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 <[email protected]>
10 * Erich Chen <[email protected]>
11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
12 *
13 * Kurt Garloff <[email protected]>
14 * (C) 1999-2000 Kurt Garloff
15 *
16 * Oliver Neukum <[email protected]>
17 * Ali Akcaagac <[email protected]>
18 * Jamie Lenehan <[email protected]>
19 * (C) 2003
20 *
21 * License: GNU GPL
22 *
23 *************************************************************************
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. The name of the author may not be used to endorse or promote products
34 * derived from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 *
47 ************************************************************************
48 */
49 #include <linux/module.h>
50 #include <linux/moduleparam.h>
51 #include <linux/delay.h>
52 #include <linux/ctype.h>
53 #include <linux/blkdev.h>
54 #include <linux/interrupt.h>
55 #include <linux/init.h>
56 #include <linux/spinlock.h>
57 #include <linux/pci.h>
58 #include <linux/list.h>
59 #include <linux/vmalloc.h>
60 #include <linux/slab.h>
61 #include <asm/io.h>
62
63 #include <scsi/scsi.h>
64 #include <scsi/scsi_cmnd.h>
65 #include <scsi/scsi_device.h>
66 #include <scsi/scsi_host.h>
67 #include <scsi/scsi_transport_spi.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 #define TAG_NONE 255
164
165 /*
166 * srb->segement_x is the hw sg list. It is always allocated as a
167 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
168 * cross a page boundy.
169 */
170 #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
171
172
173 struct SGentry {
174 u32 address; /* bus! address */
175 u32 length;
176 };
177
178 /* The SEEPROM structure for TRM_S1040 */
179 struct NVRamTarget {
180 u8 cfg0; /* Target configuration byte 0 */
181 u8 period; /* Target period */
182 u8 cfg2; /* Target configuration byte 2 */
183 u8 cfg3; /* Target configuration byte 3 */
184 };
185
186 struct NvRamType {
187 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */
188 u8 sub_sys_id[2]; /* 2,3 Sub System ID */
189 u8 sub_class; /* 4 Sub Class */
190 u8 vendor_id[2]; /* 5,6 Vendor ID */
191 u8 device_id[2]; /* 7,8 Device ID */
192 u8 reserved; /* 9 Reserved */
193 struct NVRamTarget target[DC395x_MAX_SCSI_ID];
194 /** 10,11,12,13
195 ** 14,15,16,17
196 ** ....
197 ** ....
198 ** 70,71,72,73
199 */
200 u8 scsi_id; /* 74 Host Adapter SCSI ID */
201 u8 channel_cfg; /* 75 Channel configuration */
202 u8 delay_time; /* 76 Power on delay time */
203 u8 max_tag; /* 77 Maximum tags */
204 u8 reserved0; /* 78 */
205 u8 boot_target; /* 79 */
206 u8 boot_lun; /* 80 */
207 u8 reserved1; /* 81 */
208 u16 reserved2[22]; /* 82,..125 */
209 u16 cksum; /* 126,127 */
210 };
211
212 struct ScsiReqBlk {
213 struct list_head list; /* next/prev ptrs for srb lists */
214 struct DeviceCtlBlk *dcb;
215 struct scsi_cmnd *cmd;
216
217 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */
218 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */
219
220 u8 sg_count; /* No of HW sg entries for this request */
221 u8 sg_index; /* Index of HW sg entry for this request */
222 size_t total_xfer_length; /* Total number of bytes remaining to be transferred */
223 size_t request_length; /* Total number of bytes in this request */
224 /*
225 * The sense buffer handling function, request_sense, uses
226 * the first hw sg entry (segment_x[0]) and the transfer
227 * length (total_xfer_length). While doing this it stores the
228 * original values into the last sg hw list
229 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
230 * total_xfer_length in xferred. These values are restored in
231 * pci_unmap_srb_sense. This is the only place xferred is used.
232 */
233 size_t xferred; /* Saved copy of total_xfer_length */
234
235 u16 state;
236
237 u8 msgin_buf[6];
238 u8 msgout_buf[6];
239
240 u8 adapter_status;
241 u8 target_status;
242 u8 msg_count;
243 u8 end_message;
244
245 u8 tag_number;
246 u8 status;
247 u8 retry_count;
248 u8 flag;
249
250 u8 scsi_phase;
251 };
252
253 struct DeviceCtlBlk {
254 struct list_head list; /* next/prev ptrs for the dcb list */
255 struct AdapterCtlBlk *acb;
256 struct list_head srb_going_list; /* head of going srb list */
257 struct list_head srb_waiting_list; /* head of waiting srb list */
258
259 struct ScsiReqBlk *active_srb;
260 u32 tag_mask;
261
262 u16 max_command;
263
264 u8 target_id; /* SCSI Target ID (SCSI Only) */
265 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */
266 u8 identify_msg;
267 u8 dev_mode;
268
269 u8 inquiry7; /* To store Inquiry flags */
270 u8 sync_mode; /* 0:async mode */
271 u8 min_nego_period; /* for nego. */
272 u8 sync_period; /* for reg. */
273
274 u8 sync_offset; /* for reg. and nego.(low nibble) */
275 u8 flag;
276 u8 dev_type;
277 u8 init_tcq_flag;
278 };
279
280 struct AdapterCtlBlk {
281 struct Scsi_Host *scsi_host;
282
283 unsigned long io_port_base;
284 unsigned long io_port_len;
285
286 struct list_head dcb_list; /* head of going dcb list */
287 struct DeviceCtlBlk *dcb_run_robin;
288 struct DeviceCtlBlk *active_dcb;
289
290 struct list_head srb_free_list; /* head of free srb list */
291 struct ScsiReqBlk *tmp_srb;
292 struct timer_list waiting_timer;
293 struct timer_list selto_timer;
294
295 unsigned long last_reset;
296
297 u16 srb_count;
298
299 u8 sel_timeout;
300
301 unsigned int irq_level;
302 u8 tag_max_num;
303 u8 acb_flag;
304 u8 gmode2;
305
306 u8 config;
307 u8 lun_chk;
308 u8 scan_devices;
309 u8 hostid_bit;
310
311 u8 dcb_map[DC395x_MAX_SCSI_ID];
312 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
313
314 struct pci_dev *dev;
315
316 u8 msg_len;
317
318 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
319 struct ScsiReqBlk srb;
320
321 struct NvRamType eeprom; /* eeprom settings for this adapter */
322 };
323
324
325 /*---------------------------------------------------------------------------
326 Forward declarations
327 ---------------------------------------------------------------------------*/
328 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
329 u16 *pscsi_status);
330 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
331 u16 *pscsi_status);
332 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
333 u16 *pscsi_status);
334 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
335 u16 *pscsi_status);
336 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
337 u16 *pscsi_status);
338 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
339 u16 *pscsi_status);
340 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
341 u16 *pscsi_status);
342 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
343 u16 *pscsi_status);
344 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
345 u16 *pscsi_status);
346 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
347 u16 *pscsi_status);
348 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
349 u16 *pscsi_status);
350 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
351 u16 *pscsi_status);
352 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
353 u16 *pscsi_status);
354 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
355 u16 *pscsi_status);
356 static void set_basic_config(struct AdapterCtlBlk *acb);
357 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
358 struct ScsiReqBlk *srb);
359 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
360 static void data_io_transfer(struct AdapterCtlBlk *acb,
361 struct ScsiReqBlk *srb, u16 io_dir);
362 static void disconnect(struct AdapterCtlBlk *acb);
363 static void reselect(struct AdapterCtlBlk *acb);
364 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
365 struct ScsiReqBlk *srb);
366 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
367 struct ScsiReqBlk *srb);
368 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
369 struct ScsiReqBlk *srb);
370 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
371 struct scsi_cmnd *cmd, u8 force);
372 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
373 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
374 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
375 struct ScsiReqBlk *srb);
376 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
377 struct ScsiReqBlk *srb);
378 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
379 struct ScsiReqBlk *srb);
380 static void set_xfer_rate(struct AdapterCtlBlk *acb,
381 struct DeviceCtlBlk *dcb);
382 static void waiting_timeout(struct timer_list *t);
383
384
385 /*---------------------------------------------------------------------------
386 Static Data
387 ---------------------------------------------------------------------------*/
388 static u16 current_sync_offset = 0;
389
390 static void *dc395x_scsi_phase0[] = {
391 data_out_phase0,/* phase:0 */
392 data_in_phase0, /* phase:1 */
393 command_phase0, /* phase:2 */
394 status_phase0, /* phase:3 */
395 nop0, /* phase:4 PH_BUS_FREE .. initial phase */
396 nop0, /* phase:5 PH_BUS_FREE .. initial phase */
397 msgout_phase0, /* phase:6 */
398 msgin_phase0, /* phase:7 */
399 };
400
401 static void *dc395x_scsi_phase1[] = {
402 data_out_phase1,/* phase:0 */
403 data_in_phase1, /* phase:1 */
404 command_phase1, /* phase:2 */
405 status_phase1, /* phase:3 */
406 nop1, /* phase:4 PH_BUS_FREE .. initial phase */
407 nop1, /* phase:5 PH_BUS_FREE .. initial phase */
408 msgout_phase1, /* phase:6 */
409 msgin_phase1, /* phase:7 */
410 };
411
412 /*
413 *Fast20: 000 50ns, 20.0 MHz
414 * 001 75ns, 13.3 MHz
415 * 010 100ns, 10.0 MHz
416 * 011 125ns, 8.0 MHz
417 * 100 150ns, 6.6 MHz
418 * 101 175ns, 5.7 MHz
419 * 110 200ns, 5.0 MHz
420 * 111 250ns, 4.0 MHz
421 *
422 *Fast40(LVDS): 000 25ns, 40.0 MHz
423 * 001 50ns, 20.0 MHz
424 * 010 75ns, 13.3 MHz
425 * 011 100ns, 10.0 MHz
426 * 100 125ns, 8.0 MHz
427 * 101 150ns, 6.6 MHz
428 * 110 175ns, 5.7 MHz
429 * 111 200ns, 5.0 MHz
430 */
431 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
432
433 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
434 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
435 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
436
437
438 /*---------------------------------------------------------------------------
439 Configuration
440 ---------------------------------------------------------------------------*/
441 /*
442 * Module/boot parameters currently effect *all* instances of the
443 * card in the system.
444 */
445
446 /*
447 * Command line parameters are stored in a structure below.
448 * These are the index's into the structure for the various
449 * command line options.
450 */
451 #define CFG_ADAPTER_ID 0
452 #define CFG_MAX_SPEED 1
453 #define CFG_DEV_MODE 2
454 #define CFG_ADAPTER_MODE 3
455 #define CFG_TAGS 4
456 #define CFG_RESET_DELAY 5
457
458 #define CFG_NUM 6 /* number of configuration items */
459
460
461 /*
462 * Value used to indicate that a command line override
463 * hasn't been used to modify the value.
464 */
465 #define CFG_PARAM_UNSET -1
466
467
468 /*
469 * Hold command line parameters.
470 */
471 struct ParameterData {
472 int value; /* value of this setting */
473 int min; /* minimum value */
474 int max; /* maximum value */
475 int def; /* default value */
476 int safe; /* safe value */
477 };
478 static struct ParameterData cfg_data[] = {
479 { /* adapter id */
480 CFG_PARAM_UNSET,
481 0,
482 15,
483 7,
484 7
485 },
486 { /* max speed */
487 CFG_PARAM_UNSET,
488 0,
489 7,
490 1, /* 13.3Mhz */
491 4, /* 6.7Hmz */
492 },
493 { /* dev mode */
494 CFG_PARAM_UNSET,
495 0,
496 0x3f,
497 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
498 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
499 NTC_DO_SEND_START,
500 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
501 },
502 { /* adapter mode */
503 CFG_PARAM_UNSET,
504 0,
505 0x2f,
506 NAC_SCANLUN |
507 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
508 /*| NAC_ACTIVE_NEG*/,
509 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
510 },
511 { /* tags */
512 CFG_PARAM_UNSET,
513 0,
514 5,
515 3, /* 16 tags (??) */
516 2,
517 },
518 { /* reset delay */
519 CFG_PARAM_UNSET,
520 0,
521 180,
522 1, /* 1 second */
523 10, /* 10 seconds */
524 }
525 };
526
527
528 /*
529 * Safe settings. If set to zero the BIOS/default values with
530 * command line overrides will be used. If set to 1 then safe and
531 * slow settings will be used.
532 */
533 static bool use_safe_settings = 0;
534 module_param_named(safe, use_safe_settings, bool, 0);
535 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
536
537
538 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
539 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
540
541 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
542 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
543
544 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
545 MODULE_PARM_DESC(dev_mode, "Device mode.");
546
547 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
548 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
549
550 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
551 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
552
553 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
554 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
555
556
557 /**
558 * set_safe_settings - if the use_safe_settings option is set then
559 * set all values to the safe and slow values.
560 **/
set_safe_settings(void)561 static void set_safe_settings(void)
562 {
563 if (use_safe_settings)
564 {
565 int i;
566
567 dprintkl(KERN_INFO, "Using safe settings.\n");
568 for (i = 0; i < CFG_NUM; i++)
569 {
570 cfg_data[i].value = cfg_data[i].safe;
571 }
572 }
573 }
574
575
576 /**
577 * fix_settings - reset any boot parameters which are out of range
578 * back to the default values.
579 **/
fix_settings(void)580 static void fix_settings(void)
581 {
582 int i;
583
584 dprintkdbg(DBG_1,
585 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
586 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
587 cfg_data[CFG_ADAPTER_ID].value,
588 cfg_data[CFG_MAX_SPEED].value,
589 cfg_data[CFG_DEV_MODE].value,
590 cfg_data[CFG_ADAPTER_MODE].value,
591 cfg_data[CFG_TAGS].value,
592 cfg_data[CFG_RESET_DELAY].value);
593 for (i = 0; i < CFG_NUM; i++)
594 {
595 if (cfg_data[i].value < cfg_data[i].min
596 || cfg_data[i].value > cfg_data[i].max)
597 cfg_data[i].value = cfg_data[i].def;
598 }
599 }
600
601
602
603 /*
604 * Mapping from the eeprom delay index value (index into this array)
605 * to the number of actual seconds that the delay should be for.
606 */
607 static char eeprom_index_to_delay_map[] =
608 { 1, 3, 5, 10, 16, 30, 60, 120 };
609
610
611 /**
612 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
613 * into a number of seconds.
614 *
615 * @eeprom: The eeprom structure in which we find the delay index to map.
616 **/
eeprom_index_to_delay(struct NvRamType * eeprom)617 static void eeprom_index_to_delay(struct NvRamType *eeprom)
618 {
619 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
620 }
621
622
623 /**
624 * delay_to_eeprom_index - Take a delay in seconds and return the
625 * closest eeprom index which will delay for at least that amount of
626 * seconds.
627 *
628 * @delay: The delay, in seconds, to find the eeprom index for.
629 **/
delay_to_eeprom_index(int delay)630 static int delay_to_eeprom_index(int delay)
631 {
632 u8 idx = 0;
633 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
634 idx++;
635 return idx;
636 }
637
638
639 /**
640 * eeprom_override - Override the eeprom settings, in the provided
641 * eeprom structure, with values that have been set on the command
642 * line.
643 *
644 * @eeprom: The eeprom data to override with command line options.
645 **/
eeprom_override(struct NvRamType * eeprom)646 static void eeprom_override(struct NvRamType *eeprom)
647 {
648 u8 id;
649
650 /* Adapter Settings */
651 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
652 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
653
654 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
655 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
656
657 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
658 eeprom->delay_time = delay_to_eeprom_index(
659 cfg_data[CFG_RESET_DELAY].value);
660
661 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
662 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
663
664 /* Device Settings */
665 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
666 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
667 eeprom->target[id].cfg0 =
668 (u8)cfg_data[CFG_DEV_MODE].value;
669
670 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
671 eeprom->target[id].period =
672 (u8)cfg_data[CFG_MAX_SPEED].value;
673
674 }
675 }
676
677
678 /*---------------------------------------------------------------------------
679 ---------------------------------------------------------------------------*/
680
list_size(struct list_head * head)681 static unsigned int list_size(struct list_head *head)
682 {
683 unsigned int count = 0;
684 struct list_head *pos;
685 list_for_each(pos, head)
686 count++;
687 return count;
688 }
689
690
dcb_get_next(struct list_head * head,struct DeviceCtlBlk * pos)691 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
692 struct DeviceCtlBlk *pos)
693 {
694 int use_next = 0;
695 struct DeviceCtlBlk* next = NULL;
696 struct DeviceCtlBlk* i;
697
698 if (list_empty(head))
699 return NULL;
700
701 /* find supplied dcb and then select the next one */
702 list_for_each_entry(i, head, list)
703 if (use_next) {
704 next = i;
705 break;
706 } else if (i == pos) {
707 use_next = 1;
708 }
709 /* if no next one take the head one (ie, wraparound) */
710 if (!next)
711 list_for_each_entry(i, head, list) {
712 next = i;
713 break;
714 }
715
716 return next;
717 }
718
719
free_tag(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)720 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
721 {
722 if (srb->tag_number < 255) {
723 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
724 srb->tag_number = 255;
725 }
726 }
727
728
729 /* Find cmd in SRB list */
find_cmd(struct scsi_cmnd * cmd,struct list_head * head)730 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
731 struct list_head *head)
732 {
733 struct ScsiReqBlk *i;
734 list_for_each_entry(i, head, list)
735 if (i->cmd == cmd)
736 return i;
737 return NULL;
738 }
739
740 /* Sets the timer to wake us up */
waiting_set_timer(struct AdapterCtlBlk * acb,unsigned long to)741 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
742 {
743 if (timer_pending(&acb->waiting_timer))
744 return;
745 if (time_before(jiffies + to, acb->last_reset - HZ / 2))
746 acb->waiting_timer.expires =
747 acb->last_reset - HZ / 2 + 1;
748 else
749 acb->waiting_timer.expires = jiffies + to + 1;
750 add_timer(&acb->waiting_timer);
751 }
752
753
754 /* Send the next command from the waiting list to the bus */
waiting_process_next(struct AdapterCtlBlk * acb)755 static void waiting_process_next(struct AdapterCtlBlk *acb)
756 {
757 struct DeviceCtlBlk *start = NULL;
758 struct DeviceCtlBlk *pos;
759 struct DeviceCtlBlk *dcb;
760 struct ScsiReqBlk *srb;
761 struct list_head *dcb_list_head = &acb->dcb_list;
762
763 if (acb->active_dcb
764 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
765 return;
766
767 if (timer_pending(&acb->waiting_timer))
768 del_timer(&acb->waiting_timer);
769
770 if (list_empty(dcb_list_head))
771 return;
772
773 /*
774 * Find the starting dcb. Need to find it again in the list
775 * since the list may have changed since we set the ptr to it
776 */
777 list_for_each_entry(dcb, dcb_list_head, list)
778 if (dcb == acb->dcb_run_robin) {
779 start = dcb;
780 break;
781 }
782 if (!start) {
783 /* This can happen! */
784 start = list_entry(dcb_list_head->next, typeof(*start), list);
785 acb->dcb_run_robin = start;
786 }
787
788
789 /*
790 * Loop over the dcb, but we start somewhere (potentially) in
791 * the middle of the loop so we need to manully do this.
792 */
793 pos = start;
794 do {
795 struct list_head *waiting_list_head = &pos->srb_waiting_list;
796
797 /* Make sure, the next another device gets scheduled ... */
798 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
799 acb->dcb_run_robin);
800
801 if (list_empty(waiting_list_head) ||
802 pos->max_command <= list_size(&pos->srb_going_list)) {
803 /* move to next dcb */
804 pos = dcb_get_next(dcb_list_head, pos);
805 } else {
806 srb = list_entry(waiting_list_head->next,
807 struct ScsiReqBlk, list);
808
809 /* Try to send to the bus */
810 if (!start_scsi(acb, pos, srb))
811 list_move(&srb->list, &pos->srb_going_list);
812 else
813 waiting_set_timer(acb, HZ/50);
814 break;
815 }
816 } while (pos != start);
817 }
818
819
820 /* Wake up waiting queue */
waiting_timeout(struct timer_list * t)821 static void waiting_timeout(struct timer_list *t)
822 {
823 unsigned long flags;
824 struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);
825 dprintkdbg(DBG_1,
826 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
827 DC395x_LOCK_IO(acb->scsi_host, flags);
828 waiting_process_next(acb);
829 DC395x_UNLOCK_IO(acb->scsi_host, flags);
830 }
831
832
833 /* Get the DCB for a given ID/LUN combination */
find_dcb(struct AdapterCtlBlk * acb,u8 id,u8 lun)834 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
835 {
836 return acb->children[id][lun];
837 }
838
839
840 /* Send SCSI Request Block (srb) to adapter (acb) */
send_srb(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)841 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
842 {
843 struct DeviceCtlBlk *dcb = srb->dcb;
844
845 if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
846 acb->active_dcb ||
847 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
848 list_add_tail(&srb->list, &dcb->srb_waiting_list);
849 waiting_process_next(acb);
850 return;
851 }
852
853 if (!start_scsi(acb, dcb, srb)) {
854 list_add_tail(&srb->list, &dcb->srb_going_list);
855 } else {
856 list_add(&srb->list, &dcb->srb_waiting_list);
857 waiting_set_timer(acb, HZ / 50);
858 }
859 }
860
861 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
build_srb(struct scsi_cmnd * cmd,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)862 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
863 struct ScsiReqBlk *srb)
864 {
865 int nseg;
866 enum dma_data_direction dir = cmd->sc_data_direction;
867 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
868 cmd, dcb->target_id, dcb->target_lun);
869
870 srb->dcb = dcb;
871 srb->cmd = cmd;
872 srb->sg_count = 0;
873 srb->total_xfer_length = 0;
874 srb->sg_bus_addr = 0;
875 srb->sg_index = 0;
876 srb->adapter_status = 0;
877 srb->target_status = 0;
878 srb->msg_count = 0;
879 srb->status = 0;
880 srb->flag = 0;
881 srb->state = 0;
882 srb->retry_count = 0;
883 srb->tag_number = TAG_NONE;
884 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
885 srb->end_message = 0;
886
887 nseg = scsi_dma_map(cmd);
888 BUG_ON(nseg < 0);
889
890 if (dir == DMA_NONE || !nseg) {
891 dprintkdbg(DBG_0,
892 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
893 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
894 srb->segment_x[0].address);
895 } else {
896 int i;
897 u32 reqlen = scsi_bufflen(cmd);
898 struct scatterlist *sg;
899 struct SGentry *sgp = srb->segment_x;
900
901 srb->sg_count = nseg;
902
903 dprintkdbg(DBG_0,
904 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
905 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
906 srb->sg_count);
907
908 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
909 u32 busaddr = (u32)sg_dma_address(sg);
910 u32 seglen = (u32)sg->length;
911 sgp[i].address = busaddr;
912 sgp[i].length = seglen;
913 srb->total_xfer_length += seglen;
914 }
915 sgp += srb->sg_count - 1;
916
917 /*
918 * adjust last page if too big as it is allocated
919 * on even page boundaries
920 */
921 if (srb->total_xfer_length > reqlen) {
922 sgp->length -= (srb->total_xfer_length - reqlen);
923 srb->total_xfer_length = reqlen;
924 }
925
926 /* Fixup for WIDE padding - make sure length is even */
927 if (dcb->sync_period & WIDE_SYNC &&
928 srb->total_xfer_length % 2) {
929 srb->total_xfer_length++;
930 sgp->length++;
931 }
932
933 srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev,
934 srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE);
935
936 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
937 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
938 }
939
940 srb->request_length = srb->total_xfer_length;
941 }
942
943
944 /**
945 * dc395x_queue_command_lck - queue scsi command passed from the mid
946 * layer, invoke 'done' on completion
947 *
948 * @cmd: pointer to scsi command object
949 *
950 * Returns 1 if the adapter (host) is busy, else returns 0. One
951 * reason for an adapter to be busy is that the number
952 * of outstanding queued commands is already equal to
953 * struct Scsi_Host::can_queue .
954 *
955 * Required: if struct Scsi_Host::can_queue is ever non-zero
956 * then this function is required.
957 *
958 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
959 * and is expected to be held on return.
960 *
961 */
dc395x_queue_command_lck(struct scsi_cmnd * cmd)962 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd)
963 {
964 void (*done)(struct scsi_cmnd *) = scsi_done;
965 struct DeviceCtlBlk *dcb;
966 struct ScsiReqBlk *srb;
967 struct AdapterCtlBlk *acb =
968 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
969 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
970 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
971
972 /* Assume BAD_TARGET; will be cleared later */
973 set_host_byte(cmd, DID_BAD_TARGET);
974
975 /* ignore invalid targets */
976 if (cmd->device->id >= acb->scsi_host->max_id ||
977 cmd->device->lun >= acb->scsi_host->max_lun ||
978 cmd->device->lun >31) {
979 goto complete;
980 }
981
982 /* does the specified lun on the specified device exist */
983 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
984 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
985 cmd->device->id, (u8)cmd->device->lun);
986 goto complete;
987 }
988
989 /* do we have a DCB for the device */
990 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
991 if (!dcb) {
992 /* should never happen */
993 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
994 cmd->device->id, (u8)cmd->device->lun);
995 goto complete;
996 }
997
998 set_host_byte(cmd, DID_OK);
999 set_status_byte(cmd, SAM_STAT_GOOD);
1000
1001 srb = list_first_entry_or_null(&acb->srb_free_list,
1002 struct ScsiReqBlk, list);
1003 if (!srb) {
1004 /*
1005 * Return 1 since we are unable to queue this command at this
1006 * point in time.
1007 */
1008 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1009 return 1;
1010 }
1011 list_del(&srb->list);
1012
1013 build_srb(cmd, dcb, srb);
1014
1015 if (!list_empty(&dcb->srb_waiting_list)) {
1016 /* append to waiting queue */
1017 list_add_tail(&srb->list, &dcb->srb_waiting_list);
1018 waiting_process_next(acb);
1019 } else {
1020 /* process immediately */
1021 send_srb(acb, srb);
1022 }
1023 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1024 return 0;
1025
1026 complete:
1027 /*
1028 * Complete the command immediatey, and then return 0 to
1029 * indicate that we have handled the command. This is usually
1030 * done when the commad is for things like non existent
1031 * devices.
1032 */
1033 done(cmd);
1034 return 0;
1035 }
1036
DEF_SCSI_QCMD(dc395x_queue_command)1037 static DEF_SCSI_QCMD(dc395x_queue_command)
1038
1039 static void dump_register_info(struct AdapterCtlBlk *acb,
1040 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1041 {
1042 u16 pstat;
1043 struct pci_dev *dev = acb->dev;
1044 pci_read_config_word(dev, PCI_STATUS, &pstat);
1045 if (!dcb)
1046 dcb = acb->active_dcb;
1047 if (!srb && dcb)
1048 srb = dcb->active_srb;
1049 if (srb) {
1050 if (!srb->cmd)
1051 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1052 srb, srb->cmd);
1053 else
1054 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1055 "cmnd=0x%02x <%02i-%i>\n",
1056 srb, srb->cmd,
1057 srb->cmd->cmnd[0], srb->cmd->device->id,
1058 (u8)srb->cmd->device->lun);
1059 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1060 srb->segment_x, srb->sg_count, srb->sg_index,
1061 srb->total_xfer_length);
1062 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1063 srb->state, srb->status, srb->scsi_phase,
1064 (acb->active_dcb) ? "" : "not");
1065 }
1066 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1067 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1068 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1069 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1070 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1071 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1072 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1073 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1074 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1075 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1076 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1077 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1078 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1079 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1080 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1081 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1082 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1083 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1084 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1085 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1086 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1087 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1088 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1089 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1090 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1091 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1092 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1093 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1094 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1095 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1096 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1097 "pci{status=0x%04x}\n",
1098 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1099 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1100 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1101 pstat);
1102 }
1103
1104
clear_fifo(struct AdapterCtlBlk * acb,char * txt)1105 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1106 {
1107 #if debug_enabled(DBG_FIFO)
1108 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1109 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1110 if (!(fifocnt & 0x40))
1111 dprintkdbg(DBG_FIFO,
1112 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1113 fifocnt & 0x3f, lines, txt);
1114 #endif
1115 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1116 }
1117
1118
reset_dev_param(struct AdapterCtlBlk * acb)1119 static void reset_dev_param(struct AdapterCtlBlk *acb)
1120 {
1121 struct DeviceCtlBlk *dcb;
1122 struct NvRamType *eeprom = &acb->eeprom;
1123 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1124
1125 list_for_each_entry(dcb, &acb->dcb_list, list) {
1126 u8 period_index;
1127
1128 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1129 dcb->sync_period = 0;
1130 dcb->sync_offset = 0;
1131
1132 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1133 period_index = eeprom->target[dcb->target_id].period & 0x07;
1134 dcb->min_nego_period = clock_period[period_index];
1135 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1136 || !(acb->config & HCC_WIDE_CARD))
1137 dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1138 }
1139 }
1140
1141
1142 /*
1143 * perform a hard reset on the SCSI bus
1144 * @cmd - some command for this host (for fetching hooks)
1145 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1146 */
__dc395x_eh_bus_reset(struct scsi_cmnd * cmd)1147 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1148 {
1149 struct AdapterCtlBlk *acb =
1150 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1151 dprintkl(KERN_INFO,
1152 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1153 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1154
1155 if (timer_pending(&acb->waiting_timer))
1156 del_timer(&acb->waiting_timer);
1157
1158 /*
1159 * disable interrupt
1160 */
1161 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1162 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1163 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1164 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1165
1166 reset_scsi_bus(acb);
1167 udelay(500);
1168
1169 /* We may be in serious trouble. Wait some seconds */
1170 acb->last_reset =
1171 jiffies + 3 * HZ / 2 +
1172 HZ * acb->eeprom.delay_time;
1173
1174 /*
1175 * re-enable interrupt
1176 */
1177 /* Clear SCSI FIFO */
1178 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1179 clear_fifo(acb, "eh_bus_reset");
1180 /* Delete pending IRQ */
1181 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1182 set_basic_config(acb);
1183
1184 reset_dev_param(acb);
1185 doing_srb_done(acb, DID_RESET, cmd, 0);
1186 acb->active_dcb = NULL;
1187 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1188 waiting_process_next(acb);
1189
1190 return SUCCESS;
1191 }
1192
dc395x_eh_bus_reset(struct scsi_cmnd * cmd)1193 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1194 {
1195 int rc;
1196
1197 spin_lock_irq(cmd->device->host->host_lock);
1198 rc = __dc395x_eh_bus_reset(cmd);
1199 spin_unlock_irq(cmd->device->host->host_lock);
1200
1201 return rc;
1202 }
1203
1204 /*
1205 * abort an errant SCSI command
1206 * @cmd - command to be aborted
1207 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1208 */
dc395x_eh_abort(struct scsi_cmnd * cmd)1209 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1210 {
1211 /*
1212 * Look into our command queues: If it has not been sent already,
1213 * we remove it and return success. Otherwise fail.
1214 */
1215 struct AdapterCtlBlk *acb =
1216 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1217 struct DeviceCtlBlk *dcb;
1218 struct ScsiReqBlk *srb;
1219 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1220 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1221
1222 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1223 if (!dcb) {
1224 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1225 return FAILED;
1226 }
1227
1228 srb = find_cmd(cmd, &dcb->srb_waiting_list);
1229 if (srb) {
1230 list_del(&srb->list);
1231 pci_unmap_srb_sense(acb, srb);
1232 pci_unmap_srb(acb, srb);
1233 free_tag(dcb, srb);
1234 list_add_tail(&srb->list, &acb->srb_free_list);
1235 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1236 set_host_byte(cmd, DID_ABORT);
1237 return SUCCESS;
1238 }
1239 srb = find_cmd(cmd, &dcb->srb_going_list);
1240 if (srb) {
1241 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1242 /* XXX: Should abort the command here */
1243 } else {
1244 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1245 }
1246 return FAILED;
1247 }
1248
1249
1250 /* SDTR */
build_sdtr(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1251 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1252 struct ScsiReqBlk *srb)
1253 {
1254 u8 *ptr = srb->msgout_buf + srb->msg_count;
1255 if (srb->msg_count > 1) {
1256 dprintkl(KERN_INFO,
1257 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1258 srb->msg_count, srb->msgout_buf[0],
1259 srb->msgout_buf[1]);
1260 return;
1261 }
1262 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1263 dcb->sync_offset = 0;
1264 dcb->min_nego_period = 200 >> 2;
1265 } else if (dcb->sync_offset == 0)
1266 dcb->sync_offset = SYNC_NEGO_OFFSET;
1267
1268 srb->msg_count += spi_populate_sync_msg(ptr, dcb->min_nego_period,
1269 dcb->sync_offset);
1270 srb->state |= SRB_DO_SYNC_NEGO;
1271 }
1272
1273
1274 /* WDTR */
build_wdtr(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1275 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1276 struct ScsiReqBlk *srb)
1277 {
1278 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1279 (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1280 u8 *ptr = srb->msgout_buf + srb->msg_count;
1281 if (srb->msg_count > 1) {
1282 dprintkl(KERN_INFO,
1283 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1284 srb->msg_count, srb->msgout_buf[0],
1285 srb->msgout_buf[1]);
1286 return;
1287 }
1288 srb->msg_count += spi_populate_width_msg(ptr, wide);
1289 srb->state |= SRB_DO_WIDE_NEGO;
1290 }
1291
1292
1293 #if 0
1294 /* Timer to work around chip flaw: When selecting and the bus is
1295 * busy, we sometimes miss a Selection timeout IRQ */
1296 void selection_timeout_missed(unsigned long ptr);
1297 /* Sets the timer to wake us up */
1298 static void selto_timer(struct AdapterCtlBlk *acb)
1299 {
1300 if (timer_pending(&acb->selto_timer))
1301 return;
1302 acb->selto_timer.function = selection_timeout_missed;
1303 acb->selto_timer.data = (unsigned long) acb;
1304 if (time_before
1305 (jiffies + HZ, acb->last_reset + HZ / 2))
1306 acb->selto_timer.expires =
1307 acb->last_reset + HZ / 2 + 1;
1308 else
1309 acb->selto_timer.expires = jiffies + HZ + 1;
1310 add_timer(&acb->selto_timer);
1311 }
1312
1313
1314 void selection_timeout_missed(unsigned long ptr)
1315 {
1316 unsigned long flags;
1317 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1318 struct ScsiReqBlk *srb;
1319 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1320 if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1321 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1322 return;
1323 }
1324 DC395x_LOCK_IO(acb->scsi_host, flags);
1325 srb = acb->active_dcb->active_srb;
1326 disconnect(acb);
1327 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1328 }
1329 #endif
1330
1331
start_scsi(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1332 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1333 struct ScsiReqBlk* srb)
1334 {
1335 u16 __maybe_unused s_stat2, return_code;
1336 u8 s_stat, scsicommand, i, identify_message;
1337 u8 *ptr;
1338 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1339 dcb->target_id, dcb->target_lun, srb);
1340
1341 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1342
1343 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1344 s_stat2 = 0;
1345 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1346 #if 1
1347 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1348 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1349 s_stat, s_stat2);
1350 /*
1351 * Try anyway?
1352 *
1353 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1354 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1355 * (This is likely to be a bug in the hardware. Obviously, most people
1356 * only have one initiator per SCSI bus.)
1357 * Instead let this fail and have the timer make sure the command is
1358 * tried again after a short time
1359 */
1360 /*selto_timer (acb); */
1361 return 1;
1362 }
1363 #endif
1364 if (acb->active_dcb) {
1365 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1366 "command while another command (0x%p) is active.",
1367 srb->cmd,
1368 acb->active_dcb->active_srb ?
1369 acb->active_dcb->active_srb->cmd : NULL);
1370 return 1;
1371 }
1372 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1373 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1374 return 1;
1375 }
1376 /* Allow starting of SCSI commands half a second before we allow the mid-level
1377 * to queue them again after a reset */
1378 if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1379 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1380 return 1;
1381 }
1382
1383 /* Flush FIFO */
1384 clear_fifo(acb, "start_scsi");
1385 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1386 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1387 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1388 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1389 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1390
1391 identify_message = dcb->identify_msg;
1392 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1393 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1394 if (srb->flag & AUTO_REQSENSE)
1395 identify_message &= 0xBF;
1396
1397 if (((srb->cmd->cmnd[0] == INQUIRY)
1398 || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1399 || (srb->flag & AUTO_REQSENSE))
1400 && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1401 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1402 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1403 && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1404 && (dcb->target_lun == 0)) {
1405 srb->msgout_buf[0] = identify_message;
1406 srb->msg_count = 1;
1407 scsicommand = SCMD_SEL_ATNSTOP;
1408 srb->state = SRB_MSGOUT;
1409 #ifndef SYNC_FIRST
1410 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1411 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1412 build_wdtr(acb, dcb, srb);
1413 goto no_cmd;
1414 }
1415 #endif
1416 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1417 && dcb->inquiry7 & SCSI_INQ_SYNC) {
1418 build_sdtr(acb, dcb, srb);
1419 goto no_cmd;
1420 }
1421 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1422 && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1423 build_wdtr(acb, dcb, srb);
1424 goto no_cmd;
1425 }
1426 srb->msg_count = 0;
1427 }
1428 /* Send identify message */
1429 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1430
1431 scsicommand = SCMD_SEL_ATN;
1432 srb->state = SRB_START_;
1433 #ifndef DC395x_NO_TAGQ
1434 if ((dcb->sync_mode & EN_TAG_QUEUEING)
1435 && (identify_message & 0xC0)) {
1436 /* Send Tag message */
1437 u32 tag_mask = 1;
1438 u8 tag_number = 0;
1439 while (tag_mask & dcb->tag_mask
1440 && tag_number < dcb->max_command) {
1441 tag_mask = tag_mask << 1;
1442 tag_number++;
1443 }
1444 if (tag_number >= dcb->max_command) {
1445 dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1446 "Out of tags target=<%02i-%i>)\n",
1447 srb->cmd, srb->cmd->device->id,
1448 (u8)srb->cmd->device->lun);
1449 srb->state = SRB_READY;
1450 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1451 DO_HWRESELECT);
1452 return 1;
1453 }
1454 /* Send Tag id */
1455 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SIMPLE_QUEUE_TAG);
1456 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1457 dcb->tag_mask |= tag_mask;
1458 srb->tag_number = tag_number;
1459 scsicommand = SCMD_SEL_ATN3;
1460 srb->state = SRB_START_;
1461 }
1462 #endif
1463 /*polling:*/
1464 /* Send CDB ..command block ......... */
1465 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1466 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1467 srb->cmd->cmnd[0], srb->tag_number);
1468 if (srb->flag & AUTO_REQSENSE) {
1469 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1470 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1471 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1472 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1473 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1474 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1475 } else {
1476 ptr = (u8 *)srb->cmd->cmnd;
1477 for (i = 0; i < srb->cmd->cmd_len; i++)
1478 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1479 }
1480 no_cmd:
1481 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1482 DO_HWRESELECT | DO_DATALATCH);
1483 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1484 /*
1485 * If start_scsi return 1:
1486 * we caught an interrupt (must be reset or reselection ... )
1487 * : Let's process it first!
1488 */
1489 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1490 srb->cmd, dcb->target_id, dcb->target_lun);
1491 srb->state = SRB_READY;
1492 free_tag(dcb, srb);
1493 srb->msg_count = 0;
1494 return_code = 1;
1495 /* This IRQ should NOT get lost, as we did not acknowledge it */
1496 } else {
1497 /*
1498 * If start_scsi returns 0:
1499 * we know that the SCSI processor is free
1500 */
1501 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1502 dcb->active_srb = srb;
1503 acb->active_dcb = dcb;
1504 return_code = 0;
1505 /* it's important for atn stop */
1506 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1507 DO_DATALATCH | DO_HWRESELECT);
1508 /* SCSI command */
1509 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1510 }
1511 return return_code;
1512 }
1513
1514
1515 #define DC395x_ENABLE_MSGOUT \
1516 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1517 srb->state |= SRB_MSGOUT
1518
1519
1520 /* abort command */
enable_msgout_abort(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)1521 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1522 struct ScsiReqBlk *srb)
1523 {
1524 srb->msgout_buf[0] = ABORT;
1525 srb->msg_count = 1;
1526 DC395x_ENABLE_MSGOUT;
1527 srb->state &= ~SRB_MSGIN;
1528 srb->state |= SRB_MSGOUT;
1529 }
1530
1531
1532 /**
1533 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1534 * have been triggered for this card.
1535 *
1536 * @acb: a pointer to the adpter control block
1537 * @scsi_status: the status return when we checked the card
1538 **/
dc395x_handle_interrupt(struct AdapterCtlBlk * acb,u16 scsi_status)1539 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1540 u16 scsi_status)
1541 {
1542 struct DeviceCtlBlk *dcb;
1543 struct ScsiReqBlk *srb;
1544 u16 phase;
1545 u8 scsi_intstatus;
1546 unsigned long flags;
1547 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1548 u16 *);
1549
1550 DC395x_LOCK_IO(acb->scsi_host, flags);
1551
1552 /* This acknowledges the IRQ */
1553 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1554 if ((scsi_status & 0x2007) == 0x2002)
1555 dprintkl(KERN_DEBUG,
1556 "COP after COP completed? %04x\n", scsi_status);
1557 if (debug_enabled(DBG_KG)) {
1558 if (scsi_intstatus & INT_SELTIMEOUT)
1559 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1560 }
1561 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1562
1563 if (timer_pending(&acb->selto_timer))
1564 del_timer(&acb->selto_timer);
1565
1566 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1567 disconnect(acb); /* bus free interrupt */
1568 goto out_unlock;
1569 }
1570 if (scsi_intstatus & INT_RESELECTED) {
1571 reselect(acb);
1572 goto out_unlock;
1573 }
1574 if (scsi_intstatus & INT_SELECT) {
1575 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1576 goto out_unlock;
1577 }
1578 if (scsi_intstatus & INT_SCSIRESET) {
1579 scsi_reset_detect(acb);
1580 goto out_unlock;
1581 }
1582 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1583 dcb = acb->active_dcb;
1584 if (!dcb) {
1585 dprintkl(KERN_DEBUG,
1586 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1587 scsi_status, scsi_intstatus);
1588 goto out_unlock;
1589 }
1590 srb = dcb->active_srb;
1591 if (dcb->flag & ABORT_DEV_) {
1592 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1593 enable_msgout_abort(acb, srb);
1594 }
1595
1596 /* software sequential machine */
1597 phase = (u16)srb->scsi_phase;
1598
1599 /*
1600 * 62037 or 62137
1601 * call dc395x_scsi_phase0[]... "phase entry"
1602 * handle every phase before start transfer
1603 */
1604 /* data_out_phase0, phase:0 */
1605 /* data_in_phase0, phase:1 */
1606 /* command_phase0, phase:2 */
1607 /* status_phase0, phase:3 */
1608 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1609 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1610 /* msgout_phase0, phase:6 */
1611 /* msgin_phase0, phase:7 */
1612 dc395x_statev = dc395x_scsi_phase0[phase];
1613 dc395x_statev(acb, srb, &scsi_status);
1614
1615 /*
1616 * if there were any exception occurred scsi_status
1617 * will be modify to bus free phase new scsi_status
1618 * transfer out from ... previous dc395x_statev
1619 */
1620 srb->scsi_phase = scsi_status & PHASEMASK;
1621 phase = (u16)scsi_status & PHASEMASK;
1622
1623 /*
1624 * call dc395x_scsi_phase1[]... "phase entry" handle
1625 * every phase to do transfer
1626 */
1627 /* data_out_phase1, phase:0 */
1628 /* data_in_phase1, phase:1 */
1629 /* command_phase1, phase:2 */
1630 /* status_phase1, phase:3 */
1631 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1632 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1633 /* msgout_phase1, phase:6 */
1634 /* msgin_phase1, phase:7 */
1635 dc395x_statev = dc395x_scsi_phase1[phase];
1636 dc395x_statev(acb, srb, &scsi_status);
1637 }
1638 out_unlock:
1639 DC395x_UNLOCK_IO(acb->scsi_host, flags);
1640 }
1641
1642
dc395x_interrupt(int irq,void * dev_id)1643 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1644 {
1645 struct AdapterCtlBlk *acb = dev_id;
1646 u16 scsi_status;
1647 u8 dma_status;
1648 irqreturn_t handled = IRQ_NONE;
1649
1650 /*
1651 * Check for pending interrupt
1652 */
1653 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1654 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1655 if (scsi_status & SCSIINTERRUPT) {
1656 /* interrupt pending - let's process it! */
1657 dc395x_handle_interrupt(acb, scsi_status);
1658 handled = IRQ_HANDLED;
1659 }
1660 else if (dma_status & 0x20) {
1661 /* Error from the DMA engine */
1662 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1663 #if 0
1664 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1665 if (acb->active_dcb) {
1666 acb->active_dcb-> flag |= ABORT_DEV_;
1667 if (acb->active_dcb->active_srb)
1668 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1669 }
1670 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1671 #else
1672 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1673 acb = NULL;
1674 #endif
1675 handled = IRQ_HANDLED;
1676 }
1677
1678 return handled;
1679 }
1680
1681
msgout_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1682 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1683 u16 *pscsi_status)
1684 {
1685 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1686 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1687 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
1688
1689 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1690 srb->state &= ~SRB_MSGOUT;
1691 }
1692
1693
msgout_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1694 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1695 u16 *pscsi_status)
1696 {
1697 u16 i;
1698 u8 *ptr;
1699 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1700
1701 clear_fifo(acb, "msgout_phase1");
1702 if (!(srb->state & SRB_MSGOUT)) {
1703 srb->state |= SRB_MSGOUT;
1704 dprintkl(KERN_DEBUG,
1705 "msgout_phase1: (0x%p) Phase unexpected\n",
1706 srb->cmd); /* So what ? */
1707 }
1708 if (!srb->msg_count) {
1709 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1710 srb->cmd);
1711 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, NOP);
1712 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1713 /* it's important for atn stop */
1714 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1715 return;
1716 }
1717 ptr = (u8 *)srb->msgout_buf;
1718 for (i = 0; i < srb->msg_count; i++)
1719 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1720 srb->msg_count = 0;
1721 if (srb->msgout_buf[0] == ABORT_TASK_SET)
1722 srb->state = SRB_ABORT_SENT;
1723
1724 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1725 }
1726
1727
command_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1728 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1729 u16 *pscsi_status)
1730 {
1731 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1732 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1733 }
1734
1735
command_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1736 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1737 u16 *pscsi_status)
1738 {
1739 struct DeviceCtlBlk *dcb;
1740 u8 *ptr;
1741 u16 i;
1742 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1743
1744 clear_fifo(acb, "command_phase1");
1745 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1746 if (!(srb->flag & AUTO_REQSENSE)) {
1747 ptr = (u8 *)srb->cmd->cmnd;
1748 for (i = 0; i < srb->cmd->cmd_len; i++) {
1749 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1750 ptr++;
1751 }
1752 } else {
1753 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1754 dcb = acb->active_dcb;
1755 /* target id */
1756 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1757 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1758 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1759 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1760 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1761 }
1762 srb->state |= SRB_COMMAND;
1763 /* it's important for atn stop */
1764 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1765 /* SCSI command */
1766 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1767 }
1768
1769
1770 /*
1771 * Verify that the remaining space in the hw sg lists is the same as
1772 * the count of remaining bytes in srb->total_xfer_length
1773 */
sg_verify_length(struct ScsiReqBlk * srb)1774 static void sg_verify_length(struct ScsiReqBlk *srb)
1775 {
1776 if (debug_enabled(DBG_SG)) {
1777 unsigned len = 0;
1778 unsigned idx = srb->sg_index;
1779 struct SGentry *psge = srb->segment_x + idx;
1780 for (; idx < srb->sg_count; psge++, idx++)
1781 len += psge->length;
1782 if (len != srb->total_xfer_length)
1783 dprintkdbg(DBG_SG,
1784 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1785 srb->total_xfer_length, len);
1786 }
1787 }
1788
1789
1790 /*
1791 * Compute the next Scatter Gather list index and adjust its length
1792 * and address if necessary
1793 */
sg_update_list(struct ScsiReqBlk * srb,u32 left)1794 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1795 {
1796 u8 idx;
1797 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1798 struct SGentry *psge = srb->segment_x + srb->sg_index;
1799
1800 dprintkdbg(DBG_0,
1801 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1802 xferred, srb->total_xfer_length, left);
1803 if (xferred == 0) {
1804 /* nothing to update since we did not transfer any data */
1805 return;
1806 }
1807
1808 sg_verify_length(srb);
1809 srb->total_xfer_length = left; /* update remaining count */
1810 for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1811 if (xferred >= psge->length) {
1812 /* Complete SG entries done */
1813 xferred -= psge->length;
1814 } else {
1815 /* Partial SG entry done */
1816 dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev,
1817 srb->sg_bus_addr, SEGMENTX_LEN,
1818 DMA_TO_DEVICE);
1819 psge->length -= xferred;
1820 psge->address += xferred;
1821 srb->sg_index = idx;
1822 dma_sync_single_for_device(&srb->dcb->acb->dev->dev,
1823 srb->sg_bus_addr, SEGMENTX_LEN,
1824 DMA_TO_DEVICE);
1825 break;
1826 }
1827 psge++;
1828 }
1829 sg_verify_length(srb);
1830 }
1831
1832
1833 /*
1834 * We have transferred a single byte (PIO mode?) and need to update
1835 * the count of bytes remaining (total_xfer_length) and update the sg
1836 * entry to either point to next byte in the current sg entry, or of
1837 * already at the end to point to the start of the next sg entry
1838 */
sg_subtract_one(struct ScsiReqBlk * srb)1839 static void sg_subtract_one(struct ScsiReqBlk *srb)
1840 {
1841 sg_update_list(srb, srb->total_xfer_length - 1);
1842 }
1843
1844
1845 /*
1846 * cleanup_after_transfer
1847 *
1848 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
1849 * KG: Currently called from StatusPhase1 ()
1850 * Should probably also be called from other places
1851 * Best might be to call it in DataXXPhase0, if new phase will differ
1852 */
cleanup_after_transfer(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)1853 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
1854 struct ScsiReqBlk *srb)
1855 {
1856 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
1857 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
1858 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1859 clear_fifo(acb, "cleanup/in");
1860 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1861 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1862 } else { /* write */
1863 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1864 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1865 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1866 clear_fifo(acb, "cleanup/out");
1867 }
1868 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1869 }
1870
1871
1872 /*
1873 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
1874 * Seems to be needed for unknown reasons; could be a hardware bug :-(
1875 */
1876 #define DC395x_LASTPIO 4
1877
1878
data_out_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1879 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1880 u16 *pscsi_status)
1881 {
1882 struct DeviceCtlBlk *dcb = srb->dcb;
1883 u16 scsi_status = *pscsi_status;
1884 u32 d_left_counter = 0;
1885 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
1886 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1887
1888 /*
1889 * KG: We need to drain the buffers before we draw any conclusions!
1890 * This means telling the DMA to push the rest into SCSI, telling
1891 * SCSI to push the rest to the bus.
1892 * However, the device might have been the one to stop us (phase
1893 * change), and the data in transit just needs to be accounted so
1894 * it can be retransmitted.)
1895 */
1896 /*
1897 * KG: Stop DMA engine pushing more data into the SCSI FIFO
1898 * If we need more data, the DMA SG list will be freshly set up, anyway
1899 */
1900 dprintkdbg(DBG_PIO, "data_out_phase0: "
1901 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
1902 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
1903 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1904 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1905 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1906 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
1907 srb->total_xfer_length);
1908 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
1909
1910 if (!(srb->state & SRB_XFERPAD)) {
1911 if (scsi_status & PARITYERROR)
1912 srb->status |= PARITY_ERROR;
1913
1914 /*
1915 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
1916 * is the no of bytes it got from the DMA engine not the no it
1917 * transferred successfully to the device. (And the difference could
1918 * be as much as the FIFO size, I guess ...)
1919 */
1920 if (!(scsi_status & SCSIXFERDONE)) {
1921 /*
1922 * when data transfer from DMA FIFO to SCSI FIFO
1923 * if there was some data left in SCSI FIFO
1924 */
1925 d_left_counter =
1926 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
1927 0x1F);
1928 if (dcb->sync_period & WIDE_SYNC)
1929 d_left_counter <<= 1;
1930
1931 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
1932 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
1933 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
1934 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1935 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
1936 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1937 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1938 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1939 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1940 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
1941 }
1942 /*
1943 * calculate all the residue data that not yet tranfered
1944 * SCSI transfer counter + left in SCSI FIFO data
1945 *
1946 * .....TRM_S1040_SCSI_COUNTER (24bits)
1947 * The counter always decrement by one for every SCSI byte transfer.
1948 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
1949 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
1950 */
1951 if (srb->total_xfer_length > DC395x_LASTPIO)
1952 d_left_counter +=
1953 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
1954
1955 /* Is this a good idea? */
1956 /*clear_fifo(acb, "DOP1"); */
1957 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
1958 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
1959 && scsi_bufflen(srb->cmd) % 2) {
1960 d_left_counter = 0;
1961 dprintkl(KERN_INFO,
1962 "data_out_phase0: Discard 1 byte (0x%02x)\n",
1963 scsi_status);
1964 }
1965 /*
1966 * KG: Oops again. Same thinko as above: The SCSI might have been
1967 * faster than the DMA engine, so that it ran out of data.
1968 * In that case, we have to do just nothing!
1969 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
1970 */
1971 /*
1972 * KG: This is nonsense: We have been WRITING data to the bus
1973 * If the SCSI engine has no bytes left, how should the DMA engine?
1974 */
1975 if (d_left_counter == 0) {
1976 srb->total_xfer_length = 0;
1977 } else {
1978 /*
1979 * if transfer not yet complete
1980 * there were some data residue in SCSI FIFO or
1981 * SCSI transfer counter not empty
1982 */
1983 long oldxferred =
1984 srb->total_xfer_length - d_left_counter;
1985 const int diff =
1986 (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
1987 sg_update_list(srb, d_left_counter);
1988 /* KG: Most ugly hack! Apparently, this works around a chip bug */
1989 if ((srb->segment_x[srb->sg_index].length ==
1990 diff && scsi_sg_count(srb->cmd))
1991 || ((oldxferred & ~PAGE_MASK) ==
1992 (PAGE_SIZE - diff))
1993 ) {
1994 dprintkl(KERN_INFO, "data_out_phase0: "
1995 "Work around chip bug (%i)?\n", diff);
1996 d_left_counter =
1997 srb->total_xfer_length - diff;
1998 sg_update_list(srb, d_left_counter);
1999 /*srb->total_xfer_length -= diff; */
2000 /*srb->virt_addr += diff; */
2001 /*if (srb->cmd->use_sg) */
2002 /* srb->sg_index++; */
2003 }
2004 }
2005 }
2006 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2007 cleanup_after_transfer(acb, srb);
2008 }
2009 }
2010
2011
data_out_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2012 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2013 u16 *pscsi_status)
2014 {
2015 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2016 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2017 clear_fifo(acb, "data_out_phase1");
2018 /* do prepare before transfer when data out phase */
2019 data_io_transfer(acb, srb, XFERDATAOUT);
2020 }
2021
data_in_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2022 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2023 u16 *pscsi_status)
2024 {
2025 u16 scsi_status = *pscsi_status;
2026
2027 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2028 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2029
2030 /*
2031 * KG: DataIn is much more tricky than DataOut. When the device is finished
2032 * and switches to another phase, the SCSI engine should be finished too.
2033 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2034 * engine and transferred to memory.
2035 * We should wait for the FIFOs to be emptied by that (is there any way to
2036 * enforce this?) and then stop the DMA engine, because it might think, that
2037 * there are more bytes to follow. Yes, the device might disconnect prior to
2038 * having all bytes transferred!
2039 * Also we should make sure that all data from the DMA engine buffer's really
2040 * made its way to the system memory! Some documentation on this would not
2041 * seem to be a bad idea, actually.
2042 */
2043 if (!(srb->state & SRB_XFERPAD)) {
2044 u32 d_left_counter;
2045 unsigned int sc, fc;
2046
2047 if (scsi_status & PARITYERROR) {
2048 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2049 "Parity Error\n", srb->cmd);
2050 srb->status |= PARITY_ERROR;
2051 }
2052 /*
2053 * KG: We should wait for the DMA FIFO to be empty ...
2054 * but: it would be better to wait first for the SCSI FIFO and then the
2055 * the DMA FIFO to become empty? How do we know, that the device not already
2056 * sent data to the FIFO in a MsgIn phase, eg.?
2057 */
2058 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2059 #if 0
2060 int ctr = 6000000;
2061 dprintkl(KERN_DEBUG,
2062 "DIP0: Wait for DMA FIFO to flush ...\n");
2063 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2064 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2065 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2066 while (!
2067 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2068 0x80) && --ctr);
2069 if (ctr < 6000000 - 1)
2070 dprintkl(KERN_DEBUG
2071 "DIP0: Had to wait for DMA ...\n");
2072 if (!ctr)
2073 dprintkl(KERN_ERR,
2074 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2075 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2076 #endif
2077 dprintkdbg(DBG_KG, "data_in_phase0: "
2078 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2079 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2080 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2081 }
2082 /* Now: Check remainig data: The SCSI counters should tell us ... */
2083 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2084 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2085 d_left_counter = sc + ((fc & 0x1f)
2086 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2087 0));
2088 dprintkdbg(DBG_KG, "data_in_phase0: "
2089 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2090 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2091 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2092 fc,
2093 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2094 sc,
2095 fc,
2096 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2097 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2098 srb->total_xfer_length, d_left_counter);
2099 #if DC395x_LASTPIO
2100 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2101 if (d_left_counter
2102 && srb->total_xfer_length <= DC395x_LASTPIO) {
2103 size_t left_io = srb->total_xfer_length;
2104
2105 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2106 /*sg_update_list (srb, d_left_counter); */
2107 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2108 "for remaining %i bytes:",
2109 fc & 0x1f,
2110 (srb->dcb->sync_period & WIDE_SYNC) ?
2111 "words" : "bytes",
2112 srb->total_xfer_length);
2113 if (srb->dcb->sync_period & WIDE_SYNC)
2114 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2115 CFG2_WIDEFIFO);
2116 while (left_io) {
2117 unsigned char *virt, *base = NULL;
2118 unsigned long flags = 0;
2119 size_t len = left_io;
2120 size_t offset = srb->request_length - left_io;
2121
2122 local_irq_save(flags);
2123 /* Assumption: it's inside one page as it's at most 4 bytes and
2124 I just assume it's on a 4-byte boundary */
2125 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2126 srb->sg_count, &offset, &len);
2127 virt = base + offset;
2128
2129 left_io -= len;
2130
2131 while (len) {
2132 u8 byte;
2133 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2134 *virt++ = byte;
2135
2136 if (debug_enabled(DBG_PIO))
2137 printk(" %02x", byte);
2138
2139 d_left_counter--;
2140 sg_subtract_one(srb);
2141
2142 len--;
2143
2144 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2145
2146 if (fc == 0x40) {
2147 left_io = 0;
2148 break;
2149 }
2150 }
2151
2152 WARN_ON((fc != 0x40) == !d_left_counter);
2153
2154 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2155 /* Read the last byte ... */
2156 if (srb->total_xfer_length > 0) {
2157 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2158
2159 *virt++ = byte;
2160 srb->total_xfer_length--;
2161 if (debug_enabled(DBG_PIO))
2162 printk(" %02x", byte);
2163 }
2164
2165 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2166 }
2167
2168 scsi_kunmap_atomic_sg(base);
2169 local_irq_restore(flags);
2170 }
2171 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2172 /*srb->total_xfer_length = 0; */
2173 if (debug_enabled(DBG_PIO))
2174 printk("\n");
2175 }
2176 #endif /* DC395x_LASTPIO */
2177
2178 #if 0
2179 /*
2180 * KG: This was in DATAOUT. Does it also belong here?
2181 * Nobody seems to know what counter and fifo_cnt count exactly ...
2182 */
2183 if (!(scsi_status & SCSIXFERDONE)) {
2184 /*
2185 * when data transfer from DMA FIFO to SCSI FIFO
2186 * if there was some data left in SCSI FIFO
2187 */
2188 d_left_counter =
2189 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2190 0x1F);
2191 if (srb->dcb->sync_period & WIDE_SYNC)
2192 d_left_counter <<= 1;
2193 /*
2194 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2195 * so need to *= 2
2196 * KG: Seems to be correct ...
2197 */
2198 }
2199 #endif
2200 /* KG: This should not be needed any more! */
2201 if (d_left_counter == 0
2202 || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2203 #if 0
2204 int ctr = 6000000;
2205 u8 TempDMAstatus;
2206 do {
2207 TempDMAstatus =
2208 DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2209 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2210 if (!ctr)
2211 dprintkl(KERN_ERR,
2212 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2213 srb->total_xfer_length = 0;
2214 #endif
2215 srb->total_xfer_length = d_left_counter;
2216 } else { /* phase changed */
2217 /*
2218 * parsing the case:
2219 * when a transfer not yet complete
2220 * but be disconnected by target
2221 * if transfer not yet complete
2222 * there were some data residue in SCSI FIFO or
2223 * SCSI transfer counter not empty
2224 */
2225 sg_update_list(srb, d_left_counter);
2226 }
2227 }
2228 /* KG: The target may decide to disconnect: Empty FIFO before! */
2229 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2230 cleanup_after_transfer(acb, srb);
2231 }
2232 }
2233
2234
data_in_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2235 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2236 u16 *pscsi_status)
2237 {
2238 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2239 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2240 data_io_transfer(acb, srb, XFERDATAIN);
2241 }
2242
2243
data_io_transfer(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 io_dir)2244 static void data_io_transfer(struct AdapterCtlBlk *acb,
2245 struct ScsiReqBlk *srb, u16 io_dir)
2246 {
2247 struct DeviceCtlBlk *dcb = srb->dcb;
2248 u8 bval;
2249 dprintkdbg(DBG_0,
2250 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2251 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2252 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2253 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2254 if (srb == acb->tmp_srb)
2255 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2256 if (srb->sg_index >= srb->sg_count) {
2257 /* can't happen? out of bounds error */
2258 return;
2259 }
2260
2261 if (srb->total_xfer_length > DC395x_LASTPIO) {
2262 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2263 /*
2264 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2265 * Maybe, even ABORTXFER would be appropriate
2266 */
2267 if (dma_status & XFERPENDING) {
2268 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2269 "Expect trouble!\n");
2270 dump_register_info(acb, dcb, srb);
2271 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2272 }
2273 /* clear_fifo(acb, "IO"); */
2274 /*
2275 * load what physical address of Scatter/Gather list table
2276 * want to be transfer
2277 */
2278 srb->state |= SRB_DATA_XFER;
2279 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2280 if (scsi_sg_count(srb->cmd)) { /* with S/G */
2281 io_dir |= DMACMD_SG;
2282 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2283 srb->sg_bus_addr +
2284 sizeof(struct SGentry) *
2285 srb->sg_index);
2286 /* load how many bytes in the sg list table */
2287 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2288 ((u32)(srb->sg_count -
2289 srb->sg_index) << 3));
2290 } else { /* without S/G */
2291 io_dir &= ~DMACMD_SG;
2292 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2293 srb->segment_x[0].address);
2294 DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2295 srb->segment_x[0].length);
2296 }
2297 /* load total transfer length (24bits) max value 16Mbyte */
2298 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2299 srb->total_xfer_length);
2300 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2301 if (io_dir & DMACMD_DIR) { /* read */
2302 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2303 SCMD_DMA_IN);
2304 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2305 } else {
2306 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2307 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2308 SCMD_DMA_OUT);
2309 }
2310
2311 }
2312 #if DC395x_LASTPIO
2313 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2314 /*
2315 * load what physical address of Scatter/Gather list table
2316 * want to be transfer
2317 */
2318 srb->state |= SRB_DATA_XFER;
2319 /* load total transfer length (24bits) max value 16Mbyte */
2320 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2321 srb->total_xfer_length);
2322 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2323 if (io_dir & DMACMD_DIR) { /* read */
2324 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2325 SCMD_FIFO_IN);
2326 } else { /* write */
2327 int ln = srb->total_xfer_length;
2328 size_t left_io = srb->total_xfer_length;
2329
2330 if (srb->dcb->sync_period & WIDE_SYNC)
2331 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2332 CFG2_WIDEFIFO);
2333
2334 while (left_io) {
2335 unsigned char *virt, *base = NULL;
2336 unsigned long flags = 0;
2337 size_t len = left_io;
2338 size_t offset = srb->request_length - left_io;
2339
2340 local_irq_save(flags);
2341 /* Again, max 4 bytes */
2342 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2343 srb->sg_count, &offset, &len);
2344 virt = base + offset;
2345
2346 left_io -= len;
2347
2348 while (len--) {
2349 if (debug_enabled(DBG_PIO))
2350 printk(" %02x", *virt);
2351
2352 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2353
2354 sg_subtract_one(srb);
2355 }
2356
2357 scsi_kunmap_atomic_sg(base);
2358 local_irq_restore(flags);
2359 }
2360 if (srb->dcb->sync_period & WIDE_SYNC) {
2361 if (ln % 2) {
2362 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2363 if (debug_enabled(DBG_PIO))
2364 printk(" |00");
2365 }
2366 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2367 }
2368 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2369 if (debug_enabled(DBG_PIO))
2370 printk("\n");
2371 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2372 SCMD_FIFO_OUT);
2373 }
2374 }
2375 #endif /* DC395x_LASTPIO */
2376 else { /* xfer pad */
2377 if (srb->sg_count) {
2378 srb->adapter_status = H_OVER_UNDER_RUN;
2379 srb->status |= OVER_RUN;
2380 }
2381 /*
2382 * KG: despite the fact that we are using 16 bits I/O ops
2383 * the SCSI FIFO is only 8 bits according to the docs
2384 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2385 */
2386 if (dcb->sync_period & WIDE_SYNC) {
2387 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2388 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2389 CFG2_WIDEFIFO);
2390 if (io_dir & DMACMD_DIR) {
2391 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2392 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2393 } else {
2394 /* Danger, Robinson: If you find KGs
2395 * scattered over the wide disk, the driver
2396 * or chip is to blame :-( */
2397 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2398 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2399 }
2400 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2401 } else {
2402 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2403 /* Danger, Robinson: If you find a collection of Ks on your disk
2404 * something broke :-( */
2405 if (io_dir & DMACMD_DIR)
2406 DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2407 else
2408 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2409 }
2410 srb->state |= SRB_XFERPAD;
2411 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2412 /* SCSI command */
2413 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2414 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2415 }
2416 }
2417
2418
status_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2419 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2420 u16 *pscsi_status)
2421 {
2422 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2423 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2424 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2425 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2426 srb->state = SRB_COMPLETED;
2427 *pscsi_status = PH_BUS_FREE; /*.. initial phase */
2428 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2429 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2430 }
2431
2432
status_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2433 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2434 u16 *pscsi_status)
2435 {
2436 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2437 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2438 srb->state = SRB_STATUS;
2439 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2440 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2441 }
2442
2443
2444 /* Check if the message is complete */
msgin_completed(u8 * msgbuf,u32 len)2445 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2446 {
2447 if (*msgbuf == EXTENDED_MESSAGE) {
2448 if (len < 2)
2449 return 0;
2450 if (len < msgbuf[1] + 2)
2451 return 0;
2452 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2453 if (len < 2)
2454 return 0;
2455 return 1;
2456 }
2457
2458 /* reject_msg */
msgin_reject(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2459 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2460 struct ScsiReqBlk *srb)
2461 {
2462 srb->msgout_buf[0] = MESSAGE_REJECT;
2463 srb->msg_count = 1;
2464 DC395x_ENABLE_MSGOUT;
2465 srb->state &= ~SRB_MSGIN;
2466 srb->state |= SRB_MSGOUT;
2467 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2468 srb->msgin_buf[0],
2469 srb->dcb->target_id, srb->dcb->target_lun);
2470 }
2471
2472
msgin_qtag(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,u8 tag)2473 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2474 struct DeviceCtlBlk *dcb, u8 tag)
2475 {
2476 struct ScsiReqBlk *srb = NULL;
2477 struct ScsiReqBlk *i;
2478 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2479 srb->cmd, tag, srb);
2480
2481 if (!(dcb->tag_mask & (1 << tag)))
2482 dprintkl(KERN_DEBUG,
2483 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2484 dcb->tag_mask, tag);
2485
2486 if (list_empty(&dcb->srb_going_list))
2487 goto mingx0;
2488 list_for_each_entry(i, &dcb->srb_going_list, list) {
2489 if (i->tag_number == tag) {
2490 srb = i;
2491 break;
2492 }
2493 }
2494 if (!srb)
2495 goto mingx0;
2496
2497 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2498 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2499 if (dcb->flag & ABORT_DEV_) {
2500 /*srb->state = SRB_ABORT_SENT; */
2501 enable_msgout_abort(acb, srb);
2502 }
2503
2504 if (!(srb->state & SRB_DISCONNECT))
2505 goto mingx0;
2506
2507 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2508 srb->state |= dcb->active_srb->state;
2509 srb->state |= SRB_DATA_XFER;
2510 dcb->active_srb = srb;
2511 /* How can we make the DORS happy? */
2512 return srb;
2513
2514 mingx0:
2515 srb = acb->tmp_srb;
2516 srb->state = SRB_UNEXPECT_RESEL;
2517 dcb->active_srb = srb;
2518 srb->msgout_buf[0] = ABORT_TASK;
2519 srb->msg_count = 1;
2520 DC395x_ENABLE_MSGOUT;
2521 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2522 return srb;
2523 }
2524
2525
reprogram_regs(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)2526 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2527 struct DeviceCtlBlk *dcb)
2528 {
2529 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2530 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2531 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2532 set_xfer_rate(acb, dcb);
2533 }
2534
2535
2536 /* set async transfer mode */
msgin_set_async(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2537 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2538 {
2539 struct DeviceCtlBlk *dcb = srb->dcb;
2540 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2541 dcb->target_id, dcb->target_lun);
2542
2543 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2544 dcb->sync_mode |= SYNC_NEGO_DONE;
2545 /*dcb->sync_period &= 0; */
2546 dcb->sync_offset = 0;
2547 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2548 srb->state &= ~SRB_DO_SYNC_NEGO;
2549 reprogram_regs(acb, dcb);
2550 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2551 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2552 build_wdtr(acb, dcb, srb);
2553 DC395x_ENABLE_MSGOUT;
2554 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2555 }
2556 }
2557
2558
2559 /* set sync transfer mode */
msgin_set_sync(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2560 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2561 {
2562 struct DeviceCtlBlk *dcb = srb->dcb;
2563 u8 bval;
2564 int fact;
2565 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2566 "(%02i.%01i MHz) Offset %i\n",
2567 dcb->target_id, srb->msgin_buf[3] << 2,
2568 (250 / srb->msgin_buf[3]),
2569 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2570 srb->msgin_buf[4]);
2571
2572 if (srb->msgin_buf[4] > 15)
2573 srb->msgin_buf[4] = 15;
2574 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2575 dcb->sync_offset = 0;
2576 else if (dcb->sync_offset == 0)
2577 dcb->sync_offset = srb->msgin_buf[4];
2578 if (srb->msgin_buf[4] > dcb->sync_offset)
2579 srb->msgin_buf[4] = dcb->sync_offset;
2580 else
2581 dcb->sync_offset = srb->msgin_buf[4];
2582 bval = 0;
2583 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2584 || dcb->min_nego_period >
2585 clock_period[bval]))
2586 bval++;
2587 if (srb->msgin_buf[3] < clock_period[bval])
2588 dprintkl(KERN_INFO,
2589 "msgin_set_sync: Increase sync nego period to %ins\n",
2590 clock_period[bval] << 2);
2591 srb->msgin_buf[3] = clock_period[bval];
2592 dcb->sync_period &= 0xf0;
2593 dcb->sync_period |= ALT_SYNC | bval;
2594 dcb->min_nego_period = srb->msgin_buf[3];
2595
2596 if (dcb->sync_period & WIDE_SYNC)
2597 fact = 500;
2598 else
2599 fact = 250;
2600
2601 dprintkl(KERN_INFO,
2602 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2603 dcb->target_id, (fact == 500) ? "Wide16" : "",
2604 dcb->min_nego_period << 2, dcb->sync_offset,
2605 (fact / dcb->min_nego_period),
2606 ((fact % dcb->min_nego_period) * 10 +
2607 dcb->min_nego_period / 2) / dcb->min_nego_period);
2608
2609 if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2610 /* Reply with corrected SDTR Message */
2611 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2612 srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2613
2614 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2615 srb->msg_count = 5;
2616 DC395x_ENABLE_MSGOUT;
2617 dcb->sync_mode |= SYNC_NEGO_DONE;
2618 } else {
2619 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2620 && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2621 build_wdtr(acb, dcb, srb);
2622 DC395x_ENABLE_MSGOUT;
2623 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2624 }
2625 }
2626 srb->state &= ~SRB_DO_SYNC_NEGO;
2627 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2628
2629 reprogram_regs(acb, dcb);
2630 }
2631
2632
msgin_set_nowide(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2633 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2634 struct ScsiReqBlk *srb)
2635 {
2636 struct DeviceCtlBlk *dcb = srb->dcb;
2637 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2638
2639 dcb->sync_period &= ~WIDE_SYNC;
2640 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2641 dcb->sync_mode |= WIDE_NEGO_DONE;
2642 srb->state &= ~SRB_DO_WIDE_NEGO;
2643 reprogram_regs(acb, dcb);
2644 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2645 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2646 build_sdtr(acb, dcb, srb);
2647 DC395x_ENABLE_MSGOUT;
2648 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2649 }
2650 }
2651
msgin_set_wide(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2652 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2653 {
2654 struct DeviceCtlBlk *dcb = srb->dcb;
2655 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2656 && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2657 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2658
2659 if (srb->msgin_buf[3] > wide)
2660 srb->msgin_buf[3] = wide;
2661 /* Completed */
2662 if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2663 dprintkl(KERN_DEBUG,
2664 "msgin_set_wide: Wide nego initiated <%02i>\n",
2665 dcb->target_id);
2666 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2667 srb->msg_count = 4;
2668 srb->state |= SRB_DO_WIDE_NEGO;
2669 DC395x_ENABLE_MSGOUT;
2670 }
2671
2672 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2673 if (srb->msgin_buf[3] > 0)
2674 dcb->sync_period |= WIDE_SYNC;
2675 else
2676 dcb->sync_period &= ~WIDE_SYNC;
2677 srb->state &= ~SRB_DO_WIDE_NEGO;
2678 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2679 dprintkdbg(DBG_1,
2680 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2681 (8 << srb->msgin_buf[3]), dcb->target_id);
2682 reprogram_regs(acb, dcb);
2683 if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2684 && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2685 build_sdtr(acb, dcb, srb);
2686 DC395x_ENABLE_MSGOUT;
2687 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2688 }
2689 }
2690
2691
2692 /*
2693 * extended message codes:
2694 *
2695 * code description
2696 *
2697 * 02h Reserved
2698 * 00h MODIFY DATA POINTER
2699 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2700 * 03h WIDE DATA TRANSFER REQUEST
2701 * 04h - 7Fh Reserved
2702 * 80h - FFh Vendor specific
2703 */
msgin_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2704 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2705 u16 *pscsi_status)
2706 {
2707 struct DeviceCtlBlk *dcb = acb->active_dcb;
2708 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2709
2710 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2711 if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2712 /* Now eval the msg */
2713 switch (srb->msgin_buf[0]) {
2714 case DISCONNECT:
2715 srb->state = SRB_DISCONNECT;
2716 break;
2717
2718 case SIMPLE_QUEUE_TAG:
2719 case HEAD_OF_QUEUE_TAG:
2720 case ORDERED_QUEUE_TAG:
2721 srb =
2722 msgin_qtag(acb, dcb,
2723 srb->msgin_buf[1]);
2724 break;
2725
2726 case MESSAGE_REJECT:
2727 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2728 DO_CLRATN | DO_DATALATCH);
2729 /* A sync nego message was rejected ! */
2730 if (srb->state & SRB_DO_SYNC_NEGO) {
2731 msgin_set_async(acb, srb);
2732 break;
2733 }
2734 /* A wide nego message was rejected ! */
2735 if (srb->state & SRB_DO_WIDE_NEGO) {
2736 msgin_set_nowide(acb, srb);
2737 break;
2738 }
2739 enable_msgout_abort(acb, srb);
2740 /*srb->state |= SRB_ABORT_SENT */
2741 break;
2742
2743 case EXTENDED_MESSAGE:
2744 /* SDTR */
2745 if (srb->msgin_buf[1] == 3
2746 && srb->msgin_buf[2] == EXTENDED_SDTR) {
2747 msgin_set_sync(acb, srb);
2748 break;
2749 }
2750 /* WDTR */
2751 if (srb->msgin_buf[1] == 2
2752 && srb->msgin_buf[2] == EXTENDED_WDTR
2753 && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2754 msgin_set_wide(acb, srb);
2755 break;
2756 }
2757 msgin_reject(acb, srb);
2758 break;
2759
2760 case IGNORE_WIDE_RESIDUE:
2761 /* Discard wide residual */
2762 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2763 break;
2764
2765 case COMMAND_COMPLETE:
2766 /* nothing has to be done */
2767 break;
2768
2769 case SAVE_POINTERS:
2770 /*
2771 * SAVE POINTER may be ignored as we have the struct
2772 * ScsiReqBlk* associated with the scsi command.
2773 */
2774 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2775 "SAVE POINTER rem=%i Ignore\n",
2776 srb->cmd, srb->total_xfer_length);
2777 break;
2778
2779 case RESTORE_POINTERS:
2780 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2781 break;
2782
2783 case ABORT:
2784 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2785 "<%02i-%i> ABORT msg\n",
2786 srb->cmd, dcb->target_id,
2787 dcb->target_lun);
2788 dcb->flag |= ABORT_DEV_;
2789 enable_msgout_abort(acb, srb);
2790 break;
2791
2792 default:
2793 /* reject unknown messages */
2794 if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2795 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2796 srb->msg_count = 1;
2797 srb->msgout_buf[0] = dcb->identify_msg;
2798 DC395x_ENABLE_MSGOUT;
2799 srb->state |= SRB_MSGOUT;
2800 /*break; */
2801 }
2802 msgin_reject(acb, srb);
2803 }
2804
2805 /* Clear counter and MsgIn state */
2806 srb->state &= ~SRB_MSGIN;
2807 acb->msg_len = 0;
2808 }
2809 *pscsi_status = PH_BUS_FREE;
2810 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2811 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2812 }
2813
2814
msgin_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2815 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2816 u16 *pscsi_status)
2817 {
2818 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2819 clear_fifo(acb, "msgin_phase1");
2820 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2821 if (!(srb->state & SRB_MSGIN)) {
2822 srb->state &= ~SRB_DISCONNECT;
2823 srb->state |= SRB_MSGIN;
2824 }
2825 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2826 /* SCSI command */
2827 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2828 }
2829
2830
nop0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2831 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2832 u16 *pscsi_status)
2833 {
2834 }
2835
2836
nop1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2837 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2838 u16 *pscsi_status)
2839 {
2840 }
2841
2842
set_xfer_rate(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)2843 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
2844 {
2845 struct DeviceCtlBlk *i;
2846
2847 /* set all lun device's period, offset */
2848 if (dcb->identify_msg & 0x07)
2849 return;
2850
2851 if (acb->scan_devices) {
2852 current_sync_offset = dcb->sync_offset;
2853 return;
2854 }
2855
2856 list_for_each_entry(i, &acb->dcb_list, list)
2857 if (i->target_id == dcb->target_id) {
2858 i->sync_period = dcb->sync_period;
2859 i->sync_offset = dcb->sync_offset;
2860 i->sync_mode = dcb->sync_mode;
2861 i->min_nego_period = dcb->min_nego_period;
2862 }
2863 }
2864
2865
disconnect(struct AdapterCtlBlk * acb)2866 static void disconnect(struct AdapterCtlBlk *acb)
2867 {
2868 struct DeviceCtlBlk *dcb = acb->active_dcb;
2869 struct ScsiReqBlk *srb;
2870
2871 if (!dcb) {
2872 dprintkl(KERN_ERR, "disconnect: No such device\n");
2873 udelay(500);
2874 /* Suspend queue for a while */
2875 acb->last_reset =
2876 jiffies + HZ / 2 +
2877 HZ * acb->eeprom.delay_time;
2878 clear_fifo(acb, "disconnectEx");
2879 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2880 return;
2881 }
2882 srb = dcb->active_srb;
2883 acb->active_dcb = NULL;
2884 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
2885
2886 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
2887 clear_fifo(acb, "disconnect");
2888 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2889 if (srb->state & SRB_UNEXPECT_RESEL) {
2890 dprintkl(KERN_ERR,
2891 "disconnect: Unexpected reselection <%02i-%i>\n",
2892 dcb->target_id, dcb->target_lun);
2893 srb->state = 0;
2894 waiting_process_next(acb);
2895 } else if (srb->state & SRB_ABORT_SENT) {
2896 dcb->flag &= ~ABORT_DEV_;
2897 acb->last_reset = jiffies + HZ / 2 + 1;
2898 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
2899 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
2900 waiting_process_next(acb);
2901 } else {
2902 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
2903 || !(srb->
2904 state & (SRB_DISCONNECT | SRB_COMPLETED))) {
2905 /*
2906 * Selection time out
2907 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
2908 */
2909 /* Unexp. Disc / Sel Timeout */
2910 if (srb->state != SRB_START_
2911 && srb->state != SRB_MSGOUT) {
2912 srb->state = SRB_READY;
2913 dprintkl(KERN_DEBUG,
2914 "disconnect: (0x%p) Unexpected\n",
2915 srb->cmd);
2916 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
2917 goto disc1;
2918 } else {
2919 /* Normal selection timeout */
2920 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
2921 "<%02i-%i> SelTO\n", srb->cmd,
2922 dcb->target_id, dcb->target_lun);
2923 if (srb->retry_count++ > DC395x_MAX_RETRIES
2924 || acb->scan_devices) {
2925 srb->target_status =
2926 SCSI_STAT_SEL_TIMEOUT;
2927 goto disc1;
2928 }
2929 free_tag(dcb, srb);
2930 list_move(&srb->list, &dcb->srb_waiting_list);
2931 dprintkdbg(DBG_KG,
2932 "disconnect: (0x%p) Retry\n",
2933 srb->cmd);
2934 waiting_set_timer(acb, HZ / 20);
2935 }
2936 } else if (srb->state & SRB_DISCONNECT) {
2937 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
2938 /*
2939 * SRB_DISCONNECT (This is what we expect!)
2940 */
2941 if (bval & 0x40) {
2942 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
2943 " 0x%02x: ACK set! Other controllers?\n",
2944 bval);
2945 /* It could come from another initiator, therefore don't do much ! */
2946 } else
2947 waiting_process_next(acb);
2948 } else if (srb->state & SRB_COMPLETED) {
2949 disc1:
2950 /*
2951 ** SRB_COMPLETED
2952 */
2953 free_tag(dcb, srb);
2954 dcb->active_srb = NULL;
2955 srb->state = SRB_FREE;
2956 srb_done(acb, dcb, srb);
2957 }
2958 }
2959 }
2960
2961
reselect(struct AdapterCtlBlk * acb)2962 static void reselect(struct AdapterCtlBlk *acb)
2963 {
2964 struct DeviceCtlBlk *dcb = acb->active_dcb;
2965 struct ScsiReqBlk *srb = NULL;
2966 u16 rsel_tar_lun_id;
2967 u8 id, lun;
2968 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
2969
2970 clear_fifo(acb, "reselect");
2971 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
2972 /* Read Reselected Target ID and LUN */
2973 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
2974 if (dcb) { /* Arbitration lost but Reselection win */
2975 srb = dcb->active_srb;
2976 if (!srb) {
2977 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
2978 "but active_srb == NULL\n");
2979 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2980 return;
2981 }
2982 /* Why the if ? */
2983 if (!acb->scan_devices) {
2984 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
2985 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
2986 srb->cmd, dcb->target_id,
2987 dcb->target_lun, rsel_tar_lun_id,
2988 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
2989 /*srb->state |= SRB_DISCONNECT; */
2990
2991 srb->state = SRB_READY;
2992 free_tag(dcb, srb);
2993 list_move(&srb->list, &dcb->srb_waiting_list);
2994 waiting_set_timer(acb, HZ / 20);
2995
2996 /* return; */
2997 }
2998 }
2999 /* Read Reselected Target Id and LUN */
3000 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3001 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3002 "Got %i!\n", rsel_tar_lun_id);
3003 id = rsel_tar_lun_id & 0xff;
3004 lun = (rsel_tar_lun_id >> 8) & 7;
3005 dcb = find_dcb(acb, id, lun);
3006 if (!dcb) {
3007 dprintkl(KERN_ERR, "reselect: From non existent device "
3008 "<%02i-%i>\n", id, lun);
3009 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3010 return;
3011 }
3012 acb->active_dcb = dcb;
3013
3014 if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3015 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3016 "disconnection? <%02i-%i>\n",
3017 dcb->target_id, dcb->target_lun);
3018
3019 if (dcb->sync_mode & EN_TAG_QUEUEING) {
3020 srb = acb->tmp_srb;
3021 dcb->active_srb = srb;
3022 } else {
3023 /* There can be only one! */
3024 srb = dcb->active_srb;
3025 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3026 /*
3027 * abort command
3028 */
3029 dprintkl(KERN_DEBUG,
3030 "reselect: w/o disconnected cmds <%02i-%i>\n",
3031 dcb->target_id, dcb->target_lun);
3032 srb = acb->tmp_srb;
3033 srb->state = SRB_UNEXPECT_RESEL;
3034 dcb->active_srb = srb;
3035 enable_msgout_abort(acb, srb);
3036 } else {
3037 if (dcb->flag & ABORT_DEV_) {
3038 /*srb->state = SRB_ABORT_SENT; */
3039 enable_msgout_abort(acb, srb);
3040 } else
3041 srb->state = SRB_DATA_XFER;
3042
3043 }
3044 }
3045 srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3046
3047 /* Program HA ID, target ID, period and offset */
3048 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3049 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3050 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3051 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3052 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3053 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3054 /* SCSI command */
3055 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3056 }
3057
3058
tagq_blacklist(char * name)3059 static inline u8 tagq_blacklist(char *name)
3060 {
3061 #ifndef DC395x_NO_TAGQ
3062 #if 0
3063 u8 i;
3064 for (i = 0; i < BADDEVCNT; i++)
3065 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3066 return 1;
3067 #endif
3068 return 0;
3069 #else
3070 return 1;
3071 #endif
3072 }
3073
3074
disc_tagq_set(struct DeviceCtlBlk * dcb,struct ScsiInqData * ptr)3075 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3076 {
3077 /* Check for SCSI format (ANSI and Response data format) */
3078 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3079 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3080 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3081 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3082 /* ((dcb->dev_type == TYPE_DISK)
3083 || (dcb->dev_type == TYPE_MOD)) && */
3084 !tagq_blacklist(((char *)ptr) + 8)) {
3085 if (dcb->max_command == 1)
3086 dcb->max_command =
3087 dcb->acb->tag_max_num;
3088 dcb->sync_mode |= EN_TAG_QUEUEING;
3089 /*dcb->tag_mask = 0; */
3090 } else
3091 dcb->max_command = 1;
3092 }
3093 }
3094
3095
add_dev(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiInqData * ptr)3096 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3097 struct ScsiInqData *ptr)
3098 {
3099 u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3100 dcb->dev_type = bval1;
3101 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3102 disc_tagq_set(dcb, ptr);
3103 }
3104
3105
3106 /* unmap mapped pci regions from SRB */
pci_unmap_srb(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)3107 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3108 {
3109 struct scsi_cmnd *cmd = srb->cmd;
3110 enum dma_data_direction dir = cmd->sc_data_direction;
3111
3112 if (scsi_sg_count(cmd) && dir != DMA_NONE) {
3113 /* unmap DC395x SG list */
3114 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3115 srb->sg_bus_addr, SEGMENTX_LEN);
3116 dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN,
3117 DMA_TO_DEVICE);
3118 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3119 scsi_sg_count(cmd), scsi_bufflen(cmd));
3120 /* unmap the sg segments */
3121 scsi_dma_unmap(cmd);
3122 }
3123 }
3124
3125
3126 /* unmap mapped pci sense buffer from SRB */
pci_unmap_srb_sense(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)3127 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3128 struct ScsiReqBlk *srb)
3129 {
3130 if (!(srb->flag & AUTO_REQSENSE))
3131 return;
3132 /* Unmap sense buffer */
3133 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3134 srb->segment_x[0].address);
3135 dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address,
3136 srb->segment_x[0].length, DMA_FROM_DEVICE);
3137 /* Restore SG stuff */
3138 srb->total_xfer_length = srb->xferred;
3139 srb->segment_x[0].address =
3140 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3141 srb->segment_x[0].length =
3142 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3143 }
3144
3145
3146 /*
3147 * Complete execution of a SCSI command
3148 * Signal completion to the generic SCSI driver
3149 */
srb_done(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)3150 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3151 struct ScsiReqBlk *srb)
3152 {
3153 u8 tempcnt, status;
3154 struct scsi_cmnd *cmd = srb->cmd;
3155 enum dma_data_direction dir = cmd->sc_data_direction;
3156 int ckc_only = 1;
3157
3158 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3159 srb->cmd->device->id, (u8)srb->cmd->device->lun);
3160 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3161 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3162 scsi_sgtalbe(cmd));
3163 status = srb->target_status;
3164 set_host_byte(cmd, DID_OK);
3165 set_status_byte(cmd, SAM_STAT_GOOD);
3166 if (srb->flag & AUTO_REQSENSE) {
3167 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3168 pci_unmap_srb_sense(acb, srb);
3169 /*
3170 ** target status..........................
3171 */
3172 srb->flag &= ~AUTO_REQSENSE;
3173 srb->adapter_status = 0;
3174 srb->target_status = SAM_STAT_CHECK_CONDITION;
3175 if (debug_enabled(DBG_1)) {
3176 switch (cmd->sense_buffer[2] & 0x0f) {
3177 case NOT_READY:
3178 dprintkl(KERN_DEBUG,
3179 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3180 cmd->cmnd[0], dcb->target_id,
3181 dcb->target_lun, status, acb->scan_devices);
3182 break;
3183 case UNIT_ATTENTION:
3184 dprintkl(KERN_DEBUG,
3185 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3186 cmd->cmnd[0], dcb->target_id,
3187 dcb->target_lun, status, acb->scan_devices);
3188 break;
3189 case ILLEGAL_REQUEST:
3190 dprintkl(KERN_DEBUG,
3191 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3192 cmd->cmnd[0], dcb->target_id,
3193 dcb->target_lun, status, acb->scan_devices);
3194 break;
3195 case MEDIUM_ERROR:
3196 dprintkl(KERN_DEBUG,
3197 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3198 cmd->cmnd[0], dcb->target_id,
3199 dcb->target_lun, status, acb->scan_devices);
3200 break;
3201 case HARDWARE_ERROR:
3202 dprintkl(KERN_DEBUG,
3203 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3204 cmd->cmnd[0], dcb->target_id,
3205 dcb->target_lun, status, acb->scan_devices);
3206 break;
3207 }
3208 if (cmd->sense_buffer[7] >= 6)
3209 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3210 "(0x%08x 0x%08x)\n",
3211 cmd->sense_buffer[2], cmd->sense_buffer[12],
3212 cmd->sense_buffer[13],
3213 *((unsigned int *)(cmd->sense_buffer + 3)),
3214 *((unsigned int *)(cmd->sense_buffer + 8)));
3215 else
3216 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3217 cmd->sense_buffer[2],
3218 *((unsigned int *)(cmd->sense_buffer + 3)));
3219 }
3220
3221 if (status == SAM_STAT_CHECK_CONDITION) {
3222 set_host_byte(cmd, DID_BAD_TARGET);
3223 goto ckc_e;
3224 }
3225 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3226
3227 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);
3228
3229 goto ckc_e;
3230 }
3231
3232 /*************************************************************/
3233 if (status) {
3234 /*
3235 * target status..........................
3236 */
3237 if (status == SAM_STAT_CHECK_CONDITION) {
3238 request_sense(acb, dcb, srb);
3239 return;
3240 } else if (status == SAM_STAT_TASK_SET_FULL) {
3241 tempcnt = (u8)list_size(&dcb->srb_going_list);
3242 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3243 dcb->target_id, dcb->target_lun, tempcnt);
3244 if (tempcnt > 1)
3245 tempcnt--;
3246 dcb->max_command = tempcnt;
3247 free_tag(dcb, srb);
3248 list_move(&srb->list, &dcb->srb_waiting_list);
3249 waiting_set_timer(acb, HZ / 20);
3250 srb->adapter_status = 0;
3251 srb->target_status = 0;
3252 return;
3253 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3254 srb->adapter_status = H_SEL_TIMEOUT;
3255 srb->target_status = 0;
3256 set_host_byte(cmd, DID_NO_CONNECT);
3257 } else {
3258 srb->adapter_status = 0;
3259 set_host_byte(cmd, DID_ERROR);
3260 set_status_byte(cmd, status);
3261 }
3262 } else {
3263 /*
3264 ** process initiator status..........................
3265 */
3266 status = srb->adapter_status;
3267 if (status & H_OVER_UNDER_RUN) {
3268 srb->target_status = 0;
3269 scsi_msg_to_host_byte(cmd, srb->end_message);
3270 } else if (srb->status & PARITY_ERROR) {
3271 set_host_byte(cmd, DID_PARITY);
3272 } else { /* No error */
3273
3274 srb->adapter_status = 0;
3275 srb->target_status = 0;
3276 }
3277 }
3278
3279 ckc_only = 0;
3280 /* Check Error Conditions */
3281 ckc_e:
3282
3283 pci_unmap_srb(acb, srb);
3284
3285 if (cmd->cmnd[0] == INQUIRY) {
3286 unsigned char *base = NULL;
3287 struct ScsiInqData *ptr;
3288 unsigned long flags = 0;
3289 struct scatterlist* sg = scsi_sglist(cmd);
3290 size_t offset = 0, len = sizeof(struct ScsiInqData);
3291
3292 local_irq_save(flags);
3293 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3294 ptr = (struct ScsiInqData *)(base + offset);
3295
3296 if (!ckc_only && get_host_byte(cmd) == DID_OK
3297 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3298 && dir != DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3299 dcb->inquiry7 = ptr->Flags;
3300
3301 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3302 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3303 if ((get_host_byte(cmd) == DID_OK) ||
3304 (get_status_byte(cmd) == SAM_STAT_CHECK_CONDITION)) {
3305 if (!dcb->init_tcq_flag) {
3306 add_dev(acb, dcb, ptr);
3307 dcb->init_tcq_flag = 1;
3308 }
3309 }
3310
3311 scsi_kunmap_atomic_sg(base);
3312 local_irq_restore(flags);
3313 }
3314
3315 /* Here is the info for Doug Gilbert's sg3 ... */
3316 scsi_set_resid(cmd, srb->total_xfer_length);
3317 if (debug_enabled(DBG_KG)) {
3318 if (srb->total_xfer_length)
3319 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3320 "cmnd=0x%02x Missed %i bytes\n",
3321 cmd, cmd->device->id, (u8)cmd->device->lun,
3322 cmd->cmnd[0], srb->total_xfer_length);
3323 }
3324
3325 if (srb != acb->tmp_srb) {
3326 /* Add to free list */
3327 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3328 cmd, cmd->result);
3329 list_move_tail(&srb->list, &acb->srb_free_list);
3330 } else {
3331 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3332 }
3333
3334 scsi_done(cmd);
3335 waiting_process_next(acb);
3336 }
3337
3338
3339 /* abort all cmds in our queues */
doing_srb_done(struct AdapterCtlBlk * acb,u8 did_flag,struct scsi_cmnd * cmd,u8 force)3340 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3341 struct scsi_cmnd *cmd, u8 force)
3342 {
3343 struct DeviceCtlBlk *dcb;
3344 dprintkl(KERN_INFO, "doing_srb_done: pids ");
3345
3346 list_for_each_entry(dcb, &acb->dcb_list, list) {
3347 struct ScsiReqBlk *srb;
3348 struct ScsiReqBlk *tmp;
3349 struct scsi_cmnd *p;
3350
3351 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3352 p = srb->cmd;
3353 printk("G:%p(%02i-%i) ", p,
3354 p->device->id, (u8)p->device->lun);
3355 list_del(&srb->list);
3356 free_tag(dcb, srb);
3357 list_add_tail(&srb->list, &acb->srb_free_list);
3358 set_host_byte(p, did_flag);
3359 set_status_byte(p, SAM_STAT_GOOD);
3360 pci_unmap_srb_sense(acb, srb);
3361 pci_unmap_srb(acb, srb);
3362 if (force) {
3363 /* For new EH, we normally don't need to give commands back,
3364 * as they all complete or all time out */
3365 scsi_done(p);
3366 }
3367 }
3368 if (!list_empty(&dcb->srb_going_list))
3369 dprintkl(KERN_DEBUG,
3370 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3371 dcb->target_id, dcb->target_lun);
3372 if (dcb->tag_mask)
3373 dprintkl(KERN_DEBUG,
3374 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3375 dcb->target_id, dcb->target_lun,
3376 dcb->tag_mask);
3377
3378 /* Waiting queue */
3379 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3380 p = srb->cmd;
3381
3382 printk("W:%p<%02i-%i>", p, p->device->id,
3383 (u8)p->device->lun);
3384 list_move_tail(&srb->list, &acb->srb_free_list);
3385 set_host_byte(p, did_flag);
3386 set_status_byte(p, SAM_STAT_GOOD);
3387 pci_unmap_srb_sense(acb, srb);
3388 pci_unmap_srb(acb, srb);
3389 if (force) {
3390 /* For new EH, we normally don't need to give commands back,
3391 * as they all complete or all time out */
3392 scsi_done(cmd);
3393 }
3394 }
3395 if (!list_empty(&dcb->srb_waiting_list))
3396 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3397 list_size(&dcb->srb_waiting_list), dcb->target_id,
3398 dcb->target_lun);
3399 dcb->flag &= ~ABORT_DEV_;
3400 }
3401 printk("\n");
3402 }
3403
3404
reset_scsi_bus(struct AdapterCtlBlk * acb)3405 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3406 {
3407 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3408 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3409 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3410
3411 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3412 /* nothing */;
3413 }
3414
3415
set_basic_config(struct AdapterCtlBlk * acb)3416 static void set_basic_config(struct AdapterCtlBlk *acb)
3417 {
3418 u8 bval;
3419 u16 wval;
3420 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3421 if (acb->config & HCC_PARITY)
3422 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3423 else
3424 bval = PHASELATCH | INITIATOR | BLOCKRST;
3425
3426 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3427
3428 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3429 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3430 /* program Host ID */
3431 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3432 /* set ansynchronous transfer */
3433 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3434 /* Turn LED control off */
3435 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3436 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3437 /* DMA config */
3438 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3439 wval |=
3440 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3441 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3442 /* Clear pending interrupt status */
3443 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3444 /* Enable SCSI interrupt */
3445 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3446 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3447 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3448 );
3449 }
3450
3451
scsi_reset_detect(struct AdapterCtlBlk * acb)3452 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3453 {
3454 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3455 /* delay half a second */
3456 if (timer_pending(&acb->waiting_timer))
3457 del_timer(&acb->waiting_timer);
3458
3459 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3460 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3461 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3462 udelay(500);
3463 /* Maybe we locked up the bus? Then lets wait even longer ... */
3464 acb->last_reset =
3465 jiffies + 5 * HZ / 2 +
3466 HZ * acb->eeprom.delay_time;
3467
3468 clear_fifo(acb, "scsi_reset_detect");
3469 set_basic_config(acb);
3470 /*1.25 */
3471 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3472
3473 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3474 acb->acb_flag |= RESET_DONE;
3475 } else {
3476 acb->acb_flag |= RESET_DETECT;
3477 reset_dev_param(acb);
3478 doing_srb_done(acb, DID_RESET, NULL, 1);
3479 /*DC395x_RecoverSRB( acb ); */
3480 acb->active_dcb = NULL;
3481 acb->acb_flag = 0;
3482 waiting_process_next(acb);
3483 }
3484 }
3485
3486
request_sense(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)3487 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3488 struct ScsiReqBlk *srb)
3489 {
3490 struct scsi_cmnd *cmd = srb->cmd;
3491 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3492 cmd, cmd->device->id, (u8)cmd->device->lun);
3493
3494 srb->flag |= AUTO_REQSENSE;
3495 srb->adapter_status = 0;
3496 srb->target_status = 0;
3497
3498 /* KG: Can this prevent crap sense data ? */
3499 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3500
3501 /* Save some data */
3502 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3503 srb->segment_x[0].address;
3504 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3505 srb->segment_x[0].length;
3506 srb->xferred = srb->total_xfer_length;
3507 /* srb->segment_x : a one entry of S/G list table */
3508 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3509 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3510 /* Map sense buffer */
3511 srb->segment_x[0].address = dma_map_single(&acb->dev->dev,
3512 cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
3513 DMA_FROM_DEVICE);
3514 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3515 cmd->sense_buffer, srb->segment_x[0].address,
3516 SCSI_SENSE_BUFFERSIZE);
3517 srb->sg_count = 1;
3518 srb->sg_index = 0;
3519
3520 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3521 dprintkl(KERN_DEBUG,
3522 "request_sense: (0x%p) failed <%02i-%i>\n",
3523 srb->cmd, dcb->target_id, dcb->target_lun);
3524 list_move(&srb->list, &dcb->srb_waiting_list);
3525 waiting_set_timer(acb, HZ / 100);
3526 }
3527 }
3528
3529
3530 /**
3531 * device_alloc - Allocate a new device instance. This create the
3532 * devices instance and sets up all the data items. The adapter
3533 * instance is required to obtain confiuration information for this
3534 * device. This does *not* add this device to the adapters device
3535 * list.
3536 *
3537 * @acb: The adapter to obtain configuration information from.
3538 * @target: The target for the new device.
3539 * @lun: The lun for the new device.
3540 *
3541 * Return the new device if successful or NULL on failure.
3542 **/
device_alloc(struct AdapterCtlBlk * acb,u8 target,u8 lun)3543 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3544 u8 target, u8 lun)
3545 {
3546 struct NvRamType *eeprom = &acb->eeprom;
3547 u8 period_index = eeprom->target[target].period & 0x07;
3548 struct DeviceCtlBlk *dcb;
3549
3550 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3551 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3552 if (!dcb)
3553 return NULL;
3554 dcb->acb = NULL;
3555 INIT_LIST_HEAD(&dcb->srb_going_list);
3556 INIT_LIST_HEAD(&dcb->srb_waiting_list);
3557 dcb->active_srb = NULL;
3558 dcb->tag_mask = 0;
3559 dcb->max_command = 1;
3560 dcb->target_id = target;
3561 dcb->target_lun = lun;
3562 dcb->dev_mode = eeprom->target[target].cfg0;
3563 #ifndef DC395x_NO_DISCONNECT
3564 dcb->identify_msg =
3565 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3566 #else
3567 dcb->identify_msg = IDENTIFY(0, lun);
3568 #endif
3569 dcb->inquiry7 = 0;
3570 dcb->sync_mode = 0;
3571 dcb->min_nego_period = clock_period[period_index];
3572 dcb->sync_period = 0;
3573 dcb->sync_offset = 0;
3574 dcb->flag = 0;
3575
3576 #ifndef DC395x_NO_WIDE
3577 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3578 && (acb->config & HCC_WIDE_CARD))
3579 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3580 #endif
3581 #ifndef DC395x_NO_SYNC
3582 if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3583 if (!(lun) || current_sync_offset)
3584 dcb->sync_mode |= SYNC_NEGO_ENABLE;
3585 #endif
3586 if (dcb->target_lun != 0) {
3587 /* Copy settings */
3588 struct DeviceCtlBlk *p = NULL, *iter;
3589
3590 list_for_each_entry(iter, &acb->dcb_list, list)
3591 if (iter->target_id == dcb->target_id) {
3592 p = iter;
3593 break;
3594 }
3595
3596 if (!p) {
3597 kfree(dcb);
3598 return NULL;
3599 }
3600
3601 dprintkdbg(DBG_1,
3602 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3603 dcb->target_id, dcb->target_lun,
3604 p->target_id, p->target_lun);
3605 dcb->sync_mode = p->sync_mode;
3606 dcb->sync_period = p->sync_period;
3607 dcb->min_nego_period = p->min_nego_period;
3608 dcb->sync_offset = p->sync_offset;
3609 dcb->inquiry7 = p->inquiry7;
3610 }
3611 return dcb;
3612 }
3613
3614
3615 /**
3616 * adapter_add_device - Adds the device instance to the adaptor instance.
3617 *
3618 * @acb: The adapter device to be updated
3619 * @dcb: A newly created and initialised device instance to add.
3620 **/
adapter_add_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3621 static void adapter_add_device(struct AdapterCtlBlk *acb,
3622 struct DeviceCtlBlk *dcb)
3623 {
3624 /* backpointer to adapter */
3625 dcb->acb = acb;
3626
3627 /* set run_robin to this device if it is currently empty */
3628 if (list_empty(&acb->dcb_list))
3629 acb->dcb_run_robin = dcb;
3630
3631 /* add device to list */
3632 list_add_tail(&dcb->list, &acb->dcb_list);
3633
3634 /* update device maps */
3635 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3636 acb->children[dcb->target_id][dcb->target_lun] = dcb;
3637 }
3638
3639
3640 /**
3641 * adapter_remove_device - Removes the device instance from the adaptor
3642 * instance. The device instance is not check in any way or freed by this.
3643 * The caller is expected to take care of that. This will simply remove the
3644 * device from the adapters data strcutures.
3645 *
3646 * @acb: The adapter device to be updated
3647 * @dcb: A device that has previously been added to the adapter.
3648 **/
adapter_remove_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3649 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3650 struct DeviceCtlBlk *dcb)
3651 {
3652 struct DeviceCtlBlk *i;
3653 struct DeviceCtlBlk *tmp;
3654 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3655 dcb->target_id, dcb->target_lun);
3656
3657 /* fix up any pointers to this device that we have in the adapter */
3658 if (acb->active_dcb == dcb)
3659 acb->active_dcb = NULL;
3660 if (acb->dcb_run_robin == dcb)
3661 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3662
3663 /* unlink from list */
3664 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3665 if (dcb == i) {
3666 list_del(&i->list);
3667 break;
3668 }
3669
3670 /* clear map and children */
3671 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3672 acb->children[dcb->target_id][dcb->target_lun] = NULL;
3673 dcb->acb = NULL;
3674 }
3675
3676
3677 /**
3678 * adapter_remove_and_free_device - Removes a single device from the adapter
3679 * and then frees the device information.
3680 *
3681 * @acb: The adapter device to be updated
3682 * @dcb: A device that has previously been added to the adapter.
3683 */
adapter_remove_and_free_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3684 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3685 struct DeviceCtlBlk *dcb)
3686 {
3687 if (list_size(&dcb->srb_going_list) > 1) {
3688 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3689 "Won't remove because of %i active requests.\n",
3690 dcb->target_id, dcb->target_lun,
3691 list_size(&dcb->srb_going_list));
3692 return;
3693 }
3694 adapter_remove_device(acb, dcb);
3695 kfree(dcb);
3696 }
3697
3698
3699 /**
3700 * adapter_remove_and_free_all_devices - Removes and frees all of the
3701 * devices associated with the specified adapter.
3702 *
3703 * @acb: The adapter from which all devices should be removed.
3704 **/
adapter_remove_and_free_all_devices(struct AdapterCtlBlk * acb)3705 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3706 {
3707 struct DeviceCtlBlk *dcb;
3708 struct DeviceCtlBlk *tmp;
3709 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3710 list_size(&acb->dcb_list));
3711
3712 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3713 adapter_remove_and_free_device(acb, dcb);
3714 }
3715
3716
3717 /**
3718 * dc395x_sdev_init - Called by the scsi mid layer to tell us about a new
3719 * scsi device that we need to deal with. We allocate a new device and then
3720 * insert that device into the adapters device list.
3721 *
3722 * @scsi_device: The new scsi device that we need to handle.
3723 **/
dc395x_sdev_init(struct scsi_device * scsi_device)3724 static int dc395x_sdev_init(struct scsi_device *scsi_device)
3725 {
3726 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3727 struct DeviceCtlBlk *dcb;
3728
3729 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3730 if (!dcb)
3731 return -ENOMEM;
3732 adapter_add_device(acb, dcb);
3733
3734 return 0;
3735 }
3736
3737
3738 /**
3739 * dc395x_sdev_destroy - Called by the scsi mid layer to tell us about a
3740 * device that is going away.
3741 *
3742 * @scsi_device: The new scsi device that we need to handle.
3743 **/
dc395x_sdev_destroy(struct scsi_device * scsi_device)3744 static void dc395x_sdev_destroy(struct scsi_device *scsi_device)
3745 {
3746 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3747 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3748 if (dcb)
3749 adapter_remove_and_free_device(acb, dcb);
3750 }
3751
3752
3753
3754
3755 /**
3756 * trms1040_wait_30us: wait for 30 us
3757 *
3758 * Waits for 30us (using the chip by the looks of it..)
3759 *
3760 * @io_port: base I/O address
3761 **/
trms1040_wait_30us(unsigned long io_port)3762 static void trms1040_wait_30us(unsigned long io_port)
3763 {
3764 /* ScsiPortStallExecution(30); wait 30 us */
3765 outb(5, io_port + TRM_S1040_GEN_TIMER);
3766 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3767 /* nothing */ ;
3768 }
3769
3770
3771 /**
3772 * trms1040_write_cmd - write the secified command and address to
3773 * chip
3774 *
3775 * @io_port: base I/O address
3776 * @cmd: SB + op code (command) to send
3777 * @addr: address to send
3778 **/
trms1040_write_cmd(unsigned long io_port,u8 cmd,u8 addr)3779 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3780 {
3781 int i;
3782 u8 send_data;
3783
3784 /* program SB + OP code */
3785 for (i = 0; i < 3; i++, cmd <<= 1) {
3786 send_data = NVR_SELECT;
3787 if (cmd & 0x04) /* Start from bit 2 */
3788 send_data |= NVR_BITOUT;
3789
3790 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3791 trms1040_wait_30us(io_port);
3792 outb((send_data | NVR_CLOCK),
3793 io_port + TRM_S1040_GEN_NVRAM);
3794 trms1040_wait_30us(io_port);
3795 }
3796
3797 /* send address */
3798 for (i = 0; i < 7; i++, addr <<= 1) {
3799 send_data = NVR_SELECT;
3800 if (addr & 0x40) /* Start from bit 6 */
3801 send_data |= NVR_BITOUT;
3802
3803 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3804 trms1040_wait_30us(io_port);
3805 outb((send_data | NVR_CLOCK),
3806 io_port + TRM_S1040_GEN_NVRAM);
3807 trms1040_wait_30us(io_port);
3808 }
3809 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3810 trms1040_wait_30us(io_port);
3811 }
3812
3813
3814 /**
3815 * trms1040_set_data - store a single byte in the eeprom
3816 *
3817 * Called from write all to write a single byte into the SSEEPROM
3818 * Which is done one bit at a time.
3819 *
3820 * @io_port: base I/O address
3821 * @addr: offset into EEPROM
3822 * @byte: bytes to write
3823 **/
trms1040_set_data(unsigned long io_port,u8 addr,u8 byte)3824 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
3825 {
3826 int i;
3827 u8 send_data;
3828
3829 /* Send write command & address */
3830 trms1040_write_cmd(io_port, 0x05, addr);
3831
3832 /* Write data */
3833 for (i = 0; i < 8; i++, byte <<= 1) {
3834 send_data = NVR_SELECT;
3835 if (byte & 0x80) /* Start from bit 7 */
3836 send_data |= NVR_BITOUT;
3837
3838 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3839 trms1040_wait_30us(io_port);
3840 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3841 trms1040_wait_30us(io_port);
3842 }
3843 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3844 trms1040_wait_30us(io_port);
3845
3846 /* Disable chip select */
3847 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3848 trms1040_wait_30us(io_port);
3849
3850 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3851 trms1040_wait_30us(io_port);
3852
3853 /* Wait for write ready */
3854 while (1) {
3855 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3856 trms1040_wait_30us(io_port);
3857
3858 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3859 trms1040_wait_30us(io_port);
3860
3861 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
3862 break;
3863 }
3864
3865 /* Disable chip select */
3866 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3867 }
3868
3869
3870 /**
3871 * trms1040_write_all - write 128 bytes to the eeprom
3872 *
3873 * Write the supplied 128 bytes to the chips SEEPROM
3874 *
3875 * @eeprom: the data to write
3876 * @io_port: the base io port
3877 **/
trms1040_write_all(struct NvRamType * eeprom,unsigned long io_port)3878 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
3879 {
3880 u8 *b_eeprom = (u8 *)eeprom;
3881 u8 addr;
3882
3883 /* Enable SEEPROM */
3884 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3885 io_port + TRM_S1040_GEN_CONTROL);
3886
3887 /* write enable */
3888 trms1040_write_cmd(io_port, 0x04, 0xFF);
3889 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3890 trms1040_wait_30us(io_port);
3891
3892 /* write */
3893 for (addr = 0; addr < 128; addr++, b_eeprom++)
3894 trms1040_set_data(io_port, addr, *b_eeprom);
3895
3896 /* write disable */
3897 trms1040_write_cmd(io_port, 0x04, 0x00);
3898 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3899 trms1040_wait_30us(io_port);
3900
3901 /* Disable SEEPROM */
3902 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3903 io_port + TRM_S1040_GEN_CONTROL);
3904 }
3905
3906
3907 /**
3908 * trms1040_get_data - get a single byte from the eeprom
3909 *
3910 * Called from read all to read a single byte into the SSEEPROM
3911 * Which is done one bit at a time.
3912 *
3913 * @io_port: base I/O address
3914 * @addr: offset into SEEPROM
3915 *
3916 * Returns the byte read.
3917 **/
trms1040_get_data(unsigned long io_port,u8 addr)3918 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
3919 {
3920 int i;
3921 u8 read_byte;
3922 u8 result = 0;
3923
3924 /* Send read command & address */
3925 trms1040_write_cmd(io_port, 0x06, addr);
3926
3927 /* read data */
3928 for (i = 0; i < 8; i++) {
3929 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3930 trms1040_wait_30us(io_port);
3931 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3932
3933 /* Get data bit while falling edge */
3934 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
3935 result <<= 1;
3936 if (read_byte & NVR_BITIN)
3937 result |= 1;
3938
3939 trms1040_wait_30us(io_port);
3940 }
3941
3942 /* Disable chip select */
3943 outb(0, io_port + TRM_S1040_GEN_NVRAM);
3944 return result;
3945 }
3946
3947
3948 /**
3949 * trms1040_read_all - read all bytes from the eeprom
3950 *
3951 * Read the 128 bytes from the SEEPROM.
3952 *
3953 * @eeprom: where to store the data
3954 * @io_port: the base io port
3955 **/
trms1040_read_all(struct NvRamType * eeprom,unsigned long io_port)3956 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
3957 {
3958 u8 *b_eeprom = (u8 *)eeprom;
3959 u8 addr;
3960
3961 /* Enable SEEPROM */
3962 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3963 io_port + TRM_S1040_GEN_CONTROL);
3964
3965 /* read details */
3966 for (addr = 0; addr < 128; addr++, b_eeprom++)
3967 *b_eeprom = trms1040_get_data(io_port, addr);
3968
3969 /* Disable SEEPROM */
3970 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3971 io_port + TRM_S1040_GEN_CONTROL);
3972 }
3973
3974
3975
3976 /**
3977 * check_eeprom - get and check contents of the eeprom
3978 *
3979 * Read seeprom 128 bytes into the memory provider in eeprom.
3980 * Checks the checksum and if it's not correct it uses a set of default
3981 * values.
3982 *
3983 * @eeprom: caller allocated strcuture to read the eeprom data into
3984 * @io_port: io port to read from
3985 **/
check_eeprom(struct NvRamType * eeprom,unsigned long io_port)3986 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
3987 {
3988 u16 *w_eeprom = (u16 *)eeprom;
3989 u16 w_addr;
3990 u16 cksum;
3991 u32 d_addr;
3992 u32 *d_eeprom;
3993
3994 trms1040_read_all(eeprom, io_port); /* read eeprom */
3995
3996 cksum = 0;
3997 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
3998 w_addr++, w_eeprom++)
3999 cksum += *w_eeprom;
4000 if (cksum != 0x1234) {
4001 /*
4002 * Checksum is wrong.
4003 * Load a set of defaults into the eeprom buffer
4004 */
4005 dprintkl(KERN_WARNING,
4006 "EEProm checksum error: using default values and options.\n");
4007 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4008 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4009 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4010 eeprom->sub_sys_id[1] =
4011 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4012 eeprom->sub_class = 0x00;
4013 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4014 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4015 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4016 eeprom->device_id[1] =
4017 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4018 eeprom->reserved = 0x00;
4019
4020 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4021 d_addr < 16; d_addr++, d_eeprom++)
4022 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4023
4024 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4025 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4026 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4027 *d_eeprom = 0x00;
4028
4029 /* Now load defaults (maybe set by boot/module params) */
4030 set_safe_settings();
4031 fix_settings();
4032 eeprom_override(eeprom);
4033
4034 eeprom->cksum = 0x00;
4035 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4036 w_addr < 63; w_addr++, w_eeprom++)
4037 cksum += *w_eeprom;
4038
4039 *w_eeprom = 0x1234 - cksum;
4040 trms1040_write_all(eeprom, io_port);
4041 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4042 } else {
4043 set_safe_settings();
4044 eeprom_index_to_delay(eeprom);
4045 eeprom_override(eeprom);
4046 }
4047 }
4048
4049
4050 /**
4051 * print_eeprom_settings - output the eeprom settings
4052 * to the kernel log so people can see what they were.
4053 *
4054 * @eeprom: The eeprom data strucutre to show details for.
4055 **/
print_eeprom_settings(struct NvRamType * eeprom)4056 static void print_eeprom_settings(struct NvRamType *eeprom)
4057 {
4058 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4059 eeprom->scsi_id,
4060 eeprom->target[0].period,
4061 clock_speed[eeprom->target[0].period] / 10,
4062 clock_speed[eeprom->target[0].period] % 10,
4063 eeprom->target[0].cfg0);
4064 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4065 eeprom->channel_cfg, eeprom->max_tag,
4066 1 << eeprom->max_tag, eeprom->delay_time);
4067 }
4068
4069
4070 /* Free SG tables */
adapter_sg_tables_free(struct AdapterCtlBlk * acb)4071 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4072 {
4073 int i;
4074 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4075
4076 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4077 kfree(acb->srb_array[i].segment_x);
4078 }
4079
4080
4081 /*
4082 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4083 * should never cross a page boundary */
adapter_sg_tables_alloc(struct AdapterCtlBlk * acb)4084 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4085 {
4086 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4087 *SEGMENTX_LEN;
4088 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4089 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4090 int srb_idx = 0;
4091 unsigned i = 0;
4092 struct SGentry *ptr;
4093
4094 for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4095 acb->srb_array[i].segment_x = NULL;
4096
4097 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4098 while (pages--) {
4099 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4100 if (!ptr) {
4101 adapter_sg_tables_free(acb);
4102 return 1;
4103 }
4104 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4105 PAGE_SIZE, ptr, srb_idx);
4106 i = 0;
4107 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4108 acb->srb_array[srb_idx++].segment_x =
4109 ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4110 }
4111 if (i < srbs_per_page)
4112 acb->srb.segment_x =
4113 ptr + (i * DC395x_MAX_SG_LISTENTRY);
4114 else
4115 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4116 return 0;
4117 }
4118
4119
4120
4121 /**
4122 * adapter_print_config - print adapter connection and termination
4123 * config
4124 *
4125 * The io port in the adapter needs to have been set before calling
4126 * this function.
4127 *
4128 * @acb: The adapter to print the information for.
4129 **/
adapter_print_config(struct AdapterCtlBlk * acb)4130 static void adapter_print_config(struct AdapterCtlBlk *acb)
4131 {
4132 u8 bval;
4133
4134 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4135 dprintkl(KERN_INFO, "%sConnectors: ",
4136 ((bval & WIDESCSI) ? "(Wide) " : ""));
4137 if (!(bval & CON5068))
4138 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4139 if (!(bval & CON68))
4140 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4141 if (!(bval & CON50))
4142 printk("int50 ");
4143 if ((bval & (CON5068 | CON50 | CON68)) ==
4144 0 /*(CON5068 | CON50 | CON68) */ )
4145 printk(" Oops! (All 3?) ");
4146 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4147 printk(" Termination: ");
4148 if (bval & DIS_TERM)
4149 printk("Disabled\n");
4150 else {
4151 if (bval & AUTOTERM)
4152 printk("Auto ");
4153 if (bval & LOW8TERM)
4154 printk("Low ");
4155 if (bval & UP8TERM)
4156 printk("High ");
4157 printk("\n");
4158 }
4159 }
4160
4161
4162 /**
4163 * adapter_init_params - Initialize the various parameters in the
4164 * adapter structure. Note that the pointer to the scsi_host is set
4165 * early (when this instance is created) and the io_port and irq
4166 * values are set later after they have been reserved. This just gets
4167 * everything set to a good starting position.
4168 *
4169 * The eeprom structure in the adapter needs to have been set before
4170 * calling this function.
4171 *
4172 * @acb: The adapter to initialize.
4173 **/
adapter_init_params(struct AdapterCtlBlk * acb)4174 static void adapter_init_params(struct AdapterCtlBlk *acb)
4175 {
4176 struct NvRamType *eeprom = &acb->eeprom;
4177 int i;
4178
4179 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4180 /* NOTE: acb->io_port_base is set at port registration time */
4181 /* NOTE: acb->io_port_len is set at port registration time */
4182
4183 INIT_LIST_HEAD(&acb->dcb_list);
4184 acb->dcb_run_robin = NULL;
4185 acb->active_dcb = NULL;
4186
4187 INIT_LIST_HEAD(&acb->srb_free_list);
4188 /* temp SRB for Q tag used or abort command used */
4189 acb->tmp_srb = &acb->srb;
4190 timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4191 timer_setup(&acb->selto_timer, NULL, 0);
4192
4193 acb->srb_count = DC395x_MAX_SRB_CNT;
4194
4195 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4196 /* NOTE: acb->irq_level is set at IRQ registration time */
4197
4198 acb->tag_max_num = 1 << eeprom->max_tag;
4199 if (acb->tag_max_num > 30)
4200 acb->tag_max_num = 30;
4201
4202 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4203 acb->gmode2 = eeprom->channel_cfg;
4204 acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4205
4206 if (eeprom->channel_cfg & NAC_SCANLUN)
4207 acb->lun_chk = 1;
4208 acb->scan_devices = 1;
4209
4210 acb->scsi_host->this_id = eeprom->scsi_id;
4211 acb->hostid_bit = (1 << acb->scsi_host->this_id);
4212
4213 for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4214 acb->dcb_map[i] = 0;
4215
4216 acb->msg_len = 0;
4217
4218 /* link static array of srbs into the srb free list */
4219 for (i = 0; i < acb->srb_count - 1; i++)
4220 list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list);
4221 }
4222
4223
4224 /**
4225 * adapter_init_scsi_host - Initialize the scsi host instance based on
4226 * values that we have already stored in the adapter instance. There's
4227 * some mention that a lot of these are deprecated, so we won't use
4228 * them (we'll use the ones in the adapter instance) but we'll fill
4229 * them in in case something else needs them.
4230 *
4231 * The eeprom structure, irq and io ports in the adapter need to have
4232 * been set before calling this function.
4233 *
4234 * @host: The scsi host instance to fill in the values for.
4235 **/
adapter_init_scsi_host(struct Scsi_Host * host)4236 static void adapter_init_scsi_host(struct Scsi_Host *host)
4237 {
4238 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4239 struct NvRamType *eeprom = &acb->eeprom;
4240
4241 host->max_cmd_len = 24;
4242 host->can_queue = DC395x_MAX_CMD_QUEUE;
4243 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4244 host->this_id = (int)eeprom->scsi_id;
4245 host->io_port = acb->io_port_base;
4246 host->n_io_port = acb->io_port_len;
4247 host->dma_channel = -1;
4248 host->unique_id = acb->io_port_base;
4249 host->irq = acb->irq_level;
4250 acb->last_reset = jiffies;
4251
4252 host->max_id = 16;
4253 if (host->max_id - 1 == eeprom->scsi_id)
4254 host->max_id--;
4255
4256 if (eeprom->channel_cfg & NAC_SCANLUN)
4257 host->max_lun = 8;
4258 else
4259 host->max_lun = 1;
4260 }
4261
4262
4263 /**
4264 * adapter_init_chip - Get the chip into a know state and figure out
4265 * some of the settings that apply to this adapter.
4266 *
4267 * The io port in the adapter needs to have been set before calling
4268 * this function. The config will be configured correctly on return.
4269 *
4270 * @acb: The adapter which we are to init.
4271 **/
adapter_init_chip(struct AdapterCtlBlk * acb)4272 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4273 {
4274 struct NvRamType *eeprom = &acb->eeprom;
4275
4276 /* Mask all the interrupt */
4277 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4278 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4279
4280 /* Reset SCSI module */
4281 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4282
4283 /* Reset PCI/DMA module */
4284 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4285 udelay(20);
4286
4287 /* program configuration 0 */
4288 acb->config = HCC_AUTOTERM | HCC_PARITY;
4289 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4290 acb->config |= HCC_WIDE_CARD;
4291
4292 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4293 acb->config |= HCC_SCSI_RESET;
4294
4295 if (acb->config & HCC_SCSI_RESET) {
4296 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4297 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4298
4299 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4300 /*spin_unlock_irq (&io_request_lock); */
4301 udelay(500);
4302
4303 acb->last_reset =
4304 jiffies + HZ / 2 +
4305 HZ * acb->eeprom.delay_time;
4306
4307 /*spin_lock_irq (&io_request_lock); */
4308 }
4309 }
4310
4311
4312 /**
4313 * adapter_init - Grab the resource for the card, setup the adapter
4314 * information, set the card into a known state, create the various
4315 * tables etc etc. This basically gets all adapter information all up
4316 * to date, initialised and gets the chip in sync with it.
4317 *
4318 * @acb: The adapter which we are to init.
4319 * @io_port: The base I/O port
4320 * @io_port_len: The I/O port size
4321 * @irq: IRQ
4322 *
4323 * Returns 0 if the initialization succeeds, any other value on
4324 * failure.
4325 **/
adapter_init(struct AdapterCtlBlk * acb,unsigned long io_port,u32 io_port_len,unsigned int irq)4326 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4327 u32 io_port_len, unsigned int irq)
4328 {
4329 if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4330 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4331 goto failed;
4332 }
4333 /* store port base to indicate we have registered it */
4334 acb->io_port_base = io_port;
4335 acb->io_port_len = io_port_len;
4336
4337 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4338 /* release the region we just claimed */
4339 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4340 goto failed;
4341 }
4342 /* store irq to indicate we have registered it */
4343 acb->irq_level = irq;
4344
4345 /* get eeprom configuration information and command line settings etc */
4346 check_eeprom(&acb->eeprom, io_port);
4347 print_eeprom_settings(&acb->eeprom);
4348
4349 /* setup adapter control block */
4350 adapter_init_params(acb);
4351
4352 /* display card connectors/termination settings */
4353 adapter_print_config(acb);
4354
4355 if (adapter_sg_tables_alloc(acb)) {
4356 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4357 goto failed;
4358 }
4359 adapter_init_scsi_host(acb->scsi_host);
4360 adapter_init_chip(acb);
4361 set_basic_config(acb);
4362
4363 dprintkdbg(DBG_0,
4364 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4365 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4366 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4367 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4368 return 0;
4369
4370 failed:
4371 if (acb->irq_level)
4372 free_irq(acb->irq_level, acb);
4373 if (acb->io_port_base)
4374 release_region(acb->io_port_base, acb->io_port_len);
4375 adapter_sg_tables_free(acb);
4376
4377 return 1;
4378 }
4379
4380
4381 /**
4382 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4383 * stopping all operations and disabling interrupt generation on the
4384 * card.
4385 *
4386 * @acb: The adapter which we are to shutdown.
4387 **/
adapter_uninit_chip(struct AdapterCtlBlk * acb)4388 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4389 {
4390 /* disable interrupts */
4391 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4392 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4393
4394 /* reset the scsi bus */
4395 if (acb->config & HCC_SCSI_RESET)
4396 reset_scsi_bus(acb);
4397
4398 /* clear any pending interrupt state */
4399 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4400 }
4401
4402
4403
4404 /**
4405 * adapter_uninit - Shut down the chip and release any resources that
4406 * we had allocated. Once this returns the adapter should not be used
4407 * anymore.
4408 *
4409 * @acb: The adapter which we are to un-initialize.
4410 **/
adapter_uninit(struct AdapterCtlBlk * acb)4411 static void adapter_uninit(struct AdapterCtlBlk *acb)
4412 {
4413 unsigned long flags;
4414 DC395x_LOCK_IO(acb->scsi_host, flags);
4415
4416 /* remove timers */
4417 if (timer_pending(&acb->waiting_timer))
4418 del_timer(&acb->waiting_timer);
4419 if (timer_pending(&acb->selto_timer))
4420 del_timer(&acb->selto_timer);
4421
4422 adapter_uninit_chip(acb);
4423 adapter_remove_and_free_all_devices(acb);
4424 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4425
4426 if (acb->irq_level)
4427 free_irq(acb->irq_level, acb);
4428 if (acb->io_port_base)
4429 release_region(acb->io_port_base, acb->io_port_len);
4430
4431 adapter_sg_tables_free(acb);
4432 }
4433
4434
4435 #undef YESNO
4436 #define YESNO(YN) \
4437 if (YN) seq_printf(m, " Yes ");\
4438 else seq_printf(m, " No ")
4439
dc395x_show_info(struct seq_file * m,struct Scsi_Host * host)4440 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4441 {
4442 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4443 int spd, spd1;
4444 struct DeviceCtlBlk *dcb;
4445 unsigned long flags;
4446 int dev;
4447
4448 seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4449 " Driver Version " DC395X_VERSION "\n");
4450
4451 DC395x_LOCK_IO(acb->scsi_host, flags);
4452
4453 seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4454 seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4455 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4456 seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4457 seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4458 seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4459
4460 seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4461 seq_printf(m, "AdapterID %i\n", host->this_id);
4462
4463 seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4464 /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4465 seq_printf(m, ", FilterCfg 0x%02x",
4466 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4467 seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4468 /*seq_printf(m, "\n"); */
4469
4470 seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4471 seq_printf(m, "Map of attached LUNs: %8ph\n", &acb->dcb_map[0]);
4472 seq_printf(m, " %8ph\n", &acb->dcb_map[8]);
4473
4474 seq_puts(m,
4475 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4476
4477 dev = 0;
4478 list_for_each_entry(dcb, &acb->dcb_list, list) {
4479 int nego_period;
4480 seq_printf(m, "%02i %02i %02i ", dev, dcb->target_id,
4481 dcb->target_lun);
4482 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4483 YESNO(dcb->sync_offset);
4484 YESNO(dcb->sync_period & WIDE_SYNC);
4485 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4486 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4487 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4488 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4489 if (dcb->sync_offset)
4490 seq_printf(m, " %03i ns ", nego_period);
4491 else
4492 seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4493
4494 if (dcb->sync_offset & 0x0f) {
4495 spd = 1000 / (nego_period);
4496 spd1 = 1000 % (nego_period);
4497 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4498 seq_printf(m, " %2i.%1i M %02i ", spd, spd1,
4499 (dcb->sync_offset & 0x0f));
4500 } else
4501 seq_puts(m, " ");
4502
4503 /* Add more info ... */
4504 seq_printf(m, " %02i\n", dcb->max_command);
4505 dev++;
4506 }
4507
4508 if (timer_pending(&acb->waiting_timer))
4509 seq_puts(m, "Waiting queue timer running\n");
4510 else
4511 seq_putc(m, '\n');
4512
4513 list_for_each_entry(dcb, &acb->dcb_list, list) {
4514 struct ScsiReqBlk *srb;
4515 if (!list_empty(&dcb->srb_waiting_list))
4516 seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4517 dcb->target_id, dcb->target_lun,
4518 list_size(&dcb->srb_waiting_list));
4519 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4520 seq_printf(m, " %p", srb->cmd);
4521 if (!list_empty(&dcb->srb_going_list))
4522 seq_printf(m, "\nDCB (%02i-%i): Going : %i:",
4523 dcb->target_id, dcb->target_lun,
4524 list_size(&dcb->srb_going_list));
4525 list_for_each_entry(srb, &dcb->srb_going_list, list)
4526 seq_printf(m, " %p", srb->cmd);
4527 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4528 seq_putc(m, '\n');
4529 }
4530
4531 if (debug_enabled(DBG_1)) {
4532 seq_printf(m, "DCB list for ACB %p:\n", acb);
4533 list_for_each_entry(dcb, &acb->dcb_list, list) {
4534 seq_printf(m, "%p -> ", dcb);
4535 }
4536 seq_puts(m, "END\n");
4537 }
4538
4539 DC395x_UNLOCK_IO(acb->scsi_host, flags);
4540 return 0;
4541 }
4542
4543
4544 static const struct scsi_host_template dc395x_driver_template = {
4545 .module = THIS_MODULE,
4546 .proc_name = DC395X_NAME,
4547 .show_info = dc395x_show_info,
4548 .name = DC395X_BANNER " " DC395X_VERSION,
4549 .queuecommand = dc395x_queue_command,
4550 .sdev_init = dc395x_sdev_init,
4551 .sdev_destroy = dc395x_sdev_destroy,
4552 .can_queue = DC395x_MAX_CAN_QUEUE,
4553 .this_id = 7,
4554 .sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4555 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4556 .eh_abort_handler = dc395x_eh_abort,
4557 .eh_bus_reset_handler = dc395x_eh_bus_reset,
4558 .dma_boundary = PAGE_SIZE - 1,
4559 };
4560
4561
4562 /**
4563 * banner_display - Display banner on first instance of driver
4564 * initialized.
4565 **/
banner_display(void)4566 static void banner_display(void)
4567 {
4568 static int banner_done = 0;
4569 if (!banner_done)
4570 {
4571 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4572 banner_done = 1;
4573 }
4574 }
4575
4576
4577 /**
4578 * dc395x_init_one - Initialise a single instance of the adapter.
4579 *
4580 * The PCI layer will call this once for each instance of the adapter
4581 * that it finds in the system. The pci_dev strcuture indicates which
4582 * instance we are being called from.
4583 *
4584 * @dev: The PCI device to initialize.
4585 * @id: Looks like a pointer to the entry in our pci device table
4586 * that was actually matched by the PCI subsystem.
4587 *
4588 * Returns 0 on success, or an error code (-ve) on failure.
4589 **/
dc395x_init_one(struct pci_dev * dev,const struct pci_device_id * id)4590 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4591 {
4592 struct Scsi_Host *scsi_host = NULL;
4593 struct AdapterCtlBlk *acb = NULL;
4594 unsigned long io_port_base;
4595 unsigned int io_port_len;
4596 unsigned int irq;
4597
4598 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4599 banner_display();
4600
4601 if (pci_enable_device(dev))
4602 {
4603 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4604 return -ENODEV;
4605 }
4606 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4607 io_port_len = pci_resource_len(dev, 0);
4608 irq = dev->irq;
4609 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4610
4611 /* allocate scsi host information (includes out adapter) */
4612 scsi_host = scsi_host_alloc(&dc395x_driver_template,
4613 sizeof(struct AdapterCtlBlk));
4614 if (!scsi_host) {
4615 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4616 goto fail;
4617 }
4618 acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4619 acb->scsi_host = scsi_host;
4620 acb->dev = dev;
4621
4622 /* initialise the adapter and everything we need */
4623 if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4624 dprintkl(KERN_INFO, "adapter init failed\n");
4625 acb = NULL;
4626 goto fail;
4627 }
4628
4629 pci_set_master(dev);
4630
4631 /* get the scsi mid level to scan for new devices on the bus */
4632 if (scsi_add_host(scsi_host, &dev->dev)) {
4633 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4634 goto fail;
4635 }
4636 pci_set_drvdata(dev, scsi_host);
4637 scsi_scan_host(scsi_host);
4638
4639 return 0;
4640
4641 fail:
4642 if (acb != NULL)
4643 adapter_uninit(acb);
4644 if (scsi_host != NULL)
4645 scsi_host_put(scsi_host);
4646 pci_disable_device(dev);
4647 return -ENODEV;
4648 }
4649
4650
4651 /**
4652 * dc395x_remove_one - Called to remove a single instance of the
4653 * adapter.
4654 *
4655 * @dev: The PCI device to initialize.
4656 **/
dc395x_remove_one(struct pci_dev * dev)4657 static void dc395x_remove_one(struct pci_dev *dev)
4658 {
4659 struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4660 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4661
4662 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4663
4664 scsi_remove_host(scsi_host);
4665 adapter_uninit(acb);
4666 pci_disable_device(dev);
4667 scsi_host_put(scsi_host);
4668 }
4669
4670
4671 static const struct pci_device_id dc395x_pci_table[] = {
4672 {
4673 .vendor = PCI_VENDOR_ID_TEKRAM,
4674 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4675 .subvendor = PCI_ANY_ID,
4676 .subdevice = PCI_ANY_ID,
4677 },
4678 {} /* Terminating entry */
4679 };
4680 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4681
4682
4683 static struct pci_driver dc395x_driver = {
4684 .name = DC395X_NAME,
4685 .id_table = dc395x_pci_table,
4686 .probe = dc395x_init_one,
4687 .remove = dc395x_remove_one,
4688 };
4689 module_pci_driver(dc395x_driver);
4690
4691 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4692 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4693 MODULE_LICENSE("GPL");
4694