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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
100static unsigned int i91u_debug = DEBUG_DEFAULT;
101#endif
102
103static int initio_tag_enable = 1;
104
105#ifdef DEBUG_i91u
106static int setup_debug = 0;
107#endif
108
109static 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 ---*/
117static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
118static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
119
120static int tulip_main(struct initio_host * host);
121
122static int initio_next_state(struct initio_host * host);
123static int initio_state_1(struct initio_host * host);
124static int initio_state_2(struct initio_host * host);
125static int initio_state_3(struct initio_host * host);
126static int initio_state_4(struct initio_host * host);
127static int initio_state_5(struct initio_host * host);
128static int initio_state_6(struct initio_host * host);
129static int initio_state_7(struct initio_host * host);
130static int initio_xfer_data_in(struct initio_host * host);
131static int initio_xfer_data_out(struct initio_host * host);
132static int initio_xpad_in(struct initio_host * host);
133static int initio_xpad_out(struct initio_host * host);
134static int initio_status_msg(struct initio_host * host);
135
136static int initio_msgin(struct initio_host * host);
137static int initio_msgin_sync(struct initio_host * host);
138static int initio_msgin_accept(struct initio_host * host);
139static int initio_msgout_reject(struct initio_host * host);
140static int initio_msgin_extend(struct initio_host * host);
141
142static int initio_msgout_ide(struct initio_host * host);
143static int initio_msgout_abort_targ(struct initio_host * host);
144static int initio_msgout_abort_tag(struct initio_host * host);
145
146static int initio_bus_device_reset(struct initio_host * host);
147static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
148static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
149static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
150static int int_initio_busfree(struct initio_host * host);
151static int int_initio_scsi_rst(struct initio_host * host);
152static int int_initio_bad_seq(struct initio_host * host);
153static int int_initio_resel(struct initio_host * host);
154static int initio_sync_done(struct initio_host * host);
155static int wdtr_done(struct initio_host * host);
156static int wait_tulip(struct initio_host * host);
157static int initio_wait_done_disc(struct initio_host * host);
158static int initio_wait_disc(struct initio_host * host);
159static void tulip_scsi(struct initio_host * host);
160static int initio_post_scsi_rst(struct initio_host * host);
161
162static void initio_se2_ew_en(unsigned long base);
163static void initio_se2_ew_ds(unsigned long base);
164static int initio_se2_rd_all(unsigned long base);
165static void initio_se2_update_all(unsigned long base); /* setup default pattern */
166static void initio_read_eeprom(unsigned long base);
167
168/* ---- INTERNAL VARIABLES ---- */
169
170static NVRAM i91unvram;
171static NVRAM *i91unvramp;
172
173static 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
213static 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
226static 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
276static 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 */
308void 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 */
322void 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 */
337static 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 */
372static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
373{
374 u8 instr;
375 int i;
376
377 instr = (u8) (addr | 0x40);
378 initio_se2_instr(base, instr); /* WRITE INSTR */
379 for (i = 15; i >= 0; i--) {
380 if (val & 0x8000)
381 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* -CLK+dataBit 1 */
382 else
383 outb(SE2CS, base + TUL_NVRAM); /* -CLK+dataBit 0 */
384 udelay(30);
385 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
386 udelay(30);
387 val <<= 1;
388 }
389 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
390 udelay(30);
391 outb(0, base + TUL_NVRAM); /* -CS */
392 udelay(30);
393
394 outb(SE2CS, base + TUL_NVRAM); /* +CS */
395 udelay(30);
396
397 for (;;) {
398 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
399 udelay(30);
400 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
401 udelay(30);
402 if (inb(base + TUL_NVRAM) & SE2DI)
403 break; /* write complete */
404 }
405 outb(0, base + TUL_NVRAM); /* -CS */
406}
407
408/**
409 * initio_se2_rd_all - read hostadapter NV configuration
410 * @base: Base address of InitIO controller
411 *
412 * Reads the E2PROM data into main memory. Ensures that the checksum
413 * and header marker are valid. Returns 1 on success -1 on error.
414 */
415
416static int initio_se2_rd_all(unsigned long base)
417{
418 int i;
419 u16 chksum = 0;
420 u16 *np;
421
422 i91unvramp = &i91unvram;
423 np = (u16 *) i91unvramp;
424 for (i = 0; i < 32; i++)
425 *np++ = initio_se2_rd(base, i);
426
427 /* Is signature "ini" ok ? */
428 if (i91unvramp->NVM_Signature != INI_SIGNATURE)
429 return -1;
430 /* Is ckecksum ok ? */
431 np = (u16 *) i91unvramp;
432 for (i = 0; i < 31; i++)
433 chksum += *np++;
434 if (i91unvramp->NVM_CheckSum != chksum)
435 return -1;
436 return 1;
437}
438
439/**
440 * initio_se2_update_all - Update E2PROM
441 * @base: Base of InitIO controller
442 *
443 * Update the E2PROM by wrting any changes into the E2PROM
444 * chip, rewriting the checksum.
445 */
446static void initio_se2_update_all(unsigned long base)
447{ /* setup default pattern */
448 int i;
449 u16 chksum = 0;
450 u16 *np, *np1;
451
452 i91unvramp = &i91unvram;
453 /* Calculate checksum first */
454 np = (u16 *) i91udftNvRam;
455 for (i = 0; i < 31; i++)
456 chksum += *np++;
457 *np = chksum;
458 initio_se2_ew_en(base); /* Enable write */
459
460 np = (u16 *) i91udftNvRam;
461 np1 = (u16 *) i91unvramp;
462 for (i = 0; i < 32; i++, np++, np1++) {
463 if (*np != *np1)
464 initio_se2_wr(base, i, *np);
465 }
466 initio_se2_ew_ds(base); /* Disable write */
467}
468
469/**
470 * initio_read_eeprom - Retrieve configuration
471 * @base: Base of InitIO Host Adapter
472 *
473 * Retrieve the host adapter configuration data from E2Prom. If the
474 * data is invalid then the defaults are used and are also restored
475 * into the E2PROM. This forms the access point for the SCSI driver
476 * into the E2PROM layer, the other functions for the E2PROM are all
477 * internal use.
478 *
479 * Must be called single threaded, uses a shared global area.
480 */
481
482static void initio_read_eeprom(unsigned long base)
483{
484 u8 gctrl;
485
486 i91unvramp = &i91unvram;
487 /* Enable EEProm programming */
488 gctrl = inb(base + TUL_GCTRL);
489 outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
490 if (initio_se2_rd_all(base) != 1) {
491 initio_se2_update_all(base); /* setup default pattern */
492 initio_se2_rd_all(base); /* load again */
493 }
494 /* Disable EEProm programming */
495 gctrl = inb(base + TUL_GCTRL);
496 outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
497}
498
499/**
500 * initio_stop_bm - stop bus master
501 * @host: InitIO we are stopping
502 *
503 * Stop any pending DMA operation, aborting the DMA if necessary
504 */
505
506static void initio_stop_bm(struct initio_host * host)
507{
508
509 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
510 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
511 /* wait Abort DMA xfer done */
512 while ((inb(host->addr + TUL_Int) & XABT) == 0)
513 cpu_relax();
514 }
515 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
516}
517
518/**
519 * initio_reset_scsi - Reset SCSI host controller
520 * @host: InitIO host to reset
521 * @seconds: Recovery time
522 *
523 * Perform a full reset of the SCSI subsystem.
524 */
525
526static int initio_reset_scsi(struct initio_host * host, int seconds)
527{
528 outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
529
530 while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
531 cpu_relax();
532
533 /* reset tulip chip */
534 outb(0, host->addr + TUL_SSignal);
535
536 /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
537 /* SONY 5200 tape drive won't work if only stall for 1 sec */
538 /* FIXME: this is a very long busy wait right now */
539 initio_do_pause(seconds * HZ);
540
541 inb(host->addr + TUL_SInt);
542 return SCSI_RESET_SUCCESS;
543}
544
545/**
546 * initio_init - set up an InitIO host adapter
547 * @host: InitIO host adapter
548 * @bios_addr: BIOS address
549 *
550 * Set up the host adapter and devices according to the configuration
551 * retrieved from the E2PROM.
552 *
553 * Locking: Calls E2PROM layer code which is not re-enterable so must
554 * run single threaded for now.
555 */
556
557static void initio_init(struct initio_host * host, u8 *bios_addr)
558{
559 int i;
560 u8 *flags;
561 u8 *heads;
562
563 /* Get E2Prom configuration */
564 initio_read_eeprom(host->addr);
565 if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
566 host->max_tar = 8;
567 else
568 host->max_tar = 16;
569
570 host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
571
572 host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
573 host->idmask = ~(1 << host->scsi_id);
574
575#ifdef CHK_PARITY
576 /* Enable parity error response */
577 outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
578#endif
579
580 /* Mask all the interrupt */
581 outb(0x1F, host->addr + TUL_Mask);
582
583 initio_stop_bm(host);
584 /* --- Initialize the tulip --- */
585 outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
586
587 /* program HBA's SCSI ID */
588 outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
589
590 /* Enable Initiator Mode ,phase latch,alternate sync period mode,
591 disable SCSI reset */
592 if (host->config & HCC_EN_PAR)
593 host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
594 else
595 host->sconf1 = (TSC_INITDEFAULT);
596 outb(host->sconf1, host->addr + TUL_SConfig);
597
598 /* Enable HW reselect */
599 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
600
601 outb(0, host->addr + TUL_SPeriod);
602
603 /* selection time out = 250 ms */
604 outb(153, host->addr + TUL_STimeOut);
605
606 /* Enable SCSI terminator */
607 outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
608 host->addr + TUL_XCtrl);
609 outb(((host->config & HCC_AUTO_TERM) >> 4) |
610 (inb(host->addr + TUL_GCTRL1) & 0xFE),
611 host->addr + TUL_GCTRL1);
612
613 for (i = 0,
614 flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
615 heads = bios_addr + 0x180;
616 i < host->max_tar;
617 i++, flags++) {
618 host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
619 if (host->targets[i].flags & TCF_EN_255)
620 host->targets[i].drv_flags = TCF_DRV_255_63;
621 else
622 host->targets[i].drv_flags = 0;
623 host->targets[i].js_period = 0;
624 host->targets[i].sconfig0 = host->sconf1;
625 host->targets[i].heads = *heads++;
626 if (host->targets[i].heads == 255)
627 host->targets[i].drv_flags = TCF_DRV_255_63;
628 else
629 host->targets[i].drv_flags = 0;
630 host->targets[i].sectors = *heads++;
631 host->targets[i].flags &= ~TCF_BUSY;
632 host->act_tags[i] = 0;
633 host->max_tags[i] = 0xFF;
634 } /* for */
635 printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
636 host->addr, host->pci_dev->irq,
637 host->bios_addr, host->scsi_id);
638 /* Reset SCSI Bus */
639 if (host->config & HCC_SCSI_RESET) {
640 printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
641 initio_reset_scsi(host, 10);
642 }
643 outb(0x17, host->addr + TUL_SCFG1);
644 outb(0xE9, host->addr + TUL_SIntEnable);
645}
646
647/**
648 * initio_alloc_scb - Allocate an SCB
649 * @host: InitIO host we are allocating for
650 *
651 * Walk the SCB list for the controller and allocate a free SCB if
652 * one exists.
653 */
654static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
655{
656 struct scsi_ctrl_blk *scb;
657 unsigned long flags;
658
659 spin_lock_irqsave(&host->avail_lock, flags);
660 if ((scb = host->first_avail) != NULL) {
661#if DEBUG_QUEUE
662 printk("find scb at %p\n", scb);
663#endif
664 if ((host->first_avail = scb->next) == NULL)
665 host->last_avail = NULL;
666 scb->next = NULL;
667 scb->status = SCB_RENT;
668 }
669 spin_unlock_irqrestore(&host->avail_lock, flags);
670 return scb;
671}
672
673/**
674 * initio_release_scb - Release an SCB
675 * @host: InitIO host that owns the SCB
676 * @cmnd: SCB command block being returned
677 *
678 * Return an allocated SCB to the host free list
679 */
680
681static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
682{
683 unsigned long flags;
684
685#if DEBUG_QUEUE
686 printk("Release SCB %p; ", cmnd);
687#endif
688 spin_lock_irqsave(&(host->avail_lock), flags);
689 cmnd->srb = NULL;
690 cmnd->status = 0;
691 cmnd->next = NULL;
692 if (host->last_avail != NULL) {
693 host->last_avail->next = cmnd;
694 host->last_avail = cmnd;
695 } else {
696 host->first_avail = cmnd;
697 host->last_avail = cmnd;
698 }
699 spin_unlock_irqrestore(&(host->avail_lock), flags);
700}
701
702/***************************************************************************/
703static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
704{
705
706#if DEBUG_QUEUE
707 printk("Append pend SCB %p; ", scbp);
708#endif
709 scbp->status = SCB_PEND;
710 scbp->next = NULL;
711 if (host->last_pending != NULL) {
712 host->last_pending->next = scbp;
713 host->last_pending = scbp;
714 } else {
715 host->first_pending = scbp;
716 host->last_pending = scbp;
717 }
718}
719
720/***************************************************************************/
721static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
722{
723
724#if DEBUG_QUEUE
725 printk("Push pend SCB %p; ", scbp);
726#endif
727 scbp->status = SCB_PEND;
728 if ((scbp->next = host->first_pending) != NULL) {
729 host->first_pending = scbp;
730 } else {
731 host->first_pending = scbp;
732 host->last_pending = scbp;
733 }
734}
735
736static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
737{
738 struct scsi_ctrl_blk *first;
739
740
741 first = host->first_pending;
742 while (first != NULL) {
743 if (first->opcode != ExecSCSI)
744 return first;
745 if (first->tagmsg == 0) {
746 if ((host->act_tags[first->target] == 0) &&
747 !(host->targets[first->target].flags & TCF_BUSY))
748 return first;
749 } else {
750 if ((host->act_tags[first->target] >=
751 host->max_tags[first->target]) |
752 (host->targets[first->target].flags & TCF_BUSY)) {
753 first = first->next;
754 continue;
755 }
756 return first;
757 }
758 first = first->next;
759 }
760 return first;
761}
762
763static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
764{
765 struct scsi_ctrl_blk *tmp, *prev;
766
767#if DEBUG_QUEUE
768 printk("unlink pend SCB %p; ", scb);
769#endif
770
771 prev = tmp = host->first_pending;
772 while (tmp != NULL) {
773 if (scb == tmp) { /* Unlink this SCB */
774 if (tmp == host->first_pending) {
775 if ((host->first_pending = tmp->next) == NULL)
776 host->last_pending = NULL;
777 } else {
778 prev->next = tmp->next;
779 if (tmp == host->last_pending)
780 host->last_pending = prev;
781 }
782 tmp->next = NULL;
783 break;
784 }
785 prev = tmp;
786 tmp = tmp->next;
787 }
788}
789
790static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
791{
792
793#if DEBUG_QUEUE
794 printk("append busy SCB %p; ", scbp);
795#endif
796 if (scbp->tagmsg)
797 host->act_tags[scbp->target]++;
798 else
799 host->targets[scbp->target].flags |= TCF_BUSY;
800 scbp->status = SCB_BUSY;
801 scbp->next = NULL;
802 if (host->last_busy != NULL) {
803 host->last_busy->next = scbp;
804 host->last_busy = scbp;
805 } else {
806 host->first_busy = scbp;
807 host->last_busy = scbp;
808 }
809}
810
811/***************************************************************************/
812static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
813{
814 struct scsi_ctrl_blk *tmp;
815
816
817 if ((tmp = host->first_busy) != NULL) {
818 if ((host->first_busy = tmp->next) == NULL)
819 host->last_busy = NULL;
820 tmp->next = NULL;
821 if (tmp->tagmsg)
822 host->act_tags[tmp->target]--;
823 else
824 host->targets[tmp->target].flags &= ~TCF_BUSY;
825 }
826#if DEBUG_QUEUE
827 printk("Pop busy SCB %p; ", tmp);
828#endif
829 return tmp;
830}
831
832/***************************************************************************/
833static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
834{
835 struct scsi_ctrl_blk *tmp, *prev;
836
837#if DEBUG_QUEUE
838 printk("unlink busy SCB %p; ", scb);
839#endif
840
841 prev = tmp = host->first_busy;
842 while (tmp != NULL) {
843 if (scb == tmp) { /* Unlink this SCB */
844 if (tmp == host->first_busy) {
845 if ((host->first_busy = tmp->next) == NULL)
846 host->last_busy = NULL;
847 } else {
848 prev->next = tmp->next;
849 if (tmp == host->last_busy)
850 host->last_busy = prev;
851 }
852 tmp->next = NULL;
853 if (tmp->tagmsg)
854 host->act_tags[tmp->target]--;
855 else
856 host->targets[tmp->target].flags &= ~TCF_BUSY;
857 break;
858 }
859 prev = tmp;
860 tmp = tmp->next;
861 }
862 return;
863}
864
865struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
866{
867 struct scsi_ctrl_blk *tmp;
868 u16 scbp_tarlun;
869
870
871 tmp = host->first_busy;
872 while (tmp != NULL) {
873 scbp_tarlun = (tmp->lun << 8) | (tmp->target);
874 if (scbp_tarlun == tarlun) { /* Unlink this SCB */
875 break;
876 }
877 tmp = tmp->next;
878 }
879#if DEBUG_QUEUE
880 printk("find busy SCB %p; ", tmp);
881#endif
882 return tmp;
883}
884
885static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
886{
887#if DEBUG_QUEUE
888 printk("append done SCB %p; ", scbp);
889#endif
890
891 scbp->status = SCB_DONE;
892 scbp->next = NULL;
893 if (host->last_done != NULL) {
894 host->last_done->next = scbp;
895 host->last_done = scbp;
896 } else {
897 host->first_done = scbp;
898 host->last_done = scbp;
899 }
900}
901
902struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
903{
904 struct scsi_ctrl_blk *tmp;
905
906 if ((tmp = host->first_done) != NULL) {
907 if ((host->first_done = tmp->next) == NULL)
908 host->last_done = NULL;
909 tmp->next = NULL;
910 }
911#if DEBUG_QUEUE
912 printk("find done SCB %p; ",tmp);
913#endif
914 return tmp;
915}
916
917static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
918{
919 unsigned long flags;
920 struct scsi_ctrl_blk *tmp, *prev;
921
922 spin_lock_irqsave(&host->semaph_lock, flags);
923
924 if ((host->semaph == 0) && (host->active == NULL)) {
925 /* disable Jasmin SCSI Int */
926 outb(0x1F, host->addr + TUL_Mask);
927 spin_unlock_irqrestore(&host->semaph_lock, flags);
928 /* FIXME: synchronize_irq needed ? */
929 tulip_main(host);
930 spin_lock_irqsave(&host->semaph_lock, flags);
931 host->semaph = 1;
932 outb(0x0F, host->addr + TUL_Mask);
933 spin_unlock_irqrestore(&host->semaph_lock, flags);
934 return SCSI_ABORT_SNOOZE;
935 }
936 prev = tmp = host->first_pending; /* Check Pend queue */
937 while (tmp != NULL) {
938 /* 07/27/98 */
939 if (tmp->srb == srbp) {
940 if (tmp == host->active) {
941 spin_unlock_irqrestore(&host->semaph_lock, flags);
942 return SCSI_ABORT_BUSY;
943 } else if (tmp == host->first_pending) {
944 if ((host->first_pending = tmp->next) == NULL)
945 host->last_pending = NULL;
946 } else {
947 prev->next = tmp->next;
948 if (tmp == host->last_pending)
949 host->last_pending = prev;
950 }
951 tmp->hastat = HOST_ABORTED;
952 tmp->flags |= SCF_DONE;
953 if (tmp->flags & SCF_POST)
954 (*tmp->post) ((u8 *) host, (u8 *) tmp);
955 spin_unlock_irqrestore(&host->semaph_lock, flags);
956 return SCSI_ABORT_SUCCESS;
957 }
958 prev = tmp;
959 tmp = tmp->next;
960 }
961
962 prev = tmp = host->first_busy; /* Check Busy queue */
963 while (tmp != NULL) {
964 if (tmp->srb == srbp) {
965 if (tmp == host->active) {
966 spin_unlock_irqrestore(&host->semaph_lock, flags);
967 return SCSI_ABORT_BUSY;
968 } else if (tmp->tagmsg == 0) {
969 spin_unlock_irqrestore(&host->semaph_lock, flags);
970 return SCSI_ABORT_BUSY;
971 } else {
972 host->act_tags[tmp->target]--;
973 if (tmp == host->first_busy) {
974 if ((host->first_busy = tmp->next) == NULL)
975 host->last_busy = NULL;
976 } else {
977 prev->next = tmp->next;
978 if (tmp == host->last_busy)
979 host->last_busy = prev;
980 }
981 tmp->next = NULL;
982
983
984 tmp->hastat = HOST_ABORTED;
985 tmp->flags |= SCF_DONE;
986 if (tmp->flags & SCF_POST)
987 (*tmp->post) ((u8 *) host, (u8 *) tmp);
988 spin_unlock_irqrestore(&host->semaph_lock, flags);
989 return SCSI_ABORT_SUCCESS;
990 }
991 }
992 prev = tmp;
993 tmp = tmp->next;
994 }
995 spin_unlock_irqrestore(&host->semaph_lock, flags);
996 return SCSI_ABORT_NOT_RUNNING;
997}
998
999/***************************************************************************/
1000static int initio_bad_seq(struct initio_host * host)
1001{
1002 struct scsi_ctrl_blk *scb;
1003
1004 printk("initio_bad_seg c=%d\n", host->index);
1005
1006 if ((scb = host->active) != NULL) {
1007 initio_unlink_busy_scb(host, scb);
1008 scb->hastat = HOST_BAD_PHAS;
1009 scb->tastat = 0;
1010 initio_append_done_scb(host, scb);
1011 }
1012 initio_stop_bm(host);
1013 initio_reset_scsi(host, 8); /* 7/29/98 */
1014 return initio_post_scsi_rst(host);
1015}
1016
1017
1018/************************************************************************/
1019static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1020{
1021 unsigned long flags;
1022
1023 scb->mode = 0;
1024
1025 scb->sgidx = 0;
1026 scb->sgmax = scb->sglen;
1027
1028 spin_lock_irqsave(&host->semaph_lock, flags);
1029
1030 initio_append_pend_scb(host, scb); /* Append this SCB to Pending queue */
1031
1032/* VVVVV 07/21/98 */
1033 if (host->semaph == 1) {
1034 /* Disable Jasmin SCSI Int */
1035 outb(0x1F, host->addr + TUL_Mask);
1036 host->semaph = 0;
1037 spin_unlock_irqrestore(&host->semaph_lock, flags);
1038
1039 tulip_main(host);
1040
1041 spin_lock_irqsave(&host->semaph_lock, flags);
1042 host->semaph = 1;
1043 outb(0x0F, host->addr + TUL_Mask);
1044 }
1045 spin_unlock_irqrestore(&host->semaph_lock, flags);
1046 return;
1047}
1048
1049/***************************************************************************/
1050static int initio_isr(struct initio_host * host)
1051{
1052 if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1053 if (host->semaph == 1) {
1054 outb(0x1F, host->addr + TUL_Mask);
1055 /* Disable Tulip SCSI Int */
1056 host->semaph = 0;
1057
1058 tulip_main(host);
1059
1060 host->semaph = 1;
1061 outb(0x0F, host->addr + TUL_Mask);
1062 return 1;
1063 }
1064 }
1065 return 0;
1066}
1067
1068static int tulip_main(struct initio_host * host)
1069{
1070 struct scsi_ctrl_blk *scb;
1071
1072 for (;;) {
1073 tulip_scsi(host); /* Call tulip_scsi */
1074
1075 /* Walk the list of completed SCBs */
1076 while ((scb = initio_find_done_scb(host)) != NULL) { /* find done entry */
1077 if (scb->tastat == INI_QUEUE_FULL) {
1078 host->max_tags[scb->target] =
1079 host->act_tags[scb->target] - 1;
1080 scb->tastat = 0;
1081 initio_append_pend_scb(host, scb);
1082 continue;
1083 }
1084 if (!(scb->mode & SCM_RSENS)) { /* not in auto req. sense mode */
1085 if (scb->tastat == 2) {
1086
1087 /* clr sync. nego flag */
1088
1089 if (scb->flags & SCF_SENSE) {
1090 u8 len;
1091 len = scb->senselen;
1092 if (len == 0)
1093 len = 1;
1094 scb->buflen = scb->senselen;
1095 scb->bufptr = scb->senseptr;
1096 scb->flags &= ~(SCF_SG | SCF_DIR); /* for xfer_data_in */
1097 /* so, we won't report wrong direction in xfer_data_in,
1098 and won't report HOST_DO_DU in state_6 */
1099 scb->mode = SCM_RSENS;
1100 scb->ident &= 0xBF; /* Disable Disconnect */
1101 scb->tagmsg = 0;
1102 scb->tastat = 0;
1103 scb->cdblen = 6;
1104 scb->cdb[0] = SCSICMD_RequestSense;
1105 scb->cdb[1] = 0;
1106 scb->cdb[2] = 0;
1107 scb->cdb[3] = 0;
1108 scb->cdb[4] = len;
1109 scb->cdb[5] = 0;
1110 initio_push_pend_scb(host, scb);
1111 break;
1112 }
1113 }
1114 } else { /* in request sense mode */
1115
1116 if (scb->tastat == 2) { /* check contition status again after sending
1117 requset sense cmd 0x3 */
1118 scb->hastat = HOST_BAD_PHAS;
1119 }
1120 scb->tastat = 2;
1121 }
1122 scb->flags |= SCF_DONE;
1123 if (scb->flags & SCF_POST) {
1124 /* FIXME: only one post method and lose casts */
1125 (*scb->post) ((u8 *) host, (u8 *) scb);
1126 }
1127 } /* while */
1128 /* find_active: */
1129 if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1130 continue;
1131 if (host->active) /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1132 return 1; /* return to OS, enable interrupt */
1133 /* Check pending SCB */
1134 if (initio_find_first_pend_scb(host) == NULL)
1135 return 1; /* return to OS, enable interrupt */
1136 } /* End of for loop */
1137 /* statement won't reach here */
1138}
1139
1140static void tulip_scsi(struct initio_host * host)
1141{
1142 struct scsi_ctrl_blk *scb;
1143 struct target_control *active_tc;
1144
1145 /* make sure to service interrupt asap */
1146 if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1147 host->phase = host->jsstatus0 & TSS_PH_MASK;
1148 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1149 host->jsint = inb(host->addr + TUL_SInt);
1150 if (host->jsint & TSS_SCSIRST_INT) { /* SCSI bus reset detected */
1151 int_initio_scsi_rst(host);
1152 return;
1153 }
1154 if (host->jsint & TSS_RESEL_INT) { /* if selected/reselected interrupt */
1155 if (int_initio_resel(host) == 0)
1156 initio_next_state(host);
1157 return;
1158 }
1159 if (host->jsint & TSS_SEL_TIMEOUT) {
1160 int_initio_busfree(host);
1161 return;
1162 }
1163 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
1164 int_initio_busfree(host); /* unexpected bus free or sel timeout */
1165 return;
1166 }
1167 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) { /* func complete or Bus service */
1168 if (host->active)
1169 initio_next_state(host);
1170 return;
1171 }
1172 }
1173 if (host->active != NULL)
1174 return;
1175
1176 if ((scb = initio_find_first_pend_scb(host)) == NULL)
1177 return;
1178
1179 /* program HBA's SCSI ID & target SCSI ID */
1180 outb((host->scsi_id << 4) | (scb->target & 0x0F),
1181 host->addr + TUL_SScsiId);
1182 if (scb->opcode == ExecSCSI) {
1183 active_tc = &host->targets[scb->target];
1184
1185 if (scb->tagmsg)
1186 active_tc->drv_flags |= TCF_DRV_EN_TAG;
1187 else
1188 active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1189
1190 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1191 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) { /* do wdtr negotiation */
1192 initio_select_atn_stop(host, scb);
1193 } else {
1194 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { /* do sync negotiation */
1195 initio_select_atn_stop(host, scb);
1196 } else {
1197 if (scb->tagmsg)
1198 initio_select_atn3(host, scb);
1199 else
1200 initio_select_atn(host, scb);
1201 }
1202 }
1203 if (scb->flags & SCF_POLL) {
1204 while (wait_tulip(host) != -1) {
1205 if (initio_next_state(host) == -1)
1206 break;
1207 }
1208 }
1209 } else if (scb->opcode == BusDevRst) {
1210 initio_select_atn_stop(host, scb);
1211 scb->next_state = 8;
1212 if (scb->flags & SCF_POLL) {
1213 while (wait_tulip(host) != -1) {
1214 if (initio_next_state(host) == -1)
1215 break;
1216 }
1217 }
1218 } else if (scb->opcode == AbortCmd) {
1219 if (initio_abort_srb(host, scb->srb) != 0) {
1220 initio_unlink_pend_scb(host, scb);
1221 initio_release_scb(host, scb);
1222 } else {
1223 scb->opcode = BusDevRst;
1224 initio_select_atn_stop(host, scb);
1225 scb->next_state = 8;
1226 }
1227 } else {
1228 initio_unlink_pend_scb(host, scb);
1229 scb->hastat = 0x16; /* bad command */
1230 initio_append_done_scb(host, scb);
1231 }
1232 return;
1233}
1234
1235/**
1236 * initio_next_state - Next SCSI state
1237 * @host: InitIO host we are processing
1238 *
1239 * Progress the active command block along the state machine
1240 * until we hit a state which we must wait for activity to occur.
1241 *
1242 * Returns zero or a negative code.
1243 */
1244
1245static int initio_next_state(struct initio_host * host)
1246{
1247 int next;
1248
1249 next = host->active->next_state;
1250 for (;;) {
1251 switch (next) {
1252 case 1:
1253 next = initio_state_1(host);
1254 break;
1255 case 2:
1256 next = initio_state_2(host);
1257 break;
1258 case 3:
1259 next = initio_state_3(host);
1260 break;
1261 case 4:
1262 next = initio_state_4(host);
1263 break;
1264 case 5:
1265 next = initio_state_5(host);
1266 break;
1267 case 6:
1268 next = initio_state_6(host);
1269 break;
1270 case 7:
1271 next = initio_state_7(host);
1272 break;
1273 case 8:
1274 return initio_bus_device_reset(host);
1275 default:
1276 return initio_bad_seq(host);
1277 }
1278 if (next <= 0)
1279 return next;
1280 }
1281}
1282
1283
1284/**
1285 * initio_state_1 - SCSI state machine
1286 * @host: InitIO host we are controlling
1287 *
1288 * Perform SCSI state processing for Select/Attention/Stop
1289 */
1290
1291static int initio_state_1(struct initio_host * host)
1292{
1293 struct scsi_ctrl_blk *scb = host->active;
1294 struct target_control *active_tc = host->active_tc;
1295#if DEBUG_STATE
1296 printk("-s1-");
1297#endif
1298
1299 /* Move the SCB from pending to busy */
1300 initio_unlink_pend_scb(host, scb);
1301 initio_append_busy_scb(host, scb);
1302
1303 outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1304 /* ATN on */
1305 if (host->phase == MSG_OUT) {
1306 outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1307 outb(scb->ident, host->addr + TUL_SFifo);
1308
1309 if (scb->tagmsg) {
1310 outb(scb->tagmsg, host->addr + TUL_SFifo);
1311 outb(scb->tagid, host->addr + TUL_SFifo);
1312 }
1313 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1314 active_tc->flags |= TCF_WDTR_DONE;
1315 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1316 outb(2, host->addr + TUL_SFifo); /* Extended msg length */
1317 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); /* Sync request */
1318 outb(1, host->addr + TUL_SFifo); /* Start from 16 bits */
1319 } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1320 active_tc->flags |= TCF_SYNC_DONE;
1321 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1322 outb(3, host->addr + TUL_SFifo); /* extended msg length */
1323 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); /* sync request */
1324 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1325 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1326 }
1327 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1328 if (wait_tulip(host) == -1)
1329 return -1;
1330 }
1331 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1332 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1333 /* Into before CDB xfer */
1334 return 3;
1335}
1336
1337
1338/**
1339 * initio_state_2 - SCSI state machine
1340 * @host: InitIO host we are controlling
1341 *
1342 * state after selection with attention
1343 * state after selection with attention3
1344 */
1345
1346static int initio_state_2(struct initio_host * host)
1347{
1348 struct scsi_ctrl_blk *scb = host->active;
1349 struct target_control *active_tc = host->active_tc;
1350#if DEBUG_STATE
1351 printk("-s2-");
1352#endif
1353
1354 initio_unlink_pend_scb(host, scb);
1355 initio_append_busy_scb(host, scb);
1356
1357 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1358
1359 if (host->jsstatus1 & TSS_CMD_PH_CMP)
1360 return 4;
1361
1362 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1363 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1364 /* Into before CDB xfer */
1365 return 3;
1366}
1367
1368/**
1369 * initio_state_3 - SCSI state machine
1370 * @host: InitIO host we are controlling
1371 *
1372 * state before CDB xfer is done
1373 */
1374
1375static int initio_state_3(struct initio_host * host)
1376{
1377 struct scsi_ctrl_blk *scb = host->active;
1378 struct target_control *active_tc = host->active_tc;
1379 int i;
1380
1381#if DEBUG_STATE
1382 printk("-s3-");
1383#endif
1384 for (;;) {
1385 switch (host->phase) {
1386 case CMD_OUT: /* Command out phase */
1387 for (i = 0; i < (int) scb->cdblen; i++)
1388 outb(scb->cdb[i], host->addr + TUL_SFifo);
1389 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1390 if (wait_tulip(host) == -1)
1391 return -1;
1392 if (host->phase == CMD_OUT)
1393 return initio_bad_seq(host);
1394 return 4;
1395
1396 case MSG_IN: /* Message in phase */
1397 scb->next_state = 3;
1398 if (initio_msgin(host) == -1)
1399 return -1;
1400 break;
1401
1402 case STATUS_IN: /* Status phase */
1403 if (initio_status_msg(host) == -1)
1404 return -1;
1405 break;
1406
1407 case MSG_OUT: /* Message out phase */
1408 if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1409 outb(NOP, host->addr + TUL_SFifo); /* msg nop */
1410 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1411 if (wait_tulip(host) == -1)
1412 return -1;
1413 } else {
1414 active_tc->flags |= TCF_SYNC_DONE;
1415
1416 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1417 outb(3, host->addr + TUL_SFifo); /* ext. msg len */
1418 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); /* sync request */
1419 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1420 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1421 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1422 if (wait_tulip(host) == -1)
1423 return -1;
1424 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1425 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1426
1427 }
1428 break;
1429 default:
1430 return initio_bad_seq(host);
1431 }
1432 }
1433}
1434
1435/**
1436 * initio_state_4 - SCSI state machine
1437 * @host: InitIO host we are controlling
1438 *
1439 * SCSI state machine. State 4
1440 */
1441
1442static int initio_state_4(struct initio_host * host)
1443{
1444 struct scsi_ctrl_blk *scb = host->active;
1445
1446#if DEBUG_STATE
1447 printk("-s4-");
1448#endif
1449 if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1450 return 6; /* Go to state 6 (After data) */
1451 }
1452 for (;;) {
1453 if (scb->buflen == 0)
1454 return 6;
1455
1456 switch (host->phase) {
1457
1458 case STATUS_IN: /* Status phase */
1459 if ((scb->flags & SCF_DIR) != 0) /* if direction bit set then report data underrun */
1460 scb->hastat = HOST_DO_DU;
1461 if ((initio_status_msg(host)) == -1)
1462 return -1;
1463 break;
1464
1465 case MSG_IN: /* Message in phase */
1466 scb->next_state = 0x4;
1467 if (initio_msgin(host) == -1)
1468 return -1;
1469 break;
1470
1471 case MSG_OUT: /* Message out phase */
1472 if (host->jsstatus0 & TSS_PAR_ERROR) {
1473 scb->buflen = 0;
1474 scb->hastat = HOST_DO_DU;
1475 if (initio_msgout_ide(host) == -1)
1476 return -1;
1477 return 6;
1478 } else {
1479 outb(NOP, host->addr + TUL_SFifo); /* msg nop */
1480 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1481 if (wait_tulip(host) == -1)
1482 return -1;
1483 }
1484 break;
1485
1486 case DATA_IN: /* Data in phase */
1487 return initio_xfer_data_in(host);
1488
1489 case DATA_OUT: /* Data out phase */
1490 return initio_xfer_data_out(host);
1491
1492 default:
1493 return initio_bad_seq(host);
1494 }
1495 }
1496}
1497
1498
1499/**
1500 * initio_state_5 - SCSI state machine
1501 * @host: InitIO host we are controlling
1502 *
1503 * State after dma xfer done or phase change before xfer done
1504 */
1505
1506static int initio_state_5(struct initio_host * host)
1507{
1508 struct scsi_ctrl_blk *scb = host->active;
1509 long cnt, xcnt; /* cannot use unsigned !! code: if (xcnt < 0) */
1510
1511#if DEBUG_STATE
1512 printk("-s5-");
1513#endif
1514 /*------ get remaining count -------*/
1515 cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1516
1517 if (inb(host->addr + TUL_XCmd) & 0x20) {
1518 /* ----------------------- DATA_IN ----------------------------- */
1519 /* check scsi parity error */
1520 if (host->jsstatus0 & TSS_PAR_ERROR)
1521 scb->hastat = HOST_DO_DU;
1522 if (inb(host->addr + TUL_XStatus) & XPEND) { /* DMA xfer pending, Send STOP */
1523 /* tell Hardware scsi xfer has been terminated */
1524 outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1525 /* wait until DMA xfer not pending */
1526 while (inb(host->addr + TUL_XStatus) & XPEND)
1527 cpu_relax();
1528 }
1529 } else {
1530 /*-------- DATA OUT -----------*/
1531 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1532 if (host->active_tc->js_period & TSC_WIDE_SCSI)
1533 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1534 else
1535 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1536 }
1537 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
1538 outb(TAX_X_ABT, host->addr + TUL_XCmd);
1539 /* wait Abort DMA xfer done */
1540 while ((inb(host->addr + TUL_Int) & XABT) == 0)
1541 cpu_relax();
1542 }
1543 if ((cnt == 1) && (host->phase == DATA_OUT)) {
1544 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1545 if (wait_tulip(host) == -1)
1546 return -1;
1547 cnt = 0;
1548 } else {
1549 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1550 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1551 }
1552 }
1553 if (cnt == 0) {
1554 scb->buflen = 0;
1555 return 6; /* After Data */
1556 }
1557 /* Update active data pointer */
1558 xcnt = (long) scb->buflen - cnt; /* xcnt== bytes already xferred */
1559 scb->buflen = (u32) cnt; /* cnt == bytes left to be xferred */
1560 if (scb->flags & SCF_SG) {
1561 struct sg_entry *sgp;
1562 unsigned long i;
1563
1564 sgp = &scb->sglist[scb->sgidx];
1565 for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1566 xcnt -= (long) sgp->len;
1567 if (xcnt < 0) { /* this sgp xfer half done */
1568 xcnt += (long) sgp->len; /* xcnt == bytes xferred in this sgp */
1569 sgp->data += (u32) xcnt; /* new ptr to be xfer */
1570 sgp->len -= (u32) xcnt; /* new len to be xfer */
1571 scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1572 /* new SG table ptr */
1573 scb->sglen = (u8) (scb->sgmax - i);
1574 /* new SG table len */
1575 scb->sgidx = (u16) i;
1576 /* for next disc and come in this loop */
1577 return 4; /* Go to state 4 */
1578 }
1579 /* else (xcnt >= 0 , i.e. this sgp already xferred */
1580 } /* for */
1581 return 6; /* Go to state 6 */
1582 } else {
1583 scb->bufptr += (u32) xcnt;
1584 }
1585 return 4; /* Go to state 4 */
1586}
1587
1588/**
1589 * initio_state_6 - SCSI state machine
1590 * @host: InitIO host we are controlling
1591 *
1592 * State after Data phase
1593 */
1594
1595static int initio_state_6(struct initio_host * host)
1596{
1597 struct scsi_ctrl_blk *scb = host->active;
1598
1599#if DEBUG_STATE
1600 printk("-s6-");
1601#endif
1602 for (;;) {
1603 switch (host->phase) {
1604 case STATUS_IN: /* Status phase */
1605 if ((initio_status_msg(host)) == -1)
1606 return -1;
1607 break;
1608
1609 case MSG_IN: /* Message in phase */
1610 scb->next_state = 6;
1611 if ((initio_msgin(host)) == -1)
1612 return -1;
1613 break;
1614
1615 case MSG_OUT: /* Message out phase */
1616 outb(NOP, host->addr + TUL_SFifo); /* msg nop */
1617 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1618 if (wait_tulip(host) == -1)
1619 return -1;
1620 break;
1621
1622 case DATA_IN: /* Data in phase */
1623 return initio_xpad_in(host);
1624
1625 case DATA_OUT: /* Data out phase */
1626 return initio_xpad_out(host);
1627
1628 default:
1629 return initio_bad_seq(host);
1630 }
1631 }
1632}
1633
1634/**
1635 * initio_state_7 - SCSI state machine
1636 * @host: InitIO host we are controlling
1637 *
1638 */
1639
1640static int initio_state_7(struct initio_host * host)
1641{
1642 int cnt, i;
1643
1644#if DEBUG_STATE
1645 printk("-s7-");
1646#endif
1647 /* flush SCSI FIFO */
1648 cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1649 if (cnt) {
1650 for (i = 0; i < cnt; i++)
1651 inb(host->addr + TUL_SFifo);
1652 }
1653 switch (host->phase) {
1654 case DATA_IN: /* Data in phase */
1655 case DATA_OUT: /* Data out phase */
1656 return initio_bad_seq(host);
1657 default:
1658 return 6; /* Go to state 6 */
1659 }
1660}
1661
1662/**
1663 * initio_xfer_data_in - Commence data input
1664 * @host: InitIO host in use
1665 *
1666 * Commence a block of data transfer. The transfer itself will
1667 * be managed by the controller and we will get a completion (or
1668 * failure) interrupt.
1669 */
1670static int initio_xfer_data_in(struct initio_host * host)
1671{
1672 struct scsi_ctrl_blk *scb = host->active;
1673
1674 if ((scb->flags & SCF_DIR) == SCF_DOUT)
1675 return 6; /* wrong direction */
1676
1677 outl(scb->buflen, host->addr + TUL_SCnt0);
1678 outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd); /* 7/25/95 */
1679
1680 if (scb->flags & SCF_SG) { /* S/G xfer */
1681 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1682 outl(scb->bufptr, host->addr + TUL_XAddH);
1683 outb(TAX_SG_IN, host->addr + TUL_XCmd);
1684 } else {
1685 outl(scb->buflen, host->addr + TUL_XCntH);
1686 outl(scb->bufptr, host->addr + TUL_XAddH);
1687 outb(TAX_X_IN, host->addr + TUL_XCmd);
1688 }
1689 scb->next_state = 0x5;
1690 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1691}
1692
1693/**
1694 * initio_xfer_data_out - Commence data output
1695 * @host: InitIO host in use
1696 *
1697 * Commence a block of data transfer. The transfer itself will
1698 * be managed by the controller and we will get a completion (or
1699 * failure) interrupt.
1700 */
1701
1702static int initio_xfer_data_out(struct initio_host * host)
1703{
1704 struct scsi_ctrl_blk *scb = host->active;
1705
1706 if ((scb->flags & SCF_DIR) == SCF_DIN)
1707 return 6; /* wrong direction */
1708
1709 outl(scb->buflen, host->addr + TUL_SCnt0);
1710 outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1711
1712 if (scb->flags & SCF_SG) { /* S/G xfer */
1713 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1714 outl(scb->bufptr, host->addr + TUL_XAddH);
1715 outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1716 } else {
1717 outl(scb->buflen, host->addr + TUL_XCntH);
1718 outl(scb->bufptr, host->addr + TUL_XAddH);
1719 outb(TAX_X_OUT, host->addr + TUL_XCmd);
1720 }
1721
1722 scb->next_state = 0x5;
1723 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1724}
1725
1726int initio_xpad_in(struct initio_host * host)
1727{
1728 struct scsi_ctrl_blk *scb = host->active;
1729 struct target_control *active_tc = host->active_tc;
1730
1731 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1732 scb->hastat = HOST_DO_DU; /* over run */
1733 for (;;) {
1734 if (active_tc->js_period & TSC_WIDE_SCSI)
1735 outl(2, host->addr + TUL_SCnt0);
1736 else
1737 outl(1, host->addr + TUL_SCnt0);
1738
1739 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1740 if (wait_tulip(host) == -1)
1741 return -1;
1742 if (host->phase != DATA_IN) {
1743 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1744 return 6;
1745 }
1746 inb(host->addr + TUL_SFifo);
1747 }
1748}
1749
1750int initio_xpad_out(struct initio_host * host)
1751{
1752 struct scsi_ctrl_blk *scb = host->active;
1753 struct target_control *active_tc = host->active_tc;
1754
1755 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1756 scb->hastat = HOST_DO_DU; /* over run */
1757 for (;;) {
1758 if (active_tc->js_period & TSC_WIDE_SCSI)
1759 outl(2, host->addr + TUL_SCnt0);
1760 else
1761 outl(1, host->addr + TUL_SCnt0);
1762
1763 outb(0, host->addr + TUL_SFifo);
1764 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1765 if ((wait_tulip(host)) == -1)
1766 return -1;
1767 if (host->phase != DATA_OUT) { /* Disable wide CPU to allow read 16 bits */
1768 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1769 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1770 return 6;
1771 }
1772 }
1773}
1774
1775int initio_status_msg(struct initio_host * host)
1776{ /* status & MSG_IN */
1777 struct scsi_ctrl_blk *scb = host->active;
1778 u8 msg;
1779
1780 outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1781 if (wait_tulip(host) == -1)
1782 return -1;
1783
1784 /* get status */
1785 scb->tastat = inb(host->addr + TUL_SFifo);
1786
1787 if (host->phase == MSG_OUT) {
1788 if (host->jsstatus0 & TSS_PAR_ERROR)
1789 outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1790 else
1791 outb(NOP, host->addr + TUL_SFifo);
1792 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1793 return wait_tulip(host);
1794 }
1795 if (host->phase == MSG_IN) {
1796 msg = inb(host->addr + TUL_SFifo);
1797 if (host->jsstatus0 & TSS_PAR_ERROR) { /* Parity error */
1798 if ((initio_msgin_accept(host)) == -1)
1799 return -1;
1800 if (host->phase != MSG_OUT)
1801 return initio_bad_seq(host);
1802 outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1803 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1804 return wait_tulip(host);
1805 }
1806 if (msg == 0) { /* Command complete */
1807
1808 if ((scb->tastat & 0x18) == 0x10) /* No link support */
1809 return initio_bad_seq(host);
1810 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1811 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1812 return initio_wait_done_disc(host);
1813
1814 }
1815 if (msg == LINKED_CMD_COMPLETE ||
1816 msg == LINKED_FLG_CMD_COMPLETE) {
1817 if ((scb->tastat & 0x18) == 0x10)
1818 return initio_msgin_accept(host);
1819 }
1820 }
1821 return initio_bad_seq(host);
1822}
1823
1824
1825/* scsi bus free */
1826int int_initio_busfree(struct initio_host * host)
1827{
1828 struct scsi_ctrl_blk *scb = host->active;
1829
1830 if (scb != NULL) {
1831 if (scb->status & SCB_SELECT) { /* selection timeout */
1832 initio_unlink_pend_scb(host, scb);
1833 scb->hastat = HOST_SEL_TOUT;
1834 initio_append_done_scb(host, scb);
1835 } else { /* Unexpected bus free */
1836 initio_unlink_busy_scb(host, scb);
1837 scb->hastat = HOST_BUS_FREE;
1838 initio_append_done_scb(host, scb);
1839 }
1840 host->active = NULL;
1841 host->active_tc = NULL;
1842 }
1843 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
1844 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1845 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
1846 return -1;
1847}
1848
1849
1850/**
1851 * int_initio_scsi_rst - SCSI reset occurred
1852 * @host: Host seeing the reset
1853 *
1854 * A SCSI bus reset has occurred. Clean up any pending transfer
1855 * the hardware is doing by DMA and then abort all active and
1856 * disconnected commands. The mid layer should sort the rest out
1857 * for us
1858 */
1859
1860static int int_initio_scsi_rst(struct initio_host * host)
1861{
1862 struct scsi_ctrl_blk *scb;
1863 int i;
1864
1865 /* if DMA xfer is pending, abort DMA xfer */
1866 if (inb(host->addr + TUL_XStatus) & 0x01) {
1867 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1868 /* wait Abort DMA xfer done */
1869 while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1870 cpu_relax();
1871 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1872 }
1873 /* Abort all active & disconnected scb */
1874 while ((scb = initio_pop_busy_scb(host)) != NULL) {
1875 scb->hastat = HOST_BAD_PHAS;
1876 initio_append_done_scb(host, scb);
1877 }
1878 host->active = NULL;
1879 host->active_tc = NULL;
1880
1881 /* clr sync nego. done flag */
1882 for (i = 0; i < host->max_tar; i++)
1883 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1884 return -1;
1885}
1886
1887/**
1888 * int_initio_resel - Reselection occurred
1889 * @host: InitIO host adapter
1890 *
1891 * A SCSI reselection event has been signalled and the interrupt
1892 * is now being processed. Work out which command block needs attention
1893 * and continue processing that command.
1894 */
1895
1896int int_initio_resel(struct initio_host * host)
1897{
1898 struct scsi_ctrl_blk *scb;
1899 struct target_control *active_tc;
1900 u8 tag, msg = 0;
1901 u8 tar, lun;
1902
1903 if ((scb = host->active) != NULL) {
1904 /* FIXME: Why check and not just clear ? */
1905 if (scb->status & SCB_SELECT) /* if waiting for selection complete */
1906 scb->status &= ~SCB_SELECT;
1907 host->active = NULL;
1908 }
1909 /* --------- get target id---------------------- */
1910 tar = inb(host->addr + TUL_SBusId);
1911 /* ------ get LUN from Identify message----------- */
1912 lun = inb(host->addr + TUL_SIdent) & 0x0F;
1913 /* 07/22/98 from 0x1F -> 0x0F */
1914 active_tc = &host->targets[tar];
1915 host->active_tc = active_tc;
1916 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1917 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1918
1919 /* ------------- tag queueing ? ------------------- */
1920 if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1921 if ((initio_msgin_accept(host)) == -1)
1922 return -1;
1923 if (host->phase != MSG_IN)
1924 goto no_tag;
1925 outl(1, host->addr + TUL_SCnt0);
1926 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1927 if (wait_tulip(host) == -1)
1928 return -1;
1929 msg = inb(host->addr + TUL_SFifo); /* Read Tag Message */
1930
1931 if (msg < SIMPLE_QUEUE_TAG || msg > ORDERED_QUEUE_TAG)
1932 /* Is simple Tag */
1933 goto no_tag;
1934
1935 if (initio_msgin_accept(host) == -1)
1936 return -1;
1937
1938 if (host->phase != MSG_IN)
1939 goto no_tag;
1940
1941 outl(1, host->addr + TUL_SCnt0);
1942 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1943 if (wait_tulip(host) == -1)
1944 return -1;
1945 tag = inb(host->addr + TUL_SFifo); /* Read Tag ID */
1946 scb = host->scb + tag;
1947 if (scb->target != tar || scb->lun != lun) {
1948 return initio_msgout_abort_tag(host);
1949 }
1950 if (scb->status != SCB_BUSY) { /* 03/24/95 */
1951 return initio_msgout_abort_tag(host);
1952 }
1953 host->active = scb;
1954 if ((initio_msgin_accept(host)) == -1)
1955 return -1;
1956 } else { /* No tag */
1957 no_tag:
1958 if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
1959 return initio_msgout_abort_targ(host);
1960 }
1961 host->active = scb;
1962 if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
1963 if ((initio_msgin_accept(host)) == -1)
1964 return -1;
1965 }
1966 }
1967 return 0;
1968}
1969
1970/**
1971 * int_initio_bad_seq - out of phase
1972 * @host: InitIO host flagging event
1973 *
1974 * We have ended up out of phase somehow. Reset the host controller
1975 * and throw all our toys out of the pram. Let the midlayer clean up
1976 */
1977
1978static int int_initio_bad_seq(struct initio_host * host)
1979{ /* target wrong phase */
1980 struct scsi_ctrl_blk *scb;
1981 int i;
1982
1983 initio_reset_scsi(host, 10);
1984
1985 while ((scb = initio_pop_busy_scb(host)) != NULL) {
1986 scb->hastat = HOST_BAD_PHAS;
1987 initio_append_done_scb(host, scb);
1988 }
1989 for (i = 0; i < host->max_tar; i++)
1990 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1991 return -1;
1992}
1993
1994
1995/**
1996 * initio_msgout_abort_targ - abort a tag
1997 * @host: InitIO host
1998 *
1999 * Abort when the target/lun does not match or when our SCB is not
2000 * busy. Used by untagged commands.
2001 */
2002
2003static int initio_msgout_abort_targ(struct initio_host * host)
2004{
2005
2006 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2007 if (initio_msgin_accept(host) == -1)
2008 return -1;
2009 if (host->phase != MSG_OUT)
2010 return initio_bad_seq(host);
2011
2012 outb(ABORT_TASK_SET, host->addr + TUL_SFifo);
2013 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2014
2015 return initio_wait_disc(host);
2016}
2017
2018/**
2019 * initio_msgout_abort_tag - abort a tag
2020 * @host: InitIO host
2021 *
2022 * Abort when the target/lun does not match or when our SCB is not
2023 * busy. Used for tagged commands.
2024 */
2025
2026static int initio_msgout_abort_tag(struct initio_host * host)
2027{
2028
2029 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2030 if (initio_msgin_accept(host) == -1)
2031 return -1;
2032 if (host->phase != MSG_OUT)
2033 return initio_bad_seq(host);
2034
2035 outb(ABORT_TASK, host->addr + TUL_SFifo);
2036 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2037
2038 return initio_wait_disc(host);
2039
2040}
2041
2042/**
2043 * initio_msgin - Message in
2044 * @host: InitIO Host
2045 *
2046 * Process incoming message
2047 */
2048static int initio_msgin(struct initio_host * host)
2049{
2050 struct target_control *active_tc;
2051
2052 for (;;) {
2053 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2054
2055 outl(1, host->addr + TUL_SCnt0);
2056 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2057 if (wait_tulip(host) == -1)
2058 return -1;
2059
2060 switch (inb(host->addr + TUL_SFifo)) {
2061 case DISCONNECT: /* Disconnect msg */
2062 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2063 return initio_wait_disc(host);
2064 case SAVE_POINTERS:
2065 case RESTORE_POINTERS:
2066 case NOP:
2067 initio_msgin_accept(host);
2068 break;
2069 case MESSAGE_REJECT: /* Clear ATN first */
2070 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
2071 host->addr + TUL_SSignal);
2072 active_tc = host->active_tc;
2073 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) /* do sync nego */
2074 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
2075 host->addr + TUL_SSignal);
2076 initio_msgin_accept(host);
2077 break;
2078 case EXTENDED_MESSAGE: /* extended msg */
2079 initio_msgin_extend(host);
2080 break;
2081 case IGNORE_WIDE_RESIDUE:
2082 initio_msgin_accept(host);
2083 break;
2084 case COMMAND_COMPLETE:
2085 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2086 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2087 return initio_wait_done_disc(host);
2088 default:
2089 initio_msgout_reject(host);
2090 break;
2091 }
2092 if (host->phase != MSG_IN)
2093 return host->phase;
2094 }
2095 /* statement won't reach here */
2096}
2097
2098static int initio_msgout_reject(struct initio_host * host)
2099{
2100 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2101
2102 if (initio_msgin_accept(host) == -1)
2103 return -1;
2104
2105 if (host->phase == MSG_OUT) {
2106 outb(MESSAGE_REJECT, host->addr + TUL_SFifo); /* Msg reject */
2107 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2108 return wait_tulip(host);
2109 }
2110 return host->phase;
2111}
2112
2113static int initio_msgout_ide(struct initio_host * host)
2114{
2115 outb(INITIATOR_ERROR, host->addr + TUL_SFifo); /* Initiator Detected Error */
2116 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2117 return wait_tulip(host);
2118}
2119
2120static int initio_msgin_extend(struct initio_host * host)
2121{
2122 u8 len, idx;
2123
2124 if (initio_msgin_accept(host) != MSG_IN)
2125 return host->phase;
2126
2127 /* Get extended msg length */
2128 outl(1, host->addr + TUL_SCnt0);
2129 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2130 if (wait_tulip(host) == -1)
2131 return -1;
2132
2133 len = inb(host->addr + TUL_SFifo);
2134 host->msg[0] = len;
2135 for (idx = 1; len != 0; len--) {
2136
2137 if ((initio_msgin_accept(host)) != MSG_IN)
2138 return host->phase;
2139 outl(1, host->addr + TUL_SCnt0);
2140 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2141 if (wait_tulip(host) == -1)
2142 return -1;
2143 host->msg[idx++] = inb(host->addr + TUL_SFifo);
2144 }
2145 if (host->msg[1] == 1) { /* if it's synchronous data transfer request */
2146 u8 r;
2147 if (host->msg[0] != 3) /* if length is not right */
2148 return initio_msgout_reject(host);
2149 if (host->active_tc->flags & TCF_NO_SYNC_NEGO) { /* Set OFFSET=0 to do async, nego back */
2150 host->msg[3] = 0;
2151 } else {
2152 if (initio_msgin_sync(host) == 0 &&
2153 (host->active_tc->flags & TCF_SYNC_DONE)) {
2154 initio_sync_done(host);
2155 return initio_msgin_accept(host);
2156 }
2157 }
2158
2159 r = inb(host->addr + TUL_SSignal);
2160 outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
2161 host->addr + TUL_SSignal);
2162 if (initio_msgin_accept(host) != MSG_OUT)
2163 return host->phase;
2164 /* sync msg out */
2165 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2166
2167 initio_sync_done(host);
2168
2169 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2170 outb(3, host->addr + TUL_SFifo);
2171 outb(EXTENDED_SDTR, host->addr + TUL_SFifo);
2172 outb(host->msg[2], host->addr + TUL_SFifo);
2173 outb(host->msg[3], host->addr + TUL_SFifo);
2174 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2175 return wait_tulip(host);
2176 }
2177 if (host->msg[0] != 2 || host->msg[1] != 3)
2178 return initio_msgout_reject(host);
2179 /* if it's WIDE DATA XFER REQ */
2180 if (host->active_tc->flags & TCF_NO_WDTR) {
2181 host->msg[2] = 0;
2182 } else {
2183 if (host->msg[2] > 2) /* > 32 bits */
2184 return initio_msgout_reject(host);
2185 if (host->msg[2] == 2) { /* == 32 */
2186 host->msg[2] = 1;
2187 } else {
2188 if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
2189 wdtr_done(host);
2190 if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
2191 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2192 return initio_msgin_accept(host);
2193 }
2194 }
2195 }
2196 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2197
2198 if (initio_msgin_accept(host) != MSG_OUT)
2199 return host->phase;
2200 /* WDTR msg out */
2201 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2202 outb(2, host->addr + TUL_SFifo);
2203 outb(EXTENDED_WDTR, host->addr + TUL_SFifo);
2204 outb(host->msg[2], host->addr + TUL_SFifo);
2205 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2206 return wait_tulip(host);
2207}
2208
2209static int initio_msgin_sync(struct initio_host * host)
2210{
2211 char default_period;
2212
2213 default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
2214 if (host->msg[3] > MAX_OFFSET) {
2215 host->msg[3] = MAX_OFFSET;
2216 if (host->msg[2] < default_period) {
2217 host->msg[2] = default_period;
2218 return 1;
2219 }
2220 if (host->msg[2] >= 59) /* Change to async */
2221 host->msg[3] = 0;
2222 return 1;
2223 }
2224 /* offset requests asynchronous transfers ? */
2225 if (host->msg[3] == 0) {
2226 return 0;
2227 }
2228 if (host->msg[2] < default_period) {
2229 host->msg[2] = default_period;
2230 return 1;
2231 }
2232 if (host->msg[2] >= 59) {
2233 host->msg[3] = 0;
2234 return 1;
2235 }
2236 return 0;
2237}
2238
2239static int wdtr_done(struct initio_host * host)
2240{
2241 host->active_tc->flags &= ~TCF_SYNC_DONE;
2242 host->active_tc->flags |= TCF_WDTR_DONE;
2243
2244 host->active_tc->js_period = 0;
2245 if (host->msg[2]) /* if 16 bit */
2246 host->active_tc->js_period |= TSC_WIDE_SCSI;
2247 host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
2248 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2249 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2250
2251 return 1;
2252}
2253
2254static int initio_sync_done(struct initio_host * host)
2255{
2256 int i;
2257
2258 host->active_tc->flags |= TCF_SYNC_DONE;
2259
2260 if (host->msg[3]) {
2261 host->active_tc->js_period |= host->msg[3];
2262 for (i = 0; i < 8; i++) {
2263 if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
2264 break;
2265 }
2266 host->active_tc->js_period |= (i << 4);
2267 host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
2268 }
2269 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2270 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2271
2272 return -1;
2273}
2274
2275
2276static int initio_post_scsi_rst(struct initio_host * host)
2277{
2278 struct scsi_ctrl_blk *scb;
2279 struct target_control *active_tc;
2280 int i;
2281
2282 host->active = NULL;
2283 host->active_tc = NULL;
2284 host->flags = 0;
2285
2286 while ((scb = initio_pop_busy_scb(host)) != NULL) {
2287 scb->hastat = HOST_BAD_PHAS;
2288 initio_append_done_scb(host, scb);
2289 }
2290 /* clear sync done flag */
2291 active_tc = &host->targets[0];
2292 for (i = 0; i < host->max_tar; active_tc++, i++) {
2293 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2294 /* Initialize the sync. xfer register values to an asyn xfer */
2295 active_tc->js_period = 0;
2296 active_tc->sconfig0 = host->sconf1;
2297 host->act_tags[0] = 0; /* 07/22/98 */
2298 host->targets[i].flags &= ~TCF_BUSY; /* 07/22/98 */
2299 } /* for */
2300
2301 return -1;
2302}
2303
2304static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
2305{
2306 scb->status |= SCB_SELECT;
2307 scb->next_state = 0x1;
2308 host->active = scb;
2309 host->active_tc = &host->targets[scb->target];
2310 outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
2311}
2312
2313
2314static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
2315{
2316 int i;
2317
2318 scb->status |= SCB_SELECT;
2319 scb->next_state = 0x2;
2320
2321 outb(scb->ident, host->addr + TUL_SFifo);
2322 for (i = 0; i < (int) scb->cdblen; i++)
2323 outb(scb->cdb[i], host->addr + TUL_SFifo);
2324 host->active_tc = &host->targets[scb->target];
2325 host->active = scb;
2326 outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
2327}
2328
2329static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
2330{
2331 int i;
2332
2333 scb->status |= SCB_SELECT;
2334 scb->next_state = 0x2;
2335
2336 outb(scb->ident, host->addr + TUL_SFifo);
2337 outb(scb->tagmsg, host->addr + TUL_SFifo);
2338 outb(scb->tagid, host->addr + TUL_SFifo);
2339 for (i = 0; i < scb->cdblen; i++)
2340 outb(scb->cdb[i], host->addr + TUL_SFifo);
2341 host->active_tc = &host->targets[scb->target];
2342 host->active = scb;
2343 outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
2344}
2345
2346/**
2347 * initio_bus_device_reset - SCSI Bus Device Reset
2348 * @host: InitIO host to reset
2349 *
2350 * Perform a device reset and abort all pending SCBs for the
2351 * victim device
2352 */
2353int initio_bus_device_reset(struct initio_host * host)
2354{
2355 struct scsi_ctrl_blk *scb = host->active;
2356 struct target_control *active_tc = host->active_tc;
2357 struct scsi_ctrl_blk *tmp, *prev;
2358 u8 tar;
2359
2360 if (host->phase != MSG_OUT)
2361 return int_initio_bad_seq(host); /* Unexpected phase */
2362
2363 initio_unlink_pend_scb(host, scb);
2364 initio_release_scb(host, scb);
2365
2366
2367 tar = scb->target; /* target */
2368 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
2369 /* clr sync. nego & WDTR flags 07/22/98 */
2370
2371 /* abort all SCB with same target */
2372 prev = tmp = host->first_busy; /* Check Busy queue */
2373 while (tmp != NULL) {
2374 if (tmp->target == tar) {
2375 /* unlink it */
2376 if (tmp == host->first_busy) {
2377 if ((host->first_busy = tmp->next) == NULL)
2378 host->last_busy = NULL;
2379 } else {
2380 prev->next = tmp->next;
2381 if (tmp == host->last_busy)
2382 host->last_busy = prev;
2383 }
2384 tmp->hastat = HOST_ABORTED;
2385 initio_append_done_scb(host, tmp);
2386 }
2387 /* Previous haven't change */
2388 else {
2389 prev = tmp;
2390 }
2391 tmp = tmp->next;
2392 }
2393 outb(TARGET_RESET, host->addr + TUL_SFifo);
2394 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2395 return initio_wait_disc(host);
2396
2397}
2398
2399static int initio_msgin_accept(struct initio_host * host)
2400{
2401 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2402 return wait_tulip(host);
2403}
2404
2405static int wait_tulip(struct initio_host * host)
2406{
2407
2408 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2409 & TSS_INT_PENDING))
2410 cpu_relax();
2411
2412 host->jsint = inb(host->addr + TUL_SInt);
2413 host->phase = host->jsstatus0 & TSS_PH_MASK;
2414 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
2415
2416 if (host->jsint & TSS_RESEL_INT) /* if SCSI bus reset detected */
2417 return int_initio_resel(host);
2418 if (host->jsint & TSS_SEL_TIMEOUT) /* if selected/reselected timeout interrupt */
2419 return int_initio_busfree(host);
2420 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2421 return int_initio_scsi_rst(host);
2422
2423 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2424 if (host->flags & HCF_EXPECT_DONE_DISC) {
2425 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2426 initio_unlink_busy_scb(host, host->active);
2427 host->active->hastat = 0;
2428 initio_append_done_scb(host, host->active);
2429 host->active = NULL;
2430 host->active_tc = NULL;
2431 host->flags &= ~HCF_EXPECT_DONE_DISC;
2432 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2433 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2434 return -1;
2435 }
2436 if (host->flags & HCF_EXPECT_DISC) {
2437 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2438 host->active = NULL;
2439 host->active_tc = NULL;
2440 host->flags &= ~HCF_EXPECT_DISC;
2441 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2442 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2443 return -1;
2444 }
2445 return int_initio_busfree(host);
2446 }
2447 /* The old code really does the below. Can probably be removed */
2448 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
2449 return host->phase;
2450 return host->phase;
2451}
2452
2453static int initio_wait_disc(struct initio_host * host)
2454{
2455 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
2456 cpu_relax();
2457
2458 host->jsint = inb(host->addr + TUL_SInt);
2459
2460 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2461 return int_initio_scsi_rst(host);
2462 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2463 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2464 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2465 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2466 host->active = NULL;
2467 return -1;
2468 }
2469 return initio_bad_seq(host);
2470}
2471
2472static int initio_wait_done_disc(struct initio_host * host)
2473{
2474 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2475 & TSS_INT_PENDING))
2476 cpu_relax();
2477
2478 host->jsint = inb(host->addr + TUL_SInt);
2479
2480 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2481 return int_initio_scsi_rst(host);
2482 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2483 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2484 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2485 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2486 initio_unlink_busy_scb(host, host->active);
2487
2488 initio_append_done_scb(host, host->active);
2489 host->active = NULL;
2490 return -1;
2491 }
2492 return initio_bad_seq(host);
2493}
2494
2495/**
2496 * i91u_intr - IRQ handler
2497 * @irqno: IRQ number
2498 * @dev_id: IRQ identifier
2499 *
2500 * Take the relevant locks and then invoke the actual isr processing
2501 * code under the lock.
2502 */
2503
2504static irqreturn_t i91u_intr(int irqno, void *dev_id)
2505{
2506 struct Scsi_Host *dev = dev_id;
2507 unsigned long flags;
2508 int r;
2509
2510 spin_lock_irqsave(dev->host_lock, flags);
2511 r = initio_isr((struct initio_host *)dev->hostdata);
2512 spin_unlock_irqrestore(dev->host_lock, flags);
2513 if (r)
2514 return IRQ_HANDLED;
2515 else
2516 return IRQ_NONE;
2517}
2518
2519
2520/**
2521 * initio_build_scb - Build the mappings and SCB
2522 * @host: InitIO host taking the command
2523 * @cblk: Firmware command block
2524 * @cmnd: SCSI midlayer command block
2525 *
2526 * Translate the abstract SCSI command into a firmware command block
2527 * suitable for feeding to the InitIO host controller. This also requires
2528 * we build the scatter gather lists and ensure they are mapped properly.
2529 */
2530
2531static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
2532{ /* Create corresponding SCB */
2533 struct scatterlist *sglist;
2534 struct sg_entry *sg; /* Pointer to SG list */
2535 int i, nseg;
2536 long total_len;
2537 dma_addr_t dma_addr;
2538
2539 /* Fill in the command headers */
2540 cblk->post = i91uSCBPost; /* i91u's callback routine */
2541 cblk->srb = cmnd;
2542 cblk->opcode = ExecSCSI;
2543 cblk->flags = SCF_POST; /* After SCSI done, call post routine */
2544 cblk->target = cmnd->device->id;
2545 cblk->lun = cmnd->device->lun;
2546 cblk->ident = cmnd->device->lun | DISC_ALLOW;
2547
2548 cblk->flags |= SCF_SENSE; /* Turn on auto request sense */
2549
2550 /* Map the sense buffer into bus memory */
2551 dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
2552 SENSE_SIZE, DMA_FROM_DEVICE);
2553 cblk->senseptr = (u32)dma_addr;
2554 cblk->senselen = SENSE_SIZE;
2555 initio_priv(cmnd)->sense_dma_addr = dma_addr;
2556 cblk->cdblen = cmnd->cmd_len;
2557
2558 /* Clear the returned status */
2559 cblk->hastat = 0;
2560 cblk->tastat = 0;
2561 /* Command the command */
2562 memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
2563
2564 /* Set up tags */
2565 if (cmnd->device->tagged_supported) { /* Tag Support */
2566 cblk->tagmsg = SIMPLE_QUEUE_TAG; /* Do simple tag only */
2567 } else {
2568 cblk->tagmsg = 0; /* No tag support */
2569 }
2570
2571 /* todo handle map_sg error */
2572 nseg = scsi_dma_map(cmnd);
2573 BUG_ON(nseg < 0);
2574 if (nseg) {
2575 dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
2576 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2577 DMA_BIDIRECTIONAL);
2578 cblk->bufptr = (u32)dma_addr;
2579 initio_priv(cmnd)->sglist_dma_addr = dma_addr;
2580
2581 cblk->sglen = nseg;
2582
2583 cblk->flags |= SCF_SG; /* Turn on SG list flag */
2584 total_len = 0;
2585 sg = &cblk->sglist[0];
2586 scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
2587 sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
2588 sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
2589 total_len += sg_dma_len(sglist);
2590 ++sg;
2591 }
2592
2593 cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
2594 total_len : scsi_bufflen(cmnd);
2595 } else { /* No data transfer required */
2596 cblk->buflen = 0;
2597 cblk->sglen = 0;
2598 }
2599}
2600
2601/**
2602 * i91u_queuecommand_lck - Queue a new command if possible
2603 * @cmd: SCSI command block from the mid layer
2604 *
2605 * Attempts to queue a new command with the host adapter. Will return
2606 * zero if successful or indicate a host busy condition if not (which
2607 * will cause the mid layer to call us again later with the command)
2608 */
2609static int i91u_queuecommand_lck(struct scsi_cmnd *cmd)
2610{
2611 struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2612 struct scsi_ctrl_blk *cmnd;
2613
2614 cmnd = initio_alloc_scb(host);
2615 if (!cmnd)
2616 return SCSI_MLQUEUE_HOST_BUSY;
2617
2618 initio_build_scb(host, cmnd, cmd);
2619 initio_exec_scb(host, cmnd);
2620 return 0;
2621}
2622
2623static DEF_SCSI_QCMD(i91u_queuecommand)
2624
2625/**
2626 * i91u_bus_reset - reset the SCSI bus
2627 * @cmnd: Command block we want to trigger the reset for
2628 *
2629 * Initiate a SCSI bus reset sequence
2630 */
2631
2632static int i91u_bus_reset(struct scsi_cmnd * cmnd)
2633{
2634 struct initio_host *host;
2635
2636 host = (struct initio_host *) cmnd->device->host->hostdata;
2637
2638 spin_lock_irq(cmnd->device->host->host_lock);
2639 initio_reset_scsi(host, 0);
2640 spin_unlock_irq(cmnd->device->host->host_lock);
2641
2642 return SUCCESS;
2643}
2644
2645/**
2646 * i91u_biosparam - return the "logical geometry
2647 * @sdev: SCSI device
2648 * @dev: Matching block device
2649 * @capacity: Sector size of drive
2650 * @info_array: Return space for BIOS geometry
2651 *
2652 * Map the device geometry in a manner compatible with the host
2653 * controller BIOS behaviour.
2654 *
2655 * FIXME: limited to 2^32 sector devices.
2656 */
2657
2658static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2659 sector_t capacity, int *info_array)
2660{
2661 struct initio_host *host; /* Point to Host adapter control block */
2662 struct target_control *tc;
2663
2664 host = (struct initio_host *) sdev->host->hostdata;
2665 tc = &host->targets[sdev->id];
2666
2667 if (tc->heads) {
2668 info_array[0] = tc->heads;
2669 info_array[1] = tc->sectors;
2670 info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
2671 } else {
2672 if (tc->drv_flags & TCF_DRV_255_63) {
2673 info_array[0] = 255;
2674 info_array[1] = 63;
2675 info_array[2] = (unsigned long)capacity / 255 / 63;
2676 } else {
2677 info_array[0] = 64;
2678 info_array[1] = 32;
2679 info_array[2] = (unsigned long)capacity >> 11;
2680 }
2681 }
2682
2683#if defined(DEBUG_BIOSPARAM)
2684 if (i91u_debug & debug_biosparam) {
2685 printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2686 info_array[0], info_array[1], info_array[2]);
2687 printk("WARNING: check, if the bios geometry is correct.\n");
2688 }
2689#endif
2690
2691 return 0;
2692}
2693
2694/**
2695 * i91u_unmap_scb - Unmap a command
2696 * @pci_dev: PCI device the command is for
2697 * @cmnd: The command itself
2698 *
2699 * Unmap any PCI mapping/IOMMU resources allocated when the command
2700 * was mapped originally as part of initio_build_scb
2701 */
2702
2703static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
2704{
2705 /* auto sense buffer */
2706 if (initio_priv(cmnd)->sense_dma_addr) {
2707 dma_unmap_single(&pci_dev->dev,
2708 initio_priv(cmnd)->sense_dma_addr,
2709 SENSE_SIZE, DMA_FROM_DEVICE);
2710 initio_priv(cmnd)->sense_dma_addr = 0;
2711 }
2712
2713 /* request buffer */
2714 if (scsi_sg_count(cmnd)) {
2715 dma_unmap_single(&pci_dev->dev,
2716 initio_priv(cmnd)->sglist_dma_addr,
2717 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2718 DMA_BIDIRECTIONAL);
2719
2720 scsi_dma_unmap(cmnd);
2721 }
2722}
2723
2724/*
2725 * i91uSCBPost - SCSI callback
2726 *
2727 * This is callback routine be called when tulip finish one
2728 * SCSI command.
2729 */
2730
2731static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2732{
2733 struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2734 struct initio_host *host;
2735 struct scsi_ctrl_blk *cblk;
2736
2737 host = (struct initio_host *) host_mem;
2738 cblk = (struct scsi_ctrl_blk *) cblk_mem;
2739 if ((cmnd = cblk->srb) == NULL) {
2740 printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2741 WARN_ON(1);
2742 initio_release_scb(host, cblk); /* Release SCB for current channel */
2743 return;
2744 }
2745
2746 /*
2747 * Remap the firmware error status into a mid layer one
2748 */
2749 switch (cblk->hastat) {
2750 case 0x0:
2751 case 0xa: /* Linked command complete without error and linked normally */
2752 case 0xb: /* Linked command complete without error interrupt generated */
2753 cblk->hastat = 0;
2754 break;
2755
2756 case 0x11: /* Selection time out-The initiator selection or target
2757 reselection was not complete within the SCSI Time out period */
2758 cblk->hastat = DID_TIME_OUT;
2759 break;
2760
2761 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
2762 phase sequence was requested by the target. The host adapter
2763 will generate a SCSI Reset Condition, notifying the host with
2764 a SCRD interrupt */
2765 cblk->hastat = DID_RESET;
2766 break;
2767
2768 case 0x1a: /* SCB Aborted. 07/21/98 */
2769 cblk->hastat = DID_ABORT;
2770 break;
2771
2772 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
2773 than was allocated by the Data Length field or the sum of the
2774 Scatter / Gather Data Length fields. */
2775 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2776 case 0x16: /* Invalid SCB Operation Code. */
2777
2778 default:
2779 printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2780 cblk->hastat = DID_ERROR; /* Couldn't find any better */
2781 break;
2782 }
2783
2784 cmnd->result = cblk->tastat | (cblk->hastat << 16);
2785 i91u_unmap_scb(host->pci_dev, cmnd);
2786 scsi_done(cmnd); /* Notify system DONE */
2787 initio_release_scb(host, cblk); /* Release SCB for current channel */
2788}
2789
2790static const struct scsi_host_template initio_template = {
2791 .proc_name = "INI9100U",
2792 .name = "Initio INI-9X00U/UW SCSI device driver",
2793 .queuecommand = i91u_queuecommand,
2794 .eh_bus_reset_handler = i91u_bus_reset,
2795 .bios_param = i91u_biosparam,
2796 .can_queue = MAX_TARGETS * i91u_MAXQUEUE,
2797 .this_id = 1,
2798 .sg_tablesize = SG_ALL,
2799 .cmd_size = sizeof(struct initio_cmd_priv),
2800};
2801
2802static int initio_probe_one(struct pci_dev *pdev,
2803 const struct pci_device_id *id)
2804{
2805 struct Scsi_Host *shost;
2806 struct initio_host *host;
2807 u32 reg;
2808 u16 bios_seg;
2809 struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2810 int num_scb, i, error;
2811
2812 error = pci_enable_device(pdev);
2813 if (error)
2814 return error;
2815
2816 pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2817 bios_seg = (u16) (reg & 0xFF);
2818 if (((reg & 0xFF00) >> 8) == 0xFF)
2819 reg = 0;
2820 bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2821
2822 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
2823 printk(KERN_WARNING "i91u: Could not set 32 bit DMA mask\n");
2824 error = -ENODEV;
2825 goto out_disable_device;
2826 }
2827 shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2828 if (!shost) {
2829 printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2830 error = -ENOMEM;
2831 goto out_disable_device;
2832 }
2833 host = (struct initio_host *)shost->hostdata;
2834 memset(host, 0, sizeof(struct initio_host));
2835 host->addr = pci_resource_start(pdev, 0);
2836 host->bios_addr = bios_seg;
2837
2838 if (!request_region(host->addr, 256, "i91u")) {
2839 printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2840 error = -ENODEV;
2841 goto out_host_put;
2842 }
2843
2844 if (initio_tag_enable) /* 1.01i */
2845 num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2846 else
2847 num_scb = MAX_TARGETS + 3; /* 1-tape, 1-CD_ROM, 1- extra */
2848
2849 for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2850 i = num_scb * sizeof(struct scsi_ctrl_blk);
2851 scb = kzalloc(i, GFP_KERNEL);
2852 if (scb)
2853 break;
2854 }
2855
2856 if (!scb) {
2857 printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2858 error = -ENOMEM;
2859 goto out_release_region;
2860 }
2861
2862 host->pci_dev = pdev;
2863
2864 host->semaph = 1;
2865 spin_lock_init(&host->semaph_lock);
2866 host->num_scbs = num_scb;
2867 host->scb = scb;
2868 host->next_pending = scb;
2869 host->next_avail = scb;
2870 for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2871 tmp->tagid = i;
2872 if (i != 0)
2873 prev->next = tmp;
2874 prev = tmp;
2875 }
2876 prev->next = NULL;
2877 host->scb_end = tmp;
2878 host->first_avail = scb;
2879 host->last_avail = prev;
2880 spin_lock_init(&host->avail_lock);
2881
2882 initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
2883
2884 host->jsstatus0 = 0;
2885
2886 shost->io_port = host->addr;
2887 shost->n_io_port = 0xff;
2888 shost->can_queue = num_scb; /* 03/05/98 */
2889 shost->unique_id = host->addr;
2890 shost->max_id = host->max_tar;
2891 shost->max_lun = 32; /* 10/21/97 */
2892 shost->irq = pdev->irq;
2893 shost->this_id = host->scsi_id; /* Assign HCS index */
2894 shost->base = host->addr;
2895 shost->sg_tablesize = TOTAL_SG_ENTRY;
2896
2897 error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
2898 if (error < 0) {
2899 printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2900 goto out_free_scbs;
2901 }
2902
2903 pci_set_drvdata(pdev, shost);
2904
2905 error = scsi_add_host(shost, &pdev->dev);
2906 if (error)
2907 goto out_free_irq;
2908 scsi_scan_host(shost);
2909 return 0;
2910out_free_irq:
2911 free_irq(pdev->irq, shost);
2912out_free_scbs:
2913 kfree(host->scb);
2914out_release_region:
2915 release_region(host->addr, 256);
2916out_host_put:
2917 scsi_host_put(shost);
2918out_disable_device:
2919 pci_disable_device(pdev);
2920 return error;
2921}
2922
2923/**
2924 * initio_remove_one - control shutdown
2925 * @pdev: PCI device being released
2926 *
2927 * Release the resources assigned to this adapter after it has
2928 * finished being used.
2929 */
2930
2931static void initio_remove_one(struct pci_dev *pdev)
2932{
2933 struct Scsi_Host *host = pci_get_drvdata(pdev);
2934 struct initio_host *s = (struct initio_host *)host->hostdata;
2935 scsi_remove_host(host);
2936 free_irq(pdev->irq, host);
2937 release_region(s->addr, 256);
2938 scsi_host_put(host);
2939 pci_disable_device(pdev);
2940}
2941
2942MODULE_LICENSE("GPL");
2943
2944static struct pci_device_id initio_pci_tbl[] = {
2945 {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2946 {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2947 {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2948 {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2949 {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2950 {0,}
2951};
2952MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2953
2954static struct pci_driver initio_pci_driver = {
2955 .name = "initio",
2956 .id_table = initio_pci_tbl,
2957 .probe = initio_probe_one,
2958 .remove = initio_remove_one,
2959};
2960module_pci_driver(initio_pci_driver);
2961
2962MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
2963MODULE_AUTHOR("Initio Corporation");
2964MODULE_LICENSE("GPL");
1/**************************************************************************
2 * Initio 9100 device driver for Linux.
3 *
4 * Copyright (c) 1994-1998 Initio Corporation
5 * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
6 * Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
7 * Copyright (c) 2007 Red Hat
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 *
24 *************************************************************************
25 *
26 * DESCRIPTION:
27 *
28 * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
29 * adapters
30 *
31 * 08/06/97 hc - v1.01h
32 * - Support inic-940 and inic-935
33 * 09/26/97 hc - v1.01i
34 * - Make correction from J.W. Schultz suggestion
35 * 10/13/97 hc - Support reset function
36 * 10/21/97 hc - v1.01j
37 * - Support 32 LUN (SCSI 3)
38 * 01/14/98 hc - v1.01k
39 * - Fix memory allocation problem
40 * 03/04/98 hc - v1.01l
41 * - Fix tape rewind which will hang the system problem
42 * - Set can_queue to initio_num_scb
43 * 06/25/98 hc - v1.01m
44 * - Get it work for kernel version >= 2.1.75
45 * - Dynamic assign SCSI bus reset holding time in initio_init()
46 * 07/02/98 hc - v1.01n
47 * - Support 0002134A
48 * 08/07/98 hc - v1.01o
49 * - Change the initio_abort_srb routine to use scsi_done. <01>
50 * 09/07/98 hl - v1.02
51 * - Change the INI9100U define and proc_dir_entry to
52 * reflect the newer Kernel 2.1.118, but the v1.o1o
53 * should work with Kernel 2.1.118.
54 * 09/20/98 wh - v1.02a
55 * - Support Abort command.
56 * - Handle reset routine.
57 * 09/21/98 hl - v1.03
58 * - remove comments.
59 * 12/09/98 bv - v1.03a
60 * - Removed unused code
61 * 12/13/98 bv - v1.03b
62 * - Remove cli() locking for kernels >= 2.1.95. This uses
63 * spinlocks to serialize access to the pSRB_head and
64 * pSRB_tail members of the HCS structure.
65 * 09/01/99 bv - v1.03d
66 * - Fixed a deadlock problem in SMP.
67 * 21/01/99 bv - v1.03e
68 * - Add support for the Domex 3192U PCI SCSI
69 * This is a slightly modified patch by
70 * Brian Macy <bmacy@sunshinecomputing.com>
71 * 22/02/99 bv - v1.03f
72 * - Didn't detect the INIC-950 in 2.0.x correctly.
73 * Now fixed.
74 * 05/07/99 bv - v1.03g
75 * - Changed the assumption that HZ = 100
76 * 10/17/03 mc - v1.04
77 * - added new DMA API support
78 * 06/01/04 jmd - v1.04a
79 * - Re-add reset_bus support
80 **************************************************************************/
81
82#include <linux/module.h>
83#include <linux/errno.h>
84#include <linux/delay.h>
85#include <linux/pci.h>
86#include <linux/init.h>
87#include <linux/blkdev.h>
88#include <linux/spinlock.h>
89#include <linux/stat.h>
90#include <linux/kernel.h>
91#include <linux/proc_fs.h>
92#include <linux/string.h>
93#include <linux/interrupt.h>
94#include <linux/ioport.h>
95#include <linux/slab.h>
96#include <linux/jiffies.h>
97#include <linux/dma-mapping.h>
98#include <asm/io.h>
99
100#include <scsi/scsi.h>
101#include <scsi/scsi_cmnd.h>
102#include <scsi/scsi_device.h>
103#include <scsi/scsi_host.h>
104#include <scsi/scsi_tcq.h>
105
106#include "initio.h"
107
108#define SENSE_SIZE 14
109
110#define i91u_MAXQUEUE 2
111#define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a"
112
113#ifdef DEBUG_i91u
114static unsigned int i91u_debug = DEBUG_DEFAULT;
115#endif
116
117static int initio_tag_enable = 1;
118
119#ifdef DEBUG_i91u
120static int setup_debug = 0;
121#endif
122
123static void i91uSCBPost(u8 * pHcb, u8 * pScb);
124
125#define DEBUG_INTERRUPT 0
126#define DEBUG_QUEUE 0
127#define DEBUG_STATE 0
128#define INT_DISC 0
129
130/*--- forward references ---*/
131static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
132static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
133
134static int tulip_main(struct initio_host * host);
135
136static int initio_next_state(struct initio_host * host);
137static int initio_state_1(struct initio_host * host);
138static int initio_state_2(struct initio_host * host);
139static int initio_state_3(struct initio_host * host);
140static int initio_state_4(struct initio_host * host);
141static int initio_state_5(struct initio_host * host);
142static int initio_state_6(struct initio_host * host);
143static int initio_state_7(struct initio_host * host);
144static int initio_xfer_data_in(struct initio_host * host);
145static int initio_xfer_data_out(struct initio_host * host);
146static int initio_xpad_in(struct initio_host * host);
147static int initio_xpad_out(struct initio_host * host);
148static int initio_status_msg(struct initio_host * host);
149
150static int initio_msgin(struct initio_host * host);
151static int initio_msgin_sync(struct initio_host * host);
152static int initio_msgin_accept(struct initio_host * host);
153static int initio_msgout_reject(struct initio_host * host);
154static int initio_msgin_extend(struct initio_host * host);
155
156static int initio_msgout_ide(struct initio_host * host);
157static int initio_msgout_abort_targ(struct initio_host * host);
158static int initio_msgout_abort_tag(struct initio_host * host);
159
160static int initio_bus_device_reset(struct initio_host * host);
161static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
162static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
163static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
164static int int_initio_busfree(struct initio_host * host);
165static int int_initio_scsi_rst(struct initio_host * host);
166static int int_initio_bad_seq(struct initio_host * host);
167static int int_initio_resel(struct initio_host * host);
168static int initio_sync_done(struct initio_host * host);
169static int wdtr_done(struct initio_host * host);
170static int wait_tulip(struct initio_host * host);
171static int initio_wait_done_disc(struct initio_host * host);
172static int initio_wait_disc(struct initio_host * host);
173static void tulip_scsi(struct initio_host * host);
174static int initio_post_scsi_rst(struct initio_host * host);
175
176static void initio_se2_ew_en(unsigned long base);
177static void initio_se2_ew_ds(unsigned long base);
178static int initio_se2_rd_all(unsigned long base);
179static void initio_se2_update_all(unsigned long base); /* setup default pattern */
180static void initio_read_eeprom(unsigned long base);
181
182/* ---- INTERNAL VARIABLES ---- */
183
184static NVRAM i91unvram;
185static NVRAM *i91unvramp;
186
187static u8 i91udftNvRam[64] =
188{
189 /*----------- header -----------*/
190 0x25, 0xc9, /* Signature */
191 0x40, /* Size */
192 0x01, /* Revision */
193 /* -- Host Adapter Structure -- */
194 0x95, /* ModelByte0 */
195 0x00, /* ModelByte1 */
196 0x00, /* ModelInfo */
197 0x01, /* NumOfCh */
198 NBC1_DEFAULT, /* BIOSConfig1 */
199 0, /* BIOSConfig2 */
200 0, /* HAConfig1 */
201 0, /* HAConfig2 */
202 /* SCSI channel 0 and target Structure */
203 7, /* SCSIid */
204 NCC1_DEFAULT, /* SCSIconfig1 */
205 0, /* SCSIconfig2 */
206 0x10, /* NumSCSItarget */
207
208 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
209 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
210 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
211 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
212
213 /* SCSI channel 1 and target Structure */
214 7, /* SCSIid */
215 NCC1_DEFAULT, /* SCSIconfig1 */
216 0, /* SCSIconfig2 */
217 0x10, /* NumSCSItarget */
218
219 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
220 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
221 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
222 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
223 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
224 0, 0}; /* - CheckSum - */
225
226
227static u8 initio_rate_tbl[8] = /* fast 20 */
228{
229 /* nanosecond divide by 4 */
230 12, /* 50ns, 20M */
231 18, /* 75ns, 13.3M */
232 25, /* 100ns, 10M */
233 31, /* 125ns, 8M */
234 37, /* 150ns, 6.6M */
235 43, /* 175ns, 5.7M */
236 50, /* 200ns, 5M */
237 62 /* 250ns, 4M */
238};
239
240static void initio_do_pause(unsigned amount)
241{
242 /* Pause for amount jiffies */
243 unsigned long the_time = jiffies + amount;
244
245 while (time_before_eq(jiffies, the_time))
246 cpu_relax();
247}
248
249/*-- forward reference --*/
250
251/******************************************************************
252 Input: instruction for Serial E2PROM
253
254 EX: se2_rd(0 call se2_instr() to send address and read command
255
256 StartBit OP_Code Address Data
257 --------- -------- ------------------ -------
258 1 1 , 0 A5,A4,A3,A2,A1,A0 D15-D0
259
260 +-----------------------------------------------------
261 |
262 CS -----+
263 +--+ +--+ +--+ +--+ +--+
264 ^ | ^ | ^ | ^ | ^ |
265 | | | | | | | | | |
266 CLK -------+ +--+ +--+ +--+ +--+ +--
267 (leading edge trigger)
268
269 +--1-----1--+
270 | SB OP | OP A5 A4
271 DI ----+ +--0------------------
272 (address and cmd sent to nvram)
273
274 -------------------------------------------+
275 |
276 DO +---
277 (data sent from nvram)
278
279
280******************************************************************/
281
282/**
283 * initio_se2_instr - bitbang an instruction
284 * @base: Base of InitIO controller
285 * @instr: Instruction for serial E2PROM
286 *
287 * Bitbang an instruction out to the serial E2Prom
288 */
289
290static void initio_se2_instr(unsigned long base, u8 instr)
291{
292 int i;
293 u8 b;
294
295 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* cs+start bit */
296 udelay(30);
297 outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */
298 udelay(30);
299
300 for (i = 0; i < 8; i++) {
301 if (instr & 0x80)
302 b = SE2CS | SE2DO; /* -CLK+dataBit */
303 else
304 b = SE2CS; /* -CLK */
305 outb(b, base + TUL_NVRAM);
306 udelay(30);
307 outb(b | SE2CLK, base + TUL_NVRAM); /* +CLK */
308 udelay(30);
309 instr <<= 1;
310 }
311 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
312 udelay(30);
313}
314
315
316/**
317 * initio_se2_ew_en - Enable erase/write
318 * @base: Base address of InitIO controller
319 *
320 * Enable erase/write state of serial EEPROM
321 */
322void initio_se2_ew_en(unsigned long base)
323{
324 initio_se2_instr(base, 0x30); /* EWEN */
325 outb(0, base + TUL_NVRAM); /* -CS */
326 udelay(30);
327}
328
329
330/**
331 * initio_se2_ew_ds - Disable erase/write
332 * @base: Base address of InitIO controller
333 *
334 * Disable erase/write state of serial EEPROM
335 */
336void initio_se2_ew_ds(unsigned long base)
337{
338 initio_se2_instr(base, 0); /* EWDS */
339 outb(0, base + TUL_NVRAM); /* -CS */
340 udelay(30);
341}
342
343
344/**
345 * initio_se2_rd - read E2PROM word
346 * @base: Base of InitIO controller
347 * @addr: Address of word in E2PROM
348 *
349 * Read a word from the NV E2PROM device
350 */
351static u16 initio_se2_rd(unsigned long base, u8 addr)
352{
353 u8 instr, rb;
354 u16 val = 0;
355 int i;
356
357 instr = (u8) (addr | 0x80);
358 initio_se2_instr(base, instr); /* READ INSTR */
359
360 for (i = 15; i >= 0; i--) {
361 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
362 udelay(30);
363 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
364
365 /* sample data after the following edge of clock */
366 rb = inb(base + TUL_NVRAM);
367 rb &= SE2DI;
368 val += (rb << i);
369 udelay(30); /* 6/20/95 */
370 }
371
372 outb(0, base + TUL_NVRAM); /* no chip select */
373 udelay(30);
374 return val;
375}
376
377/**
378 * initio_se2_wr - read E2PROM word
379 * @base: Base of InitIO controller
380 * @addr: Address of word in E2PROM
381 * @val: Value to write
382 *
383 * Write a word to the NV E2PROM device. Used when recovering from
384 * a problem with the NV.
385 */
386static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
387{
388 u8 rb;
389 u8 instr;
390 int i;
391
392 instr = (u8) (addr | 0x40);
393 initio_se2_instr(base, instr); /* WRITE INSTR */
394 for (i = 15; i >= 0; i--) {
395 if (val & 0x8000)
396 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* -CLK+dataBit 1 */
397 else
398 outb(SE2CS, base + TUL_NVRAM); /* -CLK+dataBit 0 */
399 udelay(30);
400 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
401 udelay(30);
402 val <<= 1;
403 }
404 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
405 udelay(30);
406 outb(0, base + TUL_NVRAM); /* -CS */
407 udelay(30);
408
409 outb(SE2CS, base + TUL_NVRAM); /* +CS */
410 udelay(30);
411
412 for (;;) {
413 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
414 udelay(30);
415 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
416 udelay(30);
417 if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
418 break; /* write complete */
419 }
420 outb(0, base + TUL_NVRAM); /* -CS */
421}
422
423/**
424 * initio_se2_rd_all - read hostadapter NV configuration
425 * @base: Base address of InitIO controller
426 *
427 * Reads the E2PROM data into main memory. Ensures that the checksum
428 * and header marker are valid. Returns 1 on success -1 on error.
429 */
430
431static int initio_se2_rd_all(unsigned long base)
432{
433 int i;
434 u16 chksum = 0;
435 u16 *np;
436
437 i91unvramp = &i91unvram;
438 np = (u16 *) i91unvramp;
439 for (i = 0; i < 32; i++)
440 *np++ = initio_se2_rd(base, i);
441
442 /* Is signature "ini" ok ? */
443 if (i91unvramp->NVM_Signature != INI_SIGNATURE)
444 return -1;
445 /* Is ckecksum ok ? */
446 np = (u16 *) i91unvramp;
447 for (i = 0; i < 31; i++)
448 chksum += *np++;
449 if (i91unvramp->NVM_CheckSum != chksum)
450 return -1;
451 return 1;
452}
453
454/**
455 * initio_se2_update_all - Update E2PROM
456 * @base: Base of InitIO controller
457 *
458 * Update the E2PROM by wrting any changes into the E2PROM
459 * chip, rewriting the checksum.
460 */
461static void initio_se2_update_all(unsigned long base)
462{ /* setup default pattern */
463 int i;
464 u16 chksum = 0;
465 u16 *np, *np1;
466
467 i91unvramp = &i91unvram;
468 /* Calculate checksum first */
469 np = (u16 *) i91udftNvRam;
470 for (i = 0; i < 31; i++)
471 chksum += *np++;
472 *np = chksum;
473 initio_se2_ew_en(base); /* Enable write */
474
475 np = (u16 *) i91udftNvRam;
476 np1 = (u16 *) i91unvramp;
477 for (i = 0; i < 32; i++, np++, np1++) {
478 if (*np != *np1)
479 initio_se2_wr(base, i, *np);
480 }
481 initio_se2_ew_ds(base); /* Disable write */
482}
483
484/**
485 * initio_read_eeprom - Retrieve configuration
486 * @base: Base of InitIO Host Adapter
487 *
488 * Retrieve the host adapter configuration data from E2Prom. If the
489 * data is invalid then the defaults are used and are also restored
490 * into the E2PROM. This forms the access point for the SCSI driver
491 * into the E2PROM layer, the other functions for the E2PROM are all
492 * internal use.
493 *
494 * Must be called single threaded, uses a shared global area.
495 */
496
497static void initio_read_eeprom(unsigned long base)
498{
499 u8 gctrl;
500
501 i91unvramp = &i91unvram;
502 /* Enable EEProm programming */
503 gctrl = inb(base + TUL_GCTRL);
504 outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
505 if (initio_se2_rd_all(base) != 1) {
506 initio_se2_update_all(base); /* setup default pattern */
507 initio_se2_rd_all(base); /* load again */
508 }
509 /* Disable EEProm programming */
510 gctrl = inb(base + TUL_GCTRL);
511 outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
512}
513
514/**
515 * initio_stop_bm - stop bus master
516 * @host: InitIO we are stopping
517 *
518 * Stop any pending DMA operation, aborting the DMA if necessary
519 */
520
521static void initio_stop_bm(struct initio_host * host)
522{
523
524 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
525 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
526 /* wait Abort DMA xfer done */
527 while ((inb(host->addr + TUL_Int) & XABT) == 0)
528 cpu_relax();
529 }
530 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
531}
532
533/**
534 * initio_reset_scsi - Reset SCSI host controller
535 * @host: InitIO host to reset
536 * @seconds: Recovery time
537 *
538 * Perform a full reset of the SCSI subsystem.
539 */
540
541static int initio_reset_scsi(struct initio_host * host, int seconds)
542{
543 outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
544
545 while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
546 cpu_relax();
547
548 /* reset tulip chip */
549 outb(0, host->addr + TUL_SSignal);
550
551 /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
552 /* SONY 5200 tape drive won't work if only stall for 1 sec */
553 /* FIXME: this is a very long busy wait right now */
554 initio_do_pause(seconds * HZ);
555
556 inb(host->addr + TUL_SInt);
557 return SCSI_RESET_SUCCESS;
558}
559
560/**
561 * initio_init - set up an InitIO host adapter
562 * @host: InitIO host adapter
563 * @num_scbs: Number of SCBS
564 * @bios_addr: BIOS address
565 *
566 * Set up the host adapter and devices according to the configuration
567 * retrieved from the E2PROM.
568 *
569 * Locking: Calls E2PROM layer code which is not re-enterable so must
570 * run single threaded for now.
571 */
572
573static void initio_init(struct initio_host * host, u8 *bios_addr)
574{
575 int i;
576 u8 *flags;
577 u8 *heads;
578
579 /* Get E2Prom configuration */
580 initio_read_eeprom(host->addr);
581 if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
582 host->max_tar = 8;
583 else
584 host->max_tar = 16;
585
586 host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
587
588 host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
589 host->idmask = ~(1 << host->scsi_id);
590
591#ifdef CHK_PARITY
592 /* Enable parity error response */
593 outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
594#endif
595
596 /* Mask all the interrupt */
597 outb(0x1F, host->addr + TUL_Mask);
598
599 initio_stop_bm(host);
600 /* --- Initialize the tulip --- */
601 outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
602
603 /* program HBA's SCSI ID */
604 outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
605
606 /* Enable Initiator Mode ,phase latch,alternate sync period mode,
607 disable SCSI reset */
608 if (host->config & HCC_EN_PAR)
609 host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
610 else
611 host->sconf1 = (TSC_INITDEFAULT);
612 outb(host->sconf1, host->addr + TUL_SConfig);
613
614 /* Enable HW reselect */
615 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
616
617 outb(0, host->addr + TUL_SPeriod);
618
619 /* selection time out = 250 ms */
620 outb(153, host->addr + TUL_STimeOut);
621
622 /* Enable SCSI terminator */
623 outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
624 host->addr + TUL_XCtrl);
625 outb(((host->config & HCC_AUTO_TERM) >> 4) |
626 (inb(host->addr + TUL_GCTRL1) & 0xFE),
627 host->addr + TUL_GCTRL1);
628
629 for (i = 0,
630 flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
631 heads = bios_addr + 0x180;
632 i < host->max_tar;
633 i++, flags++) {
634 host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
635 if (host->targets[i].flags & TCF_EN_255)
636 host->targets[i].drv_flags = TCF_DRV_255_63;
637 else
638 host->targets[i].drv_flags = 0;
639 host->targets[i].js_period = 0;
640 host->targets[i].sconfig0 = host->sconf1;
641 host->targets[i].heads = *heads++;
642 if (host->targets[i].heads == 255)
643 host->targets[i].drv_flags = TCF_DRV_255_63;
644 else
645 host->targets[i].drv_flags = 0;
646 host->targets[i].sectors = *heads++;
647 host->targets[i].flags &= ~TCF_BUSY;
648 host->act_tags[i] = 0;
649 host->max_tags[i] = 0xFF;
650 } /* for */
651 printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
652 host->addr, host->pci_dev->irq,
653 host->bios_addr, host->scsi_id);
654 /* Reset SCSI Bus */
655 if (host->config & HCC_SCSI_RESET) {
656 printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
657 initio_reset_scsi(host, 10);
658 }
659 outb(0x17, host->addr + TUL_SCFG1);
660 outb(0xE9, host->addr + TUL_SIntEnable);
661}
662
663/**
664 * initio_alloc_scb - Allocate an SCB
665 * @host: InitIO host we are allocating for
666 *
667 * Walk the SCB list for the controller and allocate a free SCB if
668 * one exists.
669 */
670static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
671{
672 struct scsi_ctrl_blk *scb;
673 unsigned long flags;
674
675 spin_lock_irqsave(&host->avail_lock, flags);
676 if ((scb = host->first_avail) != NULL) {
677#if DEBUG_QUEUE
678 printk("find scb at %p\n", scb);
679#endif
680 if ((host->first_avail = scb->next) == NULL)
681 host->last_avail = NULL;
682 scb->next = NULL;
683 scb->status = SCB_RENT;
684 }
685 spin_unlock_irqrestore(&host->avail_lock, flags);
686 return scb;
687}
688
689/**
690 * initio_release_scb - Release an SCB
691 * @host: InitIO host that owns the SCB
692 * @cmnd: SCB command block being returned
693 *
694 * Return an allocated SCB to the host free list
695 */
696
697static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
698{
699 unsigned long flags;
700
701#if DEBUG_QUEUE
702 printk("Release SCB %p; ", cmnd);
703#endif
704 spin_lock_irqsave(&(host->avail_lock), flags);
705 cmnd->srb = NULL;
706 cmnd->status = 0;
707 cmnd->next = NULL;
708 if (host->last_avail != NULL) {
709 host->last_avail->next = cmnd;
710 host->last_avail = cmnd;
711 } else {
712 host->first_avail = cmnd;
713 host->last_avail = cmnd;
714 }
715 spin_unlock_irqrestore(&(host->avail_lock), flags);
716}
717
718/***************************************************************************/
719static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
720{
721
722#if DEBUG_QUEUE
723 printk("Append pend SCB %p; ", scbp);
724#endif
725 scbp->status = SCB_PEND;
726 scbp->next = NULL;
727 if (host->last_pending != NULL) {
728 host->last_pending->next = scbp;
729 host->last_pending = scbp;
730 } else {
731 host->first_pending = scbp;
732 host->last_pending = scbp;
733 }
734}
735
736/***************************************************************************/
737static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
738{
739
740#if DEBUG_QUEUE
741 printk("Push pend SCB %p; ", scbp);
742#endif
743 scbp->status = SCB_PEND;
744 if ((scbp->next = host->first_pending) != NULL) {
745 host->first_pending = scbp;
746 } else {
747 host->first_pending = scbp;
748 host->last_pending = scbp;
749 }
750}
751
752static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
753{
754 struct scsi_ctrl_blk *first;
755
756
757 first = host->first_pending;
758 while (first != NULL) {
759 if (first->opcode != ExecSCSI)
760 return first;
761 if (first->tagmsg == 0) {
762 if ((host->act_tags[first->target] == 0) &&
763 !(host->targets[first->target].flags & TCF_BUSY))
764 return first;
765 } else {
766 if ((host->act_tags[first->target] >=
767 host->max_tags[first->target]) |
768 (host->targets[first->target].flags & TCF_BUSY)) {
769 first = first->next;
770 continue;
771 }
772 return first;
773 }
774 first = first->next;
775 }
776 return first;
777}
778
779static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
780{
781 struct scsi_ctrl_blk *tmp, *prev;
782
783#if DEBUG_QUEUE
784 printk("unlink pend SCB %p; ", scb);
785#endif
786
787 prev = tmp = host->first_pending;
788 while (tmp != NULL) {
789 if (scb == tmp) { /* Unlink this SCB */
790 if (tmp == host->first_pending) {
791 if ((host->first_pending = tmp->next) == NULL)
792 host->last_pending = NULL;
793 } else {
794 prev->next = tmp->next;
795 if (tmp == host->last_pending)
796 host->last_pending = prev;
797 }
798 tmp->next = NULL;
799 break;
800 }
801 prev = tmp;
802 tmp = tmp->next;
803 }
804}
805
806static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
807{
808
809#if DEBUG_QUEUE
810 printk("append busy SCB %p; ", scbp);
811#endif
812 if (scbp->tagmsg)
813 host->act_tags[scbp->target]++;
814 else
815 host->targets[scbp->target].flags |= TCF_BUSY;
816 scbp->status = SCB_BUSY;
817 scbp->next = NULL;
818 if (host->last_busy != NULL) {
819 host->last_busy->next = scbp;
820 host->last_busy = scbp;
821 } else {
822 host->first_busy = scbp;
823 host->last_busy = scbp;
824 }
825}
826
827/***************************************************************************/
828static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
829{
830 struct scsi_ctrl_blk *tmp;
831
832
833 if ((tmp = host->first_busy) != NULL) {
834 if ((host->first_busy = tmp->next) == NULL)
835 host->last_busy = NULL;
836 tmp->next = NULL;
837 if (tmp->tagmsg)
838 host->act_tags[tmp->target]--;
839 else
840 host->targets[tmp->target].flags &= ~TCF_BUSY;
841 }
842#if DEBUG_QUEUE
843 printk("Pop busy SCB %p; ", tmp);
844#endif
845 return tmp;
846}
847
848/***************************************************************************/
849static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
850{
851 struct scsi_ctrl_blk *tmp, *prev;
852
853#if DEBUG_QUEUE
854 printk("unlink busy SCB %p; ", scb);
855#endif
856
857 prev = tmp = host->first_busy;
858 while (tmp != NULL) {
859 if (scb == tmp) { /* Unlink this SCB */
860 if (tmp == host->first_busy) {
861 if ((host->first_busy = tmp->next) == NULL)
862 host->last_busy = NULL;
863 } else {
864 prev->next = tmp->next;
865 if (tmp == host->last_busy)
866 host->last_busy = prev;
867 }
868 tmp->next = NULL;
869 if (tmp->tagmsg)
870 host->act_tags[tmp->target]--;
871 else
872 host->targets[tmp->target].flags &= ~TCF_BUSY;
873 break;
874 }
875 prev = tmp;
876 tmp = tmp->next;
877 }
878 return;
879}
880
881struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
882{
883 struct scsi_ctrl_blk *tmp, *prev;
884 u16 scbp_tarlun;
885
886
887 prev = tmp = host->first_busy;
888 while (tmp != NULL) {
889 scbp_tarlun = (tmp->lun << 8) | (tmp->target);
890 if (scbp_tarlun == tarlun) { /* Unlink this SCB */
891 break;
892 }
893 prev = tmp;
894 tmp = tmp->next;
895 }
896#if DEBUG_QUEUE
897 printk("find busy SCB %p; ", tmp);
898#endif
899 return tmp;
900}
901
902static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
903{
904#if DEBUG_QUEUE
905 printk("append done SCB %p; ", scbp);
906#endif
907
908 scbp->status = SCB_DONE;
909 scbp->next = NULL;
910 if (host->last_done != NULL) {
911 host->last_done->next = scbp;
912 host->last_done = scbp;
913 } else {
914 host->first_done = scbp;
915 host->last_done = scbp;
916 }
917}
918
919struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
920{
921 struct scsi_ctrl_blk *tmp;
922
923 if ((tmp = host->first_done) != NULL) {
924 if ((host->first_done = tmp->next) == NULL)
925 host->last_done = NULL;
926 tmp->next = NULL;
927 }
928#if DEBUG_QUEUE
929 printk("find done SCB %p; ",tmp);
930#endif
931 return tmp;
932}
933
934static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
935{
936 unsigned long flags;
937 struct scsi_ctrl_blk *tmp, *prev;
938
939 spin_lock_irqsave(&host->semaph_lock, flags);
940
941 if ((host->semaph == 0) && (host->active == NULL)) {
942 /* disable Jasmin SCSI Int */
943 outb(0x1F, host->addr + TUL_Mask);
944 spin_unlock_irqrestore(&host->semaph_lock, flags);
945 /* FIXME: synchronize_irq needed ? */
946 tulip_main(host);
947 spin_lock_irqsave(&host->semaph_lock, flags);
948 host->semaph = 1;
949 outb(0x0F, host->addr + TUL_Mask);
950 spin_unlock_irqrestore(&host->semaph_lock, flags);
951 return SCSI_ABORT_SNOOZE;
952 }
953 prev = tmp = host->first_pending; /* Check Pend queue */
954 while (tmp != NULL) {
955 /* 07/27/98 */
956 if (tmp->srb == srbp) {
957 if (tmp == host->active) {
958 spin_unlock_irqrestore(&host->semaph_lock, flags);
959 return SCSI_ABORT_BUSY;
960 } else if (tmp == host->first_pending) {
961 if ((host->first_pending = tmp->next) == NULL)
962 host->last_pending = NULL;
963 } else {
964 prev->next = tmp->next;
965 if (tmp == host->last_pending)
966 host->last_pending = prev;
967 }
968 tmp->hastat = HOST_ABORTED;
969 tmp->flags |= SCF_DONE;
970 if (tmp->flags & SCF_POST)
971 (*tmp->post) ((u8 *) host, (u8 *) tmp);
972 spin_unlock_irqrestore(&host->semaph_lock, flags);
973 return SCSI_ABORT_SUCCESS;
974 }
975 prev = tmp;
976 tmp = tmp->next;
977 }
978
979 prev = tmp = host->first_busy; /* Check Busy queue */
980 while (tmp != NULL) {
981 if (tmp->srb == srbp) {
982 if (tmp == host->active) {
983 spin_unlock_irqrestore(&host->semaph_lock, flags);
984 return SCSI_ABORT_BUSY;
985 } else if (tmp->tagmsg == 0) {
986 spin_unlock_irqrestore(&host->semaph_lock, flags);
987 return SCSI_ABORT_BUSY;
988 } else {
989 host->act_tags[tmp->target]--;
990 if (tmp == host->first_busy) {
991 if ((host->first_busy = tmp->next) == NULL)
992 host->last_busy = NULL;
993 } else {
994 prev->next = tmp->next;
995 if (tmp == host->last_busy)
996 host->last_busy = prev;
997 }
998 tmp->next = NULL;
999
1000
1001 tmp->hastat = HOST_ABORTED;
1002 tmp->flags |= SCF_DONE;
1003 if (tmp->flags & SCF_POST)
1004 (*tmp->post) ((u8 *) host, (u8 *) tmp);
1005 spin_unlock_irqrestore(&host->semaph_lock, flags);
1006 return SCSI_ABORT_SUCCESS;
1007 }
1008 }
1009 prev = tmp;
1010 tmp = tmp->next;
1011 }
1012 spin_unlock_irqrestore(&host->semaph_lock, flags);
1013 return SCSI_ABORT_NOT_RUNNING;
1014}
1015
1016/***************************************************************************/
1017static int initio_bad_seq(struct initio_host * host)
1018{
1019 struct scsi_ctrl_blk *scb;
1020
1021 printk("initio_bad_seg c=%d\n", host->index);
1022
1023 if ((scb = host->active) != NULL) {
1024 initio_unlink_busy_scb(host, scb);
1025 scb->hastat = HOST_BAD_PHAS;
1026 scb->tastat = 0;
1027 initio_append_done_scb(host, scb);
1028 }
1029 initio_stop_bm(host);
1030 initio_reset_scsi(host, 8); /* 7/29/98 */
1031 return initio_post_scsi_rst(host);
1032}
1033
1034
1035/************************************************************************/
1036static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1037{
1038 unsigned long flags;
1039
1040 scb->mode = 0;
1041
1042 scb->sgidx = 0;
1043 scb->sgmax = scb->sglen;
1044
1045 spin_lock_irqsave(&host->semaph_lock, flags);
1046
1047 initio_append_pend_scb(host, scb); /* Append this SCB to Pending queue */
1048
1049/* VVVVV 07/21/98 */
1050 if (host->semaph == 1) {
1051 /* Disable Jasmin SCSI Int */
1052 outb(0x1F, host->addr + TUL_Mask);
1053 host->semaph = 0;
1054 spin_unlock_irqrestore(&host->semaph_lock, flags);
1055
1056 tulip_main(host);
1057
1058 spin_lock_irqsave(&host->semaph_lock, flags);
1059 host->semaph = 1;
1060 outb(0x0F, host->addr + TUL_Mask);
1061 }
1062 spin_unlock_irqrestore(&host->semaph_lock, flags);
1063 return;
1064}
1065
1066/***************************************************************************/
1067static int initio_isr(struct initio_host * host)
1068{
1069 if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1070 if (host->semaph == 1) {
1071 outb(0x1F, host->addr + TUL_Mask);
1072 /* Disable Tulip SCSI Int */
1073 host->semaph = 0;
1074
1075 tulip_main(host);
1076
1077 host->semaph = 1;
1078 outb(0x0F, host->addr + TUL_Mask);
1079 return 1;
1080 }
1081 }
1082 return 0;
1083}
1084
1085static int tulip_main(struct initio_host * host)
1086{
1087 struct scsi_ctrl_blk *scb;
1088
1089 for (;;) {
1090 tulip_scsi(host); /* Call tulip_scsi */
1091
1092 /* Walk the list of completed SCBs */
1093 while ((scb = initio_find_done_scb(host)) != NULL) { /* find done entry */
1094 if (scb->tastat == INI_QUEUE_FULL) {
1095 host->max_tags[scb->target] =
1096 host->act_tags[scb->target] - 1;
1097 scb->tastat = 0;
1098 initio_append_pend_scb(host, scb);
1099 continue;
1100 }
1101 if (!(scb->mode & SCM_RSENS)) { /* not in auto req. sense mode */
1102 if (scb->tastat == 2) {
1103
1104 /* clr sync. nego flag */
1105
1106 if (scb->flags & SCF_SENSE) {
1107 u8 len;
1108 len = scb->senselen;
1109 if (len == 0)
1110 len = 1;
1111 scb->buflen = scb->senselen;
1112 scb->bufptr = scb->senseptr;
1113 scb->flags &= ~(SCF_SG | SCF_DIR); /* for xfer_data_in */
1114 /* so, we won't report wrong direction in xfer_data_in,
1115 and won't report HOST_DO_DU in state_6 */
1116 scb->mode = SCM_RSENS;
1117 scb->ident &= 0xBF; /* Disable Disconnect */
1118 scb->tagmsg = 0;
1119 scb->tastat = 0;
1120 scb->cdblen = 6;
1121 scb->cdb[0] = SCSICMD_RequestSense;
1122 scb->cdb[1] = 0;
1123 scb->cdb[2] = 0;
1124 scb->cdb[3] = 0;
1125 scb->cdb[4] = len;
1126 scb->cdb[5] = 0;
1127 initio_push_pend_scb(host, scb);
1128 break;
1129 }
1130 }
1131 } else { /* in request sense mode */
1132
1133 if (scb->tastat == 2) { /* check contition status again after sending
1134 requset sense cmd 0x3 */
1135 scb->hastat = HOST_BAD_PHAS;
1136 }
1137 scb->tastat = 2;
1138 }
1139 scb->flags |= SCF_DONE;
1140 if (scb->flags & SCF_POST) {
1141 /* FIXME: only one post method and lose casts */
1142 (*scb->post) ((u8 *) host, (u8 *) scb);
1143 }
1144 } /* while */
1145 /* find_active: */
1146 if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1147 continue;
1148 if (host->active) /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1149 return 1; /* return to OS, enable interrupt */
1150 /* Check pending SCB */
1151 if (initio_find_first_pend_scb(host) == NULL)
1152 return 1; /* return to OS, enable interrupt */
1153 } /* End of for loop */
1154 /* statement won't reach here */
1155}
1156
1157static void tulip_scsi(struct initio_host * host)
1158{
1159 struct scsi_ctrl_blk *scb;
1160 struct target_control *active_tc;
1161
1162 /* make sure to service interrupt asap */
1163 if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1164 host->phase = host->jsstatus0 & TSS_PH_MASK;
1165 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1166 host->jsint = inb(host->addr + TUL_SInt);
1167 if (host->jsint & TSS_SCSIRST_INT) { /* SCSI bus reset detected */
1168 int_initio_scsi_rst(host);
1169 return;
1170 }
1171 if (host->jsint & TSS_RESEL_INT) { /* if selected/reselected interrupt */
1172 if (int_initio_resel(host) == 0)
1173 initio_next_state(host);
1174 return;
1175 }
1176 if (host->jsint & TSS_SEL_TIMEOUT) {
1177 int_initio_busfree(host);
1178 return;
1179 }
1180 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
1181 int_initio_busfree(host); /* unexpected bus free or sel timeout */
1182 return;
1183 }
1184 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) { /* func complete or Bus service */
1185 if ((scb = host->active) != NULL)
1186 initio_next_state(host);
1187 return;
1188 }
1189 }
1190 if (host->active != NULL)
1191 return;
1192
1193 if ((scb = initio_find_first_pend_scb(host)) == NULL)
1194 return;
1195
1196 /* program HBA's SCSI ID & target SCSI ID */
1197 outb((host->scsi_id << 4) | (scb->target & 0x0F),
1198 host->addr + TUL_SScsiId);
1199 if (scb->opcode == ExecSCSI) {
1200 active_tc = &host->targets[scb->target];
1201
1202 if (scb->tagmsg)
1203 active_tc->drv_flags |= TCF_DRV_EN_TAG;
1204 else
1205 active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1206
1207 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1208 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) { /* do wdtr negotiation */
1209 initio_select_atn_stop(host, scb);
1210 } else {
1211 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { /* do sync negotiation */
1212 initio_select_atn_stop(host, scb);
1213 } else {
1214 if (scb->tagmsg)
1215 initio_select_atn3(host, scb);
1216 else
1217 initio_select_atn(host, scb);
1218 }
1219 }
1220 if (scb->flags & SCF_POLL) {
1221 while (wait_tulip(host) != -1) {
1222 if (initio_next_state(host) == -1)
1223 break;
1224 }
1225 }
1226 } else if (scb->opcode == BusDevRst) {
1227 initio_select_atn_stop(host, scb);
1228 scb->next_state = 8;
1229 if (scb->flags & SCF_POLL) {
1230 while (wait_tulip(host) != -1) {
1231 if (initio_next_state(host) == -1)
1232 break;
1233 }
1234 }
1235 } else if (scb->opcode == AbortCmd) {
1236 if (initio_abort_srb(host, scb->srb) != 0) {
1237 initio_unlink_pend_scb(host, scb);
1238 initio_release_scb(host, scb);
1239 } else {
1240 scb->opcode = BusDevRst;
1241 initio_select_atn_stop(host, scb);
1242 scb->next_state = 8;
1243 }
1244 } else {
1245 initio_unlink_pend_scb(host, scb);
1246 scb->hastat = 0x16; /* bad command */
1247 initio_append_done_scb(host, scb);
1248 }
1249 return;
1250}
1251
1252/**
1253 * initio_next_state - Next SCSI state
1254 * @host: InitIO host we are processing
1255 *
1256 * Progress the active command block along the state machine
1257 * until we hit a state which we must wait for activity to occur.
1258 *
1259 * Returns zero or a negative code.
1260 */
1261
1262static int initio_next_state(struct initio_host * host)
1263{
1264 int next;
1265
1266 next = host->active->next_state;
1267 for (;;) {
1268 switch (next) {
1269 case 1:
1270 next = initio_state_1(host);
1271 break;
1272 case 2:
1273 next = initio_state_2(host);
1274 break;
1275 case 3:
1276 next = initio_state_3(host);
1277 break;
1278 case 4:
1279 next = initio_state_4(host);
1280 break;
1281 case 5:
1282 next = initio_state_5(host);
1283 break;
1284 case 6:
1285 next = initio_state_6(host);
1286 break;
1287 case 7:
1288 next = initio_state_7(host);
1289 break;
1290 case 8:
1291 return initio_bus_device_reset(host);
1292 default:
1293 return initio_bad_seq(host);
1294 }
1295 if (next <= 0)
1296 return next;
1297 }
1298}
1299
1300
1301/**
1302 * initio_state_1 - SCSI state machine
1303 * @host: InitIO host we are controlling
1304 *
1305 * Perform SCSI state processing for Select/Attention/Stop
1306 */
1307
1308static int initio_state_1(struct initio_host * host)
1309{
1310 struct scsi_ctrl_blk *scb = host->active;
1311 struct target_control *active_tc = host->active_tc;
1312#if DEBUG_STATE
1313 printk("-s1-");
1314#endif
1315
1316 /* Move the SCB from pending to busy */
1317 initio_unlink_pend_scb(host, scb);
1318 initio_append_busy_scb(host, scb);
1319
1320 outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1321 /* ATN on */
1322 if (host->phase == MSG_OUT) {
1323 outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1324 outb(scb->ident, host->addr + TUL_SFifo);
1325
1326 if (scb->tagmsg) {
1327 outb(scb->tagmsg, host->addr + TUL_SFifo);
1328 outb(scb->tagid, host->addr + TUL_SFifo);
1329 }
1330 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1331 active_tc->flags |= TCF_WDTR_DONE;
1332 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1333 outb(2, host->addr + TUL_SFifo); /* Extended msg length */
1334 outb(3, host->addr + TUL_SFifo); /* Sync request */
1335 outb(1, host->addr + TUL_SFifo); /* Start from 16 bits */
1336 } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1337 active_tc->flags |= TCF_SYNC_DONE;
1338 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1339 outb(3, host->addr + TUL_SFifo); /* extended msg length */
1340 outb(1, host->addr + TUL_SFifo); /* sync request */
1341 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1342 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1343 }
1344 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1345 if (wait_tulip(host) == -1)
1346 return -1;
1347 }
1348 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1349 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1350 /* Into before CDB xfer */
1351 return 3;
1352}
1353
1354
1355/**
1356 * initio_state_2 - SCSI state machine
1357 * @host: InitIO host we are controlling
1358 *
1359 * state after selection with attention
1360 * state after selection with attention3
1361 */
1362
1363static int initio_state_2(struct initio_host * host)
1364{
1365 struct scsi_ctrl_blk *scb = host->active;
1366 struct target_control *active_tc = host->active_tc;
1367#if DEBUG_STATE
1368 printk("-s2-");
1369#endif
1370
1371 initio_unlink_pend_scb(host, scb);
1372 initio_append_busy_scb(host, scb);
1373
1374 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1375
1376 if (host->jsstatus1 & TSS_CMD_PH_CMP)
1377 return 4;
1378
1379 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1380 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1381 /* Into before CDB xfer */
1382 return 3;
1383}
1384
1385/**
1386 * initio_state_3 - SCSI state machine
1387 * @host: InitIO host we are controlling
1388 *
1389 * state before CDB xfer is done
1390 */
1391
1392static int initio_state_3(struct initio_host * host)
1393{
1394 struct scsi_ctrl_blk *scb = host->active;
1395 struct target_control *active_tc = host->active_tc;
1396 int i;
1397
1398#if DEBUG_STATE
1399 printk("-s3-");
1400#endif
1401 for (;;) {
1402 switch (host->phase) {
1403 case CMD_OUT: /* Command out phase */
1404 for (i = 0; i < (int) scb->cdblen; i++)
1405 outb(scb->cdb[i], host->addr + TUL_SFifo);
1406 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1407 if (wait_tulip(host) == -1)
1408 return -1;
1409 if (host->phase == CMD_OUT)
1410 return initio_bad_seq(host);
1411 return 4;
1412
1413 case MSG_IN: /* Message in phase */
1414 scb->next_state = 3;
1415 if (initio_msgin(host) == -1)
1416 return -1;
1417 break;
1418
1419 case STATUS_IN: /* Status phase */
1420 if (initio_status_msg(host) == -1)
1421 return -1;
1422 break;
1423
1424 case MSG_OUT: /* Message out phase */
1425 if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1426 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1427 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1428 if (wait_tulip(host) == -1)
1429 return -1;
1430 } else {
1431 active_tc->flags |= TCF_SYNC_DONE;
1432
1433 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1434 outb(3, host->addr + TUL_SFifo); /* ext. msg len */
1435 outb(1, host->addr + TUL_SFifo); /* sync request */
1436 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1437 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1438 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1439 if (wait_tulip(host) == -1)
1440 return -1;
1441 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1442 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1443
1444 }
1445 break;
1446 default:
1447 return initio_bad_seq(host);
1448 }
1449 }
1450}
1451
1452/**
1453 * initio_state_4 - SCSI state machine
1454 * @host: InitIO host we are controlling
1455 *
1456 * SCSI state machine. State 4
1457 */
1458
1459static int initio_state_4(struct initio_host * host)
1460{
1461 struct scsi_ctrl_blk *scb = host->active;
1462
1463#if DEBUG_STATE
1464 printk("-s4-");
1465#endif
1466 if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1467 return 6; /* Go to state 6 (After data) */
1468 }
1469 for (;;) {
1470 if (scb->buflen == 0)
1471 return 6;
1472
1473 switch (host->phase) {
1474
1475 case STATUS_IN: /* Status phase */
1476 if ((scb->flags & SCF_DIR) != 0) /* if direction bit set then report data underrun */
1477 scb->hastat = HOST_DO_DU;
1478 if ((initio_status_msg(host)) == -1)
1479 return -1;
1480 break;
1481
1482 case MSG_IN: /* Message in phase */
1483 scb->next_state = 0x4;
1484 if (initio_msgin(host) == -1)
1485 return -1;
1486 break;
1487
1488 case MSG_OUT: /* Message out phase */
1489 if (host->jsstatus0 & TSS_PAR_ERROR) {
1490 scb->buflen = 0;
1491 scb->hastat = HOST_DO_DU;
1492 if (initio_msgout_ide(host) == -1)
1493 return -1;
1494 return 6;
1495 } else {
1496 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1497 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1498 if (wait_tulip(host) == -1)
1499 return -1;
1500 }
1501 break;
1502
1503 case DATA_IN: /* Data in phase */
1504 return initio_xfer_data_in(host);
1505
1506 case DATA_OUT: /* Data out phase */
1507 return initio_xfer_data_out(host);
1508
1509 default:
1510 return initio_bad_seq(host);
1511 }
1512 }
1513}
1514
1515
1516/**
1517 * initio_state_5 - SCSI state machine
1518 * @host: InitIO host we are controlling
1519 *
1520 * State after dma xfer done or phase change before xfer done
1521 */
1522
1523static int initio_state_5(struct initio_host * host)
1524{
1525 struct scsi_ctrl_blk *scb = host->active;
1526 long cnt, xcnt; /* cannot use unsigned !! code: if (xcnt < 0) */
1527
1528#if DEBUG_STATE
1529 printk("-s5-");
1530#endif
1531 /*------ get remaining count -------*/
1532 cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1533
1534 if (inb(host->addr + TUL_XCmd) & 0x20) {
1535 /* ----------------------- DATA_IN ----------------------------- */
1536 /* check scsi parity error */
1537 if (host->jsstatus0 & TSS_PAR_ERROR)
1538 scb->hastat = HOST_DO_DU;
1539 if (inb(host->addr + TUL_XStatus) & XPEND) { /* DMA xfer pending, Send STOP */
1540 /* tell Hardware scsi xfer has been terminated */
1541 outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1542 /* wait until DMA xfer not pending */
1543 while (inb(host->addr + TUL_XStatus) & XPEND)
1544 cpu_relax();
1545 }
1546 } else {
1547 /*-------- DATA OUT -----------*/
1548 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1549 if (host->active_tc->js_period & TSC_WIDE_SCSI)
1550 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1551 else
1552 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1553 }
1554 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
1555 outb(TAX_X_ABT, host->addr + TUL_XCmd);
1556 /* wait Abort DMA xfer done */
1557 while ((inb(host->addr + TUL_Int) & XABT) == 0)
1558 cpu_relax();
1559 }
1560 if ((cnt == 1) && (host->phase == DATA_OUT)) {
1561 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1562 if (wait_tulip(host) == -1)
1563 return -1;
1564 cnt = 0;
1565 } else {
1566 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1567 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1568 }
1569 }
1570 if (cnt == 0) {
1571 scb->buflen = 0;
1572 return 6; /* After Data */
1573 }
1574 /* Update active data pointer */
1575 xcnt = (long) scb->buflen - cnt; /* xcnt== bytes already xferred */
1576 scb->buflen = (u32) cnt; /* cnt == bytes left to be xferred */
1577 if (scb->flags & SCF_SG) {
1578 struct sg_entry *sgp;
1579 unsigned long i;
1580
1581 sgp = &scb->sglist[scb->sgidx];
1582 for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1583 xcnt -= (long) sgp->len;
1584 if (xcnt < 0) { /* this sgp xfer half done */
1585 xcnt += (long) sgp->len; /* xcnt == bytes xferred in this sgp */
1586 sgp->data += (u32) xcnt; /* new ptr to be xfer */
1587 sgp->len -= (u32) xcnt; /* new len to be xfer */
1588 scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1589 /* new SG table ptr */
1590 scb->sglen = (u8) (scb->sgmax - i);
1591 /* new SG table len */
1592 scb->sgidx = (u16) i;
1593 /* for next disc and come in this loop */
1594 return 4; /* Go to state 4 */
1595 }
1596 /* else (xcnt >= 0 , i.e. this sgp already xferred */
1597 } /* for */
1598 return 6; /* Go to state 6 */
1599 } else {
1600 scb->bufptr += (u32) xcnt;
1601 }
1602 return 4; /* Go to state 4 */
1603}
1604
1605/**
1606 * initio_state_6 - SCSI state machine
1607 * @host: InitIO host we are controlling
1608 *
1609 * State after Data phase
1610 */
1611
1612static int initio_state_6(struct initio_host * host)
1613{
1614 struct scsi_ctrl_blk *scb = host->active;
1615
1616#if DEBUG_STATE
1617 printk("-s6-");
1618#endif
1619 for (;;) {
1620 switch (host->phase) {
1621 case STATUS_IN: /* Status phase */
1622 if ((initio_status_msg(host)) == -1)
1623 return -1;
1624 break;
1625
1626 case MSG_IN: /* Message in phase */
1627 scb->next_state = 6;
1628 if ((initio_msgin(host)) == -1)
1629 return -1;
1630 break;
1631
1632 case MSG_OUT: /* Message out phase */
1633 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1634 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1635 if (wait_tulip(host) == -1)
1636 return -1;
1637 break;
1638
1639 case DATA_IN: /* Data in phase */
1640 return initio_xpad_in(host);
1641
1642 case DATA_OUT: /* Data out phase */
1643 return initio_xpad_out(host);
1644
1645 default:
1646 return initio_bad_seq(host);
1647 }
1648 }
1649}
1650
1651/**
1652 * initio_state_7 - SCSI state machine
1653 * @host: InitIO host we are controlling
1654 *
1655 */
1656
1657int initio_state_7(struct initio_host * host)
1658{
1659 int cnt, i;
1660
1661#if DEBUG_STATE
1662 printk("-s7-");
1663#endif
1664 /* flush SCSI FIFO */
1665 cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1666 if (cnt) {
1667 for (i = 0; i < cnt; i++)
1668 inb(host->addr + TUL_SFifo);
1669 }
1670 switch (host->phase) {
1671 case DATA_IN: /* Data in phase */
1672 case DATA_OUT: /* Data out phase */
1673 return initio_bad_seq(host);
1674 default:
1675 return 6; /* Go to state 6 */
1676 }
1677}
1678
1679/**
1680 * initio_xfer_data_in - Commence data input
1681 * @host: InitIO host in use
1682 *
1683 * Commence a block of data transfer. The transfer itself will
1684 * be managed by the controller and we will get a completion (or
1685 * failure) interrupt.
1686 */
1687static int initio_xfer_data_in(struct initio_host * host)
1688{
1689 struct scsi_ctrl_blk *scb = host->active;
1690
1691 if ((scb->flags & SCF_DIR) == SCF_DOUT)
1692 return 6; /* wrong direction */
1693
1694 outl(scb->buflen, host->addr + TUL_SCnt0);
1695 outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd); /* 7/25/95 */
1696
1697 if (scb->flags & SCF_SG) { /* S/G xfer */
1698 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1699 outl(scb->bufptr, host->addr + TUL_XAddH);
1700 outb(TAX_SG_IN, host->addr + TUL_XCmd);
1701 } else {
1702 outl(scb->buflen, host->addr + TUL_XCntH);
1703 outl(scb->bufptr, host->addr + TUL_XAddH);
1704 outb(TAX_X_IN, host->addr + TUL_XCmd);
1705 }
1706 scb->next_state = 0x5;
1707 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1708}
1709
1710/**
1711 * initio_xfer_data_out - Commence data output
1712 * @host: InitIO host in use
1713 *
1714 * Commence a block of data transfer. The transfer itself will
1715 * be managed by the controller and we will get a completion (or
1716 * failure) interrupt.
1717 */
1718
1719static int initio_xfer_data_out(struct initio_host * host)
1720{
1721 struct scsi_ctrl_blk *scb = host->active;
1722
1723 if ((scb->flags & SCF_DIR) == SCF_DIN)
1724 return 6; /* wrong direction */
1725
1726 outl(scb->buflen, host->addr + TUL_SCnt0);
1727 outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1728
1729 if (scb->flags & SCF_SG) { /* S/G xfer */
1730 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1731 outl(scb->bufptr, host->addr + TUL_XAddH);
1732 outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1733 } else {
1734 outl(scb->buflen, host->addr + TUL_XCntH);
1735 outl(scb->bufptr, host->addr + TUL_XAddH);
1736 outb(TAX_X_OUT, host->addr + TUL_XCmd);
1737 }
1738
1739 scb->next_state = 0x5;
1740 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1741}
1742
1743int initio_xpad_in(struct initio_host * host)
1744{
1745 struct scsi_ctrl_blk *scb = host->active;
1746 struct target_control *active_tc = host->active_tc;
1747
1748 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1749 scb->hastat = HOST_DO_DU; /* over run */
1750 for (;;) {
1751 if (active_tc->js_period & TSC_WIDE_SCSI)
1752 outl(2, host->addr + TUL_SCnt0);
1753 else
1754 outl(1, host->addr + TUL_SCnt0);
1755
1756 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1757 if (wait_tulip(host) == -1)
1758 return -1;
1759 if (host->phase != DATA_IN) {
1760 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1761 return 6;
1762 }
1763 inb(host->addr + TUL_SFifo);
1764 }
1765}
1766
1767int initio_xpad_out(struct initio_host * host)
1768{
1769 struct scsi_ctrl_blk *scb = host->active;
1770 struct target_control *active_tc = host->active_tc;
1771
1772 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1773 scb->hastat = HOST_DO_DU; /* over run */
1774 for (;;) {
1775 if (active_tc->js_period & TSC_WIDE_SCSI)
1776 outl(2, host->addr + TUL_SCnt0);
1777 else
1778 outl(1, host->addr + TUL_SCnt0);
1779
1780 outb(0, host->addr + TUL_SFifo);
1781 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1782 if ((wait_tulip(host)) == -1)
1783 return -1;
1784 if (host->phase != DATA_OUT) { /* Disable wide CPU to allow read 16 bits */
1785 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1786 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1787 return 6;
1788 }
1789 }
1790}
1791
1792int initio_status_msg(struct initio_host * host)
1793{ /* status & MSG_IN */
1794 struct scsi_ctrl_blk *scb = host->active;
1795 u8 msg;
1796
1797 outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1798 if (wait_tulip(host) == -1)
1799 return -1;
1800
1801 /* get status */
1802 scb->tastat = inb(host->addr + TUL_SFifo);
1803
1804 if (host->phase == MSG_OUT) {
1805 if (host->jsstatus0 & TSS_PAR_ERROR)
1806 outb(MSG_PARITY, host->addr + TUL_SFifo);
1807 else
1808 outb(MSG_NOP, host->addr + TUL_SFifo);
1809 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1810 return wait_tulip(host);
1811 }
1812 if (host->phase == MSG_IN) {
1813 msg = inb(host->addr + TUL_SFifo);
1814 if (host->jsstatus0 & TSS_PAR_ERROR) { /* Parity error */
1815 if ((initio_msgin_accept(host)) == -1)
1816 return -1;
1817 if (host->phase != MSG_OUT)
1818 return initio_bad_seq(host);
1819 outb(MSG_PARITY, host->addr + TUL_SFifo);
1820 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1821 return wait_tulip(host);
1822 }
1823 if (msg == 0) { /* Command complete */
1824
1825 if ((scb->tastat & 0x18) == 0x10) /* No link support */
1826 return initio_bad_seq(host);
1827 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1828 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1829 return initio_wait_done_disc(host);
1830
1831 }
1832 if (msg == MSG_LINK_COMP || msg == MSG_LINK_FLAG) {
1833 if ((scb->tastat & 0x18) == 0x10)
1834 return initio_msgin_accept(host);
1835 }
1836 }
1837 return initio_bad_seq(host);
1838}
1839
1840
1841/* scsi bus free */
1842int int_initio_busfree(struct initio_host * host)
1843{
1844 struct scsi_ctrl_blk *scb = host->active;
1845
1846 if (scb != NULL) {
1847 if (scb->status & SCB_SELECT) { /* selection timeout */
1848 initio_unlink_pend_scb(host, scb);
1849 scb->hastat = HOST_SEL_TOUT;
1850 initio_append_done_scb(host, scb);
1851 } else { /* Unexpected bus free */
1852 initio_unlink_busy_scb(host, scb);
1853 scb->hastat = HOST_BUS_FREE;
1854 initio_append_done_scb(host, scb);
1855 }
1856 host->active = NULL;
1857 host->active_tc = NULL;
1858 }
1859 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
1860 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1861 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
1862 return -1;
1863}
1864
1865
1866/**
1867 * int_initio_scsi_rst - SCSI reset occurred
1868 * @host: Host seeing the reset
1869 *
1870 * A SCSI bus reset has occurred. Clean up any pending transfer
1871 * the hardware is doing by DMA and then abort all active and
1872 * disconnected commands. The mid layer should sort the rest out
1873 * for us
1874 */
1875
1876static int int_initio_scsi_rst(struct initio_host * host)
1877{
1878 struct scsi_ctrl_blk *scb;
1879 int i;
1880
1881 /* if DMA xfer is pending, abort DMA xfer */
1882 if (inb(host->addr + TUL_XStatus) & 0x01) {
1883 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1884 /* wait Abort DMA xfer done */
1885 while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1886 cpu_relax();
1887 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1888 }
1889 /* Abort all active & disconnected scb */
1890 while ((scb = initio_pop_busy_scb(host)) != NULL) {
1891 scb->hastat = HOST_BAD_PHAS;
1892 initio_append_done_scb(host, scb);
1893 }
1894 host->active = NULL;
1895 host->active_tc = NULL;
1896
1897 /* clr sync nego. done flag */
1898 for (i = 0; i < host->max_tar; i++)
1899 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1900 return -1;
1901}
1902
1903/**
1904 * int_initio_scsi_resel - Reselection occurred
1905 * @host: InitIO host adapter
1906 *
1907 * A SCSI reselection event has been signalled and the interrupt
1908 * is now being processed. Work out which command block needs attention
1909 * and continue processing that command.
1910 */
1911
1912int int_initio_resel(struct initio_host * host)
1913{
1914 struct scsi_ctrl_blk *scb;
1915 struct target_control *active_tc;
1916 u8 tag, msg = 0;
1917 u8 tar, lun;
1918
1919 if ((scb = host->active) != NULL) {
1920 /* FIXME: Why check and not just clear ? */
1921 if (scb->status & SCB_SELECT) /* if waiting for selection complete */
1922 scb->status &= ~SCB_SELECT;
1923 host->active = NULL;
1924 }
1925 /* --------- get target id---------------------- */
1926 tar = inb(host->addr + TUL_SBusId);
1927 /* ------ get LUN from Identify message----------- */
1928 lun = inb(host->addr + TUL_SIdent) & 0x0F;
1929 /* 07/22/98 from 0x1F -> 0x0F */
1930 active_tc = &host->targets[tar];
1931 host->active_tc = active_tc;
1932 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1933 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1934
1935 /* ------------- tag queueing ? ------------------- */
1936 if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1937 if ((initio_msgin_accept(host)) == -1)
1938 return -1;
1939 if (host->phase != MSG_IN)
1940 goto no_tag;
1941 outl(1, host->addr + TUL_SCnt0);
1942 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1943 if (wait_tulip(host) == -1)
1944 return -1;
1945 msg = inb(host->addr + TUL_SFifo); /* Read Tag Message */
1946
1947 if (msg < MSG_STAG || msg > MSG_OTAG) /* Is simple Tag */
1948 goto no_tag;
1949
1950 if (initio_msgin_accept(host) == -1)
1951 return -1;
1952
1953 if (host->phase != MSG_IN)
1954 goto no_tag;
1955
1956 outl(1, host->addr + TUL_SCnt0);
1957 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1958 if (wait_tulip(host) == -1)
1959 return -1;
1960 tag = inb(host->addr + TUL_SFifo); /* Read Tag ID */
1961 scb = host->scb + tag;
1962 if (scb->target != tar || scb->lun != lun) {
1963 return initio_msgout_abort_tag(host);
1964 }
1965 if (scb->status != SCB_BUSY) { /* 03/24/95 */
1966 return initio_msgout_abort_tag(host);
1967 }
1968 host->active = scb;
1969 if ((initio_msgin_accept(host)) == -1)
1970 return -1;
1971 } else { /* No tag */
1972 no_tag:
1973 if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
1974 return initio_msgout_abort_targ(host);
1975 }
1976 host->active = scb;
1977 if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
1978 if ((initio_msgin_accept(host)) == -1)
1979 return -1;
1980 }
1981 }
1982 return 0;
1983}
1984
1985/**
1986 * int_initio_bad_seq - out of phase
1987 * @host: InitIO host flagging event
1988 *
1989 * We have ended up out of phase somehow. Reset the host controller
1990 * and throw all our toys out of the pram. Let the midlayer clean up
1991 */
1992
1993static int int_initio_bad_seq(struct initio_host * host)
1994{ /* target wrong phase */
1995 struct scsi_ctrl_blk *scb;
1996 int i;
1997
1998 initio_reset_scsi(host, 10);
1999
2000 while ((scb = initio_pop_busy_scb(host)) != NULL) {
2001 scb->hastat = HOST_BAD_PHAS;
2002 initio_append_done_scb(host, scb);
2003 }
2004 for (i = 0; i < host->max_tar; i++)
2005 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2006 return -1;
2007}
2008
2009
2010/**
2011 * initio_msgout_abort_targ - abort a tag
2012 * @host: InitIO host
2013 *
2014 * Abort when the target/lun does not match or when our SCB is not
2015 * busy. Used by untagged commands.
2016 */
2017
2018static int initio_msgout_abort_targ(struct initio_host * host)
2019{
2020
2021 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2022 if (initio_msgin_accept(host) == -1)
2023 return -1;
2024 if (host->phase != MSG_OUT)
2025 return initio_bad_seq(host);
2026
2027 outb(MSG_ABORT, host->addr + TUL_SFifo);
2028 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2029
2030 return initio_wait_disc(host);
2031}
2032
2033/**
2034 * initio_msgout_abort_tag - abort a tag
2035 * @host: InitIO host
2036 *
2037 * Abort when the target/lun does not match or when our SCB is not
2038 * busy. Used for tagged commands.
2039 */
2040
2041static int initio_msgout_abort_tag(struct initio_host * host)
2042{
2043
2044 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2045 if (initio_msgin_accept(host) == -1)
2046 return -1;
2047 if (host->phase != MSG_OUT)
2048 return initio_bad_seq(host);
2049
2050 outb(MSG_ABORT_TAG, host->addr + TUL_SFifo);
2051 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2052
2053 return initio_wait_disc(host);
2054
2055}
2056
2057/**
2058 * initio_msgin - Message in
2059 * @host: InitIO Host
2060 *
2061 * Process incoming message
2062 */
2063static int initio_msgin(struct initio_host * host)
2064{
2065 struct target_control *active_tc;
2066
2067 for (;;) {
2068 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2069
2070 outl(1, host->addr + TUL_SCnt0);
2071 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2072 if (wait_tulip(host) == -1)
2073 return -1;
2074
2075 switch (inb(host->addr + TUL_SFifo)) {
2076 case MSG_DISC: /* Disconnect msg */
2077 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2078 return initio_wait_disc(host);
2079 case MSG_SDP:
2080 case MSG_RESTORE:
2081 case MSG_NOP:
2082 initio_msgin_accept(host);
2083 break;
2084 case MSG_REJ: /* Clear ATN first */
2085 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
2086 host->addr + TUL_SSignal);
2087 active_tc = host->active_tc;
2088 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) /* do sync nego */
2089 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
2090 host->addr + TUL_SSignal);
2091 initio_msgin_accept(host);
2092 break;
2093 case MSG_EXTEND: /* extended msg */
2094 initio_msgin_extend(host);
2095 break;
2096 case MSG_IGNOREWIDE:
2097 initio_msgin_accept(host);
2098 break;
2099 case MSG_COMP:
2100 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2101 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2102 return initio_wait_done_disc(host);
2103 default:
2104 initio_msgout_reject(host);
2105 break;
2106 }
2107 if (host->phase != MSG_IN)
2108 return host->phase;
2109 }
2110 /* statement won't reach here */
2111}
2112
2113static int initio_msgout_reject(struct initio_host * host)
2114{
2115 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2116
2117 if (initio_msgin_accept(host) == -1)
2118 return -1;
2119
2120 if (host->phase == MSG_OUT) {
2121 outb(MSG_REJ, host->addr + TUL_SFifo); /* Msg reject */
2122 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2123 return wait_tulip(host);
2124 }
2125 return host->phase;
2126}
2127
2128static int initio_msgout_ide(struct initio_host * host)
2129{
2130 outb(MSG_IDE, host->addr + TUL_SFifo); /* Initiator Detected Error */
2131 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2132 return wait_tulip(host);
2133}
2134
2135static int initio_msgin_extend(struct initio_host * host)
2136{
2137 u8 len, idx;
2138
2139 if (initio_msgin_accept(host) != MSG_IN)
2140 return host->phase;
2141
2142 /* Get extended msg length */
2143 outl(1, host->addr + TUL_SCnt0);
2144 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2145 if (wait_tulip(host) == -1)
2146 return -1;
2147
2148 len = inb(host->addr + TUL_SFifo);
2149 host->msg[0] = len;
2150 for (idx = 1; len != 0; len--) {
2151
2152 if ((initio_msgin_accept(host)) != MSG_IN)
2153 return host->phase;
2154 outl(1, host->addr + TUL_SCnt0);
2155 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2156 if (wait_tulip(host) == -1)
2157 return -1;
2158 host->msg[idx++] = inb(host->addr + TUL_SFifo);
2159 }
2160 if (host->msg[1] == 1) { /* if it's synchronous data transfer request */
2161 u8 r;
2162 if (host->msg[0] != 3) /* if length is not right */
2163 return initio_msgout_reject(host);
2164 if (host->active_tc->flags & TCF_NO_SYNC_NEGO) { /* Set OFFSET=0 to do async, nego back */
2165 host->msg[3] = 0;
2166 } else {
2167 if (initio_msgin_sync(host) == 0 &&
2168 (host->active_tc->flags & TCF_SYNC_DONE)) {
2169 initio_sync_done(host);
2170 return initio_msgin_accept(host);
2171 }
2172 }
2173
2174 r = inb(host->addr + TUL_SSignal);
2175 outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
2176 host->addr + TUL_SSignal);
2177 if (initio_msgin_accept(host) != MSG_OUT)
2178 return host->phase;
2179 /* sync msg out */
2180 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2181
2182 initio_sync_done(host);
2183
2184 outb(MSG_EXTEND, host->addr + TUL_SFifo);
2185 outb(3, host->addr + TUL_SFifo);
2186 outb(1, host->addr + TUL_SFifo);
2187 outb(host->msg[2], host->addr + TUL_SFifo);
2188 outb(host->msg[3], host->addr + TUL_SFifo);
2189 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2190 return wait_tulip(host);
2191 }
2192 if (host->msg[0] != 2 || host->msg[1] != 3)
2193 return initio_msgout_reject(host);
2194 /* if it's WIDE DATA XFER REQ */
2195 if (host->active_tc->flags & TCF_NO_WDTR) {
2196 host->msg[2] = 0;
2197 } else {
2198 if (host->msg[2] > 2) /* > 32 bits */
2199 return initio_msgout_reject(host);
2200 if (host->msg[2] == 2) { /* == 32 */
2201 host->msg[2] = 1;
2202 } else {
2203 if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
2204 wdtr_done(host);
2205 if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
2206 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2207 return initio_msgin_accept(host);
2208 }
2209 }
2210 }
2211 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2212
2213 if (initio_msgin_accept(host) != MSG_OUT)
2214 return host->phase;
2215 /* WDTR msg out */
2216 outb(MSG_EXTEND, host->addr + TUL_SFifo);
2217 outb(2, host->addr + TUL_SFifo);
2218 outb(3, host->addr + TUL_SFifo);
2219 outb(host->msg[2], host->addr + TUL_SFifo);
2220 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2221 return wait_tulip(host);
2222}
2223
2224static int initio_msgin_sync(struct initio_host * host)
2225{
2226 char default_period;
2227
2228 default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
2229 if (host->msg[3] > MAX_OFFSET) {
2230 host->msg[3] = MAX_OFFSET;
2231 if (host->msg[2] < default_period) {
2232 host->msg[2] = default_period;
2233 return 1;
2234 }
2235 if (host->msg[2] >= 59) /* Change to async */
2236 host->msg[3] = 0;
2237 return 1;
2238 }
2239 /* offset requests asynchronous transfers ? */
2240 if (host->msg[3] == 0) {
2241 return 0;
2242 }
2243 if (host->msg[2] < default_period) {
2244 host->msg[2] = default_period;
2245 return 1;
2246 }
2247 if (host->msg[2] >= 59) {
2248 host->msg[3] = 0;
2249 return 1;
2250 }
2251 return 0;
2252}
2253
2254static int wdtr_done(struct initio_host * host)
2255{
2256 host->active_tc->flags &= ~TCF_SYNC_DONE;
2257 host->active_tc->flags |= TCF_WDTR_DONE;
2258
2259 host->active_tc->js_period = 0;
2260 if (host->msg[2]) /* if 16 bit */
2261 host->active_tc->js_period |= TSC_WIDE_SCSI;
2262 host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
2263 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2264 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2265
2266 return 1;
2267}
2268
2269static int initio_sync_done(struct initio_host * host)
2270{
2271 int i;
2272
2273 host->active_tc->flags |= TCF_SYNC_DONE;
2274
2275 if (host->msg[3]) {
2276 host->active_tc->js_period |= host->msg[3];
2277 for (i = 0; i < 8; i++) {
2278 if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
2279 break;
2280 }
2281 host->active_tc->js_period |= (i << 4);
2282 host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
2283 }
2284 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2285 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2286
2287 return -1;
2288}
2289
2290
2291static int initio_post_scsi_rst(struct initio_host * host)
2292{
2293 struct scsi_ctrl_blk *scb;
2294 struct target_control *active_tc;
2295 int i;
2296
2297 host->active = NULL;
2298 host->active_tc = NULL;
2299 host->flags = 0;
2300
2301 while ((scb = initio_pop_busy_scb(host)) != NULL) {
2302 scb->hastat = HOST_BAD_PHAS;
2303 initio_append_done_scb(host, scb);
2304 }
2305 /* clear sync done flag */
2306 active_tc = &host->targets[0];
2307 for (i = 0; i < host->max_tar; active_tc++, i++) {
2308 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2309 /* Initialize the sync. xfer register values to an asyn xfer */
2310 active_tc->js_period = 0;
2311 active_tc->sconfig0 = host->sconf1;
2312 host->act_tags[0] = 0; /* 07/22/98 */
2313 host->targets[i].flags &= ~TCF_BUSY; /* 07/22/98 */
2314 } /* for */
2315
2316 return -1;
2317}
2318
2319static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
2320{
2321 scb->status |= SCB_SELECT;
2322 scb->next_state = 0x1;
2323 host->active = scb;
2324 host->active_tc = &host->targets[scb->target];
2325 outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
2326}
2327
2328
2329static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
2330{
2331 int i;
2332
2333 scb->status |= SCB_SELECT;
2334 scb->next_state = 0x2;
2335
2336 outb(scb->ident, host->addr + TUL_SFifo);
2337 for (i = 0; i < (int) scb->cdblen; i++)
2338 outb(scb->cdb[i], host->addr + TUL_SFifo);
2339 host->active_tc = &host->targets[scb->target];
2340 host->active = scb;
2341 outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
2342}
2343
2344static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
2345{
2346 int i;
2347
2348 scb->status |= SCB_SELECT;
2349 scb->next_state = 0x2;
2350
2351 outb(scb->ident, host->addr + TUL_SFifo);
2352 outb(scb->tagmsg, host->addr + TUL_SFifo);
2353 outb(scb->tagid, host->addr + TUL_SFifo);
2354 for (i = 0; i < scb->cdblen; i++)
2355 outb(scb->cdb[i], host->addr + TUL_SFifo);
2356 host->active_tc = &host->targets[scb->target];
2357 host->active = scb;
2358 outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
2359}
2360
2361/**
2362 * initio_bus_device_reset - SCSI Bus Device Reset
2363 * @host: InitIO host to reset
2364 *
2365 * Perform a device reset and abort all pending SCBs for the
2366 * victim device
2367 */
2368int initio_bus_device_reset(struct initio_host * host)
2369{
2370 struct scsi_ctrl_blk *scb = host->active;
2371 struct target_control *active_tc = host->active_tc;
2372 struct scsi_ctrl_blk *tmp, *prev;
2373 u8 tar;
2374
2375 if (host->phase != MSG_OUT)
2376 return int_initio_bad_seq(host); /* Unexpected phase */
2377
2378 initio_unlink_pend_scb(host, scb);
2379 initio_release_scb(host, scb);
2380
2381
2382 tar = scb->target; /* target */
2383 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
2384 /* clr sync. nego & WDTR flags 07/22/98 */
2385
2386 /* abort all SCB with same target */
2387 prev = tmp = host->first_busy; /* Check Busy queue */
2388 while (tmp != NULL) {
2389 if (tmp->target == tar) {
2390 /* unlink it */
2391 if (tmp == host->first_busy) {
2392 if ((host->first_busy = tmp->next) == NULL)
2393 host->last_busy = NULL;
2394 } else {
2395 prev->next = tmp->next;
2396 if (tmp == host->last_busy)
2397 host->last_busy = prev;
2398 }
2399 tmp->hastat = HOST_ABORTED;
2400 initio_append_done_scb(host, tmp);
2401 }
2402 /* Previous haven't change */
2403 else {
2404 prev = tmp;
2405 }
2406 tmp = tmp->next;
2407 }
2408 outb(MSG_DEVRST, host->addr + TUL_SFifo);
2409 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2410 return initio_wait_disc(host);
2411
2412}
2413
2414static int initio_msgin_accept(struct initio_host * host)
2415{
2416 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2417 return wait_tulip(host);
2418}
2419
2420static int wait_tulip(struct initio_host * host)
2421{
2422
2423 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2424 & TSS_INT_PENDING))
2425 cpu_relax();
2426
2427 host->jsint = inb(host->addr + TUL_SInt);
2428 host->phase = host->jsstatus0 & TSS_PH_MASK;
2429 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
2430
2431 if (host->jsint & TSS_RESEL_INT) /* if SCSI bus reset detected */
2432 return int_initio_resel(host);
2433 if (host->jsint & TSS_SEL_TIMEOUT) /* if selected/reselected timeout interrupt */
2434 return int_initio_busfree(host);
2435 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2436 return int_initio_scsi_rst(host);
2437
2438 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2439 if (host->flags & HCF_EXPECT_DONE_DISC) {
2440 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2441 initio_unlink_busy_scb(host, host->active);
2442 host->active->hastat = 0;
2443 initio_append_done_scb(host, host->active);
2444 host->active = NULL;
2445 host->active_tc = NULL;
2446 host->flags &= ~HCF_EXPECT_DONE_DISC;
2447 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2448 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2449 return -1;
2450 }
2451 if (host->flags & HCF_EXPECT_DISC) {
2452 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2453 host->active = NULL;
2454 host->active_tc = NULL;
2455 host->flags &= ~HCF_EXPECT_DISC;
2456 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2457 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2458 return -1;
2459 }
2460 return int_initio_busfree(host);
2461 }
2462 /* The old code really does the below. Can probably be removed */
2463 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
2464 return host->phase;
2465 return host->phase;
2466}
2467
2468static int initio_wait_disc(struct initio_host * host)
2469{
2470 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
2471 cpu_relax();
2472
2473 host->jsint = inb(host->addr + TUL_SInt);
2474
2475 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2476 return int_initio_scsi_rst(host);
2477 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2478 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2479 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2480 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2481 host->active = NULL;
2482 return -1;
2483 }
2484 return initio_bad_seq(host);
2485}
2486
2487static int initio_wait_done_disc(struct initio_host * host)
2488{
2489 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2490 & TSS_INT_PENDING))
2491 cpu_relax();
2492
2493 host->jsint = inb(host->addr + TUL_SInt);
2494
2495 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2496 return int_initio_scsi_rst(host);
2497 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2498 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2499 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2500 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2501 initio_unlink_busy_scb(host, host->active);
2502
2503 initio_append_done_scb(host, host->active);
2504 host->active = NULL;
2505 return -1;
2506 }
2507 return initio_bad_seq(host);
2508}
2509
2510/**
2511 * i91u_intr - IRQ handler
2512 * @irqno: IRQ number
2513 * @dev_id: IRQ identifier
2514 *
2515 * Take the relevant locks and then invoke the actual isr processing
2516 * code under the lock.
2517 */
2518
2519static irqreturn_t i91u_intr(int irqno, void *dev_id)
2520{
2521 struct Scsi_Host *dev = dev_id;
2522 unsigned long flags;
2523 int r;
2524
2525 spin_lock_irqsave(dev->host_lock, flags);
2526 r = initio_isr((struct initio_host *)dev->hostdata);
2527 spin_unlock_irqrestore(dev->host_lock, flags);
2528 if (r)
2529 return IRQ_HANDLED;
2530 else
2531 return IRQ_NONE;
2532}
2533
2534
2535/**
2536 * initio_build_scb - Build the mappings and SCB
2537 * @host: InitIO host taking the command
2538 * @cblk: Firmware command block
2539 * @cmnd: SCSI midlayer command block
2540 *
2541 * Translate the abstract SCSI command into a firmware command block
2542 * suitable for feeding to the InitIO host controller. This also requires
2543 * we build the scatter gather lists and ensure they are mapped properly.
2544 */
2545
2546static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
2547{ /* Create corresponding SCB */
2548 struct scatterlist *sglist;
2549 struct sg_entry *sg; /* Pointer to SG list */
2550 int i, nseg;
2551 long total_len;
2552 dma_addr_t dma_addr;
2553
2554 /* Fill in the command headers */
2555 cblk->post = i91uSCBPost; /* i91u's callback routine */
2556 cblk->srb = cmnd;
2557 cblk->opcode = ExecSCSI;
2558 cblk->flags = SCF_POST; /* After SCSI done, call post routine */
2559 cblk->target = cmnd->device->id;
2560 cblk->lun = cmnd->device->lun;
2561 cblk->ident = cmnd->device->lun | DISC_ALLOW;
2562
2563 cblk->flags |= SCF_SENSE; /* Turn on auto request sense */
2564
2565 /* Map the sense buffer into bus memory */
2566 dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
2567 SENSE_SIZE, DMA_FROM_DEVICE);
2568 cblk->senseptr = (u32)dma_addr;
2569 cblk->senselen = SENSE_SIZE;
2570 cmnd->SCp.ptr = (char *)(unsigned long)dma_addr;
2571 cblk->cdblen = cmnd->cmd_len;
2572
2573 /* Clear the returned status */
2574 cblk->hastat = 0;
2575 cblk->tastat = 0;
2576 /* Command the command */
2577 memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
2578
2579 /* Set up tags */
2580 if (cmnd->device->tagged_supported) { /* Tag Support */
2581 cblk->tagmsg = SIMPLE_QUEUE_TAG; /* Do simple tag only */
2582 } else {
2583 cblk->tagmsg = 0; /* No tag support */
2584 }
2585
2586 /* todo handle map_sg error */
2587 nseg = scsi_dma_map(cmnd);
2588 BUG_ON(nseg < 0);
2589 if (nseg) {
2590 dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
2591 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2592 DMA_BIDIRECTIONAL);
2593 cblk->bufptr = (u32)dma_addr;
2594 cmnd->SCp.dma_handle = dma_addr;
2595
2596 cblk->sglen = nseg;
2597
2598 cblk->flags |= SCF_SG; /* Turn on SG list flag */
2599 total_len = 0;
2600 sg = &cblk->sglist[0];
2601 scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
2602 sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
2603 sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
2604 total_len += sg_dma_len(sglist);
2605 ++sg;
2606 }
2607
2608 cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
2609 total_len : scsi_bufflen(cmnd);
2610 } else { /* No data transfer required */
2611 cblk->buflen = 0;
2612 cblk->sglen = 0;
2613 }
2614}
2615
2616/**
2617 * i91u_queuecommand - Queue a new command if possible
2618 * @cmd: SCSI command block from the mid layer
2619 * @done: Completion handler
2620 *
2621 * Attempts to queue a new command with the host adapter. Will return
2622 * zero if successful or indicate a host busy condition if not (which
2623 * will cause the mid layer to call us again later with the command)
2624 */
2625
2626static int i91u_queuecommand_lck(struct scsi_cmnd *cmd,
2627 void (*done)(struct scsi_cmnd *))
2628{
2629 struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2630 struct scsi_ctrl_blk *cmnd;
2631
2632 cmd->scsi_done = done;
2633
2634 cmnd = initio_alloc_scb(host);
2635 if (!cmnd)
2636 return SCSI_MLQUEUE_HOST_BUSY;
2637
2638 initio_build_scb(host, cmnd, cmd);
2639 initio_exec_scb(host, cmnd);
2640 return 0;
2641}
2642
2643static DEF_SCSI_QCMD(i91u_queuecommand)
2644
2645/**
2646 * i91u_bus_reset - reset the SCSI bus
2647 * @cmnd: Command block we want to trigger the reset for
2648 *
2649 * Initiate a SCSI bus reset sequence
2650 */
2651
2652static int i91u_bus_reset(struct scsi_cmnd * cmnd)
2653{
2654 struct initio_host *host;
2655
2656 host = (struct initio_host *) cmnd->device->host->hostdata;
2657
2658 spin_lock_irq(cmnd->device->host->host_lock);
2659 initio_reset_scsi(host, 0);
2660 spin_unlock_irq(cmnd->device->host->host_lock);
2661
2662 return SUCCESS;
2663}
2664
2665/**
2666 * i91u_biospararm - return the "logical geometry
2667 * @sdev: SCSI device
2668 * @dev; Matching block device
2669 * @capacity: Sector size of drive
2670 * @info_array: Return space for BIOS geometry
2671 *
2672 * Map the device geometry in a manner compatible with the host
2673 * controller BIOS behaviour.
2674 *
2675 * FIXME: limited to 2^32 sector devices.
2676 */
2677
2678static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2679 sector_t capacity, int *info_array)
2680{
2681 struct initio_host *host; /* Point to Host adapter control block */
2682 struct target_control *tc;
2683
2684 host = (struct initio_host *) sdev->host->hostdata;
2685 tc = &host->targets[sdev->id];
2686
2687 if (tc->heads) {
2688 info_array[0] = tc->heads;
2689 info_array[1] = tc->sectors;
2690 info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
2691 } else {
2692 if (tc->drv_flags & TCF_DRV_255_63) {
2693 info_array[0] = 255;
2694 info_array[1] = 63;
2695 info_array[2] = (unsigned long)capacity / 255 / 63;
2696 } else {
2697 info_array[0] = 64;
2698 info_array[1] = 32;
2699 info_array[2] = (unsigned long)capacity >> 11;
2700 }
2701 }
2702
2703#if defined(DEBUG_BIOSPARAM)
2704 if (i91u_debug & debug_biosparam) {
2705 printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2706 info_array[0], info_array[1], info_array[2]);
2707 printk("WARNING: check, if the bios geometry is correct.\n");
2708 }
2709#endif
2710
2711 return 0;
2712}
2713
2714/**
2715 * i91u_unmap_scb - Unmap a command
2716 * @pci_dev: PCI device the command is for
2717 * @cmnd: The command itself
2718 *
2719 * Unmap any PCI mapping/IOMMU resources allocated when the command
2720 * was mapped originally as part of initio_build_scb
2721 */
2722
2723static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
2724{
2725 /* auto sense buffer */
2726 if (cmnd->SCp.ptr) {
2727 dma_unmap_single(&pci_dev->dev,
2728 (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
2729 SENSE_SIZE, DMA_FROM_DEVICE);
2730 cmnd->SCp.ptr = NULL;
2731 }
2732
2733 /* request buffer */
2734 if (scsi_sg_count(cmnd)) {
2735 dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
2736 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2737 DMA_BIDIRECTIONAL);
2738
2739 scsi_dma_unmap(cmnd);
2740 }
2741}
2742
2743/**
2744 * i91uSCBPost - SCSI callback
2745 * @host: Pointer to host adapter control block.
2746 * @cmnd: Pointer to SCSI control block.
2747 *
2748 * This is callback routine be called when tulip finish one
2749 * SCSI command.
2750 */
2751
2752static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2753{
2754 struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2755 struct initio_host *host;
2756 struct scsi_ctrl_blk *cblk;
2757
2758 host = (struct initio_host *) host_mem;
2759 cblk = (struct scsi_ctrl_blk *) cblk_mem;
2760 if ((cmnd = cblk->srb) == NULL) {
2761 printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2762 WARN_ON(1);
2763 initio_release_scb(host, cblk); /* Release SCB for current channel */
2764 return;
2765 }
2766
2767 /*
2768 * Remap the firmware error status into a mid layer one
2769 */
2770 switch (cblk->hastat) {
2771 case 0x0:
2772 case 0xa: /* Linked command complete without error and linked normally */
2773 case 0xb: /* Linked command complete without error interrupt generated */
2774 cblk->hastat = 0;
2775 break;
2776
2777 case 0x11: /* Selection time out-The initiator selection or target
2778 reselection was not complete within the SCSI Time out period */
2779 cblk->hastat = DID_TIME_OUT;
2780 break;
2781
2782 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
2783 phase sequence was requested by the target. The host adapter
2784 will generate a SCSI Reset Condition, notifying the host with
2785 a SCRD interrupt */
2786 cblk->hastat = DID_RESET;
2787 break;
2788
2789 case 0x1a: /* SCB Aborted. 07/21/98 */
2790 cblk->hastat = DID_ABORT;
2791 break;
2792
2793 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
2794 than was allocated by the Data Length field or the sum of the
2795 Scatter / Gather Data Length fields. */
2796 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2797 case 0x16: /* Invalid SCB Operation Code. */
2798
2799 default:
2800 printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2801 cblk->hastat = DID_ERROR; /* Couldn't find any better */
2802 break;
2803 }
2804
2805 cmnd->result = cblk->tastat | (cblk->hastat << 16);
2806 i91u_unmap_scb(host->pci_dev, cmnd);
2807 cmnd->scsi_done(cmnd); /* Notify system DONE */
2808 initio_release_scb(host, cblk); /* Release SCB for current channel */
2809}
2810
2811static struct scsi_host_template initio_template = {
2812 .proc_name = "INI9100U",
2813 .name = "Initio INI-9X00U/UW SCSI device driver",
2814 .queuecommand = i91u_queuecommand,
2815 .eh_bus_reset_handler = i91u_bus_reset,
2816 .bios_param = i91u_biosparam,
2817 .can_queue = MAX_TARGETS * i91u_MAXQUEUE,
2818 .this_id = 1,
2819 .sg_tablesize = SG_ALL,
2820 .use_clustering = ENABLE_CLUSTERING,
2821};
2822
2823static int initio_probe_one(struct pci_dev *pdev,
2824 const struct pci_device_id *id)
2825{
2826 struct Scsi_Host *shost;
2827 struct initio_host *host;
2828 u32 reg;
2829 u16 bios_seg;
2830 struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2831 int num_scb, i, error;
2832
2833 error = pci_enable_device(pdev);
2834 if (error)
2835 return error;
2836
2837 pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2838 bios_seg = (u16) (reg & 0xFF);
2839 if (((reg & 0xFF00) >> 8) == 0xFF)
2840 reg = 0;
2841 bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2842
2843 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
2844 printk(KERN_WARNING "i91u: Could not set 32 bit DMA mask\n");
2845 error = -ENODEV;
2846 goto out_disable_device;
2847 }
2848 shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2849 if (!shost) {
2850 printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2851 error = -ENOMEM;
2852 goto out_disable_device;
2853 }
2854 host = (struct initio_host *)shost->hostdata;
2855 memset(host, 0, sizeof(struct initio_host));
2856 host->addr = pci_resource_start(pdev, 0);
2857 host->bios_addr = bios_seg;
2858
2859 if (!request_region(host->addr, 256, "i91u")) {
2860 printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2861 error = -ENODEV;
2862 goto out_host_put;
2863 }
2864
2865 if (initio_tag_enable) /* 1.01i */
2866 num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2867 else
2868 num_scb = MAX_TARGETS + 3; /* 1-tape, 1-CD_ROM, 1- extra */
2869
2870 for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2871 i = num_scb * sizeof(struct scsi_ctrl_blk);
2872 if ((scb = kzalloc(i, GFP_DMA)) != NULL)
2873 break;
2874 }
2875
2876 if (!scb) {
2877 printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2878 error = -ENOMEM;
2879 goto out_release_region;
2880 }
2881
2882 host->pci_dev = pdev;
2883
2884 host->semaph = 1;
2885 spin_lock_init(&host->semaph_lock);
2886 host->num_scbs = num_scb;
2887 host->scb = scb;
2888 host->next_pending = scb;
2889 host->next_avail = scb;
2890 for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2891 tmp->tagid = i;
2892 if (i != 0)
2893 prev->next = tmp;
2894 prev = tmp;
2895 }
2896 prev->next = NULL;
2897 host->scb_end = tmp;
2898 host->first_avail = scb;
2899 host->last_avail = prev;
2900 spin_lock_init(&host->avail_lock);
2901
2902 initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
2903
2904 host->jsstatus0 = 0;
2905
2906 shost->io_port = host->addr;
2907 shost->n_io_port = 0xff;
2908 shost->can_queue = num_scb; /* 03/05/98 */
2909 shost->unique_id = host->addr;
2910 shost->max_id = host->max_tar;
2911 shost->max_lun = 32; /* 10/21/97 */
2912 shost->irq = pdev->irq;
2913 shost->this_id = host->scsi_id; /* Assign HCS index */
2914 shost->base = host->addr;
2915 shost->sg_tablesize = TOTAL_SG_ENTRY;
2916
2917 error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
2918 if (error < 0) {
2919 printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2920 goto out_free_scbs;
2921 }
2922
2923 pci_set_drvdata(pdev, shost);
2924
2925 error = scsi_add_host(shost, &pdev->dev);
2926 if (error)
2927 goto out_free_irq;
2928 scsi_scan_host(shost);
2929 return 0;
2930out_free_irq:
2931 free_irq(pdev->irq, shost);
2932out_free_scbs:
2933 kfree(host->scb);
2934out_release_region:
2935 release_region(host->addr, 256);
2936out_host_put:
2937 scsi_host_put(shost);
2938out_disable_device:
2939 pci_disable_device(pdev);
2940 return error;
2941}
2942
2943/**
2944 * initio_remove_one - control shutdown
2945 * @pdev: PCI device being released
2946 *
2947 * Release the resources assigned to this adapter after it has
2948 * finished being used.
2949 */
2950
2951static void initio_remove_one(struct pci_dev *pdev)
2952{
2953 struct Scsi_Host *host = pci_get_drvdata(pdev);
2954 struct initio_host *s = (struct initio_host *)host->hostdata;
2955 scsi_remove_host(host);
2956 free_irq(pdev->irq, host);
2957 release_region(s->addr, 256);
2958 scsi_host_put(host);
2959 pci_disable_device(pdev);
2960}
2961
2962MODULE_LICENSE("GPL");
2963
2964static struct pci_device_id initio_pci_tbl[] = {
2965 {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2966 {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2967 {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2968 {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2969 {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2970 {0,}
2971};
2972MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2973
2974static struct pci_driver initio_pci_driver = {
2975 .name = "initio",
2976 .id_table = initio_pci_tbl,
2977 .probe = initio_probe_one,
2978 .remove = initio_remove_one,
2979};
2980
2981static int __init initio_init_driver(void)
2982{
2983 return pci_register_driver(&initio_pci_driver);
2984}
2985
2986static void __exit initio_exit_driver(void)
2987{
2988 pci_unregister_driver(&initio_pci_driver);
2989}
2990
2991MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
2992MODULE_AUTHOR("Initio Corporation");
2993MODULE_LICENSE("GPL");
2994
2995module_init(initio_init_driver);
2996module_exit(initio_exit_driver);