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
initio_do_pause(unsigned amount)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
initio_se2_instr(unsigned long base,u8 instr)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 */
initio_se2_ew_en(unsigned long base)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 */
initio_se2_ew_ds(unsigned long base)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 */
initio_se2_rd(unsigned long base,u8 addr)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 */
initio_se2_wr(unsigned long base,u8 addr,u16 val)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
initio_se2_rd_all(unsigned long base)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 */
initio_se2_update_all(unsigned long base)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
initio_read_eeprom(unsigned long base)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
initio_stop_bm(struct initio_host * host)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
initio_reset_scsi(struct initio_host * host,int seconds)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 * @bios_addr: BIOS address
550 *
551 * Set up the host adapter and devices according to the configuration
552 * retrieved from the E2PROM.
553 *
554 * Locking: Calls E2PROM layer code which is not re-enterable so must
555 * run single threaded for now.
556 */
557
initio_init(struct initio_host * host,u8 * bios_addr)558 static void initio_init(struct initio_host * host, u8 *bios_addr)
559 {
560 int i;
561 u8 *flags;
562 u8 *heads;
563
564 /* Get E2Prom configuration */
565 initio_read_eeprom(host->addr);
566 if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
567 host->max_tar = 8;
568 else
569 host->max_tar = 16;
570
571 host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
572
573 host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
574 host->idmask = ~(1 << host->scsi_id);
575
576 #ifdef CHK_PARITY
577 /* Enable parity error response */
578 outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
579 #endif
580
581 /* Mask all the interrupt */
582 outb(0x1F, host->addr + TUL_Mask);
583
584 initio_stop_bm(host);
585 /* --- Initialize the tulip --- */
586 outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
587
588 /* program HBA's SCSI ID */
589 outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
590
591 /* Enable Initiator Mode ,phase latch,alternate sync period mode,
592 disable SCSI reset */
593 if (host->config & HCC_EN_PAR)
594 host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
595 else
596 host->sconf1 = (TSC_INITDEFAULT);
597 outb(host->sconf1, host->addr + TUL_SConfig);
598
599 /* Enable HW reselect */
600 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
601
602 outb(0, host->addr + TUL_SPeriod);
603
604 /* selection time out = 250 ms */
605 outb(153, host->addr + TUL_STimeOut);
606
607 /* Enable SCSI terminator */
608 outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
609 host->addr + TUL_XCtrl);
610 outb(((host->config & HCC_AUTO_TERM) >> 4) |
611 (inb(host->addr + TUL_GCTRL1) & 0xFE),
612 host->addr + TUL_GCTRL1);
613
614 for (i = 0,
615 flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
616 heads = bios_addr + 0x180;
617 i < host->max_tar;
618 i++, flags++) {
619 host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
620 if (host->targets[i].flags & TCF_EN_255)
621 host->targets[i].drv_flags = TCF_DRV_255_63;
622 else
623 host->targets[i].drv_flags = 0;
624 host->targets[i].js_period = 0;
625 host->targets[i].sconfig0 = host->sconf1;
626 host->targets[i].heads = *heads++;
627 if (host->targets[i].heads == 255)
628 host->targets[i].drv_flags = TCF_DRV_255_63;
629 else
630 host->targets[i].drv_flags = 0;
631 host->targets[i].sectors = *heads++;
632 host->targets[i].flags &= ~TCF_BUSY;
633 host->act_tags[i] = 0;
634 host->max_tags[i] = 0xFF;
635 } /* for */
636 printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
637 host->addr, host->pci_dev->irq,
638 host->bios_addr, host->scsi_id);
639 /* Reset SCSI Bus */
640 if (host->config & HCC_SCSI_RESET) {
641 printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
642 initio_reset_scsi(host, 10);
643 }
644 outb(0x17, host->addr + TUL_SCFG1);
645 outb(0xE9, host->addr + TUL_SIntEnable);
646 }
647
648 /**
649 * initio_alloc_scb - Allocate an SCB
650 * @host: InitIO host we are allocating for
651 *
652 * Walk the SCB list for the controller and allocate a free SCB if
653 * one exists.
654 */
initio_alloc_scb(struct initio_host * host)655 static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
656 {
657 struct scsi_ctrl_blk *scb;
658 unsigned long flags;
659
660 spin_lock_irqsave(&host->avail_lock, flags);
661 if ((scb = host->first_avail) != NULL) {
662 #if DEBUG_QUEUE
663 printk("find scb at %p\n", scb);
664 #endif
665 if ((host->first_avail = scb->next) == NULL)
666 host->last_avail = NULL;
667 scb->next = NULL;
668 scb->status = SCB_RENT;
669 }
670 spin_unlock_irqrestore(&host->avail_lock, flags);
671 return scb;
672 }
673
674 /**
675 * initio_release_scb - Release an SCB
676 * @host: InitIO host that owns the SCB
677 * @cmnd: SCB command block being returned
678 *
679 * Return an allocated SCB to the host free list
680 */
681
initio_release_scb(struct initio_host * host,struct scsi_ctrl_blk * cmnd)682 static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
683 {
684 unsigned long flags;
685
686 #if DEBUG_QUEUE
687 printk("Release SCB %p; ", cmnd);
688 #endif
689 spin_lock_irqsave(&(host->avail_lock), flags);
690 cmnd->srb = NULL;
691 cmnd->status = 0;
692 cmnd->next = NULL;
693 if (host->last_avail != NULL) {
694 host->last_avail->next = cmnd;
695 host->last_avail = cmnd;
696 } else {
697 host->first_avail = cmnd;
698 host->last_avail = cmnd;
699 }
700 spin_unlock_irqrestore(&(host->avail_lock), flags);
701 }
702
703 /***************************************************************************/
initio_append_pend_scb(struct initio_host * host,struct scsi_ctrl_blk * scbp)704 static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
705 {
706
707 #if DEBUG_QUEUE
708 printk("Append pend SCB %p; ", scbp);
709 #endif
710 scbp->status = SCB_PEND;
711 scbp->next = NULL;
712 if (host->last_pending != NULL) {
713 host->last_pending->next = scbp;
714 host->last_pending = scbp;
715 } else {
716 host->first_pending = scbp;
717 host->last_pending = scbp;
718 }
719 }
720
721 /***************************************************************************/
initio_push_pend_scb(struct initio_host * host,struct scsi_ctrl_blk * scbp)722 static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
723 {
724
725 #if DEBUG_QUEUE
726 printk("Push pend SCB %p; ", scbp);
727 #endif
728 scbp->status = SCB_PEND;
729 if ((scbp->next = host->first_pending) != NULL) {
730 host->first_pending = scbp;
731 } else {
732 host->first_pending = scbp;
733 host->last_pending = scbp;
734 }
735 }
736
initio_find_first_pend_scb(struct initio_host * host)737 static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
738 {
739 struct scsi_ctrl_blk *first;
740
741
742 first = host->first_pending;
743 while (first != NULL) {
744 if (first->opcode != ExecSCSI)
745 return first;
746 if (first->tagmsg == 0) {
747 if ((host->act_tags[first->target] == 0) &&
748 !(host->targets[first->target].flags & TCF_BUSY))
749 return first;
750 } else {
751 if ((host->act_tags[first->target] >=
752 host->max_tags[first->target]) |
753 (host->targets[first->target].flags & TCF_BUSY)) {
754 first = first->next;
755 continue;
756 }
757 return first;
758 }
759 first = first->next;
760 }
761 return first;
762 }
763
initio_unlink_pend_scb(struct initio_host * host,struct scsi_ctrl_blk * scb)764 static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
765 {
766 struct scsi_ctrl_blk *tmp, *prev;
767
768 #if DEBUG_QUEUE
769 printk("unlink pend SCB %p; ", scb);
770 #endif
771
772 prev = tmp = host->first_pending;
773 while (tmp != NULL) {
774 if (scb == tmp) { /* Unlink this SCB */
775 if (tmp == host->first_pending) {
776 if ((host->first_pending = tmp->next) == NULL)
777 host->last_pending = NULL;
778 } else {
779 prev->next = tmp->next;
780 if (tmp == host->last_pending)
781 host->last_pending = prev;
782 }
783 tmp->next = NULL;
784 break;
785 }
786 prev = tmp;
787 tmp = tmp->next;
788 }
789 }
790
initio_append_busy_scb(struct initio_host * host,struct scsi_ctrl_blk * scbp)791 static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
792 {
793
794 #if DEBUG_QUEUE
795 printk("append busy SCB %p; ", scbp);
796 #endif
797 if (scbp->tagmsg)
798 host->act_tags[scbp->target]++;
799 else
800 host->targets[scbp->target].flags |= TCF_BUSY;
801 scbp->status = SCB_BUSY;
802 scbp->next = NULL;
803 if (host->last_busy != NULL) {
804 host->last_busy->next = scbp;
805 host->last_busy = scbp;
806 } else {
807 host->first_busy = scbp;
808 host->last_busy = scbp;
809 }
810 }
811
812 /***************************************************************************/
initio_pop_busy_scb(struct initio_host * host)813 static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
814 {
815 struct scsi_ctrl_blk *tmp;
816
817
818 if ((tmp = host->first_busy) != NULL) {
819 if ((host->first_busy = tmp->next) == NULL)
820 host->last_busy = NULL;
821 tmp->next = NULL;
822 if (tmp->tagmsg)
823 host->act_tags[tmp->target]--;
824 else
825 host->targets[tmp->target].flags &= ~TCF_BUSY;
826 }
827 #if DEBUG_QUEUE
828 printk("Pop busy SCB %p; ", tmp);
829 #endif
830 return tmp;
831 }
832
833 /***************************************************************************/
initio_unlink_busy_scb(struct initio_host * host,struct scsi_ctrl_blk * scb)834 static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
835 {
836 struct scsi_ctrl_blk *tmp, *prev;
837
838 #if DEBUG_QUEUE
839 printk("unlink busy SCB %p; ", scb);
840 #endif
841
842 prev = tmp = host->first_busy;
843 while (tmp != NULL) {
844 if (scb == tmp) { /* Unlink this SCB */
845 if (tmp == host->first_busy) {
846 if ((host->first_busy = tmp->next) == NULL)
847 host->last_busy = NULL;
848 } else {
849 prev->next = tmp->next;
850 if (tmp == host->last_busy)
851 host->last_busy = prev;
852 }
853 tmp->next = NULL;
854 if (tmp->tagmsg)
855 host->act_tags[tmp->target]--;
856 else
857 host->targets[tmp->target].flags &= ~TCF_BUSY;
858 break;
859 }
860 prev = tmp;
861 tmp = tmp->next;
862 }
863 return;
864 }
865
initio_find_busy_scb(struct initio_host * host,u16 tarlun)866 struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
867 {
868 struct scsi_ctrl_blk *tmp;
869 u16 scbp_tarlun;
870
871
872 tmp = host->first_busy;
873 while (tmp != NULL) {
874 scbp_tarlun = (tmp->lun << 8) | (tmp->target);
875 if (scbp_tarlun == tarlun) { /* Unlink this SCB */
876 break;
877 }
878 tmp = tmp->next;
879 }
880 #if DEBUG_QUEUE
881 printk("find busy SCB %p; ", tmp);
882 #endif
883 return tmp;
884 }
885
initio_append_done_scb(struct initio_host * host,struct scsi_ctrl_blk * scbp)886 static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
887 {
888 #if DEBUG_QUEUE
889 printk("append done SCB %p; ", scbp);
890 #endif
891
892 scbp->status = SCB_DONE;
893 scbp->next = NULL;
894 if (host->last_done != NULL) {
895 host->last_done->next = scbp;
896 host->last_done = scbp;
897 } else {
898 host->first_done = scbp;
899 host->last_done = scbp;
900 }
901 }
902
initio_find_done_scb(struct initio_host * host)903 struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
904 {
905 struct scsi_ctrl_blk *tmp;
906
907 if ((tmp = host->first_done) != NULL) {
908 if ((host->first_done = tmp->next) == NULL)
909 host->last_done = NULL;
910 tmp->next = NULL;
911 }
912 #if DEBUG_QUEUE
913 printk("find done SCB %p; ",tmp);
914 #endif
915 return tmp;
916 }
917
initio_abort_srb(struct initio_host * host,struct scsi_cmnd * srbp)918 static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
919 {
920 unsigned long flags;
921 struct scsi_ctrl_blk *tmp, *prev;
922
923 spin_lock_irqsave(&host->semaph_lock, flags);
924
925 if ((host->semaph == 0) && (host->active == NULL)) {
926 /* disable Jasmin SCSI Int */
927 outb(0x1F, host->addr + TUL_Mask);
928 spin_unlock_irqrestore(&host->semaph_lock, flags);
929 /* FIXME: synchronize_irq needed ? */
930 tulip_main(host);
931 spin_lock_irqsave(&host->semaph_lock, flags);
932 host->semaph = 1;
933 outb(0x0F, host->addr + TUL_Mask);
934 spin_unlock_irqrestore(&host->semaph_lock, flags);
935 return SCSI_ABORT_SNOOZE;
936 }
937 prev = tmp = host->first_pending; /* Check Pend queue */
938 while (tmp != NULL) {
939 /* 07/27/98 */
940 if (tmp->srb == srbp) {
941 if (tmp == host->active) {
942 spin_unlock_irqrestore(&host->semaph_lock, flags);
943 return SCSI_ABORT_BUSY;
944 } else if (tmp == host->first_pending) {
945 if ((host->first_pending = tmp->next) == NULL)
946 host->last_pending = NULL;
947 } else {
948 prev->next = tmp->next;
949 if (tmp == host->last_pending)
950 host->last_pending = prev;
951 }
952 tmp->hastat = HOST_ABORTED;
953 tmp->flags |= SCF_DONE;
954 if (tmp->flags & SCF_POST)
955 (*tmp->post) ((u8 *) host, (u8 *) tmp);
956 spin_unlock_irqrestore(&host->semaph_lock, flags);
957 return SCSI_ABORT_SUCCESS;
958 }
959 prev = tmp;
960 tmp = tmp->next;
961 }
962
963 prev = tmp = host->first_busy; /* Check Busy queue */
964 while (tmp != NULL) {
965 if (tmp->srb == srbp) {
966 if (tmp == host->active) {
967 spin_unlock_irqrestore(&host->semaph_lock, flags);
968 return SCSI_ABORT_BUSY;
969 } else if (tmp->tagmsg == 0) {
970 spin_unlock_irqrestore(&host->semaph_lock, flags);
971 return SCSI_ABORT_BUSY;
972 } else {
973 host->act_tags[tmp->target]--;
974 if (tmp == host->first_busy) {
975 if ((host->first_busy = tmp->next) == NULL)
976 host->last_busy = NULL;
977 } else {
978 prev->next = tmp->next;
979 if (tmp == host->last_busy)
980 host->last_busy = prev;
981 }
982 tmp->next = NULL;
983
984
985 tmp->hastat = HOST_ABORTED;
986 tmp->flags |= SCF_DONE;
987 if (tmp->flags & SCF_POST)
988 (*tmp->post) ((u8 *) host, (u8 *) tmp);
989 spin_unlock_irqrestore(&host->semaph_lock, flags);
990 return SCSI_ABORT_SUCCESS;
991 }
992 }
993 prev = tmp;
994 tmp = tmp->next;
995 }
996 spin_unlock_irqrestore(&host->semaph_lock, flags);
997 return SCSI_ABORT_NOT_RUNNING;
998 }
999
1000 /***************************************************************************/
initio_bad_seq(struct initio_host * host)1001 static int initio_bad_seq(struct initio_host * host)
1002 {
1003 struct scsi_ctrl_blk *scb;
1004
1005 printk("initio_bad_seg c=%d\n", host->index);
1006
1007 if ((scb = host->active) != NULL) {
1008 initio_unlink_busy_scb(host, scb);
1009 scb->hastat = HOST_BAD_PHAS;
1010 scb->tastat = 0;
1011 initio_append_done_scb(host, scb);
1012 }
1013 initio_stop_bm(host);
1014 initio_reset_scsi(host, 8); /* 7/29/98 */
1015 return initio_post_scsi_rst(host);
1016 }
1017
1018
1019 /************************************************************************/
initio_exec_scb(struct initio_host * host,struct scsi_ctrl_blk * scb)1020 static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1021 {
1022 unsigned long flags;
1023
1024 scb->mode = 0;
1025
1026 scb->sgidx = 0;
1027 scb->sgmax = scb->sglen;
1028
1029 spin_lock_irqsave(&host->semaph_lock, flags);
1030
1031 initio_append_pend_scb(host, scb); /* Append this SCB to Pending queue */
1032
1033 /* VVVVV 07/21/98 */
1034 if (host->semaph == 1) {
1035 /* Disable Jasmin SCSI Int */
1036 outb(0x1F, host->addr + TUL_Mask);
1037 host->semaph = 0;
1038 spin_unlock_irqrestore(&host->semaph_lock, flags);
1039
1040 tulip_main(host);
1041
1042 spin_lock_irqsave(&host->semaph_lock, flags);
1043 host->semaph = 1;
1044 outb(0x0F, host->addr + TUL_Mask);
1045 }
1046 spin_unlock_irqrestore(&host->semaph_lock, flags);
1047 return;
1048 }
1049
1050 /***************************************************************************/
initio_isr(struct initio_host * host)1051 static int initio_isr(struct initio_host * host)
1052 {
1053 if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1054 if (host->semaph == 1) {
1055 outb(0x1F, host->addr + TUL_Mask);
1056 /* Disable Tulip SCSI Int */
1057 host->semaph = 0;
1058
1059 tulip_main(host);
1060
1061 host->semaph = 1;
1062 outb(0x0F, host->addr + TUL_Mask);
1063 return 1;
1064 }
1065 }
1066 return 0;
1067 }
1068
tulip_main(struct initio_host * host)1069 static int tulip_main(struct initio_host * host)
1070 {
1071 struct scsi_ctrl_blk *scb;
1072
1073 for (;;) {
1074 tulip_scsi(host); /* Call tulip_scsi */
1075
1076 /* Walk the list of completed SCBs */
1077 while ((scb = initio_find_done_scb(host)) != NULL) { /* find done entry */
1078 if (scb->tastat == INI_QUEUE_FULL) {
1079 host->max_tags[scb->target] =
1080 host->act_tags[scb->target] - 1;
1081 scb->tastat = 0;
1082 initio_append_pend_scb(host, scb);
1083 continue;
1084 }
1085 if (!(scb->mode & SCM_RSENS)) { /* not in auto req. sense mode */
1086 if (scb->tastat == 2) {
1087
1088 /* clr sync. nego flag */
1089
1090 if (scb->flags & SCF_SENSE) {
1091 u8 len;
1092 len = scb->senselen;
1093 if (len == 0)
1094 len = 1;
1095 scb->buflen = scb->senselen;
1096 scb->bufptr = scb->senseptr;
1097 scb->flags &= ~(SCF_SG | SCF_DIR); /* for xfer_data_in */
1098 /* so, we won't report wrong direction in xfer_data_in,
1099 and won't report HOST_DO_DU in state_6 */
1100 scb->mode = SCM_RSENS;
1101 scb->ident &= 0xBF; /* Disable Disconnect */
1102 scb->tagmsg = 0;
1103 scb->tastat = 0;
1104 scb->cdblen = 6;
1105 scb->cdb[0] = SCSICMD_RequestSense;
1106 scb->cdb[1] = 0;
1107 scb->cdb[2] = 0;
1108 scb->cdb[3] = 0;
1109 scb->cdb[4] = len;
1110 scb->cdb[5] = 0;
1111 initio_push_pend_scb(host, scb);
1112 break;
1113 }
1114 }
1115 } else { /* in request sense mode */
1116
1117 if (scb->tastat == 2) { /* check contition status again after sending
1118 requset sense cmd 0x3 */
1119 scb->hastat = HOST_BAD_PHAS;
1120 }
1121 scb->tastat = 2;
1122 }
1123 scb->flags |= SCF_DONE;
1124 if (scb->flags & SCF_POST) {
1125 /* FIXME: only one post method and lose casts */
1126 (*scb->post) ((u8 *) host, (u8 *) scb);
1127 }
1128 } /* while */
1129 /* find_active: */
1130 if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1131 continue;
1132 if (host->active) /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1133 return 1; /* return to OS, enable interrupt */
1134 /* Check pending SCB */
1135 if (initio_find_first_pend_scb(host) == NULL)
1136 return 1; /* return to OS, enable interrupt */
1137 } /* End of for loop */
1138 /* statement won't reach here */
1139 }
1140
tulip_scsi(struct initio_host * host)1141 static void tulip_scsi(struct initio_host * host)
1142 {
1143 struct scsi_ctrl_blk *scb;
1144 struct target_control *active_tc;
1145
1146 /* make sure to service interrupt asap */
1147 if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1148 host->phase = host->jsstatus0 & TSS_PH_MASK;
1149 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1150 host->jsint = inb(host->addr + TUL_SInt);
1151 if (host->jsint & TSS_SCSIRST_INT) { /* SCSI bus reset detected */
1152 int_initio_scsi_rst(host);
1153 return;
1154 }
1155 if (host->jsint & TSS_RESEL_INT) { /* if selected/reselected interrupt */
1156 if (int_initio_resel(host) == 0)
1157 initio_next_state(host);
1158 return;
1159 }
1160 if (host->jsint & TSS_SEL_TIMEOUT) {
1161 int_initio_busfree(host);
1162 return;
1163 }
1164 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
1165 int_initio_busfree(host); /* unexpected bus free or sel timeout */
1166 return;
1167 }
1168 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) { /* func complete or Bus service */
1169 if (host->active)
1170 initio_next_state(host);
1171 return;
1172 }
1173 }
1174 if (host->active != NULL)
1175 return;
1176
1177 if ((scb = initio_find_first_pend_scb(host)) == NULL)
1178 return;
1179
1180 /* program HBA's SCSI ID & target SCSI ID */
1181 outb((host->scsi_id << 4) | (scb->target & 0x0F),
1182 host->addr + TUL_SScsiId);
1183 if (scb->opcode == ExecSCSI) {
1184 active_tc = &host->targets[scb->target];
1185
1186 if (scb->tagmsg)
1187 active_tc->drv_flags |= TCF_DRV_EN_TAG;
1188 else
1189 active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1190
1191 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1192 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) { /* do wdtr negotiation */
1193 initio_select_atn_stop(host, scb);
1194 } else {
1195 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { /* do sync negotiation */
1196 initio_select_atn_stop(host, scb);
1197 } else {
1198 if (scb->tagmsg)
1199 initio_select_atn3(host, scb);
1200 else
1201 initio_select_atn(host, scb);
1202 }
1203 }
1204 if (scb->flags & SCF_POLL) {
1205 while (wait_tulip(host) != -1) {
1206 if (initio_next_state(host) == -1)
1207 break;
1208 }
1209 }
1210 } else if (scb->opcode == BusDevRst) {
1211 initio_select_atn_stop(host, scb);
1212 scb->next_state = 8;
1213 if (scb->flags & SCF_POLL) {
1214 while (wait_tulip(host) != -1) {
1215 if (initio_next_state(host) == -1)
1216 break;
1217 }
1218 }
1219 } else if (scb->opcode == AbortCmd) {
1220 if (initio_abort_srb(host, scb->srb) != 0) {
1221 initio_unlink_pend_scb(host, scb);
1222 initio_release_scb(host, scb);
1223 } else {
1224 scb->opcode = BusDevRst;
1225 initio_select_atn_stop(host, scb);
1226 scb->next_state = 8;
1227 }
1228 } else {
1229 initio_unlink_pend_scb(host, scb);
1230 scb->hastat = 0x16; /* bad command */
1231 initio_append_done_scb(host, scb);
1232 }
1233 return;
1234 }
1235
1236 /**
1237 * initio_next_state - Next SCSI state
1238 * @host: InitIO host we are processing
1239 *
1240 * Progress the active command block along the state machine
1241 * until we hit a state which we must wait for activity to occur.
1242 *
1243 * Returns zero or a negative code.
1244 */
1245
initio_next_state(struct initio_host * host)1246 static int initio_next_state(struct initio_host * host)
1247 {
1248 int next;
1249
1250 next = host->active->next_state;
1251 for (;;) {
1252 switch (next) {
1253 case 1:
1254 next = initio_state_1(host);
1255 break;
1256 case 2:
1257 next = initio_state_2(host);
1258 break;
1259 case 3:
1260 next = initio_state_3(host);
1261 break;
1262 case 4:
1263 next = initio_state_4(host);
1264 break;
1265 case 5:
1266 next = initio_state_5(host);
1267 break;
1268 case 6:
1269 next = initio_state_6(host);
1270 break;
1271 case 7:
1272 next = initio_state_7(host);
1273 break;
1274 case 8:
1275 return initio_bus_device_reset(host);
1276 default:
1277 return initio_bad_seq(host);
1278 }
1279 if (next <= 0)
1280 return next;
1281 }
1282 }
1283
1284
1285 /**
1286 * initio_state_1 - SCSI state machine
1287 * @host: InitIO host we are controlling
1288 *
1289 * Perform SCSI state processing for Select/Attention/Stop
1290 */
1291
initio_state_1(struct initio_host * host)1292 static int initio_state_1(struct initio_host * host)
1293 {
1294 struct scsi_ctrl_blk *scb = host->active;
1295 struct target_control *active_tc = host->active_tc;
1296 #if DEBUG_STATE
1297 printk("-s1-");
1298 #endif
1299
1300 /* Move the SCB from pending to busy */
1301 initio_unlink_pend_scb(host, scb);
1302 initio_append_busy_scb(host, scb);
1303
1304 outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1305 /* ATN on */
1306 if (host->phase == MSG_OUT) {
1307 outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1308 outb(scb->ident, host->addr + TUL_SFifo);
1309
1310 if (scb->tagmsg) {
1311 outb(scb->tagmsg, host->addr + TUL_SFifo);
1312 outb(scb->tagid, host->addr + TUL_SFifo);
1313 }
1314 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1315 active_tc->flags |= TCF_WDTR_DONE;
1316 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1317 outb(2, host->addr + TUL_SFifo); /* Extended msg length */
1318 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); /* Sync request */
1319 outb(1, host->addr + TUL_SFifo); /* Start from 16 bits */
1320 } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1321 active_tc->flags |= TCF_SYNC_DONE;
1322 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1323 outb(3, host->addr + TUL_SFifo); /* extended msg length */
1324 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); /* sync request */
1325 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1326 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1327 }
1328 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1329 if (wait_tulip(host) == -1)
1330 return -1;
1331 }
1332 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1333 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1334 /* Into before CDB xfer */
1335 return 3;
1336 }
1337
1338
1339 /**
1340 * initio_state_2 - SCSI state machine
1341 * @host: InitIO host we are controlling
1342 *
1343 * state after selection with attention
1344 * state after selection with attention3
1345 */
1346
initio_state_2(struct initio_host * host)1347 static int initio_state_2(struct initio_host * host)
1348 {
1349 struct scsi_ctrl_blk *scb = host->active;
1350 struct target_control *active_tc = host->active_tc;
1351 #if DEBUG_STATE
1352 printk("-s2-");
1353 #endif
1354
1355 initio_unlink_pend_scb(host, scb);
1356 initio_append_busy_scb(host, scb);
1357
1358 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1359
1360 if (host->jsstatus1 & TSS_CMD_PH_CMP)
1361 return 4;
1362
1363 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1364 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1365 /* Into before CDB xfer */
1366 return 3;
1367 }
1368
1369 /**
1370 * initio_state_3 - SCSI state machine
1371 * @host: InitIO host we are controlling
1372 *
1373 * state before CDB xfer is done
1374 */
1375
initio_state_3(struct initio_host * host)1376 static int initio_state_3(struct initio_host * host)
1377 {
1378 struct scsi_ctrl_blk *scb = host->active;
1379 struct target_control *active_tc = host->active_tc;
1380 int i;
1381
1382 #if DEBUG_STATE
1383 printk("-s3-");
1384 #endif
1385 for (;;) {
1386 switch (host->phase) {
1387 case CMD_OUT: /* Command out phase */
1388 for (i = 0; i < (int) scb->cdblen; i++)
1389 outb(scb->cdb[i], host->addr + TUL_SFifo);
1390 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1391 if (wait_tulip(host) == -1)
1392 return -1;
1393 if (host->phase == CMD_OUT)
1394 return initio_bad_seq(host);
1395 return 4;
1396
1397 case MSG_IN: /* Message in phase */
1398 scb->next_state = 3;
1399 if (initio_msgin(host) == -1)
1400 return -1;
1401 break;
1402
1403 case STATUS_IN: /* Status phase */
1404 if (initio_status_msg(host) == -1)
1405 return -1;
1406 break;
1407
1408 case MSG_OUT: /* Message out phase */
1409 if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1410 outb(NOP, host->addr + TUL_SFifo); /* msg nop */
1411 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1412 if (wait_tulip(host) == -1)
1413 return -1;
1414 } else {
1415 active_tc->flags |= TCF_SYNC_DONE;
1416
1417 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1418 outb(3, host->addr + TUL_SFifo); /* ext. msg len */
1419 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); /* sync request */
1420 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1421 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1422 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1423 if (wait_tulip(host) == -1)
1424 return -1;
1425 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1426 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1427
1428 }
1429 break;
1430 default:
1431 return initio_bad_seq(host);
1432 }
1433 }
1434 }
1435
1436 /**
1437 * initio_state_4 - SCSI state machine
1438 * @host: InitIO host we are controlling
1439 *
1440 * SCSI state machine. State 4
1441 */
1442
initio_state_4(struct initio_host * host)1443 static int initio_state_4(struct initio_host * host)
1444 {
1445 struct scsi_ctrl_blk *scb = host->active;
1446
1447 #if DEBUG_STATE
1448 printk("-s4-");
1449 #endif
1450 if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1451 return 6; /* Go to state 6 (After data) */
1452 }
1453 for (;;) {
1454 if (scb->buflen == 0)
1455 return 6;
1456
1457 switch (host->phase) {
1458
1459 case STATUS_IN: /* Status phase */
1460 if ((scb->flags & SCF_DIR) != 0) /* if direction bit set then report data underrun */
1461 scb->hastat = HOST_DO_DU;
1462 if ((initio_status_msg(host)) == -1)
1463 return -1;
1464 break;
1465
1466 case MSG_IN: /* Message in phase */
1467 scb->next_state = 0x4;
1468 if (initio_msgin(host) == -1)
1469 return -1;
1470 break;
1471
1472 case MSG_OUT: /* Message out phase */
1473 if (host->jsstatus0 & TSS_PAR_ERROR) {
1474 scb->buflen = 0;
1475 scb->hastat = HOST_DO_DU;
1476 if (initio_msgout_ide(host) == -1)
1477 return -1;
1478 return 6;
1479 } else {
1480 outb(NOP, host->addr + TUL_SFifo); /* msg nop */
1481 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1482 if (wait_tulip(host) == -1)
1483 return -1;
1484 }
1485 break;
1486
1487 case DATA_IN: /* Data in phase */
1488 return initio_xfer_data_in(host);
1489
1490 case DATA_OUT: /* Data out phase */
1491 return initio_xfer_data_out(host);
1492
1493 default:
1494 return initio_bad_seq(host);
1495 }
1496 }
1497 }
1498
1499
1500 /**
1501 * initio_state_5 - SCSI state machine
1502 * @host: InitIO host we are controlling
1503 *
1504 * State after dma xfer done or phase change before xfer done
1505 */
1506
initio_state_5(struct initio_host * host)1507 static int initio_state_5(struct initio_host * host)
1508 {
1509 struct scsi_ctrl_blk *scb = host->active;
1510 long cnt, xcnt; /* cannot use unsigned !! code: if (xcnt < 0) */
1511
1512 #if DEBUG_STATE
1513 printk("-s5-");
1514 #endif
1515 /*------ get remaining count -------*/
1516 cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1517
1518 if (inb(host->addr + TUL_XCmd) & 0x20) {
1519 /* ----------------------- DATA_IN ----------------------------- */
1520 /* check scsi parity error */
1521 if (host->jsstatus0 & TSS_PAR_ERROR)
1522 scb->hastat = HOST_DO_DU;
1523 if (inb(host->addr + TUL_XStatus) & XPEND) { /* DMA xfer pending, Send STOP */
1524 /* tell Hardware scsi xfer has been terminated */
1525 outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1526 /* wait until DMA xfer not pending */
1527 while (inb(host->addr + TUL_XStatus) & XPEND)
1528 cpu_relax();
1529 }
1530 } else {
1531 /*-------- DATA OUT -----------*/
1532 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1533 if (host->active_tc->js_period & TSC_WIDE_SCSI)
1534 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1535 else
1536 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1537 }
1538 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
1539 outb(TAX_X_ABT, host->addr + TUL_XCmd);
1540 /* wait Abort DMA xfer done */
1541 while ((inb(host->addr + TUL_Int) & XABT) == 0)
1542 cpu_relax();
1543 }
1544 if ((cnt == 1) && (host->phase == DATA_OUT)) {
1545 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1546 if (wait_tulip(host) == -1)
1547 return -1;
1548 cnt = 0;
1549 } else {
1550 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1551 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1552 }
1553 }
1554 if (cnt == 0) {
1555 scb->buflen = 0;
1556 return 6; /* After Data */
1557 }
1558 /* Update active data pointer */
1559 xcnt = (long) scb->buflen - cnt; /* xcnt== bytes already xferred */
1560 scb->buflen = (u32) cnt; /* cnt == bytes left to be xferred */
1561 if (scb->flags & SCF_SG) {
1562 struct sg_entry *sgp;
1563 unsigned long i;
1564
1565 sgp = &scb->sglist[scb->sgidx];
1566 for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1567 xcnt -= (long) sgp->len;
1568 if (xcnt < 0) { /* this sgp xfer half done */
1569 xcnt += (long) sgp->len; /* xcnt == bytes xferred in this sgp */
1570 sgp->data += (u32) xcnt; /* new ptr to be xfer */
1571 sgp->len -= (u32) xcnt; /* new len to be xfer */
1572 scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1573 /* new SG table ptr */
1574 scb->sglen = (u8) (scb->sgmax - i);
1575 /* new SG table len */
1576 scb->sgidx = (u16) i;
1577 /* for next disc and come in this loop */
1578 return 4; /* Go to state 4 */
1579 }
1580 /* else (xcnt >= 0 , i.e. this sgp already xferred */
1581 } /* for */
1582 return 6; /* Go to state 6 */
1583 } else {
1584 scb->bufptr += (u32) xcnt;
1585 }
1586 return 4; /* Go to state 4 */
1587 }
1588
1589 /**
1590 * initio_state_6 - SCSI state machine
1591 * @host: InitIO host we are controlling
1592 *
1593 * State after Data phase
1594 */
1595
initio_state_6(struct initio_host * host)1596 static int initio_state_6(struct initio_host * host)
1597 {
1598 struct scsi_ctrl_blk *scb = host->active;
1599
1600 #if DEBUG_STATE
1601 printk("-s6-");
1602 #endif
1603 for (;;) {
1604 switch (host->phase) {
1605 case STATUS_IN: /* Status phase */
1606 if ((initio_status_msg(host)) == -1)
1607 return -1;
1608 break;
1609
1610 case MSG_IN: /* Message in phase */
1611 scb->next_state = 6;
1612 if ((initio_msgin(host)) == -1)
1613 return -1;
1614 break;
1615
1616 case MSG_OUT: /* Message out phase */
1617 outb(NOP, host->addr + TUL_SFifo); /* msg nop */
1618 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1619 if (wait_tulip(host) == -1)
1620 return -1;
1621 break;
1622
1623 case DATA_IN: /* Data in phase */
1624 return initio_xpad_in(host);
1625
1626 case DATA_OUT: /* Data out phase */
1627 return initio_xpad_out(host);
1628
1629 default:
1630 return initio_bad_seq(host);
1631 }
1632 }
1633 }
1634
1635 /**
1636 * initio_state_7 - SCSI state machine
1637 * @host: InitIO host we are controlling
1638 *
1639 */
1640
initio_state_7(struct initio_host * host)1641 static int initio_state_7(struct initio_host * host)
1642 {
1643 int cnt, i;
1644
1645 #if DEBUG_STATE
1646 printk("-s7-");
1647 #endif
1648 /* flush SCSI FIFO */
1649 cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1650 if (cnt) {
1651 for (i = 0; i < cnt; i++)
1652 inb(host->addr + TUL_SFifo);
1653 }
1654 switch (host->phase) {
1655 case DATA_IN: /* Data in phase */
1656 case DATA_OUT: /* Data out phase */
1657 return initio_bad_seq(host);
1658 default:
1659 return 6; /* Go to state 6 */
1660 }
1661 }
1662
1663 /**
1664 * initio_xfer_data_in - Commence data input
1665 * @host: InitIO host in use
1666 *
1667 * Commence a block of data transfer. The transfer itself will
1668 * be managed by the controller and we will get a completion (or
1669 * failure) interrupt.
1670 */
initio_xfer_data_in(struct initio_host * host)1671 static int initio_xfer_data_in(struct initio_host * host)
1672 {
1673 struct scsi_ctrl_blk *scb = host->active;
1674
1675 if ((scb->flags & SCF_DIR) == SCF_DOUT)
1676 return 6; /* wrong direction */
1677
1678 outl(scb->buflen, host->addr + TUL_SCnt0);
1679 outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd); /* 7/25/95 */
1680
1681 if (scb->flags & SCF_SG) { /* S/G xfer */
1682 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1683 outl(scb->bufptr, host->addr + TUL_XAddH);
1684 outb(TAX_SG_IN, host->addr + TUL_XCmd);
1685 } else {
1686 outl(scb->buflen, host->addr + TUL_XCntH);
1687 outl(scb->bufptr, host->addr + TUL_XAddH);
1688 outb(TAX_X_IN, host->addr + TUL_XCmd);
1689 }
1690 scb->next_state = 0x5;
1691 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1692 }
1693
1694 /**
1695 * initio_xfer_data_out - Commence data output
1696 * @host: InitIO host in use
1697 *
1698 * Commence a block of data transfer. The transfer itself will
1699 * be managed by the controller and we will get a completion (or
1700 * failure) interrupt.
1701 */
1702
initio_xfer_data_out(struct initio_host * host)1703 static int initio_xfer_data_out(struct initio_host * host)
1704 {
1705 struct scsi_ctrl_blk *scb = host->active;
1706
1707 if ((scb->flags & SCF_DIR) == SCF_DIN)
1708 return 6; /* wrong direction */
1709
1710 outl(scb->buflen, host->addr + TUL_SCnt0);
1711 outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1712
1713 if (scb->flags & SCF_SG) { /* S/G xfer */
1714 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1715 outl(scb->bufptr, host->addr + TUL_XAddH);
1716 outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1717 } else {
1718 outl(scb->buflen, host->addr + TUL_XCntH);
1719 outl(scb->bufptr, host->addr + TUL_XAddH);
1720 outb(TAX_X_OUT, host->addr + TUL_XCmd);
1721 }
1722
1723 scb->next_state = 0x5;
1724 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1725 }
1726
initio_xpad_in(struct initio_host * host)1727 int initio_xpad_in(struct initio_host * host)
1728 {
1729 struct scsi_ctrl_blk *scb = host->active;
1730 struct target_control *active_tc = host->active_tc;
1731
1732 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1733 scb->hastat = HOST_DO_DU; /* over run */
1734 for (;;) {
1735 if (active_tc->js_period & TSC_WIDE_SCSI)
1736 outl(2, host->addr + TUL_SCnt0);
1737 else
1738 outl(1, host->addr + TUL_SCnt0);
1739
1740 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1741 if (wait_tulip(host) == -1)
1742 return -1;
1743 if (host->phase != DATA_IN) {
1744 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1745 return 6;
1746 }
1747 inb(host->addr + TUL_SFifo);
1748 }
1749 }
1750
initio_xpad_out(struct initio_host * host)1751 int initio_xpad_out(struct initio_host * host)
1752 {
1753 struct scsi_ctrl_blk *scb = host->active;
1754 struct target_control *active_tc = host->active_tc;
1755
1756 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1757 scb->hastat = HOST_DO_DU; /* over run */
1758 for (;;) {
1759 if (active_tc->js_period & TSC_WIDE_SCSI)
1760 outl(2, host->addr + TUL_SCnt0);
1761 else
1762 outl(1, host->addr + TUL_SCnt0);
1763
1764 outb(0, host->addr + TUL_SFifo);
1765 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1766 if ((wait_tulip(host)) == -1)
1767 return -1;
1768 if (host->phase != DATA_OUT) { /* Disable wide CPU to allow read 16 bits */
1769 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1770 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1771 return 6;
1772 }
1773 }
1774 }
1775
initio_status_msg(struct initio_host * host)1776 int initio_status_msg(struct initio_host * host)
1777 { /* status & MSG_IN */
1778 struct scsi_ctrl_blk *scb = host->active;
1779 u8 msg;
1780
1781 outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1782 if (wait_tulip(host) == -1)
1783 return -1;
1784
1785 /* get status */
1786 scb->tastat = inb(host->addr + TUL_SFifo);
1787
1788 if (host->phase == MSG_OUT) {
1789 if (host->jsstatus0 & TSS_PAR_ERROR)
1790 outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1791 else
1792 outb(NOP, host->addr + TUL_SFifo);
1793 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1794 return wait_tulip(host);
1795 }
1796 if (host->phase == MSG_IN) {
1797 msg = inb(host->addr + TUL_SFifo);
1798 if (host->jsstatus0 & TSS_PAR_ERROR) { /* Parity error */
1799 if ((initio_msgin_accept(host)) == -1)
1800 return -1;
1801 if (host->phase != MSG_OUT)
1802 return initio_bad_seq(host);
1803 outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1804 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1805 return wait_tulip(host);
1806 }
1807 if (msg == 0) { /* Command complete */
1808
1809 if ((scb->tastat & 0x18) == 0x10) /* No link support */
1810 return initio_bad_seq(host);
1811 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1812 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1813 return initio_wait_done_disc(host);
1814
1815 }
1816 if (msg == LINKED_CMD_COMPLETE ||
1817 msg == LINKED_FLG_CMD_COMPLETE) {
1818 if ((scb->tastat & 0x18) == 0x10)
1819 return initio_msgin_accept(host);
1820 }
1821 }
1822 return initio_bad_seq(host);
1823 }
1824
1825
1826 /* scsi bus free */
int_initio_busfree(struct initio_host * host)1827 int int_initio_busfree(struct initio_host * host)
1828 {
1829 struct scsi_ctrl_blk *scb = host->active;
1830
1831 if (scb != NULL) {
1832 if (scb->status & SCB_SELECT) { /* selection timeout */
1833 initio_unlink_pend_scb(host, scb);
1834 scb->hastat = HOST_SEL_TOUT;
1835 initio_append_done_scb(host, scb);
1836 } else { /* Unexpected bus free */
1837 initio_unlink_busy_scb(host, scb);
1838 scb->hastat = HOST_BUS_FREE;
1839 initio_append_done_scb(host, scb);
1840 }
1841 host->active = NULL;
1842 host->active_tc = NULL;
1843 }
1844 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
1845 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1846 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
1847 return -1;
1848 }
1849
1850
1851 /**
1852 * int_initio_scsi_rst - SCSI reset occurred
1853 * @host: Host seeing the reset
1854 *
1855 * A SCSI bus reset has occurred. Clean up any pending transfer
1856 * the hardware is doing by DMA and then abort all active and
1857 * disconnected commands. The mid layer should sort the rest out
1858 * for us
1859 */
1860
int_initio_scsi_rst(struct initio_host * host)1861 static int int_initio_scsi_rst(struct initio_host * host)
1862 {
1863 struct scsi_ctrl_blk *scb;
1864 int i;
1865
1866 /* if DMA xfer is pending, abort DMA xfer */
1867 if (inb(host->addr + TUL_XStatus) & 0x01) {
1868 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1869 /* wait Abort DMA xfer done */
1870 while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1871 cpu_relax();
1872 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1873 }
1874 /* Abort all active & disconnected scb */
1875 while ((scb = initio_pop_busy_scb(host)) != NULL) {
1876 scb->hastat = HOST_BAD_PHAS;
1877 initio_append_done_scb(host, scb);
1878 }
1879 host->active = NULL;
1880 host->active_tc = NULL;
1881
1882 /* clr sync nego. done flag */
1883 for (i = 0; i < host->max_tar; i++)
1884 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1885 return -1;
1886 }
1887
1888 /**
1889 * int_initio_resel - Reselection occurred
1890 * @host: InitIO host adapter
1891 *
1892 * A SCSI reselection event has been signalled and the interrupt
1893 * is now being processed. Work out which command block needs attention
1894 * and continue processing that command.
1895 */
1896
int_initio_resel(struct initio_host * host)1897 int int_initio_resel(struct initio_host * host)
1898 {
1899 struct scsi_ctrl_blk *scb;
1900 struct target_control *active_tc;
1901 u8 tag, msg = 0;
1902 u8 tar, lun;
1903
1904 if ((scb = host->active) != NULL) {
1905 /* FIXME: Why check and not just clear ? */
1906 if (scb->status & SCB_SELECT) /* if waiting for selection complete */
1907 scb->status &= ~SCB_SELECT;
1908 host->active = NULL;
1909 }
1910 /* --------- get target id---------------------- */
1911 tar = inb(host->addr + TUL_SBusId);
1912 /* ------ get LUN from Identify message----------- */
1913 lun = inb(host->addr + TUL_SIdent) & 0x0F;
1914 /* 07/22/98 from 0x1F -> 0x0F */
1915 active_tc = &host->targets[tar];
1916 host->active_tc = active_tc;
1917 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1918 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1919
1920 /* ------------- tag queueing ? ------------------- */
1921 if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1922 if ((initio_msgin_accept(host)) == -1)
1923 return -1;
1924 if (host->phase != MSG_IN)
1925 goto no_tag;
1926 outl(1, host->addr + TUL_SCnt0);
1927 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1928 if (wait_tulip(host) == -1)
1929 return -1;
1930 msg = inb(host->addr + TUL_SFifo); /* Read Tag Message */
1931
1932 if (msg < SIMPLE_QUEUE_TAG || msg > ORDERED_QUEUE_TAG)
1933 /* 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
int_initio_bad_seq(struct initio_host * host)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
initio_msgout_abort_targ(struct initio_host * host)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(ABORT_TASK_SET, 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
initio_msgout_abort_tag(struct initio_host * host)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(ABORT_TASK, 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 */
initio_msgin(struct initio_host * host)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 DISCONNECT: /* Disconnect msg */
2063 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2064 return initio_wait_disc(host);
2065 case SAVE_POINTERS:
2066 case RESTORE_POINTERS:
2067 case NOP:
2068 initio_msgin_accept(host);
2069 break;
2070 case MESSAGE_REJECT: /* 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 EXTENDED_MESSAGE: /* extended msg */
2080 initio_msgin_extend(host);
2081 break;
2082 case IGNORE_WIDE_RESIDUE:
2083 initio_msgin_accept(host);
2084 break;
2085 case COMMAND_COMPLETE:
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
initio_msgout_reject(struct initio_host * host)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(MESSAGE_REJECT, 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
initio_msgout_ide(struct initio_host * host)2114 static int initio_msgout_ide(struct initio_host * host)
2115 {
2116 outb(INITIATOR_ERROR, host->addr + TUL_SFifo); /* Initiator Detected Error */
2117 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2118 return wait_tulip(host);
2119 }
2120
initio_msgin_extend(struct initio_host * host)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(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2171 outb(3, host->addr + TUL_SFifo);
2172 outb(EXTENDED_SDTR, 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(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2203 outb(2, host->addr + TUL_SFifo);
2204 outb(EXTENDED_WDTR, 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
initio_msgin_sync(struct initio_host * host)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
wdtr_done(struct initio_host * host)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
initio_sync_done(struct initio_host * host)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
initio_post_scsi_rst(struct initio_host * host)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
initio_select_atn_stop(struct initio_host * host,struct scsi_ctrl_blk * scb)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
initio_select_atn(struct initio_host * host,struct scsi_ctrl_blk * scb)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
initio_select_atn3(struct initio_host * host,struct scsi_ctrl_blk * scb)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 */
initio_bus_device_reset(struct initio_host * host)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(TARGET_RESET, host->addr + TUL_SFifo);
2395 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2396 return initio_wait_disc(host);
2397
2398 }
2399
initio_msgin_accept(struct initio_host * host)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
wait_tulip(struct initio_host * host)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
initio_wait_disc(struct initio_host * host)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
initio_wait_done_disc(struct initio_host * host)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
i91u_intr(int irqno,void * dev_id)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
initio_build_scb(struct initio_host * host,struct scsi_ctrl_blk * cblk,struct scsi_cmnd * cmnd)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 initio_priv(cmnd)->sense_dma_addr = 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 initio_priv(cmnd)->sglist_dma_addr = 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_lck - Queue a new command if possible
2604 * @cmd: SCSI command block from the mid layer
2605 *
2606 * Attempts to queue a new command with the host adapter. Will return
2607 * zero if successful or indicate a host busy condition if not (which
2608 * will cause the mid layer to call us again later with the command)
2609 */
i91u_queuecommand_lck(struct scsi_cmnd * cmd)2610 static int i91u_queuecommand_lck(struct scsi_cmnd *cmd)
2611 {
2612 struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2613 struct scsi_ctrl_blk *cmnd;
2614
2615 cmnd = initio_alloc_scb(host);
2616 if (!cmnd)
2617 return SCSI_MLQUEUE_HOST_BUSY;
2618
2619 initio_build_scb(host, cmnd, cmd);
2620 initio_exec_scb(host, cmnd);
2621 return 0;
2622 }
2623
DEF_SCSI_QCMD(i91u_queuecommand)2624 static DEF_SCSI_QCMD(i91u_queuecommand)
2625
2626 /**
2627 * i91u_bus_reset - reset the SCSI bus
2628 * @cmnd: Command block we want to trigger the reset for
2629 *
2630 * Initiate a SCSI bus reset sequence
2631 */
2632
2633 static int i91u_bus_reset(struct scsi_cmnd * cmnd)
2634 {
2635 struct initio_host *host;
2636
2637 host = (struct initio_host *) cmnd->device->host->hostdata;
2638
2639 spin_lock_irq(cmnd->device->host->host_lock);
2640 initio_reset_scsi(host, 0);
2641 spin_unlock_irq(cmnd->device->host->host_lock);
2642
2643 return SUCCESS;
2644 }
2645
2646 /**
2647 * i91u_biosparam - return the "logical geometry
2648 * @sdev: SCSI device
2649 * @dev: Matching block device
2650 * @capacity: Sector size of drive
2651 * @info_array: Return space for BIOS geometry
2652 *
2653 * Map the device geometry in a manner compatible with the host
2654 * controller BIOS behaviour.
2655 *
2656 * FIXME: limited to 2^32 sector devices.
2657 */
2658
i91u_biosparam(struct scsi_device * sdev,struct block_device * dev,sector_t capacity,int * info_array)2659 static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2660 sector_t capacity, int *info_array)
2661 {
2662 struct initio_host *host; /* Point to Host adapter control block */
2663 struct target_control *tc;
2664
2665 host = (struct initio_host *) sdev->host->hostdata;
2666 tc = &host->targets[sdev->id];
2667
2668 if (tc->heads) {
2669 info_array[0] = tc->heads;
2670 info_array[1] = tc->sectors;
2671 info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
2672 } else {
2673 if (tc->drv_flags & TCF_DRV_255_63) {
2674 info_array[0] = 255;
2675 info_array[1] = 63;
2676 info_array[2] = (unsigned long)capacity / 255 / 63;
2677 } else {
2678 info_array[0] = 64;
2679 info_array[1] = 32;
2680 info_array[2] = (unsigned long)capacity >> 11;
2681 }
2682 }
2683
2684 #if defined(DEBUG_BIOSPARAM)
2685 if (i91u_debug & debug_biosparam) {
2686 printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2687 info_array[0], info_array[1], info_array[2]);
2688 printk("WARNING: check, if the bios geometry is correct.\n");
2689 }
2690 #endif
2691
2692 return 0;
2693 }
2694
2695 /**
2696 * i91u_unmap_scb - Unmap a command
2697 * @pci_dev: PCI device the command is for
2698 * @cmnd: The command itself
2699 *
2700 * Unmap any PCI mapping/IOMMU resources allocated when the command
2701 * was mapped originally as part of initio_build_scb
2702 */
2703
i91u_unmap_scb(struct pci_dev * pci_dev,struct scsi_cmnd * cmnd)2704 static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
2705 {
2706 /* auto sense buffer */
2707 if (initio_priv(cmnd)->sense_dma_addr) {
2708 dma_unmap_single(&pci_dev->dev,
2709 initio_priv(cmnd)->sense_dma_addr,
2710 SENSE_SIZE, DMA_FROM_DEVICE);
2711 initio_priv(cmnd)->sense_dma_addr = 0;
2712 }
2713
2714 /* request buffer */
2715 if (scsi_sg_count(cmnd)) {
2716 dma_unmap_single(&pci_dev->dev,
2717 initio_priv(cmnd)->sglist_dma_addr,
2718 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2719 DMA_BIDIRECTIONAL);
2720
2721 scsi_dma_unmap(cmnd);
2722 }
2723 }
2724
2725 /*
2726 * i91uSCBPost - SCSI callback
2727 *
2728 * This is callback routine be called when tulip finish one
2729 * SCSI command.
2730 */
2731
i91uSCBPost(u8 * host_mem,u8 * cblk_mem)2732 static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2733 {
2734 struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2735 struct initio_host *host;
2736 struct scsi_ctrl_blk *cblk;
2737
2738 host = (struct initio_host *) host_mem;
2739 cblk = (struct scsi_ctrl_blk *) cblk_mem;
2740 if ((cmnd = cblk->srb) == NULL) {
2741 printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2742 WARN_ON(1);
2743 initio_release_scb(host, cblk); /* Release SCB for current channel */
2744 return;
2745 }
2746
2747 /*
2748 * Remap the firmware error status into a mid layer one
2749 */
2750 switch (cblk->hastat) {
2751 case 0x0:
2752 case 0xa: /* Linked command complete without error and linked normally */
2753 case 0xb: /* Linked command complete without error interrupt generated */
2754 cblk->hastat = 0;
2755 break;
2756
2757 case 0x11: /* Selection time out-The initiator selection or target
2758 reselection was not complete within the SCSI Time out period */
2759 cblk->hastat = DID_TIME_OUT;
2760 break;
2761
2762 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
2763 phase sequence was requested by the target. The host adapter
2764 will generate a SCSI Reset Condition, notifying the host with
2765 a SCRD interrupt */
2766 cblk->hastat = DID_RESET;
2767 break;
2768
2769 case 0x1a: /* SCB Aborted. 07/21/98 */
2770 cblk->hastat = DID_ABORT;
2771 break;
2772
2773 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
2774 than was allocated by the Data Length field or the sum of the
2775 Scatter / Gather Data Length fields. */
2776 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2777 case 0x16: /* Invalid SCB Operation Code. */
2778
2779 default:
2780 printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2781 cblk->hastat = DID_ERROR; /* Couldn't find any better */
2782 break;
2783 }
2784
2785 cmnd->result = cblk->tastat | (cblk->hastat << 16);
2786 i91u_unmap_scb(host->pci_dev, cmnd);
2787 scsi_done(cmnd); /* Notify system DONE */
2788 initio_release_scb(host, cblk); /* Release SCB for current channel */
2789 }
2790
2791 static const struct scsi_host_template initio_template = {
2792 .proc_name = "INI9100U",
2793 .name = "Initio INI-9X00U/UW SCSI device driver",
2794 .queuecommand = i91u_queuecommand,
2795 .eh_bus_reset_handler = i91u_bus_reset,
2796 .bios_param = i91u_biosparam,
2797 .can_queue = MAX_TARGETS * i91u_MAXQUEUE,
2798 .this_id = 1,
2799 .sg_tablesize = SG_ALL,
2800 .cmd_size = sizeof(struct initio_cmd_priv),
2801 };
2802
initio_probe_one(struct pci_dev * pdev,const struct pci_device_id * id)2803 static int initio_probe_one(struct pci_dev *pdev,
2804 const struct pci_device_id *id)
2805 {
2806 struct Scsi_Host *shost;
2807 struct initio_host *host;
2808 u32 reg;
2809 u16 bios_seg;
2810 struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2811 int num_scb, i, error;
2812
2813 error = pci_enable_device(pdev);
2814 if (error)
2815 return error;
2816
2817 pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2818 bios_seg = (u16) (reg & 0xFF);
2819 if (((reg & 0xFF00) >> 8) == 0xFF)
2820 reg = 0;
2821 bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2822
2823 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
2824 printk(KERN_WARNING "i91u: Could not set 32 bit DMA mask\n");
2825 error = -ENODEV;
2826 goto out_disable_device;
2827 }
2828 shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2829 if (!shost) {
2830 printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2831 error = -ENOMEM;
2832 goto out_disable_device;
2833 }
2834 host = (struct initio_host *)shost->hostdata;
2835 memset(host, 0, sizeof(struct initio_host));
2836 host->addr = pci_resource_start(pdev, 0);
2837 host->bios_addr = bios_seg;
2838
2839 if (!request_region(host->addr, 256, "i91u")) {
2840 printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2841 error = -ENODEV;
2842 goto out_host_put;
2843 }
2844
2845 if (initio_tag_enable) /* 1.01i */
2846 num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2847 else
2848 num_scb = MAX_TARGETS + 3; /* 1-tape, 1-CD_ROM, 1- extra */
2849
2850 for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2851 i = num_scb * sizeof(struct scsi_ctrl_blk);
2852 scb = kzalloc(i, GFP_KERNEL);
2853 if (scb)
2854 break;
2855 }
2856
2857 if (!scb) {
2858 printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2859 error = -ENOMEM;
2860 goto out_release_region;
2861 }
2862
2863 host->pci_dev = pdev;
2864
2865 host->semaph = 1;
2866 spin_lock_init(&host->semaph_lock);
2867 host->num_scbs = num_scb;
2868 host->scb = scb;
2869 host->next_pending = scb;
2870 host->next_avail = scb;
2871 for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2872 tmp->tagid = i;
2873 if (i != 0)
2874 prev->next = tmp;
2875 prev = tmp;
2876 }
2877 prev->next = NULL;
2878 host->scb_end = tmp;
2879 host->first_avail = scb;
2880 host->last_avail = prev;
2881 spin_lock_init(&host->avail_lock);
2882
2883 initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
2884
2885 host->jsstatus0 = 0;
2886
2887 shost->io_port = host->addr;
2888 shost->n_io_port = 0xff;
2889 shost->can_queue = num_scb; /* 03/05/98 */
2890 shost->unique_id = host->addr;
2891 shost->max_id = host->max_tar;
2892 shost->max_lun = 32; /* 10/21/97 */
2893 shost->irq = pdev->irq;
2894 shost->this_id = host->scsi_id; /* Assign HCS index */
2895 shost->base = host->addr;
2896 shost->sg_tablesize = TOTAL_SG_ENTRY;
2897
2898 error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
2899 if (error < 0) {
2900 printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2901 goto out_free_scbs;
2902 }
2903
2904 pci_set_drvdata(pdev, shost);
2905
2906 error = scsi_add_host(shost, &pdev->dev);
2907 if (error)
2908 goto out_free_irq;
2909 scsi_scan_host(shost);
2910 return 0;
2911 out_free_irq:
2912 free_irq(pdev->irq, shost);
2913 out_free_scbs:
2914 kfree(host->scb);
2915 out_release_region:
2916 release_region(host->addr, 256);
2917 out_host_put:
2918 scsi_host_put(shost);
2919 out_disable_device:
2920 pci_disable_device(pdev);
2921 return error;
2922 }
2923
2924 /**
2925 * initio_remove_one - control shutdown
2926 * @pdev: PCI device being released
2927 *
2928 * Release the resources assigned to this adapter after it has
2929 * finished being used.
2930 */
2931
initio_remove_one(struct pci_dev * pdev)2932 static void initio_remove_one(struct pci_dev *pdev)
2933 {
2934 struct Scsi_Host *host = pci_get_drvdata(pdev);
2935 struct initio_host *s = (struct initio_host *)host->hostdata;
2936 scsi_remove_host(host);
2937 free_irq(pdev->irq, host);
2938 release_region(s->addr, 256);
2939 scsi_host_put(host);
2940 pci_disable_device(pdev);
2941 }
2942
2943 MODULE_LICENSE("GPL");
2944
2945 static struct pci_device_id initio_pci_tbl[] = {
2946 {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2947 {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2948 {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2949 {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2950 {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2951 {0,}
2952 };
2953 MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2954
2955 static struct pci_driver initio_pci_driver = {
2956 .name = "initio",
2957 .id_table = initio_pci_tbl,
2958 .probe = initio_probe_one,
2959 .remove = initio_remove_one,
2960 };
2961 module_pci_driver(initio_pci_driver);
2962
2963 MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
2964 MODULE_AUTHOR("Initio Corporation");
2965 MODULE_LICENSE("GPL");
2966