2 * Copyright (c) 1996 John Shifflett, GeoLog Consulting
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
18 * Drew Eckhardt's excellent 'Generic NCR5380' sources from Linux-PC
19 * provided much of the inspiration and some of the code for this
20 * driver. Everything I know about Amiga DMA was gleaned from careful
21 * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I
22 * borrowed shamelessly from all over that source. Thanks Hamish!
24 * _This_ driver is (I feel) an improvement over the old one in
27 * - Target Disconnection/Reconnection is now supported. Any
28 * system with more than one device active on the SCSI bus
29 * will benefit from this. The driver defaults to what I
30 * call 'adaptive disconnect' - meaning that each command
31 * is evaluated individually as to whether or not it should
32 * be run with the option to disconnect/reselect (if the
33 * device chooses), or as a "SCSI-bus-hog".
35 * - Synchronous data transfers are now supported. Because of
36 * a few devices that choke after telling the driver that
37 * they can do sync transfers, we don't automatically use
38 * this faster protocol - it can be enabled via the command-
39 * line on a device-by-device basis.
41 * - Runtime operating parameters can now be specified through
42 * the 'amiboot' or the 'insmod' command line. For amiboot do:
43 * "amiboot [usual stuff] wd33c93=blah,blah,blah"
44 * The defaults should be good for most people. See the comment
45 * for 'setup_strings' below for more details.
47 * - The old driver relied exclusively on what the Western Digital
48 * docs call "Combination Level 2 Commands", which are a great
49 * idea in that the CPU is relieved of a lot of interrupt
50 * overhead. However, by accepting a certain (user-settable)
51 * amount of additional interrupts, this driver achieves
52 * better control over the SCSI bus, and data transfers are
53 * almost as fast while being much easier to define, track,
58 * more speed. linked commands.
61 * People with bug reports, wish-lists, complaints, comments,
62 * or improvements are asked to pah-leeez email me (John Shifflett)
63 * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get
64 * this thing into as good a shape as possible, and I'm positive
65 * there are lots of lurking bugs and "Stupid Places".
69 * Added support for pre -A chips, which don't have advanced features
70 * and will generate CSR_RESEL rather than CSR_RESEL_AM.
71 * Richard Hirst <richard@sleepie.demon.co.uk> August 2000
74 #include <linux/config.h>
75 #include <linux/module.h>
77 #include <linux/sched.h>
78 #include <linux/string.h>
79 #include <linux/delay.h>
80 #include <linux/init.h>
81 #include <linux/interrupt.h>
82 #include <linux/blkdev.h>
84 #include <scsi/scsi.h>
85 #include <scsi/scsi_cmnd.h>
86 #include <scsi/scsi_device.h>
87 #include <scsi/scsi_host.h>
92 #define WD33C93_VERSION "1.26"
93 #define WD33C93_DATE "22/Feb/2003"
95 MODULE_AUTHOR("John Shifflett");
96 MODULE_DESCRIPTION("Generic WD33C93 SCSI driver");
97 MODULE_LICENSE("GPL");
100 * 'setup_strings' is a single string used to pass operating parameters and
101 * settings from the kernel/module command-line to the driver. 'setup_args[]'
102 * is an array of strings that define the compile-time default values for
103 * these settings. If Linux boots with an amiboot or insmod command-line,
104 * those settings are combined with 'setup_args[]'. Note that amiboot
105 * command-lines are prefixed with "wd33c93=" while insmod uses a
106 * "setup_strings=" prefix. The driver recognizes the following keywords
107 * (lower case required) and arguments:
109 * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with
110 * the 7 possible SCSI devices. Set a bit to negotiate for
111 * asynchronous transfers on that device. To maintain
112 * backwards compatibility, a command-line such as
113 * "wd33c93=255" will be automatically translated to
114 * "wd33c93=nosync:0xff".
115 * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is
116 * optional - if not present, same as "nodma:1".
117 * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer
118 * period. Default is 500; acceptable values are 250 - 1000.
119 * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them.
120 * x = 1 does 'adaptive' disconnects, which is the default
121 * and generally the best choice.
122 * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes
123 * various types of debug output to printed - see the DB_xxx
124 * defines in wd33c93.h
125 * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values
126 * would be from 8 through 20. Default is 8.
127 * - next -No argument. Used to separate blocks of keywords when
128 * there's more than one host adapter in the system.
131 * - Numeric arguments can be decimal or the '0x' form of hex notation. There
132 * _must_ be a colon between a keyword and its numeric argument, with no
134 * - Keywords are separated by commas, no spaces, in the standard kernel
135 * command-line manner.
136 * - A keyword in the 'nth' comma-separated command-line member will overwrite
137 * the 'nth' element of setup_args[]. A blank command-line member (in
138 * other words, a comma with no preceding keyword) will _not_ overwrite
139 * the corresponding setup_args[] element.
140 * - If a keyword is used more than once, the first one applies to the first
141 * SCSI host found, the second to the second card, etc, unless the 'next'
142 * keyword is used to change the order.
144 * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'):
145 * - wd33c93=nosync:255
148 * - wd33c93=disconnect:2,nosync:0x08,period:250
149 * - wd33c93=debug:0x1c
152 /* Normally, no defaults are specified */
153 static char *setup_args
[] = { "", "", "", "", "", "", "", "", "" };
155 static char *setup_strings
;
156 module_param(setup_strings
, charp
, 0);
158 static void wd33c93_execute(struct Scsi_Host
*instance
);
160 #ifdef CONFIG_WD33C93_PIO
162 read_wd33c93(const wd33c93_regs regs
, uchar reg_num
)
166 outb(reg_num
, regs
.SASR
);
167 data
= inb(regs
.SCMD
);
171 static inline unsigned long
172 read_wd33c93_count(const wd33c93_regs regs
)
176 outb(WD_TRANSFER_COUNT_MSB
, regs
.SASR
);
177 value
= inb(regs
.SCMD
) << 16;
178 value
|= inb(regs
.SCMD
) << 8;
179 value
|= inb(regs
.SCMD
);
184 read_aux_stat(const wd33c93_regs regs
)
186 return inb(regs
.SASR
);
190 write_wd33c93(const wd33c93_regs regs
, uchar reg_num
, uchar value
)
192 outb(reg_num
, regs
.SASR
);
193 outb(value
, regs
.SCMD
);
197 write_wd33c93_count(const wd33c93_regs regs
, unsigned long value
)
199 outb(WD_TRANSFER_COUNT_MSB
, regs
.SASR
);
200 outb((value
>> 16) & 0xff, regs
.SCMD
);
201 outb((value
>> 8) & 0xff, regs
.SCMD
);
202 outb( value
& 0xff, regs
.SCMD
);
205 #define write_wd33c93_cmd(regs, cmd) \
206 write_wd33c93((regs), WD_COMMAND, (cmd))
209 write_wd33c93_cdb(const wd33c93_regs regs
, uint len
, uchar cmnd
[])
213 outb(WD_CDB_1
, regs
.SASR
);
214 for (i
=0; i
<len
; i
++)
215 outb(cmnd
[i
], regs
.SCMD
);
218 #else /* CONFIG_WD33C93_PIO */
220 read_wd33c93(const wd33c93_regs regs
, uchar reg_num
)
222 *regs
.SASR
= reg_num
;
228 read_wd33c93_count(const wd33c93_regs regs
)
232 *regs
.SASR
= WD_TRANSFER_COUNT_MSB
;
234 value
= *regs
.SCMD
<< 16;
235 value
|= *regs
.SCMD
<< 8;
242 read_aux_stat(const wd33c93_regs regs
)
248 write_wd33c93(const wd33c93_regs regs
, uchar reg_num
, uchar value
)
250 *regs
.SASR
= reg_num
;
257 write_wd33c93_count(const wd33c93_regs regs
, unsigned long value
)
259 *regs
.SASR
= WD_TRANSFER_COUNT_MSB
;
261 *regs
.SCMD
= value
>> 16;
262 *regs
.SCMD
= value
>> 8;
268 write_wd33c93_cmd(const wd33c93_regs regs
, uchar cmd
)
270 *regs
.SASR
= WD_COMMAND
;
277 write_wd33c93_cdb(const wd33c93_regs regs
, uint len
, uchar cmnd
[])
281 *regs
.SASR
= WD_CDB_1
;
282 for (i
= 0; i
< len
; i
++)
283 *regs
.SCMD
= cmnd
[i
];
285 #endif /* CONFIG_WD33C93_PIO */
288 read_1_byte(const wd33c93_regs regs
)
293 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
294 write_wd33c93_cmd(regs
, WD_CMD_TRANS_INFO
| 0x80);
296 asr
= read_aux_stat(regs
);
298 x
= read_wd33c93(regs
, WD_DATA
);
299 } while (!(asr
& ASR_INT
));
303 static struct sx_period sx_table
[] = {
316 round_period(unsigned int period
)
320 for (x
= 1; sx_table
[x
].period_ns
; x
++) {
321 if ((period
<= sx_table
[x
- 0].period_ns
) &&
322 (period
> sx_table
[x
- 1].period_ns
)) {
330 calc_sync_xfer(unsigned int period
, unsigned int offset
)
334 period
*= 4; /* convert SDTR code to ns */
335 result
= sx_table
[round_period(period
)].reg_value
;
336 result
|= (offset
< OPTIMUM_SX_OFF
) ? offset
: OPTIMUM_SX_OFF
;
341 wd33c93_queuecommand(struct scsi_cmnd
*cmd
,
342 void (*done
)(struct scsi_cmnd
*))
344 struct WD33C93_hostdata
*hostdata
;
345 struct scsi_cmnd
*tmp
;
347 hostdata
= (struct WD33C93_hostdata
*) cmd
->device
->host
->hostdata
;
350 printk("Q-%d-%02x-%ld( ", cmd
->device
->id
, cmd
->cmnd
[0], cmd
->pid
))
352 /* Set up a few fields in the scsi_cmnd structure for our own use:
353 * - host_scribble is the pointer to the next cmd in the input queue
354 * - scsi_done points to the routine we call when a cmd is finished
355 * - result is what you'd expect
357 cmd
->host_scribble
= NULL
;
358 cmd
->scsi_done
= done
;
361 /* We use the Scsi_Pointer structure that's included with each command
362 * as a scratchpad (as it's intended to be used!). The handy thing about
363 * the SCp.xxx fields is that they're always associated with a given
364 * cmd, and are preserved across disconnect-reselect. This means we
365 * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages
366 * if we keep all the critical pointers and counters in SCp:
367 * - SCp.ptr is the pointer into the RAM buffer
368 * - SCp.this_residual is the size of that buffer
369 * - SCp.buffer points to the current scatter-gather buffer
370 * - SCp.buffers_residual tells us how many S.G. buffers there are
371 * - SCp.have_data_in is not used
372 * - SCp.sent_command is not used
373 * - SCp.phase records this command's SRCID_ER bit setting
377 cmd
->SCp
.buffer
= (struct scatterlist
*) cmd
->buffer
;
378 cmd
->SCp
.buffers_residual
= cmd
->use_sg
- 1;
379 cmd
->SCp
.ptr
= page_address(cmd
->SCp
.buffer
->page
) +
380 cmd
->SCp
.buffer
->offset
;
381 cmd
->SCp
.this_residual
= cmd
->SCp
.buffer
->length
;
383 cmd
->SCp
.buffer
= NULL
;
384 cmd
->SCp
.buffers_residual
= 0;
385 cmd
->SCp
.ptr
= (char *) cmd
->request_buffer
;
386 cmd
->SCp
.this_residual
= cmd
->request_bufflen
;
389 /* WD docs state that at the conclusion of a "LEVEL2" command, the
390 * status byte can be retrieved from the LUN register. Apparently,
391 * this is the case only for *uninterrupted* LEVEL2 commands! If
392 * there are any unexpected phases entered, even if they are 100%
393 * legal (different devices may choose to do things differently),
394 * the LEVEL2 command sequence is exited. This often occurs prior
395 * to receiving the status byte, in which case the driver does a
396 * status phase interrupt and gets the status byte on its own.
397 * While such a command can then be "resumed" (ie restarted to
398 * finish up as a LEVEL2 command), the LUN register will NOT be
399 * a valid status byte at the command's conclusion, and we must
400 * use the byte obtained during the earlier interrupt. Here, we
401 * preset SCp.Status to an illegal value (0xff) so that when
402 * this command finally completes, we can tell where the actual
403 * status byte is stored.
406 cmd
->SCp
.Status
= ILLEGAL_STATUS_BYTE
;
409 * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE
410 * commands are added to the head of the queue so that the desired
411 * sense data is not lost before REQUEST_SENSE executes.
414 spin_lock_irq(&hostdata
->lock
);
416 if (!(hostdata
->input_Q
) || (cmd
->cmnd
[0] == REQUEST_SENSE
)) {
417 cmd
->host_scribble
= (uchar
*) hostdata
->input_Q
;
418 hostdata
->input_Q
= cmd
;
419 } else { /* find the end of the queue */
420 for (tmp
= (struct scsi_cmnd
*) hostdata
->input_Q
;
422 tmp
= (struct scsi_cmnd
*) tmp
->host_scribble
) ;
423 tmp
->host_scribble
= (uchar
*) cmd
;
426 /* We know that there's at least one command in 'input_Q' now.
427 * Go see if any of them are runnable!
430 wd33c93_execute(cmd
->device
->host
);
432 DB(DB_QUEUE_COMMAND
, printk(")Q-%ld ", cmd
->pid
))
434 spin_unlock_irq(&hostdata
->lock
);
439 * This routine attempts to start a scsi command. If the host_card is
440 * already connected, we give up immediately. Otherwise, look through
441 * the input_Q, using the first command we find that's intended
442 * for a currently non-busy target/lun.
444 * wd33c93_execute() is always called with interrupts disabled or from
445 * the wd33c93_intr itself, which means that a wd33c93 interrupt
446 * cannot occur while we are in here.
449 wd33c93_execute(struct Scsi_Host
*instance
)
451 struct WD33C93_hostdata
*hostdata
=
452 (struct WD33C93_hostdata
*) instance
->hostdata
;
453 const wd33c93_regs regs
= hostdata
->regs
;
454 struct scsi_cmnd
*cmd
, *prev
;
456 DB(DB_EXECUTE
, printk("EX("))
457 if (hostdata
->selecting
|| hostdata
->connected
) {
458 DB(DB_EXECUTE
, printk(")EX-0 "))
463 * Search through the input_Q for a command destined
464 * for an idle target/lun.
467 cmd
= (struct scsi_cmnd
*) hostdata
->input_Q
;
470 if (!(hostdata
->busy
[cmd
->device
->id
] & (1 << cmd
->device
->lun
)))
473 cmd
= (struct scsi_cmnd
*) cmd
->host_scribble
;
476 /* quit if queue empty or all possible targets are busy */
479 DB(DB_EXECUTE
, printk(")EX-1 "))
483 /* remove command from queue */
486 prev
->host_scribble
= cmd
->host_scribble
;
488 hostdata
->input_Q
= (struct scsi_cmnd
*) cmd
->host_scribble
;
490 #ifdef PROC_STATISTICS
491 hostdata
->cmd_cnt
[cmd
->device
->id
]++;
495 * Start the selection process
498 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
499 write_wd33c93(regs
, WD_DESTINATION_ID
, cmd
->device
->id
);
501 write_wd33c93(regs
, WD_DESTINATION_ID
, cmd
->device
->id
| DSTID_DPD
);
503 /* Now we need to figure out whether or not this command is a good
504 * candidate for disconnect/reselect. We guess to the best of our
505 * ability, based on a set of hierarchical rules. When several
506 * devices are operating simultaneously, disconnects are usually
507 * an advantage. In a single device system, or if only 1 device
508 * is being accessed, transfers usually go faster if disconnects
511 * + Commands should NEVER disconnect if hostdata->disconnect =
512 * DIS_NEVER (this holds for tape drives also), and ALWAYS
513 * disconnect if hostdata->disconnect = DIS_ALWAYS.
514 * + Tape drive commands should always be allowed to disconnect.
515 * + Disconnect should be allowed if disconnected_Q isn't empty.
516 * + Commands should NOT disconnect if input_Q is empty.
517 * + Disconnect should be allowed if there are commands in input_Q
518 * for a different target/lun. In this case, the other commands
519 * should be made disconnect-able, if not already.
521 * I know, I know - this code would flunk me out of any
522 * "C Programming 101" class ever offered. But it's easy
523 * to change around and experiment with for now.
526 cmd
->SCp
.phase
= 0; /* assume no disconnect */
527 if (hostdata
->disconnect
== DIS_NEVER
)
529 if (hostdata
->disconnect
== DIS_ALWAYS
)
531 if (cmd
->device
->type
== 1) /* tape drive? */
533 if (hostdata
->disconnected_Q
) /* other commands disconnected? */
535 if (!(hostdata
->input_Q
)) /* input_Q empty? */
537 for (prev
= (struct scsi_cmnd
*) hostdata
->input_Q
; prev
;
538 prev
= (struct scsi_cmnd
*) prev
->host_scribble
) {
539 if ((prev
->device
->id
!= cmd
->device
->id
) ||
540 (prev
->device
->lun
!= cmd
->device
->lun
)) {
541 for (prev
= (struct scsi_cmnd
*) hostdata
->input_Q
; prev
;
542 prev
= (struct scsi_cmnd
*) prev
->host_scribble
)
553 #ifdef PROC_STATISTICS
554 hostdata
->disc_allowed_cnt
[cmd
->device
->id
]++;
559 write_wd33c93(regs
, WD_SOURCE_ID
, ((cmd
->SCp
.phase
) ? SRCID_ER
: 0));
561 write_wd33c93(regs
, WD_TARGET_LUN
, cmd
->device
->lun
);
562 write_wd33c93(regs
, WD_SYNCHRONOUS_TRANSFER
,
563 hostdata
->sync_xfer
[cmd
->device
->id
]);
564 hostdata
->busy
[cmd
->device
->id
] |= (1 << cmd
->device
->lun
);
566 if ((hostdata
->level2
== L2_NONE
) ||
567 (hostdata
->sync_stat
[cmd
->device
->id
] == SS_UNSET
)) {
570 * Do a 'Select-With-ATN' command. This will end with
571 * one of the following interrupts:
572 * CSR_RESEL_AM: failure - can try again later.
573 * CSR_TIMEOUT: failure - give up.
574 * CSR_SELECT: success - proceed.
577 hostdata
->selecting
= cmd
;
579 /* Every target has its own synchronous transfer setting, kept in the
580 * sync_xfer array, and a corresponding status byte in sync_stat[].
581 * Each target's sync_stat[] entry is initialized to SX_UNSET, and its
582 * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET
583 * means that the parameters are undetermined as yet, and that we
584 * need to send an SDTR message to this device after selection is
585 * complete: We set SS_FIRST to tell the interrupt routine to do so.
586 * If we've been asked not to try synchronous transfers on this
587 * target (and _all_ luns within it), we'll still send the SDTR message
588 * later, but at that time we'll negotiate for async by specifying a
589 * sync fifo depth of 0.
591 if (hostdata
->sync_stat
[cmd
->device
->id
] == SS_UNSET
)
592 hostdata
->sync_stat
[cmd
->device
->id
] = SS_FIRST
;
593 hostdata
->state
= S_SELECTING
;
594 write_wd33c93_count(regs
, 0); /* guarantee a DATA_PHASE interrupt */
595 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN
);
599 * Do a 'Select-With-ATN-Xfer' command. This will end with
600 * one of the following interrupts:
601 * CSR_RESEL_AM: failure - can try again later.
602 * CSR_TIMEOUT: failure - give up.
603 * anything else: success - proceed.
606 hostdata
->connected
= cmd
;
607 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0);
609 /* copy command_descriptor_block into WD chip
610 * (take advantage of auto-incrementing)
613 write_wd33c93_cdb(regs
, cmd
->cmd_len
, cmd
->cmnd
);
615 /* The wd33c93 only knows about Group 0, 1, and 5 commands when
616 * it's doing a 'select-and-transfer'. To be safe, we write the
617 * size of the CDB into the OWN_ID register for every case. This
618 * way there won't be problems with vendor-unique, audio, etc.
621 write_wd33c93(regs
, WD_OWN_ID
, cmd
->cmd_len
);
623 /* When doing a non-disconnect command with DMA, we can save
624 * ourselves a DATA phase interrupt later by setting everything
628 if ((cmd
->SCp
.phase
== 0) && (hostdata
->no_dma
== 0)) {
629 if (hostdata
->dma_setup(cmd
,
630 (cmd
->sc_data_direction
== DMA_TO_DEVICE
) ?
631 DATA_OUT_DIR
: DATA_IN_DIR
))
632 write_wd33c93_count(regs
, 0); /* guarantee a DATA_PHASE interrupt */
634 write_wd33c93_count(regs
,
635 cmd
->SCp
.this_residual
);
636 write_wd33c93(regs
, WD_CONTROL
,
637 CTRL_IDI
| CTRL_EDI
| CTRL_DMA
);
638 hostdata
->dma
= D_DMA_RUNNING
;
641 write_wd33c93_count(regs
, 0); /* guarantee a DATA_PHASE interrupt */
643 hostdata
->state
= S_RUNNING_LEVEL2
;
644 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
648 * Since the SCSI bus can handle only 1 connection at a time,
649 * we get out of here now. If the selection fails, or when
650 * the command disconnects, we'll come back to this routine
651 * to search the input_Q again...
655 printk("%s%ld)EX-2 ", (cmd
->SCp
.phase
) ? "d:" : "", cmd
->pid
))
659 transfer_pio(const wd33c93_regs regs
, uchar
* buf
, int cnt
,
660 int data_in_dir
, struct WD33C93_hostdata
*hostdata
)
665 printk("(%p,%d,%s:", buf
, cnt
, data_in_dir
? "in" : "out"))
667 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
668 write_wd33c93_count(regs
, cnt
);
669 write_wd33c93_cmd(regs
, WD_CMD_TRANS_INFO
);
672 asr
= read_aux_stat(regs
);
674 *buf
++ = read_wd33c93(regs
, WD_DATA
);
675 } while (!(asr
& ASR_INT
));
678 asr
= read_aux_stat(regs
);
680 write_wd33c93(regs
, WD_DATA
, *buf
++);
681 } while (!(asr
& ASR_INT
));
684 /* Note: we are returning with the interrupt UN-cleared.
685 * Since (presumably) an entire I/O operation has
686 * completed, the bus phase is probably different, and
687 * the interrupt routine will discover this when it
688 * responds to the uncleared int.
694 transfer_bytes(const wd33c93_regs regs
, struct scsi_cmnd
*cmd
,
697 struct WD33C93_hostdata
*hostdata
;
698 unsigned long length
;
700 hostdata
= (struct WD33C93_hostdata
*) cmd
->device
->host
->hostdata
;
702 /* Normally, you'd expect 'this_residual' to be non-zero here.
703 * In a series of scatter-gather transfers, however, this
704 * routine will usually be called with 'this_residual' equal
705 * to 0 and 'buffers_residual' non-zero. This means that a
706 * previous transfer completed, clearing 'this_residual', and
707 * now we need to setup the next scatter-gather buffer as the
708 * source or destination for THIS transfer.
710 if (!cmd
->SCp
.this_residual
&& cmd
->SCp
.buffers_residual
) {
712 --cmd
->SCp
.buffers_residual
;
713 cmd
->SCp
.this_residual
= cmd
->SCp
.buffer
->length
;
714 cmd
->SCp
.ptr
= page_address(cmd
->SCp
.buffer
->page
) +
715 cmd
->SCp
.buffer
->offset
;
718 write_wd33c93(regs
, WD_SYNCHRONOUS_TRANSFER
,
719 hostdata
->sync_xfer
[cmd
->device
->id
]);
721 /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA.
722 * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns.
725 if (hostdata
->no_dma
|| hostdata
->dma_setup(cmd
, data_in_dir
)) {
726 #ifdef PROC_STATISTICS
729 transfer_pio(regs
, (uchar
*) cmd
->SCp
.ptr
,
730 cmd
->SCp
.this_residual
, data_in_dir
, hostdata
);
731 length
= cmd
->SCp
.this_residual
;
732 cmd
->SCp
.this_residual
= read_wd33c93_count(regs
);
733 cmd
->SCp
.ptr
+= (length
- cmd
->SCp
.this_residual
);
736 /* We are able to do DMA (in fact, the Amiga hardware is
737 * already going!), so start up the wd33c93 in DMA mode.
738 * We set 'hostdata->dma' = D_DMA_RUNNING so that when the
739 * transfer completes and causes an interrupt, we're
740 * reminded to tell the Amiga to shut down its end. We'll
741 * postpone the updating of 'this_residual' and 'ptr'
746 #ifdef PROC_STATISTICS
749 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_DMA
);
750 write_wd33c93_count(regs
, cmd
->SCp
.this_residual
);
752 if ((hostdata
->level2
>= L2_DATA
) ||
753 (hostdata
->level2
== L2_BASIC
&& cmd
->SCp
.phase
== 0)) {
754 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x45);
755 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
756 hostdata
->state
= S_RUNNING_LEVEL2
;
758 write_wd33c93_cmd(regs
, WD_CMD_TRANS_INFO
);
760 hostdata
->dma
= D_DMA_RUNNING
;
765 wd33c93_intr(struct Scsi_Host
*instance
)
767 struct WD33C93_hostdata
*hostdata
=
768 (struct WD33C93_hostdata
*) instance
->hostdata
;
769 const wd33c93_regs regs
= hostdata
->regs
;
770 struct scsi_cmnd
*patch
, *cmd
;
771 uchar asr
, sr
, phs
, id
, lun
, *ucp
, msg
;
772 unsigned long length
, flags
;
774 asr
= read_aux_stat(regs
);
775 if (!(asr
& ASR_INT
) || (asr
& ASR_BSY
))
778 spin_lock_irqsave(&hostdata
->lock
, flags
);
780 #ifdef PROC_STATISTICS
784 cmd
= (struct scsi_cmnd
*) hostdata
->connected
; /* assume we're connected */
785 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
); /* clear the interrupt */
786 phs
= read_wd33c93(regs
, WD_COMMAND_PHASE
);
788 DB(DB_INTR
, printk("{%02x:%02x-", asr
, sr
))
790 /* After starting a DMA transfer, the next interrupt
791 * is guaranteed to be in response to completion of
792 * the transfer. Since the Amiga DMA hardware runs in
793 * in an open-ended fashion, it needs to be told when
794 * to stop; do that here if D_DMA_RUNNING is true.
795 * Also, we have to update 'this_residual' and 'ptr'
796 * based on the contents of the TRANSFER_COUNT register,
797 * in case the device decided to do an intermediate
798 * disconnect (a device may do this if it has to do a
799 * seek, or just to be nice and let other devices have
800 * some bus time during long transfers). After doing
801 * whatever is needed, we go on and service the WD3393
802 * interrupt normally.
804 if (hostdata
->dma
== D_DMA_RUNNING
) {
806 printk("[%p/%d:", cmd
->SCp
.ptr
, cmd
->SCp
.this_residual
))
807 hostdata
->dma_stop(cmd
->device
->host
, cmd
, 1);
808 hostdata
->dma
= D_DMA_OFF
;
809 length
= cmd
->SCp
.this_residual
;
810 cmd
->SCp
.this_residual
= read_wd33c93_count(regs
);
811 cmd
->SCp
.ptr
+= (length
- cmd
->SCp
.this_residual
);
813 printk("%p/%d]", cmd
->SCp
.ptr
, cmd
->SCp
.this_residual
))
816 /* Respond to the specific WD3393 interrupt - there are quite a few! */
819 DB(DB_INTR
, printk("TIMEOUT"))
821 if (hostdata
->state
== S_RUNNING_LEVEL2
)
822 hostdata
->connected
= NULL
;
824 cmd
= (struct scsi_cmnd
*) hostdata
->selecting
; /* get a valid cmd */
825 hostdata
->selecting
= NULL
;
828 cmd
->result
= DID_NO_CONNECT
<< 16;
829 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
830 hostdata
->state
= S_UNCONNECTED
;
834 * There is a window of time within the scsi_done() path
835 * of execution where interrupts are turned back on full
836 * blast and left that way. During that time we could
837 * reconnect to a disconnected command, then we'd bomb
838 * out below. We could also end up executing two commands
839 * at _once_. ...just so you know why the restore_flags()
843 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
845 /* We are not connected to a target - check to see if there
846 * are commands waiting to be executed.
849 wd33c93_execute(instance
);
852 /* Note: this interrupt should not occur in a LEVEL2 command */
855 DB(DB_INTR
, printk("SELECT"))
856 hostdata
->connected
= cmd
=
857 (struct scsi_cmnd
*) hostdata
->selecting
;
858 hostdata
->selecting
= NULL
;
860 /* construct an IDENTIFY message with correct disconnect bit */
862 hostdata
->outgoing_msg
[0] = (0x80 | 0x00 | cmd
->device
->lun
);
864 hostdata
->outgoing_msg
[0] |= 0x40;
866 if (hostdata
->sync_stat
[cmd
->device
->id
] == SS_FIRST
) {
868 printk(" sending SDTR ");
871 hostdata
->sync_stat
[cmd
->device
->id
] = SS_WAITING
;
873 /* Tack on a 2nd message to ask about synchronous transfers. If we've
874 * been asked to do only asynchronous transfers on this device, we
875 * request a fifo depth of 0, which is equivalent to async - should
876 * solve the problems some people have had with GVP's Guru ROM.
879 hostdata
->outgoing_msg
[1] = EXTENDED_MESSAGE
;
880 hostdata
->outgoing_msg
[2] = 3;
881 hostdata
->outgoing_msg
[3] = EXTENDED_SDTR
;
882 if (hostdata
->no_sync
& (1 << cmd
->device
->id
)) {
883 hostdata
->outgoing_msg
[4] =
884 hostdata
->default_sx_per
/ 4;
885 hostdata
->outgoing_msg
[5] = 0;
887 hostdata
->outgoing_msg
[4] = OPTIMUM_SX_PER
/ 4;
888 hostdata
->outgoing_msg
[5] = OPTIMUM_SX_OFF
;
890 hostdata
->outgoing_len
= 6;
892 hostdata
->outgoing_len
= 1;
894 hostdata
->state
= S_CONNECTED
;
895 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
898 case CSR_XFER_DONE
| PHS_DATA_IN
:
899 case CSR_UNEXP
| PHS_DATA_IN
:
900 case CSR_SRV_REQ
| PHS_DATA_IN
:
902 printk("IN-%d.%d", cmd
->SCp
.this_residual
,
903 cmd
->SCp
.buffers_residual
))
904 transfer_bytes(regs
, cmd
, DATA_IN_DIR
);
905 if (hostdata
->state
!= S_RUNNING_LEVEL2
)
906 hostdata
->state
= S_CONNECTED
;
907 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
910 case CSR_XFER_DONE
| PHS_DATA_OUT
:
911 case CSR_UNEXP
| PHS_DATA_OUT
:
912 case CSR_SRV_REQ
| PHS_DATA_OUT
:
914 printk("OUT-%d.%d", cmd
->SCp
.this_residual
,
915 cmd
->SCp
.buffers_residual
))
916 transfer_bytes(regs
, cmd
, DATA_OUT_DIR
);
917 if (hostdata
->state
!= S_RUNNING_LEVEL2
)
918 hostdata
->state
= S_CONNECTED
;
919 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
922 /* Note: this interrupt should not occur in a LEVEL2 command */
924 case CSR_XFER_DONE
| PHS_COMMAND
:
925 case CSR_UNEXP
| PHS_COMMAND
:
926 case CSR_SRV_REQ
| PHS_COMMAND
:
927 DB(DB_INTR
, printk("CMND-%02x,%ld", cmd
->cmnd
[0], cmd
->pid
))
928 transfer_pio(regs
, cmd
->cmnd
, cmd
->cmd_len
, DATA_OUT_DIR
,
930 hostdata
->state
= S_CONNECTED
;
931 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
934 case CSR_XFER_DONE
| PHS_STATUS
:
935 case CSR_UNEXP
| PHS_STATUS
:
936 case CSR_SRV_REQ
| PHS_STATUS
:
937 DB(DB_INTR
, printk("STATUS="))
938 cmd
->SCp
.Status
= read_1_byte(regs
);
939 DB(DB_INTR
, printk("%02x", cmd
->SCp
.Status
))
940 if (hostdata
->level2
>= L2_BASIC
) {
941 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
); /* clear interrupt */
943 hostdata
->state
= S_RUNNING_LEVEL2
;
944 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x50);
945 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
947 hostdata
->state
= S_CONNECTED
;
949 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
952 case CSR_XFER_DONE
| PHS_MESS_IN
:
953 case CSR_UNEXP
| PHS_MESS_IN
:
954 case CSR_SRV_REQ
| PHS_MESS_IN
:
955 DB(DB_INTR
, printk("MSG_IN="))
957 msg
= read_1_byte(regs
);
958 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
); /* clear interrupt */
961 hostdata
->incoming_msg
[hostdata
->incoming_ptr
] = msg
;
962 if (hostdata
->incoming_msg
[0] == EXTENDED_MESSAGE
)
963 msg
= EXTENDED_MESSAGE
;
965 hostdata
->incoming_ptr
= 0;
967 cmd
->SCp
.Message
= msg
;
970 case COMMAND_COMPLETE
:
971 DB(DB_INTR
, printk("CCMP-%ld", cmd
->pid
))
972 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
973 hostdata
->state
= S_PRE_CMP_DISC
;
977 DB(DB_INTR
, printk("SDP"))
978 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
979 hostdata
->state
= S_CONNECTED
;
982 case RESTORE_POINTERS
:
983 DB(DB_INTR
, printk("RDP"))
984 if (hostdata
->level2
>= L2_BASIC
) {
985 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x45);
986 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
987 hostdata
->state
= S_RUNNING_LEVEL2
;
989 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
990 hostdata
->state
= S_CONNECTED
;
995 DB(DB_INTR
, printk("DIS"))
996 cmd
->device
->disconnect
= 1;
997 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
998 hostdata
->state
= S_PRE_TMP_DISC
;
1001 case MESSAGE_REJECT
:
1002 DB(DB_INTR
, printk("REJ"))
1006 if (hostdata
->sync_stat
[cmd
->device
->id
] == SS_WAITING
)
1007 hostdata
->sync_stat
[cmd
->device
->id
] = SS_SET
;
1008 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
1009 hostdata
->state
= S_CONNECTED
;
1012 case EXTENDED_MESSAGE
:
1013 DB(DB_INTR
, printk("EXT"))
1015 ucp
= hostdata
->incoming_msg
;
1018 printk("%02x", ucp
[hostdata
->incoming_ptr
]);
1020 /* Is this the last byte of the extended message? */
1022 if ((hostdata
->incoming_ptr
>= 2) &&
1023 (hostdata
->incoming_ptr
== (ucp
[1] + 1))) {
1025 switch (ucp
[2]) { /* what's the EXTENDED code? */
1027 id
= calc_sync_xfer(ucp
[3], ucp
[4]);
1028 if (hostdata
->sync_stat
[cmd
->device
->id
] !=
1031 /* A device has sent an unsolicited SDTR message; rather than go
1032 * through the effort of decoding it and then figuring out what
1033 * our reply should be, we're just gonna say that we have a
1034 * synchronous fifo depth of 0. This will result in asynchronous
1035 * transfers - not ideal but so much easier.
1036 * Actually, this is OK because it assures us that if we don't
1037 * specifically ask for sync transfers, we won't do any.
1040 write_wd33c93_cmd(regs
, WD_CMD_ASSERT_ATN
); /* want MESS_OUT */
1041 hostdata
->outgoing_msg
[0] =
1043 hostdata
->outgoing_msg
[1] = 3;
1044 hostdata
->outgoing_msg
[2] =
1046 hostdata
->outgoing_msg
[3] =
1047 hostdata
->default_sx_per
/
1049 hostdata
->outgoing_msg
[4] = 0;
1050 hostdata
->outgoing_len
= 5;
1051 hostdata
->sync_xfer
[cmd
->device
->id
] =
1052 calc_sync_xfer(hostdata
->
1056 hostdata
->sync_xfer
[cmd
->device
->id
] = id
;
1059 printk("sync_xfer=%02x",
1060 hostdata
->sync_xfer
[cmd
->device
->id
]);
1062 hostdata
->sync_stat
[cmd
->device
->id
] =
1064 write_wd33c93_cmd(regs
,
1066 hostdata
->state
= S_CONNECTED
;
1069 write_wd33c93_cmd(regs
, WD_CMD_ASSERT_ATN
); /* want MESS_OUT */
1070 printk("sending WDTR ");
1071 hostdata
->outgoing_msg
[0] =
1073 hostdata
->outgoing_msg
[1] = 2;
1074 hostdata
->outgoing_msg
[2] =
1076 hostdata
->outgoing_msg
[3] = 0; /* 8 bit transfer width */
1077 hostdata
->outgoing_len
= 4;
1078 write_wd33c93_cmd(regs
,
1080 hostdata
->state
= S_CONNECTED
;
1083 write_wd33c93_cmd(regs
, WD_CMD_ASSERT_ATN
); /* want MESS_OUT */
1085 ("Rejecting Unknown Extended Message(%02x). ",
1087 hostdata
->outgoing_msg
[0] =
1089 hostdata
->outgoing_len
= 1;
1090 write_wd33c93_cmd(regs
,
1092 hostdata
->state
= S_CONNECTED
;
1095 hostdata
->incoming_ptr
= 0;
1098 /* We need to read more MESS_IN bytes for the extended message */
1101 hostdata
->incoming_ptr
++;
1102 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
1103 hostdata
->state
= S_CONNECTED
;
1108 printk("Rejecting Unknown Message(%02x) ", msg
);
1109 write_wd33c93_cmd(regs
, WD_CMD_ASSERT_ATN
); /* want MESS_OUT */
1110 hostdata
->outgoing_msg
[0] = MESSAGE_REJECT
;
1111 hostdata
->outgoing_len
= 1;
1112 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
1113 hostdata
->state
= S_CONNECTED
;
1115 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1118 /* Note: this interrupt will occur only after a LEVEL2 command */
1120 case CSR_SEL_XFER_DONE
:
1122 /* Make sure that reselection is enabled at this point - it may
1123 * have been turned off for the command that just completed.
1126 write_wd33c93(regs
, WD_SOURCE_ID
, SRCID_ER
);
1128 DB(DB_INTR
, printk("SX-DONE-%ld", cmd
->pid
))
1129 cmd
->SCp
.Message
= COMMAND_COMPLETE
;
1130 lun
= read_wd33c93(regs
, WD_TARGET_LUN
);
1131 DB(DB_INTR
, printk(":%d.%d", cmd
->SCp
.Status
, lun
))
1132 hostdata
->connected
= NULL
;
1133 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1134 hostdata
->state
= S_UNCONNECTED
;
1135 if (cmd
->SCp
.Status
== ILLEGAL_STATUS_BYTE
)
1136 cmd
->SCp
.Status
= lun
;
1137 if (cmd
->cmnd
[0] == REQUEST_SENSE
1138 && cmd
->SCp
.Status
!= GOOD
)
1141 result
& 0x00ffff) | (DID_ERROR
<< 16);
1144 cmd
->SCp
.Status
| (cmd
->SCp
.Message
<< 8);
1145 cmd
->scsi_done(cmd
);
1147 /* We are no longer connected to a target - check to see if
1148 * there are commands waiting to be executed.
1150 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1151 wd33c93_execute(instance
);
1154 ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---",
1155 asr
, sr
, phs
, cmd
->pid
);
1156 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1160 /* Note: this interrupt will occur only after a LEVEL2 command */
1163 DB(DB_INTR
, printk("SDP"))
1164 hostdata
->state
= S_RUNNING_LEVEL2
;
1165 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x41);
1166 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
1167 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1170 case CSR_XFER_DONE
| PHS_MESS_OUT
:
1171 case CSR_UNEXP
| PHS_MESS_OUT
:
1172 case CSR_SRV_REQ
| PHS_MESS_OUT
:
1173 DB(DB_INTR
, printk("MSG_OUT="))
1175 /* To get here, we've probably requested MESSAGE_OUT and have
1176 * already put the correct bytes in outgoing_msg[] and filled
1177 * in outgoing_len. We simply send them out to the SCSI bus.
1178 * Sometimes we get MESSAGE_OUT phase when we're not expecting
1179 * it - like when our SDTR message is rejected by a target. Some
1180 * targets send the REJECT before receiving all of the extended
1181 * message, and then seem to go back to MESSAGE_OUT for a byte
1182 * or two. Not sure why, or if I'm doing something wrong to
1183 * cause this to happen. Regardless, it seems that sending
1184 * NOP messages in these situations results in no harm and
1185 * makes everyone happy.
1187 if (hostdata
->outgoing_len
== 0) {
1188 hostdata
->outgoing_len
= 1;
1189 hostdata
->outgoing_msg
[0] = NOP
;
1191 transfer_pio(regs
, hostdata
->outgoing_msg
,
1192 hostdata
->outgoing_len
, DATA_OUT_DIR
, hostdata
);
1193 DB(DB_INTR
, printk("%02x", hostdata
->outgoing_msg
[0]))
1194 hostdata
->outgoing_len
= 0;
1195 hostdata
->state
= S_CONNECTED
;
1196 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1199 case CSR_UNEXP_DISC
:
1201 /* I think I've seen this after a request-sense that was in response
1202 * to an error condition, but not sure. We certainly need to do
1203 * something when we get this interrupt - the question is 'what?'.
1204 * Let's think positively, and assume some command has finished
1205 * in a legal manner (like a command that provokes a request-sense),
1206 * so we treat it as a normal command-complete-disconnect.
1209 /* Make sure that reselection is enabled at this point - it may
1210 * have been turned off for the command that just completed.
1213 write_wd33c93(regs
, WD_SOURCE_ID
, SRCID_ER
);
1215 printk(" - Already disconnected! ");
1216 hostdata
->state
= S_UNCONNECTED
;
1217 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1220 DB(DB_INTR
, printk("UNEXP_DISC-%ld", cmd
->pid
))
1221 hostdata
->connected
= NULL
;
1222 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1223 hostdata
->state
= S_UNCONNECTED
;
1224 if (cmd
->cmnd
[0] == REQUEST_SENSE
&& cmd
->SCp
.Status
!= GOOD
)
1226 (cmd
->result
& 0x00ffff) | (DID_ERROR
<< 16);
1228 cmd
->result
= cmd
->SCp
.Status
| (cmd
->SCp
.Message
<< 8);
1229 cmd
->scsi_done(cmd
);
1231 /* We are no longer connected to a target - check to see if
1232 * there are commands waiting to be executed.
1234 /* look above for comments on scsi_done() */
1235 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1236 wd33c93_execute(instance
);
1241 /* Make sure that reselection is enabled at this point - it may
1242 * have been turned off for the command that just completed.
1245 write_wd33c93(regs
, WD_SOURCE_ID
, SRCID_ER
);
1246 DB(DB_INTR
, printk("DISC-%ld", cmd
->pid
))
1248 printk(" - Already disconnected! ");
1249 hostdata
->state
= S_UNCONNECTED
;
1251 switch (hostdata
->state
) {
1252 case S_PRE_CMP_DISC
:
1253 hostdata
->connected
= NULL
;
1254 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1255 hostdata
->state
= S_UNCONNECTED
;
1256 DB(DB_INTR
, printk(":%d", cmd
->SCp
.Status
))
1257 if (cmd
->cmnd
[0] == REQUEST_SENSE
1258 && cmd
->SCp
.Status
!= GOOD
)
1261 result
& 0x00ffff) | (DID_ERROR
<< 16);
1264 cmd
->SCp
.Status
| (cmd
->SCp
.Message
<< 8);
1265 cmd
->scsi_done(cmd
);
1267 case S_PRE_TMP_DISC
:
1268 case S_RUNNING_LEVEL2
:
1269 cmd
->host_scribble
= (uchar
*) hostdata
->disconnected_Q
;
1270 hostdata
->disconnected_Q
= cmd
;
1271 hostdata
->connected
= NULL
;
1272 hostdata
->state
= S_UNCONNECTED
;
1274 #ifdef PROC_STATISTICS
1275 hostdata
->disc_done_cnt
[cmd
->device
->id
]++;
1280 printk("*** Unexpected DISCONNECT interrupt! ***");
1281 hostdata
->state
= S_UNCONNECTED
;
1284 /* We are no longer connected to a target - check to see if
1285 * there are commands waiting to be executed.
1287 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1288 wd33c93_execute(instance
);
1293 DB(DB_INTR
, printk("RESEL%s", sr
== CSR_RESEL_AM
? "_AM" : ""))
1295 /* Old chips (pre -A ???) don't have advanced features and will
1296 * generate CSR_RESEL. In that case we have to extract the LUN the
1297 * hard way (see below).
1298 * First we have to make sure this reselection didn't
1299 * happen during Arbitration/Selection of some other device.
1300 * If yes, put losing command back on top of input_Q.
1302 if (hostdata
->level2
<= L2_NONE
) {
1304 if (hostdata
->selecting
) {
1305 cmd
= (struct scsi_cmnd
*) hostdata
->selecting
;
1306 hostdata
->selecting
= NULL
;
1307 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1308 cmd
->host_scribble
=
1309 (uchar
*) hostdata
->input_Q
;
1310 hostdata
->input_Q
= cmd
;
1318 hostdata
->busy
[cmd
->device
->id
] &=
1319 ~(1 << cmd
->device
->lun
);
1320 cmd
->host_scribble
=
1321 (uchar
*) hostdata
->input_Q
;
1322 hostdata
->input_Q
= cmd
;
1325 ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---",
1334 /* OK - find out which device reselected us. */
1336 id
= read_wd33c93(regs
, WD_SOURCE_ID
);
1339 /* and extract the lun from the ID message. (Note that we don't
1340 * bother to check for a valid message here - I guess this is
1341 * not the right way to go, but...)
1344 if (sr
== CSR_RESEL_AM
) {
1345 lun
= read_wd33c93(regs
, WD_DATA
);
1346 if (hostdata
->level2
< L2_RESELECT
)
1347 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
1350 /* Old chip; wait for msgin phase to pick up the LUN. */
1351 for (lun
= 255; lun
; lun
--) {
1352 if ((asr
= read_aux_stat(regs
)) & ASR_INT
)
1356 if (!(asr
& ASR_INT
)) {
1358 ("wd33c93: Reselected without IDENTIFY\n");
1361 /* Verify this is a change to MSG_IN and read the message */
1362 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1364 if (sr
== (CSR_ABORT
| PHS_MESS_IN
) ||
1365 sr
== (CSR_UNEXP
| PHS_MESS_IN
) ||
1366 sr
== (CSR_SRV_REQ
| PHS_MESS_IN
)) {
1367 /* Got MSG_IN, grab target LUN */
1368 lun
= read_1_byte(regs
);
1369 /* Now we expect a 'paused with ACK asserted' int.. */
1370 asr
= read_aux_stat(regs
);
1371 if (!(asr
& ASR_INT
)) {
1373 asr
= read_aux_stat(regs
);
1374 if (!(asr
& ASR_INT
))
1376 ("wd33c93: No int after LUN on RESEL (%02x)\n",
1379 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1381 if (sr
!= CSR_MSGIN
)
1383 ("wd33c93: Not paused with ACK on RESEL (%02x)\n",
1386 write_wd33c93_cmd(regs
,
1390 ("wd33c93: Not MSG_IN on reselect (%02x)\n",
1397 /* Now we look for the command that's reconnecting. */
1399 cmd
= (struct scsi_cmnd
*) hostdata
->disconnected_Q
;
1402 if (id
== cmd
->device
->id
&& lun
== cmd
->device
->lun
)
1405 cmd
= (struct scsi_cmnd
*) cmd
->host_scribble
;
1408 /* Hmm. Couldn't find a valid command.... What to do? */
1412 ("---TROUBLE: target %d.%d not in disconnect queue---",
1414 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1418 /* Ok, found the command - now start it up again. */
1421 patch
->host_scribble
= cmd
->host_scribble
;
1423 hostdata
->disconnected_Q
=
1424 (struct scsi_cmnd
*) cmd
->host_scribble
;
1425 hostdata
->connected
= cmd
;
1427 /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]'
1428 * because these things are preserved over a disconnect.
1429 * But we DO need to fix the DPD bit so it's correct for this command.
1432 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
1433 write_wd33c93(regs
, WD_DESTINATION_ID
, cmd
->device
->id
);
1435 write_wd33c93(regs
, WD_DESTINATION_ID
,
1436 cmd
->device
->id
| DSTID_DPD
);
1437 if (hostdata
->level2
>= L2_RESELECT
) {
1438 write_wd33c93_count(regs
, 0); /* we want a DATA_PHASE interrupt */
1439 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x45);
1440 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
1441 hostdata
->state
= S_RUNNING_LEVEL2
;
1443 hostdata
->state
= S_CONNECTED
;
1445 DB(DB_INTR
, printk("-%ld", cmd
->pid
))
1446 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1450 printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr
, sr
, phs
);
1451 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1454 DB(DB_INTR
, printk("} "))
1459 reset_wd33c93(struct Scsi_Host
*instance
)
1461 struct WD33C93_hostdata
*hostdata
=
1462 (struct WD33C93_hostdata
*) instance
->hostdata
;
1463 const wd33c93_regs regs
= hostdata
->regs
;
1466 #ifdef CONFIG_SGI_IP22
1469 extern void sgiwd93_reset(unsigned long);
1470 /* wait 'til the chip gets some time for us */
1471 while ((read_aux_stat(regs
) & ASR_BSY
) && busycount
++ < 100)
1474 * there are scsi devices out there, which manage to lock up
1475 * the wd33c93 in a busy condition. In this state it won't
1476 * accept the reset command. The only way to solve this is to
1477 * give the chip a hardware reset (if possible). The code below
1478 * does this for the SGI Indy, where this is possible
1481 if (read_aux_stat(regs
) & ASR_BSY
)
1482 sgiwd93_reset(instance
->base
); /* yeah, give it the hard one */
1486 write_wd33c93(regs
, WD_OWN_ID
, OWNID_EAF
| OWNID_RAF
|
1487 instance
->this_id
| hostdata
->clock_freq
);
1488 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
1489 write_wd33c93(regs
, WD_SYNCHRONOUS_TRANSFER
,
1490 calc_sync_xfer(hostdata
->default_sx_per
/ 4,
1492 write_wd33c93(regs
, WD_COMMAND
, WD_CMD_RESET
);
1495 #ifdef CONFIG_MVME147_SCSI
1496 udelay(25); /* The old wd33c93 on MVME147 needs this, at least */
1499 while (!(read_aux_stat(regs
) & ASR_INT
))
1501 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1503 hostdata
->microcode
= read_wd33c93(regs
, WD_CDB_1
);
1505 hostdata
->chip
= C_WD33C93
;
1506 else if (sr
== 0x01) {
1507 write_wd33c93(regs
, WD_QUEUE_TAG
, 0xa5); /* any random number */
1508 sr
= read_wd33c93(regs
, WD_QUEUE_TAG
);
1510 hostdata
->chip
= C_WD33C93B
;
1511 write_wd33c93(regs
, WD_QUEUE_TAG
, 0);
1513 hostdata
->chip
= C_WD33C93A
;
1515 hostdata
->chip
= C_UNKNOWN_CHIP
;
1517 write_wd33c93(regs
, WD_TIMEOUT_PERIOD
, TIMEOUT_PERIOD_VALUE
);
1518 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
1522 wd33c93_host_reset(struct scsi_cmnd
* SCpnt
)
1524 struct Scsi_Host
*instance
;
1525 struct WD33C93_hostdata
*hostdata
;
1528 instance
= SCpnt
->device
->host
;
1529 hostdata
= (struct WD33C93_hostdata
*) instance
->hostdata
;
1531 printk("scsi%d: reset. ", instance
->host_no
);
1532 disable_irq(instance
->irq
);
1534 hostdata
->dma_stop(instance
, NULL
, 0);
1535 for (i
= 0; i
< 8; i
++) {
1536 hostdata
->busy
[i
] = 0;
1537 hostdata
->sync_xfer
[i
] =
1538 calc_sync_xfer(DEFAULT_SX_PER
/ 4, DEFAULT_SX_OFF
);
1539 hostdata
->sync_stat
[i
] = SS_UNSET
; /* using default sync values */
1541 hostdata
->input_Q
= NULL
;
1542 hostdata
->selecting
= NULL
;
1543 hostdata
->connected
= NULL
;
1544 hostdata
->disconnected_Q
= NULL
;
1545 hostdata
->state
= S_UNCONNECTED
;
1546 hostdata
->dma
= D_DMA_OFF
;
1547 hostdata
->incoming_ptr
= 0;
1548 hostdata
->outgoing_len
= 0;
1550 reset_wd33c93(instance
);
1551 SCpnt
->result
= DID_RESET
<< 16;
1552 enable_irq(instance
->irq
);
1557 wd33c93_abort(struct scsi_cmnd
* cmd
)
1559 struct Scsi_Host
*instance
;
1560 struct WD33C93_hostdata
*hostdata
;
1562 struct scsi_cmnd
*tmp
, *prev
;
1564 disable_irq(cmd
->device
->host
->irq
);
1566 instance
= cmd
->device
->host
;
1567 hostdata
= (struct WD33C93_hostdata
*) instance
->hostdata
;
1568 regs
= hostdata
->regs
;
1571 * Case 1 : If the command hasn't been issued yet, we simply remove it
1575 tmp
= (struct scsi_cmnd
*) hostdata
->input_Q
;
1580 prev
->host_scribble
= cmd
->host_scribble
;
1583 (struct scsi_cmnd
*) cmd
->host_scribble
;
1584 cmd
->host_scribble
= NULL
;
1585 cmd
->result
= DID_ABORT
<< 16;
1587 ("scsi%d: Abort - removing command %ld from input_Q. ",
1588 instance
->host_no
, cmd
->pid
);
1589 enable_irq(cmd
->device
->host
->irq
);
1590 cmd
->scsi_done(cmd
);
1594 tmp
= (struct scsi_cmnd
*) tmp
->host_scribble
;
1598 * Case 2 : If the command is connected, we're going to fail the abort
1599 * and let the high level SCSI driver retry at a later time or
1602 * Timeouts, and therefore aborted commands, will be highly unlikely
1603 * and handling them cleanly in this situation would make the common
1604 * case of noresets less efficient, and would pollute our code. So,
1608 if (hostdata
->connected
== cmd
) {
1610 unsigned long timeout
;
1612 printk("scsi%d: Aborting connected command %ld - ",
1613 instance
->host_no
, cmd
->pid
);
1615 printk("stopping DMA - ");
1616 if (hostdata
->dma
== D_DMA_RUNNING
) {
1617 hostdata
->dma_stop(instance
, cmd
, 0);
1618 hostdata
->dma
= D_DMA_OFF
;
1621 printk("sending wd33c93 ABORT command - ");
1622 write_wd33c93(regs
, WD_CONTROL
,
1623 CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
1624 write_wd33c93_cmd(regs
, WD_CMD_ABORT
);
1626 /* Now we have to attempt to flush out the FIFO... */
1628 printk("flushing fifo - ");
1631 asr
= read_aux_stat(regs
);
1633 read_wd33c93(regs
, WD_DATA
);
1634 } while (!(asr
& ASR_INT
) && timeout
-- > 0);
1635 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1637 ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ",
1638 asr
, sr
, read_wd33c93_count(regs
), timeout
);
1641 * Abort command processed.
1643 * We must disconnect.
1646 printk("sending wd33c93 DISCONNECT command - ");
1647 write_wd33c93_cmd(regs
, WD_CMD_DISCONNECT
);
1650 asr
= read_aux_stat(regs
);
1651 while ((asr
& ASR_CIP
) && timeout
-- > 0)
1652 asr
= read_aux_stat(regs
);
1653 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1654 printk("asr=%02x, sr=%02x.", asr
, sr
);
1656 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1657 hostdata
->connected
= NULL
;
1658 hostdata
->state
= S_UNCONNECTED
;
1659 cmd
->result
= DID_ABORT
<< 16;
1662 wd33c93_execute(instance
);
1664 enable_irq(cmd
->device
->host
->irq
);
1665 cmd
->scsi_done(cmd
);
1670 * Case 3: If the command is currently disconnected from the bus,
1671 * we're not going to expend much effort here: Let's just return
1672 * an ABORT_SNOOZE and hope for the best...
1675 tmp
= (struct scsi_cmnd
*) hostdata
->disconnected_Q
;
1679 ("scsi%d: Abort - command %ld found on disconnected_Q - ",
1680 instance
->host_no
, cmd
->pid
);
1681 printk("Abort SNOOZE. ");
1682 enable_irq(cmd
->device
->host
->irq
);
1685 tmp
= (struct scsi_cmnd
*) tmp
->host_scribble
;
1689 * Case 4 : If we reached this point, the command was not found in any of
1692 * We probably reached this point because of an unlikely race condition
1693 * between the command completing successfully and the abortion code,
1694 * so we won't panic, but we will notify the user in case something really
1699 wd33c93_execute(instance
);
1701 enable_irq(cmd
->device
->host
->irq
);
1702 printk("scsi%d: warning : SCSI command probably completed successfully"
1703 " before abortion. ", instance
->host_no
);
1707 #define MAX_WD33C93_HOSTS 4
1708 #define MAX_SETUP_ARGS ARRAY_SIZE(setup_args)
1709 #define SETUP_BUFFER_SIZE 200
1710 static char setup_buffer
[SETUP_BUFFER_SIZE
];
1711 static char setup_used
[MAX_SETUP_ARGS
];
1712 static int done_setup
= 0;
1715 wd33c93_setup(char *str
)
1720 /* The kernel does some processing of the command-line before calling
1721 * this function: If it begins with any decimal or hex number arguments,
1722 * ints[0] = how many numbers found and ints[1] through [n] are the values
1723 * themselves. str points to where the non-numeric arguments (if any)
1724 * start: We do our own parsing of those. We construct synthetic 'nosync'
1725 * keywords out of numeric args (to maintain compatibility with older
1726 * versions) and then add the rest of the arguments.
1732 strncpy(p1
, str
, SETUP_BUFFER_SIZE
- strlen(setup_buffer
));
1733 setup_buffer
[SETUP_BUFFER_SIZE
- 1] = '\0';
1736 while (*p1
&& (i
< MAX_SETUP_ARGS
)) {
1737 p2
= strchr(p1
, ',');
1749 for (i
= 0; i
< MAX_SETUP_ARGS
; i
++)
1755 __setup("wd33c93=", wd33c93_setup
);
1757 /* check_setup_args() returns index if key found, 0 if not
1760 check_setup_args(char *key
, int *flags
, int *val
, char *buf
)
1765 for (x
= 0; x
< MAX_SETUP_ARGS
; x
++) {
1768 if (!strncmp(setup_args
[x
], key
, strlen(key
)))
1770 if (!strncmp(setup_args
[x
], "next", strlen("next")))
1773 if (x
== MAX_SETUP_ARGS
)
1776 cp
= setup_args
[x
] + strlen(key
);
1781 if ((*cp
>= '0') && (*cp
<= '9')) {
1782 *val
= simple_strtoul(cp
, NULL
, 0);
1788 wd33c93_init(struct Scsi_Host
*instance
, const wd33c93_regs regs
,
1789 dma_setup_t setup
, dma_stop_t stop
, int clock_freq
)
1791 struct WD33C93_hostdata
*hostdata
;
1797 if (!done_setup
&& setup_strings
)
1798 wd33c93_setup(setup_strings
);
1800 hostdata
= (struct WD33C93_hostdata
*) instance
->hostdata
;
1802 hostdata
->regs
= regs
;
1803 hostdata
->clock_freq
= clock_freq
;
1804 hostdata
->dma_setup
= setup
;
1805 hostdata
->dma_stop
= stop
;
1806 hostdata
->dma_bounce_buffer
= NULL
;
1807 hostdata
->dma_bounce_len
= 0;
1808 for (i
= 0; i
< 8; i
++) {
1809 hostdata
->busy
[i
] = 0;
1810 hostdata
->sync_xfer
[i
] =
1811 calc_sync_xfer(DEFAULT_SX_PER
/ 4, DEFAULT_SX_OFF
);
1812 hostdata
->sync_stat
[i
] = SS_UNSET
; /* using default sync values */
1813 #ifdef PROC_STATISTICS
1814 hostdata
->cmd_cnt
[i
] = 0;
1815 hostdata
->disc_allowed_cnt
[i
] = 0;
1816 hostdata
->disc_done_cnt
[i
] = 0;
1819 hostdata
->input_Q
= NULL
;
1820 hostdata
->selecting
= NULL
;
1821 hostdata
->connected
= NULL
;
1822 hostdata
->disconnected_Q
= NULL
;
1823 hostdata
->state
= S_UNCONNECTED
;
1824 hostdata
->dma
= D_DMA_OFF
;
1825 hostdata
->level2
= L2_BASIC
;
1826 hostdata
->disconnect
= DIS_ADAPTIVE
;
1827 hostdata
->args
= DEBUG_DEFAULTS
;
1828 hostdata
->incoming_ptr
= 0;
1829 hostdata
->outgoing_len
= 0;
1830 hostdata
->default_sx_per
= DEFAULT_SX_PER
;
1831 hostdata
->no_sync
= 0xff; /* sync defaults to off */
1832 hostdata
->no_dma
= 0; /* default is DMA enabled */
1834 #ifdef PROC_INTERFACE
1835 hostdata
->proc
= PR_VERSION
| PR_INFO
| PR_STATISTICS
|
1836 PR_CONNECTED
| PR_INPUTQ
| PR_DISCQ
| PR_STOP
;
1837 #ifdef PROC_STATISTICS
1838 hostdata
->dma_cnt
= 0;
1839 hostdata
->pio_cnt
= 0;
1840 hostdata
->int_cnt
= 0;
1844 if (check_setup_args("nosync", &flags
, &val
, buf
))
1845 hostdata
->no_sync
= val
;
1847 if (check_setup_args("nodma", &flags
, &val
, buf
))
1848 hostdata
->no_dma
= (val
== -1) ? 1 : val
;
1850 if (check_setup_args("period", &flags
, &val
, buf
))
1851 hostdata
->default_sx_per
=
1852 sx_table
[round_period((unsigned int) val
)].period_ns
;
1854 if (check_setup_args("disconnect", &flags
, &val
, buf
)) {
1855 if ((val
>= DIS_NEVER
) && (val
<= DIS_ALWAYS
))
1856 hostdata
->disconnect
= val
;
1858 hostdata
->disconnect
= DIS_ADAPTIVE
;
1861 if (check_setup_args("level2", &flags
, &val
, buf
))
1862 hostdata
->level2
= val
;
1864 if (check_setup_args("debug", &flags
, &val
, buf
))
1865 hostdata
->args
= val
& DB_MASK
;
1867 if (check_setup_args("clock", &flags
, &val
, buf
)) {
1868 if (val
> 7 && val
< 11)
1869 val
= WD33C93_FS_8_10
;
1870 else if (val
> 11 && val
< 16)
1871 val
= WD33C93_FS_12_15
;
1872 else if (val
> 15 && val
< 21)
1873 val
= WD33C93_FS_16_20
;
1875 val
= WD33C93_FS_8_10
;
1876 hostdata
->clock_freq
= val
;
1879 if ((i
= check_setup_args("next", &flags
, &val
, buf
))) {
1881 setup_used
[--i
] = 1;
1883 #ifdef PROC_INTERFACE
1884 if (check_setup_args("proc", &flags
, &val
, buf
))
1885 hostdata
->proc
= val
;
1888 spin_lock_irq(&hostdata
->lock
);
1889 reset_wd33c93(instance
);
1890 spin_unlock_irq(&hostdata
->lock
);
1892 printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d",
1894 (hostdata
->chip
== C_WD33C93
) ? "WD33c93" : (hostdata
->chip
==
1896 "WD33c93A" : (hostdata
->chip
==
1897 C_WD33C93B
) ? "WD33c93B" : "unknown",
1898 hostdata
->microcode
, hostdata
->no_sync
, hostdata
->no_dma
);
1900 printk(" debug_flags=0x%02x\n", hostdata
->args
);
1902 printk(" debugging=OFF\n");
1904 printk(" setup_args=");
1905 for (i
= 0; i
< MAX_SETUP_ARGS
; i
++)
1906 printk("%s,", setup_args
[i
]);
1908 printk(" Version %s - %s, Compiled %s at %s\n",
1909 WD33C93_VERSION
, WD33C93_DATE
, __DATE__
, __TIME__
);
1913 wd33c93_proc_info(struct Scsi_Host
*instance
, char *buf
, char **start
, off_t off
, int len
, int in
)
1916 #ifdef PROC_INTERFACE
1920 struct WD33C93_hostdata
*hd
;
1921 struct scsi_cmnd
*cmd
;
1923 static int stop
= 0;
1925 hd
= (struct WD33C93_hostdata
*) instance
->hostdata
;
1927 /* If 'in' is TRUE we need to _read_ the proc file. We accept the following
1928 * keywords (same format as command-line, but only ONE per read):
1940 if (!strncmp(bp
, "debug:", 6)) {
1942 hd
->args
= simple_strtoul(bp
, NULL
, 0) & DB_MASK
;
1943 } else if (!strncmp(bp
, "disconnect:", 11)) {
1945 x
= simple_strtoul(bp
, NULL
, 0);
1946 if (x
< DIS_NEVER
|| x
> DIS_ALWAYS
)
1949 } else if (!strncmp(bp
, "period:", 7)) {
1951 x
= simple_strtoul(bp
, NULL
, 0);
1952 hd
->default_sx_per
=
1953 sx_table
[round_period((unsigned int) x
)].period_ns
;
1954 } else if (!strncmp(bp
, "resync:", 7)) {
1956 x
= simple_strtoul(bp
, NULL
, 0);
1957 for (i
= 0; i
< 7; i
++)
1959 hd
->sync_stat
[i
] = SS_UNSET
;
1960 } else if (!strncmp(bp
, "proc:", 5)) {
1962 hd
->proc
= simple_strtoul(bp
, NULL
, 0);
1963 } else if (!strncmp(bp
, "nodma:", 6)) {
1965 hd
->no_dma
= simple_strtoul(bp
, NULL
, 0);
1966 } else if (!strncmp(bp
, "level2:", 7)) {
1968 hd
->level2
= simple_strtoul(bp
, NULL
, 0);
1973 spin_lock_irq(&hd
->lock
);
1976 if (hd
->proc
& PR_VERSION
) {
1977 sprintf(tbuf
, "\nVersion %s - %s. Compiled %s %s",
1978 WD33C93_VERSION
, WD33C93_DATE
, __DATE__
, __TIME__
);
1981 if (hd
->proc
& PR_INFO
) {
1982 sprintf(tbuf
, "\nclock_freq=%02x no_sync=%02x no_dma=%d",
1983 hd
->clock_freq
, hd
->no_sync
, hd
->no_dma
);
1985 strcat(bp
, "\nsync_xfer[] = ");
1986 for (x
= 0; x
< 7; x
++) {
1987 sprintf(tbuf
, "\t%02x", hd
->sync_xfer
[x
]);
1990 strcat(bp
, "\nsync_stat[] = ");
1991 for (x
= 0; x
< 7; x
++) {
1992 sprintf(tbuf
, "\t%02x", hd
->sync_stat
[x
]);
1996 #ifdef PROC_STATISTICS
1997 if (hd
->proc
& PR_STATISTICS
) {
1998 strcat(bp
, "\ncommands issued: ");
1999 for (x
= 0; x
< 7; x
++) {
2000 sprintf(tbuf
, "\t%ld", hd
->cmd_cnt
[x
]);
2003 strcat(bp
, "\ndisconnects allowed:");
2004 for (x
= 0; x
< 7; x
++) {
2005 sprintf(tbuf
, "\t%ld", hd
->disc_allowed_cnt
[x
]);
2008 strcat(bp
, "\ndisconnects done: ");
2009 for (x
= 0; x
< 7; x
++) {
2010 sprintf(tbuf
, "\t%ld", hd
->disc_done_cnt
[x
]);
2014 "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO",
2015 hd
->int_cnt
, hd
->dma_cnt
, hd
->pio_cnt
);
2019 if (hd
->proc
& PR_CONNECTED
) {
2020 strcat(bp
, "\nconnected: ");
2021 if (hd
->connected
) {
2022 cmd
= (struct scsi_cmnd
*) hd
->connected
;
2023 sprintf(tbuf
, " %ld-%d:%d(%02x)",
2024 cmd
->pid
, cmd
->device
->id
, cmd
->device
->lun
, cmd
->cmnd
[0]);
2028 if (hd
->proc
& PR_INPUTQ
) {
2029 strcat(bp
, "\ninput_Q: ");
2030 cmd
= (struct scsi_cmnd
*) hd
->input_Q
;
2032 sprintf(tbuf
, " %ld-%d:%d(%02x)",
2033 cmd
->pid
, cmd
->device
->id
, cmd
->device
->lun
, cmd
->cmnd
[0]);
2035 cmd
= (struct scsi_cmnd
*) cmd
->host_scribble
;
2038 if (hd
->proc
& PR_DISCQ
) {
2039 strcat(bp
, "\ndisconnected_Q:");
2040 cmd
= (struct scsi_cmnd
*) hd
->disconnected_Q
;
2042 sprintf(tbuf
, " %ld-%d:%d(%02x)",
2043 cmd
->pid
, cmd
->device
->id
, cmd
->device
->lun
, cmd
->cmnd
[0]);
2045 cmd
= (struct scsi_cmnd
*) cmd
->host_scribble
;
2049 spin_unlock_irq(&hd
->lock
);
2055 if (off
> 0x40000) /* ALWAYS stop after 256k bytes have been read */
2057 if (hd
->proc
& PR_STOP
) /* stop every other time */
2061 #else /* PROC_INTERFACE */
2065 #endif /* PROC_INTERFACE */
2070 wd33c93_release(void)
2074 EXPORT_SYMBOL(wd33c93_host_reset
);
2075 EXPORT_SYMBOL(wd33c93_init
);
2076 EXPORT_SYMBOL(wd33c93_release
);
2077 EXPORT_SYMBOL(wd33c93_abort
);
2078 EXPORT_SYMBOL(wd33c93_queuecommand
);
2079 EXPORT_SYMBOL(wd33c93_intr
);
2080 EXPORT_SYMBOL(wd33c93_proc_info
);