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