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/version.h>
81 #include <linux/init.h>
82 #include <linux/blkdev.h>
91 #define WD33C93_VERSION "1.26"
92 #define WD33C93_DATE "22/Feb/2003"
94 MODULE_AUTHOR("John Shifflett");
95 MODULE_DESCRIPTION("Generic WD33C93 SCSI driver");
96 MODULE_LICENSE("GPL");
99 * 'setup_strings' is a single string used to pass operating parameters and
100 * settings from the kernel/module command-line to the driver. 'setup_args[]'
101 * is an array of strings that define the compile-time default values for
102 * these settings. If Linux boots with an amiboot or insmod command-line,
103 * those settings are combined with 'setup_args[]'. Note that amiboot
104 * command-lines are prefixed with "wd33c93=" while insmod uses a
105 * "setup_strings=" prefix. The driver recognizes the following keywords
106 * (lower case required) and arguments:
108 * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with
109 * the 7 possible SCSI devices. Set a bit to negotiate for
110 * asynchronous transfers on that device. To maintain
111 * backwards compatibility, a command-line such as
112 * "wd33c93=255" will be automatically translated to
113 * "wd33c93=nosync:0xff".
114 * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is
115 * optional - if not present, same as "nodma:1".
116 * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer
117 * period. Default is 500; acceptable values are 250 - 1000.
118 * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them.
119 * x = 1 does 'adaptive' disconnects, which is the default
120 * and generally the best choice.
121 * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes
122 * various types of debug output to printed - see the DB_xxx
123 * defines in wd33c93.h
124 * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values
125 * would be from 8 through 20. Default is 8.
126 * - next -No argument. Used to separate blocks of keywords when
127 * there's more than one host adapter in the system.
130 * - Numeric arguments can be decimal or the '0x' form of hex notation. There
131 * _must_ be a colon between a keyword and its numeric argument, with no
133 * - Keywords are separated by commas, no spaces, in the standard kernel
134 * command-line manner.
135 * - A keyword in the 'nth' comma-separated command-line member will overwrite
136 * the 'nth' element of setup_args[]. A blank command-line member (in
137 * other words, a comma with no preceding keyword) will _not_ overwrite
138 * the corresponding setup_args[] element.
139 * - If a keyword is used more than once, the first one applies to the first
140 * SCSI host found, the second to the second card, etc, unless the 'next'
141 * keyword is used to change the order.
143 * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'):
144 * - wd33c93=nosync:255
147 * - wd33c93=disconnect:2,nosync:0x08,period:250
148 * - wd33c93=debug:0x1c
151 /* Normally, no defaults are specified */
152 static char *setup_args
[] = { "", "", "", "", "", "", "", "", "" };
154 static char *setup_strings
;
155 MODULE_PARM(setup_strings
, "s");
157 static void wd33c93_execute(struct Scsi_Host
*instance
);
159 #ifdef CONFIG_WD33C93_PIO
161 read_wd33c93(const wd33c93_regs regs
, uchar reg_num
)
165 outb(reg_num
, regs
.SASR
);
166 data
= inb(regs
.SCMD
);
170 static inline unsigned long
171 read_wd33c93_count(const wd33c93_regs regs
)
175 outb(WD_TRANSFER_COUNT_MSB
, regs
.SASR
);
176 value
= inb(regs
.SCMD
) << 16;
177 value
|= inb(regs
.SCMD
) << 8;
178 value
|= inb(regs
.SCMD
);
183 read_aux_stat(const wd33c93_regs regs
)
185 return inb(regs
.SASR
);
189 write_wd33c93(const wd33c93_regs regs
, uchar reg_num
, uchar value
)
191 outb(reg_num
, regs
.SASR
);
192 outb(value
, regs
.SCMD
);
196 write_wd33c93_count(const wd33c93_regs regs
, unsigned long value
)
198 outb(WD_TRANSFER_COUNT_MSB
, regs
.SASR
);
199 outb((value
>> 16) & 0xff, regs
.SCMD
);
200 outb((value
>> 8) & 0xff, regs
.SCMD
);
201 outb( value
& 0xff, regs
.SCMD
);
204 #define write_wd33c93_cmd(regs, cmd) \
205 write_wd33c93((regs), WD_COMMAND, (cmd))
208 write_wd33c93_cdb(const wd33c93_regs regs
, uint len
, uchar cmnd
[])
212 outb(WD_CDB_1
, regs
.SASR
);
213 for (i
=0; i
<len
; i
++)
214 outb(cmnd
[i
], regs
.SCMD
);
217 #else /* CONFIG_WD33C93_PIO */
219 read_wd33c93(const wd33c93_regs regs
, uchar reg_num
)
221 *regs
.SASR
= reg_num
;
227 read_wd33c93_count(const wd33c93_regs regs
)
231 *regs
.SASR
= WD_TRANSFER_COUNT_MSB
;
233 value
= *regs
.SCMD
<< 16;
234 value
|= *regs
.SCMD
<< 8;
241 read_aux_stat(const wd33c93_regs regs
)
247 write_wd33c93(const wd33c93_regs regs
, uchar reg_num
, uchar value
)
249 *regs
.SASR
= reg_num
;
256 write_wd33c93_count(const wd33c93_regs regs
, unsigned long value
)
258 *regs
.SASR
= WD_TRANSFER_COUNT_MSB
;
260 *regs
.SCMD
= value
>> 16;
261 *regs
.SCMD
= value
>> 8;
267 write_wd33c93_cmd(const wd33c93_regs regs
, uchar cmd
)
269 *regs
.SASR
= WD_COMMAND
;
276 write_wd33c93_cdb(const wd33c93_regs regs
, uint len
, uchar cmnd
[])
280 *regs
.SASR
= WD_CDB_1
;
281 for (i
= 0; i
< len
; i
++)
282 *regs
.SCMD
= cmnd
[i
];
284 #endif /* CONFIG_WD33C93_PIO */
287 read_1_byte(const wd33c93_regs regs
)
292 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
293 write_wd33c93_cmd(regs
, WD_CMD_TRANS_INFO
| 0x80);
295 asr
= read_aux_stat(regs
);
297 x
= read_wd33c93(regs
, WD_DATA
);
298 } while (!(asr
& ASR_INT
));
302 /* The 33c93 needs to be told which direction a command transfers its
303 * data; we use this function to figure it out. Returns true if there
304 * will be a DATA_OUT phase with this command, false otherwise.
305 * (Thanks to Joerg Dorchain for the research and suggestion.)
308 is_dir_out(Scsi_Cmnd
* cmd
)
310 return cmd
->sc_data_direction
== SCSI_DATA_WRITE
;
313 static struct sx_period sx_table
[] = {
326 round_period(unsigned int period
)
330 for (x
= 1; sx_table
[x
].period_ns
; x
++) {
331 if ((period
<= sx_table
[x
- 0].period_ns
) &&
332 (period
> sx_table
[x
- 1].period_ns
)) {
340 calc_sync_xfer(unsigned int period
, unsigned int offset
)
344 period
*= 4; /* convert SDTR code to ns */
345 result
= sx_table
[round_period(period
)].reg_value
;
346 result
|= (offset
< OPTIMUM_SX_OFF
) ? offset
: OPTIMUM_SX_OFF
;
351 wd33c93_queuecommand(Scsi_Cmnd
* cmd
, void (*done
) (Scsi_Cmnd
*))
353 struct WD33C93_hostdata
*hostdata
;
356 hostdata
= (struct WD33C93_hostdata
*) cmd
->device
->host
->hostdata
;
359 printk("Q-%d-%02x-%ld( ", cmd
->device
->id
, cmd
->cmnd
[0], cmd
->pid
))
361 /* Set up a few fields in the Scsi_Cmnd structure for our own use:
362 * - host_scribble is the pointer to the next cmd in the input queue
363 * - scsi_done points to the routine we call when a cmd is finished
364 * - result is what you'd expect
366 cmd
->host_scribble
= NULL
;
367 cmd
->scsi_done
= done
;
370 /* We use the Scsi_Pointer structure that's included with each command
371 * as a scratchpad (as it's intended to be used!). The handy thing about
372 * the SCp.xxx fields is that they're always associated with a given
373 * cmd, and are preserved across disconnect-reselect. This means we
374 * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages
375 * if we keep all the critical pointers and counters in SCp:
376 * - SCp.ptr is the pointer into the RAM buffer
377 * - SCp.this_residual is the size of that buffer
378 * - SCp.buffer points to the current scatter-gather buffer
379 * - SCp.buffers_residual tells us how many S.G. buffers there are
380 * - SCp.have_data_in is not used
381 * - SCp.sent_command is not used
382 * - SCp.phase records this command's SRCID_ER bit setting
386 cmd
->SCp
.buffer
= (struct scatterlist
*) cmd
->buffer
;
387 cmd
->SCp
.buffers_residual
= cmd
->use_sg
- 1;
388 cmd
->SCp
.ptr
= page_address(cmd
->SCp
.buffer
->page
) +
389 cmd
->SCp
.buffer
->offset
;
390 cmd
->SCp
.this_residual
= cmd
->SCp
.buffer
->length
;
392 cmd
->SCp
.buffer
= NULL
;
393 cmd
->SCp
.buffers_residual
= 0;
394 cmd
->SCp
.ptr
= (char *) cmd
->request_buffer
;
395 cmd
->SCp
.this_residual
= cmd
->request_bufflen
;
398 /* WD docs state that at the conclusion of a "LEVEL2" command, the
399 * status byte can be retrieved from the LUN register. Apparently,
400 * this is the case only for *uninterrupted* LEVEL2 commands! If
401 * there are any unexpected phases entered, even if they are 100%
402 * legal (different devices may choose to do things differently),
403 * the LEVEL2 command sequence is exited. This often occurs prior
404 * to receiving the status byte, in which case the driver does a
405 * status phase interrupt and gets the status byte on its own.
406 * While such a command can then be "resumed" (ie restarted to
407 * finish up as a LEVEL2 command), the LUN register will NOT be
408 * a valid status byte at the command's conclusion, and we must
409 * use the byte obtained during the earlier interrupt. Here, we
410 * preset SCp.Status to an illegal value (0xff) so that when
411 * this command finally completes, we can tell where the actual
412 * status byte is stored.
415 cmd
->SCp
.Status
= ILLEGAL_STATUS_BYTE
;
418 * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE
419 * commands are added to the head of the queue so that the desired
420 * sense data is not lost before REQUEST_SENSE executes.
423 spin_lock_irq(&hostdata
->lock
);
425 if (!(hostdata
->input_Q
) || (cmd
->cmnd
[0] == REQUEST_SENSE
)) {
426 cmd
->host_scribble
= (uchar
*) hostdata
->input_Q
;
427 hostdata
->input_Q
= cmd
;
428 } else { /* find the end of the queue */
429 for (tmp
= (Scsi_Cmnd
*) hostdata
->input_Q
; tmp
->host_scribble
;
430 tmp
= (Scsi_Cmnd
*) tmp
->host_scribble
) ;
431 tmp
->host_scribble
= (uchar
*) cmd
;
434 /* We know that there's at least one command in 'input_Q' now.
435 * Go see if any of them are runnable!
438 wd33c93_execute(cmd
->device
->host
);
440 DB(DB_QUEUE_COMMAND
, printk(")Q-%ld ", cmd
->pid
))
442 spin_unlock_irq(&hostdata
->lock
);
447 * This routine attempts to start a scsi command. If the host_card is
448 * already connected, we give up immediately. Otherwise, look through
449 * the input_Q, using the first command we find that's intended
450 * for a currently non-busy target/lun.
452 * wd33c93_execute() is always called with interrupts disabled or from
453 * the wd33c93_intr itself, which means that a wd33c93 interrupt
454 * cannot occur while we are in here.
457 wd33c93_execute(struct Scsi_Host
*instance
)
459 struct WD33C93_hostdata
*hostdata
=
460 (struct WD33C93_hostdata
*) instance
->hostdata
;
461 const wd33c93_regs regs
= hostdata
->regs
;
462 Scsi_Cmnd
*cmd
, *prev
;
464 DB(DB_EXECUTE
, printk("EX("))
465 if (hostdata
->selecting
|| hostdata
->connected
) {
466 DB(DB_EXECUTE
, printk(")EX-0 "))
471 * Search through the input_Q for a command destined
472 * for an idle target/lun.
475 cmd
= (Scsi_Cmnd
*) hostdata
->input_Q
;
478 if (!(hostdata
->busy
[cmd
->device
->id
] & (1 << cmd
->device
->lun
)))
481 cmd
= (Scsi_Cmnd
*) cmd
->host_scribble
;
484 /* quit if queue empty or all possible targets are busy */
487 DB(DB_EXECUTE
, printk(")EX-1 "))
491 /* remove command from queue */
494 prev
->host_scribble
= cmd
->host_scribble
;
496 hostdata
->input_Q
= (Scsi_Cmnd
*) cmd
->host_scribble
;
498 #ifdef PROC_STATISTICS
499 hostdata
->cmd_cnt
[cmd
->device
->id
]++;
503 * Start the selection process
507 write_wd33c93(regs
, WD_DESTINATION_ID
, cmd
->device
->id
);
509 write_wd33c93(regs
, WD_DESTINATION_ID
, cmd
->device
->id
| DSTID_DPD
);
511 /* Now we need to figure out whether or not this command is a good
512 * candidate for disconnect/reselect. We guess to the best of our
513 * ability, based on a set of hierarchical rules. When several
514 * devices are operating simultaneously, disconnects are usually
515 * an advantage. In a single device system, or if only 1 device
516 * is being accessed, transfers usually go faster if disconnects
519 * + Commands should NEVER disconnect if hostdata->disconnect =
520 * DIS_NEVER (this holds for tape drives also), and ALWAYS
521 * disconnect if hostdata->disconnect = DIS_ALWAYS.
522 * + Tape drive commands should always be allowed to disconnect.
523 * + Disconnect should be allowed if disconnected_Q isn't empty.
524 * + Commands should NOT disconnect if input_Q is empty.
525 * + Disconnect should be allowed if there are commands in input_Q
526 * for a different target/lun. In this case, the other commands
527 * should be made disconnect-able, if not already.
529 * I know, I know - this code would flunk me out of any
530 * "C Programming 101" class ever offered. But it's easy
531 * to change around and experiment with for now.
534 cmd
->SCp
.phase
= 0; /* assume no disconnect */
535 if (hostdata
->disconnect
== DIS_NEVER
)
537 if (hostdata
->disconnect
== DIS_ALWAYS
)
539 if (cmd
->device
->type
== 1) /* tape drive? */
541 if (hostdata
->disconnected_Q
) /* other commands disconnected? */
543 if (!(hostdata
->input_Q
)) /* input_Q empty? */
545 for (prev
= (Scsi_Cmnd
*) hostdata
->input_Q
; prev
;
546 prev
= (Scsi_Cmnd
*) prev
->host_scribble
) {
547 if ((prev
->device
->id
!= cmd
->device
->id
) ||
548 (prev
->device
->lun
!= cmd
->device
->lun
)) {
549 for (prev
= (Scsi_Cmnd
*) hostdata
->input_Q
; prev
;
550 prev
= (Scsi_Cmnd
*) prev
->host_scribble
)
561 #ifdef PROC_STATISTICS
562 hostdata
->disc_allowed_cnt
[cmd
->device
->id
]++;
567 write_wd33c93(regs
, WD_SOURCE_ID
, ((cmd
->SCp
.phase
) ? SRCID_ER
: 0));
569 write_wd33c93(regs
, WD_TARGET_LUN
, cmd
->device
->lun
);
570 write_wd33c93(regs
, WD_SYNCHRONOUS_TRANSFER
,
571 hostdata
->sync_xfer
[cmd
->device
->id
]);
572 hostdata
->busy
[cmd
->device
->id
] |= (1 << cmd
->device
->lun
);
574 if ((hostdata
->level2
== L2_NONE
) ||
575 (hostdata
->sync_stat
[cmd
->device
->id
] == SS_UNSET
)) {
578 * Do a 'Select-With-ATN' command. This will end with
579 * one of the following interrupts:
580 * CSR_RESEL_AM: failure - can try again later.
581 * CSR_TIMEOUT: failure - give up.
582 * CSR_SELECT: success - proceed.
585 hostdata
->selecting
= cmd
;
587 /* Every target has its own synchronous transfer setting, kept in the
588 * sync_xfer array, and a corresponding status byte in sync_stat[].
589 * Each target's sync_stat[] entry is initialized to SX_UNSET, and its
590 * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET
591 * means that the parameters are undetermined as yet, and that we
592 * need to send an SDTR message to this device after selection is
593 * complete: We set SS_FIRST to tell the interrupt routine to do so.
594 * If we've been asked not to try synchronous transfers on this
595 * target (and _all_ luns within it), we'll still send the SDTR message
596 * later, but at that time we'll negotiate for async by specifying a
597 * sync fifo depth of 0.
599 if (hostdata
->sync_stat
[cmd
->device
->id
] == SS_UNSET
)
600 hostdata
->sync_stat
[cmd
->device
->id
] = SS_FIRST
;
601 hostdata
->state
= S_SELECTING
;
602 write_wd33c93_count(regs
, 0); /* guarantee a DATA_PHASE interrupt */
603 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN
);
607 * Do a 'Select-With-ATN-Xfer' command. This will end with
608 * one of the following interrupts:
609 * CSR_RESEL_AM: failure - can try again later.
610 * CSR_TIMEOUT: failure - give up.
611 * anything else: success - proceed.
614 hostdata
->connected
= cmd
;
615 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0);
617 /* copy command_descriptor_block into WD chip
618 * (take advantage of auto-incrementing)
621 write_wd33c93_cdb(regs
, cmd
->cmd_len
, cmd
->cmnd
);
623 /* The wd33c93 only knows about Group 0, 1, and 5 commands when
624 * it's doing a 'select-and-transfer'. To be safe, we write the
625 * size of the CDB into the OWN_ID register for every case. This
626 * way there won't be problems with vendor-unique, audio, etc.
629 write_wd33c93(regs
, WD_OWN_ID
, cmd
->cmd_len
);
631 /* When doing a non-disconnect command with DMA, we can save
632 * ourselves a DATA phase interrupt later by setting everything
636 if ((cmd
->SCp
.phase
== 0) && (hostdata
->no_dma
== 0)) {
637 if (hostdata
->dma_setup(cmd
,
638 (is_dir_out(cmd
)) ? DATA_OUT_DIR
640 write_wd33c93_count(regs
, 0); /* guarantee a DATA_PHASE interrupt */
642 write_wd33c93_count(regs
,
643 cmd
->SCp
.this_residual
);
644 write_wd33c93(regs
, WD_CONTROL
,
645 CTRL_IDI
| CTRL_EDI
| CTRL_DMA
);
646 hostdata
->dma
= D_DMA_RUNNING
;
649 write_wd33c93_count(regs
, 0); /* guarantee a DATA_PHASE interrupt */
651 hostdata
->state
= S_RUNNING_LEVEL2
;
652 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
656 * Since the SCSI bus can handle only 1 connection at a time,
657 * we get out of here now. If the selection fails, or when
658 * the command disconnects, we'll come back to this routine
659 * to search the input_Q again...
663 printk("%s%ld)EX-2 ", (cmd
->SCp
.phase
) ? "d:" : "", cmd
->pid
))
667 transfer_pio(const wd33c93_regs regs
, uchar
* buf
, int cnt
,
668 int data_in_dir
, struct WD33C93_hostdata
*hostdata
)
673 printk("(%p,%d,%s:", buf
, cnt
, data_in_dir
? "in" : "out"))
675 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
676 write_wd33c93_count(regs
, cnt
);
677 write_wd33c93_cmd(regs
, WD_CMD_TRANS_INFO
);
680 asr
= read_aux_stat(regs
);
682 *buf
++ = read_wd33c93(regs
, WD_DATA
);
683 } while (!(asr
& ASR_INT
));
686 asr
= read_aux_stat(regs
);
688 write_wd33c93(regs
, WD_DATA
, *buf
++);
689 } while (!(asr
& ASR_INT
));
692 /* Note: we are returning with the interrupt UN-cleared.
693 * Since (presumably) an entire I/O operation has
694 * completed, the bus phase is probably different, and
695 * the interrupt routine will discover this when it
696 * responds to the uncleared int.
702 transfer_bytes(const wd33c93_regs regs
, Scsi_Cmnd
* cmd
, int data_in_dir
)
704 struct WD33C93_hostdata
*hostdata
;
705 unsigned long length
;
707 hostdata
= (struct WD33C93_hostdata
*) cmd
->device
->host
->hostdata
;
709 /* Normally, you'd expect 'this_residual' to be non-zero here.
710 * In a series of scatter-gather transfers, however, this
711 * routine will usually be called with 'this_residual' equal
712 * to 0 and 'buffers_residual' non-zero. This means that a
713 * previous transfer completed, clearing 'this_residual', and
714 * now we need to setup the next scatter-gather buffer as the
715 * source or destination for THIS transfer.
717 if (!cmd
->SCp
.this_residual
&& cmd
->SCp
.buffers_residual
) {
719 --cmd
->SCp
.buffers_residual
;
720 cmd
->SCp
.this_residual
= cmd
->SCp
.buffer
->length
;
721 cmd
->SCp
.ptr
= page_address(cmd
->SCp
.buffer
->page
) +
722 cmd
->SCp
.buffer
->offset
;
725 write_wd33c93(regs
, WD_SYNCHRONOUS_TRANSFER
,
726 hostdata
->sync_xfer
[cmd
->device
->id
]);
728 /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA.
729 * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns.
732 if (hostdata
->no_dma
|| hostdata
->dma_setup(cmd
, data_in_dir
)) {
733 #ifdef PROC_STATISTICS
736 transfer_pio(regs
, (uchar
*) cmd
->SCp
.ptr
,
737 cmd
->SCp
.this_residual
, data_in_dir
, hostdata
);
738 length
= cmd
->SCp
.this_residual
;
739 cmd
->SCp
.this_residual
= read_wd33c93_count(regs
);
740 cmd
->SCp
.ptr
+= (length
- cmd
->SCp
.this_residual
);
743 /* We are able to do DMA (in fact, the Amiga hardware is
744 * already going!), so start up the wd33c93 in DMA mode.
745 * We set 'hostdata->dma' = D_DMA_RUNNING so that when the
746 * transfer completes and causes an interrupt, we're
747 * reminded to tell the Amiga to shut down its end. We'll
748 * postpone the updating of 'this_residual' and 'ptr'
753 #ifdef PROC_STATISTICS
756 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_DMA
);
757 write_wd33c93_count(regs
, cmd
->SCp
.this_residual
);
759 if ((hostdata
->level2
>= L2_DATA
) ||
760 (hostdata
->level2
== L2_BASIC
&& cmd
->SCp
.phase
== 0)) {
761 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x45);
762 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
763 hostdata
->state
= S_RUNNING_LEVEL2
;
765 write_wd33c93_cmd(regs
, WD_CMD_TRANS_INFO
);
767 hostdata
->dma
= D_DMA_RUNNING
;
772 wd33c93_intr(struct Scsi_Host
*instance
)
774 struct WD33C93_hostdata
*hostdata
=
775 (struct WD33C93_hostdata
*) instance
->hostdata
;
776 const wd33c93_regs regs
= hostdata
->regs
;
777 Scsi_Cmnd
*patch
, *cmd
;
778 uchar asr
, sr
, phs
, id
, lun
, *ucp
, msg
;
779 unsigned long length
, flags
;
781 asr
= read_aux_stat(regs
);
782 if (!(asr
& ASR_INT
) || (asr
& ASR_BSY
))
785 spin_lock_irqsave(&hostdata
->lock
, flags
);
787 #ifdef PROC_STATISTICS
791 cmd
= (Scsi_Cmnd
*) hostdata
->connected
; /* assume we're connected */
792 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
); /* clear the interrupt */
793 phs
= read_wd33c93(regs
, WD_COMMAND_PHASE
);
795 DB(DB_INTR
, printk("{%02x:%02x-", asr
, sr
))
797 /* After starting a DMA transfer, the next interrupt
798 * is guaranteed to be in response to completion of
799 * the transfer. Since the Amiga DMA hardware runs in
800 * in an open-ended fashion, it needs to be told when
801 * to stop; do that here if D_DMA_RUNNING is true.
802 * Also, we have to update 'this_residual' and 'ptr'
803 * based on the contents of the TRANSFER_COUNT register,
804 * in case the device decided to do an intermediate
805 * disconnect (a device may do this if it has to do a
806 * seek, or just to be nice and let other devices have
807 * some bus time during long transfers). After doing
808 * whatever is needed, we go on and service the WD3393
809 * interrupt normally.
811 if (hostdata
->dma
== D_DMA_RUNNING
) {
813 printk("[%p/%d:", cmd
->SCp
.ptr
, cmd
->SCp
.this_residual
))
814 hostdata
->dma_stop(cmd
->device
->host
, cmd
, 1);
815 hostdata
->dma
= D_DMA_OFF
;
816 length
= cmd
->SCp
.this_residual
;
817 cmd
->SCp
.this_residual
= read_wd33c93_count(regs
);
818 cmd
->SCp
.ptr
+= (length
- cmd
->SCp
.this_residual
);
820 printk("%p/%d]", cmd
->SCp
.ptr
, cmd
->SCp
.this_residual
))
823 /* Respond to the specific WD3393 interrupt - there are quite a few! */
826 DB(DB_INTR
, printk("TIMEOUT"))
828 if (hostdata
->state
== S_RUNNING_LEVEL2
)
829 hostdata
->connected
= NULL
;
831 cmd
= (Scsi_Cmnd
*) hostdata
->selecting
; /* get a valid cmd */
832 hostdata
->selecting
= NULL
;
835 cmd
->result
= DID_NO_CONNECT
<< 16;
836 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
837 hostdata
->state
= S_UNCONNECTED
;
841 * There is a window of time within the scsi_done() path
842 * of execution where interrupts are turned back on full
843 * blast and left that way. During that time we could
844 * reconnect to a disconnected command, then we'd bomb
845 * out below. We could also end up executing two commands
846 * at _once_. ...just so you know why the restore_flags()
850 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
852 /* We are not connected to a target - check to see if there
853 * are commands waiting to be executed.
856 wd33c93_execute(instance
);
859 /* Note: this interrupt should not occur in a LEVEL2 command */
862 DB(DB_INTR
, printk("SELECT"))
863 hostdata
->connected
= cmd
=
864 (Scsi_Cmnd
*) hostdata
->selecting
;
865 hostdata
->selecting
= NULL
;
867 /* construct an IDENTIFY message with correct disconnect bit */
869 hostdata
->outgoing_msg
[0] = (0x80 | 0x00 | cmd
->device
->lun
);
871 hostdata
->outgoing_msg
[0] |= 0x40;
873 if (hostdata
->sync_stat
[cmd
->device
->id
] == SS_FIRST
) {
875 printk(" sending SDTR ");
878 hostdata
->sync_stat
[cmd
->device
->id
] = SS_WAITING
;
880 /* Tack on a 2nd message to ask about synchronous transfers. If we've
881 * been asked to do only asynchronous transfers on this device, we
882 * request a fifo depth of 0, which is equivalent to async - should
883 * solve the problems some people have had with GVP's Guru ROM.
886 hostdata
->outgoing_msg
[1] = EXTENDED_MESSAGE
;
887 hostdata
->outgoing_msg
[2] = 3;
888 hostdata
->outgoing_msg
[3] = EXTENDED_SDTR
;
889 if (hostdata
->no_sync
& (1 << cmd
->device
->id
)) {
890 hostdata
->outgoing_msg
[4] =
891 hostdata
->default_sx_per
/ 4;
892 hostdata
->outgoing_msg
[5] = 0;
894 hostdata
->outgoing_msg
[4] = OPTIMUM_SX_PER
/ 4;
895 hostdata
->outgoing_msg
[5] = OPTIMUM_SX_OFF
;
897 hostdata
->outgoing_len
= 6;
899 hostdata
->outgoing_len
= 1;
901 hostdata
->state
= S_CONNECTED
;
902 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
905 case CSR_XFER_DONE
| PHS_DATA_IN
:
906 case CSR_UNEXP
| PHS_DATA_IN
:
907 case CSR_SRV_REQ
| PHS_DATA_IN
:
909 printk("IN-%d.%d", cmd
->SCp
.this_residual
,
910 cmd
->SCp
.buffers_residual
))
911 transfer_bytes(regs
, cmd
, DATA_IN_DIR
);
912 if (hostdata
->state
!= S_RUNNING_LEVEL2
)
913 hostdata
->state
= S_CONNECTED
;
914 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
917 case CSR_XFER_DONE
| PHS_DATA_OUT
:
918 case CSR_UNEXP
| PHS_DATA_OUT
:
919 case CSR_SRV_REQ
| PHS_DATA_OUT
:
921 printk("OUT-%d.%d", cmd
->SCp
.this_residual
,
922 cmd
->SCp
.buffers_residual
))
923 transfer_bytes(regs
, cmd
, DATA_OUT_DIR
);
924 if (hostdata
->state
!= S_RUNNING_LEVEL2
)
925 hostdata
->state
= S_CONNECTED
;
926 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
929 /* Note: this interrupt should not occur in a LEVEL2 command */
931 case CSR_XFER_DONE
| PHS_COMMAND
:
932 case CSR_UNEXP
| PHS_COMMAND
:
933 case CSR_SRV_REQ
| PHS_COMMAND
:
934 DB(DB_INTR
, printk("CMND-%02x,%ld", cmd
->cmnd
[0], cmd
->pid
))
935 transfer_pio(regs
, cmd
->cmnd
, cmd
->cmd_len
, DATA_OUT_DIR
,
937 hostdata
->state
= S_CONNECTED
;
938 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
941 case CSR_XFER_DONE
| PHS_STATUS
:
942 case CSR_UNEXP
| PHS_STATUS
:
943 case CSR_SRV_REQ
| PHS_STATUS
:
944 DB(DB_INTR
, printk("STATUS="))
945 cmd
->SCp
.Status
= read_1_byte(regs
);
946 DB(DB_INTR
, printk("%02x", cmd
->SCp
.Status
))
947 if (hostdata
->level2
>= L2_BASIC
) {
948 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
); /* clear interrupt */
949 hostdata
->state
= S_RUNNING_LEVEL2
;
950 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x50);
951 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
953 hostdata
->state
= S_CONNECTED
;
955 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
958 case CSR_XFER_DONE
| PHS_MESS_IN
:
959 case CSR_UNEXP
| PHS_MESS_IN
:
960 case CSR_SRV_REQ
| PHS_MESS_IN
:
961 DB(DB_INTR
, printk("MSG_IN="))
963 msg
= read_1_byte(regs
);
964 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
); /* clear interrupt */
966 hostdata
->incoming_msg
[hostdata
->incoming_ptr
] = msg
;
967 if (hostdata
->incoming_msg
[0] == EXTENDED_MESSAGE
)
968 msg
= EXTENDED_MESSAGE
;
970 hostdata
->incoming_ptr
= 0;
972 cmd
->SCp
.Message
= msg
;
975 case COMMAND_COMPLETE
:
976 DB(DB_INTR
, printk("CCMP-%ld", cmd
->pid
))
977 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
978 hostdata
->state
= S_PRE_CMP_DISC
;
982 DB(DB_INTR
, printk("SDP"))
983 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
984 hostdata
->state
= S_CONNECTED
;
987 case RESTORE_POINTERS
:
988 DB(DB_INTR
, printk("RDP"))
989 if (hostdata
->level2
>= L2_BASIC
) {
990 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x45);
991 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
992 hostdata
->state
= S_RUNNING_LEVEL2
;
994 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
995 hostdata
->state
= S_CONNECTED
;
1000 DB(DB_INTR
, printk("DIS"))
1001 cmd
->device
->disconnect
= 1;
1002 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
1003 hostdata
->state
= S_PRE_TMP_DISC
;
1006 case MESSAGE_REJECT
:
1007 DB(DB_INTR
, printk("REJ"))
1011 if (hostdata
->sync_stat
[cmd
->device
->id
] == SS_WAITING
)
1012 hostdata
->sync_stat
[cmd
->device
->id
] = SS_SET
;
1013 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
1014 hostdata
->state
= S_CONNECTED
;
1017 case EXTENDED_MESSAGE
:
1018 DB(DB_INTR
, printk("EXT"))
1020 ucp
= hostdata
->incoming_msg
;
1023 printk("%02x", ucp
[hostdata
->incoming_ptr
]);
1025 /* Is this the last byte of the extended message? */
1027 if ((hostdata
->incoming_ptr
>= 2) &&
1028 (hostdata
->incoming_ptr
== (ucp
[1] + 1))) {
1030 switch (ucp
[2]) { /* what's the EXTENDED code? */
1032 id
= calc_sync_xfer(ucp
[3], ucp
[4]);
1033 if (hostdata
->sync_stat
[cmd
->device
->id
] !=
1036 /* A device has sent an unsolicited SDTR message; rather than go
1037 * through the effort of decoding it and then figuring out what
1038 * our reply should be, we're just gonna say that we have a
1039 * synchronous fifo depth of 0. This will result in asynchronous
1040 * transfers - not ideal but so much easier.
1041 * Actually, this is OK because it assures us that if we don't
1042 * specifically ask for sync transfers, we won't do any.
1045 write_wd33c93_cmd(regs
, WD_CMD_ASSERT_ATN
); /* want MESS_OUT */
1046 hostdata
->outgoing_msg
[0] =
1048 hostdata
->outgoing_msg
[1] = 3;
1049 hostdata
->outgoing_msg
[2] =
1051 hostdata
->outgoing_msg
[3] =
1052 hostdata
->default_sx_per
/
1054 hostdata
->outgoing_msg
[4] = 0;
1055 hostdata
->outgoing_len
= 5;
1056 hostdata
->sync_xfer
[cmd
->device
->id
] =
1057 calc_sync_xfer(hostdata
->
1061 hostdata
->sync_xfer
[cmd
->device
->id
] = id
;
1064 printk("sync_xfer=%02x",
1065 hostdata
->sync_xfer
[cmd
->device
->id
]);
1067 hostdata
->sync_stat
[cmd
->device
->id
] =
1069 write_wd33c93_cmd(regs
,
1071 hostdata
->state
= S_CONNECTED
;
1074 write_wd33c93_cmd(regs
, WD_CMD_ASSERT_ATN
); /* want MESS_OUT */
1075 printk("sending WDTR ");
1076 hostdata
->outgoing_msg
[0] =
1078 hostdata
->outgoing_msg
[1] = 2;
1079 hostdata
->outgoing_msg
[2] =
1081 hostdata
->outgoing_msg
[3] = 0; /* 8 bit transfer width */
1082 hostdata
->outgoing_len
= 4;
1083 write_wd33c93_cmd(regs
,
1085 hostdata
->state
= S_CONNECTED
;
1088 write_wd33c93_cmd(regs
, WD_CMD_ASSERT_ATN
); /* want MESS_OUT */
1090 ("Rejecting Unknown Extended Message(%02x). ",
1092 hostdata
->outgoing_msg
[0] =
1094 hostdata
->outgoing_len
= 1;
1095 write_wd33c93_cmd(regs
,
1097 hostdata
->state
= S_CONNECTED
;
1100 hostdata
->incoming_ptr
= 0;
1103 /* We need to read more MESS_IN bytes for the extended message */
1106 hostdata
->incoming_ptr
++;
1107 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
1108 hostdata
->state
= S_CONNECTED
;
1113 printk("Rejecting Unknown Message(%02x) ", msg
);
1114 write_wd33c93_cmd(regs
, WD_CMD_ASSERT_ATN
); /* want MESS_OUT */
1115 hostdata
->outgoing_msg
[0] = MESSAGE_REJECT
;
1116 hostdata
->outgoing_len
= 1;
1117 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
1118 hostdata
->state
= S_CONNECTED
;
1120 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1123 /* Note: this interrupt will occur only after a LEVEL2 command */
1125 case CSR_SEL_XFER_DONE
:
1127 /* Make sure that reselection is enabled at this point - it may
1128 * have been turned off for the command that just completed.
1131 write_wd33c93(regs
, WD_SOURCE_ID
, SRCID_ER
);
1133 DB(DB_INTR
, printk("SX-DONE-%ld", cmd
->pid
))
1134 cmd
->SCp
.Message
= COMMAND_COMPLETE
;
1135 lun
= read_wd33c93(regs
, WD_TARGET_LUN
);
1136 DB(DB_INTR
, printk(":%d.%d", cmd
->SCp
.Status
, lun
))
1137 hostdata
->connected
= NULL
;
1138 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1139 hostdata
->state
= S_UNCONNECTED
;
1140 if (cmd
->SCp
.Status
== ILLEGAL_STATUS_BYTE
)
1141 cmd
->SCp
.Status
= lun
;
1142 if (cmd
->cmnd
[0] == REQUEST_SENSE
1143 && cmd
->SCp
.Status
!= GOOD
)
1146 result
& 0x00ffff) | (DID_ERROR
<< 16);
1149 cmd
->SCp
.Status
| (cmd
->SCp
.Message
<< 8);
1150 cmd
->scsi_done(cmd
);
1152 /* We are no longer connected to a target - check to see if
1153 * there are commands waiting to be executed.
1155 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1156 wd33c93_execute(instance
);
1159 ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---",
1160 asr
, sr
, phs
, cmd
->pid
);
1161 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1165 /* Note: this interrupt will occur only after a LEVEL2 command */
1168 DB(DB_INTR
, printk("SDP"))
1169 hostdata
->state
= S_RUNNING_LEVEL2
;
1170 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x41);
1171 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
1172 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1175 case CSR_XFER_DONE
| PHS_MESS_OUT
:
1176 case CSR_UNEXP
| PHS_MESS_OUT
:
1177 case CSR_SRV_REQ
| PHS_MESS_OUT
:
1178 DB(DB_INTR
, printk("MSG_OUT="))
1180 /* To get here, we've probably requested MESSAGE_OUT and have
1181 * already put the correct bytes in outgoing_msg[] and filled
1182 * in outgoing_len. We simply send them out to the SCSI bus.
1183 * Sometimes we get MESSAGE_OUT phase when we're not expecting
1184 * it - like when our SDTR message is rejected by a target. Some
1185 * targets send the REJECT before receiving all of the extended
1186 * message, and then seem to go back to MESSAGE_OUT for a byte
1187 * or two. Not sure why, or if I'm doing something wrong to
1188 * cause this to happen. Regardless, it seems that sending
1189 * NOP messages in these situations results in no harm and
1190 * makes everyone happy.
1192 if (hostdata
->outgoing_len
== 0) {
1193 hostdata
->outgoing_len
= 1;
1194 hostdata
->outgoing_msg
[0] = NOP
;
1196 transfer_pio(regs
, hostdata
->outgoing_msg
,
1197 hostdata
->outgoing_len
, DATA_OUT_DIR
, hostdata
);
1198 DB(DB_INTR
, printk("%02x", hostdata
->outgoing_msg
[0]))
1199 hostdata
->outgoing_len
= 0;
1200 hostdata
->state
= S_CONNECTED
;
1201 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1204 case CSR_UNEXP_DISC
:
1206 /* I think I've seen this after a request-sense that was in response
1207 * to an error condition, but not sure. We certainly need to do
1208 * something when we get this interrupt - the question is 'what?'.
1209 * Let's think positively, and assume some command has finished
1210 * in a legal manner (like a command that provokes a request-sense),
1211 * so we treat it as a normal command-complete-disconnect.
1214 /* Make sure that reselection is enabled at this point - it may
1215 * have been turned off for the command that just completed.
1218 write_wd33c93(regs
, WD_SOURCE_ID
, SRCID_ER
);
1220 printk(" - Already disconnected! ");
1221 hostdata
->state
= S_UNCONNECTED
;
1222 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1225 DB(DB_INTR
, printk("UNEXP_DISC-%ld", cmd
->pid
))
1226 hostdata
->connected
= NULL
;
1227 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1228 hostdata
->state
= S_UNCONNECTED
;
1229 if (cmd
->cmnd
[0] == REQUEST_SENSE
&& cmd
->SCp
.Status
!= GOOD
)
1231 (cmd
->result
& 0x00ffff) | (DID_ERROR
<< 16);
1233 cmd
->result
= cmd
->SCp
.Status
| (cmd
->SCp
.Message
<< 8);
1234 cmd
->scsi_done(cmd
);
1236 /* We are no longer connected to a target - check to see if
1237 * there are commands waiting to be executed.
1239 /* look above for comments on scsi_done() */
1240 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1241 wd33c93_execute(instance
);
1246 /* Make sure that reselection is enabled at this point - it may
1247 * have been turned off for the command that just completed.
1250 write_wd33c93(regs
, WD_SOURCE_ID
, SRCID_ER
);
1251 DB(DB_INTR
, printk("DISC-%ld", cmd
->pid
))
1253 printk(" - Already disconnected! ");
1254 hostdata
->state
= S_UNCONNECTED
;
1256 switch (hostdata
->state
) {
1257 case S_PRE_CMP_DISC
:
1258 hostdata
->connected
= NULL
;
1259 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1260 hostdata
->state
= S_UNCONNECTED
;
1261 DB(DB_INTR
, printk(":%d", cmd
->SCp
.Status
))
1262 if (cmd
->cmnd
[0] == REQUEST_SENSE
1263 && cmd
->SCp
.Status
!= GOOD
)
1266 result
& 0x00ffff) | (DID_ERROR
<< 16);
1269 cmd
->SCp
.Status
| (cmd
->SCp
.Message
<< 8);
1270 cmd
->scsi_done(cmd
);
1272 case S_PRE_TMP_DISC
:
1273 case S_RUNNING_LEVEL2
:
1274 cmd
->host_scribble
= (uchar
*) hostdata
->disconnected_Q
;
1275 hostdata
->disconnected_Q
= cmd
;
1276 hostdata
->connected
= NULL
;
1277 hostdata
->state
= S_UNCONNECTED
;
1279 #ifdef PROC_STATISTICS
1280 hostdata
->disc_done_cnt
[cmd
->device
->id
]++;
1285 printk("*** Unexpected DISCONNECT interrupt! ***");
1286 hostdata
->state
= S_UNCONNECTED
;
1289 /* We are no longer connected to a target - check to see if
1290 * there are commands waiting to be executed.
1292 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1293 wd33c93_execute(instance
);
1298 DB(DB_INTR
, printk("RESEL%s", sr
== CSR_RESEL_AM
? "_AM" : ""))
1300 /* Old chips (pre -A ???) don't have advanced features and will
1301 * generate CSR_RESEL. In that case we have to extract the LUN the
1302 * hard way (see below).
1303 * First we have to make sure this reselection didn't
1304 * happen during Arbitration/Selection of some other device.
1305 * If yes, put losing command back on top of input_Q.
1307 if (hostdata
->level2
<= L2_NONE
) {
1309 if (hostdata
->selecting
) {
1310 cmd
= (Scsi_Cmnd
*) hostdata
->selecting
;
1311 hostdata
->selecting
= NULL
;
1312 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1313 cmd
->host_scribble
=
1314 (uchar
*) hostdata
->input_Q
;
1315 hostdata
->input_Q
= cmd
;
1323 hostdata
->busy
[cmd
->device
->id
] &=
1324 ~(1 << cmd
->device
->lun
);
1325 cmd
->host_scribble
=
1326 (uchar
*) hostdata
->input_Q
;
1327 hostdata
->input_Q
= cmd
;
1330 ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---",
1339 /* OK - find out which device reselected us. */
1341 id
= read_wd33c93(regs
, WD_SOURCE_ID
);
1344 /* and extract the lun from the ID message. (Note that we don't
1345 * bother to check for a valid message here - I guess this is
1346 * not the right way to go, but...)
1349 if (sr
== CSR_RESEL_AM
) {
1350 lun
= read_wd33c93(regs
, WD_DATA
);
1351 if (hostdata
->level2
< L2_RESELECT
)
1352 write_wd33c93_cmd(regs
, WD_CMD_NEGATE_ACK
);
1355 /* Old chip; wait for msgin phase to pick up the LUN. */
1356 for (lun
= 255; lun
; lun
--) {
1357 if ((asr
= read_aux_stat(regs
)) & ASR_INT
)
1361 if (!(asr
& ASR_INT
)) {
1363 ("wd33c93: Reselected without IDENTIFY\n");
1366 /* Verify this is a change to MSG_IN and read the message */
1367 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1368 if (sr
== (CSR_ABORT
| PHS_MESS_IN
) ||
1369 sr
== (CSR_UNEXP
| PHS_MESS_IN
) ||
1370 sr
== (CSR_SRV_REQ
| PHS_MESS_IN
)) {
1371 /* Got MSG_IN, grab target LUN */
1372 lun
= read_1_byte(regs
);
1373 /* Now we expect a 'paused with ACK asserted' int.. */
1374 asr
= read_aux_stat(regs
);
1375 if (!(asr
& ASR_INT
)) {
1377 asr
= read_aux_stat(regs
);
1378 if (!(asr
& ASR_INT
))
1380 ("wd33c93: No int after LUN on RESEL (%02x)\n",
1383 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1384 if (sr
!= CSR_MSGIN
)
1386 ("wd33c93: Not paused with ACK on RESEL (%02x)\n",
1389 write_wd33c93_cmd(regs
,
1393 ("wd33c93: Not MSG_IN on reselect (%02x)\n",
1400 /* Now we look for the command that's reconnecting. */
1402 cmd
= (Scsi_Cmnd
*) hostdata
->disconnected_Q
;
1405 if (id
== cmd
->device
->id
&& lun
== cmd
->device
->lun
)
1408 cmd
= (Scsi_Cmnd
*) cmd
->host_scribble
;
1411 /* Hmm. Couldn't find a valid command.... What to do? */
1415 ("---TROUBLE: target %d.%d not in disconnect queue---",
1417 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1421 /* Ok, found the command - now start it up again. */
1424 patch
->host_scribble
= cmd
->host_scribble
;
1426 hostdata
->disconnected_Q
=
1427 (Scsi_Cmnd
*) cmd
->host_scribble
;
1428 hostdata
->connected
= cmd
;
1430 /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]'
1431 * because these things are preserved over a disconnect.
1432 * But we DO need to fix the DPD bit so it's correct for this command.
1435 if (is_dir_out(cmd
))
1436 write_wd33c93(regs
, WD_DESTINATION_ID
, cmd
->device
->id
);
1438 write_wd33c93(regs
, WD_DESTINATION_ID
,
1439 cmd
->device
->id
| DSTID_DPD
);
1440 if (hostdata
->level2
>= L2_RESELECT
) {
1441 write_wd33c93_count(regs
, 0); /* we want a DATA_PHASE interrupt */
1442 write_wd33c93(regs
, WD_COMMAND_PHASE
, 0x45);
1443 write_wd33c93_cmd(regs
, WD_CMD_SEL_ATN_XFER
);
1444 hostdata
->state
= S_RUNNING_LEVEL2
;
1446 hostdata
->state
= S_CONNECTED
;
1448 DB(DB_INTR
, printk("-%ld", cmd
->pid
))
1449 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1453 printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr
, sr
, phs
);
1454 spin_unlock_irqrestore(&hostdata
->lock
, flags
);
1457 DB(DB_INTR
, printk("} "))
1462 reset_wd33c93(struct Scsi_Host
*instance
)
1464 struct WD33C93_hostdata
*hostdata
=
1465 (struct WD33C93_hostdata
*) instance
->hostdata
;
1466 const wd33c93_regs regs
= hostdata
->regs
;
1469 #ifdef CONFIG_SGI_IP22
1472 extern void sgiwd93_reset(unsigned long);
1473 /* wait 'til the chip gets some time for us */
1474 while ((read_aux_stat(regs
) & ASR_BSY
) && busycount
++ < 100)
1477 * there are scsi devices out there, which manage to lock up
1478 * the wd33c93 in a busy condition. In this state it won't
1479 * accept the reset command. The only way to solve this is to
1480 * give the chip a hardware reset (if possible). The code below
1481 * does this for the SGI Indy, where this is possible
1484 if (read_aux_stat(regs
) & ASR_BSY
)
1485 sgiwd93_reset(instance
->base
); /* yeah, give it the hard one */
1489 write_wd33c93(regs
, WD_OWN_ID
, OWNID_EAF
| OWNID_RAF
|
1490 instance
->this_id
| hostdata
->clock_freq
);
1491 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
1492 write_wd33c93(regs
, WD_SYNCHRONOUS_TRANSFER
,
1493 calc_sync_xfer(hostdata
->default_sx_per
/ 4,
1495 write_wd33c93(regs
, WD_COMMAND
, WD_CMD_RESET
);
1498 #ifdef CONFIG_MVME147_SCSI
1499 udelay(25); /* The old wd33c93 on MVME147 needs this, at least */
1502 while (!(read_aux_stat(regs
) & ASR_INT
))
1504 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1506 hostdata
->microcode
= read_wd33c93(regs
, WD_CDB_1
);
1508 hostdata
->chip
= C_WD33C93
;
1509 else if (sr
== 0x01) {
1510 write_wd33c93(regs
, WD_QUEUE_TAG
, 0xa5); /* any random number */
1511 sr
= read_wd33c93(regs
, WD_QUEUE_TAG
);
1513 hostdata
->chip
= C_WD33C93B
;
1514 write_wd33c93(regs
, WD_QUEUE_TAG
, 0);
1516 hostdata
->chip
= C_WD33C93A
;
1518 hostdata
->chip
= C_UNKNOWN_CHIP
;
1520 write_wd33c93(regs
, WD_TIMEOUT_PERIOD
, TIMEOUT_PERIOD_VALUE
);
1521 write_wd33c93(regs
, WD_CONTROL
, CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
1525 wd33c93_host_reset(Scsi_Cmnd
* SCpnt
)
1527 struct Scsi_Host
*instance
;
1528 struct WD33C93_hostdata
*hostdata
;
1531 instance
= SCpnt
->device
->host
;
1532 hostdata
= (struct WD33C93_hostdata
*) instance
->hostdata
;
1534 printk("scsi%d: reset. ", instance
->host_no
);
1535 disable_irq(instance
->irq
);
1537 hostdata
->dma_stop(instance
, NULL
, 0);
1538 for (i
= 0; i
< 8; i
++) {
1539 hostdata
->busy
[i
] = 0;
1540 hostdata
->sync_xfer
[i
] =
1541 calc_sync_xfer(DEFAULT_SX_PER
/ 4, DEFAULT_SX_OFF
);
1542 hostdata
->sync_stat
[i
] = SS_UNSET
; /* using default sync values */
1544 hostdata
->input_Q
= NULL
;
1545 hostdata
->selecting
= NULL
;
1546 hostdata
->connected
= NULL
;
1547 hostdata
->disconnected_Q
= NULL
;
1548 hostdata
->state
= S_UNCONNECTED
;
1549 hostdata
->dma
= D_DMA_OFF
;
1550 hostdata
->incoming_ptr
= 0;
1551 hostdata
->outgoing_len
= 0;
1553 reset_wd33c93(instance
);
1554 SCpnt
->result
= DID_RESET
<< 16;
1555 enable_irq(instance
->irq
);
1560 wd33c93_abort(Scsi_Cmnd
* cmd
)
1562 struct Scsi_Host
*instance
;
1563 struct WD33C93_hostdata
*hostdata
;
1565 Scsi_Cmnd
*tmp
, *prev
;
1567 disable_irq(cmd
->device
->host
->irq
);
1569 instance
= cmd
->device
->host
;
1570 hostdata
= (struct WD33C93_hostdata
*) instance
->hostdata
;
1571 regs
= hostdata
->regs
;
1574 * Case 1 : If the command hasn't been issued yet, we simply remove it
1578 tmp
= (Scsi_Cmnd
*) hostdata
->input_Q
;
1583 prev
->host_scribble
= cmd
->host_scribble
;
1586 (Scsi_Cmnd
*) cmd
->host_scribble
;
1587 cmd
->host_scribble
= NULL
;
1588 cmd
->result
= DID_ABORT
<< 16;
1590 ("scsi%d: Abort - removing command %ld from input_Q. ",
1591 instance
->host_no
, cmd
->pid
);
1592 enable_irq(cmd
->device
->host
->irq
);
1593 cmd
->scsi_done(cmd
);
1597 tmp
= (Scsi_Cmnd
*) tmp
->host_scribble
;
1601 * Case 2 : If the command is connected, we're going to fail the abort
1602 * and let the high level SCSI driver retry at a later time or
1605 * Timeouts, and therefore aborted commands, will be highly unlikely
1606 * and handling them cleanly in this situation would make the common
1607 * case of noresets less efficient, and would pollute our code. So,
1611 if (hostdata
->connected
== cmd
) {
1613 unsigned long timeout
;
1615 printk("scsi%d: Aborting connected command %ld - ",
1616 instance
->host_no
, cmd
->pid
);
1618 printk("stopping DMA - ");
1619 if (hostdata
->dma
== D_DMA_RUNNING
) {
1620 hostdata
->dma_stop(instance
, cmd
, 0);
1621 hostdata
->dma
= D_DMA_OFF
;
1624 printk("sending wd33c93 ABORT command - ");
1625 write_wd33c93(regs
, WD_CONTROL
,
1626 CTRL_IDI
| CTRL_EDI
| CTRL_POLLED
);
1627 write_wd33c93_cmd(regs
, WD_CMD_ABORT
);
1629 /* Now we have to attempt to flush out the FIFO... */
1631 printk("flushing fifo - ");
1634 asr
= read_aux_stat(regs
);
1636 read_wd33c93(regs
, WD_DATA
);
1637 } while (!(asr
& ASR_INT
) && timeout
-- > 0);
1638 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1640 ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ",
1641 asr
, sr
, read_wd33c93_count(regs
), timeout
);
1644 * Abort command processed.
1646 * We must disconnect.
1649 printk("sending wd33c93 DISCONNECT command - ");
1650 write_wd33c93_cmd(regs
, WD_CMD_DISCONNECT
);
1653 asr
= read_aux_stat(regs
);
1654 while ((asr
& ASR_CIP
) && timeout
-- > 0)
1655 asr
= read_aux_stat(regs
);
1656 sr
= read_wd33c93(regs
, WD_SCSI_STATUS
);
1657 printk("asr=%02x, sr=%02x.", asr
, sr
);
1659 hostdata
->busy
[cmd
->device
->id
] &= ~(1 << cmd
->device
->lun
);
1660 hostdata
->connected
= NULL
;
1661 hostdata
->state
= S_UNCONNECTED
;
1662 cmd
->result
= DID_ABORT
<< 16;
1665 wd33c93_execute(instance
);
1667 enable_irq(cmd
->device
->host
->irq
);
1668 cmd
->scsi_done(cmd
);
1673 * Case 3: If the command is currently disconnected from the bus,
1674 * we're not going to expend much effort here: Let's just return
1675 * an ABORT_SNOOZE and hope for the best...
1678 tmp
= (Scsi_Cmnd
*) hostdata
->disconnected_Q
;
1682 ("scsi%d: Abort - command %ld found on disconnected_Q - ",
1683 instance
->host_no
, cmd
->pid
);
1684 printk("Abort SNOOZE. ");
1685 enable_irq(cmd
->device
->host
->irq
);
1688 tmp
= (Scsi_Cmnd
*) tmp
->host_scribble
;
1692 * Case 4 : If we reached this point, the command was not found in any of
1695 * We probably reached this point because of an unlikely race condition
1696 * between the command completing successfully and the abortion code,
1697 * so we won't panic, but we will notify the user in case something really
1702 wd33c93_execute(instance
);
1704 enable_irq(cmd
->device
->host
->irq
);
1705 printk("scsi%d: warning : SCSI command probably completed successfully"
1706 " before abortion. ", instance
->host_no
);
1710 #define MAX_WD33C93_HOSTS 4
1711 #define MAX_SETUP_ARGS ((int)(sizeof(setup_args) / sizeof(char *)))
1712 #define SETUP_BUFFER_SIZE 200
1713 static char setup_buffer
[SETUP_BUFFER_SIZE
];
1714 static char setup_used
[MAX_SETUP_ARGS
];
1715 static int done_setup
= 0;
1718 wd33c93_setup(char *str
)
1723 /* The kernel does some processing of the command-line before calling
1724 * this function: If it begins with any decimal or hex number arguments,
1725 * ints[0] = how many numbers found and ints[1] through [n] are the values
1726 * themselves. str points to where the non-numeric arguments (if any)
1727 * start: We do our own parsing of those. We construct synthetic 'nosync'
1728 * keywords out of numeric args (to maintain compatibility with older
1729 * versions) and then add the rest of the arguments.
1735 strncpy(p1
, str
, SETUP_BUFFER_SIZE
- strlen(setup_buffer
));
1736 setup_buffer
[SETUP_BUFFER_SIZE
- 1] = '\0';
1739 while (*p1
&& (i
< MAX_SETUP_ARGS
)) {
1740 p2
= strchr(p1
, ',');
1752 for (i
= 0; i
< MAX_SETUP_ARGS
; i
++)
1758 __setup("wd33c93=", wd33c93_setup
);
1760 /* check_setup_args() returns index if key found, 0 if not
1763 check_setup_args(char *key
, int *flags
, int *val
, char *buf
)
1768 for (x
= 0; x
< MAX_SETUP_ARGS
; x
++) {
1771 if (!strncmp(setup_args
[x
], key
, strlen(key
)))
1773 if (!strncmp(setup_args
[x
], "next", strlen("next")))
1776 if (x
== MAX_SETUP_ARGS
)
1779 cp
= setup_args
[x
] + strlen(key
);
1784 if ((*cp
>= '0') && (*cp
<= '9')) {
1785 *val
= simple_strtoul(cp
, NULL
, 0);
1791 wd33c93_init(struct Scsi_Host
*instance
, const wd33c93_regs regs
,
1792 dma_setup_t setup
, dma_stop_t stop
, int clock_freq
)
1794 struct WD33C93_hostdata
*hostdata
;
1800 if (!done_setup
&& setup_strings
)
1801 wd33c93_setup(setup_strings
);
1803 hostdata
= (struct WD33C93_hostdata
*) instance
->hostdata
;
1805 hostdata
->regs
= regs
;
1806 hostdata
->clock_freq
= clock_freq
;
1807 hostdata
->dma_setup
= setup
;
1808 hostdata
->dma_stop
= stop
;
1809 hostdata
->dma_bounce_buffer
= NULL
;
1810 hostdata
->dma_bounce_len
= 0;
1811 for (i
= 0; i
< 8; i
++) {
1812 hostdata
->busy
[i
] = 0;
1813 hostdata
->sync_xfer
[i
] =
1814 calc_sync_xfer(DEFAULT_SX_PER
/ 4, DEFAULT_SX_OFF
);
1815 hostdata
->sync_stat
[i
] = SS_UNSET
; /* using default sync values */
1816 #ifdef PROC_STATISTICS
1817 hostdata
->cmd_cnt
[i
] = 0;
1818 hostdata
->disc_allowed_cnt
[i
] = 0;
1819 hostdata
->disc_done_cnt
[i
] = 0;
1822 hostdata
->input_Q
= NULL
;
1823 hostdata
->selecting
= NULL
;
1824 hostdata
->connected
= NULL
;
1825 hostdata
->disconnected_Q
= NULL
;
1826 hostdata
->state
= S_UNCONNECTED
;
1827 hostdata
->dma
= D_DMA_OFF
;
1828 hostdata
->level2
= L2_BASIC
;
1829 hostdata
->disconnect
= DIS_ADAPTIVE
;
1830 hostdata
->args
= DEBUG_DEFAULTS
;
1831 hostdata
->incoming_ptr
= 0;
1832 hostdata
->outgoing_len
= 0;
1833 hostdata
->default_sx_per
= DEFAULT_SX_PER
;
1834 hostdata
->no_sync
= 0xff; /* sync defaults to off */
1835 hostdata
->no_dma
= 0; /* default is DMA enabled */
1837 #ifdef PROC_INTERFACE
1838 hostdata
->proc
= PR_VERSION
| PR_INFO
| PR_STATISTICS
|
1839 PR_CONNECTED
| PR_INPUTQ
| PR_DISCQ
| PR_STOP
;
1840 #ifdef PROC_STATISTICS
1841 hostdata
->dma_cnt
= 0;
1842 hostdata
->pio_cnt
= 0;
1843 hostdata
->int_cnt
= 0;
1847 if (check_setup_args("nosync", &flags
, &val
, buf
))
1848 hostdata
->no_sync
= val
;
1850 if (check_setup_args("nodma", &flags
, &val
, buf
))
1851 hostdata
->no_dma
= (val
== -1) ? 1 : val
;
1853 if (check_setup_args("period", &flags
, &val
, buf
))
1854 hostdata
->default_sx_per
=
1855 sx_table
[round_period((unsigned int) val
)].period_ns
;
1857 if (check_setup_args("disconnect", &flags
, &val
, buf
)) {
1858 if ((val
>= DIS_NEVER
) && (val
<= DIS_ALWAYS
))
1859 hostdata
->disconnect
= val
;
1861 hostdata
->disconnect
= DIS_ADAPTIVE
;
1864 if (check_setup_args("level2", &flags
, &val
, buf
))
1865 hostdata
->level2
= val
;
1867 if (check_setup_args("debug", &flags
, &val
, buf
))
1868 hostdata
->args
= val
& DB_MASK
;
1870 if (check_setup_args("clock", &flags
, &val
, buf
)) {
1871 if (val
> 7 && val
< 11)
1872 val
= WD33C93_FS_8_10
;
1873 else if (val
> 11 && val
< 16)
1874 val
= WD33C93_FS_12_15
;
1875 else if (val
> 15 && val
< 21)
1876 val
= WD33C93_FS_16_20
;
1878 val
= WD33C93_FS_8_10
;
1879 hostdata
->clock_freq
= val
;
1882 if ((i
= check_setup_args("next", &flags
, &val
, buf
))) {
1884 setup_used
[--i
] = 1;
1886 #ifdef PROC_INTERFACE
1887 if (check_setup_args("proc", &flags
, &val
, buf
))
1888 hostdata
->proc
= val
;
1891 spin_lock_irq(&hostdata
->lock
);
1892 reset_wd33c93(instance
);
1893 spin_unlock_irq(&hostdata
->lock
);
1895 printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d",
1897 (hostdata
->chip
== C_WD33C93
) ? "WD33c93" : (hostdata
->chip
==
1899 "WD33c93A" : (hostdata
->chip
==
1900 C_WD33C93B
) ? "WD33c93B" : "unknown",
1901 hostdata
->microcode
, hostdata
->no_sync
, hostdata
->no_dma
);
1903 printk(" debug_flags=0x%02x\n", hostdata
->args
);
1905 printk(" debugging=OFF\n");
1907 printk(" setup_args=");
1908 for (i
= 0; i
< MAX_SETUP_ARGS
; i
++)
1909 printk("%s,", setup_args
[i
]);
1911 printk(" Version %s - %s, Compiled %s at %s\n",
1912 WD33C93_VERSION
, WD33C93_DATE
, __DATE__
, __TIME__
);
1916 wd33c93_proc_info(struct Scsi_Host
*instance
, char *buf
, char **start
, off_t off
, int len
, int in
)
1919 #ifdef PROC_INTERFACE
1923 struct WD33C93_hostdata
*hd
;
1926 static int stop
= 0;
1928 hd
= (struct WD33C93_hostdata
*) instance
->hostdata
;
1930 /* If 'in' is TRUE we need to _read_ the proc file. We accept the following
1931 * keywords (same format as command-line, but only ONE per read):
1943 if (!strncmp(bp
, "debug:", 6)) {
1945 hd
->args
= simple_strtoul(bp
, NULL
, 0) & DB_MASK
;
1946 } else if (!strncmp(bp
, "disconnect:", 11)) {
1948 x
= simple_strtoul(bp
, NULL
, 0);
1949 if (x
< DIS_NEVER
|| x
> DIS_ALWAYS
)
1952 } else if (!strncmp(bp
, "period:", 7)) {
1954 x
= simple_strtoul(bp
, NULL
, 0);
1955 hd
->default_sx_per
=
1956 sx_table
[round_period((unsigned int) x
)].period_ns
;
1957 } else if (!strncmp(bp
, "resync:", 7)) {
1959 x
= simple_strtoul(bp
, NULL
, 0);
1960 for (i
= 0; i
< 7; i
++)
1962 hd
->sync_stat
[i
] = SS_UNSET
;
1963 } else if (!strncmp(bp
, "proc:", 5)) {
1965 hd
->proc
= simple_strtoul(bp
, NULL
, 0);
1966 } else if (!strncmp(bp
, "nodma:", 6)) {
1968 hd
->no_dma
= simple_strtoul(bp
, NULL
, 0);
1969 } else if (!strncmp(bp
, "level2:", 7)) {
1971 hd
->level2
= simple_strtoul(bp
, NULL
, 0);
1976 spin_lock_irq(&hd
->lock
);
1979 if (hd
->proc
& PR_VERSION
) {
1980 sprintf(tbuf
, "\nVersion %s - %s. Compiled %s %s",
1981 WD33C93_VERSION
, WD33C93_DATE
, __DATE__
, __TIME__
);
1984 if (hd
->proc
& PR_INFO
) {
1985 sprintf(tbuf
, "\nclock_freq=%02x no_sync=%02x no_dma=%d",
1986 hd
->clock_freq
, hd
->no_sync
, hd
->no_dma
);
1988 strcat(bp
, "\nsync_xfer[] = ");
1989 for (x
= 0; x
< 7; x
++) {
1990 sprintf(tbuf
, "\t%02x", hd
->sync_xfer
[x
]);
1993 strcat(bp
, "\nsync_stat[] = ");
1994 for (x
= 0; x
< 7; x
++) {
1995 sprintf(tbuf
, "\t%02x", hd
->sync_stat
[x
]);
1999 #ifdef PROC_STATISTICS
2000 if (hd
->proc
& PR_STATISTICS
) {
2001 strcat(bp
, "\ncommands issued: ");
2002 for (x
= 0; x
< 7; x
++) {
2003 sprintf(tbuf
, "\t%ld", hd
->cmd_cnt
[x
]);
2006 strcat(bp
, "\ndisconnects allowed:");
2007 for (x
= 0; x
< 7; x
++) {
2008 sprintf(tbuf
, "\t%ld", hd
->disc_allowed_cnt
[x
]);
2011 strcat(bp
, "\ndisconnects done: ");
2012 for (x
= 0; x
< 7; x
++) {
2013 sprintf(tbuf
, "\t%ld", hd
->disc_done_cnt
[x
]);
2017 "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO",
2018 hd
->int_cnt
, hd
->dma_cnt
, hd
->pio_cnt
);
2022 if (hd
->proc
& PR_CONNECTED
) {
2023 strcat(bp
, "\nconnected: ");
2024 if (hd
->connected
) {
2025 cmd
= (Scsi_Cmnd
*) hd
->connected
;
2026 sprintf(tbuf
, " %ld-%d:%d(%02x)",
2027 cmd
->pid
, cmd
->device
->id
, cmd
->device
->lun
, cmd
->cmnd
[0]);
2031 if (hd
->proc
& PR_INPUTQ
) {
2032 strcat(bp
, "\ninput_Q: ");
2033 cmd
= (Scsi_Cmnd
*) hd
->input_Q
;
2035 sprintf(tbuf
, " %ld-%d:%d(%02x)",
2036 cmd
->pid
, cmd
->device
->id
, cmd
->device
->lun
, cmd
->cmnd
[0]);
2038 cmd
= (Scsi_Cmnd
*) cmd
->host_scribble
;
2041 if (hd
->proc
& PR_DISCQ
) {
2042 strcat(bp
, "\ndisconnected_Q:");
2043 cmd
= (Scsi_Cmnd
*) hd
->disconnected_Q
;
2045 sprintf(tbuf
, " %ld-%d:%d(%02x)",
2046 cmd
->pid
, cmd
->device
->id
, cmd
->device
->lun
, cmd
->cmnd
[0]);
2048 cmd
= (Scsi_Cmnd
*) cmd
->host_scribble
;
2052 spin_unlock_irq(&hd
->lock
);
2058 if (off
> 0x40000) /* ALWAYS stop after 256k bytes have been read */
2060 if (hd
->proc
& PR_STOP
) /* stop every other time */
2064 #else /* PROC_INTERFACE */
2068 #endif /* PROC_INTERFACE */
2073 wd33c93_release(void)
2077 EXPORT_SYMBOL(wd33c93_host_reset
);
2078 EXPORT_SYMBOL(wd33c93_init
);
2079 EXPORT_SYMBOL(wd33c93_release
);
2080 EXPORT_SYMBOL(wd33c93_abort
);
2081 EXPORT_SYMBOL(wd33c93_queuecommand
);
2082 EXPORT_SYMBOL(wd33c93_intr
);
2083 EXPORT_SYMBOL(wd33c93_proc_info
);