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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / initio.c
blob1d39628ac947f5c21ea611b650ed8ab4a8de47b0
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /**************************************************************************
3 * Initio 9100 device driver for Linux.
4 *
5 * Copyright (c) 1994-1998 Initio Corporation
6 * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
7 * Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
8 * Copyright (c) 2007 Red Hat
9 *
10 *************************************************************************
11 *
12 * DESCRIPTION:
13 *
14 * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
15 * adapters
16 *
17 * 08/06/97 hc - v1.01h
18 * - Support inic-940 and inic-935
19 * 09/26/97 hc - v1.01i
20 * - Make correction from J.W. Schultz suggestion
21 * 10/13/97 hc - Support reset function
22 * 10/21/97 hc - v1.01j
23 * - Support 32 LUN (SCSI 3)
24 * 01/14/98 hc - v1.01k
25 * - Fix memory allocation problem
26 * 03/04/98 hc - v1.01l
27 * - Fix tape rewind which will hang the system problem
28 * - Set can_queue to initio_num_scb
29 * 06/25/98 hc - v1.01m
30 * - Get it work for kernel version >= 2.1.75
31 * - Dynamic assign SCSI bus reset holding time in initio_init()
32 * 07/02/98 hc - v1.01n
33 * - Support 0002134A
34 * 08/07/98 hc - v1.01o
35 * - Change the initio_abort_srb routine to use scsi_done. <01>
36 * 09/07/98 hl - v1.02
37 * - Change the INI9100U define and proc_dir_entry to
38 * reflect the newer Kernel 2.1.118, but the v1.o1o
39 * should work with Kernel 2.1.118.
40 * 09/20/98 wh - v1.02a
41 * - Support Abort command.
42 * - Handle reset routine.
43 * 09/21/98 hl - v1.03
44 * - remove comments.
45 * 12/09/98 bv - v1.03a
46 * - Removed unused code
47 * 12/13/98 bv - v1.03b
48 * - Remove cli() locking for kernels >= 2.1.95. This uses
49 * spinlocks to serialize access to the pSRB_head and
50 * pSRB_tail members of the HCS structure.
51 * 09/01/99 bv - v1.03d
52 * - Fixed a deadlock problem in SMP.
53 * 21/01/99 bv - v1.03e
54 * - Add support for the Domex 3192U PCI SCSI
55 * This is a slightly modified patch by
56 * Brian Macy <bmacy@sunshinecomputing.com>
57 * 22/02/99 bv - v1.03f
58 * - Didn't detect the INIC-950 in 2.0.x correctly.
59 * Now fixed.
60 * 05/07/99 bv - v1.03g
61 * - Changed the assumption that HZ = 100
62 * 10/17/03 mc - v1.04
63 * - added new DMA API support
64 * 06/01/04 jmd - v1.04a
65 * - Re-add reset_bus support
66 **************************************************************************/
67
68 #include <linux/module.h>
69 #include <linux/errno.h>
70 #include <linux/delay.h>
71 #include <linux/pci.h>
72 #include <linux/init.h>
73 #include <linux/blkdev.h>
74 #include <linux/spinlock.h>
75 #include <linux/stat.h>
76 #include <linux/kernel.h>
77 #include <linux/proc_fs.h>
78 #include <linux/string.h>
79 #include <linux/interrupt.h>
80 #include <linux/ioport.h>
81 #include <linux/slab.h>
82 #include <linux/jiffies.h>
83 #include <linux/dma-mapping.h>
84 #include <asm/io.h>
85
86 #include <scsi/scsi.h>
87 #include <scsi/scsi_cmnd.h>
88 #include <scsi/scsi_device.h>
89 #include <scsi/scsi_host.h>
90 #include <scsi/scsi_tcq.h>
91
92 #include "initio.h"
93
94 #define SENSE_SIZE 14
95
96 #define i91u_MAXQUEUE 2
97 #define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a"
98
99 #ifdef DEBUG_i91u
100 static unsigned int i91u_debug = DEBUG_DEFAULT;
101 #endif
102
103 static int initio_tag_enable = 1;
104
105 #ifdef DEBUG_i91u
106 static int setup_debug = 0;
107 #endif
108
109 static void i91uSCBPost(u8 * pHcb, u8 * pScb);
110
111 #define DEBUG_INTERRUPT 0
112 #define DEBUG_QUEUE 0
113 #define DEBUG_STATE 0
114 #define INT_DISC 0
115
116 /*--- forward references ---*/
117 static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
118 static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
119
120 static int tulip_main(struct initio_host * host);
121
122 static int initio_next_state(struct initio_host * host);
123 static int initio_state_1(struct initio_host * host);
124 static int initio_state_2(struct initio_host * host);
125 static int initio_state_3(struct initio_host * host);
126 static int initio_state_4(struct initio_host * host);
127 static int initio_state_5(struct initio_host * host);
128 static int initio_state_6(struct initio_host * host);
129 static int initio_state_7(struct initio_host * host);
130 static int initio_xfer_data_in(struct initio_host * host);
131 static int initio_xfer_data_out(struct initio_host * host);
132 static int initio_xpad_in(struct initio_host * host);
133 static int initio_xpad_out(struct initio_host * host);
134 static int initio_status_msg(struct initio_host * host);
135
136 static int initio_msgin(struct initio_host * host);
137 static int initio_msgin_sync(struct initio_host * host);
138 static int initio_msgin_accept(struct initio_host * host);
139 static int initio_msgout_reject(struct initio_host * host);
140 static int initio_msgin_extend(struct initio_host * host);
141
142 static int initio_msgout_ide(struct initio_host * host);
143 static int initio_msgout_abort_targ(struct initio_host * host);
144 static int initio_msgout_abort_tag(struct initio_host * host);
145
146 static int initio_bus_device_reset(struct initio_host * host);
147 static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
148 static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
149 static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
150 static int int_initio_busfree(struct initio_host * host);
151 static int int_initio_scsi_rst(struct initio_host * host);
152 static int int_initio_bad_seq(struct initio_host * host);
153 static int int_initio_resel(struct initio_host * host);
154 static int initio_sync_done(struct initio_host * host);
155 static int wdtr_done(struct initio_host * host);
156 static int wait_tulip(struct initio_host * host);
157 static int initio_wait_done_disc(struct initio_host * host);
158 static int initio_wait_disc(struct initio_host * host);
159 static void tulip_scsi(struct initio_host * host);
160 static int initio_post_scsi_rst(struct initio_host * host);
161
162 static void initio_se2_ew_en(unsigned long base);
163 static void initio_se2_ew_ds(unsigned long base);
164 static int initio_se2_rd_all(unsigned long base);
165 static void initio_se2_update_all(unsigned long base); /* setup default pattern */
166 static void initio_read_eeprom(unsigned long base);
167
168 /* ---- INTERNAL VARIABLES ---- */
169
170 static NVRAM i91unvram;
171 static NVRAM *i91unvramp;
172
173 static u8 i91udftNvRam[64] =
174 {
175 /*----------- header -----------*/
176 0x25, 0xc9, /* Signature */
177 0x40, /* Size */
178 0x01, /* Revision */
179 /* -- Host Adapter Structure -- */
180 0x95, /* ModelByte0 */
181 0x00, /* ModelByte1 */
182 0x00, /* ModelInfo */
183 0x01, /* NumOfCh */
184 NBC1_DEFAULT, /* BIOSConfig1 */
185 0, /* BIOSConfig2 */
186 0, /* HAConfig1 */
187 0, /* HAConfig2 */
188 /* SCSI channel 0 and target Structure */
189 7, /* SCSIid */
190 NCC1_DEFAULT, /* SCSIconfig1 */
191 0, /* SCSIconfig2 */
192 0x10, /* NumSCSItarget */
193
194 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
195 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
196 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
197 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
198
199 /* SCSI channel 1 and target Structure */
200 7, /* SCSIid */
201 NCC1_DEFAULT, /* SCSIconfig1 */
202 0, /* SCSIconfig2 */
203 0x10, /* NumSCSItarget */
204
205 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
206 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
207 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
208 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
209 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
210 0, 0}; /* - CheckSum - */
211
212
213 static u8 initio_rate_tbl[8] = /* fast 20 */
214 {
215 /* nanosecond divide by 4 */
216 12, /* 50ns, 20M */
217 18, /* 75ns, 13.3M */
218 25, /* 100ns, 10M */
219 31, /* 125ns, 8M */
220 37, /* 150ns, 6.6M */
221 43, /* 175ns, 5.7M */
222 50, /* 200ns, 5M */
223 62 /* 250ns, 4M */
224 };
225
226 static void initio_do_pause(unsigned amount)
227 {
228 /* Pause for amount jiffies */
229 unsigned long the_time = jiffies + amount;
230
231 while (time_before_eq(jiffies, the_time))
232 cpu_relax();
233 }
234
235 /*-- forward reference --*/
236
237 /******************************************************************
238 Input: instruction for Serial E2PROM
239
240 EX: se2_rd(0 call se2_instr() to send address and read command
241
242 StartBit OP_Code Address Data
243 --------- -------- ------------------ -------
244 1 1 , 0 A5,A4,A3,A2,A1,A0 D15-D0
245
246 +-----------------------------------------------------
247 |
248 CS -----+
249 +--+ +--+ +--+ +--+ +--+
250 ^ | ^ | ^ | ^ | ^ |
251 | | | | | | | | | |
252 CLK -------+ +--+ +--+ +--+ +--+ +--
253 (leading edge trigger)
254
255 +--1-----1--+
256 | SB OP | OP A5 A4
257 DI ----+ +--0------------------
258 (address and cmd sent to nvram)
259
260 -------------------------------------------+
261 |
262 DO +---
263 (data sent from nvram)
264
265
266 ******************************************************************/
267
268 /**
269 * initio_se2_instr - bitbang an instruction
270 * @base: Base of InitIO controller
271 * @instr: Instruction for serial E2PROM
272 *
273 * Bitbang an instruction out to the serial E2Prom
274 */
275
276 static void initio_se2_instr(unsigned long base, u8 instr)
277 {
278 int i;
279 u8 b;
280
281 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* cs+start bit */
282 udelay(30);
283 outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */
284 udelay(30);
285
286 for (i = 0; i < 8; i++) {
287 if (instr & 0x80)
288 b = SE2CS | SE2DO; /* -CLK+dataBit */
289 else
290 b = SE2CS; /* -CLK */
291 outb(b, base + TUL_NVRAM);
292 udelay(30);
293 outb(b | SE2CLK, base + TUL_NVRAM); /* +CLK */
294 udelay(30);
295 instr <<= 1;
296 }
297 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
298 udelay(30);
299 }
300
301
302 /**
303 * initio_se2_ew_en - Enable erase/write
304 * @base: Base address of InitIO controller
305 *
306 * Enable erase/write state of serial EEPROM
307 */
308 void initio_se2_ew_en(unsigned long base)
309 {
310 initio_se2_instr(base, 0x30); /* EWEN */
311 outb(0, base + TUL_NVRAM); /* -CS */
312 udelay(30);
313 }
314
315
316 /**
317 * initio_se2_ew_ds - Disable erase/write
318 * @base: Base address of InitIO controller
319 *
320 * Disable erase/write state of serial EEPROM
321 */
322 void initio_se2_ew_ds(unsigned long base)
323 {
324 initio_se2_instr(base, 0); /* EWDS */
325 outb(0, base + TUL_NVRAM); /* -CS */
326 udelay(30);
327 }
328
329
330 /**
331 * initio_se2_rd - read E2PROM word
332 * @base: Base of InitIO controller
333 * @addr: Address of word in E2PROM
334 *
335 * Read a word from the NV E2PROM device
336 */
337 static u16 initio_se2_rd(unsigned long base, u8 addr)
338 {
339 u8 instr, rb;
340 u16 val = 0;
341 int i;
342
343 instr = (u8) (addr | 0x80);
344 initio_se2_instr(base, instr); /* READ INSTR */
345
346 for (i = 15; i >= 0; i--) {
347 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
348 udelay(30);
349 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
350
351 /* sample data after the following edge of clock */
352 rb = inb(base + TUL_NVRAM);
353 rb &= SE2DI;
354 val += (rb << i);
355 udelay(30); /* 6/20/95 */
356 }
357
358 outb(0, base + TUL_NVRAM); /* no chip select */
359 udelay(30);
360 return val;
361 }
362
363 /**
364 * initio_se2_wr - read E2PROM word
365 * @base: Base of InitIO controller
366 * @addr: Address of word in E2PROM
367 * @val: Value to write
368 *
369 * Write a word to the NV E2PROM device. Used when recovering from
370 * a problem with the NV.
371 */
372 static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
373 {
374 u8 rb;
375 u8 instr;
376 int i;
377
378 instr = (u8) (addr | 0x40);
379 initio_se2_instr(base, instr); /* WRITE INSTR */
380 for (i = 15; i >= 0; i--) {
381 if (val & 0x8000)
382 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* -CLK+dataBit 1 */
383 else
384 outb(SE2CS, base + TUL_NVRAM); /* -CLK+dataBit 0 */
385 udelay(30);
386 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
387 udelay(30);
388 val <<= 1;
389 }
390 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
391 udelay(30);
392 outb(0, base + TUL_NVRAM); /* -CS */
393 udelay(30);
394
395 outb(SE2CS, base + TUL_NVRAM); /* +CS */
396 udelay(30);
397
398 for (;;) {
399 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
400 udelay(30);
401 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
402 udelay(30);
403 if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
404 break; /* write complete */
405 }
406 outb(0, base + TUL_NVRAM); /* -CS */
407 }
408
409 /**
410 * initio_se2_rd_all - read hostadapter NV configuration
411 * @base: Base address of InitIO controller
412 *
413 * Reads the E2PROM data into main memory. Ensures that the checksum
414 * and header marker are valid. Returns 1 on success -1 on error.
415 */
416
417 static int initio_se2_rd_all(unsigned long base)
418 {
419 int i;
420 u16 chksum = 0;
421 u16 *np;
422
423 i91unvramp = &i91unvram;
424 np = (u16 *) i91unvramp;
425 for (i = 0; i < 32; i++)
426 *np++ = initio_se2_rd(base, i);
427
428 /* Is signature "ini" ok ? */
429 if (i91unvramp->NVM_Signature != INI_SIGNATURE)
430 return -1;
431 /* Is ckecksum ok ? */
432 np = (u16 *) i91unvramp;
433 for (i = 0; i < 31; i++)
434 chksum += *np++;
435 if (i91unvramp->NVM_CheckSum != chksum)
436 return -1;
437 return 1;
438 }
439
440 /**
441 * initio_se2_update_all - Update E2PROM
442 * @base: Base of InitIO controller
443 *
444 * Update the E2PROM by wrting any changes into the E2PROM
445 * chip, rewriting the checksum.
446 */
447 static void initio_se2_update_all(unsigned long base)
448 { /* setup default pattern */
449 int i;
450 u16 chksum = 0;
451 u16 *np, *np1;
452
453 i91unvramp = &i91unvram;
454 /* Calculate checksum first */
455 np = (u16 *) i91udftNvRam;
456 for (i = 0; i < 31; i++)
457 chksum += *np++;
458 *np = chksum;
459 initio_se2_ew_en(base); /* Enable write */
460
461 np = (u16 *) i91udftNvRam;
462 np1 = (u16 *) i91unvramp;
463 for (i = 0; i < 32; i++, np++, np1++) {
464 if (*np != *np1)
465 initio_se2_wr(base, i, *np);
466 }
467 initio_se2_ew_ds(base); /* Disable write */
468 }
469
470 /**
471 * initio_read_eeprom - Retrieve configuration
472 * @base: Base of InitIO Host Adapter
473 *
474 * Retrieve the host adapter configuration data from E2Prom. If the
475 * data is invalid then the defaults are used and are also restored
476 * into the E2PROM. This forms the access point for the SCSI driver
477 * into the E2PROM layer, the other functions for the E2PROM are all
478 * internal use.
479 *
480 * Must be called single threaded, uses a shared global area.
481 */
482
483 static void initio_read_eeprom(unsigned long base)
484 {
485 u8 gctrl;
486
487 i91unvramp = &i91unvram;
488 /* Enable EEProm programming */
489 gctrl = inb(base + TUL_GCTRL);
490 outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
491 if (initio_se2_rd_all(base) != 1) {
492 initio_se2_update_all(base); /* setup default pattern */
493 initio_se2_rd_all(base); /* load again */
494 }
495 /* Disable EEProm programming */
496 gctrl = inb(base + TUL_GCTRL);
497 outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
498 }
499
500 /**
501 * initio_stop_bm - stop bus master
502 * @host: InitIO we are stopping
503 *
504 * Stop any pending DMA operation, aborting the DMA if necessary
505 */
506
507 static void initio_stop_bm(struct initio_host * host)
508 {
509
510 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
511 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
512 /* wait Abort DMA xfer done */
513 while ((inb(host->addr + TUL_Int) & XABT) == 0)
514 cpu_relax();
515 }
516 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
517 }
518
519 /**
520 * initio_reset_scsi - Reset SCSI host controller
521 * @host: InitIO host to reset
522 * @seconds: Recovery time
523 *
524 * Perform a full reset of the SCSI subsystem.
525 */
526
527 static int initio_reset_scsi(struct initio_host * host, int seconds)
528 {
529 outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
530
531 while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
532 cpu_relax();
533
534 /* reset tulip chip */
535 outb(0, host->addr + TUL_SSignal);
536
537 /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
538 /* SONY 5200 tape drive won't work if only stall for 1 sec */
539 /* FIXME: this is a very long busy wait right now */
540 initio_do_pause(seconds * HZ);
541
542 inb(host->addr + TUL_SInt);
543 return SCSI_RESET_SUCCESS;
544 }
545
546 /**
547 * initio_init - set up an InitIO host adapter
548 * @host: InitIO host adapter
549 * @num_scbs: Number of SCBS
550 * @bios_addr: BIOS address
551 *
552 * Set up the host adapter and devices according to the configuration
553 * retrieved from the E2PROM.
554 *
555 * Locking: Calls E2PROM layer code which is not re-enterable so must
556 * run single threaded for now.
557 */
558
559 static void initio_init(struct initio_host * host, u8 *bios_addr)
560 {
561 int i;
562 u8 *flags;
563 u8 *heads;
564
565 /* Get E2Prom configuration */
566 initio_read_eeprom(host->addr);
567 if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
568 host->max_tar = 8;
569 else
570 host->max_tar = 16;
571
572 host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
573
574 host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
575 host->idmask = ~(1 << host->scsi_id);
576
577 #ifdef CHK_PARITY
578 /* Enable parity error response */
579 outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
580 #endif
581
582 /* Mask all the interrupt */
583 outb(0x1F, host->addr + TUL_Mask);
584
585 initio_stop_bm(host);
586 /* --- Initialize the tulip --- */
587 outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
588
589 /* program HBA's SCSI ID */
590 outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
591
592 /* Enable Initiator Mode ,phase latch,alternate sync period mode,
593 disable SCSI reset */
594 if (host->config & HCC_EN_PAR)
595 host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
596 else
597 host->sconf1 = (TSC_INITDEFAULT);
598 outb(host->sconf1, host->addr + TUL_SConfig);
599
600 /* Enable HW reselect */
601 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
602
603 outb(0, host->addr + TUL_SPeriod);
604
605 /* selection time out = 250 ms */
606 outb(153, host->addr + TUL_STimeOut);
607
608 /* Enable SCSI terminator */
609 outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
610 host->addr + TUL_XCtrl);
611 outb(((host->config & HCC_AUTO_TERM) >> 4) |
612 (inb(host->addr + TUL_GCTRL1) & 0xFE),
613 host->addr + TUL_GCTRL1);
614
615 for (i = 0,
616 flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
617 heads = bios_addr + 0x180;
618 i < host->max_tar;
619 i++, flags++) {
620 host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
621 if (host->targets[i].flags & TCF_EN_255)
622 host->targets[i].drv_flags = TCF_DRV_255_63;
623 else
624 host->targets[i].drv_flags = 0;
625 host->targets[i].js_period = 0;
626 host->targets[i].sconfig0 = host->sconf1;
627 host->targets[i].heads = *heads++;
628 if (host->targets[i].heads == 255)
629 host->targets[i].drv_flags = TCF_DRV_255_63;
630 else
631 host->targets[i].drv_flags = 0;
632 host->targets[i].sectors = *heads++;
633 host->targets[i].flags &= ~TCF_BUSY;
634 host->act_tags[i] = 0;
635 host->max_tags[i] = 0xFF;
636 } /* for */
637 printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
638 host->addr, host->pci_dev->irq,
639 host->bios_addr, host->scsi_id);
640 /* Reset SCSI Bus */
641 if (host->config & HCC_SCSI_RESET) {
642 printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
643 initio_reset_scsi(host, 10);
644 }
645 outb(0x17, host->addr + TUL_SCFG1);
646 outb(0xE9, host->addr + TUL_SIntEnable);
647 }
648
649 /**
650 * initio_alloc_scb - Allocate an SCB
651 * @host: InitIO host we are allocating for
652 *
653 * Walk the SCB list for the controller and allocate a free SCB if
654 * one exists.
655 */
656 static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
657 {
658 struct scsi_ctrl_blk *scb;
659 unsigned long flags;
660
661 spin_lock_irqsave(&host->avail_lock, flags);
662 if ((scb = host->first_avail) != NULL) {
663 #if DEBUG_QUEUE
664 printk("find scb at %p\n", scb);
665 #endif
666 if ((host->first_avail = scb->next) == NULL)
667 host->last_avail = NULL;
668 scb->next = NULL;
669 scb->status = SCB_RENT;
670 }
671 spin_unlock_irqrestore(&host->avail_lock, flags);
672 return scb;
673 }
674
675 /**
676 * initio_release_scb - Release an SCB
677 * @host: InitIO host that owns the SCB
678 * @cmnd: SCB command block being returned
679 *
680 * Return an allocated SCB to the host free list
681 */
682
683 static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
684 {
685 unsigned long flags;
686
687 #if DEBUG_QUEUE
688 printk("Release SCB %p; ", cmnd);
689 #endif
690 spin_lock_irqsave(&(host->avail_lock), flags);
691 cmnd->srb = NULL;
692 cmnd->status = 0;
693 cmnd->next = NULL;
694 if (host->last_avail != NULL) {
695 host->last_avail->next = cmnd;
696 host->last_avail = cmnd;
697 } else {
698 host->first_avail = cmnd;
699 host->last_avail = cmnd;
700 }
701 spin_unlock_irqrestore(&(host->avail_lock), flags);
702 }
703
704 /***************************************************************************/
705 static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
706 {
707
708 #if DEBUG_QUEUE
709 printk("Append pend SCB %p; ", scbp);
710 #endif
711 scbp->status = SCB_PEND;
712 scbp->next = NULL;
713 if (host->last_pending != NULL) {
714 host->last_pending->next = scbp;
715 host->last_pending = scbp;
716 } else {
717 host->first_pending = scbp;
718 host->last_pending = scbp;
719 }
720 }
721
722 /***************************************************************************/
723 static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
724 {
725
726 #if DEBUG_QUEUE
727 printk("Push pend SCB %p; ", scbp);
728 #endif
729 scbp->status = SCB_PEND;
730 if ((scbp->next = host->first_pending) != NULL) {
731 host->first_pending = scbp;
732 } else {
733 host->first_pending = scbp;
734 host->last_pending = scbp;
735 }
736 }
737
738 static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
739 {
740 struct scsi_ctrl_blk *first;
741
742
743 first = host->first_pending;
744 while (first != NULL) {
745 if (first->opcode != ExecSCSI)
746 return first;
747 if (first->tagmsg == 0) {
748 if ((host->act_tags[first->target] == 0) &&
749 !(host->targets[first->target].flags & TCF_BUSY))
750 return first;
751 } else {
752 if ((host->act_tags[first->target] >=
753 host->max_tags[first->target]) |
754 (host->targets[first->target].flags & TCF_BUSY)) {
755 first = first->next;
756 continue;
757 }
758 return first;
759 }
760 first = first->next;
761 }
762 return first;
763 }
764
765 static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
766 {
767 struct scsi_ctrl_blk *tmp, *prev;
768
769 #if DEBUG_QUEUE
770 printk("unlink pend SCB %p; ", scb);
771 #endif
772
773 prev = tmp = host->first_pending;
774 while (tmp != NULL) {
775 if (scb == tmp) { /* Unlink this SCB */
776 if (tmp == host->first_pending) {
777 if ((host->first_pending = tmp->next) == NULL)
778 host->last_pending = NULL;
779 } else {
780 prev->next = tmp->next;
781 if (tmp == host->last_pending)
782 host->last_pending = prev;
783 }
784 tmp->next = NULL;
785 break;
786 }
787 prev = tmp;
788 tmp = tmp->next;
789 }
790 }
791
792 static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
793 {
794
795 #if DEBUG_QUEUE
796 printk("append busy SCB %p; ", scbp);
797 #endif
798 if (scbp->tagmsg)
799 host->act_tags[scbp->target]++;
800 else
801 host->targets[scbp->target].flags |= TCF_BUSY;
802 scbp->status = SCB_BUSY;
803 scbp->next = NULL;
804 if (host->last_busy != NULL) {
805 host->last_busy->next = scbp;
806 host->last_busy = scbp;
807 } else {
808 host->first_busy = scbp;
809 host->last_busy = scbp;
810 }
811 }
812
813 /***************************************************************************/
814 static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
815 {
816 struct scsi_ctrl_blk *tmp;
817
818
819 if ((tmp = host->first_busy) != NULL) {
820 if ((host->first_busy = tmp->next) == NULL)
821 host->last_busy = NULL;
822 tmp->next = NULL;
823 if (tmp->tagmsg)
824 host->act_tags[tmp->target]--;
825 else
826 host->targets[tmp->target].flags &= ~TCF_BUSY;
827 }
828 #if DEBUG_QUEUE
829 printk("Pop busy SCB %p; ", tmp);
830 #endif
831 return tmp;
832 }
833
834 /***************************************************************************/
835 static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
836 {
837 struct scsi_ctrl_blk *tmp, *prev;
838
839 #if DEBUG_QUEUE
840 printk("unlink busy SCB %p; ", scb);
841 #endif
842
843 prev = tmp = host->first_busy;
844 while (tmp != NULL) {
845 if (scb == tmp) { /* Unlink this SCB */
846 if (tmp == host->first_busy) {
847 if ((host->first_busy = tmp->next) == NULL)
848 host->last_busy = NULL;
849 } else {
850 prev->next = tmp->next;
851 if (tmp == host->last_busy)
852 host->last_busy = prev;
853 }
854 tmp->next = NULL;
855 if (tmp->tagmsg)
856 host->act_tags[tmp->target]--;
857 else
858 host->targets[tmp->target].flags &= ~TCF_BUSY;
859 break;
860 }
861 prev = tmp;
862 tmp = tmp->next;
863 }
864 return;
865 }
866
867 struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
868 {
869 struct scsi_ctrl_blk *tmp, *prev;
870 u16 scbp_tarlun;
871
872
873 prev = tmp = host->first_busy;
874 while (tmp != NULL) {
875 scbp_tarlun = (tmp->lun << 8) | (tmp->target);
876 if (scbp_tarlun == tarlun) { /* Unlink this SCB */
877 break;
878 }
879 prev = tmp;
880 tmp = tmp->next;
881 }
882 #if DEBUG_QUEUE
883 printk("find busy SCB %p; ", tmp);
884 #endif
885 return tmp;
886 }
887
888 static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
889 {
890 #if DEBUG_QUEUE
891 printk("append done SCB %p; ", scbp);
892 #endif
893
894 scbp->status = SCB_DONE;
895 scbp->next = NULL;
896 if (host->last_done != NULL) {
897 host->last_done->next = scbp;
898 host->last_done = scbp;
899 } else {
900 host->first_done = scbp;
901 host->last_done = scbp;
902 }
903 }
904
905 struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
906 {
907 struct scsi_ctrl_blk *tmp;
908
909 if ((tmp = host->first_done) != NULL) {
910 if ((host->first_done = tmp->next) == NULL)
911 host->last_done = NULL;
912 tmp->next = NULL;
913 }
914 #if DEBUG_QUEUE
915 printk("find done SCB %p; ",tmp);
916 #endif
917 return tmp;
918 }
919
920 static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
921 {
922 unsigned long flags;
923 struct scsi_ctrl_blk *tmp, *prev;
924
925 spin_lock_irqsave(&host->semaph_lock, flags);
926
927 if ((host->semaph == 0) && (host->active == NULL)) {
928 /* disable Jasmin SCSI Int */
929 outb(0x1F, host->addr + TUL_Mask);
930 spin_unlock_irqrestore(&host->semaph_lock, flags);
931 /* FIXME: synchronize_irq needed ? */
932 tulip_main(host);
933 spin_lock_irqsave(&host->semaph_lock, flags);
934 host->semaph = 1;
935 outb(0x0F, host->addr + TUL_Mask);
936 spin_unlock_irqrestore(&host->semaph_lock, flags);
937 return SCSI_ABORT_SNOOZE;
938 }
939 prev = tmp = host->first_pending; /* Check Pend queue */
940 while (tmp != NULL) {
941 /* 07/27/98 */
942 if (tmp->srb == srbp) {
943 if (tmp == host->active) {
944 spin_unlock_irqrestore(&host->semaph_lock, flags);
945 return SCSI_ABORT_BUSY;
946 } else if (tmp == host->first_pending) {
947 if ((host->first_pending = tmp->next) == NULL)
948 host->last_pending = NULL;
949 } else {
950 prev->next = tmp->next;
951 if (tmp == host->last_pending)
952 host->last_pending = prev;
953 }
954 tmp->hastat = HOST_ABORTED;
955 tmp->flags |= SCF_DONE;
956 if (tmp->flags & SCF_POST)
957 (*tmp->post) ((u8 *) host, (u8 *) tmp);
958 spin_unlock_irqrestore(&host->semaph_lock, flags);
959 return SCSI_ABORT_SUCCESS;
960 }
961 prev = tmp;
962 tmp = tmp->next;
963 }
964
965 prev = tmp = host->first_busy; /* Check Busy queue */
966 while (tmp != NULL) {
967 if (tmp->srb == srbp) {
968 if (tmp == host->active) {
969 spin_unlock_irqrestore(&host->semaph_lock, flags);
970 return SCSI_ABORT_BUSY;
971 } else if (tmp->tagmsg == 0) {
972 spin_unlock_irqrestore(&host->semaph_lock, flags);
973 return SCSI_ABORT_BUSY;
974 } else {
975 host->act_tags[tmp->target]--;
976 if (tmp == host->first_busy) {
977 if ((host->first_busy = tmp->next) == NULL)
978 host->last_busy = NULL;
979 } else {
980 prev->next = tmp->next;
981 if (tmp == host->last_busy)
982 host->last_busy = prev;
983 }
984 tmp->next = NULL;
985
986
987 tmp->hastat = HOST_ABORTED;
988 tmp->flags |= SCF_DONE;
989 if (tmp->flags & SCF_POST)
990 (*tmp->post) ((u8 *) host, (u8 *) tmp);
991 spin_unlock_irqrestore(&host->semaph_lock, flags);
992 return SCSI_ABORT_SUCCESS;
993 }
994 }
995 prev = tmp;
996 tmp = tmp->next;
997 }
998 spin_unlock_irqrestore(&host->semaph_lock, flags);
999 return SCSI_ABORT_NOT_RUNNING;
1000 }
1001
1002 /***************************************************************************/
1003 static int initio_bad_seq(struct initio_host * host)
1004 {
1005 struct scsi_ctrl_blk *scb;
1006
1007 printk("initio_bad_seg c=%d\n", host->index);
1008
1009 if ((scb = host->active) != NULL) {
1010 initio_unlink_busy_scb(host, scb);
1011 scb->hastat = HOST_BAD_PHAS;
1012 scb->tastat = 0;
1013 initio_append_done_scb(host, scb);
1014 }
1015 initio_stop_bm(host);
1016 initio_reset_scsi(host, 8); /* 7/29/98 */
1017 return initio_post_scsi_rst(host);
1018 }
1019
1020
1021 /************************************************************************/
1022 static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1023 {
1024 unsigned long flags;
1025
1026 scb->mode = 0;
1027
1028 scb->sgidx = 0;
1029 scb->sgmax = scb->sglen;
1030
1031 spin_lock_irqsave(&host->semaph_lock, flags);
1032
1033 initio_append_pend_scb(host, scb); /* Append this SCB to Pending queue */
1034
1035 /* VVVVV 07/21/98 */
1036 if (host->semaph == 1) {
1037 /* Disable Jasmin SCSI Int */
1038 outb(0x1F, host->addr + TUL_Mask);
1039 host->semaph = 0;
1040 spin_unlock_irqrestore(&host->semaph_lock, flags);
1041
1042 tulip_main(host);
1043
1044 spin_lock_irqsave(&host->semaph_lock, flags);
1045 host->semaph = 1;
1046 outb(0x0F, host->addr + TUL_Mask);
1047 }
1048 spin_unlock_irqrestore(&host->semaph_lock, flags);
1049 return;
1050 }
1051
1052 /***************************************************************************/
1053 static int initio_isr(struct initio_host * host)
1054 {
1055 if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1056 if (host->semaph == 1) {
1057 outb(0x1F, host->addr + TUL_Mask);
1058 /* Disable Tulip SCSI Int */
1059 host->semaph = 0;
1060
1061 tulip_main(host);
1062
1063 host->semaph = 1;
1064 outb(0x0F, host->addr + TUL_Mask);
1065 return 1;
1066 }
1067 }
1068 return 0;
1069 }
1070
1071 static int tulip_main(struct initio_host * host)
1072 {
1073 struct scsi_ctrl_blk *scb;
1074
1075 for (;;) {
1076 tulip_scsi(host); /* Call tulip_scsi */
1077
1078 /* Walk the list of completed SCBs */
1079 while ((scb = initio_find_done_scb(host)) != NULL) { /* find done entry */
1080 if (scb->tastat == INI_QUEUE_FULL) {
1081 host->max_tags[scb->target] =
1082 host->act_tags[scb->target] - 1;
1083 scb->tastat = 0;
1084 initio_append_pend_scb(host, scb);
1085 continue;
1086 }
1087 if (!(scb->mode & SCM_RSENS)) { /* not in auto req. sense mode */
1088 if (scb->tastat == 2) {
1089
1090 /* clr sync. nego flag */
1091
1092 if (scb->flags & SCF_SENSE) {
1093 u8 len;
1094 len = scb->senselen;
1095 if (len == 0)
1096 len = 1;
1097 scb->buflen = scb->senselen;
1098 scb->bufptr = scb->senseptr;
1099 scb->flags &= ~(SCF_SG | SCF_DIR); /* for xfer_data_in */
1100 /* so, we won't report wrong direction in xfer_data_in,
1101 and won't report HOST_DO_DU in state_6 */
1102 scb->mode = SCM_RSENS;
1103 scb->ident &= 0xBF; /* Disable Disconnect */
1104 scb->tagmsg = 0;
1105 scb->tastat = 0;
1106 scb->cdblen = 6;
1107 scb->cdb[0] = SCSICMD_RequestSense;
1108 scb->cdb[1] = 0;
1109 scb->cdb[2] = 0;
1110 scb->cdb[3] = 0;
1111 scb->cdb[4] = len;
1112 scb->cdb[5] = 0;
1113 initio_push_pend_scb(host, scb);
1114 break;
1115 }
1116 }
1117 } else { /* in request sense mode */
1118
1119 if (scb->tastat == 2) { /* check contition status again after sending
1120 requset sense cmd 0x3 */
1121 scb->hastat = HOST_BAD_PHAS;
1122 }
1123 scb->tastat = 2;
1124 }
1125 scb->flags |= SCF_DONE;
1126 if (scb->flags & SCF_POST) {
1127 /* FIXME: only one post method and lose casts */
1128 (*scb->post) ((u8 *) host, (u8 *) scb);
1129 }
1130 } /* while */
1131 /* find_active: */
1132 if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1133 continue;
1134 if (host->active) /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1135 return 1; /* return to OS, enable interrupt */
1136 /* Check pending SCB */
1137 if (initio_find_first_pend_scb(host) == NULL)
1138 return 1; /* return to OS, enable interrupt */
1139 } /* End of for loop */
1140 /* statement won't reach here */
1141 }
1142
1143 static void tulip_scsi(struct initio_host * host)
1144 {
1145 struct scsi_ctrl_blk *scb;
1146 struct target_control *active_tc;
1147
1148 /* make sure to service interrupt asap */
1149 if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1150 host->phase = host->jsstatus0 & TSS_PH_MASK;
1151 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1152 host->jsint = inb(host->addr + TUL_SInt);
1153 if (host->jsint & TSS_SCSIRST_INT) { /* SCSI bus reset detected */
1154 int_initio_scsi_rst(host);
1155 return;
1156 }
1157 if (host->jsint & TSS_RESEL_INT) { /* if selected/reselected interrupt */
1158 if (int_initio_resel(host) == 0)
1159 initio_next_state(host);
1160 return;
1161 }
1162 if (host->jsint & TSS_SEL_TIMEOUT) {
1163 int_initio_busfree(host);
1164 return;
1165 }
1166 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
1167 int_initio_busfree(host); /* unexpected bus free or sel timeout */
1168 return;
1169 }
1170 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) { /* func complete or Bus service */
1171 if ((scb = host->active) != NULL)
1172 initio_next_state(host);
1173 return;
1174 }
1175 }
1176 if (host->active != NULL)
1177 return;
1178
1179 if ((scb = initio_find_first_pend_scb(host)) == NULL)
1180 return;
1181
1182 /* program HBA's SCSI ID & target SCSI ID */
1183 outb((host->scsi_id << 4) | (scb->target & 0x0F),
1184 host->addr + TUL_SScsiId);
1185 if (scb->opcode == ExecSCSI) {
1186 active_tc = &host->targets[scb->target];
1187
1188 if (scb->tagmsg)
1189 active_tc->drv_flags |= TCF_DRV_EN_TAG;
1190 else
1191 active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1192
1193 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1194 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) { /* do wdtr negotiation */
1195 initio_select_atn_stop(host, scb);
1196 } else {
1197 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { /* do sync negotiation */
1198 initio_select_atn_stop(host, scb);
1199 } else {
1200 if (scb->tagmsg)
1201 initio_select_atn3(host, scb);
1202 else
1203 initio_select_atn(host, scb);
1204 }
1205 }
1206 if (scb->flags & SCF_POLL) {
1207 while (wait_tulip(host) != -1) {
1208 if (initio_next_state(host) == -1)
1209 break;
1210 }
1211 }
1212 } else if (scb->opcode == BusDevRst) {
1213 initio_select_atn_stop(host, scb);
1214 scb->next_state = 8;
1215 if (scb->flags & SCF_POLL) {
1216 while (wait_tulip(host) != -1) {
1217 if (initio_next_state(host) == -1)
1218 break;
1219 }
1220 }
1221 } else if (scb->opcode == AbortCmd) {
1222 if (initio_abort_srb(host, scb->srb) != 0) {
1223 initio_unlink_pend_scb(host, scb);
1224 initio_release_scb(host, scb);
1225 } else {
1226 scb->opcode = BusDevRst;
1227 initio_select_atn_stop(host, scb);
1228 scb->next_state = 8;
1229 }
1230 } else {
1231 initio_unlink_pend_scb(host, scb);
1232 scb->hastat = 0x16; /* bad command */
1233 initio_append_done_scb(host, scb);
1234 }
1235 return;
1236 }
1237
1238 /**
1239 * initio_next_state - Next SCSI state
1240 * @host: InitIO host we are processing
1241 *
1242 * Progress the active command block along the state machine
1243 * until we hit a state which we must wait for activity to occur.
1244 *
1245 * Returns zero or a negative code.
1246 */
1247
1248 static int initio_next_state(struct initio_host * host)
1249 {
1250 int next;
1251
1252 next = host->active->next_state;
1253 for (;;) {
1254 switch (next) {
1255 case 1:
1256 next = initio_state_1(host);
1257 break;
1258 case 2:
1259 next = initio_state_2(host);
1260 break;
1261 case 3:
1262 next = initio_state_3(host);
1263 break;
1264 case 4:
1265 next = initio_state_4(host);
1266 break;
1267 case 5:
1268 next = initio_state_5(host);
1269 break;
1270 case 6:
1271 next = initio_state_6(host);
1272 break;
1273 case 7:
1274 next = initio_state_7(host);
1275 break;
1276 case 8:
1277 return initio_bus_device_reset(host);
1278 default:
1279 return initio_bad_seq(host);
1280 }
1281 if (next <= 0)
1282 return next;
1283 }
1284 }
1285
1286
1287 /**
1288 * initio_state_1 - SCSI state machine
1289 * @host: InitIO host we are controlling
1290 *
1291 * Perform SCSI state processing for Select/Attention/Stop
1292 */
1293
1294 static int initio_state_1(struct initio_host * host)
1295 {
1296 struct scsi_ctrl_blk *scb = host->active;
1297 struct target_control *active_tc = host->active_tc;
1298 #if DEBUG_STATE
1299 printk("-s1-");
1300 #endif
1301
1302 /* Move the SCB from pending to busy */
1303 initio_unlink_pend_scb(host, scb);
1304 initio_append_busy_scb(host, scb);
1305
1306 outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1307 /* ATN on */
1308 if (host->phase == MSG_OUT) {
1309 outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1310 outb(scb->ident, host->addr + TUL_SFifo);
1311
1312 if (scb->tagmsg) {
1313 outb(scb->tagmsg, host->addr + TUL_SFifo);
1314 outb(scb->tagid, host->addr + TUL_SFifo);
1315 }
1316 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1317 active_tc->flags |= TCF_WDTR_DONE;
1318 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1319 outb(2, host->addr + TUL_SFifo); /* Extended msg length */
1320 outb(3, host->addr + TUL_SFifo); /* Sync request */
1321 outb(1, host->addr + TUL_SFifo); /* Start from 16 bits */
1322 } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1323 active_tc->flags |= TCF_SYNC_DONE;
1324 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1325 outb(3, host->addr + TUL_SFifo); /* extended msg length */
1326 outb(1, host->addr + TUL_SFifo); /* sync request */
1327 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1328 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1329 }
1330 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1331 if (wait_tulip(host) == -1)
1332 return -1;
1333 }
1334 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1335 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1336 /* Into before CDB xfer */
1337 return 3;
1338 }
1339
1340
1341 /**
1342 * initio_state_2 - SCSI state machine
1343 * @host: InitIO host we are controlling
1344 *
1345 * state after selection with attention
1346 * state after selection with attention3
1347 */
1348
1349 static int initio_state_2(struct initio_host * host)
1350 {
1351 struct scsi_ctrl_blk *scb = host->active;
1352 struct target_control *active_tc = host->active_tc;
1353 #if DEBUG_STATE
1354 printk("-s2-");
1355 #endif
1356
1357 initio_unlink_pend_scb(host, scb);
1358 initio_append_busy_scb(host, scb);
1359
1360 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1361
1362 if (host->jsstatus1 & TSS_CMD_PH_CMP)
1363 return 4;
1364
1365 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1366 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1367 /* Into before CDB xfer */
1368 return 3;
1369 }
1370
1371 /**
1372 * initio_state_3 - SCSI state machine
1373 * @host: InitIO host we are controlling
1374 *
1375 * state before CDB xfer is done
1376 */
1377
1378 static int initio_state_3(struct initio_host * host)
1379 {
1380 struct scsi_ctrl_blk *scb = host->active;
1381 struct target_control *active_tc = host->active_tc;
1382 int i;
1383
1384 #if DEBUG_STATE
1385 printk("-s3-");
1386 #endif
1387 for (;;) {
1388 switch (host->phase) {
1389 case CMD_OUT: /* Command out phase */
1390 for (i = 0; i < (int) scb->cdblen; i++)
1391 outb(scb->cdb[i], host->addr + TUL_SFifo);
1392 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1393 if (wait_tulip(host) == -1)
1394 return -1;
1395 if (host->phase == CMD_OUT)
1396 return initio_bad_seq(host);
1397 return 4;
1398
1399 case MSG_IN: /* Message in phase */
1400 scb->next_state = 3;
1401 if (initio_msgin(host) == -1)
1402 return -1;
1403 break;
1404
1405 case STATUS_IN: /* Status phase */
1406 if (initio_status_msg(host) == -1)
1407 return -1;
1408 break;
1409
1410 case MSG_OUT: /* Message out phase */
1411 if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1412 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1413 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1414 if (wait_tulip(host) == -1)
1415 return -1;
1416 } else {
1417 active_tc->flags |= TCF_SYNC_DONE;
1418
1419 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1420 outb(3, host->addr + TUL_SFifo); /* ext. msg len */
1421 outb(1, host->addr + TUL_SFifo); /* sync request */
1422 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1423 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1424 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1425 if (wait_tulip(host) == -1)
1426 return -1;
1427 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1428 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1429
1430 }
1431 break;
1432 default:
1433 return initio_bad_seq(host);
1434 }
1435 }
1436 }
1437
1438 /**
1439 * initio_state_4 - SCSI state machine
1440 * @host: InitIO host we are controlling
1441 *
1442 * SCSI state machine. State 4
1443 */
1444
1445 static int initio_state_4(struct initio_host * host)
1446 {
1447 struct scsi_ctrl_blk *scb = host->active;
1448
1449 #if DEBUG_STATE
1450 printk("-s4-");
1451 #endif
1452 if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1453 return 6; /* Go to state 6 (After data) */
1454 }
1455 for (;;) {
1456 if (scb->buflen == 0)
1457 return 6;
1458
1459 switch (host->phase) {
1460
1461 case STATUS_IN: /* Status phase */
1462 if ((scb->flags & SCF_DIR) != 0) /* if direction bit set then report data underrun */
1463 scb->hastat = HOST_DO_DU;
1464 if ((initio_status_msg(host)) == -1)
1465 return -1;
1466 break;
1467
1468 case MSG_IN: /* Message in phase */
1469 scb->next_state = 0x4;
1470 if (initio_msgin(host) == -1)
1471 return -1;
1472 break;
1473
1474 case MSG_OUT: /* Message out phase */
1475 if (host->jsstatus0 & TSS_PAR_ERROR) {
1476 scb->buflen = 0;
1477 scb->hastat = HOST_DO_DU;
1478 if (initio_msgout_ide(host) == -1)
1479 return -1;
1480 return 6;
1481 } else {
1482 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1483 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1484 if (wait_tulip(host) == -1)
1485 return -1;
1486 }
1487 break;
1488
1489 case DATA_IN: /* Data in phase */
1490 return initio_xfer_data_in(host);
1491
1492 case DATA_OUT: /* Data out phase */
1493 return initio_xfer_data_out(host);
1494
1495 default:
1496 return initio_bad_seq(host);
1497 }
1498 }
1499 }
1500
1501
1502 /**
1503 * initio_state_5 - SCSI state machine
1504 * @host: InitIO host we are controlling
1505 *
1506 * State after dma xfer done or phase change before xfer done
1507 */
1508
1509 static int initio_state_5(struct initio_host * host)
1510 {
1511 struct scsi_ctrl_blk *scb = host->active;
1512 long cnt, xcnt; /* cannot use unsigned !! code: if (xcnt < 0) */
1513
1514 #if DEBUG_STATE
1515 printk("-s5-");
1516 #endif
1517 /*------ get remaining count -------*/
1518 cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1519
1520 if (inb(host->addr + TUL_XCmd) & 0x20) {
1521 /* ----------------------- DATA_IN ----------------------------- */
1522 /* check scsi parity error */
1523 if (host->jsstatus0 & TSS_PAR_ERROR)
1524 scb->hastat = HOST_DO_DU;
1525 if (inb(host->addr + TUL_XStatus) & XPEND) { /* DMA xfer pending, Send STOP */
1526 /* tell Hardware scsi xfer has been terminated */
1527 outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1528 /* wait until DMA xfer not pending */
1529 while (inb(host->addr + TUL_XStatus) & XPEND)
1530 cpu_relax();
1531 }
1532 } else {
1533 /*-------- DATA OUT -----------*/
1534 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1535 if (host->active_tc->js_period & TSC_WIDE_SCSI)
1536 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1537 else
1538 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1539 }
1540 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
1541 outb(TAX_X_ABT, host->addr + TUL_XCmd);
1542 /* wait Abort DMA xfer done */
1543 while ((inb(host->addr + TUL_Int) & XABT) == 0)
1544 cpu_relax();
1545 }
1546 if ((cnt == 1) && (host->phase == DATA_OUT)) {
1547 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1548 if (wait_tulip(host) == -1)
1549 return -1;
1550 cnt = 0;
1551 } else {
1552 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1553 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1554 }
1555 }
1556 if (cnt == 0) {
1557 scb->buflen = 0;
1558 return 6; /* After Data */
1559 }
1560 /* Update active data pointer */
1561 xcnt = (long) scb->buflen - cnt; /* xcnt== bytes already xferred */
1562 scb->buflen = (u32) cnt; /* cnt == bytes left to be xferred */
1563 if (scb->flags & SCF_SG) {
1564 struct sg_entry *sgp;
1565 unsigned long i;
1566
1567 sgp = &scb->sglist[scb->sgidx];
1568 for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1569 xcnt -= (long) sgp->len;
1570 if (xcnt < 0) { /* this sgp xfer half done */
1571 xcnt += (long) sgp->len; /* xcnt == bytes xferred in this sgp */
1572 sgp->data += (u32) xcnt; /* new ptr to be xfer */
1573 sgp->len -= (u32) xcnt; /* new len to be xfer */
1574 scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1575 /* new SG table ptr */
1576 scb->sglen = (u8) (scb->sgmax - i);
1577 /* new SG table len */
1578 scb->sgidx = (u16) i;
1579 /* for next disc and come in this loop */
1580 return 4; /* Go to state 4 */
1581 }
1582 /* else (xcnt >= 0 , i.e. this sgp already xferred */
1583 } /* for */
1584 return 6; /* Go to state 6 */
1585 } else {
1586 scb->bufptr += (u32) xcnt;
1587 }
1588 return 4; /* Go to state 4 */
1589 }
1590
1591 /**
1592 * initio_state_6 - SCSI state machine
1593 * @host: InitIO host we are controlling
1594 *
1595 * State after Data phase
1596 */
1597
1598 static int initio_state_6(struct initio_host * host)
1599 {
1600 struct scsi_ctrl_blk *scb = host->active;
1601
1602 #if DEBUG_STATE
1603 printk("-s6-");
1604 #endif
1605 for (;;) {
1606 switch (host->phase) {
1607 case STATUS_IN: /* Status phase */
1608 if ((initio_status_msg(host)) == -1)
1609 return -1;
1610 break;
1611
1612 case MSG_IN: /* Message in phase */
1613 scb->next_state = 6;
1614 if ((initio_msgin(host)) == -1)
1615 return -1;
1616 break;
1617
1618 case MSG_OUT: /* Message out phase */
1619 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1620 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1621 if (wait_tulip(host) == -1)
1622 return -1;
1623 break;
1624
1625 case DATA_IN: /* Data in phase */
1626 return initio_xpad_in(host);
1627
1628 case DATA_OUT: /* Data out phase */
1629 return initio_xpad_out(host);
1630
1631 default:
1632 return initio_bad_seq(host);
1633 }
1634 }
1635 }
1636
1637 /**
1638 * initio_state_7 - SCSI state machine
1639 * @host: InitIO host we are controlling
1640 *
1641 */
1642
1643 static int initio_state_7(struct initio_host * host)
1644 {
1645 int cnt, i;
1646
1647 #if DEBUG_STATE
1648 printk("-s7-");
1649 #endif
1650 /* flush SCSI FIFO */
1651 cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1652 if (cnt) {
1653 for (i = 0; i < cnt; i++)
1654 inb(host->addr + TUL_SFifo);
1655 }
1656 switch (host->phase) {
1657 case DATA_IN: /* Data in phase */
1658 case DATA_OUT: /* Data out phase */
1659 return initio_bad_seq(host);
1660 default:
1661 return 6; /* Go to state 6 */
1662 }
1663 }
1664
1665 /**
1666 * initio_xfer_data_in - Commence data input
1667 * @host: InitIO host in use
1668 *
1669 * Commence a block of data transfer. The transfer itself will
1670 * be managed by the controller and we will get a completion (or
1671 * failure) interrupt.
1672 */
1673 static int initio_xfer_data_in(struct initio_host * host)
1674 {
1675 struct scsi_ctrl_blk *scb = host->active;
1676
1677 if ((scb->flags & SCF_DIR) == SCF_DOUT)
1678 return 6; /* wrong direction */
1679
1680 outl(scb->buflen, host->addr + TUL_SCnt0);
1681 outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd); /* 7/25/95 */
1682
1683 if (scb->flags & SCF_SG) { /* S/G xfer */
1684 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1685 outl(scb->bufptr, host->addr + TUL_XAddH);
1686 outb(TAX_SG_IN, host->addr + TUL_XCmd);
1687 } else {
1688 outl(scb->buflen, host->addr + TUL_XCntH);
1689 outl(scb->bufptr, host->addr + TUL_XAddH);
1690 outb(TAX_X_IN, host->addr + TUL_XCmd);
1691 }
1692 scb->next_state = 0x5;
1693 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1694 }
1695
1696 /**
1697 * initio_xfer_data_out - Commence data output
1698 * @host: InitIO host in use
1699 *
1700 * Commence a block of data transfer. The transfer itself will
1701 * be managed by the controller and we will get a completion (or
1702 * failure) interrupt.
1703 */
1704
1705 static int initio_xfer_data_out(struct initio_host * host)
1706 {
1707 struct scsi_ctrl_blk *scb = host->active;
1708
1709 if ((scb->flags & SCF_DIR) == SCF_DIN)
1710 return 6; /* wrong direction */
1711
1712 outl(scb->buflen, host->addr + TUL_SCnt0);
1713 outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1714
1715 if (scb->flags & SCF_SG) { /* S/G xfer */
1716 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1717 outl(scb->bufptr, host->addr + TUL_XAddH);
1718 outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1719 } else {
1720 outl(scb->buflen, host->addr + TUL_XCntH);
1721 outl(scb->bufptr, host->addr + TUL_XAddH);
1722 outb(TAX_X_OUT, host->addr + TUL_XCmd);
1723 }
1724
1725 scb->next_state = 0x5;
1726 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1727 }
1728
1729 int initio_xpad_in(struct initio_host * host)
1730 {
1731 struct scsi_ctrl_blk *scb = host->active;
1732 struct target_control *active_tc = host->active_tc;
1733
1734 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1735 scb->hastat = HOST_DO_DU; /* over run */
1736 for (;;) {
1737 if (active_tc->js_period & TSC_WIDE_SCSI)
1738 outl(2, host->addr + TUL_SCnt0);
1739 else
1740 outl(1, host->addr + TUL_SCnt0);
1741
1742 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1743 if (wait_tulip(host) == -1)
1744 return -1;
1745 if (host->phase != DATA_IN) {
1746 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1747 return 6;
1748 }
1749 inb(host->addr + TUL_SFifo);
1750 }
1751 }
1752
1753 int initio_xpad_out(struct initio_host * host)
1754 {
1755 struct scsi_ctrl_blk *scb = host->active;
1756 struct target_control *active_tc = host->active_tc;
1757
1758 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1759 scb->hastat = HOST_DO_DU; /* over run */
1760 for (;;) {
1761 if (active_tc->js_period & TSC_WIDE_SCSI)
1762 outl(2, host->addr + TUL_SCnt0);
1763 else
1764 outl(1, host->addr + TUL_SCnt0);
1765
1766 outb(0, host->addr + TUL_SFifo);
1767 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1768 if ((wait_tulip(host)) == -1)
1769 return -1;
1770 if (host->phase != DATA_OUT) { /* Disable wide CPU to allow read 16 bits */
1771 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1772 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1773 return 6;
1774 }
1775 }
1776 }
1777
1778 int initio_status_msg(struct initio_host * host)
1779 { /* status & MSG_IN */
1780 struct scsi_ctrl_blk *scb = host->active;
1781 u8 msg;
1782
1783 outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1784 if (wait_tulip(host) == -1)
1785 return -1;
1786
1787 /* get status */
1788 scb->tastat = inb(host->addr + TUL_SFifo);
1789
1790 if (host->phase == MSG_OUT) {
1791 if (host->jsstatus0 & TSS_PAR_ERROR)
1792 outb(MSG_PARITY, host->addr + TUL_SFifo);
1793 else
1794 outb(MSG_NOP, host->addr + TUL_SFifo);
1795 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1796 return wait_tulip(host);
1797 }
1798 if (host->phase == MSG_IN) {
1799 msg = inb(host->addr + TUL_SFifo);
1800 if (host->jsstatus0 & TSS_PAR_ERROR) { /* Parity error */
1801 if ((initio_msgin_accept(host)) == -1)
1802 return -1;
1803 if (host->phase != MSG_OUT)
1804 return initio_bad_seq(host);
1805 outb(MSG_PARITY, host->addr + TUL_SFifo);
1806 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1807 return wait_tulip(host);
1808 }
1809 if (msg == 0) { /* Command complete */
1810
1811 if ((scb->tastat & 0x18) == 0x10) /* No link support */
1812 return initio_bad_seq(host);
1813 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1814 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1815 return initio_wait_done_disc(host);
1816
1817 }
1818 if (msg == MSG_LINK_COMP || msg == MSG_LINK_FLAG) {
1819 if ((scb->tastat & 0x18) == 0x10)
1820 return initio_msgin_accept(host);
1821 }
1822 }
1823 return initio_bad_seq(host);
1824 }
1825
1826
1827 /* scsi bus free */
1828 int int_initio_busfree(struct initio_host * host)
1829 {
1830 struct scsi_ctrl_blk *scb = host->active;
1831
1832 if (scb != NULL) {
1833 if (scb->status & SCB_SELECT) { /* selection timeout */
1834 initio_unlink_pend_scb(host, scb);
1835 scb->hastat = HOST_SEL_TOUT;
1836 initio_append_done_scb(host, scb);
1837 } else { /* Unexpected bus free */
1838 initio_unlink_busy_scb(host, scb);
1839 scb->hastat = HOST_BUS_FREE;
1840 initio_append_done_scb(host, scb);
1841 }
1842 host->active = NULL;
1843 host->active_tc = NULL;
1844 }
1845 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
1846 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1847 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
1848 return -1;
1849 }
1850
1851
1852 /**
1853 * int_initio_scsi_rst - SCSI reset occurred
1854 * @host: Host seeing the reset
1855 *
1856 * A SCSI bus reset has occurred. Clean up any pending transfer
1857 * the hardware is doing by DMA and then abort all active and
1858 * disconnected commands. The mid layer should sort the rest out
1859 * for us
1860 */
1861
1862 static int int_initio_scsi_rst(struct initio_host * host)
1863 {
1864 struct scsi_ctrl_blk *scb;
1865 int i;
1866
1867 /* if DMA xfer is pending, abort DMA xfer */
1868 if (inb(host->addr + TUL_XStatus) & 0x01) {
1869 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1870 /* wait Abort DMA xfer done */
1871 while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1872 cpu_relax();
1873 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1874 }
1875 /* Abort all active & disconnected scb */
1876 while ((scb = initio_pop_busy_scb(host)) != NULL) {
1877 scb->hastat = HOST_BAD_PHAS;
1878 initio_append_done_scb(host, scb);
1879 }
1880 host->active = NULL;
1881 host->active_tc = NULL;
1882
1883 /* clr sync nego. done flag */
1884 for (i = 0; i < host->max_tar; i++)
1885 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1886 return -1;
1887 }
1888
1889 /**
1890 * int_initio_scsi_resel - Reselection occurred
1891 * @host: InitIO host adapter
1892 *
1893 * A SCSI reselection event has been signalled and the interrupt
1894 * is now being processed. Work out which command block needs attention
1895 * and continue processing that command.
1896 */
1897
1898 int int_initio_resel(struct initio_host * host)
1899 {
1900 struct scsi_ctrl_blk *scb;
1901 struct target_control *active_tc;
1902 u8 tag, msg = 0;
1903 u8 tar, lun;
1904
1905 if ((scb = host->active) != NULL) {
1906 /* FIXME: Why check and not just clear ? */
1907 if (scb->status & SCB_SELECT) /* if waiting for selection complete */
1908 scb->status &= ~SCB_SELECT;
1909 host->active = NULL;
1910 }
1911 /* --------- get target id---------------------- */
1912 tar = inb(host->addr + TUL_SBusId);
1913 /* ------ get LUN from Identify message----------- */
1914 lun = inb(host->addr + TUL_SIdent) & 0x0F;
1915 /* 07/22/98 from 0x1F -> 0x0F */
1916 active_tc = &host->targets[tar];
1917 host->active_tc = active_tc;
1918 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1919 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1920
1921 /* ------------- tag queueing ? ------------------- */
1922 if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1923 if ((initio_msgin_accept(host)) == -1)
1924 return -1;
1925 if (host->phase != MSG_IN)
1926 goto no_tag;
1927 outl(1, host->addr + TUL_SCnt0);
1928 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1929 if (wait_tulip(host) == -1)
1930 return -1;
1931 msg = inb(host->addr + TUL_SFifo); /* Read Tag Message */
1932
1933 if (msg < MSG_STAG || msg > MSG_OTAG) /* Is simple Tag */
1934 goto no_tag;
1935
1936 if (initio_msgin_accept(host) == -1)
1937 return -1;
1938
1939 if (host->phase != MSG_IN)
1940 goto no_tag;
1941
1942 outl(1, host->addr + TUL_SCnt0);
1943 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1944 if (wait_tulip(host) == -1)
1945 return -1;
1946 tag = inb(host->addr + TUL_SFifo); /* Read Tag ID */
1947 scb = host->scb + tag;
1948 if (scb->target != tar || scb->lun != lun) {
1949 return initio_msgout_abort_tag(host);
1950 }
1951 if (scb->status != SCB_BUSY) { /* 03/24/95 */
1952 return initio_msgout_abort_tag(host);
1953 }
1954 host->active = scb;
1955 if ((initio_msgin_accept(host)) == -1)
1956 return -1;
1957 } else { /* No tag */
1958 no_tag:
1959 if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
1960 return initio_msgout_abort_targ(host);
1961 }
1962 host->active = scb;
1963 if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
1964 if ((initio_msgin_accept(host)) == -1)
1965 return -1;
1966 }
1967 }
1968 return 0;
1969 }
1970
1971 /**
1972 * int_initio_bad_seq - out of phase
1973 * @host: InitIO host flagging event
1974 *
1975 * We have ended up out of phase somehow. Reset the host controller
1976 * and throw all our toys out of the pram. Let the midlayer clean up
1977 */
1978
1979 static int int_initio_bad_seq(struct initio_host * host)
1980 { /* target wrong phase */
1981 struct scsi_ctrl_blk *scb;
1982 int i;
1983
1984 initio_reset_scsi(host, 10);
1985
1986 while ((scb = initio_pop_busy_scb(host)) != NULL) {
1987 scb->hastat = HOST_BAD_PHAS;
1988 initio_append_done_scb(host, scb);
1989 }
1990 for (i = 0; i < host->max_tar; i++)
1991 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1992 return -1;
1993 }
1994
1995
1996 /**
1997 * initio_msgout_abort_targ - abort a tag
1998 * @host: InitIO host
1999 *
2000 * Abort when the target/lun does not match or when our SCB is not
2001 * busy. Used by untagged commands.
2002 */
2003
2004 static int initio_msgout_abort_targ(struct initio_host * host)
2005 {
2006
2007 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2008 if (initio_msgin_accept(host) == -1)
2009 return -1;
2010 if (host->phase != MSG_OUT)
2011 return initio_bad_seq(host);
2012
2013 outb(MSG_ABORT, host->addr + TUL_SFifo);
2014 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2015
2016 return initio_wait_disc(host);
2017 }
2018
2019 /**
2020 * initio_msgout_abort_tag - abort a tag
2021 * @host: InitIO host
2022 *
2023 * Abort when the target/lun does not match or when our SCB is not
2024 * busy. Used for tagged commands.
2025 */
2026
2027 static int initio_msgout_abort_tag(struct initio_host * host)
2028 {
2029
2030 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2031 if (initio_msgin_accept(host) == -1)
2032 return -1;
2033 if (host->phase != MSG_OUT)
2034 return initio_bad_seq(host);
2035
2036 outb(MSG_ABORT_TAG, host->addr + TUL_SFifo);
2037 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2038
2039 return initio_wait_disc(host);
2040
2041 }
2042
2043 /**
2044 * initio_msgin - Message in
2045 * @host: InitIO Host
2046 *
2047 * Process incoming message
2048 */
2049 static int initio_msgin(struct initio_host * host)
2050 {
2051 struct target_control *active_tc;
2052
2053 for (;;) {
2054 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2055
2056 outl(1, host->addr + TUL_SCnt0);
2057 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2058 if (wait_tulip(host) == -1)
2059 return -1;
2060
2061 switch (inb(host->addr + TUL_SFifo)) {
2062 case MSG_DISC: /* Disconnect msg */
2063 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2064 return initio_wait_disc(host);
2065 case MSG_SDP:
2066 case MSG_RESTORE:
2067 case MSG_NOP:
2068 initio_msgin_accept(host);
2069 break;
2070 case MSG_REJ: /* Clear ATN first */
2071 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
2072 host->addr + TUL_SSignal);
2073 active_tc = host->active_tc;
2074 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) /* do sync nego */
2075 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
2076 host->addr + TUL_SSignal);
2077 initio_msgin_accept(host);
2078 break;
2079 case MSG_EXTEND: /* extended msg */
2080 initio_msgin_extend(host);
2081 break;
2082 case MSG_IGNOREWIDE:
2083 initio_msgin_accept(host);
2084 break;
2085 case MSG_COMP:
2086 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2087 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2088 return initio_wait_done_disc(host);
2089 default:
2090 initio_msgout_reject(host);
2091 break;
2092 }
2093 if (host->phase != MSG_IN)
2094 return host->phase;
2095 }
2096 /* statement won't reach here */
2097 }
2098
2099 static int initio_msgout_reject(struct initio_host * host)
2100 {
2101 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2102
2103 if (initio_msgin_accept(host) == -1)
2104 return -1;
2105
2106 if (host->phase == MSG_OUT) {
2107 outb(MSG_REJ, host->addr + TUL_SFifo); /* Msg reject */
2108 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2109 return wait_tulip(host);
2110 }
2111 return host->phase;
2112 }
2113
2114 static int initio_msgout_ide(struct initio_host * host)
2115 {
2116 outb(MSG_IDE, host->addr + TUL_SFifo); /* Initiator Detected Error */
2117 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2118 return wait_tulip(host);
2119 }
2120
2121 static int initio_msgin_extend(struct initio_host * host)
2122 {
2123 u8 len, idx;
2124
2125 if (initio_msgin_accept(host) != MSG_IN)
2126 return host->phase;
2127
2128 /* Get extended msg length */
2129 outl(1, host->addr + TUL_SCnt0);
2130 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2131 if (wait_tulip(host) == -1)
2132 return -1;
2133
2134 len = inb(host->addr + TUL_SFifo);
2135 host->msg[0] = len;
2136 for (idx = 1; len != 0; len--) {
2137
2138 if ((initio_msgin_accept(host)) != MSG_IN)
2139 return host->phase;
2140 outl(1, host->addr + TUL_SCnt0);
2141 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2142 if (wait_tulip(host) == -1)
2143 return -1;
2144 host->msg[idx++] = inb(host->addr + TUL_SFifo);
2145 }
2146 if (host->msg[1] == 1) { /* if it's synchronous data transfer request */
2147 u8 r;
2148 if (host->msg[0] != 3) /* if length is not right */
2149 return initio_msgout_reject(host);
2150 if (host->active_tc->flags & TCF_NO_SYNC_NEGO) { /* Set OFFSET=0 to do async, nego back */
2151 host->msg[3] = 0;
2152 } else {
2153 if (initio_msgin_sync(host) == 0 &&
2154 (host->active_tc->flags & TCF_SYNC_DONE)) {
2155 initio_sync_done(host);
2156 return initio_msgin_accept(host);
2157 }
2158 }
2159
2160 r = inb(host->addr + TUL_SSignal);
2161 outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
2162 host->addr + TUL_SSignal);
2163 if (initio_msgin_accept(host) != MSG_OUT)
2164 return host->phase;
2165 /* sync msg out */
2166 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2167
2168 initio_sync_done(host);
2169
2170 outb(MSG_EXTEND, host->addr + TUL_SFifo);
2171 outb(3, host->addr + TUL_SFifo);
2172 outb(1, host->addr + TUL_SFifo);
2173 outb(host->msg[2], host->addr + TUL_SFifo);
2174 outb(host->msg[3], host->addr + TUL_SFifo);
2175 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2176 return wait_tulip(host);
2177 }
2178 if (host->msg[0] != 2 || host->msg[1] != 3)
2179 return initio_msgout_reject(host);
2180 /* if it's WIDE DATA XFER REQ */
2181 if (host->active_tc->flags & TCF_NO_WDTR) {
2182 host->msg[2] = 0;
2183 } else {
2184 if (host->msg[2] > 2) /* > 32 bits */
2185 return initio_msgout_reject(host);
2186 if (host->msg[2] == 2) { /* == 32 */
2187 host->msg[2] = 1;
2188 } else {
2189 if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
2190 wdtr_done(host);
2191 if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
2192 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2193 return initio_msgin_accept(host);
2194 }
2195 }
2196 }
2197 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2198
2199 if (initio_msgin_accept(host) != MSG_OUT)
2200 return host->phase;
2201 /* WDTR msg out */
2202 outb(MSG_EXTEND, host->addr + TUL_SFifo);
2203 outb(2, host->addr + TUL_SFifo);
2204 outb(3, host->addr + TUL_SFifo);
2205 outb(host->msg[2], host->addr + TUL_SFifo);
2206 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2207 return wait_tulip(host);
2208 }
2209
2210 static int initio_msgin_sync(struct initio_host * host)
2211 {
2212 char default_period;
2213
2214 default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
2215 if (host->msg[3] > MAX_OFFSET) {
2216 host->msg[3] = MAX_OFFSET;
2217 if (host->msg[2] < default_period) {
2218 host->msg[2] = default_period;
2219 return 1;
2220 }
2221 if (host->msg[2] >= 59) /* Change to async */
2222 host->msg[3] = 0;
2223 return 1;
2224 }
2225 /* offset requests asynchronous transfers ? */
2226 if (host->msg[3] == 0) {
2227 return 0;
2228 }
2229 if (host->msg[2] < default_period) {
2230 host->msg[2] = default_period;
2231 return 1;
2232 }
2233 if (host->msg[2] >= 59) {
2234 host->msg[3] = 0;
2235 return 1;
2236 }
2237 return 0;
2238 }
2239
2240 static int wdtr_done(struct initio_host * host)
2241 {
2242 host->active_tc->flags &= ~TCF_SYNC_DONE;
2243 host->active_tc->flags |= TCF_WDTR_DONE;
2244
2245 host->active_tc->js_period = 0;
2246 if (host->msg[2]) /* if 16 bit */
2247 host->active_tc->js_period |= TSC_WIDE_SCSI;
2248 host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
2249 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2250 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2251
2252 return 1;
2253 }
2254
2255 static int initio_sync_done(struct initio_host * host)
2256 {
2257 int i;
2258
2259 host->active_tc->flags |= TCF_SYNC_DONE;
2260
2261 if (host->msg[3]) {
2262 host->active_tc->js_period |= host->msg[3];
2263 for (i = 0; i < 8; i++) {
2264 if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
2265 break;
2266 }
2267 host->active_tc->js_period |= (i << 4);
2268 host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
2269 }
2270 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2271 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2272
2273 return -1;
2274 }
2275
2276
2277 static int initio_post_scsi_rst(struct initio_host * host)
2278 {
2279 struct scsi_ctrl_blk *scb;
2280 struct target_control *active_tc;
2281 int i;
2282
2283 host->active = NULL;
2284 host->active_tc = NULL;
2285 host->flags = 0;
2286
2287 while ((scb = initio_pop_busy_scb(host)) != NULL) {
2288 scb->hastat = HOST_BAD_PHAS;
2289 initio_append_done_scb(host, scb);
2290 }
2291 /* clear sync done flag */
2292 active_tc = &host->targets[0];
2293 for (i = 0; i < host->max_tar; active_tc++, i++) {
2294 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2295 /* Initialize the sync. xfer register values to an asyn xfer */
2296 active_tc->js_period = 0;
2297 active_tc->sconfig0 = host->sconf1;
2298 host->act_tags[0] = 0; /* 07/22/98 */
2299 host->targets[i].flags &= ~TCF_BUSY; /* 07/22/98 */
2300 } /* for */
2301
2302 return -1;
2303 }
2304
2305 static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
2306 {
2307 scb->status |= SCB_SELECT;
2308 scb->next_state = 0x1;
2309 host->active = scb;
2310 host->active_tc = &host->targets[scb->target];
2311 outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
2312 }
2313
2314
2315 static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
2316 {
2317 int i;
2318
2319 scb->status |= SCB_SELECT;
2320 scb->next_state = 0x2;
2321
2322 outb(scb->ident, host->addr + TUL_SFifo);
2323 for (i = 0; i < (int) scb->cdblen; i++)
2324 outb(scb->cdb[i], host->addr + TUL_SFifo);
2325 host->active_tc = &host->targets[scb->target];
2326 host->active = scb;
2327 outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
2328 }
2329
2330 static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
2331 {
2332 int i;
2333
2334 scb->status |= SCB_SELECT;
2335 scb->next_state = 0x2;
2336
2337 outb(scb->ident, host->addr + TUL_SFifo);
2338 outb(scb->tagmsg, host->addr + TUL_SFifo);
2339 outb(scb->tagid, host->addr + TUL_SFifo);
2340 for (i = 0; i < scb->cdblen; i++)
2341 outb(scb->cdb[i], host->addr + TUL_SFifo);
2342 host->active_tc = &host->targets[scb->target];
2343 host->active = scb;
2344 outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
2345 }
2346
2347 /**
2348 * initio_bus_device_reset - SCSI Bus Device Reset
2349 * @host: InitIO host to reset
2350 *
2351 * Perform a device reset and abort all pending SCBs for the
2352 * victim device
2353 */
2354 int initio_bus_device_reset(struct initio_host * host)
2355 {
2356 struct scsi_ctrl_blk *scb = host->active;
2357 struct target_control *active_tc = host->active_tc;
2358 struct scsi_ctrl_blk *tmp, *prev;
2359 u8 tar;
2360
2361 if (host->phase != MSG_OUT)
2362 return int_initio_bad_seq(host); /* Unexpected phase */
2363
2364 initio_unlink_pend_scb(host, scb);
2365 initio_release_scb(host, scb);
2366
2367
2368 tar = scb->target; /* target */
2369 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
2370 /* clr sync. nego & WDTR flags 07/22/98 */
2371
2372 /* abort all SCB with same target */
2373 prev = tmp = host->first_busy; /* Check Busy queue */
2374 while (tmp != NULL) {
2375 if (tmp->target == tar) {
2376 /* unlink it */
2377 if (tmp == host->first_busy) {
2378 if ((host->first_busy = tmp->next) == NULL)
2379 host->last_busy = NULL;
2380 } else {
2381 prev->next = tmp->next;
2382 if (tmp == host->last_busy)
2383 host->last_busy = prev;
2384 }
2385 tmp->hastat = HOST_ABORTED;
2386 initio_append_done_scb(host, tmp);
2387 }
2388 /* Previous haven't change */
2389 else {
2390 prev = tmp;
2391 }
2392 tmp = tmp->next;
2393 }
2394 outb(MSG_DEVRST, host->addr + TUL_SFifo);
2395 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2396 return initio_wait_disc(host);
2397
2398 }
2399
2400 static int initio_msgin_accept(struct initio_host * host)
2401 {
2402 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2403 return wait_tulip(host);
2404 }
2405
2406 static int wait_tulip(struct initio_host * host)
2407 {
2408
2409 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2410 & TSS_INT_PENDING))
2411 cpu_relax();
2412
2413 host->jsint = inb(host->addr + TUL_SInt);
2414 host->phase = host->jsstatus0 & TSS_PH_MASK;
2415 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
2416
2417 if (host->jsint & TSS_RESEL_INT) /* if SCSI bus reset detected */
2418 return int_initio_resel(host);
2419 if (host->jsint & TSS_SEL_TIMEOUT) /* if selected/reselected timeout interrupt */
2420 return int_initio_busfree(host);
2421 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2422 return int_initio_scsi_rst(host);
2423
2424 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2425 if (host->flags & HCF_EXPECT_DONE_DISC) {
2426 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2427 initio_unlink_busy_scb(host, host->active);
2428 host->active->hastat = 0;
2429 initio_append_done_scb(host, host->active);
2430 host->active = NULL;
2431 host->active_tc = NULL;
2432 host->flags &= ~HCF_EXPECT_DONE_DISC;
2433 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2434 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2435 return -1;
2436 }
2437 if (host->flags & HCF_EXPECT_DISC) {
2438 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2439 host->active = NULL;
2440 host->active_tc = NULL;
2441 host->flags &= ~HCF_EXPECT_DISC;
2442 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2443 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2444 return -1;
2445 }
2446 return int_initio_busfree(host);
2447 }
2448 /* The old code really does the below. Can probably be removed */
2449 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
2450 return host->phase;
2451 return host->phase;
2452 }
2453
2454 static int initio_wait_disc(struct initio_host * host)
2455 {
2456 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
2457 cpu_relax();
2458
2459 host->jsint = inb(host->addr + TUL_SInt);
2460
2461 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2462 return int_initio_scsi_rst(host);
2463 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2464 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2465 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2466 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2467 host->active = NULL;
2468 return -1;
2469 }
2470 return initio_bad_seq(host);
2471 }
2472
2473 static int initio_wait_done_disc(struct initio_host * host)
2474 {
2475 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2476 & TSS_INT_PENDING))
2477 cpu_relax();
2478
2479 host->jsint = inb(host->addr + TUL_SInt);
2480
2481 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2482 return int_initio_scsi_rst(host);
2483 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2484 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2485 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2486 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2487 initio_unlink_busy_scb(host, host->active);
2488
2489 initio_append_done_scb(host, host->active);
2490 host->active = NULL;
2491 return -1;
2492 }
2493 return initio_bad_seq(host);
2494 }
2495
2496 /**
2497 * i91u_intr - IRQ handler
2498 * @irqno: IRQ number
2499 * @dev_id: IRQ identifier
2500 *
2501 * Take the relevant locks and then invoke the actual isr processing
2502 * code under the lock.
2503 */
2504
2505 static irqreturn_t i91u_intr(int irqno, void *dev_id)
2506 {
2507 struct Scsi_Host *dev = dev_id;
2508 unsigned long flags;
2509 int r;
2510
2511 spin_lock_irqsave(dev->host_lock, flags);
2512 r = initio_isr((struct initio_host *)dev->hostdata);
2513 spin_unlock_irqrestore(dev->host_lock, flags);
2514 if (r)
2515 return IRQ_HANDLED;
2516 else
2517 return IRQ_NONE;
2518 }
2519
2520
2521 /**
2522 * initio_build_scb - Build the mappings and SCB
2523 * @host: InitIO host taking the command
2524 * @cblk: Firmware command block
2525 * @cmnd: SCSI midlayer command block
2526 *
2527 * Translate the abstract SCSI command into a firmware command block
2528 * suitable for feeding to the InitIO host controller. This also requires
2529 * we build the scatter gather lists and ensure they are mapped properly.
2530 */
2531
2532 static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
2533 { /* Create corresponding SCB */
2534 struct scatterlist *sglist;
2535 struct sg_entry *sg; /* Pointer to SG list */
2536 int i, nseg;
2537 long total_len;
2538 dma_addr_t dma_addr;
2539
2540 /* Fill in the command headers */
2541 cblk->post = i91uSCBPost; /* i91u's callback routine */
2542 cblk->srb = cmnd;
2543 cblk->opcode = ExecSCSI;
2544 cblk->flags = SCF_POST; /* After SCSI done, call post routine */
2545 cblk->target = cmnd->device->id;
2546 cblk->lun = cmnd->device->lun;
2547 cblk->ident = cmnd->device->lun | DISC_ALLOW;
2548
2549 cblk->flags |= SCF_SENSE; /* Turn on auto request sense */
2550
2551 /* Map the sense buffer into bus memory */
2552 dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
2553 SENSE_SIZE, DMA_FROM_DEVICE);
2554 cblk->senseptr = (u32)dma_addr;
2555 cblk->senselen = SENSE_SIZE;
2556 cmnd->SCp.ptr = (char *)(unsigned long)dma_addr;
2557 cblk->cdblen = cmnd->cmd_len;
2558
2559 /* Clear the returned status */
2560 cblk->hastat = 0;
2561 cblk->tastat = 0;
2562 /* Command the command */
2563 memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
2564
2565 /* Set up tags */
2566 if (cmnd->device->tagged_supported) { /* Tag Support */
2567 cblk->tagmsg = SIMPLE_QUEUE_TAG; /* Do simple tag only */
2568 } else {
2569 cblk->tagmsg = 0; /* No tag support */
2570 }
2571
2572 /* todo handle map_sg error */
2573 nseg = scsi_dma_map(cmnd);
2574 BUG_ON(nseg < 0);
2575 if (nseg) {
2576 dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
2577 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2578 DMA_BIDIRECTIONAL);
2579 cblk->bufptr = (u32)dma_addr;
2580 cmnd->SCp.dma_handle = dma_addr;
2581
2582 cblk->sglen = nseg;
2583
2584 cblk->flags |= SCF_SG; /* Turn on SG list flag */
2585 total_len = 0;
2586 sg = &cblk->sglist[0];
2587 scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
2588 sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
2589 sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
2590 total_len += sg_dma_len(sglist);
2591 ++sg;
2592 }
2593
2594 cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
2595 total_len : scsi_bufflen(cmnd);
2596 } else { /* No data transfer required */
2597 cblk->buflen = 0;
2598 cblk->sglen = 0;
2599 }
2600 }
2601
2602 /**
2603 * i91u_queuecommand - Queue a new command if possible
2604 * @cmd: SCSI command block from the mid layer
2605 * @done: Completion handler
2606 *
2607 * Attempts to queue a new command with the host adapter. Will return
2608 * zero if successful or indicate a host busy condition if not (which
2609 * will cause the mid layer to call us again later with the command)
2610 */
2611
2612 static int i91u_queuecommand_lck(struct scsi_cmnd *cmd,
2613 void (*done)(struct scsi_cmnd *))
2614 {
2615 struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2616 struct scsi_ctrl_blk *cmnd;
2617
2618 cmd->scsi_done = done;
2619
2620 cmnd = initio_alloc_scb(host);
2621 if (!cmnd)
2622 return SCSI_MLQUEUE_HOST_BUSY;
2623
2624 initio_build_scb(host, cmnd, cmd);
2625 initio_exec_scb(host, cmnd);
2626 return 0;
2627 }
2628
2629 static DEF_SCSI_QCMD(i91u_queuecommand)
2630
2631 /**
2632 * i91u_bus_reset - reset the SCSI bus
2633 * @cmnd: Command block we want to trigger the reset for
2634 *
2635 * Initiate a SCSI bus reset sequence
2636 */
2637
2638 static int i91u_bus_reset(struct scsi_cmnd * cmnd)
2639 {
2640 struct initio_host *host;
2641
2642 host = (struct initio_host *) cmnd->device->host->hostdata;
2643
2644 spin_lock_irq(cmnd->device->host->host_lock);
2645 initio_reset_scsi(host, 0);
2646 spin_unlock_irq(cmnd->device->host->host_lock);
2647
2648 return SUCCESS;
2649 }
2650
2651 /**
2652 * i91u_biospararm - return the "logical geometry
2653 * @sdev: SCSI device
2654 * @dev; Matching block device
2655 * @capacity: Sector size of drive
2656 * @info_array: Return space for BIOS geometry
2657 *
2658 * Map the device geometry in a manner compatible with the host
2659 * controller BIOS behaviour.
2660 *
2661 * FIXME: limited to 2^32 sector devices.
2662 */
2663
2664 static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2665 sector_t capacity, int *info_array)
2666 {
2667 struct initio_host *host; /* Point to Host adapter control block */
2668 struct target_control *tc;
2669
2670 host = (struct initio_host *) sdev->host->hostdata;
2671 tc = &host->targets[sdev->id];
2672
2673 if (tc->heads) {
2674 info_array[0] = tc->heads;
2675 info_array[1] = tc->sectors;
2676 info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
2677 } else {
2678 if (tc->drv_flags & TCF_DRV_255_63) {
2679 info_array[0] = 255;
2680 info_array[1] = 63;
2681 info_array[2] = (unsigned long)capacity / 255 / 63;
2682 } else {
2683 info_array[0] = 64;
2684 info_array[1] = 32;
2685 info_array[2] = (unsigned long)capacity >> 11;
2686 }
2687 }
2688
2689 #if defined(DEBUG_BIOSPARAM)
2690 if (i91u_debug & debug_biosparam) {
2691 printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2692 info_array[0], info_array[1], info_array[2]);
2693 printk("WARNING: check, if the bios geometry is correct.\n");
2694 }
2695 #endif
2696
2697 return 0;
2698 }
2699
2700 /**
2701 * i91u_unmap_scb - Unmap a command
2702 * @pci_dev: PCI device the command is for
2703 * @cmnd: The command itself
2704 *
2705 * Unmap any PCI mapping/IOMMU resources allocated when the command
2706 * was mapped originally as part of initio_build_scb
2707 */
2708
2709 static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
2710 {
2711 /* auto sense buffer */
2712 if (cmnd->SCp.ptr) {
2713 dma_unmap_single(&pci_dev->dev,
2714 (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
2715 SENSE_SIZE, DMA_FROM_DEVICE);
2716 cmnd->SCp.ptr = NULL;
2717 }
2718
2719 /* request buffer */
2720 if (scsi_sg_count(cmnd)) {
2721 dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
2722 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2723 DMA_BIDIRECTIONAL);
2724
2725 scsi_dma_unmap(cmnd);
2726 }
2727 }
2728
2729 /**
2730 * i91uSCBPost - SCSI callback
2731 * @host: Pointer to host adapter control block.
2732 * @cmnd: Pointer to SCSI control block.
2733 *
2734 * This is callback routine be called when tulip finish one
2735 * SCSI command.
2736 */
2737
2738 static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2739 {
2740 struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2741 struct initio_host *host;
2742 struct scsi_ctrl_blk *cblk;
2743
2744 host = (struct initio_host *) host_mem;
2745 cblk = (struct scsi_ctrl_blk *) cblk_mem;
2746 if ((cmnd = cblk->srb) == NULL) {
2747 printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2748 WARN_ON(1);
2749 initio_release_scb(host, cblk); /* Release SCB for current channel */
2750 return;
2751 }
2752
2753 /*
2754 * Remap the firmware error status into a mid layer one
2755 */
2756 switch (cblk->hastat) {
2757 case 0x0:
2758 case 0xa: /* Linked command complete without error and linked normally */
2759 case 0xb: /* Linked command complete without error interrupt generated */
2760 cblk->hastat = 0;
2761 break;
2762
2763 case 0x11: /* Selection time out-The initiator selection or target
2764 reselection was not complete within the SCSI Time out period */
2765 cblk->hastat = DID_TIME_OUT;
2766 break;
2767
2768 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
2769 phase sequence was requested by the target. The host adapter
2770 will generate a SCSI Reset Condition, notifying the host with
2771 a SCRD interrupt */
2772 cblk->hastat = DID_RESET;
2773 break;
2774
2775 case 0x1a: /* SCB Aborted. 07/21/98 */
2776 cblk->hastat = DID_ABORT;
2777 break;
2778
2779 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
2780 than was allocated by the Data Length field or the sum of the
2781 Scatter / Gather Data Length fields. */
2782 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2783 case 0x16: /* Invalid SCB Operation Code. */
2784
2785 default:
2786 printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2787 cblk->hastat = DID_ERROR; /* Couldn't find any better */
2788 break;
2789 }
2790
2791 cmnd->result = cblk->tastat | (cblk->hastat << 16);
2792 i91u_unmap_scb(host->pci_dev, cmnd);
2793 cmnd->scsi_done(cmnd); /* Notify system DONE */
2794 initio_release_scb(host, cblk); /* Release SCB for current channel */
2795 }
2796
2797 static struct scsi_host_template initio_template = {
2798 .proc_name = "INI9100U",
2799 .name = "Initio INI-9X00U/UW SCSI device driver",
2800 .queuecommand = i91u_queuecommand,
2801 .eh_bus_reset_handler = i91u_bus_reset,
2802 .bios_param = i91u_biosparam,
2803 .can_queue = MAX_TARGETS * i91u_MAXQUEUE,
2804 .this_id = 1,
2805 .sg_tablesize = SG_ALL,
2806 };
2807
2808 static int initio_probe_one(struct pci_dev *pdev,
2809 const struct pci_device_id *id)
2810 {
2811 struct Scsi_Host *shost;
2812 struct initio_host *host;
2813 u32 reg;
2814 u16 bios_seg;
2815 struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2816 int num_scb, i, error;
2817
2818 error = pci_enable_device(pdev);
2819 if (error)
2820 return error;
2821
2822 pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2823 bios_seg = (u16) (reg & 0xFF);
2824 if (((reg & 0xFF00) >> 8) == 0xFF)
2825 reg = 0;
2826 bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2827
2828 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
2829 printk(KERN_WARNING "i91u: Could not set 32 bit DMA mask\n");
2830 error = -ENODEV;
2831 goto out_disable_device;
2832 }
2833 shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2834 if (!shost) {
2835 printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2836 error = -ENOMEM;
2837 goto out_disable_device;
2838 }
2839 host = (struct initio_host *)shost->hostdata;
2840 memset(host, 0, sizeof(struct initio_host));
2841 host->addr = pci_resource_start(pdev, 0);
2842 host->bios_addr = bios_seg;
2843
2844 if (!request_region(host->addr, 256, "i91u")) {
2845 printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2846 error = -ENODEV;
2847 goto out_host_put;
2848 }
2849
2850 if (initio_tag_enable) /* 1.01i */
2851 num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2852 else
2853 num_scb = MAX_TARGETS + 3; /* 1-tape, 1-CD_ROM, 1- extra */
2854
2855 for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2856 i = num_scb * sizeof(struct scsi_ctrl_blk);
2857 if ((scb = kzalloc(i, GFP_DMA)) != NULL)
2858 break;
2859 }
2860
2861 if (!scb) {
2862 printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2863 error = -ENOMEM;
2864 goto out_release_region;
2865 }
2866
2867 host->pci_dev = pdev;
2868
2869 host->semaph = 1;
2870 spin_lock_init(&host->semaph_lock);
2871 host->num_scbs = num_scb;
2872 host->scb = scb;
2873 host->next_pending = scb;
2874 host->next_avail = scb;
2875 for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2876 tmp->tagid = i;
2877 if (i != 0)
2878 prev->next = tmp;
2879 prev = tmp;
2880 }
2881 prev->next = NULL;
2882 host->scb_end = tmp;
2883 host->first_avail = scb;
2884 host->last_avail = prev;
2885 spin_lock_init(&host->avail_lock);
2886
2887 initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
2888
2889 host->jsstatus0 = 0;
2890
2891 shost->io_port = host->addr;
2892 shost->n_io_port = 0xff;
2893 shost->can_queue = num_scb; /* 03/05/98 */
2894 shost->unique_id = host->addr;
2895 shost->max_id = host->max_tar;
2896 shost->max_lun = 32; /* 10/21/97 */
2897 shost->irq = pdev->irq;
2898 shost->this_id = host->scsi_id; /* Assign HCS index */
2899 shost->base = host->addr;
2900 shost->sg_tablesize = TOTAL_SG_ENTRY;
2901
2902 error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
2903 if (error < 0) {
2904 printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2905 goto out_free_scbs;
2906 }
2907
2908 pci_set_drvdata(pdev, shost);
2909
2910 error = scsi_add_host(shost, &pdev->dev);
2911 if (error)
2912 goto out_free_irq;
2913 scsi_scan_host(shost);
2914 return 0;
2915 out_free_irq:
2916 free_irq(pdev->irq, shost);
2917 out_free_scbs:
2918 kfree(host->scb);
2919 out_release_region:
2920 release_region(host->addr, 256);
2921 out_host_put:
2922 scsi_host_put(shost);
2923 out_disable_device:
2924 pci_disable_device(pdev);
2925 return error;
2926 }
2927
2928 /**
2929 * initio_remove_one - control shutdown
2930 * @pdev: PCI device being released
2931 *
2932 * Release the resources assigned to this adapter after it has
2933 * finished being used.
2934 */
2935
2936 static void initio_remove_one(struct pci_dev *pdev)
2937 {
2938 struct Scsi_Host *host = pci_get_drvdata(pdev);
2939 struct initio_host *s = (struct initio_host *)host->hostdata;
2940 scsi_remove_host(host);
2941 free_irq(pdev->irq, host);
2942 release_region(s->addr, 256);
2943 scsi_host_put(host);
2944 pci_disable_device(pdev);
2945 }
2946
2947 MODULE_LICENSE("GPL");
2948
2949 static struct pci_device_id initio_pci_tbl[] = {
2950 {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2951 {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2952 {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2953 {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2954 {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2955 {0,}
2956 };
2957 MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2958
2959 static struct pci_driver initio_pci_driver = {
2960 .name = "initio",
2961 .id_table = initio_pci_tbl,
2962 .probe = initio_probe_one,
2963 .remove = initio_remove_one,
2964 };
2965
2966 static int __init initio_init_driver(void)
2967 {
2968 return pci_register_driver(&initio_pci_driver);
2969 }
2970
2971 static void __exit initio_exit_driver(void)
2972 {
2973 pci_unregister_driver(&initio_pci_driver);
2974 }
2975
2976 MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
2977 MODULE_AUTHOR("Initio Corporation");
2978 MODULE_LICENSE("GPL");
2979
2980 module_init(initio_init_driver);
2981 module_exit(initio_exit_driver);
Linux with added FPC-III support