
1da177e4
LT		 4374 jiffies + HZ / 2 +
4375 HZ * acb->eeprom.delay_time;
4376
4377 /*spin_lock_irq (&io_request_lock); */
4378 }
4379}
4380
4381
4382/**
4383 * init_adapter - Grab the resource for the card, setup the adapter
4384 * information, set the card into a known state, create the various
4385 * tables etc etc. This basically gets all adapter information all up
b595076a 4386 * to date, initialised and gets the chip in sync with it.
1da177e4
LT		 4387 *
4388 * @host: This hosts adapter structure
4389 * @io_port: The base I/O port
4390 * @irq: IRQ
4391 *
4392 * Returns 0 if the initialization succeeds, any other value on
4393 * failure.
4394 **/
6f039790
GKH		 4395static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4396 u32 io_port_len, unsigned int irq)
1da177e4
LT		 4397{
4398 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4399 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4400 goto failed;
4401 }
4402 /* store port base to indicate we have registered it */
4403 acb->io_port_base = io_port;
4404 acb->io_port_len = io_port_len;
4405
1d6f359a 4406 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
1da177e4
LT		 4407 /* release the region we just claimed */
4408 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4409 goto failed;
4410 }
4411 /* store irq to indicate we have registered it */
4412 acb->irq_level = irq;
4413
4414 /* get eeprom configuration information and command line settings etc */
4415 check_eeprom(&acb->eeprom, io_port);
4416 print_eeprom_settings(&acb->eeprom);
4417
4418 /* setup adapter control block */
4419 adapter_init_params(acb);
4420
4421 /* display card connectors/termination settings */
4422 adapter_print_config(acb);
4423
4424 if (adapter_sg_tables_alloc(acb)) {
4425 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4426 goto failed;
4427 }
4428 adapter_init_scsi_host(acb->scsi_host);
4429 adapter_init_chip(acb);
4430 set_basic_config(acb);
4431
4432 dprintkdbg(DBG_0,
4433 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4434 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4435 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4436 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4437 return 0;
4438
4439failed:
4440 if (acb->irq_level)
4441 free_irq(acb->irq_level, acb);
4442 if (acb->io_port_base)
4443 release_region(acb->io_port_base, acb->io_port_len);
4444 adapter_sg_tables_free(acb);
4445
4446 return 1;
4447}
4448
4449
4450/**
4451 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4452 * stopping all operations and disabling interrupt generation on the
4453 * card.
4454 *
4455 * @acb: The adapter which we are to shutdown.
4456 **/
4457static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4458{
4459 /* disable interrupts */
4460 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4461 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4462
4463 /* reset the scsi bus */
4464 if (acb->config & HCC_SCSI_RESET)
4465 reset_scsi_bus(acb);
4466
3a4fa0a2 4467 /* clear any pending interrupt state */
1da177e4
LT		 4468 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4469}
4470
4471
4472
4473/**
4474 * adapter_uninit - Shut down the chip and release any resources that
4475 * we had allocated. Once this returns the adapter should not be used
4476 * anymore.
4477 *
4478 * @acb: The adapter which we are to un-initialize.
4479 **/
4480static void adapter_uninit(struct AdapterCtlBlk *acb)
4481{
4482 unsigned long flags;
4483 DC395x_LOCK_IO(acb->scsi_host, flags);
4484
4485 /* remove timers */
4486 if (timer_pending(&acb->waiting_timer))
4487 del_timer(&acb->waiting_timer);
4488 if (timer_pending(&acb->selto_timer))
4489 del_timer(&acb->selto_timer);
4490
4491 adapter_uninit_chip(acb);
4492 adapter_remove_and_free_all_devices(acb);
4493 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4494
4495 if (acb->irq_level)
4496 free_irq(acb->irq_level, acb);
4497 if (acb->io_port_base)
4498 release_region(acb->io_port_base, acb->io_port_len);
4499
4500 adapter_sg_tables_free(acb);
4501}
4502
4503
1da177e4
LT		 4504#undef YESNO
4505#define YESNO(YN) \
0c3de38f
RV		 4506 if (YN) seq_printf(m, " Yes ");\
4507 else seq_printf(m, " No ")
1da177e4 4508
d32812ae 4509static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
1da177e4
LT		 4510{
4511 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4512 int spd, spd1;
1da177e4
LT		 4513 struct DeviceCtlBlk *dcb;
4514 unsigned long flags;
4515 int dev;
4516
3d30079c
RV		 4517 seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4518 " Driver Version " DC395X_VERSION "\n");
1da177e4
LT		 4519
4520 DC395x_LOCK_IO(acb->scsi_host, flags);
4521
0c3de38f
RV		 4522 seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4523 seq_printf(m, "DC395U/UW/F DC315/U %s\n",
1da177e4 4524 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
0c3de38f
RV		 4525 seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4526 seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4527 seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
1da177e4 4528
0c3de38f
RV		 4529 seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4530 seq_printf(m, "AdapterID %i\n", host->this_id);
1da177e4 4531
0c3de38f
RV		 4532 seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4533 /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4534 seq_printf(m, ", FilterCfg 0x%02x",
1da177e4 4535 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
0c3de38f
RV		 4536 seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4537 /*seq_printf(m, "\n"); */
1da177e4 4538
0c3de38f
RV		 4539 seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4540 seq_printf(m, "Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
1da177e4
LT		 4541 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4542 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4543 acb->dcb_map[6], acb->dcb_map[7]);
0c3de38f 4544 seq_printf(m, " %02x %02x %02x %02x %02x %02x %02x %02x\n",
1da177e4
LT		 4545 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4546 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4547 acb->dcb_map[14], acb->dcb_map[15]);
4548
91c40f24
RV		 4549 seq_puts(m,
4550 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
1da177e4
LT		 4551
4552 dev = 0;
4553 list_for_each_entry(dcb, &acb->dcb_list, list) {
4554 int nego_period;
0c3de38f 4555 seq_printf(m, "%02i %02i %02i ", dev, dcb->target_id,
1da177e4
LT		 4556 dcb->target_lun);
4557 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4558 YESNO(dcb->sync_offset);
4559 YESNO(dcb->sync_period & WIDE_SYNC);
4560 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4561 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4562 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4563 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4564 if (dcb->sync_offset)
0c3de38f 4565 seq_printf(m, " %03i ns ", nego_period);
1da177e4 4566 else
0c3de38f 4567 seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
1da177e4
LT		 4568
4569 if (dcb->sync_offset & 0x0f) {
4570 spd = 1000 / (nego_period);
4571 spd1 = 1000 % (nego_period);
4572 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
0c3de38f 4573 seq_printf(m, " %2i.%1i M %02i ", spd, spd1,
1da177e4
LT		 4574 (dcb->sync_offset & 0x0f));
4575 } else
91c40f24 4576 seq_puts(m, " ");
1da177e4
LT		 4577
4578 /* Add more info ... */
0c3de38f 4579 seq_printf(m, " %02i\n", dcb->max_command);
1da177e4
LT		 4580 dev++;
4581 }
4582
4583 if (timer_pending(&acb->waiting_timer))
91c40f24 4584 seq_puts(m, "Waiting queue timer running\n");
1da177e4 4585 else
f50332ff 4586 seq_putc(m, '\n');
1da177e4
LT		 4587
4588 list_for_each_entry(dcb, &acb->dcb_list, list) {
4589 struct ScsiReqBlk *srb;
4590 if (!list_empty(&dcb->srb_waiting_list))
0c3de38f 4591 seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
1da177e4
LT		 4592 dcb->target_id, dcb->target_lun,
4593 list_size(&dcb->srb_waiting_list));
4594 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
0c3de38f 4595 seq_printf(m, " %p", srb->cmd);
1da177e4 4596 if (!list_empty(&dcb->srb_going_list))
0c3de38f 4597 seq_printf(m, "\nDCB (%02i-%i): Going : %i:",
1da177e4
LT		 4598 dcb->target_id, dcb->target_lun,
4599 list_size(&dcb->srb_going_list));
4600 list_for_each_entry(srb, &dcb->srb_going_list, list)
0c3de38f 4601 seq_printf(m, " %p", srb->cmd);
1da177e4 4602 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
f50332ff 4603 seq_putc(m, '\n');
1da177e4
LT		 4604 }
4605
4606 if (debug_enabled(DBG_1)) {
0c3de38f 4607 seq_printf(m, "DCB list for ACB %p:\n", acb);
1da177e4 4608 list_for_each_entry(dcb, &acb->dcb_list, list) {
0c3de38f 4609 seq_printf(m, "%p -> ", dcb);
1da177e4 4610 }
91c40f24 4611 seq_puts(m, "END\n");
1da177e4
LT		 4612 }
4613
1da177e4 4614 DC395x_UNLOCK_IO(acb->scsi_host, flags);
d32812ae 4615 return 0;
1da177e4
LT		 4616}
4617
4618
4619static struct scsi_host_template dc395x_driver_template = {
4620 .module = THIS_MODULE,
4621 .proc_name = DC395X_NAME,
d32812ae 4622 .show_info = dc395x_show_info,
1da177e4
LT		 4623 .name = DC395X_BANNER " " DC395X_VERSION,
4624 .queuecommand = dc395x_queue_command,
4625 .bios_param = dc395x_bios_param,
4626 .slave_alloc = dc395x_slave_alloc,
4627 .slave_destroy = dc395x_slave_destroy,
4628 .can_queue = DC395x_MAX_CAN_QUEUE,
4629 .this_id = 7,
4630 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4631 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4632 .eh_abort_handler = dc395x_eh_abort,
4633 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4af14d11 4634 .dma_boundary = PAGE_SIZE - 1,
1da177e4
LT		 4635};
4636
4637
4638/**
4639 * banner_display - Display banner on first instance of driver
4640 * initialized.
4641 **/
4642static void banner_display(void)
4643{
4644 static int banner_done = 0;
4645 if (!banner_done)
4646 {
4647 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4648 banner_done = 1;
4649 }
4650}
4651
4652
4653/**
4654 * dc395x_init_one - Initialise a single instance of the adapter.
4655 *
4656 * The PCI layer will call this once for each instance of the adapter
4657 * that it finds in the system. The pci_dev strcuture indicates which
4658 * instance we are being called from.
4659 *
b595076a 4660 * @dev: The PCI device to initialize.
1da177e4
LT		 4661 * @id: Looks like a pointer to the entry in our pci device table
4662 * that was actually matched by the PCI subsystem.
4663 *
4664 * Returns 0 on success, or an error code (-ve) on failure.
4665 **/
6f039790 4666static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
1da177e4
LT		 4667{
4668 struct Scsi_Host *scsi_host = NULL;
4669 struct AdapterCtlBlk *acb = NULL;
4670 unsigned long io_port_base;
4671 unsigned int io_port_len;
4672 unsigned int irq;
4673
4674 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4675 banner_display();
4676
4677 if (pci_enable_device(dev))
4678 {
4679 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4680 return -ENODEV;
4681 }
4682 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4683 io_port_len = pci_resource_len(dev, 0);
4684 irq = dev->irq;
4685 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4686
4687 /* allocate scsi host information (includes out adapter) */
4688 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4689 sizeof(struct AdapterCtlBlk));
4690 if (!scsi_host) {
4691 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4692 goto fail;
4693 }
4694 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4695 acb->scsi_host = scsi_host;
4696 acb->dev = dev;
4697
4698 /* initialise the adapter and everything we need */
4699 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4700 dprintkl(KERN_INFO, "adapter init failed\n");
4701 goto fail;
4702 }
4703
4704 pci_set_master(dev);
4705
4706 /* get the scsi mid level to scan for new devices on the bus */
4707 if (scsi_add_host(scsi_host, &dev->dev)) {
4708 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4709 goto fail;
4710 }
4711 pci_set_drvdata(dev, scsi_host);
4712 scsi_scan_host(scsi_host);
4713
4714 return 0;
4715
4716fail:
4717 if (acb != NULL)
4718 adapter_uninit(acb);
4719 if (scsi_host != NULL)
4720 scsi_host_put(scsi_host);
4721 pci_disable_device(dev);
4722 return -ENODEV;
4723}
4724
4725
4726/**
4727 * dc395x_remove_one - Called to remove a single instance of the
4728 * adapter.
4729 *
b595076a 4730 * @dev: The PCI device to initialize.
1da177e4 4731 **/
6f039790 4732static void dc395x_remove_one(struct pci_dev *dev)
1da177e4
LT		 4733{
4734 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4735 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4736
4737 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4738
4739 scsi_remove_host(scsi_host);
4740 adapter_uninit(acb);
4741 pci_disable_device(dev);
4742 scsi_host_put(scsi_host);
1da177e4
LT		 4743}
4744
4745
4746static struct pci_device_id dc395x_pci_table[] = {
4747 {
4748 .vendor = PCI_VENDOR_ID_TEKRAM,
4749 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4750 .subvendor = PCI_ANY_ID,
4751 .subdevice = PCI_ANY_ID,
4752 },
4753 {} /* Terminating entry */
4754};
4755MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4756
4757
4758static struct pci_driver dc395x_driver = {
4759 .name = DC395X_NAME,
4760 .id_table = dc395x_pci_table,
4761 .probe = dc395x_init_one,
6f039790 4762 .remove = dc395x_remove_one,
1da177e4
LT		 4763};
4764
4765
4766/**
4767 * dc395x_module_init - Module initialization function
4768 *
4769 * Used by both module and built-in driver to initialise this driver.
4770 **/
4771static int __init dc395x_module_init(void)
4772{
dcbccbde 4773 return pci_register_driver(&dc395x_driver);
1da177e4
LT		 4774}
4775
4776
4777/**
4778 * dc395x_module_exit - Module cleanup function.
4779 **/
4780static void __exit dc395x_module_exit(void)
4781{
4782 pci_unregister_driver(&dc395x_driver);
4783}
4784
4785
4786module_init(dc395x_module_init);
4787module_exit(dc395x_module_exit);
4788
4789MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4790MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4791MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)